CN107995733A - Light adjusting circuit, light-dimming method and device - Google Patents
Light adjusting circuit, light-dimming method and device Download PDFInfo
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- CN107995733A CN107995733A CN201711279687.7A CN201711279687A CN107995733A CN 107995733 A CN107995733 A CN 107995733A CN 201711279687 A CN201711279687 A CN 201711279687A CN 107995733 A CN107995733 A CN 107995733A
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- signal
- light
- digital
- control signal
- analog
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
Abstract
The disclosure is directed to light adjusting circuit, light-dimming method and device.The circuit includes：Digital analog converter, drive circuit and light source；Digital analog converter is used to receive digital controlled signal, and digital controlled signal is converted into analog control signal, sends analog control signal to drive circuit, digital controlled signal is the digital signal for adjusting light-source brightness；Analog control signal is the analog signal for adjusting light-source brightness；Drive circuit is used for the electric current that input light source is adjusted according to analog control signal；Light source is used to change light-source brightness according to electric current.The technical solution drive circuit controls the electric current of light source by analog control signal, and since analog control signal is analog signal, the phenomenon that light source stroboscopic would not occur, improves user experience.
Description
Technical field
This disclosure relates to electronic field, more particularly to light adjusting circuit, light-dimming method and device.
Background technology
(light emitting diode, Light Emitting Diode) LED drive circuit realizes that the major programme of light modulation is at present
Using LED drive chip per se with dimming interface realize dimming function, detailed process is：(the pulse of LED drive chip
Width modulated, Pulse Width Modulation) PWM dimming interfaces are connected to the adjustable pwm signal of duty cycle, then pass through chip
The size of current of LED drive circuit for adjusting after internal processing of circuit；Same LED drive chip utilizes the simulation light modulation carried
Interface LINEAR CONTINUOUS is adjustable analog voltage signal, realizes the adjusting for LED drive circuit electric current.
The content of the invention
The embodiment of the present disclosure provides light adjusting circuit, light-dimming method and device.The technical solution is as follows：
According to the first aspect of the embodiment of the present disclosure, there is provided a kind of light adjusting circuit, including：Digital analog converter, drive circuit
And light source；
The digital analog converter is used to receive digital controlled signal, and the digital controlled signal is converted into simulation control letter
Number, the analog control signal is sent to drive circuit, the digital controlled signal is the numeral letter for adjusting light-source brightness
Number；The analog control signal is the analog signal for adjusting the light-source brightness；
The drive circuit is used for the electric current that input light source is adjusted according to the analog control signal；
The light source is used to change the light-source brightness according to the electric current.
The technical scheme provided by this disclosed embodiment can include the following benefits：Drive circuit is controlled by simulating
Signal controls the electric current of light source, since analog control signal is analog signal, realizes that light source without stroboscopic, improves user and uses body
Test.
In one embodiment, the digital analog converter includes：
D/A converting circuit, carries out digital-to-analogue conversion for receiving the digital controlled signal, and by digital controlled signal, obtains
To conversion signal；
Amplifier, for receiving the conversion signal, amplifies the conversion signal, obtains the analog control signal.
In one embodiment, the digital analog converter further includes：
Register, for caching the digital controlled signal.
In one embodiment, the circuit further includes：
Trigger circuit, for receiving or generating trigger signal；
Control circuit, for according to the trigger signal, triggering and generating the digital controlled signal.
In one embodiment, the trigger circuit includes following at least one：
Bluetooth module；WiFi module；Zigbee module；Touch-control module；Physical button.
In one embodiment, the circuit further includes：
Power supply, for providing electric current for the light modulating device.
According to the second aspect of the embodiment of the present disclosure, there is provided a kind of light-dimming method, including：
Receive digital controlled signal；The digital controlled signal is the digital signal for adjusting light-source brightness；
The digital number control signal is converted into analog control signal；The analog control signal is to be used to adjust institute
State the analog signal of light-source brightness；
The brightness of light source is adjusted according to the analog control signal.
According to the third aspect of the embodiment of the present disclosure, there is provided a kind of light modulating device, including：
Receiving module, for receiving digital controlled signal；The digital controlled signal is the number for adjusting light-source brightness
Word signal；
Conversion module, for the digital number control signal to be converted into analog control signal；The simulation control letter
Number it is the analog signal for adjusting the light-source brightness；
Adjustment module, for adjusting the brightness of light source according to the analog control signal.
