93
Sirius-PJ1Training
Slide 93
Panel Drive Processing
IC7001
CXD3548GB
Digital Signal Driver/
Timing Generator
IC7201
CXA7009R
LCD Driver
IC7301
CXA7009R
LCD Driver
IC7401
CXA7009R
LCD Driver
From SyncDet
From Combine2
LCD
LCD
LCD
3-Wire 2
CLK,H,V
Timing
VCOM
VCOM
VCOM
POPB
POPG
POPR
12bit
12 layer
VSIG [1-12]
12 layer
VSIG [1-12]
12 layer
VSIG [1-12]
12bit
12bit
I2C
RGB 10bit x3
The video signal and sync signal output in 10-bit 3ch from Combine2 (IC6005) is
input to the digital signal driver/timing generator IC (IC7001) for the liquid crystal
panel. Then it is output to the liquid crystal panel driver IC (IC7201, 7301, 7401)
passing through each correction circuit, including V-T correction, color shading
correction.
In the V-T correction part, the input signal is converted to the data subject to
characteristics of the liquid crystal panel according to the lookup table. In the
color shading correction part, arithmetic processing is performed on the video
signals, so that correction data provided at each point in the window which is
divided into 29 (horizontally) times 17 (vertically) in case of XGA, and 30
(horizontally) times 17 (vertically) in case of WXGA, is equalized.
The digital signal driver/timing generator IC for the liquid crystal panel is
controlled by the 3-wire serial interface from SyncDet (IC2801).
The 12-bit 3ch 2-phase video signals output from the digital signal driver/timing
generator IC for the liquid crystal panel are converted to 12-phase analog
signals, in packs of RGB colors after D/A, and level conversion by the liquid
crystal panel driver IC, and supplied to the liquid crystal panel.
The timing signal driving for the liquid crystal panel is configured by the digital
signal driver/timing generator IC for the liquid crystal panel, and the output timing
signal will be supplied to the liquid crystal panel. The common voltage (VCOM)
for the liquid crystal panel is supplied to each panel using a dedicated terminal
for the liquid crystal panel driver IC. Each common voltage is set by I2C control
from the digital signal driver/timing generator IC for the liquid crystal panel.
