CN111816116A - Display parameter acquisition, display control parameter determination method, device and storage medium - Google Patents

Abstract

The present disclosure relates to a display parameter acquisition and display control parameter determination method, device and storage medium, belonging to the technical field of display. The display parameter acquisition method is applied to a display panel, the display panel includes a first display area and a second display area, the transmittance of the first display area is higher than that of the second display area, and the method includes: Obtain a first detection signal output by a photoelectric detection device when a target image is displayed in the first display area, the photoelectric detection device is arranged opposite to the first display area of the display panel, and is located on the display panel opposite to the first display area of the display panel. The opposite side of the light-emitting surface of the display panel; and the display parameters of the first display area are obtained based on the first detection signal.

Description

Display parameter acquisition, display control parameter determination method, device and storage medium

technical field

The present disclosure relates to the field of display technology, and in particular, to a method, device and storage medium for acquiring display parameters and determining display control parameters.

Background technique

With the development of mobile terminal technology, a full-screen mobile terminal has become an important development direction of the current mobile terminal.

At present, the main problem of a full-screen mobile terminal is the setting of the front camera, that is, how to solve the problem that the front camera occupies the screen. The current solutions mainly include removing the front camera, double-sided screen (the front camera is set on the back screen), retractable camera and hidden camera, etc.

Among them, the hidden camera refers to a solution that hides the camera under the display panel to achieve a full-screen setting. For example, the display panel has a high transmittance area, and the front camera is arranged under the high transmittance area. Occupies the screen and realizes a full-screen design.

SUMMARY OF THE INVENTION

The present disclosure provides a method, device and storage medium for acquiring display parameters and determining display control parameters, which are used to realize independent compensation for high transmittance regions of a display panel.

According to a first aspect of the embodiments of the present disclosure, there is provided a display parameter acquisition method, the display parameter acquisition method being applied to a display panel, the display panel including a first display area and a second display area, the first display area The transmittance is higher than the second display area, and the method includes:

Obtain a first detection signal output by a photoelectric detection device when a target image is displayed in the first display area, the photoelectric detection device is arranged opposite to the first display area of the display panel, and is located on the display panel and the the opposite side of the light-emitting surface of the display panel;

The display parameters of the first display area are obtained based on the first detection signal.

In the embodiment of the present disclosure, because in the display parameter acquisition method, the photodetection device opposite to the first display area of the display panel and located on the side of the display panel opposite to the light emitting surface of the display panel, During the display process, by detecting the display parameters of the first display area of the display panel, a reference can be provided for independent compensation (correction) of the first display area.

In an implementation manner of the embodiment of the present disclosure, the acquiring the first detection signal output by the photoelectric detection device when the target image is displayed in the first display area includes:

acquiring ambient light information, where the ambient light information is used to indicate the brightness of the ambient light;

When the brightness of the ambient light is less than a threshold value, the first detection signal output by the photodetection device is acquired.

In this implementation manner, the brightness of the ambient light where the display panel is located is determined, and when the brightness of the ambient light is less than a threshold value, the first detection signal output by the photoelectric detection device is obtained to avoid the first detection signal output by the photoelectric detection device due to excessive ambient light. The influence of the detection signal improves the acquisition accuracy of the display parameters, thereby improving the accuracy of subsequent correction of the first display area of the display panel.

In an implementation manner of the embodiment of the present disclosure, the acquiring ambient light information includes:

When each pixel of the display panel does not emit light, acquiring the second detection signal output by the photoelectric detection device;

The ambient light information is obtained based on the second detection signal.

In this implementation manner, the brightness of the ambient light is determined by detecting the second detection signal when the display panel does not emit light, which is simple and accurate.

In an implementation manner of the embodiment of the present disclosure, the acquiring the first detection signal output by the photoelectric detection device when the target image is displayed in the first display area includes:

outputting a display parameter acquisition instruction, where the display parameter acquisition instruction is used to instruct the user to place the display panel in an environment with low ambient light brightness;

After receiving the confirmation instruction from the user, acquire the first detection signal output by the photoelectric detection device.

In this implementation, the user can place the display panel in an environment with less ambient light by outputting an instruction, and at this time, the first detection signal output by the photoelectric detection device is obtained, so as to avoid the first detection signal output by the photoelectric detection device due to excessive ambient light. The effect of the detection signal.

In an implementation manner of the embodiment of the present disclosure, the obtaining the display parameter of the first display area based on the first detection signal includes:

When the brightness of the ambient light is greater than or equal to a threshold, use the second detection signal to modify the first detection signal;

Based on the corrected first detection signal, the display parameters of the first display area are obtained.

In this implementation manner, since the first detection signal contains ambient light information, and the second detection signal represents ambient light information, the ambient light information in the first detection signal can be removed by using the second detection signal , so as to obtain a first detection signal that is not affected by ambient light.

In an implementation manner of the embodiment of the present disclosure, the obtaining the display parameter of the first display area based on the first detection signal includes:

modifying the first detection signal based on the display frequency of the first display area;

Based on the corrected first detection signal, the display parameters of the first display area are obtained.

In this implementation manner, the ambient light information in the first detection signal output by the photodetection device is removed by the display frequency of the first display area, so as to obtain the first detection signal that is not affected by ambient light.

According to a second aspect of the present disclosure, there is provided a method for determining a display control parameter, the method comprising:

Obtain the display parameters of the first display area by using the method according to the first aspect;

Based on the display parameters of the first display area, the display control parameters of the first display area are determined, and the display control parameters are used to indicate the corresponding relationship between gray scales and data voltages.

