CN102944303A - PWM (pulse width modulation) light source interference resistant illumination detection method and device and light source adjusting method - Google Patents
PWM (pulse width modulation) light source interference resistant illumination detection method and device and light source adjusting method Download PDFInfo
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- CN102944303A CN102944303A CN2012104599925A CN201210459992A CN102944303A CN 102944303 A CN102944303 A CN 102944303A CN 2012104599925 A CN2012104599925 A CN 2012104599925A CN 201210459992 A CN201210459992 A CN 201210459992A CN 102944303 A CN102944303 A CN 102944303A
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- 238000005286 illumination Methods 0.000 title claims abstract description 121
- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000005070 sampling Methods 0.000 claims abstract description 48
- 230000000630 rising effect Effects 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 206010011878 Deafness Diseases 0.000 description 2
- 210000005069 ears Anatomy 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
- G01J1/20—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle
- G01J1/28—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using variation of intensity or distance of source
- G01J1/30—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using variation of intensity or distance of source using electric radiation detectors
- G01J1/32—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using variation of intensity or distance of source using electric radiation detectors adapted for automatic variation of the measured or reference value
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J2001/4247—Photometry, e.g. photographic exposure meter using electric radiation detectors for testing lamps or other light sources
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Abstract
The invention provides a PWM (pulse width modulation) light source interference resistant illumination detection method and a device and a light source adjusting method. The PWM light source interference resistant illumination detection device comprises a receiving module and a detecting module, wherein the receiving module is used for receiving a PWM signal of a PWM light source; and the detecting module is used for sampling the illumination in the environment when the PWM signal is in low level, and obtaining the illumination strength in the environment according to the sampled illumination, wherein the period of the PWM signal is t, the sampling period T is equal to nt, and n is a positive integer. According to the illumination detection method, device and the light source adjusting method provided by the invention, the illumination in the environment is sampled when the PWM signal is in a low level, namely, the illumination in the environment is sampled when the PWM light source is off, and the illumination strength in the environment is obtained according to the sampled illumination, thus, the influence to the illumination strength of the environment when the PWM light source is on is avoided, thereby accurately detecting the illumination strength in the environment.
Description
Technical field
The present invention relates to the detection of ambient light illumination, relate in particular to luminance detection method, device and light source adjustment method that a kind of anti-PWM light source disturbs.
Background technology
Be equipped with LED light in present most of household electrical appliances or the consumer, suitable branch's LED light is subjected to the control of pulse-width modulation PWM signal, thereby making LED light one dodge one goes out, but the frequent LED light of going out of dodging tends to the people is caused certain interference, if can allow the brightness of LED light change according to the intensity of illumination of environment, thereby make the brightness of LED light in its place environment, fall on deaf ears and to address the above problem.This just needs us can accurately detect intensity of illumination in the environment of LED light place, but when LED light is bright, will the intensity of illumination of environment be affected, therefore design a kind of luminance detection method that not affected by above-mentioned LED light light and be necessary very much.
Summary of the invention
The technical matters that the present invention mainly solves provides luminance detection method, device and the light source adjustment method that a kind of anti-PWM light source disturbs, and can accurately detect the intensity of illumination in the environment.
For addressing the above problem, a kind of technical scheme that the present invention adopts is: the luminance detection method that provides a kind of anti-PWM light source to disturb comprises:
Receive the pulse-width modulation PWM signal of PWM light source;
When described pwm signal low level, the illumination in the environment is sampled, and obtain intensity of illumination in the environment according to the illumination of sampling; Wherein, the cycle of described pwm signal is t, and the sampling period is T=nt, and n is positive integer.
Wherein, when described pwm signal low level, the illumination in the environment sampled and be specially: when described pwm signal low level, when decaying to of described pwm signal is minimum, the illumination in the environment is sampled.
Wherein, the cycle of described pwm signal and sampling period are 10ms.
Wherein, decaying to when minimum of described pwm signal is: during 9ms behind described pwm signal rising edge.
