qvga tft lcd wiki free sample

The decision hinges on whether it is a dicdef, or if it has enough content to sustain itself as an article on its own. As dead pixels are only related to LCD"s, but aren"t LCD"s themselves, I suppose we should keep them separate. Kareeser|

But to my understanding the light transmitting through or emitting from an LCD is always polarized (which can be checked by looking at an LCD through such a filter)and a polarization filter absorbs "wrongly" aligned waves (my physics are a bit fuzzy there). As I don"t know polarized lightsources (could be wrong there aswell), the minimum absorbation rate would be 50%, where it didn"t matter whether the light passed through once or twice.

can we please fix this section by editting it into a real encyclopedia style please. a listing of the problem and how you might fix it should be sufficient and it isn"t that hard to change. We do not need text from a forum in a wiki article, this is not a self-help page, but an encyclopedia entry and it should be written that way. -Thebdj 06:26, 9 February 2006 (UTC)

I took a picture of the illustration, but what"s the point. It"s the same picture as on the article page, but framed in an LCD monitor. --Ancheta Wis 01:51, 8 May 2006 (UTC)

It"s completely separate from the general LCD article and is useful for a casual browser like me. please don"t merge it 203.129.39.114 13:21, 20 May 2006 (UTC)

I propose that we merge Color LCD to this article, simply because the information contained in the Color LCD article is too short to have a "Main aticle" link from this page. Moreover, the content on this page (in the "Color LCD" section) and the content on the Color LCD page, differ. Therefore, having the same information on this page, while making Color LCD a redirect, is my solution. Kareeser|

This kind of pixel-layout is found in S-IPS LCDs (super in-plane switching). The chevron-shape is used to widen the viewing-cone (range of viewing directions with good contrast and low color-shift).

I think these terms are equivalent. I started a new article on "transreflective" when I stumbled across the mention of "transflective" in this article on LCDs.

The valuable PDF by Geoff Walker at http://www.walkermobile.com/OutdoorDisplayPrimer.pdf is now almost 2-1/2 years old. There"s a nice definition of transreflective at Smart Computing. There are excellent images at http://t17.net/transflectiveTFT/

LCDs have longer response time than their plasma and CRT counterparts, creating ghosting and mixing when images rapidly change; this drawback, however, is continually improving as the technology progresses and is imperceptible in current LCD Computer Displays and TV"s. Also, for computer-use, it eliminates the problem of flicker.

I don"t know that I"d call it "almost imperceptible". I recently got an LCD TV (with a claimed response time of 8ms). When viewing rapidly panning images (the best example is to fire up a first-person shooter on a game console and manually pan left and right), the ghosting was not only perceptible, but thoroughly irritating and almost nausea inducing. I would definitely recommend adding to the article that the effect of long response times depends on what you"re viewing. Balfa 17:33, 21 August 2006 (UTC)

I think it is likely that what you observed was due not to response time but to the fact that an LCD pixel is constantly lit for the duration of the frame (16.7ms), whereas a CRT pixel is lit for only a fraction of a microsecond once during a frame. This means that even with an absolute zero response time, a panning image on an LCD panel will appear blurred while it may appear smooth on a CRT (if the image itself has no motion blur). The additional blurring in the case of LCD comes from the movement of our eyes; it doesn"t happen on CRT because our eyes do not move enough during the nanoseconds that a pixel remains lit. Ghosting caused by a slow response rate would be not only blurring, but also a constant "double image" - seeing two or more recent frames, or ghosts from them, simultaneously. This would be in addition to the motion blur. mmj (talk) 04:41, 8 January 2009 (UTC)

The viewing angle of a LCD is usually less than that of most other display technologies, thus reducing the number of people who can conveniently view the same image. However, this negative has actually been capitalized upon in two ways. Some vendors offer screens with intentionally reduced viewing angle, to provide additional privacy, such as when someone is using a laptop in a public place. Such a set can also show two different images to one viewer, providing a three-dimensional effect.

Some light guns do not work with this type of display since they do not have flexible lighting dynamics that CRTs have. However, the field emission display will be a potential replacement for LCD flat-panel displays since they emulate CRTs in some technological ways.

"Playing video games on an LCD T.V. isn"t recommended due to the controls being delayed, which can sometimes mess the player up in gameplay." is the current last line and is also covered by a higher line mentions screen lag , or delay time . PidGin128 from 149.168.174.18 19:07, 18 October 2007 (UTC)

It"s been deleted. If it"s verifiable, bring it back with a source; be sure to say who recommends against LCD here. Dicklyon 20:32, 18 October 2007 (UTC)

I think the "Some LCD monitors can cause migraines and eyestrain problems due to flicker from fluorescent backlights fed at 50 or 60 Hz." drawback should be deleted. I mean - this drawback is not exclusive to LCD displays. CRT displays flicker even more. Another thing: why is the article about LCD displays the only one that has a separate section for drawbacks? Fanboys defending CRT displays? --Lim-Dul (talk) 19:49, 23 December 2007 (UTC)

It is not only redundant, it is stupid and wrong! The more such wrong expressions are repeated by WikiPedia the more they seem to become "conventional" ... In the LCD community we usually use "LC-display" or just LCD.

It is hardly fair to justify the usage of LCD display by comparing the results of LC-display with LCD-display, since the most likely alternative (or at least, very notable alternative) is simply "LCD", in which case LCD (AND LC-display) [correct usages] would easily outnumber LCD-display [incorrect usage]. Of course there is the issue of LCD itself including results of LCD display, but I AM trying to establish that google fight is not relevant, even for discussions of usage and popularity.

I am extremely disappointed with Wikipedia. I am all for the colloquial development of language, but mostly in the sense of CHANGING definitions. This is simply a mistake. Worst of all is the reasoning -- a lot of people make the mistake, so it is OK for us to do it. Frankly, "a lot of people" are not encyclopedias. Wikipedia, on the other hand, (ideally) is.

Makers of non computer LCD displays often quote the raw pixel count (color sub pixels) of a color display, or will quote the raw pixels (color sub pixels) per line in a display.

IT IS ENTIRELY RACIST TO SUGGEST THAT LCDS CAUSE PROBLEMS FOR "SKIN TONES". IN REALITY THEY ONLY CAUSE AN ISSUE FOR THE LIGHT SKIN CHARACTERISTIC OF MANY EUROPEAN ETHNICITIES. PLEASE REMOVE THIS. 81.192.141.90 16:55, 10 January 2007 (UTC)

I think it would be very interestiingh to know what the power consumption of LCD displays are in comparison to other types of displays, and also now that I think of it there really should be a single page that makes a comparison of the wattage used by regular household appliances.``193.203.136.214 01:38, 28 January 2007 (UTC)

I"m an engineer and I don"t prize LCD screens. Engineers prize a full range of utilities not just power use. I prize my cathode ray tube tv because the colour is perfect from any viewing angle and it was cheap. Engineers have any number of variables to consider in design, so for one application an LCD will be useless and for another it will be useful. Can anyone tell me why, if power consumption is the only important variable in a screen, that cathode ray tubes tvs are still being designed? I reckon the "prized" part should be removed, engineers have opinions specific to the application and limiting factors they design for. 193.1.172.104 17:32, 23 April 2007 (UTC)

Please study verified sources before spreading rumors and nonsense here !I found the section to be pretty much incomprehensible. It should build on the foundation of the earlier sections of the article, but seems to assume some other background in how LCDs work.

But it"s not just this section. The one before doesn"t tell what the transistor is for, and seems to say that row/column addressing is unique to active matrix. And it alludes to some kind of refresh not otherwise described. (The hyperlink for "refresh" leads to an article whose only mention of LCDs is to say it is inapplicable to LCDs). It fails to state the difference between passive matrix and active matrix, referring to presence or absence of a "steady charge" which is never described.

I noticed that the LCD technology used for television displays had improved greatly of late and problems with viewing angle have been practically eliminated in affordable displays. I was hoping to find in this article an explanation of the technology used to achive this. If anyone knows, could you please add it in, for example to the history section. Thanks.

Why, in this section, am I barraged with information about Integrated circuits? I understand drawing a small analogy at the start to show how QA/QC in LCDs relates to other industry. This, however, seems to me like the entire section is meant to be a comparison between the two. As a casual reader, I wanted to scream out, "I don"t care!" I just wanted to learn about LCDs. Never mind that, this is the first time that IC is mentioned in the entire article. So the non-technical reader is left wondering "what the heck is an IC, why do I care, and what does any of that have to do with LCDs?"

Although the photo of the Wikipedia logo on the LCD display is very well-done, it"s both an unnecessary self-reference (Wikipedia:Avoid self-reference) and may run up against copyright issues, since the logo is not available under a free license. I suggest replacing it with another image based on a public domain source image. Dcoetzee 19:31, 16 November 2007 (UTC)

Each pixel of an LCD typically consists of a layer of molecules aligned between two transparent electrodes, and two polarizing filters, the axes of transmission of which are (in most of the cases) perpendicular to each other. With no liquid crystal between the polarizing filters, light passing through the first filter would be blocked by the second (crossed) polarizer.

LCD alarm clockThe optical effect of a twisted nematic device in the voltage-on state is far less dependent on variations in the device thickness than that in the voltage-off state. Because of this, these devices are usually operated between crossed polarizers such that they appear bright with no voltage (the eye is much more sensitive to variations in the dark state than the bright state). These devices can also be operated between parallel polarizers, in which case the bright and dark states are reversed. The voltage-off dark state in this configuration appears blotchy, however, because of small variations of thickness across the device.

Resolution: The horizontal and vertical size expressed in pixels (e.g., 1024x768). Unlike CRT monitors, LCD monitors have a native-supported resolution for best display effect.

Response time: The minimum time necessary to change a pixel"s color or brightness. Response time is also divided into rise and fall time. For LCD Monitors, this is measured in btb (black to black) or gtg (gray to gray). These different types of measurements make comparison difficult.

Refresh rate: The number of times per second in which the monitor draws the data it is being given. A refresh rate that is too low can cause flickering and will be more noticeable on larger monitors. Many high-end LCD televisions now have a 120 Hz refresh rate (current and former NTSC countries only). This allows for less distortion when movies filmed at 24 frames per second (fps) are viewed due to the elimination of telecine (3:2 pulldown). The rate of 120 was chosen as the least common multiple of 24 fps (cinema) and 30 fps (TV).

Low input refresh rates should not cause flicker in an LCD screen though, as the controller in the screen holds frames and re-displays them until a new frame is available (source is a physicist friend who was involved in OLED screens, I imagine there"ll be some relevant paper though)

Comparison of the OLPC XO-1 display (left) with a typical color LCD. The images show 1×1 mm of each screen. A typical LCD addresses groups of 3 locations as pixels. The XO-1 display addresses each location as a separate pixel.In color LCDs each individual pixel is divided into three cells, or subpixels, which are colored red, green, and blue, respectively, by additional filters (pigment filters, dye filters and metal oxide filters). Each subpixel can be controlled independently to yield thousands or millions of possible colors for each pixel. CRT monitors employ a similar "subpixel" structures via phosphors, although the electron beam employed in CRTs do not hit exact "subpixels".

Color components may be arrayed in various pixel geometries, depending on the monitor"s usage. If software knows which type of geometry is being used in a given LCD, this can be used to increase the apparent resolution of the monitor through subpixel rendering. This technique is especially useful for text anti-aliasing.

A general purpose alphanumeric LCD, with two lines of 16 characters.LCDs with a small number of segments, such as those used in digital watches and pocket calculators, have individual electrical contacts for each segment. An external dedicated circuit supplies an electric charge to control each segment. This display structure is unwieldy for more than a few display elements.

Small monochrome displays such as those found in personal organizers, or older laptop screens have a passive-matrix structure employing super-twisted nematic (STN) or double-layer STN (DSTN) technology—the latter of which addresses a color-shifting problem with the former—and color-STN (CSTN)—wherein color is added by using an internal filter. Each row or column of the display has a single electrical circuit. The pixels are addressed one at a time by row and column addresses. This type of display is called passive-matrix addressed because the pixel must retain its state between refreshes without the benefit of a steady electrical charge. As the number of pixels (and, correspondingly, columns and rows) increases, this type of display becomes less feasible. Very slow response times and poor contrast are typical of passive-matrix addressed LCDs.

