CN108267223B - Method and device for calibrating ambient light sensor - Google Patents
Method and device for calibrating ambient light sensor Download PDFInfo
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- CN108267223B CN108267223B CN201710000685.3A CN201710000685A CN108267223B CN 108267223 B CN108267223 B CN 108267223B CN 201710000685 A CN201710000685 A CN 201710000685A CN 108267223 B CN108267223 B CN 108267223B
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- 238000005286 illumination Methods 0.000 claims abstract description 136
- 238000002834 transmittance Methods 0.000 claims abstract description 80
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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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
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Abstract
The invention discloses a method and a device for calibrating an ambient light sensor. The method comprises the following steps: determining an illumination range according to preset standard illumination, standard transmittance and transmittance tolerance; dividing the illumination range into a plurality of illumination intervals, and setting a corresponding weight for each illumination interval; acquiring a predetermined number of illuminance measured by the ambient light sensor; determining an illumination interval where each illuminance is located, and determining an illumination interval with the most accumulated illuminance; and taking the weight value corresponding to the illumination interval with the most accumulated illumination as a calibration value, and calibrating the illumination measured by the ambient light sensor through the calibration value. The invention calibrates the ambient light sensor, namely calibrates the illuminance measured by the ambient light sensor, and improves the accuracy of brightness adjustment of the display screen. The invention considers the problem that the transmittance tolerance is easy to introduce errors in the process of determining the calibration value, thereby avoiding the errors introduced by the transmittance tolerance.
Description
Technical Field
The present invention relates to the field of calibration technologies, and in particular, to a method and an apparatus for calibrating an ambient light sensor.
Background
The terminal needs to adjust the brightness of the display screen according to the brightness of the ambient light, and currently, when the ambient light illuminates the terminal, the terminal generally uses an ambient light sensor to measure the illuminance and adjusts the brightness of the display screen according to the measured illuminance. When measuring illuminance, light irradiates the ambient light sensor through an IR (Infrared) hole, and the AR hole includes a portion of the display glass cover plate and a semi-transparent film. The semi-transparent film is generally black to conceal the internal components of the terminal. The transmittance of the black semi-transparent film is required to be 10%, but the tolerance of transmittance is plus or minus 5%.
In the prior art, the transmittance of the black semi-transparent film is set to 10% by default, and the ambient light sensor is not calibrated, and the brightness of the display screen is adjusted according to the illuminance measured by the ambient light sensor. During adjustment, the brightness and the illuminance of the display screen are in a step-type relationship, that is, the illuminance is divided into a plurality of illuminance ranges in advance, and each illuminance range corresponds to one brightness value. Because a light intensity range corresponds to a brightness value, a wide range exists between two end values of the light intensity range, so that the brightness adjustment of the display screen is not sensitive enough, and the light transmittance of the black semi-transparent film has tolerance, when the light transmittance of the black semi-transparent film is 5% and 15%, the light intensity difference measured by the ambient light sensor is large, so that the light data difference measured by the ambient light sensors of different terminals is large, and the brightness adjustment of the display screen cannot achieve the optimal effect. For example: the light of current environment is darker, and the transmittance of black semi-transparent film is 15%, and the light transmissivity is compared in 10% better of acquiescence, and ambient light sensor measuring illuminance is stronger so, and the luminance of the terminal display screen after the regulation can be higher, has just so appeared in darker environment, the higher problem of display screen luminance.
Disclosure of Invention
The invention provides a method and a device for calibrating an ambient light sensor, which are used for solving the problem of poor brightness adjustment effect of a display screen caused by the fact that the ambient light sensor is not calibrated in the prior art.
In order to solve the technical problems, the invention solves the problems by the following technical scheme:
the invention provides a method for calibrating an ambient light sensor, comprising the following steps: determining an illumination range according to preset standard illumination, standard transmittance and transmittance tolerance; dividing the illumination range into a plurality of illumination intervals, and setting a corresponding weight for each illumination interval; acquiring a predetermined number of illuminance measured by the ambient light sensor; determining an illumination interval where each illuminance is located, and determining an illumination interval with the most accumulated illuminance; and taking the weight value corresponding to the illumination interval with the most accumulated illumination as a calibration value, and calibrating the illumination measured by the ambient light sensor through the calibration value.
