CN110581145B

CN110581145B - Display screen and display device

Info

Publication number: CN110581145B
Application number: CN201810595984.0A
Authority: CN
Inventors: 张丽
Original assignee: Yungu Guan Technology Co Ltd
Current assignee: Yungu Guan Technology Co Ltd
Priority date: 2018-06-11
Filing date: 2018-06-11
Publication date: 2022-08-16
Anticipated expiration: 2038-06-11
Also published as: CN110581145A

Abstract

The invention relates to a display screen and a display device, wherein a supporting column is arranged in a pixel unit, the length direction of the supporting column is not parallel to the side edge of any sub-pixel in the pixel unit, and the supporting column can be obliquely arranged in the pixel unit relative to each sub-pixel, so that the closest distance between the supporting column and one of the sub-pixels is increased. This support column's setting can be through the nearest distance of increase support column and one of them subpixel to on being difficult for the coating by vaporization to the support column when making this subpixel coating by vaporization, behind avoiding thicker subpixel coating by vaporization to the support column, the support column receives the apron extrusion force inhomogeneous, thereby suffers the damage.

Description

Display screen and display device

Technical Field

The present invention relates to display technologies, and in particular, to a display screen and a display device.

Background

The display screen is usually packaged by sealing the cover plate and the glass substrate with the display layer deposited thereon with a packaging material, so that external water and oxygen molecules cannot enter the display screen.

Conventionally, after a pixel defining layer and supporting posts provided on the pixel defining layer are formed on a glass substrate, a mask plate is generally used to evaporate light-emitting sub-pixels in recesses formed in the pixel defining layer. The evaporation thicknesses of the light-emitting sub-pixels with different colors are different.

The applicant found in the course of implementing the conventional technique that: traditional display screen manufacturing technology, when coating by vaporization pixel, because the precision of mask piece probably makes pixel evaporate on the support column to lead to evaporating to thick pixel's support column to receive the apron extrusion to damage easily.

Disclosure of Invention

Therefore, it is necessary to provide a display panel and a display device, which are directed to the problem that the supporting pillars of the thick light-emitting pixels are easily damaged by the cover plate.

A display screen comprises a plurality of pixel units which are arranged in an array; each pixel unit is formed by surrounding at least three sub-pixels with different colors; at least one supporting column is arranged in each pixel unit, and the length direction of each supporting column is not parallel to the side edge of any sub-pixel in the corresponding pixel unit.

In the display screen, the supporting columns are arranged in the pixel units, and the length directions of the supporting columns are not parallel to the side edges of any sub-pixels in the pixel units, so that the supporting columns can be obliquely arranged in the pixel units relative to the sub-pixels, and the closest distance between the supporting columns and one of the sub-pixels is increased. This support column's setting can be through the nearest distance of increase support column and one of them subpixel to on being difficult for the coating by vaporization to the support column when making this subpixel coating by vaporization, behind avoiding thicker subpixel coating by vaporization to the support column, the support column receives the apron extrusion force inhomogeneous, thereby suffers the damage.

In one embodiment, each pixel unit of the display screen comprises a first sub-pixel, a second sub-pixel and a third sub-pixel; the support column has a first end and a second end along the length direction of the support column; the first end of the supporting column is spaced from the first sub-pixel by a distance d1 in the preset direction; the distance between the second end of the supporting column and the second sub-pixel is d 2; the first end of the support post is spaced from the third sub-pixel by a distance d3, wherein d3> d1, d3> d 2; the predetermined direction is any one of a row direction or a column direction of the array.

In one embodiment, d1 ═ d2 in the display screen.

In one embodiment, the included angle between the length direction of the supporting column of the display screen and the preset direction is 20-70 degrees.

In one embodiment, a vertical projection of the support column of the display screen in the predetermined direction does not overlap with the third sub-pixel.

Above-mentioned display screen, the position of projection through the support column in the predetermined direction is injectd, can make the support column keep away from the third sub-pixel as far as possible to when making the coating by vaporization, the thicker third sub-pixel of rete can not evaporate by vaporization to the support column. Thereby it is inhomogeneous to avoid the support column to receive the apron extrusion force to suffer the damage.

