CN110967853A

CN110967853A - Display panel, display device and driving method of display panel

Info

Publication number: CN110967853A
Application number: CN201911423575.3A
Authority: CN
Inventors: 薛彦鹏; 储周硕; 关月; 王清娟
Original assignee: Chengdu CEC Panda Display Technology Co Ltd
Current assignee: Chengdu CEC Panda Display Technology Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-04-07

Abstract

The embodiment of the invention provides a display panel, a display device and a driving method of the display panel, wherein the display panel comprises a plurality of bright pixels and a plurality of dark pixels which are arranged in a crossed manner; the bright pixel and the dark pixel each comprise a first sub-pixel of a first color; the first sub-pixel of the bright pixel and the first sub-pixel of the dark pixel have different structural parameters, so that the first sub-pixel of the bright pixel and the first sub-pixel of the dark pixel are driven by the same-intensity driving signal, and the brightness of the first sub-pixel of the bright pixel is higher than that of the first sub-pixel of the dark pixel. The embodiment of the invention can achieve the effect of improving color cast, save the waste resources of the drive IC, reduce the power consumption of the drive IC, improve the response speed of the drive IC, and can easily realize the process under the same color cast improvement condition.

Description

Display panel, display device and driving method of display panel

Technical Field

The embodiment of the invention relates to the technical field of display, in particular to a display panel, a display device and a driving method of the display panel.

Background

Active Thin Film Transistor liquid crystal display panels (TFT-LCDs) have been rapidly developed and widely used in recent years. As for the TFT-LCD display panel currently on the mainstream market, it mainly includes a Twisted Nematic (TN) or Super Twisted Nematic (STN) type, an In-Plane Switching (IPS) type, a Fringe Field Switching (FFS) type, and a Vertical Alignment (VA) type. Among them, the VA-type lcd panel has a very high contrast ratio compared to other types of lcd panels, and is widely used in large-size displays such as lcd tvs. However, since the VA liquid crystal display panel uses vertically rotating liquid crystals, the difference in birefringence of liquid crystal molecules is large, which causes a problem of color shift at a large viewing angle.

In the prior art, a driving signal is usually generated by a driving IC according to a Dual Gamma algorithm and sent to each pixel of an array substrate, so that each pixel presents a bright-dark staggered picture under the driving of the driving signal, which is equivalent to increasing an alignment direction, thereby achieving the purpose of improving color shift.

However, in the above solution, the driver IC needs a large amount of computing resources to perform the processing of the Dual Gamma algorithm, which increases the load of the driver IC and affects the power consumption and response speed of the driver IC.

Disclosure of Invention

Embodiments of the present invention provide a display panel, a display device, and a driving method of a display panel, so as to save a resource waste of a driver IC, reduce power consumption of the driver IC, and improve a response speed of the driver IC.

In a first aspect, an embodiment of the present invention provides a display panel, including:

a plurality of bright pixels and a plurality of dark pixels arranged in a crossing manner;

the bright pixel and the dark pixel each comprise a first sub-pixel of a first color;

the first sub-pixel of the bright pixel and the first sub-pixel of the dark pixel have different structural parameters, so that the brightness of the first sub-pixel of the bright pixel is higher than that of the first sub-pixel of the dark pixel under the drive of the same-intensity drive signal;

wherein the difference of the structural parameters is determined according to a Dual Gamma algorithm.

In one possible design, the first sub-pixel includes a pixel electrode, and the structural parameter is an area of the pixel electrode;

the area of the pixel electrode of the first sub-pixel of the bright pixel is larger than that of the pixel electrode of the first sub-pixel of the dark pixel.

In one possible design, the pixel electrode of the first sub-pixel is rectangular;

the width of the pixel electrode of the first sub-pixel of the bright pixel is equal to the width of the pixel electrode of the first sub-pixel of the dark pixel, and the length of the pixel electrode of the first sub-pixel of the bright pixel is longer than the length of the pixel electrode of the first sub-pixel of the dark pixel;

or,

the length of the pixel electrode of the first sub-pixel of the bright pixel is equal to the length of the pixel electrode of the first sub-pixel of the dark pixel, and the width of the pixel electrode of the first sub-pixel of the bright pixel is larger than the width of the pixel electrode of the first sub-pixel of the dark pixel.

