CN111180482A - Pixel structure, display substrate and display device - Google Patents
Pixel structure, display substrate and display device Download PDFInfo
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- CN111180482A CN111180482A CN201910221273.1A CN201910221273A CN111180482A CN 111180482 A CN111180482 A CN 111180482A CN 201910221273 A CN201910221273 A CN 201910221273A CN 111180482 A CN111180482 A CN 111180482A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/15—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission
- H01L27/153—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission in a repetitive configuration, e.g. LED bars
- H01L27/156—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission in a repetitive configuration, e.g. LED bars two-dimensional arrays
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
- H10K59/353—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels characterised by the geometrical arrangement of the RGB subpixels
Abstract
The invention relates to a pixel structure, a display substrate and a display device which are beneficial to realizing high-resolution display and have good stress stability. The pixel structure, the display substrate and the display device comprising the display substrate are additionally provided with the sub-pixel on the basis of three primary colors of red, green and blue, so that the color of the sub-pixel can be set according to the requirement, the display device with high color gamut or high brightness can be obtained, and the display device with high resolution can be realized by reasonably distributing the sub-pixels; the second sub-pixel of the display substrate surrounds the first sub-pixel and is spaced from the first sub-pixel, the third sub-pixel surrounds the second sub-pixel and is spaced from the second sub-pixel, and the fourth sub-pixel surrounds the third sub-pixel and is spaced from the third sub-pixel, so that the stress stability is good, and the display substrate can be applied to flexible devices, particularly telescopic display devices.
Description
Technical Field
The invention relates to the technical field of display, in particular to a pixel structure, a display substrate and a display device.
Background
Display technology is widely applied to the fields of mobile phones, computers, televisions, smart homes, vehicle-mounted display, medical display, outdoor advertisements and the like. Currently mainstream display technologies mainly include Liquid Crystal Displays (LCDs), Organic Light Emitting Diodes (OLEDs), and inorganic Light Emitting Diodes (LEDs). In almost all display technologies, in order to realize more realistic saturated color display, it is generally necessary to arrange and combine three primary colors of red (R), green (G), and blue (B) -display.
Currently, the mainstream arrangement mode of three primary colors is a mode of pixel by side, and the used graphs comprise rectangles, squares, triangular lines, diamonds, circles and the like. Each pattern is a sub-pixel of one color, each sub-pixel being an independent light emitting device. In order to obtain high-resolution display, high-density pixel arrangement is generally required, and the requirement on the preparation process is extremely high. Also in flexible display applications, the stress stability of this arrangement is poor.
Disclosure of Invention
In view of the above, it is desirable to provide a pixel structure, a display substrate and a display device which are favorable for realizing high resolution display and have good stress stability.
A pixel structure having a plurality of pixel units, the pixel units including a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel, in each of the pixel units, the second sub-pixel surrounding and spaced apart from the first sub-pixel, the third sub-pixel surrounding and spaced apart from the second sub-pixel, the fourth sub-pixel surrounding and spaced apart from the third sub-pixel;
the light emitting colors of three sub-pixels in the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel are different from each other, and the light emitting colors of the three sub-pixels with different light emitting colors are respectively selected from one of red, green and blue.
In one embodiment, in each of the pixel units, at least one of the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel is formed by a plurality of sub-light emitting units, and the sub-light emitting units of the sub-pixel having the plurality of sub-light emitting units are spaced from each other.
In one embodiment, in each pixel unit, at least two of the second sub-pixel, the third sub-pixel and the fourth sub-pixel are formed by a plurality of sub-light emitting units, and the plurality of sub-light emitting units of different sub-pixels correspond to one another.
In one embodiment, in each pixel unit, the first sub-pixel is also composed of a plurality of sub-light emitting units, and the plurality of sub-light emitting units of the first sub-pixel are also in one-to-one correspondence with the plurality of sub-light emitting units of other sub-pixels.
In one embodiment, in each pixel unit, adjacent sub-pixels are separated by a first pixel defining layer, and a plurality of sub-light emitting units of the same sub-pixel are separated by a second pixel defining layer.
In one embodiment, in each pixel unit, except for three sub-pixels of which the light emission colors are respectively selected from red, green and blue, the other sub-pixel of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel has a light emission color selected from one of red, green, blue, yellow and white.
