# US 2014/0192540 A1 · Illuminating member for reducing unified glare rating and lighting device using the same

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- Number: US 2014/0192540 A1
- Document ID: US20140192540A1
- Status: Published application
- Kind: A1
- Application number: 14/239,496
- Filed: 2012-07-26
- Published: 2014-07-10
- Earliest claimed: 2011-08-17
- Assignees: LG Innotek Co., Ltd.
- Applicants: LG Innotek Co., Ltd.
- Inventors: Jun Phill Eom; Dong Mug Seong; Dong Hyun Lee; Beom Sun Hong; Yong In Lee
- Web page: https://patentgrep.com/patent/US20140192540A1

## CPC

- F21V 17/101: {permanently, e.g. welding, gluing or riveting}
- F21S 8/02: of recess-mounted type, e.g. downlighters (specially adapted for vehicle exteriors F21S41/00-F21S45/00)
- F21V 5/004: {using microlenses}
- F21V 5/008: {Combination of two or more successive refractors along an optical axis}
- F21V 15/01: Housings, e.g. material or assembling of housing parts (F21V15/02 takes precedence {housings forming signs or letters G09F13/04})
- F21Y 2105/10: comprising a two-dimensional [2D] array of point-like light-generating elements
- F21Y 2115/10: Light-emitting diodes [LED]
- G02B 3/0056: {arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses (G02B3/0043 takes precedence; miniaturised objectives for electronic devices employing wafer level optics G02B13/0085)}
- 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
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

Disclosed is a lighting device capable of reducing UGR (Unified Glare Rating). in a illuminating member, reflection efficiency of light significantly scattering to the left and right among light applied to the air gap through the diffusion plate is increased using the adhesion material pattern layer of periphery surrounding an air gap, and simultaneously, the UGR may be reduced by removing the process disposing the pattern with a specific structure and increasing the process efficiency.

## Claims

### Claim 1

An illuminating member, comprising:
a diffusion plate;
an optical plate over the diffusion plate; and
an adhesion layer and an air gap between the diffusion plate and the optical plate.

### Claim 2 (depends on 1)

The illuminating member of claim 1, wherein the adhesion layer is formed in the outside edge of the diffusion plate or the optical plate by pattern of integral structure or separate structure.

### Claim 3 (depends on 1)

The illuminating member of claim 1, wherein the adhesion layer is a number of rib pattern disposed on one side of the diffusion plate or the optical plate in the first direction or in the second direction orthogonal to the first direction.

### Claim 4 (depends on 1)

The illuminating member of claim 1, wherein the adhesion layer is evenly or unevenly disposed with at least one the separate pattern on one side of the diffusion plate or the optical plate.

### Claim 5 (depends on 1)

The illuminating member of claim 1, wherein the adhesion layer is disposed to the periphery of a spacer optical member bonded to one side of the diffusion plate or the optical plate.

### Claim 6 (depends on 1)

The illuminating member of claim 1, wherein the adhesion layer comprises an adhesive resin layer or a double-sided adhesive tape.

### Claim 7

A lighting device, comprising
a printed circuit board with a light source;
a frame portion formed around region at which the light source is disposed; and
an illuminating member, wherein the illumination member comprises a diffusion plate, an optical plate over the diffusion plate, and an adhesion layer and an air gap between the diffusion plate and the optical plate.

### Claim 8 (depends on 7)

The lighting device of claim 7, wherein the adhesion layer is formed in the outside edge of the diffusion plate or the optical plate by the pattern of integral structure or separate structure.

### Claim 9 (depends on 7)

The lighting device of claim 7, wherein the region formed with the adhesion layer is inserted into the inside of the frame portion.

### Claim 10 (depends on 7)

The lighting device of claim 7, wherein the adhesion layer is disposed with even or uneven pattern on one side of the diffusion plate or the optical plate or is disposed to the periphery of a spacer optical member bonded to one side of the diffusion plate or the optical plate.

### Claim 11 (depends on 10)

The lighting device of claim 10, wherein the adhesion layer is a number of rib pattern disposed on one side of the diffusion plate or the optical plate in the first direction or in the second direction orthogonal to the first direction.

### Claim 12

(canceled)

### Claim 13 (depends on 7)

The lighting device of claim 7, wherein the frame portion includes
a first frame accommodating the printed circuit board; and
a second frame separately combined with the first frame and disposing an insertion portion by forming a space portion in combining site, wherein the illuminating member is inserted in the inserting portion.

### Claim 14

(canceled)

### Claim 15 (depends on 7)

The lighting device of claim 7, wherein the frame portion includes
a first frame in which a printed circuit board is disposed on the inside surface of a base thereof
and a edge partition wall formed in the outside of the base.

### Claim 16 (depends on 15)

The lighting device of claim 15, wherein the frame portion further comprises a second frame,
wherein the second frame includes
an outside frame corresponding to the edge partition wall, in which a center portion thereof is opened, and
a guide frame bended in the center portion from the outside frame and forming the first frame and a space portion.

### Claim 17 (depends on 16)

The lighting device of claim 16, wherein the guide frame includes
a first guide portion jointed with top of the edge partition wall and one end of the guide frame; and
a second guide portion formed with step from the first guide portion and disposing the space portion to be spaced apart from the top of the edge partition wall, wherein one ends of the diffusion plate and the optical plate are inserted into the space portion.

### Claim 18 (depends on 7)

The lighting device of claim 7, wherein the optical plate includes a number of micro lens pattern, and a sag of the micro lens pattern is within the range of 0.1˜0.25 or 0.35˜0.5, the sag being a ratio of the height of the micro lens pattern to the diameter of the micro lens pattern.

### Claim 19 (depends on 7)

The lighting device of claim 7, wherein the optical plate includes a number of micro lens pattern, and a fill factor of the micro lens pattern is within the range of 0.5˜1.0, the fill factor being defined as the proportion of an area occupied by the micro lens pattern per an unit area of one surface of the optical plate.

### Claim 20 (depends on 19)

The lighting device of claim 19, wherein a sag of the micro lens pattern is within the range of 0.1˜0.5, the sag being a ratio of the height of the micro lens pattern to the diameter of the micro lens pattern.

### Claim 21

(canceled)

### Claim 22 (depends on 1)

The illuminating member of claim 1, further comprising an optical pattern condensing light on the optical plate.

### Claim 23 (depends on 7)

The lighting device of claim 7, wherein the illuminating member further comprises an optical pattern condensing light on the optical plate.