JPS5995219U - Display dimmer - Google Patents
Display dimmerInfo
- Publication number
- JPS5995219U JPS5995219U JP19114982U JP19114982U JPS5995219U JP S5995219 U JPS5995219 U JP S5995219U JP 19114982 U JP19114982 U JP 19114982U JP 19114982 U JP19114982 U JP 19114982U JP S5995219 U JPS5995219 U JP S5995219U
- Authority
- JP
- Japan
- Prior art keywords
- light source
- circuit
- pulse
- reference voltage
- wave
- 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
- 230000010355 oscillation Effects 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000000737 periodic effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
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図は従来の調光特性を示す図、第2図は本考案の一
実施例を示す回路図、及び第3図は第2図に示す装置の
調光特性を示す図である。
S□・・・・・・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
3インチ)、LD・・・・・・ランプ(光源)−1E・
・・・・・バッテリイ(電源)、1・・・・・・光源駆
動回路、2・・・・・・発振回路、3・・・・・・波形
整形回路、4・・・・・・電圧シフト回路。FIG. 1 is a diagram showing conventional dimming characteristics, FIG. 2 is a circuit diagram showing an embodiment of the present invention, and FIG. 3 is a diagram showing dimming characteristics of the device shown in FIG. 2. S□...Ignition switch (main switch), SL...Light control switch (sub 3 inch), LD...Lamp (light source) -1E.
... Battery (power supply), 1 ... Light source drive circuit, 2 ... Oscillation circuit, 3 ... Waveform shaping circuit, 4 ... Voltage shift circuit.
Claims (1)
るようになされた表示器の光源と直列に−接続された光
源駆動回路と、三角波、鋸歯状波1、正弦波などのよう
な、少なくとも漸増部分、漸減部分の一方を有する一定
周波数を発生する発振回路と、該発振回路からの周期波
と調整可能な基準電圧とを比較し、基準電圧レベルに応
じたデユーティ比のパルスを形成する斡形整形回路点、
前記基準電圧のレベルを前記副スィッチのオン時にシフ
トする電圧シフト回路とを備え、前記波形整形回路から
のパルスを前記光源駆動回路に加えてパルスのデユーテ
ィ比に応じた明るさで光源を点灯 、するようにした
ことを特徴とする表示器用調光装置。A light source driving circuit connected in series with the light source of the display, which is adapted to be connected to the power supply by turning on the main switch or the sub-switch, and at least a gradual increase, such as a triangular wave, a sawtooth wave, a sine wave, etc. An oscillation circuit that generates a constant frequency having one of a partial and a gradually decreasing portion, and a square waveform that compares the periodic wave from the oscillation circuit with an adjustable reference voltage and forms a pulse with a duty ratio according to the reference voltage level. shaping circuit point,
a voltage shift circuit that shifts the level of the reference voltage when the sub switch is turned on, and applies a pulse from the waveform shaping circuit to the light source drive circuit to turn on the light source with a brightness according to a duty ratio of the pulse; A dimmer for a display device, characterized in that:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19114982U JPS5995219U (en) | 1982-12-20 | 1982-12-20 | Display dimmer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19114982U JPS5995219U (en) | 1982-12-20 | 1982-12-20 | Display dimmer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5995219U true JPS5995219U (en) | 1984-06-28 |
Family
ID=30411699
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19114982U Pending JPS5995219U (en) | 1982-12-20 | 1982-12-20 | Display dimmer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5995219U (en) |
-
1982
- 1982-12-20 JP JP19114982U patent/JPS5995219U/en active Pending
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