CN109935617B - Pixel arrangement structure, display substrate and mask plate set - Google Patents
Pixel arrangement structure, display substrate and mask plate set Download PDFInfo
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- CN109935617B CN109935617B CN201811460032.4A CN201811460032A CN109935617B CN 109935617 B CN109935617 B CN 109935617B CN 201811460032 A CN201811460032 A CN 201811460032A CN 109935617 B CN109935617 B CN 109935617B
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- 239000000758 substrate Substances 0.000 title claims abstract description 21
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 92
- 230000000295 complement effect Effects 0.000 claims abstract description 29
- 238000007740 vapor deposition Methods 0.000 claims description 14
- 238000001704 evaporation Methods 0.000 abstract description 5
- 230000008020 evaporation Effects 0.000 abstract 1
- 239000010432 diamond Substances 0.000 description 19
- 239000003086 colorant Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229920001621 AMOLED Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
Abstract
A pixel arrangement structure, an evaporation mask plate and a display substrate. The pixel arrangement structure includes: each pixel group comprises a red sub-pixel, two green sub-pixels and a blue sub-pixel, wherein the red sub-pixel and the blue sub-pixel are arranged along a first direction, and the two green sub-pixels are arranged along a second direction. The four vertexes included in the red sub-pixel are positioned in the first virtual diamond and basically coincide with the four vertexes of the first virtual diamond; the blue sub-pixel comprises four vertexes which are positioned in the second virtual diamond and basically coincide with the four vertexes of the second virtual diamond; at least one of the red sub-pixel and the blue sub-pixel is in a shape that each side of the corresponding virtual diamond is concave inwards; the profiles of the sides of the green and red sub-pixels adjacent to each other are substantially complementary, and the profiles of the sides of the green and blue sub-pixels adjacent to each other are substantially complementary. The present disclosure can optimize a pixel light emitting area to increase a lifetime of a display device through an improvement in a pixel shape.
Description
Technical Field
At least one embodiment of the present disclosure relates to a pixel arrangement structure, a display substrate, and a mask blank set.
Background
Currently, in mobile phones and flat panel display technologies, an organic light emitting diode (Organic Light Emitting Diode, OLED) display is becoming the mainstream of next generation display due to its advantages of self-luminescence, bright color, low power consumption, and wide viewing angle. The organic light emitting diode includes an Active Matrix light emitting diode (AMOLED), which emits light itself, in contrast to a conventional liquid crystal display, instead of using a backlight. The organic light emitting diode is formed by vapor deposition of an organic material onto an array substrate, the organic material being vapor deposited on an anode within an opening of a Pixel Defining Layer (PDL) on the array substrate, the opening of the pixel defining layer being for defining a size of an actual light emitting area.
Disclosure of Invention
At least one embodiment of the present disclosure provides a pixel arrangement structure, a display substrate, and a mask plate set.
At least one embodiment of the present disclosure provides a pixel arrangement structure including: each pixel group comprises a red sub-pixel, two green sub-pixels and a blue sub-pixel, the red sub-pixels and the blue sub-pixels are arranged along a first direction, the two green sub-pixels are arranged along a second direction, and a connecting line between the center of the red sub-pixel and the center of the blue sub-pixel is intersected with a connecting line between the centers of the two green sub-pixels. The red sub-pixel comprises four vertexes positioned in a first virtual diamond and basically overlapped with the four vertexes of the first virtual diamond; the four vertices included by the blue sub-pixel are located within and substantially coincident with the four vertices of the second virtual diamond; at least one of the red sub-pixel and the blue sub-pixel is in a shape that each side of a corresponding virtual diamond is concave inwards; the outline of the side of the green and red sub-pixels adjacent to each other is substantially complementary, and the outline of the side of the green and blue sub-pixels adjacent to each other is substantially complementary.
For example, the shortest distance between sides of the red and green sub-pixels adjacent to each other is equal to the shortest distance between sides of the blue and green sub-pixels adjacent to each other.
For example, each of the red sub-pixel and the blue sub-pixel is in the shape of a corresponding virtual diamond, and each side of the red sub-pixel and the blue sub-pixel is concave inward in the shape of an arc side.
For example, the red subpixel and the blue subpixel are each in a center-symmetrical pattern.
For example, the shape of the red subpixel and the shape of the blue subpixel are shaped like a figure.
For example, the green sub-pixels are in an axisymmetric pattern.
For example, the green sub-pixel may have a substantially elliptical shape.
For example, the green sub-pixel includes a long axis parallel to the arrangement direction of the green sub-pixel and the red sub-pixel and a short axis parallel to the arrangement direction of the green sub-pixel and the blue sub-pixel.
For example, the area of each of the blue sub-pixels is larger than the area of each of the red sub-pixels.
For example, the area of each of the red sub-pixels is larger than the area of each of the green sub-pixels.
For example, the plurality of pixel groups are arranged in a direction parallel to the long axis and a direction parallel to the short axis.
For example, the shortest distance between the red and blue sub-pixels is equal to the shortest distance of the adjacent sides of the red and green sub-pixels.
For example, one of the red and blue subpixels is in the shape of a respective virtual diamond with each side concave inward in the shape of an arcuate side, and the other side is substantially a straight side.
For example, each subpixel has a rounded shape.
For example, two diagonal lines of the first virtual diamond are parallel to the first direction and the second direction, respectively, and two diagonal lines of the second virtual diamond are parallel to the first direction and the second direction, respectively.
At least one embodiment of the present disclosure provides a display substrate including: a substrate base; and any one of the above pixel arrangement structures on the substrate.
At least one embodiment of the present disclosure provides a mask plate set for evaporating the pixel arrangement structure, including: the first mask plate comprises a plurality of first openings, the plurality of first openings are used for forming a plurality of red sub-pixels, and four vertexes included in the first openings are four vertexes of a third virtual diamond; the second mask plate comprises a plurality of second openings, the second openings are used for forming a plurality of blue sub-pixels, and four vertexes included in the second openings are four vertexes of a fourth virtual diamond; and a third mask plate including a plurality of third openings for forming a plurality of the green sub-pixels. At least one of the first opening and the second opening is in a shape with each side of a corresponding virtual diamond inwards concave.
For example, the third opening comprises two first sides and two second sides opposite to each other, the first sides being substantially complementary to the contour of the sides of the first opening, the second sides being substantially complementary to the contour of the sides of the second opening.
For example, the first opening and the second opening are each in a shape of respective sides of a virtual diamond shape concave inward.
For example, one of the first opening and the second opening is in a shape in which each side of a corresponding virtual diamond is concave inward, and the other side is substantially a straight side.
The present disclosure can optimize a pixel light emitting area to increase a lifetime of a display device through an improvement in a pixel shape.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly described below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure, not to limit the present disclosure.
FIG. 1 is a schematic diagram of a pixel arrangement structure shown in FIG. 1;
FIG. 2A is a partial plan view of a pixel arrangement structure according to an example of an embodiment of the present disclosure;
FIG. 2B is a partial plan view of a pixel arrangement structure according to another example of an embodiment of the present disclosure;
FIG. 2C is a partial plan view of a pixel arrangement structure according to another example of an embodiment of the present disclosure;
FIG. 3 is a schematic view of a partial planar structure of a display substrate according to another embodiment of the disclosure;
fig. 4A-4C are schematic views of a mask plate set for evaporating the pixel arrangement structure according to another embodiment of the disclosure;
FIG. 4D is a schematic diagram of a third mask plate for vapor deposition of green sub-pixels provided in accordance with another example of another embodiment of the present disclosure; and
fig. 4E is a schematic diagram of a third mask plate for evaporating green sub-pixels provided in another example of another embodiment of the present disclosure.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without the need for inventive faculty, are within the scope of the present disclosure, based on the described embodiments of the present disclosure.
Unless defined otherwise, technical or scientific terms used in this disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items.
Fig. 1 is a schematic diagram of a pixel arrangement structure. As shown in fig. 1, the pixel arrangement structure includes a plurality of red sub-pixels 11, a plurality of green sub-pixels 12, and a plurality of blue sub-pixels 13. The pixel arrangement structure includes a plurality of first repeating units 10 and a plurality of second repeating units 20. Each first repeating unit 10 includes one red sub-pixel 11 and one green sub-pixel 12, and each second repeating unit 20 includes one blue sub-pixel 13 and one green sub-pixel 12. The plurality of first repeating units 10 and the plurality of second repeating units 20 are alternately arranged in the X direction and the Y direction, and the arrangement direction of the red sub-pixels 11 and the green sub-pixels 12 in the first repeating units 10 is different from the X direction and the Y direction, and the arrangement direction of the blue sub-pixels 13 and the green sub-pixels 12 in the second repeating units 20 is the same as the arrangement direction of the red sub-pixels 11 and the green sub-pixels 12 in the first repeating units 10. The plurality of red sub-pixels 11 and the plurality of blue sub-pixels 13 are alternately arranged in the X-direction and the Y-direction, the plurality of green sub-pixels 12 are arrayed in the X-direction and the Y-direction, and each four green sub-pixels 12 surrounds one red sub-pixel 11 or one blue sub-pixel 13.
As shown in fig. 1, the area of the blue sub-pixel 13 is larger than the area of the red sub-pixel 11, and the area of the red sub-pixel 11 is larger than the area of the green sub-pixel 12. The length of the adjacent side of the green sub-pixel 12 and the blue sub-pixel 13 is greater than the length of the adjacent side of the green sub-pixel 12 and the red sub-pixel 11.
As shown in fig. 1, an angle between a line c2 connecting the center (geometric center) of the green sub-pixel 12 and the center (geometric center) of the red sub-pixel 11 and a line c1 connecting the centers (geometric center) of the red sub-pixel 11 and the blue sub-pixel 13 is 45 degrees. The red and blue sub-pixels 11 and 13 are each shaped as a diamond, and two diagonal lines of the diamond extend in the X direction and the Y direction, respectively. The sides of the red and green sub-pixels 11 and 12 adjacent to each other are parallel, the sides of the green and blue sub-pixels 12 and 13 adjacent to each other are parallel, and thus, the distance L1 between the red and green sub-pixels 11 and 12 is the distance between the two parallel sides, the distance L2 between the green and blue sub-pixels 12 and 13 is the distance between the two parallel sides, and the distance L1 between the red and green sub-pixels 11 and 12 is equal to the distance L2 between the green and blue sub-pixels 12 and 13. And the distance L3 between the red sub-pixel 11 and the blue sub-pixel 13 is the distance between the two color sub-pixels in the X direction or the Y direction, and L3 is greater than L1. Due to process limitations, the red and blue subpixels 11 and 13 may not be strictly diamond-shaped, but may be generally diamond-shaped, such as rounded diamond-shaped, which is the shape formed by rounding the corners of the diamond. Similarly, the shape of the green sub-pixel 12 may not be strictly rectangular, but may be a substantially rectangular shape, such as a rounded rectangle, which is a shape in which corners of the rectangle are rounded.
Each of the above-described red, green, and blue sub-pixels 11, 12, and 13 includes, for example, a first electrode and a second electrode, and a light emitting layer between the first electrode and the second electrode. For example, the first electrode may be an anode, and since the light emitting layer emits light effectively only at a portion where the anode contacts the first electrode, the shape of the subpixel is the shape of a portion where the light emitting layer contacts the anode.
In the study, the inventors of the present application found that: as the resolution and brightness of the display device are higher, the size of the pixel is smaller, the effective light emitting area is smaller, and the aperture ratio of the red sub-pixel, the blue sub-pixel and the green sub-pixel is smaller, so that the service life of the product becomes a bottleneck of the organic light emitting diode display industry.