Wherein, according to predetermined standard illuminance, standard transmittance and transmittance tolerance, confirm the illuminance scope, include: determining a transmittance range according to the standard transmittance and the transmittance tolerance; and multiplying the standard illumination by the two end values of the transmittance range respectively to obtain the two end values of the illumination range.
Wherein, set up the corresponding weight for every illuminance interval, include: and setting a corresponding weight value for each illumination interval according to the standard illumination and the middle value of each illumination interval.
Wherein the calibrating the illuminance measured by the ambient light sensor by the calibration value comprises: and when the ambient light sensor measures the illuminance, calculating the product of the illuminance and the calibration value to obtain the calibrated illuminance.
Wherein after the calibrating the illuminance measured by the ambient light sensor by the calibration value, further comprising: and converting the calibration illuminance into a current value, and providing the current value for a terminal display screen so as to adjust the brightness of the terminal display screen through the current value.
The invention also provides a device for calibrating an ambient light sensor, comprising: the determining module is used for determining an illumination range according to preset standard illumination, standard transmittance and transmittance tolerance; the setting module is used for dividing the illumination range into a plurality of illumination intervals and setting a corresponding weight for each illumination interval; an obtaining module, configured to obtain a predetermined number of illuminance measured by the ambient light sensor; the determining module is further configured to determine an illumination interval in which each illuminance is located, and determine an illumination interval in which the illuminance is accumulated most; and the calibration module is used for taking the weight value corresponding to the illumination interval with the most accumulated illumination as a calibration value and calibrating the illumination measured by the ambient light sensor through the calibration value.
Wherein the determining module is configured to: determining a transmittance range according to the standard transmittance and the transmittance tolerance; and multiplying the standard illumination by the two end values of the transmittance range respectively to obtain the two end values of the illumination range.
The setting module is configured to set a corresponding weight for each illumination interval according to the standard illumination and the middle value of each illumination interval.
The calibration module is configured to calculate a product of the illuminance and the calibration value to obtain a calibrated illuminance when the ambient light sensor measures the illuminance.
The calibration module is further configured to convert the calibrated illuminance into a current value after the illuminance measured by the ambient light sensor is calibrated by the calibration value, and provide the current value to a terminal display screen, so as to adjust the brightness of the terminal display screen by the current value.
The invention has the following beneficial effects:
the invention calibrates the ambient light sensor, namely calibrates the illuminance measured by the ambient light sensor, and improves the accuracy of brightness adjustment of the display screen. The invention considers the problem that the transmittance tolerance is easy to introduce errors in the process of determining the calibration value, thereby avoiding the errors introduced by the transmittance tolerance.
Drawings
FIG. 1 is a flow chart of a method of calibrating an ambient light sensor according to a first embodiment of the invention;
FIG. 2 is a block diagram of an apparatus for calibrating an ambient light sensor in accordance with a second embodiment of the present invention;
FIG. 3 is an architectural diagram of a calibrated ambient light sensor according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below with reference to the drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Example one
The present embodiments provide a method of calibrating an ambient light sensor. Fig. 1 is a flow chart of a method of calibrating an ambient light sensor according to a first embodiment of the invention.
Step S110, determining an illumination range according to a preset standard illumination, a standard transmittance and a transmittance tolerance.
Standard transmittance refers to the standard transmittance of the terminal IR holes. The transmittance tolerance refers to a tolerance of transmittance. In this embodiment, an ambient light sensor is provided in the terminal to measure the illuminance of light passing through the IR hole of the terminal, and the terminal adjusts the brightness of the display screen according to the illuminance. The IR holes comprise a portion of the display glass cover and a layer of black semi-opaque film, so that the IR holes are light transmissive. In producing the terminal, the transmittance of the IR hole of the terminal is required to be a standard transmittance, but there is a deviation in transmittance that is within a tolerance range in fact. Generally, the standard transmittance (default transmittance) of an IR hole is 10%, the transmittance tolerance is plus or minus 5% (± 5%), and the transmittance is controlled between 5% and 15%.
The standard illuminance refers to illuminance of light irradiated to the ambient light sensor surface. When the ambient light sensor is calibrated, the standard illumination is set according to the environment where the terminal is located and the standard transmittance.
