CN112562587A - Display panel brightness compensation method and device and display panel - Google Patents
Display panel brightness compensation method and device and display panel Download PDFInfo
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- CN112562587A CN112562587A CN202011458977.XA CN202011458977A CN112562587A CN 112562587 A CN112562587 A CN 112562587A CN 202011458977 A CN202011458977 A CN 202011458977A CN 112562587 A CN112562587 A CN 112562587A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
Abstract
The embodiment of the invention discloses a display panel and a brightness compensation method and device thereof. In the brightness compensation method of the display panel provided by the embodiment of the invention, the brightness compensation is performed on the display panel according to the difference between the first display brightness and the second display brightness, so that the brightness difference of the first display area and the second display area under the preset gray scale picture is smaller than the preset brightness threshold, the problem that the brightness is inconsistent between the display areas with different total display time of the display panel due to the service life factor of the display panel is solved, and the display effect is ensured.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a brightness compensation method and device of a display panel and the display panel.
Background
The organic electroluminescent display panel is expected to become the next generation of mainstream display because it has the excellent characteristics of no need of backlight, high contrast, thin thickness, viewing angle light, fast reaction speed, wide use temperature range, simple structure and process, etc.
However, the display panel is prone to have inconsistent luminance between the display areas with different total display time, which affects the display effect.
Disclosure of Invention
The embodiment of the invention provides a display panel and a brightness compensation method and device thereof, which are used for realizing the compensation of the brightness of the display panel in different total display time display areas, ensuring the consistency of the brightness of the display areas with different total display time and ensuring the display effect.
In a first aspect, an embodiment of the present invention provides a brightness compensation method for a display panel, where the display panel includes a first display area and a second display area, and the first display area and the second display area perform screen display simultaneously or non-simultaneously, and the brightness compensation method for the display panel includes:
acquiring first display brightness of a preset gray scale picture corresponding to the first display area;
acquiring second display brightness of the second display area corresponding to a preset gray scale picture;
and performing brightness compensation on the display panel according to the difference between the first display brightness and the second display brightness, so that the brightness difference between the first display area and the second display area under a preset gray scale picture is smaller than a preset brightness threshold value.
Optionally, the total display time of the first display area is greater than the total display time of the second display area;
optionally, the display panel is a foldable display panel, wherein when the display panel is in an unfolded state, a first display area and a second display area of the display panel are displayed simultaneously, and when the display panel is in a folded state, only the first display area displays a picture;
optionally, the first display area is a non-light-transmitting display area, and the second display area is a light-transmitting display area, wherein when the display panel is in a camera shooting state, only the first display area performs image display, and when the display panel is in a non-camera shooting state, the first display area and the second display area perform image display simultaneously.
Optionally, the display panel further includes a display module and a fingerprint identification device located on one side of the display module, where the fingerprint identification device is located in the first display area;
the acquiring of the first display brightness of the first display area corresponding to the preset gray scale picture comprises:
acquiring reflected light brightness information of a preset gray scale picture corresponding to the first display area through the fingerprint identification device;
determining the first display brightness according to a first preset relation curve and the reflected light brightness information; the first preset relation curve is a relation curve of preset reflected light brightness information and brightness of a picture corresponding to a preset gray scale range in the first display area, the preset gray scale range comprises gray scales between the preset gray scale and an end point gray scale, and the end point gray scale is smaller than the preset gray scale.
Optionally, before the determining the first display brightness according to the first preset relationship curve and the reflected light brightness information, the method further includes:
and acquiring the first preset relation curve according to the brightness of each gray scale picture in the preset gray scale range and the reflected light brightness information corresponding to the brightness of each gray scale picture.
Optionally, the obtaining of the second display brightness of the second display area corresponding to the preset grayscale frame includes:
recording the display time of the second display area according to the voltage waveform of the data output to the second display area;
determining the second display brightness according to a second preset relation curve and the display time of the second display area; the second preset relation curve is a preset relation curve between the brightness of the second display area corresponding to the preset gray scale picture and the display time of the second display area.
Optionally, the recording the display time of the second display area according to the data voltage waveform output to the second display area includes:
and acquiring data voltage waveform records output to the second display area, and taking the sum of different time from the preset black data voltage waveform of the second display area in the data voltage waveform records as the display time of the second display area.
Optionally, the brightness compensation of the display panel according to the difference between the first display brightness and the second display brightness includes:
determining a brightness difference between the first display brightness and the second display brightness;
determining whether the brightness difference is equal to or greater than the preset brightness threshold; and if so, performing brightness compensation on the display panel according to the preset corresponding relation between the brightness difference and the data voltage compensation value.
Optionally, the brightness compensation of the display panel according to the difference between the first display brightness and the second display brightness includes:
performing brightness compensation on the first display area and/or the second display area according to the difference between the first display brightness and the second display brightness;
preferably, the first display area is luminance-compensated according to a difference between the first display luminance and the second display luminance.
In a second aspect, an embodiment of the present invention further provides a luminance compensation apparatus for a display panel, where the display panel includes a first display area and a second display area, and the first display area and the second display area perform screen display simultaneously or non-simultaneously, the apparatus includes:
the first brightness acquisition module is used for acquiring first display brightness of a preset gray scale picture corresponding to the first display area; the second brightness obtaining module is used for obtaining second display brightness of a preset gray machine picture corresponding to the second display area;
and the brightness compensation module is used for performing brightness compensation on the display panel according to the difference between the first display brightness and the second display brightness so as to enable the brightness difference between the first display area and the second display area under a preset gray scale picture to be smaller than a preset brightness threshold value.
