參數(shù)資料
型號： HD66740TB0
廠商： Hitachi,Ltd.
英文描述： 50/MDR/RECP/VERT PRS FIT/M2.6/SCW/30MIN
中文描述： 112 × 80點(diǎn)圖形LCD控制器/驅(qū)動器
文件頁數(shù)： 44/95頁
文件大?。?/td> 856K
代理商： HD66740TB0
HD66740
44
n-raster-row Reversed AC Drive
The HD66740 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 five lines (1/40 duty), the n-raster-row reversed AC drive (C-pattern
waveform) can improve the quality. Determine the number of raster-rows n (NW bit set value + 1) 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
79 80 1 2 3 4 5 6 7 8 9 10 1112 13
79 80 1 2 3
B-pattern
waveform drive
1/80 duty
1 frame
1 frame
C-pattern
waveform drive
1/80 duty
11-raster-row
reversal
Without EORs
C-pattern
waveform drive
1/80 duty
11-raster-row
reversal
With EORs
Note: Specify the number of AC drive raster-rows and the necessity of EOR so that the DC bias is not generated for
the liquid crystal.
Figure 21 Example of an AC Signal under n-raster-row Reversed AC Drive
相關(guān)PDF資料
PDF描述
HD66740WTB0 112 x 80-dot Graphics LCD Controller/Driver
HD66751 128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions
HD66750TB0 122 x 32 pixel format, Compact LCD size
HD66750 128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions
HD66751TB0 128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD66740WTB0 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:112 x 80-dot Graphics LCD Controller/Driver
HD66741 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions
HD66750 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions
HD66750TB0 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions
HD66751 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions
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