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Page 18 Epson Research and Development
Vancouver Design Center
S1D13708 Programming Notes and Examples
X39A-G-003-01 Issue Date: 01/11/20
ADVANCE
D
IN
F
ORMATION
Subje
ct to C
ha
nge
5.2 Look-Up Table Organization
• The Look-Up Table treats the value of a pixel as an index into an array. For example, a
pixel value of zero would point to the first LUT entry, whereas a pixel value of seven
would point to the eighth LUT entry.
• The value contained in each LUT entry represents the intensity of the given color or
gray shade.
• The S1D13708 Look-Up Table is linear. This means increasing the LUT entry number
results in a brighter color or gray shade. For example, a LUT entry of FCh in the red
bank results in bright red output while a LUT entry of 1Ch results in dull red.
Table 5-1: Look-Up Table Configurations
Color Depth
Look-Up Table Indices Used
Effective Gray
Shades/Colors
RED GREEN BLUE
1 bpp gray
2 2 gray shades
2 bpp gray 4 4 gray shades
4 bpp gray 16 16 gray shades
8 bpp gray
256 64 gray shades
16 bpp gray 64 gray shades
1 bpp color 2 2 2 2 colors
2 bpp color 4 4 4 4 colors
4 bpp color 16 16 16 16 colors
8 bpp color 256 256 256 256 colors
16 bpp color
65536 colors
= Indicates the Look-Up Table is not used for that display mode