JPS63172917U - - Google Patents
Info
- Publication number
- JPS63172917U JPS63172917U JP6511887U JP6511887U JPS63172917U JP S63172917 U JPS63172917 U JP S63172917U JP 6511887 U JP6511887 U JP 6511887U JP 6511887 U JP6511887 U JP 6511887U JP S63172917 U JPS63172917 U JP S63172917U
- Authority
- JP
- Japan
- Prior art keywords
- power source
- generator
- instruments
- illumination
- changes
- 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)
- Details Of Measuring And Other Instruments (AREA)
Description
第１図は本考案の第１実施例を示す回路図、第
２図はデユーテイ変換器の動作特性を示す図、第
３図は本考案の第２実施例を示す回路図、第４図
は第２実施例の適用例を示した図、第５図は従来
例を示した図である。
１……電源、２……発電機、４……照明灯、５
……トランジスタ、１０……デユーテイ変換器。
Fig. 1 is a circuit diagram showing the first embodiment of the present invention, Fig. 2 is a diagram showing the operating characteristics of the duty converter, Fig. 3 is a circuit diagram showing the second embodiment of the invention, and Fig. 4 is a diagram showing the operating characteristics of the duty converter. FIG. 5 is a diagram showing an example of application of the second embodiment, and FIG. 5 is a diagram showing a conventional example. 1... Power source, 2... Generator, 4... Lighting light, 5
...Transistor, 10...Duty converter.
Claims (1)
を充電するための電源と、この電源の電力を消費
して照明を行う照明灯を備えた回路において、前
記電源及び発電機の電圧の変化によつて、出力信
号であるパルス信号のデユーテイ比を変化させる
デユーテイ変換器と、前記デユーテイ変換器の出
力パルス信号の出力状態によつてオン、オフを繰
り返すスイツチング用のトランジスタで、前記照
明灯の照明時間を調節することを特徴とする計器
等の自動輝度調節装置。 In a circuit equipped with a power source for charging electric power generated by a generator such as an engine or a motor, and a lighting lamp that consumes electric power from this power source to provide illumination, changes in the voltage of the power source and generator The illumination time of the illumination lamp is controlled by a duty converter that changes the duty ratio of the pulse signal that is the output signal, and a switching transistor that repeatedly turns on and off depending on the output state of the output pulse signal of the duty converter. An automatic brightness adjustment device for instruments, etc., which is characterized by adjusting the brightness of instruments, etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6511887U JPS63172917U (en) | 1987-04-28 | 1987-04-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6511887U JPS63172917U (en) | 1987-04-28 | 1987-04-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63172917U true JPS63172917U (en) | 1988-11-10 |
Family
ID=30901900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6511887U Pending JPS63172917U (en) | 1987-04-28 | 1987-04-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63172917U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5615600B2 (en) * | 1973-12-27 | 1981-04-10 | ||
| JPS5925421B2 (en) * | 1979-08-24 | 1984-06-18 | 大日本スクリ−ン製造株式会社 | Recording position control method in image scanning recording device |
-
1987
- 1987-04-28 JP JP6511887U patent/JPS63172917U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5615600B2 (en) * | 1973-12-27 | 1981-04-10 | ||
| JPS5925421B2 (en) * | 1979-08-24 | 1984-06-18 | 大日本スクリ−ン製造株式会社 | Recording position control method in image scanning recording device |
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