projector with tft lcd free sample

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Exquizon E08 TFT-LCD Portable Home Cinema ProjectorLink: https://www.amazon.com/gp/product/B01MDNH8Y5Disclaimer: I was provided a free sample for evaluation ...

Overall, we love the compact portability of the Anker Nebula Capsule II. It was just made to be toted around anywhere you care to go. The built-in Android operating system is what puts it over the top for us. It"s a great thing when you don"t have to plug anything into it to start watching content. If you want something even smaller, we also love the Viewsonic M1+. The long battery life alone sets it apart from most mini projectors. The fact that it was built with portability in mind ratchets it up a level for us.

"Placement, regular maintenance, and transportation are important qualities to extending the lifespan of your projector. Keeping the projector in a relatively dust-free space helps keep the air filter and vents clean. Cleaning your projector’s filter every few months is also important in maintaining the projector’s temperature." — Carlos Regonesi, Senior Product Manager, Epson America Inc.

You"ve probably seen some contrast ratios that look like 1,000:1, or 10,000:1. The contrast ratio is defined as the difference between the brightest color possible and the darkest color possible.  The bigger the difference, the more the projector will differentiate between colors. Lower contrast ratios will result in pictures that look either too dark or washed out. Contrast ratio is denoted as "XXX:1". The higher the first number is, the better.

"When purchasing a projector, shoppers need to be cautious of misleading metrics listed as "Lux," "LED lumens," "Lamp Brightness," or "brightness at the source" that fail to provide useful information about on-screen light output performance." — Carlos Regonesi, Senior Product Manager, Epson America Inc.

One of the benefits you"ll get from a portable projector is the ability to set it down anywhere and go. Batteries ensure you don"t even have to worry about a power source. If you want to get through a movie, look for a battery life that exceeds 2 hours. Obviously, in this case, higher is better, because it gives you more freedom of placement.

Lumens are a measurement of luminous flux, or the observed power of light. ANSI lumens are measured as per the standards set forth by the American National Standards Institute, which means that the light is measured the exact same way every time. It gives you a more exact figure as to how projectors compare with one another. Other measures of lumens are valid, but they"re not as strictly controlled.

Yes! Good projectors will sometimes offer a better picture than a TV would. Plus, it has the benefit of going away when you"re not watching it. You can roll up a screen, or even just cast your projection onto a white wall and not have to worry about a screen. Many projectors, including most of the ones in this list, take the same kinds of inputs as a TV, too.

Hayley Prokos has been writing for Lifewire since 2019, focused on travel-friendly consumer technology. She reviewed several of the portable projectors on this list, including the AAXA P7, ViewSonic M1+, Anker Nebula Capsule II, and others.

Benjamin Zeman has written for Lifewire since 2019 and boasts 20 years of experience in the tech industry. He reviewed the Vankyo Leisure 3, a portable and popular projector.

Eric Watson has years of experience as a freelance reviewer for tech and gaming websites like PC Gamer and Polygon. He"s written for Lifewire since 2019 and reviewed several of the projectors on its list, particularly the Apeman NM4 and Optomo ML750ST.

Whether you received it as a gift this holiday season, or gave it to yourself, congrats on your new projector! There"s no better way to get a massive image for an incredible movie night. Before you pop the popcorn and settle in for quick end-of-year binge of every Marvel movie in order, there"s something you should know: proper placement, and adjustment of a few settings, will make your new projector look it absolute best. Will it work direct from the box? Sure. Will it look better if you take a few minutes to get everything right? Absolutely.

As someone who has used a projector as his main "TV" for over 15 years, not to mention reviewing them professionally even longer, I"ve set up countless projectors. Seriously, I tried counting. I stopped at "a lot."

, and more. It"s also worth taking the time to make sure you"ve removed all the protective film. It"s significantly easier to do anything physical with the projector now compared to when it"s placed or mounted.

If you"re going to sit the projector on a stand or table, it"s also worth checking which of its feet are adjustable. With most projectors only some of the feet screw in and out, which might make getting the image adjusted correctly a bit of a challenge.

