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:
May. 19, 1987
Filed:
Jun. 07, 1985
Douglas J Herst, Ross, CA (US);
Peter Y Ngai, Lafayette, CA (US);
Peerless Lighting Corporation, Berkeley, CA (US);
Abstract
The luminaire includes a source of light in an opaque housing which extends beneath the source and upwardly about the sides of the source to hide the source from direct view from a horizontal line of sight even with the source. A lens is mounted to the housing above the source and extending around to join with the upper edge of the housing. The lens includes an upper light-dispersing portion which diverges one portion and only displaces another portion of the light from the source to provide an even distribution of luminance to a ceiling above the source. The lens also includes a lateral light-bending portion which receives light from the source and fans it out laterally over the side of the housing to continue the uniform illumination pattern of the ceiling and to illuminate vertical surfaces in the vicinity of the luminaire. A reflector beneath the source directs light onto the lateral light-bending portion of the lens to at least partly compensate for the fact that the light passing through the lateral portion of the lens normally travels farther to the surface it is illuminating and also strikes any horizontal surface at an increased angle of incidence. The lens and housing cooperate to enclose the source of light to prevent dust from entering, and the lateral portion of the lens provides a visible source of light to a person in the room being illuminated.