CN111816116B - Display parameter acquisition method, display control parameter determination method, display parameter acquisition device, display control parameter determination device and storage medium - Google Patents
Display parameter acquisition method, display control parameter determination method, display parameter acquisition device, display control parameter determination device and storage medium Download PDFInfo
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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Abstract
The disclosure relates to a display parameter obtaining method, a display parameter determining method, a display parameter obtaining device, a display control parameter determining device and a storage medium, and belongs to the technical field of display. The display parameter acquisition method is applied to a display panel, the display panel comprises 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 comprises the following steps: acquiring a first detection signal output by photoelectric detection equipment when a target picture is displayed in the first display area, wherein the photoelectric detection equipment is arranged opposite to the first display area of the display panel and is positioned on one side of the display panel opposite to the light emergent surface of the display panel; and obtaining the display parameters of the first display area based on the first detection signal.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a method and an apparatus for acquiring display parameters and determining display control parameters, and a storage medium.
Background
With the development of mobile terminal technology, a full-screen mobile terminal becomes an important direction for the development of the current mobile terminal.
At present, the main difficult problem of the full-screen mobile terminal is concentrated on the setting of the front camera, namely how to solve the problem that the front camera occupies the screen. The current solution mainly includes removing the front camera, the double-sided screen (the front camera is arranged on the back screen), the retractable camera and the hidden camera, etc.
The hidden camera is a scheme of hiding the camera below the display panel to realize full screen setting, for example, a high transmittance area is arranged on the display panel, the front camera is arranged below the high transmittance area, a screen is not occupied, and full screen design is realized.
Disclosure of Invention
The present disclosure provides a display parameter acquisition method, a display control parameter determination method, a display parameter acquisition device, a display control parameter determination device, and a storage medium, which are used to implement independent compensation for a high transmittance region of a display panel.
According to a first aspect of the embodiments of the present disclosure, there is provided a display parameter acquisition method applied to a display panel including a first display region and a second display region, the first display region having a higher transmittance than the second display region, the method including:
acquiring a first detection signal output by photoelectric detection equipment when a target picture is displayed in the first display area, wherein the photoelectric detection equipment is arranged opposite to the first display area of the display panel and is positioned on one side of the display panel opposite to the light emergent surface of the display panel;
and obtaining the display parameters of the first display area based on the first detection signal.
In the embodiment of the disclosure, in the display parameter acquiring method, by using the photodetection device which is opposite to the first display area of the display panel and located on the side of the display panel opposite to the light exit surface of the display panel, a reference can be provided for independent compensation (correction) of the first display area by detecting the display parameter of the first display area of the display panel during the display process.
In one implementation manner of the embodiment of the present disclosure, the acquiring a first detection signal output by a photoelectric detection device when the first display area displays a target picture includes:
acquiring ambient light information, wherein the ambient light information is used for indicating the brightness of ambient light;
and when the brightness of the ambient light is smaller than a threshold value, acquiring a first detection signal output by the photoelectric detection device.
In this implementation, the brightness of the ambient light where the display panel is located is determined, and when the brightness of the ambient light is smaller than the threshold, the first detection signal output by the photoelectric detection device is obtained, so that the influence of the excessive ambient light on the first detection signal output by the photoelectric detection device is avoided, the obtaining precision of the display parameters is improved, and the subsequent precision of correcting the first display area of the display panel is improved.
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 a second detection signal output by the photoelectric detection device;
obtaining the ambient light information based on the second detection signal.
In this implementation, the brightness of the ambient light is determined by detecting the second detection signal when the display panel is not emitting light, which is simple and accurate to implement.
In one implementation manner of the embodiment of the present disclosure, the acquiring a first detection signal output by a photoelectric detection device when the first display area displays a target picture includes:
outputting a display parameter acquisition instruction, wherein the display parameter acquisition instruction is used for instructing a user to place the display panel in an environment with low brightness of ambient light;
and acquiring a first detection signal output by the photoelectric detection equipment after receiving the confirmation instruction of the user.
In this implementation, through output instruction, make the user place display panel to the less environment of ambient light, obtain the first detection signal of photoelectric detection equipment output this moment, avoid the too big influence that produces to the first detection signal of photoelectric detection equipment output of 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:
when the brightness of the ambient light is greater than or equal to a threshold value, correcting the first detection signal by adopting the second detection signal;
and obtaining the display parameters of the first display area based on the corrected first detection signal.
In this implementation, since the first detection signal includes the ambient light information and the second detection signal represents the 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 the first detection signal that is not affected by the 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:
correcting the first detection signal based on the display frequency of the first display area;
and obtaining the display parameters of the first display area based on the corrected first detection signal.
In this implementation, ambient light information in the first detection signal output by the photodetection device is removed by the display frequency of the first display region, thereby obtaining the first detection signal that is not affected by ambient light.
