The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 21, 2000
Filed:
Jan. 20, 1999
Ying Bao Yang, Kanagawa, JP;
Tetsuo Urabe, Kanagawa, JP;
Yukio Kinoshita, Kanagawa, JP;
Hideo Kataoka, Kanagawa, JP;
Takayuki Fujioka, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A reflection type display device includes a panel, a light guide plate placed external to the panel, and a light source placed at the end of the light guide plate for generating illumination light as required. The light guide plate normally transmits external light onto a first substrate of the panel and emits the external light reflected from a second substrate of the panel, while, as required, guides illumination light onto the first substrate and emits the illumination light reflected from the second substrate. The light guide plate includes a planar section divided into bands and an inclined section lying between each planar section. The light guide plate reflects the illumination light guided from the light source at each inclined section so as to lead it onto the first substrate and emits the illumination light reflected from the second substrate through each planar section and inclined section. The width of the planar section is set to 15 or more times, or preferably 20 or more times, the width of the inclined section.