JPS60133499U - LED array drive circuit - Google Patents
LED array drive circuitInfo
- Publication number
- JPS60133499U JPS60133499U JP2111584U JP2111584U JPS60133499U JP S60133499 U JPS60133499 U JP S60133499U JP 2111584 U JP2111584 U JP 2111584U JP 2111584 U JP2111584 U JP 2111584U JP S60133499 U JPS60133499 U JP S60133499U
- Authority
- JP
- Japan
- Prior art keywords
- drive
- led
- terminal
- transistor
- drive circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は、ＬＥＤアレイチップを駆動する従来の駆動回
路全体を示すブロック図、第２図及び第３図は本考案に
よるＬＥＤアレイ駆動回路の実施例を示す要部ブロック
図である。
主な図番の説明、１．土上、１ス・・・ＬＥＤアレイチ
ップ、２，１５．２０・・・駆動用ＩＣｌ３，１６．２
１−ＬＥＤドライバ、１２ａ、１２ｂ〜１２ｎｔ ２
４ａｔ ２４ｂ〜２４ｎ・・・ＬＥＤ、１６ａ、１６
ｂ〜１６ｎ・・・ＰチャンネルＭＯＳトランジスタ、２
２ａ＋２２ｂ〜２２ｎ・・・ＮチャンネルＭＯ３）ラン
ジスタ。FIG. 1 is a block diagram showing an entire conventional driving circuit for driving an LED array chip, and FIGS. 2 and 3 are block diagrams showing essential parts of an embodiment of the LED array driving circuit according to the present invention. Explanation of main figure numbers, 1. On the ground, 1st... LED array chip, 2, 15.20... Drive ICl 3, 16.2
1-LED driver, 12a, 12b~12nt 2
4at 24b-24n...LED, 16a, 16
b~16n...P channel MOS transistor, 2
2a+22b~22n...N channel MO3) transistor.
Claims (1)
れ、該共通接続端子が電源の一方の端子に接続され、且
つ、各々のアノードあるいはカソードが別々の駆動用端
子に接続された複数のＬＥＤより成るＬＥＤアレイを駆
動する駆動回路において、前記各駆動用端子に各々ＬＥ
Ｄ駆動用ＭＯ３Ｉ−ランジスタの一端を直接接続し、該
各ＬＥＤ駆動用ＭＯＳトランジスタの他端を共通に前記
電源の他方の端子に接続すると共に、前記ＬＥＤ駆動用
ＭＯ８）ランジスタのオン時降下電圧■。８が電源電圧
ＶＤＩ）とＬＥＤ順方向降下電ｉｖｐとの差電圧■ＤＤ
ＶＦに略等しくなるように前記ＬＥＤ駆動用ＭＯＳ
トランジスタのオン抵抗を設定したことを特徴とするＬ
ＥＤアレイ駆動回路。Each cathode or anode is common! In a drive circuit for driving an LED array consisting of a plurality of LEDs connected to each other, the common connection terminal is connected to one terminal of a power supply, and each anode or cathode is connected to a separate drive terminal, LE for each drive terminal
One end of the D drive MO3I transistor is directly connected, and the other end of each LED drive MOS transistor is commonly connected to the other terminal of the power supply, and the voltage drop when the LED drive MO8) transistor is turned on is . 8 is the difference voltage ■DD between the power supply voltage VDI) and the LED forward drop voltage ivp
The LED driving MOS is set to be approximately equal to VF.
L characterized by setting the on-resistance of the transistor.
ED array drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2111584U JPS60133499U (en) | 1984-02-15 | 1984-02-15 | LED array drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2111584U JPS60133499U (en) | 1984-02-15 | 1984-02-15 | LED array drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60133499U true JPS60133499U (en) | 1985-09-05 |
Family
ID=30512219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2111584U Pending JPS60133499U (en) | 1984-02-15 | 1984-02-15 | LED array drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60133499U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015184287A (en) * | 2014-03-20 | 2015-10-22 | パイオニア株式会社 | Light emitting device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58137890A (en) * | 1982-02-10 | 1983-08-16 | 松下電器産業株式会社 | Display driving circuit |
-
1984
- 1984-02-15 JP JP2111584U patent/JPS60133499U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58137890A (en) * | 1982-02-10 | 1983-08-16 | 松下電器産業株式会社 | Display driving circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015184287A (en) * | 2014-03-20 | 2015-10-22 | パイオニア株式会社 | Light emitting device |
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