In a third aspect, an embodiment of the present invention further provides a display panel, where the display panel includes the luminance compensation device of the display panel according to the second aspect, and the display panel further includes a first display area and a second display area, and the first display area and the second display area perform screen display simultaneously or non-simultaneously.
The display panel comprises a first display area and a second display area, wherein the first display area and the second display area simultaneously or non-simultaneously display pictures, and the display panel is subjected to brightness compensation according to the difference between the first display brightness and the second display brightness so that the brightness difference of the first display area and the second display area under the preset gray scale picture is smaller than the preset brightness threshold value.
Drawings
FIG. 1 is a flowchart illustrating a method for compensating brightness of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another display panel provided in the embodiment of the present invention;
FIG. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 6 is a flowchart illustrating a brightness compensation method for a display panel according to another embodiment of the present invention;
FIG. 7 is a flowchart illustrating a brightness compensation method for a display panel according to another embodiment of the present invention;
fig. 8 is a schematic structural diagram of a luminance compensation apparatus of a display panel according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As described in the background art, the display panel is prone to have inconsistent luminance between the display regions with different total display time, which affects the display effect. The inventors have found that the above-mentioned problems occur because the conventional partial display panel, for example, the main display region (the display region that displays in both the folded state and the unfolded state) and the extended display region (the display region that displays in the unfolded state and does not display in the folded state) of the folded display panel can be displayed simultaneously or not simultaneously, and the total display time of the main display region is generally longer than that of the extended display region. The organic electroluminescent diode has a service life problem, that is, the luminance of the organic electroluminescent diode is gradually reduced along with the increase of the total light emitting time, so that the luminance of a display area with longer total display time is obviously reduced, and therefore, luminance differences appear in display areas with different total display time, so that a display panel is subjected to a screen splitting phenomenon, and the display effect of the display panel is influenced.
In view of the above, an embodiment of the present invention provides a method for compensating brightness of a display panel, fig. 1 is a flowchart of a method for compensating brightness of a display panel according to an embodiment of the present invention, fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention, fig. 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention, where fig. 2 may correspond to a structure of a display panel shown in fig. 3 in a flat state, fig. 3 may correspond to a structure of a display panel shown in fig. 2 in a folded state, and referring to fig. 2 and fig. 3, a display panel 10 includes a first display area 11 and a second display area 12, and the first display area 11 and the second display area 12 perform image display simultaneously or non-simultaneously. In fig. 2 and fig. 3, the display panel is taken as an example of a foldable display panel, and the display panel may also be another display panel that includes a first display area and a second display area, and the first display area and the second display area may be displayed simultaneously or may not be displayed simultaneously.
Referring to fig. 1, the brightness compensation method of the display panel includes:
s10, obtaining a first display brightness of the first display area corresponding to the preset gray scale picture.
Specifically, for the first display area, the preset gray scale frame may be a frame when the first display area displays a preset gray scale. The preset gray scale is a preset display gray scale. Optionally, the preset gray scale picture is a maximum gray scale white picture that can be displayed by the display panel. Illustratively, the display panel includes a red sub-pixel, a green sub-pixel and a blue sub-pixel, and the maximum gray scale white picture may be a white picture obtained by mixing red, green and blue when the red sub-pixel displays the maximum gray scale, the green sub-pixel displays the maximum gray scale and the blue sub-pixel displays the maximum gray scale.
The first display brightness of the first display area corresponding to the preset gray scale picture refers to the brightness of the first display area when the picture is displayed under the preset gray scale. In the driving chip for driving the display panel, the gray scales correspond to the data voltages one to one, and the first display area displays the brightness of the picture under the preset gray scale, that is, the display brightness of the first display area when the data voltages corresponding to the preset gray scale are provided for the sub-pixels of the first display area.
The first display brightness may be obtained by lighting the sub-pixels of the first display area with data voltages corresponding to the preset gray scale, and then obtaining the first display brightness by the driving chip through a device such as a CCD camera connected to the driving chip, or directly or indirectly obtaining the first display brightness through other methods, which is not specifically limited herein.
S11, obtaining a second display brightness of the second display area corresponding to the preset gray scale picture.
Specifically, unlike step S10, the second display brightness of the second display region corresponding to the predetermined gray-scale frame refers to the brightness of the second display region displaying the frame at the predetermined gray-scale. The second display area displays the brightness of the picture under the preset gray scale, namely the display brightness of the second display area when the sub-pixels of the second display area are provided with the data voltage corresponding to the preset gray scale.
The second display brightness may be obtained by lighting the sub-pixels of the second display area with the data voltages corresponding to the preset gray scales, and then obtaining the second display brightness with the driving chip through a device such as a CCD camera connected to the driving chip, or directly or indirectly obtaining the second display brightness through other methods, which is not specifically limited herein.
S12, performing brightness compensation on the display panel according to the difference between the first display brightness and the second display brightness, so that the brightness difference between the first display area and the second display area under the preset gray scale picture is smaller than a preset brightness threshold value.