In one embodiment, in each pixel unit, the light emission color of two of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel is blue, and the color coordinates of the blue light emitted by the two sub-pixels are different.
In one embodiment, in each pixel unit, except for three sub-pixels with emission colors selected from red, green and blue, the color of another sub-pixel is white, and the sub-pixels are continuously and uninterruptedly disposed in the pixel unit.
In one embodiment, the first sub-pixel is circular, the second sub-pixel and the third sub-pixel are circular, and the whole pixel unit is square or circular; or
The first sub-pixel is in an oval shape, the second sub-pixel and the third sub-pixel are in an oval ring shape, and the whole pixel unit is in a square shape or an oval shape; or
The first sub-pixel is in a polygon with axial symmetry, the second sub-pixel and the third sub-pixel are in a polygon ring similar to the first sub-pixel, and the whole pixel unit is in a square shape or a polygon similar to the first sub-pixel.
In one embodiment, the light emitting material of each of the sub-pixels is selected from one of an organic light emitting material and an inorganic light emitting material.
In one embodiment, the pixel structure has a plurality of repeating units arranged repeatedly in a row direction and a column direction, and each repeating unit includes at least one pixel unit.
In one embodiment, each of the repeating units includes one pixel unit, and the color of the first sub-pixel, the color of the second sub-pixel, the color of the third sub-pixel and the color of the fourth sub-pixel of the pixel unit in any two of the repeating units are the same.
In one embodiment, each of the repeating units includes a plurality of pixel units, and at least one of the first sub-pixel, the second sub-pixel, and the third sub-pixel of the plurality of pixel units in each of the repeating units has a different color.
In one embodiment, each of the repeating units includes nine pixel units arranged in a 3 × 3 array, and in three pixel units in any row and any column of each of the repeating units, the color of the first sub-pixel is different, the color of the second sub-pixel is different, and the color of the third sub-pixel is also different.
A display substrate having the pixel structure of any of the above embodiments, wherein a bottom electrode is disposed on the display substrate, and the minimum constituent unit of each sub-pixel is driven by an independent bottom electrode to emit light.
A display device comprising the display substrate of any of the above embodiments.
According to the pixel structure, the display substrate and the display device comprising the display substrate, the sub-pixel is additionally arranged on the basis of the three primary colors of red, green and blue, so that the color of the sub-pixel can be set according to the requirement, the display device with high color gamut or high brightness can be obtained, and the high-resolution display can be realized by reasonably arranging the sub-pixels; the second sub-pixel of the pixel structure surrounds the first sub-pixel and is spaced from the first sub-pixel, the third sub-pixel surrounds the second sub-pixel and is spaced from the second sub-pixel, and the fourth sub-pixel surrounds the third sub-pixel and is spaced from the third sub-pixel, so that the pixel structure has good stress stability and can be applied to flexible devices, particularly telescopic display devices.
Drawings
Fig. 1 is a schematic diagram illustrating a structure and an arrangement of a plurality of pixel units in a pixel structure according to embodiment 1;
FIG. 2 is an enlarged schematic view of the pixel cell of FIG. 1;
fig. 3 is a schematic diagram illustrating a structure and an arrangement of a plurality of pixel units in a pixel structure according to embodiment 2;
FIG. 4 is an enlarged schematic view of the pixel cell of FIG. 3;
fig. 5 is a schematic diagram illustrating a structure and an arrangement of a plurality of pixel units in a pixel structure according to embodiment 3;
FIG. 6 is an enlarged schematic view of the pixel cell of FIG. 5;
fig. 7 is a schematic diagram illustrating a structure and an arrangement of a plurality of pixel units in a pixel structure according to embodiment 4;
FIG. 8 is an enlarged schematic view of three pixel cells of FIG. 7;
FIG. 9 is a schematic diagram illustrating the structure and arrangement of a plurality of pixel units according to embodiment 5;
fig. 10a, 10b, 10c, 10d and 10e are schematic structural diagrams of pixel units according to other embodiments.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example 1
Referring to fig. 1 and fig. 2, embodiment 1 provides a pixel structure having a plurality of pixel units 100. Each pixel unit 100 includes a first subpixel 110, a second subpixel 120, a third subpixel 130, and a fourth subpixel 140. In each pixel unit 100, the second sub-pixel 120 surrounds the first sub-pixel 110 and is spaced apart from the first sub-pixel 110, the third sub-pixel 130 surrounds the second sub-pixel 120 and is spaced apart from the second sub-pixel 120, and the fourth sub-pixel 140 surrounds the third sub-pixel 130 and is spaced apart from the third sub-pixel 130. The first subpixel 110, the second subpixel 120, the third subpixel 130, and the fourth subpixel 140 form a nested structure of loop groups.