If your projector has multiple HDMI inputs, figure out which ones accept the video you want to send. If the rest of your system is 4K compatible, for instance, double-check which input can handle that. With many projectors, only one is

This is counter-intuitive, as you might assume you need to place the projector in line with the center of the screen. This is almost never the case with inexpensive DLP projectors, and usually not the case with inexpensive LCD projectors either. Higher-end LCOS projectors, like those from Sony and JVC, typically have lens shift that allows for a greater range of vertical placement options.

Next is the distance from the screen. Most projectors, other than the short-throw variety, can usually fit a 100-inch screen from a distance of about 10-feet. This can vary, though, and it"s important to verify before you start drilling holes in your ceiling. The zoom range with most projectors is also fairly limited, meaning you"ll only have a few feet of "sweet spot" to fill a specific-sized screen. This info is almost always on the manufacturer"s website for your projector, or in the owner"s manual.

One last piece of placement advice: If you can avoid it, don"t use the built-in keystone adjustment. This is a feature designed to correct a particular placement issue. When your projector isn"t in the center (horizontally) of the screen, or is too high or too low, the image it projects won"t be perfectly rectangular, it will be a trapezoid. A little bit of imperfection is fine since it will probably be unnoticeable from a normal seating distance. Too much, however, and you"ll have image bleed and a weird shape that could be distracting.

The keystone adjustment makes the image rectangular electronically. Don"t do it.Not only does keystone adjustment lower the resolution of the image, since you"re no longer using the entire image-creating chip or chips, but also adds a new layer of video processing that can add quality-reducing artifacts on its own. Or to put it another way, using keystone adjustments on any projector will reduce the image quality of the projector, full stop.

Professional installers build fan-vented cabinets for projectors. If you"re not sure how to do this yourself, perhaps don"t risk it and leave the projector in the open.

Any light in a room that"s not created by the projector is going to reduce image quality. Even if you have a fancy light-rejecting screen, ambient light is bad and you"re going to want to do everything you can to reduce it.

The biggest culprit is the sun. If you"re planning on watching TV during the day, you"re going to need to cut down the light in the room. Even if your projector does OK during the day when you buy it, the lamp is only going to get dimmer over time. In a few years, you"re going to need to buy curtains to see anything, so you might as well get them now. If your spouse doesn"t like the look of blackout curtains, any heavy curtains or shades will help. If you"re watching a lot of content during the day, a projector might not be the best primary option anyway. So for those occasional mid-day movie marathons, sporting events, etc, anything that cuts down the glare should work.

Even expensive projectors leak light somewhere other than where you want it. With inexpensive projectors, this is often a squarish halo of light spilled around the screen. There"s not much you can easily do about it, and it"s quite common. It"s why most theaters have the area around the screen painted black.

With a motorized focus, stand up at the screen and slowly adjust until you can see the individual pixels. It"s possible they"ll be too small to see, depending on the size of your screen, the resolution of the projector, and your eyesight. You should be able to make out the darker outlines, however. Adjust the best you can, but ideally each pixel will be obvious when you"re standing at the screen. Sometimes, even with high-end projectors, the adjustments will be too coarse to get perfect. Don"t stress about it. As long as you"re close it should look fine when you"re seated. If your projector is on a stand, you could experiment with nudging it backward a fraction of an inch, if the focus is in between one of its steps.

I once used binoculars to get the focus correct on a particularly long-throw, high-resolution projector, but I doubt most of you will need to resort to this, not least because you"ll look as ridiculous as I did.

Depending on the projector, it"s possible not every part of the image will be in focus at the same time -- that"s one downside to low-cost lenses. As you can see in the image of the menu in the next section, there are some halos around the letters. That"s another side-effect of low-price optics.

The most important settings specific to projectors have to do with the lamp. Inside most projectors is some kind of super-bright light bulb, called a lamp. A handful of projectors use LEDs or lasers

If you have a smaller screen, only watch at night, or want to save some money in the long run, you can dial back the brightness. Often this is called Eco mode, but the change will be very noticeable regardless what it"s called on your projector. Dimmer lamp modes are usually quieter as well, as the fans don"t have to work as hard.