Specifically, the difference between the first display brightness and the second display brightness is determined according to the first display brightness and the second display brightness, that is, the difference between the display brightness of the first display area and the display brightness of the second display area is determined, so that the brightness compensation is performed on the display panel according to the difference between the display brightness, optionally, when the brightness compensation is performed, the brightness difference between the first display area and the second display area under the preset gray scale picture can be eliminated by compensating the data voltage corresponding to the sub-pixel in the first display area and/or the second display area under the preset gray scale picture, so that the brightness difference between the first display area and the second display area caused by the difference of the total light emitting time and the life factor can be eliminated; or the brightness difference of the first display area and the second display area under the preset gray scale picture is smaller than the preset brightness threshold value, so that the split-screen display difference visible to human eyes between the first display area and the second display area of the display panel is avoided, the consistency of the brightness between the first display area and the second display area of the display panel is ensured, and the display effect is ensured.
The preset brightness threshold value may be preset according to a minimum brightness difference value visible to human eyes, where the minimum brightness difference value visible to human eyes may be obtained by performing a test on a large number of minimum brightness differences visible to human eyes of users, and optionally, a minimum value or an average value of the minimum brightness differences visible to human eyes of the users is used as the preset brightness threshold value.
It should be noted that, in the above steps of the compensation method of the display panel of this embodiment, the compensation data corresponding to the preset gray scale may be obtained by performing the brightness compensation according to the brightness difference between the preset gray scale picture corresponding to the first display area and the preset gray scale picture corresponding to the second display area, and the compensation data corresponding to other gray scales (for example, non-preset gray scales) may be obtained according to the compensation data of the preset gray scale. Optionally, a plurality of preset gray scale pictures are preset, and then compensation data corresponding to other gray scales are obtained by using a difference method according to the compensation data corresponding to the preset gray scales respectively.
According to the brightness compensation method of the display panel, provided by the embodiment of the invention, the first display brightness of the first display area corresponding to the preset gray scale picture and the second display brightness of the second display area corresponding to the preset gray scale picture are obtained, and then the brightness compensation is carried out on the display panel according to the difference between the first display brightness and the second display brightness, so that the brightness difference of the first display area and the second display area under the preset gray scale picture is smaller than the preset brightness threshold value, the problem that the brightness of the display panel is inconsistent between the display areas with different total display time due to the service life factor of the display panel is solved, and the display effect is ensured.
On the basis of the foregoing technical solution, optionally, in step S12 in the foregoing embodiment, performing brightness compensation on the display panel according to the difference between the first display brightness and the second display brightness includes: determining a brightness difference between the first display brightness and the second display brightness; judging whether the brightness difference is equal to or larger than a preset brightness threshold value; and if so, performing brightness compensation on the display panel according to the preset corresponding relation between the brightness difference and the data voltage compensation value.
Specifically, the correspondence between the data voltage compensation value and the luminance difference may be stored in advance; each luminance difference may correspond to a set of data voltage compensation values, each set of data voltage compensation values may include a plurality of data voltage compensation values, and the data voltage compensation values may correspond to the sub-pixels one to one. Alternatively, the data voltage compensation values of the same color sub-pixels corresponding to the same gray scale may be equal.
When the luminance difference between the first display luminance and the second display luminance is determined, it may be first determined whether the luminance difference is equal to or greater than a preset luminance threshold, and if so, it may be determined that the first display region and the second display region have a data voltage compensation value for luminance compensation required when the luminance difference is the current luminance difference, from a correspondence between a data voltage compensation value and the luminance difference stored in advance. If the brightness difference between the first display brightness and the second display brightness is smaller than the preset brightness threshold, it is indicated that the brightness difference between the first display area and the second display area is very small and is not enough to affect the display effect, and the brightness compensation can not be performed on the first display area and/or the second display area.
On the basis of the above technical solution, optionally, the total display time of the first display area is greater than the total display time of the second display area. Specifically, if the total display time of the first display area is longer than the total display time of the second display area, the brightness of the first display area decreased by the lifetime factor is larger than the brightness of the second display area decreased by the lifetime factor.
As described in the foregoing embodiment, alternatively, the display panel 10 is a foldable display panel, wherein the display panel 10 can be displayed in an unfolded state as shown in fig. 2, the first display area 11 and the second display area 12 of the display panel 10 are displayed simultaneously, and the display panel 10 can be displayed in a folded state as shown in fig. 3, in which only the first display area 11 is displayed.
Specifically, for a flexible OLED folding display panel, which comprises a first display area and a second display area, both the first display area and the second display area are displayed when the flexible OLED folding display panel is in an unfolding state, only the first display area is displayed when the flexible OLED folding display panel is in a folding state, the total display time of the first display area is longer than the total display time of the second display area, so that the brightness of the first display area reduced along with the total display time is longer than the brightness of the second display area reduced along with the total display time due to the service life factor of a light emitting diode, the phenomenon that the brightness of the first display area is inconsistent with that of the second display area is caused, and when the brightness of the first display area reduced along with the total display time is larger than the brightness of the second display area reduced along with the total display time to a certain degree, the brightness difference that can be seen by human eyes even appears when the flexible OLED folding display panel is displayed between the first display area and the second display area, the split screen phenomenon occurs, and the display effect is seriously influenced.
