Semiconductor light emitting diodes (LEDs) have been widely used for decorative lighting, especially on holidays. LED light strings are inexpensive, have superior physical properties, including low operating voltage and power, small size, long lifetime, and a high degree of stability. Further, LEDs do not operate at high temperatures and do not generate the heat of normal incandescent bulbs, and as such, provide a safer source of decorative lighting.
An embodiment of the present invention may therefore comprise a method of assembling a substantially inseparable LED lamp assembly from individual discrete components comprising: providing a lamp holder that is formed as an annulus with a first opening on a first end of the annulus and a second opening on a second end of the annulus; substantially permanently securing a lamp cover to the first end of the annulus so that the lamp cover is substantially inseparable from the lamp holder and forms a watertight seal with the lamp holder; providing an LED lamp having LED pin leads; attaching wires directly to the LED pin leads of the LED lamp that have a predetermined size and a predetermined shape; inserting the LED lamp through the second opening of the second end of the annulus to a position where the LED lamp is oriented to allow light from the LED lamp to be transmitted through the lamp cover; substantially permanently attaching the LED lamp directly to the annulus so that the LED lamp is substantially inseparable from the annulus; inserting a plug into the second opening of the second end of the annulus, the plug having indentations along an outer surface that substantially match the predetermined size and the predetermined shape of the wires so that the plug forms a watertight seal with the wires; substantially permanently sealing the plug in the second opening to form a watertight seal at the second end of the annulus.
An embodiment of the present invention may further comprise an LED lamp assembly that is constructed of individual components that are separately fabricated and are assembled to provide a substantially inseparable LED lamp assembly comprising: a lamp holder that is shaped as an annulus, the annulus having a first opening on a first end and a second opening on a second end; a lamp cover substantially permanently attached to the first end of the annulus so that the lamp cover is substantially inseparable from the lamp holder and a watertight seal is formed between the lamp cover and the lamp holder; an LED lamp inserted through the second opening of the annulus and substantially permanently attached in the annulus so that the LED lamp is substantially inseparable from the lamp holder and forms a watertight seal with the lamp holder in a position that orients the LED lamp to allow light to be transmitted through the lamp holder, the LED lamp having LED lead pins attached to the LED lamp; wires that are conductively connected directly to the LED lead pins and extend through the second opening of the second end of the annulus, the wires having a predetermined size and shape; a plug having indentations along an outer surface that substantially match the predetermined size and shape of the wires, the plug substantially permanently inserted in the second opening to prevent disassembly of the LED lamp assembly and to create a watertight seal between the plug and the second opening in the annulus.
Inseparable LED strings avoid many of the problems associated with LED strings made from separable LED lamps. Inseparable LED lamps are not subject to accidental disconnection, theft or vandalism, for the most part, because the LEDs are hardwired into the LED string and overmolded in injection molding machines. In other words, the LED lamps are soldered directly to the wires of the lighting string and are then overmolded in an injection molding machine. The disadvantage of this process is that it is expensive to individually overmold each LED lamp using injection molding devices and to perform the final assembly of the components at the injection molding machine site. Further, the high temperatures used in the injection molding process often damage the LED lamps, resulting in low yield. If a single LED lamp is damaged in a series wired LED light string during the injection molding process, the entire light string will be inoperable.
Various embodiments are disclosed herein that provide a substantially inseparable lamp that is fabricated from discrete parts that can be separately manufactured and later assembled in a substantially inseparable lamp assembly that overcomes many of the disadvantages of both separable and inseparable LED lamp assemblies. As used herein, the terms “substantially inseparable” means that the LED lamp assembly is not separable by hand using forces that can be manually generated, or without the use of special tools. Of course, everything is separable if sufficient force is applied. However, damage may result to the lamp assembly from the application of forces that exceed normal manual forces that can be generated by hand.
Referring again to
As also illustrated in
The LED lamp assembly 100 of
The advantage of the LED lamp assembly 100 illustrated in
As also shown in
Hence, the various embodiments disclosed herein allow for the assembly of discrete components that are individually manufactured. The assembly process avoids damage to LED diodes and electric wires that can occur during overmolding in injection molding devices. The various embodiments illustrate a substantially inseparable LED lamp assembly that is formed on an LED light string that is resistant to theft and vandalism. The disclosed embodiments reduce manufacturing costs related to the high cost of special injection molding devices that are needed to accommodate LED lamps and LED lamp strings and eliminates the necessity for assembly at the site of the injection molder.
The foregoing description of the invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed, and other modifications and variations may be possible in light of the above teachings. The embodiment was chosen and described in order to best explain the principles of the invention and its practical application to thereby enable others skilled in the art to best utilize the invention in various embodiments and various modifications as are suited to the particular use contemplated. It is intended that the appended claims be construed to include other alternative embodiments of the invention except insofar as limited by the prior art.
This application is a divisional application of U.S. patent application Ser. No. 11/957,294, entitled “Substantially Inseparable LED Lamp Assembly,” filed Dec. 14, 2007, by Jing Jing Yu, which application is a continuation-in-part of U.S. patent application Ser. No. 11/350,343, entitled “A New All-in-One LED Assembly, String Assembly and Method,” filed Feb. 9, 2006, by Jing Jing Yu. The entire contents of the above mentioned applications are hereby specifically incorporated herein by reference for all that they disclose and teach.
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Number | Date | Country | |
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Number | Date | Country | |
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Parent | 11957294 | Dec 2007 | US |
Child | 13311774 | US |
Number | Date | Country | |
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Parent | 11350343 | Feb 2006 | US |
Child | 11957294 | US |