WO2018126929A1 - 校准环境光传感器的方法和装置 - Google Patents

校准环境光传感器的方法和装置 Download PDF

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Publication number
WO2018126929A1
WO2018126929A1 PCT/CN2017/118374 CN2017118374W WO2018126929A1 WO 2018126929 A1 WO2018126929 A1 WO 2018126929A1 CN 2017118374 W CN2017118374 W CN 2017118374W WO 2018126929 A1 WO2018126929 A1 WO 2018126929A1
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Prior art keywords
illuminance
ambient light
transmittance
light sensor
interval
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PCT/CN2017/118374
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English (en)
French (fr)
Inventor
张晓亮
刘辉
冯磊
吴宏超
孙卫山
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中兴通讯股份有限公司
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Publication of WO2018126929A1 publication Critical patent/WO2018126929A1/zh

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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
    • 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
    • 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
    • G09G5/10—Intensity circuits

Definitions

  • the present disclosure relates to the field of calibration techniques, for example, to a method and apparatus for calibrating an ambient light sensor.
  • the terminal needs to adjust the brightness of the display according to the brightness of the ambient light.
  • the terminal when the ambient light illuminates the terminal, the terminal usually uses an ambient light sensor to measure the illuminance, and adjusts the brightness of the display by the measured illuminance.
  • the light is irradiated to the ambient light sensor through an infrared ray (IR) hole, and the IR hole includes a part of the display glass cover and a semi-transparent film.
  • the semi-transmissive film is generally black for hiding internal components of the terminal.
  • the transmittance of the black semi-transparent film is 10%, but the tolerance of the transmittance is plus or minus 5%.
  • the default black semi-transmissive film has a transmittance of 10%
  • the ambient light sensor is not calibrated
  • the brightness of the display screen is adjusted according to the illuminance measured by the ambient light sensor.
  • the brightness and illuminance of the display screen are in a "ladder" relationship, that is, the illuminance is divided into a plurality of illuminance ranges in advance, and each illuminance range corresponds to one brightness value.
  • one illuminance range corresponds to one brightness value
  • the transmittance of the black semi-transparent film has a tolerance when the transmittance of the black semi-transparent film is 5% and 15%, the difference in illuminance measured by the ambient light sensor is large, which results in a large difference in the light data measured by the ambient light sensor of different terminals, so that the brightness of the display screen Adjustment does not achieve the best results.
  • the light in the current environment is dark
  • the transmittance of the black semi-transparent film is 15%
  • the light transmittance is better than the default of 10%
  • the ambient light sensor measures the illuminance more strongly
  • the adjusted terminal display The brightness of the screen will be higher, which leads to the problem of high brightness in the darker environment.
  • the present disclosure provides a method and apparatus for calibrating an ambient light sensor to solve the problem that the related art does not calibrate the ambient light sensor, resulting in poor display brightness adjustment effect.
  • a method for calibrating an ambient light sensor comprising: determining an illuminance range according to a preset standard illuminance, a standard transmittance, and a transmittance tolerance; dividing the illuminance range into a plurality of illuminance intervals, and for each illuminance interval Setting a corresponding weight; acquiring a predetermined number of illuminances measured by the ambient light sensor; determining an illuminance interval in which each illuminance is located, and determining an illuminance interval in which the illuminance is cumulatively the most; and an illuminance interval corresponding to the illuminance cumulatively
  • the value is used as a calibration value and the illuminance measured by the ambient light sensor is calibrated by the calibration value.
  • the determining the illuminance range according to the preset standard illuminance, the standard transmittance and the transmittance tolerance including: determining the transmittance range according to the standard transmittance and the transmittance tolerance;
  • the standard illuminance is multiplied by the two end values of the transmittance range, respectively, to obtain two end values of the illuminance range.
  • the setting a corresponding weight for each illuminance interval includes: setting a corresponding weight for each of the illuminance intervals according to the standard illuminance and an intermediate value of each of the illuminance intervals.
  • the illuminating the illuminance measured by the ambient light sensor by the calibration value comprises: when the ambient light sensor measures the illuminance, calculating a product of the illuminance and the calibration value to obtain a calibrated illuminance.
  • the method further includes: converting the calibration illuminance into a current value, and providing the current value to a terminal display screen to pass the The current value adjusts the brightness of the terminal display.
  • An apparatus for calibrating an ambient light sensor comprising: a determining module configured to determine an illuminance range according to a preset standard illuminance, a standard transmittance, and a transmittance tolerance; and a setting module configured to divide the illuminance range into multiple An illuminance interval, and a corresponding weight is set for each illuminance interval; an acquisition module is configured to acquire a predetermined number of illuminances measured by the ambient light sensor; and the determining module is further configured to determine an illuminance at which each illuminance is located The interval and the illuminance interval for determining the illuminance cumulatively; the calibration module is configured to set a weight corresponding to the illuminance interval in which the illuminance is accumulated the most as a calibration value, and calibrate the illuminance measured by the ambient light sensor by the calibration value.
