CN111063712A

CN111063712A - Pixel structure and display device

Info

Publication number: CN111063712A
Application number: CN201911270555.7A
Authority: CN
Inventors: 周尚�; 张娣; 唐昊
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-04-24

Abstract

The invention provides a pixel structure and a display device, wherein the pixel structure comprises a pixel group which is arranged in an array mode, the pixel group comprises a first pixel unit and a second pixel unit, the first pixel unit comprises a first sub-pixel which is arranged diagonally, the second pixel unit comprises a second sub-pixel which is arranged diagonally, the first sub-pixel in the first pixel unit is adjacent to the second sub-pixel in the second pixel unit and is formed by using the same mask plate in a vapor deposition mode during preparation, the process flow is simplified through the design of the pixel structure, and meanwhile the problems that the screen brightness of the display device is inconsistent, the color cast is serious and the like during display are solved.

Description

Pixel structure and display device

Technical Field

The present disclosure relates to the field of display technologies, and in particular, to a pixel structure and a display device.

Background

Organic Light-Emitting devices (OLEDs) have the advantages of self-luminescence, fast response, lightness, thinness, etc. compared with liquid crystal display devices, and have become a new technology in the display field.

A plurality of pixels formed of a plurality of red (R), green (G) and blue (B) sub-pixels are included inside the above light emitting device, and the entire image is formed by controlling the luminance and chromaticity of the pixels. In general, R, G, B three kinds of light-emitting materials have different light-emitting life and different light-emitting efficiency, so that after a period of use of the conventional panel, the luminance attenuation degrees of the three kinds of RGB materials are different, which further causes the luminance of a display screen and the color cast of the screen.

In summary, the RGB pixel units in the conventional OLED display panel are unreasonably arranged, and the attenuation degrees of the RGB pixel units are different, so that the display image has display problems of uneven brightness, severe color cast and the like when the screen is displaying, and the effect is not ideal.

Disclosure of Invention

The present disclosure provides a pixel structure and a display device. The problems that the structural arrangement of pixel units in the existing panel is unreasonable in design, and the attenuation degrees of the pixel units with different colors are different, so that the brightness of a display picture is uneven, the color cast is serious and the like are solved.

To solve the above technical problem, the technical solution provided by the embodiment of the present disclosure is as follows:

according to a first aspect of the embodiments of the present disclosure, there is provided a pixel structure, including:

the pixel group comprises a first pixel unit and a second pixel unit, and the first pixel unit and the second pixel unit comprise a plurality of sub-pixels which are arranged in a rectangular shape;

the first pixel unit comprises a plurality of first sub-pixels arranged diagonally, the second pixel unit comprises a plurality of second sub-pixels arranged diagonally, and the first sub-pixels in the first pixel unit are adjacent to the second sub-pixels in the second pixel unit.

According to an embodiment of the present disclosure, the first sub-pixel and the second sub-pixel are sub-pixels of the same color.

According to an embodiment of the present disclosure, the first sub-pixel and the second sub-pixel are both blue sub-pixels.

According to an embodiment of the present disclosure, the pixel group includes three sub-pixels, namely a red sub-pixel, a blue sub-pixel and a green sub-pixel, the blue sub-pixel is disposed diagonally, and the red sub-pixel and the green sub-pixel are respectively disposed at another diagonal position of the pixel unit.

According to an embodiment of the present disclosure, the area of the blue sub-pixel is larger than the area of the green sub-pixel, and the area of the green sub-pixel is larger than the area of the red sub-pixel.

According to an embodiment of the present disclosure, the adjacent first sub-pixel and the adjacent second sub-pixel between the first pixel unit and the second pixel unit are prepared by the same mask.

According to an embodiment of the present disclosure, the pixel structure further includes an anode layer disposed at a peripheral edge of the sub-pixels and surrounding each of the sub-pixels.

According to an embodiment of the present disclosure, the anode layers of the first sub-pixel or the second sub-pixel are connected to each other through an electrode bridge.

According to an embodiment of the present disclosure, the pixel structure further includes a via disposed on the anode layer.

According to a second aspect of the present disclosure, there is also provided a display device including the pixel structure provided in the embodiments of the present disclosure.

In summary, the beneficial effects of the embodiment of the present disclosure are: the invention provides a pixel structure and a display device, wherein the structural arrangement of pixels in the existing display device is changed, RGB pixel units are rearranged according to the characteristics and the light-emitting characteristics of the pixel units, and a corresponding mask plate structure is designed according to the structural arrangement of the pixels, so that the process flow is simplified, and the problems of inconsistent screen brightness, serious color cast and color edge effect of the display device during display are reduced.

Drawings

In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some of the disclosed embodiments, and that other drawings can be obtained by those skilled in the art without inventive effort.

Fig. 1 is a schematic structural diagram of a pixel arrangement in a display panel according to an embodiment of the disclosure;

fig. 2 is a schematic diagram of a film structure corresponding to a pixel structure according to an embodiment of the disclosure;

FIG. 3 is a schematic diagram illustrating a pixel arrangement of another display panel according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of a corresponding film structure of FIG. 3 according to an embodiment of the disclosure;

FIG. 5 is a schematic diagram of an R sub-pixel mask structure corresponding to the pixel structure in FIG. 1;

FIG. 6 is a schematic diagram of a G sub-pixel mask structure corresponding to the pixel structure in FIG. 1;

fig. 7 is a schematic diagram of a B sub-pixel mask structure corresponding to the pixel structure in fig. 1.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. It is to be understood that the described embodiments are merely illustrative of some, but not all embodiments of the disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any inventive step, are intended to be within the scope of the present disclosure.

The embodiment of the disclosure provides a pixel structure, which includes a plurality of pixel groups, wherein the pixel groups are arranged on a substrate of a display panel in an array manner. The pixel group comprises a first pixel unit and a second pixel unit, and the first pixel unit and the second pixel unit can be adjacently arranged. A plurality of sub-pixels are arranged in each of the first pixel units and each of the second pixel units, and when the plurality of sub-pixels are arranged, the plane structures of the sub-pixels are rectangular. In the first pixel unit and the second pixel unit, the first sub-pixel is diagonally arranged in the first pixel unit with the rectangular structure, and the second sub-pixel is also diagonally arranged in the second pixel unit with the rectangular structure.

As shown in fig. 1, fig. 1 is a schematic structural diagram of a pixel arrangement in a display panel according to an embodiment of the disclosure. In the pixel arrangement structure, a plurality of pixel groups 10 are included, and the pixel groups 10 are arranged in an array in the row and column directions to form an array pixel structure. Meanwhile, a first pixel unit 101 and a second pixel unit 102 are included in each pixel group 10. The first pixel unit 101 and the second pixel unit 102 are disposed adjacent to each other up and down. In the first pixel unit 101, the first sub-pixel 12 is diagonally disposed in the first pixel unit 101, and the second sub-pixel 13 is also diagonally disposed in the second pixel unit 102.

Preferably, in the embodiment of the present disclosure, the first pixel unit 101 and the second pixel unit 102 are both 2 × 2 matrices. For each pixel unit, the pixel unit includes a red (R) pixel, a green (G) pixel, and a blue (B) pixel inside.

Meanwhile, the first sub-pixel 12 and the second sub-pixel 13 may be the same color sub-pixel. In the embodiment of the present disclosure, the first sub-pixel 12 and the second sub-pixel 13 are exemplified by blue (B) pixels, and for convenience of distinguishing, the blue pixels are labeled as B1 and B2 pixels, and thus the description is given. And the R pixels and the G pixels are disposed at other positions of the matrix.

Thus, in each pixel group 10, B1 pixels are arranged diagonally to B2 pixels, and B1 pixels in the first pixel unit 101 are also adjacent to B2 pixels in the second pixel unit 102, i.e., the structural unit shown in structure 11 is formed.

Since all the pixels in the structure 11 are blue, the same mask plate can be used for vapor deposition etching when the structure of the pixel structure 11 is formed, so as to simplify the preparation process.

Specifically, as shown in fig. 2, fig. 2 is a schematic diagram of a film structure corresponding to a pixel structure according to an embodiment of the disclosure. Fig. 2 shows a small structural unit included in fig. 1, and the structure includes a pixel group 10 arranged in an array, and a plurality of sub-pixels, such as R, G, B sub-pixels, arranged in the pixel group 10. When R, G, B sub-pixels in the pixel group 10 are arranged, the arrangement positions provided in the embodiment of the present disclosure are arranged, and the specific arrangement rule is as shown in fig. 1 and described in the embodiment, and will not be described in detail here.

