- Patent Title: Solid state lighting apparatuses, circuits, methods, and computer program products providing targeted spectral power distribution output using pulse width modulation control
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Application No.: US14813308Application Date: 2015-07-30
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Publication No.: US09706611B2Publication Date: 2017-07-11
- Inventor: Mike Walters , Jason Taylor , Daniel Pope
- Applicant: CREE, INC.
- Applicant Address: US NC Durham
- Assignee: Cree, Inc.
- Current Assignee: Cree, Inc.
- Current Assignee Address: US NC Durham
- Agency: Myers Bigel, P.A.
- Main IPC: H05B33/08
- IPC: H05B33/08
Abstract:
A solid state lighting apparatus can include a variable color input signal configured to indicate a target color of light output from the apparatus. A string current Pulse Width Modulation (PWM) controller circuit can be coupled to the variable color input signal, where the string current PWM controller circuit can be configured to generate a plurality of PWM signals having respective variable duty cycles to enable/disable respective particular string currents for respective variable times as the variable color input signal changes.
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