-
公开(公告)号:US06607281B2
公开(公告)日:2003-08-19
申请号:US09919773
申请日:2001-08-01
IPC分类号: F21V704
CPC分类号: G02B6/002 , F21V5/00 , G02B6/0031 , G02B6/0086 , G02B6/0091
摘要: A sidelight type light source device increases the quantity of light in a corner portion of a light guide plate at low cost while meeting a demand for picture frame narrowing. An incident surface receives light from a stick-shaped light source. The incident surface includes a first incident surface its center a pair or second incident surfaces at the ends of the first incident surface. The second incident surfaces are formed on a corner portion in a width direction of the light guide plate. The second incident surfaces are set back from the first incident surface taken as a reference. Accordingly, a light introducing route is defined between the second incident surface and rubber blocks at the ends of a fluorescent light source. Light from the fluorescent lamp passes along the light introducing route where it is directly incident on the second incident surfaces of the light guide plate.