CN106900117A - A kind of LED lamplight brightness adjusting method and device - Google Patents
A kind of LED lamplight brightness adjusting method and device Download PDFInfo
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- CN106900117A CN106900117A CN201710197821.2A CN201710197821A CN106900117A CN 106900117 A CN106900117 A CN 106900117A CN 201710197821 A CN201710197821 A CN 201710197821A CN 106900117 A CN106900117 A CN 106900117A
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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
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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]
- H05B45/40—Details of LED load circuits
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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 embodiment of the invention discloses a kind of LED lamplight brightness adjusting method and device, determine PWM duty cycle by counting in sinusoidal signal high level number between copped wave twice is processed, then LED brightness is adjusted according to PWM duty cycle, the phase angle for turn in sinusoidal ac signal by controllable silicon light modulation the regulation of electrical circuit controllable silicon in the prior art is exported changing the power supply that LED brightness is caused and is difficult to maintain the technical problems such as stabilization and LED toggle speed are slow, flash, uneven illumination is even.Present invention method includes：Detect by copped wave process sinusoidal signal and statistic mixed-state to the sinusoidal signal in copped wave twice process between high level number；PWM duty cycle is determined according to the high level number, the relation between high level number and dutycycle；LED brightness is adjusted according to the PWM duty cycle.
Description
Technical field
The present invention relates to LED lamplight high light section field, more particularly to a kind of LED lamplight brightness adjusting method and device.
Background technology
In actual life, user needs to adjust the brightness of lamp, common LED lamplight brightness regulation side according to the demand of oneself
Formula has a lot.
Wherein, existing frequently-used LED lamplight brightness adjustment approach is just by controllable silicon light modulation the regulation of electrical circuit controllable silicon
The phase angle turned in string AC signal changes the voltage and current of light bulb filament.
It is exactly the phase angle of the conducting of LED drive power but above-mentioned LED lamplight brightness adjustment approach has certain defect
Long-term change causes that power supply output is difficult to maintain stabilization, so as to the skill such as cause slow LED toggle speed, flicker, uneven illumination even
Art problem.
The content of the invention
A kind of LED lamplight brightness adjusting method and device are the embodiment of the invention provides, by counting two in sinusoidal signal
High level number determines PWM duty cycle between secondary copped wave treatment, then adjusts LED brightness, existing skill according to PWM duty cycle
Make changing LED brightness at the phase angle turned in sinusoidal ac signal by controllable silicon light modulation the regulation of electrical circuit controllable silicon in art
Into power supply output be difficult to maintain stabilization and the technical problem such as LED toggle speed is slow, flicker, uneven illumination are even.
A kind of LED lamplight brightness adjusting method is the embodiment of the invention provides, including：
Detect by copped wave process sinusoidal signal and statistic mixed-state to the sinusoidal signal in copped wave twice process it
Between high level number；
PWM duty cycle is determined according to the high level number, the relation between high level number and dutycycle；
LED brightness is adjusted according to the PWM duty cycle.
Preferably,
Detect by copped wave process sinusoidal signal and statistic mixed-state to the sinusoidal signal in copped wave twice process it
Between high level number be specially：
High level of the duration more than 10ms determines that copped wave is processed in by detecting the sinusoidal signal processed by copped wave
Position；
High level number of the duration no more than 10ms between copped wave processing position twice in statistics sinusoidal signal.
Preferably,
Detection by copped wave process sinusoidal signal and statistic mixed-state to the sinusoidal signal in copped wave twice process
Between after high level number, determining that PWM is accounted for according to the high level number, the relation between high level number and dutycycle
Before sky ratio, also include：
If high level number is not in preset high level number between copped wave twice is processed in the sinusoidal signal of statistics
In the range of, then judge that statistics is invalid and continue to detect the sinusoidal signal again.
Preferably,
Detection by copped wave process sinusoidal signal and statistic mixed-state to the sinusoidal signal in copped wave twice process
Between before high level number, also include：
Receive switching signal and sinusoidal signal is carried out according to the switching signal, by the chopper circuit at controlling switch
Some wheel identical copped wave treatment.
Preferably,
LED brightness is adjusted according to the PWM duty cycle to be specially：
Controlled according to the PWM duty cycle luminous two in the supply voltage of LED or the source current or LED of LED
The amount of luminescence of pole pipe adjusts LED brightness.
A kind of LED lamplight brightness regulating apparatus are the embodiment of the invention provides, including：
Detection unit, for detect by copped wave process sinusoidal signal and statistic mixed-state to the sinusoidal signal in two
High level number between secondary copped wave treatment；
Coding unit, for determining that PWM is accounted for according to the high level number, the relation between high level number and dutycycle
Sky ratio；
Lamplight brightness adjustment unit, for adjusting LED brightness according to the PWM duty cycle.
