CN112577599A - Calibration method and calibration device for optical sensor and display module - Google Patents
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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
- G01J1/4204—Photometry, e.g. photographic exposure meter using electric radiation detectors with determination of ambient light
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- 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
- G09G3/3406—Control of illumination source
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- 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
- G09G3/36—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 using liquid crystals
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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Abstract
The invention discloses a calibration method, a calibration device and a display module of an optical sensor, wherein the calibration method comprises the following steps: acquiring a first light sensation value sensed by a light sensor from a preset light source under a preset environment, wherein the preset light source has a preset light brightness value; acquiring a calibration value of the optical sensor according to the first light sensitivity value and a preset light brightness value; acquiring a second light sensation value sensed by the light sensor from the ambient light; the ambient light brightness is obtained by calibrating the second light sensation value according to the calibration value of the light sensor, the calibration method is simple and easy to use, the reading accuracy of the light sensor is improved, the brightness adjustment difference among different batches or different products is reduced, the consistency and the product quality of the display module are improved, and the user experience and the satisfaction degree are improved.
Description
Technical Field
The invention relates to the technical field of electronic equipment, in particular to a calibration method and a calibration device of an optical sensor and a display module.
Background
In order to clearly Display various contents to a user, most electronic devices are provided with a Display device such as a Liquid Crystal Display (LCD) for displaying backlight. Because the usage scene environment of the electronic device changes more complicatedly and the illumination intensity of the ambient light changes, in order to determine that the content displayed on the display panel can be displayed clearly and maintain the constant visibility of human eyes of a user, the electronic device usually needs to perform backlight adjustment on the display screen of the electronic device.
Currently, some mobile terminals can already realize the function of automatic brightness adjustment, but the function needs to be combined with an Ambient Light Sensor (ALS), which can sense the Ambient light condition and inform a processing chip to automatically adjust the backlight brightness of a display, thereby reducing the power consumption of the product. For example, in mobile applications such as mobile phones, notebooks, tablet computers, etc., the power consumed by the display device is up to 30% of the total power of the battery. The working time of the battery can be prolonged to the maximum extent by adopting the ambient light sensor. On the other hand, the ambient light sensor helps the display device to provide a soft picture. When the ambient brightness is high, the liquid crystal display device using the ambient light sensor automatically adjusts to high brightness. When the external environment is dark, the display device is adjusted to low brightness.
However, in an actual product, under the same ambient light, the data output by the same optical sensor due to the difference of the display module is different, the data output by the optical sensors in different batches under the same display module is also different, further, a touch module is further arranged on the display module, the touch module is also different and can influence the output data of the optical sensor, the display module can provide different backlights according to the output data of the different optical sensors, and the module has different brightness under the same ambient light. Therefore, a method for calibrating a module optical sensor is needed to calibrate the optical sensor, so that the module can show the same brightness under the same ambient light.
Disclosure of Invention
In view of the foregoing problems, an object of the present invention is to provide a calibration method, a calibration device, and a display module for an optical sensor, in which the calibration method improves the accuracy of reading of the optical sensor, reduces the difference of brightness adjustment between different batches or different products, improves the consistency and product quality of the display module, and improves the user experience and satisfaction.
According to an aspect of the present invention, there is provided a calibration method of a light sensor, including:
acquiring a first light sensation value sensed by a light sensor from a preset light source under a preset environment, wherein the preset light source has a preset light brightness value;
acquiring a calibration value of the optical sensor according to the first light sensitivity value and a preset light brightness value;
acquiring a second light sensation value sensed by the light sensor from the ambient light;
and calibrating the second light sensation value according to the calibration value of the light sensor to obtain the ambient light brightness.
Preferably, the method further comprises the following steps: acquiring a calibration coefficient according to the first light sensitivity value and a preset brightness value;
and processing the calibration coefficient to obtain a calibration value.
Preferably, the preset luminance value includes a plurality of different luminance values, a corresponding photosensor calibration initial value is obtained based on each preset luminance value and the corresponding first light sensing value, and the plurality of photosensor calibration initial values are averaged to obtain a final calibration value of the photosensor.
Preferably, the method further comprises storing the calibration value, storing the calibration value in a storage unit, and calling when the light sensor senses the ambient light brightness to calibrate the second light sensation value by using the calibration value.
Preferably, the optical sensor is located below a cover plate of the display module.
