发明名称 |
Backlight unit and liquid crystal display device using the same |
摘要 |
A backlight unit having a LED light source includes a light guide plate partitioned in areas each having a tapered shape formed of a thick portion and a thin portion. The light guide plate is formed such that a thick portion and a thin portion are repeated at certain intervals, and the repeated thick portions and the repeated thin portions gradually decrease in thickness. The LED light source is attached to a lateral side of each thick portion. Grooves are formed in the light irradiation direction of the LED light source and in a direction perpendicularly intersecting the light irradiation direction. Each of the grooves is formed in an concave shape (V-shape or trapezoid-shape). There is a relation 0.2/30<=W/D<0.1 where D denotes the distance between the light guide plate and a light diffusion plate, and W denotes the width of each of the grooves. An inclination angle &thetas; relative to the center of each of the grooves is between 9 and 15 degrees inclusive. Thus, the backlight unit having the LED light source can utilize an area-partitioned light guide plate which provides an ideal front luminance distribution. |
申请公布号 |
US8111354(B2) |
申请公布日期 |
2012.02.07 |
申请号 |
US20100684875 |
申请日期 |
2010.01.08 |
申请人 |
OUCHI SATOSHI;SAKITA KOICHI;INOUE HAJIME;MURATA SEIJI;HITACHI CONSUMER ELECTRONICS CO., LTD. |
发明人 |
OUCHI SATOSHI;SAKITA KOICHI;INOUE HAJIME;MURATA SEIJI |
分类号 |
G02F1/1333 |
主分类号 |
G02F1/1333 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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