The embodiment of the disclosure provides a pixel arrangement structure, a display substrate and a mask plate. The pixel arrangement structure includes: each pixel group comprises a red sub-pixel, two green sub-pixels and a blue sub-pixel, the red sub-pixel and the blue sub-pixel are arranged along a first direction, the two green sub-pixels are arranged along a second direction, and a connecting line between the centers of the red sub-pixel and the blue sub-pixel is intersected with a connecting line between the centers of the two green sub-pixels. The red sub-pixel comprises four vertexes which are positioned in the first virtual diamond and basically coincide with the four vertexes of the first virtual diamond; the blue sub-pixel comprises four vertexes which are positioned in the second virtual diamond and basically coincide with the four vertexes of the second virtual diamond; at least one of the red sub-pixel and the blue sub-pixel is in a shape that each side of the corresponding virtual diamond is concave inwards; the profiles of the sides of the green and red sub-pixels adjacent to each other are substantially complementary, and the profiles of the sides of the green and blue sub-pixels adjacent to each other are substantially complementary. The present disclosure can optimize a pixel light emitting area to increase a lifetime of a display device through an improvement in a pixel shape.
The pixel arrangement structure, the display substrate, and the mask plate provided by the embodiments of the present disclosure are described below with reference to the accompanying drawings.
An embodiment of the present disclosure provides a pixel arrangement structure, and fig. 2A is a schematic partial plan view of the pixel arrangement structure provided by an example of the present disclosure. As shown in fig. 2A, the pixel arrangement structure includes: a plurality of pixel groups 100, each pixel group 100 including one red sub-pixel 110, two green sub-pixels 120, and one blue sub-pixel 130, the red sub-pixel 110 and the blue sub-pixel 130 being arranged in a first direction (X direction shown in the drawing), the two green sub-pixels 120 being arranged in a second direction (Y direction shown in the drawing), and a line between a center of the red sub-pixel 110 and a center (geometric center) of the blue sub-pixel 130 intersecting a line between centers (geometric centers) of the two green sub-pixels 120, i.e., the two green sub-pixels 120 being located on both sides in the Y direction of the line between the centers of the red sub-pixel 110 and the blue sub-pixel 130, respectively. Each pixel group 100 is a repeating unit, and the pixel arrangement structure includes a plurality of pixel groups 100 arranged in two directions having an included angle of 45 degrees with respect to the X direction. The four sub-pixels in each pixel group 100 form two pixels, one of the two green sub-pixels 120 forms one pixel with one red sub-pixel 110, the other of the two green sub-pixels 120 forms one pixel with one blue sub-pixel 130, and the red sub-pixel 110 and the blue sub-pixel 130 are respectively shared by the two pixels.
The pixel arrangement of the pixel arrangement structure shown in fig. 2A is the same as that of the pixel arrangement structure shown in fig. 1, that is, the pixel arrangement structure shown in fig. 2A includes a plurality of red sub-pixels 110, a plurality of green sub-pixels 120, and a plurality of blue sub-pixels 130 arranged in a plurality of first repeating units 101 and a plurality of second repeating units 102, each of the first repeating units 101 including one red sub-pixel 110 and one green sub-pixel 120, and each of the second repeating units 102 including one blue sub-pixel 130 and one green sub-pixel 120. The plurality of first repeating units 101 and the plurality of second repeating units 102 are alternately arranged in the X direction and the Y direction. The plurality of red sub-pixels 110 and the plurality of blue sub-pixels 130 are alternately arranged in the X-direction and the Y-direction, the plurality of green sub-pixels 120 are arrayed in the X-direction and the Y-direction, and each four green sub-pixels 120 surrounds one red sub-pixel 110 or blue sub-pixel 130.
As shown in fig. 2A, the red subpixel 110 includes four vertices located within the first virtual diamond 111 and substantially coincident with the four vertices of the first virtual diamond 111; the blue subpixel 130 includes four vertices within the second virtual diamond 131 and substantially coincides with the four vertices of the second virtual diamond 131. At least one of the red and blue sub-pixels 110 and 130 has a respective virtual diamond shape with each side thereof concave inward, the outline of the side of the green and red sub-pixels 120 and 110 adjacent to each other being substantially complementary, and the outline of the side of the green and blue sub-pixels 120 and 130 adjacent to each other being substantially complementary. The "the red sub-pixel and the blue sub-pixel are each concave on the sides of the corresponding virtual diamond" includes that a part of the red sub-pixel is each concave on the sides of the corresponding virtual diamond, and/or that a part of the blue sub-pixel is each concave on the sides of the corresponding virtual diamond; or all red sub-pixels are concave shapes of sides of corresponding virtual diamonds, and all blue sub-pixels are concave shapes of sides of corresponding virtual diamonds.
The red and blue subpixels 110, 130 in the example shown in fig. 2A are each of a respective virtual diamond shape with each side concave inward.
Each of the sub-pixels here includes, for example, a first electrode, a second electrode, and a light emitting layer between the first electrode and the second electrode. For example, the first electrode may be an anode, and since the light emitting layer emits light effectively only at a portion where the anode contacts the first electrode, the shape of the subpixel is the shape of a portion where the light emitting layer contacts the anode.
The above-described "the outline of the side where the green sub-pixel 120 and the red sub-pixel 110 are adjacent to each other is substantially complementary, the outline of the side where the green sub-pixel 120 and the blue sub-pixel 130 are adjacent to each other is substantially complementary" means that the sides where the green sub-pixel 120 and the red sub-pixel 110 are adjacent to each other are substantially parallel, and any point of the sides where the green sub-pixel 120 and the red sub-pixel 110 are adjacent to each other is substantially equal in distance from the sides where the red sub-pixel 110 and the green sub-pixel 120 are adjacent to each other. "substantially equal" as used herein includes being completely equal or approximately equal, meaning that the ratio between the maximum and minimum of distances is between 0.95 and 1.05.
In fig. 2A, the red sub-pixel 110, the green sub-pixel 120, and the blue sub-pixel 130 are solid lines, and the first virtual diamond 111 (the second virtual diamond 131) is a diamond surrounded by a dashed line located at the periphery of the red sub-pixel 110 (the blue sub-pixel 130).
In a practical process, the corners of the four vertices of the red and blue subpixels 110 and 130 may be rounded due to process limitations, and the first virtual diamond 111 having the four vertices of the red subpixel 110 as vertices may not be a strict diamond, but may be a general diamond, for example, a rounded diamond, which is a shape in which the corners of the diamond are rounded. Similarly, the second virtual diamond 131 with four vertices of the blue subpixel 130 as vertices may not be a strict diamond, but a substantially diamond. At this time, the two vertices of the red sub-pixel 110 (blue sub-pixel 130) in the X direction are the two points whose distance in the X direction is farthest, and similarly, the two vertices of the red sub-pixel 110 (blue sub-pixel 130) in the Y direction are the two points whose distance in the Y direction is farthest. Fig. 2A schematically illustrates a case where the patterns of the red sub-pixel and the blue sub-pixel are rounded corners, and the first virtual diamond and the second virtual diamond are rounded corners. Since the red and blue sub-pixels are rounded and the first and second virtual diamonds are rounded, the vertices of the virtual diamonds are approximately co-located with the vertices of the sub-pixels, and some deviation may occur.
For example, as shown in fig. 2A, two diagonal lines of the first and second virtual diamonds 101 and 102 are parallel to the first and second directions, respectively, that is, two diagonal lines of the first virtual diamond 101 extend in the X and Y directions, respectively, and two diagonal lines of the second virtual diamond 102 extend in the X and Y directions, respectively.
Fig. 1 is a schematic view of a partial planar structure of an original pixel arrangement structure, where the edges of each color sub-pixel are all straight edges. The present example shown in fig. 2A is a change based on the shape of each color sub-pixel in the original pixel arrangement structure.
For example, the side of the red subpixel 110 shown in fig. 2A is a side in which the straight side of the red subpixel 11 shown in fig. 1 is designed to be concave inward in a curved shape, and the positions of the four vertices of the red subpixel 110 shown in fig. 2A are unchanged with respect to the red subpixel 11 shown in fig. 1. The red subpixel 11 shown in fig. 1 is the circumscribed diamond of the red subpixel 110 shown in fig. 2A. The outline of the red subpixel 11 shown in fig. 1 substantially coincides with the outline of the first virtual diamond 111 of the periphery of the red subpixel 110 shown in fig. 2A. Thus, the area of the red subpixel 110 shown in fig. 2A is smaller than the area of the red subpixel 11 shown in fig. 1. Since the outline of the sides of the green sub-pixel 120 and the red sub-pixel 110 adjacent to each other are substantially complementary, the side of the green sub-pixel 120 adjacent to the red sub-pixel 110 shown in fig. 2A is a side in which the straight side of the green sub-pixel 12 shown in fig. 1 is designed to be outwardly convex into an arc shape. The outline of the green subpixel 12 shown in fig. 1 is illustrated in dashed box form on the green subpixel 120 shown in fig. 2A.
For example, the sides of the blue sub-pixel 130 shown in fig. 2A are sides in which the center point position of the side of the blue sub-pixel 13 shown in fig. 1 is unchanged, and the sides on both sides of the center point are curved outward into a curved shape, that is, the blue sub-pixel 13 shown in fig. 1 is an inscribed diamond shape of the blue sub-pixel 130 shown in fig. 2A. The outline of the blue subpixel 13 shown in fig. 1 is shown schematically in the form of a dashed box on the blue subpixel 130 shown in fig. 2A. Thus, the area of the blue subpixel 130 shown in fig. 2A is larger than the area of the blue subpixel 13 shown in fig. 1. Since the outline of the sides of the green sub-pixel 120 and the blue sub-pixel 130 adjacent to each other are substantially complementary, the side of the green sub-pixel 120 adjacent to the blue sub-pixel 130 shown in fig. 2A is a side in which the straight side of the green sub-pixel 12 shown in fig. 1 is designed as an arc shape, and the center of the arc shape coincides with the center of the original straight side.
Since the distance between the sub-pixels of different colors is related to the service life of the display device, generally, the smaller the distance between the sub-pixels of different colors is, the larger the area of the light emitting area of the sub-pixel is, the longer the service life of the product is, but the color mixing phenomenon occurs when the distance between the sub-pixels of different colors is too small. So in order to balance the lifetime of the display device with the distance between the different color sub-pixels, the distance between the different color sub-pixels in the pixel arrangement structure shown in fig. 2A is designed to be the same as the distance between the different color sub-pixels in the pixel arrangement structure shown in fig. 1. That is, when the shapes of the light emitting regions of the red and green sub-pixels are designed to be the shapes shown in fig. 2A, the distance between the red and green sub-pixels 110 and 120 should be equal to the distance between the red and green sub-pixels 11 and 12 shown in fig. 1, i.e., the distance between the red and green sub-pixels remains L1 although the shapes of the red and green sub-pixels are changed. After changing the shapes of the light emitting regions of the red sub-pixel and the green sub-pixel, the area of the light emitting region of the red sub-pixel is reduced, i.e., the aperture ratio is reduced, and the area of the light emitting region of the green sub-pixel is increased, i.e., the aperture ratio is increased, relative to the pixel arrangement structure shown in fig. 1, so that the lifetime of the display device can be improved.
Similarly, when the shapes of the light emitting areas of the blue and green sub-pixels are designed to be the shapes shown in fig. 2A, the distance between the blue and green sub-pixels 130 and 120 should be equal to the distance between the blue and green sub-pixels 13 and 12 shown in fig. 1, i.e., the distance between the blue and green sub-pixels remains L2 although the shapes of the blue and green sub-pixels are changed. After changing the shapes of the light emitting regions of the blue and green sub-pixels, the area of the light emitting region of the blue sub-pixel increases, that is, the aperture ratio increases, with respect to the pixel arrangement structure shown in fig. 1, and thus the lifetime of the display device can be improved.
For example, as shown in fig. 2A, the shape of the green sub-pixel 120 in this example is substantially elliptical after the shape of the green sub-pixel 120 is changed with respect to the shape of the green sub-pixel 12 shown in fig. 1.
For example, as shown in fig. 2A, after the shape of the green sub-pixel 120 in this example is changed, the area of the green sub-pixel 12 is increased with respect to that shown in fig. 1, the aperture ratio is increased, and the lifetime of the display device can be increased.
The present example schematically shows a case where the outline of the light emitting region of each color sub-pixel is changed from a straight line side to an arc side, but is not limited to this, and may be a case where the outline of the light emitting region of each color sub-pixel is changed from a straight line side to a broken line side, or the like, as long as the red sub-pixel and the blue sub-pixel are in a shape in which the sides of the corresponding virtual diamond are concave, the outline of the side of the green sub-pixel adjacent to each other and the outline of the side of the green sub-pixel adjacent to each other are substantially complementary, the outline of the side of the green sub-pixel adjacent to each other and the blue sub-pixel are substantially complementary, the area of the red sub-pixel becomes small, and the area of the blue sub-pixel and the green sub-pixel becomes large.
For example, as shown in fig. 2A, the minimum distance between the sides of the red and green sub-pixels 110 and 120 adjacent to each other is approximately equal to the shortest distance between the sides of the blue and green sub-pixels 130 and 120 adjacent to each other, i.e., l1=l2. "substantially equal" and subsequent "substantially equal" herein include perfect equality or approximate equality, meaning that the ratio of the two distances is in the range of 0.95-1.05.
The distance L1 between the red sub-pixel 11 and the green sub-pixel 12 in the pixel arrangement structure shown in fig. 1 is smaller than the distance L3 between the red sub-pixel 11 and the blue sub-pixel 13. In this example, the four vertex positions of the blue sub-pixel are changed so that the blue sub-pixel extends to the gap between the blue sub-pixel and the red sub-pixel relative to the structure shown in fig. 1, thereby reducing the distance between the blue sub-pixel and the red sub-pixel and increasing the aperture ratio of the vertex positions of the blue sub-pixel and the red sub-pixel.
For example, as shown in fig. 2A, the shortest distance L30 between the red sub-pixel 110 and the blue sub-pixel 130 is approximately equal to the shortest distance L1 between the red sub-pixel 110 and the green sub-pixel 120, that is, the distance L30 between the red sub-pixel 110 and the blue sub-pixel 130 in this example is smaller than the distance L3 between the red sub-pixel 11 and the blue sub-pixel 13 shown in fig. 1, so that the distances between the sub-pixels of different colors are equal, which can increase the aperture ratio of the pixel and further increase the service life of the display device.
For example, as shown in fig. 2A, the red sub-pixel 110 and the blue sub-pixel 130 are each in a center-symmetrical pattern, that is, the sides of the red sub-pixel 110 are equal in length and degree of curvature, and the sides of the blue sub-pixel 130 are equal in length and degree of curvature.
For example, as shown in fig. 2A, the shape of the red subpixel 110 and the shape of the blue subpixel 130 are shaped like a graph. The shape-like pattern is a pattern having a similar shape.
For example, as shown in fig. 2A, the green sub-pixel 120 is in an axisymmetric pattern, the green sub-pixel 120 includes a long axis 121 and a short axis 122, the long axis 121 is parallel to the arrangement direction of the green sub-pixel 120 and the red sub-pixel 110, and the short axis 122 is parallel to the arrangement direction of the green sub-pixel 120 and the blue sub-pixel 130. The plurality of pixel groups 100 are arranged in a direction parallel to the long axis 121 and in a direction parallel to the short axis 122.
For example, as shown in fig. 2A, since the lifetime of the blue light emitting material is short relative to that of the red light emitting material, the area of each blue subpixel 130 is larger than that of each red subpixel 110 to increase the lifetime of the display device.
For example, as shown in fig. 2A, the area of each red subpixel 110 is larger than the area of each green subpixel 120.
Fig. 2B is a partial plan view schematically showing a pixel arrangement structure provided by another example of the present embodiment. As shown in fig. 2B, the difference from the example shown in fig. 2A is that one of the red sub-pixel 110 and the blue sub-pixel 130 in this example is in the shape of a corresponding virtual diamond, each side of which is concave inward in the shape of an arc-shaped side, and the other side is substantially a straight side.
As shown in fig. 2B, the red subpixel 110 in this example is the same as the red subpixel 11 shown in fig. 1, i.e., the shape of the red subpixel 110 in this example is not changed, its sides are still straight sides, and its light emitting area is not changed. The sides of the blue sub-pixel 130 in this example are curved outwards to form a curved shape, i.e., the blue sub-pixel 13 in fig. 1 is an inscribed diamond shape of the blue sub-pixel 130 in fig. 2B, while the center point position of the side of the blue sub-pixel 13 in fig. 1 is unchanged. The outline of the blue subpixel 13 shown in fig. 1 is schematically shown in the form of a dashed box in the blue subpixel 130 shown in fig. 2B. Thus, the area of the blue subpixel 130 shown in fig. 2A is larger than the area of the blue subpixel 13 shown in fig. 1.
Since the outline of the sides of the green sub-pixel 120 and the blue sub-pixel 130 adjacent to each other are substantially complementary, the side of the green sub-pixel 120 adjacent to the blue sub-pixel 130 shown in fig. 2B is a side in which the straight side of the green sub-pixel 12 shown in fig. 1 is designed as an arc shape, and the center of the arc shape coincides with the center of the original straight side. After changing the shape of the light emitting region of the blue sub-pixel, the area of the light emitting region of the blue sub-pixel increases, that is, the aperture ratio increases, with respect to the pixel arrangement structure shown in fig. 1, and the lifetime of the display device can be improved.
In actual processes, the shape of the green sub-pixel may not be strictly rectangular, but may be rounded rectangular with four corners rounded off due to process limitations. Therefore, when the shape of the blue sub-pixel is changed to the shape shown in fig. 2B, the shape of the green sub-pixel is not changed and it is ensured that the shapes of the sides adjacent to each other of the blue sub-pixel are substantially complementary.
According to the display device, the shape of the blue sub-pixel is changed, so that the opening rate of the blue sub-pixel can be increased, the service life of the display device is prolonged, the distance between the blue sub-pixel and the red sub-pixel can be reduced, and the opening rate of the vertex positions of the blue sub-pixel and the red sub-pixel is increased.
Fig. 2C is a partial plan view schematically showing a pixel arrangement structure provided by another example of the present embodiment. As shown in fig. 2B, the difference from the example shown in fig. 2A is that one of the red sub-pixel 110 and the blue sub-pixel 130 in this example is in the shape of a corresponding virtual diamond, each side of which is concave inward in the shape of an arc-shaped side, and the other side is substantially a straight side.
As shown in fig. 2C, the blue sub-pixel 130 in this example is the same as the blue sub-pixel 13 shown in fig. 1, that is, the shape of the blue sub-pixel 130 in this example is not changed, its side is still a straight side, and its light emitting area is not changed. The sides of the red subpixel 110 in this example are sides in which the straight sides of the red subpixel 11 shown in fig. 1 are designed to be concave inward into an arc shape, and the positions of the four vertices of the red subpixel 110 shown in fig. 2C are unchanged relative to the red subpixel 11 shown in fig. 1, i.e., the red subpixel 11 shown in fig. 1 is an circumscribed diamond of the red subpixel 110 shown in fig. 2C. The outline of the red subpixel 11 shown in fig. 1 substantially coincides with the outline of the first virtual diamond 111 of the periphery of the red subpixel 110 shown in fig. 2A. Thus, the area of the red subpixel 110 shown in fig. 2C is smaller than the area of the red subpixel 11 shown in fig. 1.
Since the outline of the sides of the green sub-pixel 120 and the red sub-pixel 110 adjacent to each other are substantially complementary, the side of the green sub-pixel 120 adjacent to the red sub-pixel 110 shown in fig. 2C is a side in which the straight side of the green sub-pixel 12 shown in fig. 1 is designed to be outwardly convex into an arc shape. The outline of the green subpixel 12 shown in fig. 1 is illustrated in dashed box form on the green subpixel 120 shown in fig. 2A.
After changing the shapes of the light emitting regions of the red sub-pixel and the green sub-pixel, the area of the light emitting region of the red sub-pixel is reduced, i.e., the aperture ratio is reduced, and the area of the light emitting region of the green sub-pixel is increased, i.e., the aperture ratio is increased, relative to the pixel arrangement structure shown in fig. 1, so that the lifetime of the display device can be improved.
Fig. 3 is a schematic view of a partial planar structure of a display substrate according to another embodiment of the disclosure. As shown in fig. 3, the display panel provided in this embodiment includes a substrate 200 and a pixel arrangement structure on the substrate 200. Fig. 3 schematically illustrates the pixel arrangement structure as that illustrated in fig. 2A, but is not limited thereto, and may be the pixel arrangement structure illustrated in fig. 2B or 2C.
By adopting the display substrate provided by the embodiment, the service life of the product can be prolonged by optimizing the shapes of the light-emitting areas of the sub-pixels with different colors in the pixel arrangement structure.
For example, the area of the light emitting region of the red sub-pixel may be reduced, and the area of the light emitting region of the green sub-pixel may be increased, thereby improving the lifetime of the display device. Or the area of the light emitting area of the blue sub-pixel is increased, so that the service life of the display device is prolonged. Or the area of the light emitting area of the red sub-pixel is reduced, and the areas of the light emitting areas of the blue sub-pixel and the green sub-pixel are increased, so that the service life of the display device is prolonged.
For example, the present embodiment also provides a display device including the above display substrate, where the display device is an Organic Light-Emitting Diode (OLED) display device, and the display device may be applied to any product or component having a display function, such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a notebook computer, and a navigator, and the embodiment is not limited thereto.
Fig. 4A-4C are schematic diagrams of a mask plate set for evaporating the pixel arrangement structure according to another embodiment of the disclosure. This embodiment schematically illustrates a mask plate for vapor deposition of the pixel arrangement structure illustrated in fig. 2A.
For example, as shown in fig. 4A, the mask set 300 includes a first mask 301 for vapor plating the light emitting layer of the red sub-pixel 110 shown in fig. 2A, the first mask 301 including first openings 310 having the same shape as the red sub-pixel 110, and a plurality of the first openings 310 for forming a plurality of the red sub-pixels 110. The first opening 310 includes four vertices of a third virtual diamond 311. Since the red sub-pixel 110 has a shape in which each side of the corresponding virtual diamond is concave, the shape of the first opening 310 has a shape in which each side of the corresponding third virtual diamond 311 is concave, that is, each side of the diamond coinciding with four vertices of the first opening 310 is concave. Due to process limitations, the corners of the red sub-pixels 110 may be rounded, as well as the corners of the first openings 310, i.e., the third virtual diamond 311 may not be a strict diamond, but a rounded diamond with four rounded corners. Similarly, the corners of the other color subpixels are also illustrated as rounded corners, and the fourth virtual diamond is illustrated as a rounded diamond.
Since the red sub-pixel has a shape of a portion where the light emitting layer contacts the anode, the shape of the light emitting region can be determined by the shape of the light emitting layer when the area of the anode is larger than the area of the light emitting layer by designing the shape of the first opening of the first mask for vapor deposition of the light emitting layer of the red sub-pixel to have the shape of the light emitting layer of fig. 4A and the shape of the vapor deposited light emitting layer of the red sub-pixel to have the shape of the red sub-pixel of fig. 2A. Of course, the shape of the red subpixel shown in fig. 2A may be formed by designing the shape of the anode, that is, when the area of the light emitting layer is larger than that of the anode, the shape of the light emitting region may be determined by the shape of the anode.
For example, as shown in fig. 4B, the mask set 300 includes a second mask 302 for vapor deposition of the light emitting layer of the blue sub-pixel 130, and the second mask 302 includes a second opening 320 having the same pattern as the blue sub-pixel 130, that is, four vertices included in the second opening 320 are four vertices of a fourth virtual diamond 321. The plurality of second openings 320 are used to form the plurality of blue subpixels 130. Since the blue sub-pixel 130 has a concave shape of each side of the corresponding virtual diamond, the second opening 320 has a concave shape of each side of the corresponding fourth virtual diamond 321, that is, the shape of the second opening 320 has a concave shape of each side of the diamond overlapping with four vertices of the second opening 320.
In this embodiment, the shape of the second opening of the second mask plate for vapor deposition of the light emitting layer of the blue sub-pixel may be designed to be the shape shown in fig. 4B, and the shape of the vapor deposited light emitting layer may be designed to be the shape of the blue sub-pixel shown in fig. 2A.
For example, as shown in fig. 4C, the mask set 300 includes a third mask 303 for vapor plating the light emitting layer of the green sub-pixel 120 shown in fig. 2A, and the third mask 303 includes a third opening 330 having the same pattern as the green sub-pixel 120. The plurality of third openings 330 are used to form the plurality of green subpixels 120. Since the outlines of the sides of the green and red sub-pixels 120 and 110 adjacent to each other are substantially complementary, the outlines of the sides of the green and blue sub-pixels 120 and 130 adjacent to each other are substantially complementary. Thus, the third opening 330 comprises two first sides 331 and two second sides 332 opposite each other, the first sides 331 being substantially complementary to the contour of the sides of the first opening, the second sides 332 being substantially complementary to the contour of the sides of the second opening. The shape of the green sub-pixel 120 is substantially elliptical, and the shape of the second opening 320 is also elliptical, which is the same as the shape of the green sub-pixel 120.
To sum up, for the pixel arrangement structure shown in fig. 2A, the mask plate group shown in fig. 4A to 4C needs to be adopted, that is, the first opening of the first mask plate and the second opening of the second mask plate in the mask plate group are all concave shapes of respective sides of the virtual diamond shape.
Fig. 4D is a schematic partial structure of a third mask provided in another example of the present embodiment. In forming the pixel arrangement structure shown in fig. 2B, the following cases are included: in vapor deposition of the red sub-pixel, a conventional mask plate for vapor deposition of the red sub-pixel shown in fig. 1 may be used; when the blue sub-pixel is evaporated, a second mask plate shown in fig. 4B may be used; in the case of vapor deposition of the green sub-pixel, a mask for vapor deposition of the green pixel shown in fig. 1 may be used, or a third mask 403 as shown in fig. 4D may be used, and the second side of the third opening 430 in the mask 403 is substantially complementary to the outline of the side of the second opening of the second mask. In this example, the second opening of the second mask plate is concave with each side of the corresponding virtual diamond shape, and the first opening of the first mask plate has a shape of the corresponding virtual diamond shape, that is, the side of the first opening is substantially a straight side.
Fig. 4E is a schematic partial structure of a third mask provided as another example of the present embodiment. In the case of the pixel arrangement structure shown in fig. 2C, the following is included: in vapor deposition of the blue sub-pixel, a conventional mask plate for vapor deposition of the blue sub-pixel shown in fig. 1 may be used; when the red sub-pixel is evaporated, a first mask plate shown in fig. 4A may be used; in vapor deposition of the green sub-pixel, a third mask plate 503 as shown in fig. 4E may be used, and the first side of the third opening 530 in the mask plate 503 is substantially complementary to the outline of the side of the first opening of the first mask plate. In this example, the first opening of the first mask plate has a shape in which each side of the corresponding virtual diamond is concave, and the second opening of the second mask plate has a shape in which the corresponding virtual diamond is concave, that is, the side of the second opening is substantially a straight side.
In this embodiment, the shape of each first opening of the first mask is the same as the shape of the red subpixel, the shape of each second opening of the second mask is the same as the shape of the blue subpixel, and the shape of each third opening of the third mask is the same as the shape of the green subpixel.
It should be noted that, the area of each opening in fig. 4A-4E is larger than the area of the corresponding sub-pixel, that is, the orthographic projection of each sub-pixel on each mask plate falls completely into each opening.
In the pixel arrangement structure formed by the mask plate group provided by the embodiment, the shapes of the light emitting areas of the sub-pixels with different colors are optimized, so that the service life of the product can be prolonged.
The following points need to be described:
(1) In the drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are referred to, and other structures may refer to the general design.
(2) Features of the same and different embodiments of the disclosure may be combined with each other without conflict.
The foregoing is merely exemplary embodiments of the present disclosure and is not intended to limit the scope of the disclosure, which is defined by the appended claims.
Claims (16)
1. A pixel arrangement structure, comprising:
a plurality of pixel groups, each pixel group comprising a red sub-pixel, two green sub-pixels and a blue sub-pixel, the red sub-pixel and the blue sub-pixels being arranged along a first direction, the two green sub-pixels being arranged along a second direction, and a line between a center of the red sub-pixel and a center of the blue sub-pixel intersecting a line between centers of the two green sub-pixels,
the red sub-pixel comprises four vertexes which are positioned in a first virtual diamond and coincide with the four vertexes of the first virtual diamond; the four vertexes included in the blue sub-pixel are positioned in the second virtual diamond and coincide with the four vertexes of the second virtual diamond;
at least one of the red sub-pixel and the blue sub-pixel is in an inward concave shape of each side of a corresponding virtual diamond, and the sides of the red sub-pixel and the blue sub-pixel with the inward concave shapes are completely positioned in the corresponding virtual diamond;
the outline of the side of the green and red sub-pixels adjacent to each other is substantially complementary, and the outline of the side of the green and blue sub-pixels adjacent to each other is substantially complementary;
the shortest distance between the sides of the red sub-pixel and the green sub-pixel adjacent to each other is equal to the shortest distance between the sides of the blue sub-pixel and the green sub-pixel adjacent to each other, the green sub-pixel is in an axisymmetric pattern, the green sub-pixel comprises a long axis and a short axis, the long axis is parallel to the arrangement direction of the green sub-pixel and the red sub-pixel, the short axis is parallel to the arrangement direction of the green sub-pixel and the blue sub-pixel, the length of the long axis is greater than the length of the short axis, and the area of each blue sub-pixel is greater than the area of each red sub-pixel.
2. The pixel arrangement structure of claim 1, wherein each of the red and blue sub-pixels is in the shape of a respective virtual diamond with sides concave inward in an arcuate shape.
3. The pixel arrangement structure of claim 2, wherein the red and blue subpixels are each in a center-symmetrical pattern.
4. A pixel arrangement according to claim 3, wherein the shape of the red sub-pixel and the shape of the blue sub-pixel are shaped like a pattern.
5. A pixel arrangement according to claim 3, wherein the green sub-pixels are substantially elliptical in shape.
6. A pixel arrangement according to claim 3, wherein the area of each of the red sub-pixels is larger than the area of each of the green sub-pixels.
7. A pixel arrangement according to claim 3, wherein the plurality of pixel groups are arranged in a direction parallel to the long axis and in a direction parallel to the short axis.
8. The pixel arrangement structure of claim 2, wherein a shortest distance between the red and blue sub-pixels is equal to a shortest distance between adjacent sides of the red and green sub-pixels.
9. The pixel arrangement structure of claim 1, wherein one of the red and blue sub-pixels is in the shape of a respective virtual diamond with each side concave inward in the shape of an arcuate side, and the other side is substantially a straight side.
10. The pixel arrangement structure according to any one of claims 1 to 9, wherein each sub-pixel has a shape of a rounded corner pattern.
11. The pixel arrangement structure according to any one of claims 1 to 9, wherein two diagonal lines of the first virtual diamond are parallel to the first direction and the second direction, respectively, and two diagonal lines of the second virtual diamond are parallel to the first direction and the second direction, respectively.
12. A display substrate, comprising:
a substrate base;
and a pixel arrangement structure as claimed in any one of claims 1 to 11 on the substrate base.
13. A mask blank set for vapor deposition of the pixel arrangement structure according to any one of claims 1 to 11, comprising:
the first mask plate comprises a plurality of first openings, the plurality of first openings are used for forming a plurality of red sub-pixels, and four vertexes included in the first openings are four vertexes of a third virtual diamond;
the second mask plate comprises a plurality of second openings, the second openings are used for forming a plurality of blue sub-pixels, and four vertexes included in the second openings are four vertexes of a fourth virtual diamond; and
a third mask plate including a plurality of third openings for forming a plurality of the green sub-pixels,
at least one of the first opening and the second opening is in a shape that each side of a corresponding virtual diamond shape is concave inwards.
14. The set of reticles of claim 13, wherein the third opening comprises two first sides and two second sides opposite each other, the first sides being substantially complementary to a contour of a side of the first opening, the second sides being substantially complementary to a contour of a side of the second opening.
15. The set of reticles according to claim 13 or 14, wherein the first and second openings are each concave-inward shaped on each side of a respective virtual diamond.
16. A set of reticles according to claim 13 or 14, wherein one of the first and second openings is concave in shape with each side of a respective virtual diamond, the other side being substantially straight.
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| CN109817683B (en) * | 2019-01-31 | 2021-05-28 | 武汉华星光电半导体显示技术有限公司 | Display panel |
| CN110416267B (en) * | 2019-07-29 | 2022-01-18 | 京东方科技集团股份有限公司 | Method and device for determining sub-pixel arrangement of organic light-emitting display panel |
| CN110491911A (en) * | 2019-07-31 | 2019-11-22 | 云谷（固安）科技有限公司 | Pixel arrangement structure and display panel |
| CN110578112B (en) * | 2019-08-09 | 2020-09-01 | 武汉华星光电半导体显示技术有限公司 | Mask and pixel structure |
| JP7360272B2 (en) | 2019-08-19 | 2023-10-12 | 株式会社ジャパンディスプレイ | display device |
| CN110867481B (en) * | 2019-12-17 | 2022-12-06 | 武汉天马微电子有限公司 | Pixel arrangement structure, display panel and display device |
| US11569302B2 (en) | 2020-06-23 | 2023-01-31 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Pixel arrangement structure and display substrate |
| KR20220078528A (en) * | 2020-09-10 | 2022-06-10 | 보에 테크놀로지 그룹 컴퍼니 리미티드 | Pixel Arrays and Display Devices |
| CN112631020A (en) * | 2020-12-25 | 2021-04-09 | 舟山扑浪实业有限公司 | Quantum dot display panel, preparation method and display device |
| CN113053973B (en) * | 2021-03-11 | 2023-04-07 | 云南创视界光电科技有限公司 | Display substrate, color film substrate, display panel and display device |
| CN113097267A (en) * | 2021-03-30 | 2021-07-09 | 昆山国显光电有限公司 | Pixel arrangement structure, display panel and display device |
| CN113215528B (en) * | 2021-04-28 | 2022-04-19 | 武汉天马微电子有限公司 | Display panel evaporation assembly, evaporation method and display panel |
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| CN115377152B (en) * | 2022-07-29 | 2023-09-26 | 惠科股份有限公司 | Pixel arrangement structure, display panel and mask plate assembly |
| CN115884631B (en) * | 2022-12-20 | 2024-03-08 | 上海和辉光电股份有限公司 | Pixel arrangement structure, metal mask plate, display panel and display device |
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