In one embodiment, in the display screen, three sub-pixels located in the same pixel unit are respectively arranged at three vertexes of an isosceles triangle, wherein the first sub-pixel is located at a top angle of the isosceles triangle, and the second sub-pixel and the third sub-pixel are respectively located at two bottom angles of the isosceles triangle; and the middle line of the isosceles triangle is parallel to one of the predetermined directions.

In one embodiment, in the display screen, the pixel units are repeatedly arranged along at least one predetermined direction; or, along a direction perpendicular to one of the predetermined directions, the vertex angle and the base of the triangle in two adjacent pixel units are arranged oppositely.

In one embodiment, in the display screen, the first sub-pixel is a blue sub-pixel, and the second sub-pixel is a green sub-pixel; the third sub-pixel is a red sub-pixel.

In one embodiment, in the display screen, the opening area of the first sub-pixel is larger than the opening areas of the second sub-pixel and the third sub-pixel.

A display device comprising a display screen as described in any one of the above embodiments.

The display device includes the display screen in any of the embodiments, the support columns are disposed in the pixel units of the display screen, and the length directions of the support columns are not parallel to the side edges of any sub-pixels in the pixel units, so that the support columns can be obliquely disposed in the pixel units relative to the sub-pixels, and the closest distance between the support column and one of the sub-pixels is increased. This support column's setting can be through the nearest distance of increase support column and one of them subpixel to on being difficult for the coating by vaporization to the support column when making this subpixel coating by vaporization, behind avoiding thicker subpixel coating by vaporization to the support column, the support column receives the apron extrusion force inhomogeneous, thereby suffers the damage.

Drawings

Fig. 1 is a schematic diagram of a background art in one embodiment.

FIG. 2 is a schematic diagram of a position relationship between a light emitting sub-pixel and a supporting pillar according to an embodiment of the present application.

FIG. 3 is a schematic diagram of a location relationship of a light emitting sub-pixel in an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a display screen in an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a substrate and a pixel defining layer according to an embodiment of the present application.

Wherein the meanings represented by the reference numerals are as follows:

100. a substrate;

200. a pixel defining layer;

202. a pit;

204. a flat portion;

300. a pixel unit;

302. a first sub-pixel;

304. a second sub-pixel;

306. a third sub-pixel;

400. a support pillar;

410. a first end;

420. a second end;

500. packaging the cover plate;

510. a sealing frame;

600. and (5) a mask plate.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will recognize without departing from the spirit and scope of the present invention.

As shown in fig. 1, typically, after a pixel defining layer 200 for defining a pixel unit 300 is formed on a substrate 100, a supporting column 400 is further provided on the pixel defining layer 200. After the substrate 100 and the package cover 500 are packaged, the supporting pillars 400 are used to support the package cover 500, so that the package cover 500 is less deformed when being pressed by an external force, and the pixel units 300 disposed between the package cover 500 and the substrate 100 are not damaged. Each pixel cell 300 includes at least an R (Red ) sub-pixel 306, a B (Blue ) sub-pixel 302, and a G (Green ) sub-pixel 304. Each light-emitting sub-pixel is provided in a recess 202 in the pixel defining layer 200 by vapor deposition or the like.

When each sub-pixel is separately evaporated in the recess 202 of the pixel defining layer 200 by evaporation, the mask plate 600 is usually used to cover the recesses 202 to be deposited by other sub-pixels. As shown in fig. 1, when the R sub-pixel 306 is evaporated, the mask plate 600 has an opening only for the pit 202 to be evaporated in the R sub-pixel 306, and covers the pits 202 to be evaporated in the B sub-pixel 302 and the G sub-pixel 304. Since the openings of the mask plate 600 are generally larger than the openings of the recesses 202 of the pixel defining layer 200, the sub-pixels are deposited on the supporting pillars 400 near the sub-pixels when the sub-pixels are evaporated. In addition, since the thickness of the R sub-pixel 306 is greater than that of the B sub-pixel 302 and the G sub-pixel 304 during evaporation, the portion of the support pillar 400 where the R sub-pixel 302 is evaporated is higher than other portions after evaporation, so that the support pillar 400 is stressed unevenly when the package cover plate 500 is pressed against the substrate 100, and the support pillar 400 near the R pixel is easily damaged.

