S1D13505 Epson Electronics America, Inc., S1D13505 Datasheet - Page 175

• Manufacturer Part Number: S1D13505
• Description: LCD Controller
• Manufacturer: Epson Electronics America, Inc.

Epson Research and Development
Vancouver Design Center
4.2 Look-Up Table Organization
Programming Notes and Examples
Issue Date: 01/02/05
*
bit=64K colors) Passive panels are limited to 12-bits through the Frame Rate Modulator.
On an active matrix panel the effective colors are determined by the interface width. (i.e. 9-bit=512, 12-bit=4096, 18-
Display Mode
15 bpp color
16 bpp color
15 bpp gray
16 bpp gray
1 bpp color
2 bpp color
4 bpp color
8 bpp color
1 bpp gray
2 bpp gray
4 bpp gray
8 bpp gray
• The Look-Up Table treats the value of a pixel as an index into an array of colors or gray
• The value inside each LUT entry represents the intensity of the given color or gray
• The S1D13505 Look-Up Table is linear; increasing the LUT entry number results in a
shades. For example, a pixel value of zero would point to the first LUT entry; a pixel
value of 7 would point to the eighth LUT entry.
shade. This intensity can range in value between 0 and 0Fh.
lighter color or gray shade. For example, a LUT entry of 0Fh into the red LUT entry will
result in a bright red output while a LUT entry of 5 would result in a dull red.
= Indicates the Look-Up Table is not used for that display mode
Table 4-1: Look-Up Table Configurations
RED
256
16
2
4
4-Bit Wide Look-Up Table
GREEN
256
16
16
16
2
4
2
4
BLUE
256
16
2
4
Effective Gray Shade/Colors
on an Passive Panel
16 gray shades
16 gray shades
16 gray shades
16 gray shades
2 gray shades
4 gray shades
4096 colors*
4096 colors*
256 colors
16 colors
2 colors
4 colors
X23A-G-003-07
S1D13505
Page 21