CN115132136A - Display brightness adjusting method, device, equipment and storage medium - Google Patents
Display brightness adjusting method, device, equipment and storage medium Download PDFInfo
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- CN115132136A CN115132136A CN202110326748.0A CN202110326748A CN115132136A CN 115132136 A CN115132136 A CN 115132136A CN 202110326748 A CN202110326748 A CN 202110326748A CN 115132136 A CN115132136 A CN 115132136A
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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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
- G09G3/3406—Control of illumination 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
- 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
- G09G3/3413—Details of control of colour illumination sources
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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 disclosure relates to a display brightness adjusting method, a display brightness adjusting device and display brightness adjusting equipment. The display brightness adjustment includes: when the brightness level of the display screen reaches a preset brightness level, obtaining a plurality of light leakage characteristic values of the display screen within a preset time and a detection value of ambient light, wherein the preset brightness level corresponds to a critical brightness interval of the display screen before the dimming mode is switched; determining a light leakage predicted value of the display screen according to the plurality of light leakage characteristic values; and determining an illumination value of the ambient light according to the light leakage predicted value and the detection value of the ambient light, wherein the illumination value of the ambient light is used for adjusting the brightness of the display screen. In the disclosure, the light leakage characteristic value with stable fluctuation is selected as the light leakage predicted value, so that the fluctuation of the light leakage brightness is kept stable, the illumination of the predicted environment light is not affected, and stable support is provided for brightness adjustment of the display screen.
Description
Technical Field
The present disclosure relates to, but not limited to, the field of electronic technologies, and in particular, to a method, an apparatus, a device, and a storage medium for adjusting display brightness.
Background
With the demand for high refresh rate of OLED display screens, PWM mode is more and more prone to be applied in the scene where OLED brightness is low, and DC mode is more and more prone to be applied in the scene where OLED brightness is high. The scene with lower OLED brightness has lower illumination corresponding to the external environment light, and the signal-to-noise ratio is poor at this time.
Then, when the dimming mode of the display screen is switched from the PWM mode to the DC mode, the frequency of the brightness adjustment signal of the display screen is unstable, which causes fluctuation in prediction of the brightness of light leakage from the display screen, so that the same fluctuation occurs in prediction of ambient light, and thus the stability of brightness adjustment of the display screen is affected.
Disclosure of Invention
The disclosure provides a display brightness adjusting method, a display brightness adjusting device and a storage medium, so as to provide stable support for adjusting the brightness of a display screen.
According to a first aspect of the embodiments of the present disclosure, there is provided a display luminance adjusting method, including: when the brightness level of the display screen reaches a preset brightness level, obtaining a first light leakage characteristic value of the display screen within a preset time period and a detection value of ambient light, wherein the preset brightness level corresponds to a critical brightness interval of the display screen, the critical brightness interval comprises a plurality of brightness values before the display screen is switched from a pulse dimming mode to a direct current dimming mode, and the detection value of the ambient light is detected by a light sensor; determining a second light leakage characteristic value according to the first light leakage characteristic value, wherein the fluctuation degree of the first light leakage characteristic value in a preset time length is larger than that of the second light leakage characteristic value; determining a light leakage predicted value of the display screen according to the second light leakage characteristic value; and determining an illumination value of the ambient light according to the light leakage predicted value and the detection value of the ambient light, wherein the illumination value of the ambient light is used for adjusting the brightness of the display screen.
In the above scheme, before obtaining the first light leakage characteristic value of the display screen within the preset time, the method further includes: monitoring the brightness level of the display screen; and determining whether the brightness level of the display screen reaches a preset brightness level.
In the above scheme, determining the second light leakage characteristic value according to the first light leakage characteristic value includes: averaging the first light leakage characteristic values, and determining the average value as a second light leakage characteristic value; or, the maximum value and/or the minimum value in the first light leakage characteristic value are/is removed, and the average value of the removed first light leakage characteristic value is determined as the second light leakage characteristic value.
In the above scheme, determining the second light leakage characteristic value according to the first light leakage characteristic value includes: generating a first fluctuation curve corresponding to the first light leakage characteristic value; matching the first fluctuation curve with a plurality of second fluctuation curves, wherein the second fluctuation curves are obtained by training according to light leakage characteristic values of a display screen when different display contents are displayed and light leakage illumination values of a display; and determining a first light leakage characteristic value corresponding to a third fluctuation curve as a second light leakage characteristic value, wherein the third fluctuation curve is a fluctuation curve matched with the first fluctuation curve in the plurality of second fluctuation curves.
In the above aspect, after determining the second light leakage characteristic value according to the first light leakage characteristic value, the method further includes: and correcting the second light leakage characteristic value of the display screen by using the attenuation coefficient.