For example: the standard transmittance is 10%; the illuminance of the surface of the terminal display screen in a dark indoor environment is 100lux (lux), and the standard illuminance is set to be 10lux (100lux is multiplied by 10 percent and is 10 lux); the illuminance of the surface of the terminal display screen is 400lux in an indoor conventional environment, the standard illuminance is set to be 40lux, the illuminance of the surface of the terminal display screen is 1500lux in an indoor brighter environment, and the standard illuminance is set to be 150 lux; the illuminance of the surface of the terminal display screen in an outdoor strong light environment is 5000lux, and the standard illuminance is 500 lux.
Determining a transmittance range according to a preset standard transmittance and a transmittance tolerance; and multiplying the standard illumination by the two end values of the transmittance range respectively to obtain the two end values of the illumination range. Further, the tolerance of the light transmittance includes: an upper limit value and a lower limit value; and respectively calculating the sum of the standard transmittance and the upper limit value and the sum of the standard transmittance and the lower limit value, wherein the two values are two end values of the transmittance range, and multiplying the standard illumination by the two end values respectively to obtain the illumination range. For example: the standard illuminance was 500lux, the standard transmittance was 10%, the upper limit value in the transmittance tolerance was + 5%, the lower limit value was-5%, the transmittance range was [ 5%, 15% ], and the illuminance range was [25lux,75lux ].
Step S120, the illumination range is divided into a plurality of illumination intervals, and a corresponding weight is set for each illumination interval.
And setting a corresponding weight value for each illumination interval according to the standard illumination and the middle value of each illumination interval. Further, the standard illuminance is divided by the middle value of the illuminance interval (the illuminance at the middle position of the illuminance interval), and the obtained value is used as the weight corresponding to the illuminance interval. If the number of the illuminance in the illuminance interval is even, two illuminances are arranged at the middle position of the illuminance interval, if the two illuminances have the same value, one of the two illuminances is taken as a middle value, and if the two illuminances have different values, the illuminance with the minimum value is the middle value.
For example: the standard illumination is 500 lux; the illumination range is [25lux,75lux ], the illumination range is divided into 5 intervals, the first illumination interval is [25lux,35lux ], the middle value is 30lux, and the weight corresponding to the first illumination interval is 16.7; the second illumination interval is (35lux,45 lux), the middle value is 40lux, the weight value corresponding to the second illumination interval is 12.5, the third illumination interval is (45lux,55 lux), the middle value is 50lux, the weight value corresponding to the third illumination interval is 10, the fourth illumination interval is (55lux,65 lux), the middle value is 60lux, the weight value corresponding to the fourth illumination interval is 8.33, the fifth illumination interval is (65lux,75 lux), the middle value is 70lux, and the weight value corresponding to the fifth illumination interval is 7.14.
In order to facilitate subsequent query of the end value of each illumination interval and the weight value corresponding to each illumination interval, a display screen brightness configuration table can be formed according to the divided illumination intervals and the weight values corresponding to each illumination interval.
In step S130, a predetermined number of illuminance measured by the ambient light sensor is acquired.
And controlling an ambient light sensor to measure the illuminance under the same ambient condition, acquiring the illuminance which is greater than the minimum end value of the illuminance range and less than the maximum end value of the illuminance range, and counting the preset number of illuminances after acquiring the preset number of illuminances.
The same environmental conditions include: the illuminance on the surface of the terminal display screen is the same. For example: the fixed light source and the terminal display are kept at a fixed distance in a dark room and the terminal display is illuminated with the fixed light source, in which case the illuminance of the surface of the terminal display is considered to be the same. For another example: for office workers, 10 am each day is basically in an office, the ambient light of the office is relatively fixed, and in this case, the illuminance of the surface of the display screen of the terminal is considered to be the same.
In step S140, the illumination interval in which each illuminance is located is determined, and the illumination interval in which the illuminance is accumulated most is determined.
When the preset number of illuminance are counted, the illuminance interval in which each illuminance falls is determined, the number of the illuminance falling into each illuminance interval is counted, and the illuminance interval with the largest number of illuminance falling into each illuminance interval is determined.
Further, a display screen brightness configuration table is inquired, and the illumination interval in which each light illumination falls is determined.
Step S150, using the weight corresponding to the illumination interval as a calibration value, and calibrating the illuminance measured by the ambient light sensor according to the calibration value.
