sed1355 ETC-unknow, sed1355 Datasheet - Page 172

• Manufacturer Part Number: sed1355
• Description: Sed1355 Embedded Ramdac Lcd/crt Controller
• Manufacturer: ETC-unknow

Page 16
4.2 Look-Up Table Organization
SED1355
X23A-G-003-05
* On an active matrix panel the effective colors are determined by the interface width. (i.e. 9-bit=512, 12-bit=4096, 18-
bit=64K colors) Passive panels are limited to 12-bits through the Frame Rate Modulator.
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 shades.
• The value inside each LUT entry represents the intensity of the given color or gray shade. This
• The SED1355 Look-Up Table is linear; increasing the LUT entry number results in a lighter
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.
intensity can range in value between 0 and 0Fh.
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
RED
256
Table 4-1: Look-Up Table Configurations
16
2
4
4-Bit Wide Look-Up Table
GREEN
256
16
16
16
2
4
2
4
BLUE
256
16
2
4
Epson Research and Development
Programming Notes and Examples
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
Vancouver Design Center
4096 colors*
4096 colors*
256 colors
16 colors
2 colors
4 colors
Issue Date: 99/04/27