CN107871775B

CN107871775B - Display panel and display device thereof

Info

Publication number: CN107871775B
Application number: CN201711025646.5A
Authority: CN
Inventors: 周志伟; 李春阳; 徐艺琳; 韩立静
Original assignee: Shanghai Tianma AM OLED Co Ltd
Current assignee: Wuhan Tianma Microelectronics Co Ltd
Priority date: 2017-10-27
Filing date: 2017-10-27
Publication date: 2020-08-21
Anticipated expiration: 2037-10-27
Also published as: CN107871775A

Abstract

The application discloses display panel and display device thereof, display panel include array substrate and packaging substrate, array substrate includes: a substrate base plate; a plurality of pixels arranged in an array on the substrate, wherein the plurality of sub-pixels comprise a plurality of first pixels of a first color, second pixels of a second color and third pixels of a third color, the third pixels comprise at least two third sub-pixels, and the edge of each third pixel is provided with a recess facing the inside of the pixel at the adjacent edge of the two third sub-pixels; a spacer post at least partially located in the recess.

Description

Display panel and display device thereof

Technical Field

The present application relates to the field of display technologies, and in particular, to a display panel and a display device thereof.

Background

The organic light emitting display device is a self-light emitting display device including an Organic Light Emitting Diode (OLED) including a hole injection electrode, an electron injection electrode, and an organic emission layer formed therebetween. The organic light emitting display device emits light when excitons generated due to a combination of holes injected from the hole injection electrode and electrons injected from the electron injection electrode fall from an excited state to a ground state.

The self-emission display device does not require an additional light source. The organic light emitting display device may be driven at a low voltage, and may be lightweight and formed by a thin film technology. In addition, the organic light emitting display device has high quality characteristics such as a wide viewing angle, a large contrast ratio, and a fast response speed, and thus is considered as a next generation display device.

Generally, an organic light emitting display device includes a plurality of pixels for emitting light of different colors to display an image. Here, the pixel refers to a minimum unit of a display image. Gate lines, data lines, power lines such as driving power lines, insulating layers such as pixel defining layers for defining an area or a shape of each pixel, and the like may be positioned between adjacent pixels.

In a typical organic light emitting display device, an organic emission layer for forming pixels is formed by a deposition process using a mask such as a Fine Metal Mask (FMM). A spacing column is formed between part of the pixels, and on one hand, the spacing column is used as a support between the array substrate and the packaging substrate to maintain a gap between the two substrates and keep certain impact strength; on the other hand, when the organic light emitting layer is evaporated using the fine metal mask, the spacer may also contact the fine metal mask as a support of the fine metal mask. If the pixels are formed with a small gap therebetween to ensure a good aperture ratio of the pixels, the spacer area is reduced, the strength of the fine metal mask is reduced, and the reliability of deposition may be reduced. In contrast, if the pixel is formed to have a large gap to improve the reliability of deposition, the spacer area is increased, the strength of the fine metal mask is improved, but the aperture ratio of the pixel may be reduced.

In addition, the formation of the spacers may cause process problems such as contamination, impurities, particles, etc. due to the contact of the spacers with the fine metal mask, thereby reducing the reliability of deposition, and ultimately affecting the display effect and performance of the display panel.

Disclosure of Invention

In view of the above technical problems, the present application provides the following technical solutions.

In a first aspect, the present application provides a display panel, including an array substrate and a package substrate, the array substrate including: a substrate base plate; the pixel structure comprises a substrate, a plurality of pixels and a plurality of pixel groups, wherein the plurality of pixels are arranged on the substrate in an array mode and comprise a plurality of first pixels of a first color, second pixels of a second color and third pixels of a third color, the third pixels comprise at least two third sub-pixels, and the edges of the third pixels are provided with recesses facing the interior of the pixels at the adjacent edges of the two third sub-pixels; and the spacer is at least partially positioned in the recess.

Optionally, a distance between the spacer and the third pixel is smaller than a distance between the spacer and the first pixel, and a distance between the spacer and the third pixel is smaller than a distance between the spacer and the second pixel.

Optionally, the substrate is a pixel defining layer, the pixel defining layer has a plurality of openings, each pixel is located in one opening, and the third pixel includes at least two third sub-pixels located in the same opening.

Optionally, each pixel includes a pixel electrode and a light-emitting layer located on a side of the pixel electrode away from the substrate, the pixel electrodes of at least two third sub-pixels included in the third pixel are separated from each other, and the light-emitting layers of at least two third sub-pixels included in the third pixel are connected together.

Optionally, the spacer is located on a surface of the pixel defining layer facing away from the substrate.

Optionally, the orthographic projection of the bottom of the spacing column on the substrate base plate covers the orthographic projection of the top of the spacing column on the substrate base plate.

