CN88200499U - Automatic illumination-regulating device for keeping illumination constant - Google Patents
Automatic illumination-regulating device for keeping illumination constant Download PDFInfo
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- CN88200499U CN88200499U CN 88200499 CN88200499U CN88200499U CN 88200499 U CN88200499 U CN 88200499U CN 88200499 CN88200499 CN 88200499 CN 88200499 U CN88200499 U CN 88200499U CN 88200499 U CN88200499 U CN 88200499U
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- illumination
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Abstract
The utility model discloses an automatic illumination-regulating device for keeping illumination constant, which can adjust automatically the brightness of a lamp when the table top illumination intensity changes because that the external light intensity changes or the external electric voltage is unsteady to keep the table top illumination intensity constant and invariant. The device can also be used for household lighting and illumination automatic control of public places or applied in energy conservation illumination-regulating devices, but the utility model is not suitable for controlling florescent lamps; the utility model is controlled by a controlled silicon, and the triggering control circuit of the controlled silicon is composed of a light reception compensation amplification circuit, a driving circuit, a photoelectric coupling circuit and a controlled silicon trigger circuit.
Description
This device belongs to a kind of automatic light modulation device.
Existing sight protection desk lamp mainly is made up of manual electronic stepless dimming and normal illumination indication two parts.When table top illumination deficiency or mistake are strong, can come out, go to adjust desk lamp brightness, table top illumination is adjusted in the illumination range that is fit to read by the user by diode displaying.But when the ambient light line strength changes or external voltage when unstable, table top illumination can change, and present desk lamp then can not be adjusted lamp brightness automatically and compensate above-mentioned illumination change.This is existing sight protection desk lamp weak point.
Task of the present utility model provides a kind of constant automatic light modulation device of illumination that keeps, it can extraneous light intensity change or external voltage unstable and when causing the table top illumination change, adjust the brightness of lamp automatically, make the illumination of table top invariable.This device can also or be applied on the energy-saving dimming device as the automatic control of domestic lighting and public place illumination, but is not suitable for the control fluorescent lamp.
The utility model is realized as follows: the brightness of lamp is by SCR control, and the silicon controlled trigger control circuit is made up of light-receiving compensation amplifying circuit, drive circuit, photoelectricity coupling circuit and thyristor gating circuit.When the ambient light line strength changes, photo resistance in the light-receiving compensation amplifying circuit is the variation of the base current of triode with this change transitions, after overcompensation and amplifying, output to drive circuit, after the photoelectricity coupling, change the time constant of thyristor gating circuit, make the silicon controlled output voltage do corresponding the adjustment, as the also corresponding change of brightness of the incandescent lamp of load, played the effect of compensation illumination change like this.Controllable silicon and load be by the 220V mains-supplied in this device, control circuit employing+6V stabilized voltage power supply.
The utility model can extraneous light intensity change or external voltage unstable and when causing the table top illumination change, adjust the brightness of lamp automatically, the illumination of table top is remained unchanged.Like this, just protect people's eyes effectively, reached the purpose of health care.
Below in conjunction with accompanying drawing the utility model is described in detail.
Accompanying drawing is circuit theory diagrams of the present utility model.
The course of work of the present utility model is like this: the photo resistance LR1 in the circuit, semifixed resistor WR1, WR2, resistance R 1 and triode BG1 form light-receiving compensation amplifying circuit, resistance R 2, R3, R4, R5, triode BG2 and LED are formed drive circuit, and resistance R 6, R7, capacitor C 1, C2, photo resistance LR2 and bidirectional trigger diode D form thyristor gating circuit.