Preferably,
Detection unit includes：
Copped wave position determination subelement, for by detect by copped wave process sinusoidal signal in the duration exceed
The high level of 10ms determines the position of copped wave treatment；
Statistics subelement, for counting in sinusoidal signal duration between copped wave processing position twice no more than 10ms
High level number.
Preferably,
The LED lamplight brightness regulating apparatus also include：
Invalidity judgment unit, if not existing for high level number between the treatment of copped wave twice in the sinusoidal signal of statistics
In the range of preset high level number, then judge that statistics is invalid and continue to detect the sinusoidal signal again.
Preferably,
The LED lamplight brightness regulating apparatus also include：
Copped wave unit, for receiving switching signal and according to the switching signal, by the chopper circuit at controlling switch
Some wheel identical copped wave treatment are carried out to sinusoidal signal.
Preferably,
Lamplight brightness adjustment unit specifically for：
Controlled according to the PWM duty cycle luminous two in the supply voltage of LED or the source current or LED of LED
The amount of luminescence of pole pipe adjusts LED brightness.
As can be seen from the above technical solutions, the embodiment of the present invention has advantages below：
A kind of LED lamplight brightness adjusting method and device are the embodiment of the invention provides, by counting two in sinusoidal signal
High level number determines PWM duty cycle between secondary copped wave treatment, then adjusts LED brightness, existing skill according to PWM duty cycle
Make changing LED brightness at the phase angle turned in sinusoidal ac signal by controllable silicon light modulation the regulation of electrical circuit controllable silicon in art
Into power supply output be difficult to maintain stabilization and the technical problem such as LED toggle speed is slow, flicker, uneven illumination are even.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
Other accompanying drawings are obtained with according to these accompanying drawings.
Fig. 1 is a kind of structural representation of the first embodiment of LED lamplight brightness adjusting method provided in an embodiment of the present invention
Figure；
Fig. 2 is a kind of structural representation of the second embodiment of LED lamplight brightness adjusting method provided in an embodiment of the present invention
Figure；
Fig. 3 is a kind of structural representation of the first embodiment of LED lamplight brightness regulating apparatus provided in an embodiment of the present invention
Figure；
Fig. 4 is a kind of structural representation of the second embodiment of LED lamplight brightness regulating apparatus provided in an embodiment of the present invention
Figure；
Fig. 5 is normal civil power sinusoidal signal shape in a kind of LED lamplight brightness adjusting method provided in an embodiment of the present invention；
Fig. 6 be in a kind of LED lamplight brightness adjusting method provided in an embodiment of the present invention normal civil power sinusoidal signal through cutting
Oscillogram after ripple treatment；
Fig. 7 is the rectangular wave detected in a kind of LED lamplight brightness adjusting method provided in an embodiment of the present invention.
Specific embodiment
A kind of LED lamplight brightness adjusting method and device are the embodiment of the invention provides, by counting two in sinusoidal signal
High level number determines PWM duty cycle between secondary copped wave treatment, then adjusts LED brightness, existing skill according to PWM duty cycle
Make changing LED brightness at the phase angle turned in sinusoidal ac signal by controllable silicon light modulation the regulation of electrical circuit controllable silicon in art
Into power supply output be difficult to maintain stabilization and the technical problem such as LED toggle speed is slow, flicker, uneven illumination are even.
To enable that goal of the invention of the invention, feature, advantage are more obvious and understandable, below in conjunction with the present invention
Accompanying drawing in embodiment, is clearly and completely described, it is clear that disclosed below to the technical scheme in the embodiment of the present invention
Embodiment be only a part of embodiment of the invention, and not all embodiment.Based on the embodiment in the present invention, this area
All other embodiment that those of ordinary skill is obtained under the premise of creative work is not made, belongs to protection of the present invention
Scope.
Fig. 1, Fig. 5 to Fig. 7 are referred to, the embodiment of the invention provides a kind of LED lamplight brightness adjusting method first is real
Example is applied, including：
101, detection by copped wave process sinusoidal signal and statistic mixed-state to sinusoidal signal in copped wave twice process it
Between high level number；
In embodiments of the present invention, it is necessary first to the sine that the sinusoidal signal and statistic mixed-state that detection is processed by copped wave are arrived
High level number between the treatment of copped wave twice in signal.
