# US 8,770,786 B2 · Illuminating device with light guiding frame

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- Number: US 8,770,786 B2
- Document ID: US8770786B2
- Status: Granted
- Kind: B2
- Application number: 13/795,161
- Filed: 2013-03-12
- Published: 2013-12-05
- Granted: 2014-07-08
- Earliest claimed: 2012-05-30
- Assignees: Lextar Electronics Corporation
- Applicants: Lextar Electronics Corporation
- Inventors: Sheng-Ping Chen; Shang-Jung Hsieh; Hou-Hsiang Su
- Web page: https://patentgrep.com/patent/US8770786B2

## CPC

- G02B 6/0001: {specially adapted for lighting devices or systems (lighting or signalling on vehicles using light guides B60Q1/00; lighting devices for vehicle dashboards B60Q3/10; lighting devices for vehicle interior using light guides B60Q3/62; lighting devices mounted on the vehicle rear part using light guides F21S43/235; measuring arrangements having light conducting pointers G01D13/265; illumination of liquid crystal displays G02F1/1336; illuminated signs G09F13/00)}
- F21V 7/0008: {providing for indirect lighting}
- F21V 7/04: Optical design
- F21S 2/005: {of modular construction}
- F21Y 2103/10: comprising a linear array of point-like light-generating elements
- F21Y 2115/10: Light-emitting diodes [LED]
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## Abstract

A light emitting device comprising a light guiding frame and a light source is provided. The light guiding frame has a recess, and an edge of an opening of the recess defines a light-emitting opening. The light guiding frame comprises a first light guiding structure and a second light guiding structure connected to the first light guiding structure. The light source is disposed on a bottom of the recess and has a light-emitting surface. The first light guiding structure is extended along a direction away from the light-emitting surface and the light-emitting opening. The second light guiding structure is extended along a direction away from the light-emitting surface but close to the opening.

## Claims

### Claim 1

A light emitting device, comprising:
a light guiding frame having a recess, wherein the recess has a light-emitting opening, and the light guiding frame comprises:
a first light guiding structure;
a second light guiding structure connected to the first light guiding structure; and
a light source disposed on a bottom of the recess and having a light-emitting surface;
wherein the first light guiding structure is extended from the light source along a direction away from the light-emitting surface and the light-emitting opening, and the second light guiding structure is extended from the first light guiding structure along a direction away from the light-emitting surface but close to the light-emitting opening; and
wherein the first light guiding structure comprises a plurality of light guiding sections, the n+1th light guiding section is farther away from the light-emitting surface of the light source than the nth light guiding section, the angle between the n+1th light guiding section and the light-emitting surface is smaller than the angle between the nth light guiding section and the light-emitting surface, and n is a positive integer.

### Claim 2 (depends on 1)

The light emitting device according to claim 1, wherein the angle between the last light guiding section and the light-emitting surface substantially is equal to 90 degrees.

### Claim 3 (depends on 1)

The light emitting device according to claim 1, wherein the second light guiding structure is a step-type light guiding structure.

### Claim 4 (depends on 1)

The light emitting device according to claim 1, wherein the second light guiding structure comprises a plurality of light guiding sections, the m+1th light guiding section is farther away from the light-emitting surface than the mth light guiding section, the angle between the m+1th light guiding section and the light-emitting surface is larger than or smaller than both the angle between the mth light guiding section and the light-emitting surface and the angle between the m+2th light guiding section and the light-emitting surface, and m is a positive integer.

### Claim 5 (depends on 1)

The light emitting device according to claim 1, further comprising:
a first diffuser, wherein the light source is disposed between the first diffuser and the light guiding frame.

### Claim 6 (depends on 5)

The light emitting device according to claim 5, further comprising:
a reflector disposed on the first diffuser and located between the light guiding frame and the first diffuser.

### Claim 7 (depends on 5)

The light emitting device according to claim 5, further comprising:
a heat sink, wherein one end of the heat sink is fixed on an inner surface of the bottom of the recess, the other end of the heat sink is connected to the first diffuser, and the light source is disposed on a lateral side of the heat sink.

### Claim 8 (depends on 1)

The light emitting device according to claim 1, further comprising:
a second diffuser covering the light-emitting opening.

### Claim 9 (depends on 1)

The light emitting device according to claim 1, wherein the angle between an optical axis of output light of the light source and a horizontal direction is between 0˜45 degrees.

### Claim 10 (depends on 1)

The light emitting device according to claim 1, wherein the light-emitting surface faces the first light guiding structure or the second light guiding structure.