Epson S1D13706 - Look-Up Table Organization

Epson Research and Development
Page 19
Vancouver Design Center
Programming Notes and Examples S1D13706
Issue Date: 01/02/23 X31B-G-003-03
4.2 Look-Up Table Organization
• The Look-Up Table treats the value of a pixel as an index into an array of colors or gray
shades. 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. This intensity can range in value between 0 and 0Fh.
• The S1D13706 Look-Up Table is linear. This means increasing the LUT entry number
results in a lighter color or gray shade. For example, a LUT entry of 0Fh in the red bank
results in bright red output while a LUT entry of 05h results in dull red.
Table 4-1: 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
16 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