Wavelength conversion device and method for manufacturing the same
AssigneeAppotronics Corporation Limited
InventorsQian Li, Yanzheng Xu
Life of this patent
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Abstract
A wavelength conversion device, comprising a light-emitting layer, a reflection layer, and a substrate layer stacked upon each other in that order. The light-emitting layer comprises a wavelength conversion material and a first glass powder. The reflection layer comprises a reflection particle and a second glass powder. The second glass powder has a smaller particle diameter compared to the first glass powder. The technical solution achieves equivalent softening of the reflection layer and light-emitting layer in a sintering process for manufacturing the wavelength conversion device, thereby overcoming the issue of inadequate softening of the reflection layer and improving an adhesive strength between the reflection layer and the substrate layer.
Claims20
A wavelength conversion device, comprising:
- the wavelength conversion device comprises:
- a light-emitting layer, a reflection layer and a substrate layer stacked on each other in that order, wherein the light-emitting layer comprises a wavelength conversion material and a first glass powder, the reflection layer comprises reflection particles and a second glass powder, and the second glass powder has an average particle size smaller than an average particle size of the first glass powder in such a manner that softening temperatures of the light-emitting layer and the reflection layer are close to each other, wherein the light-emitting layer is bonded to the reflection layer and the substrate by co-sintering the light-emitting layer and the reflection layer on the substrate.
A method for manufacturing a wavelength conversion device, comprising the following steps:
- S1:
- uniformly mixing a wavelength conversion material, a first glass powder and an organic vehicle to obtain a light-emitting layer slurry;
- S2:
- uniformly mixing reflection particles, a second glass powder and an organic vehicle to obtain a reflection layer slurry, wherein the second glass powder has a particle size smaller than a particle size of the first glass powder in such a manner that softening temperatures of the light-emitting layer and the reflection layer are close to each other;
- and
- S3:
- brushing and drying the reflection layer slurry on a substrate layer, brushing and drying the light-emitting layer slurry on the dried reflection layer slurry, and sintering the substrate layer covered by the dried reflection layer slurry and the dried light-emitting layer slurry, so as to obtain the wavelength conversion device.
Dependencies are inferred from the claim text.