According to a third aspect of the present disclosure, there is provided a display parameter acquisition device, the display parameter acquisition device is applied to a display panel, the display panel includes a first display area and a second display area, and the first display area is The transmittance is higher than the second display area, and the device includes:

an acquisition module configured to acquire a first detection signal output by a photoelectric detection device when a target image is displayed in the first display area, the photoelectric detection device is disposed opposite to the first display area of the display panel and is located in the a side of the display panel opposite to the light-emitting surface of the display panel;

The processing module is configured to obtain display parameters of the first display area based on the first detection signal.

In an implementation manner of the embodiment of the present disclosure, the obtaining module includes:

an acquisition submodule, configured to acquire ambient light information, where the ambient light information is used to indicate the brightness of the ambient light;

The first processing sub-module is configured to acquire a first detection signal output by the photoelectric detection device when the brightness of the ambient light is less than a threshold value.

In an implementation manner of the embodiment of the present disclosure, the acquisition sub-module is configured to acquire a second detection signal output by the photodetection device when each pixel of the display panel does not emit light; based on the second detection signal The detection signal obtains the ambient light information.

In an implementation manner of the embodiment of the present disclosure, the obtaining module includes:

an output submodule, configured to output a display parameter acquisition instruction, where the display parameter acquisition instruction is used to instruct the user to place the display panel in an environment with low ambient light brightness;

The first processing submodule is configured to acquire the first detection signal output by the photoelectric detection device after receiving the confirmation instruction from the user.

In an implementation manner of the embodiment of the present disclosure, the processing module includes:

a correction submodule, configured to use the second detection signal to correct the first detection signal when the brightness of the ambient light is greater than or equal to a threshold;

The second processing submodule is configured to obtain display parameters of the first display area based on the modified first detection signal.

In an implementation manner of the embodiment of the present disclosure, the processing module includes:

a correction sub-module configured to correct the first detection signal based on the display frequency of the first display area;

The second processing submodule is configured to obtain display parameters of the first display area based on the modified first detection signal.

According to a fourth aspect of the present disclosure, there is provided an apparatus for determining a display control parameter, which is applied to a display panel, the display panel includes a first display area and a second display area, and the transmittance of the first display area is higher than In the second display area, the device includes:

a processing module configured to obtain the display parameters of the first display area by using the method described in the first aspect;

The determining module is configured to determine a display control parameter of the first display area based on the display parameter of the first display area, where the display control parameter is used to indicate a corresponding relationship between gray scales and data voltages.

According to a fifth aspect of the present disclosure, there is provided a display parameter acquisition device, the display parameter acquisition device is applied to a display panel, the display panel includes a first display area and a second display area, the first display area is The transmittance is higher than the second display area, and the device includes:

processor;

memory for storing processor-executable instructions;

Wherein, the processor is configured to execute the display parameter acquisition method according to the first aspect.

According to a sixth aspect of the present disclosure, there is provided an apparatus for determining a display control parameter, which is applied to a display panel, the display panel includes a first display area and a second display area, and the transmittance of the first display area is higher than In the second display area, the device includes:

processor;

memory for storing processor-executable instructions;

Wherein, the processor is configured to execute the display control parameter determination method according to the second aspect.

According to a seventh aspect of the present disclosure, there is provided a computer-readable storage medium having computer instructions stored thereon, the computer instructions implementing the method of the first aspect or the second aspect when executed by a processor.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure.

FIG. 1 is a schematic structural diagram of a display panel according to an exemplary embodiment;

Fig. 2 is the application schematic diagram of the display panel in Fig. 1;

Fig. 3 is the hierarchical structure diagram of the display panel in Fig. 1;

4 is a flowchart of a method for obtaining a display parameter according to an exemplary embodiment;

5 is a flowchart of a method for obtaining display parameters according to an exemplary embodiment;

FIG. 6 is a fitting function curve of the brightness change of the first display area shown in an embodiment of the present disclosure;

FIG. 7 is a flowchart illustrating a method for determining a display control parameter according to an exemplary embodiment;

8 is a schematic structural diagram of an apparatus for obtaining display parameters according to an exemplary embodiment;

9 is a schematic structural diagram of an apparatus for determining a display control parameter according to an exemplary embodiment;

Fig. 10 is a block diagram of an apparatus for obtaining display parameters according to an exemplary embodiment.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as recited in the appended claims.

The organic light emitting diode (Organic Light Emitting Diode, OLED) display panel is gradually increasing its market share due to its advantages of high sensitivity, high contrast ratio, wide viewing angle, low power consumption, and thin volume.

When the OLED display panel is used as the display panel of the hidden camera solution, in order to achieve higher transmittance, the high transmittance area on the OLED display panel needs to be different from the non-high transmittance area. film material and driving method. For example, the anode and cathode materials used in the high transmittance area are transparent conductive film materials, the non-high transmittance area uses metal materials, and the transmittance of the transparent conductive film material is higher than that of the metal material; the high transmittance area uses passive materials In the driving method, the non-high transmittance region adopts the active driving method. Compared with the active driving method, the passive driving method does not need to install thin film transistors, so the transmittance is high.

Due to the difference in film material and driving method (film structure) between the high transmittance area and the non-high transmittance area, the service life of the high transmittance area is lower than that of the non-high transmittance area. Over time, the loss of the high transmittance area is higher than that of the non-high transmittance area, resulting in the non-uniform display of the high transmittance area and the non-high transmittance area.

It is worth noting that the high transmittance area mentioned above can be used to hide other components such as light sensors in addition to hiding the front camera.

At least one embodiment of the present disclosure provides a display control method, which is applied to a display panel. FIG. 1 is a schematic structural diagram of a display panel according to an exemplary embodiment. Referring to FIG. 1 , the display panel 100 includes a first display area 101 and a second display area 102 , the second display area 102 surrounds the first display area 101 , and the first display area 101 is close to one side of the second display area 102 side settings. The transmittance of the first display area 101 is higher than that of the second display area 102 , that is, the first display area 101 is the aforementioned high transmittance area, and the second display area 102 is the aforementioned non-high transmittance area. FIG. 2 is a schematic diagram of the application of the display panel in FIG. 1. Referring to FIG. 2, the display panel 100 is applied in a terminal device 10 (such as a mobile terminal). In the terminal device 10, the position corresponding to the first display area 101 can be set before components 20 such as cameras or light sensors.

FIG. 3 is a hierarchical structure diagram of the display panel 100 . Referring to FIG. 3 , the display panel 100 includes a substrate 110 , an array structure 120 on the substrate 110 (eg, a glass substrate), an organic light-emitting material layer 130 and a cathode layer 140 in sequence. Wherein, the difference in service life of the first display area 101 and the second display area 102 may be caused by at least one factor among the film layer material and the film layer structure. For example, the array structure 120 and the cathode layer 140 of the first display area 101 are made of high transmittance materials, while the array structure 120 and the cathode layer 140 of the second display area 102 are made of general transmittance materials. The service life of the transmittance material is lower than that of the general transmittance material. For another example, the array structure 120 of the second display area 102 includes a thin film transistor array and an anode connected to the thin film transistor array, that is, the second display area 102 adopts an active driving mode, and the array structure 120 of the first display area 101 Only the anode array is included, that is, the first display area adopts the passive driving mode. Due to the difference in the film structure of the two, the service life of the passive driving mode is lower than that of the active driving mode.

It should be noted that, one high transmittance area may be set on the display panel, or two or more high transmittance areas may be set.

Fig. 4 is a flow chart of a method for obtaining a display parameter according to an exemplary embodiment. Referring to FIG. 4 , the method can be performed by a display panel or a terminal device having the display panel, for example, by a driver circuit in the display panel or a controller in the terminal device, the driver circuit is usually an integrated circuit, and the controller Usually an integrated circuit or a processing chip, the display parameter acquisition method includes:

In step S11, the first detection signal output by the photoelectric detection device when the target picture is displayed in the first display area is acquired.

Wherein, the photoelectric detection device is disposed opposite to the first display area of the display panel, and is located on the side of the display panel opposite to the light emitting surface of the display panel. The light emitting surface refers to the side where the first display area and the second display area of the display panel emit light at the same time, that is, the side of the display panel disposed on the terminal device facing the outside (user). Since the first display area is a high transmittance area, the light generated by the first display area can propagate to the side opposite to the light emitting surface of the display panel. Referring to FIG. 2 , the photodetection device, ie the aforementioned component 20 , is disposed opposite to the first display area 101 of the display panel, and is located inside the terminal device, facing away from the light emitting surface of the display panel.

For example, the photodetection device may be the aforementioned front-facing camera or light sensor. Information such as brightness or chromaticity of the light generated in the first display area can be determined according to the detection signal output by the aforementioned front camera or the light sensor.

Wherein, the target picture may be a monochrome picture or a polychromatic picture obtained by driving the first display area with a data voltage of a bound point gray scale. The grayscale of the binding point is usually the grayscale stored in the drive circuit of the display panel in the Gamma curve. Although the Gamma curve corresponds to the data voltage of each grayscale, in order to reduce the space required for storage, usually only a few bindings are stored in the drive circuit. The data voltages of the dot grayscales, for example, 8 tied-point grayscales, and the data voltages of other grayscales can be calculated according to these voltages. The tie-point gray-scale voltage is also the tie-point gray-scale data voltage. Among them, the binding point refers to the key points selected in the gray scale of 0 to 255, such as 31, 63, 95, 127, 159, 191, 223, 255. According to the data of these key points, the driving circuit or the controller can calculate Arbitrary grayscale data.

In step S12, the display parameters of the first display area are obtained based on the first detection signal.

Wherein, the display parameters may include at least one of chromaticity and luminance.

The display parameters of the first display area obtained in this step S12 are used to reflect the degree of use loss of the first display area.

In the embodiment of the present disclosure, in the display parameter acquisition method, a photodetection device disposed opposite to the first display area of the display panel and located on the side of the display panel opposite to the light emitting surface of the display panel is used , to detect at least one of the chromaticity and brightness of the first display area of the display panel as a display parameter, and by detecting the display parameters of the first display area of the display panel during the display process, the first display area can be independently compensated (correction) for reference.

Moreover, in the related art, during the use of the display panel, if it is necessary to detect the chromaticity or brightness of the displayed image on the display panel, it needs to be realized by means of an external device (such as an illuminance meter, etc.), which cannot be detected in real time during the use process. Therefore, Usually, the chromaticity or brightness of the display panel during use is not used as a reference for display correction, but only parameters that can be measured by internal sensors, such as current, voltage or display duration, are used as a reference for display correction. In this application, the chromaticity and/or luminance of the display panel when displaying the picture can be obtained through the photodetection device inside the terminal device, therefore, the reference parameters that can be used for the display correction of the display panel during use are expanded.

At the same time, when the target image is displayed in the first display area, the display parameters of the first display area can accurately reflect the usage loss of the first display area. The brightness produced by the data voltage will gradually decrease. Therefore, the actual measured chromaticity and brightness can accurately reflect the usage loss. Compared with taking statistical parameters such as display time as a reference, corresponding display control parameters can be more accurately selected based on the chromaticity and brightness of the first display area, thereby improving the display effect of the display panel.

Certainly, the display parameters of the first display area obtained by the display parameter obtaining method provided by the embodiment of the present disclosure may also be used for other compensation processes.

Optionally, acquiring the first detection signal output by the photoelectric detection device when the target picture is displayed in the first display area, includes:

Obtain ambient light information, which is used to indicate the brightness of ambient light;

When the brightness of the ambient light is less than the threshold value, the first detection signal output by the photodetection device is acquired.