There"s also commonly a dynamic brightness mode that runs the lamp at 100% during bright scenes, and then makes it dimmer during darker scenes. Usually this mode offers even longer lamp life, but this ramping up and down of the light might be visible. With some projectors the fans getting faster and slower is noticeable as well.

Some projectors have an automatic iris. This works similarly to the dynamic brightness mode, but the lamp doesn"t change. Instead, a mechanical iris dims the image during dark scenes. How well these work varies greatly. Some people don"t mind them, others find it annoying. There isn"t as much of a payoff, however, like the longer lamp life of the dynamic brightness lamp mode.

Now that you"ve got everything set up and running, there are a few "best practices" to keep in mind with a projector that are different from a TV. They all center around the lamp.

A traditional UHP projector lamp is a fragile thing. Electricity sparks across two electrodes. This creates the light you see. Over time, the electrodes degrade, sort of like how a candle"s wick burns away. Eventually, they"ll be too far apart for the arc to form, and the lamp is dead. No picture for you.

In another counter-intuitive aspect of projector ownership, it"s better leaving it on instead of turning it on and off multiple times in a row. There"s no hard rule, but multiple restarts in a single night is bad for lamp life. Leaving it on might be better. For what it"s worth, since I use my projector as the main "TV" in my home, it runs for many hours every night. I routinely get many, many more hours out of a lamp than what it"s rated.

How strict you want to be with this is up to you because, as I said, there"s no hard rule. I"d generally say if the projector is still warm when you want to use it again, you shouldn"t have turned it off in the first place. Turn it off when you"re done, of course. Don"t sweat it if you accidentally turn it off and then want to watch one more episode. If you"re doing that every night, that"s not great. Just something to keep in mind, and the minds of anyone else who uses the projector.

Also, never ever unplug a projector when it"s on, or even when it"s off and cooling down. Most projectors will run their fans for a few minutes to gently cool down the lamp. Pulling the plug doesn"t allow this gentle cooldown and is also bad for the lamp.

Of course, you"re going to need a new lamp eventually. Depending on the projector, your settings and how you use it, this will be a few years away on the short side, perhaps many years away on the long side. This is just the cost of ownership, like owning a disposable razor or getting an oil change in your car. For the most part, lamps aren"t outrageously expensive compared to the price of the projector. This isn"t printer ink.

Though finding what lamp your projector needs isn"t hard, it might be worth writing the exact model and writing it somewhere you won"t lose. On the bottom of the projector maybe.

As tempting as it is to find a cheap "knock-off" lamp to save some money, beware. If you find a lamp that"s significantly cheaper than the rest, it"s probably for a reason. They might not perform as well as the real thing. One friend who also uses a projector full-time replaced his old and dim lamp for a cheap no-name version. I measured the brightness of the many-thousand-hour old lamp, then measured the brightness of the brand new zero-hour lamp. The new lamp was actually dimmer than the worn-out old one. Yeah, that"s not great.

If possible, buy the lamp through the projector manufacturer"s website, or via retailers they recommend. Sometimes that"s not possible, in which case use your best judgment. If all the options for your lamp are $150 on Amazon, and a random website has one for $60, I"d avoid the $60 option.

He wrote a bestselling sci-fi novel about city-size submarines, along with a sequel. You can follow his adventures on Instagram and his YouTube channel.

A thin-film-transistor liquid-crystal display (TFT LCD) is a variant of a liquid-crystal display that uses thin-film-transistor technologyactive matrix LCD, in contrast to passive matrix LCDs or simple, direct-driven (i.e. with segments directly connected to electronics outside the LCD) LCDs with a few segments.

