MULTICOLORED LED LIGHTING METHOD AND APPARATUS

• US 20080012506A1
• Filed: 07/10/2007
• Published: 01/17/2008
• Est. Priority Date: 08/26/1997
• Status: Active Grant

• Current Assignee: Philips Lighting North America Corporation (Koninklijke Philips N.V.)
• Original Assignee: Color Kinetics Incorporated (Signify N.V.)
• Inventors: Mueller, George, Lys, Ihor
• Granted Patent: US 7,462,997 B2
• Time in Patent Office: Days
• US Class Current: 315/294
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21W 2131/401 for swimming pools
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G09G 2300/06 Passive matrix structure, i.e. with direct application of both column and row voltages to the light emitting or modulating elements, other than LCD or OLED
• CPC Class Codes: G09G 2310/0272 Details of drivers for data electrodes, the drivers communicating data to the pixels by means of a current
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 3/14 Semiconductor devices, e.g. diodes
• CPC Class Codes: G09G 3/2014 by modulation of the duration of a single pulse during which the logic level remains constant
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: G09G 3/3283 in which the data driver supplies a variable data current for setting the current through, or the voltage across, the light-emitting elements
• CPC Class Codes: H05B 45/20 Controlling the colour of the light
• CPC Class Codes: H05B 45/325 Pulse-width modulation [PWM]
• CPC Class Codes: H05B 45/395 Linear regulators
• CPC Class Codes: H05B 47/155 Coordinated control of two or more light sources
• CPC Class Codes: H05B 47/165 following a pre-assigned programmed sequence; Logic control [LC]
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

Apparatus and systems including one or more first LEDs, each first LED configured to generate first radiation having a first spectrum, and one or more second LEDs, each second LED configured to generate second radiation having a second spectrum different than the first spectrum. A diffuser is employed to blend the first radiation and the second radiation, when generated, so as to provide a uniform color of light having a visible spectrum based on a combination of the first spectrum and the second spectrum. One or more controllers are configured to control the first LED(s) and the second LED(s) such that visible light provided by the diffuser is perceived as one or more colors. In different aspects, the apparatus/systems may be configured to generate white light and/or multicolor light, may be formed to resemble conventional light bulbs, and may be arranged as a linear chain of nodes.

Claims

1. An illumination apparatus, comprising:

a first number of first LED light sources adapted to generate first radiation having a first spectrum;

a second number of second LED light sources adapted to generate second radiation having a second spectrum different than the first spectrum, wherein the first number and the second number are different;

at least one controller coupled to the first number of first light sources and the second number of second light sources and configured to control at least a first intensity of the first radiation and a second intensity of the second radiation such that an overall perceivable color of visible radiation generated by the apparatus is white;

at least one power connection coupled to the at least one controller, the at least one power connection configured to engage mechanically and electrically with a conventional light socket; and

at least one of a housing and a mounting for the first and second light sources and the at least one controller, wherein the at least one of the housing and the mounting is configured to resemble at least one type of conventional light bulb,

wherein the at least one controller is configured to independently control at least the first intensity of the first radiation and the second intensity of the second radiation so as to controllably vary the overall perceivable color of the visible radiation generated by the illumination apparatus, and wherein the apparatus further comprises;

at least one user interface coupled to the at least one controller and configured to facilitate an adjustment of the overall perceivable color of the visible radiation generated by the illumination apparatus.

