Pixel arrangement structure for solving large-viewing-angle color cast phenomenon of COB display module

Abstract

The utility model relates to the technical field of COB display modules, in particular to a pixel arrangement structure for solving the large-view-angle color cast phenomenon of the COB display module, the COB display module comprises a plurality of pixels distributed on a welding plate in an array mode, each pixel comprises a light-emitting chip of at least one primary color, and the light-emitting chips are arranged on the welding plate. The positive electrode side light-emitting quantity and the negative electrode side light-emitting quantity of the light-emitting chips of at least one primary color are different, and the positive electrodes and the negative electrodes of the adjacent light-emitting chips with different light-emitting quantities in transverse distribution and / or longitudinal distribution are alternately arranged, so that the light-emitting quantities of the two sides of the COB display module observed at a large visual angle are basically consistent; therefore, the large-viewing-angle color cast phenomenon of the COB display module is greatly reduced.

Description

Technical Field

[0001] This application claims priority to the utility model patent application with application number 2023217496244 filed on July 5, 2023, entitled "A pixel arrangement structure for solving the color cast phenomenon of COB display module with large viewing angle". This application discloses a pixel arrangement structure, which belongs to the technical field of COB display module, and specifically relates to a pixel arrangement structure for solving the color cast phenomenon of COB display module with large viewing angle. Background Art

[0002] The COB display module mainly includes components such as soldering plates (such as PCB boards), pixels, and driving units (such as driver ICs). Among them, pixels are light-emitting chips or packages of single / multiple light-emitting chips. Light-emitting chips are usually composed of N-type semiconductor layers, light-emitting layers, P-type semiconductor layers, positive electrodes, and negative electrodes. The positive electrodes and negative electrodes are distributed on both sides of the light-emitting chip to avoid interference with each other and facilitate connection with the substrate. Figure 1 , Figure 2 However, in the currently commonly used light-emitting chips, there is a problem that the light output on the positive electrode side (i.e., the luminous intensity on the positive electrode side) is inconsistent with the light output on the negative electrode side (i.e., the luminous intensity on the negative electrode side).

[0003] In traditional COB display modules, the positive and negative electrodes of the light-emitting chips on both sides of the same gap are arranged opposite to each other. Figure 3 When the above-mentioned light-emitting chip is applied to the COB display module, since the light output on the positive electrode side is inconsistent with the light output on the negative electrode side, when the COB display module is lit, the surface of the COB display module is prone to color cast and other phenomena when observed from a wide viewing angle. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present application provides a pixel arrangement structure, which can solve the color cast problem of the COB display module at a large viewing angle.

[0005] The technical solutions adopted in this application are as follows:

[0006] A pixel arrangement structure for solving the color cast phenomenon of a COB display module at a large viewing angle, characterized in that the COB display module includes a plurality of red light chips, green light chips and blue light chips;

[0007] The red light chip, green light chip and blue light chip are arranged equidistantly in the horizontal and vertical directions and welded on the welding plate;

[0008] The red light chip, green light chip and blue light chip are all light-emitting chips.

[0009] Its further characteristic is that

[0010] The light output on the positive electrode side of the light-emitting chip of at least one primary color is different from the light output on the negative electrode side, and the positive electrodes and negative electrodes of adjacent light-emitting chips of the same primary color with different lateral and / or longitudinal distributions are alternately arranged, or the positive electrodes and negative electrodes of adjacent light-emitting chips with different lateral and / or longitudinal distributions are alternately arranged.

[0011] Furthermore, the red light chip, green light chip and blue light chip are welded on the welding plate in an alternating arrangement along the longitudinal direction and in a uniform arrangement along the transverse direction. The positive electrodes and negative electrodes of adjacent red light chips distributed transversely and longitudinally are welded on the welding plate in a reversed manner.

[0012] Furthermore, the red light chip, green light chip and blue light chip are welded on the welding plate in an alternating arrangement along the longitudinal direction and in a uniform arrangement along the transverse direction, and the positive electrodes and negative electrodes of adjacent red light chips, green light chips and blue light chips distributed transversely and longitudinally are welded on the welding plate in a reversed manner.

[0013] Furthermore, the red light chip, green light chip and blue light chip are welded on the welding plate in an alternating manner in the horizontal and vertical directions, and the positive electrodes and negative electrodes of adjacent red light chips, green light chips and blue light chips distributed in the horizontal and vertical directions are welded on the welding plate in a reverse manner.