In the above aspect, determining an illuminance value of the ambient light based on the leak light prediction value and a detection value of the ambient light includes: obtaining the brightness value of the ambient light by making a difference between the detection value of the ambient light and the light leakage prediction value; and determining the illumination value of the ambient light according to the brightness value of the ambient light and the illumination calculation coefficient.
According to a second aspect of the embodiments of the present disclosure, a display brightness adjusting apparatus is provided, where the display brightness adjusting apparatus may be a chip or a system on a chip in an electronic device, and may also be a functional module in the electronic device for implementing the method according to any embodiment of the present disclosure. The display brightness adjusting device can realize functions executed by the electronic equipment in any embodiment of the disclosure, and the functions can be realized by executing corresponding software through hardware. The hardware or software comprises one or more modules corresponding to the functions. Display brightness adjusting device includes: the device comprises an obtaining unit, a processing unit and a control unit, wherein the obtaining unit is used for obtaining a first light leakage characteristic value of a display screen within a preset time length and a detection value of ambient light when the brightness level of the display screen reaches a preset brightness level, and the preset brightness level corresponds to a critical brightness interval of the display screen before the dimming mode is switched; the determining unit is used for determining a second light leakage characteristic value according to the first light leakage characteristic value, and the fluctuation degree of the first light leakage characteristic value is greater than that of the second light leakage characteristic value; determining a light leakage predicted value of the display screen according to the second light leakage characteristic value; and determining an illumination value of the ambient light according to the light leakage predicted value and the detection value of the ambient light, wherein the illumination value of the ambient light is used for adjusting the brightness of the display screen.
In the above scheme, the device further includes a monitoring module, configured to monitor a brightness level of the display screen before the obtaining module obtains the first light leakage characteristic value; and determining whether the brightness level of the display screen reaches a preset brightness level.
In the above scheme, the determining unit is configured to average the first light leakage characteristic value, and determine the average as the second light leakage characteristic value; or, the maximum value and/or the minimum value in the first light leakage characteristic values are/is removed, and the average value of the removed first light leakage characteristic values is determined as a second light leakage characteristic value.
In the above scheme, the determining unit is configured to generate a first fluctuation curve corresponding to a first light leakage characteristic value; matching the first fluctuation curve with a plurality of second fluctuation curves, wherein the second fluctuation curves are obtained by training according to light leakage characteristic values of a display screen when different display contents are displayed and light leakage illumination values of a display; and determining a first light leakage characteristic value corresponding to a third fluctuation curve as a second light leakage characteristic value, wherein the third fluctuation curve is a fluctuation curve matched with the first fluctuation curve in the plurality of second fluctuation curves.
In the above scheme, the determining unit is further configured to correct the second light leakage characteristic value using the attenuation coefficient after determining the second light leakage characteristic value.
In the above scheme, the determining unit is further configured to obtain a brightness value of the ambient light by subtracting the detected value of the ambient light from the predicted value of the light leakage; and determining the illumination value of the ambient light according to the brightness value of the ambient light and the illumination calculation coefficient.
According to a third aspect of an embodiment of the present disclosure, there is provided an electronic apparatus including: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to: when the executable instructions are executed, the method for adjusting the display brightness in any embodiment of the disclosure is realized.
In the above scheme, the electronic device further includes: a light sensor coupled to the processor; and the light sensor is used for detecting the detection value of the ambient light.
According to a fourth aspect of the embodiments of the present disclosure, there is provided a computer-readable storage medium storing an executable program, wherein the executable program, when executed by a processor, implements the display brightness adjustment method in any of the embodiments of the present disclosure.
The technical scheme provided by the disclosure can comprise the following beneficial effects:
in the disclosure, the light leakage characteristic value with stable fluctuation is selected as the light leakage predicted value, so that the fluctuation of the light leakage brightness is kept stable, the illumination of the predicted environment light is not affected, and stable support is provided for brightness adjustment of the display screen.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another electronic device provided in the embodiment of the present disclosure;
fig. 3 is a schematic diagram of a PWM signal provided by an embodiment of the present disclosure;
fig. 4 is a schematic diagram illustrating an implementation flow of a method for adjusting display brightness according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of a display brightness adjusting apparatus according to an embodiment of the disclosure.
Detailed Description
The embodiments of the present disclosure are described below with reference to the drawings in the embodiments of the present disclosure. In the following description, reference is made to the accompanying drawings which form a part hereof and in which is shown by way of illustration specific aspects of embodiments of the disclosure or in which aspects of embodiments of the disclosure may be practiced. It should be understood that the disclosed embodiments may be used in other respects, and may include structural or logical changes not depicted in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present disclosure is defined by the appended claims. For example, it should be understood that the disclosure in connection with the described methods may equally apply to the corresponding apparatus or system for performing the described methods, and vice versa. For example, if one or more particular method steps are described, the corresponding apparatus may comprise one or more units, such as functional units, to perform the described one or more method steps (e.g., a unit performs one or more steps, or multiple units, each of which performs one or more of the multiple steps), even if such one or more units are not explicitly described or illustrated in the figures. On the other hand, for example, if a particular apparatus is described based on one or more units, such as functional units, the corresponding method may comprise one step to perform the functionality of the one or more units (e.g., one step performs the functionality of the one or more units, or multiple steps, each of which performs the functionality of one or more of the plurality of units), even if such one or more steps are not explicitly described or illustrated in the figures. Further, it is to be understood that features of the various exemplary embodiments and/or aspects described herein may be combined with each other, unless explicitly stated otherwise.
