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    • 65. 发明授权
    • Planar illumination device and display device provided with the same
    • 平面照明装置及其配备的显示装置
    • US08672528B2
    • 2014-03-18
    • US13508552
    • 2010-10-01
    • Yuhsaku AjichiTomohiko Yamamoto
    • Yuhsaku AjichiTomohiko Yamamoto
    • F21V7/04
    • G02F1/133512G02B6/0031G02B6/0051G02B6/0053G02B6/0056G02B6/0088G02F1/133536G02F1/133615
    • An object is to implement a narrowed picture-frame while suppressing the occurrence of light leakage and a reduction in luminance in an edge-light type backlight device. A backlight device is composed of LEDs (40); a side chassis (51) supporting a board having the LEDs (40) mounted thereon; a light guide plate (20) for allowing light emitted from the LEDs (40) to exit toward a liquid crystal panel in a planar manner; a reflection sheet (30) for allowing light traveling toward a back surface side within the light guide plate (20) to be reflected thereby; optical sheets (10) including a reflection type polarizer (11), a prism sheet (12), and a diffuser (13); and a top chassis (52) disposed on top of the optical sheets (10). Black printing (60) is provided in a part of the region of the diffuser (13). A length of the reflection type polarizer (11) is longer than a length of the light guide plate (20) such that an edge of the reflection type polarizer (11) is located closer to a side of the LEDs (40) than is an edge surface of the light guide plate (20).
    • 本发明的目的是在抑制边缘光型背光装置中的光泄漏的发生和亮度的降低的同时实现缩小的相框。 背光装置由LED(40)构成; 支撑安装在其上的LED(40)的板的侧面底架(51) 导光板(20),其用于使从所述LED(40)发射的光以平面方式朝向液晶面板排出; 用于允许在导光板(20)内朝向背面侧移动的光被反射的反射片(30) 包括反射型偏振器(11),棱镜片(12)和扩散器(13)的光学片(10) 以及设置在所述光学片(10)的顶部上的顶板(52)。 黑色印刷(60)设置在扩散器(13)的区域的一部分中。 反射型偏振器(11)的长度比导光板(20)的长度长,使得反射型偏振片(11)的边缘比LED(40)的一侧更靠近LED 导光板(20)的边缘表面。