In this implementation manner, the brightness of the ambient light where the display panel is located is determined, and when the brightness of the ambient light is less than a threshold value, the first detection signal output by the photoelectric detection device is obtained to avoid the first detection signal output by the photoelectric detection device due to excessive ambient light. The influence of the detection signal improves the acquisition accuracy of the display parameters, thereby improving the accuracy of subsequent correction of the first display area of the display panel.

Optionally, obtain ambient light information, including:

When each pixel of the display panel does not emit light, acquiring a second detection signal output by the photodetection device;

The ambient light information is obtained based on the second detection signal.

In this implementation manner, the brightness of the ambient light is determined by detecting the second detection signal when the display panel does not emit light, which is simple and accurate.

Optionally, acquiring the first detection signal output by the photoelectric detection device when the target picture is displayed in the first display area, includes:

outputting a display parameter acquisition instruction, the display parameter acquisition instruction is used to instruct the user to place the display panel in an environment with low ambient light brightness;

After receiving the confirmation instruction from the user, obtain the first detection signal output by the photoelectric detection device.

In this implementation, the user can place the display panel in an environment with less ambient light by outputting an instruction, and at this time, the first detection signal output by the photoelectric detection device is obtained, so as to avoid the first detection signal output by the photoelectric detection device due to excessive ambient light. The effect of the detection signal.

Optionally, the acquisition of the first detection signal can also be achieved by combining the above two methods, namely: outputting a display parameter acquisition instruction; acquiring ambient light information after receiving a confirmation instruction from the user; when the brightness of the ambient light is less than a threshold value. , to obtain the first detection signal.

Optionally, obtaining display parameters of the first display area based on the first detection signal, including:

When the brightness of the ambient light is greater than or equal to the threshold, use the second detection signal to correct the first detection signal;

Based on the corrected first detection signal, display parameters of the first display area are obtained.

In this implementation manner, since the first detection signal contains ambient light information, and the second detection signal represents ambient light information, the ambient light information in the first detection signal can be removed by using the second detection signal , so as to obtain a first detection signal that is not affected by ambient light.

Optionally, obtaining display parameters of the first display area based on the first detection signal, including:

modifying the first detection signal based on the display frequency of the first display area;

Based on the corrected first detection signal, display parameters of the first display area are obtained.

In this implementation manner, the ambient light information in the first detection signal output by the photodetection device is removed by the display frequency of the first display area, so as to obtain the first detection signal that is not affected by ambient light.

It should be noted that the foregoing steps S11-S12, the foregoing optional steps, and the foregoing optional steps may be arbitrarily combined.

Fig. 5 is a flow chart of a method for acquiring display parameters according to an exemplary embodiment. Referring to FIG. 5 , the method can be performed by a display panel or a terminal device having the display panel, for example, by a driver circuit in the display panel or a controller in the terminal device, the driver circuit is usually an integrated circuit, and the controller Usually an integrated circuit or a processing chip, the display parameter acquisition method includes:

In step S21, a detection indication signal is acquired.

The detection indication signal may be generated by a drive circuit in the display panel or a controller in the terminal device.

In this embodiment of the present disclosure, the detection indication signal may be generated in the following manners:

The first is to generate periodically, for example, a detection indicator signal is generated every 30 days.

The second type is aperiodic generation, which will be described below with reference to FIG. 6 , which is a fitting function curve of the brightness change of the first display area shown in the embodiment of the present disclosure. In FIG. 6, the horizontal axis represents time, and the vertical axis represents the brightness of the first display area. The brightness of the first display area in FIG. 6 is generated under the action of the data voltage of the same gray-scale binding point. Referring to FIG. 6, the three lines Respectively represent the brightness when displaying red, green, and blue monochrome pictures. It can be seen that the brightness of any color picture gradually decreases with time. Referring to FIG. 6 , the aperiodic execution can be performed in the following manner: under the action of a data voltage of a certain grayscale bound, a detection indication signal is generated every time the brightness of a certain color drops by a fixed value. In other implementation manners, the aperiodic execution may also be performed in the following manner: under the action of a data voltage bound to a grayscale of a certain color, every time the chromaticity of a certain color drops by a fixed value, a detection indication signal is generated.

The third type is event-triggered generation, for example, when the user turns on the display correction function, a detection indication signal is generated.

In step S22, when acquiring the detection indication signal, acquire the first detection signal output by the photoelectric detection device when the target image is displayed in the first display area.

Wherein, the photoelectric detection device is disposed opposite to the first display area of the display panel, and is located on the side of the display panel opposite to the light emitting surface of the display panel.

For example, the photodetection device may be the aforementioned front-facing camera or light sensor. Information such as brightness or chromaticity of the light generated in the first display area can be determined according to the detection signal output by the aforementioned front camera or the light sensor.

In an implementation manner of the embodiment of the present disclosure, acquiring the first detection signal output by the photoelectric detection device when the target image is displayed in the first display area may include:

Obtain ambient light information, which is used to indicate the brightness of ambient light;

When the brightness of the ambient light is less than the threshold value, the first detection signal output by the photodetection device is acquired.

In this implementation manner, the brightness of the ambient light where the display panel is located is determined, and when the brightness of the ambient light is less than a threshold value, the first detection signal output by the photoelectric detection device is obtained to avoid the first detection signal output by the photoelectric detection device due to excessive ambient light. The influence of the detection signal improves the acquisition accuracy of the display parameters, thereby improving the accuracy of subsequent correction of the first display area of the display panel.

Wherein, obtaining ambient light information may include:

When each pixel of the display panel does not emit light, acquiring a second detection signal output by the photodetection device;

The ambient light information is obtained based on the second detection signal.

In this implementation manner, the brightness of the ambient light is determined by detecting the second detection signal when the display panel does not emit light, which is simple and accurate.