After the calibration value is obtained, when the ambient light sensor measures the illuminance, the product of the illuminance and the calibration value is calculated to obtain the calibration illuminance. And converting the calibrated illuminance into a current value, and providing the current value to the terminal display screen so as to adjust the brightness of the terminal display screen through the current value. Further, the calibration illuminance is converted into a current value by using a preset conversion algorithm.
This embodiment all will calibrate this illuminance to ambient light sensor measuring illuminance at every turn, and the illuminance after the calibration is the calibration illuminance promptly and after dividing by standard transmittance, the ambient light intensity that restores out is close with actual ambient light intensity, can make display screen brightness control more accurate like this.
This embodiment calibrates ambient light sensor, is to the illuminance that ambient light sensor measured promptly and calibrates, improves the degree of accuracy of display screen brightness control. In the process of determining the calibration value, the problem that the transmittance tolerance is easy to introduce errors is considered, so that the errors introduced by the transmittance tolerance are avoided. Through this embodiment, the actual ambient light's of ambient light sensor actual measurement illuminance through the reduction heel luminance value is close, and the uniformity is higher when adjusting display screen luminance according to ambient light, and user experience is better.
Example two
The present embodiments provide an apparatus for calibrating an ambient light sensor. Fig. 2 is a block diagram of an apparatus for calibrating an ambient light sensor according to a second embodiment of the present invention. The device is arranged on the terminal side.
The device includes:
the determining module 210 is configured to determine an illumination range according to a preset standard illumination, a standard transmittance, and a transmittance tolerance.
The setting module 220 is configured to divide the illumination range into a plurality of illumination intervals, and set a corresponding weight for each illumination interval.
An obtaining module 230, configured to obtain a predetermined number of illuminance measured by the ambient light sensor.
The determining module 210 is further configured to determine an illumination interval in which each illuminance is located, and determine an illumination interval in which the illuminance is accumulated most.
And a calibration module 240, configured to use the weight corresponding to the illumination interval as a calibration value, and calibrate the illuminance measured by the ambient light sensor according to the calibration value.
In one embodiment, the determining module 210 is configured to determine a transmittance range according to a preset standard transmittance and a transmittance tolerance; and multiplying the standard illumination by the two end values of the transmittance range respectively to obtain the two end values of the illumination range.
In another embodiment, the setting module 220 is configured to set a corresponding weight value for each of the illuminance intervals according to the standard illuminance and a middle value of each of the illuminance intervals.
In yet another embodiment, the calibration module 240 is configured to calculate a product of the illuminance and the calibration value when the ambient light sensor measures the illuminance, so as to obtain a calibrated illuminance. Further, the calibration module 240 is further configured to, after the illuminance measured by the ambient light sensor is calibrated by the calibration value, convert the calibrated illuminance into a current value, and provide the current value to the terminal display screen, so as to adjust the brightness of the terminal display screen by the current value.
The functions of the apparatus in this embodiment have already been described in the method embodiment shown in fig. 1, so that reference may be made to the related descriptions in the foregoing embodiments for details which are not described in this embodiment.
EXAMPLE III
A more specific embodiment is provided below to illustrate the method for calibrating an ambient light sensor and the method for adjusting the brightness of a display screen according to the present invention. FIG. 3 is an architectural diagram of a calibrated ambient light sensor according to a third embodiment of the present invention.
A calibration value determining stage:
outdoor strong light is simulated by the fixed light source, and the fixed light source irradiates the terminal display screen, so that the illuminance on the surface of the terminal display screen is 5000 lux.
The module is configured to obtain a standard illumination of 500lux based on a standard transmittance of 10%. When the transmittance tolerance is-5%, the transmittance is 5% (10% + (-5%) to 5%), and one end of the illumination range is 250 lux. When the transmittance is + 5%, the transmittance is 15% (10% + (+ 5%) 15%), and the other end of the illumination range is 750 lux. Thus, an illuminance range of [250lux, 750lux ] can be obtained.
