CN117198193A

CN117198193A - Screen brightness adjusting method, device, equipment and medium

Info

Publication number: CN117198193A
Application number: CN202311244487.3A
Authority: CN
Inventors: 唐伟; 王佳丽; 彭博; 李雅君; 黄建邦
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Priority date: 2023-09-25
Filing date: 2023-09-25
Publication date: 2023-12-08

Abstract

The disclosure provides a method, a device, equipment and a medium for adjusting screen brightness, which belong to the technical field of display and aim to improve the accuracy of adjusting the screen brightness, wherein the method comprises the following steps: acquiring a first inclination angle of a first display screen at the current moment and a first ambient light brightness perceived by the first display screen under the first inclination angle; then, based on the first inclination angle, obtaining a compensation brightness value for compensating the first ambient light brightness; then, determining a compensation voltage based on the first ambient light level and the compensation luminance value; and compensating the driving voltage of the pixels in the first display screen based on the compensation voltage to adjust the screen brightness of the first display screen.

Description

Screen brightness adjusting method, device, equipment and medium

Technical Field

The disclosure relates to the technical field of display, and in particular relates to a method, a device, equipment and a medium for adjusting screen brightness.

Background

With the development of display technology, various types of display devices have appeared, wherein the screen brightness of the display devices is related to the display quality of the display devices. In the related art, in order to ensure that the display device has screen brightness that is comfortable for a viewer under different environmental conditions, a sensor is implanted in the display device to sense the brightness of ambient light, so that the screen brightness is adjusted according to the sensed brightness of ambient light.

However, the accuracy of the adjustment of the brightness of the screen based on the ambient light is still to be improved, and further improvement of the display effect is still required.

Disclosure of Invention

Based on the content of the background technology, the disclosure provides a screen brightness adjusting method, device, equipment and medium.

In a first aspect of the present disclosure, there is provided a screen brightness adjustment method, the method including:

acquiring a first inclination angle of a first display screen at the current moment and a first ambient light brightness perceived by the first display screen under the first inclination angle;

acquiring a compensation brightness value for compensating the first ambient light brightness based on the first inclination angle;

determining a compensation voltage based on the first ambient light level and the compensation luminance value;

and compensating the driving voltage of the pixels in the first display screen based on the compensation voltage so as to adjust the screen brightness of the first display screen.

Illustratively, the method further comprises:

constructing a brightness difference relation, wherein the brightness difference relation is used for representing the difference of the environmental light brightness perceived by the first display screen and the second display screen under the same inclination angle; wherein the view angle of the ambient light sensor in the second display screen is greater than the view angle of the ambient light sensor in the first display screen;

The obtaining, based on the first inclination angle, a compensation luminance value for compensating the first ambient light luminance includes:

substituting the first inclination angle into the brightness difference relation to obtain the compensation brightness value.

Illustratively, the constructing the brightness difference relationship includes:

collecting second ambient light brightness perceived by the first display screen under a plurality of second inclination angles and third ambient light brightness perceived by the second display screen under a plurality of second inclination angles under the same illumination condition;

constructing a first relationship function according to the plurality of second inclination angles and the second ambient light brightness, and constructing a second relationship function according to the plurality of second inclination angles and the third ambient light brightness;

and constructing the brightness difference relation based on the first relation function and the second relation function.

Illustratively, said constructing a first relationship function from a plurality of said second tilt angles and said second ambient light levels comprises:

obtaining a plurality of groups of data by taking one second inclination angle and second ambient light brightness corresponding to the second inclination angle as one group of data;

Constructing a polynomial function based on a plurality of groups of data, wherein the polynomial function is used for representing the relation between the ambient light brightness and the inclination angle;

and solving the polynomial function to obtain the first relation function.

Illustratively, the acquiring the second ambient light level perceived by the first display screen under the same lighting condition at a plurality of second inclination angles, and the third ambient light level perceived by the second display screen under the plurality of second inclination angles includes:

two light sources are respectively adopted as the light sources of the first display screen and the second display screen;

configuring respective corresponding light sources for the first display screen and the second display screen;

adjusting the light-emitting brightness and/or the light source direction of the light source so that the first display screen and the second display screen are under the same illumination condition, and acquiring second ambient light brightness perceived by the first display screen at a plurality of second inclination angles and third ambient light brightness perceived by the second display screen at a plurality of second inclination angles;

the light source direction comprises the direction of the light source perpendicular to the display surface and/or the direction of the light source parallel to the display surface, and different luminous brightness corresponds to different time periods in a day.

Illustratively, a plurality of the second inclination angles are each in an angle range of 0 ° to 70 °.

Illustratively, a sequence of arithmetic differences is formed between a plurality of said second inclination angles.

Illustratively, the method further comprises a plurality of the luminance difference relationships, different luminance difference relationships corresponding to different time periods, the method further comprising:

acquiring a target time period and a light source direction of the current moment;

determining a brightness difference relationship corresponding to the target time period;

substituting the first inclination angle into a brightness difference relation corresponding to the target time period and/or the light source direction to obtain the compensation brightness value.

Illustratively, the first display screen includes a drive system that drives the pixels to emit light; the method further comprises the steps of:

storing the brightness difference relation into a read-only memory of the driving system;

reading the brightness difference relation from the read-only memory;

Writing the first inclination angle into a random access memory, and running the read brightness difference relation in the random access memory so that the brightness difference relation obtains the compensation brightness value in the running process.

Illustratively, the determining a compensation voltage based on the first ambient light level and the compensation luminance value includes:

determining a compensated ambient brightness based on the first ambient brightness and the compensated brightness value;

acquiring a compensation voltage corresponding to the compensated ambient brightness from a preset brightness compensation table; the brightness compensation table comprises compensation voltages corresponding to different ambient light brightness.

Illustratively, the compensating the driving voltage of the pixel in the first display screen based on the compensation voltage includes:

determining the polarity corresponding to the compensation voltage;

when the polarity is larger than a preset value, increasing the driving voltage according to the compensation voltage so as to improve the screen brightness;

and when the polarity is smaller than a preset value, reducing the driving voltage according to the compensation voltage so as to reduce the screen brightness.

Wherein the polarity is used to characterize a compensation direction of the compensation, which may include a direction of increasing the driving voltage and a direction of decreasing the driving voltage.

Illustratively, the first display screen is provided with an ambient light sensor, the ambient light sensor is used for sensing the first ambient light brightness, and the determining the polarity corresponding to the compensation voltage includes:

the sensing voltage sent by the ambient light sensor is obtained after the first ambient light brightness is converted into an electric signal;

gain voltage corresponding to the compensation brightness value is obtained;

based on the gain voltage, compensating the sensing voltage to obtain a compensated sensing voltage;

and determining the polarity corresponding to the compensation voltage based on the compensated sensing voltage and the current driving voltage of the pixel.

The screen brightness adjusting method provided by the disclosure can obtain the first inclination angle of the first display screen at the current moment and the first ambient light brightness perceived by the first display screen under the first inclination angle; based on the first inclination angle, obtaining a compensation brightness value for compensating the first ambient light brightness; determining a compensation voltage based on the first ambient light level and the compensation luminance value; and finally, compensating the driving voltage of the pixels in the first display screen based on the compensation voltage so as to adjust the screen brightness of the first display screen.