102, PWM duty cycle is determined according to the relation between high level number, high level number and dutycycle；
In embodiments of the present invention, detection by copped wave process sinusoidal signal and statistic mixed-state to sinusoidal signal in
Between the treatment of copped wave twice after high level number, in addition it is also necessary to according between high level number, high level number and dutycycle
Relation determines PWM duty cycle.
103, LED brightness is adjusted according to PWM duty cycle；
In embodiments of the present invention, PWM is being determined according to the relation between high level number, high level number and dutycycle
After dutycycle, in addition it is also necessary to adjust LED brightness according to PWM duty cycle.
Fig. 2, Fig. 5 to Fig. 7 are referred to, the embodiment of the invention provides a kind of LED lamplight brightness adjusting method second is real
Example is applied, including：
201, receive switching signal and sinusoidal signal is carried out according to switching signal, by the chopper circuit at controlling switch
Some wheel identical copped wave treatment；
In embodiments of the present invention, it is necessary first to receive switching signal and according to switching signal, by controlling switch at
Some wheel identical copped wave treatment are carried out to sinusoidal signal for chopper circuit, it is necessary to explanation is, carries out the component of copped wave treatment
Can be controllable silicon, it is necessary to carrying out the reason for copped wave of some wheels is processed is disturbed on power line than larger, it is possible to can receive not
Arrive, so some wheel identical copped wave treatment can be carried out when copped wave, it is ensured that all power supplys can be received during light modulation every time
To signal, the wheel number of wherein copped wave treatment is determined by actual conditions, and often taking turns copped wave treatment includes that copped wave several times is processed, comparison diagram
5 and Fig. 6, it can be seen that have passed through wheel copped wave treatment in sinusoidal signal, wheel copped wave treatment includes the treatment of copped wave twice, removes
Two negative half-waves.
202, by detect by copped wave process sinusoidal signal in high level of the duration more than 10ms determine copped wave
The position for the treatment of；
In embodiments of the present invention, in reception switching signal and according to switching signal, by the copped wave electricity at controlling switch
Road is carried out after copped wave treatment to sinusoidal signal, in addition it is also necessary to which the duration surpasses in by detecting the sinusoidal signal processed by copped wave
The high level for crossing 10ms determines the position of copped wave treatment, it is necessary to explanation, is generally entered during detection sinusoidal signal by single-chip microcomputer
Row is detected and encoded, and such as supply voltage is the single-chip microcomputer of 5V, and general voltage belongs to high level more than 3.7V, so for frequency
It is the sinusoidal signal of 50Hz (cycle is 20ms), the duration of the continuous high level of for detecting necessarily is less than 10ms, example
5ms as shown in Figure 7；And the sinusoidal signal for being processed by copped wave, high level continues at the copped wave treatment for detecting
Time is necessarily more than 10ms, such as 15ms in Fig. 7, below repeats no more.
203, high level number of the duration no more than 10ms between copped wave processing position twice in statistics sinusoidal signal；
In embodiments of the present invention, by detect by copped wave process sinusoidal signal in the duration more than 10ms's
High level is determined after the position of copped wave treatment, in addition it is also necessary to count in sinusoidal signal the duration between copped wave processing position twice
High level number no more than 10ms.
204, if high level number is not in preset high level number between copped wave twice is processed in the sinusoidal signal of statistics
In the range of, then judge that statistics is invalid and continue to detect sinusoidal signal again；
In embodiments of the present invention, the duration is no more than between copped wave processing position twice in sinusoidal signal is counted
After the high level number of 10ms is put, if high level number is not preset between copped wave twice is processed in the sinusoidal signal of statistics
In the range of high level number, then judge that statistics is invalid and continue to detect sinusoidal signal, wherein high level number scope again
Can be needed be configured according to user, such as high level number scope is 22 to 40, when high level number more than 40 or less than
22, then judge that the high level number of statistics is invalid.
205, PWM duty cycle is determined according to the relation between high level number, high level number and dutycycle；
In embodiments of the present invention, if high level number is not pre- between the treatment of copped wave twice in the sinusoidal signal of statistics
In the range of the high level number put, then judge statistics it is invalid and again continue detect sinusoidal signal after, in addition it is also necessary to according to
Relation between high level number, high level number and dutycycle determines PWM duty cycle, if it is 20 for example to set high level number
When, PWM duty cycle is 10%, and when setting high level number as 38, PWM duty cycle is 100%, then when the high level number of statistics
For 22 when, PWM duty cycle then be 20%.
206, controlled according to PWM duty cycle luminous two in the supply voltage of LED or the source current or LED of LED
The amount of luminescence of pole pipe adjusts LED brightness；
In embodiments of the present invention, PWM is being determined according to the relation between high level number, high level number and dutycycle
After dutycycle, in addition it is also necessary to controlled to be sent out in the supply voltage of LED or the source current or LED of LED according to PWM duty cycle
The amount of luminescence of optical diode adjusts LED brightness.
