LED lamp beads, LED display modules and LED display screens

Abstract

The utility model provides an LED lamp bead, including four pixel units arranged in two rows and two columns, each of the pixel units including three LED chips of different light colors arranged along a first direction, the arrangement order of the LED chips of the two pixel units in the first column is the first light color, the second light color, and the third light color, and the arrangement order of the LED chips of the two pixel units in the second column is the third light color, the second light color, and the first light color. In this way, the two opposite sides of the LED lamp bead have at least two LED chips of different light colors, achieving the effect of complementary light colors without color cast, improving the problem of inconsistent color temperature when viewed from different viewing angles in the first direction, and improving the color consistency of the display. Correspondingly, the utility model also provides an LED display module and an LED display screen.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductors, and in particular to an LED lamp bead, an LED display module and an LED display screen. Background Art

[0002] LED display modules are composed of many LED lamp beads spliced ​​at a certain dot pitch. The LED lamp beads used in LED display modules are usually full-color LED lamp beads, which usually integrate red, green and blue LED chips. The three-color LED chips are arranged in a straight line. The three-color LED chips can be mixed to obtain white light, thus forming a pixel.

[0003] At present, the LED display screen is composed of multiple LED display modules. Since the arrangement order of the three light color LED chips in each full-color LED lamp bead of the LED display module is the same, the LED chips on the side of the LED display screen are all the same color (for example, the LED chips on the upper side of the LED display screen are all red, and the LED chips on the lower side of the LED display screen are all blue). At certain viewing angles (deviating from the front of the LED display screen), the color temperature of the mixed light colors will deviate due to the different distances between the respective solid crystal positions and the light-emitting surface of the encapsulation glue layer (epoxy resin or silicone / silicone resin) of the LED lamp bead, resulting in inconsistent color temperature (color cast) when viewing the LED display screen at different viewing angles, making the display effect worse. Utility Model Content

[0004] The utility model aims to provide an LED lamp bead, an LED display module and an LED display screen to solve the problem of color cast of the existing LED display screen.

[0005] In order to achieve the above object, the utility model provides an LED lamp bead, comprising four pixel units arranged in two rows and two columns, wherein the direction of each column is a first direction, the direction of each row is a second direction, and the first direction is perpendicular to the second direction;

[0006] Each of the pixel units includes three LED chips of different light colors arranged along the first direction, and the arrangement order of the LED chips of the two pixel units in the first column is the first light color, the second light color, and the third light color, and the arrangement order of the LED chips of the two pixel units in the second column is the third light color, the second light color, and the first light color.

[0007] Optionally, in two pixel units in the same row in the second direction, the distance between the two LED chips of the i-th light color in the second direction is H i, in the two pixel units in the same column in the first direction, the distance between the two LED chips of the i-th light color in the first direction is W i , and H i =W i , i is one, two or three.

[0008] Optionally, a virtual line connecting the centers of the three LED chips of the pixel unit is a straight line extending along the first direction, an oblique line or a broken line inclined relative to the first direction.

[0009] Optionally, the four pixel units form a centrally symmetrical structure.

[0010] Optionally, the first light color, the second light color and the third light color are respectively any one of red light, blue light and green light.

[0011] The present invention further provides an LED display module, comprising m rows and n columns of display units, m and n are greater than or equal to 1, and m*n is not equal to 1, each of the display units comprises four pixel units arranged in two rows and two columns, wherein the direction of each column is a first direction, the direction of each row is a second direction, and the first direction is perpendicular to the second direction;

[0012] Each of the pixel units includes three LED chips of different light colors arranged along the first direction, and the arrangement order of the LED chips of each of the pixel units in the first column is the first light color, the second light color, and the third light color, and the arrangement order of the LED chips of each of the pixel units in the second column is the third light color, the second light color, and the first light color.

[0013] Optionally, in two adjacent pixel units in the same row in the second direction, the distance between the two LED chips of the i-th light color in the second direction is H i In two adjacent pixel units in the same column in the first direction, the distance between the two LED chips of the i-th light color in the first direction is W i , and H i =W i , i is one, two or three.

[0014] Optionally, a virtual line connecting the centers of the three LED chips of the pixel unit is a straight line extending along the first direction, an oblique line or a broken line inclined relative to the first direction.