Among them, there are two ways for each pixel of the display panel to not emit light: first, the display panel stops displaying; second, for the display panel of the pulse width modulation (Pulse Width Modulation, PWM) modulation mode, two frames of pictures are displayed during the display process. There will be a black insertion operation in between, that is, there will be a short black screen time, and each pixel of the display panel will not emit light during this time. This method can be implemented without the user's perception, so as to avoid affecting the user's use.

In another implementation manner of the embodiment of the present disclosure, acquiring the first detection signal output by the photoelectric detection device when the target image is displayed in the first display area may include:

outputting a display parameter acquisition instruction, the display parameter acquisition instruction is used to instruct the user to place the display panel in an environment with low ambient light brightness;

After receiving the confirmation instruction from the user, obtain the first detection signal output by the photoelectric detection device.

In this implementation, the user can place the display panel in an environment with less ambient light by outputting an instruction, and at this time, the first detection signal output by the photoelectric detection device is obtained, so as to avoid the first detection signal output by the photoelectric detection device due to excessive ambient light. The effect of the detection signal.

For example, the display parameter acquisition instruction can be a pop-up window, the pop-up window contains the prompt message "Please move to a darker environment", and at the same time, a confirmation button is set on the pop-up window for the user to send a confirmation instruction.

In the embodiment of the present disclosure, the target picture may be a monochrome picture or a polychromatic picture obtained by driving the first display area by a data voltage of a bound grayscale. Therefore, when acquiring the above-mentioned detection signal, it can be acquired when a monochrome picture is displayed in the first display area, or can be acquired when a multi-color picture is displayed in the first display area. The monochromatic picture refers to a red, green or blue picture, and the polychromatic picture refers to a pure color picture obtained by combining at least two of the three monochromatic colors, such as a white picture.

When displaying a monochrome picture, the detection signal corresponding to the grayscale of the binding point is obtained. For example, when blue light is displayed, the detection signal corresponding to the grayscale of the binding point is obtained. That is to say, the red sub-pixel and the green sub-pixel in each pixel are 0 grayscale, the blue sub-pixel is non-0 grayscale, so as to display monochrome-blue, and then acquire the detection signal. In the method of acquiring the detection signal corresponding to the grayscale of the binding point when displaying a monochrome picture, different monochrome colors can be displayed in sequence, and then the detection signal is acquired separately, for example, red, green, and blue are displayed in sequence.

The detection signal corresponding to the grayscale of the binding point is obtained when displaying a polychromatic picture. For example, when white light is displayed, the detection signal corresponding to the grayscale of the binding point is obtained. At this time, each color sub-pixel in the first display area adopts the same grayscale. to display white light, and then acquire the detection signal.

When acquiring the detection signal of the first display area, the second display area may not be displayed, so as to reduce the interference to the detection signal of the first display area.

It should be noted that, before the camera is used to collect the luminance or chromaticity information of the first display area, the method may further include: calibrating the luminance or chromaticity of the camera, and the calibration process is usually completed at the factory.

In step S23, the display parameters of the first display area are obtained based on the first detection signal.

Optionally, obtaining display parameters of the first display area based on the first detection signal, including:

When the brightness of the ambient light is greater than or equal to the threshold, use the second detection signal to correct the first detection signal;

Based on the corrected first detection signal, display parameters of the first display area are obtained.

In this implementation manner, since the first detection signal contains ambient light information, and the second detection signal represents ambient light information, the ambient light information in the first detection signal can be removed by using the second detection signal, Thus, a first detection signal that is not affected by ambient light is obtained.

For example, differential amplification is performed on the first detection signal and the second detection signal to remove ambient light information in the first detection signal.

Optionally, obtaining display parameters of the first display area based on the first detection signal, including:

modifying the first detection signal based on the display frequency of the first display area;

Based on the corrected first detection signal, display parameters of the first display area are obtained.

In this implementation, the first detection signal includes multiple frequency signal components, and the display frequency of the first display area is used to remove signal components in the first detection signal whose frequencies are different from the display frequency, and the removed signal components include the environment A signal component corresponding to the light information is obtained, thereby obtaining a first detection signal that is not affected by ambient light. This method can be implemented without the user's perception, so as to avoid affecting the user's use.

Wherein, modifying the first detection signal based on the display frequency of the first display area may include: analyzing the first detection signal to determine signal components of different frequencies included in the first detection signal; The signal component whose frequency is not equal to the display frequency of the first display area.

For example, it is known that the display frequency of the first display area is 60 Hz, then by analyzing each signal component in the first detection signal, the frequency of each signal component is determined, and then the signal component that is not 60 Hz is removed from the first detection signal, and the removed signal Ambient light information is included in the component.

The analysis of each signal component in the first detection signal may be implemented by using Fourier transform.

Wherein, the display parameters may include at least one of chromaticity and luminance.

When the photoelectric detection device is a light sensor, the first detection signal includes the detected electrical signal, and obtaining the display parameters of the first display area based on the corrected first detection signal may include: according to the correspondence between the first detection signal and the display parameter relationship to determine the display parameters of the first display area. For example, the brightness of the first display area can be determined according to the corresponding relationship between the detected electrical signal and the brightness.

When the photoelectric detection device is a camera, the first detection signal includes the XYZ channel information of the camera, and based on the corrected first detection signal, the display parameters of the first display area are obtained, which may include: using a matrix method, a polynomial method, or a table lookup method Or the neural network model method, convert the XYZ channel information collected by the camera into the RGB channel information of the display panel; calculate the display parameters of the first display area according to the RGB channel information of the display panel.

For example, the camera X Y Z channel information and the RGB channel information of the display panel have the following matrix mapping relationship, where RGB is a known parameter:

In this step, it is only necessary to convert the XYZ channel information collected by the camera into the RGB channel information of the display panel according to the matrix.

In the above steps, the polynomials, tables and neural network models in the polynomial method, the table look-up method or the neural network model method are all pre-calibrated or trained, and only need to be used directly.