According to another aspect of the present invention, there is provided a calibration apparatus for a light sensor, including:
the device comprises an acquisition unit, a processing unit and a control unit, wherein the acquisition unit is used for acquiring a first light sensation value sensed by a light sensor from a preset light source under a preset environment, and the preset light source has a preset light brightness value;
the calibration unit is used for acquiring a calibration value of the optical sensor according to the first light sensitivity value and a preset light brightness value;
the processor unit is used for acquiring a second light sensation value sensed by the light sensor from the ambient light; and calibrating the second light sensation value according to the calibration value of the light sensor to obtain the ambient light brightness.
Preferably, the optical sensor is located below a cover plate of the display module.
Preferably, the preset luminance value includes a plurality of different luminance values, a corresponding photosensor calibration initial value is obtained based on each preset luminance value and the corresponding first light sensing value, and the plurality of photosensor initial values are averaged to obtain a final calibration value of the photosensor.
Preferably, the calibration apparatus comprises the photo sensor as described above, and a signal control unit, a storage unit, the photo sensor, and a backlight driving unit;
when the calibration device receives a calibration instruction, the signal control unit acquires a first light sensation value and stores the calibration value into the storage unit;
after the calibration is finished, the calibration device sends a detection instruction to the processor unit through the signal control unit;
the processor unit acquires a calibration value from the storage unit and a second light sensation value from the light sensor, calibrates the second light sensation value according to the calibration value to obtain the ambient light brightness, and adjusts the backlight driving signal according to the calibrated ambient light brightness;
and the backlight driving unit adjusts the backlight brightness of the display module according to the adjusted backlight driving signal.
Preferably, the storage unit, the light sensor, the signal control unit and the processor unit are connected through an integrated circuit bus, and the backlight driving signal includes a pulse signal.
According to the calibration method, the calibration device and the display module of the optical sensor provided by the invention, the calibration value is obtained by adopting a mode of calibrating the optical sensor on the whole display module, and the optical sensor is corrected by utilizing the calibration value during brightness adjustment, so that the influence of chip difference of the optical sensor and penetration rate difference of a cover plate, touch control and the like in the display module on the optical sensor can be obviously weakened, the condition of ambient light can be more accurately reflected by the calibrated optical sensor reading, the calibration method is simple and easy to use, the reading accuracy of the optical sensor is improved, the brightness adjustment difference among different batches or different products is reduced, the consistency and the product quality of the display module are also improved, and the user experience and the satisfaction degree are favorably improved.
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The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a prior art LCD module with brightness auto-adjustment;
FIG. 2 shows a graphical representation of light sensor readings versus ambient light levels for different modules of the prior art;
FIG. 3 shows a schematic diagram of a calibration arrangement for a light sensor of an example of the invention;
FIG. 4 is a schematic structural diagram illustrating a display module according to an embodiment of the invention for calibrating a light sensor;
FIG. 5 is a schematic diagram illustrating a process for calibrating a display module optical sensor according to an embodiment of the invention;
FIG. 6 is a schematic diagram illustrating signal transmission of a display module for calibrating a light sensor according to an embodiment of the present invention;
FIG. 7 is a schematic software interface diagram of an upper computer for performing optical sensor calibration by the display module according to the embodiment of the invention;
fig. 8 is a diagram showing the ambient light level and the light sensor reading after the light sensor calibration of the display module according to the embodiment of the invention.
Detailed Description
Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples.
Fig. 1 is a schematic diagram of a liquid crystal display module having a brightness automatic adjustment function according to the related art.
As shown in fig. 1, the lcd module with automatic brightness adjustment function in the prior art includes a cover plate 200, a photo sensor 140 under the cover plate 200, and a circuit board 101 (the LED, the lcd panel, etc. are not shown, the cover plate 200, the lcd panel, the LEDs are stacked from top to bottom), wherein, the circuit board 101 is provided with a processor unit 150 and a backlight driving unit 160, the light sensor 140 is connected with the processor unit 150 through the flexible circuit board 102, specifically, external light is emitted from the outer side of the cover plate 200, the light sensor 140 under the cover plate 200 receives the light transmitted through the cover plate 200, and obtains its illumination intensity, the light sensor 140 transmits the illumination intensity information to the processor unit 150 through the flexible circuit board 102, and the processor unit 150 controls the output of the backlight driving unit 160 according to the illumination intensity information to adjust the brightness of the LED, so that the backlight brightness is adapted to the outside illumination.
Fig. 2 shows a relationship diagram between the readings of the optical sensors of the modules and the ambient illuminance in the prior art, although the readings of the optical sensors of the three modules in the diagram are all linearly and positively correlated with the ambient illuminance, the linear relationships of the three modules do not coincide with each other, and there is a large difference, and the readings of the optical sensors of the three modules do not accurately represent the current ambient illuminance, as shown in the liquid crystal display module in fig. 1, which may be caused by the difference in the transmittance of the cover plate and the difference in the optical sensors themselves.
