參數(shù)資料
型號(hào)： UPD16772
廠商： NEC Corp.
英文描述： 480-OUTPUT TFT-LCD SOURCE DRIVER COMPATIBLE WITH 64-GRAY SCALES
中文描述： 480輸出的TFT - LCD源驅(qū)動(dòng)程序完全兼容64灰度
文件頁(yè)數(shù)： 6/20頁(yè)
文件大?。?/td> 121K
代理商： UPD16772
Data Sheet S14416EJ1V0DS00
6
μ
PD16772
5. RELATIONSHIP BETWEEN INPUT DATA AND OUTPUT VOLTAGE VALUE
The
μ
PD16772 incorporates a 6-bit D/A converter whose odd output pins and even output pins output respectively
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 r62) are designed so that the ratio of LCD panel
γ
-compensated voltages to V
0
’ to V
63
’
and V
0
” to V
63
” is almost equivalent. For the 2 sets of five
γ
-compensated power supplies, V
0
to V
4
and V
5
to V
9
,
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
γ
-compensated
power supplies V
1
to V
3
and V
6
to V
8
.
Figure 5–1 shows the relationship between the driving voltages such as liquid-crystal driving voltages V
DD2
and V
SS2
,
common electrode potential V
COM
, and
γ
-corrected voltages V
0
to V
9
and the input data. Be sure to maintain the
voltage relationships of V
DD2
– 0.1 V > V
0
> V
1
> V
2
> V
3
> V
4
> 0.5 V
DD2
> V
5
> V
6
> V
7
> V
8
> V
9
> V
SS2
+ 0.1 V
Figures 5–2 and 5–3 show the relationship between the input data and the output voltage and the resistance values
of the resistor strings.
Figure 5–1. Relationship between Input Data and
γ
-corrected Power Supplies
V
1
V
2
V
3
V
4
V
SS2
00
10
20
30
3F
V
0
V
6
V
7
V
8
V
DD2
16
V
9
16
16
16
15
Split interval
0.1 V
0.1 V
Input data (HEX)
15
16
16
V
COM
V
5
相關(guān)PDF資料
PDF描述
UPD16772N 480-OUTPUT TFT-LCD SOURCE DRIVER COMPATIBLE WITH 64-GRAY SCALES
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UPD16772A 制造商:NEC 制造商全稱:NEC 功能描述:480-OUTPUT TFT-LCD SOURCE DRIVER COMPATIBLE WITH 64-GRAY SCALES
UPD16772AN 制造商:NEC 制造商全稱:NEC 功能描述:480-OUTPUT TFT-LCD SOURCE DRIVER COMPATIBLE WITH 64-GRAY SCALES
UPD16772B 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UPD16772B Data Sheet | Data Sheet[07/2002]
UPD16772N 制造商:NEC 制造商全稱:NEC 功能描述:480-OUTPUT TFT-LCD SOURCE DRIVER COMPATIBLE WITH 64-GRAY SCALES
UPD16780 制造商:NEC 制造商全稱:NEC 功能描述:288/300 OUTPUT TFT-LCD SOURCE DRIVER
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