In one possible design, the first sub-pixel includes a pixel electrode; the pixel electrode comprises at least one domain, and each domain comprises at least two strip-shaped electrodes;

the structural parameter is the ratio of a first width of a gap between adjacent strip-shaped electrodes to a second width of each strip-shaped electrode;

the ratio of the bright pixels is greater than the ratio of the dark pixels.

In one possible design, the first width of the bright pixels is greater than the first width of the dark pixels;

and/or the presence of a gas in the gas,

the second width of the bright pixels is less than the second width of the dark pixels.

In one possible design, the first sub-pixel includes an insulating film and a filter film, and a liquid crystal cell is disposed between the insulating film and the filter film; the structural parameter is the liquid crystal box thickness;

the liquid crystal box thickness of the first sub-pixel of the bright pixel is smaller than that of the first sub-pixel of the dark pixel.

In one possible design, the thickness of the insulating film of the first sub-pixel of the bright pixel is greater than the thickness of the insulating film of the first sub-pixel of the dark pixel;

and/or the presence of a gas in the gas,

the thickness of the filter film of the first sub-pixel of the bright pixel is larger than that of the insulating film of the first sub-pixel of the dark pixel.

In one possible design, the first sub-pixel of the bright pixel has an inorganic insulating film of a first thickness and an organic insulating film of a second thickness, and the first sub-pixel of the dark pixel has an inorganic insulating film of a third thickness and an organic insulating film of a fourth thickness.

In one possible design, the first thickness is greater than the third thickness, and the second thickness is equal to the fourth thickness.

In one possible design, the first thickness is greater than or equal to the third thickness, and/or the second thickness is greater than the fourth thickness.

In one possible design, the second thickness is greater than zero and the fourth thickness is equal to zero.

In a second aspect, an embodiment of the present invention provides a display panel, including the array substrate according to the first aspect and various possible designs of the first aspect.

In a third aspect, an embodiment of the present invention provides a display device, including the display panel according to the second aspect.

In a fourth aspect, an embodiment of the present invention provides a method for driving a display panel, including:

acquiring driving signals of the bright pixels and the dark pixels in the display panel;

and controlling the bright pixel and the dark pixel to emit light according to the driving signals, so that the difference value between the transmittance of the first sub-pixel of the bright pixel and the transmittance of the first sub-pixel of the dark pixel under the driving of the driving signals with the same intensity is greater than or equal to zero and smaller than or equal to a preset threshold value.

In the display panel, the display device and the driving method of the display panel provided by the embodiment, the bright pixels and the dark pixels with different brightness are obtained by differently designing the structural parameters of the pixels, and the bright pixels and the dark pixels are arranged in a cross manner, so that the effect of improving color cast can be achieved, the waste resources of the driving IC can be saved, the power consumption of the driving IC is reduced, the response speed of the driving IC is improved, the process requirement on improving the color cast through a multi-domain process under the same color cast improving condition is lower, and the method is easier to realize.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view illustrating a display panel according to an embodiment of the invention;

fig. 2 is a schematic structural diagram of a display panel according to another embodiment of the present invention;

fig. 3 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;

fig. 4 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;

fig. 5 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;

fig. 6 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;

fig. 7 is a schematic structural diagram of a pixel electrode according to yet another embodiment of the present invention;

fig. 8 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;

fig. 9 is a schematic structural diagram of a pixel electrode according to yet another embodiment of the present invention;

fig. 10 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;

fig. 11 is a schematic cross-sectional view illustrating a display panel according to yet another embodiment of the present invention;

fig. 12 is a schematic cross-sectional view illustrating a display panel according to yet another embodiment of the present invention;

fig. 13 is a schematic cross-sectional view illustrating a display panel according to yet another embodiment of the present invention;

fig. 14 is a schematic cross-sectional view illustrating a display panel according to yet another embodiment of the present invention;

fig. 15 is a schematic cross-sectional view illustrating a display panel according to yet another embodiment of the present invention;

FIG. 16 is a schematic view of VT-Curve curves for bright and dark pixels according to yet another embodiment of the present invention;

FIG. 17 is a schematic view of VT-Curve curves for bright and dark pixels according to yet another embodiment of the present invention;

fig. 18 is a VT-Curve diagram of a bright pixel and a dark pixel according to yet another embodiment of the present invention.