Because the first inclination angle of the first display screen is obtained simultaneously, and the first ambient light brightness of the first display screen under the first inclination angle is obtained, and the first ambient light brightness is compensated based on the first inclination angle, when the first display screen is inclined, the perceived ambient light brightness can be corrected according to the inclined angle, so that the perceived ambient light brightness can be more similar to the real ambient light brightness received by the first display screen under the inclined condition, and therefore, based on the first ambient light brightness and the compensation brightness value, the determined compensation voltage is more accurate, the compensation of the driving voltage is more accurate, the accuracy of the first display screen for adjusting the screen brightness according to the ambient light is improved, the adjusted screen brightness can be more suitable for the real illumination environment, the display effect is improved, and better screen watching experience is brought to a user.

The embodiment of the disclosure also discloses an electronic device, which comprises: the system comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes the screen brightness adjusting method when executing.

In an embodiment of the present disclosure, a computer-readable storage medium storing a computer program for causing a processor to execute the screen brightness adjustment method according to the present disclosure is also disclosed.

The foregoing description is merely an overview of the technical solutions of the present disclosure, and may be implemented according to the content of the specification in order to make the technical means of the present disclosure more clearly understood, and in order to make the above and other objects, features and advantages of the present disclosure more clearly understood, the following specific embodiments of the present disclosure are specifically described.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the related art, a brief description will be given below of the drawings required for the embodiments or the related technical descriptions, and it is obvious that the drawings in the following description are some embodiments of the present disclosure, and other drawings may be obtained according to the drawings without any inventive effort for a person of ordinary skill in the art. It should be noted that the scale in the drawings is merely schematic and does not represent actual scale.

FIG. 1 shows luminance normalization curves for a COE OLED screen and a POL OLED screen;

FIG. 2 shows angle versus compensation luminance graphs for COE OLED screens and POL OLED screens;

FIG. 3a shows a schematic cross-sectional view of a first display in an embodiment of the disclosure;

FIG. 3b shows a plan view of a display panel of a plate straightener in an embodiment of the disclosure;

FIG. 3c illustrates a plan view of a display panel of a folder in an embodiment of the disclosure;

FIG. 4 is a flowchart illustrating steps of a method for adjusting screen brightness according to an embodiment of the present disclosure;

FIG. 5 illustrates a schematic diagram of a location between a first display screen and a light source in an embodiment of the present disclosure;

FIG. 6 is a flowchart illustrating steps for constructing a luminance difference relationship in an embodiment of the present disclosure;

FIG. 7 illustrates a schematic diagram of data acquisition for a display screen in an embodiment of the present disclosure;

FIG. 8 illustrates a flowchart of steps for constructing a first relationship function in an embodiment of the present disclosure;

FIG. 9 is a schematic overall flow chart of a method for adjusting screen brightness of a COE OLED screen;

fig. 10 is a schematic diagram showing a frame structure of a screen brightness adjusting device according to an embodiment of the present disclosure.

Detailed Description

In order that the above-recited objects, features and advantages of the present disclosure will become more apparent, a more particular description of embodiments of the disclosure will be rendered by reference to the appended drawings, which together with the appended drawings illustrate embodiments of the disclosure, wherein it is obvious that the described embodiments are some, but not all, of the embodiments of the disclosure. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure.

With the development of display technology, an OLED (Organic Light-Emitting Diode) display device has emerged, and in turn, an OLED screen using the COE (color filter on encapsulati) technology, and an OLED screen using the POL (Polarizer) technology may be included in the OLED display device. Wherein the COE OLED screen is

The COE technology is that a black material layer corresponding to OLED sub-pixels is formed on the surface of an OLED screen, color film layers are filled between the black material layers, wherein the black material layers are used for spacing the color film layers corresponding to different color light emitting elements, the black material layers can efficiently absorb all wavelengths of ambient light, the color film layers can ensure that display light reflected by the OLED material is transmitted, and other wavelength light which does not correspond to primary colors in the ambient light can also be effectively absorbed, so that the reflection of the ambient light is prevented.

The POL technology controls the polarization direction of a specific light beam through a set polarization film. When natural light passes through the polaroid, light with the vibration direction perpendicular to the transmission axis of the polaroid is absorbed, and only polarized light with the vibration direction parallel to the transmission axis of the polaroid remains in the transmitted light, so that reflection of ambient light is prevented.

The OLED screen of the COE technology and the OLED screen of the POL technology are respectively provided with an ambient light sensor, however, as the two screens adopt different ambient light reflection prevention technologies, the film layer structures on one side of the black matrix are different, so that compared with the ambient light sensor of the POL OLED screen, the ambient light sensor of the COE OLED screen has a field angle reduced by about 50%, thereby, the ambient light brightness perceived by the ambient light sensor of the COE OLED screen is different from the ambient light brightness perceived by the ambient light sensor of the POL OLED screen, and the adjustment of the screen brightness needs to be different according to the perceived ambient light under the condition that the ambient light perceived by the two ambient light sensors is different.

The inventors found that: the ambient light received by the screen is affected by the inclination angle of the screen, such as in the same illumination environment, the ambient light received by the screen being inclined and the ambient light received without being inclined will be different, specifically, the perceived ambient light will be affected by the inclination angle, thus, the brightness adjustment of the screen is also affected by the inclination angle. For example, the COE OLED screen and the POL OLED screen have a significant difference in screen brightness adjustment at the same tilt angle. Referring to fig. 1 and 2, fig. 1 shows luminance normalization curves of the COE OLED screen and the POL OLED screen, and fig. 2 shows angle versus compensation luminance plots of the COE OLED screen and the POL OLED screen. In fig. 1, the abscissa indicates the inclination angle, the ordinate indicates the screen brightness, the curve a is the COE OLED screen, the curve b is the POL OLED screen, and as can be seen from fig. 1, there is a certain difference in screen brightness between the COE OLED screen and the POL OLED screen. In fig. 2, the abscissa represents the inclination angle, and the ordinate represents the compensation luminance, and there is a compensation luminance difference of L2-L1 between them.

As shown in fig. 1 and 2, when the inclination angle of the screen is changed, the ambient light sensor emits different signals to make the screen perform brightness compensation. Specifically, as shown in fig. 2, current is a Curve of the compensation brightness of the cole OLED according to the inclination angle in fig. 2, target Current is a Curve of the compensation brightness of the POL OLED according to the inclination angle, and the compensation brightness of the POL OLED is higher than the compensation brightness of the cole OLED at the same inclination angle, so that the POL OLED screen is brighter than the cole OLED screen at the same inclination angle, that is, the adjustment of the screen brightness of the POL OLED screen is better, and the display effect is better.

Based on this finding, the inventors propose the following technical ideas:

the difference between the ambient light levels sensed by the POL OLED screen and the COE OLED screen at each inclination angle can be obtained, as shown in fig. 2, so that the difference between the ambient light levels sensed by the POL OLED screen and the COE OLED screen at the same inclination angle can be described, and based on the difference, the ambient light levels sensed by the COE OLED screen at different inclination angles can be corrected, so that more accurate and real ambient light levels at the inclination angles can be obtained, and based on the more real ambient light levels, accurate adjustment of the screen brightness can be achieved, for example, the brightness adjustment effect of the COE OLED screen approaches to the brightness adjustment effect of the POL OLED screen, so that the viewing experience of a user is optimized.

Of course, the above is only exemplified by the POL OLED screen and the COE OLED screen in the related art, and the inventor has found that, among various display devices, the display devices having smaller angles of view of the ambient light sensor can employ the technical ideas proposed by the inventor, and are not limited to the POL OLED screen and the COE OLED screen.