According to a second aspect of the present disclosure, there is provided a display control parameter determination method, the method comprising:
obtaining display parameters of the first display area by using the method of the first aspect;
and determining a display control parameter of the first display area based on the display parameter of the first display area, wherein the display control parameter is used for indicating the corresponding relation between the gray scale and the data voltage.
According to a third aspect of the present disclosure, there is provided a display parameter acquisition apparatus applied to a display panel including a first display region and a second display region, the first display region having a higher transmittance than the second display region, the apparatus comprising:
the acquisition module is configured to acquire a first detection signal output by a photoelectric detection device when the first display area displays a target picture, wherein the photoelectric detection device is arranged opposite to the first display area of the display panel and is positioned on one side of the display panel opposite to the light emergent surface of the display panel;
a processing module configured to obtain a display parameter of the first display region based on the first detection signal.
In an implementation manner of the embodiment of the present disclosure, the obtaining module includes:
an acquisition sub-module configured to acquire ambient light information indicating a brightness of ambient light;
a first processing sub-module configured to acquire a first detection signal output by the photodetection device when the brightness of the ambient light is less than a threshold value.
In one implementation manner of the embodiment of the present disclosure, the obtaining sub-module is configured to obtain a second detection signal output by the photodetection device when each pixel of the display panel does not emit light; obtaining the ambient light information based on the second detection signal.
In an implementation manner of the embodiment of the present disclosure, the obtaining module includes:
the output sub-module is configured to output a display parameter acquisition instruction, and the display parameter acquisition instruction is used for instructing a user to place the display panel in an environment with low brightness of ambient light;
the first processing submodule is configured to acquire a first detection signal output by the photoelectric detection device after receiving a confirmation instruction of the user.
In an implementation manner of the embodiment of the present disclosure, the processing module includes:
a correction submodule configured to correct the first detection signal with the second 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 corrected first detection signal.
In an implementation manner of the embodiment of the present disclosure, the processing module includes:
a correction submodule configured to correct the first detection signal based on a display frequency of the first display region;
the second processing submodule is configured to obtain display parameters of the first display area based on the corrected first detection signal.
According to a fourth aspect of the present disclosure, there is provided a display control parameter determination apparatus applied to a display panel including a first display region and a second display region, the first display region having a higher transmittance than the second display region, the apparatus comprising:
a processing module configured to obtain display parameters of the first display area by using the method according to 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, wherein the display control parameter is used for indicating a corresponding relation between gray scales and data voltages.
According to a fifth aspect of the present disclosure, there is provided a display parameter acquisition apparatus applied to a display panel including a first display region and a second display region, the first display region having a higher transmittance than the second display region, the apparatus comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to perform the display parameter acquisition method according to the first aspect.
According to a sixth aspect of the present disclosure, there is provided a display control parameter determination apparatus applied to a display panel including a first display region and a second display region, the first display region having a higher transmittance than the second display region, the apparatus comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to perform 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 stored thereon computer instructions which, when executed by a processor, implement the method of the first or second aspect.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic structural diagram illustrating a display panel according to an exemplary embodiment;
FIG. 2 is a schematic diagram of an application of the display panel of FIG. 1;
FIG. 3 is a hierarchical structure diagram of the display panel of FIG. 1;
FIG. 4 is a flow diagram illustrating a display parameter acquisition method in accordance with an exemplary embodiment;
FIG. 5 is a flow diagram illustrating a display parameter acquisition method in accordance with an exemplary embodiment;
FIG. 6 is a graph of a luminance change fitting function for a first display region as shown in an embodiment of the present disclosure;
FIG. 7 is a flow diagram illustrating a display control parameter determination method according to an exemplary embodiment;
fig. 8 is a schematic structural diagram illustrating a display parameter acquisition apparatus according to an exemplary embodiment;
fig. 9 is a schematic structural diagram illustrating a display control parameter determination apparatus according to an exemplary embodiment;
fig. 10 is a block diagram illustrating a display parameter acquisition apparatus according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
An Organic Light Emitting Diode (OLED) display panel has an increasing market share due to its advantages of high sensitivity, high contrast, wide viewing angle, low power consumption, thin and Light weight, and the like.
When the OLED display panel is used as the display panel of the hidden camera scheme, in order to achieve a high transmittance in a high transmittance region on the OLED display panel, the high transmittance region needs to adopt a film material and a driving mode different from those of a non-high transmittance region. For example, the anode and cathode materials used in the high transmittance region are transparent conductive film materials, the non-high transmittance region is made of metal materials, and the transmittance of the transparent conductive film materials is higher than that of the metal materials; the high transmittance region adopts a passive driving mode, the non-high transmittance region adopts an active driving mode, and compared with the active driving mode, the passive driving mode does not need to be provided with a thin film transistor, so that the transmittance is high.
Because the film layer materials and the driving modes (film layer structures) of the high-transmittance region and the non-high-transmittance region are different, the service life of the high-transmittance region is shorter than that of the non-high-transmittance region, and the loss of the high-transmittance region is higher than that of the non-high-transmittance region when the same service time is reached, so that the high-transmittance region and the non-high-transmittance region are not uniform.
