GB2490316A

GB2490316A - LED light with circumferential structure.

Info

Publication number: GB2490316A
Application number: GB1106627.1A
Authority: GB
Inventors: Chien-Yuan Chen; Ying-Te Chuang
Original assignee: Power Digital Delight Co Ltd
Current assignee: Power Digital Delight Co Ltd
Priority date: 2011-04-20
Filing date: 2011-04-20
Publication date: 2012-10-31
Also published as: GB201106627D0

Abstract

A light device has one end formed from a connection and circuit assembly 10 with a circumferential surface with mounting slots 121, fig 2 to support heat dissipation frames 20 each of which has a number of light receptacles 24, 25, 26 at an inclined position to support LED light sources 30.

Description

TITLE: HIGH PERFORMANCE LIGHTING DEVICE WTTH

MULTI-LAYER LIGHT SOURCE STRUCTURE

(a) Technical Field of the Invention

The present invention generally relates to a high performance lighting device with multi-layer light source structure, and more particularly to a high performance lighting device featuring excellent heat dissipation, light weight, and wide and uniform illumination

(b) Description of the Prior Art

High power lighting device that are commonly used in street lamps, searchlights, decoration lighting, and advertisement lighting, suffers drawbacks in the operation thereof. Some of the drawbacks are briefly described as follows.

(1) Poor heat dissipation: One of the most commonly adopted lighting solutions, which is also considered the best one, is using light-emitting diodes (LEDs) as a high power light source, in such as way that the LEDs are distributed on a plane in a very dense manner in order to realize sufficient brightness. The high power LEDs that are densely arranged irradiates a great amount of heat. Heat dissipation fins are often provided at the back side of the densely arranged LEDs, but since the conventional lighting devices of this form are often housed in a totally closed enclosure, air ventilation is generally poor and this makes heat dissipation poor also. Poor heat dissipation is the most severe problem of the conventional high performance lighting devices.

(2) Narrow light irradiation and non-unifonn brightness: The high power LEDs that are densely distributed on a plane can project in a frontward direction, whereby for a street lamp using this arrangement, only the area exactly below the street lamp can be of intense brightness (due to densely overlapped inadiations), and circumferential areas do not have such intense brightness. This is another drawback of the conventional high performance lighting devices.

(3) Poor structure design and great weight: In order to obtain intense brightness, a street lamp must be provided with a high power light source, which requires bulky and thus heavy heat dissipation tins attached to the back side of the lighting device, making it a severe problem to be addressed.

Further, the lighting device comprises a heavy enclosure and a heavy glass cove; and thus the total weight is great. This is another drawback of the conventional high performance lighting device. Such an enclosed lighting device also encloses the heat dissipation fins inside the enclosure thereof or even combines the heat dissipation fins with the enclosure thereof This leads to increased weight and poor heat dissipation and. thus ftirther improvement is needed.

SUMMARY OF THE iNVENTION

A primary objective of the present invention is to provide a lighting device of which an overall configuration is formed as a hollow structure composed of a plurality of heat dissipation frames and a cover. Each of the heat dissipation frames forms, at arbitrary locations thereof (or a proportional manner), a plurality of illuminator receptacles. The illuminator receptacles are arranged at an inclined condition to face downward at a predetermined angle. The illuminator receptacles receive and retain therein illuminator assemblies, whereby thermal energy generated by the illuminator assemblies can be properly dissipated through the heat dissipation frames and the light emitting from each of the illuminator assemblies is projected to a predetemiined area of a given width through the specific angular positioning of each the illuminator receptacle. Thus, light illumination and brightness are made more uniform and weight is reduced.

Mother objective of the present invention is to provide a lighting device that comprises heat dissipation fins arranged behind the illuminator receptacles Of the heat dissipation frames to efficiently dissipate heat from the illuminator assemblies.

A further objective of the present invention is to provide a lighting device comprises a plurality of heat dissipation frames each having a surface coated with a heat dissipation layer to improve the heat dissipation performance.

Yet a further objective of the present invention is to provide a lighting device that comprises a shaped configuration formed of heat dissipation frames each foming a plurality of curved raised sections, each having an end fomiing an illuminator receptacle, whereby each illuminator assembly is not shielded or blocked by another illuminator assembly located in front thereof in a light projection direction and excessive inclination of the illuminator receptacles is eliminated, so that manufacturing is easy and outside configuration is more aesthetically appealing.

The foregoing objectives and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself; all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts.

Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a prefened structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG I is a perspective view showing a lighting device according to the present invention.

FIG 2 is an exploded view of the lighting device of the present invention.

FIG 3 is a cross-sectional view of the lighting device of the present invention in an assembled form.

FIG 4 is a perspective view of a heat dissipation frame of the lighting device according to the present invention.

FIG 5 is a side elevational view of the lighting device according to the present invention.

FIG 6 is an end view of the lighting device according to the present invention.

FIG 7 is another exploded view of the lighting device according to the present invention taken from a different perspective.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The following descriptions are exemplary embodiments only, and are not intended to limit the scope, applicability or configuration of the invention in any way. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. Various changes to the described embodiments may be made in the function and anangement of the elements described without departing from the scope of the invention as set forth in the appended claims.

Referring to FIGS. 1,2, and 7, the present invention mainly comprises the following components: A connection and circuit assembly (10) has an end forming a connection base (11) for selective connection with a power source and an opposite end forming a cover (12). The cover (12) has a circumferential surface forming a plurality of mounting slots (121). The connection base (11) and the cover (12) can be integrally formed together as a unitary stmcture, or alternatively, they are individually formed as two separate members, which are then coupled to each other by respectively forming a threaded hole (110) and a fastening hole (120), which receives a fastener (40) (such as a bolt or a rivet) to extend therethrough for coupling.

