Dimming range extension
US-2015048761-A1 · Feb 19, 2015 · US
Low-cost low-power lighting system and lamp assembly
US9521711B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9521711-B2 |
| Application number | US-201414166211-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 28, 2014 |
| Priority date | Jan 28, 2014 |
| Publication date | Dec 13, 2016 |
| Grant date | Dec 13, 2016 |
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Abstract
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In accordance with embodiments of the present disclosure, a method and apparatus may include receiving an input waveform from a dimmer, wherein the input waveform is periodic at a first frequency. The method and apparatus may also include generating an output waveform independent of a load coupled to the output waveform, wherein the output waveform is periodic at a second frequency substantially greater than the first frequency, wherein at least one of the second frequency and an amplitude of the output waveform is based on a phase-cut angle of the input waveform indicative of a control setting of the dimmer.
First claim
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What is claimed is: 1. An apparatus comprising a modulator having an input and an output configured to: receive at the input an input waveform from a dimmer, wherein the input waveform is periodic at a first frequency; and generate at the output an output waveform independent of a load coupled to the output, wherein the output waveform is periodic at a second frequency substantially greater than the first frequency, wherein the second frequency is based on a phase-cut angle of the input waveform indicative of a control setting of the dimmer. 2. The apparatus of claim 1 , further comprising the dimmer. 3. The apparatus of claim 2 , wherein the dimmer comprises one of a leading-edge dimmer and a trailing-edge dimmer. 4. The apparatus of claim 1 , wherein the output waveform comprises one of a square waveform, triangular waveform, sawtooth waveform, and a sinusoidal waveform. 5. The apparatus of claim 1 , wherein the output waveform comprises a waveform with an envelope function proportional to the input waveform. 6. The apparatus of claim 1 , wherein the second frequency and an amplitude of the output waveform are based on a phase-cut angle of the input waveform. 7. The apparatus of claim 1 , wherein the modulator is configured to drive a plurality of parallel lamp assemblies, each of the parallel lamp assemblies comprising a capacitor in series with a light source for converting electrical energy of the output waveform into photonic energy. 8. A method comprising: receiving an input waveform from a dimmer, wherein the input waveform is periodic at a first frequency; and generating an output waveform independent of a load coupled to the output waveform, wherein the output waveform is periodic at a second frequency substantially greater than the first frequency, wherein the second frequency is based on a phase-cut angle of the input waveform indicative of a control setting of the dimmer. 9. The method of claim 8 , wherein the dimmer comprises one of a leading-edge dimmer and a trailing-edge dimmer. 10. The method of claim 8 , wherein the output waveform comprises one of a square waveform, triangular waveform, sawtooth waveform, and a sinusoidal waveform. 11. The method of claim 8 , wherein the output waveform comprises a waveform with an envelope function proportional to the input waveform. 12. The method of claim 8 , wherein the second frequency and an amplitude of the output waveform are based on a phase-cut angle of the input waveform. 13. The method of claim 8 , wherein the output waveform is configured to drive a plurality of parallel lamp assemblies, each of the parallel lamp assemblies comprising a capacitor in series with a light source for converting electrical energy of the output waveform into photonic energy.
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- What does patent US9521711B2 cover?
- In accordance with embodiments of the present disclosure, a method and apparatus may include receiving an input waveform from a dimmer, wherein the input waveform is periodic at a first frequency. The method and apparatus may also include generating an output waveform independent of a load coupled to the output waveform, wherein the output waveform is periodic at a second frequency substantiall…
- Who is the assignee on this patent?
- Koninklijke Philips Nv, Philips Lighting Holding Bv
- What technology area does this patent fall under?
- Primary CPC classification H05B47/10. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Dec 13 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).