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(12) United States Patent (10) Patent No.: US 9,144,129 B2 Munday Et Al

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(12) United States Patent (10) Patent No.: US 9,144,129 B2 Munday Et Al USOO9144129B2 (12) United States Patent (10) Patent No.: US 9,144,129 B2 Munday et al. (45) Date of Patent: Sep. 22, 2015 (54) SWITCHABLE LUMINANCE LED LIGHT 6, 2012, provisional application No. 61/667,982, filed BULB on Jul. 4, 2012. (71) Applicant: The Regents of the University of (51) Int. Cl. California, Oakland, CA (US) H05B 39/00 (2006.01) H05B33/08 (2006.01) (72) Inventors: David Munday, Santa Cruz, CA (US); (52) U.S. Cl. Ryan Baker, Santa Cruz, CA (US); CPC ........ H05B33/0839 (2013.01); H05B33/0803 Julian Dahan, Santa Cruz, CA (US); (2013.01); H05B33/0815 (2013.01); Y02B Russell Petersen, Santa Cruz, CA (US); 20/346 (2013.01) Craig Sloan, Santa Cruz, CA (US) (58) Field of Classification Search None (73) Assignee: THE REGENTS OF THE See application file for complete search history. UNIVERSITY OF CALIFORNLA, Oakland, CA (US) (56) References Cited (*) Notice: Subject to any disclaimer, the term of this U.S. PATENT DOCUMENTS patent is extended or adjusted under 35 8,853.950 B1* 10, 2014 Ch 315/127 U.S.C. 154(b) by 420 days. 2011/O133655w - - A1 6, 2011 Reckerall et. al.. .................. 315, 159 (21) Appl. No.: 13/727,463 * cited by examiner (22) Filed: Dec. 26, 2012 Primary Examiner — Lincoln Donovan O O Assistant Examiner — Khareem EAlmo (65) Prior Publication Data (74) Attorney, Agent, or Firm — Adam Warwick Bell: US 2013/0328493 A1 Dec. 12, 2013 Matthew Rupert Kaser Related U.S. Application Data (57) ABSTRACT (63) Continuation of application No. 13/727,463, filed on A switchable luminance LED light bulb, including embodi Dec. 26, 2012. ments that may be used with any common commercial fitting. (60) Provisional application No. 61/656,021, filed on Jun. 9 Claims, 6 Drawing Sheets 10 110 U.S. Patent Sep. 22, 2015 Sheet 1 of 6 US 9,144,129 B2 10 20 Fig. 1 U.S. Patent Sep. 22, 2015 Sheet 2 of 6 US 9,144,129 B2 Fig. 2 U.S. Patent Sep. 22, 2015 Sheet 3 of 6 US 9,144,129 B2 20 1 10IV Diffuser Clips 40 Light Engine FR4 PCB Screw 46 Edison Screw Cap Fig. 3 U.S. Patent Sep. 22, 2015 Sheet 4 of 6 US 9,144,129 B2 - 10 Driver Output: 175mA, 320mA LM3444 Bridge Driver IC Rectifier BuckUC Switch Converter Light Engine Fig. 4 U.S. Patent Sep. 22, 2015 Sheet 5 of 6 US 9,144,129 B2 --" 118 0 114 D2 72 U5 170 Y vil 1 line R CDBM1100 172 + 112 116 OOK 124 C4 4. 2 122 Sosnkoz ES 47F D5 128 166 10 U2 DL5244. D3 L 164 W 120 82OLF W Neutral Cowtoo L U3 LM3444 158 2 FDDSN25 COFF SNS 160 FIR GND Fig. 5 U.S. Patent Sep. 22, 2015 Sheet 6 of 6 US 9,144,129 B2 - 10 PC Board With ViaS Heat Sink Ambient Air Fig. 6 US 9,144,129 B2 1. 2 SWITCHABLE LUMINANCE LED LIGHT lighting output at the time of installation. Therefore only one BULB type of bulb need be purchased to replace a range of old standard bulbs. RELATIONSHIP TO OTHERAPPLICATIONS The present invention encompasses a Switchable lumi nance LED lightbulb device comprising a rectifier to rectify The present application claims priority to, and the benefit AC to DC, wherein the DC current is fed into a switch, the of the following applications that are entirely incorporated by Switch having a single input pole and multiple output poles reference to the fullest extent allowable by law: U.S. appli and a plurality of selectable positions, wherein the switch cation Ser. No. 6,165,6021 filed 6 Jun. 2012 titled Switch directs the current through one of a plurality of selectable 10 resistors and/or capacitors corresponding to one of a plurality able LED Light Bulb and U.S. application Ser. No. 61,667, of different DC output currents, wherein the selected DC 982 filed 4 Jul. 2012 titled “Switchable Luminance LED Light output current is fed into at least one of a plurality of light Bulb'. emitting diodes, wherein the selected DC output current cor FIELD OF THE INVENTION responds to the light output of the light emitting diodes. 