According to the fourth aspect of the embodiment of the present disclosure, there is provided a kind of light modulating device, including：
Processor；
For storing the memory of processor-executable instruction；
Wherein, the processor is configured as：
Receive digital controlled signal；The digital controlled signal is the digital signal for adjusting light-source brightness；
The digital number control signal is converted into analog control signal；The analog control signal is to be used to adjust institute
State the analog signal of light-source brightness；
The brightness of light source is adjusted according to the analog control signal.
It should be appreciated that the general description and following detailed description of the above are only exemplary and explanatory, not
The disclosure can be limited.
Brief description of the drawings
Attached drawing herein is merged in specification and forms the part of this specification, shows the implementation for meeting the disclosure
Example, and be used to together with specification to explain the principle of the disclosure.
Fig. 1 is the block diagram of the light adjusting circuit according to an exemplary embodiment.
Fig. 2 is the block diagram of the light adjusting circuit according to an exemplary embodiment.
Fig. 3 is the schematic diagram of the difference amplifier according to an exemplary embodiment.
Fig. 4 is the block diagram of the light adjusting circuit according to an exemplary embodiment.
Fig. 5 is the block diagram of the light adjusting circuit according to an exemplary embodiment.
Fig. 6 is the block diagram of the light adjusting circuit according to an exemplary embodiment.
Fig. 7 is the block diagram of the light adjusting circuit according to an exemplary embodiment.
Fig. 8 is the block diagram of the light adjusting circuit according to an exemplary embodiment.
Fig. 9 is the block diagram of the light adjusting circuit according to an exemplary embodiment.
Figure 10 is the flow chart of the light-dimming method according to an exemplary embodiment.
Figure 11 is the block diagram of the light modulating device according to an exemplary embodiment.
Embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During attached drawing, unless otherwise indicated, the same numbers in different attached drawings represent the same or similar key element.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the disclosure.On the contrary, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects be described in detail in claims, the disclosure.
In correlation technique, related light-dimming method is all that light-source brightness is adjusted by pwm signal, due to pwm signal
It is digital signal, therefore light source stroboscopic can be produced in dimming process, it is poor reduces user experience.
Fig. 1 is a kind of block diagram of light adjusting circuit according to an exemplary embodiment.As shown in Figure 1, the light adjusting circuit
Including：Digital analog converter 101, drive circuit 102 and light source 103.
Digital analog converter 101 is used to receive digital controlled signal, and digital controlled signal is converted into analog control signal, to
Drive circuit 102 sends analog control signal, and digital controlled signal is the digital signal for adjusting light-source brightness；Simulation control
Signal is the analog signal for adjusting light-source brightness.
Digital analog converter 101 in the present embodiment can be set in the controller, can also be arranged on outside controller, this reality
Example is applied to be not construed as limiting this.
Digital analog converter 101 can only realize digital-to-analogue conversion；Digital-to-analogue conversion can also be carried out, signal afterwards carries out
Processing, for example, amplification.Analog control signal can be analog level, for example, the analog level of 0-3.3V.
Drive circuit 102 is used for the electric current that input light source 103 is adjusted according to analog control signal.The electric current input light source
103。
Light source 103 is used to change light-source brightness according to electric current.
The light source 103 of this implementation can be most of transistors.
In one embodiment, as shown in Fig. 2, digital analog converter 101 includes：
D/A converting circuit 1011, carries out digital-to-analogue conversion for receiving digital controlled signal, and by digital controlled signal, obtains
To conversion signal.
Amplifier 1012, for receiving conversion signal, amplifies conversion signal, obtains analog control signal.
As shown in figure 3, the amplifier 1012 can be difference amplifier, wherein, conversion signal is as positive input, simulation control
A part for signal processed is as negative input, difference amplifier output analog control signal.
In one embodiment, as shown in figure 4, digital analog converter 101 further includes：
Register 103, for caching the digital controlled signal.
Wherein, register can include two registers of input register and dac register, wherein, input deposit
Equivalent to one retainer of device, can make discrete data keep continuous, dac register can be data cached.First gather
Data do buffer storage and be used as performing data next time in dac register, after next number is according to being sent to,
Data storage above can be released, is transformed to current data, stores current data in dac register again.
Before digital analog converter, sub-circuit can be handled with setting signal, for receiving digital controlled signal, and by number
Word control signal is processed into the signal of preset condition, by the digital analog converter of preset condition.Preset condition can be predeterminated voltage,
Digital controlled signal can be adjusted to predeterminated voltage by signal processing sub-circuit 1013, for example, the voltage of digital controlled signal is
0-3V, the voltage after adjustment are 0-5V.
