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Light-emitting diode with several regions of luminescent material

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.

Inactive Publication Date: 2018-01-02
OSRAM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 with several regions of luminescent material
  • Light-emitting diode with several regions of luminescent material
  • Light-emitting diode with several regions of luminescent material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] figure 1 A light-emitting diode 11 is shown in side view with an LED chip 12 having a backside support surface 13 and a front side 14 with an emission surface 15 emitting primary light forwards and upwards (top LED) . That is, the LED chip 12 emits in the first half. The primary light can be, for example, blue light.

[0032] On the front side 14 is placed a phosphor foil 16 which covers the emitting area 15 over the entire area. as in figure 2 It can also be seen in the top view of the phosphor plate 16 that it has two phosphor regions, a circular first phosphor region 17 made of ceramic phosphor and a synthetic matrix material, in particular silicon, filled with phosphor powder. The second luminescent material region 18 is made of resin. The two phosphor regions 17 and 18 have at least substantially the same height. The first (harder) phosphor region 17 is arranged centrally with respect to the longitudinal axis L of the light-emitting diode 11 , while the seco...

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PUM

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Abstract

A light emitting diode (11) having an LED chip (12) with at least one emitting surface (15) for emitting primary light and a plurality of luminescent material regions (17, 18) which are optically connected to at least Downstream of an emission surface (15), at least one harder phosphor region (17) of the phosphor regions is embedded in another softer phosphor region (18) of the phosphor regions. In particular, the invention can relate to conversion light-emitting diodes, in particular 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 emission surface for emitting primary light and having a plurality of phosphor regions which are optically connected downstream of the at least one emission surface. In particular, the invention can relate to conversion light-emitting diodes, in particular surface-emitting light-emitting diodes, such as vertically illuminated so-called top LEDs (Top-LEDs). Background technique [0002] Warm white light is typically produced by the fact that the primary light emitted by the LED chip is at least partially converted or converted into light of other wavelengths by means of at least one luminescent material, and that the different fractions of differently colored light thus produced have an overall color of warm white area. For example, blue primary light can be converted at least partially into red light by means of “red” pigments and at least partially into green light b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/50
CPCH01L33/504H01L33/505H01L33/508H01L33/502
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