For addressing the above problem, the another kind of technical scheme that the present invention adopts is: the illumination testing apparatus that provides a kind of anti-PWM light source to disturb comprises:
Receiver module is for the pulse-width modulation PWM signal that receives the PWM light source;
Detection module is used for when described pwm signal low level the illumination of environment being sampled, and obtains intensity of illumination in the environment according to the illumination of sampling; Wherein, the cycle of described pwm signal is t, and the sampling period is T=nt, and n is positive integer.
Wherein, described detection module comprises: the sampling submodule is used for when decaying to of described pwm signal is minimum illumination in the environment being sampled when described pwm signal low level.
Wherein, the cycle of described pwm signal and sampling period are 10ms.
Wherein, decaying to when minimum of described pwm signal is: during 9ms behind described pwm signal rising edge.
For addressing the above problem, the another kind of technical scheme that the present invention adopts is: the PWM light illumination method of adjustment that provides a kind of anti-PWM light source to disturb comprises:
Receive the pulse-width modulation PWM signal of PWM light source;
When described pwm signal low level, the illumination in the environment is sampled, and obtain intensity of illumination in the environment according to the illumination of sampling;
Adjust the brightness of described PWM light source based on described intensity of illumination;
Wherein, the cycle of described pwm signal is t, and the sampling period is T=nt, and n is positive integer.
Wherein, when described pwm signal low level, the illumination in the environment sampled and be specially: when described pwm signal low level, when decaying to of described pwm signal is minimum, the illumination in the environment is sampled.
Wherein, the cycle of described pwm signal and sampling period are 10ms.
Wherein, decaying to when minimum of described pwm signal is: during 9ms behind described pwm signal rising edge.
The invention has the beneficial effects as follows: the invention provides the luminance detection method that a kind of anti-PWM light source disturbs, by the illumination in the environment being sampled when the described pwm signal low level, namely when the PWM light source goes out, the illumination in the environment is sampled, and obtain intensity of illumination in the environment according to the illumination of sampling, the impact that when having avoided the PWM light source bright the intensity of illumination of environment has been caused, thus can accurately detect intensity of illumination in the environment.
Description of drawings
Fig. 1 is the luminance detection method flow diagram that anti-PWM light source disturbs in an embodiment of the present invention;
Fig. 2 is anti-PWM light source disturbs in an embodiment of the present invention the luminance detection method synoptic diagram the when intensity of illumination in the environment is sampled;
Fig. 3 is the module map of the illumination testing apparatus that anti-PWM light source disturbs in an embodiment of the present invention;
Fig. 4 is the module map of the illumination testing apparatus that anti-PWM light source disturbs in another embodiment of the present invention;
Synoptic diagram when the illumination testing apparatus that anti-PWM light source disturbs in Fig. 5 an embodiment of the present invention is sampled to the intensity of illumination in the environment;
Fig. 6 is the PWM light illumination method of adjustment process flow diagram that anti-PWM light source disturbs in an embodiment of the present invention;
Fig. 7 is the module map of the PWM light illumination adjusting gear that anti-PWM light source disturbs in an embodiment of the present invention;
Fig. 8 is the module map of the PWM light illumination adjusting gear that anti-PWM light source disturbs in another embodiment of the present invention.
Embodiment
By describing technology contents of the present invention, structural attitude in detail, realized purpose and effect, below in conjunction with embodiment and cooperate that accompanying drawing is detailed to give explanation.
See also Fig. 1 and Fig. 2, the luminance detection method that present embodiment provides a kind of anti-PWM light source to disturb comprises:
The pulse-width modulation PWM signal of S1, reception PWM light source;
S2, when described pwm signal low level, the illumination in the environment is sampled, and obtain intensity of illumination in the environment according to the illumination of sampling; Wherein, the cycle of described pwm signal is t, and the sampling period is T=nt, and n is positive integer.
The present invention is by sampling to the illumination in the environment when the described pwm signal low level, namely when the PWM light source goes out, the illumination in the environment is sampled, and obtain intensity of illumination in the environment according to the illumination of sampling, the impact that when having avoided the PWM light source bright the intensity of illumination of environment has been caused, thus can accurately detect intensity of illumination in the environment.
In the present embodiment, the step of when described pwm signal low level the illumination in the environment being sampled among the S2 is specially: when described pwm signal low level, when decaying to of described pwm signal is minimum illumination in the environment is sampled.In specific embodiment, see also Fig. 2, square wave shown in the figure is the PWM square wave based on pwm signal, herein, the PWM light source is the LED lamp, wherein led on is that the high level of pwm signal (square wave) represents that namely the LED lamp is bright, and led off is that the low level of pwm signal (square wave) represents that namely the LED lamp goes out.Such as shown in Figure 2, cycle and the sampling period of described pwm signal are 10ms.Decaying to when minimum of described pwm signal is: during 9ms behind described pwm signal rising edge, i.e. expression pwm signal this moment is minimum on the impact of intensity of illumination sample devices, and the result who draws also can be the most accurate.In the present invention, intensity of illumination sample devices (equipment of namely intensity of illumination of environment being sampled) can be illuminance transducer, also can be optical sensor, or light activated element etc.
And in the present invention, the method that S2 obtains intensity of illumination in the environment is the known content in this area, does not repeat them here.
See also Fig. 3 and Fig. 4, the illumination testing apparatus that present embodiment also provides a kind of anti-PWM light source to disturb comprises:
In the present embodiment, described detection module 2 comprises: sampling submodule 21 and data submodule 22.Sampling submodule 21 is used for when decaying to of described pwm signal is minimum illumination in the environment being sampled when described pwm signal low level.Data submodule 22 is used for obtaining according to the illumination of sampling submodule 21 samplings the intensity of illumination of environment, and the method that data submodule 22 obtains intensity of illumination in the environment is the known content in this area, does not repeat them here.
See also Fig. 5, square wave shown in the figure is the PWM square wave based on pwm signal, and herein, the PWM light source is the LED lamp, wherein led on is that the high level of pwm signal (square wave) represents that namely the LED lamp is bright, and led off is that the low level of pwm signal (square wave) represents that namely the LED lamp goes out.Such as shown in Figure 5, cycle and the sampling period of described pwm signal are 10ms.Decaying to when minimum of described pwm signal is: during 9ms behind described pwm signal rising edge, i.e. expression pwm signal this moment is minimum on the impact of intensity of illumination sample devices, and the result who draws also can be the most accurate.In the present invention, detection module (being previously described intensity of illumination equipment) can be illuminance transducer, also can be optical sensor, or light activated element etc.
See also Fig. 6, the PWM light illumination method of adjustment that present embodiment provides a kind of anti-PWM light source to disturb comprises:
The pulse-width modulation PWM signal of S10, reception PWM light source;
S20, when described pwm signal low level, the illumination in the environment is sampled, and obtain intensity of illumination in the environment according to the illumination of sampling;
S30, adjust the brightness of described PWM light source based on described intensity of illumination; Wherein, the cycle of described pwm signal is t, and the sampling period is T=nt, and n is positive integer.
The present invention is by sampling to the illumination in the environment when the described pwm signal low level, namely when the PWM light source goes out, the illumination in the environment is sampled, and obtain intensity of illumination in the environment according to the illumination of sampling, the impact that when having avoided the PWM light source bright the intensity of illumination of environment has been caused, thus can accurately detect intensity of illumination in the environment.The present invention adjusts the brightness of PWM light source by detected intensity of illumination again, thereby the brightness of LED light can be fallen on deaf ears in its place environment, also tend to the people is caused the problem of certain interference with regard to having solved LED light that the frequent sudden strain of a muscle mentioned in the background technology goes out.
In the present embodiment, S20 samples to the illumination in the environment when described pwm signal low level and is specially: when described pwm signal low level, when decaying to of described pwm signal is minimum illumination in the environment is sampled.Concrete, cycle and the sampling period of described pwm signal are 10ms.Decaying to when minimum of described pwm signal is: during 9ms behind described pwm signal rising edge, i.e. expression pwm signal this moment is minimum on the impact of intensity of illumination sample devices, and the result who draws also can be the most accurate.Concrete sampling process does not repeat them here as mentioned before.In the present invention, intensity of illumination sample devices (equipment of namely intensity of illumination of environment being sampled) can be illuminance transducer, also can be optical sensor, or light activated element etc.
See also Fig. 7 and Fig. 8, the PWM light illumination adjusting gear that present embodiment also provides a kind of anti-PWM light source to disturb comprises:
Adjusting module 30 is used for adjusting based on described intensity of illumination the brightness of described PWM light source; Wherein, the cycle of described pwm signal is t, and the sampling period is T=nt, and n is positive integer.
