Composition, substrate and preparation method of light reflection layer

Patent metadata

Field	Value
Publication number	US-12163019-B2
Application number	US-202117479174-A
Country	US
Kind code	B2
Filing date	Sep 20, 2021
Priority date	Feb 25, 2021
Publication date	Dec 10, 2024
Grant date	Dec 10, 2024

Abstract

The present disclosure relates to a composition, a substrate and a preparation method of a light reflection layer. The composition comprises: a matrix material and an additive, the matrix material including a solvent, reactant molecules and a material with reflection function dispersed in the solvent, wherein the reactant molecules is capable of undergoing cross-linking reaction under a first preset condition, and include monomer molecules and/or prepolymer molecules; the additive including a filler material that is in the form of powder or microspheres, capable of being dispersed in the matrix material, and filled between the crosslinking points of any adjacent reactant molecules to block the crosslinking reaction of some adjacent reactant molecules under the first preset condition.

First claim

What is claimed is:

1. A composition, comprising:
a matrix material including a solvent, reactant molecules and a material with reflection function dispersed in the solvent, wherein the reactant molecules is capable of undergoing cross-linking reaction under a first preset condition, and include monomer molecules and/or prepolymer molecules; and
an additive including a filler material that is in the form of powder or microspheres, capable of being dispersed in the matrix material, and filled between the crosslinking points of any adjacent reactant molecules to block the crosslinking reaction of some adjacent reactant molecules under the first preset condition; wherein:
the material with reflection function is in the form of powder or microspheres;
a particle diameter of the filler material is smaller than a particle diameter of the material with reflection function, wherein the particle diameter of the filler material is 0.5 μm˜2 μm;
the filler material is selected from a mixture of one or more materials selected from a group consisting of silicon dioxide, silicate, metal oxide, titanium dioxide, calcium carbonate, and cellulose, and a mass ratio of the filler material in the composition is 0.1%˜5%.

2. The composition according to claim 1 , wherein the reactant molecule is selected from at least one of acrylic resin or epoxy resin.

3. The composition according to claim 2 , wherein the reactant molecule is selected from epoxy resin.

4. The composition according to claim 1 , wherein the particle diameter of the material with reflection function is 4 μm˜8 μm.

5. The composition according to claim 1 , wherein given a determined mass percentage of the additive in the composition, the ratio of the mass of the filler material to the mass of additive components in the additive other than the filler material is greater than or equal to 1:1 and less than or equal to 4:1.

6. The composition according to claim 1 , wherein the mass ratio of the additive in the composition is 1%˜10%.

7. A method for preparing a light reflection layer, comprising:
uniformly mixing the matrix material and the filler material in the composition according to claim 1 to obtain a mixed solution;
forming a prefabricated film by forming the mixed liquid on a base substrate;
under the first preset condition, forming a light reflection film by crosslinking reaction occurred between adjacent reactant molecules in the prefabricated film that are not blocked by the filler material;
curing the light reflection film to form a light reflection layer; wherein:
the material with reflection function is in the form of powder or microspheres;
a particle diameter of the filler material is smaller than a particle diameter of the material with reflection function, wherein the particle diameter of the filler material is 0.5 μm˜2 μm;
the filler material is selected from a mixture of one or more materials selected from a group consisting of silicon dioxide, silicate, metal oxide, titanium dioxide, calcium carbonate, and cellulose, and a mass ratio of the filler material in the composition is 0.1%˜5%.

8. The method for preparing a light reflection layer according to claim 7 , wherein uniformly mixing the matrix material and the filler material in the composition comprises:
stirring the matrix material and the filler material for a preset time under a second preset condition to mix the matrix material and the filler material uniformly, wherein the second preset condition is different from the first preset condition.

9. A substrate, wherein the substrate is prepared by the method for preparing a light reflection layer according to claim 7 .

10. The substrate according to claim 9 , wherein the substrate further comprises a plurality of light-emitting elements arranged at intervals on the base substrate of the substrate;
the light reflection layer is formed between any two adjacent light-emitting elements of the plurality of light-emitting elements.

11. The substrate according to claim 9 , wherein
each light-emitting element of the plurality of light-emitting elements includes a light-emitting surface;
the substrate further comprises a light conversion layer arranged over the base substrate and located on one side of the light-emitting surface;
the light conversion layer is configured to receive light emitted from the light-emitting surface and emit the light after performing wavelength conversion on the light emitted from the light-emitting surface, and the light-reflecting layer is configured to reflect the light emitted by the light conversion layer.

12. The substrate according to claim 10 , wherein
each light-emitting element of the plurality of light-emitting elements includes a light-emitting surface;
the substrate further comprises a light conversion layer arranged over the base substrate and located on one side of the light-emitting surface;
the light conversion layer is configured to receive light emitted from the light-emitting surface and emit light after performing wavelength conversion on the light emitted from the light-emitting surface, and the light-reflecting layer is configured to reflect the light emitted by the light conversion layer.

Assignees

• Hefei Boe Optoelectronics Tech
• Boe Technology Group Co Ltd

Inventors

• Zhang Bing
• Zhang Teng
• Geng Xiaolin
• Gao Liang

Classifications

• H10K59/878

  comprising reflective means · CPC title

• H10H20/882

  Scattering means (H10H20/82 takes precedence) · CPC title

• H10H20/856

  Reflecting means · CPC title

• H10H20/855

  Optical field-shaping means, e.g. lenses · CPC title

• H10H20/8515

  not being in contact with the bodies · CPC title