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. 09, 2000
Filed:
Jan. 12, 1999
Tooru Ukita, Tokyo, JP;
Shin Koide, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
There is provided a reflection type liquid crystal display including (a) a first substrate having a roughened surface, (b) a second substrate spaced away from the first substrate in opposing relation to the roughened surface of the first substrate, (c) a liquid crystal layer sandwiched between the first and second substrates, (d) a metal film formed on the roughened surface of the first substrate for reflecting lights therefrom, (e) a transparent dielectric film formed on the metal film, the transparent dielectric film having a planarized upper surface, (f) a plurality of transparent pixel electrodes formed on the transparent dielectric film, and (g) a plurality of switching devices formed on the transparent dielectric film, each of the switching devices being electrically connected with each of the transparent pixel electrodes, the transparent pixel electrodes and the switching devices being arranged in a matrix. The above-mentioned reflection type liquid crystal display makes it possible to provide an excellent light diffusion and reflection function without special technique. In particular, it is possible to reduce the number of photolithography steps for fabricating an active matrix type substrate, ensuring lower fabrication costs and a higher fabrication yield.