JPS61158531U - - Google Patents
Info
- Publication number
- JPS61158531U JPS61158531U JP4232485U JP4232485U JPS61158531U JP S61158531 U JPS61158531 U JP S61158531U JP 4232485 U JP4232485 U JP 4232485U JP 4232485 U JP4232485 U JP 4232485U JP S61158531 U JPS61158531 U JP S61158531U
- Authority
- JP
- Japan
- Prior art keywords
- room lamp
- control voltage
- duty
- circuit
- fade
- 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.)
- Granted
Links
- 230000010355 oscillation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)
Description
第１図は本考案に係るルームランプフエードア
ウトの実施例を示す回路図、第２図は第１図回路
の各部波形図、第３図は本考案の他の実施例を示
す回路図、第４図は従来のフエードアウト回路を
示す回路図、第５図は第４図回路の各部波形図、
第６図は本考案及び従来のフエードアウト回路に
おける電圧制御型デユーテイコントロール回路の
実施例を示す回路図である。
Ａ……電圧制御型デユーテイコントロール回路
、ＩＣ２，ＩＣ３……演算増幅器、Ｔｒ１，Ｔｒ
２……トランジスタ、Ｌ１……ルームランプ、Ｓ
Ｗ１……ドアスイツチ。
FIG. 1 is a circuit diagram showing an embodiment of the room lamp fade-out according to the present invention, FIG. 2 is a waveform diagram of each part of the circuit in FIG. 1, and FIG. 3 is a circuit diagram showing another embodiment of the present invention. Figure 4 is a circuit diagram showing a conventional fade-out circuit, Figure 5 is a waveform diagram of each part of the circuit in Figure 4,
FIG. 6 is a circuit diagram showing an embodiment of a voltage-controlled duty control circuit in the present invention and a conventional fade-out circuit. A...Voltage controlled duty control circuit, IC2 , IC3 ...Operation amplifier, Tr1 , Tr
2 ...Transistor, L 1 ...Room lamp, S
W 1 ...Door switch.
Claims (1)
圧型デユーテイコントロール回路の発振出力によ
りスイツチング素子をオン・オフさせるルームラ
ンプを点減させることにより徐々に減光するよう
にしたルームランプフエードアウト回路であつて
、前記デユーテイコントロール回路の制御電圧入
力側に利得が可変可能な非反転増幅器を設けたこ
とを特徴とするルームランプフエードアウト回路
。 This is a room lamp fade-out circuit that gradually dims the room lamp by turning the switching element on and off using the oscillation output of a control voltage type duty control circuit whose duty is variable depending on the control voltage. A room lamp fade-out circuit characterized in that a non-inverting amplifier with variable gain is provided on the control voltage input side of the duty control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4232485U JPH0221314Y2 (en) | 1985-03-26 | 1985-03-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4232485U JPH0221314Y2 (en) | 1985-03-26 | 1985-03-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61158531U true JPS61158531U (en) | 1986-10-01 |
| JPH0221314Y2 JPH0221314Y2 (en) | 1990-06-08 |
Family
ID=30552974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4232485U Expired JPH0221314Y2 (en) | 1985-03-26 | 1985-03-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0221314Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005174725A (en) * | 2003-12-11 | 2005-06-30 | Matsushita Electric Works Ltd | Lighting circuit of light-emitting diode and lighting unit using this and light control system |
-
1985
- 1985-03-26 JP JP4232485U patent/JPH0221314Y2/ja not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005174725A (en) * | 2003-12-11 | 2005-06-30 | Matsushita Electric Works Ltd | Lighting circuit of light-emitting diode and lighting unit using this and light control system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0221314Y2 (en) | 1990-06-08 |