The brightness compensation method of the display panel provided by the embodiment of the invention is applied to the folding display panel or the full-screen display panel, the first display brightness of the first display area corresponding to the preset gray-scale picture and the second display brightness of the second display area corresponding to the preset gray-scale picture are respectively obtained, and then the brightness compensation is carried out on the first display area and/or the second display area of the display panel according to the difference between the first display brightness and the second display brightness, so that the brightness difference of the first display area and the second display area under the preset gray-scale picture can be eliminated, the display brightness consistency of the first display area and the second display area is ensured, or the brightness difference of the first display area and the second display area under the preset gray-scale picture is smaller than the preset brightness threshold value, the visual split-screen display phenomenon of human eyes is avoided, and the display effect is ensured.
Optionally, fig. 4 is a schematic structural diagram of another display panel provided in an embodiment of the present invention, and referring to fig. 4, a first display area 21 of a display panel 20 is a non-light-transmitting display area, and a second display area 22 of the display panel 20 is a light-transmitting display area, where when the display panel 20 is in a shooting state, only the first display area 21 performs image display, and when the display panel 20 is in a non-shooting state, the first display area 21 and the second display area 22 perform image display simultaneously.
Specifically, for a display panel designed with a camera under a screen, the display panel comprises a non-light-transmitting display area and a light-transmitting display area, namely, a first display area is a non-light-transmitting display area, a second display area is a light-transmitting display area, only the non-light-transmitting display area displays when displaying in a camera shooting state, the non-light-transmitting display area and the light-transmitting display area both display when displaying in a non-camera shooting state, the total display time of the visible non-light-transmitting display area is longer than the total display time of the light-transmitting display area, and similarly, the service life factor of the light-emitting diode causes the brightness of the non-light-transmitting display area reduced along with the total display time to be longer than the brightness of the light-transmitting display area reduced along with the total display time, so that the brightness of the non-light-transmitting display area and the light-transmitting display area are inconsistent, when the brightness of the non-light-transmitting display, the non-light-transmitting display area and the light-transmitting display area can also have the brightness difference visible by the split screen of human eyes during display, the split screen phenomenon occurs, and the display effect is seriously influenced.
Wherein, in the non-light-transmitting display region, the light-transmitting area may be smaller than a first set value, for example, the first set value may be 10%; in the light-transmissive display region, the light-transmissive area may be greater than a second set value, and for example, the second set value may be 30%. Both the light-transmissive display region and the non-light-transmissive display region of the display panel may include a transparent substrate. An opaque film may be disposed on the transparent substrate in the non-transmissive display region to form the non-transmissive region. When the non-light-transmitting display area is provided with the light sensing device, such as a fingerprint chip or an iris device, the position of the transparent substrate corresponding to the light sensing device is not provided with a light-proof film so as to ensure that the position of the transparent substrate corresponding to the light sensing device transmits light, and thus the normal work of the light sensing device is not influenced even if the light sensing device is arranged in the non-light-transmitting display area.
The brightness compensation method of the display panel provided by the embodiment of the invention is applied to the display panel designed with the under-screen camera, and the first display brightness of the non-transparent display area corresponding to the preset gray scale picture and the second display brightness of the transparent display area corresponding to the preset gray scale picture are respectively obtained, so that the brightness compensation is carried out on the non-transparent display area and/or the transparent display area of the display panel according to the difference between the first display brightness and the second display brightness, the brightness difference of the non-transparent display area and the transparent display area under the preset gray scale picture can be eliminated, the display brightness consistency of the non-transparent display area and the transparent display area is ensured, or the brightness difference of the non-transparent display area and the transparent display area under the preset gray scale picture is smaller than the preset brightness threshold, the visible split screen display phenomenon of human eyes is avoided, and the display effect is ensured.
Optionally, in the foregoing embodiment, the performing, in step S12, brightness compensation on the display panel according to the difference between the first display brightness and the second display brightness includes: performing brightness compensation on the first display area and/or the second display area according to the difference between the first display brightness and the second display brightness; optionally, the first display area is luminance compensated according to a difference between the first display luminance and the second display luminance.
Specifically, the brightness compensation of the display panel according to the difference in display brightness may be the brightness compensation of the first display region and/or the second display region. And for the situation that the brightness of the first display area reduced by the life factor is greater than the brightness of the second display area reduced by the life factor, the brightness compensation can be preferentially performed on the first display area according to the difference between the first display brightness and the second display brightness so as to simplify the compensation process, and the brightness of the first display area reduced more than that of the second display area, or the brightness of the first display area reduced more than that of the normal display brightness level, so that the brightness compensation can be preferentially performed on the first display area, and the brightness of the first display area is pertinently compensated to the normal display brightness level, so that the better brightness compensation effect on the display panel is realized.
Optionally, fig. 5 is a schematic structural diagram of another display panel provided in an embodiment of the present invention, referring to fig. 5, the display panel 10 further includes a display module and a fingerprint identification device 13 located on one side of the display module, the fingerprint identification device 13 is located in the first display area 11, optionally, fig. 6 is a flowchart of a luminance compensation method of another display panel provided in an embodiment of the present invention, referring to fig. 6, the luminance compensation method of the display panel includes:
and S20, acquiring the reflected light brightness information of the first display area corresponding to the preset gray scale picture through the fingerprint identification device.