High-resolution color displays such as modern LCD computer monitors and televisions use an active matrix structure. A matrix of thin-film transistors (TFTs) is added to the polarizing and color filters. Each pixel has its own dedicated transistor, allowing each column line to access one pixel. When a row line is activated, all of the column lines are connected to a row of pixels and the correct voltage is driven onto all of the column lines. The row line is then deactivated and the next row line is activated. All of the row lines are activated in sequence during a refresh operation. Active-matrix addressed displays look "brighter" and "sharper" than passive-matrix addressed displays of the same size, and generally have quicker response times, producing much better images. —Preceding unsigned comment added by 59.93.19.185 (talk) 07:16, 5 July 2008 (UTC)

The lead says that an LCD is an electro-optical amplitude modulator. Is it not an electrically modulated optical amplification device (subtly different), being controlled by an electro-optical amplitude modulator ? Electro-optic modulator (which is linked to electro-optical amplitude modulator on the article) says that the modulator may be applied in four areas including phase, frequency and amplitude which may affect the display prior to visibility but could an LCD display, without processing any picture just monochrome light, be switched and display light without an electro-optical amplitude modulator (hence not actually being one just completely dependant on it)? ~ R.T.G 08:06, 23 December 2008 (UTC)

T. Peter Brody did not create the first fully functional LCD, it was Scott H. Holmberg. —Preceding unsigned comment added by 98.246.71.85 (talk) 23:43, 17 March 2009 (UTC)

LCDs do not refresh the screen from top to bottom; every pixel is refreshed simultaneously. —Preceding unsigned comment added by 208.101.129.212 (talk) 06:40, 12 November 2009 (UTC)

Can someone write something about LCD TV"s having pixelated image problems. —Preceding unsigned comment added by Ericg33 (talk • contribs) 04:45, 20 July 2009 (UTC)

The article appears to be biased towards the use of LCDs as computer monitors. This may well be the most widespread use, but more balance is possibly required.

Brief History: This not really brief. Renaming as "History" would be sufficient, otherwise this could imply that the article is incomplete due to lack of time on the part of the author. Should be the next section. Consider using prose, rather than a bulleted list. If the article can be expanded, consider splitting in to a new article: History of LCD displays

Drawbacks: Consider using prose, rather than a bulleted list. Note:this detailed section on drawbacks puts a negative slant on LCDs that is not adquately compensated for neytrality in the other parts of the article.

Liquid crystal display → LCD — Per WP:ABBR: Acronyms should be used in page naming if the subject is almost exclusively known only by its acronym and is widely known and used in that form (e.g., NASA and radar). User:GraYoshi2x 02:05, 8 October 2009 (UTC)

Oppose. "LCD" is not an acronym (it contains no vowel and cannot be pronounced), unlike "NASA" or "radar"/"laser". No-one ever says "National Aeronautics and Space Administration" or "Light emission by stimulated emission of radiation", so those would be implausible search terms. "LCD" redirects to this article (despite its alternative meanings), so what"s the problem? Sussexonian (talk) 07:37, 8 October 2009 (UTC)

Brush up on your definitions and keep in mind Wikipedia is not a vote. Acronyms don"t have to be pronounceable and I have rarely heard LCD refer to anything other than this article. And if you oppose it, just say it directly, please.

I have edited my "No, thank you" above to "Oppose". An acronym is a word made from initial letters and NASA, NATO, radar and laser are examples. LCD and others are abbreviations not acronyms (I accept that the two are sometimes used interchangeably). The policy is WP:ABBR not WP:ACRO and the writer clearly understood the difference. The examples quoted (NASA, radar) have the specific features that (i) they are pronounceable and (ii) they are hardly ever spoken as complete phrases. "Patriot Act" is another example where Wikipedia"s article is named for the abbreviation. "FBI" and "CIA" are not: they are phrases spoken as abbreviations/initialisms and their full forms are well known. Sussexonian (talk) 07:57, 9 October 2009 (UTC)

I may go and look at some dictionaries, but there is a distinction made in the policy, between acronym and abbreviation, the examples in the policy comply with the restricted definition of acronym, and FBI is not a Wikipedia article name. On the other page you have said CIA/FBI are more well known by their abbreviations: that is exactly my point, as with LCD the more common identifier is the short form but Wikipedia has not chosen to rename Federal Bureau of Investigation. So the actual practice on Wikipedia seems to me to coincide with my interpretation. Sussexonian (talk) 22:25, 9 October 2009 (UTC)

Oppose. In the case of NASA, the acronym gets 127 million hits on Google, the full name only 5,000. In the case of LCD, the full name gets millions of hits on Google. 199.125.109.19 (talk) 14:03, 11 October 2009 (UTC)

Oppose. Normally Wikipedia articles should have a long name and the acronym should redirect to it; it requires strong evidence of "known by acronym only" before moving in that direction. Even IEEE has its article as the full name. --Alvestrand (talk) 16:51, 11 October 2009 (UTC)

The shocking lack of mention of handheld videogames and their importance in driving improvement of LCD technology is appalling.66.159.224.65 (talk) 20:38, 19 January 2010 (UTC)

I completely agree, the entire reason I came to this page at all was to learn more about the Game & Watch type systems. And I find it particularly insulting that the Brief history section goes directly from 1972 to 1998, one could claim the peak years of LCD advancement, all taking place in handheld game consoles. Zak Frost (talk) 13:18, 31 May 2010 (UTC)

It may be more accurate to say that some LCD display units suffer from this limitation, as different display devices are made differently. It depends on who is making the display unit, as to what ability they allow it to have. Some actually allow you to turn off scaling alltogether, but still do not allow "non-standard" resolutions or "small" resolutions. —Preceding unsigned comment added by 216.231.159.16 (talk) 20:21, 20 February 2010 (UTC)

I feel there needs to be a distiction made in this section as to which companies actually construct LCD Panels and which companies order LCD Panels from other manufacturers and simply assembly the components into a TV.

The only LCD Panels Manufacturers I know of are Philips and LG. Currently all the companies listed are strictly LCD TV or LCD Display manufacturers, they purchase LCD Panels from either Philips or LG and then assemble the displays. —Preceding unsigned comment added by 98.225.216.197 (talk) 13:22, 2 March 2010 (UTC)

I’ve seen zero-powered, bistable LCD with my own eyes, and the one I saw looked just like ordinary LCD which, as you know, don’t have the appearance of ink on paper: The characters sort of ‘hovers’ in the display, unlike the characters on, say, the Kindle’s display.

