# US 9,520,520 B2 · Focusing solar light guide module

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- Number: US 9,520,520 B2
- Document ID: US9520520B2
- Status: Granted
- Kind: B2
- Application number: 13/730,326
- Filed: 2012-12-28
- Published: 2013-06-27
- Granted: 2016-12-13
- Earliest claimed: 2010-12-30
- Assignees: Industrial Technology Research Institute
- Applicants: Industrial Technology Research Institute
- Inventors: Hui-Hsiung Lin; Chun-Ting Lin; Yu-Nan Pao; Chin-Ju Hsu; Jen-Hui Tsai
- Web page: https://patentgrep.com/patent/US9520520B2

## CPC

- H10F 77/67: including means to utilise heat energy directly associated with the photovoltaic cells, e.g. integrated Seebeck elements
- H10F 77/484: {Refractive light-concentrating means, e.g. lenses}
- H10F 77/488: {Reflecting light-concentrating means, e.g. parabolic mirrors or concentrators using total internal reflection}
- G02B 6/0038: {Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide}
- Y02E 10/52: PV systems with concentrators
- H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A focusing solar light guide module includes a lens array plate and a light guide plate. The lens array plate includes at least one lens. Each lens receiving and focusing a sunlight has an upper curved surface and a lower plane surface. The light guide plate has an upper plane surface parallel to the lower plane surface of the lens array plate and a lower microstructure surface. The lower microstructure surface includes at least one depressed area and at least one connection area parallel to the upper plane surface of the light guide plate. The connection area is connected between the adjacent depressed areas having a depressed point, a first inclined plane and a second inclined plane. The first inclined plane and the second inclined plane are respectively connected between the depressed point and the adjacent connection area.

## Claims

### Claim 1

A focusing solar light guide module, applied to guide sunlight to an energy conversion device, comprising:
a lens light guide plate, having a lens array and a plurality of microstructures,
wherein the lens array is integrally formed on a surface of the lens light guide plate and the microstructures are disposed on another opposite surface of the lens light guide plate,
the lens array comprises a plurality of lenses, each of the plurality of lenses has a curved surface, one of curved surfaces of the plurality of lenses is directly connected to adjacent curved surfaces so that the curved surfaces of the plurality of lenses are continuously arranged to form a curved exterior surface of the lens light guide plate, the lens array receives and focuses the sunlight, some of the sunlight traveling inside of the lens light guide plate is totally internally reflected by at least two lenses of the plurality of lenses after being reflected by the microstructures,
the microstructures comprise at least one depressed area and at least one connection area, the connection area is connected between the depressed areas, the depressed area comprises a depressed point, a first inclined plane and a second inclined plane, wherein the first inclined plane and the second inclined plane are respectively located on the different sides of the depressed point, the first inclined plane and the second inclined plane are respectively connected between the depressed point and the connection area adjacent to the depressed point,
after being focused by the lens light guide plate, the sunlight is reflected by the depressed area and then reflected by the connection area in sequence and is guided into the lens light guide plate by the total internal reflection, and the sunlight passes through at least one side surface of the lens light guide plate, and the energy conversion device disposed on or near the side surface of the lens light guide plate receives the sunlight passing through the lens light guide plate and converts the sunlight into an electric power.

### Claim 2 (depends on 1)

The focusing solar light guide module according to claim 1, wherein the curved exterior surface of the lens light guide plate is covered with a reflective layer.