參數(shù)資料
型號： HD66787
廠商： Renesas Technology Corp.
英文描述： 528-channel, One-chip Driver with 262,144-color Display RAM and Power Supply Circuit for Low-temperature Poli-Si TFT (LTPS-TFT) Panels with Incorporat
中文描述： 528與262,144色顯示RAM和低電源電路通道，單芯片驅(qū)動(dòng)器的溫度和旋鈴聲非晶硅TFT（薄膜晶體管）與Incorporat小組
文件頁數(shù)： 119/159頁
文件大?。?/td> 1607K
代理商： HD66787
HD66787
Preliminary
Rev.0.22, May.23.2003, page 119 of 159
γ
-Correction Register
The
γ
-adjustment register is a group of registers to set an appropriate grayscale voltage for the
γ
-
characteristics of a liquid crystal panel. The register group is categorized into the ones adjusting gradient,
amplitude, and fine-tuning in relation to grayscale number and grayscale voltage characteristics. Each
register can make an independent setting for the positive/negative polarity. The reference value and RGB
are common to both polarities.
G
Grayscale number
Gradient adjustment
G
G
Grayscale number
Amplitude adjustment
Grayscale number
Fine adjustment
Gradient, Amplitude, Fine Adjustments
1. Gradient adjustment registers
The gradient adjustment registers are used to adjust the gradient around the middle of the grayscale number
and voltage characteristics without changing a dynamic range. To adjust a gradient, the values of the
variable resistors (VRHP (N)/VRLP (N)) in the ladder resistor block for grayscale voltage generation are
controlled. The registers incorporate separate registers for positive and negative polarities to be compatible
with asymmetric drive.
2. Amplitude adjustment registers
The amplitude adjustment registers are used to adjust the amplitude of the grayscale voltage. To adjust the
amplitude, the values of the variable resistors (VRP(N)1/0) in the bottom of the ladder resistor block for
grayscale voltage generation are adjusted. Same with the gradient registers, the amplitude adjustment
registers also incorporate separate registers for positive and negative polarities.
3. Fine adjustment registers
The fine adjustment register is to fine-adjust the grayscale voltage level. To fine-adjust the grayscale
voltage level, each level of 8-level reference voltages generated from the ladder registers is controlled by 8-
to-1 selector. Same with the other registers, the fine adjustment registers also incorporate separate registers
for positive and negative polarities.
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PDF描述
HD66840 Peripheral IC
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD66789 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:528-channel, One-chip Driver for Amorphous TFT Panels with 262,144-color display RAM, Power Supply Circuit, and Gate Circuit
HD667A66R 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:132 x 176-dot Graphics LCD Controller/Driver for 65K Colors
HD667B66R 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:132 x 176-dot Graphics LCD Controller/Driver for 65K Colors
HD66840 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral IC
HD66840F25 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Controller
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