[Color gamut]: The range of colors that can be displayed; usually expressed as conforming to some standard such as the 1957 NTSC standard. Color gamut differs from color resolution in that color gamut expresses the total range of colors while color resolution indicates how many individual colors that range is divided into. An LCD can have a wide color gamut but still have weak color performance if the resolution is inadequate. Inadequate resolution will result in distinct color bands in an image where the colors are supposed to change continuously. This is termed "Posterization". Posterization used to be common but most LCD makers have moved to 36 bit color and beyond which is well beyond the chromatic resolution capability of humans. —Preceding unsigned comment added by Norman Hairston (talk • contribs) 20:08, 8 May 2010 (UTC)

I changed the portion on the invention of the active matrix LCD. While Peter Brody will tell you that he invented it(and he certainly did a lot to promote it), the active matrix LCD was invented in a lab that reported to Peter, not by Peter himself. His name is not on the patent.

Also, though I did not include it, two major events in the development of the LCD were the exit of Westinghouse from the TV business and the purchase of RCA by GE. Both events had a stiffing effect on display technology innovation that persists to this day. Peter Brody"s claim of ownership for the active matrix LCD further submerges the impact of innovative organizations on development of display technology. —Preceding unsigned comment added by 216.102.41.194 (talk) 14:58, 11 May 2010 (UTC)

You"re probably referring to birefringence, an angle-dependent refractive index due to anisotropy in the long-range ordering of molecules in the material. Have a look at "birefringence", "calcite" or BBO/KTP/DTP crystals. Birefringence (whilst important to LCDs) belongs in this article about as much as "covalent bonding" belongs in "internal combustion engine".

There was a section in here discussing upscaling lag. This is a problem of high-definition TVs and not of LCD panels (as the section seemed to imply). I thusly removed it. 208.101.135.65 (talk) 06:47, 16 July 2010 (UTC)

I have seen advertisements for LCD televisions with yellow but I have yet to hear about violet. Is it possible to manufacture violet LCD technology? LCD televisions with Red, Yellow, Green, Blue, and Violet would be very useful. -- Azemocram (talk) 22:12, 2 August 2010 (UTC)

After reading the article on Plasma Displays, which has an advantages/disadvantages section that lists pros and cons of plasma displays, I"m wondering why the LCD article doesn"t have the same kind of thing? If people are researching about LCD TV"s, there"s a good chance they"d want to know the pros and cons.

One more thing: Why does the introductory section of this article only compare LCDs to the outdated CRTs? It"s nice to know that LCDs CDs "...are more energy efficient and offer safer disposal than CRTs," but how do LCDs compare to plasma screens in these two aspects? CRTs are outdated, and while they were the precursor to LCD and Plasma screens, and it is good to know how LCDs compare with the CRTs they replaced, anyone shopping for a new TV will only care how LCDs compare to plasma screens.

The introduction of the article feels like a marketing add for LCD monitors. I wish not to jump to conclusions, but telling half the truth is still lying. I advice for a section describing the problems of LCD monitors. The introduction and comparison with CRT should be more balanced as well. Some of the problems of LCD monitors when compared to CRT include:

"In any case, colour range is rarely discussed as a feature of the display as LCDs are designed to match the colour ranges of the content that they are intended to show. Having a colour range that exceeds the content is a useless feature."

I presume this article is going to have a field day at some point discussing the technology behind the 3DS screen once that technology becomes more commonplace -- or at least when the 3DS itself is released. Unless there"s already a different article dedicated to glasses-free 3D LCD screens.

Hi. Should we mention the toxicity of broken LCD screens that are highlighted in many owner"s manuals as warnings and also in research studies such as this? Thanks. ~AH1

In "Brief history" a major milestone is missing: STN-LCDs allowed for the first time passive-matrix displays with considerable information content. More than 60 companies have taken licenses from the Swiss company Brown, Boveri & Cie to manufacture and sell STN-LCDs according to the patents mentioned in the proposed new entry.

So far the application of STN in the early Nintendo Game Boy is the only reference given [16]. However, early cellular phones and laptops also used this type of display. At that time active-matrix addressed LCDs were not yet ready for mass production.

1983: Researchers at Brown, Boveri & Cie (BBC), Switzerland, invented the super-twisted nematic (STN) structure for passive-matrix addressed LCDs. H. Amstutz et al were listed as inventors in the corresponding patent applications filed in Switzerland on July 7, 1983, and October 28, 1983. Patents were granted in Switzerland CH 665491, Europe EP 0131216 [1], US 4634229 and many more countries. Scientific details were published in [2].

[2] T.J. Scheffer and J. Nehring,"A new highly multiplexable LCD," Appl.Phys.Lett.,vol. 48, no. 10, pp. 1021-1023, Nov. 1984. — Preceding unsigned comment added by BBCLCD (talk • contribs) 09:48, 6 July 2011 (UTC)

1) The Overview section includes a link to multiplexed. This link is not helpful in the context of LCDs, as it explains multiplexing of telecommunicaton transmission. Display matrices are typically addressed by selecting row-by-row sequentially, with the corresponding picture information entered through the columns row-by-row. To address a full picture, a scan of all rows is accomplished in a frame.

2) Section on passive- and active-matrix addressing: The present text suggests that active-matrix addressing has replaced passive-matrix addressing entirely. However, due to higher manufacturing costs for TFTs, potential additional defects and higher power consumption due to backlighting of active-matrix displays, passive-matrix displays are still used for less demanding applications with less pixels than TVs and laptops, where lowest power consumption and/or reading in bright sunlight are of importance.

These is little discussion of "calculator" and segment (often used in instruments and dashboards) displays. As an encyclopedia article this seems like a basic introduction to static vs multiplexed control, etc. In general the article seems too closely tied to minute of current market trends rather than an good introduction to LCDs; what they are, how they work, etc. — Preceding unsigned comment added by 98.125.224.81 (talk) 17:10, 14 February 2012 (UTC)

The compound is used in the production of Liquid Crystal Display (LCD) Panels, in semiconductors, and in synthetic diamonds. According to Prather, the compound was initially missed by the Kyoto Protocol, the international treaty governing response to global warming, due to the fact that it was not widely used at the time."