Wherein, calculating the display parameters of the first display area according to the RGB channel information of the display panel refers to determining luminance or chromaticity based on the RGB channel information.

It should be noted that, when measuring with a camera or a light sensor, since the display panel is not completely transparent, the light detected by the camera or the light sensor may have a certain loss compared to the light emitted from the front of the display panel. The proportion of this loss is It has been considered in the above correspondence, algorithm or model. That is, in the above correspondence, algorithm or model, the conversion factor between the light actually emitted by the display panel and the light detected by the camera or the light sensor is compared with the difference between the light actually emitted by the display panel and the light detected from the front of the display panel. The conversion factor is large.

Fig. 7 is a flowchart showing a method for determining a display control parameter according to an exemplary embodiment. Referring to FIG. 7 , the method can be performed by a display panel or a terminal device having the display panel, for example, by a driver circuit in the display panel or a controller in the terminal device, the driver circuit is usually an integrated circuit, and the controller Usually an integrated circuit or a processing chip, the display control parameter determination method includes:

In step S31, display parameters of the first display area are acquired.

Step S31 may be implemented by the steps shown in FIG. 1 or FIG. 2 .

In step S32, the display control parameters of the first display area are determined based on the display parameters of the first display area, and the display control parameters are used to indicate the corresponding relationship between the gray scale and the data voltage.

Here, the display control parameter of the first display area is also the first display control parameter, and the first display control parameter is used to indicate the corresponding relationship between the gray scale and the first data voltage. During the display process, the display parameters of the first display area are used to determine the first display control parameters of the first display area. For example, for the picture to be displayed, the corresponding data voltage is determined according to the gray scale of each sub-pixel, and then the determined data voltage is used to control the display of each pixel.

It is assumed that the display control parameter of the second display area is the second display control parameter, and the second display control parameter is used to indicate the corresponding relationship between the gray scale and the second data voltage. Since the second display area is a non-high transmittance area, its loss during use is small, so the second display control parameter can be fixed. Alternatively, the second display control parameter is also changed, but to a different extent than the first display control parameter.

The first display control parameter and the second display control parameter are used to respectively perform display control on the first display area and the second display area of the display panel. In the initial use of the display panel, the first display control parameter and the second display control parameter may be the same. That is, the first data voltage used in the first display area is the same as the second data voltage used in the second display area under the same gray scale.

As the usage time of the display panel increases, the loss degree of the first display area is greater than the second loss degree. At this time, the first data voltage is used to control the actual luminance or chromaticity ratio of the first display area generated by the second data voltage control. The actual luminance or chromaticity produced by the second display area is low. By detecting the generated actual display parameter, the corresponding display control parameter is determined as the new first display control parameter by the display parameter range to which the actual display parameter belongs. The new first display control parameter is different from the second display control parameter. In the new first display control parameter and the second display control parameter, the first data voltage used in the first display area is greater than the second data voltage used in the second display area under the same gray scale. The greater the data voltage, the greater the actually generated brightness, so that the brightness loss caused by the use loss of the first display area can be compensated.

Therefore, under the control of the first and second display control parameters, the first data voltage used in the first display area is different from the second data voltage used in the second display area under the same gray scale, and the first data voltage used in the above-mentioned first display area is different. Under the control of the data voltage and the second data voltage, the brightness difference between the first display area and the second display area is smaller than the brightness difference when the second data voltage is used to control the first display area and the second display area at the same time, so that the first display area is The display difference between the area and the second display area is reduced, and the uniformity of the display panel is improved.

Optionally, the first display control parameter is one of a plurality of Gamma curves, the plurality of Gamma curves are all stored in the drive circuit of the display panel, the plurality of Gamma curves correspond to a plurality of different stages respectively, and different stages adopt different display parameters. The range indicates that the first display control parameters are determined based on the display parameters of the first display area, including:

Based on the corresponding relationship between the display parameter range and the Gamma curve, a Gamma curve corresponding to the display parameter range in which the display parameter of the first display area is located is determined.

For example, different display stages are represented by different brightness ranges. For example, the first stage brightness ranges from A1 to A2, the second stage brightness ranges from A2 to A3, and so on, where A1, A2, and A3 gradually decrease.

In different Gamma curves, at least some of the gray scales correspond to different data voltages. The smaller the display parameter range, the larger the data voltage corresponding to the same gray scale in the corresponding Gamma curve.

Optionally, the first display control parameter is one of a plurality of display correction coefficients, and the plurality of display correction coefficients are all stored in the drive circuit of the display panel, and the plurality of display correction coefficients correspond to a plurality of different stages respectively, and different stages adopt different parameters. The display parameter range of , indicates that the first display control parameters are determined based on the display parameters of the first display area, including:

Based on the correspondence between the display parameter range and the display correction coefficient, a display correction coefficient corresponding to the display parameter range in which the display parameter of the first display area is located is determined, and the display correction coefficient is used to correct the initial Gamma curve.

This initial gamma curve is also stored in the drive circuit of the display panel. The first display area and the second display area may share one initial Gamma curve, or may use different initial Gamma curves respectively.

In this implementation, two methods are provided for determining display control parameters based on the display parameters of the first display area. One is to directly determine the Gamma curve, and the other is to adjust the Gamma curve used in the first display area. coefficient, both methods can obtain a new Gamma curve suitable for the current display panel, so as to ensure display uniformity.

FIG. 8 is a schematic structural diagram of a display parameter acquisition device according to an exemplary embodiment. The display parameter acquisition device is applied to a display panel. The display panel includes a first display area and a second display area. The rate is higher than that of the second display area. Referring to FIG. 8 , the display parameter acquisition device includes: an acquisition module 401 and a processing module 402 .

