Wavelength conversion member and light-emitting device using same
A technology for wavelength conversion and light-emitting devices, applied in the directions of laser parts, lasers, filters, etc., can solve the problems of easy reduction, deterioration, discoloration or deformation of light-emitting devices, and achieve the effect of suppressing the decrease of luminous intensity
Pending Publication Date: 2020-07-24
NIPPON ELECTRIC GLASS CO LTD
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, when using this wavelength conversion member, there is a problem that the resin is deteriorated by the light from the excitation light source, and the brightness of the light-emitting device tends to decrease.
In particular, there is a problem that the molded resin is degraded, discolored or deformed by heat from the excitation light source or high-energy short-wavelength (blue to ultraviolet) light.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0077] Hereinafter, the wavelength conversion member of the present invention will be described in detail using examples, but the present invention is not limited to the following examples.
[0078] Table 1 shows Examples (No. 1-10) and Comparative Examples (No. 11-12) of the present invention.
[0079] [Table 1]
[0080]
[0081] The thermally conductive particles, the inorganic binder, and the phosphor particles were mixed at the ratios listed in Table 1 to obtain mixed powder. In the table, the content of the phosphor particles is the content in the mixed powder, and the thermally conductive particles and the inorganic binder account for the rest. As each material, the following were used.
[0082] (a) Thermally conductive particles
[0083] MgO (thermal conductivity: about 42W / m·K, average particle size D 50 : 8μm, Refractive index (nd): 1.73)
[0084] Al 2 o 3 (Thermal conductivity: about 20W / m·K, average particle size D 50 : 9μm, Refractive index (nd): 1.76) ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| Particle size | aaaaa | aaaaa |
| Softening point | aaaaa | aaaaa |
| Thickness | aaaaa | aaaaa |
Login to View More
Abstract
Provided are a wavelength conversion member whereby a reduction in light emission intensity over time or melting of a constituent material can be suppressed in the case of irradiation by high-power excitation light, a method for manufacturing the wavelength conversion member, and a light-emitting device in which the wavelength conversion member is used. A wavelength conversion member 10 in which phosphor particles 2 and heat-conductive particles 3 are dispersed in an inorganic binder 1, the wavelength conversion member 10 being characterized in that the refractive index difference of the inorganic binder 1 and the heat-conductive particles 3 is 0.2 or less, and the volume ratio of the content of each of the inorganic binder 1 and the heat-conductive particles 3 is 80:20 to more than 40:less than 60.
Description
technical field [0001] The present invention relates to a wavelength conversion member for converting the wavelength of light emitted by a light emitting diode (LED: Light Emitting Diode) or a laser diode (LD: Laser Diode) to another wavelength, and a light emitting device using the wavelength conversion member. Background technique [0002] In recent years, as next-generation light-emitting devices replacing fluorescent lamps and incandescent lamps, attention has been paid to light-emitting devices using excitation light sources such as LEDs and LDs from the viewpoints of low power consumption, small size and light weight, and easy adjustment of light intensity. As an example of such a next-generation light-emitting device, for example, Patent Document 1 discloses a light-emitting device in which an LED that emits blue light is provided with a wavelength conversion member that absorbs part of light from the LED and converts it into yellow light. This light emitting device e...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G02B5/20H01L33/50H01S5/022
CPCH01L33/501H01L33/642H01L33/641H01L33/504
Inventor 古山忠仁
Owner NIPPON ELECTRIC GLASS CO LTD