CN114863876A - Display panel, display driving method thereof and electronic device - Google Patents
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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]
- G09G3/3225—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] using an active matrix
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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
- G09G3/2007—Display of intermediate tones
- G09G3/2074—Display of intermediate tones using sub-pixels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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Abstract
The application discloses a display panel, a display driving method thereof and an electronic device, wherein the display panel comprises: a pixel unit including: the pixel array comprises a first pixel for emitting first primary color light, a second pixel for emitting second primary color light, and a third pixel for emitting third primary color light; at least one of the first pixel, the second pixel and the third pixel comprises two sub-pixels, the two sub-pixels are respectively a first sub-pixel and a second sub-pixel, and the area of the first sub-pixel is smaller than that of the second pixel; the pixel circuit is used for controlling pixels in the pixel unit to perform light-emitting display; for a pixel unit to be displayed by emitting light, if the brightness to be displayed of the set primary color light is smaller than a set threshold value, controlling the first sub-pixel to emit light, and if the brightness to be displayed is not smaller than the set threshold value, controlling the first sub-pixel and the second sub-pixel to emit light simultaneously; the first sub-pixel and the second sub-pixel are used for emitting the set primary light.
Description
Technical Field
The present disclosure relates to the field of electronic devices, and more particularly, to a display panel, a display driving method thereof, and an electronic device.
Background
With the continuous progress of science and technology, more and more electronic devices with display functions are widely applied to daily life and work of people, bring great convenience to the daily life and work of people, and become an indispensable important tool for people at present. The main component of the electronic device that implements the display function is the display panel.
An OLED (organic light emitting diode) display panel is one of the mainstream display panels at present because of its advantages of high brightness, low power consumption, fast response speed, high definition, good flexibility, and the like. However, the conventional OLED display panel has poor image display quality in low gray scale display.
Disclosure of Invention
In view of the above, the present application provides a display panel, a display driving method thereof and an electronic device, and the scheme is as follows:
a display panel, comprising:
a pixel unit including: the pixel array comprises a first pixel for emitting first primary color light, a second pixel for emitting second primary color light, and a third pixel for emitting third primary color light; at least one of the first pixel, the second pixel and the third pixel comprises two sub-pixels, the two sub-pixels are respectively a first sub-pixel and a second sub-pixel, and the area of the first sub-pixel is smaller than that of the second pixel;
the pixel circuit is used for controlling pixels in the pixel unit to perform light-emitting display;
for a pixel unit to be displayed by emitting light, if the brightness to be displayed of the set primary color light is smaller than a set threshold value, controlling the first sub-pixel to emit light, and if the brightness to be displayed is not smaller than the set threshold value, controlling the first sub-pixel and the second sub-pixel to emit light simultaneously; the first sub-pixel and the second sub-pixel are used for emitting the set primary light.
This application technical scheme still provides an electronic equipment, includes: the display panel is provided.
The technical solution of the present application further provides a display driving method for the display panel, including:
acquiring data to be displayed;
determining to-be-displayed brightness of primary color light in a pixel unit to be displayed in a light emitting manner based on to-be-displayed data;
controlling the pixel unit to perform luminous display based on the brightness to be displayed;
if the brightness to be displayed of the set primary color light is smaller than a set threshold, controlling the first sub-pixel to emit light, and if the brightness to be displayed is not smaller than the set threshold, controlling the first sub-pixel and the second sub-pixel to emit light simultaneously; the first sub-pixel and the second sub-pixel are used for emitting the set primary light.
As can be seen from the above description, in the display panel, the display driving method thereof, and the electronic device provided in the technical solution of the present application, at least one sub-pixel is provided, where the at least one sub-pixel includes two sub-pixels with different areas, and when the pixel circuit controls the pixel unit to perform light emitting display, if the to-be-displayed luminance of the primary light is set to be smaller than the set threshold, the first sub-pixel is controlled to emit light, and if the to-be-displayed luminance is not smaller than the set threshold, the first sub-pixel and the second sub-pixel are controlled to emit light simultaneously. Therefore, the problem of display color cast caused by the change of the proportion of different primary color light during low gray scale display can be solved, and the display quality is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in related arts, the drawings used in the description of the embodiments or prior arts will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
The structures, proportions, and dimensions shown in the drawings and described in the specification are for illustrative purposes only and are not intended to limit the scope of the present disclosure, which is defined by the claims, but rather by the claims, it is understood that these drawings and their equivalents are merely illustrative and not intended to limit the scope of the present disclosure.