Support Merge Yea looking into the subject further I have determined that it is a part of the Manufacturing of a LCD Display based on the Google Results. What I would love to see happen in this merge is to add this one line and make it a part of a new section on Manufacturing these things which the article currently lacks. Otherwise I feel this merger will be in vain. Sawblade5 (talk to me | my wiki life) 15:50, 2 February 2014 (UTC)

Oppose - There"s currently no obvious place to merge to and I suspect that Optical films have other applications outside of LCDs. ~KvnG 14:22, 27 February 2014 (UTC)

Oppose Per Kvng. The term "optical film" is problematic in that it has some widely varying meanings. The article is probably a long term stub wreck partially because of that; nobody with combined expertise, article architecture and wikipedia ability has come along to remedy the situation. LCD is just one of many uses / meanings. North8000 (talk) 20:30, 8 April 2014 (UTC)

Oppose - Per KvnG and User talk:North8000. "Optical film" is well sourced on Scholar and Google Books relating to the chemical and industrial usage. This is about far more than LCDs; it includes OLEDs plus ARs. Related discussions have occurred at Talk:Thin-film optics.

Removed the incorrect movie stub template on the article page and replaced the movie project on the Talk page with templates for WikiProjects Physics and Technology.SBaker43 (talk) 06:10, 28 January 2015 (UTC)

https://en.wikipedia.org/wiki/Special:Contributions/199.61.25.252 — Preceding unsigned comment added by DavidBoden (talk • contribs) 21:42, 19 May 2014 (UTC)

In the Disadvantages section under Input lag the first sentence "Input lag, because the LCD"s A/D converter waits for each frame to be completely been output before "drawing" it to the LCD panel." has a problem. Something is missing after the word completely.

There"s an article titled LCD television, which deals with no particularities of LCD displays featuring TV tuners, numerous sections even dealing explicitly with computer monitors. Perhaps some of the info there is worth merging into this article, but I"d say we have two articles dealing with the same subject of matter. --uKER (talk) 18:28, 28 December 2017 (UTC)

I added {{failed verification}} and {{citation needed}} tags on the two occurrences of the claim that LCDs emit no light of their own. I"m not an expert, but I believe it"s common conventional knowledge that this is correct, however, it"s such a central aspect of the topic that it requires a robust citation. I have a less-than-ideal source for the claim, an article published on FESPA"s website, the qualifier owing to FESPA"s realm of expertise being printing on physical media as opposed to electronics or electromagnetic radiation.

Have added a recent publication in a reputable journal showing that light transmission is controlled by LCDs, without light emission by the screen itself.--BBCLCD (talk) 11:05, 17 March 2020 (UTC)

The ZBD LCD offers ‘infinite multiplexibilty’. There is a distinct threshold between the two states which allows passive matrix addressing of many thousands of lines. This contrasts with many other low power display modes which require a TFT backplane (e.g. Eink EPD, Clearink EPD, electrowetting, electrochromic, phase change).

The technology has been widely deployed in low power electronic shelf edge label products. Since 2019, the ZBD LCD technology has been exclusively owned, manufactured and marketed by New Vision DisplayAubsabs222 (talk) 21:47, 18 May 2020 (UTC)

The 4:3 aspect ratio was common in older television cathode ray tube (CRT) displays, which were not easily adaptable to a wider aspect ratio. When good quality alternate technologies (i.e., liquid crystal displays (LCDs) and plasma displays) became more available and less costly, around the year 2000, the common computer displays and entertainment products moved to a wider aspect ratio, first to the 16:10 ratio. The 16:10 ratio allowed some compromise between showing older 4:3 aspect ratio broadcast TV shows, but also allowing better viewing of widescreen movies. However, around the year 2005, home entertainment displays (i.e., TV sets) gradually moved from 16:10 to the 16:9 aspect ratio, for further improvement of viewing widescreen movies. By about 2007, virtually all mass-market entertainment displays were 16:9. In 2011, 1920 × 1080 (Full HD, the native resolution of Blu-ray) was the favored resolution in the most heavily marketed entertainment market displays. The next standard, 3840 × 2160 (4K UHD), was first sold in 2013.

The first commercial displays capable of this resolution include an 82-inch LCD TV revealed by Samsung in early 2008,PPI 4K IPS monitor for medical purposes launched by Innolux in November 2010.Toshiba announced the REGZA 55x3,

Quarter-QVGA (QQVGA or qqVGA) denotes a resolution of 160 × 120 or 120 × 160 pixels, usually used in displays of handheld devices. The term Quarter-QVGA signifies a resolution of one fourth the number of pixels in a QVGA display (half the number of vertical and half the number of horizontal pixels) which itself has one fourth the number of pixels in a VGA display.

Half-QVGA denotes a display screen resolution of 240 × 160 or 160 × 240 pixels, as seen on the Game Boy Advance. This resolution is half of QVGA, which is itself a quarter of VGA, which is 640 × 480 pixels.

Quarter VGA (QVGA or qVGA) is a popular term for a computer display with 320 × 240 display resolution. QVGA displays were most often used in mobile phones, personal digital assistants (PDA), and some handheld game consoles. Often the displays are in a "portrait" orientation (i.e., taller than they are wide, as opposed to "landscape") and are referred to as 240 × 320.

The name comes from having a quarter of the 640 × 480 maximum resolution of the original IBM Video Graphics Array display technology, which became a de facto industry standard in the late 1980s. QVGA is not a standard mode offered by the VGA BIOS, even though VGA and compatible chipsets support a QVGA-sized Mode X. The term refers only to the display"s resolution and thus the abbreviated term QVGA or Quarter VGA is more appropriate to use.

QVGA resolution is also used in digital video recording equipment as a low-resolution mode requiring less data storage capacity than higher resolutions, typically in still digital cameras with video recording capability, and some mobile phones. Each frame is an image of 320 × 240 pixels. QVGA video is typically recorded at 15 or 30 frames per second. QVGA mode describes the size of an image in pixels, commonly called the resolution; numerous video file formats support this resolution.