The plurality of pixel units 100 are distributed in an array, for example, in a regular matrix of rows and columns.
In each pixel unit 100, three sub-pixels of the first sub-pixel 110, the second sub-pixel 120, the third sub-pixel 130 and the fourth sub-pixel 140 have different emission colors, and the emission colors of the three sub-pixels having different emission colors are respectively selected from one of red, green and blue.
Further, in each pixel unit 100, except for the sub-pixels of which three emission colors are respectively selected from red, green and blue, among the first sub-pixel 110, the second sub-pixel 120, the third sub-pixel 130 and the fourth sub-pixel 140, the emission color of the other sub-pixel is selected from one of red, green, blue, yellow and white. For example, in fig. 2, the emission color of the first sub-pixel 110 is red (R), the emission color of the second sub-pixel 120 is green (G), the emission color of the third sub-pixel 130 is blue (B1), and the emission color of the fourth sub-pixel 140 is also blue (B2).
Since the efficiency of displaying blue among the three primary colors is generally low, the four sub-pixels of the pixel unit 100 are RGB1B2 respectively in order to improve the overall efficiency and lifetime of the device. It was found that, in the display technology, there is a rule that the higher the purity of the color, the lower the efficiency, and therefore, the color coordinates of blue light emitted by the blue sub-pixels (the third sub-pixel 130 and the fourth sub-pixel 140) of the two emission colors in fig. 2 are different, where B1 is deep blue and B2 is sky blue, where the deep blue B1 can widen the color gamut of the display device, and the sky blue B2 can make the display device obtain higher display efficiency, and therefore, with two blue light patterns with different color purities, a wide color gamut and high display efficiency can be simultaneously achieved. It is understood that in other embodiments, the positions of RGB1B2 are not limited to those shown in fig. 2, but may also be GRB1B2, B1RGB2, B1B2RG, or B2RB1G, etc., and are not exhaustive here.
In the plurality of pixel units 100 of the pixel structure, the light emitting colors of the first sub-pixels 110 of the pixel units 100 adjacent to each column and/or each row may be the same or different. For example, in the embodiment shown in fig. 1, in the plurality of pixel units 100, the first sub-pixels 110 of the adjacent pixel units 100 emit light of the same color, and are all red.
In each pixel unit 100 of embodiment 1, each of the first sub-pixel 110, the second sub-pixel 120, the third sub-pixel 130, and the fourth sub-pixel 140 is composed of two sub-light emitting units, different sub-light emitting units of the same sub-pixel are spaced from each other, and a plurality of sub-light emitting units of different sub-pixels correspond to each other one by one to form different sub-pixel units. Furthermore, for the sub-pixel unit composed of sub-light emitting units, independent bottom electrodes are arranged on the display substrate with the pixel structure to drive each sub-light emitting unit (namely, the minimum constitution unit for driving each sub-pixel), so that one pixel unit 100 actually forms a combination of two sub-pixel units of RGB1B2, the pixel resolution is doubled, and the technical support is provided for the display with high resolution.
In other embodiments, in each pixel unit 100, the first sub-pixel 110 may not be continuously divided into a plurality of sub-light emitting units, and at least two sub-pixels of the second sub-pixel 120, the third sub-pixel 130 and the fourth sub-pixel 140 may be formed by a plurality of sub-light emitting units, the sub-light emitting units of the same sub-pixel are spaced apart from each other, and the sub-light emitting units of different sub-pixels are in one-to-one correspondence, so that one pixel unit 100 may also include a plurality of sub-pixel units.
In each pixel unit 100, adjacent sub-pixels are separated from each other by a first pixel defining layer 150, and a plurality of sub-light emitting units of the same sub-pixel are separated from each other by a second pixel defining layer 160. The first pixel defining layer 150 and the second pixel defining layer 160 may be made of the same or different materials, and may have the same or different thickness and width dimensions. Preferably, in the specific example shown in fig. 2, the first pixel defining layer 150 has a width and a height greater than those of the second pixel defining layer 160.
