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:
Mar. 30, 2004
Filed:
Nov. 26, 2002
Takahisa Ando, Nara, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
There is provided a video providing apparatus capable of giving clear video to a patient with an eye disease. The video providing apparatus comprises a parallel light source or a parallel light type LED as a light source. Video light obtained by passing light from the light source through a liquid crystal display panel is supplied to an ocular optical system (Maxwellian view). In this configuration, the ocular optical system comprises a lens and a pinhole. The lens is provided such that the rear focal point thereof is positioned in close proximity to the eyeball of a viewer (a patient with an eye disease). The pinhole is arranged at the rear focal point, thereby causing a viewer to view video by Maxwellian view.