LH1684F View Datasheet(PDF) - Sharp Electronics
Part Name
Description
MFG CO.
'LH1684F' PDF : 34 Pages View PDF
LH1684F
11
6.3 Outline of operation timing
(1) Overall operation timing
Video signals
Horizontal
blanking
period
<
Effective
display
period
>
One horizontal
scanning period
4
0‘)
.1
One horizontal
scanning period
ti+l)
>
DIS
(Internal discharge signal)
Sl
s240
(Internal sampling srgnals)
OS1 to OS240
(LCD drive outputs)
Output diszge
Sampling data
(j-l) output
period Output diszge
Sampling data
0’) output
Sampling data
(j+l) output
period Output diszrge period
Video signalsof one horizontal scanning period are sampied into the sampleand hold circuits
at the timing of the internal sampling pulses of each output circuits, outputs are discharged
once on the GND level by the internal discharge signal, and data corresponding to the
sampled data are output.
This discharge operation is performed simultaneously for alloutput pins.
(2) Timing of output discharge and video signal sampling
The output discharge period (period “H” of the internal discharge signalDIS) is after3 cycles
of clock CK from the “H” period of start pulse SPD. Therefore, the output discharge period is
almostthe sameperiod asthe “H” period of start pulse SPD.
lfthe normalsamplingoperation and cascade sequence is lst, the video signalsampling
(internal samplingsignalSn) is started after 15 cycles of clock CK following the fall of start
pulse SPD.
CK
SP [
DIS
c---
Output discharge- period -
Sl (Normal sampling operation, cascade sequence 1st)
Video signal sampling start
Share Link: 