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure, where the electronic device may be a smart phone, a tablet computer, a wearable device, an in-vehicle device, an electronic terminal, a portable terminal, and the like, and for convenience of description, the electronic device is referred to as an electronic device in the embodiment of the present disclosure. The structure of the electronic device will be described below by taking an example in which the electronic device is a smart phone (hereinafter, simply referred to as a mobile phone).
Referring to fig. 1, the mobile phone 100 may include: radio Frequency (RF) circuitry 110, memory 120, other input devices 130, an organic light-emitting diode (OLED) display 140, a sensor assembly 150, audio circuitry 160, an input/output (I/O) subsystem 170, a processor 180, and a power supply 190. The processor 180 is connected to the RF circuit 110, the memory 120, the audio circuit 160, and the power supply 190. The I/O subsystem 170 is coupled to the other input devices 130, the OLED display screen 140, and the sensor assembly 150, respectively.
The RF circuit 110 may be used for transceiving information or for receiving and transmitting signals during a call. In general, the RF circuit 110 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In some embodiments, the RF circuitry 110 may also communicate with the network and other devices via wireless communications, such as a wireless fidelity (Wi-Fi) network with access network devices.
The memory 120 may be used to store software programs, and the processor 180 executes various functional applications and data processing of the mobile phone 100 by operating the software programs stored in the memory 120. The memory 120 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data (e.g., audio data, image data, contact data, etc.) created according to the use of the cellular phone 100, and the like. In some embodiments, memory 120 may include high speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The OLED display 140 may be used to display information input by or provided to a user and various menus of the mobile phone 100, and may also accept input from the user. The OLED display screen 140 may include a display panel 141 and a touch panel 142. In the embodiment of the present disclosure, the display panel 141 in the OLED display screen 104 may be provided in the form of OLEDs, for example, the display panel 141 may include an OLED array including rows and columns of OLEDs.
The sensor assembly 150 includes one or more sensors for providing various aspects of the collected data to the handset 100. In the embodiment of the present disclosure, the sensor assembly 150 may include a light sensor (e.g., an ambient light sensor 151) for collecting data such as ambient light illuminance to adjust the automatic backlight brightness of the OLED display screen 140. Further, the sensor assembly 150 may further include a temperature sensor, an acceleration sensor, a gyro sensor, a magnetic sensor or a pressure sensor, and the temperature change of the mobile phone 100, the acceleration/deceleration, the orientation, the on/off state of the mobile phone 100, or the relative positioning of the components, etc. may be detected by the sensor assembly 150. In addition, the sensor assembly 150 may also include an image sensor for use in imaging applications.
The audio circuitry 160 can provide an audio interface between the user and the handset 100, such as the audio circuitry 160 providing an audio interface between the user and the handset 100 through a speaker and a microphone. The audio circuit 160 may transmit the electrical signal obtained by converting the received audio data to a speaker, and convert the electrical signal into a sound signal for output; on the other hand, the microphone converts the collected sound signal into an electrical signal, which is received by the audio circuit and converted into audio data, which is then output to the RF circuit 110 for transmission to, for example, another cell phone, or to the memory 120 for further processing.
The I/O subsystem 170 may be used to control input and output peripherals, which may include other device input controllers, sensor controllers, display controllers, and the like.
The processor 180 is a control center of the mobile phone 100, connects various parts of the entire mobile phone by using various interfaces and lines, and performs various functions of the mobile phone 100 and processes data by operating or executing software programs stored in the memory 120 and calling data stored in the memory 120, thereby integrally monitoring the mobile phone 100. Alternatively, processor 180 may include one or more processing units. Illustratively, the processor 180 may integrate an Application Processor (AP), which mainly handles an operating system, a user interface, applications, etc., and a modem processor (modem), which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 180.
A power supply 190, such as a battery, is used to power the various components described above. The power supply 190 may be logically connected to the processor 180 through a power management system, so as to manage charging, discharging, power consumption, and the like through the power management system.
In the disclosed embodiment, the OLED display screen 140 may be covered over the ambient light sensor 151. The ambient light sensor 151 may be covered by the top of the OLED display screen 140, or by the middle of the OLED display screen 140, or by the bottom of the OLED display screen 140. In the embodiment of the present disclosure, referring to fig. 2, it is exemplified that the ambient light sensor 151 is covered by the top of the OLED display screen 140.
