UPD161622 NEC, UPD161622 Datasheet - Page 40

• Manufacturer Part Number: UPD161622
• Description: 396 OUTPUT TFT-LCD SOURCE DRIVER
• Manufacturer: NEC

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10 and 5 11by using the contrast value registers (R36 to R39)
Caution The usable range in which each output level of VPH, VNH, VPL, and VNL can be set depends on the
40
The value of each amplifier output can be expressed as follows and the value of
VNL, BVPL, VNH, VPH = (
FEH
R36
R37
00H
01H
02H
03H
FFH
Table 5–10. -Contrast Value Setting and Electronic Volume Register
VPH
VNH
VPL
VNL
-curve.
VPH
VNH
VNL
VPL
V
GPH7
GNH7
V
SS
S
0
0
0
0
1
1
GPH6
GNH6
Positive polarity, black
Negative polarity, white
Positive polarity, black
Negative polarity, white
Figure 5–23. Relationship of TFT Drive Voltage (normally white)
0
0
0
0
1
1
256) x V
GPH5
GNH5
Drive level
0
0
0
0
1
1
Positive polarity
S
GNH4
GPH4
0
0
0
0
1
1
Data Sheet S15649EJ2V0DS
GPH3
GNH3
0
0
0
0
1
1
Contrast value setting register 1
Contrast value setting register 2
Contrast value setting register 3
Contrast value setting register 4
GNH2
GPH2
0
0
0
0
1
1
Negative polarity
GPH1
GNH1
0
0
1
1
1
1
Setting register
GNH0
GPH0
can be set as shown in Table 5–
0
1
0
1
0
1
Setting 1 (VPH, VNL)
Fixed to V
White
Black
value setting or
status setting
S
255
254
253
(amplifier OFF)
PD161622
2
1
R36
R37
R38
R39