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Epson Research and Development
Vancouver Design Center
S1D13505 Programming Notes and Examples
X23A-G-003-07 Issue Date: 01/02/05
Gray Shade Modes
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.
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 4-6: Recommended LUT Values for 1 Bpp Gray Shade
Address Red Green Blue
00
00 00 00
01 F0 F0 F0
02
00 00 00
... 00 00 00
FF 00 00 00
= Required to match CRT to panel
= Unused entries
Table 4-7: Suggested Values for 2 Bpp Gray Shade
Index Red Green Blue
0
00 00 00
1
50 50 50
2 A0 A0 A0
3 F0 F0 F0
4
00 00 00
... 00 00 00
FF 00 00 00
= Required to match CRT to panel
= Unused entries