  • the determining module is configured to: determine a transmittance range according to the standard transmittance and the transmittance tolerance; and multiply the standard illumination by two ends of the transmittance range respectively The value gives the two end values of the illumination range.
  • the setting module is configured to set a corresponding weight for each of the illuminance intervals according to the standard illuminance and an intermediate value of each of the illuminance intervals.
  • the calibration module is configured to calculate a product of the illuminance and the calibration value when the ambient light sensor measures the illuminance, to obtain a calibrated illuminance.
  • the calibration module is further configured to convert the calibration 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 And adjusting the brightness of the display of the terminal by the current value.
  • a computer readable storage medium storing computer executable instructions for performing the method of calibrating an ambient light sensor described above.
  • a terminal comprising one or more processors, a memory and one or more programs, the one or more programs being stored in a memory, the calibration ambient light being performed when executed by one or more processors The method of the sensor.
  • a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to execute Any of the above methods of calibrating an ambient light sensor.
  • the disclosure calibrates the ambient light sensor, that is, calibrates the illuminance measured by the ambient light sensor, and improves the accuracy of the brightness adjustment of the display screen.
  • the present disclosure considers the problem that the transmittance tolerance is easy to introduce an error in the process of determining the calibration value, and avoids the error introduced by the transmittance tolerance.
  • FIG. 1 is a flow chart of a method of calibrating an ambient light sensor in accordance with the present embodiment
  • FIG. 2 is a configuration diagram of an apparatus for calibrating an ambient light sensor according to the present embodiment
  • FIG. 3 is a block diagram of a calibration ambient light sensor in accordance with the present embodiment
  • FIG. 4 is a schematic structural diagram of a hardware of a terminal according to this embodiment.
  • This embodiment provides a method of calibrating an ambient light sensor.
  • 1 is a flow chart of a method of calibrating an ambient light sensor in accordance with the present embodiment.
  • the illuminance range is determined based on preset standard illuminance, standard transmittance, and transmittance tolerance.
  • Standard transmittance refers to the standard transmittance of the terminal IR aperture.
  • Transmittance tolerance refers to the tolerance of transmittance.
  • the ambient light sensor is disposed in the terminal to measure the illuminance of the light passing through the IR hole of the terminal, and the terminal adjusts the brightness of the display according to the illuminance.
  • the IR hole contains a part of the display glass cover and a black semi-transparent film, so the IR hole is translucent.
  • the transmittance of the IR hole of the terminal is required to be the standard transmittance, but in fact there is a deviation in the transmittance, and the deviation is within the tolerance range.
  • the standard transmittance (default transmittance) of the IR aperture is 10%
  • the transmittance tolerance is plus or minus 5% ( ⁇ 5%)
  • the transmittance is controlled between 5% and 15%.
  • the standard illuminance is the illuminance of the light that strikes the surface of the glass cover of the display.
  • calibrating the ambient light sensor set the standard illuminance according to the environment in which the terminal is located.
  • the transmittance range is determined; the standard illuminance is multiplied by the two end values of the transmittance range to obtain the two end values of the illumination range.
  • the transmittance tolerance includes: an upper limit value and a lower limit value; respectively calculating a sum of a standard transmittance and an upper limit value, and a sum of a standard transmittance and a lower limit value, the two values being light transmissive
  • the two end values of the degree range, multiplying the standard illuminance by the two end values, respectively, can obtain the illuminance range.
  • the standard illuminance is 500 lux
  • the standard transmittance is 10%
  • the upper limit of the transmittance tolerance is +5%
  • the lower limit is -5%
  • the transmittance range is [5%, 15%]
  • the illumination range is [25lux, 75lux].
  • the illuminance range is divided into a plurality of illuminance intervals, and corresponding weights are set for each illuminance interval.
  • corresponding weights are set for each illuminance interval.
  • a value is obtained as the weight corresponding to the illuminance interval. If the number of illuminances in the illuminance interval is an even number, there are two illuminances in the middle of the illuminance interval. If the values of the two illuminances are the same, take one of them as an intermediate value, if the values of the two illuminances are different , the illuminance with the smallest value is the middle value.
  • the standard illuminance is 500 lux; the illuminance range is [25 lux, 75 lux], the illuminance range is divided into 5 intervals, the first illuminance interval is [25 lux, 35 lux], the middle value is 30 lux, and the first illuminance interval can be obtained.
  • the weight is 16.7; the second illuminance interval is (35 lux, 45 lux), the middle value is 40 lux, and the weight corresponding to the second illuminance interval is 12.5; the third illuminance interval is (45 lux, 55 lux), and the intermediate value is 50 lux.
  • the weight corresponding to the third illuminance interval is 10; the fourth illuminance interval is (55 lux, 65 lux), the intermediate value is 60 lux, and the weight corresponding to the fourth illuminance interval is 8.33; the fifth illuminance interval is (65 lux, 75 lux], the intermediate value is 70 lux, and the weight corresponding to the fifth illuminance interval is 7.14.
  • a display brightness configuration table may be formed according to the divided illuminance intervals and the weights corresponding to each illuminance interval.
  • step 130 a predetermined amount of illuminance measured by the ambient light sensor is acquired.
  • the ambient light sensor is controlled to measure the illuminance under the same environmental conditions, obtain an illuminance that is greater than the minimum end value of the illuminance range and less than the maximum end value of the illuminance range, and after a predetermined number of illuminances are acquired, the predetermined number of illuminances are counted.
  • the same environmental conditions include: the illuminance of the terminal display surface is the same. For example, keep the fixed light source and the terminal display at a fixed distance in the darkroom and use a fixed light source to illuminate the terminal display. In this case, the illuminance of the terminal display surface is considered to be the same.
  • step 140 an illuminance interval in which each illuminance is located is determined, and an illuminance interval in which the illuminance is accumulated the most is determined.
  • the illuminance interval in which each illuminance falls is determined, and the number of illuminances per illuminance interval is counted, and the illuminance interval in which the number of illuminances is the largest is determined.
  • the illumination interval in which each illuminance falls is determined by querying the display brightness configuration table.
  • step 150 the weight corresponding to the illuminance interval is used as a calibration value, and the illuminance measured by the ambient light sensor is calibrated by the calibration value.
  • 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 calibrated illuminance.
  • the calibration illuminance is converted to a current value and provided to the terminal display to adjust the brightness of the terminal display by the current value.
  • the calibration illuminance is converted to a current value using a preset conversion algorithm.
  • the illuminance is calibrated for each time the ambient light sensor measures the illuminance, and the calibrated illuminance is the calibration illuminance divided by the standard transmittance, and the restored ambient light intensity is similar to the actual ambient light intensity. It can make the brightness adjustment of the display more precise.
  • the ambient light sensor is calibrated, that is, the illuminance measured by the ambient light sensor is calibrated, and the accuracy of the brightness adjustment of the display screen is improved.
  • the present embodiment considers the problem that the transmittance tolerance is easy to introduce an error, thereby avoiding the error introduced by the transmittance tolerance.
  • the measured illuminance of the ambient light sensor is restored to be close to the actual ambient light brightness value, and the consistency is higher when the display screen brightness is adjusted according to the ambient light, and the user experience is better.
  • This embodiment provides an apparatus for calibrating an ambient light sensor.
  • 2 is a configuration diagram of an apparatus for calibrating an ambient light sensor according to the present embodiment. The device is placed on the terminal side.
  • the device includes the following modules.
  • the determining module 210 is configured to determine the illuminance range according to preset standard illuminance, standard transmittance, and transmittance tolerance.
  • the setting module 220 is configured to divide the illuminance range into a plurality of illuminance intervals, and set corresponding weights for each illuminance interval.
  • the obtaining module 230 is configured to acquire a predetermined amount of illuminance measured by the ambient light sensor.
  • the determining module 210 is further configured to determine an illuminance interval in which each illuminance is located, and to determine an illuminance interval in which the illuminance is cumulatively the most.
  • the calibration module 240 is configured to set a weight corresponding to the illuminance interval as a calibration value, and calibrate the illuminance measured by the ambient light sensor by the calibration value.
  • the determining module 210 is configured to determine a transmittance range according to a preset standard transmittance and a transmittance tolerance; and multiply the standard illuminance by two of the transmittance ranges respectively The end values give the two end values of the illumination range.
  • the setting module 220 is configured to set a corresponding weight for each of the illuminance intervals according to the standard illuminance and an intermediate value of each of the illuminance intervals.
  • 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 to obtain a calibrated illuminance. Further, the calibration module 240 is further configured to convert the calibration 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 the terminal a display to adjust the brightness of the display of the terminal by the current value.
  • FIG. 3 is a block diagram of a calibration ambient light sensor in accordance with the present embodiment.
  • the fixed light source 310 simulates the outdoor glare, and the fixed light source 310 illuminates the terminal display screen so that the illuminance of the terminal display surface is 5000 lux.
  • the configuration module 330 sets the standard illumination to 5000 lux.
  • the configuration module divides the illumination range into five intervals, the first illumination interval is [250lux, 350lux], the second illumination interval is (350lux, 450lux), the third illumination interval is (450lux, 550lux), and the fourth illumination interval is ( 550 lux, 650 lux], the fifth illuminance interval is (650 lux, 750 lux).
  • the configuration module sets the corresponding weight for each illuminance interval.
  • the ambient light sensor 320 is disposed in the terminal. After the terminal is used for a period of time, the central processing unit 340 can control the ambient light sensor 320 to collect a large amount of illuminance, and the configuration module 330 can calculate the illuminance distribution of the plurality of illuminance intervals, and according to the The illuminance distribution determines the illuminance interval with the largest illuminance distribution.
  • the illuminance measured by the ambient light sensor is recorded, and the illuminance greater than 25 lux and less than 75 lux is counted; the number of times the illuminance falls into [25 lux, 35 lux] is cumulatively added, The number of times the illuminance falls into (35 lux, 45 lux) is cumulatively added, and the number of times the illuminance falls into (45 lux, 55 lux) is cumulatively added, and the number of times the illuminance falls into (55 lux, 65 lux) is cumulatively added.
