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Light guide assembly for display illumination

A technology of light guide assembly and display, which is applied in the direction of light guide of lighting system, parts of lighting device, light guide, etc., can solve the problem of reducing the value and the like

Active Publication Date: 2015-11-25
CONTINENTAL AUTOMOTIVE SYST INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Like screen printing, microlenses also reduce the amount of light passing through the diffuser, resulting in an overall dimmer illumination

Method used

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  • Light guide assembly for display illumination
  • Light guide assembly for display illumination
  • Light guide assembly for display illumination

Examples

Experimental program
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Effect test

Embodiment Construction

[0015] figure 1 A cross-sectional view of light housing assembly 10 including opaque light box 20 is schematically shown. The light guide 40 is disposed within the light box 20 . The light guide 40 includes a reflective surface 42 that reflects light along the length of the light guide 40 . The light guide 40 also includes a light receiving surface 44 . The light receiving surface 44 is provided adjacent to and facing the light source 30 such as an LED. When the light source 30 emits light, the light enters the light guide 40 through the light receiving surface 44 and is reflected along the light guide 40 .

[0016] The light escapes from the light guide 40 as it is reflected along the light guide 40 . Opaque light box 20 reflects light and prevents light from escaping light housing assembly 10 except through openings covered by diffuser 50 . Furthermore, light traveling generally perpendicular to diffuser 50 appears brighter to an observer than light traveling generally ...

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PUM

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Abstract

A light guide assembly for an instrument display includes a light housing, a light source and a light guide. The light guide directs light from the light source through an opening in the light housing, and includes at least a first branch and a second branch. A diffuser is disposed above an opening in the light housing. The diffuser includes a bottom surface facing an interior of the light housing and a top surface facing opposite the bottom surface. A dimming feature is disposed on a portion of the top surface of the diffuser, such that the dimming feature reduces a brightness of the portion of the top surface thereby maintaining at least approximately a constant brightness across the diffuser.

Description

technical field [0001] The present disclosure relates generally to a light envelope for an instrument panel, and more particularly to a light envelope that includes a concentrated light source. Background technique [0002] Traditional methods of illuminating an instrument panel include positioning a light housing (alternatively referred to as a light box) and a diffuser behind the instrument panel, thereby illuminating the instrument panel. The light housing contains a light guide that redirects light across the light housing from a light source, such as an LED, behind the light housing. Light escapes the light guide at various points as it travels along the light guide, thereby distributing the light throughout the light envelope. A diffuser is placed to cover the front facing opening of the light housing and further diffuse light escaping from the light guide. [0003] Due to the nature of the light guide, a typical light housing diffuser includes light and dark portion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V8/00F21V5/08
CPCG02B6/0051F21S8/10F21V13/02G02B6/00G02B6/0045G02B6/0053
Inventor V.B.伯曼R.D.桑德斯
Owner CONTINENTAL AUTOMOTIVE SYST INC
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