Reference numerals:

101: an upper glass substrate; 102: a lower glass substrate; 103: an insulating film; 104: a pixel electrode; 105: a liquid crystal layer; 106: a light filtering film; 1031: an organic insulating film; 1032: an inorganic insulating film.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 invention.

Fig. 1 is a schematic cross-sectional view of a display panel according to an embodiment of the invention. Fig. 2 is a schematic structural diagram of a display panel according to another embodiment of the present invention. As shown in fig. 1, the display panel includes an upper glass substrate 101, a lower glass substrate 102, and an insulating film 103, a pixel electrode 104, a liquid crystal layer 105, and a filter film 106, which are provided between the upper glass substrate 101 and the lower glass substrate 102 in this order from top to bottom. As shown in fig. 2, the pixel electrodes 104 disposed on the lower glass substrate 102 are arranged in rows and columns. Each pixel may include sub-pixels of a plurality of colors, for example, may include a blue sub-pixel B, a red sub-pixel R, and a green sub-pixel G. Alternatively, the color sub-pixels included in each pixel are arranged in the same order. As shown in fig. 2, each column of pixels includes a column of blue subpixels B, a column of red subpixels R, and a column of green subpixels from left to right.

In a specific implementation, the liquid crystal layer 105 is driven to rotate by a driving signal generated by the driving IC; the backlight emitted upward by the backlight assembly disposed below the lower glass substrate 102 is refracted by the rotated liquid crystal layer 105 to generate a corresponding picture.

Therefore, in the process, after the liquid crystal molecules of the liquid crystal layer 105 adjust the rotation direction, the transmittance of the backlight can be changed, and different pictures can be displayed. However, due to the influence of liquid crystal parameters or the increase of the number of pixels, a problem of poor side-viewing effect, i.e., color shift, often occurs, and in the prior art, a scheme may drive each pixel in the display panel by generating a bright-area driving signal and a dark-area driving signal according to a dual gamma algorithm through a driving IC. In order to achieve the target value (for example, 2.2) of the front viewing angle Gamma curve and the target value (for example, 1.2) of the side viewing angle Gamma curve, but in the process, the driving IC needs a large amount of computing resources to perform the processing of the Dual Gamma algorithm, the load of the driving IC is increased, and the power consumption and the response speed of the driving IC are affected; alternatively, in a display panel employing multi-domain technology, the color shift problem can be changed by implementing more partitions. For example, the color shift can be improved by using 2-domain, 4-domain, and 8-domain partitions. The color shift is improved to a better extent as the division is larger, but as the resolution of the display panel is increased, the size of each pixel is smaller, and in this case, the process implementation of 8 domains is more difficult. Accordingly, the embodiment of the invention provides a display panel, so as to save the waste resources of the driver IC, reduce the power consumption of the driver IC, improve the response speed of the driver IC, and enable the process to be more easily realized under the same color shift improvement condition.

In the present embodiment, by changing the structural parameters of the pixels, bright pixels and dark pixels that can drive the pixels exhibiting a difference between bright and dark under the same driving signal are obtained. In addition, in the embodiment, the bright pixels and the dark pixels are alternately arranged, so that the effect of improving color cast can be achieved, the waste resources of the driving IC can be saved, the power consumption of the driving IC is reduced, the response speed of the driving IC is improved, and the process can be easily realized under the same color cast improvement condition.

The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

Fig. 3 is a schematic structural diagram of a display panel according to another embodiment of the present invention. As shown in fig. 3, the display panel includes:

a plurality of bright pixels and a plurality of dark pixels arranged in a cross.

The bright pixel and the dark pixel each include a first sub-pixel of a first color.

The first sub-pixel of the bright pixel and the first sub-pixel of the dark pixel have different structural parameters, so that the first sub-pixel of the bright pixel and the first sub-pixel of the dark pixel are driven by the same-intensity driving signal, and the brightness of the first sub-pixel of the bright pixel is higher than that of the first sub-pixel of the dark pixel.

In this embodiment, each of the bright pixels and the dark pixels may include a plurality of color sub-pixels, such as a blue sub-pixel B, a red sub-pixel R, and a green sub-pixel G. When performing color shift adjustment, adjustment may be performed only for one of the plurality of color sub-pixels, or may be performed for a plurality of color sub-pixels.

