Optical module and tiled display device

Patent metadata

Field	Value
Publication number	US-12560840-B2
Application number	US-202318843321-A
Country	US
Kind code	B2
Filing date	Mar 3, 2023
Priority date	Apr 24, 2022
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

An optical module and a tiled display device. The optical module comprises: a diffusion plate ( 10 b ); a color conversion layer ( 20 b ) provided on one side of the diffusion plate ( 10 b ); and a wavelength selective transmission layer ( 30 ) provided between the diffusion plate ( 10 b ) and the color conversion layer ( 20 b ), wherein the wavelength selective transmission layer ( 30 ) is configured to transmit light of a specific color and prevent the transmission of light of colors other than the light of the specific color.

First claim

The invention claimed is:

1 . An optical module, comprising:
a diffusion plate; a color conversion layer stacked on a side of the diffusion plate; a wavelength-selective transmission layer stacked between the diffusion plate and the color conversion layer, wherein the wavelength-selective transmission layer is configured to transmit light of a specific color and prevent transmission of light of other colors except the light of the specific color; wherein a side surface of the diffusion plate, a side surface of the wavelength-selective transmission layer, and a side surface of the color conversion layer are flush; and a frame sealing glue layer, wherein the frame sealing glue layer covers the side surface of the diffusion plate, the side surface of the wavelength-selective transmission layer, and the side surface of the color conversion layer; the frame sealing glue layer is configured to prevent blue light overflow at a display edge due to an edge failure of the color conversion layer; a cross-sectional shape of the frame sealing glue layer is arc-shaped, a maximum thickness of the frame sealing glue layer covering the color conversion layer is less than a maximum thickness of the frame sealing glue layer covering the wavelength-selective transmission layer, and the maximum thickness of the frame sealing glue layer covering the wavelength-selective transmission layer is less than a maximum thickness of the frame sealing glue layer covering the diffusion plate; wherein the wavelength-selective transmission layer is a color filter layer, and a material of the wavelength-selective transmission layer comprises a dispersant and a blue pigment.

2 . The optical module according to claim 1 , wherein the wavelength-selective transmission layer is configured to transmit blue light and block transmission of red light and green light.

3 . The optical module according to claim 2 , wherein the wavelength-selective transmission layer is configured to transmit the blue light and absorb the red light and the green light.

4 . The optical module according to claim 1 , wherein the wavelength-selective transmission layer is configured to transmit light of a specific color and absorb light of other colors except the light of the specific color.

5 . The optical module according to claim 4 , further comprising an adhesive layer, wherein the adhesive layer is provided between the wavelength-selective transmission layer and the color conversion layer.

6 . The optical module according to claim 1 , further comprising a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is provided between the wavelength-selective transmission layer and the diffusion plate, and the second adhesive layer is provided between the wavelength-selective transmission layer and the color conversion layer.

7 . The optical module according to claim 1 , wherein the diffusion plate comprises a transparent substrate and a diffusion layer provided on a side of the transparent substrate away from the color conversion layer, and the diffusion layer is made of an ink material.

8 . The optical module according to claim 7 , wherein the transparent substrate is made of a glass material.

9 . The optical module according to claim 7 , wherein the transparent substrate has a thickness of 0.7 mm to 1.1 mm.

10 . The optical module according to claim 1 , wherein the frame sealing glue layer is made of photosensitive glue.

11 . A display device, comprising a display unit, wherein the display unit comprises a backlight module and a display panel provided opposite to each other, and the optical module according to claim 1 provided between the backlight module and the display panel.

12 . The display device according to claim 11 , wherein the backlight module comprises:
a back plate; a middle bezel, wherein the middle bezel is connected with the back plate and forms a support structure together with the back plate, the support structure is provided with an optical cavity, and the optical module is provided on the support structure; and a light emitting substrate, wherein the light emitting substrate is located in the optical cavity and is provided opposite to the optical module.

13 . The display device according to claim 12 , wherein the middle bezel is made of a metal extrusion profile.

Assignees

• Beijing Boe Display Tech Co
• Boe Technology Group Co Ltd

Inventors

• Zhong Wei
• Shi Haijun
• Fu Changjia
• Qu qingshan
• Wan Haiyan

Classifications

• G02F1/133608

  including particular frames or supporting means · CPC title

• G02F1/133606 Primary

  including a specially adapted diffusing, scattering or light controlling members · CPC title

• G02F1/133614

  using photoluminescence, e.g. phosphors illuminated by UV or blue light · CPC title

• G02F1/133624 Primary

  characterised by their spectral emissions · CPC title

• G02F1/133611 Primary

  including means for improving the brightness uniformity · CPC title