모모When we buy a liquid crystal display, we should pay attention to whether the display screen is distorted by brightness. More importantly, the false high brightness will not bring better display effect, it will only make the light-colored image become a vast expanse, but it will not help the dark part performance. Therefore, when you buy, you should see this problem clearly, not the higher the contrast index, the better. There are two ways to change the full white brightness of LCD:By comparison, it can be seen that outdoor lcd display It has certain advantages and great cost performance. https://www.betopview.com/
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모모The first way is to adjust the current of CCFL backlight tube to change the backlight brightness, so as to get different maximum brightness, at this time, the all-black brightness also changes synchronously, which is the most reasonable brightness level mode. At present, most monitors use this brightness level mode.
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모모The second is to adjust the deflection amplitude of liquid crystal molecules. For example, when the contrast of a display is set to 100, the brightness of liquid crystal molecules is 400cd/뻺 when the contrast is set to 50, the maximum deflection amplitude of liquid crystal molecules is only 50%, so the full white brightness is 200cd/뻺, but no matter how the contrast setting is adjusted, the full black brightness remains unchanged, so the adjustment of contrast can get different results.
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모모5-point distance and resolution
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모모Fourth, the point distance and resolution
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모모Point distance refers to the center distance between two adjacent pixels on the screen. The smaller the point distance, the more pixels the display can display on one screen. We can directly calculate the maximum resolution of the display through the point distance: divide the width and height of the display area by the point distance respectively, that is, we can get the maximum number of points that the display can display in the vertical and horizontal directions. Take 1024*768 as an example, it can display at most 1024 points in the horizontal direction and 768 points in the vertical direction, so the limit resolution is 1024*768. Beyond this mode, adjacent pixels on the screen will interfere with each other, but the image changes will be blurred. The smaller the dot distance, the greater the maximum resolution of the display with the same size. At present, high-definition large-screen displays usually use a dot pitch of 0.24mm and 0.25 mm.