Referring to fig. 3a and fig. 4, fig. 3a illustrates a schematic cross-sectional structure of a first display screen according to the present disclosure, fig. 4 illustrates a step flow diagram of a screen brightness adjustment method according to the present disclosure, and as shown in fig. 4, as shown in fig. 3a, the first display screen may include the following film layer structure:

a substrate SUB;

a light guiding layer LL over the substrate SUB;

a buffer layer BF on the side of the light guiding layer LL facing away from the substrate SUB;

a thin film transistor TFTL and an organic light emitting layer EML are sequentially arranged on the buffer layer BF, and a plurality of sub-pixels including a red sub-pixel R, a blue sub-pixel B and a green sub-pixel G are arranged in the middle of the organic light emitting layer EML;

a thin film encapsulation layer TFEL is arranged on the organic light emitting layer EML, an FMLOC layer is arranged on the thin film encapsulation layer TFEL, a black material layer BM is arranged on the FMLOC layer, color film layers CF are arranged between the black material layers BM at intervals, the colors of the color film layers CF correspond to the luminous colors of the sub-pixels covered by the color film layers, a transparent photoresist OC layer is arranged on the black material layer BM, and a cover window CW is arranged above the transparent photoresist OC layer.

Wherein, the film layer below the black material layer BM is a transparent film layer, a through hole (not shown in fig. 3 a) is formed on the black material layer BM for transmitting light, and an ambient light sensor corresponding to the through hole is disposed below the substrate SUB for sensing the brightness of the ambient light transmitted through the through hole; specifically, the light guiding layer LL may focus the external ambient light entering the through hole on the ambient light sensor receiving unit under the substrate SUB.

Referring to fig. 3b and 3c, there are shown schematic structural views of two first display screens, wherein the first display screens may be a display panel of a board straightening machine or a display panel of a folding machine; as shown in fig. 3b, which is a plan view of the display panel of the board straightener, DA and NDA are a display area and a non-display area, respectively, and SA is a sensor area. A portion of the display area DA is a sensor area SA that can receive external ambient light. Fig. 3c is a plan view of the display panel of the folder, DA is the display area, and SA is the sensor area. A portion of the display area DA is a sensor area SA that can receive external ambient light.

As shown in fig. 4, the method specifically includes the following steps:

step S401: the method comprises the steps of obtaining a first inclination angle of a first display screen at the current moment and a first ambient light brightness perceived by the first display screen under the first inclination angle.

In this embodiment, a microelectromechanical gyroscope may be installed in the first display screen, where the microelectromechanical gyroscope is configured to obtain a first inclination angle, specifically, when a pose of the first display screen changes, the microelectromechanical gyroscope may respond to the change in the pose, and start to obtain the first inclination angle of the display screen at the current moment, specifically, the microelectromechanical gyroscope may calculate, through a capacitance change, an angular velocity w when the pose of the first display screen changes, and obtain the first inclination angle through θ=wt, where t is a duration from when the pose changes to when the pose changes.

The first inclination angle may be an included angle between the display surface of the first display screen and the target plane after the pose of the first display screen is changed, the target plane may be a plane opposite to the light source, referring to fig. 5, a schematic diagram of a position between the first display screen and the light source is shown, and as shown in an upper diagram in fig. 5, the display surface of the first display screen is perpendicular to a light ray in a vertical direction of the light source, where the plane where the display surface of the first display screen is located is the target plane; as shown in the lower diagram of fig. 5, when the pose of the first display screen is changed and the display surface thereof is tilted with respect to the light source, the angle between the tilted display surface and the target plane is referred to as a first tilt angle.

In practice, in natural environment, the light source is sunlight, so that the target plane can be a horizontal plane, in indoor environment, the light source can be an illuminating lamp, and the illuminating lamp is positioned on the top of the head, so that the target plane can also be a horizontal plane; of course, in some examples, the target plane may be other planes, and in particular, may be set according to actual situations.

In this embodiment, an ambient light sensor may be further disposed in the first display screen, where the ambient light sensor may be configured to sense ambient light led in through the light guiding layer LL, so as to obtain a first ambient light brightness. In one example, the ambient light sensor may convert the received light signal into a current signal that is converted into a voltage signal by a current amplifier, i.e., the first ambient light level may be characterized by the voltage signal.

The first ambient light brightness obtained by the ambient light sensor can be obtained after the pose of the first display screen is changed, so that the first ambient light brightness is prevented from being collected in the pose change process, and the accuracy of the detected ambient light brightness is improved.

Step S402: and acquiring a compensation brightness value for compensating the first ambient light brightness based on the first inclination angle.

Since the ambient light perceived by the display screen is related to the inclination angle of the display screen, for example, the ambient light perceived by some display screens at the inclination angle θ is different from the brightness of the ambient light perceived by other display screens at the inclination angle θ, the display effect of the display screens is not unified. Therefore, in this embodiment, the first ambient light level perceived by the first display screen may be corrected based on the first inclination angle, for example, the first ambient light level may be increased or decreased based on the first inclination angle, and the correction may be referred to as compensation, and the luminance value for compensating the first ambient light level may be referred to as a compensation luminance value.

In practice, a comparison table between the tilt angle and the compensation luminance may be established, and the comparison table may be stored in the first display screen, and after the first tilt angle is obtained, the compensation luminance value may be obtained by looking up the comparison table. The comparison table comprises a plurality of different inclination angles and compensation brightness values corresponding to the different inclination angles.

The compensation brightness value corresponding to each inclination angle can be obtained in advance according to experiments, such as multiple inclination experiments performed on the first display screen, in the inclination experiments, the first display screen is rotated to enable the display surface of the first display screen to form a certain angle with the target plane, then, the screen brightness of the first display screen can be collected, then, the screen brightness is manually adjusted to the optimal brightness under the current inclination angle, and the brightness compensation value for carrying out brightness compensation on the ambient light under the current inclination angle can be calculated based on the difference value between the optimal brightness and the screen brightness.

For example, if the screen brightness is manually adjusted up at the current inclination angle, the detected ambient light brightness needs to be increased, the ambient light brightness corresponding to the adjusted screen brightness can be obtained according to the existing correspondence between the ambient light brightness and the screen brightness, and then the brightness compensation value is obtained according to the difference between the ambient light brightness and the detected ambient light brightness.

Step S403: a compensation voltage is determined based on the first ambient light level and the compensation luminance value.

The first ambient light brightness can be compensated according to the brightness compensation value, so that the compensated first ambient light brightness can be obtained, and the compensation voltage for compensating the driving voltage of the pixel can be determined according to the compensated first ambient light brightness.

In which the pixel light emission requires driving of a driving voltage, as shown in fig. 3a, the driving voltage is applied to the thin film transistor TFT, and then the thin film transistor TFT forms an electric field to the organic light emitting layer EML, and the organic light emitting layer EML emits light under the effect of the electric field, thereby emitting red light, blue light and green light.

In an example, the process of obtaining the compensation voltage according to the compensated first ambient light level may also be obtained according to a corresponding relationship between the ambient light level and the screen brightness in the related art, for example, the compensated first ambient light level may be obtained, and then the target screen brightness corresponding to the compensated first ambient light level may be determined, where the screen brightness is a brightness formed by emitting light from a sub-pixel, and the light emission of the sub-pixel is related to the driving voltage of the sub-pixel, so that after the target screen brightness is determined, the target driving voltage of one sub-pixel corresponds to the target driving voltage of the sub-pixel, and the first display screen also corresponds to one current driving voltage at the current screen brightness, and then the compensation voltage may be obtained according to the difference between the target driving voltage and the current driving voltage.

Step S404: and compensating the driving voltage of the pixels in the first display screen based on the compensation voltage so as to adjust the screen brightness of the first display screen.

The magnitude of the driving voltage affects the light emission luminance of the pixel, and in general, the larger the driving voltage is, the higher the light emission luminance of the pixel is, and the smaller the driving voltage is, the lower the light emission luminance of the pixel is.