Specifically, as shown in fig. 3, the display panel includes three color sub-pixels of BRG, and color cast adjustment is performed on the BRG. So that bright and dark pixels alternate.

Optionally, there are various ways of cross arrangement of the bright pixels and the dark pixels, and in an implementation manner, as shown in fig. 3, the bright pixels and the dark pixels are arranged in the same row in sequence, that is, the upper, lower, left and right sides of one bright pixel are both the dark pixels, and the upper, lower, left and right sides of one dark pixel are both the bright pixels. In another implementation, two bright pixels, two dark pixels may be arranged in the same row in that order. It is also possible to arrange two bright pixels, one dark pixel, two bright pixels, one dark pixel in that order. That is, if the alternately appearing bright pixels and dark pixels are grouped, the number of bright pixels included in the bright pixel group and the number of dark pixels included in the dark pixel group may be in various combinations, the same, or different. This embodiment is not limited to this.

Alternatively, the structural parameter of the first sub-pixel of the bright pixel or the dark pixel refers to a structural parameter related to the light transmittance of the pixel, and may be, for example, the area of the pixel electrode 104, the thickness of the liquid crystal cell caused by the film thickness of the pixel, or the width of each branch electrode of the pixel electrode 104. It should be noted that the brightness of the first sub-pixel of the bright pixel may be higher than the brightness of the first sub-pixel of the dark pixel by adjusting one structural parameter, for example, only one structural parameter is used for the area of the pixel electrode 104, different designs of the structural parameters of the first sub-pixel of the bright pixel and the first sub-pixel of the dark pixel are performed, the brightness of the first sub-pixel of the bright pixel may be higher than the brightness of the first sub-pixel of the dark pixel by adjusting multiple structural parameters, for example, different designs of the structural parameters of the first sub-pixel of the bright pixel and the first sub-pixel of the dark pixel may be performed simultaneously for the area of the pixel electrode 104 and the film thickness of the pixel.

The display panel provided by the embodiment obtains the bright pixels and the dark pixels with different brightness by carrying out different designs on the structural parameters of the pixels, and the bright pixels and the dark pixels are arranged in a cross manner, so that the effect of improving color cast can be achieved, the waste resources of the drive IC can be saved, the power consumption of the drive IC is reduced, the response speed of the drive IC is improved, the process requirement for improving the color cast through a multi-domain process under the same color cast improvement condition is lower, and the implementation is easier.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a display panel according to another embodiment of the present invention, as shown in fig. 4, the luminance of a pixel is related to the area of the ITO film of the pixel electrode 104, and the luminance difference between two pixels can be adjusted by adjusting the difference between the areas of the pixel electrodes 104 of the two pixels. Obtaining a bright pixel and a dark pixel by setting the areas of the pixel electrodes 104 of the adjacent pixels to different values, specifically, in this embodiment, the first sub-pixel includes the pixel electrode 104, and the structural parameter is the area of the pixel electrode 104;

the area of the pixel electrode 104 of the first sub-pixel of the bright pixel is larger than the area of the pixel electrode 104 of the first sub-pixel of the dark pixel.

Alternatively, the area of the pixel electrode 104 may be adjusted in various ways. Referring to fig. 5 and fig. 6, in a possible implementation manner, fig. 5 is a schematic structural diagram of a display panel according to still another embodiment of the present invention. As shown in fig. 5, the width of the pixel electrode 104 can be kept equal, and the area can be adjusted by designing different lengths. Specifically, the pixel electrode 104 of the first sub-pixel is rectangular; the width of the pixel electrode 104 of the first sub-pixel of the bright pixel is equal to the width of the pixel electrode 104 of the first sub-pixel of the dark pixel, and the length of the pixel electrode 104 of the first sub-pixel of the bright pixel is greater than the length of the pixel electrode 104 of the first sub-pixel of the dark pixel.

In another possible implementation manner, fig. 6 is a schematic structural diagram of a display panel according to another embodiment of the present invention. As shown in fig. 6, the pixel electrode 104 can be designed to have the same length and different widths to adjust the area. Specifically, the length of the pixel electrode 104 of the first sub-pixel of the bright pixel is equal to the length of the pixel electrode 104 of the first sub-pixel of the dark pixel, and the width of the pixel electrode 104 of the first sub-pixel of the bright pixel is larger than the width of the pixel electrode 104 of the first sub-pixel of the dark pixel.

