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參數(shù)資料
| 型號： | HD66781 |
| 廠商： | Renesas Technology Corp. |
| 英文描述： | 720-channel Source Driver for a-Si TFT/Low Temperature Poly-Si TFT Panels with 262,144-color display RAM |
| 中文描述： | 720通道源驅(qū)動的非晶硅薄膜晶體管/低溫多晶硅TFT面板與262,144色顯示RAM |
| 文件頁數(shù)： | 73/196頁 |
| 文件大?。?/td> | 2416K |
| 代理商： | HD66781 |
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HD66781
Preliminary
Rev.0.5, July.31.2003, page 73 of 196
Common registers for HD66783 and HD667P21
BT[2:0]:
Change the output scale of step-up circuits. Adjust the step-up scale according to the voltage in
use. To set power consumption lower, it is necessary to set the step-up scale smaller. For details, see the
datasheets of HD66783 and HD667P21.
VCOMG:
Make settings for the output level of VcomL.
VCOMG = 0
The low-side output of Vcom is fixed to GND and the instruction (VDV) setting
becomes invalid. Outputs from VcomL and VCL are halted.
For this reason, the VCOMG setting is related to the power-supply startup
sequence. Make a VCOMG setting by following the power-supply setting
sequence.
The low-side output of Vcom becomes VcomL. The output voltage of VcomL is
set by instruction (VDV) setting. VCOMG = 1 is valid when PON = 1.
VCOMG = 1
VC[2:0]:
Adjust the reference voltages of VREG1OUT, VREG2OUT, and Vci1 voltages according to Vci
as the reference voltage. For details, see the datasheets of HD66783 and HD667P21.
VRH[3:0]:
Set the amplifying scale of VREG1OUT with the values set in VC bits (REGP) as an input.
For details, see the datasheets of HD66783 and HD667P21.
VCM[4:0]:
Make a setting for VcomH (the “High” of Vcom). VcomH can be amplified to VREG1OUT x
0.41 ~ 1.00. When VCM = 5’h01, VcomH is not adjusted by the internal volume adjustment but by an
external resistor from VcomR. For details on whether to generate the VcomH level with internal electronic
volume or an external resistor, see the datasheets of HD66783 and HD667P21.
VDV[4:0]:
Set the Vcom alternating amplitude. The setting is invalid without Vcom alternating drive. For
details, see the datasheets of HD66783 and HD667P21.
Registers of HD66783
AP[2:0]:
Adjust the amount of constant current in the operational amplifier in the liquid crystal drive
power supply. When the amount of constant current is set large, the liquid crystal drive capacity is
enhanced and the display quality will improve, while the current consumption will increase. Select an
optimum amount of current taking both the display quality and the current consumption into account.
When no display operation is required, set AP[2:0] = “3’h0” to halt the operation of operational amplifiers
and step-up circuits to reduce the current consumption. To set AP[2:0] otherwise, it starts step-up circuits
to output VGH. For details, see the datasheets of HD66783.
DC0[2:0]:
Select the operation frequency of step-up circuit 1. If the step-up operation frequency is set high,
display quality will be enhanced due to increased drive capacity of step-up circuit, while power
consumption will be increased. Make an adjustment taking both display quality and power consumption
into consideration. For details, see the datasheets of HD66783.
GON:
When GON=0, the output level of G1~G320 pins of HD66783 becomes VGH and the Vcom level
becomes GND.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| HD66787 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述: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 |
| 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 |
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