It is noted that the high transmittance region can be used to hide other components such as a light sensor (light sensor) besides the front camera.
At least one embodiment of the present disclosure provides a display control method, which applies a display panel, and 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 disposed near a side of the second display area 102. The transmittance of the first display region 101 is higher than that of the second display region 102, that is, the first display region 101 is the high transmittance region, and the second display region 102 is the non-high transmittance region. Fig. 2 is an application schematic diagram of the display panel in fig. 1, and referring to fig. 2, the display panel 100 is applied in a terminal device 10 (e.g. a mobile terminal), and a front-facing camera or an optical sensor 20 may be disposed in a position corresponding to a first display area 101 in the terminal device 10.
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 (e.g., a glass substrate), an organic light emitting material layer 130, and a cathode layer 140 in this order. Wherein the difference in the life time of the first display region 101 and the second display region 102 may be caused by at least one of a film material and a film structure. For example, the array structure 120 and the cathode layer 140 of the first display region 101 are made of a high transmittance material, and the array structure 120 and the cathode layer 140 of the second display region 102 are made of a general transmittance material, and the high transmittance material has a shorter service life than the general transmittance material. For another example, the array structure 120 of the second display region 102 includes a thin film transistor array and an anode connected to the thin film transistor array, that is, the second display region 102 adopts an active driving manner, and the array structure 120 of the first display region 101 includes only the anode array, that is, the first display region adopts a passive driving manner, so that the service life of the passive driving manner is shorter than that of the active driving manner due to the difference between the film layer structures of the two.
One high transmittance region may be provided on the display panel, or two or more high transmittance regions may be provided.
FIG. 4 is a flow diagram illustrating a display parameter acquisition method according to an example embodiment. Referring to fig. 4, the method may be performed by a display panel or a terminal device having the display panel, for example, by a driving circuit in the display panel, which is usually an integrated circuit, or a controller in the terminal device, which is usually an integrated circuit or a processing chip, and the display parameter obtaining method includes:
in step S11, a first detection signal output by the photodetection device when the target screen is displayed in the first display region is acquired.
The photoelectric detection device is arranged opposite to the first display area of the display panel and is positioned on one side of the display panel opposite to the light emergent surface of the display panel. The light emitting surface refers to a surface of the display panel from which light is emitted simultaneously from the first display area and the second display area, that is, a surface of the display panel facing outward (user) and disposed on the terminal device. Since the first display region is a high transmittance region, light generated by the first display region can be transmitted to a surface opposite to the light emergent surface of the display panel. Referring to fig. 2, the photodetection device, that is, the aforementioned component 20, is disposed opposite to the first display region 101 of the display panel, and is located inside the terminal device, facing away from the light exit surface of the display panel.
For example, the photodetection device may be the aforementioned front camera or light sensor. According to the detection signal output by the front camera or the optical sensor, information such as brightness or chromaticity of the light generated in the first display region can be determined.
The target picture can be a monochrome picture or a multi-color picture obtained by the first display area under the drive of data voltage of a binding point gray scale. The tie-point gray scale is usually the gray scale stored in the driving circuit of the display panel in the Gamma curve, although the Gamma curve corresponds to the data voltage of each gray scale, in order to reduce the space required for storage, usually only the data voltages of several tie-point gray scales, for example, 8 tie-point gray scales, are stored in the driving circuit, and the data voltages of other gray scales can be calculated according to these voltages. The binding gray scale voltage is also the data voltage of the binding gray scale. The tie point is a key point selected from the gray levels of 0 to 255, for example, 31, 63, 95, 127, 159, 191, 223, 255, and the driver circuit or the controller can calculate data of any gray level based on data of the key point.
In step S12, a display parameter of the first display region is obtained based on the first detection signal.
Wherein the display parameter may include at least one of chromaticity and luminance.
The display parameter of the first display region obtained in step S12 is used to reflect the degree of use loss of the first display region.
In the embodiment of the disclosure, since in the display parameter acquiring method, at least one of chromaticity and brightness of the first display area of the display panel is detected as the display parameter by the photodetection device which is arranged opposite to the first display area of the display panel and on the side of the display panel opposite to the light exit surface of the display panel, and a reference can be provided for independent compensation (correction) of the first display area by detecting the display parameter of the first display area of the display panel during the display process.
Also, in the related art, if it is necessary to detect the chromaticity or luminance of the display screen of the display panel during the use of the display panel by means of an external device (e.g., a luminance meter or the like), the chromaticity or luminance cannot be detected in real time during the use, and therefore, the chromaticity or luminance of the display panel during the use is not generally used as a reference for display correction, but only parameters such as current, voltage, or display duration, which can be measured by an internal sensor, are used as a reference for display correction. In the application, the chromaticity and/or the brightness of the display panel when the display screen is displayed can be obtained through the photoelectric detection device inside the terminal device, so that the reference parameters which can be used for display correction of the display panel in the using process are expanded.
Meanwhile, when the first display area displays the target picture, the display parameters of the first display area can accurately reflect the use loss condition of the first display area, for example, as the use duration of the display panel increases, the brightness generated by inputting the same data voltage gradually decreases when the same gray scale is displayed. Therefore, the use loss can be accurately reflected by the actually measured chromaticity and brightness. Compared with the statistical parameters such as the display time as a reference, the corresponding display control parameters can be more accurately selected based on the chromaticity and the brightness of the first display area, and the display effect of the display panel is improved.
Of course, the display parameters of the first display area acquired by the display parameter acquisition method provided by the embodiment of the present disclosure may also be used for performing other compensation processes.
Optionally, acquiring a first detection signal output by the photoelectric detection device when the first display area displays the target picture, includes:
acquiring ambient light information, wherein the ambient light information is used for indicating the brightness of ambient light;
when the brightness of the ambient light is smaller than a threshold value, a first detection signal output by the photoelectric detection device is acquired.
In this implementation, the brightness of the ambient light where the display panel is located is determined, and when the brightness of the ambient light is smaller than the threshold, the first detection signal output by the photoelectric detection device is obtained, so that the influence of the excessive ambient light on the first detection signal output by the photoelectric detection device is avoided, the obtaining precision of the display parameters is improved, and the subsequent precision of correcting the first display area of the display panel is improved.
Optionally, acquiring ambient light information comprises:
when each pixel of the display panel does not emit light, acquiring a second detection signal output by the photoelectric detection device;
ambient light information is derived based on the second detection signal.
In this implementation, the brightness of the ambient light is determined by detecting the second detection signal when the display panel is not emitting light, which is simple and accurate to implement.
Optionally, acquiring a first detection signal output by the photoelectric detection device when the first display area displays the target picture, includes:
outputting a display parameter acquisition instruction, wherein the display parameter acquisition instruction is used for indicating a user to place the display panel in an environment with low brightness of ambient light;
and after receiving a confirmation instruction of a user, acquiring a first detection signal output by the photoelectric detection device.
In this implementation, through output instruction, make the user place display panel to the less environment of ambient light, obtain the first detection signal of photoelectric detection equipment output this moment, avoid the too big influence that produces to the first detection signal of photoelectric detection equipment output of ambient light.
Optionally, the acquisition of the first detection signal may also be implemented by combining the two manners, that is: outputting a display parameter acquisition instruction; when a confirmation instruction of a user is received, acquiring ambient light information; when the brightness of the ambient light is less than a threshold value, a first detection signal is acquired.
Optionally, 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 the threshold value, correcting the first detection signal by adopting the second detection signal;
and obtaining the display parameters of the first display area based on the corrected first detection signal.
In this implementation, since the first detection signal includes the ambient light information and the second detection signal represents the 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 the first detection signal that is not affected by the ambient light.
Optionally, obtaining the display parameter of the first display area based on the first detection signal includes:
correcting the first detection signal based on the display frequency of the first display area;
and obtaining the display parameters of the first display area based on the corrected first detection signal.
In this implementation, the ambient light information in the first detection signal output by the photodetection device is removed by the display frequency of the first display region, thereby obtaining the first detection signal that is not affected by the ambient light.
It should be noted that the foregoing steps S11-S12 may be combined with the foregoing optional steps and the foregoing optional steps.
FIG. 5 is a flow diagram illustrating a display parameter acquisition method according to an example embodiment. Referring to fig. 5, the method may be performed by a display panel or a terminal device having the display panel, for example, by a driving circuit in the display panel, which is usually an integrated circuit, or a controller in the terminal device, which is usually an integrated circuit or a processing chip, and the display parameter obtaining method includes:
in step S21, a detection instruction signal is acquired.
Wherein the detection indication signal may be generated by a driving circuit in the display panel or a controller in the terminal device.
In the embodiment of the present disclosure, the detection indication signal may be generated in several ways:
first, the probing indication signal is generated periodically, for example, once every 30 days.
Second, non-periodic generation, which is described below with reference to fig. 6, fig. 6 is a curve of a function fitted to the luminance change of the first display region according to the embodiment of the present disclosure. In fig. 6, the horizontal axis represents time, the vertical axis represents the luminance of the first display region, and the luminance of the first display region in fig. 6 is generated by the data voltage of the same binding point gray scale, and referring to fig. 6, three lines respectively represent the luminance when displaying monochrome images of red, green, and blue, and it can be seen that the luminance of any color image gradually decreases with time. In connection with fig. 6, the aperiodic execution may take the following form: under the action of the data voltage of a certain binding point gray scale, a detection indication signal is generated when the brightness of a certain color is reduced by a fixed value. In other implementations, the aperiodic execution may also take the following form: under the action of data voltage of a certain binding point gray scale, each time the chroma of a certain color is reduced by a fixed value, a detection indication signal is generated.
Third, event trigger generation, such as when a user turns on the display correction function, generates a detection indication signal.
