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lighting equipment

A technology for lighting fixtures and light guides, which is applied to lighting devices, fixed lighting devices, light guides of lighting devices, etc., can solve the problems of light propagation loss of light guides, reduction of light utilization efficiency of light-emitting elements, etc.

Active Publication Date: 2021-06-01
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the above-mentioned conventional lighting fixtures, there is a problem that light propagation loss occurs in the light guide portion, and the utilization efficiency of light from the light-emitting element decreases.

Method used

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Experimental program
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Effect test

Embodiment approach

[0044] Hereinafter, a lighting fixture according to an embodiment will be described.

[0045] [1.Structure of lighting equipment]

[0046] [1-1. The overall structure of lighting fixtures]

[0047] First, refer to Figure 1 to Figure 5 , the overall configuration of the lighting fixture 2 according to the embodiment will be described. figure 1 It is a perspective view which shows the appearance of the floor side of the lighting fixture 2 which concerns on embodiment. figure 2 It is a perspective view which shows the appearance of the ceiling 4 side of the lighting fixture 2 which concerns on embodiment. image 3 It is an exploded perspective view showing the lighting fixture 2 according to the embodiment in a state where the diffuser cover 26 is removed. Figure 4 It is an exploded perspective view showing the lighting fixture 2 according to the embodiment in a state where the decorative cover 20 , the light guide plate 22 , and the reflection member 24 are removed. Fig...

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PUM

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Abstract

Provided is a lighting fixture capable of improving the utilization efficiency of light from a light emitting element. A lighting fixture (2) includes a second light emitting element (46) and a light guide plate (22) for guiding light from the second light emitting element (46) in a predetermined direction. The light guide plate (22) includes: an incident part (22c) for incident light from the second light emitting element (46); an outgoing part (22d) for emitting light incident on the incident part (22c); and a light guide part (22b ), extending curvedly from the incident part (22c) to the outgoing part (22d), with a first reflective surface (70) and a second reflective surface (72) on the outer peripheral surface. The first reflective surface (70) forms a parabola with focus F in the cross section when the light guide part (22b) is cut on a virtual plane, and the second reflective surface (72) is arranged at a lower position than the first reflective surface (70) in the cross section. ) is close to the side of the emitting part (22d), and is disposed at a position intersecting an imaginary straight line (76, 78) passing through the first reflective surface (70) and the focal point F.

Description

technical field [0001] The present invention relates to a lighting fixture using a light guide plate. Background technique [0002] A lighting fixture using a light guide plate is known (for example, refer to Patent Document 1). The light guide plate includes an incident portion into which light from the light emitting element enters, an exit portion that emits light incident on the incident portion, and a light guide portion formed between the incident portion and the exit portion. The light guide part bends and extends from the incident part to the outgoing part. The light incident on the light guide from the incident part is reflected on the outer peripheral surface (convex surface) of the light guide and guided to the output part. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2013-101858 [0004] However, in the above-mentioned conventional lighting fixtures, there is a problem that light propagation loss occurs in the light guide portion, and the utilizat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21S8/04F21V8/00F21V5/02F21Y115/10
CPCF21S8/04F21V5/02F21V2200/20F21Y2115/10
Inventor 松崎纯平关井广行村上忠史棚桥理阿南真一
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD