CN201336745Y - Continuously adjustable stepless light-dimming device of alarm lamp - Google Patents
Continuously adjustable stepless light-dimming device of alarm lamp Download PDFInfo
- Publication number
- CN201336745Y CN201336745Y CNU2007200826360U CN200720082636U CN201336745Y CN 201336745 Y CN201336745 Y CN 201336745Y CN U2007200826360 U CNU2007200826360 U CN U2007200826360U CN 200720082636 U CN200720082636 U CN 200720082636U CN 201336745 Y CN201336745 Y CN 201336745Y
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- light
- lamp
- alarm
- dimming
- power tube
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Abstract
The utility model discloses a continuously adjustable stepless light-dimming device of an alarm lamp. The light-dimming device comprises the connecting alarm lamp which is electrically connected with a control circuit, and an alarm light-dimming circuit. A light-dimming potential device is arranged on the alarm light-dimming circuit and is respectively connected with an upper limit voltage-limiting resistor (R1) and a lower limit voltage-limiting resistor (R2). A voltage-distributing network composed by the alarm light-dimming circuit controls base current of a power tube which is electrically connected by a center tap of the potential device, and DC voltage is added onto a collector electrode of the power tube and is output onto the alarm lamp in a display zone and a current-limiting resistor by an emitting electrode of the power tube. By replacing the method of the switching of the current-limiting resistor by a switch in the prior art with the linear adjustment and power amplification of the potential device, the continuously adjustable stepless light-dimming device eliminates adjusting dead zones caused due to a high brightness LED (light emitting diode) lamp does not emit light when start voltage is within 0 to 1.5V, and can adjust display brightness from continuously stepless non-brightness to the highest brightness, so as to satisfy the requirements for the display brightness in various lighting environments without interfering other equipment on a machine.
Description
Technical field
The utility model relates to a light modulating device that is used for the alarm indicator of light alarm display brightness on the aircraft.
Background technology
In the prior art, be installed in the alarm indicator of aircraft, usually by alarm light adjusting circuit control shown in Figure 2.Because the ambient light high contrast is very big round the clock, if the passenger cabin alarm indicator shows that with same brightness it is dazzling then to understand perceived brightness at night, and do not see Chu daytime under the sunlight direct projection, influence pilot's vision and flight safety, therefore, alarm indicator brightness needs to regulate on the aircraft.In the prior art, adopt " daytime/night " diverter switch, when night, in the stand by lamp circuit of every road, increased a fixing current-limiting resistance, reduced display brightness.The weak point of this light adjusting circuit is only to have two kinds of brightness available, can not satisfy the brightness needs under the various illumination conditions fully, and different pilots' sensitization difference, the pilot is reflected uncomfortable, brightness is dazzling under the particularly night flight condition feels bad, and influences flight safety.
The utility model is further improvement of existing technologies and development.
Summary of the invention
For overcoming the weak point that above-mentioned prior art exists, make each pilot the alarm display brightness can be adjusted to most suitable brightness under various illumination conditions, the utility model provides a kind of can be satisfied under various photoenvironments, different pilot is to the requirement of display brightness; In adjustment process, can not cause interference to other equipment on the aircraft; And the stand by lamp stepless dimming device that can regulate continuously.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of continuously adjustable stand by lamp stepless dimming device, comprise, be electrically connected the connection stand by lamp and the alarm light adjusting circuit of control circuit, it is characterized in that, the light adjusting potentiometer that contains connect respectively a upper voltage limit pressure limiting resistance (R1) and a lower voltage limit pressure limiting resistance (R2) on the alarm light adjusting circuit, the potential-divider network of circuit formation is by the power tube base current of potentiometer centre cap control electrical connection thus, direct voltage is added on the collector electrode of this power tube, and the emitter by described power tube outputs on viewing area stand by lamp and the current-limiting resistance.
The utility model has following beneficial effect than prior art.
The linear stepless dimming circuit of alarm after improving replaces the prior art switch to switch the current-limiting resistance mode with potentiometer linear regulation and power amplification.By potentiometer linear regulation and power amplification, display brightness can be transferred to from unglazed continuous stepless the brightest, thereby can satisfy under various photoenvironments, different pilot is to the requirement of display brightness.In adjustment process, the continuous linear change of voltage can not cause interference to other equipment on the machine; The light modulation electric current outputs on the indicator light by the power tube amplification, and power output is big, can satisfy the power reguirements of multichannel stand by lamp; The upper voltage limit pressure limiting resistance that seals in can reduce the ceiling voltage that potentiometer is regulated output, thereby reduces the caloric value of viewing area indicator light and current-limiting resistance, has improved the reliability of equipment; The lower voltage limit pressure limiting resistance of lower end series connection has been eliminated the high brightness LED lamp starting voltage in 0～1.5V adjusting dead band of luminous generation not, and it is adjustable to make its display brightness have a continuous stepless.
