UPD160083 NEC, UPD160083 Datasheet - Page 6

• Manufacturer Part Number: UPD160083
• Description: 480-OUTPUT TFT-LCD SOURCE DRIVER
• Manufacturer: NEC

4. RELATIONSHIP BETWEEN INPUT DATA AND OUTPUT VOLTAGE VALUE
gray scale voltages of differing polarity with respect to the LCD’s counter electrode (common electrode) voltage. The
D/A converter consists of ladder resistors and switches. The ladder resistors (r0 to r255) are designed so that the ratio
of LCD panel -compensated voltages to V
indicates figure 4 2. For the 2 sets of 9 -compensated power supplies, V
scale voltages of the same polarity with respect to the common voltage
0.5 V
input data and the output voltage.
6
The PD160083 incorporates a 8-bit D/A converter whose odd output pins and even output pins output respectively
Figure 4 1 shows the relationship between the driving voltages such as liquid-crystal driving voltages V
Figures 4 2 shows -corrected voltages and ladder resistors ratio and figure 4 3 shows relationship between the
DD2
V
0.5 V
, and -corrected voltages V
DD2
0.1 V
0.1 V
– 0.1 V
DD2
0.5 V
Figure 4 1. Relationship Between Input Data and -corrected Power Supply
V
9
V
V
>V
V
V
DD2
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
SS2
DD2
V
17
16
10
11
12
13
14
9
15
0
1
2
3
4
5
6
8
7
10
0
>V
>V
00 01
1
11
>V
>V
2
>V
12
>V
20
3
>V
13
0
Preliminary Product Information S16450EJ1V0PM00
-V
>V
4
>V
17
14
and the input data. Be sure to maintain the voltage relationships below.
5
0
>V
’-V
>V
40
15
255
6
>V
>V
’ and V
7
16
>V
>V
Input data (HEX.)
8
17
0
”-V
0.5 V
V
255
80
SS2
” is almost equivalent, therefore, each resistance value
DD2
+ 0.1 V
0
-V
C0
8
and V
E0
9
-V
17
, respectively, input gray
FE
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FF
PD160083
1
31
32
64
64
64
64
32
31
30
30
32
1
1
1
DD2
32
, V
SS2
and