FIG. 1 is a graph of luminous efficiency versus current density for OLED devices of different emission colors in an OLED display panel;
fig. 2 is a top view of a display panel according to an embodiment of the present disclosure;
fig. 3 is a cross-sectional view of a display panel according to an embodiment of the present disclosure;
fig. 4 is a top view of another display panel provided in the embodiments of the present application;
fig. 5 is a top view of another display panel provided in the embodiments of the present application;
fig. 6 is a top view of another display panel provided in the embodiments of the present application;
FIG. 7 is a cross-sectional view of the display panel shown in FIG. 6;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure;
fig. 9 is a flowchart illustrating a display driving method according to an embodiment of the present disclosure.
Detailed Description
Embodiments of the present application will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the application are shown, and in which it is to be understood that the embodiments described are merely illustrative of some, but not all, of the embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a graph illustrating luminous efficiency and current density of OLED devices of different luminous colors in an OLED display panel. Wherein the horizontal axis represents current density J, and the unit is Ma/cm 2 (ii) a The vertical axis is the normalized luminous efficiency. In fig. 1, a curve Lr represents a luminous efficiency versus current density curve of a red OLED device, a curve Lg represents a luminous efficiency versus current density curve of a green OLED device, and a curve Lb represents a luminous efficiency versus current density curve of a blue OLED device.
As can be seen from fig. 1, when the current density of the red light OLED device, the green light OLED device, and the blue light OLED device is relatively high, the respective luminous efficiencies are approximately unchanged, the curves of the luminous efficiencies and the current densities corresponding to the red light OLED device, the green light OLED device, and the blue light OLED device are approximately horizontal straight lines, and in the horizontal straight line region, the luminous efficiency does not change along with the current density, so that the change of the current density does not cause the change of the ratio of the red light to the green light to the blue light. That is to say, when the display panel displays high brightness at a high gray scale, the driving current is large, the current density is large, and the area of the OLED device is fixed, and although the change of the driving current can cause the change of the current density, the luminous efficiency of the OLED devices with different luminous colors is not changed because the OLED devices are located in the horizontal line region, so that the proportion change of the red, green and blue primary colors light can not be caused.
As can be seen from fig. 1, when the current density of the red OLED device, the green OLED device, and the blue OLED device is small, the respective luminous efficiencies of the red OLED device, the green OLED device, and the blue OLED device are attenuated, and the attenuation speeds are different, and the curves of the luminous efficiencies corresponding to the three devices and the current density are curves in which the slope of the tangent line gradually decreases, so that in the area of the part of the curve, the luminous efficiencies decrease with the decrease of the current density, and the attenuation rates of the luminous efficiencies of the three types of OLED devices with different luminous colors are different. That is to say, when the display panel performs low-luminance display in low gray scale, the driving current is small, the current density is small, and the driving current corresponds to a curve region where the luminous efficiency is greatly attenuated, while the area of the OLED device is constant, and the change of the driving current can cause the change of the current density.
Therefore, when low-brightness light emitting display is carried out at a low gray scale, the variation of the driving current can cause the instability of the light emitting efficiency of the OLED devices with three different light emitting colors, and further cause the temperature-sensitive color cast and the smear color cast of the OLED display panel. When low-brightness display is carried out in low gray scale, the temperature sensitivity or the pixel current of the first frame can cause the change of the current density, so that the proportion of red, green and blue three-primary-color light is changed, color cast is caused, and the image display quality of the display panel is influenced.
In order to solve the above problem, an embodiment of the present application provides a display panel, a display driving method thereof, and an electronic device, where the display panel includes:
a pixel unit including: the pixel array comprises a first pixel for emitting first primary color light, a second pixel for emitting second primary color light, and a third pixel for emitting third primary color light; at least one of the first pixel, the second pixel and the third pixel comprises two sub-pixels, the two sub-pixels are respectively a first sub-pixel and a second sub-pixel, and the area of the first sub-pixel is smaller than that of the second pixel;
the pixel circuit is used for controlling pixels in the pixel unit to perform light-emitting display;
for a pixel unit to be displayed by emitting light, if the brightness to be displayed of the set primary color light is smaller than a set threshold value, controlling the first sub-pixel to emit light, and if the brightness to be displayed is not smaller than the set threshold value, controlling the first sub-pixel and the second sub-pixel to emit light simultaneously; the first sub-pixel and the second sub-pixel are used for emitting the set primary light.
The method has the advantages that the brightness of the primary color light is set to be smaller than the set threshold value in the pixel unit to be lighted, when low-gray-scale display is needed, the first sub-pixel with the smaller control area emits light, light emitting display is carried out through the first sub-pixel with the smaller area under the same driving current, the current density is improved, and therefore the luminous efficiency is improved.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 2 and fig. 3, fig. 2 is a top view of a display panel provided in an embodiment of the present application, and fig. 3 is a cross-sectional view of the display panel provided in the embodiment of the present application, where the display panel includes:
a pixel unit 10, the pixel unit 10 comprising: a plurality of pixels P, specifically, the pixel unit 10 includes a first pixel 101 for emitting a first primary color light, a second pixel 102 for emitting a second primary color light, and a third pixel 103 for emitting a third primary color light; at least one of the first pixel 101, the second pixel 102 and the third pixel 103 includes two sub-pixels, the two sub-pixels are a first sub-pixel 21 and a second sub-pixel 22, respectively, and the area of the first sub-pixel 21 is smaller than that of the second sub-pixel 22;
a pixel circuit 11, wherein the pixel circuit 11 is used for controlling the pixel P in the pixel unit 10 to perform light-emitting display;
for the pixel unit 10 to be displayed by emitting light, if the brightness to be displayed of the set primary color light is smaller than the set threshold, the first sub-pixel 21 is controlled to emit light, and if the brightness to be displayed is not smaller than the set threshold, the first sub-pixel 21 and the second sub-pixel 22 are controlled to emit light at the same time; the first sub-pixel 21 and the second sub-pixel 22 are used to emit light of a set primary color.
In the embodiment of the application, the display panel is an OLED display panel, and the pixels are OLED devices. In the conventional display panel, the areas of all the OLED devices emitting light of the same color are the same. In the same pixel unit, the respective areas of the OLED devices with different light-emitting colors are set based on parameters such as the lifetime and the light-emitting efficiency of the pixel. The conventional display panel does not consider that the OLED device has low brightness, and the problems of great attenuation and different attenuation rates of the OLED devices with different luminous colors due to low current density exist, so that the problem of severe color cast exists when low-brightness display is carried out under low gray scale. In the embodiment of the present application, when the brightness of the primary color light in the pixel unit 10 to be illuminated is set to be less than the set threshold and low gray scale display is required, the first sub-pixel 21 with a smaller control area emits light, the light emitting display is performed through the first sub-pixel 21 having a smaller area under the same driving current, the current density is increased, thereby increasing the light emitting efficiency, when low-brightness display is performed in low gray scale, the difference of attenuation rates of the luminous efficiencies of the pixels P with different luminous colors is reduced, so that the attenuation rates of the luminous efficiencies of the pixels P with different luminous colors are the same or similar, thus, when the pixel P corresponding to the primary color light is set to emit light with low brightness, the problem of the change of the proportion of different primary color lights of the pixel unit 10 to be emitted due to low current density is solved, and the problem of display color cast caused by the color cast is solved, and the image display quality of the display panel during low-brightness display at low gray scale is improved.
The display panel is an OLED display panel, and the pixel circuit 11 includes a thin film transistor TFT. The circuit configuration of the pixel circuit may be set based on display driving requirements, including but not limited to a 7T1C pixel circuit having 7 thin film transistors and 1 storage capacitor.
For three kinds of pixels P with different light emitting colors in the same pixel unit 10, the pixel P with the highest light emitting efficiency at the same current density includes two sub-pixels with different areas, or the other two kinds of pixels P except the pixel P with the lowest light emitting efficiency at the same current density include two sub-pixels with different areas.