  • the cumulative number of times the illuminance falls into (65 lux, 75 lux) is cumulatively added; after the illuminance of more than 25 lux and less than 75 lux is more than 1000 times, which illuminance interval falls into the illuminance most frequently.
  • the configuration module 330 uses the weight corresponding to the illuminance interval that has the highest number of illuminances as the calibration value.
  • the central processor 340 controls the ambient light sensor 320 to measure the illuminance.
  • Ambient light sensor 320 communicates the measured illuminance to configuration module 330.
  • the configuration module 330 queries the calibration value, multiplies the illuminance by the calibration value, obtains the calibration illuminance, and sends the calibration illuminance to the brightness adjustment module 350.
  • the brightness adjustment module 350 converts the calibration illuminance into a current value and transmits the current value to the central processing unit 340.
  • the brightness adjustment module 350 converts the calibration illuminance into a current value using a preset conversion algorithm.
  • the conversion algorithm that converts the calibrated illuminance into a current value is as follows, for example.
  • the central processing unit 340 receives the current value and supplies the current value to the display screen. Since the current used by the display changes, the display brightness is adjusted. Alternatively, the current value can be converted to display brightness, and the central processor 340 directly adjusts the current display brightness to the display brightness obtained by the conversion.
  • the embodiment further provides a computer readable storage medium storing computer executable instructions for performing the above method of calibrating an ambient light sensor.
  • FIG. 4 is a schematic structural diagram of a hardware structure of a terminal according to the embodiment. As shown in FIG. 4, the terminal includes: a processor 410 and a memory 420; and a communication interface 430 and Bus 440.
  • the processor 410, the memory 420, and the communication interface 430 can complete communication with each other through the bus 440.
  • Communication interface 430 can be used for information transmission.
  • Processor 410 can invoke logic instructions in memory 420 to perform any of the above-described methods of calibrating ambient light sensors of the above-described embodiments.
  • the memory 420 may include a storage program area and a storage data area, and the storage program area may store an operating system and an application required for at least one function.
  • the storage data area can store data and the like created according to the use of the electronic device.