In the specific example shown in fig. 1 and 2, the first sub-pixel 110 is circular (the two sub-light emitting units constituting the first sub-pixel 110 are respectively semicircular or approximately semicircular), the second sub-pixel 120 and the third sub-pixel 130 are circular (the sub-light emitting units constituting the second sub-pixel 120 and the third sub-pixel 130 are respectively semicircular or approximately semicircular), and the entire pixel unit 100 is square (rectangular or square). It is understood that, in other specific examples, the first sub-pixel 110, the second sub-pixel 120, the third sub-pixel 130, and the fourth sub-pixel 140 are not limited thereto, and specific reference may be made to the following embodiments.
The light emitting material of each sub-pixel is selected from one of an organic light emitting material (OLED), a quantum dot light emitting material (QLED), and an inorganic light emitting material such as a perovskite light emitting material.
Example 2
As shown in fig. 3 and 4, the structure of the pixel unit 200 of embodiment 2 is substantially the same as that of the pixel unit 100 of embodiment 1, and the differences mainly include the following points.
In each pixel unit 200 of embodiment 2, the light emitting color of the first sub-pixel 210 is blue, the light emitting color of the second sub-pixel 220 is green, the light emitting color of the third sub-pixel 230 is red, and the light emitting color of the fourth sub-pixel 240 is white. The white fourth sub-pixel 240 may increase the brightness of the display device, so that the requirements for the brightness of the first sub-pixel 210, the second sub-pixel 220, and the third sub-pixel 230 may be reduced, which may increase the lifetime of the entire display device. It is understood that, in other specific examples, the light emitting color of the first sub-pixel 210, the second sub-pixel 220, or the third sub-pixel 230 may be white, and the light emitting colors of the other three sub-pixels may be respectively selected from one of three primary colors.
Further, since the gray scale of the white light has little influence on the display effect of the color, in order to reduce the complexity of the process and the driving, the fourth sub-pixel 240 emitting white light is continuously disposed in each pixel unit, and the other sub-pixels (the first sub-pixel 210, the second sub-pixel 220, and the third sub-pixel 230) are each composed of four sub-light emitting units, so that one pixel unit 200 is actually composed of four sub-pixel units, and the resolution of the pixel can be improved by four times.
The first sub-pixel 210 is circular, the second sub-pixel 220, the third sub-pixel 230 and the fourth sub-pixel 240 are all circular, and the whole pixel unit 200 is circular. The first pixel defining layer 250 serves to separate the sub-pixels, and the second pixel defining layer 260 has a cross shape to divide the corresponding sub-pixel into a plurality of sub-light emitting units. The first pixel defining layer 250 and the second pixel defining layer 260 have the same material, width and thickness.
It is understood that in other specific examples, the sub-pixel having the white emission color may be formed of a plurality of sub-light emitting units that are independently driven.
Example 3
As shown in fig. 5 and 6, the structure and arrangement of the pixel unit 300 in the pixel structure of embodiment 3 are substantially the same as those of embodiment 1, and the differences are mainly the following points.
In each pixel unit 300 of embodiment 3, the first sub-pixel 310 is in an elliptical shape, the second sub-pixel 320 and the third sub-pixel 330 are in an elliptical ring shape, and the entire pixel unit 300 is in an elliptical shape and a rectangular shape. In other specific examples, the fourth sub-pixel 340 may also have an elliptical ring shape, and the entire pixel unit 300 has an elliptical shape.
The light emission color of the first sub-pixel 310 is blue, the light emission color of the second sub-pixel 320 is red, the light emission color of the third sub-pixel 330 is green, and the light emission color of the fourth sub-pixel 340 is blue. Because the color coordinate of the quantum dot blue light material is deeper, purer blue light can be obtained, but the service life is shorter, so that the light-emitting area of the blue light can be increased for prolonging the service life of the device, wherein the first sub-pixel 310 is prepared by adopting the blue light quantum dot material, the service life of the organic blue light material is longer, and the fourth sub-pixel 340 is prepared by adopting the blue light organic light-emitting material for prolonging the whole service life.
In each pixel unit 300, the first sub-pixel 310 has a continuous and uninterrupted oval shape, and the second sub-pixel 320, the third sub-pixel 330 and the fourth sub-pixel 340 are all composed of four sub-light emitting units. The second pixel defining layer 360 for separating the sub-light emitting units diverges in a cross shape from the first pixel defining layer 350 surrounding the first sub-pixel 310. One pixel unit 300 is actually composed of four sub-pixel units, and the resolution of the pixel can be improved by four times.