In the embodiment of the present application, in the first pixel 101, the second pixel 102, and the third pixel 103, the light emitting efficiency of the first pixel 101 is the largest under the same current density; the first pixel 101 includes two sub-pixels with different areas.
In a conventional display panel, under the same current density, the OLED device with the maximum luminous efficiency has the maximum luminous efficiency attenuation rate, so that the proportion of the emergent light of the OLED device is smaller than a standard value, and the problem of color cast is caused. According to the technical scheme provided by the embodiment of the application, the first pixel 101 comprises two different sub-pixels, when the first pixel 101 needs to perform low-brightness display under a low gray scale, and when the sub-pixel with a smaller control area performs light-emitting display, under the condition that the driving current is unchanged, the sub-pixel with a smaller area can have a larger current density, so that the problem of color cast caused by difference of attenuation rate of light-emitting efficiency when different light-emitting color pixels P perform low-brightness display under a low gray scale is solved.
In the embodiment of the present application, the first primary color light is green light, and the first pixel 101 includes two sub-pixels with different areas. The first pixel 101 is a green OLED device. As shown in FIG. 2, in the same pixel cell 10, the green OLED device G includes a first green OLED device G1 and a second green OLED device G2, and the area of the first green OLED device G1 is smaller than the area of the second green OLED device G2. Wherein the set threshold is not more than 0.05 nit. In the OLED display panel, under the same current density, the luminous efficiency of a green OLED device is the largest, and under the lower current density, the attenuation rate of the luminous efficiency is the largest, so that the luminous ratio of the green OLED device is reduced.
Optionally, the light emitting efficiency of the second pixel 102 is greater than that of the third pixel 103 at the same current density; the second pixel 102 includes two sub-pixels with different areas. Under the same current density, compared with the third pixel 103 with the minimum luminous efficiency, the luminous efficiency has a higher attenuation rate, which leads to the reduction of the luminous ratio.
In a conventional display panel, under the same current density, the luminous efficiencies of a green light OLED device G, a red light OLED device and a blue light OLED device B are reduced in sequence, and the luminous efficiencies of the green light OLED device G, the red light OLED device and the blue light OLED device B are different in attenuation speed. When low-brightness display is carried out under low gray scale, the standard light-emitting ratio of the green OLED device G, the red OLED device and the blue OLED device B is set as a: b: c. with the blue OLED device B as a reference, since the light emitting efficiency of the green OLED device decays at a high rate, the light emitting ratio of the green OLED device G to the blue OLED device B is less than a: c. by taking the blue OLED device B as a reference, the luminous efficiency attenuation speed of the red OLED device R is high, so that the luminous ratio of the red OLED device R to the blue OLED device is less than B: c.
in the technical scheme of the application, the first pixel 101 is set to include two sub-pixels with different areas, the second pixel 1012 includes two sub-pixels with different areas, and when low-luminance display is performed on a low gray scale, the first pixel 101 and the second pixel 102 are both displayed by using the sub-pixels with smaller areas, for example, the difference between the actual light emitting ratio of the first pixel 101 and the standard light emitting ratio of the third pixel 103 can be reduced, the difference between the actual light emitting ratio of the second pixel 102 and the standard light emitting ratio of the third pixel 103 can be reduced, the color cast problem is solved, and the display quality is improved. When the first pixel 101 is the green light OLED device G, the second pixel 102 is the red light OLED device R, and the third pixel 103 is the blue light OLED device B, and low-brightness display is performed at low gray scale, by adopting the technical scheme of the application, the actual light emitting ratio of the green light OLED device G and the blue light OLED device B and the standard light emitting ratio a can be enabled to be as follows: c is the same or similar, so that the actual light emitting ratio of the red OLED device R and the blue OLED device B is equal to the standard light emitting ratio B: c are the same or similar, so that the problem of color cast caused by different luminous efficiency attenuation rates when the pixels P with different luminous colors perform low-brightness display at low gray scale is solved.
For a sub-pixel having two different areas, the area is equal to the sum of the areas of the two sub-pixels. When the first pixel 101 includes two sub-pixels having different light emitting areas, the area of the first pixel 101 is larger than that of the second pixel 102, and the area of the first sub-pixel 21 in the first pixel 101 is smaller than that of the first sub-pixel 21 in the second pixel 102. Thus, when low-luminance display is performed in low gray scale, the first sub-pixel 21 in the first pixel 101 has a larger current density, the difference between the light-emitting efficiency decay rate of the first pixel 101 and the light-emitting efficiency decay rate of the second pixel 102 is reduced, and the problem of color cast caused by the difference between the light-emitting efficiency decay rates of the pixels P with different light-emitting colors during low-luminance display in low gray scale is solved.
In the embodiment of the present application, one way is to set the first primary color light to be green light and the second primary color light to be red light, that is, the first pixel 101 is a green OLED device G, and the second pixel 102 is a red OLED device R. The first pixel and the second pixel comprise two sub-pixels with different areas. Thus, when low-luminance display is performed in a low gray scale, the actual light emitting ratio of the green OLED device G and the red OLED device R to the standard light emitting ratio a: b are the same or similar.
In a conventional display panel, when a first pixel 101 is a green OLED device G, a second pixel 102 is a red OLED device R, and a third pixel 103 is a blue OLED device B, in an actual display process, since the green OLED device G and the red OLED device R also have a problem of different light-emitting efficiency attenuation rates, when low-luminance display is performed at a low gray scale, an actual light-emitting ratio of the green OLED device G to the red OLED device R is less than a: b. by adopting the technical scheme, when low-brightness display is carried out on low gray scale, the actual light emitting ratio of the green light OLED device G and the red light OLED device R and the standard light emitting ratio a can be realized: b are the same or similar.
For an OLED display panel, generally, the light emitting efficiency of the green OLED device G, the red OLED device R, and the blue OLED device decreases sequentially at the same current density. In the embodiment of the present disclosure, the first pixel 101 is a green OLED device G, the first primary color light is green light, the second pixel 102 is a red OLED device R, the second primary color light is red light, the third pixel 103 is a blue OLED device B, and the third primary color light is blue light.
In the same pixel unit 10, four pixel openings are arranged in a 2 × 2 array corresponding to the four pixel openings; for the same pixel unit 10, one of the first pixel 101, the second pixel 102 and the third pixel 103 includes two sub-pixels with different areas, the other two sub-pixels are respectively located at two diagonal positions of the 2 × 2 array, and the two sub-pixels with different areas are respectively located at the other two diagonal positions of the 2 × 2 array.
As shown in fig. 2, the first pixel 101 is a green OLED device G, the second pixel 102 is a red OLED device R, and the third pixel 103 is a blue OLED device B. In the same pixel unit 10, two OLED devices G1, G2 with different areas corresponding to the first pixel 101 are respectively located at two diagonal positions of the 2 × 2 array, and the red OLED device R as the second pixel 102 and the blue OLED device B as the third pixel 103 are respectively located at the other two diagonal positions of the 2 × 2 array.
When the pixel arrangement mode shown in fig. 2 is adopted, a pixel opening mode with diamond arrangement can be adopted, the size of the pixel openings of the two green light OLED devices can be adjusted without increasing process steps, the process compatibility is good, and the manufacturing cost is low.
In the embodiment of the present application, it is also possible to arrange that, in the same pixel unit 10, the pixel P having a single area and the pixel P having two sub-pixels having different areas are located on the same straight line, as shown in fig. 4 and 5.
Referring to fig. 4, fig. 4 is a top view of another display panel provided in this embodiment of the present disclosure, in this manner, in the same pixel unit 10, a first pixel 101, a second pixel 102, and a third pixel 103 are sequentially arranged along a first direction; wherein, for a first sub-pixel and a second sub-pixel belonging to the same pixel P, the two sub-pixels are arranged in a first direction; the first direction is parallel to the plane of the display panel. According to the method, one or two of the RGB pixels can be split into two sub-pixels with different areas on the basis of the existing RGB three pixel array arrangement mode, only the mask pattern of the pixel opening needs to be changed, the process steps are not increased, the process compatibility is good, and the manufacturing cost is low.
