CN204425710U - Light-emitting device - Google Patents
Light-emitting device Download PDFInfo
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- CN204425710U CN204425710U CN201420868367.0U CN201420868367U CN204425710U CN 204425710 U CN204425710 U CN 204425710U CN 201420868367 U CN201420868367 U CN 201420868367U CN 204425710 U CN204425710 U CN 204425710U
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- luminescence unit
- light
- photophore
- emitting device
- luminous
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Abstract
The utility model relates to a kind of light-emitting device, comprising: luminescence unit, constant-current drive circuit, controller; Be electrically connected with constant-current drive circuit after at least two luminescence unit series connection, luminescence unit comprises luminous branch road and bypass branch, luminous branch road and bypass branch are connected in parallel, luminous branch road there is photophore, bypass branch has derailing switch, and derailing switch has signal input part, and controller has signal output part, signal input part docks with signal output part, and controller is used for conducting and the cut-off of control switch device.Use single constant-current driving power supply to be that multiple photophore is powered, structure is simple, control is convenient, by controlling different photochromic photophore, precisely controlling light-emitting device and presenting different colors.
Description
Technical field
The utility model relates to a kind of light-emitting device.
Background technology
Existing LED, be use a string LED lamp bead of driving power, the brightness of all lamp pearls is identical, can not control separately the brightness of single lamp pearl and realize light mixing effect.Reach the effect of mixed light, different photochromic lamp pearl illuminated in combination is made to present different colours, need to use multiple driving power to coordinate multiple lamp pearl, each driving power only drives a lamp pearl, causes equipment redundancy, and multiple power supply caloric value is large, when needing the lamp pearl of light modulation more, caloric value is larger, constrains the development of LED mixed light, and causes energy dissipation.
Utility model content
Based on this, the utility model discloses a kind of light-emitting device, uses single constant-current driving power supply to be that multiple photophore is powered, and structure is simple, control is convenient, by controlling different photochromic photophore, precisely controlling light-emitting device and presenting different colors.
Its technical scheme is as follows:
A kind of light-emitting device, comprising: luminescence unit, constant-current drive circuit, controller; Be electrically connected with constant-current drive circuit after at least two luminescence unit series connection, luminescence unit comprises luminous branch road and bypass branch, luminous branch road and bypass branch are connected in parallel, luminous branch road there is photophore, bypass branch has derailing switch, and derailing switch has signal input part, and controller has signal output part, signal input part docks with signal output part, and controller is used for conducting and the cut-off of control switch device.
A kind of light-emitting device control method, controls the time of each luminescence unit luminescence, and different photochromic luminescence unit illuminated in combination presents different colors; For each luminescence unit, when controller sends the first signal to derailing switch, derailing switch ends, and bypass branch disconnects, and the electric current flowing through luminescence unit flows through from luminous branch road, and photophore is luminous; When controller sends secondary signal to derailing switch, derailing switch conducting, bypass branch conducting, the electric current flowing through luminescence unit flows through from bypass branch, and luminous branch road does not have electric current to flow through, and photophore extinguishes.
Wherein in an embodiment, described derailing switch comprises MOSFET pipe and driver module corresponding with it, described MOSFET pipe and the electrical connection of described driver module.
Wherein in an embodiment, described photophore is light-emitting diode.
Wherein in an embodiment, the photochromic difference of each described photophore luminescence.
Wherein in an embodiment, described controller sends pulse width modulating signal, and described pulse width modulating signal comprises described first signal and described secondary signal.
Wherein in an embodiment, it is characterized in that, when arbitrary luminescence unit is luminous, remaining luminescence unit extinguishes.
