HD66781 Datasheet, PDF (158/196 Pages) Renesas Technology Corp – 720-channel Source Driver for a-Si TFT/Low Temperature Poly-Si TFT Panels with 262,144-color display RAM

HD66781
Preliminary
Grayscale Amplifier Configuration
The following figure illustrates the configuration of grayscale amplifier.
The eight-level grayscales (VIN0-7) are determined by the gradient adjustment and fine adjustment
registers. The 8 levels are then divided by the ladder resistors placed between each level into 64 levels
(V0-63).
VDH
Increment
adjustment
Fine adjustment(6 x 3 bits)
Amplitude
adjustment
PRP/N0,PRP/N1 PKP/N0
33
3
PKP/N1
3
PKP/N2
3
PKP/N3
3
PKP/N4
3
PKP/N5
3
VRP/N0 VRP/N1
45
VINP0
/VINN0
8 to 1
selector
VINP1
/VINN1
8 to 1
selector
8 to 1
selector
8 to 1
selector
8 to 1
selector
VINP2
/VINN2
VINP3
/VINN3
VINP4
/VINN4
VINP5
/VINN5
8 to 1
selector
VINP6
/VINN6
VINP7
/VINN7
VGS
Grayscale amplifier
V0
V1
V2
V3
V8
V9
V20
V21
V43
V44
V55
V56
V57
V62
V63
Rev.0.5, July.31.2003, page 158 of 196