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:
Jun. 08, 2004
Filed:
May. 30, 2001
Tomohisa Hamano, Tokyo, JP;
Mitsuru Kitamura, Tokyo, JP;
Daijiro Kodama, Tokyo, JP;
Hiroshi Fujita, Tokyo, JP;
Hideo Yabuhara, late of Tokyo, JP;
Dai Nippon Printing Co., Ltd., Tokyo, JP;
Abstract
The invention provides a computer-generated hologram which can be viewed in white at the desired viewing region and a reflective liquid crystal display using the same as a reflector. The computer-generated hologram H is designed to diffuse light having a given reference wavelength &lgr; and incident thereon at a given angle of incidence &thgr; in a specific angle range. In a range of wavelengths &lgr; to &lgr; including the reference wavelength &lgr; wherein zero-order transmission light or zero-order reflection light of incident light on the computer-generated hologram at a given angle of incidence is seen in white by additive color mixing, the maximum diffraction angle &bgr; of incident light of the minimum wavelength &lgr; in the wavelength range and incident at the angle of incidence &thgr; is larger than the minimum diffraction angle &bgr; of incident light of the maximum wavelength &lgr; in the wavelength range and incident at said angle of incidence &thgr;.