In step S22, upon acquisition of the detection instruction signal, a first detection signal output by the photodetection device at the time when the target screen is displayed in the first display region is acquired.
The photoelectric detection device is arranged opposite to the first display area of the display panel and is positioned on one side of the display panel opposite to the light emergent surface of the display panel.
For example, the photodetection device may be the aforementioned front camera or light sensor. According to the detection signal output by the front camera or the optical sensor, information such as brightness or chromaticity of the light generated in the first display region can be determined.
In one implementation manner of the embodiment of the present disclosure, acquiring a first detection signal output by a photoelectric detection device when a target picture is displayed in a first display area may include:
acquiring ambient light information, wherein the ambient light information is used for indicating the brightness of ambient light;
when the brightness of the ambient light is smaller than a threshold value, a first detection signal output by the photoelectric detection device is acquired.
In this implementation, the brightness of the ambient light where the display panel is located is determined, and when the brightness of the ambient light is smaller than the threshold, the first detection signal output by the photoelectric detection device is obtained, so that the influence of the excessive ambient light on the first detection signal output by the photoelectric detection device is avoided, the obtaining precision of the display parameters is improved, and the subsequent precision of correcting the first display area of the display panel is improved.
Wherein acquiring the ambient light information may include:
when each pixel of the display panel does not emit light, acquiring a second detection signal output by the photoelectric detection device;
ambient light information is derived based on the second detection signal.
In this implementation, the brightness of the ambient light is determined by detecting the second detection signal when the display panel is not emitting light, which is simple and accurate to implement.
The non-light emission of each pixel of the display panel comprises two modes: first, the display panel stops displaying; secondly, for a display panel adopting a Pulse Width Modulation (PWM) Modulation method, a black insertion operation may exist between two frames of pictures in a display process, that is, a short black screen time exists, and each pixel of the display panel does not emit light within the time.
In another implementation manner of the embodiment of the present disclosure, acquiring a first detection signal output by a photoelectric detection device when a target picture is displayed in a first display area may include:
outputting a display parameter acquisition instruction, wherein the display parameter acquisition instruction is used for indicating a user to place the display panel in an environment with low brightness of ambient light;
and after receiving a confirmation instruction of a user, acquiring a first detection signal output by the photoelectric detection device.
In this implementation, through output instruction, make the user place display panel to the less environment of ambient light, obtain the first detection signal of photoelectric detection equipment output this moment, avoid the too big influence that produces to the first detection signal of photoelectric detection equipment output of ambient light.
For example, the display parameter acquiring instruction may be a pop-up window, where the pop-up window includes a prompt message "please move to a darker environment", and meanwhile, a confirmation button is provided 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 multi-color picture obtained by the first display region driven by a data voltage of a binding gray scale. Therefore, when the detection signal is acquired, the detection signal may be acquired when the first display region displays a monochrome screen or when the first display region displays a multi-color screen. The monochrome picture refers to a red, green or blue picture, and the multicolor picture refers to a pure color picture obtained by combining at least two of three monochrome colors, such as a white picture.
The detection signal corresponding to the binding point gray scale is obtained when a monochrome picture is displayed, for example, the detection signal corresponding to the binding point gray scale is obtained when blue light is displayed, that is, a red sub-pixel and a green sub-pixel in each pixel are both 0 gray scale, and a blue sub-pixel is not 0 gray scale, so that monochrome-blue is displayed, and then the detection signal is obtained. In the method of acquiring the detection signal corresponding to the binding point gray scale when displaying the monochrome picture, different monochrome colors may be sequentially displayed, and then the detection signals may be respectively acquired, for example, red, green, and blue colors are sequentially displayed.
The detection signal corresponding to the binding point gray scale is obtained when the multi-color picture is displayed, for example, the detection signal corresponding to the binding point gray scale is obtained when the white light is displayed, at this time, each color sub-pixel in the first display area adopts the same gray scale to display the white light, and then the detection signal is obtained.
When the detection signal of the first display region is acquired, the second display region may not be displayed, thereby reducing interference with the detection signal of the first display region.
It should be noted that, before the camera is used to collect the luminance or chrominance information of the first display area, the method may further include: the camera is calibrated for brightness or chromaticity, and the calibration process is usually finished at the time of factory shipment.
In step S23, a display parameter of the first display region is obtained based on the first detection signal.
Optionally, 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 the threshold value, correcting the first detection signal by adopting the second detection signal;
and obtaining the display parameters of the first display area based on the corrected first detection signal.
In this implementation, since the first detection signal includes the ambient light information and the second detection signal represents the 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 the first detection signal that is not affected by the ambient light.
For example, the first probe signal and the second probe signal are differentially amplified to remove ambient light information from the first probe signal.
Optionally, obtaining the display parameter of the first display area based on the first detection signal includes:
correcting the first detection signal based on the display frequency of the first display area;
and obtaining the display parameters of the first display area based on the corrected first detection signal.