Below the advantage of preceding solution or principle are described:
1, light-emitting device comprises: luminescence unit, constant-current drive circuit, controller; Be electrically connected with constant-current drive circuit after at least two luminescence unit series connection, luminescence unit comprises luminous branch road and bypass branch, luminous branch road and bypass branch are connected in parallel, the electric current flowing through luminescence unit equals flow through the electric current of luminous branch road and flow through the electric current sum of bypass branch, bypass branch plays the shunting action to luminous branch road, owing to using constant current-supplying, the electric current controlling bypass branch just can control the electric current of luminous branch road;
Luminous branch road has photophore, and when luminous branch road has electric current to flow through, photophore is luminous, and when luminous branch road does not have electric current to flow through, photophore extinguishes;
Bypass branch there is derailing switch, derailing switch is for controlling conducting and the disconnection of bypass branch, derailing switch has signal input part, controller has signal output part, signal input part docks with signal output part, and controller is used for conducting and the cut-off of control switch device, and controller controls the electric current of bypass branch by control switch device, and then control the electric current of luminous branch road, realize the control to photophore luminescence like this;
For whole light-emitting device, control the time of each luminescence unit luminescence, different photochromic luminescence unit illuminated in combination presents different colors;
For each luminescence unit, when controller sends the first signal to derailing switch, derailing switch ends, and bypass branch disconnects, and the electric current flowing through luminescence unit flows through from luminous branch road, and photophore is luminous; When controller sends secondary signal to derailing switch, derailing switch conducting, bypass branch conducting, the electric current flowing through luminescence unit flows through from bypass branch, and luminous branch road does not have electric current to flow through, and photophore extinguishes.
2, described photophore is light-emitting diode; Described derailing switch comprises MOSFET pipe and driver module corresponding with it, described MOSFET pipe and the electrical connection of described driver module; Described controller sends pulse width modulating signal, and described pulse width modulating signal comprises described first signal and described secondary signal;
The brightness of lumination of light emitting diode and the relation of electric current are nonlinear, little current fluctuation will cause light-emitting diode luminance deviation very large, therefore, pulse width modulating signal is adopted to control it, to the time that control light-emitting diode is lighted, when light-emitting diode lights luminescence, its electric current is fixing, so its brightness is fixing, precisely can control photochromic after mixed light with this.
3, the photochromic difference of each described photophore luminescence because adopt pulse width modulating signal to control, so according to the luminescence of setting light-emitting device entirety photochromic and each photophore photochromic, calculate the brightness of this photochromic photophore luminescence; And then, according to the relation of photophore brightness and electric current, calculate fluorescent lifetime and the fall time of photophore, fluorescent lifetime is set to the deadline of derailing switch, fall time is set to the ON time of derailing switch, and photochromic difference, the brightness of each photophore are different, and combination presents abundant color.
4, when arbitrary luminescence unit is luminous, remaining luminescence unit extinguishes; Because the electric current flowing through LED light emitter has impact to the photochromic of LED light emitter, therefore constant-current drive circuit is adopted to power to the luminescence unit of series connection, when arbitrary luminescence unit is luminous, its glow current immobilizes, ensure that its brightness is constant, photochromic constant, when arbitrary luminescence unit is luminous, remaining luminescence unit extinguishes, make the current constant of each luminescence unit, realize the accurate control photochromic to mixed light;
Further, constant-current supply is each only powers to single luminescence unit, and when last luminescence unit extinguishes, can power for next luminescence unit, constant-current drive circuit load is more stable, makes mixed light accurate;
In addition, constant-current drive circuit is powered to single luminescence unit in real time, does not have energy dissipation, improves utilization rate of equipment and installations.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment light-emitting device.
Description of reference numerals:
100, light-emitting diode, 210, MOSFET pipe, 220, gate driver circuit.
Embodiment
Below embodiment of the present utility model is described in detail:
Light-emitting device comprises: luminescence unit, constant-current drive circuit, controller.
Be electrically connected with constant-current drive circuit after three luminescence unit series connection.
Luminescence unit comprises luminous branch road and bypass branch, and luminous branch road and bypass branch are connected in parallel.
Luminous branch road has photophore, and photophore is light-emitting diode 100, the photochromic different difference of each light-emitting diode 100 luminescence.
