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    • 4. 发明申请
    • LIGHT GUIDE UNIT AND BACKLIGHT UNIT AND DISPLAY DEVICE USING THE LIGHT GUIDE UNIT
    • 光导向单元和背光单元以及使用光导向单元的显示设备
    • US20080123350A1
    • 2008-05-29
    • US11830165
    • 2007-07-30
    • Kyu-min CHOEMoon-gyu LeeJee-hong Min
    • Kyu-min CHOEMoon-gyu LeeJee-hong Min
    • F21V13/04F21V5/00
    • G02B6/0021G02B6/0016G02B6/0046G02B6/0053G02F1/133606
    • A light guide unit and a backlight unit and display device using the light guide unit are provided. The light guide unit includes a light guide body that is formed of a transparent material and has at least one concave portion with a concavely depressed bottom surface to accommodate a light source. The light guide body includes a first incidence surface forming a top surface of the concave portion, the first incidence surface patterned such that upwardly incident light is refracted at an oblique angle in a lateral direction; a second incidence surface forming a lateral surface of the concave portion, the second incidence surface to which lateral light is incident; a reflection surface disposed on a bottom surface of the light guide body, which extends from the concave portion; and a refraction surface forming a top surface of the light guide body, the refraction surface through which incident light is refracted and transmitted. The use of the above-described light guide unit leads to a rise in optical efficiency. Also, the backlight unit using the light guide unit can effectively collimate light on a large area and increase a contrast ratio.
    • 提供了导光单元和使用导光单元的背光单元和显示装置。 导光单元包括导光体,该导光体由透明材料形成,并且具有至少一个具有凹陷的底表面以容纳光源的凹部。 导光体包括形成凹部的上表面的第一入射面,第一入射面被图案化,使得向上入射的光沿横向倾斜地折射; 形成所述凹部的侧面的第二入射面,所述第二入射面与所述侧光入射; 反射面,其设置在所述导光体的从所述凹部延伸的底面上; 以及形成导光体的顶面的折射面,入射光通过该折射面被折射和透射。 使用上述导光单元导致光学效率的提高。 此外,使用导光单元的背光单元可以有效地准直大面积上的光并增加对比度。