Optionally, the third pixel includes two third sub-pixels and two spacing pillars, the two third sub-pixels are both trapezoidal, and the upper bottom edges of the two third sub-pixels are adjacent to each other.

Optionally, the third pixel includes three third sub-pixels and three spacers, and an outer contour of a pattern formed by the three third sub-pixels and the spacers is circular or hexagonal.

Optionally, the third pixel includes four third sub-pixels and four spacers, and an outer contour of a graph formed by the four third sub-pixels and the spacers is a quadrangle.

Optionally, the third pixel includes six third sub-pixels and six spacers, and an outer contour of a pattern formed by the six third sub-pixels and the spacers is circular or hexagonal.

Optionally, the recess is in the shape of a right triangle or an obtuse triangle.

Alternatively, the recess is fan-shaped with its central angle facing the third pixel.

Optionally, the recess is fan-shaped with its arc-shaped edge facing the third pixel.

The application also provides a display device comprising the display panel.

According to the method, the sub-pixels with the same color are adjacent to share the opening of the fine metal mask, so that the manufacturing difficulty of the fine metal mask is reduced, and the evaporation reliability is improved; meanwhile, the spacing columns are arranged in the third sub-pixel area of the shared opening and are recessed towards the inner side of the third sub-pixel, so that the influence of the spacing columns on the first sub-pixel and the second sub-pixel is reduced while the area and the strength of the spacing columns are ensured.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic view of a pixel arrangement provided in the present application;

FIG. 2 is a schematic view of another pixel arrangement provided herein;

FIG. 3 is a schematic view showing another shape of the spacer in the present embodiment;

FIG. 4 is a schematic view showing a shape of a spacer in the present embodiment;

FIG. 5 is a schematic view showing still another shape of the spacer in the present embodiment;

FIG. 6 is a schematic view of another pixel arrangement provided herein;

FIG. 7 is a schematic view of another pixel arrangement provided herein;

FIG. 8 is a schematic view of another pixel arrangement provided herein;

FIG. 9 is a schematic view of a display device provided in the present application;

Detailed Description

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.

The application provides a display panel, including array substrate and packaging substrate, the array substrate includes: a substrate base plate; the pixel array structure comprises a plurality of pixels which are positioned on a substrate and are arranged in an array, wherein the plurality of pixels comprise a plurality of first pixels 11 of a first color, second pixels 12 of a second color and third pixels 13 of a third color, and the third pixels comprise at least two

third sub-pixels

131 and 132. The first pixel 11 includes two

first sub-pixels

111, 112; the second pixel 12 includes two

second sub-pixels

121, 122. The third sub-pixel 132, the first sub-pixel 111 and the second sub-pixel 121 form a pixel unit.

The edge of the third pixel has a depression 14 towards the inside of the pixel at the adjoining edge of the two third sub-pixels; and a spacer 15 at least partially located in the recess 14.

Specifically, as shown in fig. 1, the two

third sub-pixels

131 and 132 are both trapezoidal, and the top sides of the trapezoids are adjacent to or share the top side. The spacing post 15 is triangular, and the recess 14 is a triangular groove matched with the spacing post 15.

Since the spacer is in contact with the fine metal mask during the evaporation process, foreign matters are easily generated at the contact position to affect the light emitting quality of the sub-pixels, and the red and green pixels are more susceptible to the influence of the spacer than the blue pixels. That is, although foreign substances exist in some regions of the pixel region, the luminance reduction due to the foreign substances is more serious in the red and green pixels than in the blue pixel.

In the prior art, on one hand, the pixel arrangement mode is difficult to meet the requirement of high resolution, and on the other hand, the interval pillars are adjacent to the sub-pixels of three colors, so that the interval pillars have higher probability of abnormal light emission and poor display. If the spacers are disposed only between the blue subpixels, the area of the spacers is small, and the impact resistance of the display panel is reduced.

The two

third sub-pixels

131 and 132 share the opening of the fine metal mask, so that the manufacturing difficulty of the fine metal mask is reduced, and the evaporation reliability is improved; meanwhile, the spacing columns are arranged in the third sub-pixel area of the shared opening and are recessed towards the inner side of the third sub-pixel, so that the influence of the spacing columns on the first sub-pixel and the second sub-pixel is reduced while the area and the strength of the spacing columns are ensured.

As shown in fig. 2, the shape of the spacer may be expanded toward the third pixel. Therefore, the shape of the spacing column does not have an acute angle, the difficulty of the manufacturing process of the spacing column is reduced, and the area and the strength of the spacing column are increased.