In this embodiment, the compensation voltage is determined according to the compensated first ambient light brightness, and may be used to increase the driving voltage or decrease the driving voltage, so as to adjust the screen brightness according to the illumination condition of the first display screen.

In some examples, when the first ambient light level is increased compared to the first ambient light level before the pose occurs, if the first ambient light level is tilted to lighten the ambient light or the entire ambient light level is increased, the screen brightness needs to be increased; when the first ambient light level is reduced compared to the first ambient light level before the pose occurs, if the first ambient light level is inclined to darken the ambient light or the whole ambient light level is reduced, the screen brightness needs to be reduced. Therefore, the compensation mode for the driving voltage can be determined according to the condition that the brightness of the first environment is increased or decreased compared with the situation before the pose occurs.

By adopting the technical scheme of the embodiment, the first ambient light brightness sensed by the ambient light sensor can be subjected to brightness compensation based on the first inclination angle of the first display screen, so that the compensated first ambient light brightness can approach to the real illumination condition of the first display screen under the pose, the accuracy of the sensed ambient light brightness is improved, the accuracy of the screen brightness along with the change of the illumination condition is improved, and the display effect is optimized.

In some embodiments, a brightness difference relationship between the first display screen and the second display screen may be constructed, where the brightness difference relationship may be used to describe a change rule of a perceived difference in ambient light brightness between the first display screen and the second display screen when the first display screen and the second display screen change along with the inclination angle, so after the first inclination angle is obtained, a difference between the ambient light brightness perceived by the first display screen and the ambient light brightness perceived by the second display screen at the first inclination angle may be determined according to the brightness difference relationship, so that the first ambient light brightness perceived by the first display screen may be compensated according to the difference, so that the compensated first ambient light brightness may approach the ambient light brightness perceived by the second display screen at the first inclination angle.

In specific implementation, a brightness difference relationship may be constructed, and correspondingly, when a compensation brightness value for compensating the first ambient light brightness is obtained based on the first inclination angle, the first inclination angle may be substituted into the brightness difference relationship to obtain the compensation brightness value.

The brightness difference relation is used for representing the difference of the ambient light brightness perceived by the first display screen and the second display screen under the same inclination angle, and the visual angle of the ambient light sensor in the second display screen is larger than that of the ambient light sensor in the first display screen.

In this embodiment, the view angle of the ambient light sensor in the second display screen is larger than the view angle of the ambient light sensor in the first display screen, that is, the opening area of the through hole corresponding to the ambient light sensor in the second display screen is larger than the opening area of the through hole corresponding to the ambient light sensor in the first display screen, so that the view angle of the ambient light sensor in the second display screen is larger, and the real illumination condition of the second display screen can be perceived. By way of example, the first display screen may be a COE OLED screen and the second display screen may be a POL OLED screen.

Because the brightness difference relationship is used for representing the difference of the ambient light brightness sensed by the first display screen and the second display screen under the same inclination angle, the ambient light brightness sensed by the second display screen under the first inclination angle (hereinafter referred to as reference ambient light brightness) can be obtained, the first ambient light brightness needs to be compensated to the reference ambient light brightness, and the compensation brightness value can be obtained according to the difference of the ambient light brightness corresponding to the first inclination angle and the second inclination angle.

In one example, the difference is a compensation luminance value.

For example, at the inclination angle θ, the ambient light brightness perceived by the first display screen is L3, and the ambient light brightness perceived by the second display screen is L4, and the brightness difference (L4-L3) between L4 and L3 may be used as the brightness compensation value for L3 at the inclination angle θ.

It should be noted that, the brightness difference relationship may be specifically characterized: under the same illumination condition and under the same inclination angle, the difference of the ambient light brightness perceived by the first display screen and the second display screen. That is, the construction of the luminance difference relationship needs to be based on the first display screen and the second display screen being in the same lighting condition.

In another example, the brightness difference relationship may be characterized as a relationship curve fitted to the inclination angle, where the relationship curve may be understood as a curve obtained by simulating a law of a difference between ambient light brightness perceived by the first display screen and the second display screen under the same illumination condition, and based on the relationship curve, a corresponding compensation brightness value at any first inclination angle may be obtained.

Next, how to construct the luminance difference relationship will be described.

In one example, when the brightness difference relationship is constructed, the environmental light brightness perceived by the first display screen and the second display screen under the same illumination condition can be collected first, so that the environmental light brightness perceived by the first display screen and the second display screen under multiple different illumination conditions can be obtained, multiple groups of data corresponding to the two display screens can be obtained, each group of data can comprise the inclination angle and the environmental light brightness under the inclination angle, then, the multiple groups of data of each display screen are fitted, a relationship curve of the environmental light brightness of each display screen changing along with the inclination angle is obtained, and the brightness difference relationship between the two display screens can be constructed based on the respective relationship curve of the two display screens.

In specific implementation, referring to fig. 6, a flowchart illustrating steps for constructing a brightness difference relationship in one embodiment is shown, and as shown in fig. 6, the method may specifically include the following steps:

step S601: and acquiring second ambient light brightness perceived by the first display screen under a plurality of second inclination angles and third ambient light brightness perceived by the second display screen under a plurality of second inclination angles under the same illumination condition.

The illumination condition may include illumination brightness and a light source direction, wherein, the change of the light source direction affects the ambient light received by the display screen, and the change of the illumination brightness also affects the ambient light brightness perceived by the display screen. Therefore, the first display screen and the second display screen need to collect the above data (inclination angle and ambient light level) under the same illumination condition.

The light source direction comprises a direction of the light source perpendicular to the display surface and/or a direction of the light source parallel to the display surface, and the illumination brightness can be adjusted compared with the ambient light brightness in different periods of the day. For example, the day includes four periods of morning, noon, afternoon and evening, and the ambient light intensities corresponding to the four periods are different, so that 4 kinds of illumination intensities may be set, and at each illumination intensity, the ambient light intensities of a display screen and a second display screen under the same second inclination angle are collected.

When the second ambient light brightness sensed by the first display screen at a plurality of second inclination angles and the third ambient light brightness sensed by the second display screen at a plurality of second inclination angles are collected, the first display screen and the second display screen can be adjusted to the same second inclination angle, and then the ambient light brightness sensed by the first display screen and the second display screen respectively at the second inclination angles is collected.

In an alternative example, when data of the first display screen and data of the second display screen are acquired, a light source with the same light-emitting brightness may be used as the light source of the first display screen and the second display screen, then the first display screen and the second display screen are adjusted to the same illumination condition, the first display screen and the second display screen are tilted so that the first display screen and the second display screen are at the same second tilt angle, and then the ambient light brightness acquired by the ambient light sensors of the two display screens respectively is acquired. Alternatively, the brightness of the light source may be adjusted to the same light emission brightness, and then the light source is rotated around the display screen so that a second inclination angle is formed between the display surface of the display screen and the target plane (a plane perpendicular to the light source).

Accordingly, referring to fig. 7, a schematic diagram of data collection on a display screen is shown, as shown in fig. 7, corresponding light sources may be configured for the first display screen and the second display screen, and then, the light emitting brightness and/or the light source direction of the light sources may be adjusted so that the first display screen and the second display screen are under the same illumination condition, and the second ambient light brightness perceived by the first display screen at a plurality of second inclination angles and the third ambient light brightness perceived by the second display screen at a plurality of second inclination angles are obtained.

The light source direction comprises a direction of the light source perpendicular to the display surface and/or a direction of the light source parallel to the display surface, and different light-emitting brightness corresponds to different time periods in a day.