In the embodiment of the present disclosure, the mobile phone 100 may be a full-screen mobile phone, and certainly, may also be a non-full-screen mobile phone, as long as the OLED display screen in the mobile phone is disposed above the ambient light sensor, which is not specifically limited in this embodiment of the present disclosure.
It is to be understood that the structure of the mobile phone 100 shown in fig. 1 is not limited to the mobile phone in the embodiment of the present disclosure. The mobile phone in the embodiment of the present disclosure may include more components, fewer components, a combination of certain components or different component arrangements than those shown in fig. 1, and the embodiment of the present disclosure is not particularly limited in this respect.
In combination with the structure of the mobile phone, unlike a Liquid Crystal Display (LCD), an OLED display is not backlit, each pixel in the OLED display is illuminated by a light emitting transistor, and different images can be displayed by controlling the illumination of each light emitting transistor.
In practical applications, for an OLED display screen, the adjustment mode (i.e. dimming mode) of the overall brightness is mainly and not limited to the following two modes:
first, a pulse-width modulation (PWM) mode.
In the PWM mode, a duty cycle adjustment signal is required (e.g., the duty cycle adjustment signal may be a square wave signal with a frequency of 240 Hz). The lighting time of each OLED in the OLED display screen is controlled through the PWM signal (namely the duty ratio adjusting signal). For example, fig. 3 is a schematic diagram of a PWM signal provided by an embodiment of the present disclosure, referring to fig. 3, when the PWM signal is at a low level, the OLED is turned off, and at this time, the ambient light sensor disposed below the OLED may collect ambient light; and when the PWM signal is high, the OLED starts (or is called lit). Then, the collected data are traversed to obtain smaller numerical values, and the numerical values are transmitted to a light intensity conversion model to realize the conversion of the light intensity numerical values, so that the illuminance value of the external environment light is obtained. And finally, adjusting the brightness of each OLED of the OLED display screen according to the illuminance value of the external environment light. At this time, since the OLED is turned off, the data collected by the ambient light sensor is not affected by the OLED light leakage, which improves the accuracy of the brightness adjustment of the OLED.
It should be noted that the OLED display screen performs refresh display in the form of frames (frames) when displaying display contents such as images and videos, and refresh display of each frame may be refreshed line by line in the order from top to bottom, so that the display contents of one frame need to be refreshed many times. During the refreshing process of one frame, the OLED of the display screen area refreshed at each time is turned from on to off. Therefore, in the PWM mode, the OLED can refresh the display content according to the PWM signal. When the OLED display screen finishes refreshing the display content of a whole frame, a display synchronization signal is output, and the display synchronization signal can be used for indicating that the refreshing of the display content of the frame is finished.
Second, Direct Current (DC) mode.
In the DC mode, the duty ratio adjusting signal is not needed, but the brightness of the OLED display screen is adjusted by changing the supply current, the supply voltage, and the like.
However, with the demand for high refresh rate of OLED display screen, PWM mode is more and more prone to be applied in the scene where OLED brightness is low, and DC mode is more and more prone to be applied in the scene where OLED brightness is high. The scene with lower OLED brightness has lower illumination corresponding to the external environment light, and the signal-to-noise ratio is poor at this time. Then, when the dimming mode of the display screen is switched from the PWM mode to the DC mode, the frequency of the brightness adjustment signal of the display screen is unstable, which causes fluctuation in prediction of the light leakage brightness of the display screen, so that the same fluctuation occurs in prediction of the ambient light, and thus the stability of the brightness adjustment of the display screen is affected.
In order to solve the above problem, an embodiment of the present disclosure provides a display brightness adjusting method, which can be applied to a display brightness adjusting apparatus, where the display brightness adjusting apparatus can be the electronic device or a chip or a system on chip in the electronic device.
First, a DC dimming procedure according to an embodiment of the present disclosure is described.
Firstly, obtaining a spectral response signal F of each channel of an ambient light sensor i (λ); here, i denotes a channel of the ambient light sensor, i ═ C/R/G/B, C denotes a clear (clear) channel, R denotes a red channel, G denotes a green channel, B denotes a blue channel, and λ denotes a spectral wavelength.
Second step, obtaining spectral function F of different light sources j (lambda); j is 1,2,3, … …, n, n is positive integer.
For example, the light source may be a Cool White Fluorescent (CWF) light source, an a light source, a D50 light source, a U30 light source, a TL84 light source, an H light source, or the like.
Thirdly, calculating the response convolution spectrum function of each channel
Fourthly, calculating the spectral time domain characteristic of the light leakage of the display screen detected by each channel
Fifthly, if the refreshing base frequency of the display screen is set to be f, the frequency multiplication is set to be mf, and the value of m can be a positive integer, calculating the light leakage of the display screen detected by each channelSpectral frequency domain characteristics
Here, spectral frequency domain characteristics
And may also be understood as a light leakage characteristic value.