A plurality of heat dissipation frames (20) is cireumferentially distributed and respectively fixS to the mounting slots (121) of the connection and circuit assembly (10). As shown in FIGS. 2,4, and 7, each of the heat dissipation frames (20) forms a shaped configuration at any segment of the whole length thereof, and preferably, the heat dissipation frame (20) is formed of a curved configuration and is provided with a plurality of illuminator receptacles (24), (25), (26) at any location on the heat dissipation frames (20) (the receptacles being shown on an outer surface of the frame as an example for illustration).

The illuminator receptacles (24), (25), (26) of each frame are each arranged at an inclined condition to face downward at a predeternined angle; one of the illuminator receptacles (receptacle (26)) is set at a bottom end of the heat dissipation frame (20). In a preferred embodiment according to the present invention, the heat dissipation frame (20) is formed of a plurality of curved raised sections (21), (22), (23) along the whole length thereof;, and each of the curved raised sections (21), (22), (23) has an end forming one of the illuminator receptacles (24), (25), (26) behind which (multiple) heat dissipation fins (241), (251), (261) are formed. At least one side (or two sides) of each of the heat dissipation frames (20) forms a wire channel (29), which communicates the illuminator receptacles (24), (25), (26), for receiving and retaining therein electrical wires (or other electrical conductors) for establishing electrical connection. As shown in FIGS. 2,4, and 7, each of the heat dissipation frames (20) has an upper end portion (27) forming a coupling hole (270), which as shown in FIGS. 2,3, and 5, is positionable in the respective mounting slot (121) of the connection and circuit assembly (10) to receive a fastener (40) to extend therethrough for securing. As shown in FIGS. 1,3, and 6, each of the heat dissipation frames (20) has a lower end (28) is preferably converging to further couple a support disk (not shown). The lower end (28) can be of a converging configuration or slightly diverges, but showing the same functionality.

The heat dissipation frames (20) shown in FIGS. I and 2 may be coated with a heat dissipation layer on a surface thereof to improve heat dissipation perfomiance. However, the heat dissipation coating is not a novel part of the present invention and further discussion is omitted here.

Referring to FIGS. 2, 3, and 7, a plurality of illuminator assemblies (30) is received and retained in the illuminator receptacles (24), (25), (26) of the heat dissipation frames (20). Each of the illuminator assemblies (30) comprises a housing, a lens, an LED (chip), and a circuit board (all not labeled in the drawings).

In the use of the present invention, as shown in FIGS. 1,3, and 5, since the cover (12) and the heat dissipation frames (20) of the connection and circuit assembly (10) collectively form a grating like structure, which may serve as a primary heat dissipation structure, whereby the heat dissipation frames (20) provide a sufficient ventilation and heat dissipation space, which ensures improved heat dissipation performance as compared to the S conventional structures.

Furthei, since the light emitting from each illuminator assembly (30) of the present invention is projected to a predetermined area of a given width through the specific angular positioning of each of the illuminator receptacles (24), (25), (26), the light radiation or light beam from each of the illuminator assemblies (30) can be projected to the ground at a selected angle to thereby provide an increased area of overall illumination. This overcomes the problem of overlapped illumination of the conventional LED lighting device.

Comparison between the lighting device of the present invention and the conventional ones indicates clearly that the lighting device of the present invention is better in power conservation and uniformity of light illumination and brightness, whereby the lighting device of the present invention can provide the same brightness with reduced number of LEDs used.

Further, in practical applications, the present invention eliminates the heavy enclosure and glass cover of the conventional lighting device (such as a street lamp) and this makes the lighting device lighter in weight it will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods diffethg from the type described above.

While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the spirit of the present invention,

Claims

I CLAIM: I. A high performance lighting device, comprising: a connection and circuit assembly, which has an end forming a connection base and an opposite end fomiing a cover; a plurality of heat dissipation frames, each of which has an upper end portion circuniferentially arranged and attached to a circumference of the connection and circuit assembly, each of the heat dissipation frames fomfing a plurality of illuminator receptacles, each of which is arranged at an inclined condition to face downward at a predetermined angle; and a plurality of illuminator assemblies, which are received and retained in the illuminator receptacles of the heat dissipation frames.
2. The high performance lighting device according to claim 1, wherein the heat dissipation frames comprises a curved configuration.
3. The high performance lighting device according to claim 1, wherein each of the heat dissipation frames is formed of a plurality of curved raised sections, each of which has an end forming each of the illuminator receptacles.
4. The high performance lighting device according to claim 1, wherein the heat dissipation frames have lower ends that converge inward or diverge outward.
5. The high. perfonriance lighting device according to claim 1, wherein the heat dissipation frames further comprises heat dissipation fins arranged behind the illuminator receptacles.
6. The high perfomianbe lighting device according to claim I, wherein the heat dissipation frames have the lower ends that are coupled to a support disk.
7. The high performance lighting device according to claim 1, wherein each of the heat dissipation frames has an end and one of the illuminator receptacles is set on the end.
8. The high performance lighting device according to claim 1, wherein each of the heat dissipation frames has at least one side forming a wire channel, which communicates the illuminator receptacles of the heat dissipation frame.
9. The high performance lighting device according to claim 1, wherein each of the heat dissipation frames has a surface coated with a heat dissipation layer.*
10. The high performance lighting device according to claim 1, wherein each of the illuminator assemblies comprises a housing, a lens, a light-emitting diode (chip), and a circuit board.