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Epson Research and Development Page 19
Vancouver Design Center
Programming Notes and Examples S1D13708
Issue Date: 01/11/20 X39A-G-003-01
ADVANCE
D
IN
F
ORMATION
Subje
ct to C
ha
nge
5.2.1 Gray Shade Modes
Gray shade (monochrome) modes are defined by the Color/Mono Panel Select bit
(REG[10h] bit 6). When this bit is set to 0, the value output to the panel is derived solely
from the green component of the pixel.
For each bits-per-pixel mode (excluding 16 bpp) a table of sample LUT values is provided.
These LUT values are a standardized set of intensities used by the Epson S1D13708 utility
programs.
Note
These LUT values carry eight bits of significance. The S1D13708 LUT uses only the six
most-significant bits. The 2 least-significant bits are ignored.
1 bpp gray shade
The 1 bpp gray shade mode uses the green component of the first 2 LUT entries. The
remaining indices of the LUT are unused.
2 bpp gray shade
The 2 bpp gray shade mode uses the green component of the first 4 LUT entries. The
remaining indices of the LUT are unused.
Table 5-2: Suggested LUT Values for 1 Bpp Gray Shade
Index Red Green Blue
00
00 00 00
01 00 FF 00
02
00 00 00
... 00 00 00
FF 00 00 00
Unused entries
Table 5-3: Suggested LUT Values for 4 Bpp Gray Shade
Index Red Green Blue
00 00 00 00
01 00 55 00
02 00 AA 00
03
00 FF 00
04 00 00 00
... 00 00 00
FF
00 00 00
Unused entries