In one embodiment, as shown in figure 5, circuit further includes：
Trigger circuit 104, for receiving or generating trigger signal.
Control circuit 105, for according to trigger signal, triggering and generating digital controlled signal.
In one embodiment, as shown in fig. 6, trigger circuit 104 includes following at least one：
Bluetooth module 1041；Wireless Fidelity (WIreless-Fidelity, WiFi) module 1042；Purple honeybee Zigbee module
1043；Touch-control module 1044；Physical button 1045.
Here, bluetooth module 1041, WiFi module 1042, Zigbee module 1043 are connected by corresponding connection mode
A control terminal is connected to, receives the signal that control terminal is sent.
Touch-control module 1044 can be touching display screen, and touching display screen receives the touch control operation of user.
Physical button 1045 is that user directly generates trigger signal by pressing, for example, high level.
In one embodiment, as shown in fig. 7, circuit further includes：
Power supply 106, for providing electric current for light modulating device.
In one embodiment, digital controlled signal is pwm signal.
In one embodiment, light source 103 includes following any：
LED, Organic Light Emitting Diode (Organic Light Emitting Diode, OLED), quantum light emitting diode
(Quantum Dot Light Emitting Diodes, QLED).
In the present embodiment, digital analog converter 101, bluetooth module 1041, WiFi module 1042, Zigbee module 1043, place
Reason device may be located in controller, as shown in Figure 8.
Fig. 9 is a kind of flow chart of light-dimming method according to an exemplary embodiment, as shown in figure 9, light-dimming method
For in light modulating device, which to be applied to light adjusting circuit, this method may comprise steps of 201-203：
In step 201, digital controlled signal is received.
Digital controlled signal is the digital signal for adjusting light-source brightness.
In step 202, digital number control signal is converted into analog control signal.
Analog control signal is the analog signal for adjusting light-source brightness.
In step 203, the brightness of light source is adjusted according to analog control signal.
In the present embodiment, drive circuit controls the electric current of light source by analog control signal, since analog control signal is
Analog signal, realizes that light source without stroboscopic, improves user experience.
Figure 10 is a kind of block diagram of light modulating device according to an exemplary embodiment, the device can by software,
Hardware or both is implemented in combination with as some or all of of electronic equipment.As shown in Figure 10, which includes：
Receiving module 301, for receiving digital controlled signal；The digital controlled signal is for adjusting light-source brightness
Digital signal；
Conversion module 302, for the digital number control signal to be converted into analog control signal；The simulation control
Signal is the analog signal for adjusting the light-source brightness；
Adjustment module 303, for adjusting the brightness of light source according to the analog control signal.
According to the third aspect of the embodiment of the present disclosure, there is provided a kind of light modulating device, including：
Processor；
For storing the memory of processor-executable instruction；
Wherein, processor is configured as：
Receive digital controlled signal；The digital controlled signal is the digital signal for adjusting light-source brightness；
The digital number control signal is converted into analog control signal；The analog control signal is to be used to adjust institute
State the analog signal of light-source brightness；
The brightness of light source is adjusted according to the analog control signal.
On the device in above-described embodiment, wherein modules perform the concrete mode of operation in related this method
Embodiment in be described in detail, explanation will be not set forth in detail herein.
Figure 11 is a kind of block diagram for light modulating device according to an exemplary embodiment.For example, device 1900 can
To be provided as a server.Device 1900 includes processing component 1922, it further comprises one or more processors, and
As the memory resource representated by memory 1932, for store can by the instruction of the execution of processing component 1922, such as using
Program.The application program stored in memory 1932 can include it is one or more each correspond to one group of instruction
Module.In addition, processing component 1922 is configured as execute instruction, to perform the above method.
Device 1900 can also include a power supply module 1926 and be configured as the power management of executive device 1900, one
Wired or wireless network interface 1950 is configured as device 1900 being connected to network, and input and output (I/O) interface
1958.Device 1900 can be operated based on the operating system for being stored in memory 1932, such as Windows ServerTM, Mac
OS XTM, UnixTM, LinuxTM, FreeBSDTM or similar.
A kind of non-transitorycomputer readable storage medium, when the instruction in the storage medium is by the processing of device 1900
When device performs so that device 1900 is able to carry out above-mentioned light-dimming method, the described method includes：
Receive digital controlled signal；The digital controlled signal is the digital signal for adjusting light-source brightness；
The digital number control signal is converted into analog control signal；The analog control signal is to be used to adjust institute
State the analog signal of light-source brightness；
The brightness of light source is adjusted according to the analog control signal.
Those skilled in the art will readily occur to the disclosure its after considering specification and putting into practice disclosure disclosed herein
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or
Person's adaptive change follows the general principle of the disclosure and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.Description and embodiments are considered only as exemplary, and the true scope and spirit of the disclosure are by following
Claim is pointed out.
It should be appreciated that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present disclosure is only limited by appended claim.
Claims (10)
- A kind of 1. light adjusting circuit, it is characterised in that including：Digital analog converter, drive circuit and light source；The digital analog converter is used to receive digital controlled signal, and the digital controlled signal is converted into analog control signal, The analog control signal is sent to drive circuit, the digital controlled signal is the digital signal for adjusting light-source brightness； The analog control signal is the analog signal for adjusting the light-source brightness；The drive circuit is used for the electric current that input light source is adjusted according to the analog control signal；The light source is used to change the light-source brightness according to the electric current.
- 2. circuit according to claim 1, it is characterised in that the digital analog converter includes：D/A converting circuit, carries out digital-to-analogue conversion for receiving the digital controlled signal, and by digital controlled signal, is turned Change signal；Amplifier, for receiving the conversion signal, amplifies the conversion signal, obtains the analog control signal.
- 3. circuit according to claim 2, it is characterised in that the digital analog converter further includes：Register, for caching the digital controlled signal.
- 4. circuit according to claim 1, it is characterised in that the circuit further includes：Trigger circuit, for receiving or generating trigger signal；Control circuit, for according to the trigger signal, triggering and generating the digital controlled signal.
- 5. circuit according to claim 1, it is characterised in that the trigger circuit includes following at least one：Bluetooth module；Wireless Fidelity WiFi module；Purple honeybee Zigbee module；Touch-control module；Physical button.
- 6. circuit according to claim 1, it is characterised in that the circuit further includes：Power supply, for providing electric current for the light modulating device.
- A kind of 7. light-dimming method, it is characterised in that including：Receive digital controlled signal；The digital controlled signal is the digital signal for adjusting light-source brightness；The digital number control signal is converted into analog control signal；The analog control signal is to be used to adjust the light The analog signal of source brightness；The brightness of light source is adjusted according to the analog control signal.
- A kind of 8. light modulating device, it is characterised in that including：Receiving module, for receiving digital controlled signal；The digital controlled signal is the numeral letter for adjusting light-source brightness Number；Conversion module, for the digital number control signal to be converted into analog control signal；The analog control signal is For adjusting the analog signal of the light-source brightness；Adjustment module, for adjusting the brightness of light source according to the analog control signal.
- A kind of 9. light modulating device, it is characterised in that including：Processor；For storing the memory of processor-executable instruction；Wherein, the processor is configured as：Receive digital controlled signal；The digital controlled signal is the digital signal for adjusting light-source brightness；The digital number control signal is converted into analog control signal；The analog control signal is to be used to adjust the light The analog signal of source brightness；The brightness of light source is adjusted according to the analog control signal.
- 10. a kind of computer-readable recording medium, is stored thereon with computer program, it is characterised in that the program is by processor The step of claim 7 the method is realized during execution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711279687.7A CN107995733A (en) | 2017-12-06 | 2017-12-06 | Light adjusting circuit, light-dimming method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711279687.7A CN107995733A (en) | 2017-12-06 | 2017-12-06 | Light adjusting circuit, light-dimming method and device |
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| CN107995733A true CN107995733A (en) | 2018-05-04 |
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| CN201711279687.7A Pending CN107995733A (en) | 2017-12-06 | 2017-12-06 | Light adjusting circuit, light-dimming method and device |
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Cited By (4)
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| CN111552143A (en) * | 2020-05-09 | 2020-08-18 | 深圳市火乐科技发展有限公司 | Projector and dimming system thereof |
| CN112188674A (en) * | 2020-10-19 | 2021-01-05 | 美芯晟科技（北京）有限公司 | PWM dimming control method and circuit without stroboflash |
| CN113811039A (en) * | 2021-11-19 | 2021-12-17 | 深圳赫飞物联科技有限公司 | Light modulation circuit |
| CN114126131A (en) * | 2021-08-18 | 2022-03-01 | 上海中基国威电子股份有限公司 | Dimming method using MCU coding |
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| CN114126131B (en) * | 2021-08-18 | 2023-09-08 | 上海中基国威电子股份有限公司 | Dimming method using MCU coding |
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Application publication date: 20180504 |