KR20040066762A - Led lamp using power supply - Google Patents
Led lamp using power supply Download PDFInfo
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- KR20040066762A KR20040066762A KR1020040051329A KR20040051329A KR20040066762A KR 20040066762 A KR20040066762 A KR 20040066762A KR 1020040051329 A KR1020040051329 A KR 1020040051329A KR 20040051329 A KR20040051329 A KR 20040051329A KR 20040066762 A KR20040066762 A KR 20040066762A
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- power supply
- led
- leds
- bulb
- socket
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/61—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using light guides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
- F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
- F21K9/238—Arrangement or mounting of circuit elements integrated in the light source
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/62—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using mixing chambers, e.g. housings with reflective walls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/0083—Array of reflectors for a cluster of light sources, e.g. arrangement of multiple light sources in one plane
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
- G02B6/0073—Light emitting diode [LED]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- 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
- F21Y2105/00—Planar light sources
- F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Led Device Packages (AREA)
Abstract
Description
본 발명은 전원장치를 이용한 엘이디 전구에 관한 것으로, 특히 기존의 전구소켓에 삽입할 수 있으면서, 안정된 전원을 공급할 수 있는 전원장치를 구비한 다 방향으로 빛을 조명할 수 있는 엘이디 전구에 관한 것이다.The present invention relates to an LED light bulb using a power supply device, and more particularly to an LED light bulb capable of illuminating light in multiple directions with a power supply device which can be inserted into an existing light bulb socket and can supply stable power.
일반적으로, 실내를 조명하는 등에 이용되는 전구는, 전류를 흘려 고온으로 가열함으로써 발생되는 빛을 이용한 필라멘트 전구가 주류이다.In general, a light bulb used for illuminating a room is a mainstream filament light bulb using light generated by flowing a current to a high temperature.
상술한 바와 같은 기존의 필라멘트 전구는, 빛이 발생할 정도의 고온으로 가열되기 때문에, 전력소비가 많으며, 수명도 짧다는 문제점이 있다.The conventional filament bulb as described above has a problem in that it consumes a lot of power and has a short life since it is heated to a high temperature at which light is generated.
이에 반해, 엘이디(LED: Light emitting diode)는 주입된 전자와 전공이 재결합할 때, 과잉 에너지를 빛으로 방출하는 다이오드로서, GaAsP 등을 이용한 적색발광과 GaP 등을 이용한 녹색발광 등이 있는데, 이러한 엘이디는 저전압 및 소전력이란 장점을 갖고 있다.On the contrary, LEDs (Light emitting diodes) are diodes that emit excess energy as light when the injected electrons and the electrons recombine, and include red light emission using GaAsP and green light emission using GaP. LED has the advantages of low voltage and low power.
그러나, 이러한 LED의 여러가지 장점에도 불구하고, 소켓형 또는 백열전구형 전구에 대한 개발이 미흡하고, 특히 가정용이나 일반 전원(110V, 220V)을 직접 받아 전원으로 사용하는 LED를 이용한 소켓 타입의 전구용 전원장치에 대해서는 전혀 개발되고 있지 않고 있다.However, despite the various advantages of such LED, the development of socket-type or incandescent bulb-type bulbs are insufficient, and in particular, the socket-type bulb power supply device using LEDs that directly receive home or general power sources (110V, 220V) and use them as power sources. It is not developed at all.
다만, 다양한 시도가 이루어지고 있으나, 전원 문제가 해결되지 않아 단순 개발단계에만 머물고 있는 실정이다.However, various attempts have been made, but the power supply problem is not solved, so it remains in the simple development stage.
이를 해결하기 위해 기존에는, 교류의 입력전압을 인가받아 변압기를 통해 의도하는 전압까지 강압시킨 후, 다시 다이오드나 브릿지회로를 통해 양(+)의 전압만을 통과시킨 후 콘덴서나 각종 안정화장치를 만들어 출력을 목표로 하는 직류전압을 만들어 냈다.In order to solve this problem, in the past, the input voltage of AC is applied and stepped down to the intended voltage through a transformer, and then only a positive voltage is passed through a diode or a bridge circuit. The DC voltage aimed at was created.
따라서, 상기와 같은 종래의 방식은, 변압기나 각종 안정화 부품이 차지하는 용적, 전류용량에 따른 부품의 크기 등에 제약이 있을 수 밖에 없다. 이러한 장치로서는, 교류-직류 변환기, 스위칭모드 전원장치, 일반적인 전원장치 등이 있다.Therefore, the conventional method as described above has limitations such as the volume occupied by the transformer or various stabilizing components, the size of the components according to the current capacity, and the like. Such devices include AC-DC converters, switched mode power supplies, general power supplies, and the like.
또한, 변압기를 사용하지 않는 무변압기 전원장치의 회로를 사용하고 있지만, 전류의 리플, 부하의 변동에 대한 급격한 전류변화, 전압변화 등에 대한 대책이 미흡하여 일부 실험용 전원으로만 사용하고 있을 뿐, 일반 전구용 소켓 베이스에 수용할 만큼의 용량, 안전성, 크기 등이 확보되고 있지 않다.In addition, the circuit of the transformerless power supply unit without a transformer is used, but the countermeasures against the ripple of current, the sudden current change in response to the load change, the voltage change, etc. are insufficient. The capacity, safety, size, etc. to accommodate the socket base for the bulb are not secured.
특히, 교류전원 소켓 베이스에 직접 연결하고 기존의 전구나 삼파장 램프 등에서 사용할 수 있을 만큼, 소켓 베이스 내부에 모두 삽입되면서 충분한 전력공급이 가능하고, 부하 변동에 따른 안전대책이 세워진 LED 전구용 전원장치에 대해서는 전혀 적용된 바 없다. 더욱이, LED를 발광시키기 위한 충분한 전력을 공급할 수 있으면서 소형의 LED 전구에 충분히 들어갈 수 있는 전원장치를 만드는 것은 극히 곤란하다.In particular, the power supply for LED bulbs, which are directly connected to the AC power socket base and can be used in existing light bulbs or three-wavelength lamps, can be supplied with sufficient power while being fully inserted into the socket base, and safety measures against load fluctuations have been established. None applied at all. Moreover, it is extremely difficult to make a power supply capable of supplying enough power to emit LEDs and enough to fit into a small LED bulb.
본 발명은 상기와 같은 문제를 해결하기 위해 발명된 것으로, 소형이면서 다양한 부하의 변동에도 안정한 동작을 수행하고, 부하의 변동에 따른 갑작스런 전류나 전압, 열의 충격을 흡수하여 안전한 동작을 수행함과 더불어, 소켓 전구의 용적에 충분히 들어갈 수 있는 초소형 전원장치를 갖춘 엘이디 전구를 제공하는 것에 그 목적이 있다.The present invention has been invented to solve the above problems, small size and stable operation to the fluctuation of various loads, and absorbs a sudden current, voltage, heat shock caused by the load variation, and performs a safe operation, Its purpose is to provide an LED bulb with a compact power supply that can fit into the volume of a socket bulb.
또한, 기존의 전구 소켓에 삽입할 수 있으면서, 다방향으로 빛을 조명할 수있는 엘이디 전구를 제공하는 것에 그 목적이 있다.It is also an object of the present invention to provide an LED bulb that can be inserted into an existing bulb socket and can illuminate light in multiple directions.
도 1은 본 발명에 따른 전원장치를 이용한 엘이디 전구의 회로도,1 is a circuit diagram of an LED bulb using a power supply according to the invention,
도 2는 본 발명에 따른 기존의 소켓에 삽입할 수 있으면서 전원장치를 갖춘 엘이디 전구를 나타낸 정면도,Figure 2 is a front view showing the LED bulb with a power supply can be inserted into the existing socket according to the present invention,
도 3은 도 2의 LED를 다방향으로 구부린 상태를 나타낸 사시도,3 is a perspective view illustrating a state in which the LED of FIG. 2 is bent in multiple directions;
도 4는 본 발명에 따른 기존의 소켓에 삽입할 수 있으면서 반사캡을 갖춘 엘이디 전구의 다른 실시예를 나타낸 도면이다.Figure 4 is a view showing another embodiment of the LED bulb with a reflective cap while being inserted into the existing socket according to the present invention.