  • the memory may include, for example, a volatile memory of a random access memory, and may also include a non-volatile memory. For example, at least one disk storage device, flash memory device, or other non-transitory solid state storage device.
  • the logic instructions in memory 420 described above can be implemented in the form of software functional units and sold or used as separate products, the logic instructions can be stored in a computer readable storage medium.
  • the technical solution of the present disclosure may be embodied in the form of a computer software product, which may be stored in a storage medium, and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) All or part of the steps of the method described in this embodiment are performed.
  • the storage medium may be a non-transitory storage medium or a transitory storage medium.
  • the non-transitory storage medium may include: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. medium.
  • All or part of the process of implementing the foregoing embodiment may be performed by a computer program to indicate related hardware, and the program may be stored in a non-transitory computer readable storage medium, and when the program is executed, may include The flow of an embodiment of the above method.
  • the method and device for calibrating an ambient light sensor calibrates an ambient light sensor, that is, calibrates the illuminance measured by the ambient light sensor, and improves the accuracy of brightness adjustment of the display screen.
  • the present disclosure is in the process of determining the calibration value. The problem that the transmittance tolerance is easy to introduce errors is considered, and the error introduced by the transmittance tolerance is avoided.

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Abstract

一种校准环境光传感器的方法和装置。该方法包括：根据预设的标准照度、标准透光度和透光度公差，确定照度范围；将照度范围划分成多个照度区间，并为每个照度区间设置对应的权值；获取环境光传感器测量的预定数量的光照度；确定每个光照度所处的照度区间，以及确定光照度累计最多的照度区间；将光照度累计最多的照度区间对应的权值作为校准值，并通过校准值校准环境光传感器测量的光照度。该装置由实现该方法的各个步骤对应的模块组成。该方法和装置可以对环境光传感器进行校准，提高显示屏亮度调节的准确度。

Description

校准环境光传感器的方法和装置 技术领域
本公开涉及校准技术领域，例如涉及一种校准环境光传感器的方法和装置。
背景技术
终端需要根据环境光的明暗来调节显示屏的亮度，目前，在环境光照射终端时，终端通常使用环境光传感器来测量光照度，并通过测量到的光照度来调节显示屏的亮度。在测量光照度时，光线通过红外线(Infrared Radiation，IR)孔照射到环境光传感器，IR孔包含部分显示屏玻璃盖板和一层半透光膜。该半透光膜一般为黑色，用于隐藏终端内部部件。该黑色半透光膜的透光度要求是10％，但是透光度的公差是正负5％。
在相关技术中，默认黑色半透光膜的透光度为10％，而且不对环境光传感器进行校准，显示屏的亮度根据环境光传感器测量的光照度进行调节。在调节时，显示屏的亮度和光照度呈“阶梯型”关系，即预先将光照度划分为多个光照度范围，每个光照度范围对应一个亮度值。由于一个光照度范围对应一个亮度值，所以该光照度范围的两个端值之间存在一个很宽的范围，使得显示屏的亮度调节不够灵敏，而且黑色半透光膜的透光度存在公差，当黑色半透光膜的透光度是5％和15％时，环境光传感器测量到的光照度差异较大，这导致不同终端的环境光传感器所测量的光线数据差异较大，使显示屏的亮度调节达不到最佳效果。例如：当前环境的光线较暗，黑色半透光膜的透光度为15％，透光性相较于默认的10％较好，那么环境光传感器测量的光照度较强，调节后的终端显示屏的亮度会较高，这样就出现了在较暗环境中，显示屏亮度较高的问题。
