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Patent Searching and Data


Title:
LIGHT GUIDE DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/164108
Kind Code:
A1
Abstract:
A light guide device (40) comprising a light guide plate (45) and a reflection sheet (50). The light guide plate (45) has: an incident end surface (43a) having a light-receiving surface; a lower base surface having a deflection surface (41); and an upper base surface having an internal reflection surface (42). The reflection sheet (50) faces the internal reflection surface (42). The deflection surface (41) has a plurality of grooves (47a–d). The grooves (47a–d) smoothly meander, when the light guide plate (45) is viewed in the planar view. The upper base surface also has protruding ridges (51) provided in the internal reflection surface (42). In a cross-section parallel to the normal direction of the light-receiving surface and the normal direction of a reference plane (Ps) in which the light guide plate (45) expands, the average gradient of a side section of the contour lines of the grooves (47a–d) relative to the reference plane (Ps) is 12.5–20° on the light-receiving surface side.

Inventors:
KINOSHITA SEIJI (JP)
Application Number:
PCT/JP2018/008532
Publication Date:
September 13, 2018
Filing Date:
March 06, 2018
Export Citation:
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Assignee:
KURARAY CO (JP)
International Classes:
F21S2/00; F21V8/00; G02B6/00; F21Y115/10
Foreign References:
JP2011040369A2011-02-24
JP2008218418A2008-09-18
JP2015115253A2015-06-22
JP2005500651A2005-01-06
Attorney, Agent or Firm:
IEIRI Takeshi (JP)
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