By designing the length or width of the pixel electrode 104 of only the bright pixel and the dark pixel with different sizes, the final area difference is easier to control, which is beneficial to process implementation.

Specifically, referring to fig. 16, fig. 16 is a schematic view of VT-Curve curves of a bright pixel and a dark pixel according to still another embodiment of the present invention, as shown in fig. 16, voltage-transmittance curves of the bright pixel and the dark pixel have a certain difference for different areas of the pixel electrode 104 on the display panel, so that the transmittances of the bright pixel and the dark pixel are different, that is, the luminance of the bright pixel is greater than the luminance of the dark pixel under the same driving signal.

In this embodiment, the areas of the pixel electrodes 104 of the bright pixel and the dark pixel are designed differently, so that the luminance of the bright pixel is higher than that of the dark pixel under the driving of the driving signal with the same intensity. And the bright pixels and the dark pixels are arranged in a cross manner, so that the effect of improving color cast can be achieved, the waste resources of the driving IC can be saved, the power consumption of the driving IC is reduced, the response speed of the driving IC is improved, the process requirement on the embodiment of improving color cast by a multi-domain process is lower under the same color cast improvement condition, and the implementation is easier.

In one embodiment, the structural parameters of the bright pixel and the dark pixel can be designed differently by adjusting the width (space) of the gap between the branch electrodes in the pixel electrode and/or the width (slit) of each branch electrode, so that the bright pixel and the dark pixel can present different brightness. Specifically, in this embodiment, the first sub-pixel includes a pixel electrode; the pixel electrode comprises at least one domain, and each domain comprises at least two strip-shaped electrodes; the structural parameter is the ratio of a first width (space) of a gap between adjacent strip-shaped electrodes to a second width (slit) of each strip-shaped electrode; the ratio of the bright pixels is greater than the ratio of the dark pixels.

Optionally, the first width of the bright pixels is greater than the first width of the dark pixels; and/or the second width of the bright pixels is less than the second width of the dark pixels.

In practical application, the pixel electrodes of the bright pixels and the dark pixels can be designed by only adjusting the Space or the Slit and changing the ratio of the Space to the Slit, that is, the ratio of the first width of the gap between the adjacent strip electrodes to the second width of each strip electrode. The design of the pixel electrodes of the bright pixels and the dark pixels can be performed by adjusting the Space or the Slit at the same time.

Referring to fig. 7 and 8, fig. 7 is a schematic structural diagram of a pixel electrode according to another embodiment of the present invention, and fig. 8 is a schematic structural diagram of a display panel according to another embodiment of the present invention. As shown in fig. 7, the left side is the pixel electrode of the first pixel of the bright pixel having a plurality of partitions, the right side is the pixel electrode of the first pixel of the dark pixel having a plurality of partitions, the pixel electrode of the first pixel of the bright pixel has a slit smaller than the slit of the dark pixel compared with the pixel electrode of the first pixel of the dark pixel, the space of the first pixel is larger than the space of the dark pixel, and therefore the ratio of the space to the slit of the first pixel is larger than the ratio of the space to the slit of the dark pixel. Therefore, under the drive of the same signal, the brightness of the bright pixel of the display panel based on the design is larger than that of the dark pixel, and the effect of improving color cast can be achieved.

Referring to fig. 9 and 10, fig. 9 is a schematic structural diagram of a pixel electrode according to another embodiment of the present invention, and fig. 10 is a schematic structural diagram of a display panel according to another embodiment of the present invention. As shown in fig. 9, the left side is the pixel electrode of the first pixel having a bright pixel of one partition, and the right side is the pixel electrode of the first pixel having a dark pixel of one partition, the slit of the former is smaller than the slit of the latter, the space of the former is larger than the space of the latter, so the ratio of the space to the slit of the former is larger than the ratio of the space to the slit of the latter. Therefore, under the drive of the same signal, the brightness of the bright pixel of the display panel based on the design is larger than that of the dark pixel, and the effect of improving color cast can be achieved.