The configuration module divides an illumination range into 5 intervals, wherein a first illumination interval is [25lux,35lux ], a second illumination interval is (35lux,45lux ], a third illumination interval is (45lux,55lux ], a fourth illumination interval is (55lux,65lux ], a fifth illumination interval is (65lux,75lux ]. the configuration module sets a corresponding weight value for each illumination interval, the weight value corresponding to the first illumination interval is 16.7(500 lux/30 lux is 16.7, 30lux is a middle value of the first illumination interval), the weight value corresponding to the second illumination interval is 12.5, the weight value corresponding to the third illumination interval is 10, the weight value corresponding to the fourth illumination interval is 8.33, and the weight value corresponding to the fifth illumination interval is 7.14.
The environment light sensor is arranged in the terminal, after the terminal is used for a period of time, the central processing unit can control the environment light sensor to collect a large amount of illuminance, the configuration module can count illuminance distribution conditions of a plurality of illuminance intervals, and the illuminance interval with the largest illuminance distribution is determined according to the illuminance distribution conditions.
For example: when a user awakens the screen from a sleep state every time, recording the illuminance measured by the ambient light sensor, and counting the illuminance which is more than 25lux and less than 75 lux; the method comprises the steps of performing accumulated addition on the times of illuminance falling into [25lux and 35lux ], performing accumulated addition on the times of illuminance falling into (35lux and 45lux ], performing accumulated addition on the times of illuminance falling into (45lux and 55lux ], performing accumulated addition on the times of illuminance falling into (55lux and 65lux ], performing accumulated addition on the times of illuminance falling into (65lux and 75 lux), and comparing which illuminance interval of the several illuminance intervals has the most number of times of illuminance when the number of illuminance intervals falling into the illuminance is counted to be more than 1000 after the illuminance which is more than 25lux and less than 75lux exceeds 1000 times.
The configuration module takes the weight value corresponding to the illumination interval with the maximum number of times of falling into the illumination as the calibration value.
And (3) calibrating the brightness of the display screen:
the central processing unit controls the ambient light sensor to measure the illuminance.
The ambient light sensor communicates the measured light level to the configuration module.
The configuration module inquires the calibration value, multiplies the illuminance by the calibration value to obtain a calibration illuminance, and sends the calibration illuminance to the brightness adjustment module.
The brightness adjusting module converts the calibrated illuminance into a current value and sends the current value to the central processing unit. Further, the brightness adjusting module converts the calibrated illuminance into a current value by using a preset conversion algorithm. The conversion algorithm for converting the calibration illuminance into the current value is, for example:
the function of the calibration illuminance as a function of the current value is y1＝k1x1Wherein y is1Is the current value, x, of the backlight LED lamp1Is the value of the calibration illuminance, k1Is a constant. k is a radical of1Depending on the particular ambient light sensor and display screen. For example, according to actual requirements, the illuminance after calibration is 400lux, the required current value is 5mA, and k is1Is 80 lux/mA. lux is the illuminance unit lux and mA is milli-ampere. The central processing unit receives the current value and provides the current value for the display screen, and the brightness of the display screen is adjusted because the current used by the display screen changes. Further, the current value can be converted into the brightness of the display screen, and the central processing unit directly adjusts the current brightness of the display screen to the brightness of the display screen obtained through conversion.
The functional relation between the brightness of the display screen and the current value is y2＝k2x2Wherein y is2Is the display screen brightness, x2Is the current value, k, of the backlight LED lamp2Is a constant. k is a radical of2Depending on the particular display, different sizes or the same size and different specifications of the display have different values. For example: the maximum display screen brightness is 400cd/m2The maximum current value is 20mA, k2Is 20 cd/(m)2*mA)。
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, and the scope of the invention should not be limited to the embodiments described above.
Claims (10)
1. A method of calibrating an ambient light sensor, comprising:
determining an illumination range according to preset standard illumination, standard transmittance and transmittance tolerance;
dividing the illumination range into a plurality of illumination intervals, and setting a corresponding weight for each illumination interval;
acquiring a predetermined number of illuminance measured by the ambient light sensor;
determining an illumination interval where each illuminance is located, and determining an illumination interval with the most accumulated illuminance;
and taking the weight value corresponding to the illumination interval with the most accumulated illumination as a calibration value, and calibrating the illumination measured by the ambient light sensor through the calibration value.
2. The method of claim 1, wherein determining the illumination range based on the predetermined standard illumination, standard transmittance, and transmittance tolerance comprises:
determining a transmittance range according to the standard transmittance and the transmittance tolerance;
and multiplying the standard illumination by the two end values of the transmittance range respectively to obtain the two end values of the illumination range.
