Lighting device and liquid crystal display

Application Number: 00108215
Application Date: 2000.04.30
Publication Number: 1272635
Publication Date: 2000.11.08
Priority Information: 1999/4/30 JP 123721/1999
International: G02F1/1335;F21V8/00
Applicant(s) Name: Matsushita Electric Industrial Co., Ltd.
Inventor(s) Name: Kubota Koshi;Nakao Kenji;Uemura Kyo
Patent Agency Code: 11038
Patent Agent: ma jiangli
Abstract In a liquid crystal display device including a light-collecting unit 17 and a light-guiding unit 18. The light-collecting unit 17 collects and captures ambient light, and converts the ambient light into a transmitting light which transmits in the light-collecting unit 17. The light-guiding unit 18 connected to the light-collecting unit 17 redirects a light path of the transmitting light from the light-collecting unit 17 so that the transmitting light proceeds to the back of a liquid crystal panel 15. Thus, unlike conventional light-collecting units, a light-collecting unit of the invention is composed of two separated units, one being a light-collecting unit for converting ambient light into a transmitting light and the other being a light-guiding unit for guiding the transmitting light to the liquid crystal panel. This configuration attains an increase in an occupied area of the light-collecting unit and thereby achieves an increased brightness of the liquid crystal display device.