HD66781 Datasheet, PDF (48/196 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
PTS [2:0]: Determine the kind of source outputs in the no-display area, which is applied to the front/back
porch periods and non-display area of partial display. When PTS [2] =1, the grayscale voltage generating
amplifiers are halted except those for the V0 and V63 levels during no-display area drive period to reduce
power consumption.
Table 24
PTS[2:0]
Non-display source output
Positive polarity Negative polarity
Non-display area
Operation of grayscale
amplifier
Non-display area
Step up clock
frequency
3’h0
V63
V0
V0 to V63
DC0, DC1 setting
3’h1
Setting disabled Setting disabled
-
DC0, DC1 setting
3’h2
GND
GND
V0 to V63
DC0, DC1 setting
3’h3
Hi-Z
Hi-Z
V0 to V63
DC0, DC1 setting
3’h4
V63
V0
V0, V63
DC0, DC1 setting x 1/2
3’h5
Setting disabled Setting disabled
-
-
3’h6
GND
GND
V0, V63
DC0, DC1 setting x 1/2
3’h7
Hi-z
Hi-z
V0, V63
DC0, DC1 setting x 1/2
Note 1) Gate outputs in non-display area are controlled by the off-scan mode (PTG).
Note 2) Grayscale amplifier operation halt and slowdown of step-up clocks are applied to the non-display
area.
Note 3) When DC[4:3]=2’h3, the frequency of step-up clocks in the non-display area are not slowed down
half even if PTS[2:0] is set to 4, 6 or 7.
Rev.0.5, July.31.2003, page 48 of 196