Title:
LIGHT-CONTROL ELEMENT, DISPLAY DEVICE, AND ILLUMINATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/060247
Kind Code:
A1
Abstract:
This light-control element is provided with: a plurality of light-emitting elements that are configured in a manner so as to control the amount of light that is radiated; a light-guide body that has a plurality of light extraction regions that extract any of the plurality of light beams to the outside while the light is being propagated; a first prism structure that transmits light entering from at least one of the plurality of light-emitting elements and radiates the light to the light-guide body; and a low-refractive-index body that has a lower refractive index than the refractive index of the light-guide body and that suppresses the entrance of light propagating within the light-guide body to the first prism structure. The first prism structure has at least one tilted surface having at least one type of tilt angle; the pathway of at least a portion of the plurality of light radiated from the plurality of light-emitting elements passes through the tilted surface; at least two light extraction regions from among the plurality of light extraction regions have mutually different ranges of angle of incidence at which light propagating within the light-guide body can be extracted to the outside; and each of the plurality of light beams radiated from the plurality of light-emitting elements is propagated at a different angle of propagation within the light-guide body.
Inventors:
KATSUTA Shohei (())
Application Number:
JP2011/074503
Publication Date:
May 10, 2012
Filing Date:
October 25, 2011
Export Citation:
Assignee:
Sharp Kabushiki Kaisha (22-22, Nagaike-cho Abeno-ku, Osaka-sh, Osaka 22, 〒5458522, JP)
シャープ株式会社 (〒22 大阪府大阪市阿倍野区長池町２２番２２号 Osaka, 〒5458522, JP)
シャープ株式会社 (〒22 大阪府大阪市阿倍野区長池町２２番２２号 Osaka, 〒5458522, JP)
International Classes:
F21S2/00; G02F1/13357; F21Y101/02
Attorney, Agent or Firm:
FUNAYAMA Takeshi et al. (1-9-2, Marunouchi Chiyoda-k, Tokyo 20, 〒1006620, JP)
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Claims:
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