[0015] Optionally, the four pixel units form a centrally symmetrical structure.

[0016] Optionally, the first light color, the second light color and the third light color are respectively any one of red light, blue light and green light.

[0017] Optionally, each of the display units is composed of one four-in-one LED lamp bead, each of the four-in-one LED lamp bead includes four pixel units arranged in two rows and two columns, each of the pixel units includes three LED chips of different light colors arranged along the first direction, and the arrangement order of the LED chips of each pixel unit in the first column is the first light color, the second light color, and the third light color, and the arrangement order of the LED chips of each pixel unit in the second column is the third light color, the second light color, and the first light color.

[0018] Optionally, each of the display units is composed of two two-in-one LED lamp beads, the two two-in-one LED lamp beads are arranged along the second direction, each of the two-in-one LED lamp beads includes two pixel units arranged along the first direction, the arrangement order of the LED chips of each pixel unit of one of the two-in-one LED lamp beads is the first light color, the second light color, and the third light color, and the arrangement order of the LED chips of each pixel unit of the other two-in-one LED lamp bead is the third light color, the second light color, and the first light color; or,

[0019] Each of the display units is composed of two two-in-one LED lamp beads, and the two two-in-one LED lamp beads are arranged along the first direction. Each of the two-in-one LED lamp beads includes two pixel units arranged along the second direction. The arrangement order of the LED chips of one pixel unit of each of the two-in-one LED lamp beads is the first light color, the second light color, and the third light color, and the arrangement order of the LED chips of the other pixel unit is the third light color, the second light color, and the first light color.

[0020] Optionally, each of the display units is composed of four single-pixel LED lamp beads, and the four single-pixel LED lamp beads are arranged in two rows and two columns, and each of the single-pixel LED lamp beads includes a pixel unit, and the arrangement order of the LED chips in the pixel unit of each of the single-pixel LED lamp beads in the first column is the first light color, the second light color, and the third light color, and the arrangement order of the LED chips in the pixel unit of each of the single-pixel LED lamp beads in the second column is the third light color, the second light color, and the first light color.

[0021] Optionally, all of the LED chips are directly formed on a substrate, and a packaging adhesive layer covers the substrate and the LED chips.

[0022] Optionally, the LED display module has four sides, wherein the first side is opposite to the second side, and the third side is opposite to the fourth side;

[0023] The LED chips closest to the first side and the second side are arranged in two light colors alternately, and the LED chips closest to the third side and the fourth side are arranged in three light colors alternately;

[0024] The LED chips closest to the first side are arranged alternately with the j-th light color and the k-th light color in the direction from the third side to the fourth side, and the LED chips closest to the first side are arranged alternately with the k-th light color and the j-th light color in the direction from the third side to the fourth side; and,

[0025] The LED chips closest to the third side are arranged alternately with the j-th light color, the q-th light color, and the k-th light color in the direction from the first side to the second side, and the LED chips closest to the third side are arranged alternately with the k-th light color, the q-th light color, and the j-th light color in the direction from the first side to the second side, and j, q, and k are one of one, two, and three, respectively.

[0026] The utility model also provides an LED display screen, comprising the LED display module.

[0027] The LED lamp bead provided by the present invention includes four pixel units arranged in two rows and two columns, each of which includes three LED chips of different light colors arranged along the first direction, and the arrangement order of the LED chips of the two pixel units in the first column is the first light color, the second light color, and the third light color, and the arrangement order of the LED chips of the two pixel units in the second column is the third light color, the second light color, and the first light color. In this way, the two opposite sides of the LED lamp bead have at least two LED chips of different light colors, achieving the effect of complementary light colors without color cast, improving the problem of inconsistent color temperature when viewed from different viewing angles in the first direction, and improving the color consistency of the display. Correspondingly, the present invention also provides an LED display module and an LED display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of the LED lamp bead provided in the first embodiment of the utility model;

[0029] Figure 2 A schematic diagram of the structure of an LED display module provided in Embodiment 1 of the present utility model;

[0030] Figure 3 to Figure 5 This is a schematic diagram of the structures corresponding to the corresponding steps of the method for preparing LED lamp beads provided in the first embodiment of the utility model;

[0031] Figure 6 and Figure 7A schematic diagram of the structures of two LED lamp beads provided in the second embodiment of the utility model;

[0032] Figure 8 This is a schematic diagram of the structure of the LED lamp bead provided in the third embodiment of the utility model;

[0033] Wherein, the accompanying drawings are marked as follows:

[0034] 11, 12, 13, 14-pixel units; 10-support body; 100-bracket; 101-LED chip; 200-packaging adhesive layer; 20-substrate. DETAILED DESCRIPTION

[0035] The following will describe the specific implementation of the utility model in more detail with reference to the schematic diagram. The advantages and features of the utility model will become clearer according to the following description. It should be noted that the drawings are all in a very simplified form and are not in exact proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model.

[0036] Embodiment 1

[0037] Figure 1 This is a schematic diagram of the structure of the LED lamp beads provided in this embodiment. Figure 1 As shown, the LED lamp bead is a four-in-one LED lamp bead, including four pixel units arranged in two rows and two columns, wherein the direction of each column is the first direction, the direction of each row is the second direction, and the first direction is perpendicular to the second direction. The four pixel units are pixel unit 11, pixel unit 12, pixel unit 13, and pixel unit 14. Among them, the pixel unit 11 is located in the first row and the first column, the pixel unit 12 is located in the first row and the second column, the pixel unit 13 is located in the second row and the first column, and the pixel unit 14 is located in the second row and the second column; the pixel unit 11 and the pixel unit 12 are arranged along the second direction, and the pixel unit 13 and the pixel unit 14 are arranged along the second direction; the pixel unit 11 and the pixel unit 13 are arranged along the first direction, and the pixel unit 12 and the pixel unit 14 are arranged along the first direction.

[0038] Each of the pixel units includes three LED chips of different light colors arranged along the first direction. In this embodiment, the three light colors are one of red R, green G, and blue B. That is, each of the pixel units includes a red LED chip, a green LED chip, and a blue LED chip. The LED chip can be a flip-chip structure, a vertical structure, or a face-up structure, which is not limited by the present invention.

[0039] Furthermore, the arrangement order of the LED chips of each pixel unit in the first column is the first light color, the second light color, and the third light color, and the arrangement order of the LED chips of each pixel unit in the second column is the third light color, the second light color, and the first light color, and the first light color, the second light color and the third light color are respectively any one of red R, blue B, and green G. In this embodiment, the first light color is blue B, the second light color is green G, and the third light color is red R, but it should not be limited to this. Figure 1 In the embodiment, the arrangement order of the three light color LED chips of the pixel unit 11 and the pixel unit 13 is blue B, green G, and red R, and the arrangement order of the three light color LED chips of the pixel unit 12 and the pixel unit 14 is red R, green G, and blue B. The arrangement order of the three light color LED chips of the pixel unit 11 is opposite to that of the pixel unit 12, and the arrangement order of the three light color LED chips of the pixel unit 13 is opposite to that of the pixel unit 14. In this way, the two opposite sides (upper and lower sides) of the LED lamp bead have at least two light color LED chips (red R and blue B), achieving the effect of complementary light colors without color cast, improving the problem of inconsistent color temperature when viewed at different viewing angles in the first direction (the viewing angles indicated by the arrows in the figure), and improving the color consistency of the display.

[0040] Of course, the three light colors of the LED chips in the four pixel units in the utility model are not limited to Figure 1 For example, the arrangement order of the three light colors of the LED chips of the pixel unit 11 and the pixel unit 13 may also be green G, blue B, and red R. In this case, the arrangement order of the three light colors of the LED chips of the pixel unit 12 and the pixel unit 14 may be red R, blue B, and green G; or, the arrangement order of the three light colors of the LED chips of the pixel unit 11 and the pixel unit 13 may also be green G, red R, and blue B. In this case, the arrangement order of the three light colors of the LED chips of the pixel unit 12 and the pixel unit 14 may be blue B, red R, and green G.