In the present embodiment, described detection module 20 comprises: sampling submodule 201 and data submodule 202.Sampling submodule 201 is used for when decaying to of described pwm signal is minimum illumination in the environment being sampled when described pwm signal low level.Data submodule 202 is used for obtaining according to the illumination of sampling submodule 201 samplings the intensity of illumination of environment, and the method that data submodule 202 obtains intensity of illumination in the environment is the known content in this area, does not repeat them here.
In specific embodiment, cycle and the sampling period of described pwm signal are 10ms.Decaying to when minimum of described pwm signal is: during 9ms behind described pwm signal rising edge, i.e. expression pwm signal this moment is minimum on the impact of intensity of illumination sample devices, and the result who draws also can be the most accurate.In the present invention, detection module (being previously described intensity of illumination equipment) can be illuminance transducer, also can be optical sensor, or light activated element etc.Concrete sampling process does not repeat them here as mentioned before.
The above only is embodiments of the invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes instructions of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. the luminance detection method that anti-PWM light source disturbs is characterized in that, comprising:
Receive the pulse-width modulation PWM signal of PWM light source;
When described pwm signal low level, the illumination in the environment is sampled, and obtain intensity of illumination in the environment according to the illumination of sampling;
Wherein, the cycle of described pwm signal is t, and the sampling period is T=nt, and n is positive integer.
2. the luminance detection method disturbed of anti-PWM light source according to claim 1, it is characterized in that, when described pwm signal low level, the illumination in the environment sampled and be specially: when described pwm signal low level, when decaying to of described pwm signal is minimum, the illumination in the environment is sampled.
3. the luminance detection method of anti-PWM light source interference according to claim 1 and 2 is characterized in that cycle and the sampling period of described pwm signal are 10ms.
4. the luminance detection method disturbed of anti-PWM light source according to claim 3 is characterized in that, decaying to when minimum of described pwm signal is: during 9ms behind described pwm signal rising edge.
5. the illumination testing apparatus that anti-PWM light source disturbs is characterized in that, comprising:
Receiver module is for the pulse-width modulation PWM signal that receives the PWM light source;
Detection module is used for when described pwm signal low level the illumination of environment being sampled, and obtains intensity of illumination in the environment according to the illumination of sampling;
Wherein, the cycle of described pwm signal is t, and the sampling period is T=nt, and n is positive integer.
6. the illumination testing apparatus that disturbs of anti-PWM light source according to claim 5, it is characterized in that, described detection module comprises: the sampling submodule is used for when decaying to of described pwm signal is minimum illumination in the environment being sampled when described pwm signal low level.
7. according to claim 5 or the illumination testing apparatus that disturbs of 6 described anti-PWM light sources, it is characterized in that cycle and the sampling period of described pwm signal are 10ms.
8. the illumination testing apparatus that disturbs of anti-PWM light source according to claim 7 is characterized in that, decaying to when minimum of described pwm signal is: during 9ms behind described pwm signal rising edge.
9. the light source adjustment method that anti-PWM light source disturbs is characterized in that, comprising:
Receive the pulse-width modulation PWM signal of PWM light source;
When described pwm signal low level, the illumination in the environment is sampled, and obtain intensity of illumination in the environment according to the illumination of sampling;
Adjust the brightness of described PWM light source based on described intensity of illumination;
Wherein, the cycle of described pwm signal is t, and the sampling period is T=nt, and n is positive integer.
