JPS5995218U - Display dimmer - Google Patents
Display dimmerInfo
- Publication number
- JPS5995218U JPS5995218U JP19114882U JP19114882U JPS5995218U JP S5995218 U JPS5995218 U JP S5995218U JP 19114882 U JP19114882 U JP 19114882U JP 19114882 U JP19114882 U JP 19114882U JP S5995218 U JPS5995218 U JP S5995218U
- Authority
- JP
- Japan
- Prior art keywords
- light source
- transistor
- pulse
- switch
- switching transistor
- 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
- Details Of Measuring Devices (AREA)
- Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は調光装置の調光モードを示す説明図、 。
第２図は第１図に示すモードを実現するための従来例を
示す回路図、及び第３図は本考案の一実施例を葉す回路
図である。
Ｓｌ・・・・・・イグニッションスイッチ（主スィッチ
）、ＳＬ・・・・・・ライトコントロールスイッチ（副
スィッチ）、Ｅ・・・・・・パツテリイ（電源）、ＬＤ
・・・・・・ランプ（光源）、Ｑｌ、Ｑ２・・・・・・
スイッチングトランジスタ、ＶＲ・・・・・・可変抵抗
器（調整素子）、１０・・・・・・光源駆動回路、１１
・・・・・・パルス発生回路、１２・・・・・・駆動ル
制御回路。FIG. 1 is an explanatory diagram showing the dimming mode of the dimming device. FIG. 2 is a circuit diagram showing a conventional example for realizing the mode shown in FIG. 1, and FIG. 3 is a circuit diagram showing an embodiment of the present invention. SL: Ignition switch (main switch), SL: Light control switch (sub switch), E: Power supply (power supply), LD
...Lamp (light source), Ql, Q2...
Switching transistor, VR... Variable resistor (adjustment element), 10... Light source drive circuit, 11
. . . Pulse generation circuit, 12 . . . Drive control circuit.
Claims (1)
るようになされた表示器の光源と直列に接続されたスイ
ッチングトランジスタと前記主スィッチ、副スィッチの
一方又は両方のオンにより前記トランジスタをオン状態
にバイアスするバイアス回路とを有し、該トランジスタ
のオンの間前記光源に通電を行う光源駆動回路と、出力
パルスのデユーティ比を変える可変抵抗器等の調整素子
を有し、前記副スィッチのオンにより前記デユーティ比
をもったパルスを出力するパルス発生回路と、該パルス
発生回路からめパルスによってオン・オフされるスイッ
チングトランジスタを有し、該トランジスタのオン期間
の間前記光源駆動回路のスイッチングトランジスタをオ
フさせる駆動制御回路とを備えることを特徴どする表示
器用調光装置。A switching transistor connected in series with the light source of the display device is connected to a power source by turning on the main switch or the sub-switch, and the transistor is turned on by turning on one or both of the main switch and the sub-switch. a light source drive circuit that applies current to the light source while the transistor is on; and an adjustment element such as a variable resistor that changes the duty ratio of the output pulse; It has a pulse generation circuit that outputs a pulse having the duty ratio, and a switching transistor that is turned on and off by the pulse from the pulse generation circuit, and turns off the switching transistor of the light source driving circuit during the on period of the transistor. A dimmer for a display device, comprising: a drive control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19114882U JPS5995218U (en) | 1982-12-20 | 1982-12-20 | Display dimmer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19114882U JPS5995218U (en) | 1982-12-20 | 1982-12-20 | Display dimmer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5995218U true JPS5995218U (en) | 1984-06-28 |
Family
ID=30411697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19114882U Pending JPS5995218U (en) | 1982-12-20 | 1982-12-20 | Display dimmer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5995218U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62134344A (en) * | 1985-12-06 | 1987-06-17 | Fujitsu Ten Ltd | Dimmer circuit for vehicle-loaded equipment indicating part |
-
1982
- 1982-12-20 JP JP19114882U patent/JPS5995218U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62134344A (en) * | 1985-12-06 | 1987-06-17 | Fujitsu Ten Ltd | Dimmer circuit for vehicle-loaded equipment indicating part |
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