UPD16633B Datasheet, PDF (11/20 Pages) NEC – 312 OUTPUT TFT-LCD SORCE DRIVER COMPATIBLE WITH 64 GRAY SCALES

µPD16633B
8. CAUTIONS ABOUT FRAME INVERSION
In the case of dot inversion, n frame last line and (n+1) frame first line is the same polarity.
When write the same polarity twice, there are two cases as follows.
(1) last line output in n frame > first line output in (n+1) frame → Possible to write
(2) last line output in n frame < first line output in (n+1) frame → Not possible to write
µPD16633B has charge buffer and discharge buffer, so need to inversion polarity and write in the case of both
ways.
Vertical intervals
STB
n frame last line
(n+1) frame
first line
(n+1) frame
second line
POL
Discharge buffer
Charge buffer
S2N
VCOM
Hi-z
Hi-z
Hi-z
STB
POL
S2N
n frame last line
Vertical intervals
(n+1) frame
first line
(n+1) frame
second line
VCOM
Hi-z
Hi-z
Hi-z
Hi-z
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