Description of drawings
Fig. 1 is a stand by lamp stepless dimming circuit diagram of the present utility model.
Fig. 2 is prior art stand by lamp light adjusting circuit figure.
Embodiment
In the alarm light adjusting circuit block diagram that Fig. 1 describes, light adjusting potentiometer W upper end is in series with a upper voltage limit pressure limiting resistance R 1, and series connection lower voltage limit ground connection pressure limiting resistance R 2 in lower end constitutes potential-divider network with this potentiometer.This potential-divider network passes through the base stage that this potentiometer central slide tap connects power tube G, the size of power controlling pipe G base current, and the 28V direct voltage is added to the power tube collector electrode, and the power tube emitter outputs on the alarm indicator and current-limiting resistance of viewing area.The stand by lamp of alarm viewing area is made up of the Light-Emitting Diode array of display of several high brightness, and is controlled by ON-OFF control circuit.The upper voltage limit pressure limiting resistance R 1 of potentiometer upper end series connection can reduce the ceiling voltage that potentiometer is regulated output, 28V direct voltage on the aircraft can be dropped to needed value, thereby reduce the caloric value of viewing area indicator light and current-limiting resistance, improved the reliability of equipment.Because of there is starting voltage in Light-Emitting Diode, Light-Emitting Diode will can not lighted in 0～1.5V starter value scope, will have the dead band of voltage-regulation.Lower voltage limit pressure limiting resistance R 2 by the series connection of potentiometer W lower end is limited in Light-Emitting Diode with adjustable minimum voltage and exists on the starting voltage value, and the interior display brightness of whole adjustment stroke of potentiometer is changed continuously, does not have the dead band of adjusting.
Claims (2)
1. continuously adjustable stand by lamp stepless dimming device, comprise, be electrically connected the connection stand by lamp and the alarm light adjusting circuit of control circuit, it is characterized in that, the light adjusting potentiometer that contains connect respectively a upper voltage limit pressure limiting resistance R 1 and a lower voltage limit pressure limiting resistance R 2 on the alarm light adjusting circuit, the potential-divider network of circuit formation is by the power tube base current of potentiometer centre cap control electrical connection thus, direct voltage is added on the collector electrode of this power tube, and the emitter by described power tube outputs on viewing area stand by lamp and the current-limiting resistance.
2. continuously adjustable stand by lamp stepless dimming device according to claim 1 is characterized in that described stand by lamp is made up of the Light-Emitting Diode array of display of several high brightness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200826360U CN201336745Y (en) | 2007-12-21 | 2007-12-21 | Continuously adjustable stepless light-dimming device of alarm lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200826360U CN201336745Y (en) | 2007-12-21 | 2007-12-21 | Continuously adjustable stepless light-dimming device of alarm lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201336745Y true CN201336745Y (en) | 2009-10-28 |
Family
ID=41288409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200826360U Expired - Lifetime CN201336745Y (en) | 2007-12-21 | 2007-12-21 | Continuously adjustable stepless light-dimming device of alarm lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201336745Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102523664A (en) * | 2012-01-09 | 2012-06-27 | 广州南科集成电子有限公司 | Light modulator for narrow voltage light-emitting diode (LED) lamp |
| CN104582137A (en) * | 2014-11-28 | 2015-04-29 | 上海航空电器有限公司 | Multistage dimming circuit providing three types of warning signals |
-
2007
- 2007-12-21 CN CNU2007200826360U patent/CN201336745Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102523664A (en) * | 2012-01-09 | 2012-06-27 | 广州南科集成电子有限公司 | Light modulator for narrow voltage light-emitting diode (LED) lamp |
| CN104582137A (en) * | 2014-11-28 | 2015-04-29 | 上海航空电器有限公司 | Multistage dimming circuit providing three types of warning signals |
| CN104582137B (en) * | 2014-11-28 | 2019-01-04 | 上海航空电器有限公司 | The multi-level dimming circuit of three kinds of alarm signals |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091028 |
|
| CX01 | Expiry of patent term |