Wavelength conversion film
A technology of wavelength conversion and photoluminescent materials, which is applied in the field of wavelength conversion film, can solve the problems of wavelength conversion film and light-emitting device quality deterioration, and achieve the effect of reducing content and avoiding deterioration
Inactive Publication Date: 2020-02-14
CHUNGHWA PICTURE TUBES LTD
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Problems solved by technology
However, the ultraviolet light emitted by the light-emitting device will cause a plurality of titanium dioxide particles to produce a photocatalyst effect, causing the polymer material in the wavelength conversion film and the light-emitting device to degrade due to the photocatalyst effect, resulting in the problem of quality degradation of the wavelength conversion film and the light-emitting device.
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[0024] Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used in the drawings and description to refer to the same or like parts.
[0025] Figure 1A It is a schematic cross-sectional view of a wavelength conversion film according to an embodiment of the present invention.
[0026] Please refer to Figure 1A , the wavelength conversion film 10A of this embodiment includes a phosphor layer 100 and a light scattering layer 200 . In one embodiment, the wavelength conversion film 10A may be disposed at a remote location of a light emitting device (not shown) to form a light emitting package structure with the light emitting device. In other words, the wavelength conversion film 10A may be separated from the light emitting device by a specific distance, but the present invention is not limited thereto. The light emitting d...
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Abstract
The invention provides a wavelength conversion film, which comprises a phosphor layer and a light scattering layer, wherein the phosphor layer includes a first phosphor and a first matrix; and the light scattering layer includes a plurality of titanium dioxide particles and a second matrix. The wavelength conversion film further includes a photoluminescent material and a plurality of nanoparticles, wherein the photoluminescent material and the plurality of nanoparticles are located in at least one of the phosphor layer and the light scattering layer or respectively located in the phosphor layer and the light scattering layer. The wavelength conversion film provided by the invention can avoid the generation of a photocatalyst effect and improve the light conversion efficiency.
Description
technical field [0001] The present invention relates to a wavelength conversion film. Background technique [0002] Generally, existing wavelength conversion films include phosphors and a plurality of titanium dioxide particles. Phosphors absorb a portion of the blue light emitted by a light emitting device (eg, a light emitting diode) and convert it into visible light. A plurality of titanium dioxide particles can scatter part of the blue light emitted by the light-emitting device, so that the blue light is guided to the phosphor to be converted into visible light, and the wavelength conversion film is made visible in the light-emitting device by a plurality of titanium dioxide particles whose color is white. It also has a white appearance when closed. However, the ultraviolet light emitted by the light-emitting device will cause a plurality of titanium dioxide particles to produce a photocatalyst effect, causing the polymer material in the wavelength conversion film and ...
Claims
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IPC IPC(8): H01L33/50H01L33/58B82Y30/00
CPCB82Y30/00H01L33/502H01L33/505H01L33/58C09K11/08F21K9/64F21V9/38F21V13/02
Inventor 谢文俊叶朝文
Owner CHUNGHWA PICTURE TUBES LTD