Unlock instant, AI-driven research and patent intelligence for your innovation.

Lighting device with semiconductor light source and spaced-apart phosphor region

A technology for lighting devices and luminescent materials, which is applied to lighting devices, components of lighting devices, optical elements for changing the spectral characteristics of emitted light, etc., and can solve problems such as unfavorable, luminescent materials that cannot be arranged in external bulbs, etc., to achieve cost reduction effect

Active Publication Date: 2014-07-23
OSRAM GMBH
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the luminescent material cannot be arranged on the outside of the outer bulb, because then the yellow perception would be too strong
However, a luminescent material located inside is thermally unfavorable because it cannot be cooled by the surrounding air

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Lighting device with semiconductor light source and spaced-apart phosphor region
  • Lighting device with semiconductor light source and spaced-apart phosphor region
  • Lighting device with semiconductor light source and spaced-apart phosphor region

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] figure 1 The lighting device 11 according to the first embodiment is shown in side view. The lighting device 11 is in the form of an incandescent retrofit lamp, which is designed to replace conventional incandescent lamps and has at least approximately its outer contour. For mechanical and electrical connection to a lamp socket (not shown), the lighting device has a lamp cap 12, such as an Edison lamp cap, on the rearward end. Adjoining the base 12 is a cooling body 13 which is also the housing of the driver cavity for receiving the driver. A carrier 14 for carrying a plurality of light-emitting diodes 15 , here semiconductor light sources emitting blue primary light, is arranged on the upper side of the cooling body 13 (indicated by dashed lines). The light-emitting diode 15 is completely covered by a dome-shaped phosphor region in the form of a phosphor layer 16 . The phosphor layer 16 is spaced apart from the light-emitting diode 15 and partially converts the blue...

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

No PUM Login to View More

Abstract

The present invention relates to a lighting device. The lighting device (11) comprises at least one semiconductor light source (15) which emits primary light, at least one phosphor region (16) spaced apart from the at least one semiconductor light source (15) and serving for at least partly converting the primary light into secondary light, and at least one filter (19, 19a, 19b) disposed downstream of the at least one phosphor region (16), wherein the at least one filter (19, 19a, 19b) is partly reflective at least to the primary light. The lighting device can be in particular a lamp, in particular a retrofit lamp.

Description

technical field [0001] The invention relates to a lighting device having at least one primary light-emitting semiconductor light source and at least one luminescent material region ("remote phosphor") spaced apart from the at least one semiconductor light source, which region serves to convert the primary light into at least partially converted into secondary light. The invention can preferably be used in retrofit lamps. Background technique [0002] In lighting devices of the related type, which are present as white-emitting LED lamps, the blue light emitted by the light-emitting diodes (LEDs) is at least partially converted into yellow light in the region of the phosphor. The addition of the two then gives rise to a blue-yellow or white mixed light from the phosphor regions. When viewed from the outside, the luminescent material region appears yellow when the LED light is switched off. However, this yellow appearance is to be avoided in many applications. [0003] Nume...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F21K99/00F21V9/00F21Y101/02F21V9/40
CPCF21V9/00F21V3/02F21K9/64F21Y2115/10F21V3/10F21K9/232
Inventor 亨里克·施特雷佩尔莫里茨·恩格尔迪尔克·贝尔本约尔格·弗里舍森米夏埃尔·舍威尔
Owner OSRAM GMBH