Data Sheet

a-Si TFT LCD Single Chip Driver
240RGBx320 Resolution and 262K color
ILI9341
The information contained herein is the exclusive property of ILI Technology Corp. and shall not be distributed,
reproduced, or disclosed in whole or in part without prior written permission of ILI Technology Corp.
Page 169 of 233
8.3.9. Backlight Control 1 (B8h)
B8h Backlight Control 1
D/CX RDX WRX D17-8 D7 D6 D5 D4 D3 D2 D1 D0 HEX
Command 0 1 ↑ XX 1 0 1 1 1 0 0 0 B8h
Parameter 1 ↑ XX 0 0 0 0 TH_UI [3] TH_UI [2] TH_UI [1] TH_UI [0] 0C
Description
TH_UI [3:0] : These bits are used to set the percentage of grayscale data accumulate histogram value in the user interface
(UI) mode. This ratio of maximum number of pixels that makes display image white (=data “255”) to the total of
pixels by image processing.
TH_UI [3:0] Description TH_UI [3:0] Description
4’0h 99% 4’8h 84%
4’1h 98% 4’9h 82%
4’2h 96% 4’Ah 80%
4’3h 94% 4’Bh 78%
4’4h 92% 4’Ch 76%
4’5h 90% 4’Dh 74%
4’6h 88% 4’Eh 72%
4’7h 86% 4’Fh 70%
Register
Availability
Status Availability
Normal Mode On, Idle Mode Off, Sleep Out Yes
Normal Mode On, Idle Mode On, Sleep Out Yes
Partial Mode On, Idle Mode Off, Sleep Out Yes
Partial Mode On, Idle Mode On, Sleep Out Yes
Sleep In Yes
Default
Default Value
Status
TH_UI [3:0]
Power On Sequence 4’b0110
SW Reset No change
HW Reset 4’b0110