Liquid crystal principle briefly
Liquid crystal is the use of liquid crystals in the role of voltage deflection principle. As the liquid crystal that makes up the screen can display red, green and blue at the same point, or a point of liquid crystal is superimposed by three points, which are arranged in a certain order, through the voltage to stimulate these liquid crystals, you can present different colors, different ratios of collocation can be presented in a thousand different colors. Liquid crystal itself is not light-emitting, it relies on the backlight tube to light, so the liquid crystal screen depends on the backlight tube. As the liquid crystal using point imaging reasons, so the screen inside the composition of the more points, the more fine imaging effect, the vertical and horizontal points constitute the resolution of the LCD TV, the higher the resolution, the better the effect. Currently used for LCD splicing curtain wall screen more advanced is mainly DID TFT LCD LCD screen. DID (Digital Infomation Display) TFT (Thin-Film Transistor) LCD (Liquid Crystal Display) is a special product LCD screen. It is based on the application of security, broadcasting and television, medical, industrial and public **** media release and other areas of the industry to monitor the technical requirements of the design and production, is the fourth generation of LCD products following NB, PC to TV. Its excellent display performance, has become the current highest-end people agree, the most ideal LCD monitor display. DID TFT LCD LCD screen has a high brightness, high contrast, better color saturation, a wider viewing angle, better reliability, pure plane display, brightness uniformity, image stability and no flicker, 120HZ times the refresh frequency, longer service life and other characteristics. Specifically, it has the following outstanding features:
- High brightness
Compared with TV and PC LCD screen, DID LCD screen has higher brightness, the brightness of TV or PC LCD screen is generally only 250-300 cd/m2 (≤ 20.1") and 400-500 cd/m2 (≥ 26"), while the brightness of TV or PC LCD screen is only 250-300 cd/m2 (≤ 20.1") and 400-500 cd/m2 (≥ 26"). "), while DID LCD screens can reach 300~500 cd/m2 (≤ 20.1") and 700~800 cd/m2 (≥ 26").
- High Contrast Ratio
DID LCD has a contrast ratio of 1000:1 (<=20.1") 1500:1 (≥ 26"), which is more than double that of a traditional PC or TV LCD, and triple that of a typical Rear Projection.
- Better color saturation
Currently, the color saturation of ordinary LCD and CRT is only 72%, while DID LCD can achieve a high color saturation of 92%, thanks to DID's newly developed color calibration technology, through which, in addition to color calibration of the static picture, it can also be used to calibrate the color of the moving picture, which ensures the precise and stable picture output.
- Wider Viewing Angle
PVA (Patterned Vertical Alignment) technology, or "Patterned Vertical Alignment", utilizes a viewing angle of over 170° (horizontal and vertical).
- Better Reliability
Ordinary LCD panels are designed for TVs and PC monitors, and do not support continuous day and night use; DID LCD panels are designed for monitors and billboards, and support continuous day and night use in public.
- Pure Flat Panel Display
LCD is the representative of flat panel display device, it is the real pure flat panel display, completely no curvature big picture, no distortion distortion.
- Uniform brightness, stable image without flickering
Since LCD every point in the received signal has been to maintain that color and brightness, unlike CRT that need to constantly refresh the bright spot. As a result, LCDs are uniformly bright, have high picture quality, and are absolutely flicker-free.
- 120Hz Frequency Refresh Rate
The patented 120Hz Frequency Refresh Rate LCD technology effectively solves the problem of image trailing and blurring during rapid image movement, enhances the clarity and contrast of the image, and makes the picture clearer and less fatiguing to the human eye when viewing for long periods of time.
- Longer service life
Ordinary NB, PC and TV use LCD LCD backlighting service life of 10,000 to 30,000 hours, while the DID LCD backlighting service life of up to 50,000 hours or more, which ensures that each piece of splicing curtain wall used in the long term use of the brightness, contrast and chromaticity of the consistency and to ensure that the service life of the curtain wall is not less than 50,000 hours. The service life of the curtain wall is not less than 50,000 hours.
- Ultra-thin and narrow design
DID LCD screen has a large display area at the same time, there is a thin thickness, light weight and other advantages, can be easily spliced, installation. General 40-inch DID LCD, its weight is only 12.5KG, the thickness of less than 10 centimeters, splicing special LCD screen, its excellent narrow-edge design, so that the edge of only 1 centimeter, relative to the 40-inch screen, so small edge does not affect the overall display effect of the curtain wall. Plasma screen splicing display wall
Plasma:
Before understanding the principle of plasma display, we first have to understand --- Plasma / plasma, when the inert gas reaches a certain temperature, the gas internal electron fully ionized, when the number of positive ions (+), free electrons (-) is basically the same, plus a small number of non-electrically charged neutral particles, the gas is known as the Plasma. Plasma has good electrical conductivity.
A brief analysis of the principle of plasma
A plasma display is a display device that utilizes a gas discharge to emit light, and its principle of operation is very similar to that of a fluorescent lamp. It uses a plasma tube as the light-emitting element, each plasma tube on the screen corresponds to a pixel, the screen to the glass as a substrate, the substrate is spaced a certain distance to form a discharge space. Discharge space filled with neon, xenon and other inert gas mixture as a working medium, in the two glass substrate on the inside surface coated with metal oxide conductive film as an incentive electrode. When adding voltage to the electrode, the gas mixture in the discharge space will occur plasma discharge phenomenon, also known as plasma effect. Plasma discharge produces ultraviolet light, ultraviolet light excitation coated with red, green and blue phosphor phosphor phosphor screen, the phosphor screen emits visible light, showing the image. Advantages: bright colors, high brightness, high contrast; Disadvantages: power consumption and heat is very large, serious burning phenomenon, the picture quality decreases over time. Plasma TV display features
High resolution Compared with traditional CRT TVs, PDP TVs have a higher resolution.PDP can display computer signals with resolutions such as XGA, SVGA, and VGA, as well as DTV or high-definition HDTV signals.
Flicker-free pictureTraditional CRT tubes utilize an electron beam to scan the fluorescent layer, which excites the fluorescent body to emit light, resulting in flickering and visible scan lines due to scanning frequency limitations.PDP is controlled by independent electrodes for each pixel point and is equipped with a double scanning circuitry, so that it can present a fine and perfect picture even with normal TV signals or VCR tapes.
Precise color reproduction capabilityHigh-end plasma displays can typically display up to 16.77 million colors or more, providing a perfect color gradation, complemented by a rich grey scale, to deliver a fuller, more vibrant picture.
Wide-screen display mode plasma monitors have a screen ratio of 16:9 instead of the traditional 4:3, which is intended for users to enjoy most DVD titles as well as to display future HDTV (Picture Ratio 16:9) signals. Of course, you can also view regular TV program signals by selecting the 4:3 format.
The PDP Plasma Display is a true flat panel display. The big picture is completely curvature-free, and even the corners are free of distortion.
Uniform brightness Most other mainstream display technologies have uneven screen brightness (e.g. projection, LCD, CRT, etc.), while due to the unique display principle of PDP, the brightness of plasma displays is very uniform, and there will not be any darkening of the corners.
Ultra-thin body design PDP has a large display area at the same time, the body is ultra-thin, easy to place in any place and location. General plasma display body thickness of only 8)11cm, 42 "plasma machine weight is only about 30Kg. The advantages of ultra-light and ultra-thin plasma displays make plasma displays the best equipment for indoor large-screen displays.
Ultra-wide viewing angle due to the PDP itself with a light source, without the need for external light to light, this active light-emitting properties of the PDP's viewing angle is extremely wide, in the horizontal and vertical sides of the upward are higher than 160 degrees.