发明内容
本公开提供一种校准环境光传感器的方法和装置，用以解决相关技术不对 环境光传感器进行校准导致显示屏亮度调节效果不佳的问题。
一种校准环境光传感器的方法，包括：根据预设的标准照度、标准透光度和透光度公差，确定照度范围；将所述照度范围划分成多个照度区间，并为每个照度区间设置对应的权值；获取所述环境光传感器测量的预定数量的光照度；确定每个光照度所处的照度区间，以及确定光照度累计最多的照度区间；将所述光照度累计最多的照度区间对应的权值作为校准值，并通过所述校准值校准所述环境光传感器测量的光照度。
其中，所述根据预设的标准照度、标准透光度和透光度公差，确定照度范围，包括：根据所述标准透光度和所述透光度公差，确定透光度范围；将所述标准照度分别乘以所述透光度范围的两个端值，得到所述照度范围的两个端值。
其中，所述为每个照度区间设置对应的权值，包括：根据所述标准照度以及每个所述照度区间的中间值，为每个所述照度区间设置对应的权值。
其中，所述通过所述校准值校准所述环境光传感器测量的光照度，包括：当所述环境光传感器测量到光照度时，计算所述光照度和所述校准值的乘积，得到校准光照度。
其中，在所述通过所述校准值校准所述环境光传感器测量的光照度之后，还包括：将所述校准光照度转换为电流值，并将所述电流值提供给终端显示屏，以通过所述电流值调节所述终端显示屏的亮度。
一种校准环境光传感器的装置，包括：确定模块，设置为根据预设的标准照度、标准透光度和透光度公差，确定照度范围；设置模块，设置为将所述照度范围划分成多个照度区间，并为每个照度区间设置对应的权值；获取模块，设置为获取所述环境光传感器测量的预定数量的光照度；所述确定模块，还设置为确定每个光照度所处的照度区间，以及确定光照度累计最多的照度区间；校准模块，设置为将所述光照度累计最多的照度区间对应的权值作为校准值，并通过所述校准值校准所述环境光传感器测量的光照度。
其中，所述确定模块，是设置为：根据所述标准透光度和所述透光度公差， 确定透光度范围；将所述标准照度分别乘以所述透光度范围的两个端值，得到所述照度范围的两个端值。
其中，所述设置模块，是设置为根据所述标准照度以及每个所述照度区间的中间值，为每个所述照度区间设置对应的权值。
其中，所述校准模块，是设置为当所述环境光传感器测量到光照度时，计算所述光照度和所述校准值的乘积，得到校准光照度。
其中，所述校准模块，还设置为在所述通过所述校准值校准所述环境光传感器测量的光照度之后，将所述校准光照度转换为电流值，并将所述电流值提供给终端显示屏，以通过所述电流值调节所述终端显示屏的亮度。
一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令用于执行上述校准环境光传感器的方法。
一种终端，该终端包括一个或多个处理器、存储器以及一个或多个程序，所述一个或多个程序存储在存储器中，当被一个或多个处理器执行时，执行上述校准环境光传感器的方法。
一种计算机程序产品，所述计算机程序产品包括存储在非暂态计算机可读存储介质上的计算机程序，所述计算机程序包括程序指令，当所述程序指令被计算机执行时，使所述计算机执行上述任意一种校准环境光传感器的方法。
本公开对环境光传感器进行校准，即是对环境光传感器测量的光照度进行校准，提高显示屏亮度调节的准确度。本公开在确定校准值的过程中考虑了透光度公差容易引入误差的问题，避免了透光度公差引入的误差。
附图说明
图1是根据本实施例的校准环境光传感器的方法的流程图；
图2是根据本实施例的校准环境光传感器的装置的结构图；
图3是根据本实施例的校准环境光传感器的架构图；
图4是本实施例提供的一种终端的硬件结构示意图。
具体实施方式
以下结合附图以及实施例，对本公开进行说明。本实施例提供一种校准环境光传感器的方法。图1是根据本实施例的校准环境光传感器的方法的流程图。
在步骤110中，根据预设的标准照度、标准透光度和透光度公差，确定照度范围。
标准透光度是指终端IR孔的标准的透光度。透光度公差是指透光度的公差。在本实施例中，环境光传感器设置在终端中，测量穿过终端IR孔的光线的光照度，终端根据该光照度调节显示屏的亮度。IR孔包含部分显示屏玻璃盖板和一层黑色半透光膜，因此IR孔具有透光性。在生产终端时，要求终端的IR孔的透光度为标准透光度，但事实上透光度会存在偏差，该偏差处于在公差范围之内。一般而言，IR孔的标准透光度(默认透光度)为10％，透光度公差为正负5％(±5％)，透光度控制在5％～15％之间。
标准照度是指照射到显示屏玻璃盖板表面的光线的光照度。在校准环境光传感器时，根据终端所处的环境设置标准照度。
根据预设的标准透光度和透光度公差，确定透光度范围；将标准照度分别乘以透光度范围的两个端值，得到照度范围的两个端值。可选地，透光度公差包括：上限值和下限值；分别计算标准透光度和上限值的和，以及标准透光度和下限值的和，这两个值为透光度范围的两个端值，将标准照度分别乘以这两个端值，可以得到照度范围。例如：标准照度为500lux，标准透光度为10％，透光度公差中的上限值为+5％，下限值为-5％，那么透光度范围是[5％，15％]，照度范围为[25lux，75lux]。
在步骤120中，将照度范围划分成多个照度区间，并为每个照度区间设置对应的权值。
根据标准照度以及每个照度区间的中间值，为每个照度区间设置对应的权值。可选地，使标准照度除以照度区间的中间值(处于照度区间的中间位置的 光照度)，将得到数值作为该照度区间对应的权值。如果照度区间中的光照度的数量为偶数个，则在照度区间的中间位置有两个光照度，若这两个光照度的值相同，则任取其一作为中间值，若这两个光照度的值不同，则值最小的光照度为中间值。
例如：标准照度为500lux；照度范围为[25lux，75lux]，将该照度范围划分为5个区间，第一照度区间为[25lux，35lux]，中间值为30lux，可以得到第一照度区间对应的权值为16.7；第二照度区间为(35lux，45lux]，中间值取40lux，可以得到第二照度区间对应的权值为12.5；第三照度区间为(45lux，55lux]，中间值取50lux，可以得到第三照度区间对应的权值为10；第四照度区间为(55lux，65lux]，中间值取60lux，可以得到第四照度区间对应的权值为8.33；第五照度区间为(65lux，75lux]，中间值取70lux，可以得到第五照度区间对应的权值为7.14。
