lcd displays ppt brands

Traditional Displays Most used a cathode-ray tube as a display device in 20 century. CRT: Glass tube that is narrow at one end and opens to a flat screen at the other end. Narrow end contains electron guns. Single gun for monochrome and three guns for color. Display screen is covered with tiny phosphor dots that emit light when struck by the electron gun.

Using technology that was developed in the20thcentury. LCD LCD monitors are very popular due to low manufacturing costs. Light, sleek, energy-efficient, have sharp picture.

History of Displays In 1888 Friedrich Reinitzer discovers the liquid crystalline properties of cholesterol from carrots that is responsible for the generation of colors at the two melting points of the cholesterol. In 1936 the Marconi Wireless Telegraph company places a patent on The Liquid Crystal Light Valve, which is the first practical application of Liquid Crystal technology. In 1962 Richard Williams of the RCA discovered the electro-optic properties of liquid crystals. He found out that when an electrical current is sent through a thin layer of liquid crystals stripe-patterns form an optical effect of emitting various colors. This effect inside the liquid crystal is later called “Williams domains”.

Introduction to LCD In a color LCD, each pixel is comprised of a red, green and blue sub pixel, each with its own color filter. Colors are produced by applying a small voltage at each sub pixel to vary the intensity of red, green, or blue light to pass through it. This causes a color picture to be displayed on the LCD. It does this independently for each of many tiny areas (pixels) on the screen. An LCD controls light from a backlight or form surrounding : it does not emit light. Sub pixels can change fast enough to allow moving pictures to be displayed. This changing rate is called refresh rate.

Colored Lcd Each row of sub pixels has its own narrow color filter stripe - red, green and blue. You can see these with a x30 magnifier on a laptop, or TV, LCD screen. If all the sub pixels in an area are bright, then we see white there. If they are dark, we see black. Sub pixels are too small to see individually by eye, so their colors mix . We see colors that depend on the brightness"s of adjacent R, G & B sub pixels. Each LCD sub pixel is controlled by a voltage (applied using conductors you can see through) to create the right amounts of R, G & B for each part of the display.

All materials are comprised of vast numbers of tiny particles (molecules) It is basically another state of matter which behaves both as liquids and solids. A liquid crystal has rod-like particles that all point in the same direction (more or less) In an LCD, the thin layer of material used will remain a liquid crystal over a wide temperature range (typically from -20oC to +80oC) Note that a liquid crystal is not solid, liquid or gas. It is an additional phase of matter. It has unusual optical properties, but these can normally only be seen using Polarizer

If ~3Vac is applied to its conductors. The LCD becomes black. See Figure 1 When the 3Vac is removed, the LCD becomes clear after a short delay. If the polarisers are parallel the LCD goes from black to clear. See Figure 2 LC Shutter LC Shutter Crossed Parallel ON ON Figure 1 Figure 2

In an LCD, it is used in a thin layer (~0.005 mm thick) between glass plates, when it appears transparent Surface coatings on the plates make its rod-like particles twist by 90o through the layer The LCD changes its optical properties when a small voltage is applied to clear conducting layers (made of Indium Tin Oxide, ITO), on the inside surface of each plate. This voltage is always AC, since DC voltage (e.g. from a battery) would damage the LCD. Applying the voltage realigns the tiny particles perpendicular to the plates The resulting optical change can only be seen using polarisers, as shown

Between 0V and 3Vac, a graph of the light intensity against voltage shows that grays are observed above ~ 1V threshold. Graph of Transmitted Light Intensity against Voltage applied to an LCD with Crossed Polarisers white Transmitted Light Intensity (Lux) black 1V 2V 3V LCD Voltage

Passive -matrix addressed Active-matrix addressed Small monochrome displays such as those found in personal organizers, or older laptop screens have a passive-matrix structure 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. 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. 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. 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.

Twisted Nematic(TN) Twisted nematic displays contain liquid crystal elements which twist and untwist at varying degrees to allow light to pass through. When no voltage is applied to a TN liquid crystal cell, the light is polarized to pass through the cell. In proportion to the voltage applied, the LC cells twist up to 90 degrees changing the polarization and blocking the light"s path. By properly adjusting the level of the voltage almost any grey level or transmission can be achieved.

In-plane switching is an LCD technology which aligns the liquid crystal cells in a horizontal direction. In this method, the electrical field is applied through each end of the crystal, but this requires two transistors for each pixel instead of the single transistor needed for a standard thin-film transistor (TFT) display. With older versions of IPS, before LG Enhanced IPS was introduced in 2009, the additional transistor resulted in blocking more transmission area, thus requiring a brighter backlight, which consumed more power, and made this type of display less desirable for notebook computers. This technology can be found in the Apple iMac and iPad as well as the Hewlett-Packard EliteBook 8740w.

AFFS is developed by HYDIS TECHNOLOGIES CO.LTD, Korea (formally Hyundai Electronics, LCD Task Force). AFFS-applied notebook applications minimize color distortion while maintaining its superior wide viewing angle for a professional display. Color shift and deviation caused by light leakage is corrected by optimizing the white gamut which also enhances white/grey reproduction.

Vertical Alignment Vertical alignment displays are a form of LCDs in which the liquid crystal material naturally exists in a vertical state removing the need for extra transistors (as in IPS). When no voltage is applied, the liquid crystal cell remains perpendicular to the substrate creating a black display. When voltage is applied, the liquid crystal cells shift to a horizontal position, parallel to the substrate, allowing light to pass through and create a white display. VA liquid crystal displays provide some of the same advantages as IPS panels, particularly an improved viewing angle and improved black level.

Blue Phase Mode Blue phase LCDs do not require a liquid crystal top layer. Blue phase LCDs are relatively new to the market,and very expensive because of the low volume of production. They provide a higher refresh rate than normal LCDs, but normal LCDs are still cheaper to make and actually provide better colors and a sharper image.

Drawbacks Although LCDs typically have more vibrant images and better "real-world" contrast ratios (the ability to maintain contrast and variation of color in bright environments) than CRTs, they do have lower contrast ratios than CRTs in terms of how deep their blacks are. LCDs typically have longer response times than their plasma and CRT counterparts. LCDs appear to exhibit motion blur as the human eye follows moving objects, where some CRT screens do not. LCD panels using TN tend to have a limited viewing angle relative to CRT and plasma displays. Consumer LCD monitors tend to be more fragile than their CRT counterparts. Dead pixels can occur when the screen is damaged or pressure is put upon the screen. The cold cathode fluorescent lamps typically used for back-lights in LCD screens contain mercury, a toxic substance, though LED-backlit LCD screens are mercury-free. Pattern based flicker, caused by imperfect voltage balance.

Twisted nematic displays rotate the director of the liquid crystal by 90 degrees , but super-twisted nematic displays employ up to a 270 degrees rotation. This extra rotation gives the crystal a much steeper voltage-brightness response curve and also widens the angle at which the display can be viewed before losing much contrast. With the sharper response, it is possible to achieve higher contrast with the same voltage selection ratio. Therefore, the degree to which multiplexing is possible is greatly increased. The largest common super-twist displays have up to 500 rows.

The surface-stabilized ferroelectric liquid crystal display shows great promise. It uses chiral smectic liquid crystal---a type in which the director rotates around a cone of directions 22.5 degrees from the perpendicular of the layers. The hope is to make the film so thin that the director will not rotate. The planar layers are perpendicular to the glass plates of the display. Surface-stabilized ferroelectric displays have the distinct advantage that switching speeds are very high since electric field is necessary for both turning a pixel on and for turning it off.

Choosing the best presentation display for your business’s meeting spaces can be overwhelming. With so many different options ranging from projectors all the way to 163” video wall displays, finding the best solution can take time.

This is why we’ve created this comprehensive guide to all types of presentation displays commonly used for meeting spaces in business settings. If you are ready for a great investment in your business, you might want to read our complete strategies for business solutions.

Using presentation display systems such as projectors, wireless presentation displays, and interactive flat-panel displays are the best solutions to consider if you want to create a more collaborative and engaging meeting space.

