Light guide element and lighting fixture

Patent metadata

Field	Value
Publication number	US-2015177442-A1
Application number	US-201514639133-A
Country	US
Kind code	A1
Filing date	Mar 5, 2015
Priority date	Sep 28, 2012
Publication date	Jun 25, 2015
Grant date	—

Abstract

A light guide element and a lighting fixture are described. The light guide element includes a light guide body, first microstructures and second microstructures. The light guide body includes a first light-emitting surface and a second light-emitting surface opposite to and parallel to each other. The first microstructures are disposed on the first light-emitting surface in rows. The second microstructures are respectively corresponding to the first microstructures and are disposed on the second light-emitting surface. In each of the rows, each of the first microstructures laps over the corresponding second microstructure in part in a normal direction of the first light-emitting surface. Overlapping ratio of the first microstructures and the corresponding second microstructures become greater from one end of one of the rows to the other end of the one of the rows.

First claim

What is claimed is:

1 . A light guide element, including:
a light guide body including a first light-emitting surface and a second light-emitting surface opposite to and parallel to each other; plurality of first microstructures, wherein the first microstructures are disposed on the first light-emitting surface in rows; and a plurality of second microstructures respectively corresponding to the first microstructures, wherein the second microstructures are disposed on the second light-emitting surface; wherein in each of the rows, each of the first microstructures laps over the corresponding second microstructure in part in a normal direction of the first light-emitting surface, and wherein overlapping ratios of the first microstructures and the corresponding second microstructures become greater from one end of one of the rows to the other end of the one of the rows.

2 . The light guide element according to claim 1 , wherein the first microstructures include:
a plurality of first arrangements, wherein in the first arrangements, a plurality of pattern centers of a plurality of first ones of the first microstructures are uniformly disposed on a plurality of first suppositional lines, and there is an interval between the adjacent first ones on each of the first suppositional lines; and a plurality of second arrangements, wherein in the second arrangements, a plurality of pattern centers of a plurality of second ones of the first microstructures are uniformly disposed on a plurality of second suppositional lines, there is the interval between the adjacent second ones on each of the second suppositional lines, a starting point of each of the second arrangement is deviated from a starting point of each of the first arrangements by a distance, the distance is less than the interval, and the first arrangements and the second arrangements are interlaced.

3 . The light guide element according to claim 1 , wherein the first microstructures include:
a first arrangement, wherein in the first arrangement, a plurality of pattern centers of a plurality of first ones of the first microstructures are uniformly disposed on a first suppositional line, and there is an interval between the adjacent first ones; and a plurality of second arrangements arranged sequentially, wherein in the second arrangements, a plurality of pattern centers of a plurality of second ones of the first microstructures are uniformly disposed on a plurality of second suppositional lines, there is the interval between the adjacent second ones on each of the second suppositional lines, and a relation between deviation distances of starting points of the second arrangements from a starting point of the first arrangement and distances between the second arrangements and the first arrangement is a functional relation.

4 . The light guide element according to claim 3 , wherein the functional relation is a sinusoidal function relation.

5 . The light guide element according to claim 1 , wherein the first microstructures include:
a first arrangement, wherein in the first arrangement, a plurality of pattern centers of a plurality of first ones of the first microstructures are uniformly and sequentially arranged in a manner of making heights of the pattern centers of the first ones being apart from a first suppositional line very as a sinusoidal function, and there is an interval between the adjacent first ones; and a plurality of second arrangements arranged sequentially, wherein in each of the second arrangements, a plurality of pattern centers of a plurality of second ones of the first microstructures are uniformly and sequentially arranged in a manner of making heights of the pattern centers of the second ones being apart from a second suppositional line very as a sinusoidal function, there is the interval between the adjacent second ones on each of the second suppositional lines, and a relation between deviation distances of starting points of the second arrangements from a starting point of the first arrangement and distances between the second arrangements and the first arrangement is a functional relation.

6 . The light guide element according to claim 5 , wherein the functional relation is a sinusoidal function relation.

7 . A lighting fixture including the light guide element according to claim 1 , and at least one light source disposed at at least one side of the light guide element to provide the light guide element with an incident light.

8 . A light guide element, including:
a light guide body including a first light-emitting surface and a second light-emitting surface opposite to and parallel to each other; a plurality of first microstructures, wherein the first microstructures are disposed on the first light-emitting surface; and a plurality of second microstructures respectively corresponding to the first microstructures, wherein the second microstructures are disposed on the second light-emitting surface; wherein each of the first microstructures laps over the corresponding second microstructure in part in a normal direction of the first light-emitting surface; and wherein the first microstructures and the second microstructures have the same size but different pitches.

9 . The light guide element according to claim 8 , wherein a pattern center of at least one of the first microstructures is misalignment with a pattern center of the corresponding second microstructure.

10 . The light guide element according to claim 8 , wherein a pattern center of at least one of the first microstructures is alignment with a pattern center of the corresponding second microstructure.

11 . A lighting fixture including the light guide element according to claim 8 , and at least one light source disposed at at least one side of the light guide element to provide the light guide element with an incident light.

12 . A light guide element, including:
a light guide body including a first light-emitting surface and a second light-emitting surface opposite to and parallel to each other; a plurality of first microstructures, wherein the first microstructures are disposed on the first light-emitting surface; and a plurality of second microstructures respectively corresponding to the first microstructures, wherein the second microstructures are disposed on the second light-emitting surface; wherein each of the first microstructures laps over the corresponding second microstructure in part in a normal direction of the first light-emitting surface; and wherein the first microstructures and the second microstructures have the same pitch but different sizes.

13 . Thelight guide element according to claim 12 , wherein a pattern center of at least one of the first microstructures ismisalignment with a pattern center of the corresponding second microstructure.

14 . The light guide element according to claim 12 , wherein a pattern center of at least one of the first microstructures is alignment with a pattern center of the corresponding second microstructure.

15 . A lighting fixture including the light guide element according to claim 12 , and at least one light source disposed at at least one side of the light guide element to provide the light guide element with an incident light.

Assignees

• Radiant Opto Electronics Corp

Inventors

• Lin Wei-Chen
• Hsueh Hui-Ching

Classifications

• Y10T29/49002

  Electrical device making · CPC title

• G02B6/0036

  2-D arrangement of prisms, protrusions, indentations or roughened surfaces · CPC title

• G02B6/0043 Primary

  provided on the surface of the light guide · CPC title