The sixth step is to get the above
The light leakage calculation model f (y) is brought in, and the light leakage predicted value f of each channel is calculated i (y i ) (ii) a Wherein, the first and the second end of the pipe are connected with each other,
f i (y i )＝a i y i n +b i y i n-1 +c i y i n-2 +......+z i y i 0 。
here, a is as described above i 、b i 、c i 、……、z i Is preset.
Seventhly, acquiring a detection value Register of the ambient light acquired by the ambient light sensor i (y i )；
Eighth step, calculating brightness value of each channel environment light i (y i )＝Register i (y i )-f i (y i )；
Ninth, calculating the illumination value Lux of the environment light of each channel i ＝dgf×k ij ×Ambient i 。
Dgf is a device factor of the display screen, which is used to characterize the influence of the hardware of the display screen on the brightness of the OLED; k is a radical of formula ij Coefficients are calculated for the illumination of each channel under different light sources. Here, the illuminance calculation coefficient is set in advance.
Fig. 4 is a schematic implementation flow diagram of a display brightness adjustment method according to an embodiment of the present disclosure, and referring to fig. 4, the method may include:
s401, when the brightness level of the display screen reaches a preset brightness level, obtaining a plurality of first light leakage characteristic values of the display screen within a preset time and a detection value of ambient light.
It can be understood that the brightness of the OLED may fluctuate near the switching point between the PWM mode and the DC mode, and then the display brightness adjusting apparatus may continuously monitor the brightness level of the display screen and determine whether the current brightness level of the display screen reaches the preset brightness level, that is, determine whether the current brightness level of the display screen reaches the brightness level corresponding to the fluctuation area. If the brightness level of the display screen is determined to reach the preset brightness level, the display brightness adjusting device can calculate a plurality of first light leakage characteristic values (namely y) of the display screen within the preset time length through the first step to the fifth step of the process i ) And obtaining a detection value of the ambient light (i.e., Register) by the seventh step i (y i )). Or, the display screen may determine whether the current brightness level of the display screen reaches a preset brightness level, if so, send an instruction to the display brightness adjustment device to instruct the display brightness adjustment device to predict the illuminance of the ambient light, the display brightness adjustment device responds to the instruction, and a plurality of first light leakage characteristic values (i.e., y) of the display screen are calculated within a preset time period through the first step to the fifth step of the above process i ) And obtaining a detection value of the ambient light (i.e., Register) through the seventh step i (y i ))。
Illustratively, the brightness of the OLED may fluctuate between 400nit and 439 nit.
S402, determining a light leakage predicted value of the display screen according to the plurality of light leakage characteristic values.
It is understood that, in order to avoid the leakage light brightness fluctuation caused by the brightness fluctuation of the OLED, the display brightness adjustment apparatus calculates a plurality of first leakage light characteristic values (i.e., y) through S401 i ) Then, a more stable second light leakage characteristic value can be obtained in the following manner.
In the first mode, the display luminance adjusting apparatus may average the plurality of light leakage characteristic values and determine the average value as the second light leakage characteristic value. Alternatively, the display luminance adjusting apparatus may further remove a maximum value and/or a minimum value of the plurality of first light leakage characteristic values, and determine an average value of the plurality of first light leakage characteristic values after removal as the second light leakage characteristic value. Of course, the display luminance adjusting apparatus may also select a median value of the first leak characteristic values as the second leak characteristic value. The average value or the mean value of the fluctuating light leakage characteristic values is selected as the light leakage predicted value, so that the light leakage brightness fluctuation is ignored, the illumination of the predicted ambient light is not influenced, and stable support is provided for the brightness adjustment of the display screen.
Second, the electronic device may also be placed in a dark room (where the ambient light illumination value is equal to or approximately equal to 0). When the brightness level of the display screen reaches the preset brightness level, the display screen can display different display contents, such as a pure red image, a pure white image, a pure green image and the like, so as to provide different light sources. When the display screen displays different contents and the brightness level is not changed, the display brightness adjusting device can obtain a plurality of groups of light leakage characteristic values through the first step to the fifth step, and obtain a detection value of the ambient light (which can also be understood as a light leakage illumination value of the display screen) when the display screen displays different contents through the seventh step. Then, the display brightness adjusting device can train to obtain a fluctuation curve a (i.e., a second fluctuation curve) of the light leakage characteristic values corresponding to the detection values of different ambient lights according to the plurality of groups of light leakage characteristic values and the detection values of the ambient lights, so as to reflect the fluctuation condition of the brightness of the display screen in different display contents. Because the display screen is placed in the darkroom environment, the light rays collected by the ambient light sensor all come from OLED light leakage, and at the moment, the fluctuation of the display screen light leakage is stable, namely the fluctuation condition of the second fluctuation curve is stable.