In the following embodiments of the present application, the first sub-pixel refers to a blue sub-pixel, the second sub-pixel refers to a green sub-pixel, and the third sub-pixel refers to a red sub-pixel.

The application provides a display screen, as shown in fig. 2, including being a plurality of pixel unit that the array was arranged, and be equipped with at least one support column in every pixel unit.

Specifically, in the embodiment shown in fig. 2, the pixel unit 300 is surrounded by at least three sub-pixels with different colors, namely a first sub-pixel 302, a second sub-pixel 304 and a third sub-pixel 306. One display screen includes a plurality of pixel units 300 arranged in an array. Wherein a plurality of the fingers are one above the other.

The supporting pillars 400 are disposed in the pixel unit 300 and between the first sub-pixel 302, the second sub-pixel 304, and the third sub-pixel 306. The top view of the support posts 400 should be elongated as shown in figure 2. At least one supporting pillar 400 is disposed in each pixel unit 300, and the length direction of the supporting pillar 400 is not parallel to the side of any sub-pixel in the pixel unit 300 where the supporting pillar 400 is disposed. The longitudinal direction of the support columns 400 means the extending direction of the longest side of the elongated support columns 400.

More specifically, in the embodiment shown in fig. 2, a display screen includes a plurality of pixel cells 300. The pixel unit 300 is formed by a first sub-pixel 302, a second sub-pixel 304 and a third sub-pixel 306, which are surrounded by sub-pixels with different colors. Each pixel unit 300 is provided with a support pillar 400, and the top view structure of the support pillar 400 is a strip shape. In a top view, the longest side of the elongated support pillars 400 extends in a direction that is not parallel to the side of any sub-pixel. The support posts 400 are positioned such that the sub-pixels are within the pixel unit 300 as far as possible from one of the sub-pixels.

In the display panel, the supporting column 400 is disposed in the pixel unit 300, and the length direction of the supporting column 400 is not parallel to the side of any sub-pixel in the pixel unit 300, so that the supporting column 400 can be obliquely disposed in the pixel unit 300 relative to each sub-pixel, thereby increasing the closest distance between the supporting column 400 and one of the sub-pixels. This support column 400's setting can be through the nearest distance of increase support column 400 and one of them subpixel to difficult coating by vaporization is to support column 400 during making this subpixel coating by vaporization, and from avoiding thick subpixel coating by vaporization to support column 400 after, support column 400 receives the apron extrusion force inhomogeneous, thereby suffers the damage.

In one embodiment, in the display panel, each pixel unit 300 includes a first sub-pixel 302, a second sub-pixel 304, and a third sub-pixel 306. Wherein each support column 400 has a first end 410 and a second end 420 along the length of the support column 400. In the predetermined direction, the distance between the first end 410 of the support pillar 400 and the first sub-pixel 302 is d1, the distance between the second end 420 of the support pillar 400 and the second sub-pixel 304 is d2, and the distance between the first end 410 of the support pillar 400 and the third sub-pixel 306 is d3, wherein d3> d1 and d3> d 2. The predetermined direction is either a row direction or a column direction in the array direction.

Specifically, as shown in fig. 2, one display screen includes a plurality of pixel units 300. One pixel unit 300 is formed by three sub-pixels with different colors, namely a first sub-pixel 302, a second sub-pixel 304 and a third sub-pixel 306. The supporting pillars 400 are disposed in the pixel unit 300 and between the first sub-pixel 302, the second sub-pixel 304, and the third sub-pixel 306. The support column 400 has a first end 410 and a second end 420. The distance between the first end 410 of the supporting pillar 400 and the first sub-pixel 302 of the pixel unit 300 where the supporting pillar 400 is located in the predetermined direction is d1, the distance between the first end 410 of the supporting pillar 400 and the second sub-pixel 304 of the pixel unit 300 where the supporting pillar 400 is located in the predetermined direction is d2, and the distance between the second end 420 of the supporting pillar 400 and the third sub-pixel 306 of the pixel unit 300 where the supporting pillar 400 is located in the predetermined direction is d 3. And d1, d2, d3 satisfy d3> d1, d3> d 2. The predetermined direction is any one of a row direction or a column direction of the array, that is, the predetermined direction is any one of an X direction or a Y direction in the embodiment shown in fig. 2.

