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CN-224234103-U - Light emitting chip assembly, LED display module and LED display device

CN224234103UCN 224234103 UCN224234103 UCN 224234103UCN-224234103-U

Abstract

The utility model provides a light emitting chip assembly, an LED display module and an LED display device, wherein the light emitting chip assembly comprises a mounting substrate, a red light emitting chip, a blue light emitting chip and a green light emitting chip, the red light emitting chip is arranged on the front side of the mounting substrate, the red light emitting chip is provided with a red light front surface, the blue light emitting chip is arranged on the front side of the red light emitting chip, and the green light emitting chip is arranged on the front side of the red light emitting chip, wherein the blue light emitting chip and the green light emitting chip can shield part of the red light front surface. The technical scheme of the utility model can effectively solve the problem of color deviation display under different angles in the related technology.

Inventors

  • WANG XIAOTIAN
  • FAN YAOBIN
  • Su yuanxing
  • ZHANG ZHIWEI
  • ZHU XIAOLONG

Assignees

  • 利晶微电子技术(江苏)有限公司

Dates

Publication Date
20260512
Application Date
20250407

Claims (10)

  1. 1. A light emitting chip assembly, comprising: A mounting board (10); A red light emitting chip (20) disposed on a front side of the mounting substrate (10), the red light emitting chip (20) having a red light front surface (21); a blue light emitting chip (30) disposed on a front side of the red light emitting chip (20); A green light emitting chip (40) disposed on a front side of the red light emitting chip (20); wherein the blue light emitting chip (30) and the green light emitting chip (40) are capable of shielding a portion of the red light front surface (21).
  2. 2. The light emitting chip assembly according to claim 1, characterized in that the projection of the blue light emitting chip (30) and the green light emitting chip (40) on the red light front surface (21) and the edge of the red light front surface (21) each have a distance.
  3. 3. The light emitting chip assembly according to claim 2, wherein the blue light emitting chip (30) and the green light emitting chip (40) are arranged at intervals in a direction parallel to the red light front surface (21).
  4. 4. The light emitting chip assembly according to claim 2, wherein a separation distance between a projection of the blue light emitting chip (30) on the red light front surface (21) and an edge of the red light front surface (21) is 50 μm or more and 100 μm or less.
  5. 5. The light emitting chip assembly of claim 2 wherein, The ratio of the sum of projection areas of the blue light emitting chip (30) and the green light emitting chip (40) on the red light front surface (21) to the surface area of the red light front surface (21) is 1:3 or more and 2:3 or less, and/or, The thickness of the red light emitting chip (20) is 100 [ mu ] m or more and 200 [ mu ] m or less, and the thicknesses of the blue light emitting chip (30) and the green light emitting chip (40) are 75 [ mu ] m or more and 150 [ mu ] m or less.
  6. 6. The light emitting chip assembly according to any one of claims 1 to 5, wherein the blue light emitting chip (30) has a chip body (31) and an electrode (32), the chip body (31) having a connection face arranged facing away from the blue light front surface (311), the connection face being connected to the red light front surface (21), the electrode (32) being located on the blue light front surface (311).
  7. 7. The light emitting chip assembly according to claim 6, further comprising a first conductive portion (51), a second conductive portion (52), a third conductive portion (53) and a fourth conductive portion (54) on the mounting substrate (10), wherein the third conductive portion (53) and the fourth conductive portion (54) are located outside the red light emitting chip (20), wherein the first conductive portion (51) is electrically connected to a first pole of the red light emitting chip (20), a first pole of the blue light emitting chip (30) and a first pole of the green light emitting chip (40), wherein the second conductive portion (52) is electrically connected to a second pole of the red light emitting chip (20), wherein the third conductive portion (53) is electrically connected to a second pole of the blue light emitting chip (30), and wherein the fourth conductive portion (54) is electrically connected to a second pole of the green light emitting chip (40).
  8. 8. The light emitting chip assembly according to claim 7, further comprising a bonding wire connected between the electrode (32) and the first conductive portion (51), and a protective colloid portion connected with the mounting substrate (10), the bonding wire, the red light emitting chip (20), the blue light emitting chip (30), and the green light emitting chip (40) being located within the protective colloid portion.
  9. 9. An LED display module comprising a plurality of light emitting chip assemblies, wherein the light emitting chip assemblies are as claimed in any one of claims 1 to 8.
  10. 10. An LED display device comprising an LED display module, wherein the LED display module is the LED display module of claim 9.

Description

Light emitting chip assembly, LED display module and LED display device Technical Field The utility model relates to the technical field of LED display, in particular to a light-emitting chip assembly, an LED display module and an LED display device. Background With the maturation of LED display technology and the expansion of application range, users put higher demands on the quality of LED products, especially the color display quality of LED display devices. Currently, in the related art, there is often a problem that color display is inconsistent when a large-screen direct display type LED display device is viewed at a positive viewing angle and a large angle (relative positive viewing angle >60 degrees), and the main reason is that the light emitting angle of the red light emitting chip is about 120 degrees, and the light emitting angles of the green light emitting chip and the blue light emitting chip are about 140 degrees. At different viewing angles, the light emission differences of the red light emitting chip, the green light emitting chip and the blue light emitting chip are large, thereby causing color deviation. In order to solve the problems, two methods are generally adopted in the field, namely, a blue light emitting chip is used for exciting red fluorescent powder to replace a red light emitting chip, a CSP structure is formed by adopting the method, the structure is large in size, large in half-wave width, low in color saturation and poor in display effect, and in addition, a blue light emitting chip can be used for exciting quantum dots, but the existing technology is relatively immature, the structure is greatly influenced by high temperature and high humidity, the reliability is poor, and the color stability is poor after long-time use. Disclosure of utility model The utility model mainly aims to provide a light-emitting chip assembly, an LED display module and an LED display device, so as to solve the problem of color deviation display under different angles in the related art. In order to achieve the above object, according to one aspect of the present utility model, there is provided a light emitting chip assembly including a mounting substrate, a red light emitting chip disposed at a front side of the mounting substrate, the red light emitting chip having a red light front surface, a blue light emitting chip disposed at a front side of the red light emitting chip, and a green light emitting chip disposed at a front side of the red light emitting chip, wherein the blue light emitting chip and the green light emitting chip are capable of blocking a portion of the red light front surface. Further, the projection of the blue light emitting chip and the green light emitting chip on the red light front surface has a distance from the edge of the red light front surface. Further, the blue light emitting chips and the green light emitting chips are arranged at intervals in a direction parallel to the front surface of the red light. Further, a separation distance between the projection of the blue light emitting chip on the red light front surface and an edge of the red light front surface is 50 μm or more and 100 μm or less. Further, the ratio of the sum of the projected areas of the blue light emitting chip and the green light emitting chip on the red light front surface to the surface area of the red light front surface is 1:3 or more and 2:3 or less, and/or the thickness of the red light emitting chip is 100 μm or more and 200 μm or less, and the thicknesses of the blue light emitting chip and the green light emitting chip are 75 μm or more and 150 μm or less. Further, the blue light emitting chip is provided with a chip body and an electrode, the chip body is provided with a connecting surface and a blue light front surface which are arranged in a deviating mode, the connecting surface is connected with the red light front surface, and the electrode is positioned on the blue light front surface. Further, the light emitting chip assembly further comprises a first conductive part, a second conductive part, a third conductive part and a fourth conductive part which are positioned on the mounting substrate, wherein the third conductive part and the fourth conductive part are positioned on the outer side of the red light emitting chip, the first conductive part is electrically connected with the first pole of the red light emitting chip, the first pole of the blue light emitting chip and the first pole of the green light emitting chip, the second conductive part is electrically connected with the second pole of the red light emitting chip, the third conductive part is electrically connected with the second pole of the blue light emitting chip, and the fourth conductive part is electrically connected with the second pole of the green light emitting chip. Further, the light emitting chip assembly further comprises a bonding wire and a protective colloid portion, the bonding wire is connected b