Then, the display luminance adjusting apparatus may generate the fluctuation curve B (i.e., the first fluctuation curve) corresponding to the plurality of first leak characteristic values described above after performing S401, and match the fluctuation curve a with the fluctuation curve B to match a fluctuation curve B' (i.e., the third fluctuation curve) that is identical to or close to the fluctuation condition of the fluctuation curve B from among the plurality of fluctuation curves a. Then, the display luminance adjusting apparatus may determine the first light leakage characteristic value corresponding to the fluctuation curve B' as the second light leakage characteristic value. Because the fluctuation condition of the fluctuation curve B 'is stable, the light leakage characteristic value corresponding to the fluctuation curve B' with stable fluctuation is selected to calculate the light leakage predicted value, so that the stable light leakage predicted value can be obtained, and the illumination of the stable environment light can be calculated, so as to provide stable support for the brightness adjustment of the display screen.
Of course, the display brightness adjusting apparatus may also obtain a relatively stable light leakage characteristic value by using other methods, and the embodiment of the disclosure is not particularly limited.
In some possible embodiments, in order to further reduce the fluctuation of the illuminance value of the ambient light caused by the fluctuation, in S402, after the display luminance adjusting apparatus obtains the second leak characteristic value, the second leak characteristic value may be further multiplied by an attenuation coefficient to correct the leak characteristic value.
S403, determining a light leakage predicted value f according to the second light leakage characteristic value i (y i )。
It can be understood that, after the display luminance adjusting apparatus obtains the second light leakage characteristic values through the calculation in S402, the display luminance adjusting apparatus may bring the light leakage characteristic values into the sixth step to calculate the light leakage prediction values.
And S404, determining an illumination value of the ambient light according to the light leakage predicted value and the detection value of the ambient light.
Wherein the illuminance value of the ambient light is used to adjust the brightness of the display screen.
It is understood that, after the leak light prediction value is calculated in S402, the display luminance adjusting apparatus may obtain the luminance value of the ambient light by subtracting the detected value of the ambient light from the leak light prediction value as described in the eighth step. And multiplying the brightness value of the ambient light by a preset illumination calculation coefficient according to the ninth step to obtain an illumination value of the ambient light.
In some possible embodiments, the display brightness adjusting device may transmit the calculated illuminance value of the ambient light to the display screen, so that the display screen may adjust the brightness of the OLED according to the illuminance value of the ambient light, so as to achieve stable brightness adjustment.
The brightness adjustment process of the display screen at the preset brightness level is completed.
In the disclosure, the light leakage characteristic value with stable fluctuation is selected as the light leakage predicted value, so that the fluctuation of the light leakage brightness is kept stable, the illumination of the predicted environment light is not affected, and stable support is provided for brightness adjustment of the display screen.
Based on the same inventive concept, the embodiments of the present disclosure further provide a display brightness adjusting apparatus according to a second aspect of the embodiments of the present disclosure, where the display brightness adjusting apparatus may be a chip or a system on a chip in an electronic device, and may also be a functional module in the electronic device for implementing the method according to any embodiment of the present disclosure. The display brightness adjusting device can realize functions executed by the electronic equipment in any embodiment of the disclosure, and the functions can be realized by executing corresponding software through hardware. The hardware or software comprises one or more modules corresponding to the functions. Fig. 5 is a schematic diagram of a display brightness adjusting apparatus according to an embodiment of the disclosure, and referring to fig. 5, the display brightness adjusting apparatus 500 includes: an obtaining unit 501, configured to obtain a first light leakage characteristic value of a display screen within a preset duration and a detection value of ambient light when a brightness level of the display screen reaches a preset brightness level, where the preset brightness level corresponds to a critical brightness interval of the display screen before a dimming mode is switched; a determining unit 502, configured to determine a second light leakage characteristic value according to a first light leakage characteristic value, where a fluctuation degree of the first light leakage characteristic value is greater than a fluctuation degree of the second light leakage characteristic value; determining a light leakage predicted value of the display screen according to the second light leakage characteristic value; and determining an illumination value of the ambient light according to the light leakage predicted value and the detection value of the ambient light, wherein the illumination value of the ambient light is used for adjusting the brightness of the display screen.
In the above scheme, the apparatus further includes a monitoring module, configured to monitor a brightness level of the display screen before the obtaining module obtains the first light leakage characteristic value; and determining whether the brightness level of the display screen reaches a preset brightness level.
In the above scheme, the determining unit is configured to average the first light leakage characteristic value, and determine the average as the second light leakage characteristic value; or, the maximum value and/or the minimum value in the first light leakage characteristic value are/is removed, and the average value of the removed first light leakage characteristic value is determined as the second light leakage characteristic value.