Wherein, the acquisition module 401 is configured to acquire the first detection signal output by the photoelectric detection device when the target image is displayed in the first display area, the photoelectric detection device is arranged opposite to the first display area of the display panel, and is located in the the side opposite to the light-emitting surface of the display panel;

The processing module 402 is configured to obtain display parameters of the first display area based on the first detection signal, and the display parameters may include at least one of chromaticity and brightness.

Optionally, the obtaining module 401 may include:

an acquisition sub-module 411, configured to acquire ambient light information, where the ambient light information is used to indicate the brightness of the ambient light;

The first processing sub-module 412 is configured to acquire the first detection signal output by the photodetection device when the brightness of the ambient light is less than the threshold.

Optionally, the obtaining sub-module 411 is configured to obtain the second detection signal output by the photodetection device when each pixel of the display panel does not emit light; obtain ambient light information based on the second detection signal.

Optionally, the obtaining module 411 includes:

The output sub-module 413 is configured to output a display parameter acquisition instruction, where the display parameter acquisition instruction is used to instruct the user to place the display panel in an environment where the brightness of the ambient light is low;

The first processing sub-module 412 is configured to acquire the first detection signal output by the photoelectric detection device after receiving the confirmation instruction from the user.

It is worth noting that there may be only one output sub-module 413 and acquisition sub-module 411 in general, and of course, both may exist at the same time.

Optionally, the processing module 402 includes:

The correction sub-module 421 is configured to use the second detection signal to correct the first detection signal when the brightness of the ambient light is greater than or equal to the threshold;

The second processing sub-module 422 is configured to obtain display parameters of the first display area based on the corrected first detection signal.

Optionally, the processing module 402 includes:

The correction sub-module 421 is configured to correct the first detection signal based on the display frequency of the first display area;

The second processing sub-module 522 is configured to obtain display parameters of the first display area based on the corrected first detection signal.

For the manner in which the acquisition module 401 acquires the detection signal, reference may be made to steps S21 and S22; for the manner in which the processing module 402 determines the display parameters, reference may be made to step S23, and detailed descriptions are omitted here.

9 is a schematic structural diagram of an apparatus for determining display control parameters according to an exemplary embodiment, applied to a display panel, the display panel includes a first display area and a second display area, and the transmittance of the first display area is higher than In the second display area, the display control parameter determination device includes: a processing module 501 and a determination module 502 .

The processing module 501 is configured to acquire display parameters of the first display area.

The processing module 501 may adopt the steps shown in FIG. 1 or FIG. 2 to obtain the display parameters of the first display area.

The determining module 502 is configured to determine the display control parameters of the first display area based on the display parameters of the first display area, where the display control parameters are used to indicate the corresponding relationship between the gray scale and the data voltage.

The manner in which the acquiring module 501 acquires the display parameters may refer to step S31; the manner in which the determining module 502 determines the display control parameters of the first display area may refer to step S32, and the detailed description is omitted here.

FIG. 10 is a block diagram showing a display parameter acquisition/display control parameter determination apparatus 600 according to an exemplary embodiment, and the apparatus 600 may be the aforementioned display panel or a mobile terminal having the display panel. 10 , the display parameter obtaining apparatus 600 may include one or more of the following components: a processing component 602, a memory 604, a power component 606, a multimedia component 608, an audio component 610, an input/output (I/O) interface 612, a sensor component 614 , and communication component 616 .

The processing component 602 generally controls the overall operation of the display parameter acquisition/display control parameter determination apparatus 600, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 602 may include one or more processors 620 to execute instructions to perform all or some of the steps of the methods described above. Additionally, processing component 602 may include one or more modules that facilitate interaction between processing component 602 and other components. For example, processing component 602 may include a multimedia module to facilitate interaction between multimedia component 608 and processing component 602.

The memory 604 is configured to store various types of data to support the operation of the display parameter obtaining apparatus 600 . Examples of such data include instructions for any software program or method operating on display parameter acquisition device 600, contact data, phonebook data, messages, pictures, videos, and the like. Memory 604 may be implemented by any type of volatile or nonvolatile storage device or combination thereof, such as static random access memory (SRAM), electrically erasable programmable read only memory (EEPROM), erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Magnetic or Optical Disk.

Power component 606 provides power to various components of display parameter acquisition device 600 . Power components 606 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to display parameter acquisition device 600 .

The multimedia component 608 includes a screen that provides an output interface between the display parameter acquisition device 600 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touch, swipe, and gestures on the touch panel. A touch sensor can sense not only the boundaries of a touch or swipe action, but also the duration and pressure associated with the touch or swipe action.

Audio component 610 is configured to output and/or input audio signals. In some embodiments, audio component 610 includes a speaker for outputting audio signals.

The I/O interface 612 provides an interface between the processing component 602 and a peripheral interface module, which may be a keyboard, a click wheel, a button, or the like. These buttons may include, but are not limited to: home button, volume buttons, start button, and lock button.

Sensor assembly 614 includes one or more sensors for providing status assessment of various aspects of display parameter acquisition device 600 . For example, when the smart device is a smart air conditioner, the sensor component 614 may include a humidity sensor, a temperature sensor, and the like.

Communication component 616 is configured to facilitate wireless communication between display parameter acquisition apparatus 600 and other devices. In this embodiment of the present disclosure, the communication component 616 can access a wireless network based on a communication standard, such as 2G, 3G, 4G, or 5G, or a combination thereof, thereby implementing physical downlink control signaling detection. In one exemplary embodiment, the communication component 616 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. Optionally, the communication component 616 also includes an NFC module.

In an exemplary embodiment, the display parameter obtaining apparatus 600 may be implemented by one or more software application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), A field programmable gate array (FPGA), a controller, a microcontroller, a microprocessor or other electronic components are implemented to execute the above display parameter acquisition/display control parameter determination method.