15 In certain embodiments the device will include a switch that can direct the current through a number of resistors, with The presently disclosed subject matter is directed towards no switchable selection of capacitors. In other embodiments, LED-type light bulbs. More particularly the presently dis in order to increase the range of current and therefore light closed subject matter relates to LED-type light bulbs that output, the device includes a Switchable selection of capaci have switch controlled illumination intensities. tors. In this embodiment, an operator may select a combina tion of capacitors and resistors. The capacitor Switch may be BACKGROUND OF THE INVENTION placed upstream of the resistor switch, so that the current is first routed to one of a plurality of capacitors, each of which is While white light LED lightbulbs have proven to be highly may be associated with two or more resistors (for example 3. successful they have lacked one feature available in tradi 25 4, 5, 6 or more resistors). Each capacitor is associated with tional incandescent lightbulbs: the ability to provide multiple two or more resistors so as to provide a graduated increase or light outputs from one lamp. For example, 3-way Edison light decrease in current and therefore luminescence. bulbs are widely used to provide switchable light outputs. A A current regulating device may be integrated into the 3-way Edison light bulb could use switched filaments to device, and may be, in certain embodiments a step-down produce the light output of a 100 Watt, a 200 watt or a 300 watt 30 constant current controller. The device may comprise a cur light bulb. This feature has proven to be extremely popular rent-regulating device and at least one transistor, wherein the and useful. In view of the foregoing, white light LED light current regulating device modulates the gate of the output bulbs having switch-selectable light outputs would be useful transistor by reading the Voltage, thereby regulating current and commercially desirable. Even more useful would be delivered to LEDs. white light LED light bulbs having switch-selectable light 35 In some embodiments the transistor may be, but is not outputs and which mate with Edison, screw or bayonet fix necessarily, a field-effect transistor. In some embodiments it tures. may be a MOSFET. The present invention provides a white LED (light Emit BRIEF SUMMARY OF THE INVENTION ting Diode) light bulb having a plurality of (two or more) 40 white LEDs for emitting light. In some embodiments the LED The present invention provides an LED bulb (the device') light bulb includes an Edison-style screw cap for screwing with switch-selectable light outputs. The bulb may be mated into an Edison style base to receive input AC electrical power. with Edison, screw or bayonet types of lamp base fixtures. It However, the present invention is applicable to light bulbs is understood in the present disclosure that when an Edison with other types of caps for fitting other types of bases. A fixture is mentioned as an example, the applicant is only using 45 driver cover may be attached at one end to the Edison-style this as an example and implicitly includes all other types of cap. The driver cover may include an opening for an actuator fixtures such as screw or bayonet types. (any component that may be physically manipulated into The invention provides a low-power, transformerless, LED different positions such as a Switch, a slider, or a plurality of lightbulb power Supply capable of providing varying levels of push-buttons) or a multiple-throw Switch to pass through the electric current capable of powering variable numbers of 50 driver cover, which enables a user to change the switched LESd to produce proportionally varying levels of light. The pole. In some embodiments the actuator need not be manually invention allows any lamp using a standard Edison, screw operable by the user, but may be operable remotely through a bayonet type base to become an arbitrary-way lamp. This is wired connection or a wireless connection employing widely similar to the common 3-way lamp, but with the following known circuit technology. key differences: (a) no specialty lamp is required, (b) no 55 A driver board retaining the switch may beat least partially specialty 3-way bulb is required. The invention is different located within the driver cover such that the switch passes from a standard dimmable bulb. It allows for a bulb to have through the opening. The driver board receives the input AC as many discrete light output steps as desirable. The inven electrical power, rectifies that input AC electrical power into tors early prototype was capable of producing light equiva DC electrical power, and applies a constant DC current to the lent to a 40W or 60W incandescent bulb using a switch to 60 array of LEDs such that the applied current functionally select between lighting levels. Commercially the invention depends on the selected pole position of the Switch, and thus allows the manufacturer to produce one design in mass quan the light output functionally depends on the selected pole tity that will fit many needs. Due to the low power (below position. 1OW) property of the LED light bulb, this invention is an In one embodiment the invention provides an LED light appropriate replacement for almost any standard light bulb.
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