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參數(shù)資料
| 型號： | HD66750TB0 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 122 x 32 pixel format, Compact LCD size |
| 中文描述： | 128 × 128點圖形LCD控制器/驅(qū)動器，四灰度函數(shù) |
| 文件頁數(shù)： | 59/96頁 |
| 文件大?。?/td> | 2068K |
| 代理商： | HD66750TB0 |
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HD66750/1
59
Contrast Adjuster
Software can adjust 64-step contrast for an LCD by varying the liquid-crystal drive voltage (potential
difference between V
LCD
and V1) through the CT bits of the contrast adjustment register (electron volume
function). The value of a variable resistor between V
LCD
and V1 (VR) can be precisely adjusted in a 0.05 x
R unit within a range from 0.05 x R through 3.20 x R, where R is a reference resistance obtained by dividing
the total resistance.
The HD66750/1 incorporates a voltage-follower operational amplifier for each of V1 to V5 to reduce
current flowing through the internal bleeder resistors, which generate different liquid-crystal drive voltages.
Thus, CT5-0 bits must be adjusted so that potential difference between V
LCD
and V1 is 0.1 V or higher and
that between V4 and GND is 1.4 V or higher when liquid-crystal drives, particularly when the VR is small.
VLCD
VR
R
R
R0
R
R
-+
-+
-+
-+
-+
GND
HD66750/1
CT
V1
V2
V3
V4
V5
GND
Figure 40 Contrast Adjuster
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 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 |
| HD66760 | 104 X 80-dot Graphics LCD Controller/Driver for 256 Colors |
| HD66766R | 132 x 176-dot Graphics LCD Controller/Driver for 65K Colors |
| HD667A66R | 132 x 176-dot Graphics LCD Controller/Driver for 65K Colors |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| HD66751S | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| HD66751TB0 | 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 |
| HD66753 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Datasheet|ADE-207-347|JAN.31.03|829K |
| HD66753TB0L | 制造商:Renesas Electronics Corporation 功能描述:IC PROC - Tape and Reel |
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