UPD160062 NEC, UPD160062 Datasheet - Page 6
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UPD160062
Manufacturer Part Number
UPD160062
Description
420-OUTPUT TFT-LCD SOURCE DRIVER
Manufacturer
NEC
Datasheet
1.UPD160062.pdf
(18 pages)
5. 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.
and V
respectively, input gray scale voltages of the same polarity with respect to the common voltage. When fine gray scale
voltage precision is not necessary, there is no need to connect a voltage follower circuit to the
supplies V
common electrode potential V
voltage relationships of
between the input data and the output voltage.
6
The
The ladder resistors (r0 to r62) are designed so that the ratio of LCD panel
Figure 5−1 shows the relationship between the driving voltages such as liquid-crystal driving voltages V
Figures 5−2 shows
0.1 V
0.1 V
µ
0
” to V
PD160062 incorporates a 6-bit D/A converter whose odd output pins and even output pins output respectively
V
0.5 V
1
0.5 V
DD2
to V
63
V
V
V
COM
−0.1 V ≥ V
DD2
V
V
V
V
DD2
V
V
” is almost equivalent. For the 2 sets of five
DD2
V
V
V
SS2
V
1
2
3
4
5
6
8
0
7
3
9
Figure 5−1. Relationship between Input Data and
and V
≥ V
γ
5
-corrected power supply voltage and ladder resistors ratio and figure 5−3 shows the relationship
> V
6
00
0
to V
> V
6
> V
8
1
.
COM
> V
7
> V
, and
2
> V
8
> V
3
> V
γ
9
10
-corrected voltages V
≥ V
4
SS2
≥ 0.5 V
Data Sheet S16449EJ1V0DS
+0.1 V
DD2
Input data (HEX)
20
γ
-compensated power supplies, V
0
to V
γ
9
-corrected Power Supplies
and the input data. Be sure to maintain the
30
γ
-compensated voltages to V
γ
3F
0
-compensated power
www.DataSheet4U.com
to V
µ
4
Split interval
and V
DD2
PD160062
16
16
16
16
15
15
16
16
and V
0
’ to V
5
to V
SS2
63
9
’
,
,