公开(公告)号：US20190146141A1

公开(公告)日：2019-05-16

申请号：US16228708

申请日：2018-12-20

Applicant: Lextar Electronics Corporation

Inventor： Teng-Huei HUANG ,  I-Chang TSAO ,  Cheng-Ta KUO ,  Jhih-Han LIN ,  Wei-Jung CHANG ,  Sheng-Ju CHUNG ,  Li-Li LIU ,  Wen ZHOU

IPC: F21V8/00

Abstract: A frameless panel light includes a light source module and a lamp cover having a front portion and side portions surrounding the front portion. The front and side portions define an accommodating space. The light source module is disposed in the accommodating space and includes a light source and a light guide plate. The light guide plate includes a light-transmissive substrate including first and second major surfaces and a side surface connecting the first and second major surfaces and a microstructure formed on the first major surface and including a recess and an annular groove around the recess. The annular groove has a depth greater than that of the recess. A bottom of the recess is at higher elevation than the first major surface from the second major surface. The annular groove has a protruding portion protruding from a bottom of the annular groove.

公开(公告)号：US20190121014A1

公开(公告)日：2019-04-25

申请号：US15791429

申请日：2017-10-24

Applicant: Lextar Electronics Corporation

Inventor： Teng-Huei HUANG ,  I-Chang TSAO ,  Cheng-Ta KUO ,  Jhih-Han LIN ,  Wei-Jung CHANG ,  Sheng-Ju CHUNG ,  Li-Li LIU ,  Wen ZHOU

IPC: F21V8/00 ,  B29C33/42

Abstract: A light guide plate includes a light-transmissive substrate and at least one microstructure. The light-transmissive substrate includes first and second major surfaces and a side surface connecting the first and second major surfaces. The microstructure is formed on the first major surface. The microstructure comprises a recess and an annular groove around the recess. The annular groove has a depth greater than a depth of the recess. A bottom of the recess is at higher elevation than the first major surface from the second major surface.