Fig. 3, Fig. 5 to Fig. 7 are referred to, the embodiment of the invention provides a kind of LED lamplight brightness regulating apparatus first is real
Example is applied, including：
Detection unit 301, for detect by copped wave process sinusoidal signal and statistic mixed-state to sinusoidal signal in two
High level number between secondary copped wave treatment.
Coding unit 302, for determining that PWM is accounted for according to the relation between high level number, high level number and dutycycle
Sky ratio.
Lamplight brightness adjustment unit 303, for adjusting LED brightness according to PWM duty cycle.
Fig. 4 to Fig. 7 is referred to, a kind of second embodiment of LED lamplight brightness regulating apparatus is the embodiment of the invention provides,
Including：
Copped wave unit 401, for receiving switching signal and according to switching signal, by the chopper circuit pair at controlling switch
Sinusoidal signal carries out some wheel identical copped wave treatment.
Detection unit 402, for detect by copped wave process sinusoidal signal and statistic mixed-state to sinusoidal signal in two
High level number between secondary copped wave treatment.
Detection unit 402 includes copped wave position determination subelement 4021 and statistics subelement 4022.
Copped wave position determination subelement 4021, for by detect by copped wave process sinusoidal signal in the duration surpass
The high level for crossing 10ms determines the position of copped wave treatment.
Statistics subelement 4022, for counting in sinusoidal signal copped wave processing position twice between the duration be no more than
The high level number of 10ms.
Invalidity judgment unit 403, if not existing for high level number between the treatment of copped wave twice in the sinusoidal signal of statistics
In the range of preset high level number, then judge that statistics is invalid and continue to detect sinusoidal signal again.
Coding unit 404, for determining that PWM is accounted for according to the relation between high level number, high level number and dutycycle
Sky ratio.
Lamplight brightness adjustment unit 405, for controlling the supply voltage of LED or the power supply of LED according to PWM duty cycle
The amount of luminescence of light emitting diode adjusts LED brightness in electric current or LED.
It is apparent to those skilled in the art that, for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, may be referred to the corresponding process in preceding method embodiment, will not be repeated here.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method can be with
Realize by another way.For example, device embodiment described above is only schematical, for example, the unit
Divide, only a kind of division of logic function there can be other dividing mode when actually realizing, for example multiple units or component
Can combine or be desirably integrated into another system, or some features can be ignored, or do not perform.It is another, it is shown or
The coupling each other for discussing or direct-coupling or communication connection can be the indirect couplings of device or unit by some interfaces
Close or communicate to connect, can be electrical, mechanical or other forms.
The unit that is illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit
The part for showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be according to the actual needs selected to realize the mesh of this embodiment scheme
's.
In addition, during each functional unit in each embodiment of the invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to which two or more units are integrated in a unit.Above-mentioned integrated list
Unit can both be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If the integrated unit is to realize in the form of SFU software functional unit and as independent production marketing or use
When, can store in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part for being contributed to prior art in other words or all or part of the technical scheme can be in the form of software products
Embody, the computer software product is stored in a storage medium, including some instructions are used to so that a computer
Equipment (can be personal computer, server, or network equipment etc.) performs the complete of each embodiment methods described of the invention
Portion or part steps.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to preceding
Embodiment is stated to be described in detail the present invention, it will be understood by those within the art that：It still can be to preceding
State the technical scheme described in each embodiment to modify, or equivalent is carried out to which part technical characteristic；And these
Modification is replaced, and does not make the spirit and scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.
Claims (10)
1. a kind of LED lamplight brightness adjusting method, it is characterised in that including：
Detect the sinusoidal signal that is processed by copped wave and statistic mixed-state to the sinusoidal signal in copped wave twice process between it is high
Level number；
PWM duty cycle is determined according to the high level number, the relation between high level number and dutycycle；
LED brightness is adjusted according to the PWM duty cycle.
2. LED lamplight brightness adjusting method according to claim 1, it is characterised in that detection by copped wave treatment just
String signal and statistic mixed-state to the sinusoidal signal between the treatment of copped wave twice high level number be specially：
High level of the duration more than 10ms determines the position that copped wave is processed in by detecting the sinusoidal signal processed by copped wave
Put；
High level number of the duration no more than 10ms between copped wave processing position twice in statistics sinusoidal signal.