FIG. 3 shows a schematic diagram of a calibration arrangement for a light sensor of an example of the invention; as shown in fig. 3, the calibration apparatus includes: the system comprises an acquisition unit 10, a calibration unit 20 and a processor unit 30, wherein the acquisition unit 10 is configured to acquire a first light sensation value sensed by a light sensor under a preset environment from a preset light source, wherein the preset light source has a preset light brightness value, and the preset light brightness value includes a plurality of different brightness values; the calibration unit 20 is configured to obtain a calibration value of the light sensor according to the first light sensitivity value and the preset light brightness value; the processor unit 30 is used for obtaining a second light sensation value sensed by the light sensor from the ambient light; and calibrating the second light sensation value according to the calibration value of the light sensor to obtain the ambient light brightness.
Fig. 4 is a schematic structural diagram illustrating a display module according to an embodiment of the present invention for calibrating a light sensor, where the display module includes: a communication unit 110, a signal control unit 120, a storage unit 130, a light sensor 140, a processor unit 150, a backlight driving unit 160, a liquid crystal driving unit 170, an LED180, a liquid crystal panel 190, and a cover plate 200. The communication unit 110, the signal control unit 120, the storage unit 130, and the optical sensor 140 are used as a calibration unit 10 for calibrating the optical sensor 140, and during calibration, the communication unit 110 is connected to an upper computer, reads a first light sensitivity value sensed by the optical sensor 140 from a preset light source in a preset environment, corrects the first light sensitivity value according to a preset light brightness value of the preset light source, obtains a calibration value, and stores the calibration value in the storage unit 130. The storage unit 130, the optical sensor 140 and the processor unit 150 are used as an automatic adjustment module 11 for performing brightness automatic adjustment on the display module, when the brightness is automatically adjusted, the processor unit 150 corrects the second light sensation value sensed by the optical sensor 140 according to the calibration value stored in the storage unit 130, obtains the calibrated reading (ambient light brightness) of the optical sensor 140, and the processor unit 150 adjusts the output of the backlight driving unit 160 according to the ambient light brightness.
Specifically, the cover plate 200 further includes, for example, a touch panel 210, the communication unit 110 is connected to the signal control unit 120, the signal control unit 120 is connected to the processor unit 150 and the touch panel 210 of the cover plate 200, the storage unit 130 is connected to the signal control unit 120 and the processor unit 150, similarly, the optical sensor 140 is also connected to the signal control unit 120 and the processor unit 150, and the processor unit 150 is connected to the backlight driving unit 160 and the liquid crystal driving unit 170, wherein the backlight driving unit 160 is used for driving the LEDs 180, the liquid crystal driving unit 170 is used for driving the liquid crystal panel 190, the cover plate 200, the liquid crystal panel 190 and the LEDs are stacked from top to bottom, and the optical sensor 140 is located below the cover plate 200 and the liquid crystal panel 190.
Fig. 5 is a schematic diagram illustrating steps of calibrating a display module optical sensor according to an embodiment of the present invention, where the steps include:
in step S10, acquiring a first light sensing value sensed by the light sensor from a preset light source under a preset environment; in order to avoid the influence of external illumination, the display module is placed in a dark box environment, and the dark box environment is provided with a preset light source for providing a preset light brightness value.
In step S20, obtaining a calibration value of the light sensor according to the first light sensitivity value and the preset light brightness value; the display module is connected with the upper computer through the communication unit, so that the upper computer can obtain a first light sensation value of the light sensor in the display module, and obtain a calibration value of the light sensor based on a preset light brightness value and the first light sensation value, specifically, the calibration value of the light sensor can be obtained by calculating through a group of preset light brightness values and the first light sensation values, or the upper computer can control and convert a plurality of groups of preset light brightness values and the first light sensation values, respectively calculate and obtain a calibration initial value of the light sensor and take the calibration initial value as a final calibration value of the light sensor after averaging, and further, the calibration value can be stored in the storage unit 130.
In step S30, a second light sensation value sensed by the light sensor from the ambient light is obtained; in a normal use environment of the display module, the processor unit 150 obtains a second light sensitivity value sensed from the ambient light from the light sensor 140.
In step S40, calibrating the second light sensation value according to the calibration value of the light sensor to obtain the ambient light brightness; furthermore, the display module can adjust the backlight driving signal based on the calibrated ambient light brightness, so that the backlight brightness of the display module is adjusted.
