參數(shù)資料
型號: TP6508
英文描述: Pushbutton Switch; Actuator Diameter:0.078"; Circuitry:6PDT; Switch Operation:6 Changeover Push-Push; Contact Current Max:100mA; Leaded Process Compatible:Yes; Mounting Type:PCB; Switch Function:6PDT
中文描述: 顯卡
文件頁數(shù): 38/134頁
文件大小: 600K
代理商: TP6508
P.35
* Gray Scaling
Gray scaling is the continuous frame ON/OFF ratio according to the corresponding gray level.
We can do 2/4 gray level for pixels as follow:
But notice how the dark pixels line up in diagonal columns. These rows of diagonal columns
create regular striations marching across the gray region cycle by cycle.
Alternating the pixels other ways doesn't solve the problem but only creates vertical or other
diagonal columns. If not designed correctly, a controller will exhibit diagonal columns jitter or scrambled
movement across gray regions, greatly degrading display quality.
How to eliminate the stripping wave become the key point of the panel VGA design. Basically,
manufactures obey the following rules:
(1) Pixels On/Off ratio are proportional to gray level.
(2) The modulation sequence of neighboring pixels are uncorrelative to reduce stippling wave.
FRAME 0
FRAME 1
FRAME 2
FRAME 3
S
0
3/ 8
S
1
3/ 8
S
2
3/ 8
S
3
3/ 8
Frame
Seq.
0
1
2
3
4
5
6
7
1
1
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
1
1
S
0
3/ 8
S
1
3/ 8
S
2
3/ 8
S
3
3/ 8
NOTE : 1 = ON , 0 = OFF
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