[0014] A pixel arrangement structure for solving the color cast phenomenon at a large viewing angle of a COB display module, characterized in that the COB display module includes a welding plate, a plurality of pixels arranged in an array on the welding plate, each of the pixels includes a light-emitting chip of at least one primary color, the light output on the positive electrode side of the light-emitting chip of at least one primary color is different from the light output on the negative electrode side, the positive electrodes and negative electrodes of adjacent light-emitting chips of the same primary color with different light outputs in lateral and / or longitudinal distributions are alternately arranged, or the positive electrodes and negative electrodes of adjacent light-emitting chips with different light outputs in lateral and / or longitudinal distributions are alternately arranged.

[0015] Its further characteristic is that

[0016] Each of the pixels includes three light-emitting chips of different primary colors, and the light-emitting chips of different primary colors are sequentially arranged at intervals in the horizontal direction and / or the vertical direction.

[0017] Furthermore, each of the pixels includes four light-emitting chips, and the four light-emitting chips are arranged in a 2*2 matrix.

[0018] Furthermore, the four light-emitting chips include: three light-emitting chips with different primary colors and one brightness compensation chip.

[0019] Furthermore, the intervals between two adjacent light-emitting chips are equal.

[0020] Furthermore, the three light-emitting chips with different primary colors are: a red light chip, a green light chip, and a blue light chip.

[0021] Furthermore, the welding board is a PCB board or a chip adapter board.

[0022] Furthermore, the light-emitting chip is a Micro LED chip or a Mini LED chip.

[0023] Beneficial effect: In the COB display module of the present application, the light output on the positive electrode side of at least one primary color light-emitting chip is different from the light output on the negative electrode side, and the positive electrode and the negative electrode of adjacent light-emitting chips of the same primary color with different light output are alternately arranged, so that the light output on both sides of the COB display module observed at a wide viewing angle is basically the same, thereby greatly reducing the color cast phenomenon of the COB display module at a wide viewing angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of a top view of a blue light chip or a green light chip;

[0025] Figure 2 This is a schematic diagram of the structure of a red light chip viewed from above;

[0026] Figure 3 This is a schematic diagram of a top view structure in which the positive electrodes and negative electrodes of the light-emitting chips on both sides of the same gap are arranged opposite to each other in a traditional COB display module;

[0027] Figure 4 This is a schematic diagram of a top view of the pixel arrangement structure of the COB display module of the present application;

[0028] Figure 5 This is a schematic diagram of a top view of a second embodiment of the pixel arrangement structure of a COB display module of the present application;

[0029] Figure 6 The light output of the positive electrode side and the negative electrode side of the red light chip are inconsistent, while the light output of the positive electrode side and the negative electrode side of the blue light chip, green light chip, and brightness compensation chip are consistent. This is a top view of the pixel arrangement structure of the COB display module before the improvement;

[0030] Figure 7 This is a schematic diagram of the top view of the pixel arrangement structure of the COB display module of the present application;

[0031] Figure 8 This is a schematic diagram of a top view of a fourth embodiment of the pixel arrangement structure of a COB display module of the present application;

[0032] Fig. 9 This is a schematic diagram of a top view of a fifth embodiment of the pixel arrangement structure of a COB display module of the present application;

[0033] Fig.10 This is a schematic diagram of a top view of an embodiment of a pixel arrangement structure of a COB display module of the present application;

[0034] Fig.11 This is a schematic diagram of a top view of a sixth embodiment of the pixel arrangement structure of a COB display module of the present application;

[0035] Fig.12 This is a top view of another embodiment of the pixel arrangement structure of the COB display module of the present application.

[0036] Description of the drawings: pixel 1, red light chip 101, green light chip 102, blue light chip 103, brightness compensation chip 104. DETAILED DESCRIPTION

[0037] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0038] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0039] In the currently commonly used light-emitting chips, due to defects in the cutting process or electrode structure design, there is often a problem of inconsistency between the light output on the positive electrode side and the light output on the negative electrode side. For example, in order to facilitate quick identification of the positive electrode and the negative electrode during installation, the positive electrode and the negative electrode are often designed to have different shapes. The positive electrode (indicated by "+" in the attached figure) and the negative electrode (indicated by "-" in the attached figure) have different shapes, which makes the light reflection or emission angle different, resulting in the problem of inconsistency between the light output on the positive electrode side and the light output on the negative electrode side. Figure 1 , Figure 2 Provided are two structural schematic diagrams of light-emitting chips with different shapes of positive electrodes and negative electrodes.

[0040] When the above-mentioned light-emitting chip is applied to a display module, for example, a single pixel 1 is composed of a red light chip 101 (i.e., an R red light chip), a green light chip 102 (i.e., a G green light chip), and a blue light chip 103 (i.e., a B blue light chip) along the longitudinal direction (reference Figure 3) are arranged in sequence, the positive electrodes and negative electrodes of the light-emitting chips on both sides of the same gap are arranged oppositely, when the light output on the positive electrode side of the red light chip 101, the green light chip 102, and the blue light chip 103 is the same as the light output on the negative electrode side, the light colors are mixed to present white light, but if the light output on the positive electrode side of the red light chip is higher than the light output on the negative electrode side, for example, the light output on the positive electrode side is 110mcd, and the light output on the negative electrode side is 96mcd, while the light output on the positive electrode side of the blue light chip 103 and the green light chip 102 is the same as the light output on the negative electrode side, the light output on the positive electrode side and the light output on the negative electrode side of the blue light chip 103 are both 21mcd, and the light output on the positive electrode side and the light output on the negative electrode side of the green light chip 102 are both 36mcd. In this case, when observing from a wide angle from the positive electrode side of the light emitting chip of the COB display module, the light output from the positive electrode side of the red light chip 101, the green light chip 102 and the blue light chip 103 in the COB display module is mixed, showing a reddish phenomenon.

[0041] Taking the example that the light output on the positive electrode side of the red light chip 101 is different from the light output on the negative electrode side, but the light output on the positive electrode side of the blue light chip 103 is the same, several specific embodiments of the pixel arrangement structure for solving the large viewing angle color cast phenomenon of the above-mentioned COB display module are disclosed below. Embodiment 1

[0042] like Figure 4 As shown, the first arrangement method of the present application is to swap the positive electrode and the negative electrode of the red light chip 101 in a certain pattern. Specifically, the red light chip 101, the green light chip 102 and the blue light chip 103 are welded on a welding plate (not shown in the figure) in an alternating arrangement along the longitudinal direction, and are welded on the welding plate in a uniform arrangement along the transverse direction, that is, the red light chip 101, the green light chip 102, and the blue light chip 103 are arranged in sequence in the longitudinal direction; the positive electrodes and negative electrodes of adjacent red light chips 101 distributed in the transverse direction and in the longitudinal direction are welded on the welding plate in a swapped manner (i.e., alternating manner).

[0043] It should be noted that in the first embodiment, the interval between two adjacent light-emitting chips is not specifically limited, and the two adjacent light-emitting chips may be arranged at equal intervals. In another embodiment, the two adjacent light-emitting chips may be arranged at unequal intervals.

[0044] In addition, it needs to be further explained that in embodiment one, the positive electrode and the negative electrode of adjacent red light chips 101 distributed laterally are swapped, and the positive electrode and the negative electrode of adjacent red light chips 101 distributed longitudinally are swapped. In another embodiment, only the positive electrode and the negative electrode of adjacent red light chips 101 distributed laterally may be swapped, or only the positive electrode and the negative electrode of adjacent red light chips 101 distributed longitudinally may be swapped.

[0045] The following is a specific embodiment in which two adjacent light-emitting chips are arranged at unequal intervals and the positive electrodes and negative electrodes of adjacent red light chips 101 distributed laterally are swapped. Embodiment 2

[0046] The red light chip 101, the green light chip 102, and the blue light chip 103 are arranged in sequence in the longitudinal direction. The positive electrodes and negative electrodes of the adjacent red light chips 101 distributed in the transverse direction are welded on the welding plate in a swapped manner (i.e., in an alternating manner). That is, the same electrodes of the adjacent red light chips 101 distributed in the transverse direction are arranged opposite to each other. The spacing a between two adjacent light-emitting chips in the same pixel is equal. The row-wise gap width H between two adjacent pixels 1 and the column-wise gap width L between two adjacent pixels 1 are both greater than the spacing a. Figure 5 . Embodiment 3

[0047] Each pixel 1 in the COB display module includes four light-emitting chips: a red light chip 101, a green light chip 102, a blue light chip 103, and a brightness compensation chip 104. In this embodiment, the brightness compensation chip 104 is a second green light chip, which is used to increase the brightness of a single pixel. The four light-emitting chips in the same pixel are distributed in a 2*2 matrix, and the spacing between two adjacent light-emitting chips is equal.

[0048] Before the pixel arrangement structure of the COB display module was improved, the positive electrodes and negative electrodes of the light-emitting chips on both sides of the same gap were arranged opposite to each other. Figure 6 The amount of light emitted from the positive electrode side of the red light chip 101 is different from that from the negative electrode side, while the amount of light emitted from the positive electrode side of the green light chip 102, the blue light chip 103, and the brightness compensation chip 104 is the same as that from the negative electrode side. The same problem of color cast at a large viewing angle exists on both sides of the COB display module.

[0049] To solve the above problem, the pixel arrangement structure of the COB display module of the third embodiment is as follows: the positive electrode and the negative electrode of some red light chips 101 are swapped, such as Figure 7 As shown, the positive electrodes and the negative electrodes of adjacent red light chips 101 distributed laterally and vertically are arranged alternately.

[0050] It should be noted that, in another embodiment, only the positive electrodes and the negative electrodes of adjacent red light chips 101 distributed laterally are alternately arranged (that is, the same electrodes of adjacent red light chips 101 distributed laterally are arranged relatively to each other), that is, the same electrodes of two red light chips 101 distributed on both sides of the same brightness compensation chip 104 are arranged relatively to each other; or only the positive electrodes and the negative electrodes of adjacent red light chips 101 distributed longitudinally are alternately arranged.

[0051] In the above embodiment, the positive electrodes and negative electrodes of adjacent red light chips 101 distributed laterally and / or vertically are alternately arranged, so that the light output on both sides of the COB display module can be compensated respectively, so that the total light output on the side where the positive electrode of the blue light chip / green light chip of the COB display module is located is maintained in the same range as the total light output on the side where the negative electrode of the blue light chip / green light chip of the COB display module is located, thereby solving the problem of color cast at a large viewing angle of the COB display module.

[0052] It should be noted that, in another embodiment, if the light output on the positive electrode side of the green light chip 102 or the blue light chip 103 is different from the light output on the negative electrode side, a method similar to the above-mentioned embodiments 1 to 3 may also be adopted. Accordingly, the electrode positions of some green light chips 102 or blue light chips 103 are swapped, so that the positive electrodes and negative electrodes of adjacent green light chips 102 with different lateral and / or longitudinal light outputs are alternately arranged, or the positive electrodes and negative electrodes of adjacent blue light chips 103 with different lateral and / or longitudinal light outputs are alternately arranged, and the positive electrodes and negative electrodes of the remaining light-emitting chips with the same light output on the positive electrode side and the same light output on the negative electrode side are arranged in a unified manner (for example, the positive electrodes of the remaining light-emitting chips are all located on the left side of the light-emitting chips in the column, and the negative electrodes of the remaining light-emitting chips are all located on the right side of the light-emitting chips in the column), which can also solve the color cast problem of the COB display module at a large viewing angle.

[0053] In the COB display module, there may also be a situation where the light output on the positive electrode side and the light output on the negative electrode side of multiple light-emitting chips in the same pixel 1 are different. For example, the light output on the positive electrode side of each light-emitting chip in the same pixel is greater than the light output on the negative electrode side, the positive electrodes of the light-emitting chips in the same column are all located on the left side, and the negative electrodes of the light-emitting chips in the same column are all located on the right side. When observed at a wide viewing angle, the total light output on the side where the positive electrode of the light-emitting chip of the COB display module is located is greater than the light output on the side where the negative electrode of the light-emitting chip is located, and there is inconsistent color rendering on both sides of the COB display module: the light color on one side is darker (or the brightness is brighter), and the light color on the other side is lighter (or the brightness is darker), resulting in color cast at a wide viewing angle.