Specifically, the fingerprint identification device is used to implement a fingerprint identification function of the display panel, such as fingerprint unlocking, fingerprint payment, fingerprint verification, or fingerprint matching, for example, the fingerprint identification device is a fingerprint identification chip in the display panel in the art. The display panel includes the fingerprint identification district, and the fingerprint identification device can be located the fingerprint identification district, and when the surface position that corresponds at the fingerprint identification district of display panel placed the discernment main part, for example when the finger placed the surface or the top on the surface of the display panel that the fingerprint identification district corresponds, the light that display panel sent can reflect to the fingerprint identification device through the human body, and the luminous reverberation of display panel can be received to the fingerprint identification device when being sheltered from promptly when the fingerprint identification device. The reflected light information includes, but is not limited to, the intensity of the reflected light.
S21, determining first display brightness according to the first preset relation curve and the brightness information of the reflected light; the first preset relation curve is preset reflection light brightness information and is a relation curve of brightness of a picture corresponding to a preset gray scale range in the first display area, the preset gray scale range comprises gray scales between the preset gray scale and an end point gray scale, and the end point gray scale is smaller than the preset gray scale.
The preset gray scale range comprises gray scales between a preset gray scale and an end point gray scale, and the end point gray scale is smaller than the preset gray scale. For example, the predetermined gray scale is 255 gray scales for displaying the white image, the end point gray scale is a gray scale smaller than 255 gray scales for displaying the white image, and the predetermined gray scale range is a gray scale range between 255 gray scales for displaying the white image and the end point gray scale. Illustratively, the endpoint gray scale is 1 gray scale, 10 gray scale, 245 gray scale, 248 gray scale, 249 gray scale or 250 gray scale of the displayed white image. Since the luminance attenuation caused by the display time is limited, the endpoint gray scale may be selected as a gray scale whose difference from the preset gray scale is smaller than a preset threshold, for example, the preset threshold may be 30, and the endpoint gray scale is 225 gray scale when the preset gray scale is 255.
The first preset relation curve is a preset relation curve, and the preset relation curve is a relation curve between the brightness of the picture corresponding to the preset gray scale range in the first display area and the brightness information of the reflected light of the display panel when the display panel displays the brightness. For example, the predetermined gray scale range is a gray scale range between 255 gray scales and 249 gray scales of the displayed white image, the first predetermined relationship curve includes the brightness when the display panel displays the 255 gray scale of the white frame and the reflected light information of the display panel under the brightness, the brightness when the display panel displays the 254 gray scale of the white frame and the reflected light information of the display panel under the brightness, the brightness when the display panel displays the 253 gray scale of the white frame and the reflected light information of the display panel under the brightness, the brightness when the display panel displays the 252 gray scale of the white frame and the reflected light information of the display panel under the brightness, the brightness when the display panel displays the 251 gray scale of the white frame and the reflected light information of the display panel under the brightness, the brightness when the display panel displays the 250 gray scale of the white frame and the reflected light information of the display panel under the brightness, and the brightness when the display panel displays the 249 gray scale of the white frame and the reflected light information of the display panel under the brightness.
Accordingly, in this embodiment, after the reflected light brightness information of the first display area corresponding to the preset grayscale image is acquired by the fingerprint identification device, the first display brightness is obtained according to the first preset relationship curve and the reflected light brightness information.
S22, obtaining a second display brightness of the second display area corresponding to the preset gray scale picture. Specifically, the step S22 can be specifically implemented by referring to the step S11 of the above embodiment.
S23, performing brightness compensation on the display panel according to the difference between the first display brightness and the second display brightness, so that the brightness difference between the first display area and the second display area under the preset gray scale picture is smaller than a preset brightness threshold value. Specifically, the step S23 can be specifically implemented by referring to the step S12 of the above embodiment.
Optionally, before determining the first display brightness according to the first preset relationship curve and the reflected light brightness information at step S21, the method further includes: and acquiring a first preset relation curve according to the brightness of each gray scale picture in a preset gray scale range and the reflected light brightness information corresponding to the brightness of each gray scale picture.
Specifically, a first preset relationship curve may be obtained in advance, and the first preset relationship curve may be further stored in advance to be applied when the first display brightness of the first display area or the second display brightness of the second display area is obtained. For example, the display panel is respectively enabled to perform image display under each gray scale within a preset gray scale range, and image brightness and reflected light information corresponding to the image brightness when the display panel performs image display under each gray scale are correspondingly recorded, so that a first preset relation curve is obtained.
In this embodiment, when the fingerprint identification device is disposed in the first display area, the fingerprint identification device can receive the reflected light emitted by the first display area when the fingerprint identification device is shielded, so that the reflected light brightness information of the first display area corresponding to the preset gray-scale image can be obtained through the fingerprint identification device, and the first display brightness is determined according to the first preset relationship curve and the reflected light brightness information. The first display brightness of the first display area obtained through the fingerprint identification device and the first preset relationship curve may be obtained when the fingerprint identification device is shielded every time, or obtained when the fingerprint identification device is continuously shielded for several times, which is not limited in this embodiment. That is, in this embodiment, reflected light brightness information of the first display area corresponding to the preset grayscale image can be obtained through a fingerprint identification device (fingerprint identification chip) originally arranged in the display panel, and the first display brightness of the first display area is obtained according to the reflected light brightness information and the first preset relationship curve.