In one embodiment, in the display screen, d1 and d2 may satisfy the following conditions: d1 ═ d 2.

Specifically, in the Y direction, the distance between the first end 410 of the supporting column 400 and the first sub-pixel 302 of the pixel unit 300 in the Y direction may be equal to the distance between the second end 420 of the supporting column 400 and the second sub-pixel 304 of the pixel unit 300 in the Y direction. It may also be that, in the X direction, the distance between the first end 410 of the supporting column 400 and the first sub-pixel 302 of the pixel unit 300 in the X direction may be equal to the distance between the second end 420 of the supporting column 400 and the second sub-pixel 304 of the pixel unit 300 in the X direction. In the embodiment shown in fig. 2, the first end 410 of the supporting pillar 400 overlaps the first sub-pixel 302 of the pixel unit 300 in the Y direction, and therefore d1 is 0. The second end 420 of the supporting column 400 also overlaps the second subpixel 304 of the pixel unit 300 in the Y direction, and thus d2 is 0. Thus, d1 ═ d 2.

In one embodiment, the angle between the length direction of the supporting column 400 and the predetermined direction is 20 ° to 70 °.

Specifically, as shown in fig. 2, in this embodiment, the supporting columns 400 enclose a triangle with the Y direction and the X direction, wherein the included angles enclosed by the supporting columns 400 with the Y direction and the X direction are acute angles.

In a specific embodiment, the included angle between the supporting column 400 and the predetermined direction Y may be 20 °, 70 °, or 45 °. When the included angle enclosed by the supporting column 400 and the Y direction in the preset direction is 20 degrees, the included angle enclosed by the supporting column 400 and the X direction in the preset direction is 70 degrees; when the included angle enclosed by the support column 400 and the Y direction in the preset direction is 70 degrees, the included angle enclosed by the support column 400 and the X direction in the preset direction is 20 degrees; when the included angle enclosed by the supporting columns 400 and the Y direction in the predetermined direction is 45 °, the included angle enclosed by the supporting columns 400 and the X direction in the predetermined direction is also 45 °.

In one embodiment, the vertical projection of the support column 400 of the display screen in the predetermined direction does not overlap with the third sub-pixel 306.

Specifically, as in the embodiment shown in fig. 2, the projection of the support column 400 in the Y direction is not overlapped with the projection of the third sub-pixel 306 in the Y direction; the projection of the support column 400 in the predetermined direction X is non-overlapping with the projection of the third subpixel 306 in the predetermined direction X.

In the display screen, the position of the projection of the support column 400 in the predetermined direction is limited, so that the support column 400 is far away from the third sub-pixel 306 as much as possible, and thus, the third sub-pixel 306 with a thicker film layer is not evaporated onto the support column 400 during evaporation. Thereby preventing the support column 400 from being unevenly pressed by the cover plate and damaged.

In one embodiment, as shown in fig. 3, three sub-pixels located in the same pixel unit 300 are respectively disposed at three vertices of an isosceles triangle. The first sub-pixel 302 is located at a top corner of the isosceles triangle, and the second sub-pixel 304 and the third sub-pixel 306 are located at two bottom corner positions of the isosceles triangle respectively. And the median line of the isosceles triangle is parallel to a predetermined direction.