As shown in fig. 7, H represents a horizontal direction in which the light source is parallel to the display surface, V represents a vertical direction in which the light source is perpendicular to the display surface, wherein when the light emission luminance of the light source is adjusted, one implementation may be to configure a plurality of light sources with different light emission luminance for each display screen, for example, configure 4 light sources with different light emission luminance for each display screen, thereby there are 8 light sources, the 8 light sources are divided into 4 groups according to the light emission luminance, each group has two light sources with the same light emission luminance, and the two light sources are respectively used as the light source of the first display screen and the light source of the second display screen. For example, the first display screen is configured with 4 light sources, namely light source 1, light source 2, light source 3 and light source 4, respectively, and the second display screen is configured with 4 light sources, namely light source 5, light source 6, light source 7 and light source 8, respectively; wherein the light emission luminance of the light source 1 is the same as the light emission luminance of the light source 5, and so on.

In practice, the light source direction may be adjusted to obtain the ambient light brightness perceived by the display screen (the first display screen and the second display screen) at the second tilt angle in different light source directions. Taking the first display screen as an example, the first display screen may be fixed such that the light source rotates from 0 ° to 70 ° around the first display screen in the horizontal direction H and the vertical direction V, thereby collecting the ambient light brightness perceived by the first display screen when rotating to each second inclination angle, and assuming that 8 sets of second inclination angles are acquired in each light source direction, 16 sets of data are correspondingly obtained, each set of data including the second inclination angle and the corresponding second ambient light brightness. Or, the light source may be fixed, and the first display screen may be tilted at an angle relative to the light source, for example, the direction of the light source is first a direction perpendicular to the display surface, at this time, the plane on which the display surface of the first display screen is located is referred to as a target plane, the second tilt angle is 0 °, and the first display screen may be tilted from 0 ° until the angle between the display surface of the first display screen and the initial target plane is 70 °, where the second ambient light brightness perceived by the display screen at the second different tilt angle may be obtained in the tilting process.

The process of collecting the third ambient light brightness of the second display screen under a plurality of second inclination angles is the same as the collecting process of the first display screen, and it is to be noted that if the second inclination angle of the first display screen and the second ambient light brightness are collected in a light source rotation mode, the second inclination angle of the second display screen and the third ambient light brightness are also collected in a light source rotation mode; if the second inclination angle of the first display screen and the second ambient light brightness are acquired by adopting the inclined display screen, the second inclination angle of the second display screen and the third ambient light brightness are acquired by adopting the inclined display screen.

In practice, the light-emitting brightness can be adjusted to obtain the data corresponding to the first display screen and the second display screen respectively under different light-emitting brightness. For example, when data acquisition is performed, the light source of the first display screen and the light source of the second display screen may be adjusted to be at the same light emitting brightness (or the light sources with the same light emitting brightness are all adopted), and then, second ambient light brightness perceived by the first display screen at a plurality of second inclination angles and third ambient light brightness perceived by the second display screen at a plurality of second inclination angles are acquired. When the second ambient light brightness sensed by the first display screen under a plurality of second inclination angles and the third ambient light brightness sensed by the second display screen under a plurality of second inclination angles are collected, the direction of the light source can be fixed, and the angle of the first display screen is inclined, so that data collection is realized. Or, the first display screen can be fixed unchanged, and the light source is rotated in the direction of the light source, so that data acquisition is realized.

After the collection is completed, the light-emitting brightness of the light source can be changed, for example, a light source with another light-emitting brightness is adopted), so that data collection is performed again, thus, data collected under various light-emitting brightness can be obtained, for example, 16 groups of data A of the first display screen can be obtained under high light-emitting brightness, and 16 groups of data A of the second display screen can be obtained; under the medium luminous brightness, 16 groups of data B of the first display screen and 16 groups of data B of the second display screen can be obtained; at low light emission luminance, 16 sets of data C of the first display screen and 16 sets of data C of the second display screen can be obtained.

Since different light emission luminances may correspond to different time periods of the day, for example, for a morning period, a midday period, an evening period, and an evening period. In this way, the difference of the perceived ambient light brightness of the display screen at the same inclination angle in different time periods in one day can be simulated, so that when the first ambient light brightness perceived by the first display screen is compensated according to the first inclination angle, the adaptive compensation can be performed based on the whole ambient light brightness in the time period.

In an alternative example, the plurality of second inclination angles may be located in an angle range of 0 ° to 70 °, that is, the inclination angles of the first display screen and the second display screen are changed in an angle range of 0 ° to 70 °.

Further, the plurality of second inclination angles form an arithmetic sequence, that is, the second inclination angles may be changed according to a fixed step, for example, the second inclination angles may be: 0 °, 5 °, 10 °, 15 °, etc. It should be noted that, the smaller the step length is, the more data is acquired, and the accuracy of the first relationship function and the second relationship function constructed can be improved.

Step S602: the first relation function is constructed according to the plurality of second inclination angles and the second ambient light level, and the second relation function is constructed according to the plurality of second inclination angles and the third ambient light level.

The first display screen may obtain a plurality of second inclination angles and second ambient light levels corresponding to the plurality of second inclination angles, where a relationship of the second ambient light levels changing with the second inclination angles may be constructed according to the plurality of second inclination angles and the plurality of second ambient light levels, and the relationship may be referred to as a first relationship function.

Illustratively, the first relationship function may be as shown in equation (1) below:

f ₁ (x _i )＝y _i i=1, 2, …, n formula (1);

x in formula (1) _i Characterizing the ith second inclination angle, y _i Indicating the ith second ambient light level.

Similarly, the second display screen may also obtain a plurality of second inclination angles and third ambient light levels corresponding to the plurality of second inclination angles, so that a relationship that the third ambient light levels change with the second inclination angles may be constructed, where the relationship may be referred to as a second relationship function, and the second relationship function is as shown in the following formula (2):

f ₂ (x _i )＝y _i i=1, 2, …, n formula (2).

Step S603: and constructing a brightness difference relation based on the first relation function and the second relation function.

In this embodiment, the first relationship function is used to reflect the relationship of the second ambient light brightness perceived by the first display screen along with the change of the second inclination angle, and the second relationship function is used to reflect the relationship of the third ambient light brightness perceived by the second display screen along with the change of the second inclination angle, so that a relationship curve reflecting the perceived ambient light brightness difference between the first relationship function and the second relationship function under the same inclination angle can be fitted based on the difference between the first relationship function and the second relationship function, thereby the difference curve is the brightness difference relationship.

By adopting the technical scheme of the example, the brightness difference relation can be a fitted relation curve, the relation curve can be understood as a curve obtained by simulating the law of the difference between the ambient light brightness sensed by the first display screen and the second display screen under the same illumination condition, and the corresponding compensation brightness value under any first inclination angle can be obtained based on the relation curve, so that the adjustment of the screen brightness can be suitable for any inclination angle.

In an alternative implementation manner of this example, when the first relationship function and the second relationship function are constructed, the construction may be performed based on a least square method, that is, m-degree polynomial functions may be constructed based on the obtained sets of data, and the m-degree polynomial functions may be solved, so as to obtain the first relationship function and the second relationship function, where the first relationship function and the second relationship function are the fitted relationship curves.

Specifically, referring to fig. 8, a flowchart illustrating a step of constructing a first relationship function is shown, where for a process of constructing a second relationship function, reference may be made to a construction process of the first relationship function, which is not described herein, and as shown in fig. 8, the method may specifically include the following steps:

step S801: and obtaining a plurality of groups of data by taking a second inclination angle and second ambient light brightness corresponding to the second inclination angle as one group of data.