[0054] Taking the case where the light output from the positive electrode side and the light output from the negative electrode side of the light emitting chip in the same pixel are different as an example, several specific embodiments of the pixel arrangement structure for solving the large viewing angle color cast problem of the COB display module are disclosed below. Embodiment 4

[0055] like Figure 8As shown, in order to avoid the problem of color cast when observing the COB display module at a wide viewing angle due to the different side light outputs of the green chip 102, the blue chip 103, and the red chip 101 (i.e., the light output on the positive electrode side and the light output on the negative electrode side), this embodiment is used to avoid the problem of color cast when observing the COB display module at a wide viewing angle. In the design stage, the red chip 101, the green chip 102, and the blue chip 103 are all welded in the welding plate in an alternating manner between the positive electrode and the negative electrode. Specifically, the red chip 101, the green chip 102, and the blue chip 103 are welded on the welding plate in an alternating manner along the longitudinal direction, and are welded on the welding plate in a uniform manner along the transverse direction, that is, the red chip 101, the green chip 102, and the blue chip 103 are arranged in sequence in the longitudinal direction.

[0056] The positive electrodes and negative electrodes of the adjacent red light chips 101 , green light chips 102 and blue light chips 103 that are distributed laterally and longitudinally are welded on the welding plate in a reversed manner (ie, the positive electrodes and the negative electrodes are alternately welded). Embodiment 5

[0057] like Fig. 9 As shown, the red light chip 101, the green light chip 102, and the blue light chip 103 in this embodiment are the same as those in the above-mentioned fourth embodiment, and the light output amount on the positive electrode side is different from the light output amount on the negative electrode side. The difference between this embodiment and the fourth embodiment is that the red light chip 101, the green light chip 102, and the blue light chip 103 are welded on the welding plate in an alternating manner along the longitudinal direction, and are also welded on the welding plate in an alternating manner along the transverse direction, that is, the red light chip 101, the green light chip 102, and the blue light chip 103 are arranged in sequence in the longitudinal direction and in sequence in the transverse direction.

[0058] The positive electrodes and negative electrodes of adjacent light-emitting chips distributed laterally and longitudinally are welded on the welding plate in a swapped manner (ie, the positive electrodes and the negative electrodes are alternately welded).

[0059] It should be noted that, in another embodiment, the red light chip 101, the green light chip 102, and the blue light chip 103 are arranged in sequence in the longitudinal direction and in sequence in the transverse direction, and the positive electrodes and negative electrodes of the adjacent red light chips 101, the green light chips 102, and the blue light chips 103 distributed in the transverse direction and / or in the longitudinal direction are welded on the welding plate in a reversed manner (i.e., the positive electrodes and the negative electrodes are alternately welded), refer to Fig.10 . Embodiment 6

[0060] like Fig.11As shown, each pixel 1 in the COB display module includes four light-emitting chips: a red light chip 101, a green light chip 102, a blue light chip 103, and a brightness compensation chip 104, wherein the brightness compensation chip 104 is a second green light chip, which is used to increase the brightness of a single pixel. The four light-emitting chips in the same pixel are distributed in a 2*2 matrix, and the spacing between two adjacent light-emitting chips is equal. The improved pixel arrangement of this embodiment is as follows: the positive electrodes and negative electrodes of the adjacent red light chips 101, green light chips 102, blue light chips 103, and brightness compensation chips 104 distributed horizontally are alternately arranged, that is, the same electrodes of the adjacent light-emitting chips of the same primary color distributed horizontally and vertically are arranged relative to each other.

[0061] It should be noted that, in another embodiment, each pixel 1 in the COB display module includes four light-emitting chips: a red light chip 101, a green light chip 102, a blue light chip 103, and a brightness compensation chip 104, wherein the brightness compensation chip 104 is a second green light chip, which is used to enhance the brightness of a single pixel. The four light-emitting chips in the same pixel are distributed in a 2*2 matrix, and the spacing between two adjacent light-emitting chips is equal. The difference between this embodiment and the sixth embodiment is that the positive electrodes and negative electrodes of adjacent light-emitting chips distributed horizontally and / or vertically are alternately arranged, referring to Fig.12 .

[0062] In the above embodiments, the positive electrodes and negative electrodes of adjacent light-emitting chips that are distributed laterally and / or vertically are alternately arranged, or the positive electrodes and negative electrodes of adjacent light-emitting chips of the same primary color that are distributed laterally and / or vertically but have different light output amounts are alternately arranged, so that the light output amounts on both sides of the COB display module can be compensated respectively, so that the total light output amount on the side where the positive electrode of the blue light chip / green light chip of the COB display module is located is maintained in the same range as the total light output amount on the side where the negative electrode of the blue light chip / green light chip of the COB display module is located, thereby solving the problem of color cast at a large viewing angle of the COB display module.

