Datasheet

SH1107
28
4. Set Contrast Control Register: (Double Bytes Command)
This command is to set contrast setting of the display. The chip has 256 contrast steps from 00 to FF. The segment output
current increases as the contrast step value increases.
Segment output current setting: ISEG = α/256 X IREF X scale factor
Where: α is contrast step; IREF is reference current equals 15.625μA; Scale factor = 32
n The Contrast Control Mode Set: (81H)
When this command is input, the contrast data register set command becomes enabled. Once the contrast control mode
has been set, no other command except for the contrast data register command can be used. Once the contrast data set
command has been used to set data into the register, then the contrast control mode is released.
A0
RD
(E)
WR
( WR/ )
D7 D6 D5 D4 D3 D2 D1 D0
0 1 0 1 0 0 0 0 0 0 1
n Contrast Data Register Set: (00H - FFH)
By using this command to set eight bits of data to the contrast data register; the OLED segment output assumes one of the
256 current levels.
When this command is input, the contrast control mode is released after the contrast data register has been set.
A0
E
(
RD
)
WR/
(
WR
)
D7 D6 D5 D4 D3 D2 D1 D0 ISEG
0 1 0 0 0 0 0 0 0 0 0 Small
0 1 0 0 0 0 0 0 0 0 1
0 1 0 0 0 0 0 0 0 1 0
0 1 0 : :
0 1 0 1 0 0 0 0 0 0 0 POR
0 1 0 : :
0 1 0 1 1 1 1 1 1 1 0
0 1 0 1 1 1 1 1 1 1 1 Large