For example, assuming the second tilt angle is x, the second ambient light level is y, and the data set is P ₁ P is then ₁ ＝{(x ₁ ，y ₁ )，(x ₂ ，y ₂ )，…，(x _n ，y _n ) }. In the embodiment, n is greater than or equal to 1 and less than or equal to 16, and n is 16 when 16 sets of data are acquired, in practice, n may be greater than 16 when more sets of data are acquired.

Step S802: constructing a polynomial function based on the plurality of sets of data; wherein the polynomial function is used to represent the relationship between ambient light level and tilt angle.

In this embodiment, a polynomial function shown in the following formula (3) can be constructed:

wherein w is _j As polynomial coefficients, the relation between x and y is expressed by m degree polynomials.

Step S803: and solving the polynomial function to obtain a first relation function.

Then, the polynomial function may be solved, so as to obtain a first relation function, and the solving process may be as follows:

wherein, according to the above formula (3), the error between the polynomial value and the true value is shown in the following formula (4):

finding a set of optimal polynomial coefficients minimizes the total error of the entire discrete point set after fitting, and thus can be translated into a sum of squares error, the sum of squares error of the entire point set being as follows equation (5):

wherein, to minimize E (w), one can work with w _k (k=0, 1, …, m) and zero, the process is detailed in the following formula (6):

the following formula (7) can be used:

written in matrix form, the following formula (8) is available

Equation (8);

the above formula is written as aw=b, and then calculated:

and->

The polynomial coefficient w can be obtained by putting the values into the above-mentioned linear equation system _j Obtaining a first relation function f ₁ (x _i ) Also, a second relationship function for the second display screen can be derived in this way.

The above solving process may be understood as linear fitting of the second inclination angles and the second ambient light brightness, and the first relation function may represent that a polynomial curve is fitted based on the two data.

In practice, since data under different luminance can be collected, for the first display screen, a first relation function f can be constructed for each luminance ₁ (x _i ) For the second display screen, a second relation function f can be constructed for each luminance ₂ (x _i )。

Accordingly, when the luminance difference relationship is constructed based on the first relationship function and the second relationship function, the luminance difference relationship may be a difference operation between the first relationship function and the second relationship function, assuming that the luminance difference relationship is T ₁ (x _i ) Wherein T is ₁ (x _i )＝f ₂ (x _i )-f ₁ (x _i ). Thus, the brightness difference relation can represent the difference of the ambient light brightness perceived by the two display screens under the same inclination angle, and when the compensation brightness value is obtained, the second inclination angle can be substituted into T ₁ (x _i ) And obtaining the compensation brightness value.

As described above, in one example, when collecting data of the first display screen and the second display screen, the lighting conditions thereof may include a light source direction and a light emitting luminance, that is, the ambient light levels perceived by the first display screen and the second display screen at the same inclination angle are collected at the same light emitting luminance and the same light source direction, wherein, since different light emitting luminances correspond to different time periods in the day, that is, the light sources may simulate lighting conditions of am, noon, afternoon and evening, thus, when compensating for the detected first ambient light level, reference may be made not only to the angle but also to the lighting environment in which the first display screen is located.

Therefore, when the brightness difference relation is constructed, the brightness difference relation corresponding to different time periods can be constructed according to the first relation function and the second relation function under different luminous brightness, such as constructing the brightness difference relation T corresponding to the illumination conditions of morning, noon, afternoon and evening respectively ₁ (x _i ) In this way, when determining the first inclination, the current moment of the first display screen can be acquiredIs set for a target period of time.

Then, when the compensation luminance value for compensating the first ambient light luminance is obtained based on the first inclination angle, a luminance difference relationship corresponding to the target time period may be determined, and the first inclination angle may be substituted into the luminance difference relationship corresponding to the target time period, to obtain the compensation luminance value.

When the brightness difference relation is constructed, the data of the first display screen and the second display screen can be acquired in different light source directions, so that the constructed brightness difference relation can comprise the constructed brightness difference relation corresponding to each light source direction.

Therefore, when the compensation brightness value is determined, the light source direction of the light source of the first display screen can be determined, and the first inclination angle is substituted into the brightness difference relation corresponding to the light source direction, so that the compensation brightness value is obtained.

When the brightness difference relation is constructed, if the light-emitting brightness is changed and the light source direction is changed, the brightness difference relation of different light source directions under the same light-emitting brightness and the brightness difference relation of different light-emitting brightnesses under the same light source direction are obtained. For example, if the light-emitting brightness corresponds to 4 periods, the light source direction corresponds to two directions, i.e., the vertical direction and the horizontal direction, then 8 first relationship functions are obtained for the first display screen, and 8 second relationship functions are also obtained for the second display screen, so as to obtain 8 brightness difference relationships.

When the compensation brightness value is determined, the light source direction of the light source of the first display screen and the target time period of the light source can be determined, then, the brightness difference relation corresponding to the light source direction and the target time period is obtained, and the first inclination angle is substituted into the corresponding brightness difference relation to obtain the compensation brightness value, so that finer screen brightness adjustment can be realized.

In yet another example, when the brightness difference relationship is obtained, the brightness difference relationship may be written into the ROM of the first display screen, where the brightness difference relationship may be the formula T ₁ (x _i ) At the time of writingThe formula can be converted into a code form and written in, when the first inclination angle is obtained, the brightness difference relation can be read from the ROM, and then the brightness difference relation is calculated based on the first inclination angle, so that the compensation brightness value is obtained.

Specifically, a driving system for driving the pixels to emit light may be included in the first display screen, and the driving system may include a read-only memory and a random access memory, wherein the read-only memory may store a brightness difference relationship, and the random access memory may operate on the brightness difference relationship based on the first inclination angle.

Specifically, when the compensation brightness value for compensating the first ambient light brightness is obtained based on the first inclination angle, the brightness difference relationship can be read from the read-only memory, the first inclination angle is written into the random access memory, and the read brightness difference relationship is operated in the random access memory, so that the compensation brightness value is obtained in the operation process of the brightness difference relationship.

Next, a description will be given of how to adjust the screen brightness of the first display screen based on the compensation brightness value.

In one example, when determining the compensation voltage based on the first ambient light level and the compensation luminance value, the compensated ambient light level may be determined based on the first ambient light level and the compensation luminance value; then, obtaining a compensation voltage corresponding to the compensated ambient brightness from a preset brightness compensation table; the brightness compensation table comprises compensation voltages corresponding to different ambient light brightness.

In this case, since the compensation luminance value is used to compensate the detected first ambient light level, it may be understood as a gain portion of the first ambient light level, as shown in fig. 1 and 2, taking the COE OLED screen and the POL OLED screen as an example, the ambient light level detected by the COE OLED screen is lower than the ambient light level detected by the POL OLED screen at the same inclination angle, and thus, when the first display screen is the COE OLED screen, the determined COE OLED screen may be understood as a gain of the first ambient light level.

The brightness compensation table may be a table obtained by experiments when the first display screen leaves the factory, and the table stores compensation voltages for compensating the driving voltages of the pixels under different ambient light brightness, so that the compensation voltages can be obtained from the brightness compensation table according to the compensated ambient brightness.

In yet another example, when the compensation voltage is obtained, the driving voltage of the pixel needs to be compensated, where the driving voltage of the pixel refers to a voltage required for driving the pixel to emit light, in a practical situation, the adjustment of the screen brightness includes turning down the screen brightness and turning up the screen brightness, in general, when the ambient light is darkened, the screen brightness needs to be turned down, and when the ambient light is darkened, the screen brightness needs to be turned up. Thus, when compensating for the driving voltage, the method comprises the steps of increasing the compensating voltage based on the driving voltage and decreasing the compensating voltage based on the driving voltage.

The driving voltage is reduced or increased, which can be determined by the polarity of the compensation voltage, and the polarity can be understood as the positive or negative of the compensation voltage.