In February 1957, John Wallmark of RCA filed a patent for a thin film MOSFET. Paul K. Weimer, also of RCA implemented Wallmark"s ideas and developed the thin-film transistor (TFT) in 1962, a type of MOSFET distinct from the standard bulk MOSFET. It was made with thin films of cadmium selenide and cadmium sulfide. The idea of a TFT-based liquid-crystal display (LCD) was conceived by Bernard Lechner of RCA Laboratories in 1968. In 1971, Lechner, F. J. Marlowe, E. O. Nester and J. Tults demonstrated a 2-by-18 matrix display driven by a hybrid circuit using the dynamic scattering mode of LCDs.T. Peter Brody, J. A. Asars and G. D. Dixon at Westinghouse Research Laboratories developed a CdSe (cadmium selenide) TFT, which they used to demonstrate the first CdSe thin-film-transistor liquid-crystal display (TFT LCD).active-matrix liquid-crystal display (AM LCD) using CdSe TFTs in 1974, and then Brody coined the term "active matrix" in 1975.high-resolution and high-quality electronic visual display devices use TFT-based active matrix displays.

The liquid crystal displays used in calculators and other devices with similarly simple displays have direct-driven image elements, and therefore a voltage can be easily applied across just one segment of these types of displays without interfering with the other segments. This would be impractical for a large display, because it would have a large number of (color) picture elements (pixels), and thus it would require millions of connections, both top and bottom for each one of the three colors (red, green and blue) of every pixel. To avoid this issue, the pixels are addressed in rows and columns, reducing the connection count from millions down to thousands. The column and row wires attach to transistor switches, one for each pixel. The one-way current passing characteristic of the transistor prevents the charge that is being applied to each pixel from being drained between refreshes to a display"s image. Each pixel is a small capacitor with a layer of insulating liquid crystal sandwiched between transparent conductive ITO layers.

The circuit layout process of a TFT-LCD is very similar to that of semiconductor products. However, rather than fabricating the transistors from silicon, that is formed into a crystalline silicon wafer, they are made from a thin film of amorphous silicon that is deposited on a glass panel. The silicon layer for TFT-LCDs is typically deposited using the PECVD process.

Polycrystalline silicon is sometimes used in displays requiring higher TFT performance. Examples include small high-resolution displays such as those found in projectors or viewfinders. Amorphous silicon-based TFTs are by far the most common, due to their lower production cost, whereas polycrystalline silicon TFTs are more costly and much more difficult to produce.

The twisted nematic display is one of the oldest and frequently cheapest kind of LCD display technologies available. TN displays benefit from fast pixel response times and less smearing than other LCD display technology, but suffer from poor color reproduction and limited viewing angles, especially in the vertical direction. Colors will shift, potentially to the point of completely inverting, when viewed at an angle that is not perpendicular to the display. Modern, high end consumer products have developed methods to overcome the technology"s shortcomings, such as RTC (Response Time Compensation / Overdrive) technologies. Modern TN displays can look significantly better than older TN displays from decades earlier, but overall TN has inferior viewing angles and poor color in comparison to other technology.

Most TN panels can represent colors using only six bits per RGB channel, or 18 bit in total, and are unable to display the 16.7 million color shades (24-bit truecolor) that are available using 24-bit color. Instead, these panels display interpolated 24-bit color using a dithering method that combines adjacent pixels to simulate the desired shade. They can also use a form of temporal dithering called Frame Rate Control (FRC), which cycles between different shades with each new frame to simulate an intermediate shade. Such 18 bit panels with dithering are sometimes advertised as having "16.2 million colors". These color simulation methods are noticeable to many people and highly bothersome to some.gamut (often referred to as a percentage of the NTSC 1953 color gamut) are also due to backlighting technology. It is not uncommon for older displays to range from 10% to 26% of the NTSC color gamut, whereas other kind of displays, utilizing more complicated CCFL or LED phosphor formulations or RGB LED backlights, may extend past 100% of the NTSC color gamut, a difference quite perceivable by the human eye.

The transmittance of a pixel of an LCD panel typically does not change linearly with the applied voltage,sRGB standard for computer monitors requires a specific nonlinear dependence of the amount of emitted light as a function of the RGB value.

Initial iterations of IPS technology were characterised by slow response time and a low contrast ratio but later revisions have made marked improvements to these shortcomings. Because of its wide viewing angle and accurate color reproduction (with almost no off-angle color shift), IPS is widely employed in high-end monitors aimed at professional graphic artists, although with the recent fall in price it has been seen in the mainstream market as well. IPS technology was sold to Panasonic by Hitachi.

