VII LCD CONTROLLER BLOCK: LCD CONTROLLER

A-1

Look-up Tables

The LCD controller contains a look-up table consisting of 16 4-bit entries, one for each of the RGB color elements (red, green, and blue).

Red look-up table

0 4-bit luminance data

1

2

Pixel data 3

4-bit display data (R)

The pixel data

:

:

selects an LUT entry.

14

15

Green look-up table

0 4-bit luminance data

1

2

Pixel data 3

:

:

14

15

4-bit display data (G or Gray)

Blue look-up table

04-bit luminance data

3

Pixel data4-bit display data (B)

:

:

14

15

Figure 2.8 Configuration of the Look-up Tables

The pixel data in the display memory is used as an index to the look-up tables, so that luminance data is generated based on the values in the entries indicated by the pixel data, before being output to the LCD panel.

The LCD controller can control reversal of the display. This control is exercised on the output of the look-up tables.

B-VII

LCDC

S1C33L03 FUNCTION PART

EPSON

B-VII-2-11