In the implementation, when the polarity is greater than a preset value, the driving voltage can be increased according to the compensation voltage so as to improve the screen brightness; and when the polarity is smaller than the preset value, reducing the driving voltage according to the compensation voltage so as to reduce the screen brightness.

The preset value may be 0, and when the polarity is greater than 0, the preset value indicates that the ambient light brightness is changed from dark to bright along with the inclination of the display screen, and then the compensation voltage needs to be increased on the driving voltage; when the polarity is less than 0, which means that the ambient light is changed from bright to dark with the inclination of the display screen, the compensation voltage needs to be reduced in the driving voltage.

In one example, in determining the polarity of the compensation voltage, it may be determined according to a magnitude relation between the voltage of the compensated ambient brightness after compensation and the driving voltage of the pixel.

Specifically, a perceived voltage transmitted by the ambient light sensor may be acquired, and a gain voltage corresponding to the compensated luminance value may be acquired; based on the gain voltage, compensating the sensing voltage to obtain a compensated sensing voltage; the polarity of the compensation voltage is determined based on the compensated sensing voltage and the current driving voltage of the pixel. The sensing voltage is obtained after the first ambient light brightness is converted into an electric signal.

In this example, the perceived voltage is an electrical signal representation of the first ambient light level, which is obtained by converting an analog signal (the first ambient light level) into an electrical signal, and the gain voltage is obtained according to a compensation luminance value, which may be generally obtained by converting the compensation luminance value into the electrical signal according to a process of converting the first ambient light level into a voltage signal.

The first display screen may store gain voltages corresponding to different compensation brightness values, so that after the compensation brightness values are obtained, the corresponding gain voltages may be obtained from the first display screen.

The compensated sensing voltage may be the sum of the gain voltage and the sensing voltage, and thus, the compensated sensing voltage may be understood as a value obtained by converting the brightness of the compensated environment into an electrical signal, that is, the compensated sensing voltage corresponds to the brightness of the compensated environment.

The current driving voltage of the pixel corresponds to the current brightness of a pixel, that is, the current screen brightness of the first display screen, specifically, the magnitude between the front driving voltage and the compensated sensing voltage can be compared, so that the brightness between the compensated ambient light brightness and the current screen brightness is compared, and in general, the screen brightness is higher than the ambient light brightness to realize normal display.

If the compensated perceived voltage is greater than the current driving voltage, the polarity is positive, which means that the current screen brightness is less than the compensated ambient light brightness, the screen brightness needs to be improved, and the compensation voltage needs to be increased on the basis of the driving voltage;

if the current screen brightness is greater than the compensated ambient light brightness, the polarity is negative, which means that the current screen brightness is greater than the compensated ambient light brightness, so that the screen brightness can be properly reduced, and the compensation voltage needs to be reduced on the basis of the driving voltage.

Of course, such examples are merely illustrative, and do not represent specific limitation of the disclosure, in practice, when determining the polarity corresponding to the compensation voltage, the examples described in the foregoing embodiments may be adopted, if the compensated first ambient light level is obtained, the target screen brightness corresponding to the compensated first ambient light level may be determined, the target driving voltage corresponding to the target screen brightness may be determined, and the current driving voltage may be determined, the magnitude relation between the target driving voltage and the current driving voltage may be compared, if the target driving voltage is greater than the current driving voltage, the polarity is positive, and the compensation voltage needs to be increased based on the driving voltage if the screen brightness needs to be increased; if the target driving voltage is smaller than the current driving voltage, the polarity is negative, and the screen brightness needs to be properly reduced, and the compensation voltage is reduced on the basis of the driving voltage.

In the following, taking a COE OLED screen and a POL OLED screen as an example, an exemplary description is given of the above-mentioned screen brightness adjustment method of the present disclosure, referring to fig. 9, which shows an overall flowchart of the screen brightness adjustment method of the COE OLED screen, where a cross-sectional structure of the COE OLED screen is shown in fig. 3a, and as shown in fig. 9:

S1, a micro-electromechanical gyroscope of a COE OLED screen can calculate the current angular velocity w through capacitance change, and the current angular velocity w is output to a driving system, specifically to a RAM in the driving system after a first inclination angle is obtained through θ=wt;

the ambient light sensor of the COE OLED screen converts the received light signal into a current signal, the current signal is converted into a voltage signal through a current amplifier and amplified through a low-pass filter to obtain data reflecting the first ambient light brightness, the data can comprise the first ambient light brightness and the perceived voltage of the first ambient light brightness after being converted into the voltage signal, and the data is output to a driving system and is specifically input to a RAM in the driving system;

s2, the driving system reads a brightness difference relation stored in an external memory ROM, the brightness difference relation is stored in the ROM in a form of a program code, and meanwhile, the program is taken into a random access memory RAM to run, so that a compensation brightness value of a first inclination angle is obtained;

and compensating the first ambient light brightness based on the compensation brightness value according to the corresponding operation to obtain a compensated ambient brightness value; meanwhile, the gain voltage corresponding to the compensation brightness value is obtained by looking up a table, and the gain voltage corresponding to the compensation brightness value can be obtained by converting the compensation brightness value into an electric signal;

And, calculating the gain voltage and the sensing voltage, for example, adding the gain voltage and the sensing voltage to obtain a compensated sensing voltage;

s3, a comparator in the driving system calculates the difference between the output compensated sensing voltage and the driving voltage value of the pixels in the display area of the first display screen, and the calculated voltage signal value is input to the integrated circuit;

s4, the integrated circuit judges the polarity of the voltage signal (the polarity corresponding to the compensation voltage);

if the ambient light is larger than 0, the ambient light is lightened, the driving voltage value of the pixel needs to be increased, specifically, the compensation voltage is obtained by looking up a table according to the compensated ambient brightness value, and then the compensation voltage is added on the basis of the driving voltage, so that the luminous brightness of the pixel is improved, and the screen brightness is increased;

when the ambient light is smaller than 0, the ambient light is darkened, the driving voltage value of the pixel needs to be reduced, specifically, the compensation voltage is obtained by looking up a table according to the compensated ambient brightness value, and then the compensation voltage is subtracted on the basis of the driving voltage, so that the luminous brightness of the pixel is reduced, and the screen brightness is reduced.

The screen brightness adjusting method provided by the disclosure has the following advantages:

1. The brightness compensation can be performed on the ambient light brightness sensed by the ambient light sensor based on the inclination angle of the display screen, so that the compensated ambient light brightness can approach to the real illumination condition of the display screen in the pose of the environment, the accuracy of the sensed ambient light brightness is improved, the accuracy of the screen brightness along with the change of the illumination condition is improved, and the display effect is optimized.

2. The second display screen with the larger view angle of the ambient light sensor is used as a reference, so that the difference relation between the first display screen and the second display screen in sensing the ambient light brightness is constructed, the screen brightness adjusting effect of the first display screen with the small view angle of the ambient light sensor is consistent with the screen brightness adjusting effect of the second display screen with the large view angle, and the display quality of display products with different models, such as the display quality of a COE OLED screen and a POL OLED screen, is unified.

3. As the brightness difference relation is written into the ROM as the program code, and is read into the RAM when operation is needed, the space of the station-used function RAM can be avoided, the utilization rate of the hardware performance of the display screen is improved, and the first display screen can quickly respond to the change of the ambient illumination condition.

