Epson S1D13706 - Page 181

Epson Research and Development
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Vancouver Design Center
Programming Notes and Examples S1D13706
Issue Date: 01/02/23 X31B-G-003-03
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.
8 bpp gray shade
When configured for 8 bpp gray shade mode, the green component of all 256 LUT entries
may be used. However, the green component alone only provides 64 intensities (6 bits).
16 bpp gray shade
The Look-Up Table is bypassed at this color depth, therefore programming the LUT is not
required.
As with 8 bpp there are limitations to the colors which can be displayed. In this mode the
six bits of green are used to set the absolute intensity of the image. This results in 64 gray
shades.
Table 4-4: Suggested LUT Values for 4 Bpp Gray Shade
Index Red Green Blue
00
00 00 00
01 00 10 00
02
00 20 00
03 00 30 00
04 00 44 00
05
00 54 00
06 00 64 00
07
00 74 00
08
00 88 00
09 00 98 00
0A 00 A8 00
0B
00 B8 00
0C 00 CC 00
0D 00 DC 00
0E
00 EC 00
0F 00 FC 00
10 00 00 00
...
00 00 00
FF 00 00 00
Unused entries