US 7,575,359 B2
Light guide plate, method and apparatus for producing same, and light source device and liquid crystal display utilizing same
Kazuhisa Saito, Minato-ku (Japan)
Assigned to Worldvision Co., Ltd., Minato-ku, Tokyo (Japan)
Appl. No. 10/562,960
PCT Filed Mar. 24, 2004, PCT No. PCT/JP2004/004021
§ 371(c)(1), (2), (4) Date Dec. 30, 2005,
PCT Pub. No. WO2005/001334, PCT Pub. Date Jan. 05, 2006.
Claims priority of application No. 2003-205523 (JP), filed on Jun. 30, 2003; and application No. 2003-436547 (JP), filed on Dec. 16, 2003.
Prior Publication US 2006/0146575 A1, Jul. 06, 2006
Int. Cl. F21V 8/00 (2006.01)
U.S. Cl. 362—625  [362/623; 362/626] 9 Claims
OG exemplary drawing
 
1. A light guide plate characterized in comprising:
a transparent plate having light-transmitting characteristics;
a first snaking pattern of grooves formed on said transparent plate; and
a second pattern of grooves that is formed to intersect or contact with said first pattern of grooves on said surface, said second pattern of grooves is formed in a snaking pattern;
wherein the light that passes though said transparent plate is reflected by said first pattern of grooves and said second pattern of grooves;
characterized in that said first pattern of grooves and said second pattern of grooves intersect or contact with each other as a result of having said first pattern of grooves' and said second pattern of grooves' translating directions are set substantially parallel to each other and their snaking phases we set different from each other.