Fig. 6 is a schematic diagram illustrating signal transmission of the display module according to the embodiment of the present invention to calibrate the optical sensor, where the components and connection relationships in the diagram are already described above and are not repeated.
When calibrating the optical sensor 140, the communication unit 110 is connected to an upper computer (not shown in the figure), the entire display module is placed in a test environment, such as a dark box, in which a preset light source for providing a preset light brightness value is disposed, and a calibration program is installed in the upper computer, specifically, the communication unit 110 is connected to the signal control unit 120 through an Auxiliary interface (AUX), the upper computer obtains a first light sensitivity value D1 of the optical sensor 140 connected to the signal control unit 120 through the signal control unit 120, compares the first light sensitivity value with a preset light brightness value L in the test environment, and obtains a calibration value a, stores the calibration value a in the storage unit 130, and is controlled by the upper computer, so that the signal control unit 120 sends a calibrated signal to the processor unit 150 through a general purpose input/output interface GPIO, and the processor unit 150 can obtain a calibration value a through an Integrated Circuit bus (Inter-Integrated Circuit, IIC) reads the calibration value a from the storage unit 130 as a parameter to process the second light sensation value of the light sensor 140 to obtain a calibrated reading (ambient light brightness) F of the light sensor, generates a corresponding pulse output signal according to the reading F in combination with a Pulse Width Modulation (PWM) transmitted from the timing control module 120, and transmits the signal to the backlight driving unit 160.
Specifically, the whole display module is placed in a dark box, during the calibration process, the upper computer stops the detection of the optical sensor 140 by the processor unit 150 according to the parameter state of the optical sensor 140 in the storage unit 130, so that the integrated circuit bus of the optical sensor 140 is released, the first light sensitivity value D1 of the optical sensor 140 is read by the upper computer through the integrated circuit bus, and the calibration value a is calculated according to the preset light brightness value L in the test environment.
Taking the preset luminance value L of the test environment as 300, and the corresponding uncalibrated first light sensitivity value D1 as 4284 as an example,
conventional calibration protocol:
calibration factor a 1-L/D1, alternate L-300, D1-4284
The calibration coefficient A1 is obtained by calculation and is 0.070
The calibrated reading F of the photosensor is D1 a1, and the reading F of the photosensor can be closer to and reflect the real ambient light brightness value by the correction of the calibration coefficient a 1.
However, since the existing digital storage device is not easy to store the decimal value, the invention adopts another calibration scheme,
the calibration scheme of the invention is as follows:
the calibration value A0-D1-1000/L, the input L-300, D1-4284
The calibrated value A0-14280 is obtained by calculation
The calibrated photosensor reading F-D1 x 1000/a0
The value a0 ═ 14280 can be conveniently stored in the storage unit 130, and when the calibrated photosensor reading F is obtained, the processor unit 150 can obtain the calibrated photosensor reading F by combining the calculation formula and the calibration value a0 according to the detection result of the photosensor 140. Although the calibration values are obtained from a single set of data only by showing the first light sensitivity value corresponding to the light sensor at a single ambient light brightness value, in practical cases, the calibration values may be obtained according to the relationship between a plurality of different preset light brightness values and the first light sensitivity value, so as to enhance the accuracy and reliability of the calibration values. Of course, the calibration coefficients may also be processed to obtain calibration values.
Specifically, the upper computer controls the signal control unit 120 to send a calibrated signal to the processor unit 150 through the general purpose input/output interface GPIO to complete calibration, the display module starts brightness automatic adjustment, the processor unit 150 can read the calibration value a0 from the storage unit 130 through the integrated circuit bus IIC as a parameter to process the second light sensing value of the light sensor 140 to obtain a calibrated light sensor reading (ambient light brightness) F, and corrects the PWM signal according to the reading F in combination with the PWM input signal sent from the timing control module 120, and sends the corrected PWM output signal to the backlight driving unit 160.
FIG. 7 is a schematic software interface diagram of an upper computer for performing optical sensor calibration by the display module according to the embodiment of the invention; in the figure, the light sensor is already connected with the upper computer through the signal control unit and the communication unit, wherein the reading time 2s means that the upper computer continuously reads the signal (first light sensation value) of the light sensor within 2s, the reading interval is 1s, for example, the reading time 2s obtains 2 light sensor signals, and the average value of the two signals is obtained during calculation. The delay time 2s means that after the standard light source is lit for 2s, the signal of the light sensor is read after the strip light source is stabilized. The illumination brightness value represents that the brightness value of a standard light source placed in the dark box is 300, the light sensor data is a first light sensitivity value of the light sensor acquired by the upper computer, and the calibration coefficient and the calibration value are acquired according to various data in calibration by adopting the calculation method.
