參數(shù)資料
型號: HD66732
廠商: Hitachi,Ltd.
英文描述: Graphics Liquid Crystal Display Controller/Driver Supporting JIS Level-1 and Level-2 Kanji ROM(圖形LCD控制器/驅(qū)動器)
中文描述: 圖形液晶顯示控制器/驅(qū)動器支持日標(biāo)級- 1和第2級漢字光盤(圖形液晶顯示控制器/驅(qū)動器)
文件頁數(shù): 75/133頁
文件大?。?/td> 2608K
代理商: HD66732
HD66732
75
n-raster-row Reversed AC Drive
The HD66732 supports not only the LCD reversed AC drive in a one-frame unit (B-pattern waveform) but
also the n-raster-row reversed AC drive which alternates in an n-raster-row unit from one to 32 raster-rows
(C-pattern waveform). When a problem affecting display quality occurs, such as crosstalk at high-duty
driving of more than three lines (1/42 duty), the n-raster-row reversed AC drive (C-pattern waveform) can
improve the quality. Determine the number of raster-rows n for alternating after confirmation of the
display quality with the actual LCD panel. However, if the number of AC raster-rows is reduced, the LCD
alternating frequency becomes high. Because of this, the charge or discharge current is increased in the
LCD cells.
1 2 3 4 5 6 7 8 9 10 1112 13
53 54 1 2 3 4 5 6 7 8 9 10 1112 13
53 54 1 2 3
B-pattern
waveform drive
1/54 duty
1 frame
1 frame
C-pattern
waveform drive
1/54 duty
10-raster-row
reversal
Without EORs
C-pattern
waveform drive
1/54 duty
9-raster-row
reversal
With EORs
Figure 35 Example of an AC Signal under n-raster-row Reversed AC Drive
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