CN220137883U

CN220137883U - COB display screen display unit

Info

Publication number: CN220137883U
Application number: CN202320851268.0U
Authority: CN
Inventors: 曲鹏; 李春林
Original assignee: Yuanxu Semiconductor Technology Wuxi Co ltd
Current assignee: Yuanxu Semiconductor Technology Wuxi Co ltd
Priority date: 2023-04-17
Filing date: 2023-04-17
Publication date: 2023-12-05
Anticipated expiration: 2033-04-17

Abstract

The utility model discloses a display unit, belongs to the technical field of COB (chip on board) display screens, and particularly relates to a COB display screen display unit, wherein the display unit is provided with a plurality of display units which are equidistantly arranged on a COB display screen substrate; the distance between the bonding pads at the edges of adjacent display units is larger than the distance between the LED chips in the display units, and the distance between the two display units is increased by a pixel shrinking method, so that pixels at the edge positions can have enough light emergent angles to reflect light rays, and the cyan line and yellow line phenomena between the display units are solved.

Description

COB display screen display unit

Technical Field

The utility model discloses a display unit, belongs to the technical field of COB (chip on board) display screens, and particularly relates to a display unit of a COB display screen.

Background

In the drawing design stage of the COB display unit design, the pixels at the outermost ring of the display unit are properly shrunk, and the shrinking distance does not influence the display effect of the whole COB display unit and a large screen. The pixels which cannot be refracted originally can be refracted out in space by widening the phase change of the retracted pixels from the edge position of the display unit, and the pixels are recognized by human eyes and photographic equipment.

In a conventional display unit based on the COB packaging process, pixels in the display unit are uniformly arranged (as shown in fig. 1 and 2), so that a circle of pixels at the edge in the display unit is too close to the board edge. Because COB display screen is formed by splicing a plurality of display units, therefore in the assembling process, the display module assembly and the display module assembly can have the problems of splicing height difference and the like. Resulting in a transition in the exit angle of the pixel ray at the edge. Cannot be captured by the human eye or by photographic equipment. The problems of cyan and yellow lines occur (red, green, and blue light are combined into white light, cyan light occurs in the absence of red light, and yellow light occurs in the absence of blue light).

Disclosure of Invention

The utility model aims to: the COB display screen display unit solves the problem that light rays emitted by partial pixels cannot be recognized by human eyes or photographic equipment due to splicing and the like between the COB display screen display unit and the display unit.

The technical scheme is as follows: the COB display screen display unit is provided with a plurality of display units which are equidistantly arranged on the COB display screen substrate;

the bonding pad distance at the edge of the display unit between adjacent display units is larger than the distance between the LED chips in the display unit.

In a further embodiment, the distances between the LED chips within the display unit are equal.

In a further embodiment, the display unit is composed of a bonding pad and red (R), green (G) and blue (B) LED chips bonded to the bonding pad

The distance between adjacent red (R), green (G) and blue (B) LED chips is smaller than the distance between pads at the edges of the display unit between adjacent ones.

In a further embodiment, the red (R), green (G) and blue (B) LED chips in each display unit are ordered in a manner R/G/B;

in a further embodiment, the distance between the red (R) LED chip and the green (G) LED chip and the distance between the blue (B) LED chip and the green (G) LED chip are the same, both being 0.163mm.

In a further embodiment, the distance between pads at the edges of adjacent display units is 0.253mm, i.e. the distance between the blue (B) LED chip in the previous display unit and the red (R) LED chip in the next display unit is 0.253mm.

The beneficial effects are that: the utility model discloses a display unit, belongs to the technical field of COB (chip on board) display screens, and particularly relates to a COB display screen display unit, wherein the display unit is provided with a plurality of display units which are equidistantly arranged on a COB display screen substrate; the distance between the bonding pads at the edges of adjacent display units is larger than the distance between the LED chips in the display units, and the distance between the two display units is increased by a pixel shrinking method, so that pixels at the edge positions can have enough light emergent angles to reflect light rays, and the cyan line and yellow line phenomena between the display units are solved.

Drawings

Fig. 1 is a schematic diagram of a display unit arrangement in the prior art.

FIG. 2 is a schematic diagram showing the pitch of display cells in a prior art pixel layout

Fig. 3 is a schematic diagram of an arrangement of display units according to the present utility model.

