IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0953451
(2015-11-30)
|
등록번호 |
US-9426854
(2016-08-23)
|
발명자
/ 주소 |
- Ramabhadran, Ramanujam
- Lavigne, Eric
- Hartman, Michael James
- Maricic, Danijel
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
12 |
초록
▼
An electronic driver for operating an illumination device is provided. The electronic driver includes a power converter configured to illuminate the illumination device. The power converter includes a switch capacitor circuit configured to perform at least one of a pulse width modulation dimming and
An electronic driver for operating an illumination device is provided. The electronic driver includes a power converter configured to illuminate the illumination device. The power converter includes a switch capacitor circuit configured to perform at least one of a pulse width modulation dimming and a visible light communication using the illumination device. The switch capacitor circuit includes a plurality of split capacitors operatively coupled in series to a second end of a primary winding of a transformer in the power converter and a control switch operatively coupled to the plurality of split capacitors. The power converter also includes a controller operatively coupled to the control switch and is configured to control the control switch to perform at least one of the pulse width modulation dimming and the visible light communication.
대표청구항
▼
1. An electronic driver for operating an illumination device, comprising: a power converter configured to illuminate the illumination device and comprising: a first string comprising a plurality of switches operatively coupled to each other in a series configuration;a resonant tank circuit operative
1. An electronic driver for operating an illumination device, comprising: a power converter configured to illuminate the illumination device and comprising: a first string comprising a plurality of switches operatively coupled to each other in a series configuration;a resonant tank circuit operatively coupled to the first string and comprising a resonant inductor and a blocking capacitor operatively coupled to each other in series, wherein the resonant inductor is operatively coupled in series to the first string at a first node;a transformer comprising a primary winding and a secondary winding, wherein a first end of the primary winding is operatively coupled in series to the blocking capacitor of the resonant tank circuit;a rectifier operatively coupled in series to the secondary winding of the transformer;a switch capacitor circuit configured to perform at least one of a pulse width modulation dimming and a visible light communication using the illumination device and comprising: a plurality of split capacitors operatively coupled to a second end of the primary winding of the transformer;a control switch operatively coupled to the plurality of split capacitors; anda controller operatively coupled to the control switch and configured to control the control switch to perform at least one of the pulse width modulation dimming and the visible light communication. 2. The electronic driver of claim 1, wherein the switch capacitor circuit further comprises a first switch capacitor sub-circuit and a second switch capacitor sub-circuit, wherein the first switch capacitor sub-circuit is configured to perform the pulse width modulation dimming and the second switch capacitor sub-circuit is configured to perform the visible light communication, and wherein the first switch capacitor sub-circuit and the second switch capacitor sub-circuit are configured to simultaneously perform the pulse width modulation dimming and the visible light communication. 3. The electronic driver of claim 2, wherein the first switch capacitor sub-circuit comprises a first split capacitor, a second split capacitor, a first control switch, and a first controller, and wherein the first control switch is operatively coupled to the first split capacitor and the second split capacitor at a second node and a third node respectively. 4. The electronic driver of claim 3, wherein the first split capacitor and the second split capacitor have a determined first ratio of capacitance. 5. The electronic driver of claim 3, wherein the first controller is configured to control the first control switch to perform the pulse width modulation dimming based on a first differential power gain generated by the first split capacitor and the second split capacitor. 6. The electronic driver of claim 2, wherein the second switch capacitor sub-circuit comprises a third split capacitor, a fourth split capacitor, a second control switch, and a second controller, and wherein the second control switch is operatively coupled to the third split capacitor and the fourth split capacitor at a fourth node and a fifth node respectively. 7. The electronic driver of claim 6, wherein the third split capacitor and the fourth split capacitor have a determined second ratio of capacitance. 8. The electronic driver of claim 6, wherein the second controller is configured to control the second control switch to perform the visible light communication based on a second differential power gain generated by the third split capacitor and the fourth split capacitor. 9. The electronic driver of claim 1, further comprising a second string operatively coupled to the first string in a parallel configuration, wherein the second string comprises a plurality of diodes operatively coupled to each other in a series configuration. 10. The electronic driver of claim 9, further comprising a clamped capacitor operatively coupled between a sixth node and a seventh node, wherein the sixth node is located between the resonant tank circuit and the primary winding of the transformer, and wherein the seventh node is located between the first string and the second string. 11. The electronic driver of claim 1, wherein the first string is operatively coupled to a direct current power source. 12. The electronic driver of claim 1, wherein the rectifier is operatively coupled to the illumination device. 13. The electronic driver of claim 1, wherein the illumination device comprises a light emitting diode. 14. The electronic driver of claim 1, wherein the plurality of switches comprises metal oxide semiconductor field effect transistors or insulated gate bipolar transistors. 15. A method for operating an illumination device, comprising: operating a power converter in an electronic driver at a first operating frequency to illuminate the illumination device;operating a switch capacitor circuit in the electronic driver at a second operating frequency;generating a differential power gain based on the second operating frequency using the switch capacitor circuit; andperforming, via the electronic driver, at least one of a pulse width modulation dimming and a visible light communication using the illumination device based on the differential power gain. 16. The method of claim 15, wherein operating the switch capacitor circuit further comprises operating a first switch capacitor sub-circuit and a second switch capacitor sub-circuit in the switch capacitor circuit at the second operating frequency. 17. The method of claim 16, wherein generating the differential power gain comprises generating a first differential power gain using the first switch capacitor sub-circuit operating at the second operating frequency and generating a second differential power gain using the second switch capacitor sub-circuit operating at the second operating frequency. 18. The method of claim 17, further comprising simultaneously performing the pulse width modulation dimming and the visible light communication, wherein the pulse width modulation dimming is performed using the first differential power gain, and wherein the visible light communication is performed using the second differential power gain. 19. The method of claim 15, further comprising using the differential power gain to maintain a constant level of output direct current, while a duty cycle of the illumination device is altered. 20. A lighting system, comprising: a power source;an illumination device;an electronic driver configured to perform at least one of a pulse width modulation dimming and a visible light communication using the illumination device, wherein the electronic driver comprises: a power converter configured to illuminate the illumination device;a switch capacitor circuit configured to: generate a differential power gain; andperform at least one of the pulse width modulation dimming and the visible light communication using the illumination device based on the differential power gain.
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