Lighting systems and related methods

• US 8,440,899 B1
• Filed: 07/15/2010
• Issued: 05/14/2013
• Est. Priority Date: 04/16/2009
• Status: Active Grant

• Current Assignee: Retinal 3-D, LLC
• Original Assignee: Retinal 3-D, LLC
• Inventors: Bowser, Roger C., Neal, Lawrence A. Jr.
• Primary Examiner(s): Qin, Jianchun
• Application Number:
  US12/837,261
• Time in Patent Office: 1,034 Days
• Field of Search: 846/09
• US Class Current: 84/609
• CPC Class Codes: G10H 1/0066 using a MIDI interface
• CPC Class Codes: G10H 2220/411 Light beams key actuation detection using light G10H2220/305
• CPC Class Codes: G10H 2220/521 Hall effect transducers or similar magnetic field sensing semiconductor devices, e.g. for string vibration sensing or key movement sensing
• CPC Class Codes: H05B 47/165 following a pre-assigned programmed sequence; Logic control [LC]
• CPC Class Codes: H05B 47/18 via data-bus transmission

Abstract

A lighting system. Implementations may include an AC input power source coupled with a power conditioning and control module adapted output a low voltage high frequency pulse width modulated (PWM) signal. A remote transmission cable may be adapted to carry the low voltage high frequency PWM signal to a remote transformer adapted to convert the low voltage high frequency PWM signal to a high voltage high frequency PWM signal. A charge pump may be included which is adapted to receive the high voltage high frequency PWM signal and increase a voltage of the signal. A gas discharge tube may be coupled to the charge pump. A controller may be coupled to the power conditioning and control module and adapted to operate the gas discharge tube at two or more light intensity levels with the low voltage high frequency PWM signal.

Claims

1. A lighting system comprising:

an alternating current (AC) input power source coupled with a power conditioning and control module, the power conditioning and control module adapted to receive an AC power signal from the AC input power source and to output a low voltage high frequency pulse width modulated (PWM) signal;

a remote transmission cable coupled to the power conditioning and control module and to a remote transformer, the remote transmission cable adapted to carry the low voltage high frequency PWM signal, and the remote transformer adapted to convert the low voltage high frequency PWM signal to a high voltage high frequency PWM signal;

a charge pump comprising one or more stages, the charge pump coupled to the remote transformer and adapted to receive the high voltage high frequency PWM signal and increase a voltage of the high voltage high frequency PWM signal with the one or more stages;

a gas discharge tube coupled to the charge pump; and

a controller coupled to the power conditioning and control module;

wherein the controller is adapted to operate the gas discharge tube at two or more light intensity levels with the low voltage high frequency PWM signal produced by the power conditioning and control module.

2. The lighting system of claim 1, further comprising a Hall effect sensor coupled to the controller and located adjacent to the remote transformer.

3. The lighting system of claim 1, further comprising an opto-isolator coupled to the controller and coupled to the charge pump.

4. The lighting system of claim 1, wherein the gas discharge tube has a first end and a second end and the remote transformer is a first remote transformer coupled to the first end and a second remote transformer is coupled to the second end and the first remote transformer and the second remote transformer are flyback transformers.

5. The lighting system of claim 1, wherein the remote transmission cable is a balanced differential transmission cable comprising at least one of a coaxial cable, a twinaxial cable, a triaxial cable, and a twisted pair cable.

6. The lighting system of claim 5, wherein the remote transmission cable is longer than about 20 feet.

7. The lighting system of claim 1, wherein the power conditioning and control module comprises:

an electromagnetic interference (EMI)/radio frequency interference (RFI) filter coupled to the AC power source;

one or more electronic power supplies (EPS) each comprising;

a power factor controller (PFC) coupled to the EMI/RFI filter; and

an LLC resonant converter coupled to the PFC; and

one or more electronic power supply (EPS) switchers comprising an intensity selection circuit, the one or more EPS switchers coupled to each of the one or more EPS and to the remote transmission cable.

8. The lighting system of claim 7, wherein the controller comprises a microprocessor coupled with firmware comprising one or more duty cycle values and one or more switching frequency values for the one or more EPS switchers corresponding to one or more light intensity levels for the gas discharge tube.

9. The lighting system of claim 1, further comprising a control computer comprising a daughter card coupled with the controller, the daughter card adapted to convert a control sequence comprising one or more visual element parameters from the control computer to a data format used by the controller to operate the power conditioning and control module.