LCD high contrast technology

by:Kimeery     2021-09-02
After entering 2007, Samsung and LG, as the two major Korean manufacturers, have very eye-catching performance. The contrast ratio of mobile LCDscreen displays from 1400:1, 1600:1, 2000:1, 3000:1, 5000:1 broke through to 10000:1 at once, no matter which way MAGIC contrast or sharp ratio technology is named, it rises in a straight line. The contrast values u200bu200bof ?? have become the most concerned aspect of consumers. And the first Samsung 2232GW+ with a contrast ratio of 10000:1 on the market is actually an independent hero in 2007. The so-called contrast is actually the value obtained by the display manufacturer's test. When the manufacturer is testing, first let the display display white in the full-screen state and measure the brightness value; then display black in the full-screen state and measure the brightness value. The ratio of the two brightness values u200bu200bmeasured before and after is the contrast value advertised by the manufacturer, also called Full ON Full OFF contrast. However, it should be noted that this measurement method is not recognized by the American National Standards Committee ANS, so this full-on and full-off contrast can only be regarded as 'dynamic' contrast. The principle is based on dynamic backlight adjustment, and adjust the backlight brightness according to the brightness of the screen, which is the ultra-high contrast ratio of 10000:1 that Samsung 2232GW+ can achieve. Technical status In theory, if you want to increase the 500:1 contrast ratio of the LCD panel to 2500:1. As long as the full-white brightness image remains unchanged, and the maximum brightness of the full-black screen is reduced to 1/5 of the original, a dynamic 2500:1 contrast ratio can be achieved. If the maximum brightness of the black screen is reduced to 1/10 of the original, then a 5000:1 display will be released. At this time, as long as the dynamic contrast technology is available, the black brightness in the dim scene can be minimized, thereby improving the visual enjoyment. In the high dynamic contrast mode, film applications benefit the most, and the more distinct black and white effects can make it easier for us to distinguish the contrast of the details of the film. Influence Through the comparison of the internal structure of the product, it can be found that the Samsung 2232GW+ with a contrast ratio of 10000:1 and the previous 2232GW with a contrast ratio of 3000:1 are basically the same in workmanship, and even the components and materials of the product are exactly the same. They all use the AUO M220EW01 LCD panel. The ANSI-accepted contrast ratio is 1000:1, the response time is 5ms, and the color gamut is 92%. In other words, Samsung has implanted different drivers in the same IC chip to make the product achieve a lower performance in full black brightness, and then get a higher dynamic contrast. This also shows that as long as the display manufacturer's technology is strong, it can achieve better display effects under the same hardware conditions. Nowadays, manufacturers including Samsung and LG are actively launching products with a contrast ratio of 10000:1, and they have become the best technical representatives of the display market in 2007.
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