3. The method of claim 1, wherein setting a corresponding weight for each illumination interval comprises:
and setting a corresponding weight value for each illumination interval according to the standard illumination and the middle value of each illumination interval.
4. The method of claim 1, wherein said calibrating the illuminance measured by the ambient light sensor by the calibration value comprises:
and when the ambient light sensor measures the illuminance, calculating the product of the illuminance and the calibration value to obtain the calibrated illuminance.
5. The method of claim 4, after said calibrating the illuminance measured by the ambient light sensor by the calibration value, further comprising:
and converting the calibration illuminance into a current value, and providing the current value for a terminal display screen so as to adjust the brightness of the terminal display screen through the current value.
6. An apparatus for calibrating an ambient light sensor, comprising:
the determining module is used for determining an illumination range according to preset standard illumination, standard transmittance and transmittance tolerance;
the setting module is used for dividing the illumination range into a plurality of illumination intervals and setting a corresponding weight for each illumination interval;
an obtaining module, configured to obtain a predetermined number of illuminance measured by the ambient light sensor;
the determining module is further configured to determine an illumination interval in which each illuminance is located, and determine an illumination interval in which the illuminance is accumulated most;
and the calibration module is used for taking the weight value corresponding to the illumination interval with the most accumulated illumination as a calibration value and calibrating the illumination measured by the ambient light sensor through the calibration value.
7. The apparatus of claim 6, wherein the determination module is to:
determining a transmittance range according to the standard transmittance and the transmittance tolerance;
and multiplying the standard illumination by the two end values of the transmittance range respectively to obtain the two end values of the illumination range.
8. The apparatus of claim 6, wherein the setting module is configured to set a corresponding weight value for each of the illumination intervals according to the standard illumination and a middle value of each of the illumination intervals.
9. The apparatus of claim 6, wherein the calibration module is configured to calculate a product of the illuminance and the calibration value when the ambient light sensor measures the illuminance, so as to obtain the calibrated illuminance.
10. The apparatus of claim 9, wherein the calibration module is further configured to convert the calibrated illuminance into a current value after the illuminance measured by the ambient light sensor is calibrated by the calibration value, and provide the current value to a terminal display screen to adjust the brightness of the terminal display screen by the current value.
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| CN201710000685.3A CN108267223B (en) | 2017-01-03 | 2017-01-03 | Method and device for calibrating ambient light sensor |
| PCT/CN2017/118374 WO2018126929A1 (en) | 2017-01-03 | 2017-12-25 | Method and apparatus for calibrating ambient light sensor |
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| CN201710000685.3A CN108267223B (en) | 2017-01-03 | 2017-01-03 | Method and device for calibrating ambient light sensor |
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| CN108267223B true CN108267223B (en) | 2020-11-03 |
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| CN109637467B (en) * | 2019-02-19 | 2020-10-30 | 昆山龙腾光电股份有限公司 | Display panel and liquid crystal display device |
| CN112116888B (en) * | 2019-06-21 | 2024-01-30 | 北京小米移动软件有限公司 | Screen calibration method, calibration device and storage medium |
| CN111207825B (en) * | 2020-01-10 | 2023-02-07 | Oppo（重庆）智能科技有限公司 | Electronic equipment testing device capable of automatically calibrating and testing device calibration method |
| CN111366238B (en) * | 2020-04-29 | 2022-09-23 | 歌尔科技有限公司 | ALS calibration device based on light intensity adjustable module and calibration method thereof |
| CN113709275A (en) * | 2020-05-21 | 2021-11-26 | 北京小米移动软件有限公司 | Ambient light determination method and device, terminal equipment and storage medium |
| CN112577599A (en) * | 2020-12-23 | 2021-03-30 | 昆山龙腾光电股份有限公司 | Calibration method and calibration device for optical sensor and display module |
| CN113724657B (en) * | 2021-07-23 | 2022-08-23 | 荣耀终端有限公司 | Control method and device for display screen luminescence, electronic equipment and readable storage medium |
| WO2023142059A1 (en) * | 2022-01-29 | 2023-08-03 | 京东方科技集团股份有限公司 | Brightness detection method, computer device and readable medium |
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| CN108267223A (en) | 2018-07-10 |
| WO2018126929A1 (en) | 2018-07-12 |
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