为方便后续查询每个照度区间的端值，以及每个照度区间对应的权值，可以根据划分的照度区间和每个照度区间对应的权值，形成显示屏亮度配置表。
在步骤130中，获取环境光传感器测量的预定数量的光照度。
控制环境光传感器在相同环境条件下测量光照度，获取大于照度范围的最小端值且小于照度范围的最大端值的光照度，在获取了预定数量的光照度之后，对预定数量的光照度进行统计。
相同环境条件包括：终端显示屏表面的光照度相同。例如：在暗室中使固定光源和终端显示屏保持固定距离，并使用固定光源照射终端显示屏，在这种情况下认为终端显示屏表面的光照度相同。又如：对于上班族而言，每天上午10点钟基本在办公室中办公，办公室的环境光较为固定，在这种情况下认为终端显示屏表面的光照度相同。
在步骤140中，确定每个光照度所处的照度区间，以及确定光照度累计最多的照度区间。
在对预定数量的光照度进行统计时，确定每个光照度落入的照度区间，统 计每个照度区间落入光照度的数量，确定落入光照度的数量最多的照度区间。
可选地，通过查询显示屏亮度配置表，确定每个光照度落入的照度区间。
在步骤150中，将该照度区间对应的权值作为校准值，并通过该校准值校准环境光传感器测量的光照度。
在获得校准值之后，当环境光传感器测量到光照度时，计算光照度和校准值的乘积，得到校准光照度。将校准光照度转换为电流值，并将该电流值提供给终端显示屏，以通过电流值调节终端显示屏的亮度。可选地，利用预设的转换算法，将校准光照度转换为电流值。
本实施例对环境光传感器每次测量出光照度都要对该光照度进行校准，校准后的光照度即校准光照度除以标准透光度后，还原出的环境光强度和实际的环境光强度相近，这样可以使显示屏亮度调节更加精准。
本实施例对环境光传感器进行校准，即是对环境光传感器测量的光照度进行校准，提高显示屏亮度调节的准确度。本实施例在确定校准值的过程中考虑了透光度公差容易引入误差的问题，以避免了透光度公差引入的误差。通过本实施例，环境光传感器实测的光照度经过还原后跟实际的环境光的亮度值接近，在根据环境光调节显示屏亮度时一致性较高，用户体验更好。
本实施例提供一种校准环境光传感器的装置。图2是根据本实施例的校准环境光传感器的装置的结构图。该装置设置在终端侧。
该装置包括以下模块。
确定模块210，设置为根据预设的标准照度、标准透光度和透光度公差，确定照度范围。
设置模块220，设置为将照度范围划分成多个照度区间，并为每个照度区间设置对应的权值。
获取模块230，设置为获取所述环境光传感器测量的预定数量的光照度。
确定模块210，还设置为确定每个光照度所处的照度区间，以及确定光照度累计最多的照度区间。
校准模块240，设置为将该照度区间对应的权值作为校准值，并通过所述校准值校准所述环境光传感器测量的光照度。
在一个实施例中，所述确定模块210，设置为根据预设的标准透光度和透光度公差，确定透光度范围；将所述标准照度分别乘以所述透光度范围的两个端值，得到所述照度范围的两个端值。
在另一实施例中，所述设置模块220，设置为根据所述标准照度以及每个所述照度区间的中间值，为每个所述照度区间设置对应的权值。
在又一实施例中，所述校准模块240，设置为当所述环境光传感器测量到光照度时，计算所述光照度和所述校准值的乘积，得到校准光照度。进一步地，所述校准模块240，还用于在所述通过所述校准值校准所述环境光传感器测量的光照度之后，将所述校准光照度转换为电流值，并将所述电流值提供给终端显示屏，以通过所述电流值调节所述终端显示屏的亮度。
本实施例所述的装置的功能已经在图1所示的方法实施例中进行了描述，故本实施例的描述中未详尽之处，可以参见前述实施例中的相关说明。
下面提供一个实施例，来说明本公开的校准环境光传感器的方法以及显示屏亮度调节方法。图3是根据本实施例的校准环境光传感器的架构图。
确定校准值阶段：
以固定光源310模拟室外强光，固定光源310照射终端显示屏，使终端显示屏表面的光照度为5000lux。
配置模块330设置标准照度为5000lux。当透光度公差为-5％时，则透光度为5％(10％+(-5％)＝5％)，这时照度范围的一个端值为250lux。当透光度为+5％时，则透光度为15％(10％+(+5％)＝15％)，这时照度范围的另一端值为750lux。这样，可以获得照度范围为[250lux，750lux]。
配置模块将照度范围划分为5个区间，第一照度区间为[250lux，350lux]，第二照度区间为(350lux，450lux]，第三照度区间为(450lux，550lux]，第四照度区间为(550lux，650lux]，第五照度区间为(650lux，750lux]。配置模块为每 个照度区间设置对应的权值。第一照度区间对应的权值为16.7(5000lux÷300lux＝16.7，30lux为第一照度区间的中间值)；第二照度区间对应的权值为12.5；第三照度区间对应的权值为10；第四照度区间对应的权值为8.33；第五照度区间对应的权值为7.14。
环境光传感器320设置在终端中，终端在经过一段时间的使用后，中央处理器340可以控制环境光传感器320采集大量的光照度，配置模块330可以统计出多个照度区间的光照度分布情况，并根据光照度分布情况，确定光照度分布最多的照度区间。
例如：在用户每次将屏幕从休眠状态唤醒时，记录环境光传感器测得的光照度，统计大于25lux且小于75lux的光照度；对光照度落入[25lux，35lux]中的次数进行累计相加，对光照度落入(35lux，45lux]中的次数进行累计相加，对光照度落入(45lux，55lux]中的次数进行累计相加，对光照度落入(55lux，65lux]中的次数进行累计相加，对光照度落入(65lux，75lux]中的次数进行累计相加；在统计大于25lux且小于75lux的光照度超过1000次以后，比较这几个照度区间中哪个照度区间落入光照度的次数最多。
配置模块330将落入光照度的次数最多的照度区间对应的权值作为校准值。
校准显示屏亮度阶段：
中央处理器340控制环境光传感器320测量光照度。
环境光传感器320将测量的光照度传递给配置模块330。
配置模块330查询校准值，将该光照度乘以校准值，得到校准光照度，并将校准光照度发送给亮度调节模块350。
亮度调节模块350将校准光照度转换为电流值，并将该电流值发送给中央处理器340。可选地，亮度调节模块350利用预设的转换算法，将校准光照度转换为电流值。该将校准光照度转换为电流值的转换算法例如是如下所述。
