Solid state lighting devices utilizing memristors
First Claim
Patent Images
1. A circuit, comprising:
- a light emitting diode (LED);
a memristor coupled to the LED; and
a resistor connected in parallel with said memristor and coupled to the LED, in which a change in a resistance of the combination of the memristor and the resistor changes an emission intensity of the LED.
5 Assignments
0 Petitions
Accused Products
Abstract
LED chip circuits, solid state light engines and SSL luminaires are disclosed that utilize memristors to vary LED chip emission. In different embodiments the resistance of said memristor can be varied to vary the drive signal applied to one or more LED chips, thereby varying the LED chip emission intensity. The present invention can be used in much different arrangement to vary LED chip emission, such as changing the drive signals to LED chips that experience changes in emission intensity at different temperatures or that experience emission intensity depreciation over time.
-
Citations
36 Claims
-
1. A circuit, comprising:
-
a light emitting diode (LED); a memristor coupled to the LED; and a resistor connected in parallel with said memristor and coupled to the LED, in which a change in a resistance of the combination of the memristor and the resistor changes an emission intensity of the LED. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A light emitting diode (LED) chip circuit, comprising:
-
an LED chip; and a resistor circuit, coupled to said LED chip, comprising a memristor in parallel with a resistor; wherein a change in a resistance of said memristor changes a resistance of said resistor circuit. - View Dependent Claims (10)
-
-
11. A light emitting diode (LED) chip circuit, comprising:
-
an LED chip; and a bypass circuit, coupled to said LED chip, the bypass circuit comprising a memristor in parallel with a resistor to vary an emission intensity of said LED chip. - View Dependent Claims (12, 13, 14)
-
-
15. A solid state luminaire comprising:
-
a first light emitting diode (LED) chip having at least one of a time-varying emission intensity and a temperature-dependent emission intensity; a memristor to vary a drive signal applied to said first LED chip to compensate for said emission changes; and a resistor connected in parallel with said memristor. - View Dependent Claims (16, 17)
-
-
18. A solid state luminaire comprising:
-
a first light emitting diode (LED) chip having at least one of a time-varying emission intensity and a temperature-dependent emission intensity; and a resistor circuit coupled to said first LED chip, said resistor circuit comprising a memristor in parallel with resistor to vary a drive signal applied to said first LED chip to compensate for said said at least one of said time-varying emission intensity and said temperature-dependent emission intensity, wherein a change in a resistance of said memristor changes a resistance of said resistor circuit.
-
-
19. A solid state luminaire comprising:
-
a first light emitting diode (LED) chip having at least one of a time-varying emission intensity; and
a temperature-dependent emission intensity; anda bypass circuit coupled to said first LED chip, said bypass circuit comprising a memristor in parallel with a resistor to vary a drive signal applied to said first LED chip to compensate for said at least one of said time-varying emission intensity and said temperature-dependent emission intensity.
-
-
20. A solid state light engine comprising:
-
a light emitting diode (LED) chip array comprising at least one first LED chip emitting at one color of light and at least one second LED chip emitting a different color of light than said at least one first LED chip, wherein an emission of said at least one first LED chip and an emission of said at least one second LED chip depreciates over time at different rates; a memristor coupled to said LED chip array to vary a drive signal applied to said at least one first LED chip to compensate for at least a portion of said different rates of emission depreciation; and a resistor connected in parallel with said memristor. - View Dependent Claims (21, 22)
-
-
23. A solid state luminaire, comprising:
-
a housing comprising a housing opening; a light engine in said housing with an array of light emitting diode (LED) chips comprising first and second LED chips emitting at different colors of light, the light from said first and second LED chips emitting out said housing opening; a memristor to vary the emission of at least one of said first and second LED chips over time; and a resistor connected in parallel with said memristor. - View Dependent Claims (24, 25, 26)
-
-
27. A solid state lighting device, comprising:
-
a light emitting diode (LED); a memristor that receives DC current while the LED is being driven by a drive current; a drive circuit that provides said drive current, said drive circuit responsive to the memristor resistance value and varying the drive current to said LED based on the resistance of said memristor; and a resistor connected in parallel with said memristor.
-
-
28. A solid state lighting device, comprising:
-
a light emitting diode (LED); a memristor in parallel with a resistor, wherein the parallel combination of said memristor and said resistor receives DC current while the LED is being driven by a drive current; and a drive circuit that provides said drive current, said drive circuit responsive to the memristor resistance value and varying the drive current to said LED based on the resistance of said memristor, wherein the DC current received by said memristor is proportional to said drive current.
-
-
29. A solid state lighting device, comprising:
-
light emitting diode (LED); a memristor in parallel with a resistor, wherein the parallel combination of said memristor and said resistor receives DC current while the LED is being driven by a drive current; and a drive circuit that provides said drive current, said drive circuit responsive to the memristor resistance value and varying the drive current to said LED based on the resistance of said memristor, wherein the resistance of said memristor does not directly cause a change in said drive current.
-
-
30. A solid state lighting device, comprising:
-
a light emitting diode (LED); a memristor in parallel with a resistor, wherein the parallel combination of said memristor and said resistor receives DC current while the LED is being driven by a drive currents; and a drive circuit that provides said drive current, said drive circuit responsive to the memristor resistance value and varying the drive current to said LED based on the resistance of said memristor, wherein said memristor is remote to said LED.
-
-
31. A light-emitting device, comprising:
-
at least one solid-state light-emitting semiconductor device; a drive current controller, coupled to the at least one solid-state light-emitting semiconductor device, in which the drive current controller selectively varies the flow of current through the at least one solid-state light-emitting semiconductor device with a memristor in parallel with a resistor. - View Dependent Claims (32, 33, 34, 35, 36)
-
Specification