In the above scheme, the determining unit is configured to generate a first fluctuation curve corresponding to a first light leakage characteristic value; matching the first fluctuation curve with a plurality of second fluctuation curves, wherein the second fluctuation curves are obtained by training according to light leakage characteristic values of a display screen when different display contents are displayed and light leakage illumination values of a display; and determining a first light leakage characteristic value corresponding to a third fluctuation curve as a second light leakage characteristic value, wherein the third fluctuation curve is a fluctuation curve matched with the first fluctuation curve in the plurality of second fluctuation curves.
In the above scheme, the determining unit is further configured to correct the second light leakage characteristic value using the attenuation coefficient after determining the second light leakage characteristic value.
In the above scheme, the determining unit is further configured to obtain a brightness value of the ambient light by subtracting the detected value of the ambient light from the predicted value of the light leakage; and determining the illumination value of the ambient light according to the brightness value of the ambient light and the illumination calculation coefficient.
According to a third aspect of an embodiment of the present disclosure, there is provided an electronic apparatus including: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to: when the executable instructions are executed, the method for adjusting the display brightness in any embodiment of the disclosure is realized.
In the above scheme, the electronic device further includes: a light sensor coupled to the processor; and the light sensor is used for detecting the detection value of the ambient light.
According to a fourth aspect of the embodiments of the present disclosure, there is provided a computer-readable storage medium storing an executable program, wherein the executable program, when executed by a processor, implements the display brightness adjustment method in any of the embodiments of the present disclosure.
Those of skill in the art will appreciate that the functions described in connection with the various illustrative logical blocks, modules, and algorithm steps described in the disclosure herein may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions described in the various illustrative logical blocks, modules, and steps may be stored on or transmitted over as one or more instructions or code on a computer-readable medium and executed by a hardware-based processing unit. The computer-readable medium may include a computer-readable storage medium, which corresponds to a tangible medium, such as a data storage medium, or any communication medium including a medium that facilitates transfer of a computer program from one place to another (e.g., according to a communication protocol). In this manner, a computer-readable medium may generally correspond to (1) a tangible computer-readable storage medium that is not transitory, or (2) a communication medium, such as a signal or carrier wave. A data storage medium may be any available medium that can be accessed by one or more computers or one or more processors to retrieve instructions, code and/or data structures for implementing the techniques described in this disclosure. The computer program product may include a computer-readable medium.
By way of example, and not limitation, such computer-readable storage media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, flash memory, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer-readable medium. For example, if the instructions are transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. It should be understood, however, that the computer-readable storage media and data storage media do not include connections, carrier waves, signals, or other transitory media, but are instead directed to non-transitory tangible storage media. Disk and disc, as used herein, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
The instructions may be executed by one or more processors, such as one or more Digital Signal Processors (DSPs), general purpose microprocessors, Application Specific Integrated Circuits (ASICs), field programmable logic arrays (FPGAs), or other equivalent integrated or discrete logic circuitry. Accordingly, the term "processor," as used herein may refer to any of the foregoing structure or any other structure suitable for implementation of the techniques described herein. Additionally, in some aspects, the functions described by the various illustrative logical blocks, modules, and steps described herein may be provided within dedicated hardware and/or software modules configured for encoding and decoding, or incorporated in a combined codec. Also, the techniques may be fully implemented in one or more circuits or logic elements.
The techniques of this disclosure may be implemented in a variety of described devices or apparatuses, including a wireless handset, an Integrated Circuit (IC), or a set of ICs (e.g., a chipset). Various components, modules, or units are described in this disclosure to emphasize functional aspects of means for performing the disclosed techniques, but do not necessarily require realization by different hardware units. Indeed, as described above, the various units may be combined in a codec hardware unit, in conjunction with suitable software and/or firmware, or provided by an interoperating hardware unit (including one or more processors as described above).
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above description is only an exemplary embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.
Claims (15)
1. A display brightness adjustment method is characterized by comprising the following steps:
when the brightness level of a display screen reaches a preset brightness level, obtaining a first light leakage characteristic value of the display screen within a preset time and a detection value of ambient light, wherein the preset brightness level corresponds to a critical brightness interval of the display screen before a dimming mode is switched;
determining a second light leakage characteristic value according to the first light leakage characteristic value, wherein the fluctuation degree of the first light leakage characteristic value is greater than that of the second light leakage characteristic value;
determining a light leakage predicted value of the display screen according to the second light leakage characteristic value;
and determining an illumination value of the ambient light according to the light leakage predicted value and a detection value of the ambient light, wherein the illumination value of the ambient light is used for adjusting the brightness of the display screen.
2. The method according to claim 1, wherein before the obtaining the first light leakage characteristic value of the display screen within a preset time period, the method further comprises:
monitoring the brightness level of the display screen;
and determining whether the brightness level of the display screen reaches the preset brightness level.
3. A method as claimed in claim 1 or 2, wherein determining a second light leakage characteristic value from the first light leakage characteristic value comprises:
averaging the first light leakage characteristic values, and determining the average value as the second light leakage characteristic value; or the like, or a combination thereof,
and eliminating the maximum value and/or the minimum value in the first light leakage characteristic values, and determining the average value of the eliminated first light leakage characteristic values as the second light leakage characteristic value.
4. A method as claimed in claim 1 or 2, wherein determining a second light leakage characteristic value from the first light leakage characteristic value comprises:
generating a first fluctuation curve corresponding to the first light leakage characteristic value;
matching the first fluctuation curve with a plurality of second fluctuation curves, wherein the second fluctuation curves are obtained by training according to light leakage characteristic values of the display screen when different display contents are displayed and light leakage illumination values of the display;
and determining the first light leakage characteristic value corresponding to a third fluctuation curve as the second light leakage characteristic value, wherein the third fluctuation curve is a fluctuation curve matched with the first fluctuation curve in the plurality of second fluctuation curves.
5. A method as claimed in claim 1 or 2, wherein after the determining a second light leakage characteristic value from the first light leakage characteristic value, the method further comprises:
and correcting the second light leakage characteristic value by using an attenuation coefficient.
6. The method of claim 1, wherein determining the illumination value of the ambient light based on the leak light prediction value and a detected value of the ambient light comprises:
obtaining the brightness value of the environment light by making a difference between the detection value of the environment light and the light leakage prediction value;
and determining the illumination value of the environment light according to the brightness value of the environment light and the illumination calculation coefficient.
7. A display luminance adjustment apparatus, comprising:
the device comprises an obtaining unit, a processing unit and a control unit, wherein the obtaining unit is used for obtaining a first light leakage characteristic value of a display screen within a preset time length and a detection value of ambient light when the brightness level of the display screen reaches a preset brightness level, and the preset brightness level corresponds to a critical brightness interval of the display screen before a dimming mode is switched;
the determining unit is used for determining a second light leakage characteristic value according to the first light leakage characteristic value, and the fluctuation degree of the first light leakage characteristic value is greater than that of the second light leakage characteristic value; determining a light leakage predicted value of the display screen according to the second light leakage characteristic value; and determining an illumination value of the ambient light according to the light leakage predicted value and a detection value of the ambient light, wherein the illumination value of the ambient light is used for adjusting the brightness of the display screen.
8. The apparatus of claim 7, further comprising a monitor module configured to monitor a brightness level of the display screen before the obtaining module obtains the first leak characteristic value; and determining whether the brightness level of the display screen reaches the preset brightness level.
9. The apparatus of claim 7 or 8, wherein the determining unit is configured to average the first light leakage characteristic value and determine the average as the second light leakage characteristic value; or, the maximum value and/or the minimum value in the first light leakage characteristic values are/is removed, and the average value of the removed first light leakage characteristic values is determined as the second light leakage characteristic value.
10. The apparatus according to claim 7 or 8, wherein the determining unit is configured to generate a first fluctuation curve corresponding to the first light leakage characteristic value; matching the first fluctuation curve with a plurality of second fluctuation curves, wherein the second fluctuation curves are obtained by training according to light leakage characteristic values of the display screen when different display contents are displayed and light leakage illumination values of the display; and determining the first light leakage characteristic value corresponding to a third fluctuation curve as the second light leakage characteristic value, wherein the third fluctuation curve is a fluctuation curve matched with the first fluctuation curve in the plurality of second fluctuation curves.
11. The apparatus of claim 7 or 8, wherein the determining unit is further configured to correct the second light leakage characteristic value using an attenuation factor after determining the second light leakage characteristic value.
12. The apparatus according to claim 7, wherein the determining unit is further configured to obtain a brightness value of the ambient light by subtracting the detected value of the ambient light from the leakage light predicted value; and determining the illumination value of the environment light according to the brightness value of the environment light and the illumination calculation coefficient.
13. An electronic device, comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to: when the executable instruction is executed, the display brightness adjusting method of any one of claims 1 to 6 is realized.
14. The electronic device of claim 13, further comprising: a light sensor coupled to the processor; the light sensor is used for detecting the detection value of the ambient light.
15. A computer-readable storage medium storing an executable program, wherein the executable program when executed by a processor implements the display brightness adjustment method of any one of claims 1 to 6.
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| CN117558254A (en) * | 2024-01-11 | 2024-02-13 | 宁波赛宝信息产业技术研究院有限公司 | Display screen brightness adjusting method, system, equipment and storage medium |
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| CN117558254A (en) * | 2024-01-11 | 2024-02-13 | 宁波赛宝信息产业技术研究院有限公司 | Display screen brightness adjusting method, system, equipment and storage medium |
| CN117558254B (en) * | 2024-01-11 | 2024-04-26 | 宁波赛宝信息产业技术研究院有限公司 | Display screen brightness adjusting method, system, equipment and storage medium |
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