校准光照度与电流值的函数关系是y 1＝k 1x 1，其中y 1是背光LED灯的电流值，x 1是校准光照度的值，k 1是常数。k 1根据环境光传感器和显示屏而定。例 如，根据实际需求，校准后光照度为400lux，需要的电流值为5mA，则k 1为80lux/mA。lux为照度单位勒克斯，mA为毫安。中央处理器340收到该电流值，将电流值提供给显示屏，因为显示屏使用的电流发生变化，所以实现显示屏亮度调节。可选地，可以将该电流值转化为显示屏亮度，中央处理器340直接将当前的显示屏亮度调节到转化获得的显示屏亮度。
显示屏亮度与电流值的函数关系是y 2＝k 2x 2，其中y 2是显示屏亮度，x 2是背光LED灯的电流值，k 2是常数。k 2根据显示屏而定，不同尺寸或者相同尺寸不同规格的显示屏具有不同的值。例如：最大的显示屏亮度为400cd/m 2，最大的电流值为20mA，则k 2为20cd/(m 2*mA)。
本实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令用于执行上述校准环境光传感器的方法。
图4是本实施例提供的一种终端的硬件结构示意图，如图4所示，该终端包括：处理器(processor)410和存储器(memory)420；还可以包括通信接口(Communications Interface)430和总线440。
其中，处理器410、存储器420和通信接口430可以通过总线440完成相互间的通信。通信接口430可以用于信息传输。处理器410可以调用存储器420中的逻辑指令，以执行上述实施例的任意一种上述校准环境光传感器的方法。
存储器420可以包括存储程序区和存储数据区，存储程序区可以存储操作系统和至少一个功能所需的应用程序。存储数据区可以存储根据电子设备的使用所创建的数据等。此外，存储器可以包括，例如，随机存取存储器的易失性存储器，还可以包括非易失性存储器。例如至少一个磁盘存储器件、闪存器件或者其他非暂态固态存储器件。
此外，在上述存储器420中的逻辑指令可以通过软件功能单元的形式实现并作为独立的产品销售或使用时，该逻辑指令可以存储在一个计算机可读取存 储介质中。本公开的技术方案可以以计算机软件产品的形式体现出来，该计算机软件产品可以存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本实施例所述方法的全部或部分步骤。
存储介质可以是非暂态存储介质，也可以是暂态存储介质。非暂态存储介质可以包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等多种可以存储程序代码的介质。
实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指示相关的硬件完成的，该程序可存储于一个非暂态计算机可读存储介质中，该程序被执行时，可包括如上述方法的实施例的流程。
工业实用性
本公开提供的校准环境光传感器的方法和装置，对环境光传感器进行校准，即是对环境光传感器测量的光照度进行校准，提高显示屏亮度调节的准确度，本公开在确定校准值的过程中考虑了透光度公差容易引入误差的问题，避免了透光度公差引入的误差。

Claims (11)

  1. 一种校准环境光传感器的方法，包括：
    根据预设的标准照度、标准透光度和透光度公差，确定照度范围；
    将所述照度范围划分成多个照度区间，并为每个照度区间设置对应的权值；
    获取所述环境光传感器测量的预定数量的光照度；
    确定每个光照度所处的照度区间，以及确定光照度累计最多的照度区间；
    将所述光照度累计最多的照度区间对应的权值作为校准值，并通过所述校准值校准所述环境光传感器测量的光照度。
  2. 如权利要求1所述的方法，其中，所述根据预设的标准照度、标准透光度和透光度公差，确定照度范围，包括：
    根据所述标准透光度和所述透光度公差，确定透光度范围；
    将所述标准照度分别乘以所述透光度范围的两个端值，得到所述照度范围的两个端值。
  3. 如权利要求1所述的方法，其中，所述为每个照度区间设置对应的权值，包括：
    根据所述标准照度以及每个所述照度区间的中间值，为每个所述照度区间设置对应的权值。
  4. 如权利要求1所述的方法，其中，所述通过所述校准值校准所述环境光传感器测量的光照度，包括：
    当所述环境光传感器测量到光照度时，计算所述光照度和所述校准值的乘积，得到校准光照度。
  5. 如权利要求4所述的方法，其中，在所述通过所述校准值校准所述环境光传感器测量的光照度之后，所述方法还包括：
    将所述校准光照度转换为电流值，并将所述电流值提供给终端显示屏，以通过所述电流值调节所述终端显示屏的亮度。
  6. 一种校准环境光传感器的装置，包括：
    确定模块，设置为根据预设的标准照度、标准透光度和透光度公差，确定 照度范围；
    设置模块，设置为将所述照度范围划分成多个照度区间，并为每个照度区间设置对应的权值；
    获取模块，设置为获取所述环境光传感器测量的预定数量的光照度；
    所述确定模块，还设置为确定每个光照度所处的照度区间，以及确定光照度累计最多的照度区间；
    校准模块，设置为将所述光照度累计最多的照度区间对应的权值作为校准值，并通过所述校准值校准所述环境光传感器测量的光照度。
  7. 如权利要求6所述的装置，其中，所述确定模块，是设置为：
    根据所述标准透光度和所述透光度公差，确定透光度范围；
    将所述标准照度分别乘以所述透光度范围的两个端值，得到所述照度范围的两个端值。
  8. 如权利要求6所述的装置，其中，所述设置模块，是设置为根据所述标准照度以及每个所述照度区间的中间值，为每个所述照度区间设置对应的权值。
  9. 如权利要求6所述的装置，其中，所述校准模块，是设置为当所述环境光传感器测量到光照度时，计算所述光照度和所述校准值的乘积，得到校准光照度。
  10. 如权利要求9所述的装置，其中，所述校准模块，还设置为在所述通过所述校准值校准所述环境光传感器测量的光照度之后，将所述校准光照度转换为电流值，并将所述电流值提供给终端显示屏，以通过所述电流值调节所述终端显示屏的亮度。
  11. 一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令用于执行权利要求1-5任一项的方法。
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