Title:
LIGHT GUIDE PLATE HAVING HIGH LIGHT EXIT EFFICIENCY, UNIFORM LIGHT SURFACE, AND NO VISUAL SPOT
Document Type and Number:
WIPO Patent Application WO/2018/166007
Kind Code:
A1
Abstract:
A light guide plate having a high light exit efficiency, a uniform light surface, and no visual spot. A pair of opposite two sides of the light guide plate are light source sides (3); a scattering surface of the light guide plate is a smooth surface (1) and closely provided with multiple dots; an exit surface of the light guide plate is an undulating surface (2) that periodically undulates in the shape of a cos curve; the two light source sides (3) are located at two ends of the undulating surface (2) along an undulating direction; a spacing of adjacent two dots along a light incident direction at the two sides separately and gradually decreases from the two light source sides (3) to the centerline of the light guide plate. Even though dust is attached on the undulating surface (2) of the light guide plate, no white spot, bright spot, spot and the like on the undulating surface (2) can be observed, so that the appearance of the lamp is ensured and the light exit efficiency is not affected; dot density increases from two sides to the center, thereby greatly increasing the scattering area of the dots, and therefore, the light exit efficiency is high, and the emitted light is uniform.
Inventors:
XU XIANGYANG (CN)
Application Number:
PCT/CN2017/079693
Publication Date:
September 20, 2018
Filing Date:
April 07, 2017
Export Citation:
Assignee:
JIANGSU SUN & MOON LIGHTING CO LTD (CN)
International Classes:
F21V8/00; G02F1/13357
Foreign References:
| CN101994995A | 2011-03-30 | |||
| CN101737726A | 2010-06-16 | |||
| CN102242879A | 2011-11-16 | |||
| CN1758074A | 2006-04-12 | |||
| CN103149626A | 2013-06-12 | |||
| US20150160398A1 | 2015-06-11 |
Attorney, Agent or Firm:
CHANGZHOU BAIYETENGFEI PATENT AGENCY (GENERAL PARTNERSHIP) (CN)
Download PDF: