CN209897312U - Regulating circuit for stabilizing luminous power of light-emitting diode - Google Patents
Regulating circuit for stabilizing luminous power of light-emitting diode Download PDFInfo
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- CN209897312U CN209897312U CN201822058391.9U CN201822058391U CN209897312U CN 209897312 U CN209897312 U CN 209897312U CN 201822058391 U CN201822058391 U CN 201822058391U CN 209897312 U CN209897312 U CN 209897312U
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- emitting diode
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The utility model discloses a regulating circuit for stabilizing the luminous power of a light-emitting diode, one end of the light-emitting diode of the regulating circuit is connected with a supply voltage, a sensing module for sensing the state parameters of the light emitting diode during the light emitting process is arranged in the regulating circuit, and one side of the sensing module is electrically connected with a processing module which sends out a modulation signal according to the sensed state parameter, one side of the processing module is electrically connected with a pulse width modulation generator which receives the modulation signal to adjust the duty ratio so as to keep the output power of the light emitting diode within a preset range, and one side of the pulse width modulation generator is electrically connected with at least one switch for controlling the pulse width modulation generator to be turned on or off, the processing module can adjust the duty ratio of the pulse width modulation generator according to the state parameters sensed by the sensing module, so that the effect that the emitting power of the light emitting diode is stably positioned in a preset range can be achieved.
Description
Technical Field
The utility model relates to a regulation and control circuit for stabilizing emitting diode luminous power indicates that the processing module of regulation and control circuit can adjust the duty cycle of pulse width modulation generator according to the state parameter that sensing module sensed especially, makes emitting diode's the power of sending stably be arranged in predetermineeing the scope by this to promote the security in the use and emitting diode's life.
Background
The led is widely used in general lighting, teaching indicators, gradienters, sights or laser diode cutters, and the led may have unstable light emitting power due to external environmental temperature variation, temperature variation of the light emitting module body, electronic component difference, electrical characteristics or human factors.
However, the output power of the led will be high due to the variation of various variables, and the excessively high output power will not only increase the danger of use, but also reduce the service life of the led, and if the output power of the led is insufficient due to the variation of various variables, which affects the normal use of the led, the led is prone to have unstable output power due to factors such as the use mode or environment, so that the product yield is not good, and the led is prone to fail to meet various use or safety specifications, which causes inconvenience in use.
Therefore, how to try to solve the above-mentioned drawbacks and inconveniences of the prior art is a direction in which related arts are keenly required to research and improve.
SUMMERY OF THE UTILITY MODEL
In view of the above problems and disadvantages, the present inventors have collected relevant data and designed such a control circuit for stabilizing the light emitting power of the led through multi-evaluation and consideration.
The main objective of the present invention is to provide a light emitting diode in the preset range of the output power of the light emitting diode in the regulation circuit, and one end of the light emitting diode is connected with the supply voltage, and the sensing module for sensing the status parameter of the light emitting diode when emitting light is disposed in the regulation circuit, and one side of the sensing module is electrically connected with the processing module for emitting the modulation signal according to the sensed status parameter, and one side of the processing module is electrically connected with the pulse width modulation generator for receiving the modulation signal to adjust the duty ratio to maintain the output power of the light emitting diode in the preset range, and one side of the pulse width modulation generator is electrically connected with at least one switch for controlling the pulse width modulation generator to be turned on or turned off, and one end of the switch is electrically connected with the light emitting diode, and the other end of the switch is electrically connected with the grounding voltage, and the processing module can adjust the switch of the pulse width modulation generator according to The duty ratio ensures that the emitting power of the light emitting diode is stably positioned in a preset range, so as to achieve the purposes of improving the use safety and prolonging the service life of the light emitting diode.
In order to achieve the above object, the present invention provides a control circuit for stabilizing the light emitting power of a light emitting diode, wherein the control circuit comprises a light emitting diode with light emitting output power within a predetermined range, a voltage supply is connected to one end of the light emitting diode, a sensing module for sensing the state parameter of the light emitting diode during light emitting is provided in the control circuit, a processing module for sending a modulation signal according to the sensed state parameter is electrically connected to one side of the sensing module, a pulse width modulation generator for receiving the modulation signal to adjust the duty ratio and maintaining the output power of the light emitting diode within the predetermined range is electrically connected to one side of the processing module, at least one switch for controlling the on/off of the pulse width modulation generator is electrically connected to one end of the switch, the other end of the switch is electrically connected with a grounding voltage.
