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參數(shù)資料
| 型號： | GM2121 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | SXGA LCD Monitor Controller with Integrated Analog Interface and Dual LVDS Transmitter |
| 中文描述： | SXGA液晶顯示器控制器集成模擬接口和雙路LVDS發(fā)送器 |
| 文件頁數(shù)： | 33/51頁 |
| 文件大小： | 489K |
| 代理商： | GM2121 |
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gm2121 Preliminary Data Sheet
C2121-DAT-01F
33
December 2002
http://www.genesis-microchip.com
DCLK (Output)
DEN (Output)
OR/OG/OB
(Output)
rgb0
rgb8
rgb6
rgb4
rgb2
ER/EG/EB
(Output)
XXX
rgb1
rgb9
rgb7
rgb5
rgb3
XXX
Figure 22.
Double Pixel Wide Display Data
4.10.3 Panel Power Sequencing (PPWR, PBIAS)
gm2121 has two dedicated outputs PPWR and PBIAS to control LCD power sequencing once data and
control signals are stable. The timing of these signals is fully programmable.
PPWR Output
Panel Data and Control Signals
PBIAS Output
<State0>
<State1>
<State2>
<State3>
<State2>
<State1>
<State0>
TMG1
TMG2
TMG2
TMG1
POWER_SEQ_EN = 1
POWER_SEQ_EN = 0
Figure 23.
Panel Power Sequencing
4.10.4 Output Dithering
The Gamma LUT outputs a 10-bit value for each color channel. This value is dithered down to either 8-
bits for 24-bit per pixel panels, or 6-bits for 18-bit per pixel panels.
The benefit of dithering is that the eye tends to average neighboring pixels and a smooth image free of
contours is perceived. Dithering works by spreading the quantization error over neighboring pixels both
spatially and temporally. Two dithering algorithms are available: random or ordered dithering. Ordered
dithering is recommended when driving a 6-bit panel.
All gray scales are available on the panel output whether using 8-bit panel (dithering from 10 to 8 bits per
pixel) or using 6-bit panel (dithering from 10 down to 6 bits per pixel).
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