In this implementation manner, the first detection signal includes multiple frequency signal components, the display frequency of the first display region is adopted, the signal components of the first detection signal with frequencies different from the display frequency are removed, and the removed signal components include signal components corresponding to the ambient light information, so that the first detection signal which is not affected by the ambient light is obtained. The method can be realized under the condition that the user does not sense, and the influence on the use of the user is avoided.
Wherein, based on the display frequency of the first display area, modifying the first detection signal may include: analyzing the first detection signal, and determining signal components with different frequencies contained in the first detection signal; signal components of the first detection signal having frequencies different from the display frequencies of the first display region are removed.
For example, knowing that the display frequency of the first display region is 60Hz, the frequency of each signal component is determined by analyzing each signal component in the first detection signal, and then removing signal components other than 60Hz from the first detection signal, the removed signal components including ambient light information.
Wherein analyzing the respective signal components in the first detection signal may be performed using a fourier transform.
Wherein the display parameter may include at least one of chromaticity and luminance.
When the photodetection device is a photosensor, the first detection signal includes a detected electrical signal, and obtaining the display parameter of the first display region based on the corrected first detection signal may include: and determining the display parameters of the first display area according to the corresponding relation between the first detection signal and the display parameters. For example, the luminance of the first display region may be determined based on the correspondence between the detected electric signal and the luminance.
When the photodetection device is a camera, the first detection signal includes X, Y, and Z channel information of the camera, and the obtaining of the display parameter of the first display area based on the corrected first detection signal may include: converting X, Y and Z channel information acquired by a camera into R, G and B channel information of a display panel by adopting a matrix method, a polynomial method, a table look-up method or a neural network model method; and calculating the display parameters of the first display area according to the RG-B channel information of the display panel.
For example, the X Y Z channel information of the camera and the R G B channel information of the display panel have the following matrix mapping relationship, where R G B is a known parameter:
in this step, the X Y Z channel information collected by the camera can be converted into the R G B channel information of the display panel only according to the matrix.
In the above steps, the polynomial, the table and the neural network model in the polynomial method, the table look-up method or the neural network model method are calibrated or trained in advance, and only need to be used directly.
The calculating of the display parameter of the first display area according to the rgb channel information of the display panel means determining the luminance or the chrominance based on the rgb channel information.
It should be noted that, when the camera or the optical sensor is used for measurement, since the display panel is not completely transparent, there may be a certain loss in the light detected by the camera or the optical sensor compared to the light emitted from the front of the display panel, and the proportion of the loss is already considered in the above correspondence, algorithm or model. That is, in the above correspondence relationship, algorithm, or model, the conversion coefficient of the light actually emitted by the display panel and the light detected by the camera or the optical sensor is larger than the conversion coefficient of the light actually emitted by the display panel and the light detected from the front surface of the display panel.
FIG. 7 is a flowchart illustrating a display control parameter determination method according to an example embodiment. Referring to fig. 7, the method may be performed by a display panel or a terminal device having the display panel, for example, by a driving circuit in the display panel, which is usually an integrated circuit, or a controller in the terminal device, which is usually an integrated circuit or a processing chip, and the method for determining the display control parameter includes:
in step S31, the display parameters of the first display region are acquired.
Step S31 can be implemented by the steps shown in fig. 1 or fig. 2.
In step S32, a display control parameter for the first display region is determined based on the display parameter for the first display region, the display control parameter indicating a correspondence 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 for indicating a corresponding relationship between the gray scale and the first data voltage. During the displaying, the display parameter of the first display region is used to determine a first display control parameter of the first display region. For example, for a 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 for controlling each pixel to display.
The display control parameter of the second display area is assumed to be a second display control parameter, and the second display control parameter is used for indicating the corresponding relation between the gray scale and the second data voltage. Since the second display region is a non-high transmittance region, which is less lossy during use, the second display control parameter may be fixed. Alternatively, the second display control parameter is also varied, but to a different extent than the first display control parameter.
And respectively carrying out display control on a first display area and a second display area of the display panel by adopting the first display control parameter and the second display control parameter. The first display control parameter and the second display control parameter may be the same at an early stage of use of the display panel. That is, the first data voltage used in the first display region is the same as the second data voltage used in the second display region at the same gray scale.
The loss degree of the first display area is larger than the second loss degree along with the increase of the service time of the display panel, and at the moment, the actual brightness or the chroma generated by controlling the first display area by using the first data voltage is lower than the actual brightness or the chroma generated by controlling the second display area by using the second data voltage. The corresponding display control parameter is determined as a new first display control parameter by detecting the generated actual display parameter and then the display parameter range to which the actual display parameter belongs. The new first display control parameter and the second display control parameter are different. In the new first display control parameter and the second display control parameter, a first data voltage used by the first display area under the same gray scale is greater than a second data voltage used by the second display area. The larger the data voltage is, the larger the luminance is actually generated, so that the luminance loss due to the use loss of the first display region can be compensated.
Therefore, under the control of the first and second display control parameters, the first data voltage used by the first display area is different from the second data voltage used by the second display area under the same gray scale, and under the control of the first 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 first display area and the second display area are simultaneously controlled by the second data voltage, so that the display difference between the first display area and the second display area is reduced, and the uniformity of the display panel is improved.
Optionally, the determining the first display control parameter based on the display parameter of the first display area includes:
and determining the Gamma curve corresponding to the display parameter range where the display parameters of the first display area are located based on the corresponding relation between the display parameter range and the Gamma curve.
For example, different display stages are represented by different luminance ranges, such as a luminance range from a1 to a2 in the first stage, a luminance range from a2 to A3 in the second stage, and so on, wherein a1, a2 and A3 are gradually reduced.
In different Gamma curves, at least part of gray scales correspond to different data voltages. The smaller the display parameter range is, the larger the data voltage corresponding to the same gray scale in the corresponding Gamma curve is.
Optionally, the determining the first display control parameter based on the display parameter of the first display area includes:
and determining a display correction coefficient corresponding to the display parameter range in which the display parameters of the first display area are located based on the corresponding relation between the display parameter range and the display correction coefficient, wherein the display correction coefficient is used for correcting the initial Gamma curve.
The initial Gamma curve is also stored in the driving circuit of the display panel. The first display area and the second display area may share one initial Gamma curve, or different initial Gamma curves may be respectively used.
In this implementation manner, two methods for determining display control parameters based on the display parameters of the first display area are provided, one is to directly determine a Gamma curve, and the other is to use a coefficient for adjusting the Gamma curve used in the first display area, and both the two methods can obtain a new Gamma curve suitable for the current display panel, thereby ensuring display uniformity.
Fig. 8 is a schematic structural diagram illustrating a display parameter acquiring apparatus according to an exemplary embodiment, where the display parameter acquiring apparatus is applied to a display panel, and the display panel includes a first display area and a second display area, and a transmittance of the first display area is higher than that of the second display area, with reference to fig. 8, the display parameter acquiring apparatus includes: an acquisition module 401 and a processing module 402.
The acquiring module 401 is configured to acquire a first detection signal output by a photoelectric detection device when a target picture is displayed in a first display area, where the photoelectric detection device is arranged opposite to the first display area of the display panel and located on one side of the display panel opposite to a light emitting surface of the display panel;
a processing module 402 configured to obtain a display parameter of the first display region based on the first detection signal, wherein the display parameter may include at least one of chroma and brightness.
Optionally, the obtaining module 401 may include:
an acquisition sub-module 411 configured to acquire ambient light information indicating brightness of ambient light;
a first processing sub-module 412 configured to acquire a first detection signal output by the photodetection device when the brightness of the ambient light is less than the threshold value.
Optionally, the obtaining sub-module 411 is configured to obtain a second detection signal output by the photo-detection device when each pixel of the display panel does not emit light; ambient light information is derived based on the second detection signal.
Optionally, the obtaining module 411 includes:
an output sub-module 413 configured to output a display parameter acquisition instruction for instructing a user to place the display panel in an environment where the brightness of the ambient light is small;
and the first processing submodule 412 is configured to acquire a first detection signal output by the photodetection device after receiving a confirmation instruction of the user.
It should be noted that there may be only one output submodule 413 and the obtaining submodule 411, and of course, both may exist.
Optionally, the processing module 402 includes:
a correction submodule 421 configured to correct the first detection signal with the second detection signal when the brightness of the ambient light is greater than or equal to the threshold;
and the second processing sub-module 422 is configured to obtain the display parameters of the first display area based on the modified first detection signal.
Optionally, the processing module 402 includes:
a modification submodule 421 configured to modify the first detection signal based on the display frequency of the first display area;
the second processing submodule 522 is configured to obtain the display parameters of the first display area based on the modified first detection signal.
The manner in which the acquisition module 401 acquires the probe signal may be seen in steps S21 and S22; the manner in which the processing module 402 determines the display parameters may be referred to in step S23, and a detailed description thereof is omitted.
Fig. 9 is a schematic structural diagram of a display control parameter determination apparatus according to an exemplary embodiment, which is applied to a display panel, where the display panel includes a first display area and a second display area, and a transmittance of the first display area is higher than that of the second display area, and the display control parameter determination apparatus includes: a processing module 501 and a determining module 502.
A processing module 501 configured to obtain a display parameter of the first display area.
The processing module 501 may implement the obtaining of the display parameter of the first display area by using the steps shown in fig. 1 or fig. 2.
The determining module 502 is configured to determine a display control parameter of the first display area based on the display parameter of the first display area, wherein the display control parameter is used for indicating a corresponding relationship between gray scales and data voltages.
The manner of the obtaining module 501 obtaining the display parameters may be referred to in step S31; the manner in which the determining module 502 determines the display control parameter of the first display region may be referred to in step S32, and a detailed description is omitted here.
