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:
Jul. 22, 2003
Filed:
Jun. 13, 2001
Jong Weon Moon, Seoul, KR;
Yong Beom Kim, Kyunggi-do, KR;
LG. Philips LCD Co., Ltd., Seoul, KR;
Abstract
A transparent reflective liquid crystal display device (LCD) is provided that is adaptive for improving a light efficiency and color purity. In the device, a first circular polarizer transmits circular-polarized light having a first direction input from the backlight unit while reflecting circular-polarized light having a second direction contrary to the first direction. A second circular polarizer is arranged in opposition to the first circular polarizer to transmit the circular-polarized light having the second direction while reflecting the circular-polarized light having the first direction. A circular-polarizing color filter is provided at one side of the second circular polarizer to extract circular-polarized light of a specific visible light wavelength band in the circular-polarized light having the first direction. A reflecting member is arranged in opposition to the second circular polarizer to reflect external light, and has a hole formed in opposition to the circular-polarizing color filter to transmit the circular-polarized light having the specific visible light wavelength band via the hole. An absorptive color filter and a CLC color filter may be used in the LCD to improve color purity.