[0063] In the above-mentioned Embodiment 1, Embodiment 2, Embodiment 4 and Embodiment 5, a single pixel 1 in the COB display module includes three light-emitting chips of different primary colors: a red light chip 101, a green light chip 102 and a blue light chip 103, and the red light chip 101, the green light chip 102 and the blue light chip 103 are all welded to the welding plate.

[0064] In the above-mentioned Embodiment 3 and Embodiment 6, a single pixel 1 in the COB display module includes three light-emitting chips of different primary colors and one brightness compensation chip: a red light chip 101, a green light chip 102, a blue light chip 103, and a brightness compensation chip 104. The brightness compensation chip 104 is a second green light chip. The red light chip 101, the green light chip 102, the blue light chip 103, and the brightness compensation chip 104 are all welded to the welding plate.

[0065] In practical applications, in order to ensure that the light-emitting chip is lit or extinguished, the light-emitting chip is often electrically connected to a driving unit (such as a driving IC), and the corresponding light-emitting chip is controlled by the driving IC.

[0066] It should be noted that in the present application, there is no specific limitation on the welding board, and the welding board can be a PCB board or a chip adapter board. For example, when the light-emitting chip is a mini LED chip, the welding board is preferably a PCB board, and the mini LED chip is electrically connected to the driver IC through the PCB board. When the light-emitting chip is a Micro LED chip, the welding board is preferably a chip adapter board, and the Micro LED chip is electrically connected to the corresponding driver IC through the chip adapter board and the PCB board.

[0067] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection created by this application.

Claims

1. A pixel arrangement structure for solving the color cast phenomenon of a COB display module at a large viewing angle, characterized in that: The COB display module is composed of a plurality of red light chips (101), green light chips (102) and blue light chips (103) arranged in combination; The red light chip (101), the green light chip (102), and the blue light chip (103) are arranged equidistantly in the transverse and longitudinal directions and are welded on a welding plate; the red light chip (101), the green light chip (102), and the blue light chip (103) are all light-emitting chips; The light output on the positive electrode side of the light-emitting chip of at least one primary color is different from the light output on the negative electrode side, and the positive electrodes and negative electrodes of adjacent light-emitting chips of the same primary color with different lateral and / or longitudinal distributions are alternately arranged, or the positive electrodes and negative electrodes of adjacent light-emitting chips with different lateral and / or longitudinal distributions are alternately arranged.

2. A pixel arrangement structure for solving the color cast phenomenon of a COB display module at a large viewing angle, the COB display module comprising a welding plate and a plurality of pixels (1) distributed in an array on the welding plate, characterized in that: Each of the pixels (1) comprises a light-emitting chip of at least one primary color, wherein the light-emitting chip is the light-emitting chip of claim 1, and the light output amount of the positive electrode side of the light-emitting chip of at least one primary color is different from the light output amount of the negative electrode side, and the positive electrodes and negative electrodes of adjacent light-emitting chips of the same primary color with different lateral and / or longitudinal distributions are arranged alternately, or the positive electrodes and negative electrodes of adjacent light-emitting chips with different lateral and / or longitudinal distributions are arranged alternately.

3. The pixel arrangement structure for solving the color cast phenomenon of the COB display module at a large viewing angle according to claim 2 is characterized in that: Each pixel (1) comprises three light-emitting chips of different primary colors: a red light chip (101), a green light chip (102), and a blue light chip (103), wherein the red light chip (101), the green light chip (102), and the blue light chip (103) are arranged in sequence and spaced apart in a horizontal direction and / or a vertical direction.

4. The pixel arrangement structure for solving the color cast phenomenon of a COB display module at a large viewing angle according to claim 2, characterized in that: Each of the pixels (1) comprises four light-emitting chips, and the four light-emitting chips are arranged in a 2*2 matrix.

5. The pixel arrangement structure for solving the color cast problem of a COB display module at a large viewing angle according to claim 4, characterized in that: The four light-emitting chips include: three light-emitting chips of different primary colors and one brightness compensation chip (104).

6. The pixel arrangement structure for preventing color cast at a large viewing angle of a COB display module according to claim 3 or 5, characterized in that: The welding board is a PCB board or a chip adapter board, and the light-emitting chip is a Micro LED chip or a Mini LED chip.

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