Patent · US Expired

Illumination device and display apparatus including same

US5929951A · kind A · utility

20Cited by

5References

7Claims

0Family size

Assignee

Canon Kabushiki Kaisha · JP

Inventors

Takao Sasakura · Yokohama, JP
Noritaka Mochizuki · Yokohama, JP
Hiroaki Hoshi · Yokohama, JP

Key dates

Filing date	Oct 20, 1995
Grant date	Jul 27, 1999
Priority date	—
Expiry date	Oct 20, 2015

Classification

Technology area (CPC G)Physics
CPC primaryG02F1/133607
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A display apparatus is constituted by a planar display device and a planar illumination device therefor. A lowering in light quantity at a periphery of the planar illumination device is prevented by inserting a reflection member, such as a reflection frame, having an inside reflection surface along the periphery of the illumination device, or a combination of a scattering means and a transparent sheet member between the display device and the illumination device. A plurality of the display apparatus may be combined to allow an associate movement thereof so as to constitute a composite display apparatus, such as a head-mount display.

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