SOLID STATE LIGHTING DEVICES UTILIZING MEMRISTORS
First Claim
Patent Images
1. A light emitting diode (LED) chip circuit, comprising:
- an LED chip; and
a memristor arranged to vary the emission intensity of said LED chip.
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.
16 Citations
37 Claims
-
1. A light emitting diode (LED) chip circuit, comprising:
-
an LED chip; and a memristor arranged to vary the emission intensity of said LED chip. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A solid state luminaire comprising:
-
a first light emitting diode (LED) chip that can experience changes in emission over time or in response to changes in temperature; and a memristor arranged to vary the drive signal applied to said first LED chip to compensate for said emission changes. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
-
-
25. A solid state light engine comprising:
-
a light emitting diode (LED) chip array comprising first LED chips emitting at one color of light and second LED chips emitting a different color of light, wherein the emission of said first and second LED chips depreciates over time at different rates; and a memristor arranged to vary the drive signal applied to said first LED chips to compensate for said different rates of emission depreciation. - View Dependent Claims (26, 27, 28, 29)
-
-
30. The solid state luminaire, comprising:
-
a housing having a housing opening; a light engine arranged in said housing with an array of 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; and a memristor to vary the emission at least one of said first and second LED chips. - View Dependent Claims (31, 32, 33)
-
-
34. A solid state lighting device, comprising:
-
an LED; a memristor that receives DC current while the LED is being driven 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. - View Dependent Claims (35, 36, 37)
-
Specification