upd161608 Renesas Electronics Corporation., upd161608 Datasheet - Page 63

• Manufacturer Part Number: upd161608
• Description: 176-rgb X 220-dot 1-chip Driver Ic For 262,144-color Tft-lcd Display
• Manufacturer: Renesas Electronics Corporation.

20. n-RASTER-ROW REVERSED AC DRIVER
drive which alternates in an n-raster-row unit from one to 128 raster-rows. When a problem affecting display quality
occurs, the n-raster-row reversed AC drive can improve the quality.
with the actual LCD panel. However, if the number of AC raster-row is reduced, the LCD alternating frequency becomes
high. Because of this, the charge or discharge current is increased in the LCD cells.
The
Determine the number of the raster-rows n (NW bit set value + 1) for alternating after confirmation of the display quality
μ
PD161608 supports not only the LCD reversed AC drive in a one-frame unit but also the n-raster-row reversed AC
1-line inversion (B/C = 1, EOR = 1, NW6 to NW0 = 0, 220 gate line display)
1
2
3
Figure 20−1. Example of an AC Signal under n-raster-row Reversed AC Drive
4
1 frame period
219
220
Vertical blank
period
Data Sheet S17594EJ2V0DS
224
1
2
3
4
5
1 frame period
219
220
Vertical blank
period
μ
PD161608
224
1
2
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