Contrast and brightness of LCD module

Contrast of liquid crystal display module

The control IC that liquid crystal panel chooses when manufacturing, filter and directional film wait for fittings, concern with the contrast of panel, to average user character, contrast ratio can achieve 350:1 enough, but in professional domain such contrast level still cannot satisfy the demand of user.CRT displays can easily achieve 500:1 or higher contrast.Only high-end LCD display can achieve such a degree, because the contrast is difficult to accurately measure through the instrument, so choose or to see it in person.

Tip: contrast is very important, can be said to be selected it is more important than the spot index of the liquid crystal, when you know your customer buy DVDS, LCD is used for entertainment you can emphasize contrast is more important than no bad points, we were watching streaming media, the general sources of brightness is not big, but to see the character scene contrast, the simple sense of human hair grey to black, shall appear on high and low contrast. Viewsonic VG and VX has stressed contrast indicators, VG910S is 1000:The contrast ratio of 1 was compared with that of a samsung dual-head graphics card, and samsung LCD was obviously better than it, so you can have a try if you are interested. In the 256-level grayscale test in the test software, you can see more small grays clearly when looking up, that is, the contrast ratio is better!

The brightness of the liquid crystal display module

A liquid crystal display is a substance between a solid and a liquid that does not emit light on its own, requiring the use of additional light sources.Therefore, the number of tubes related to the LCD brightness.The earliest liquid crystal display has only the upper and lower two lamp tubes, developed to the present, the lowest universal is also four lights, the high-end is six lights.4 lamp tube design is divided into 3 kinds of put a form: a kind is 4 sides have a lamp tube each, but the drawback is the meeting appears in the middle black shadow, the method that solves is the way that from top to bottom 4 lamp tubes arrange flat, the last kind is “U” put a form, it is two lamp tubes that two lamps produce in disguise actually.The six-tube design actually USES three tubes, which are bent into a “U” shape and placed in parallel to achieve the effect of six tubes.