The width of the recess 14 does not necessarily cover the entire edge of the third pixel, as shown in fig. 3, the recess only occupies a middle part of the edge, and the rest is substantially a strip-shaped part or a rectangular part. The spacing column is formed by splicing a triangular part and a strip-shaped part. Therefore, the spacing columns do not occupy too much area of the third pixels, the larger area of the spacing columns can be still kept, and the influence on the first pixels and the second pixels cannot be expanded.

In addition, the section of the part of the spacer column corresponding to the recess is semicircular, elliptical or in any curve shape, as shown in fig. 4. The arc shape has no acute angle, the transition is smooth, and the process is simpler and more feasible. In addition, the section of the part of the spacing column corresponding to the recess can also be a polygon such as a trapezoid, and the like, as shown in fig. 5.

Fig. 6 is a schematic view of another pixel arrangement provided in the present application. The third pixel is rectangular, grooves are formed in four edges of the third pixel, and each groove corresponds to one triangular spacing column.

Fig. 7 is a schematic view of another pixel arrangement provided in the present application. The third pixel is hexagonal, grooves are formed in six edges of the third pixel, and each groove corresponds to one triangular spacing column. The third pixel includes 6 third sub-pixels; the first pixel includes 6 first sub-pixels; the second pixel includes 6 second sub-pixels. And the adjacent third sub-pixel, the first sub-pixel and the second sub-pixel form a pixel unit.

Fig. 7 is a schematic view of another pixel arrangement provided in the present application. The third pixel is circular, and the edge all has three recesses, and every recess corresponds a fan-shaped interval post. The third pixel includes 3 third sub-pixels; the first pixel includes 3 first sub-pixels; the second pixel includes 3 second sub-pixels. And the adjacent third sub-pixel, the first sub-pixel and the second sub-pixel form a pixel unit.

The present invention also provides a display device 30 including the above display panel. Referring to fig. 9, the display panel 20 provided in the above embodiments of the present application is included. The display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. In the present application, the embodiments of the display device can refer to the embodiments of the display panel, and repeated descriptions are omitted here.

The foregoing description shows and describes several preferred embodiments of the present application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.

Claims

1. A display panel comprises an array substrate and a packaging substrate, and is characterized in that the array substrate comprises:

a substrate base plate;

a plurality of pixels arranged in an array on the substrate, wherein the plurality of pixels comprises a plurality of first pixels of a first color, second pixels of a second color and third pixels of a third color, the third pixels comprise at least two third sub-pixels, and the edges of the third pixels are provided with recesses facing the interior of the pixels at all adjacent edges of the two third sub-pixels;

a spacer post at least partially located in the recess.

2. The display panel of claim 1, wherein the distance between the spacer and the third pixel is less than the distance between the spacer and the first pixel, and the distance between the spacer and the third pixel is less than the distance between the spacer and the second pixel.

3. The display panel of claim 1, wherein the substrate pixel defining layer has a plurality of openings, each of the pixels is located in one of the openings, and the third pixel includes at least two third sub-pixels located in the same opening.

4. The display panel according to claim 3, wherein each of the pixels includes a pixel electrode and a light emitting layer on a side of the pixel electrode facing away from the substrate, the pixel electrodes of at least two third sub-pixels included in the third pixel are spaced apart from each other, and the light emitting layers of at least two third sub-pixels included in the third pixel are connected together.

5. The display panel of claim 3, wherein the spacer pillars are located on a side surface of the pixel defining layer facing away from the substrate base plate.

6. The display panel of claim 1, wherein an orthographic projection of the bottom of the spacer pillar on the substrate base plate overlaps an orthographic projection of the top thereof on the substrate base plate.

7. The display panel according to claim 1, wherein the third pixel comprises two third sub-pixels and two spacers, the two third sub-pixels are each trapezoidal in shape, and upper bottom edges of the two third sub-pixels are adjacent.

8. The display panel according to claim 1, wherein the third pixel comprises three third sub-pixels and three spacers, and an outer contour of a pattern formed by the three third sub-pixels and the spacers is circular or hexagonal.

9. The display panel according to claim 1, wherein the third pixel comprises four third sub-pixels and four spacers, and an outer contour of a pattern formed by the four third sub-pixels and the spacers is a quadrilateral.

10. The display panel according to claim 1, wherein the third pixel comprises six third sub-pixels and six spacers, and an outer contour of a pattern formed by the six third sub-pixels and the spacers is circular or hexagonal.

11. The display panel according to claim 1, wherein the recess shape is a right triangle or an obtuse triangle.

12. The display panel according to claim 1, wherein the depression is fan-shaped and has a central angle directed toward the third pixel.

13. The display panel according to claim 1, wherein the depression is fan-shaped and has an arc-shaped side facing the third pixel.

14. A display device characterized by comprising the display panel according to any one of claims 1 to 13.