LED lighting system

• US 10,057,955 B2
• Filed: 11/02/2016
• Issued: 08/21/2018
• Est. Priority Date: 02/09/2006
• Status: Active Grant

• Current Assignee: LED Smart Inc.
• Original Assignee: LED Smart Inc.
• Inventors: Shan, Xinxin
• Primary Examiner(s): Le, Tung X
• Application Number:
  US15/341,825
• Publication Number:
  US 20170142796A1
• Time in Patent Office: 657 Days
• Field of Search: 315291, 315297, 315307, 315312
• CPC Class Codes: B60Q 1/26 the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
• CPC Class Codes: B60Q 1/2611 Indicating devices mounted on the roof of the vehicle
• CPC Class Codes: B60Q 2400/20 Multi-color single source or LED matrix, e.g. yellow blinker and red brake lamp generated by single lamp
• CPC Class Codes: B60Q 3/43 General lighting
• CPC Class Codes: F21K 9/27 Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
• CPC Class Codes: F21K 9/272 Details of end parts, i.e. the parts that connect the light source to a fitting; Arrangement of components within end parts F21K9/278 takes precedence
• CPC Class Codes: F21K 9/275 Details of bases or housings, i.e. the parts between the light-generating element and the end caps; Arrangement of components within bases or housings F21K9/278 takes precedence
• CPC Class Codes: F21K 9/278 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21S 4/28 rigid, e.g. LED bars
• CPC Class Codes: F21V 15/015 Devices for covering joints between adjacent lighting devices; End coverings
• CPC Class Codes: F21V 17/104 using feather joints, e.g. tongues and grooves, with or without friction
• CPC Class Codes: F21V 23/04 the elements being switches safety devices F21V25/00
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2107/30 on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G09F 13/00 Illuminated signs; Luminous advertising G09F9/00, G09F11/00 take precedence; control of displays in general using static means to present variable information G09G
• CPC Class Codes: G09F 21/04 : by land vehicles
• CPC Class Codes: H05B 45/00 : Circuit arrangements for operating light-emitting diodes [LED]
• CPC Class Codes: H05B 45/10 : Controlling the intensity of the light
• CPC Class Codes: H05B 45/305 : Frequency-control circuits
• CPC Class Codes: H05B 45/325 : Pulse-width modulation [PWM]
• CPC Class Codes: H05B 45/345 : Current stabilisation; Maintaining constant current
• CPC Class Codes: H05B 45/37 : Converter circuits
• CPC Class Codes: H05B 45/382 : with galvanic isolation between input and output
• CPC Class Codes: H05B 45/50 : responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
• CPC Class Codes: H05B 45/56 : involving measures to prevent abnormal temperature of the LEDs
• CPC Class Codes: H05B 47/10 : Controlling the light source
• CPC Class Codes: H05B 47/165 : following a pre-assigned programmed sequence; Logic control [LC]
• CPC Class Codes: H05B 47/17 : Operational modes, e.g. switching from manual to automatic mode or prohibiting specific operations
• CPC Class Codes: H05B 47/19 : via wireless transmission
• CPC Class Codes: Y02B 20/30 : Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
• CPC Class Codes: Y10S 362/80 : Light emitting diode

Abstract

An LED lighting system is provided for connection to a variable power source providing input power, the LED lighting system having at least one power analyzing and processing circuitry connecting to the variable power source, and being configured to identify one or more characteristics of the input power, where the characteristics are selected from amplitude, frequency and pulse width of the input power, compare one or more of the characteristics of the input power to preset control criteria either in hardware or software or both to yield a comparison result, and then control the current control circuitry according to the comparison result.

Claims

1. Plural controllers connected to an LED lighting system, each controller of the plural controllers being configured to:

provide an output to the LED lighting system;

control one or more characteristics of the output, the characteristics being selected from the group comprising voltage amplitude, power frequency, and pulse width; and

detect a change of the one or more characteristics of the output to identify a working status of the LED lighting system to synchronize a control status of the plural controllers in the LED lighting system.

2. The plural controllers of claim 1, in which the LED lighting system comprises power control circuitry configured to detect the change of the one or more characteristics of the output to output a control signal, the control signal being applied to a control circuit to effect a change in the working status of the LED lighting system.