Fig. 10 is a block diagram illustrating a display parameter acquisition/display control parameter determination apparatus 600 according to an exemplary embodiment, where the apparatus 600 may be the aforementioned display panel or a mobile terminal having the display panel. Referring to fig. 10, display parameter acquisition 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 interface to input/output (I/O) 612, a sensor component 614, and a 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 a portion of the steps of the methods described above. Further, the processing component 602 can include one or more modules that facilitate interaction between the processing component 602 and other components. For example, the processing component 602 can include a multimedia module to facilitate interaction between the multimedia component 608 and the processing component 602.
The memory 604 is configured to store various types of data to support the operation at the display parameter acquisition apparatus 600. Examples of such data include instructions for any software program or method operating on display parameter capture device 600, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 604 may be implemented by any type or combination of volatile or non-volatile memory devices 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 disks.
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 an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation.
The 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 peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
In an exemplary embodiment, the display parameter acquisition 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), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described display parameter acquisition/display control parameter determination method.
In an exemplary embodiment, a non-transitory computer readable storage medium comprising instructions, such as the memory 604 comprising instructions, that may be executed by the processor 620 of the display parameter acquisition apparatus 600 to perform the display parameter acquisition method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
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 application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the 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 will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the 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 (11)
1. A display parameter acquisition method is applied to a display panel, the display panel comprises 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 comprises the following steps:
when each pixel of the display panel does not emit light, acquiring a second detection signal output by the photoelectric detection device;
obtaining ambient light information based on the second detection signal, wherein the ambient light information is used for indicating the brightness of ambient light;
when the brightness of the ambient light is smaller than a threshold value, acquiring a first detection signal output by the photoelectric detection device when a target picture is displayed in the first display area, wherein the photoelectric detection device is arranged opposite to the first display area of the display panel and is positioned on one side of the display panel opposite to the light emitting surface of the display panel;
when the brightness of the ambient light is greater than or equal to a threshold value, correcting the first detection signal by adopting the second detection signal;
and obtaining the display parameters of the first display area based on the corrected first detection signal.
2. The method according to claim 1, wherein the acquiring a first detection signal output by the photodetection device when the target screen is displayed in the first display region comprises:
outputting a display parameter acquisition instruction, wherein the display parameter acquisition instruction is used for instructing a user to place the display panel in an environment with low brightness of ambient light;
and acquiring a first detection signal output by the photoelectric detection equipment after receiving the confirmation instruction of the user.
3. The method of claim 1, wherein the deriving the display parameter of the first display area based on the first detection signal comprises:
correcting the first detection signal based on the display frequency of the first display area;
and obtaining the display parameters of the first display area based on the corrected first detection signal.
4. A method for determining display control parameters, the method comprising:
obtaining display parameters of the first display area by using the method according to any one of claims 1 to 3;
and determining a display control parameter of the first display area based on the display parameter of the first display area, wherein the display control parameter is used for indicating the corresponding relation between the gray scale and the data voltage.
5. A display parameter acquisition device is applied to a display panel, the display panel comprises 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 device comprises:
an acquisition module, comprising:
the acquisition sub-module is configured to acquire a second detection signal output by the photoelectric detection device when each pixel of the display panel does not emit light; obtaining ambient light information based on the second detection signal, wherein the ambient light information is used for indicating the brightness of ambient light;
a first processing sub-module configured to, when the brightness of the ambient light is smaller than a threshold, acquire a first detection signal output by the photodetection device when a target picture is displayed in the first display area, where the photodetection device is disposed opposite to the first display area of the display panel and on a side of the display panel opposite to the light exit surface of the display panel;
a processing module, comprising:
a correction submodule configured to correct the first detection signal with the second 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 corrected first detection signal.
6. The apparatus of claim 5, wherein the obtaining module comprises:
the output sub-module is configured to output a display parameter acquisition instruction, and the display parameter acquisition instruction is used for instructing a user to place the display panel in an environment with low brightness of ambient light;
the first processing submodule is configured to acquire a first detection signal output by the photoelectric detection device after receiving a confirmation instruction of the user.
7. The apparatus of claim 5, wherein the processing module comprises:
a correction submodule configured to correct the first detection signal based on a display frequency of the first display region;
the second processing submodule is configured to obtain display parameters of the first display area based on the corrected first detection signal.
8. A display control parameter determination apparatus applied to a display panel including a first display region and a second display region, the first display region having a higher transmittance than the second display region, the apparatus comprising:
a processing module configured to obtain display parameters of the first display region by using the method according to any one of claims 1 to 3;
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, wherein the display control parameter is used for indicating a corresponding relation between gray scales and data voltages.
9. A display parameter acquisition device is applied to a display panel, the display panel comprises 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 device comprises:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to perform the display parameter acquisition method of any one of claims 1 to 3.
10. A display control parameter determination apparatus applied to a display panel including a first display region and a second display region, the first display region having a higher transmittance than the second display region, the apparatus comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to perform the display control parameter determination method of claim 4.
11. A computer readable storage medium having computer instructions stored thereon, wherein the computer instructions, when executed by a processor, implement the method of any one of claims 1 to 3, or implement the method of claim 4.
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