Learning about the different usages for different types of displays, their pros, and their cons, will help you make an informed investment for your business.

Interactive flat-panel displays are large-format touchscreens displays. They are like wireless presentation displays but offer built-in software for high levels of collaboration and brainstorming. The advanced touchscreen interactivity is perfect for all types of meeting spaces.

Using interactive flat-panel displays creates more collaborative workspaces with improved convenience and higher-performing productivity. They are even great for huddle spaces. However, these displays can be more difficult to operate which might present a learning curve for those who are not as tech-savvy. Not to mention that some boards do not come with installed software, causing incompatibility issues later.

Interactive flat-panel displays (IFPDs) are perfect for meeting spaces of various sizes looking to make the upgrade. IFPDs are for those who want to connect not only in the office but also with remote coworkers. Thanks to the technology that allows for writing, editing, and other collaborative features, you can make any meeting more engaging and productive.

ViewSonic’s interactive flat-panel displays, called ViewBoards, are perfect for those wanting to make the switch to IFPDs. And for any business use, we recommend our flagship ViewBoard: the IFP70.

Wireless presentation displays are hardware solutions for integrating multiple other devices into a single wireless system. Oftentimes these WPSs are external boxes that connect multiple devices, but standard wireless presentations have them built-in. This allows for an easy and cableless connection for all devices involved.

Wireless presentation displays are wireless all-in-one presentation displays. These also allow for screen sharing and integrated multimedia display. They also do not require dongles or app installation and provide you with instant casting just by using opening a browser.

These are perfect for meeting spaces with high levels of sharing involved inside or outside. Wireless presentation displays, or WPD, for short, are also great for businesses that have remote participants, and even commercial screens. It is easy to connect single content to all displays for effective multi-group environments.

Mobilityis one of the main pros of having a WPD. Despite the awesome cordless option, this also means you can easily move these displays to other areas of your business. You can either have them mounted to the wall, placed on a trolley, or have an e-poster system for even more mobility of the display.

If you feel like touch screens and more interactive meetings are needed for your conference room, refer back to our interactive flat panel displays to see if there is a better option for you!

Priceis always one of the most important factors to consider. Projectors are typically cheaper than other types of presentation displays. However, budget-friendly should not mean lower quality and bad functionality.

Videowall displays are often multi-monitor sets that consist of many different parts put together to create one very large screen. Because of this multi-monitor setup, you can often see the bezels between each screen.

Direct View LED displays are some of the most impressive displays offered at ViewSonic. While they are not interactive, they are great for commercial displays as well as for investing in something nice and beautiful for the business. They are also perfect for cost-effective, all-in-one video wall solutions, and large venue solutions.

Picking the perfect presentation display solution for your meeting space has never been easier. With projectors, wireless presentation displays, interactive flat panel displays, large-scale video wall displays, and so much more on the way, there is bound to be something for your office.

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The official Missouri S&T PowerPoint templates come in 16:10 and 16:9 screen ratio (for LCD monitors and cinematic format, such as Leach Theatre’s projector) and 4:3 (for projectors and lower-resolution purposes). Some of the templates use the font Orgon, which is installed on all registered computers on campus. Others require Tungsten font (request it here). Be sure to use the correct template for the project that will be used, not the screen you are working from.

Besides increase social media engagement, your digital signs also help build trust and credibility, which are essential for sustained business growth. When your clients see their views aired on the huge displays in your lobby, they will feel that you value their input, thus increasing loyalty. Combining better social media engagement with loyalty is highly lucrative for any business.

A welcoming screen is one of the best tools you can use for engaging potential clients into taking positive action. The best thing about using these digital signs is that they do most of the marketing work for you, prompting your clients to take positive action in a reliable and consistent way. These displays attract the audience and get them talking about your business or products in a positive way or even to give your brand valuable feedback.

Every second that passes by when potential clients are in your business premises is very precious. The welcoming displays can help you improve people’s experiences with your brand. This can be through rewarding those who promote your content, effectively upselling your products or services and also generally entertaining your audience.