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參數(shù)資料
| 型號： | UPD16641 |
| 廠商： | NEC Corp. |
| 英文描述： | SOURCE DRIVER FOR 240-OUTPUT TFT-LCD 64 GRAY SCALES |
| 中文描述： | 240源驅(qū)動器輸出的TFT - LCD 64灰度 |
| 文件頁數(shù)： | 7/20頁 |
| 文件大小： | 151K |
| 代理商： | UPD16641 |
7
μ
PD16641
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 of 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
9
(gray scale voltages in 8
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 8
steps of the resistor ladder circuits of the
μ
PD16641, and no current flows into the
γ
-corrected power pins V
1
through
V
9
. As a result, a voltage follower circuit is not necessary.
–
+
V
0
i
0
–
+
V
1
i
1
–
+
V
2
i
2
–
+
V
3
i
3
–
+
V
4
i
4
–
+
V
5
i
5
–
+
V
6
i
6
–
+
V
7
i
7
–
+
V
8
i
8
–
+
V
9
i
9
–
+
V
10
i
10
R
0
= 1.81 k
R
1
=
Σ
r
i
= 3.57 k
i=1
R
9
= 13.5 k
7
R
2
=
Σ
r
i
= 3.12 k
i=1
8
R
3
=
Σ
r
i
= 3.08 k
i=1
8
R
4
=
Σ
r
i
= 2.90 k
i=1
8
R
5
=
Σ
r
i
= 2.32 k
i=1
8
R
6
=
Σ
r
i
= 3.35 k
i=1
8
R
7
=
Σ
r
i
= 3.23 k
i=1
8
R
8
=
Σ
r
i
= 4.75 k
i=1
7
γ
-corrected power pin
γ
-corrected resistor
PD16641
μ
Sum of eight
γ
-corrected resistors
相關PDF資料 |
PDF描述 |
|---|---|
| UPD16641N | SOURCE DRIVER FOR 240-OUTPUT TFT-LCD 64 GRAY SCALES |
| UPD16647 | 402/384-OUTPUT TFT-LCD SOURCE DRIVER 64 GRAY SCALE |
| UPD16647N | 402/384-OUTPUT TFT-LCD SOURCE DRIVER 64 GRAY SCALE |
| UPD16650N-XXX | Interface IC |
| UPD16650 | 120-/128-OUTPUT TFT-LCD GATE DRIVER |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD166413T1F-E1 | 制造商:NEC Electronics Corporation 功能描述: |
| UPD166413T1FSSA | 制造商:NEC Electronics Corporation 功能描述: |
| UPD16641N | 制造商:NEC 制造商全稱:NEC 功能描述:SOURCE DRIVER FOR 240-OUTPUT TFT-LCD 64 GRAY SCALES |
| UPD16641N-XXX | 制造商:NEC 制造商全稱:NEC 功能描述:Interface IC |
| UPD16647 | 制造商:NEC 制造商全稱:NEC 功能描述:402/384-OUTPUT TFT-LCD SOURCE DRIVER 64 GRAY SCALE |
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