As shown in fig. 8, after the calibration of the optical sensors of the present invention is performed on the three modules in fig. 2, it can be known from fig. 8 that the calibrated optical sensor readings of the three modules coincide with the line-shaped graphic representation of the ambient light brightness value, and the calibrated optical sensor readings of each module can basically represent the current ambient light brightness value, so that the PWM output signal for driving the LEDs can also correspond to the ambient light more accurately.
While embodiments in accordance with the invention have been described above, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A method of calibrating a light sensor, comprising:
acquiring a first light sensation value sensed by a light sensor from a preset light source under a preset environment, wherein the preset light source has a preset light brightness value;
acquiring a calibration value of the optical sensor according to the first light sensitivity value and a preset light brightness value;
acquiring a second light sensation value sensed by the light sensor from the ambient light;
and calibrating the second light sensation value according to the calibration value of the light sensor to obtain the ambient light brightness.
2. The calibration method according to claim 1, further comprising:
acquiring a calibration coefficient according to the first light sensitivity value and a preset brightness value;
and processing the calibration coefficient to obtain a calibration value.
3. The calibration method according to claim 1, wherein the predetermined brightness value comprises a plurality of different brightness values, and the calibration values of the photo sensors are averaged to obtain the final calibration value of the photo sensors based on each of the predetermined brightness values and the corresponding first photo value.
4. The calibration method according to any one of claims 1 to 3, further comprising storing the calibration value, storing the calibration value in a storage unit, and calling when the light sensor senses the ambient light brightness to calibrate the second light sensation value using the calibration value.
5. The calibration method according to claim 1, wherein the optical sensor is located under a cover plate of the display module.
6. A calibration device for a light sensor, comprising:
the device comprises an acquisition unit, a processing unit and a control unit, wherein the acquisition unit is used for acquiring a first light sensation value sensed by a light sensor from a preset light source under a preset environment, and the preset light source has a preset light brightness value;
the calibration unit is used for acquiring a calibration value of the optical sensor according to the first light sensitivity value and a preset light brightness value;
the processor unit is used for acquiring a second light sensation value sensed by the light sensor from the ambient light; and calibrating the second light sensation value according to the calibration value of the light sensor to obtain the ambient light brightness.
7. The calibration device of claim 6, wherein the light sensor is located under a cover plate of the display module.
8. The calibration device as claimed in claim 6, wherein the predetermined brightness value comprises a plurality of different brightness values, and the calibration initial values of the photo sensors are obtained based on each of the predetermined brightness values and the corresponding first photo values, and the calibration values of the photo sensors are averaged to obtain the final calibration value.
9. A display module comprising the calibration device for the optical sensor according to any one of claims 6 to 8, and a signal control unit, a storage unit, the optical sensor, and a backlight driving unit;
when the calibration device receives a calibration instruction, the signal control unit acquires a first light sensation value and stores the calibration value into the storage unit;
after the calibration is finished, the calibration device sends a detection instruction to the processor unit through the signal control unit;
the processor unit acquires a calibration value from the storage unit and a second light sensation value from the light sensor, calibrates the second light sensation value according to the calibration value to obtain the ambient light brightness, and adjusts the backlight driving signal according to the calibrated ambient light brightness;
and the backlight driving unit adjusts the backlight brightness of the display module according to the adjusted backlight driving signal.
10. The display module according to claim 9, wherein the storage unit, the light sensor, the signal control unit and the processor unit are connected via an integrated circuit bus, and the backlight driving signal comprises a pulse signal.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113984201A (en) * | 2021-11-03 | 2022-01-28 | 武汉华星光电技术有限公司 | Ambient light sensing structure and display panel |
| CN117214108A (en) * | 2023-11-06 | 2023-12-12 | 安徽猫头鹰科技有限公司 | Batch automatic calibration method based on spectrum detection equipment |
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| CN113984201A (en) * | 2021-11-03 | 2022-01-28 | 武汉华星光电技术有限公司 | Ambient light sensing structure and display panel |
| CN117214108A (en) * | 2023-11-06 | 2023-12-12 | 安徽猫头鹰科技有限公司 | Batch automatic calibration method based on spectrum detection equipment |
| CN117214108B (en) * | 2023-11-06 | 2024-02-06 | 安徽猫头鹰科技有限公司 | Batch automatic calibration method based on spectrum detection equipment |
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