While QVGA is a lower resolution than VGA, at higher resolutions the "Q" prefix commonly means quad(ruple) or four times higher display resolution (e.g., QXGA is four times higher resolution than XGA). To distinguish quarter from quad, lowercase "q" is sometimes used for "quarter" and uppercase "Q" for "Quad", by analogy with SI prefixes like m/M and p/P, but this is not a consistent usage.

Wide QVGA or WQVGA is any display resolution having the same height in pixels as QVGA, but wider. This definition is consistent with other "wide" versions of computer displays.

Since QVGA is 320 pixels wide and 240 pixels high (aspect ratio of 4:3), the resolution of a WQVGA screen might be 360 × 240 (3:2 aspect ratio), 384 × 240 (16:10 aspect ratio), 400 × 240 (5:3 – such as the Nintendo 3DS screen or the maximum resolution in YouTube at 240p), 428 × 240 (≈16:9 ratio) or 432 × 240 (18:10 aspect ratio). As with WVGA, exact ratios of n:9 are difficult because of the way VGA controllers internally deal with pixels. For instance, when using graphical combinatorial operations on pixels, VGA controllers will use 1 bit per pixel. Since bits cannot be accessed individually but by chunks of 16 or an even higher power of 2, this limits the horizontal resolution to a 16-pixel granularity, i.e., the horizontal resolution must be divisible by 16. In the case of the 16:9 ratio, with 240 pixels high, the horizontal resolution should be 240 / 9 × 16 = 426.6, the closest multiple of 16 is 432.

WQVGA has also been used to describe displays that are not 240 pixels high, for example, Sixteenth HD1080 displays which are 480 pixels wide and 270 or 272 pixels high. This may be due to WQVGA having the nearest screen height.

WQVGA resolutions were commonly used in touchscreen mobile phones, such as 400 × 240, 432 × 240, and 480 × 240. For example, the Hyundai MB 490i, Sony Ericsson Aino and the Samsung Instinct have WQVGA screen resolutions – 240 × 432. Other devices such as the Apple iPod Nano also use a WQVGA screen, 240 × 376 pixels.

HVGA was the only resolution supported in the first versions of Google Android, up to release 1.5.WVGA resolution on the Motorola Droid or the QVGA resolution on the HTC Tattoo.

It is a common resolution among LCD projectors and later portable and hand-held internet-enabled devices (such as MID and Netbooks) as it is capable of rendering websites designed for an 800 wide window in full page-width. Examples of hand-held internet devices, without phone capability, with this resolution include: Spice stellar nhance mi-435, ASUS Eee PC 700 series, Dell XCD35, Nokia 770, N800, and N810.

Wide XGA (WXGA) is a set of non-standard resolutions derived from the XGA display standard by widening it to a widescreen aspect ratio. WXGA is commonly used for low-end LCD TVs and LCD computer monitors for widescreen presentation. The exact resolution offered by a device described as "WXGA" can be somewhat variable owing to a proliferation of several closely related timings optimised for different uses and derived from different bases.

A common variant on this resolution is 1360 × 768, which confers several technical benefits, most significantly a reduction in memory requirements from just over to just under 1MB per 8-bit channel (1366 × 768 needs 1024.5KB per channel; 1360 × 768 needs 1020KB; 1MB is equal to 1024KB), which simplifies architecture and can significantly reduce the amount–and speed–of VRAM required with only a very minor change in available resolution, as memory chips are usually only available in fixed megabyte capacities. For example, at 32-bit color, a 1360 × 768 framebuffer would require only 4MB, whilst a 1366 × 768 one may need 5, 6 or even 8MB depending on the exact display circuitry architecture and available chip capacities. The 6-pixel reduction also means each line"s width is divisible by 8 pixels, simplifying numerous routines used in both computer and broadcast/theatrical video processing, which operate on 8-pixel blocks. Historically, many video cards also mandated screen widths divisible by 8 for their lower-color, planar modes to accelerate memory accesses and simplify pixel position calculations (e.g. fetching 4-bit pixels from 32-bit memory is much faster when performed 8 pixels at a time, and calculating exactly where a particular pixel is within a memory block is much easier when lines do not end partway through a memory word), and this convention persisted in low-end hardware even into the early days of widescreen, LCD HDTVs; thus, most 1366-width displays also quietly support display of 1360-width material, with a thin border of unused pixel columns at each side. This narrower mode is of course even further removed from the 16:9 ideal, but the error is still less than 0.5% (technically, the mode is either 15.94:9.00 or 16.00:9.04) and should be imperceptible.

When referring to laptop displays or independent displays and projectors intended primarily for use with computers, WXGA is also used to describe a resolution of 1280 × 800 pixels, with an aspect ratio of 16:10.both dimensions vs. the old standard (especially useful in portrait mode, or for displaying two standard pages of text side by side), a perceptibly "wider" appearance and the ability to display 720p HD video "native" with only very thin letterbox borders (usable for on-screen playback controls) and no stretching. Additionally, like 1360 × 768, it required only 1000KB (just under 1MB) of memory per 8-bit channel; thus, a typical double-buffered 32-bit colour screen could fit within 8MB, limiting everyday demands on the complexity (and cost, energy use) of integrated graphics chipsets and their shared use of typically sparse system memory (generally allocated to the video system in relatively large blocks), at least when only the internal display was in use (external monitors generally being supported in "extended desktop" mode to at least 1600 × 1200 resolution). 16:10 (or 8:5) is itself a rather "classic" computer aspect ratio, harking back to early 320 × 200 modes (and their derivatives) as seen in the Commodore 64, IBM CGA card and others. However, as of mid-2013, this standard is becoming increasingly rare, crowded out by the more standardised and thus more economical-to-produce 1366 × 768 panels, as its previously beneficial features become less important with improvements to hardware, gradual loss of general backwards software compatibility, and changes in interface layout. As of August 2013, the market availability of panels with 1280 × 800 native resolution had been generally relegated to data projectors or niche products such as convertible tablet PCs and LCD-based eBook readers.

