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參數(shù)資料
| 型號(hào)： | HD66136T |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 400-Channel Segment Driver for a Dot-Matrix STN Liquid Crystal Display with Low-Voltage Drive(點(diǎn)陣STN LCD低壓段碼驅(qū)動(dòng)器) |
| 中文描述： | 400通道段為驅(qū)動(dòng)點(diǎn)矩陣STN液晶顯示器用低電壓驅(qū)動(dòng)器（點(diǎn)陣STN液晶顯示器低壓段碼驅(qū)動(dòng)器） |
| 文件頁數(shù)： | 13/34頁 |
| 文件大?。?/td> | 133K |
| 代理商： | HD66136T |
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HD66136T
13
Correction Circuit
The HD66136T includes shadowing correction circuits. There are two types of shadowing: one caused by
crosstalk, and the other by waveform distortion. In both types, image quality can be improved by
correction circuits CC1, CC2, CC3, and CC4.
(1) CC1 and CC2 (shadowing caused by crosstalk)
(a)
(b)
White
White Black
Black
Black Black
White
White
White
White
SEG
COM
SEG
COM
M
Waveform at (a)
Waveform at (b)
Shadowing section
(Normally black panel)
Corresponding
sections
Figure 9 CC1 and CC2
When a ruled line is displayed, noise occurs in the common VM level in the LCD panel due to the segment
change of solid background in M reverse. This because many segments display the solid background and
are simultaneously changed, affecting the common VM level (creating crosstalk). The effective voltage for
section (a) in the solid background becomes low. On the other hand, the effective voltage for section (b)
becomes high. Shadowing occurs in the corresponding sections due to the different voltages.
The HD66136T compares the crosstalk correction signal CC1 and CC2 and the present output, and
determines whether the effective value is increased by the crosstalk. If increased, the output level is set to
V0S or V1S, which corrects the effective voltages in (a) and (b) and suppresses the shadowing.
After the M reverse, output is corrected while CC1 and CC2 are high. Figure 10 shows an example of the
crosstalk-correction-signal external circuit. The reference potentials of a comparator (VM +
V and VM –
é￠V') must be corrected to generate clocks used to correct noise. Then the clocks must be amplified to
generate CC1 and CC2 according to the shadowing level. Only CC1 and CC2 after the M reverse can be
correction signals. The CC1 corrects falling crosstalk, and the CC2 corrects rising crosstalk.
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PDF描述 |
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| HD66137T | High-Voltage Durable 240-Channel Common Driver for Dot-Matrix STN LCD(點(diǎn)陣STN LCD的高電壓耐用240通道驅(qū)動(dòng)器) |
| HD66137 | High-Voltage Durable 240-Channel Common Driver for Dot-Matrix STN LCD |
| HD66204 | DOT MATRIX LIQUID CRYSTAL GRAPHIC DISPLAY COLUMN DRIVER WITH 80-CHANNEL OUPUTS |
| HD66204F | DOT MATRIX LIQUID CRYSTAL GRAPHIC DISPLAY COLUMN DRIVER WITH 80-CHANNEL OUPUTS |
| HD66204FL | DOT MATRIX LIQUID CRYSTAL GRAPHIC DISPLAY COLUMN DRIVER WITH 80-CHANNEL OUPUTS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD66137 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:High-Voltage Durable 240-Channel Common Driver for Dot-Matrix STN LCD |
| HD66137T | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:High-Voltage Durable 240-Channel Common Driver for Dot-Matrix STN LCD |
| HD66204 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:DOT MATRIX LIQUID CRYSTAL GRAPHIC DISPLAY COLUMN DRIVER WITH 80-CHANNEL OUPUTS |
| HD66204F | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:DOT MATRIX LIQUID CRYSTAL GRAPHIC DISPLAY COLUMN DRIVER WITH 80-CHANNEL OUPUTS |
| HD66204FL | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:DOT MATRIX LIQUID CRYSTAL GRAPHIC DISPLAY COLUMN DRIVER WITH 80-CHANNEL OUPUTS |
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