IPS has since been superseded by S-IPS (Super-IPS, Hitachi Ltd. in 1998), which has all the benefits of IPS technology with the addition of improved pixel refresh timing.

Less expensive PVA panels often use dithering and FRC, whereas super-PVA (S-PVA) panels all use at least 8 bits per color component and do not use color simulation methods.BRAVIA LCD TVs offer 10-bit and xvYCC color support, for example, the Bravia X4500 series. S-PVA also offers fast response times using modern RTC technologies.

A technology developed by Samsung is Super PLS, which bears similarities to IPS panels, has wider viewing angles, better image quality, increased brightness, and lower production costs. PLS technology debuted in the PC display market with the release of the Samsung S27A850 and S24A850 monitors in September 2011.

TFT dual-transistor pixel or cell technology is a reflective-display technology for use in very-low-power-consumption applications such as electronic shelf labels (ESL), digital watches, or metering. DTP involves adding a secondary transistor gate in the single TFT cell to maintain the display of a pixel during a period of 1s without loss of image or without degrading the TFT transistors over time. By slowing the refresh rate of the standard frequency from 60 Hz to 1 Hz, DTP claims to increase the power efficiency by multiple orders of magnitude.

Due to the very high cost of building TFT factories, there are few major OEM panel vendors for large display panels. The glass panel suppliers are as follows:

External consumer display devices like a TFT LCD feature one or more analog VGA, DVI, HDMI, or DisplayPort interface, with many featuring a selection of these interfaces. Inside external display devices there is a controller board that will convert the video signal using color mapping and image scaling usually employing the discrete cosine transform (DCT) in order to convert any video source like CVBS, VGA, DVI, HDMI, etc. into digital RGB at the native resolution of the display panel. In a laptop the graphics chip will directly produce a signal suitable for connection to the built-in TFT display. A control mechanism for the backlight is usually included on the same controller board.

The low level interface of STN, DSTN, or TFT display panels use either single ended TTL 5 V signal for older displays or TTL 3.3 V for slightly newer displays that transmits the pixel clock, horizontal sync, vertical sync, digital red, digital green, digital blue in parallel. Some models (for example the AT070TN92) also feature input/display enable, horizontal scan direction and vertical scan direction signals.

New and large (>15") TFT displays often use LVDS signaling that transmits the same contents as the parallel interface (Hsync, Vsync, RGB) but will put control and RGB bits into a number of serial transmission lines synchronized to a clock whose rate is equal to the pixel rate. LVDS transmits seven bits per clock per data line, with six bits being data and one bit used to signal if the other six bits need to be inverted in order to maintain DC balance. Low-cost TFT displays often have three data lines and therefore only directly support 18 bits per pixel. Upscale displays have four or five data lines to support 24 bits per pixel (truecolor) or 30 bits per pixel respectively. Panel manufacturers are slowly replacing LVDS with Internal DisplayPort and Embedded DisplayPort, which allow sixfold reduction of the number of differential pairs.

Backlight intensity is usually controlled by varying a few volts DC, or generating a PWM signal, or adjusting a potentiometer or simply fixed. This in turn controls a high-voltage (1.3 kV) DC-AC inverter or a matrix of LEDs. The method to control the intensity of LED is to pulse them with PWM which can be source of harmonic flicker.

With analogue signals like VGA, the display controller also needs to perform a high speed analog to digital conversion. With digital input signals like DVI or HDMI some simple reordering of the bits is needed before feeding it to the rescaler if the input resolution doesn"t match the display panel resolution.

Kawamoto, H. (2012). "The Inventors of TFT Active-Matrix LCD Receive the 2011 IEEE Nishizawa Medal". Journal of Display Technology. 8 (1): 3–4. Bibcode:2012JDisT...8....3K. doi:10.1109/JDT.2011.2177740. ISSN 1551-319X.

K. H. Lee; H. Y. Kim; K. H. Park; S. J. Jang; I. C. Park & J. Y. Lee (June 2006). "A Novel Outdoor Readability of Portable TFT-LCD with AFFS Technology". SID Symposium Digest of Technical Papers. AIP. 37 (1): 1079–82. doi:10.1889/1.2433159. S2CID 129569963.

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