Title:
発光装置およびこれを備える照明装置
Document Type and Number:
Japanese Patent JP4350144
Kind Code:
B2
Abstract:
A light-emitting device (10) includes: a light-emitting element (1); and a light flux controlling member (2) for controlling light emitted from the light-emitting element (1), the light flux controlling member (2) has (i) a light-incoming surface (2a) which the light emitted from the light-emitting element (1) enters and (ii) a light-outgoing surface (2b), and the following equation (1) is satisfied where r is a length, from a light axis Z of the light-emitting device (10), of a plane that is provided at a certain distance from the light flux controlling member (2) in a direction parallel to the light axis Z so as to be perpendicular to the light axis Z, Æ 1 is an angle between the light emitted from the light-emitting element (1) and the light axis, P(Æ 1 ) is a light distribution property of the light-emitting element (1). This provides a light-emitting device that scatters light without generating uneven brightness on a liquid crystal display panel, reduces a reflectance caused by the Fresnel's reflection, and has an improved scattering ability.
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Inventors:
Fumio Kokubo
Application Number:
JP2007208648A
Publication Date:
October 21, 2009
Filing Date:
August 09, 2007
Export Citation:
Assignee:
Sharp Corporation
International Classes:
F21V5/00; F21S2/00; F21V5/04; G02B5/00; G02B5/02; H01L33/00; H01L33/54; H01L33/56; F21Y101/02
Domestic Patent References:
| JP64089377A | ||||
| JP2006310319A | ||||
| JP2006072874A | ||||
| JP2007005733A | ||||
| JP2001250986A |
Attorney, Agent or Firm:
Kenzo Hara International Patent Office
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