US 7,468,764 B2
Liquid crystal display panel and liquid crystal display apparatus
Hiroshi Fukushima, Yamatokoriyama (Japan); Koji Yabuta, Kashiba (Japan); Tomoo Takatani, Nara (Japan); and Masakazu Wada, Kyoto (Japan)
Assigned to Sharp Kabushiki Kaisha, Osaka (Japan)
Appl. No. 10/598,952
PCT Filed Mar. 15, 2005, PCT No. PCT/JP2005/004528
§ 371(c)(1), (2), (4) Date Apr. 11, 2007,
PCT Pub. No. WO2005/091060, PCT Pub. Date Sep. 29, 2005.
Claims priority of application No. 2004-079230 (JP), filed on Mar. 18, 2004.
Prior Publication US 2007/0242185 A1, Oct. 18, 2007
Int. Cl. G02F 1/1335 (2006.01)
U.S. Cl. 349—67  [385/65] 9 Claims
OG exemplary drawing
 
1. A liquid crystal display panel comprising a liquid crystal layer filled between a pair of transparent substrates, the liquid crystal display panel further comprising:
a first optical-path changing layer, on a front-face side of a rear-face side transparent substrate, that has a refractive index substantially equal to a refractive index of the rear-face side transparent substrate, and that includes a predetermined protrusion and a predetermined depression, the rear-face side transparent substrate being one of the pair of transparent substrates that is provided on a side which becomes a rear side when an observer views the liquid crystal display panel;
a low refractive-index layer, on a front-face side of the first optical-path changing layer, that is in contact with the predetermined protrusion and the predetermined depression of the first optical-path changing layer, and that has a refractive index that is smaller than the refractive index of the first optical-path changing layer; and
a second optical-path changing layer, on a rear-face side of the rear-face side transparent substrate, that includes a predetermined protrusion and a predetermined depression.