| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that concerning the conventional enclosed lens type retroreflection sheet (320), light (803) incident from a rear face is reflected (804) by shielding property of aluminum (305) deposited on the outer periphery of a binder layer as shown in Fig. 26 and can not reach a surface, therefore, the conventional enclosed lens type retroreflection sheet can not be used for a display device of a type brightly illuminating a display face (1) by a transmission light method that has an electric light source (5) in a casing inside of an internal illumination type display device of Fig. 3, a light guide type display device or the like in Fig. 4 (not shown) widely spreading regardless of indoor or outdoor. SOLUTION: The display device is provided with the display face comprising a display part, a reflection part, and a rear face part in which incident light from the surface is retroreflected and light from a rear face transmitted. The reflection part is provided with an adhesive, an adsorbent, a resin, glass, ceramic, paint, a storage substance and the like having transparency or light transmission. COPYRIGHT: (C)2007,JPO&INPIT
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