Look-Up Table Organization - Epson S1D13706 Technical Manual

Epson Research and Development
Vancouver Design Center

4.2 Look-Up Table Organization

Color Depth
1 bpp gray
2 bpp gray
4 bpp gray
8 bpp gray
16 bpp gray
1 bpp color
2 bpp color
4 bpp color
8 bpp color
16 bpp color
Programming Notes and Examples
Issue Date: 01/02/23
• 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
Look-Up Table Indices Used
RED
2
4
16
256
= Indicates the Look-Up Table is not used for that display mode
GREEN BLUE
2
4
16
16
2 2
4 4
16 16
256 256
Page 19
Effective Gray
Shades/Colors
2 gray shades
4 gray shades
16 gray shades
64 gray shades
64 gray shades
2 colors
4 colors
16 colors
256 colors
65536 colors
S1D13706
X31B-G-003-03