# US 9,049,769 B2 · LED light bulb with failure indication and color change capability > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,049,769 B2 - Document ID: US9049769B2 - Status: Granted - Kind: B2 - Application number: 13/911,441 - Filed: 2013-06-06 - Published: 2013-12-12 - Granted: 2015-06-02 - Earliest claimed: 2012-06-07 - Applicants: Seckin Kemal Secilmis - Inventors: Seckin Kemal Secilmis - Web page: https://patentgrep.com/patent/US9049769B2 ## CPC - H05B 45/50: responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits - H05B 45/24: using electrical feedback from LEDs or from LED modules - H05B 45/3578: Emulating the electrical or functional characteristics of discharge lamps - H05B 45/46: having LEDs disposed in parallel lines - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL ## Abstract A LED light for replacing a fluorescent light in a fluorescent fixture is disclosed. The LED light is compatible with the existing fluorescent light fixture and ballast. The LED light includes a failure indicator to show whether a failure of the LED light is due to a failure of the ballast or a problem within the light. The LED light includes a color change mechanism, which may be controlled by an electromagnetic field or an input current to the LED light, thus making it compatible with current dimmer systems. ## Claims ### Claim 1 A system for replacing a fluorescent light bulb with a light-emitting diode (LED) light bulb that is compatible with the existing fluorescent light ballast, the system comprising: a power connector configured to receive power from a fluorescent light ballast; a first LED configured to produce a first color of light, the first LED connected to the power connector; a second LED configured to produce a second color of light, the second LED connected to the power connector; a sensor connected to the power connector and configured to detect a magnetic field, the sensor further configured to activate the first LED when an electromagnetic field is not detected, the sensor still further configured to activate the second LED when an electromagnetic field is detected; and a failure LED configured to illuminate when at least one of the first LED and the second LED fails, the failure LED connected to the power connector. ### Claim 2 (depends on 1) The system of claim 1, wherein the sensor is configured to deactivate the second LED with the first LED is activated, and to deactivate the first LED when the second LED is activated. ### Claim 3 (depends on 1) The system of claim 1, wherein the first LED comprises a first plurality of LEDs connected in series, the first plurality of LEDs configured to produce the first color of light; and the second LED comprises a second plurality of LEDs connected in series, the second plurality of LEDs configured to produce the second color of light. ### Claim 4 (depends on 1) The system of claim 1, further comprising: a zener diode configured to breakdown above a predetermined voltage level, thereby permitting current to reach the failure LED. ### Claim 5 (depends on 4) The system of claim 4, wherein the predetermined voltage level is indicative of a failure in at least one of the first LED and the second LED. ### Claim 6 (depends on 1) The system of claim 1, wherein the power connector comprises a fluorescent light pin and a printed circuit board. ### Claim 7 A system for replacing a fluorescent light bulb with a light-emitting diode (LED) light bulb that is compatible with the existing fluorescent light ballast, the system comprising: a power connector configured to receive power from a fluorescent light ballast; a first LED configured to produce a first color of light, the first LED connected to the power connector; a second LED configured to produce a second color of light, the second LED connected to the power connector; a sensor connected to the power connector and configured to detect an electrical current, the sensor further configured to produce a signal indicative of the level of the electrical current; a microcontroller programmed to activate at least one of the first LED and the second LED in response to a signal received from the sensor, the microcontroller connected to the first LED, the second LED, and the sensor; and a failure LED configured to illuminate when at least one of the first LED and the second LED fails, the failure LED connected to the power connector. ### Claim 8 (depends on 7) The system of claim 7, wherein the microcontroller is further programmed to deactivate the first LED in response to a signal received from the sensor and to deactivate the second LED in response to a signal received from the sensor. ### Claim 9 (depends on 7) The system of claim 7, wherein the first LED comprises a first plurality of LEDs connected in series, the first plurality of LEDs configured to produce the first color of light; and the second LED comprises a second plurality of LEDs connected in series, the second plurality of LEDs configured to produce the second color of light. ### Claim 10 (depends on 7) The system of claim 7, further comprising: a zener diode configured to breakdown above a predetermined voltage level, thereby permitting current to reach the failure LED. ### Claim 11 (depends on 10) The system of claim 10, wherein the predetermined voltage level is indicative of a failure in at least one of the first LED and the second LED. ### Claim 12 (depends on 7) The system of claim 7, wherein the power connector comprises a fluorescent light pin and a printed circuit board. ### Claim 13 (depends on 7) The system of claim 7, wherein the sensor comprises a current sense resistor.