Specifically, in one pixel unit 300, the first sub-pixel 302, the second sub-pixel 304 and the third sub-pixel 306 are respectively disposed at three vertices of an isosceles triangle, so that the centers of the first sub-pixel 302, the second sub-pixel 304 and the third sub-pixel 306 form an isosceles triangle. The first sub-pixel 302 is disposed at a vertex of the isosceles triangle, and the second sub-pixel 304 and the third sub-pixel 306 are disposed at two base angles of the isosceles triangle respectively.

The predetermined direction includes any one of a row direction or a column direction of the array, i.e., any one of an X direction or a Y direction. In this embodiment, the center line of an isosceles triangle formed by the centers of the first subpixel 302, the second subpixel 304, and the third subpixel 306 is parallel to one of the predetermined directions, such as the X direction.

In one embodiment, the pixel cells 300 are repeatedly arranged along at least one predetermined direction.

Specifically, the pixel units 300 may be repeatedly arranged in the X direction, may be repeatedly arranged in the Y direction, and may be repeatedly arranged in both the X direction and the Y direction. In the embodiment shown in fig. 2, the pixel cells 300 are arranged repeatedly in the row direction of the array, i.e., the X direction.

In another embodiment, in a direction perpendicular to a predetermined direction, in two adjacent pixel units 300, the vertex of the triangle is disposed opposite to the base.

Specifically, the centers of the first sub-pixel 302, the second sub-pixel 304 and the third sub-pixel 306 of each pixel unit 300 form an isosceles triangle. When the predetermined direction is the X direction, two adjacent pixel units 300 may be arranged in the Y direction with the apex and base of the triangle being opposite, i.e., as shown in fig. 2.

Or, the centers of the first sub-pixel 302, the second sub-pixel 304 and the third sub-pixel 306 of each pixel unit 300 form an isosceles triangle. When the predetermined direction is the Y direction, two adjacent pixel units 300 may be arranged in the X direction with the vertex and the base of the triangle facing each other, i.e., as shown in fig. 2.

In one embodiment, the opening area of the first sub-pixel is larger than the opening area of the second sub-pixel, and the opening area of the first sub-pixel is also larger than the opening area of the third sub-pixel.

Specifically, when the first sub-pixel is a blue sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a red sub-pixel, the aperture area of the blue sub-pixel should be larger than the aperture areas of the green sub-pixel and the red sub-pixel.

In one embodiment, as shown in fig. 4, the display screen of the present application further includes: the liquid crystal display device includes a substrate 100, a package cover 500 sealed with the substrate 100, and a pixel defining layer 200 disposed on the substrate 100.

Specifically, the substrate 100 is used for depositing the pixel defining layer 200 and the pixel unit 300, and is sealed with the package cover 500. The substrate 100 is a substrate of a display screen, and may be a flexible glass substrate 100 or a common glass substrate 100.

The sealing cover 500 is used for sealing the display screen body to prevent water and oxygen molecules in the air from entering the display screen to damage the pixel unit 300. One surface of the package cover 500 may be provided with a sealing frame 510, the sealing frame 510 is connected end to end on one surface of the package cover 500, and the height of the sealing frame 510 is uniform. After the package cover 500 is sealed with the substrate 100, a sealed cavity is formed inside the package cover 500, the substrate 100 and the sealing frame 510.

The pixel defining layer 200 is disposed on the substrate 100 and located in the sealing cavity. The pixel defining layer 200 serves to define the position of light emitting pixels. As shown in fig. 5, the pixel defining layer 200 includes a flat portion 204 and a plurality of independently disposed recesses 202 such that the pixel defining layer 200 forms a continuous grid-like structure on the substrate 100. Wherein several means more than one. Independent placement refers to the isolation of any two pits 202 from each other, thereby preventing short circuits between light emitting sub-pixels in adjacent pits 202.

In this embodiment, any one sub-pixel in the pixel unit 300 is independently disposed inside one pit 202, i.e., only one light-emitting sub-pixel is disposed inside any one pit 202. In general, the color of the light-emitting sub-pixels in two adjacent pits 202 is different.