In an embodiment of the present invention, the sensing module in the regulation circuit includes a voltage conversion element for converting light energy emitted by the light emitting diode into electric energy and a signal converter for converting the electric energy into a digital signal, one end of the voltage conversion element is electrically connected between the light emitting diode and a supply voltage, and two ends of the signal converter are electrically connected to the voltage conversion element and the processing module, respectively.
In an embodiment of the present invention, the sensing module is provided with a temperature sensing element electrically connected to the processing module and used for sensing the operating temperature of the regulating circuit.
Drawings
Fig. 1 is a circuit diagram of the present invention.
Fig. 2 is a circuit diagram of another embodiment of the present invention.
Description of reference numerals: 1-a regulation circuit; 11-a light emitting diode; 12-a sensing module; 121-a voltage converting element; 122-a signal converter; 123-a temperature sensing element; 13-a processing module; 14-a pulse width modulation generator; 15-a switch; VCC-supply voltage; GND-ground voltage.
Detailed Description
As shown in fig. 1, the circuit diagram of the present invention can be clearly seen from the figure, the regulation circuit 1 of the present invention includes a light emitting Diode 11 (e.g. a Laser Diode (LD)) which emits light with an output power within a predetermined range, a supply Voltage (VCC) is connected to one end of the light emitting Diode 11, a sensing module 12 for sensing a state parameter when the light emitting Diode 11 emits light is disposed in the regulation circuit 1, a processing module 13 which emits a Modulation signal according to the sensed state parameter (e.g. a voltage value or a temperature value) is electrically connected to one side of the sensing module 12, a Pulse-Width Modulation generator 14 (PWM) which receives the Modulation signal to adjust a Duty Cycle so as to maintain the output power of the light emitting Diode 11 within the predetermined range is electrically connected to one side of the processing module 13, one side of the pwm generator 14 is electrically connected to at least one switch 15 for controlling the pwm generator 14 to turn on or off, and one end of the switch 15 is electrically connected to the led 11, and the other end of the switch 15 is electrically connected to a ground voltage (GND).
The sensing module 12 of the control circuit 1 includes a voltage conversion element 121 (e.g., a Photodiode) and a signal converter 122 (ADC), wherein one end of the voltage conversion element 121 is electrically connected between the light emitting diode 11 and a supply Voltage (VCC), and two ends of the signal converter 122 are electrically connected to the voltage conversion element 121 and the processing module 13, respectively.
Furthermore, the duty ratio in the pwm generator 14 of the aforementioned regulation circuit 1 refers to the pulse on time of the pwm generator 14 divided by the total time (on time plus off time) × 100%.
However, the switch 15 of the control circuit 1 may be a Bipolar Junction Transistor (BJT), a Field Effect Transistor (FET), an N-channel Metal-Oxide-Semiconductor Field-Effect Transistor (N-channel Metal-Oxide-Semiconductor Field-Effect Transistor), a P-channel Metal-Oxide-Semiconductor Field-Effect Transistor (P-channel Metal-Oxide-Semiconductor Field-Effect Transistor), or a Junction Field Effect Transistor (JFET).
When the present invention is used in practice, the regulating circuit 1 is applicable to a circuit of a laser diode product such as a laser pointer, a general teaching indicator, a level gauge, a sighting device or a laser diode cutter, etc., one end of the light emitting diode 11 of the regulating circuit 1 receives a supply Voltage (VCC) to make a current flow through the light emitting diode 11 and transmit the current to the switch 15, and then the current is transmitted toward a ground voltage (GND) direction to turn on the whole loop of the regulating circuit 1, at this time, the light emitting diode 11 emits a light beam with an output power within a predetermined range, and the sensing module 12 converts the light energy emitted from the light emitting diode 11 into electric energy by the voltage converting element 121, and converts the electric energy into a digital signal by the signal converter 122, and transmits the digital signal to the processing module 13 by the signal converter 122, after receiving the digital signal, the processing module 13 records a voltage state parameter of the output power of the light emitting diode 11 within a preset range, so that the voltage state parameter can be used as a reference value for subsequent determination.
If the output power of the led 11 of the control circuit 1 is increased or decreased beyond the preset range, the voltage conversion element 121 of the sensing module 12 will convert the excessively high or low light energy into electric energy, and the signal converter 122 will convert the electric energy into a digital signal and transmit the digital signal to the processing module 13, so that the processing module 13 will compare the voltage status parameter with the recorded reference value, and further know that the output power of the led 11 is actually beyond the preset range, at this time, the processing module 13 will send a modulation signal to the pwm generator 14, and after receiving the modulation signal, the pwm generator 14 will adjust the duty cycle to increase or decrease the duty cycle, and further decrease or increase the output power of the led 11 back to the preset range, so that the led 11 can stably send out a laser beam whose power conforms to the preset range, so as to achieve the effects of improving the safety in use and prolonging the service life of the light emitting diode 11.
Referring to fig. 2, it can be clearly seen that, in the circuit diagram of another embodiment of the present invention, the sensing module 12 of another embodiment of the present invention can omit the signal converter 122, and the temperature sensing element 123 electrically connected to the processing module 13 and capable of sensing the operating temperature of the regulating circuit 1 is added, when the light emitting diode 11 emits light with output power within the preset range, the temperature sensing element 123 can sense the operating temperature of the regulating circuit 1 at the time, and the processing module 13 records the sensed temperature state parameter, and if the output power of the light emitting diode 11 is too high or too low, so that the operating temperature of the regulating circuit 1 deviates from the temperature state parameter originally recorded by the processing module 13, the processing module 13 will emit a modulation signal to the pulse width modulation generator 14, and further adjust the duty ratio by the pulse width modulation generator 14, so as to raise or lower the duty ratio, thereby lowering or raising the output power of the light emitting diode 11 back to the preset range, so that the light emitting diode 11 can stably emit the laser beam with the power conforming to the preset range, and the purpose of using the temperature sensing manner to stably emit the laser beam with the power conforming to the preset range by the light emitting diode 11 can be achieved.
The sensing module 12 of the above-mentioned another embodiment can sense the temperature only by using the temperature sensing element 123, so that the processing module 13 can adjust the duty cycle of the pwm generator 14 according to the temperature state parameter sensed by the temperature sensing element 123, and therefore, the voltage conversion element 121 of the sensing module 12 can be omitted in practical use.
The above detailed description is directed to a preferred embodiment of the present invention, but the present invention is not limited thereto, and other equivalent variations and modifications which do not depart from the spirit of the invention should be construed as being included therein.
Claims (3)
1. A regulation and control circuit for stabilizing the luminous power of a light-emitting diode is characterized in that the regulation and control circuit comprises the light-emitting diode which emits light with the output power within a preset range, one end of the light emitting diode is connected with a supply voltage, a sensing module for sensing state parameters when the light emitting diode emits light is arranged in the regulating and controlling circuit, and one side of the sensing module is electrically connected with a processing module which sends out a modulation signal according to the sensed state parameter, one side of the processing module is electrically connected with a pulse width modulation generator which receives the modulation signal to adjust the duty ratio so as to keep the output power of the light emitting diode within a preset range, and one side of the pulse width modulation generator is electrically connected with at least one switch for controlling the pulse width modulation generator to be turned on or off, one end of the switch is electrically connected with the light emitting diode, and the other end of the switch is electrically connected with the grounding voltage.
2. The circuit of claim 1, wherein the sensing module of the control circuit comprises a voltage converter for converting light energy emitted by the light emitting diode into electrical energy and a signal converter for converting the electrical energy into a digital signal, wherein one end of the voltage converter is electrically connected between the light emitting diode and a supply voltage, and two ends of the signal converter are electrically connected to the voltage converter and the processing module, respectively.
3. The circuit of claim 1, wherein the sensing module comprises a temperature sensing device electrically connected to the processing module for sensing an operating temperature of the regulating circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822058391.9U CN209897312U (en) | 2018-12-07 | 2018-12-07 | Regulating circuit for stabilizing luminous power of light-emitting diode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822058391.9U CN209897312U (en) | 2018-12-07 | 2018-12-07 | Regulating circuit for stabilizing luminous power of light-emitting diode |
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| Publication Number | Publication Date |
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| CN209897312U true CN209897312U (en) | 2020-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822058391.9U Active CN209897312U (en) | 2018-12-07 | 2018-12-07 | Regulating circuit for stabilizing luminous power of light-emitting diode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112731989A (en) * | 2020-12-24 | 2021-04-30 | 美国西北仪器公司 | Control device and method for laser device and laser measuring device |
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2018
- 2018-12-07 CN CN201822058391.9U patent/CN209897312U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112731989A (en) * | 2020-12-24 | 2021-04-30 | 美国西北仪器公司 | Control device and method for laser device and laser measuring device |
| WO2022134531A1 (en) * | 2020-12-24 | 2022-06-30 | 美国西北仪器公司 | Control apparatus and method for laser apparatus, and laser measuring apparatus |
| US11955771B2 (en) * | 2020-12-24 | 2024-04-09 | Northwest Instrument Inc. | Control device and method for laser device and laser measurement device |
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