Example 4
As shown in fig. 7 and 8, the structure and arrangement of the pixel unit in the pixel structure of embodiment 4 are substantially the same as those of embodiment 3, except that: the first sub-pixels of the pixel units adjacent to each other (in the same row and/or the same column) in embodiment 4 emit light of different colors.
Specifically, the light emission colors of the first sub-pixel 410a, the second sub-pixel 420a, the third sub-pixel 430a and the fourth sub-pixel 440a of the pixel unit 400a in the same row of embodiment 4 are blue, red, green and blue, respectively; the first sub-pixel 410b, the second sub-pixel 420b, the third sub-pixel 430b and the fourth sub-pixel 440b of the pixel unit 400b emit green, blue, red and blue light respectively; the first sub-pixel 410c, the second sub-pixel 420c, the third sub-pixel 430c and the fourth sub-pixel 440c of the pixel unit 400c emit red, green, blue and blue light respectively; the same is true for the light emission color of the first sub-pixel in the adjacent pixel units in the same column.
By setting the colors of the adjacent first sub-pixels to be different, the uniformity of color development can be improved by reasonable color setting.
Example 5
As shown in fig. 9, the structure and arrangement of the pixel unit 500 in the pixel structure of embodiment 5 are substantially the same as those of embodiment 1, except that:
the first sub-pixel 510 of embodiment 5 is an isosceles triangle, the second sub-pixel 520, the third sub-pixel 530 and the fourth sub-pixel 540 are all isosceles triangle rings similar to the first sub-pixel 510, and the whole pixel unit 500 is an isosceles triangle;
the light emission colors of the first sub-pixel 510, the second sub-pixel 520, the third sub-pixel 530 and the fourth sub-pixel 540 are red, yellow, green and blue, respectively, and the second sub-pixel 520 with yellow can increase the brightness of the whole display device, and yellow light is softer than white light, and can generate less stimulation to the vision while improving the brightness;
the first pixel defining layer 550 is positioned between the adjacent sub-pixels to separate the adjacent sub-pixels, and the second pixel defining layer 560 extends and diverges from the center of the first sub-pixel 510 toward each vertex of the triangle to divide each sub-pixel into three sub-light emitting units, so that one pixel unit 500 is actually composed of three sub-pixel units and the resolution of the pixel can be improved by three times.
It is understood that in other specific examples, the first sub-pixel 510 may have other polygonal shapes with axial symmetry, such as a parallelogram, an axially symmetric pentagon, a hexagon, etc., the second sub-pixel 520 and the third sub-pixel 530 may have polygonal rings similar to the first sub-pixel 510, and the fourth sub-pixel 540 may have a square shape or polygonal rings similar to the first sub-pixel 510. The term "similar" as used herein means satisfying geometric similarity. Further, in each pixel unit 500, in addition to three sub-pixels constituting three primary colors, the color and the setting position of another sub-pixel can be flexibly set as needed.
The pixel structure includes a plurality of repeating units repeatedly arranged in a row direction and a column direction, and each repeating unit may include at least one pixel unit. For example, the repeating units in the pixel structures of embodiments 1 to 3 and 5 each include one pixel unit, and a plurality of repeating units are repeatedly arranged in the row direction and the column direction; in contrast, each repeating unit in the pixel structure of embodiment 4 includes a plurality of pixel units, each repeating unit includes nine pixel units arranged in a 3 × 3 array, and in three pixel units in any row and any column of each repeating unit, the color of the first sub-pixel is different, the color of the second sub-pixel is different, and the color of the third sub-pixel is also different. It can be understood that, for a repeating unit comprising a plurality of pixel units, it is sufficient to control at least one of the first sub-pixel, the second sub-pixel and the third sub-pixel of the plurality of pixel units in the same row or the same column in each repeating unit to have a different color.