LR1, WR1, WR2 constitute the biasing circuit of triode BG1 in light-receiving compensation amplifying circuit, R1 is as the collector load of BG1, when the light intensity that shines LR1 changes, the resistance of the LR1 And that also changes causes the variation of BG1 base current, through the amplification of triode, output to the input of drive circuit by the collector electrode of triode BG1; And behind the R2 of this variable signal in drive circuit, R3 dividing potential drop, be added to the base stage of triode BG2, and so just changed the collector current of BG2, the luminosity of the LED in the photoelectricity coupling is become thereupon.R5 plays current-limiting resistance in drive circuit, R4 is for increasing the emitter resistance of drive circuit stability.When LR2 in the thyristor gating circuit receives the variation of LED luminosity, the resistance of LR2 will become thereupon, thereby changed the time constant of circuits for triggering, change along with time constant, the angle of flow of bidirectional triode thyristor BT also changes, the silicon controlled output voltage is changed, so just reached the purpose of automatic adjustment lamp brightness.
Claims (5)
1, a kind of constant automatic light modulation device of illumination that keeps, it is made up of control section, controllable silicon, power supply and load, it is characterized in that control section compensates amplifying circuit, drive circuit, photoelectricity coupling circuit and thyristor gating circuit by light-receiving and forms.
2, automatic light modulation device according to claim 1 is characterized in that described light-receiving compensates amplifying circuit and is made up of photo resistance LR1, semifixed resistor WR1, WR2, resistance R 5 and triode BG1.
3, automatic light modulation device according to claim 1 is characterized in that described drive circuit is made up of resistance R 2, R3, R4, R5, triode BG2 and LED.
4, automatic light modulation device according to claim 1 is characterized in that described photoelectricity coupling circuit is made up of LED and photo resistance LR2.
5, automatic light modulation device according to claim 1 is characterized in that described thyristor gating circuit is made up of photo resistance LR2, resistance R 6, R7, capacitor C 1, C2 and diac D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88200499 CN88200499U (en) | 1988-01-16 | 1988-01-16 | Automatic illumination-regulating device for keeping illumination constant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88200499 CN88200499U (en) | 1988-01-16 | 1988-01-16 | Automatic illumination-regulating device for keeping illumination constant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN88200499U true CN88200499U (en) | 1988-09-21 |
Family
ID=4835920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88200499 Withdrawn CN88200499U (en) | 1988-01-16 | 1988-01-16 | Automatic illumination-regulating device for keeping illumination constant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN88200499U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101877926A (en) * | 2010-07-08 | 2010-11-03 | 张家炎 | Automatic light-regulating control system |
| CN102802323A (en) * | 2012-09-09 | 2012-11-28 | 刘昭利 | Automatic dimming table lamp |
| CN101720162B (en) * | 2009-11-27 | 2015-01-21 | 海洋王照明科技股份有限公司 | Fluorescent lamp illuminance control circuit, fluorescent lamp control system and control method thereof |
| CN107781655A (en) * | 2016-08-25 | 2018-03-09 | 漳州立达信光电子科技有限公司 | The control method of LED illumination lamp |
| CN108123701A (en) * | 2016-11-30 | 2018-06-05 | 意法半导体有限公司 | Clock-signal generator |
-
1988
- 1988-01-16 CN CN 88200499 patent/CN88200499U/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101720162B (en) * | 2009-11-27 | 2015-01-21 | 海洋王照明科技股份有限公司 | Fluorescent lamp illuminance control circuit, fluorescent lamp control system and control method thereof |
| CN101877926A (en) * | 2010-07-08 | 2010-11-03 | 张家炎 | Automatic light-regulating control system |
| CN102802323A (en) * | 2012-09-09 | 2012-11-28 | 刘昭利 | Automatic dimming table lamp |
| CN107781655A (en) * | 2016-08-25 | 2018-03-09 | 漳州立达信光电子科技有限公司 | The control method of LED illumination lamp |
| CN108123701A (en) * | 2016-11-30 | 2018-06-05 | 意法半导体有限公司 | Clock-signal generator |
| CN108123701B (en) * | 2016-11-30 | 2021-10-29 | 意法半导体有限公司 | Clock signal generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |