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Device for producing a bundled light flux

A technology for a display and an optical device, applied in the field of head-up displays, can solve the problems of beam forming characteristics and scattering characteristics that cannot be used with head-up displays, and achieve the effects of improving light distribution, uniform optical density distribution, and high optical density

Inactive Publication Date: 2008-10-15
OSRAM OPTO SEMICON GMBH & CO OHG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these shown devices are hardly usable for head-up displays due to their individual beamforming and scattering properties

Method used

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  • Device for producing a bundled light flux
  • Device for producing a bundled light flux
  • Device for producing a bundled light flux

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] in accordance with figure 1 and 2 In the exemplary embodiment of the present invention, as light source, a grating of 4×8 groups is provided, each group having four light-emitting diodes 1 , which are mounted on a substrate 2 . The bridges 3 are located between the groups, with their inclined surfaces acting as reflectors.

[0021] A lenticular screen 4 is located on the light source, on which a grid-shaped reflector 5 is attached.

[0022] The webs 3 , the lenticular screen 4 and the obliquely extending surface 6 of the grid-shaped reflector 5 serve to distribute the light evenly. In order to avoid shading by the webs 7 of the reflector 5 , a frame 8 is provided which acts as a distance between the reflector 5 and the liquid crystal display 9 . A diffuser 10 is located under the liquid crystal display 9 for further improving the uniformity of the background illumination of the liquid crystal display 9 .

[0023] Said frame 8 influences the tilted position of the li...

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PUM

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Abstract

The invention relates to a device for producing a bundled light flux. According to the invention, a light source consisting of a light emitting diode matrix is provided, an optical device for bundling and scattering the light produced by the light-emitting diodes is arranged between the light source and a light outlet. The device for bundling and scattering comprises a latticed reflector which respectively forms a light channel for each matrix point, the walls of said light channel being reflective, and the end of each light channel, facing the light source contains a convergent lens.

Description

technical field [0001] The invention relates to a head-up display with a device for generating a beam of light, a light source and a graphic reproduction device with light valves. Background technique [0002] In order to convey information to the driver of the motor vehicle without diverting the driver's field of vision from the road on which the driver is traveling or the space in which the vehicle is flying, so-called head-up displays are known, by which an informational graphic is centered on the front window of a motor vehicle. In order to be able to see the graphics even in bright ambient light, a high brightness of the graphics is required for this. Bundled light streams are also required for other lighting purposes, for example as reading lights or as lighting for shop windows and exhibitions. [0003] The use of devices for generating beamed light streams in a display is known from US patents 5,836,676 and 5,043,716 and Japanese laid-open document 7-130256, respect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L25/075H01L33/60
CPCG02F1/133605H01L2224/48472H01L25/0753H01L2224/48091G02F1/133603H01L33/60H01L2924/00
Inventor G·博纳H·布赖尼希B·卢德维希R·迈尔H·诺尔J·E·索格
Owner OSRAM OPTO SEMICON GMBH & CO OHG
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