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Epson Research and Development
Vancouver Design Center
4.2.2 Gray Shade Modes
This discussion of gray shade (monochrome) modes only applies to the panel interface.
Monochrome mode is selected when REG[030h] bit 2 returns a 0. In this mode the value
output to the panel is derived solely from the green component of the LUT. The CRT/TV
image is formed from all three LUT components (RGB).
Note
In order to match the colors on a CRT/TV with the colors on a monochrome panel when
displaying identical images on the panel and CRT/TV, the red and blue components of
the LUT must be set to the same intensity as the green component.
4 bpp gray shade
The 4 bpp gray shade mode uses the green component of the first 16 LUT entries. The
remaining indices of the LUT are unused.
Table 4-4: Suggested LUT Values for 4 Bpp Gray Shade
Index
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
10
...
Red
00
10
20
30
40
50
60
70
80
90
A0
B0
C0
D0
E0
F0
00
00
00
Green
00
Blue
00
10
20
30
40
50
60
70
80
90
A0
B0
C0
D0
E
10
20
30
40
50
60
70
80
90
A0
B0
C0
D0
E0
F0
00
F0
00
00
00
00
FF
00
Required to match CRT to panel
Unused entries
S1D13506
X25B-G-003-03
Programming Notes and Examples
Issue Date: 01/02/06
EPSON [ EPSON COMPANY ]
