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Light-emitting diode comprising a plurality of luminescent regions

A technology of light-emitting diodes and light-emitting materials, which is applied in the direction of semiconductor devices, electrical components, circuits, etc., and can solve the problems of waste materials, poor stability of ceramic thin plates, etc.

Active Publication Date: 2015-09-30
OSRAM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However this results in a poor stability of the ceramic sheet and moreover a lot of material is wasted in production

Method used

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  • Light-emitting diode comprising a plurality of luminescent regions
  • Light-emitting diode comprising a plurality of luminescent regions
  • Light-emitting diode comprising a plurality of luminescent regions

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Experimental program
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Embodiment Construction

[0032] figure 1 A side sectional view shows a light-emitting diode 11 with an LED chip 12 having a backside support surface 13 and a front side 14 with an emission surface 15 (top surface LED) emitting primary light forward and upward . That is, the LED chip 12 emits in the first half area. The primary light may be blue light, for example.

[0033] A luminescent material sheet 16 is placed on the front side 14, which luminescent material sheet covers the emitting surface 15 completely. As in figure 2 It can also be seen from the top view that the luminescent material sheet 16 has two luminescent material regions, namely a circular first luminescent material region 17 made of ceramic luminescent material and a synthetic material matrix material filled with luminescent material powder, especially silicon The second luminescent material region 18 made of resin. The two luminescent material regions 17 and 18 have at least substantially the same height. The first (harder) lumines...

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PUM

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Abstract

A light-emitting diode (11) has an LED chip (12), which has at least one emitter surface (15) for emitting primary light, and a plurality of luminescent regions (17, 18), which are optically arranged downstream of the at least one emitter surface (15), at least one harder region of the luminescent regions (17) being embedded into another softer region of the luminescent regions (18). The invention can also be used in conversion light-emitting diodes, in particular in surface-emitting light-emitting diodes.

Description

Technical field [0001] The invention relates to a light emitting diode having an LED chip with at least one emitting surface for emitting primary light and having a plurality of luminescent material regions, which are optically connected downstream of the at least one emitting surface. The present invention can particularly relate to conversion type light-emitting diodes, especially surface-emitting light-emitting diodes, such as vertically illuminated so-called Top-LEDs. Background technique [0002] Warm white light is typically generated by the fact that the primary light emitted by the LED chip is at least partially converted or changed into light of other wavelengths by means of at least one luminescent material, and the different portions of the light of different colors thus generated have a warm white overall color area. For example, blue primary light can be at least partially converted into red light by a "red" pigment and at least partially converted into green light ...

Claims

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Application Information

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IPC IPC(8): H01L33/50
CPCH01L33/508H01L33/504H01L33/505H01L33/502
Inventor 安德烈亚斯·比贝尔斯多夫弗洛里安·伯斯尔克里斯特·贝格内克拉尔夫·维尔特
Owner OSRAM GMBH