JP2022177199A - display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pixel array structure of an organic light-emitting display device, in which an opening ratio of pixels is improved and a gap between the pixels is set efficiently.

SOLUTION: In a pixel array structure, a plurality of first pixels are arranged along a direction of a first axis (second axis that is perpendicular to the first axis) to form a plurality of first pixel rows (first pixel columns), second pixels and third pixels are arranged alternately along a direction of the first axis (second axis) parallel to the plurality of first pixel rows (first pixel columns) to form a plurality of second pixels and a third pixel row (second pixels and third pixel column), the plurality of first pixel rows (first pixel columns) and the plurality of second pixels and the third pixel row (second pixels and third pixel column) are disposed alternately, only one second pixel and one third pixel row are disposed between the two first pixel columns each including two first pixels adjacent along the direction of the first axis, and the first pixel has a smaller area than the second pixel and the third pixel.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2023,JPO&INPIT

Description

The present invention relates to a pixel array structure of an organic light emitting display device, and more particularly, to a pixel array structure of an organic light emitting display device in which a plurality of pixels emit light to display an image.

2. Description of the Related Art A display device is a device that displays an image, and recently, an organic light emitting diode display has been attracting attention.
The organic light emitting diode display has its own light emission characteristics and does not require a separate light source unlike a liquid crystal display device, so that the thickness and weight of the organic light emitting display can be reduced. In addition, the organic light emitting diode display exhibits high quality characteristics such as low power consumption, high brightness, and high reaction speed.

2. Description of the Related Art Generally, an organic light emitting diode display includes a plurality of pixels each emitting light of a different color, and the plurality of pixels emit light to display an image.
Here, a pixel means a minimum unit for displaying an image, and a gate line for driving each pixel, a data line, a power supply line such as a driving power supply line, and an area of each pixel are provided between adjacent pixels. Alternatively, an insulating layer such as a pixel defining film for defining the shape can be arranged.

An organic light-emitting layer constituting a pixel of a conventional organic light-emitting display device is formed by vapor deposition using a mask such as a fine metal mask (FMM). If the gap between the pixels is shortened, reliability of deposition is lowered, and if the gap between pixels is made long to improve deposition reliability, the pixel aperture ratio is lowered. there was a point

An embodiment of the present invention has been made in view of the above problems, and an object of the present invention is to improve the aperture ratio of pixels and at the same time set the gap between pixels efficiently. An object of the present invention is to provide a pixel array structure for a display device.

According to one aspect of the present invention for achieving the above-described technical problem, in a pixel array structure of an organic light-emitting display device, a first pixel is separated from the first pixel, and the center point of the first pixel is a second pixel whose center point is positioned at a first vertex of a virtual regular quadrangle serving as the center point of the regular quadrangle; and a third pixel having a center point located at two vertices, wherein each of the first pixel, the second pixel, and the third pixel provides a pixel array structure of an organic light emitting diode display having a polygonal shape.

There may be a plurality of second pixels, and the plurality of second pixels may be separated from each other with the first pixel interposed therebetween.
The third pixels may be a plurality, and the plurality of third pixels may be separated from each other with the first pixels interposed therebetween.
The second pixels may be plural, the third pixels may be plural, and each of the plurality of second pixels and the plurality of third pixels may surround the first pixel on the virtual square.

The second pixel and the third pixel may have larger areas than the first pixel.
The first pixel may have an octagonal shape, and at least one of the second pixel and the third pixel may have an octagonal shape.
The first pixel may have an octagonal shape, one of the second pixel and the third pixel may have a hexagonal shape, and the other may have a square shape.

There may be a plurality of first pixels, and adjacent first pixels among the plurality of first pixels may each have a symmetrical octagonal shape.
The second pixel may have a larger area than the third pixel.
A distance between the first pixel and the second pixel and a distance between the first pixel and the third pixel may each have the same first length.

A distance between the second pixel and the third pixel has a second length, and a distance between adjacent first pixels is greater than the first length and the second length, respectively. It can have a third length.
Each of the first pixel, the second pixel, and the third pixel may emit lights of different colors.

The first pixel may emit green light, one of the second pixel and the third pixel may emit blue light, and the other may emit red light.

According to any one of the above-described embodiments of the present invention, the pixel array structure of the organic light emitting display device in which the pixel aperture ratio is improved and the gap between pixels is efficiently set. is provided.

1 is a diagram illustrating a pixel arrangement structure of an organic light emitting diode display according to an embodiment of the present invention;

Various embodiments of the present invention will now be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry them out. This invention may be embodied in many different forms and is not limited to the embodiments set forth herein.
In order to clearly explain the present invention, parts unnecessary for explanation are omitted, and the same or similar components are given the same reference numerals throughout the specification.

Also, in the drawings, the size and thickness of each component are arbitrarily shown for convenience of explanation, and the present invention is not necessarily limited to those shown.
Also, throughout the specification, when a part "includes" a component, it does not mean that it excludes other components, unless otherwise specified. It means you can.

Hereinafter, a pixel array structure of an organic light emitting diode display according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic view of a portion of a pixel forming an organic light emitting diode display.
FIG. 1 is a diagram illustrating a pixel array structure of an organic light emitting diode display according to an embodiment of the present invention.

As shown in FIG. 1, a pixel array structure of an organic light emitting diode display according to an embodiment of the present invention includes a plurality of first pixels 100, a plurality of second pixels 200, and a plurality of third pixels 300. As shown in FIG.
Here, a pixel means a minimum unit for displaying an image.
Between the first pixel 100, the second pixel 200, and the third pixel 300, power lines such as a gate line, a data line, and a driving power line for driving each pixel, and pixels for defining each pixel are provided. An insulating layer such as a defining film can be disposed, and an organic light emitting element ( organic light emitting diode) can be arranged. Since these configurations are well-known techniques, they will not be described for convenience of explanation. The form of each pixel is defined by a plurality of power supply lines, a pixel defining film, an anode electrode, or the like, but is not limited thereto.

The first pixel 100 has a smaller area than the adjacent second and third pixels 200 and has a polygonal shape. The first pixel 100 has an octagonal shape among polygonal shapes, but is not limited thereto, and may have a polygonal shape such as a triangle, a square, a pentagon, a hexagon, and a heptagon. There are a plurality of first pixels 100, and adjacent first pixels 100 among the plurality of first pixels 100 each have a symmetrical octagonal shape. Meanwhile, each of the plurality of first pixels 100 may have the same octagonal shape. The plurality of first pixels 100 are arranged on the virtual first straight line VL1 while being separated from each other. The first pixel 100 may emit green light and may include an organic emission layer that emits green light. Meanwhile, the first pixel 100 includes an organic emission layer that emits light of various colors such as blue, red, or white, and can emit blue, red, or white light.

The second pixel 200 is positioned at the first vertex P1 of the virtual square VS whose center point is the center point of the first pixel 100, and the third pixel is located at the second vertex P2 of the virtual square VS. 300 is located.
The second pixel 200 is separated from the first pixel 100, and the center point is located at the first vertex P1 of the virtual square VS. The second pixel 200 has a larger area than the adjacent first and third pixels 100 and 300, and has a hexagonal shape among polygonal shapes. Meanwhile, the second pixel 200 may have a polygonal shape such as a triangle, a square, a pentagon, a heptagon, and an octagon. There are a plurality of second pixels 200, and each of the plurality of second pixels 200 has the same hexagonal shape. The plurality of second pixels 200 are separated from each other with the first pixels 100 interposed therebetween. The second pixel 200 may emit blue light and may include an organic emission layer that emits blue light. Meanwhile, the second pixel 200 includes an organic emission layer that emits various colors of light such as red, green, or white, and can emit red, green, or white light.

The third pixel 300 is separated from the first pixel 100 and the second pixel 200, and its center point is located at the second vertex P2 adjacent to the first vertex P1 of the virtual square VS. The third pixel 300 has a larger area than the adjacent first pixels 100 and a smaller area than the adjacent second pixels 200 . The third pixel 300 has a quadrangular shape among polygonal shapes. Meanwhile, the third pixel 300 may have a polygonal shape such as a triangle, pentagon, hexagon, heptagon, and octagon. There are a plurality of third pixels 300, and each of the plurality of third pixels 300 has the same rectangular shape. The plurality of third pixels 300 are separated from each other with the first pixels 100 interposed therebetween. The third pixel 300 may emit red light and may include an organic emission layer emitting red light. Meanwhile, the third pixel 300 includes an organic emission layer that emits light of various colors such as blue, green, or white, and can emit blue, green, or white light.

Meanwhile, the second pixel 200 and the third pixel 300 have a hexagonal shape and a square shape, respectively, and the second pixel 200 and the third pixel 300 can have a square shape and a hexagonal shape, respectively. That is, one of the second pixel 200 and the third pixel 300 may have a hexagonal shape and the other may have a square shape.

In addition, the first pixel 100, the second pixel 200, and the third pixel 300 emit green, blue, and red lights, respectively. They can emit light of different colors or they can emit light of the same color as each other. Specifically, the first pixel 100 emits green light, one of the second pixel 200 and the third pixel 300 emits blue light, and the other one emits red light. can be done.

The plurality of third pixels 300 and the plurality of second pixels 200 are alternately arranged on the virtual second straight line VL2, whereby the plurality of second pixels 200 whose center point is positioned at the first vertex P1, And each of the plurality of third pixels 300 whose center point is located at the second vertex P2 surrounds the first pixel 100 on the virtual square VS.

In this way, the center point of the second pixel 200 is located at the first vertex P1 of the virtual square VS having the center point of the first pixel 100 as the center point of the square, and the third pixel 300 is located at the second vertex P2. By positioning the center points of the virtual square VS While surrounding the first pixel 100 above, the first pixel 100, the second pixel 200, and the third pixel 300 each have a polygonal shape, so that between the first pixel 100 and the second pixel 200 and the distance between the first pixel 100 and the third pixel 300 each have the same first length L1, and the distance between the adjacent second pixel 200 and the third pixel 300 is the first It has a second length L2 that is different from the length L1, and the distance between adjacent first pixels 100 has a third length L3 that is longer than the first length L1 and the second length L2, respectively. become.

As an example, the first length L1 may be 15um to 35um, the second length L2 may be 20um to 45um, and the third length L3 may be 25um to 65um. .

As a result, gaps of the first length L1 are formed between the first pixel 100 and the second pixel 200 and between the first pixel 100 and the third pixel 300, and at the same time, the adjacent first pixels 100 are formed. A gap having a third length L3 longer than the first length L1 is formed between the green colors included in each of the first pixel 100, the second pixel 200, and the third pixel 300. , a blue organic light emitting layer, and a red organic light emitting layer.

Further, the plurality of second pixels 200 and the plurality of third pixels 300 are arranged so as to surround the first pixel 100 on the virtual square VS, so that the first pixel 100, the second pixel 200, and the third pixel The aperture ratio of each of the three pixels 300 can be improved. This reduces the overall manufacturing time and cost of the organic light emitting diode display and improves the quality of the image displayed by the organic light emitting diode display.

In addition, the pixel arrangement structure of the organic light emitting diode display according to an embodiment of the present invention may be a blue pixel having a shorter lifetime than other pixels among the first pixel 100, the second pixel 200, and the third pixel 300. Since the second pixel 200 that emits light has a larger area than each of the first pixel 100 and the third pixel 300, it is possible to reduce the overall lifespan of the organic light emitting diode display. That is, a pixel array structure of an organic light emitting diode display having improved life is provided.

As described above, in the pixel arrangement structure of the organic light emitting diode display according to an embodiment of the present invention, the first pixel 100, the second pixel 200, and the third pixel 300 are simply octagonal, hexagonal, and hexagonal, respectively. Considering the deposition process of the organic light-emitting layer, which is a unique manufacturing characteristic of the organic light-emitting display device, instead of having a polygonal shape such as a square, deposition reliability of the organic light-emitting layer is improved during the deposition process using a fine metal mask. In order to improve the aperture ratio of the first pixel 100, the second pixel 200, and the third pixel 300 at the same time, the center point of the first pixel 100 is positioned at the center point of the imaginary square VS. , the center point of the second pixel 200 is located at the first vertex P1, and the center point of the third pixel 300 is located at the second vertex P2.

That is, the octagonal first pixel 100 and the hexagonal second pixel 100 improve the aperture ratios of the first pixel 100, the second pixel 200, and the third pixel 300 while improving the deposition reliability of the organic light emitting layer. A pixel array structure of an organic light emitting diode display including a pixel 200 and a square third pixel 300 is provided.

Although the present invention has been described through the preferred embodiments described above, the present invention is not limited thereto, and various modifications and variations are possible without departing from the concept and scope of the following claims. This can be easily understood by those skilled in the art to which the present invention belongs.

100 1st pixel 200 2nd pixel 300 3rd pixel

Claims (1)

A pixel array structure of an organic light-emitting display device including a plurality of first pixels, a plurality of second pixels, and a plurality of third pixels,
the first pixel, the second pixel, and the third pixel emit lights of different colors;
The plurality of first pixels are arranged along a direction of a first axis to form a plurality of first pixel rows, and the second pixels and the third pixels are arranged in the first pixel rows parallel to the plurality of first pixel rows. A plurality of second pixels and third pixel rows are alternately arranged along one axis direction, and the plurality of first pixel rows and the plurality of second pixels and third pixel rows are alternately arranged. is,
The plurality of first pixels are arranged along a direction of a second axis perpendicular to the first axis to form a plurality of first pixel columns, and the second pixels and the third pixels are arranged in the plurality of alternately arranged along the direction of the second axis parallel to the first pixel columns to form a plurality of second pixels and a third pixel column, wherein the plurality of first pixel columns and the plurality of second pixels and alternately arranged with the third pixel column,
Between the two first pixel columns each including two first pixels adjacent to each other along the direction of the first axis, only one second pixel and one third pixel column are arranged;
the plurality of first pixels, the second pixels, and the third pixels each being a minimum unit for displaying an image, the first pixels having a smaller area than the second pixels and the third pixels;
the shortest distance between the first pixel and the second pixel and the shortest distance between the first pixel and the third pixel each have the same first length L1;
the shortest distance between the second pixel and the third pixel has a second length L2 different from the first length L1;
A pixel array structure of an organic light emitting diode display device, wherein a shortest distance between adjacent first pixels has a third length L3 longer than each of the first length L1 and the second length L2.

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