Fig. 4 is a schematic diagram of a display unit pitch of the pixel layout of the present utility model.

FIG. 5 is a schematic diagram showing the arrangement of display units according to the present utility model compared with the prior art.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The COB display screen display unit is provided with a plurality of display units which are equidistantly arranged on the COB display screen substrate;

In one embodiment, as shown in fig. 3 to 5, the distances between the LED chips in the display unit are equal.

In one embodiment, as shown in fig. 3 to 5, the display unit is composed of a pad and red (R), green (G) and blue (B) LED chips soldered to the pad

In one embodiment, as shown in fig. 3 to 5, the red (R), green (G) and blue (B) LED chips in each display unit are ordered in a manner of R/G/B;

in one embodiment, as shown in fig. 3 to 5, the distance between the red (R) LED chip and the green (G) LED chip and the distance between the blue (B) LED chip and the green (G) LED chip are the same, both being 0.163mm.

In one embodiment, as shown in fig. 3 to 5, the distance between pads at the edges of adjacent display units is 0.253mm, i.e., the distance between the blue (B) LED chip in the previous display unit and the red (R) LED chip in the next display unit is 0.253mm.

The improved method of the present utility model is specifically described below with reference to the accompanying drawings and the foregoing description:

in a conventional display unit based on the COB packaging process, pixels in the display unit are uniformly arranged, so that a circle of pixels at the edge in the display unit are too close to the board edge. Because COB display screen is formed by splicing a plurality of display units, therefore in the assembling process, the display module assembly and the display module assembly can have the problems of splicing height difference and the like. Resulting in a transition in the exit angle of the pixel ray at the edge. Cannot be captured by the human eye or by photographic equipment. The problems of cyan lines and yellow lines occur (red, green and blue light are combined into white light, blue light appears in the absence of red light, yellow light appears in the absence of blue light), as shown in fig. 1, the left red light is blocked by the right module, so that the red light is blocked, the left module appears the cyan line, the right blue light is blocked by the left module, so that the blue light is blocked, and the right module appears the yellow line;

on the premise of not influencing the display effect, the utility model increases the light emergent angle of the pixel by increasing the distance of the edge pixel, thereby solving the problems of blue lines and yellow lines;

in the drawing design process, pixels at the edge positions are contracted inwards, so that the distance between two pixels of the display unit is increased. The pixel shielding range is reduced, so that the shielded light can be refracted out and captured by human eyes and equipment, and the phenomena of blue lines and yellow lines are solved; as shown in fig. 3, red light and blue light between two display units are respectively shrunk by a certain distance, and the phase change increases the light emitting angles of the red light and the blue light. So that the phenomenon of cyan lines and yellow lines can be solved

As seen from the light emitting surface, the conventional scheme is that the distance between pixels is equal, as shown in fig. 2 (black lines are contact positions of two display units). In the scheme of the utility model, after the distance is increased, a bonding pad at the edge of the display unit is contracted by 30um, and the lighted screen is watched from the upper and lower view angles, so that the problem of cyan lines is basically solved, and as shown in fig. 4 and 5, the distance between the edge of the display unit is contracted from 0.193mm to 0.163mm. The cyan line and yellow line phenomena between the display units are solved.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. The COB display screen display unit is characterized in that the display unit is provided with a plurality of display units which are equidistantly arranged on a COB display screen substrate;

2. The COB display screen display unit of claim 1 wherein the distances between the LED chips in the display unit are equal.

3. The COB display screen display unit of claim 1, wherein the display unit is composed of bonding pads and red (R), green (G) and blue (B) LED chips soldered to the bonding pads

4. The COB panel display unit of claim 2 wherein the red (R), green (G) and blue (B) LED chips of each display unit are ordered in a R/G/B manner.

5. A COB display screen display unit as claimed in claim 3, wherein the distance between said red (R) LED chip and said green (G) LED chip is the same as the distance between said blue (B) LED chip and said green (G) LED chip, both being 0.163mm.

6. A COB display screen display unit as claimed in claim 3, wherein the distance between bonding pads at the edges of adjacent display units is 0.253mm, i.e. the distance between the blue (B) LED chip in the previous display unit and the red (R) LED chip in the next display unit is 0.253mm.