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CN-224216955-U - Backlight module, head-up display and motor vehicle

CN224216955UCN 224216955 UCN224216955 UCN 224216955UCN-224216955-U

Abstract

The disclosure provides a backlight module, a head-up display and a motor vehicle, which have compact structures and can realize good heat dissipation. The backlight module (100) includes a substrate (110) having a first side and a second side opposite to the first side, a plurality of light emitting elements (120) mounted on the first side of the substrate and each having a light emitting surface (121) that emits light toward the first side of the substrate, a mount portion (140) provided on the first side of the substrate and having a plurality of tube portions (142) that house each of the plurality of light emitting elements, and a light color conversion layer (150) including a phosphor and disposed at least in each of the plurality of tube portions so as to cover the light emitting surface in contact with the light emitting surface, each of the plurality of tube portions being open on the light emitting surface side, an opening edge of each of the tube portions being flush with or higher than the light emitting surface, the light color conversion layer covering the light emitting surface and an opening of each of the tube portions.

Inventors

  • NI WEI
  • Ayub Ben Nahen

Assignees

  • 法雷奥舒适驾驶辅助系统(广州)有限公司

Dates

Publication Date
20260508
Application Date
20260403

Claims (11)

  1. 1. A backlight module (100), comprising: A substrate (110) comprising a first side and a second side opposite to the first side; A plurality of light emitting elements (120) mounted on a first side of the substrate and each having a light emitting surface (121) that emits light toward the first side of the substrate; The backlight module further comprises: A holder portion (140) provided on a first side of the substrate and having a plurality of tube portions (142) for accommodating each of the plurality of light emitting elements, and A light color conversion layer (150) that includes a phosphor and is disposed at least in each of the plurality of tube portions so as to cover the light emitting surface; the light color conversion layer (150) is arranged in contact with the light emitting surface; Each of the plurality of tube sections (142) is open on the light emitting surface side, an opening edge of each tube section is flush with or higher than the light emitting surface, and the light color conversion layer (150) covers the light emitting surface and an opening formed by the opening edge.
  2. 2. A backlight module according to claim 1, wherein, The holder portion (140) further has a plurality of transparent portions (144) that respectively block the openings and cover the light emitting surface, and the light color conversion layer (150) is located on the transparent portions (144).
  3. 3. A backlight module according to claim 1, wherein, The bracket (140) further includes a plurality of holes provided around each of the plurality of cylinders (142) and penetrating the bracket to partially expose the substrate.
  4. 4. A backlight module according to claim 3, wherein, The light color conversion layer (150) sequentially covers the barrel portion (142) and the aperture portion in a continuous manner and is in contact with the first side of the substrate (110).
  5. 5. A backlight module according to claim 4, wherein, The light color conversion layer (150) is a strip-shaped film.
  6. 6. A backlight module according to claim 4, wherein, The light color conversion layer (150) is a coating layer.
  7. 7. A backlight module according to claim 3, wherein, The backlight module (100) further comprises a packaging part (160), The encapsulation portion covers the light color conversion layer (150) and is in contact with the substrate (110) via the hole portion.
  8. 8. A backlight module according to claim 3, wherein, The plurality of hole portions includes at least an arc-shaped hole (143 a) having an arc-shaped outer peripheral edge, a concave portion of the arc-shaped outer peripheral edge being directed toward the adjacent barrel portion (142).
  9. 9. A head-up display, characterized by comprising a backlight module (100) according to any of claims 1 to 8 as a light source.
  10. 10. The head-up display of claim 9, wherein the display is configured to display the plurality of images, The heads-up display is a panoramic head-up display (400).
  11. 11. A motor vehicle comprising a backlight module according to any one of claims 1 to 8, or a heads-up display according to claim 9 or 10.

Description

Backlight module, head-up display and motor vehicle Technical Field The present disclosure relates to a backlight module, a head up display, and a motor vehicle. Background As an important vehicle-mounted driving assistance device, a Head-up Display (HUD) projects key driving information onto a windshield in front of a driver, so that the driver can acquire the information without lowering the Head, thereby improving driving safety. In recent years, a panoramic head-up display (Panoramic HUD, PHUD) has begun to be attracting attention. Compared with the ordinary HUD, PHUD has a wider display area and richer information content as shown in fig. 8, and the requirement for display brightness is extremely high because the range of the projection information is larger and the requirement for not submerging the projection light by the ambient light is stronger. As a backlight module of PHUD, a Chip On Board (COB) in which a blue LED bare Chip is directly mounted on a substrate may be used, and a Quantum Dot (QD) film scheme may be disposed on an optical path. In this scheme, blue Light emitted by an LED (Light-emitting Diode) chip has high energy, and a large amount of heat is generated in the process of performing Light color conversion on the quantum dot film, and the quantum dot film lacks an effective heat dissipation structure. Therefore, when the scheme is applied to PHUD, since the backlight module works at high power, a great amount of heat is accumulated on the quantum dot film, the temperature of the quantum dot film is increased, the light color conversion efficiency is reduced, the color cast is generated, and the ablation risk exists. Therefore, the heat dissipation capability of the light color conversion layer becomes a bottleneck for restricting PHUD to achieve high brightness. The present disclosure provides a new backlight module to solve the above-mentioned problems. Disclosure of utility model The invention aims to provide a backlight module, a head-up display and a motor vehicle, which have compact structures and can realize good heat dissipation. In one embodiment of the present disclosure, there is provided a backlight module including: A substrate comprising a first side and a second side opposite the first side; a plurality of light emitting elements mounted on the first side of the substrate and each having a light emitting surface that emits light toward the first side of the substrate; The backlight module further comprises: A holder portion provided on a first side of the substrate and having a plurality of tube portions accommodating the respective light emitting elements of the plurality of light emitting elements, and And a light color conversion layer including a phosphor and disposed at least in each of the plurality of tube portions so as to cover the light emitting surface. The backlight module according to the present disclosure may also have one or more of the following features, alone or in combination. In the above backlight module, the light color conversion layer is disposed in contact with the light emitting surface. In the backlight module, each of the plurality of barrel portions is open on the light emitting surface side, an opening edge of each barrel portion is flush with or higher than the light emitting surface, and the light color conversion layer covers the light emitting surface and an opening formed by the opening edge. In the above backlight module, the bracket further has a plurality of transparent portions that respectively block the openings and cover the light emitting surface, and the light color conversion layer is disposed on the transparent portions. In the backlight module, the support part further comprises a plurality of hole parts which are arranged around each of the plurality of cylinder parts and penetrate through the support part to partially expose the substrate. In the above backlight module, the light color conversion layer sequentially covers the cylindrical portion and the hole portion in a continuous manner and contacts the first side of the substrate. In the backlight module, the light color conversion layer is a strip-shaped film. In the above backlight module, the light color conversion layer is a coating layer. In the above backlight module, the backlight module further includes a packaging portion covering the light color conversion layer and contacting the substrate via the hole portion. In the above backlight module, the plurality of hole portions at least include an arc-shaped hole, the arc-shaped hole has an arc-shaped outer periphery, and a concave portion of the arc-shaped outer periphery points to the adjacent barrel portion. In another embodiment of the present disclosure, a head-up display is provided, where the head-up display includes the backlight module as a light source. In the above head up display, the head up display is a panoramic head up display. In yet another embodiment of the present disclosure, a motor vehicle