[0041] Please continue reading Figure 1 In order to provide a better display effect, in this embodiment, in two pixel units in the same row in the second direction, the distance between the two LED chips of the i-th light color in the second direction is H i , in the two pixel units in the same column in the first direction, the distance between the two LED chips of the i-th light color in the first direction is W i , and H i =W i, i is 1, 2 or 3. Taking the blue LED chips in the first row and the first column as an example, the distance between the blue LED chips in the two pixel units in the first row in the second direction is H B , the distance between the blue LED chips in the two pixel units in the first column in the first direction is W B , H B =W B .

[0042] Furthermore, the four pixel units form a centrally symmetrical structure, that is, the pixel unit 11, the pixel unit 12, the pixel unit 13, and the pixel unit 14 are symmetrical along the center of the LED lamp bead.

[0043] Please continue reading Figure 1 In this embodiment, the virtual connecting line of the centers of the three LED chips of each pixel unit is a straight line extending along the first direction, that is, the centers of the three LED chips of each pixel unit are at the same position in the second direction.

[0044] Furthermore, in this embodiment, the LED lamp bead is a chip-type lamp bead, and the LED lamp bead also includes a support body 10, the LED chip is mounted on the support body 10, and the support body 10 is a substrate, and the substrate also has a packaging glue layer, and the packaging glue layer covers the substrate and the LED chip. In some embodiments, the LED lamp bead can also be a top-type lamp bead. In this case, the support body 10 is a bracket, and the top-type lamp bead also includes a bowl cup, surrounding the LED chip, and the packaging glue layer is located in the bowl cup and covers the LED chip and the bracket.

[0045] Based on this, this embodiment also provides a Figure 1 The LED display module shown is composed of four-in-one LED lamp beads. Figure 2 The schematic diagram of the structure of the LED display module provided in this embodiment is as follows: Figure 2 As shown, the LED display module includes m rows and n columns of display units, m and n are greater than or equal to 1, and m*n is not equal to 1. In this embodiment, m and n are both equal to 2, but this is not limited to this.

[0046] Furthermore, each of the display units is composed of 1 Figure 1 The LED display module is composed of 4 Figure 1 The four-in-one LED lamp beads shown are arranged in 4 Figure 1 The LED lamp beads shown are mounted on a substrate 20. At this time, the size of a single lamp in the LED display module is larger, the lamp beads have a better anti-collision effect, and the production efficiency is also higher.

[0047] from Figure 2 It can also be seen that each of the display units includes four pixel units arranged in two rows and two columns, each of the four-in-one LED lamp beads includes four pixel units arranged in two rows and two columns, each of the pixel units includes three LED chips of different light colors arranged along the first direction, and the arrangement order of the LED chips of each pixel unit in the first column is the first light color, the second light color, and the third light color (blue B, green G, red R), and the arrangement order of the LED chips of each pixel unit in the second column is the third light color, the second light color, and the first light color (red R, green G, blue B).

[0048] In this embodiment, in two adjacent pixel units in the same row in the second direction, the distance between the two LED chips of the i-th light color in the second direction is H i In two adjacent pixel units in the same column in the first direction, the distance between the two LED chips of the i-th light color in the first direction is W i , and H i =W i , i is one, two or three.

[0049] As an optional embodiment, Figure 2 Each of the display units in the LED display module can also be composed of two two-in-one LED lamp beads. The two two-in-one LED lamp beads are arranged along the second direction. At this time, the LED display module is composed of 8 two-in-one LED lamp beads arranged, and the 8 two-in-one LED lamp beads are installed on the substrate 20. Each of the two-in-one LED lamp beads includes two pixel units arranged along the first direction, and the arrangement order of the LED chips of each pixel unit of one of the two-in-one LED lamp beads is the first light color, the second light color, and the third light color, and the arrangement order of the LED chips of each pixel unit of the other two-in-one LED lamp bead is the third light color, the second light color, and the first light color. Alternatively, each of the display units may be composed of two two-in-one LED lamp beads, the two two-in-one LED lamp beads are arranged along the first direction, each of the two-in-one LED lamp beads includes two pixel units arranged along the second direction, the LED chips of one pixel unit of each of the two-in-one LED lamp beads are arranged in the order of the first light color, the second light color, and the third light color, and the LED chips of the other pixel unit are arranged in the order of the third light color, the second light color, and the first light color.

[0050] As an optional embodiment, Figure 2Each of the display units in the LED display module can also be composed of four single-pixel LED lamp beads, and the four single-pixel LED lamp beads are arranged in two rows and two columns. In this case, the LED display module is composed of 16 single-pixel LED lamp beads, and the 16 single-pixel LED lamp beads are installed on the substrate 20. Each of the single-pixel LED lamp beads includes one pixel unit, and the arrangement order of the LED chips of the pixel unit of each of the single-pixel LED lamp beads in the first column is the first light color, the second light color, and the third light color, and the arrangement order of the LED chips of the pixel unit of each of the single-pixel LED lamp beads in the second column is the third light color, the second light color, and the first light color.

[0051] Please continue reading Figure 2 The LED display module has four sides, wherein the first side and the second side are opposite to each other, and the third side and the fourth side are opposite to each other. In this embodiment, the first side and the second side are upper and lower sides respectively, and the third side and the fourth side are left and right sides respectively.

[0052] Further, the LED chips closest to the first side and the second side are arranged in alternating arrangement of two light colors, and the LED chips closest to the third side and the fourth side are arranged in alternating arrangement of three light colors. Moreover, the LED chips closest to the first side are arranged in alternating arrangement of the jth light color and the kth light color in the direction from the third side to the fourth side, and the LED chips closest to the first side are arranged in alternating arrangement of the kth light color and the jth light color in the direction from the third side to the fourth side; the LED chips closest to the third side are arranged in alternating arrangement of the jth light color, the qth light color, and the kth light color in the direction from the first side to the second side, and the LED chips closest to the third side are arranged in alternating arrangement of the kth light color, the qth light color, and the jth light color in the direction from the first side to the second side, and j, q, and k are respectively one of one, two, and three.

[0053] In this embodiment, the LED chips on the first side are arranged alternately with B color and R color (B color, R color, B color, R color), and the LED chips on the second side are arranged alternately with R color and B color (R color, B color, R color, B color). The LED chips on the third side are arranged alternately with B color, G color, and R color (B color, G color, R color, B color, G color, R color, B color, G color, R color, B color, G color, R color), and the LED chips on the second side are arranged alternately with R color, G color, and B color (R color, G color, B color, R color, G color, B color, R color, G color, B color, R color, G color, B color).

[0054] As an optional embodiment, the LED display module may also be a COB module, that is, all the LED chips may also be directly formed on the substrate 20 and packaged, and the packaging glue layer covers the substrate 20 and the LED chips to form the LED display module.

[0055] Figure 3 to Figure 5 The following is a schematic diagram of the structure corresponding to the corresponding steps of the method for preparing the LED lamp beads provided in this embodiment. Figure 3 As shown, when preparing LED lamp beads (four-in-one LED lamp beads, two-in-one LED lamp beads or single-pixel LED lamp beads), first fix the LED chip 101 on the front of the bracket 100 in a predetermined order and direction, and then electrically connect the LED chip 101 to the bracket 100 through eutectic bonding (for the LED chip with a face-up structure) or reflow eutectic welding (for the LED chip with a flip-chip structure), wherein the LED chip with a face-up structure is electrically connected to the bracket 100 through two bonding wires, the LED chip with a vertical structure is electrically connected to the bracket 100 through one bonding wire + bottom conductive glue, and the LED chip with a flip-chip structure is electrically connected to the bracket 100 through the bottom conductive glue. Figure 4 As shown, a packaging glue layer 200 is formed on the bracket 100. Figure 5 As shown, cutting is performed according to actual needs to separate the individual LED lamp beads.

[0056] Embodiment 2

[0057] Figure 6 and Figure 7 The following is a schematic diagram of the structure of two LED lamp beads provided in this embodiment. Figure 6 and Figure 7 As shown, the difference from the first embodiment is that in this embodiment, the virtual line connecting the centers of the three LED chips of the pixel unit is an oblique line inclined relative to the first direction. That is, the positions of the centers of the three LED chips of each pixel unit in the second direction are different, so that the three LED chips of the pixel unit are arranged obliquely.

[0058] Embodiment 3

[0059] Figure 8 This is a schematic diagram of the structure of the LED lamp beads provided in this embodiment. Figure 8As shown, the difference from the first embodiment is that in this embodiment, the virtual connecting line of the centers of the three LED chips of the pixel unit is a broken line. That is, the centers of the two LED chips in each pixel unit are at the same position in the second direction, and the center position of the remaining one LED chip in the second direction is different from the centers of the two LED chips in the second direction.

[0060] It should be noted that the arrangement of the three LED chips in each pixel unit of the present invention is not limited to this, but it is best to satisfy that in two adjacent pixel units in the same row in the second direction, the distance between the two LED chips of the i-th light color in the second direction is H i , in the two pixel units in the same column in the first direction, the distance between the two LED chips of the i-th light color in the first direction is W i , and H i =W i , i is one, two or three.

[0061] In summary, the LED lamp bead provided in the embodiment of the utility model includes four pixel units arranged in two rows and two columns, each of the pixel units includes three LED chips of different light colors arranged along the first direction, the arrangement order of the LED chips of the two pixel units in the first column is the first light color, the second light color, and the third light color, and the arrangement order of the LED chips of the two pixel units in the second column is the third light color, the second light color, and the first light color. In this way, the two opposite sides of the LED lamp bead have at least two LED chips of two light colors, achieving the effect of complementary light colors, without color cast, improving the problem of inconsistent color temperature when viewed from different viewing angles in the first direction, and improving the color consistency of the display. Correspondingly, the embodiment of the utility model also provides an LED display module and an LED display screen.

[0062] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0063] It should also be noted that, although the present invention has been disclosed as a preferred embodiment, the above embodiment is not intended to limit the present invention. For any technician familiar with the art, without departing from the scope of the technical solution of the present invention, the above disclosed technical content can be used to make many possible changes and modifications to the technical solution of the present invention, or modified into equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

[0064] It should also be understood that, unless otherwise specified or indicated, the terms "first", "second", "third", etc. in the specification are merely used to distinguish between the various components, elements, steps, etc. in the specification, and are not used to indicate the logical relationship or sequential relationship between the various components, elements, steps, etc.

[0065] It should also be recognized that the terms described herein are only used to describe specific embodiments and are not used to limit the scope of the utility model. It must be noted that the singular forms "one" and "a kind" used herein and in the appended claims include plural references unless the context clearly indicates the opposite meaning. For example, a reference to "a step" or "a device" means a reference to one or more steps or devices, and may include secondary steps and secondary devices. All conjunctions used should be understood in the broadest sense. And, the word "or" should be understood to have a logical "or" definition, rather than a logical "exclusive or" definition, unless the context clearly indicates the opposite meaning. In addition, the implementation of the method and / or device in the embodiment of the utility model may include performing the selected task manually, automatically, or in combination.

Claims

1. An LED lamp bead, characterized in that: It comprises four pixel units arranged in two rows and two columns, wherein the direction of each column is a first direction, the direction of each row is a second direction, and the first direction is perpendicular to the second direction; Each of the pixel units includes three LED chips of different light colors arranged along the first direction, and the arrangement order of the LED chips of the two pixel units in the first column is the first light color, the second light color, and the third light color, and the arrangement order of the LED chips of the two pixel units in the second column is the third light color, the second light color, and the first light color.

2. The LED lamp bead according to claim 1, characterized in that: In two pixel units in the same row in the second direction, the distance between the two LED chips of the i-th light color in the second direction is H i , in the two pixel units in the same column in the first direction, the distance between the two LED chips of the i-th light color in the first direction is W i , and H i =W i , i is one, two or three.

3. The LED lamp bead as claimed in claim 2, characterized in that: A virtual line connecting the centers of the three LED chips of the pixel unit is a straight line extending along the first direction, an oblique line or a broken line inclined relative to the first direction.

4. The LED lamp bead as claimed in claim 2, characterized in that: The four pixel units form a central symmetrical structure.

5. The LED lamp bead according to claim 1, characterized in that: The first light color, the second light color and the third light color are respectively any one of red light, blue light and green light.

6. An LED display module, characterized in that: Comprising m rows and n columns of display units, m and n are greater than or equal to 1, and m*n is not equal to 1, each of the display units comprises four pixel units arranged in two rows and two columns, wherein the direction of each column is a first direction, the direction of each row is a second direction, and the first direction is perpendicular to the second direction; Each of the pixel units includes three LED chips of different light colors arranged along the first direction, and the arrangement order of the LED chips of each of the pixel units in the first column is the first light color, the second light color, and the third light color, and the arrangement order of the LED chips of each of the pixel units in the second column is the third light color, the second light color, and the first light color.

7. The LED display module according to claim 6, characterized in that: In two adjacent pixel units in the same row in the second direction, the distance between the two LED chips of the i-th light color in the second direction is H. i In two adjacent pixel units in the same column in the first direction, the distance between the two LED chips of the i-th light color in the first direction is W i , and H i =W i , i is one, two or three.

8. The LED display module according to claim 7, characterized in that: A virtual line connecting the centers of the three LED chips of the pixel unit is a straight line extending along the first direction, an oblique line or a broken line inclined relative to the first direction.

9. The LED display module according to claim 7, characterized in that: The four pixel units form a central symmetrical structure.

10. The LED display module according to claim 6, characterized in that: The first light color, the second light color and the third light color are respectively any one of red light, blue light and green light.

11. The LED display module according to any one of claims 6 to 10, characterized in that: Each of the display units is composed of a four-in-one LED lamp bead, each of the four-in-one LED lamp bead includes four pixel units arranged in two rows and two columns, each of the pixel units includes three LED chips of different light colors arranged along the first direction, and the arrangement order of the LED chips of each pixel unit in the first column is the first light color, the second light color, and the third light color, and the arrangement order of the LED chips of each pixel unit in the second column is the third light color, the second light color, and the first light color.

12. The LED display module according to any one of claims 6 to 10, characterized in that: Each of the display units is composed of two two-in-one LED lamp beads, the two two-in-one LED lamp beads are arranged along the second direction, each of the two-in-one LED lamp beads includes two pixel units arranged along the first direction, the arrangement order of the LED chips of each pixel unit of one of the two-in-one LED lamp beads is the first light color, the second light color, and the third light color, and the arrangement order of the LED chips of each pixel unit of the other two-in-one LED lamp beads is the third light color, the second light color, and the first light color; or, Each of the display units is composed of two two-in-one LED lamp beads, and the two two-in-one LED lamp beads are arranged along the first direction. Each of the two-in-one LED lamp beads includes two pixel units arranged along the second direction. The arrangement order of the LED chips of one pixel unit of each of the two-in-one LED lamp beads is the first light color, the second light color, and the third light color, and the arrangement order of the LED chips of the other pixel unit is the third light color, the second light color, and the first light color.

13. The LED display module according to any one of claims 6 to 10, characterized in that: Each of the display units is composed of four single-pixel LED lamp beads, and the four single-pixel LED lamp beads are arranged in two rows and two columns. Each of the single-pixel LED lamp beads includes a pixel unit. The arrangement order of the LED chips in the pixel unit of each of the single-pixel LED lamp beads in the first column is the first light color, the second light color, and the third light color. The arrangement order of the LED chips in the pixel unit of each of the single-pixel LED lamp beads in the second column is the third light color, the second light color, and the first light color.

14. The LED display module according to any one of claims 6 to 10, characterized in that: All the LED chips are directly formed on a substrate, and a packaging adhesive layer covers the substrate and the LED chips.

15. The LED display module according to any one of claims 6 to 10, characterized in that: The LED display module has four sides, wherein the first side is opposite to the second side, and the third side is opposite to the fourth side; The LED chips closest to the first side and the second side are arranged in two light colors alternately, and the LED chips closest to the third side and the fourth side are arranged in three light colors alternately; The LED chips closest to the first side are arranged alternately with the j-th light color and the k-th light color in the direction from the third side to the fourth side, and the LED chips closest to the first side are arranged alternately with the k-th light color and the j-th light color in the direction from the third side to the fourth side; and, The LED chips closest to the third side are arranged alternately with the j-th light color, the q-th light color, and the k-th light color in the direction from the first side to the second side, and the LED chips closest to the third side are arranged alternately with the k-th light color, the q-th light color, and the j-th light color in the direction from the first side to the second side, and j, q, and k are one of one, two, and three, respectively.

16. An LED display screen, characterized in that: It comprises the LED display module as claimed in any one of claims 6 to 15.

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