Referring to fig. 5, fig. 5 is a top view of another display panel provided in this embodiment, in this way, in the same pixel unit 10, a first pixel 101, a second pixel 102, and a third pixel 103 are sequentially arranged along a first direction; wherein, for a first sub-pixel and a second sub-pixel belonging to the same pixel P, the two sub-pixels are arranged in a second direction; the first direction is perpendicular to the second direction and is parallel to the plane of the display panel. In the same way, on the basis of the existing RGB three-pixel array arrangement mode, one or two of the pixels can be split into two sub-pixels with different areas, only the mask pattern of the pixel opening needs to be changed, the process steps are not increased, the process compatibility is good, and the manufacturing cost is low.
In the embodiment of the present application, as shown in fig. 2, 4 and 5, two sub-pixels having different areas are disposed in the same layer as the pixel P having a single area. As shown in fig. 2, the sub-pixels P and the pixels P with a single area are located in the same array, and each sub-pixel and each pixel P with a single area individually correspond to an array element position of the array, or, as shown in fig. 4 and 5, the pixels P are arranged in an array, and each pixel P corresponds to an array element position of the array. Two sub-pixels belonging to the same pixel P are located at the same array element position of the array.
In other ways, for a pixel P having two sub-pixels with different areas, two different layers of sub-pixels belonging to the same pixel P may be provided, as shown in fig. 6 and 7.
Referring to fig. 6 and 7, fig. 6 is a top view of another display panel provided in an embodiment of the present disclosure, and fig. 7 is a cross-sectional view of the display panel shown in fig. 6, in this way, the display panel has an array substrate 100, and the array substrate 100 includes a base and a pixel circuit on a surface of the base. One side of the pixel circuit, which is far away from the substrate, is provided with a pixel unit 10; for the first sub-pixel 21 and the second sub-pixel 22 belonging to the same pixel P, the first sub-pixel 21 is located on the side of the second sub-pixel 22 facing away from the substrate. In the mode, a procedure is added to the existing RGB three pixel array arrangement mode to form a stacked two-layer OLED device structure, the manufacturing process is simple, and the manufacturing cost is low.
As can be seen from the above description, in the display panel provided in the embodiment of the present application, by setting at least one pixel P to have two sub-pixels with different areas, when low-luminance display is performed in a low gray scale, the problem that different pixels P are color cast due to different decay rates of light emitting efficiency can be solved.
Based on the above display panel embodiment, another embodiment of the present application further provides an electronic device, where the electronic device is as shown in fig. 8.
Referring to fig. 8, fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure, where the electronic device includes the display panel 31 in the above embodiment.
The electronic device includes, but is not limited to, an electronic device with a display function, such as a smart phone, a tablet computer, a notebook computer, and a wearable device.
In the embodiment of the present application, the electronic device uses the display panel 31 in the above embodiment, and when low-luminance display is performed at low gray scale, the problem of color cast of different pixels P due to different attenuation rates of light emitting efficiency is solved.
Based on the foregoing display panel embodiment, another embodiment of the present application further provides a display driving method of the display panel of the foregoing embodiment, where the display driving method is as shown in fig. 9.
Referring to fig. 9, fig. 9 is a schematic flowchart of a display driving method according to an embodiment of the present disclosure, where the display driving method includes:
step S11: acquiring data to be displayed;
step S12: determining to-be-displayed brightness of primary color light in a pixel unit to be displayed in a light emitting manner based on to-be-displayed data;
step S13: controlling the pixel unit to perform luminous display based on the brightness to be displayed;
if the brightness to be displayed of the set primary color light is smaller than a set threshold, controlling the first sub-pixel to emit light, and if the brightness to be displayed is not smaller than the set threshold, controlling the first sub-pixel and the second sub-pixel to emit light simultaneously; the first sub-pixel and the second sub-pixel are used for emitting the set primary light.
When the display driving method is adopted to drive the display panel to perform light emitting display, whether the display brightness of the set primary color in the pixel unit to be displayed is smaller than a set threshold value or not can be determined based on data to be displayed, if yes, the first sub-pixel with the smaller area in the pixel capable of emitting the set primary color is controlled to perform light emitting display, and the current density can be improved due to the smaller area, so that the problem of color cast caused by different light emitting efficiency attenuation rates of different pixels is solved.
