CN114141803B

CN114141803B - Pixel array and display device

Info

Publication number: CN114141803B
Application number: CN202111361731.5A
Authority: CN
Inventors: 孙博
Original assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2023-11-28
Anticipated expiration: 2041-11-17
Also published as: CN114141803A

Abstract

The application discloses a display device and a pixel array thereof, wherein the whole pixel array comprises a plurality of pixel units and a plurality of light emitting units, one light emitting unit is arranged in each pixel unit, each light emitting unit comprises M LEDs, the plurality of pixel units form a plurality of repeated pixel unit groups, each pixel unit group comprises N pixel units, the pixel area in each pixel unit group is divided into M virtual subareas with the same area, the virtual subareas are not overlapped with each other, and each virtual subarea is internally provided with one LED, wherein M and N are positive integers. Compared with the centralized arrangement of LEDs in a single pixel unit in the prior art, the LED array structure has the advantages that LEDs in each pixel unit group are dispersed in the corresponding pixel area in a star-of-the-world mode, so that the condition that the non-luminous areas in the pixel array are concentrated in a large area is avoided, and the display effect is effectively improved.

Description

Pixel array and display device

Technical Field

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

Background

MiniLED and Micro LED (MLED) are widely recognized as next generation display technologies behind TFT-LCD. The LCD is a light-transmitting display mode, and the backlight can be uniformly projected through the opening area in the pixel unit area, so that more than 70% of the area in one pixel unit area shows uniform light intensity. However, in the MLED display device, the LEDs in one pixel unit are generally concentrated at a certain position in the area of the pixel unit, and the other area is to avoid the reflection of ambient light by applying black oil, as shown in fig. 1 and 2, and the size of the LEDs is limited, and in the pixel array formed by such pixel units, the black areas in the adjacent pixel units can present a concentrated state with a large area, and in this state, the human eyes can easily distinguish the black areas, so that the display effect shows a remarkable graininess.

Disclosure of Invention

The application provides a pixel array and a display device capable of avoiding particle feeling during display.

The technical scheme provided by the application is as follows:

the pixel array comprises a plurality of pixel units and a plurality of light emitting units, wherein one light emitting unit is arranged in each pixel unit, each light emitting unit comprises M LEDs, the pixel units form a plurality of repeated pixel unit groups, each pixel unit group comprises N pixel units, the pixel area in each pixel unit group is divided into M N virtual subareas with equal areas, the virtual subareas are not overlapped with each other, and each virtual subarea is internally provided with one LED, wherein M and N are positive integers.

Further, each pixel unit group includes at least two pixel units.

Further, each pixel unit group includes two pixel units, and each light emitting unit includes three LEDs.

Further, in one pixel unit group, the pixel area of each pixel unit is divided into three virtual subareas, and the LEDs in the virtual subareas with the same shape are arranged at the central positions of the corresponding virtual subareas.

Further, each LED is arranged at the center position of the corresponding virtual subarea.

Further, in one of the pixel unit groups, six of the LEDs are arranged in an array in a 2×3 manner, and one of the LEDs in each of the light emitting units spans two of the pixel units.

Further, the pixel area in each pixel unit group is divided into six virtual sub-areas with the same shape, and each LED is arranged at the center position of the corresponding virtual sub-area.

Further, each of the light emitting units includes three LEDs, which are red LEDs, green LEDs, and blue LEDs, respectively.

Further, the display device includes the above pixel array.

The beneficial effects of the application are as follows: in the pixel array of the application, the pixel area in each pixel unit group is divided into M+N virtual subareas with the same area, and each virtual subarea is internally provided with one LED.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram showing a pixel cell of a prior art MLED display device in comparison with a pixel cell of an LCD display device;

FIG. 2 is a schematic diagram of a pixel array of a prior art MLED display device;

FIG. 3 is a schematic diagram of a pixel cell set in a pixel array according to the present application;

FIG. 4 is a schematic diagram of a pixel array in accordance with a first embodiment of the application;

fig. 5 is a schematic diagram of a pixel array in a second embodiment of the application.

Reference numerals illustrate:

pixel array	100
		Pixel unit group	101
Virtual subregion	102
		Ink area	103
Pixel unit	10
		Light-emitting unit	20
LED	21

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application. Furthermore, it should be understood that the specific embodiments described herein are for purposes of illustration and explanation only, and are not intended to limit the present application. In the present application, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.

The present application provides a pixel array and a display device including the same, which is mainly directed to improvement of MLED. The pixel array comprises a plurality of pixel units and a plurality of light emitting units, wherein one light emitting unit is arranged in each pixel unit, each light emitting unit comprises M LEDs, a plurality of pixel units form a plurality of repeated pixel unit groups, each pixel unit group comprises N pixel units, the pixel area in each pixel unit group is divided into M virtual subareas with the same area, the virtual subareas are not overlapped with each other, and each virtual subarea is internally provided with one LED, wherein M and N are positive integers. The display device includes the pixel array.

In the pixel array of the application, the pixel area in each pixel unit group is divided into M+N virtual subareas with the same area, and each virtual subarea is internally provided with one LED.

Specific embodiments and principles of the pixel array provided by the present application are described in detail below.

Referring to fig. 1 and 2, fig. 1 is a schematic diagram showing a comparison between a pixel unit of a prior art MLED display device and a pixel unit of an LCD display device, and fig. 2 is a schematic diagram showing a pixel array of the prior art MLED display device. As can be seen from the figure, since the LCD display device is a light-transmissive display type and can uniformly project the backlight in any area of the opening, the LCD display device exhibits uniform light intensity in a region of 70% or more of the pixel area; the MLED display device is limited by the size of the LED, and only about 20-30% of the area emits light under a larger pixel area, and the other area does not emit light, so that the light intensity is extremely uneven in the whole pixel area, and meanwhile, in the pixel array formed by the pixel units, the non-light-emitting areas in the adjacent pixel unit areas can present a large-area concentrated state, and in this state, the non-light-emitting areas can be easily distinguished by human eyes, so that the display effect is obvious in granular sense.

Referring to fig. 3, the pixel array 100 provided by the present application includes a plurality of pixel units 10 and a plurality of light emitting units 20, wherein each of the pixel units 10 is provided with one of the light emitting units 20. Each light emitting unit 20 comprises M LEDs 21, a plurality of pixel units 10 form a plurality of repeated pixel unit groups 101, each pixel unit group 101 comprises N pixel units 10, the pixel area in each pixel unit group 101 is divided into m×n virtual sub-areas 102 with equal areas, the virtual sub-areas 102 are not overlapped with each other, and each virtual sub-area 102 is internally provided with one LED21, wherein M and N are positive integers.

It should be noted that the above-mentioned virtual sub-area 102 is only a virtual division of the pixel area in the pixel unit group 101 for describing the distribution of the LEDs 21, and there is no meaning of actual division, and meanwhile, the shape of the virtual sub-area 102 is not limited, and any shape, both regular geometric patterns and irregular patterns, are within the scope of the present application.

Compared with the centralized arrangement of LEDs in a single pixel unit in the prior art, in the pixel array, the pixel area in each pixel unit group is divided into M+N virtual subareas with equal areas, and one LED is arranged in each virtual subarea, namely, the LEDs in each pixel unit group are dispersed in the corresponding pixel area in a form of a star, so that the condition that the non-luminous areas in the pixel array are concentrated in a large area is avoided, the granular sensation is avoided during display, and the display effect of the granular sensation is effectively improved.

Preferably, the non-light-emitting area in the pixel area of the pixel array 100 is coated with black ink to avoid reflection of ambient light, and for convenience of description, the area coated with black ink is defined as an ink area 103.

Preferably, each LED21 is disposed at a central position of the corresponding virtual sub-area 102, so that the LEDs 21 can be further "uniformly distributed" to better achieve the effect of "star-of-the-sky".

Preferably, each pixel unit group 101 includes at least two pixel units 10, and a single LED21 may be located in one of the pixel units 10 completely, or may span between 2 adjacent pixel units, as long as it is satisfied that one light emitting unit 20 is disposed in each pixel unit 10. Correspondingly, the virtual sub-area 102 may include only a partial area of one pixel unit 10, or may include at least 2 partial areas of adjacent pixel units 10 at the same time, so that the LEDs 21 may be further "uniformly distributed, and the effect of" all-over-the-sky "is better achieved.

On the basis of improving the effect of displaying the particle sense, the light-emitting unit 20 of the application can adopt a setting mode of RGB three-color LEDs or a combination mode of UV blue LEDs and a light-emitting medium so as to realize the colorized display effect of the display device.

In the MLED display device, for example, a Micro LED display device, the process generally transfers a large amount of LED arrays on a substrate to a substrate on which a driving circuit has been fabricated, and sprays black oil on a non-light-emitting area. The pixel array 100 of the present application may be modified in some other ways to facilitate the manufacturing process, as described below, based on the improved particle perception.

Referring to fig. 4, a schematic diagram of a pixel array according to a first embodiment of the application is shown. In the first embodiment, each of the pixel unit groups 101 includes two of the pixel units 10, and each of the light emitting units 20 includes three of the LEDs 21. In one of the pixel unit groups 101, the pixel area of each pixel unit 10 is divided into three virtual sub-areas 102, at least two of the three virtual sub-areas 102 have the same shape, and the LEDs 21 in the virtual sub-areas 102 having the same shape are disposed at the center positions of the corresponding virtual sub-areas 102. Preferably, the LEDs 21 in the further virtual sub-area 102 are also provided in their central positions corresponding to the virtual sub-area 102.

In this way, the LEDs 21 in the virtual sub-areas 102 with the same shape in each pixel unit group 101 may control the macro transfer by using the same driving program, and the LEDs 21 in the other virtual sub-areas 102 may control the macro transfer by using another driving program. Thus, the process of mass transfer can be simplified to some extent compared to other irregular virtual divisions.

In addition, in the present embodiment, the three LEDs 21 are red LEDs, green LEDs, and blue LEDs, respectively. In this embodiment, red LEDs and blue LEDs are arranged in the virtual sub-area 102 having the same shape. It will be appreciated that in other embodiments, the positions of the RGB three colors may be reversed as desired.

Fig. 5 is a schematic diagram of a pixel array according to a second embodiment of the application. In the second embodiment, each of the pixel unit groups 101 includes two of the pixel units 10, and each of the light emitting units 20 includes three of the LEDs 21. Within one of the pixel cell groups 101, six of the LEDs 21 are arranged in an array in a 2×3 manner, and one of the LEDs 21 in each of the light emitting units 20 spans two of the pixel cells 10. In this way, the ink area 103 in each pixel unit 10 is formed by the oil paths intersecting longitudinally and transversely, which can simplify the black oil spraying process to some extent.

In the present embodiment, the three LEDs 21 are red LEDs, green LEDs, and blue LEDs, respectively. In this embodiment, the green LEDs span across two of the pixel cells 10. It will be appreciated that in other embodiments, the positions of the RGB three colors may be reversed as desired.

Preferably, in the present embodiment, the pixel area in each pixel unit group 101 is divided into six virtual sub-areas 102 with the same shape, and each LED21 is disposed at a central position corresponding to the virtual sub-areas.

In summary, although the present application has been described in terms of the preferred embodiments, the preferred embodiments are not limited to the above embodiments, and various modifications and changes can be made by one skilled in the art without departing from the spirit and scope of the application, and the scope of the application is defined by the appended claims.

Claims

1. The pixel array is applied to an MLED display device, and is characterized by comprising a plurality of pixel units and a plurality of light emitting units, wherein one light emitting unit is arranged in each pixel unit, each light emitting unit comprises three LEDs, the pixel area of each pixel unit is divided into three virtual subareas with equal area, the virtual subareas are not overlapped with each other, one LED is arranged in each virtual subarea, the three virtual subareas of each pixel unit are a first virtual subarea, a second virtual subarea and a third virtual subarea, the first virtual subarea and the second virtual subarea are arranged side by side in a first direction, the whole of the first virtual subarea and the second virtual subarea and the third virtual subarea are arranged side by side in a second direction, and the first direction is perpendicular to the second direction; the pixel units form a plurality of repeated pixel unit groups, each pixel unit group comprises two pixel units which are arranged side by side along the second direction, the two pixel units of each pixel unit group are respectively a first pixel unit and a second pixel unit, and the third virtual subarea of the first pixel unit and the third virtual subarea of the second pixel unit in the same pixel unit group are adjacently arranged.

2. The pixel array of claim 1, wherein each of the LEDs is disposed at a center position of the corresponding virtual sub-area.

3. The pixel array of claim 1, wherein the entire LED in each of the third virtual sub-areas is formed by a combination of two LEDs across the first pixel cell and the second pixel cell within the same group of pixel cells.

4. The pixel array of claim 1, wherein each of the light emitting units includes three LEDs, which are red, green and blue LEDs, respectively.

5. A display device comprising the pixel array according to any one of claims 1-4.