10. the light source adjustment method that disturbs of anti-PWM light source according to claim 9, it is characterized in that, when described pwm signal low level, the illumination in the environment sampled and be specially: when described pwm signal low level, when decaying to of described pwm signal is minimum, the illumination in the environment is sampled.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104599925A CN102944303A (en) | 2012-11-15 | 2012-11-15 | PWM (pulse width modulation) light source interference resistant illumination detection method and device and light source adjusting method |
| PCT/CN2012/085274 WO2014075345A1 (en) | 2012-11-15 | 2012-11-26 | Pwm light source interference-resistant illumination intensity detection method, apparatus and light source adjusting method |
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| CN2012104599925A CN102944303A (en) | 2012-11-15 | 2012-11-15 | PWM (pulse width modulation) light source interference resistant illumination detection method and device and light source adjusting method |
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| WO (1) | WO2014075345A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105372604A (en) * | 2015-08-25 | 2016-03-02 | 马瑞利汽车零部件(芜湖)有限公司 | LED automobile lamp test circuit with over-temperature protection instruction function |
| CN107677606A (en) * | 2017-11-20 | 2018-02-09 | 广东上风环保科技有限公司 | A kind of detection circuit based on photometry |
| CN114283743A (en) * | 2021-12-27 | 2022-04-05 | 深圳市汇顶科技股份有限公司 | Method and device for detecting ambient light under display screen and electronic equipment |
| US12027139B2 (en) | 2021-12-27 | 2024-07-02 | Shenzhen GOODIX Technology Co., Ltd. | Method and apparatus for detecting ambient light under display screen and electronic device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113571027B (en) * | 2020-04-29 | 2022-09-30 | 北京小米移动软件有限公司 | Control method and device for display screen of electronic equipment, electronic equipment and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011057100A (en) * | 2009-09-10 | 2011-03-24 | Autonetworks Technologies Ltd | On-vehicle lamp driving device |
| CN102131331A (en) * | 2011-02-24 | 2011-07-20 | 复旦大学 | Weber's-law-based light-emitting diode (LED) control circuit |
| CN102497702A (en) * | 2011-12-08 | 2012-06-13 | 北京九华互联科技有限公司 | Method and device for controlling combined lamp light |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080284716A1 (en) * | 2005-12-13 | 2008-11-20 | Koninklijke Philips Electronics, N.V. | Display Devices With Ambient Light Sensing |
| US7825891B2 (en) * | 2006-06-02 | 2010-11-02 | Apple Inc. | Dynamic backlight control system |
| CN101889305B (en) * | 2007-12-11 | 2012-09-19 | 夏普株式会社 | Display device and its display method |
| CN102242888A (en) * | 2010-05-12 | 2011-11-16 | 鸿富锦精密工业（深圳）有限公司 | Light-emitting device and method for adjusting light intensity of light-emitting device |
| CN201904071U (en) * | 2010-09-02 | 2011-07-20 | 苏州冠捷科技有限公司 | Separated display apparatus brightness adjusting device based on environmental light |
-
2012
- 2012-11-15 CN CN2012104599925A patent/CN102944303A/en active Pending
- 2012-11-26 WO PCT/CN2012/085274 patent/WO2014075345A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011057100A (en) * | 2009-09-10 | 2011-03-24 | Autonetworks Technologies Ltd | On-vehicle lamp driving device |
| CN102131331A (en) * | 2011-02-24 | 2011-07-20 | 复旦大学 | Weber's-law-based light-emitting diode (LED) control circuit |
| CN102497702A (en) * | 2011-12-08 | 2012-06-13 | 北京九华互联科技有限公司 | Method and device for controlling combined lamp light |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105372604A (en) * | 2015-08-25 | 2016-03-02 | 马瑞利汽车零部件(芜湖)有限公司 | LED automobile lamp test circuit with over-temperature protection instruction function |
| CN105372604B (en) * | 2015-08-25 | 2019-05-07 | 马瑞利汽车零部件(芜湖)有限公司 | A kind of LED car lamp test circuit with overheat protector instruction |
| CN107677606A (en) * | 2017-11-20 | 2018-02-09 | 广东上风环保科技有限公司 | A kind of detection circuit based on photometry |
| CN107677606B (en) * | 2017-11-20 | 2023-12-19 | 广东盈峰科技有限公司 | Detection circuit based on photometry |
| CN114283743A (en) * | 2021-12-27 | 2022-04-05 | 深圳市汇顶科技股份有限公司 | Method and device for detecting ambient light under display screen and electronic equipment |
| US12027139B2 (en) | 2021-12-27 | 2024-07-02 | Shenzhen GOODIX Technology Co., Ltd. | Method and apparatus for detecting ambient light under display screen and electronic device |
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| WO2014075345A1 (en) | 2014-05-22 |
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Application publication date: 20130227 |