Unlock instant, AI-driven research and patent intelligence for your innovation.

Planar lighting device

A lighting device, a surface-like technology, applied in the directions of lighting devices, lighting device light guides, non-electric lighting devices, etc., can solve problems such as brightness reduction, and achieve the effect of reducing brightness reduction

Active Publication Date: 2020-03-27
MINEBEA CO LTD
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if a long hole extending in a direction intersecting with the incident direction of light from the light source is formed in the light guide plate, the light from the light source will be blocked by the long hole, so that there will be a problem that the brightness will decrease on the back side of the long hole.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Planar lighting device
  • Planar lighting device
  • Planar lighting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] Hereinafter, a planar lighting device according to an embodiment will be described with reference to the drawings. In addition, applications of the planar lighting device are not limited to the embodiments described below. In addition, the drawings are schematic, and it should be noted that the dimensional relationship of each element, the ratio of each element, and the like may be different from reality. In addition, there are also portions in which the relationship and the ratio of mutual dimensions are different among the drawings.

[0016] while referring to figure 1 as well as figure 2 , one The configuration of the planar lighting device 1 according to the embodiment will be described. figure 1 It is a plan view of the planar lighting device 1 of the embodiment, figure 2 yes figure 1 The three-dimensional sectional view of the line A-A in. Additionally, when including figure 1 In the accompanying drawings, a three-dimensional orthogonal coordinate syste...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a planar lighting device. Even if the planar lighting device is provided with a plurality of beautiful and non-lighting areas, the degradation of brightness is prevented. The planar lighting device according to an embodiment has a light source, a light guide plate, and a light shielding sheet. The light guide plate further has a plurality of through-holes that are spaced apart from each other in a direction intersecting a direction in which light emitted by the light source enters into the light-incident surface. The through-holes pass through the light guide plate in athickness direction. The light shielding sheet is disposed so as to cover a portion on the light-emitting surface between adjacent through-holes.

Description

technical field [0001] The present invention relates to planar lighting devices. Background technique [0002] Conventionally, there has been known a so-called edge-light planar lighting device in which a plurality of light sources such as LEDs (Light Emitting Diodes) are arranged at regular intervals along side end surfaces of a light guide plate. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2015-195110. [0004] However, in recent planar lighting devices, holes are required to be provided in the light guide plate in order to arrange a plurality of components such as sensors and cameras. In addition, from the viewpoint of aesthetics, there is also a demand to form the non-light-emitting region formed by providing the hole in a horizontally long shape. Therefore, if a long hole extending in a direction intersecting the incident direction of light from the light source is formed in the light guide plate, the light from the light source will be blocked by the lo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00F21V1/00F21V8/00F21Y115/10
CPCF21S2/00F21V1/00F21V2200/20F21Y2115/10G02B6/0023G02B6/0055G02B6/005G02B6/0091G02B6/0083G02B6/0088
Inventor 吉垣畅彦
Owner MINEBEA CO LTD