〈도면의 주요부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>
1 --- 소켓 베이스, 2 --- 기판, 3 --- 반사캡,1 --- socket base, 2 --- board, 3 --- reflective cap,
4 --- 유연한 튜브, 5 --- LED, 6 --- 전구 본체,4 --- flexible tube, 5 --- LED, 6 --- bulb body,
C1,C2 --- 콘덴서, D1 ---브릿지 다이오드,C1, C2 --- condenser, D1 --- bridge diode,
D8 --- 제너다이오드, D2∼D7,D9∼D20 --- LED,D8 --- Zener Diode, D2-D7, D9-D20 --- LED,
R1,R2 --- 저항.R1, R2 --- resistance.
상기한 과제를 이루기 위한 본 발명은, 안정된 전원을 공급할 수 있는 전원장치를 구비한 다방향으로 빛을 조명할 수 있는 엘이디 전구에 있어서, 기존의 전구 소켓에 삽입할 수 있으면서, 소켓에 삽입되어 전원이 공급되면 다수개의 LED를 발광하게 하는 소켓 베이스와, 상부에는 다수개의 LED가 설치되고,하부에는 전원장치가 설치된 기판, 기판 상부에 설치된 각각의 LED가 다방향으로 자유자재로 유연하게 구부려질 수 있도록 각각의 LED 리드에 씌워진 유연한 튜브 및, 다수개의 LED 와 전원장치가 설치된 상기 기판을 실장하고, 상기 소켓 베이스 내에 삽입부착된 전구 본체를 구비하여 구성된 것을 특징으로 한다.The present invention for achieving the above object, in the LED bulb which can illuminate light in a multi-direction provided with a power supply device capable of supplying a stable power, can be inserted into the existing bulb socket, while being inserted into the socket When this is supplied, a socket base for emitting a plurality of LEDs, a plurality of LEDs are installed at the upper part, a substrate having a power supply at the lower part, and each LED installed at the upper part of the board can be flexibly flexibly freely in multiple directions. It is characterized in that it is configured to include a flexible tube which is covered on each LED lead, and a plurality of LEDs and the substrate on which the power supply is installed, and a light bulb body inserted into the socket base.
따라서, 상기와 같이 구성된 본 발명에 의하면, 크기에 상관없이 LED 전구를 기존의 소켓에 삽입할 수 있으면서, 다방향으로 빛을 조명할 수 있다.Therefore, according to the present invention configured as described above, the LED bulb can be inserted into the existing socket, regardless of the size, it is possible to illuminate the light in multiple directions.
(실시예)(Example)
이하, 도면을 참조하면서 본 발명의 실시예를 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
도 1은, 본 발명에 따른 전원장치를 이용한 엘이디 전구의 회로도를 나타낸 것으로, 그 구성은 콘덴서(C1, C2), 브릿지 다이오드(D1), 제너다이오드(D8), LED(D2∼D7, D9-D20), 저항(R1, R2, R3)으로 이루어진다.1 shows a circuit diagram of an LED bulb using a power supply device according to the present invention, the configuration of which is a capacitor (C1, C2), bridge diode (D1), zener diode (D8), LED (D2 to D7, D9-) D20) and resistors R1, R2, and R3.
도 1에 도시한 바와 같이, 인가되는 교류의 220V 전원전압은 저항(R1)을 거쳐 저항(R1)과 직렬 연결된 평활회로로 보내진다.As shown in Fig. 1, the 220V power supply voltage of the applied AC is sent to the smoothing circuit connected in series with the resistor R1 via the resistor R1.
상기 평활회로는 저항(R2)과 콘덴서(C1)가 병렬로 연결되어 이루어지고, 이저항(R2)과 콘덴서(C1)를 거쳐 전류가 상당부분 상쇄된다.The smoothing circuit is formed by connecting a resistor (R2) and a capacitor (C1) in parallel, and the current is substantially canceled through the resistor (R2) and a capacitor (C1).
상기 평활회로를 거쳐 상당부분 상쇄된 전류는 정류기인 브릿지 다이오드 (D1)를 거쳐 교류를 직류로 정류시킨다. 상기 평활회로와 브릿지 다이오드는 직렬로 연결된다.The current substantially canceled out through the smoothing circuit rectifies the alternating current into the direct current via the bridge diode D1, which is a rectifier. The smoothing circuit and the bridge diode are connected in series.
브릿지 다이오드(D1)에서 직류로 정류된 전류는, 제너다이오드(D8)에 의해 DC 48V로 정전압을 유지하고, 직류를 안정화시키는 전해콘덴서(C2)로 전압을 평활하게 한다. 한편, LED의 수에 따라 제너다이오드의 수가 적절하게 바뀔 수 있다.The current rectified by the direct current from the bridge diode D1 maintains a constant voltage at 48 V by the zener diode D8 and smoothes the voltage with the electrolytic capacitor C2 which stabilizes the direct current. On the other hand, the number of zener diodes can be changed according to the number of LEDs.
마지막으로, DC 48V가 전원전압으로 결정되면, 전원전압은 저항(R3)을 거쳐 직렬로 연결된 LED(D2∼D7, D9∼D20)로 인가되고, 이들 LED(D2∼D7, D9∼D20)를 발광시킨다.Finally, when DC 48V is determined as the power supply voltage, the power supply voltage is applied to the LEDs D2 to D7 and D9 to D20 connected in series via the resistor R3, and these LEDs D2 to D7 and D9 to D20 are applied. It emits light.
한편, LED는 색상에 따라 동작전압이 다르기 때문에, LED의 숫자가 다소 차이가 있을 수 있다.On the other hand, since the operating voltage is different depending on the color of the LED, the number of LED may be slightly different.
예컨대, 적색, 황색 LED는 1.8V정도에서 동작하고, 청색 LED는 3V정도에서 동작한다.For example, the red and yellow LEDs operate at about 1.8V and the blue LEDs operate at about 3V.
그리고, AC가 인가되면, 상술한 바와 같이 100mA 이하의 소비전류로 동작하는 회로에 사용되는 회로를 사용하게 된다.When AC is applied, a circuit used for a circuit operating with a current consumption of 100 mA or less as described above is used.
상술한 바와 같이, AC 220V가 인가될 경우에는, 14개의 LED를 연결하면 소비전류는 30mA정도 밖에 흐르지 않는다.As described above, when AC 220V is applied, when 14 LEDs are connected, the current consumption flows only about 30 mA.
도 2는, 본 발명에 따른 기존의 소켓에 삽입할 수 있으면서 전원장치를 갖춘 엘이디 전구를 나타낸 도면으로, 그 구성은 소켓 베이스(1), 기판(2), 유연한튜브(4), LED(5), 전구 본체(6)로 이루어진다.Figure 2 is a view showing the LED bulb with a power supply can be inserted into the existing socket according to the present invention, the configuration is a socket base (1), the substrate (2), flexible tube (4), LED (5) ) And the bulb body 6.
도 2에 도시한 바와 같이, 소켓 베이스(1)는 통상적인 형상을 가지며, 소켓(도시하지 않음)에 삽입되어 전원이 공급되면 LED(5)를 발광하게 된다.As shown in FIG. 2, the socket base 1 has a conventional shape and is inserted into a socket (not shown) to emit the LED 5 when power is supplied.
또한, 기판(2)의 상부(외부로 들어난)에는 다수개의 LED(5)가 설치되고, 하부(전구 본체(6) 내에 봉입된)에는 상술한 전원장치(도시하지 않음)가 설치되어 있다.In addition, a plurality of LEDs 5 are provided in the upper portion (entered outside) of the substrate 2, and the above-described power supply device (not shown) is provided in the lower portion (enclosed in the bulb body 6). .
또한, 기판(2) 상부에 설치된 다수개의 LED(5)에는, LED(5)가 자유자재로 유연하게 구부려질 수 있도록 각각의 LED리드(다리)에 유연한 튜브(4)가 씌워져 있다.In addition, a plurality of LEDs 5 provided on the substrate 2 are covered with flexible tubes 4 on the respective LED leads (legs) so that the LEDs 5 can be flexibly flexed freely.
상기와 같이, LED의 리드에 유연한 튜브(4)를 씌움으로써, LED(5)를 여러방향(도 3에 도시한 바와 같이)으로 향하게 할 수 있어, 빛을 원하는 방향으로 조명할 수 있어 편리하다.As described above, by covering the flexible tube 4 on the lead of the LED, the LED 5 can be directed in various directions (as shown in Fig. 3), so that the light can be illuminated in a desired direction, which is convenient. .
도 4는, 본 발명에 따른 기존의 소켓에 삽입할 수 있으면서 반사캡을 갖춘 엘이디 전구의 다른 실시예를 나타낸 것으로, 그 구성에 있어서 도 2와 거의 동일하지만, 반사캡(3)에 의해 전원장치와, 기판(2) 및 LED(5)를 모두 감싸는 형태로 이루어진 것이 다른 점이다. 물론, 도 2의 엘이디 전구와 그 작용·효과는 거의 동일하다.Figure 4 shows another embodiment of the LED bulb with a reflective cap while being inserted into the existing socket according to the present invention, the configuration is almost the same as in Figure 2, but the power supply device by the reflective cap (3) And, the substrate 2 and the LED (5) is formed in a form that wraps all the difference is different. Of course, the LED bulb of Fig. 2 and its action and effect are almost the same.
비록, 본 발명을 상술한 실시예로 한정하여 기술했지만, 본 발명의 목적 및 배경을 이탈하지 않는 범위 내에서 다양하게 변형하여 실시할 수 있는 것은 물론이다.Although the present invention has been limited to the above-described embodiments, it will be understood that various modifications can be made without departing from the object and the background of the present invention.
이상 기술한 바와 같이 본 발명에 의하면, 기존의 전구에 비해 발광효율이 높고, 소비전력이 적으며, 소형 및 경량으로 오랜 수명에 의한 유지관리비를 감소시킬 수 있다.As described above, according to the present invention, it is possible to reduce the maintenance cost due to long life due to high luminous efficiency, low power consumption, small size and light weight compared to the existing light bulb.
또한, 기존의 전구 소켓에 삽입할 수 있으면서, 자신이 원하는 다방향으로 빛을 조명할 수 있다.In addition, while being able to insert into the existing light bulb socket, it is possible to illuminate the light in the multi-direction desired.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040051329A KR100621188B1 (en) | 2004-07-01 | 2004-07-01 | LED Bulb Using Power Supply |
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| KR1020040051329A KR100621188B1 (en) | 2004-07-01 | 2004-07-01 | LED Bulb Using Power Supply |
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| Application Number | Title | Priority Date | Filing Date |
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| KR20-2003-0020992U Division KR200331747Y1 (en) | 2003-07-01 | 2003-07-01 | Light emitting diodes lamp using power supply |
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| Publication Number | Publication Date |
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| KR20040066762A true KR20040066762A (en) | 2004-07-27 |
| KR100621188B1 KR100621188B1 (en) | 2006-09-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8727574B2 (en) | 2010-09-21 | 2014-05-20 | Federal-Mogul Corporation | LED light module with light pipe and reflectors |
| US9642045B2 (en) | 2011-01-10 | 2017-05-02 | Huawei Technologies Co., Ltd. | Method and device for releasing context-related resource of user equipment |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101161362B1 (en) * | 2009-09-04 | 2012-06-29 | (주)나노튠 | Safely radiating light emitting diode lighting circuit |
| KR101042090B1 (en) | 2009-10-01 | 2011-06-16 | 박이현 | Alternative current light emitting diode circuit having constant current protecting circuit |
| KR101162512B1 (en) * | 2011-11-09 | 2012-07-05 | 강원대학교산학협력단 | Operating apparatus for led |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6227679B1 (en) | 1999-09-16 | 2001-05-08 | Mule Lighting Inc | Led light bulb |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8727574B2 (en) | 2010-09-21 | 2014-05-20 | Federal-Mogul Corporation | LED light module with light pipe and reflectors |
| US9642045B2 (en) | 2011-01-10 | 2017-05-02 | Huawei Technologies Co., Ltd. | Method and device for releasing context-related resource of user equipment |
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