The supporting pillars 400 are disposed on the flat portions 204 of the pixel defining layer 200, and the supporting pillars 400 support the package cover 500, so that when the package cover 500 is pressed by an external force and deformed toward the substrate 100, the external force is offset by the supporting pillars 400, thereby reducing the deformation of the package cover 500. In the present embodiment, the length direction of the supporting pillar 400 is not parallel to the side of any sub-pixel in the pixel unit 300. Specifically, the supporting pillar 400 is disposed on the flat portion 204 of the pixel defining layer 200, and the distance d1 between the first end 410 of the supporting pillar 400 and the first sub-pixel 302 in the first direction, the distance d2 between the second end 420 of the supporting pillar 400 and the second sub-pixel 304 in the first direction, and the distance d3 between the first end 410 of the supporting pillar 400 and the third sub-pixel 306 in the first direction satisfy d3> d1 and d3> d 2.

In the display panel, the supporting columns 400 are arranged at positions which enable the distance between the supporting columns 400 and the third sub-pixels 306 to be larger, so that the third sub-pixels 306 with larger thickness cannot be evaporated on the supporting columns 400 when the luminescent pixels are evaporated. Therefore, after the thicker third sub-pixel 306 is evaporated on the support column 400, the support column 400 is prevented from being damaged due to uneven cover plate extrusion force.

The application also provides a display device comprising the display screen in any one of the above embodiments.

In particular, the display device may be a computer monitor. The computer display may be a display screen in any of the above embodiments that is protected by a light transmissive cover. In this embodiment, the transparent cover plate may be disposed on the upper side of the encapsulation cover plate, so that when the OLED device emits light, the light may penetrate through the encapsulation cover plate and the transparent cover plate to display a color image to a user. The display device can also be mobile equipment such as a mobile phone and a tablet personal computer. When the display device is a mobile device, the display device may include the display screen in any of the above embodiments, and a driving device for driving the display screen, a power supply device for supplying power to the driving device, and the like. In this embodiment, the driving device can be disposed under the substrate of the display panel so as not to affect the light emission of the display panel. The power supply device can be arranged below the driving device so as to supply power to the driving device under the condition of not influencing the work of the display screen.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A display screen is characterized by comprising a plurality of pixel units which are arranged in an array; each pixel unit is formed by surrounding at least three sub-pixels with different colors; each pixel unit is internally provided with at least one supporting column, the length direction of each supporting column is not parallel to the side edge of any sub-pixel in the corresponding pixel unit, and each pixel unit comprises a first sub-pixel, a second sub-pixel and a third sub-pixel; the support column has a first end and a second end along the length direction of the support column; the first end of the supporting column is spaced from the first sub-pixel by a distance d1 in the preset direction; the distance between the second end of the supporting column and the second sub-pixel is d 2; the first end of the support post is spaced from the third sub-pixel by a distance d3, wherein d3> d1, d3> d 2; the predetermined direction is any one of a row direction or a column direction of the array, the first sub-pixel is a blue sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a red sub-pixel.

2. The display screen of claim 1, wherein d1 is d 2.

3. A display screen in accordance with claim 1, wherein the support posts have a length direction that is at an angle of 20 ° to 70 ° to the predetermined direction.

4. A display screen in accordance with claim 1, wherein the vertical projection of the support posts in the predetermined direction is non-overlapping with the third sub-pixel.

5. The display screen of claim 1, wherein three sub-pixels in the same pixel unit are respectively arranged at three vertexes of an isosceles triangle, wherein the first sub-pixel is located at a vertex angle of the isosceles triangle, and the second sub-pixel and the third sub-pixel are respectively located at two base angles of the isosceles triangle; and the middle line of the isosceles triangle is parallel to one of the predetermined directions.

6. The display screen of claim 1, wherein the pixel cells are arranged repeatedly along at least one of the predetermined directions; or the like, or, alternatively,

and the vertex angles and the base edges of the triangles in the two adjacent pixel units are arranged opposite to each other along the direction vertical to one preset direction.

7. The display screen of claim 1, wherein the first sub-pixel has an open area that is larger than the open areas of the second sub-pixel and the third sub-pixel.

8. A display device characterized by comprising a display screen according to any one of claims 1 to 7.