In addition, in another optional embodiment of the present invention, the fingerprint identification device may also be disposed in the second display area or disposed in the second display area, so that the reflected light brightness information of the second display area corresponding to the preset gray-scale image can also be obtained through the fingerprint identification device, and the second display brightness is determined according to the reflected light brightness information and the first preset relationship curve.
Optionally, fig. 7 is a flowchart of another brightness compensation method for a display panel according to an embodiment of the present invention, and referring to fig. 7, the brightness compensation method for a display panel includes:
s30, obtaining a first display brightness of the first display area corresponding to the preset gray scale picture. Specifically, the step S30 can be specifically implemented by referring to the step S10 of the above embodiment.
And S31, recording the display time of the second display area according to the data voltage waveform output to the second display area.
Specifically, there are various methods for acquiring the display time of the second display area, and in this embodiment, the display time of the second display area is recorded according to the voltage waveform of the data output to the second display area.
Optionally, the step S31 includes:
and acquiring data voltage waveform records output to the second display area, and taking the sum of different time from the preset black data voltage waveform of the second display area in the data voltage waveform records as the display time of the second display area.
Specifically, a preset black-state data voltage corresponding to the second display area may be stored in the brightness compensation device of the display panel, and the second display area displays a black state or is in a non-display state under the preset black-state data voltage, so that when the data voltage waveform output to the second display area is the same as the preset black-state data voltage waveform of the second display area, it indicates that the second display area is in the non-display state, and when the data voltage waveform output to the second display area is different from the preset black-state data voltage waveform of the second display area, it indicates that the second display area is in the display state.
Accordingly, the data voltage waveform record output to the second display area is obtained, and the time different from the preset black state data voltage waveform of the second display area in the data voltage waveform record is summed to be used as the display time of the second display area. The summing of the times of the recording of the data voltage waveforms, which are different from the preset black-state data voltage waveforms of the second display area, may be performed in units of time of one frame. Optionally, the preset black-state data voltage waveform is a black-state data voltage waveform corresponding to the second display area in one frame, and the time of each frame, in which the data voltage waveform is different from the preset black-state data voltage waveform in the data voltage waveform recording, may be summed to obtain the time, in which the data voltage waveform is different from the preset black-state data voltage waveform in the second display area, in the data voltage waveform recording. .
S32, determining second display brightness according to the second preset relation curve and the display time of the second display area; the second preset relation curve is a relation curve between the brightness of the preset gray scale picture corresponding to the preset second display area and the display time of the second display area.
Specifically, the second predetermined relationship curve is a predetermined relationship curve, and the predetermined relationship curve is a relationship curve between the brightness of the second display area corresponding to the predetermined gray-scale image and the display time of the second display area. That is, the second preset relationship curve can be obtained from the second preset relationship curve, and the second display area corresponds to different display brightness of the preset gray scale image at different display time, so that the second preset relationship curve can be understood as a life curve of the light emitting diode corresponding to the preset gray scale. For example, the preset gray scale is a gray scale for displaying a white image, for example, the preset gray scale is a 255 gray scale for displaying a white image, and the preset gray scale can be obtained from the second preset relationship curve, and the second display region displays different display luminances of the white image at different display times, for example, a lighting test is performed at the highest luminance of the white image and a relationship curve of the lighting test with time is obtained. The second preset relationship curve may be predetermined, and then, the second display brightness of the second display area is obtained by obtaining the display time of the second display area and according to the obtained display time of the second display area and the second preset relationship curve stored in advance.
S34, performing brightness compensation on the display panel according to the difference between the first display brightness and the second display brightness, so that the brightness difference between the first display area and the second display area under the preset gray scale picture is smaller than a preset brightness threshold value. The step S34 can be referred to in step S12 of the above embodiment.
In this embodiment, the second display brightness of the second display area may be obtained according to the current total display time of the second display area and the second preset relationship curve, where the current total display time of the second display area is obtained by summing the time in the data voltage waveform record of the second display area, which is different from the preset black-state data voltage waveform of the second display area, and there is no need to provide an additional timing circuit, a timing device, and the like in the display panel, so that the display panel does not occupy an additional space.
In addition, in another optional embodiment of the present invention, the data voltage waveforms in the first display area may also be preset, and the times that are different from the preset black data voltage waveforms in the first display area in the data voltage waveform recording of the first display area are summed, so as to obtain the current total display time of the first display area, and further obtain the first display brightness of the first display area according to the second preset relationship curve.
In the above embodiment, the fingerprint identification devices are usually disposed in the first display area, and the total light emitting duration of the first display area is longer than the total light emitting duration of the second display area, so that the brightness of the first display area is decreased more than that of the second display area, so that the first display brightness of the first display area is obtained through the fingerprint identification device and the first preset relationship curve, and the first display brightness of the first display area is more conveniently obtained, for example, the user can obtain the first display brightness of the first display area each time the fingerprint is identified (i.e. when the user wants to use the display panel), and the accuracy is higher and the comparison with the second display brightness is performed by directly obtaining the first display brightness according to the real-time reflected light information, and the fingerprint identification device is usually not disposed for the second display area, and the total light emitting duration of the second display area is relatively short, so that the brightness decrease is relatively small, therefore, the second display brightness can be obtained through the total display time of the second display area and the second preset relation curve.