Widespread availability of 1280 × 800 and 1366 × 768 pixel resolution LCDs for laptop monitors can be considered an OS-driven evolution from the formerly popular 1024 × 768 screen size, which has itself since seen UI design feedback in response to what could be considered disadvantages of the widescreen format when used with programs designed for "traditional" screens. In Microsoft Windows operating system specifically, the larger taskbar of Windows Vista and 7 occupies an additional 16-pixel lines by default, which may compromise the usability of programs that already demanded a full 1024 × 768 (instead of, e.g. 800 × 600) unless it is specifically set to use small icons; an "oddball" 784-line resolution would compensate for this, but 1280 × 800 has a simpler aspect and also gives the slight bonus of 16 more usable lines. Also, the Windows Sidebar in Windows Vista and 7 can use the additional 256 or 336 horizontal pixels to display informational "widgets" without compromising the display width of other programs, and Windows 8 is specifically designed around a "two-pane" concept where the full 16:9 or 16:10 screen is not required. Typically, this consists of a 4:3 main program area (typically 1024 × 768, 1000 × 800 or 1440 × 1080) plus a narrow sidebar running a second program, showing a toolbox for the main program or a pop-out OS shortcut panel taking up the remainder.

XGA+ stands for Extended Graphics Array Plus and is a computer display standard, usually understood to refer to the 1152 × 864 resolution with an aspect ratio of 4:3. Until the advent of widescreen LCDs, XGA+ was often used on 17-inch desktop CRT monitors. It is the highest 4:3 resolution not greater than 220 pixels (≈1.05 megapixels), with its horizontal dimension a multiple of 32 pixels. This enables it to fit closely into a video memory or framebuffer of 1MB (1 × 220 bytes), assuming the use of one byte per pixel. The common multiple of 32 pixels constraint is related to alignment.

WXGA+ (1440 × 900) resolution is common in 19-inch widescreen desktop monitors (a very small number of such monitors use WSXGA+), and is also optional, although less common, in laptop LCDs, in sizes ranging from 12.1 to 17 inches.

There is a less common 1280 × 960 resolution that preserves the common 4:3 aspect ratio. It is sometimes unofficially called SXGA− to avoid confusion with the "standard" SXGA. Elsewhere this 4:3 resolution was also called UVGA (Ultra VGA), or SXVGA (Super eXtended VGA): Since both sides are doubled from VGA the term Quad VGA would be a systematic one, but it is hardly ever used because its initialism QVGA is strongly associated with the alternate meaning Quarter VGA (320 × 240).

SXGA is the most common native resolution of 17-inch and 19-inch LCD monitors. An LCD monitor with SXGA native resolution will typically have a physical 5:4 aspect ratio, preserving a 1:1 pixel aspect ratio.

Any CRT that can run 1280 × 1024 can also run 1280 × 960, which has the standard 4:3 ratio. A flat panel TFT screen, including one designed for 1280 × 1024, will show stretching distortion when set to display any resolution other than its native one, as the image needs to be interpolated to fit in the fixed grid display. Some TFT displays do not allow a user to disable this, and will prevent the upper and lower portions of the screen from being used forcing a "letterbox" format when set to a 4:3 ratio.

SXGA+ stands for Super Extended Graphics Array Plus and is a computer display standard. An SXGA+ display is commonly used on 14-inch or 15-inch laptop LCD screens with a resolution of 1400 × 1050 pixels. An SXGA+ display is used on a few 12-inch laptop screens such as the ThinkPad X60 and X61 (both only as tablet) as well as the Toshiba Portégé M200 and M400, but those are far less common. At 14.1 inches, Dell offered SXGA+ on many of the Latitude C-Series laptops, such as the C640, and IBM since the ThinkPad T21. Sony also used SXGA+ in their Z1 series, but no longer produce them as widescreen has become more predominant.

In desktop LCDs, SXGA+ is used on some low-end 20-inch monitors, whereas most of the 20-inch LCDs use UXGA (standard screen ratio), or WSXGA+ (widescreen ratio).

WSXGA+ stands for Widescreen Super Extended Graphics Array Plus. WSXGA+ displays were commonly used on Widescreen 20-, 21-, and 22-inch LCD monitors from numerous manufacturers (and a very small number of 19-inch widescreen monitors), as well as widescreen 15.4-inch and 17-inch laptop LCD screens like the Thinkpad T61p, the late 17" Apple PowerBook G4 and the unibody Apple 15" MacBook Pro. The resolution is 1680 × 1050 pixels (1,764,000 pixels) with a 16:10 aspect ratio.

UXGA has been the native resolution of many fullscreen monitors of 15 inches or more, including laptop LCDs such as the ones in the IBM ThinkPad A21p, A30p, A31p, T42p, T43p, T60p, Dell Inspiron 8000/8100/8200 and Latitude/Precision equivalents; some Panasonic Toughbook CF-51 models; and the original Alienware Area 51M gaming laptop. However, in more recent times, UXGA is not used in laptops at all but rather in desktop UXGA monitors that have been made in sizes of 20 inches and 21.3 inches. Some 14-inch laptop LCDs with UXGA have also existed (such as the Dell Inspiron 4100), but these are very rare.

The QXGA, or Quad Extended Graphics Array, display standard is a resolution standard in display technology. Some examples of LCD monitors that have pixel counts at these levels are the Dell 3008WFP, the Apple Cinema Display, the Apple iMac (27-inch 2009–present), the iPad (3rd generation), the iPad Mini 2, and the MacBook Pro (3rd generation). Many standard 21–22-inch CRT monitors and some of the highest-end 19-inch CRTs also support this resolution.

QWXGA (Quad Wide Extended Graphics Array) is a display resolution of 2048 × 1152 pixels with a 16:9 aspect ratio. A few QWXGA LCD monitors were available in 2009 with 23- and 27-inch displays, such as the Acer B233HU (23-inch) and B273HU (27-inch), the Dell SP2309W, and the Samsung 2343BWX. As of 2011, most 2048 × 1152 monitors have been discontinued, and as of 2013, no major manufacturer produces monitors with this resolution.