Bypass branch has derailing switch, and derailing switch comprises MOSFET pipe 210 and gate driver circuit 220, MOSFET pipe 210 corresponding with it and gate driver circuit 220 and is electrically connected, gate driver circuit 220 driven MOS FET pipe 210.
Derailing switch has signal input part, and controller has signal output part, and signal input part docks with signal output part, and controller sends control signal to gate driver circuit 220, the conducting of control MOSFET pipe 210 and cut-off.
When light-emitting device is controlled:
Controller sends pulse width modulating signal, and pulse width modulating signal comprises the first signal and secondary signal, controls the time of each luminescence unit luminescence, and different photochromic luminescence unit illuminated in combination presents different colors;
For each luminescence unit, when controller sends the first signal to derailing switch, derailing switch ends, bypass branch is disconnected, and the electric current flowing through luminescence unit flows through from luminous branch road, and photophore is luminous; When controller sends secondary signal to derailing switch, derailing switch conducting, make bypass branch conducting, the electric current flowing through luminescence unit flows through from bypass branch, and luminous branch road does not have electric current to flow through, and photophore extinguishes;
When arbitrary luminescence unit is luminous, remaining luminescence unit extinguishes.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this specification is recorded.
The above embodiment only have expressed embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.
Claims (4)
1. a light-emitting device, is characterized in that, comprising: luminescence unit, constant-current drive circuit, controller;
Be electrically connected with constant-current drive circuit after at least two luminescence unit series connection, luminescence unit comprises luminous branch road and bypass branch, luminous branch road and bypass branch are connected in parallel, luminous branch road there is photophore, bypass branch has derailing switch, and derailing switch has signal input part, and controller has signal output part, signal input part docks with signal output part, and controller is used for conducting and the cut-off of control switch device.
2. light-emitting device according to claim 1, is characterized in that, described derailing switch comprises MOSFET pipe and driver module corresponding with it, described MOSFET pipe and the electrical connection of described driver module.
3. light-emitting device according to claim 1, is characterized in that, described photophore is light-emitting diode.
4., according to the arbitrary described light-emitting device of claims 1 to 3, it is characterized in that, the photochromic difference of each described photophore luminescence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420868367.0U CN204425710U (en) | 2014-12-30 | 2014-12-30 | Light-emitting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420868367.0U CN204425710U (en) | 2014-12-30 | 2014-12-30 | Light-emitting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204425710U true CN204425710U (en) | 2015-06-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420868367.0U Expired - Fee Related CN204425710U (en) | 2014-12-30 | 2014-12-30 | Light-emitting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204425710U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104540291A (en) * | 2014-12-30 | 2015-04-22 | 广州市珠江灯光科技有限公司 | Light emitting device and control method |
| CN106803416A (en) * | 2015-10-26 | 2017-06-06 | 三星显示有限公司 | Transmitting driver and display device |
| CN110505730A (en) * | 2018-05-18 | 2019-11-26 | 华润矽威科技（上海）有限公司 | Linear LED drive circuit and the linear LED driving method of full voltage input |
-
2014
- 2014-12-30 CN CN201420868367.0U patent/CN204425710U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104540291A (en) * | 2014-12-30 | 2015-04-22 | 广州市珠江灯光科技有限公司 | Light emitting device and control method |
| CN106803416A (en) * | 2015-10-26 | 2017-06-06 | 三星显示有限公司 | Transmitting driver and display device |
| CN110505730A (en) * | 2018-05-18 | 2019-11-26 | 华润矽威科技（上海）有限公司 | Linear LED drive circuit and the linear LED driving method of full voltage input |
| CN110505730B (en) * | 2018-05-18 | 2022-04-05 | 华润微集成电路(无锡)有限公司 | Linear LED drive circuit and full-voltage input linear LED drive method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150624 Termination date: 20191230 |
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| CF01 | Termination of patent right due to non-payment of annual fee |