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Displaying-device-having-two-separate-light-receiving-portions-for-receiving-the-external-light-and-the-light-emitted-by-a-light-source

Optical component and method of manufacture

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Displaying device having two separate light receiving portions for receiving the external light and the light emitted by a light source

Details

Inventors: Miyadera, Shunichi;
Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha (Tokyo, JP)
Primary Examiner: Miller; Stanley D.
Assistant Examiner: Mai; Huy K.
Attorney, Agent or Firm: Sandler, Greenblum & Bernstein

A displaying device having a liquid crystal display, a light source, and an illuminating member. The displaying device is provided with at least two light receiving portions for respectively receiving external light and the light emitted by the light source. The illuminating surface of the illuminating member is arranged to face the back surface of the liquid crystal display for illuminating the liquid crystal display from behind. A casing for fixedly accommodating the liquid crystal display, the light source, and the light transmitting member therein is provided. The external light and the light emitted by the light source is selectively or simultaneously received by the illuminating member to illuminate the back surface of the liquid crystal display.

DETAILED DESCRIPTION What is claimed: 1.
A displaying device comprising: a liquid crystal display having a back surface; a light source; a light transmitting member having at least two separate light receiving portions, said separate light receiving portions comprising a first receiving portion for receiving external light and a second light receiving portion for receiving the light emitted by said light source, an illuminating surface of said light transmitting member being arranged to face the back surface of said liquid crystal display for illuminating said liquid crystal display from behind, said first and second light receiving portions each being substantially perpendicular to said illuminating surface; and a casing for accommodating said liquid crystal display, said light source, and said light transmitting member therein.
2.
The displaying device according to claim 1, wherein said first and second light receiving portions are located on respective peripheral surfaces of said light transmitting member; and wherein said casing includes openings at the portions corresponding to said respective first and second light receiving portions.
3.
The displaying device according to claim 2, wherein the surfaces of said light transmitting member other than said illuminating surface and said light receiving portions are covered with at least an inner surface of said casing, and wherein said surface of said casing which covers said light transmitting member is adapted to reflect light so that the light directed towards any direction is directed towards said illuminating surface.
4.
The displaying device according to claim 1, which further comprises select means for causing said light transmitting member to selectively receive one of the external light and the light emitted by said light source.
5.
The displaying device according to claim 1, wherein said light receiving portions are located on respective opposite peripheral surfaces of said light transmitting member, and wherein said casing includes two openings corresponding to said respective light receiving portions on the opposite surfaces thereof

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