Epson S1D13504 manual Look-Up Table Organization, Look-Up Table Configurations, Bank

Epson Research and Development	Page 17
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3.3.2Look-Up Table Organization

•The Look-Up Table (LUT) 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; a pixel value of 7 would point to the eighth LUT entry.

•The value inside each LUT entry represents the intensity of the given color or gray shade. This value ranges between 0 and 0Fh.

•The S1D13504 LUT is linear; increasing the LUT number results in a lighter color or gray shade. For example, a LUT entry of 0Fh into the red Look-Up entry will always result in a bright red output.

Table 3-7: Look-Up Table Configurations

Display Mode		4-Bit Wide Look-Up Table		Effective Grays/Colors on an
				Passive Panel
	RED	GREEN	BLUE
1 bpp gray		1 bank of 2		2 gray shades
2 bpp gray		4 banks of 4		4 gray shades
4 bpp gray		1 bank of 16		16 gray shades
8 bpp gray		2 banks of 8		8 gray shades
15 bpp gray				16 gray shades
16 bpp gray				16 gray shades
1 bpp color	1 bank of 2	1 bank of 2	1 bank of 2	2 colors
2 bpp color	4 banks of 4	4 banks of 4	4 banks of 4	4 colors
4 bpp color	1 bank of 16	1 bank of 16	1 bank of 16	16 colors
8 bpp color	2 banks of 8	2 banks of 8	4 banks of 4	256 colors
15 bpp color				4096 colors*
16 bpp color				4096 colors*

*On a TFT 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 (4096) through the frame rate modulator.

Indicates the look-up table is not used for that display mode

Programming Notes and Examples	S1D13504
Issue Date: 01/02/01	X19A-G-002-07