3. LED lamplight brightness adjusting method according to claim 1, it is characterised in that processed by copped wave in detection
Sinusoidal signal and statistic mixed-state to the sinusoidal signal between the treatment of copped wave twice after high level number, according to described
Before relation between high level number, high level number and dutycycle determines PWM duty cycle, also include：
If high level number is not in preset high level number scope between copped wave twice is processed in the sinusoidal signal of statistics
It is interior, then judge that statistics is invalid and continue to detect the sinusoidal signal again.
4. LED lamplight brightness adjusting method according to claim 1, it is characterised in that processed by copped wave in detection
Sinusoidal signal and statistic mixed-state to the sinusoidal signal between the treatment of copped wave twice before high level number, also include：
Receive switching signal and sinusoidal signal is carried out according to the switching signal, by the chopper circuit at controlling switch some
The copped wave treatment of wheel identical.
5. LED lamplight brightness adjusting method according to claim 1, it is characterised in that adjusted according to the PWM duty cycle
LED brightness is specially：
Light emitting diode in the supply voltage of LED or the source current or LED of LED is controlled according to the PWM duty cycle
Amount of luminescence adjust LED brightness.
6. a kind of LED lamplight brightness regulating apparatus, it is characterised in that including：
Detection unit, for detect by copped wave process sinusoidal signal and statistic mixed-state to the sinusoidal signal in cut twice
High level number between ripple treatment；
Coding unit, for determining PWM duties according to the high level number, the relation between high level number and dutycycle
Than；
Lamplight brightness adjustment unit, for adjusting LED brightness according to the PWM duty cycle.
7. LED lamplight brightness regulating apparatus according to claim 6, it is characterised in that detection unit includes：
Copped wave position determination subelement, for by detect by copped wave process sinusoidal signal in the duration more than 10ms's
High level determines the position of copped wave treatment；
Statistics subelement, for counting in sinusoidal signal height electricity of the duration no more than 10ms between copped wave processing position twice
Flat number.
8. LED lamplight brightness regulating apparatus according to claim 6, it is characterised in that also include：
Invalidity judgment unit, if for high level number between the treatment of copped wave twice in the sinusoidal signal of statistics not preset
High level number in the range of, then judge that statistics is invalid and continue to detect the sinusoidal signal again.
9. LED lamplight brightness regulating apparatus according to claim 6, it is characterised in that also include：
Copped wave unit, for receiving switching signal and being aligned according to the switching signal, by the chopper circuit at controlling switch
String signal carries out some wheel identical copped wave treatment.
10. LED lamplight brightness regulating apparatus according to claim 6, it is characterised in that lamplight brightness adjustment unit is specific
For：
Light emitting diode in the supply voltage of LED or the source current or LED of LED is controlled according to the PWM duty cycle
Amount of luminescence adjust LED brightness.
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| CN201710197821.2A CN106900117B (en) | 2017-03-29 | 2017-03-29 | A kind of LED lamplight brightness adjusting method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108346399A (en) * | 2018-04-17 | 2018-07-31 | 京东方科技集团股份有限公司 | A kind of display brightness adjusts module and adjusting method, display device |
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| CN201805579U (en) * | 2010-02-11 | 2011-04-20 | 英飞特电子（杭州）有限公司 | Dimming control circuit suitable for leading edge dimmer and/or trailing edge dimmer of LED |
| CN102196634A (en) * | 2010-03-03 | 2011-09-21 | 松下电工株式会社 | Led lighting device |
| CN201967185U (en) * | 2010-10-28 | 2011-09-07 | 英飞特电子（杭州）有限公司 | Light source control device and system |
| CN102458014A (en) * | 2010-10-28 | 2012-05-16 | 英飞特电子（杭州）有限公司 | Light source control method, device and system |
| US20160212813A1 (en) * | 2014-12-23 | 2016-07-21 | Bridgelux, Inc. | Method on digital deep dimming through combined PWM and PFM |
| CN106413209A (en) * | 2016-12-21 | 2017-02-15 | 广东南能汇智节能科技有限公司 | LED light brightness adjusting circuit and method |
| CN106507544A (en) * | 2016-12-21 | 2017-03-15 | 广东南能汇智节能科技有限公司 | A kind of LED lamplight brightness adjusting method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108346399A (en) * | 2018-04-17 | 2018-07-31 | 京东方科技集团股份有限公司 | A kind of display brightness adjusts module and adjusting method, display device |
| CN108346399B (en) * | 2018-04-17 | 2020-04-17 | 京东方科技集团股份有限公司 | Display brightness adjusting module, adjusting method and display device |
| US10971060B2 (en) | 2018-04-17 | 2021-04-06 | Boe Technology Group Co., Ltd. | Method of adjusting display brightness, light-emission control circuit and display device |
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