Specifically, referring to fig. 17, fig. 17 is a schematic view of VT-Curve curves of a bright pixel and a dark pixel according to still another embodiment of the present invention, as shown in fig. 17, voltage-transmittance curves of the bright pixel and the dark pixel have a certain difference for different slit and space of the pixel electrode 104 on the display panel, so that the transmittances of the bright pixel and the dark pixel are different, that is, the luminance of the bright pixel is greater than the luminance of the dark pixel under the same driving signal. Moreover, the bright pixels and the dark pixels are alternately arranged, so that the effect of improving color cast can be achieved, the waste resources of the driving IC can be saved, the power consumption of the driving IC is reduced, the response speed of the driving IC is improved, and the process can be more easily realized under the same color cast improvement condition.

Fig. 11 is a schematic cross-sectional view of a display panel according to still another embodiment of the present invention, and as shown in fig. 11, the first sub-pixel includes an insulating film 103 and a filter 106, and a liquid crystal cell is disposed between the insulating film 103 and the filter 106; the structural parameter is the liquid crystal box thickness; the liquid crystal box thickness of the first sub-pixel of the bright pixel is smaller than that of the first sub-pixel of the dark pixel. The thickness of the insulating film 103 of the first sub-pixel of the bright pixel is greater than the thickness of the insulating film 103 of the first sub-pixel of the dark pixel; and/or the thickness of the filter film 106 of the first sub-pixel of the bright pixel is larger than that of the insulating film 103 of the first sub-pixel of the dark pixel. In this embodiment, different liquid crystal cell thicknesses are designed for the bright pixels and the dark pixels, so that the light transmittance of the bright pixels is different from that of the dark pixels, and the brightness of the bright pixels is greater than that of the dark pixels under the control of the same driving signal. The color cast improving method can achieve the effect of improving color cast, save the waste resources of the drive IC, reduce the power consumption of the drive IC, improve the response speed of the drive IC, and can be easier to realize under the same color cast improving condition.

Specifically, if the thickness of the filter film 106 is c, the thickness of the insulating film 103 is d, and the distance between the upper glass substrate 101 and the lower glass substrate 102 is b, the cell thickness a is b-c-d. Therefore, different liquid crystal box thicknesses can be designed for the bright pixel and the dark pixel respectively by adjusting c and d, so that the brightness of the bright pixel is higher than that of the dark pixel under the drive of the same drive signal.

Referring to fig. 12, fig. 12 is a schematic cross-sectional structure diagram of a display panel according to still another embodiment of the present invention, and as shown in fig. 12, it is assumed that a blue sub-pixel B, a red sub-pixel R, and a green sub-pixel G of a bright pixel, a blue sub-pixel B, a red sub-pixel R, and a green sub-pixel G of a dark pixel, and a blue sub-pixel B of another bright pixel are sequentially arranged from left to right. In this embodiment, the thickness c of the filter 106 of each sub-pixel of the bright pixel is set to be greater than the thickness c of the filter 106 of each sub-pixel of the dark pixel, so that the cell thickness a of the bright pixel can be smaller than the cell thickness a' of the dark pixel. So that the luminance of the bright pixels is higher than the luminance of the dark pixels under the drive of the same drive signal. The effect of improving color cast can be achieved.

Referring to fig. 13, fig. 13 is a schematic cross-sectional structure diagram of a display panel according to still another embodiment of the present invention, and as shown in fig. 13, in this embodiment, the first sub-pixel of the bright pixel has an inorganic insulating film 10321032 with a first thickness and an organic insulating film 10311031 with a second thickness, and the first sub-pixel of the dark pixel has an inorganic insulating film 1032 with a third thickness and an organic insulating film 1031 with a fourth thickness. The sum of the first thickness and the second thickness is the total thickness d of the insulating film 103.

In this embodiment, the inorganic insulating film 1032 may be a PAS insulating film 103, and the organic insulating film 1031 may be a JAS insulating film 103.

Alternatively, in one specific embodiment, only the thickness of the inorganic insulating film 1032 may be adjusted, as shown in fig. 14, the following design may be made: the first thickness is greater than the third thickness, and the second thickness is equal to the fourth thickness. Therefore, d of the bright pixel is larger than d of the dark pixel, so that the thickness of the liquid crystal box of the bright pixel is smaller than that of the liquid crystal box of the dark pixel. So that the luminance of the bright pixels is higher than the luminance of the dark pixels under the drive of the same drive signal. The effect of improving color cast can be achieved.

In a specific implementation process, the exposure amount of the inorganic insulating film 1032 at different pixel positions can be adjusted by a Halftone technique, so that the first thickness of the inorganic insulating film 1032 corresponding to a bright pixel is greater than the third thickness of the inorganic insulating film 1032 corresponding to a dark pixel. Therefore, the thickness of the liquid crystal box of the bright pixel is smaller than that of the liquid crystal box of the dark pixel, so that the transmittance of the bright pixel is larger than that of the dark pixel, and the brightness of the bright pixel is larger than that of the dark pixel under the drive of the same drive signal. Therefore, the effect of improving color cast can be achieved, the waste resource of the drive IC can be saved, the power consumption of the drive IC is reduced, the response speed of the drive IC is improved, and the process can be more easily realized under the same color cast improvement condition.

Alternatively, in one specific embodiment, the thickness of the inorganic insulating film 1032 and the thickness of the organic insulating film 1031 may be adjusted at the same time, and the following design may be made: the first thickness is greater than or equal to the third thickness, and/or the second thickness is greater than the fourth thickness. Therefore, the thickness of the liquid crystal box of the bright pixel is smaller than that of the liquid crystal box of the dark pixel, so that the transmittance of the bright pixel is larger than that of the dark pixel, and the brightness of the bright pixel is larger than that of the dark pixel under the drive of the same drive signal. Therefore, the effect of improving color cast can be achieved, the waste resource of the drive IC can be saved, the power consumption of the drive IC is reduced, the response speed of the drive IC is improved, and the process can be more easily realized under the same color cast improvement condition.

Alternatively, in a specific embodiment, the total thickness d of the insulating film 103 may be changed by setting the presence or absence of the organic insulating film 1031, as shown in fig. 15, the following design may be made: the second thickness is greater than zero and the fourth thickness is equal to zero.

The second thickness of the organic insulating film 1031 corresponding to the bright pixel is made larger than the fourth thickness of the organic insulating film 1031 corresponding to the dark pixel by providing the JAS insulating film 103 for the bright pixel and not providing the JAS insulating film 103 for the dark pixel. Therefore, the thickness of the liquid crystal box of the bright pixel is smaller than that of the liquid crystal box of the dark pixel, so that the transmittance of the bright pixel is larger than that of the dark pixel, and the brightness of the bright pixel is larger than that of the dark pixel under the drive of the same drive signal. Therefore, the effect of improving color cast can be achieved, the waste resource of the drive IC can be saved, the power consumption of the drive IC is reduced, the response speed of the drive IC is improved, and the process can be more easily realized under the same color cast improvement condition.

Specifically, referring to fig. 18, fig. 18 is a VT-Curve diagram of a bright pixel and a dark pixel according to still another embodiment of the present invention, as shown in fig. 18, voltage-transmittance curves of the bright pixel and the dark pixel have a certain difference with respect to different thicknesses of a liquid crystal cell on a display panel, so that the transmittances of the bright pixel and the dark pixel are different, that is, the luminance of the bright pixel is greater than the luminance of the dark pixel under the same driving signal. Moreover, the bright pixels and the dark pixels are alternately arranged, so that the effect of improving color cast can be achieved, the waste resources of the driving IC can be saved, the power consumption of the driving IC is reduced, the response speed of the driving IC is improved, and the process can be more easily realized under the same color cast improvement condition.

The embodiment of the invention also provides a display device which comprises the display panel.

In the display device provided by this embodiment, a plurality of bright pixels and a plurality of dark pixels in the display panel are arranged in a crossed manner, and different pixel structures are designed for sub-pixels of the bright pixels and the dark pixels, that is, different structural parameter values are set, so that the luminance of the bright pixels is greater than that of the dark pixels under the driving of the same driving signal. The color cast improving method can achieve the effect of improving color cast, save the waste resources of the drive IC, reduce the power consumption of the drive IC, improve the response speed of the drive IC, and can be easier to realize under the same color cast improving condition.

An embodiment of the present invention further provides a driving method of a display panel, which is applied to the display panel described in the above embodiments, for example, the embodiments shown in fig. 3 to 18, and the method includes:

step 1901, obtaining driving signals of the bright pixels and the dark pixels in the display panel.

Step 1902, controlling the bright pixel and the dark pixel to emit light according to the driving signal, so that a difference between a transmittance of the first sub-pixel of the bright pixel and a transmittance of the first sub-pixel of the dark pixel under the driving of the driving signal with the same intensity is greater than or equal to zero and less than or equal to a preset threshold.

Specifically, the display panel includes a plurality of bright pixels and a plurality of dark pixels having different pixel structures, and the bright pixels and the dark pixels emit light under the driving of the driving signals after the display panel receives the driving signals transmitted by the driving IC. Due to the fact that the structural parameters of the first sub-pixel of the bright pixel and the first sub-pixel of the dark pixel are different, a difference value between 0 and x is formed between the transmittance of the first sub-pixel of the bright pixel and the transmittance of the first sub-pixel of the dark pixel under the drive of the drive signal with the same intensity, x is a natural number larger than 0, the value of x can be set according to the influence factors of a specific color cast problem, optionally, under the condition of the same transmittance, the difference value of the drive voltage of the bright pixel and the drive voltage of the dark pixel can be 0.5V, and the value of x can be determined according to the difference value of 0.5V. That is, the bright pixels and the dark pixels of the display panel form different voltage-transmittance curves (V-T curves), which can be seen in fig. 16-18. The difference of the V-T curves shown in fig. 16 is due to the fact that the area of the pixel electrode of the bright pixel and the area of the pixel electrode of the dark pixel are designed to have different sizes, the difference of the V-T curves shown in fig. 17 is due to the fact that the pixel electrode of the bright pixel and the pixel electrode of the dark pixel have different ratios of slit to space, and the difference of the V-T curves shown in fig. 18 is due to the fact that the cell thickness of the bright pixel and the cell thickness of the dark pixel have different sizes.

In the driving method of the display panel provided by this embodiment, the driving signal is input to the bright pixel and the dark pixel with different structural parameters, so that the bright pixel and the dark pixel with different structural parameters form different V-T curves, thereby achieving the effect of improving color shift, saving the wasted resources of the driving IC, reducing the power consumption of the driving IC, increasing the response speed of the driving IC, and making the process easier to implement under the same color shift improvement condition.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description above, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display panel, comprising:

2. The display panel of claim 1, wherein the first sub-pixel comprises a pixel electrode, and the structural parameter is an area of the pixel electrode;

3. The display panel according to claim 2, wherein the pixel electrode of the first sub-pixel is rectangular;

or,

4. The display panel according to claim 1, wherein the first sub-pixel comprises a pixel electrode; the pixel electrode comprises at least one domain, and each domain comprises at least two strip-shaped electrodes;

the ratio of the bright pixels is greater than the ratio of the dark pixels.

5. The display panel according to claim 4,

the first width of the bright pixels is greater than the first width of the dark pixels;

and/or the presence of a gas in the gas,

6. The display panel according to claim 1, wherein the first sub-pixel comprises an insulating film and a filter film, and a liquid crystal cell is provided between the insulating film and the filter film; the structural parameter is the liquid crystal box thickness;

7. The display panel according to claim 6,

the thickness of the insulating film of the first sub-pixel of the bright pixel is larger than that of the insulating film of the first sub-pixel of the dark pixel;

and/or the presence of a gas in the gas,

8. The display panel according to claim 7, wherein the first sub-pixel of the bright pixel has an inorganic insulating film of a first thickness and an organic insulating film of a second thickness, and the first sub-pixel of the dark pixel has an inorganic insulating film of a third thickness and an organic insulating film of a fourth thickness.

9. The display panel according to claim 8, wherein the first thickness is greater than the third thickness, and the second thickness is equal to the fourth thickness.

10. The display panel according to claim 8, wherein the first thickness is equal to or greater than the third thickness, and/or wherein the second thickness is greater than the fourth thickness.

11. The display panel according to claim 9 or 10, wherein the second thickness is greater than zero and the fourth thickness is equal to zero.

12. A display device characterized by comprising the display panel according to claim 11.

13. A driving method of a display panel, applied to the display panel according to any one of claims 1 to 11, comprising: