KR20230144503A - Pixel arrangement structure for organic light emitting diode display - Google Patents

Abstract

The pixel array structure of the organic light emitting display device includes a first pixel, a second pixel that is spaced apart from the first pixel and whose center point is located at the first vertex of a virtual square with the center point of the first pixel as the center point of the square, and a third pixel that is spaced apart from the second pixel and has a center point located at a second vertex adjacent to the first vertex of the virtual square, wherein the first pixel, the second pixel, and the third pixel are spaced apart from the second pixel. Each pixel has a polygonal shape.

Description

Pixel array structure of organic light emitting display device {PIXEL ARRANGEMENT STRUCTURE FOR ORGANIC LIGHT EMITTING DIODE DISPLAY}

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

A display device is a device that displays images, and an organic light emitting diode display has recently been attracting attention.

Organic light emitting display devices have self-luminous characteristics and, unlike liquid crystal display devices, do not require a separate light source, thus reducing thickness and weight. Additionally, organic light emitting display devices exhibit high-quality characteristics such as low power consumption, high luminance, and high response speed.

Generally, an organic light emitting display device includes a plurality of pixels, each of which emits light of a different color, and the plurality of pixels emit light to display an image.

Here, a pixel refers to the minimum unit that displays an image, and between neighboring pixels there are power lines such as gate lines, data lines, and driving power lines for driving each pixel, and lines for defining the area or shape of each pixel. An insulating layer such as a pixel defining film may be located.

The organic light-emitting layer constituting the pixel of a conventional organic light-emitting display device was deposited using a mask such as a fine metal mask (FMM), and the gap between neighboring pixels was shortened to secure the aperture ratio of the pixel. When formed, there was a problem that deposition reliability was lowered, and when the gap between pixels was formed far apart to improve deposition reliability, there was a problem that the aperture ratio of the pixel was lowered.

One embodiment of the present invention is intended to solve the above-described problem and is intended to provide a pixel arrangement structure of an organic light emitting display device in which the aperture ratio of the pixel is improved and the gap between pixels is efficiently set.

One aspect of the present invention for achieving the above-described technical problem is a pixel array structure of an organic light emitting display device, which includes a first pixel, spaced apart from the first pixel, and the center point of the first pixel as the center point of a square. A second pixel whose center point is located at the first vertex of the virtual square, and a third pixel whose center point is located at a second vertex that is spaced apart from the second pixel and is adjacent to the first vertex of the virtual square. It provides a pixel array structure of an organic light emitting display device, wherein each of the first pixel, the second pixel, and the third pixel has a polygonal shape.

There may be a plurality of second pixels, and the plurality of second pixels may be spaced apart from each other with the first pixel interposed therebetween.

There may be a plurality of third pixels, and the plurality of third pixels may be spaced apart from each other with the first pixel interposed therebetween.

There are a plurality of second pixels, and there are a plurality of third pixels, 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 a larger area than the first pixel.

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 are a plurality of first pixels, and each neighboring first pixel among the plurality of first pixels may have an octagonal shape that is symmetrical to each other.

The second pixel may have a larger area than the third pixel.

The distance between the first pixel and the second pixel and the distance between the first pixel and the third pixel may each have the same first length.

*

*

*

*The distance between the second pixel and the third pixel may have a second length, and the distance between the neighboring first pixels may have a third length that is longer than each of the first and second lengths.

Each of the first pixel, the second pixel, and the third pixel may emit light 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 one of the embodiments of the above-described means for solving the problem of the present invention, a pixel arrangement structure of an organic light emitting display device in which the aperture ratio of the pixel is improved and the gap between pixels is efficiently set is provided.

1 is a diagram showing the pixel arrangement structure of an organic light emitting display device according to an embodiment of the present invention.

Hereinafter, with reference to the attached drawings, various embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. The invention may be implemented in many different forms and is not limited to the embodiments described herein.

In order to clearly explain the present invention, parts that are not relevant to the description are omitted, and identical or similar components are assigned the same reference numerals throughout the specification.

In addition, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, so the present invention is not necessarily limited to what is shown.

In addition, throughout the specification, when a part is said to "include" a certain component, this means that it may further include other components rather than excluding other components, unless specifically stated to the contrary.

Hereinafter, the pixel arrangement structure of the organic light emitting display device according to an embodiment of the present invention will be described with reference to FIG. 1. 1 is a diagram schematically showing a portion of pixels constituting an organic light emitting display device.

1 is a diagram showing the pixel arrangement structure of an organic light emitting display device according to an embodiment of the present invention.

As shown in FIG. 1, the pixel arrangement structure of the organic light emitting display device 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. ) includes.

Here, a pixel refers to the minimum unit that displays an image.

Between the first pixel 100, the second pixel 200, and the third pixel 300, power lines such as gate lines, data lines, and driving power lines for driving each pixel, and pixel definitions for defining each pixel. An organic light-emitting device may include an insulating layer such as a film, and includes an anode electrode, an organic light-emitting layer, and a cathode electrode corresponding to each of the first pixel 100, the second pixel 200, and the third pixel 300. (organic light emitting diode) may be located. Since the above configurations are known technologies in the prior art, they are not described for convenience of explanation, and the shape of each pixel may be defined by power lines, a pixel defining layer, or an anode electrode, but is not limited thereto.

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

The second pixel 200 is located at the first vertex (P1) of a virtual square (VS) with the center point of the first pixel (100) as the center point of the square, and the second vertex (P2) of the virtual square (VS) ) is located in the third pixel 300.

The second pixel 200 is spaced apart from the first pixel 100, and its center point is located at the first vertex (P1) of the virtual square (VS). The second pixel 200 has a larger area than the neighboring first pixel 100 and third pixel 300, and has a hexagonal shape among polygonal shapes. Meanwhile, the second pixel 200 may have a polygonal shape such as a triangle, square, pentagon, heptagon, or 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 spaced apart from each other with respect to the first pixel 100 . The second pixel 200 emits blue light and may include an organic light emitting layer that emits blue light. Meanwhile, the second pixel 200 includes an organic light emitting layer that emits light of various colors such as red, green, or white, and may emit red, green, or white light.

The third pixel 300 is spaced apart from the first pixel 100 and the second pixel 200, and has a center point at the second vertex (P2) adjacent to the first vertex (P1) of the virtual square (VS). It is located. The third pixel 300 has a larger area than the neighboring first pixel 100 and at the same time has a smaller area than the neighboring second pixel 200. The third pixel 300 has a square shape among polygonal shapes. Meanwhile, the third pixel 300 may have a polygonal shape such as a triangle, pentagon, hexagon, heptagon, or 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 spaced apart from each other with respect to the first pixel 100 . The third pixel 300 emits red light and may include an organic light emitting layer that emits red light. Meanwhile, the third pixel 300 includes an organic light emitting layer that emits light of various colors such as blue, green, or white, and may emit blue, green, or white light.

Meanwhile, the second pixel 200 and the third pixel 300 each have a hexagonal shape and a square shape, but the second pixel 200 and the third pixel 300 may each have a square shape and a hexagonal shape. . That is, one of the second pixels 200 and the third pixels 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 each emit green, blue, and red light, but the first pixel 100, the second pixel 200, Each of the third pixels 300 may emit light of a different color or may emit light of the same color. Specifically, the first pixel 100 may emit green light, one of the second pixel 200 and the third pixel 300 may emit blue light, and the other may emit red light. there is.

Each of the plurality of third pixels 300 and the plurality of second pixels 200 is arranged alternately on the second virtual straight line VL2, resulting in a plurality of plurality of pixels whose center point is located at the first vertex P1. Each of the second pixel 200 and the plurality of third pixels 300, the center of which is located at the second vertex P2, surrounds the first pixel 100 in a 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 with the center point of the first pixel 100 as the center point of the square, and the center point of the second pixel 200 is located at the second vertex P2. 3 As the center point of the pixel 300 is located, a plurality of second pixels 200 whose center point is located at the first vertex P1 and a plurality of third pixels 300 whose center point is located at the second vertex P2 Since each surrounds the first pixel 100 in a virtual square (VS), and each of the first pixel 100, the second pixel 200, and the third pixel 300 has a polygonal shape, the first pixel 100 The distance between the 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 neighboring second pixel ( The distance between 200) and the third pixel 300 has a second length (L2) different from the first length (L1), and the distance between the neighboring first pixels 100 has a first length (L1) and a second length. (L2) has a third length (L3) that is longer than each other.

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

As a result, a gap of the first length L1 is formed between the first pixel 100 and the second pixel 200 and between each of the first pixel 100 and the third pixel 300. At the same time, a gap of a third length (L3) longer than the first length (L1) is formed between the neighboring first pixels (100), so that the first pixel (100), the second pixel (200), and the third pixel ( 300) Deposition reliability is improved during the deposition process using a fine metal mask that forms the green organic light-emitting layer, blue organic light-emitting layer, and red organic light-emitting layer, respectively.

In addition, each of the plurality of second pixels 200 and the plurality of third pixels 300 is arranged to surround the first pixel 100 on a virtual square (VS), so that the first pixel 100 and the second pixel The aperture ratio of each of the pixels 200 and 300 can be improved. This serves as a factor in reducing the overall manufacturing time and manufacturing cost of the organic light emitting display device while improving the quality of images displayed by the organic light emitting display device.

In addition, the pixel arrangement structure of the organic light emitting display device according to an embodiment of the present invention emits blue light with a shorter lifespan than other pixels among the first pixel 100, the second pixel 200, and the third pixel 300. Since the light-emitting second pixel 200 has a larger area than each of the first pixel 100 and the third pixel 300, a decrease in the overall lifespan of the organic light emitting display device is suppressed. In other words, a pixel array structure for an organic light emitting display device with improved lifespan is provided.

As described above, the pixel arrangement structure of the organic light emitting display device according to an embodiment of the present invention is such that the first pixel 100, the second pixel 200, and the third pixel 300 are simply octagonal, hexagonal, and square, respectively. Considering the deposition process of the organic light emitting layer, which is a unique manufacturing characteristic of organic light emitting display devices, rather than each having a polygonal shape, the deposition reliability of the organic light emitting layer is improved during the deposition process using a fine metal mask, and at the same time, the first pixel (100), in order to improve the aperture ratio of each of the second pixel 200 and the third pixel 300, the center point of the first pixel 100 is located at the center point of the virtual square (VS), and the first vertex ( The center point of the second pixel 200 is located at 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 improve the deposition reliability of the organic light emitting layer and the aperture ratio of each of the first pixel 100, the second pixel 200, and the third pixel 300. A pixel array structure of an organic light emitting display device including a pixel 200 and a square third pixel 300 is provided.

Although the present invention has been described through preferred embodiments as 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 claims described below. Those working in the relevant technical field will easily understand.

1st pixel (100), 2nd pixel (200), 3rd pixel (300)

Claims (14)

A pixel array structure of an organic light emitting display device including a plurality of pixels,
a plurality of first pixels,
a plurality of second pixels, and
Comprising a plurality of third pixels,
The organic light emitting display device includes a pixel defining layer defining areas of the first pixel, the second pixel, and the third pixel,
The first pixel, the second pixel, and the third pixel are configured to emit light of different colors,
the first pixels are arranged in a first set extending along a first direction to form each first line,
the second pixels and the third pixels are alternately arranged in a second set extending along the first direction to form respective second lines parallel to the first line,
one of the second lines passing between the second pixels and the third pixels in the corresponding second sets and between the first pixels between adjacent first sets;
The first line and the second line are arranged alternately,
the first pixels are arranged in a third set extending along a second direction perpendicular to the first direction to form each third line;
the second pixels and the third pixels are alternately arranged within a fourth set extending along the second direction to form respective fourth lines parallel to the third line,
The third line and the fourth line are arranged alternately,
The first pixel, the second pixel, or the third pixel are alternately arranged along the first direction and a third direction intersecting the second direction,
An area that has a width in the second direction equal to the width of the first pixel in the second direction, extends parallel to the first direction, and completely overlaps a row of the first pixels extending in the first direction. does not overlap at all with at least one of the second pixel or the third pixel included in at least one of the rows of the second pixel and the third pixel adjacent to the row of the first pixel,
The shortest distance between two of the first pixels that are closest to each other in one of the first sets is between one of the second pixels and one of the third pixels that are closest to each other in one of the second sets. A pixel array structure of an organic light emitting display device that is larger than the shortest distance of . In paragraph 1:
One of the second lines passes through the centers of the second pixels and the third pixels in the corresponding second set. In paragraph 1:
A pixel array structure of an organic light emitting display device, wherein one of the first lines passes between the second pixels and the third pixels included in the correspondingly adjacent second sets. In paragraph 1:
A pixel array structure of an organic light emitting display device, wherein one of the third lines passes between the second pixels and the third pixels included in the correspondingly adjacent fourth sets. In paragraph 1:
A pixel array structure of an organic light emitting display device, wherein one of the fourth lines passes between the first pixels included in the correspondingly adjacent third sets. In paragraph 1:
The shortest distance between the first pixel and the second pixel and the shortest distance between the first pixel and the third pixel are the same first length. In paragraph 6:
The shortest distance between neighboring first pixels among the plurality of first pixels is a second length greater than the first length. In paragraph 1:
A pixel arrangement structure of an organic light emitting display device wherein the first pixels emit green light, the second pixels emit blue light, and the third pixels emit red light. In paragraph 1:
Each of the second pixels has a larger area than each of the third pixels. In paragraph 1:
A pixel array structure of an organic light emitting display device in which each of the third pixels has a larger area than each of the second pixels. In paragraph 1:
A pixel arrangement structure of an organic light emitting display device in which the first pixel, the second pixel, and the third pixel have a polygonal shape. In paragraph 11:
A pixel array structure of an organic light emitting display device in which two adjacent first pixels have an octagonal shape that is symmetrical to each other. In paragraph 1:
Each of the first pixels has a smaller area than the second pixels and the third pixels. A pixel array structure of an organic light emitting display device including a plurality of pixels,
a plurality of first pixels,
a plurality of second pixels, and
Comprising a plurality of third pixels,
The organic light emitting display device includes a pixel defining layer defining areas of the first pixel, the second pixel, and the third pixel,
The first pixel, the second pixel, and the third pixel are configured to emit light of different colors,
the first pixels are arranged in a first set extending along a first direction to form each first line,
the second pixels and the third pixels are alternately arranged in a second set extending along the first direction to form respective second lines parallel to the first line,
The first line and the second line are arranged alternately,
the first pixels are arranged in a third set extending along a second direction perpendicular to the first direction to form each third line;
the second pixels and the third pixels are alternately arranged within a fourth set extending along the second direction to form respective fourth lines parallel to the third line,
The third line and the fourth line are arranged alternately,
One of the first pixels and one of the second or third pixels are alternately arranged along the first direction and a third direction intersecting the second direction,
Each of the second pixels has a larger area than each of the third pixels,
The distance between the centers of the neighboring second pixels and the third pixels is a first length,
The distance between the centers of the neighboring first pixels and the second pixels and the distance between the centers of the neighboring first pixels and the third pixels is a second length,
The distance between centers of the neighboring first pixels is a third length greater than the second length,
The shortest distance between the two first pixels that are closest to each other in one of the first sets is the shortest distance between the second pixels and the third pixels that are closest to each other in one of the second sets. Pixel array structure of a larger organic light emitting display device.