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參數(shù)資料
| 型號(hào)： | UPD16647 |
| 廠商： | NEC Corp. |
| 英文描述： | 402/384-OUTPUT TFT-LCD SOURCE DRIVER 64 GRAY SCALE |
| 中文描述： | 402/384-OUTPUT TFT - LCD的源驅(qū)動(dòng)64灰階 |
| 文件頁(yè)數(shù)： | 7/16頁(yè) |
| 文件大?。?/td> | 108K |
| 代理商： | UPD16647 |
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Data Sheet S13607EJ2V0DS00
7
μ
PD16647
4.1
γ
-Corrected Power Circuit
The reference power supply of the D/A converter consists of a ladder circuit with a total of 64 resistors, and
resistance
Σ
ri between
γ
-corrected power pins differs depending on each pair of
γ
-corrected power pins. One pair of
γ
-corrected power pins consists of seven or eight series resistors, and resistance
Σ
ri in the figure below is indicated
as the sum of the seven or eight resistors. The resistance ratio between the
γ
-corrected power pins (
Σ
ri ratio) is
designed to be a value relatively close to the ratio of the
γ
-corrected voltages V
1
through V
8
(gray scale voltages in 7
steps) used in an actual LCD panel. Under ideal conditions where there is no difference between the two, therefore,
there is no voltage difference between the voltage of the
γ
-corrected power supplies and the gray scale voltages in 7
steps of the resistor ladder circuits of the
μ
PD16647, and no current flows into the
γ
-corrected power pins V
1
through
V
8
. As a result, a voltage follower circuit is not necessary.
Figure4–2
.
γ
-Corrected Power Circuit
-corrected power pin
γ
-corrected resister
γ
V
0
V
1
V
2
V
3
V
4
V
5
V
6
V
7
V
8
V
9
i
0
R
0
:
1.98 k
= Σ
r
i
PD16647
μ
i
1
i
2
i
3
i
4
i
5
i
6
i
7
i
8
i
9
γ
-corrected resistors
7
i=1
R
1
:
1.72 k
= Σ
r
i
8
i=1
R
2
:0.86 k
= Σ
r
i
8
i=1
R
3
:
0.99 k
= Σ
r
i
8
i=1
R
4
:
0.73 k
= Σ
r
i
8
i=1
R
5
:
0.79 k
= Σ
r
i
8
i=1
R
6
:1.06 k
= Σ
r
i
8
i=1
R
7
:
1.58 k
= Σ
r
i
7
i=1
R
8
:
6.28 k
Sum of eight
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UPD16647N | 402/384-OUTPUT TFT-LCD SOURCE DRIVER 64 GRAY SCALE |
| UPD16650N-XXX | Interface IC |
| UPD16650 | 120-/128-OUTPUT TFT-LCD GATE DRIVER |
| UPD16650N | 120-/128-OUTPUT TFT-LCD GATE DRIVER |
| UPD16655N-XXX | LCD Display Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD16647N | 制造商:NEC 制造商全稱:NEC 功能描述:402/384-OUTPUT TFT-LCD SOURCE DRIVER 64 GRAY SCALE |
| UPD16647N-XXX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver |
| UPD16650 | 制造商:NEC 制造商全稱:NEC 功能描述:120-/128-OUTPUT TFT-LCD GATE DRIVER |
| UPD16650N | 制造商:NEC 制造商全稱:NEC 功能描述:120-/128-OUTPUT TFT-LCD GATE DRIVER |
| UPD16650N-XXX | 制造商:NEC 制造商全稱:NEC 功能描述:Interface IC |
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