Title:
PLANAR LIGHT SOURCE DEVICE AND DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/064614
Kind Code:
A1
Abstract:
A planar light source device according to the present invention has: a housing, a substrate, a plurality of light-emitting devices each having a light-emitting element and a light-beam control member; and a light diffusing member. The housing has: a bottom surface on which the substrate is disposed; and two inclined surfaces that are connected to both sides of the bottom surface, respectively, in a direction orthogonal to the direction in which the light-emitting devices are arrayed and that come closer to the light diffusing member as the distances from the bottom surface increase. In the light distribution characteristics of a light-emitting device, a light ray with the largest angle relative to the optical axis in an angular range within which a luminous intensity equal to or more than 70% of the maximum luminous intensity is exhibited reaches the inclined surfaces. In a cross section orthogonal to the direction in which the light-emitting devices are arrayed, a first angle between the optical axis of the light-emitting element and a light ray having the maximum luminous intensity emitted from the light-emitting device is larger than a second angle between the optical axis of the light-emitting element and a straight line connecting the luminescence center of the light-emitting element to the opening-side end portion of the housing.
More Like This:
| JP7308083 | vehicle lamp |
| JP2008059862 | VEHICULAR LIGHTING FIXTURE |
| JPH08329701 | LAMP STRUCTURE AND ITS MANUFACTURE |
Inventors:
NONAKA RYO
YAMADA KYOUHEI
YAMADA KYOUHEI
Application Number:
PCT/JP2017/043666
Publication Date:
April 04, 2019
Filing Date:
December 05, 2017
Export Citation:
Assignee:
ENPLAS CORP (JP)
International Classes:
F21S2/00; F21V5/00
Domestic Patent References:
| WO2011096192A1 | 2011-08-11 |
Foreign References:
| JP2012231023A | 2012-11-22 | |||
| JP2012243396A | 2012-12-10 |
Attorney, Agent or Firm:
WASHIDA, Kimihito (JP)
Download PDF: