Patent · US Expired

Display device

US7128431B2 · kind B2 · utility

15Cited by

9References

14Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Bernd Ludewig · Weinheim, DE
Ralf Mayer · Weitra, AT
Heinrich Noll · Groß-Umstadt, DE

Key dates

Filing date	Oct 1, 2002
Grant date	Oct 31, 2006
Priority date	—
Expiry date	Nov 5, 2022

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S362/80
WIPO fieldOptics
WIPO sectorInstruments

Abstract

The invention relates to a display device, especially in a motor vehicle, comprising a display (2) which can be illuminated by a light source (1), and a light guide (7) which is arranged between the light source (1) and the display (2). Said light source (1) comprises a plurality of individual light sources (10), the entire light-radiating surface of said light sources being larger than the surface of the display (2). In order to increase the light efficiency, the light guide (7) comprises, on the light source side, individual light guiding sections (12) which are associated with the individual light sources (10), said sections forming a common light guiding section (13) on the display side.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.