BU9799KV Datasheet, PDF (10/28 Pages) Rohm – Standard LCD Segment Driver

BU9799KV MAX 200 segments (SEG50×COM4)
Datasheet
○Display control (DISCTL)
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
C
0
1 P4 P3 P2 P1 P0
Set Power save mode FR
Power save mode FR
P4
P3 Reset initialize condition
Normal mode (80Hz)
0
0
○
Power save mode1 (71Hz)
0
1
Power save mode2 (64Hz)
1
0
Power save mode3 (50Hz)
1
1
* Power consumption is reduced in the follow order:
Normal mode > Power save mode1 > Power save mode2 > Power save mode3
Set LCD drive waveform
Setup
P2 Reset initialize condition
Line inversion
0
○
Frame inversion
1
* Power consumption is reduced in the follow order: Line inversion > Frame inversion
Refer to LCD drive waveform
Set Power save mode SR
Setup
P1
P0 Reset initialize condition
Power save mode1
0
0
Power save mode2
0
1
Normal mode
1
0
○
High power mode
1
1
* Power consumption is increased in the follow order:
Power save mode 1 < Power save mode 2 < Normal mode < High power mode
(Reference current consumption data)
Setup
Current consumption
Power save mode 1
×0.6
Power save mode 2
×0.8
Normal mode
×1.0
High power mode
×1.2
*Above data is reference. It depends on Panel load.
(Note) The setting of Power save mode FR, LCD waveform, Power save mode will influence the following display image qualities.
Please select most suitable value from current consumption and display image quality with LCD panel.
Mode
Power save mode FR
LCD waveform
Power save mode SR
Flicker
○
○
-
Image quality, contrast
-
○
○
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23.Jan.2015 Rev.003