Since the human eye is more sensitive to green light and less sensitive to red and blue light than to red light, depending on the physiological properties of the human eye in vision, when observing different colors. Therefore, according to this feature, when the respective sub-pixels in the pixel group 10 are arranged, the different sub-pixels are arranged in areas of different sizes. Specifically, the areas of the red and green sub-pixels are set to be larger, and the area of the blue sub-pixel is set to be smaller. In the embodiment of the present disclosure, the area of each sub-pixel is sequentially green sub-pixel > red sub-pixel > blue sub-pixel, i.e., G > R > B. Meanwhile, when the blue sub-pixels B1 and B2 are provided, the areas of the pixels may be set to be the same in size. By changing the area of different sub-pixels, the recognition and perception of human eyes on the display screen are improved, and finally the display effect of the display panel is improved.

In the preparation of each sub-pixel in fig. 2, an opening is made at the position of the flat layer corresponding to each sub-pixel, an organic light emitting material is deposited on the peripheral area of the sub-pixel by evaporation, and each sub-pixel is etched to finally form each pixel unit.

Also included in the structure of fig. 2 is an anode layer 20, which anode layer 20 is disposed around the perimeter of each subpixel and surrounds each of said subpixels. Since the blue sub-pixels in each pixel group 10 are diagonally arranged in the embodiment of the present disclosure, when the anode layer 20 is arranged, the blue sub-pixels B1 and B2 also share one anode layer, and the anode layer of the B1 sub-pixel is connected to the anode layer of the B2 sub-pixel through the electrode bridge 22, so that the anode layer is formed as a global anode layer.

Further, via holes 21 are further disposed on the anode layer 20, a via hole 21 is disposed on the anode layer 20 corresponding to each sub-pixel, the via hole 21 may be disposed at the anode layer 20 where the two sub-pixels are opposite, and for a blue sub-pixel diagonally disposed in the pixel group 20, the via hole 21 is disposed on the electrode bridge 22, and preferably, may be disposed in the middle of the electrode bridge 22. In combination with other film layer structures of the real panel, the via holes 21 correspond to the corresponding positions of the source and the drain of the thin film transistor in the display panel, and the connection of electrodes between different film layers is realized through the via holes 21, so that the structure and the function of the whole display panel are completed.

Preferably, as shown in fig. 3, fig. 3 is a schematic structural diagram of a pixel arrangement in another display panel according to an embodiment of the present disclosure. With reference to the schematic pixel arrangement structure shown in fig. 1, in the embodiment of the disclosure, a first pixel unit 101 and a second pixel unit 102 are disposed in the pixel group 30, and a plurality of sub-pixels are disposed in the first pixel unit 101 and the second pixel unit 102. Here, the blue sub-pixels (B1, B2) are diagonally disposed in the first pixel unit 101 and the second pixel unit 102, such as in the pixel group 30, the first sub-pixel 31 is diagonally disposed in the first pixel unit 101, and the second sub-pixel 32 is also diagonally disposed in the second pixel unit 102, so that the blue sub-pixels B1 and B2 adjacent to each other up and down in each pixel group 30 can be prepared by using the same opening mask plate structure 33. Therefore, the fact that the B1 and the B2 still share the same mask plate structure 33 for etching formation is guaranteed, and the production process is simplified. Unlike the subpixel arrangement in fig. 1, the positions of the red R and G subpixels in each of the first and

second pixel units

101 and 102 are reversed.

Since the positions of the R and G sub-pixels are changed and the area of the corresponding sub-pixels are changed, in the embodiment of the present disclosure, the area of each sub-pixel is configured to be G > R > B1(B2), and the total area of the entire blue sub-pixel B-B1 + B2 is greater than that of the G, R sub-pixel. Therefore, the display effect of the display panel is effectively ensured.

Preferably, when the area size of each sub-pixel is configured, the area size can be specifically set according to the actual needs of specific products and in combination with the comprehensive requirements of the products, so as to ensure the optimal display effect of the display device.

As shown in fig. 4, fig. 4 is a schematic view of a film structure corresponding to fig. 3 in the embodiment of the disclosure. In the embodiment of the disclosure, with reference to the structure in fig. 2, fig. 4 is a schematic diagram of a partial film structure corresponding to the pixel array structure in fig. 3, and in the structure, the structure further includes an anode layer and a via hole disposed on the anode layer, and the specific arrangement is the same as that in fig. 3, and will not be described here in detail.

