# US 2014/0152471 A1 · Snow-melting led traffic signal

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2014/0152471 A1
- Document ID: US20140152471A1
- Status: Published application
- Kind: A1
- Application number: 14/085,044
- Filed: 2013-11-20
- Published: 2014-06-05
- Earliest claimed: 2012-12-04
- Assignees: Hard Giken Kogyo Co., Ltd.; Shinichi Nakamura
- Applicants: Hard Giken Kogyo Co., Ltd.
- Inventors: Toshihiro SUZUKI; Michiaki IMAO
- Web page: https://patentgrep.com/patent/US20140152471A1

## CPC

- B61L 5/1827: {using light sources of different colours and a common optical system}
- F21V 5/045: {the lens having discontinuous faces, e.g. Fresnel lenses}
- F21V 29/90: Heating arrangements
- H01M 10/6561: Gases
- B61L 2207/02: using light-emitting diodes [LEDs]
- F21V 29/83: the elements having apertures, ducts or channels, e.g. heat radiation holes
- F21W 2111/02: for roads, paths or the like
- F21Y 2105/10: comprising a two-dimensional [2D] array of point-like light-generating elements
- F21Y 2115/10: Light-emitting diodes [LED]
- H05B 1/02: Automatic switching arrangements specially adapted to apparatus {; Control of heating devices} (thermally-actuated switches H01H37/00)
- Y02E 60/10: Energy storage using batteries
- B61L: GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC (brakes or auxiliary equipment B61H, B61K; point or crossing construction E01B)
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- 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
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

Provided is an LED traffic signal which can inhibit snow accretion, ice accretion, frost accretion, freeze of snow, freeze of ice, freeze of frost, and the like promptly without fail and which can obtain satisfactory visibility. The snow-melting LED signal includes: an LED signal light including in order: a lens cover; a heat generating sheet; an LED mask plate; an LED lens module; and a printed board protection cover; and a signal body for housing the LED signal light.

## Claims

### Claim 1

A snow-melting LED traffic signal, comprising:
an LED signal light, comprising in order:
a lens cover;
a heat generating sheet;
an LED mask plate;
an LED lens module; and
a printed board protection cover; and
a signal body for housing the LED signal light.

### Claim 2 (depends on 1)

The snow-melting LED traffic signal according to claim 1, wherein the heat generating sheet comprises a planar far infrared heat generating sheet laminated with a lamination film.

### Claim 3 (depends on 2)

The snow-melting LED traffic signal according to claim 2, wherein the planar far infrared heat generating sheet comprises a heating element that is formed by impregnating cloth with a nanocarbon paint and is laminated with an insulating sheet.

### Claim 4 (depends on 2)

The snow-melting LED traffic signal according to claim 2, wherein the planar far infrared heat generating sheet generates heat by being energized by an alternating-current power supply.

### Claim 5 (depends on 1)

The snow-melting LED traffic signal according to claim 1, further comprising a thermostat.

### Claim 6 (depends on 2)

The snow-melting LED traffic signal according to claim 2, wherein the planar far infrared heat generating sheet generates heat by being energized by an alternating-current power supply in synchronization with a lit state of a signal light within a temperature range set on a thermostat.

### Claim 7 (depends on 3)

The snow-melting LED traffic signal according to claim 3, wherein the planar far infrared heat generating sheet generates heat by being energized by an alternating-current power supply.

### Claim 8 (depends on 2)

The snow-melting LED traffic signal according to claim 2, further comprising a thermostat.

### Claim 9 (depends on 3)

The snow-melting LED traffic signal according to claim 3, further comprising a thermostat.

### Claim 10 (depends on 4)

The snow-melting LED traffic signal according to claim 4, further comprising a thermostat.

### Claim 11

(canceled)

### Claim 12 (depends on 6)

The snow-melting LED traffic signal according to claim 6, further comprising a thermostat.

### Claim 13 (depends on 7)

The snow-melting LED traffic signal according to claim 7, further comprising a thermostat.

### Claim 14 (depends on 3)

The snow-melting LED traffic signal according to claim 3, wherein the planar far infrared heat generating sheet generates heat by being energized by an alternating-current power supply in synchronization with a lit state of a signal light within a temperature range set on a thermostat.