Frishauf, Holtz, Goodman, Langer & Chick, P.C.
Illumination panel and display device using the same
 An illumination panel comprises a light source, a photoconductor for guiding light from the light source, and an optical film for emitting light emitted from the photoconductor ahead of an observer. The photoconductor comprises a stepwise face having an incident end face onto which the light from the light source is projected, step faces, and step differentiating faces for emitting the light guided from the light source and connecting the step faces, and reflective films formed on the step faces. The optical film is arranged at the front side of the photoconductor, and has projected incident portions which are opposite to the step differentiating faces in a light emitting direction. The optical film emits the light emitted from the step differentiating faces ahead, and causes the light that is projected from the front to be reflected ahead on reflective faces on the step faces. In the incident portions, one of side faces opposite to the step differentiating faces of the photoconductor makes an incident face for receiving the light emitted from the step differentiating faces, and the other makes a refractive face for reflecting/refracting the light taken in the incident face toward its front face. A liquid crystal display element is arranged at the front of this illumination panel so that they constitute a liquid crystal display device. 
Casio Computer Co., Ltd.
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inventional inventional additional additional additional additional
Tetsuo Yasuhiro Masaru Minoru
Muto Daiku Higuchi Fujiwara