The embodiments in the present description are described in a progressive manner, or in a parallel manner, or in a combination of a progressive manner and a parallel manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments can be referred to each other. As for the electronic device and the display driving method disclosed in the embodiments, since they correspond to the display panel disclosed in the embodiments, the description is relatively simple, and the relevant points can be described with reference to the corresponding portions of the display panel.
It should be noted that in the description of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only used for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (12)
1. A display panel, comprising:
a pixel unit including: the pixel array comprises a first pixel for emitting first primary color light, a second pixel for emitting second primary color light, and a third pixel for emitting third primary color light; at least one of the first pixel, the second pixel and the third pixel comprises two sub-pixels, the two sub-pixels are respectively a first sub-pixel and a second sub-pixel, and the area of the first sub-pixel is smaller than that of the second pixel;
the pixel circuit is used for controlling pixels in the pixel unit to perform light-emitting display;
for the pixel unit to be displayed by emitting light, if the brightness to be displayed of the set primary color light is smaller than a set threshold value, the first sub-pixel is controlled to emit light, and if the brightness to be displayed is not smaller than the set threshold value, the first sub-pixel and the second sub-pixel are controlled to emit light simultaneously; the first sub-pixel and the second sub-pixel are used for emitting the set primary light.
2. The display panel according to claim 1, wherein in the first pixel, the second pixel, and the third pixel, the light emission efficiency of the first pixel is the largest at the same current density;
wherein the first pixel comprises two sub-pixels with different areas.
3. The display panel according to claim 2, wherein the first primary color light is green light, and the first pixel comprises two sub-pixels having different areas;
wherein the set threshold is not greater than 0.05 nit.
4. The display panel according to claim 2, wherein the luminous efficiency of the second pixel is greater than that of the third pixel at the same current density;
wherein the second pixel comprises two sub-pixels with different areas.
5. The display panel according to claim 4, wherein in the same pixel unit, the area of the first pixel is larger than that of the second pixel, and the area of the first sub-pixel in the first pixel is smaller than that of the first sub-pixel in the second pixel.
6. The display panel according to claim 4, wherein the first primary color light is green light, and the second primary color light is red light;
the first pixel and the second pixel comprise two sub-pixels with different areas.
7. The display panel according to claim 1, wherein in the same pixel unit, four pixel openings are arranged in a 2 x 2 array;
for the same pixel unit, one of the first pixel, the second pixel and the third pixel comprises two sub-pixels with different areas, the other two sub-pixels are respectively located at two diagonal positions of a 2 × 2 array, and the two sub-pixels with different areas are respectively located at the other two diagonal positions of the 2 × 2 array.
8. The display panel according to claim 1, wherein the first pixel, the second pixel, and the third pixel are sequentially arranged in a first direction in the same pixel unit;
wherein, for the first sub-pixel and the second sub-pixel belonging to the same pixel, both are arranged in the first direction; the first direction is parallel to the plane of the display panel.
9. The display panel according to claim 1, wherein the first pixel, the second pixel, and the third pixel are sequentially arranged in a first direction in the same pixel unit;
wherein, for the first sub-pixel and the second sub-pixel belonging to the same pixel, both are arranged in a second direction; the first direction is perpendicular to the second direction and is parallel to the plane of the display panel.
10. The display panel according to claim 1, wherein the display panel has an array substrate including a base and the pixel circuit on a surface of the base;
one side of the pixel circuit, which is far away from the substrate, is provided with the pixel unit;
for the first sub-pixel and the second sub-pixel belonging to the same pixel, the first sub-pixel is located on one side of the second sub-pixel, which is far away from the substrate.
11. An electronic device, comprising: the display panel of any one of claims 1-10.
12. A display driving method for a display panel according to any one of claims 1 to 10, comprising:
acquiring data to be displayed;
determining to-be-displayed brightness of primary color light in a pixel unit to be displayed in a light emitting manner based on to-be-displayed data;
controlling the pixel unit to perform light emitting display based on the brightness to be displayed;
if the brightness to be displayed of the set primary color light is smaller than a set threshold value, controlling the first sub-pixel to emit light, and if the brightness to be displayed is not smaller than the set threshold value, controlling the first sub-pixel and the second sub-pixel to emit light simultaneously; the first sub-pixel and the second sub-pixel are used for emitting the set primary light.
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Application publication date: 20220805 |