Light emitting apparatus and method for manufacturing thereof

一种发光装置、制造方法的技术，应用在发光材料、化学仪器和方法、用于材料和表面科学的纳米技术等方向，能够解决难以得到颜色再现性和明亮度、发光装置劣化加剧、发光效率降低等问题，达到提高颜色再现性、缓和光散射、提高明亮度的效果

Inactive Publication Date: 2012-03-14
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This phosphor layer blocks light from the light emitting element 91 or causes light scattering, making it difficult to extract light from the lowermost layer 93.
As a result, the balance of the luminous intensity of each color collapses, making it difficult to obtain ideal color reproducibility and brightness.
In addition, since the heat radiated from the light-emitting element is not sufficiently released from the light-emitting device, it may not be possible to convert electrical energy into light energy, and the reduction in luminous efficiency and the deterioration of the light-emitting device are exacerbated.

Method used

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  • Light emitting apparatus and method for manufacturing thereof
  • Light emitting apparatus and method for manufacturing thereof
  • Light emitting apparatus and method for manufacturing thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0037] figure 1 It is a sectional view of the light emitting device of this embodiment. The light-emitting device 10 is composed of a substrate 2 on which an electrode 1 is formed, a package 3 and a light-emitting element 4 provided on the electrode 1 , a wire 5 connecting the light-emitting element 4 and the electrode 1 , and a wavelength conversion unit. In this wavelength conversion part, a first wavelength conversion part 6 containing semiconductor nanoparticles and a second wavelength conversion part 7 containing Eu-activated β-type sialon phosphors are laminated in the order of the optical path of the light emitting element 4 .

[0038] The electrode 1 is electrically connected to the light emitting element 4 through a metal wire 5 . As the conductor constituting the electrode 1, it is necessary to use a material having a function of electrically connecting the electrical conduction path of the light-emitting element 4, specifically, a metallized layer containing metal...

Embodiment approach 2

[0057] Next, three types of light-emitting devices in which the content of the Eu-activated β-type sialon phosphor contained in the second wavelength converting portion was changed were produced by the same method as in the first embodiment. That is, the amount of the Eu-activated β-type sialon phosphor contained in the silicone resin (SCR1011) per 1 g of the second wavelength conversion part 7 was prepared to be (I) 0.03 g, (II) 0.1 g, (III) ) 0.3g of three light-emitting devices. In addition, as the silicone resin 8, SCR1011 is used in the same manner as in the embodiment, and it is laminated with figure 1 The shown second wavelength conversion parts have substantially the same thickness.

Embodiment approach 3

[0067] This embodiment is the same as the light-emitting device of Embodiment 1 except that the resin sheet 8 is included in the second wavelength converting portion 7 of Embodiment 1. FIG. Figure 8 It is a cross-sectional view of the light emitting device of the third embodiment. The resin sheet 8 dispersed and kneaded in the second wavelength conversion part 7 is not particularly limited as long as it is an optically transparent material, and silicone or epoxy-based materials are mainly used. The shape of the resin sheet 8 is generally a bead shape, but is not limited thereto. However, the size of the resin sheet 8 is preferably uniform. In this embodiment, the resin sheet whose refractive index is the same as or close to the resin layer which comprises the 2nd wavelength conversion part 7 is used. In addition, light scattering may be utilized by making the refractive index of the resin sheet different from that of the resin layer. In addition, although a resin sheet is ...

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PUM

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Abstract

A light emitting apparatus includes a light emitting device emitting primary light and a wavelength conversion unit absorbing a part of the primary light to emit secondary light. The wavelength conversion unit includes a first wavelength conversion unit containing at least a nanocrystalline phosphor and a second wavelength conversion unit containing a rare-earth-activated phosphor or a transition-metal-element-activated phosphor. In the light emitting device, the first wavelength conversion unit and the second wavelength conversion unit are closely stacked in order.

Description

technical field [0001] The present invention relates to a light-emitting device and its manufacturing method, and more particularly to a light-emitting device using a phosphor excited by light emitted from a light source and its manufacturing method. Background technique [0002] Light-emitting devices using light-emitting diodes (hereinafter referred to as LEDs) are attracting attention as next-generation light-emitting devices expected to have low power consumption, small size, and high luminance. As light-emitting devices using LEDs, there are LED backlights for liquid crystal displays and LED light bulbs. The light emitting part of the LED backlight or the LED light bulb emits light different from the light emitted by the LED itself. That is, the light-emitting unit of the light-emitting device using the LED mixes and emits light whose wavelength has been partially converted by the phosphor of the LED and light that has not been wavelength-converted by the phosphor of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/50
CPCB82Y30/00C09K11/0883C09K11/70C09K11/883H01L33/502H01L33/504H01L33/505H01L2224/48091H01L2224/48247H01L2924/1815C09K11/77348H01L2924/00014
Inventor 安念一规和泉真三枝贵三子吉村健一福永浩史
Owner SHARP KK
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