Epson S1D13505 Technical Manual page 180

Page 26
Gray Shade Modes
S1D13505
X23A-G-003-07
This discussion of gray shade/monochrome modes only applies to the panel interface.
Monochrome mode is selected when register [01] bit 2 = 0. In this mode the output value
to the panel is derived solely from the green component of the LUT. The CRT image will
continue to be formed from all three (RGB) Look-Up Table components.
Note
In order to match the colors on a CRT with the colors on a monochrome panel it is im-
portant to ensure that the red and blue components of the Look-Up Table be set to the
same intensity as the green component.
1 bpp gray shade
In 1 bpp gray shade mode only the first two entries of the green LUT are used. All other
LUT entries are unused.
Table 4-6: Recommended LUT Values for 1 Bpp Gray Shade
Address
00
01
02
...
FF
2 bpp gray shade
In 2 bpp gray shade mode the first four green elements are used to provide values to the
panel. The remaining indices are unused.
Table 4-7: Suggested Values for 2 Bpp Gray Shade
Index Red
0
1
2
3
4
...
FF
= Required to match CRT to panel
= Unused entries
Red Green
00 00
F0 F0
00 00
00 00
00 00
= Required to match CRT to panel
= Unused entries
Green
00 00
50 50
A0 A0
F0 F0
00 00
00 00
00 00
Epson Research and Development
Vancouver Design Center
Blue
00
F0
00
00
00
Blue
00
50
A0
F0
00
00
00
Programming Notes and Examples
Issue Date: 01/02/05