An embodiment of the present invention further provides a brightness compensation apparatus for a display panel, where the display panel includes a first display area and a second display area, and the first display area and the second display area perform image display simultaneously or non-simultaneously, and fig. 8 is a schematic structural diagram of the brightness compensation apparatus for a display panel according to the embodiment of the present invention, and referring to fig. 8, the brightness compensation apparatus for a display panel includes:
a first brightness obtaining module 110, configured to obtain a first display brightness of the first display area corresponding to the preset grayscale frame; a second brightness obtaining module 120, configured to obtain a second display brightness of the second display area corresponding to the preset gray machine picture;
the brightness compensation module 130 is configured to perform brightness compensation on the display panel according to a difference between the first display brightness and the second display brightness, so that a brightness difference between the first display area and the second display area under a preset grayscale frame is smaller than a preset brightness threshold.
Specifically, the first brightness obtaining module 110 obtains a first display brightness of the first display area corresponding to the preset gray-scale picture, and the second brightness obtaining module 120 obtains a second display brightness of the second display area corresponding to the preset gray-scale picture. The brightness compensation module 130 determines a difference between the first display brightness and the second display brightness according to the first display brightness and the second display brightness, namely, the difference of the display brightness of the first display area and the second display area is determined, so that the brightness compensation is carried out on the display panel according to the difference of the display brightness to eliminate the brightness difference of the first display area and the second display area under the preset gray scale picture, thereby eliminating the brightness difference between the first display area and the second display area caused by the difference of the total light emitting time and the life factor, or the brightness difference of the first display area and the second display area under the preset gray scale picture is smaller than the preset brightness threshold value, so that the split-screen display difference visible to human eyes between the first display area and the second display area of the display panel is avoided, the consistency of the brightness of the first display area and the second display area of the display panel is ensured, and the display effect is ensured.
The brightness compensation device for a display panel according to the embodiment of the present invention and the brightness compensation method for a display panel according to any of the above embodiments belong to the same inventive concept, and both can achieve the same technical effect, and repeated content is not repeated here.
The embodiment of the present invention further provides a display panel, where the display panel includes the compensation device provided in the above embodiment, the brightness compensation device of the display panel may be integrated in a driving chip, and the display panel further includes a first display area and a second display area, and the first display area and the second display area perform image display simultaneously or non-simultaneously.
The display panel provided by the embodiment of the present invention and the brightness compensation device of the display panel described in the above embodiments belong to the same inventive concept, and both can achieve the same technical effect, and repeated content is not repeated here.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A brightness compensation method of a display panel, wherein the display panel comprises a first display area and a second display area, and the first display area and the second display area display images simultaneously or non-simultaneously, the brightness compensation method of the display panel comprises:
acquiring first display brightness of a preset gray scale picture corresponding to the first display area;
acquiring second display brightness of the second display area corresponding to a preset gray scale picture;
and performing brightness compensation on the display panel according to the difference between the first display brightness and the second display brightness, so that the brightness difference between the first display area and the second display area under a preset gray scale picture is smaller than a preset brightness threshold value.
2. The luminance compensation method of a display panel according to claim 1, wherein a total display time of the first display region is longer than a total display time of the second display region;
preferably, the display panel is a foldable display panel, wherein when the display panel is in an unfolded state, the first display area and the second display area of the display panel are displayed simultaneously, and when the display panel is in a folded state, only the first display area displays a picture;
preferably, the first display area is a non-light-transmitting display area, and the second display area is a light-transmitting display area, wherein when the display panel is in a camera shooting state, only the first display area performs image display, and when the display panel is in a non-camera shooting state, the first display area and the second display area perform image display simultaneously.
3. The brightness compensation method of the display panel according to claim 1 or 2, wherein the display panel further comprises a display module and a fingerprint identification device located at one side of the display module, the fingerprint identification device being located in the first display area;
the acquiring of the first display brightness of the first display area corresponding to the preset gray scale picture comprises:
acquiring reflected light brightness information of a preset gray scale picture corresponding to the first display area through the fingerprint identification device;
determining the first display brightness according to a first preset relation curve and the reflected light brightness information; the first preset relation curve is a relation curve of preset reflected light brightness information and brightness of a picture corresponding to a preset gray scale range in the first display area, the preset gray scale range comprises gray scales between the preset gray scale and an end point gray scale, and the end point gray scale is smaller than the preset gray scale.
4. The method of claim 3, further comprising, before the determining the first display brightness according to the first predetermined relationship curve and the reflected light brightness information:
and acquiring the first preset relation curve according to the brightness of each gray scale picture in the preset gray scale range and the reflected light brightness information corresponding to the brightness of each gray scale picture.
5. The method of claim 1, wherein the obtaining the second display brightness of the second display region corresponding to the preset grayscale frame comprises:
recording the display time of the second display area according to the voltage waveform of the data output to the second display area;
determining the second display brightness according to a second preset relation curve and the display time of the second display area; the second preset relation curve is a preset relation curve between the brightness of the second display area corresponding to the preset gray scale picture and the display time of the second display area.
6. The method of claim 5, wherein the recording the display time of the second display region according to the data voltage waveform output to the second display region comprises:
and acquiring data voltage waveform records output to the second display area, and taking the sum of different time from the preset black data voltage waveform of the second display area in the data voltage waveform records as the display time of the second display area.