Based on the same inventive concept, the present disclosure further provides a screen brightness adjusting device, and referring to fig. 10, a frame structure diagram of the screen brightness adjusting device is shown, and as shown in fig. 10, the screen brightness adjusting device may specifically include the following modules:

the first acquisition module is used for acquiring a first inclination angle of the first display screen at the current moment and a first ambient light brightness perceived by the first display screen under the first inclination angle;

the second acquisition module is used for acquiring a compensation brightness value for compensating the first ambient light brightness based on the first inclination angle;

a compensation voltage determination module for determining a compensation voltage based on the first ambient light level and the compensation luminance value;

and the brightness adjustment module is used for compensating the driving voltage of the pixels in the first display screen based on the compensation voltage so as to adjust the screen brightness of the first display screen.

Optionally, the apparatus further comprises:

the difference relation construction module is used for constructing a brightness difference relation, wherein the brightness difference relation is used for representing the difference of the environmental light brightness perceived by the first display screen and the second display screen under the same inclination angle; wherein the view angle of the ambient light sensor in the second display screen is greater than the view angle of the ambient light sensor in the first display screen;

The second obtaining module is specifically configured to substitute the first inclination angle into the brightness difference relationship to obtain the compensation brightness value.

Optionally, the difference relation construction module includes:

the data acquisition unit is used for acquiring second ambient light brightness perceived by the first display screen under a plurality of second inclination angles and third ambient light brightness perceived by the second display screen under a plurality of second inclination angles under the same illumination condition;

a relation function construction unit, configured to construct a first relation function according to a plurality of the second inclination angles and the second ambient light levels, and construct a second relation function according to a plurality of the second inclination angles and the third ambient light levels;

and the difference relation construction unit is used for constructing the brightness difference relation based on the first relation function and the second relation function.

Optionally, the relationship function construction unit includes:

a data grouping subunit, configured to obtain a plurality of groups of data by using one of the second inclination angles and a second ambient light level corresponding to the second inclination angle as a group of data;

the function construction unit is used for carrying out data fitting on the basis of multiple groups of data to construct a polynomial function, and the polynomial function is used for representing the relation between the ambient light brightness and the inclination angle;

And the function solving subunit is used for solving the polynomial function to obtain the first relation function.

Optionally, the data acquisition unit is specifically configured to perform the following steps:

Optionally, the plurality of second inclination angles are all in an angle range of 0 ° to 70 °.

Optionally, a sequence of arithmetic differences is formed between a plurality of said second inclination angles.

Optionally, the device includes a plurality of the brightness difference relationships, different brightness difference relationships correspond to different time periods, and the device further includes:

The information determining module is used for acquiring the target time period and the light source direction of the current moment;

the second obtaining module is specifically configured to:

substituting the first inclination angle into the brightness difference relation corresponding to the target time period and/or the light source direction to obtain the compensation brightness value.

Optionally, the first display screen includes a driving system for driving the pixels to emit light; the apparatus further comprises:

a storage unit for storing the brightness difference relationship in a read-only memory of the driving system;

the second obtaining module is specifically configured to: reading the brightness difference relation from the read-only memory; and writing the first inclination angle into a random access memory, and running the read brightness difference relation in the random access memory so that the brightness difference relation obtains the compensation brightness value in the running process.

Optionally, the compensation voltage determining module includes:

a brightness compensation unit for determining a compensated ambient brightness based on the first ambient brightness and the compensated brightness value;

The voltage compensation unit is used for acquiring compensation voltage corresponding to the compensated ambient brightness from a preset brightness compensation table; the brightness compensation table comprises compensation voltages corresponding to different ambient light brightness.

Optionally, the brightness adjustment module is specifically configured to perform the following steps:

determining the polarity corresponding to the compensation voltage; the polarity is used to characterize the compensation direction of the compensation;

Optionally, an ambient light sensor is disposed in the first display screen, the ambient light sensor is configured to sense the first ambient light brightness, and the step of determining the polarity corresponding to the compensation voltage includes:

gain voltage corresponding to the compensation brightness value is obtained;

In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.

Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.

The above describes in detail a method, apparatus, device and medium for adjusting screen brightness provided in the present disclosure, and specific examples are applied to illustrate principles and implementations of the present disclosure, where the above description of the examples is only for helping to understand the method and core idea of the present disclosure; meanwhile, as one of ordinary skill in the art will have variations in the detailed description and the application scope in light of the ideas of the present disclosure, the present disclosure should not be construed as being limited to the above description.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any adaptations, uses, or adaptations of the disclosure following the general principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Reference herein to "one embodiment," "an embodiment," or "one or more embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. Furthermore, it is noted that the word examples "in one embodiment" herein do not necessarily all refer to the same embodiment.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the disclosure may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The disclosure may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.

Finally, it should be noted that: the above embodiments are merely for illustrating the technical solution of the present disclosure, and are not limiting thereof; although the present disclosure has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present disclosure.

Claims

1. A method for adjusting brightness of a screen, the method comprising:

2. The screen brightness adjustment method according to claim 1, characterized in that the method further comprises:

constructing a brightness difference relation; the brightness difference relation is used for representing the difference of the ambient light brightness perceived by the first display screen and the second display screen under the same inclination angle; wherein the view angle of the ambient light sensor in the second display screen is greater than the view angle of the ambient light sensor in the first display screen;

3. The screen brightness adjustment method according to claim 2, wherein the constructing the brightness difference relation includes:

4. The screen brightness adjustment method according to claim 3, wherein constructing a first relation function according to the plurality of the second inclination angles and the second ambient light brightness comprises:

constructing a polynomial function based on the plurality of groups of data, wherein the polynomial function is used for representing the relation between the ambient light brightness and the inclination angle;

and solving the polynomial function to obtain the first relation function.

5. The method of claim 3, wherein the obtaining the second ambient light level perceived by the first display screen at the plurality of second tilt angles and the third ambient light level perceived by the second display screen at the plurality of second tilt angles under the same lighting condition comprises:

6. The screen brightness adjustment method according to claim 3, wherein the plurality of second inclination angles are each in an angle range of 0 ° to 70 °.

7. A screen brightness adjustment method according to claim 3, characterized in that a sequence of arithmetic differences is formed between a plurality of the second inclination angles.

8. The screen brightness adjustment method according to claim 2, comprising a plurality of the brightness difference relationships, different brightness difference relationships corresponding to different time periods, different time periods corresponding to different ambient lighting conditions; the method further comprises the steps of:

determining a brightness difference relation corresponding to the target time period and/or the light source direction;

substituting the first inclination angle into a brightness difference relation corresponding to the target time period to obtain the compensation brightness value.

9. The screen brightness adjustment method according to claim 2, wherein the first display screen includes a driving system that drives the pixels to emit light; the method further comprises the steps of:

reading the brightness difference relation from the read-only memory;

10. The method of any one of claims 1-7, wherein the determining a compensation voltage based on the first ambient light level and the compensation luminance value comprises:

11. The method of any one of claims 1-7, wherein compensating the driving voltage of the pixels in the first display screen based on the compensation voltage comprises:

determining a polarity corresponding to the compensation voltage, wherein the polarity is used for representing a compensation direction of the compensation;

12. The method for adjusting screen brightness according to any one of claims 1 to 7, wherein an ambient light sensor is disposed in the first display screen, the ambient light sensor being configured to sense the first ambient light level, and the determining the polarity corresponding to the compensation voltage includes:

gain voltage corresponding to the compensation brightness value is obtained;

13. A screen brightness adjustment device, the device comprising:

the second acquisition module is used for acquiring a compensation brightness value for compensating the first environment brightness based on the first inclination angle;

14. An electronic device, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, which processor when executed implements the screen brightness adjustment method according to any one of claims 1-12.

15. A computer-readable storage medium, characterized in that a computer program stored thereon causes a processor to implement the screen brightness adjustment method according to any one of claims 1-12 when executed.