LED display common concepts
LED display common concepts
Mar 30LED display common concepts
Led display common cocepts ：
1.Pixel :it is the smallest unit that can be controled .the full name of the pixel is “picture element”.In a 3 color led display ,the pixels is made by 3 different colors red,green ,blue .Each parts is made buy one led or some leds , in theory that the different 3 colors can display every color by adjust the led light’s brightness .
2.Pitch :Distance between the centers of adjacent pixels. The smaller of the spacing, the distance visual should be shorter .
3.Resolution :Normally use a in a digiital display equipment ,it means the total pixels and it is usually wrote to a wideth*height ,something like 800*600.
4.Viewing Angle :The maximum brightness of the led when the observer face to the led .
5.Brightness:Brightness in any display device is the most important parameters.
Brightness of the main unit is called candle (candela), with a CD that a single LED brightness usually use “millicandelas”,( MCD), it is 0.1% CD.
6.Viewing Distance :For many of display devices, the best viewing distance should be the minimum distance which human eye can not distinguish .This distance is about 3400 times the distance between points. TV and computers are usually smaller than the this distance . But acceptable distance not less than 1,700 times the distance between points.
7.Color Temperature:The brightness of the red ,green ,blue must be restored balance to the true and accurate color.In other words ,the white must be white ,not pink ,if these 3 colors are in the higgest brightness ,the mixed color usually is not white ,in order to get the white (normally it’s 6500K) these 3 different colors must be get 1 or 2 color make the brightness lower ,in order to get the corecct white color ,must be repeated measurement .This procedure is called “Blance white .