The foregoing embodiments 1-5 and the specific examples thereof are merely illustrative of some possible pixel structures, and it is understood that the present invention is not limited thereto. For example, as shown in fig. 10a, 10b, 10c, 10d and 10e, the pixel unit shown in fig. 10a is square, wherein the first sub-pixel, the second sub-pixel and the third sub-pixel are circular, the first sub-pixel is continuous and complete, and the second sub-pixel, the third sub-pixel and the fourth sub-pixel are respectively separated into four sub-light emitting units by a second pixel defining layer extending outward from the first pixel defining layer surrounding the first sub-pixel; the structure of the pixel unit shown in fig. 10b is substantially the same as that of the pixel unit shown in fig. 10a, except that the second pixel defining layer extends outwardly from the center of the first sub-pixel, so that the first sub-pixel is also divided into four sub-light emitting units; the structure of the pixel unit shown in fig. 10c is substantially the same as that of fig. 10b, except that in the pixel unit of fig. 10c, the third sub-pixel is not divided into a plurality of sub-light emitting units by the second pixel defining layer, and the whole third sub-pixel is a continuous whole; the structure of the pixel cell shown in fig. 10d is substantially the same as that of the pixel cell shown in fig. 10b, except that each sub-pixel is divided into eight sub-light emitting units by the second pixel defining layer; the structure of the pixel unit shown in fig. 10e is substantially the same as that of the pixel unit shown in fig. 10a, except that the second sub-pixel, the third sub-pixel and the fourth sub-pixel are each partitioned into eight sub-light emitting units by the second pixel defining layer.
It can be understood that, in each embodiment, the pixel units of the pixel structure each include a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel, in each pixel unit, the second sub-pixel surrounds the first sub-pixel and is spaced from the first sub-pixel, the third sub-pixel surrounds the second sub-pixel and is spaced from the second sub-pixel, and the fourth sub-pixel surrounds the third sub-pixel and is spaced from the third sub-pixel; the light emitting colors of three sub-pixels in the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel are different, and the light emitting colors of the three sub-pixels with different light emitting colors are respectively selected from one of red, green and blue.
In some embodiments, in each pixel unit, at least one of the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel is formed of a plurality of sub-emitting units, and the sub-emitting units of the sub-pixel having the plurality of sub-emitting units are spaced apart from each other.
In some embodiments, in each pixel unit, preferably at least two sub-pixels of the second sub-pixel, the third sub-pixel and the fourth sub-pixel are formed by a plurality of sub-light emitting units, the sub-light emitting units of the same sub-pixel are spaced from each other, and the sub-light emitting units of different sub-pixels correspond to each other one by one. Further preferably, in each pixel unit, the first sub-pixel is also constituted by a plurality of sub-light emitting units, the plurality of sub-light emitting units constituting the first sub-pixel are spaced from each other, and the plurality of sub-light emitting units of the first sub-pixel and the plurality of sub-light emitting units of the other sub-pixels are also in one-to-one correspondence.
In some embodiments, in each pixel unit, adjacent sub-pixels are separated by a first pixel defining layer, and a plurality of sub-light emitting units of the same sub-pixel are separated by a second pixel defining layer.
In some embodiments, in each pixel unit, except for the sub-pixels of which three emission colors are respectively selected from red, green and blue, among the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel, the emission color of another sub-pixel is preferably selected from one of red, green, blue, yellow and white.
Further, in some embodiments, in each pixel unit, it is preferable that light emission colors of two of the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel are blue, and it is further preferable that color coordinates of blue light emitted by the two sub-pixels are different.
Further, in other embodiments, in each pixel unit, except for the sub-pixels with three emission colors respectively selected from red, green and blue, the emission color of another sub-pixel is white and the sub-pixels are continuously and uninterruptedly disposed in the pixel unit.
The light emitting material of each sub-pixel is selected from one of organic light emitting materials and inorganic light emitting materials (such as quantum dot light emitting materials).
In some embodiments, a bottom electrode is disposed on the display substrate having the pixel structure, and the minimum constituent unit of each sub-pixel (e.g., each sub-light emitting unit described above) is driven by the independent bottom electrode to emit light.
The pixel structure, the display substrate containing the pixel structure and the display device are additionally provided with one sub-pixel on the basis of three primary colors of red, green and blue, so that the color of the sub-pixel can be set according to the requirement, the display device with high color gamut or high brightness can be obtained, and the high-resolution display can be realized by reasonably distributing the sub-pixels; the second sub-pixel of the pixel structure surrounds the first sub-pixel and is spaced from the first sub-pixel, the third sub-pixel surrounds the second sub-pixel and is spaced from the second sub-pixel, and the fourth sub-pixel surrounds the third sub-pixel and is spaced from the third sub-pixel, so that the pixel structure has good stress stability and can be applied to flexible devices, particularly telescopic display devices.
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 more specific and detailed, but not construed 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 (16)
1. A pixel structure, wherein the pixel structure has a plurality of pixel units, each pixel unit comprises a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel, the second sub-pixel surrounds the first sub-pixel and is spaced apart from the first sub-pixel, the third sub-pixel surrounds the second sub-pixel and is spaced apart from the second sub-pixel, and the fourth sub-pixel surrounds the third sub-pixel and is spaced apart from the third sub-pixel;
the light emitting colors of three sub-pixels in the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel are different from each other, and the light emitting colors of the three sub-pixels with different light emitting colors are respectively selected from one of red, green and blue.
2. The pixel structure according to claim 1, wherein in each of the pixel units, at least one of the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel is formed of a plurality of sub-emitting units, and the plurality of sub-emitting units of the sub-pixel having the plurality of sub-emitting units are spaced apart from each other.
3. The pixel structure according to claim 2, wherein in each of the pixel units, at least two of the second sub-pixel, the third sub-pixel, and the fourth sub-pixel are formed of a plurality of sub-emitting units, and the plurality of sub-emitting units of different sub-pixels correspond one-to-one.
4. The pixel structure according to claim 3, wherein in each of the pixel units, the first sub-pixel is also formed by a plurality of sub-emitting units, and the plurality of sub-emitting units of the first sub-pixel are also in one-to-one correspondence with the plurality of sub-emitting units of the other sub-pixels.
5. The pixel structure of claim 4, wherein in each of the pixel units, adjacent sub-pixels are separated by a first pixel defining layer, and a plurality of sub-light emitting units of the same sub-pixel are separated by a second pixel defining layer.
6. The pixel structure according to any one of claims 1 to 5, wherein in each of the pixel units, except for three of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel, the other sub-pixel has an emission color selected from one of red, green, blue, yellow and white.
7. The pixel structure according to claim 6, wherein in each of the pixel units, two of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel emit blue light, and color coordinates of the blue light emitted by the two sub-pixels are different.
8. The pixel structure according to claim 6, wherein in each of the pixel units, except for three sub-pixels having emission colors respectively selected from red, green and blue, the other sub-pixel has a color of white and is continuously disposed in the pixel unit.
9. The pixel structure according to any one of claims 1 to 5 and 7 to 8, wherein the first sub-pixel has a circular shape, the second sub-pixel and the third sub-pixel have circular shapes, and the entire pixel unit has a square shape or a circular shape; or
The first sub-pixel is in an oval shape, the second sub-pixel and the third sub-pixel are in an oval ring shape, and the whole pixel unit is in a square shape or an oval shape; or
The first sub-pixel is in a polygon with axial symmetry, the second sub-pixel and the third sub-pixel are in a polygon ring similar to the first sub-pixel, and the whole pixel unit is in a square shape or a polygon similar to the first sub-pixel.
10. The pixel structure according to any one of claims 1 to 5 and 7 to 8, wherein the light emitting material of each sub-pixel is selected from one of an organic light emitting material and an inorganic light emitting material.
11. The pixel structure according to any one of claims 1 to 5 and 7 to 8, wherein the pixel structure has a plurality of repeating units repeatedly arranged in a row direction and a column direction, each of the repeating units including at least one of the pixel units.
12. The pixel structure of claim 11, wherein each of said repeating units comprises one of said pixel units, and wherein a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel of a pixel unit in any two of said repeating units have the same color.
13. The pixel structure of claim 11, wherein each of the repeating units comprises a plurality of the pixel units, and at least one of the first sub-pixel, the second sub-pixel, and the third sub-pixel of the plurality of the pixel units in the same row or the same column in each of the repeating units has a different color.
14. The pixel structure of claim 13, wherein each of said repeating units comprises nine of said pixel units arranged in a 3 x 3 array, and wherein in three of said pixel units in any row and any column of each of said repeating units, said first sub-pixel is a different color, said second sub-pixel is a different color, and said third sub-pixel is a different color.
15. A display substrate having a pixel structure as claimed in any one of claims 1 to 14, wherein a bottom electrode is disposed on the display substrate, and a minimum constituent unit of each of the sub-pixels is driven by an independent bottom electrode to emit light.
16. A display device comprising the display substrate according to claim 15.
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