In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions, such as a memory 604 including instructions, is also provided, and the instructions can be executed by the processor 620 of the display parameter obtaining apparatus 600 to execute the display parameter obtaining method. For example, the non-transitory computer-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like.

Other embodiments of the present disclosure will readily suggest themselves to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or techniques in the technical field not disclosed by the present disclosure . The specification and examples are to be regarded as exemplary only, with the 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 structures described above and illustrated in the accompanying drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (17)

1. A display parameter acquisition method, characterized in that it is applied to a display panel, the display panel includes a first display area and a second display area, and the transmittance of the first display area is higher than the second display area area, the method includes: Obtain a first detection signal output by a photoelectric detection device when a target image is displayed in the first display area, the photoelectric detection device is arranged opposite to the first display area of the display panel, and is located on the display panel and the the opposite side of the light-emitting surface of the display panel; The display parameters of the first display area are obtained based on the first detection signal. 2 . The method according to claim 1 , wherein the acquiring the first detection signal output by the photoelectric detection device when the target image is displayed in the first display area comprises: 2 . acquiring ambient light information, where the ambient light information is used to indicate the brightness of the ambient light; When the brightness of the ambient light is less than a threshold value, the first detection signal output by the photodetection device is acquired. 3. The method according to claim 2, wherein the acquiring ambient light information comprises: When each pixel of the display panel does not emit light, acquiring the second detection signal output by the photoelectric detection device; The ambient light information is obtained based on the second detection signal. 4. The method according to claim 1, wherein the acquiring the first detection signal output by the photoelectric detection device when the target image is displayed in the first display area, comprises: outputting a display parameter acquisition instruction, where the display parameter acquisition instruction is used to instruct the user to place the display panel in an environment with low ambient light brightness; After receiving the confirmation instruction from the user, acquire the first detection signal output by the photoelectric detection device. 5. The method according to claim 3, wherein the obtaining the display parameters of the first display area based on the first detection signal comprises: When the brightness of the ambient light is greater than or equal to a threshold, use the second detection signal to modify the first detection signal; Based on the corrected first detection signal, the display parameters of the first display area are obtained. 6. The method according to claim 1, wherein the obtaining the display parameters of the first display area based on the first detection signal comprises: modifying the first detection signal based on the display frequency of the first display area; Based on the corrected first detection signal, the display parameters of the first display area are obtained. 7. A method for determining display control parameters, wherein the method comprises: Use the method according to any one of claims 1 to 6 to obtain the display parameters of the first display area; Based on the display parameters of the first display area, the display control parameters of the first display area are determined, and the display control parameters are used to indicate the corresponding relationship between gray scales and data voltages. 8. A display parameter acquisition device, characterized in that it is applied to a display panel, wherein the display panel comprises a first display area and a second display area, and the transmittance of the first display area is higher than that of the second display area area, the device includes: an acquisition module configured to acquire a first detection signal output by a photoelectric detection device when a target image is displayed in the first display area, the photoelectric detection device is disposed opposite to the first display area of the display panel and is located in the a side of the display panel opposite to the light-emitting surface of the display panel; The processing module is configured to obtain display parameters of the first display area based on the first detection signal. 9. The apparatus according to claim 8, wherein the acquisition module comprises: an acquisition submodule, configured to acquire ambient light information, where the ambient light information is used to indicate the brightness of the ambient light; The first processing sub-module is configured to acquire a first detection signal output by the photoelectric detection device when the brightness of the ambient light is less than a threshold value. 10 . The apparatus according to claim 9 , wherein the obtaining sub-module is configured to obtain the second detection signal output by the photoelectric detection device when each pixel of the display panel does not emit light; based on the obtained The ambient light information is obtained from the second detection signal. 11. The device according to claim 8, wherein the acquiring module comprises: an output submodule, configured to output a display parameter acquisition instruction, where the display parameter acquisition instruction is used to instruct the user to place the display panel in an environment with low ambient light brightness; The first processing submodule is configured to acquire the first detection signal output by the photoelectric detection device after receiving the confirmation instruction from the user. 12. The apparatus according to claim 10, wherein the processing module comprises: a correction sub-module, configured to use the second detection signal to correct the first detection signal when the brightness of the ambient light is greater than or equal to a threshold; The second processing submodule is configured to obtain display parameters of the first display area based on the modified first detection signal. 13. The apparatus according to claim 8, wherein the processing module comprises: a correction sub-module configured to correct the first detection signal based on the display frequency of the first display area; The second processing submodule is configured to obtain display parameters of the first display area based on the modified first detection signal. 14. A display control parameter determination device, characterized in that it is applied to a display panel, the display panel comprises a first display area and a second display area, and the transmittance of the first display area is higher than that of the second display area. display area, the device includes: a processing module, configured to obtain the display parameters of the first display area by using the method according to any one of claims 1 to 6; The determining module is configured to determine, based on the display parameters of the first display area, display control parameters of the first display area, where the display control parameters are used to indicate a corresponding relationship between gray scales and data voltages. 15. A display parameter acquisition device, characterized in that it is applied to a display panel, the display panel comprises a first display area and a second display area, and the transmittance of the first display area is higher than that of the second display area area, the device includes: processor; memory for storing processor-executable instructions; Wherein, the processor is configured to execute the display parameter acquisition method according to any one of claims 1 to 6. 16. A display control parameter determination device, characterized in that it is applied to a display panel, the display panel comprises a first display area and a second display area, and the transmittance of the first display area is higher than that of the second display area. display area, the device includes: processor; memory for storing processor-executable instructions; Wherein, the processor is configured to execute the display control parameter determination method of claim 7 . 17. A computer-readable storage medium on which computer instructions are stored, wherein when the computer instructions are executed by a processor, the method of any one of claims 1 to 6 is implemented, or the method of claim 7 is implemented. method described.

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