Indoor SMD LED equipped for outdoor usage
Inactive Publication Date: 2016-05-12
LIGHTHOUSE TECH +1
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- Description
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- Application Information
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Benefits of technology
The patent describes an outdoor LED display that is protected by a vacuum-forming or cover molding covering that is placed over the LEDs on a printed circuit board. This covering is held in place by evacuating the space between the covering and the LEDs on the circuit board. The technical effect is that this allows the LED display to operate outdoors safely and securely.
Problems solved by technology
In order to withstand the environmental factors that can impair or damage the operation of such an outdoor device, outdoor SMD LEDs typically are designed with heavier and stronger components than an indoor SMD LED, which makes outdoor SMD LEDs more expensive.
A disadvantage of this approach is that many crack or other opening in such a cover comprises the integrity of the entire device, by allowing water, for example, to reach the interior of the covering, and it is difficult to ensure that such cracks or openings will not develop in the covering much earlier than the expected usage life of the product.
Moreover, in view of the complete seal that is needed, heat that develops during usage of the SMD LED is difficult to release, and the continued use of the SMD LED in such an elevated temperature environment shortens the life of the SMD LED.
Method used
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[0023]In accordance with the invention, an SMD LED is encapsulated by a vacuum-forming and / or cover molding sheet that is held in place by evacuation over the printed circuit board (PCB) to which the LED is mounted. In the example shown in FIG. 1, the device, in this case is an LED display 1, is shown before being covered by the vacuum-forming and / or cover molding sheet. The device shown in FIG. 1 is designed as an indoor device, meaning that, by itself, it would not be capable of outdoor use because it is not capable of withstanding an outdoor environment. The LED display 1 has multiple LEDs 3 on a PCB 2.
[0024]The sheet can be made of plastic, such as polycarbonate plastic, silicon, or the like. The sheet can be transparent or translucent, can be in one or more colors, and / or can be embossed with one or more patterns that can help direct light. The sheet can have at least one anti-ultraviolet layer.
[0025]The sheet can be a vacuum-forming sheet, a cover molding sheet, or a vacuum-fo...
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Abstract
An SMD LED that is designed for indoor use is equipped for outdoor use by encapsulation in a vacuum-forming and / or cover molding covering, which is placed over the indoor SMD LED and is formed thereon by evacuation. The thus-equipped indoor SMD LED is thereby usable in the same manner as a more expensive and ruggedly designed outdoor SMD LED.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This utility application claims priority to and the benefit of U.S. Patent Application No. 62 / 077,044, filed Nov. 7, 2014, which is hereby incorporated by reference.TECHNICAL FIELD OF THE INVENTION[0002]The present invention relates to SMD (Surface Mount Device) LED (Light Emitting Diode) of the type originally designed for indoor usage, but specially equipped for outdoor usage.BACKGROUND OF THE INVENTION[0003]As is well known, a light emitting diode (LED) is a solid-state semiconductor component that, when supplied with an appropriate electric current, emits light. LEDs are well known to have a high efficiency and a long life, which has resulted in an increasingly large number of applications for LEDs wherein traditional incandescent bulbs were previously used.[0004]SMD LEDs are composed of a large number of individual LEDs that are mounted on the surface of a circuit board. The circuit board is typically a printed circuit board, which i...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F21V3/04B29C70/78F21V15/00
CPCF21V3/0436F21V15/00B29C70/78F21Y2101/02B29K2105/20F21W2131/10B29K2083/00B29L2031/3481F21Y2105/001G09F9/33H01L33/52H01L33/56G06K7/10356G06K19/0707
Inventor CHAN, KUI LAI CURIE
Owner LIGHTHOUSE TECH