Gray Shade Modes - Epson S1D13506 Technical Manual

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4.2.2 Gray Shade Modes

S1D13506
X25B-G-003-04
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
...
FF
Red Green Blue
00 00
10 10
20 20
30 30
40 40
50 50
60 60
70 70
80 80
90 90
A0 A0 A0
B0 B0 B0
C0 C0 C0
D0 D0 D0
E0 E0
F0 F0 F0
00 00
00 00
00 00
Required to match CRT to panel
Unused entries
Epson Research and Development
Vancouver Design Center
00
10
20
30
40
50
60
70
80
90
E
00
00
00
Programming Notes and Examples
Issue Date: 02/03/21