QXGA (Quad Extended Graphics Array) is a display resolution of 2048 × 1536 pixels with a 4:3 aspect ratio. The name comes from it having four times as many pixels as an XGA display. Examples of LCDs with this resolution are the IBM T210 and the Eizo G33 and R31 screens, but in CRT monitors this resolution is much more common; some examples include the Sony F520, ViewSonic G225fB, NEC FP2141SB or Mitsubishi DP2070SB, Iiyama Vision Master Pro 514, and Dell and HP P1230. Of these monitors, none are still in production. A related display size is WQXGA, which is a widescreen version. CRTs offer a way to achieve QXGA cheaply. Models like the Mitsubishi Diamond Pro 2045U and IBM ThinkVision C220P retailed for around US$200, and even higher performance ones like the ViewSonic PerfectFlat P220fB remained under $500. At one time, many off-lease P1230s could be found on eBay for under $150. The LCDs with WQXGA or QXGA resolution typically cost four to five times more for the same resolution. IDTech manufactured a 15-inch QXGA IPS panel, used in the IBM ThinkPad R50p. NEC sold laptops with QXGA screens in 2002–05 for the Japanese market.iPad (starting from 3rd generation and Mini 2) also has a QXGA display.

In June 2001, WQUXGA was introduced in the IBM T220 LCD monitor using a LCD panel built by IDTech. LCD displays that support WQUXGA resolution include: IBM T220, IBM T221, Iiyama AQU5611DTBK, ViewSonic VP2290,Hz and 48Hz, made them less attractive for many applications.

"CMO showcases latest "green" and "innovative" LCD panels". Chi Mei Optoelectronics. 24 October 2008. Archived from the original on 2010-03-13. Retrieved 2008-10-26.

Kwon, Jang Yeon; Jung, Ji Sim; Park, Kyung Bae; Kim, Jong Man; Lim, Hyuck; Lee, Sang Yoon; Kim, Jong Min; Noguchi, Takashi; et al. (2006). "2.2 inch qqVGA AMOLED Drove by Ultra Low Temperature Poly Silicon (ULTPS) TFT Direct Fabricated Below 200°C". SID 2006 Digest. 37 (2): 1358–61. doi:10.1889/1.2433233. S2CID 110488279.

Shin, Min-Seok; Choi, Jung-Whan; Kim, Yong-Jae; Kim, Kyong-Rok; Lee, Inhwan; Kwon, Oh-Kyong (2007). "Accurate Power Estimation of LCD Panels for Notebook Design of Low-Cost 2.2-inch qVGA LTPS TFT-LCD Panel". SID 2007 Digest. 38 (1): 260–263. doi:10.1889/1.2785279. S2CID 109838866.

"ViewSonic Brings World"s Highest Resolution Monitor To Its LCD Lineup" (Press release). ViewSonic. 25 June 2002. Archived from the original on 2002-12-07. Retrieved 2013-05-22.

By default the system is set to support a 3.5" QVGA TFT-LCD (resolution is 240x320 pixels) with integrated touch (part# KLCD-011). This is a TTL-level display.

ProcessDHCP()::DHCP IP Address Resolved as 192.168.3.227, netmask: 255.255.255.0Lease time: 3600 secondsGot Response from DHCP server, IP address: 192.168.3.227No ARP response in 2 seconds, assuming ownership of 192.168.3.227+EbootSendBootmeAndWaitForTftpSent BOOTME to 255.255.255.255Sent BOOTME to 255.255.255.255

The Raspberry Pi 3 can directly be connected to a SPI TFT display via the GPIO pins. This is helpful to build really small devices with all needed components included. The picture below shows a DIN Rail Raspberry Pi Case with a 320x240 TFT display.

To turn off the LCD backlight of Wio Terminal, simply define the LCD Backlight control pin 72Ul and pull it HIGH to turn on and pull it LOW to turn off:

HY-TFT320 is a 3.2 inch TFT LCD Screen module, 320*240 (resolution), 65K color, 34pins interface , not just a LCD breakout, but include the Touch screen, SD card. So it’s a powerful extension module for your project.

This Screen includes a controller SSD1289, it’s 16bit data interface, easy to drive by many MCU like STM32 ,AVR and 8051.HY-TFT320 is designed with a touch controller in it . The touch IC is XPT2046 , and touch interface is included in the 34 pins breakout. Another useful extension in this module is the SD Card socket . It use the SPI mode to operate the SD card, the SPI interface include in the 40pins breakout.

The UTFT library is required to be installed to get this screen model display. This library is especially designed for 3.2” TFT LCD screen using 16 bit mode. The library require the following connections.

Note: The TFT controller model needs to be declared in the initializing statement. ITDB02 myGLCD(38,39,40,41) needs to be modified as myGLCD(38,39,40,41,ITDB32S) when using Arduino Mega2560.ITDB02 myGLCD(19,18,17,16,ITDB32S) needs to be commented when using Aduino UNO. Otherwise it just show a blank screen. In practice, RS, WR, CS, RSET can be connected to any free pin. But the pin number must be in accord with myGLCD(RS,WR,CS,RST).

The LCD has a 3.2" 4-wire resistive touch screen lying over it. The Touch libraryneeds to be installed to get it works. This library is designed for 2.4’’ TFT, 3.2” TFT LCD screen module.

The default setting is accurate for 2.4” TFT module, but you need to calibrate when using 3.2” TFT module. A program to calibrate the touch screen is included in the example. If you touch screen is inaccurate, you need to run touch_calibration. Follow the on-screen instruction to calibrate the touch screen. Better not use your finger to calibrate it, use your accessory touch pen to pressure the frontsight with stength. Then record the calibration parameters and apply them in ITDB02_Touch.cpp in your touch screen library.

TFT01_3.2 is a TFT LCD Screen Module , 40pins interface , not just a LCD break but include the Touch , SD card and Flash design. So it’s a powerful extension module for your project.

TFT01 is designed with a touch controller in it . The touch IC is ADS7843 , and touch interface is included in the 40 pins breakout. We will offer two version of the module, one is with touch screen and touch controller , another is without the touch function, it will just use as a LCD screen for display- so it will be inexpensive than former.

Another useful extension in the TFT01 is the SD Card socket . It use the SPI mode to operate the SD card, the SPI interface include in the 40pins breakout.

There is a reserve extension design in the TFT01 , that’s the external flash . It’s leave the pad and the pins out for the SST25VF016B Flash. So when you need , you can easily add a external flash for your project .

Download the below code. You could used TFT01 Shield v1.0 and TFT-01 Mega Shield v1.1, which for Mega1280 or Mega2560 and there are enough IO for Touch and SD card function .