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Researchers Submit Patent Application, "Lighting Device for Vehicle, Radiating Device and Lighting Device", for Approval

August 28, 2014



By a News Reporter-Staff News Editor at Politics & Government Week -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventors KIM, Ji Hoon (Seoul, KR); KIM, Sung Min (Seoul, KR), filed on February 4, 2014, was made available online on August 14, 2014.

The patent's assignee is Lg Innotek Co., Ltd.

News editors obtained the following quote from the background information supplied by the inventors: "Embodiments of the present invention relate to a radiating device, a lighting device including the same, and a lighting device for a vehicle.

"A light emitting diode (LED) device is directed to converting an electrical signal to infrared rays or light using the properties of a compound semiconductor. Unlike a fluorescent lamp, the LED device does not use any harmful substances such as mercury, which results in less environment contamination, and has an advantage that its life span is longer as compared to a conventional light source. The LED device also consumes low electric power as compared to a conventional light source, and shows excellent visibility and low glariness thanks to a high color temperature. Thus, the LED device has been widely used as a light source of a head lamp for a vehicle.

"However, a head lamp for a vehicle shows a basic environmental temperature of approximately about 80.degree. C. due to the heat of an engine, and is vulnerable to the radiation of heat because it is sealed, so an increase in its internal temperature has an influence on the LED's life span. Accordingly, a radiating system with high performance capable of effectively emitting heat generated from the LED is needed, so a fan for emitting the heat generated from the LED is adopted.

"FIG. 1 is a view showing a conventional radiant heat structure for a vehicle headlamp.

"As illustrated in FIG. 1, the conventional radiant heat structure for the vehicle headlamp includes: an LED module 20 formed in an inner side of a housing of the head lamp; a heat sink 30 formed at a bottom surface of the LED module 20; and a cooling fan 40 installed at a lower part of the heat sink 30.

"That is, the conventional radiant heat structure for the vehicle head lamp enables the heat generated from the LED module to be emitted to the outside through the heat sink 30 formed at the bottom surface of the LED module 20, and has improved radiant heat efficiency by cooling the heat sink 30 with the cooling pan 40.

"However, as illustrated in FIG. 1, the conventional radiating structure for the vehicle headlamp is problematic in that a cost and a weight of the vehicle are increased and space utilization is reduced because the separate cooling fan 40 is mounted, and a cooling property is reduced because hot windy is generated in a case where the cooling fan 40 is used for long hours.

"Furthermore, the lifespan of the cooling fan as well as the lifespan of the LED may become a problem, and there is also a problem that a separate electric motor is applied to the LED headlamp which pursues for low power.

"Moreover, unlike a high intensity discharge (HID) or a halogen light source, the LED hardly generates infrared rays or ultraviolet rays, so it is also problematic that freezing of the headlamp is caused due to the snow and the like."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventors' summary information for this patent application: "An aspect of embodiments of the present invention provides a radiating device and a lighting device that can reduce a production cost and a weight and can improve efficiency of space utilization by forming a second radiating module composed of different thermal conductive materials and removing a fan, and can also realize the effects of an optical member such as snow melting, defrosting, demisting and defogging by radiating heat to a light emitting space.

"An aspect of embodiments of the present invention also provides a radiating device and a lighting device that can increase a radiant heat property by integrally forming a first radiating module and a second radiating module through insert injection molding.

"According to an aspect of embodiments of the present invention, there is provided a radiating device, including: a first radiating module configured to receive heat generated from a light source module; and a second radiating module including a first member extending to the first heat dissipation module and transmitting the received heat, and a second member configured to form a light emitting space and to radiate the heat transmitted from the first member to the light emitting space.

BRIEF DESCRIPTION OF THE DRAWINGS

"The accompanying drawings are included to provide a further understanding of the present invention, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present invention and, together with the description, serve to explain principles of the present invention. In the drawings:

"FIG. 1 is a view showing a conventional radiant heat structure for a vehicle headlamp;

"FIG. 2 through FIG. 4 illustrate various embodiments for a structure of a lighting device including a radiating device according to an embodiment of the present invention;

"FIG. 5 illustrates experimental results for radiant heat performance of a conventional lighting device for a vehicle and a lighting device for a vehicle according to another embodiment of the present invention;

"FIG. 6 illustrates transmission simulation results for each outer lens of a lighting device for a vehicle to which a bezel made of a general plastic material is applied and a lighting device for a vehicle according to still another embodiment of the present invention to which a thermal conductive resin is applied; and

"FIG. 7 illustrates experimental results for thermal resistance of a radiating device having no surface treatment layer, and a radiating device having a surface treatment layer according to still further another embodiment of the present invention."

For additional information on this patent application, see: KIM, Ji Hoon; KIM, Sung Min. Lighting Device for Vehicle, Radiating Device and Lighting Device. Filed February 4, 2014 and posted August 14, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=4676&p=94&f=G&l=50&d=PG01&S1=20140807.PD.&OS=PD/20140807&RS=PD/20140807

Keywords for this news article include: Lg Innotek Co. Ltd.

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Source: Politics & Government Week


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