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    • 8. 发明授权
    • Illumination apparatus for planar display device
    • 平面显示装置照明装置
    • US06935764B2
    • 2005-08-30
    • US10259842
    • 2002-09-30
    • Jin-seung ChoiHwan-young ChoiJee-hong MinSu-mi LeeJin-hwan KimMoon-gyu Lee
    • Jin-seung ChoiHwan-young ChoiJee-hong MinSu-mi LeeJin-hwan KimMoon-gyu Lee
    • G02B6/00F21V8/00F21Y101/02G02F1/13357F21V5/00
    • G02B6/002G02B6/0068
    • An illumination apparatus for planar display devices, including an optical element for making light travel parallel to an optical axis, is provided. The illumination apparatus includes a dot light source for radiating light, and a light guide plate having the optical element. The optical element is composed of a first refraction facet, which is adjacent to the dot light source and increases the emission angle of the light, and a second refraction facet, which is isolated a predetermined distance from the first refraction facet while facing the first refraction facet and reduces the emission angle of the light. In this structure, the light travels parallel to the optical axis. In the illumination apparatus, the emission angle of incident light is reduced, preferably, the light travels parallel to the optical axis. Therefore, areas not reached by light, between adjacent dot light sources, are eliminated, and light is uniformly incident upon a hologram so that the luminance and intensity of light emitted from the light guide plate are uniformly distributed.
    • 提供了一种用于平面显示装置的照明装置,包括用于使光行进平行于光轴的光学元件。 照明装置包括用于照射光的点光源和具有光学元件的导光板。 光学元件由与点光源相邻的第一折射面和增加光的发射角的第一折射面和与第一折射面隔开预定距离而面向第一折射的第二折射面 并减少光的发射角。 在这种结构中,光平行于光轴行进。 在照明装置中,入射光的发射角度减小,优选地,光平行于光轴行进。 因此,消除了相邻点光源之间未被光照射的区域,并且光均匀地入射到全息图上,使得从导光板发射的光的亮度和强度均匀分布。