7. The method of claim 1, wherein the brightness compensation of the display panel according to the difference between the first display brightness and the second display brightness comprises:
determining a brightness difference between the first display brightness and the second display brightness;
determining whether the brightness difference is equal to or greater than the preset brightness threshold; and if so, performing brightness compensation on the display panel according to the preset corresponding relation between the brightness difference and the data voltage compensation value.
8. The method of claim 1 or 2, wherein the performing brightness compensation on the display panel according to the difference between the first display brightness and the second display brightness comprises:
performing brightness compensation on the first display area and/or the second display area according to the difference between the first display brightness and the second display brightness;
preferably, the first display area is luminance-compensated according to a difference between the first display luminance and the second display luminance.
9. A luminance compensation apparatus for a display panel, the display panel including a first display region and a second display region, the first display region and the second display region displaying pictures at the same time or at different times, the apparatus comprising:
the first brightness acquisition module is used for acquiring first display brightness of a preset gray scale picture corresponding to the first display area;
the second brightness obtaining module is used for obtaining second display brightness of a preset gray machine picture corresponding to the second display area;
and the brightness compensation module is used for performing brightness compensation on the display panel according to the difference between the first display brightness and the second display brightness so as to enable the brightness difference between the first display area and the second display area under a preset gray scale picture to be smaller than a preset brightness threshold value.
10. A display panel comprising the display device according to claim 9, wherein the display panel further comprises a first display region and a second display region, and wherein the first display region and the second display region display images simultaneously or non-simultaneously.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114283732A (en) * | 2021-12-29 | 2022-04-05 | Oppo广东移动通信有限公司 | Brightness compensation method, device, storage medium and electronic equipment |
| WO2023164978A1 (en) * | 2022-03-03 | 2023-09-07 | 武汉华星光电半导体显示技术有限公司 | Brightness adjusting method and apparatus for display panel |
| US11955074B2 (en) | 2021-02-15 | 2024-04-09 | Samsung Electronics Co., Ltd. | Electronic device and method for calibrating image data in electronic device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106898332A (en) * | 2017-04-17 | 2017-06-27 | 惠州Tcl移动通信有限公司 | A kind of method and system for adjusting screen intensity |
| CN107728979A (en) * | 2017-09-30 | 2018-02-23 | 联想(北京)有限公司 | A kind of processing method and electronic equipment |
| CN109521605A (en) * | 2018-12-24 | 2019-03-26 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN109981843A (en) * | 2019-03-15 | 2019-07-05 | Oppo广东移动通信有限公司 | Screen processing method, apparatus, electronic equipment and the storage medium of electronic equipment |
| CN110164367A (en) * | 2019-05-05 | 2019-08-23 | 霸州市云谷电子科技有限公司 | Brightness adjusting method, device and the display screen of display screen |
| CN110910826A (en) * | 2019-12-19 | 2020-03-24 | 京东方科技集团股份有限公司 | Brightness compensation method and device of display panel and display module |
| CN110969126A (en) * | 2019-12-02 | 2020-04-07 | 厦门天马微电子有限公司 | Display device |
| CN112002278A (en) * | 2020-08-28 | 2020-11-27 | 合肥维信诺科技有限公司 | Display panel and debugging method thereof |
-
2020
- 2020-12-11 CN CN202011458977.XA patent/CN112562587A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106898332A (en) * | 2017-04-17 | 2017-06-27 | 惠州Tcl移动通信有限公司 | A kind of method and system for adjusting screen intensity |
| CN107728979A (en) * | 2017-09-30 | 2018-02-23 | 联想(北京)有限公司 | A kind of processing method and electronic equipment |
| CN109521605A (en) * | 2018-12-24 | 2019-03-26 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN109981843A (en) * | 2019-03-15 | 2019-07-05 | Oppo广东移动通信有限公司 | Screen processing method, apparatus, electronic equipment and the storage medium of electronic equipment |
| CN110164367A (en) * | 2019-05-05 | 2019-08-23 | 霸州市云谷电子科技有限公司 | Brightness adjusting method, device and the display screen of display screen |
| CN110969126A (en) * | 2019-12-02 | 2020-04-07 | 厦门天马微电子有限公司 | Display device |
| CN110910826A (en) * | 2019-12-19 | 2020-03-24 | 京东方科技集团股份有限公司 | Brightness compensation method and device of display panel and display module |
| CN112002278A (en) * | 2020-08-28 | 2020-11-27 | 合肥维信诺科技有限公司 | Display panel and debugging method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11955074B2 (en) | 2021-02-15 | 2024-04-09 | Samsung Electronics Co., Ltd. | Electronic device and method for calibrating image data in electronic device |
| CN114283732A (en) * | 2021-12-29 | 2022-04-05 | Oppo广东移动通信有限公司 | Brightness compensation method, device, storage medium and electronic equipment |
| CN114283732B (en) * | 2021-12-29 | 2024-02-23 | Oppo广东移动通信有限公司 | Brightness compensation method and device, storage medium and electronic equipment |
| WO2023164978A1 (en) * | 2022-03-03 | 2023-09-07 | 武汉华星光电半导体显示技术有限公司 | Brightness adjusting method and apparatus for display panel |
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