In a further embodiment, corresponding to the pixel structure diagram in the embodiment in fig. 1, a mask is further provided in the embodiment of the present disclosure, as shown in fig. 5, and fig. 5 is a schematic diagram of an R sub-pixel mask structure corresponding to the pixel structure in fig. 1. The mask plate 500 is provided with an R sub-pixel opening structure 501, when the R sub-pixel opening structure 501 is arranged, openings are arranged according to corresponding positions of the R sub-pixels in fig. 1, so that when the mask plate evaporation process is adopted for evaporating R sub-pixels, the R sub-pixel opening structure 501 is exactly in one-to-one correspondence with positions of the R sub-pixels in the pixel group 10, and the etching precision of the R sub-pixels and the consistency of the whole pixel structure are ensured.

Preferably, as shown in fig. 6 and 7, fig. 6 is a schematic structural diagram of a mask corresponding to the G sub-pixel, and fig. 7 is a schematic structural diagram of a mask corresponding to the B sub-pixel. In fig. 6, when the mask 500 corresponding to the G sub-pixel is designed, the G sub-pixel corresponding to the pixel structure in fig. 1 is designed, so that when the mask 500 is used for vapor deposition of the G sub-pixel, the G sub-pixel and the G sub-pixel can be in one-to-one correspondence, and the accuracy of vapor deposition is ensured.

In the present disclosure, referring to fig. 1 and fig. 7, the B sub-pixels in the first pixel unit and the B sub-pixels in the second pixel unit are adjacent to each other, so that when the mask 500 corresponding to the B sub-pixels is designed, the B1 sub-pixels in the first pixel unit and the B2 sub-pixels in the second pixel unit can be opened as the same B sub-pixel opening 503, and evaporation is performed through the same B sub-pixel opening 503 at one time, so as to complete the design of the B sub-pixels. The area of the opening corresponding to the B sub-pixel is larger than that of the R, G sub-pixel, so that the vapor deposition is easier to perform at the time of vapor deposition. Moreover, the evaporation of the B sub-pixels in the first pixel unit and the second pixel unit can be completed through one-time evaporation process, so that the evaporation process is effectively simplified, the aperture opening ratio of the pixels is improved, and the luminous life of the B sub-pixels is prolonged.

After evaporation of each sub-pixel is completed, the pixel structure in the embodiment of the disclosure not only ensures normal display of an image frame in the display panel, but also can avoid the problems of uneven brightness, color cast and uneven color in the pixel arrangement mode in the prior art, and improve the display effect of the display panel.

Meanwhile, the embodiment of the disclosure also provides a display device, wherein the display device comprises the pixel structure provided by the embodiment of the disclosure, and when each pixel is evaporated, the display device also comprises the mask plate structure provided by the embodiment of the disclosure. The display device provided by the embodiment of the disclosure has uniform display screen brightness and high display quality.

The above detailed description is provided for a pixel structure and a display device provided by the embodiments of the present disclosure, and the above description of the embodiments is only used to help understanding the technical solutions and the core ideas of the present disclosure; those of ordinary skill in the art will understand that: it is to be understood that modifications may be made to the arrangements described in the embodiments above, and such modifications or alterations may be made without departing from the spirit of the respective arrangements of the embodiments of the present disclosure.

Claims

1. A pixel structure, comprising:

2. The pixel structure of claim 1, wherein the first sub-pixel and the second sub-pixel are sub-pixels of the same color.

3. The pixel structure according to claim 2, wherein the first sub-pixel and the second sub-pixel are both blue sub-pixels.

4. The pixel structure according to claim 2, wherein the pixel group comprises three sub-pixels, namely a red sub-pixel, a blue sub-pixel and a green sub-pixel, the blue sub-pixel is arranged diagonally, and the red sub-pixel and the green sub-pixel are respectively arranged at the other diagonal positions of the pixel unit.

5. The pixel structure of claim 4, wherein the area of the blue sub-pixel is larger than the area of the green sub-pixel, and the area of the green sub-pixel is larger than the area of the red sub-pixel.

6. The pixel structure according to claim 1, wherein the adjacent first sub-pixel and the adjacent second sub-pixel between the first pixel unit and the second pixel unit are prepared from a same mask.

7. The pixel structure of claim 1, further comprising an anode layer disposed around the peripheral edges of the sub-pixels and surrounding each of the sub-pixels.

8. The pixel structure according to claim 7, wherein the anode layers of the first or second sub-pixels are connected to each other by an electrode bridge.

9. The pixel structure of claim 7, further comprising a via disposed on the anode layer.

10. A display device comprising a pixel structure according to any one of claims 1 to 9.