2. An illumination apparatus, comprising:

a first number of first LED light sources adapted to generate first radiation having a first spectrum;

a second number of second LED light sources adapted to generate second radiation having a second spectrum different than the first spectrum, wherein the first number and the second number are different;

at least one controller coupled to the first number of first light sources and the second number of second light sources and configured to control at least a first intensity of the first radiation and a second intensity of the second radiation such that an overall perceivable color of visible radiation generated by the apparatus is white;

at least one power connection coupled to the at least one controller, the at least one power connection configured to engage mechanically and electrically with a conventional light socket; and

at least one of a housing and a mounting for the first and second light sources and the at least one controller, wherein the at least one of the housing and the mounting is configured to resemble at least one type of conventional light bulb,

wherein the at least one controller is configured to independently control at least the first intensity of the first radiation and the second intensity of the second radiation so as to controllably vary the overall perceivable color of the visible radiation generated by the illumination apparatus, and wherein the apparatus further comprises;

at least one sensor coupled to the at least one controller and configured to generate at least one control signal in response to at least one detectable condition, wherein the at least one controller is configured to control the overall perceivable color of the visible radiation generated by the illumination apparatus in response to the at least one control signal.

3. An illumination apparatus, comprising:

a first number of first LED light sources adapted to generate first radiation having a first spectrum;

a second number of second LED light sources adapted to generate second radiation having a second spectrum different than the first spectrum, wherein the first number and the second number are different;

at least one controller coupled to the first number of first light sources and the second number of second light sources and configured to control at least a first intensity of the first radiation and a second intensity of the second radiation such that an overall perceivable color of visible radiation generated by the apparatus is white;

at least one power connection coupled to the at least one controller, the at least one power connection configured to engage mechanically and electrically with a conventional light socket; and

at least one of a housing and a mounting for the first and second light sources and the at least one controller, wherein the at least one of the housing and the mounting is configured to resemble at least one type of conventional light bulb,

wherein the at least one controller is configured to independently control at least the first intensity of the first radiation and the second intensity of the second radiation so as to controllably vary the overall perceivable color of the visible radiation generated by the illumination apparatus, and wherein the apparatus further comprises;

at least one of a receiver and a transmitter coupled to the at least one controller and configured to communicate at least one control signal to or from the illumination apparatus.

4. An illumination apparatus, comprising:

a first number of first LED light sources adapted to generate first radiation having a first spectrum;

a second number of second LED light sources adapted to generate second radiation having a second spectrum different than the first spectrum, wherein the first number and the second number are different;

at least one controller coupled to the first number of first light sources and the second number of second light sources and configured to control at least a first intensity of the first radiation and a second intensity of the second radiation such that an overall perceivable color of visible radiation generated by the apparatus is white;

at least one power connection coupled to the at least one controller, the at least one power connection configured to engage mechanically and electrically with a conventional light socket; and

at least one of a housing and a mounting for the first and second light sources and the at least one controller, wherein the at least one of the housing and the mounting is configured to resemble at least one type of conventional light bulb,

wherein the at least one controller is configured to independently control at least the first intensity of the first radiation and the second intensity of the second radiation using a pulse width modulation (PWM) technique so as to controllably vary the overall perceivable color of the visible radiation generated by the illumination apparatus.

5. An illumination method, comprising acts of:

A) generating first radiation having a first spectrum from a first number of first LED light sources;

B) generating second radiation having a second spectrum different than the first spectrum from a second number of second LED light sources, wherein the first number and the second number are different;

C) mixing at least a portion of the first radiation and a portion of the second radiation to provide visible radiation having an overall perceivable color; and

D) controlling at least a first intensity of the first radiation and a second intensity of the second radiation such that the overall perceivable color of the visible radiation is white,

wherein the act D) includes an act of independently controlling at least the first intensity of the first radiation and the second intensity of the second radiation so as to controllably vary the overall perceivable color of the visible radiation, and wherein the method further includes an act of;

adjusting the overall perceivable color of the visible radiation via at least one user interface.

6. An illumination apparatus, comprising:

a plurality of first LED light sources adapted to generate first radiation having a first spectrum;

a plurality of second LED light sources adapted to generate second radiation having a second spectrum different than the first spectrum;

at least one controller coupled to the plurality of first light sources and the plurality of second light sources and configured to independently control at least a first intensity of the first radiation and a second intensity of the second radiation so as to controllably vary at least an overall perceivable color of visible radiation generated by the illumination apparatus, wherein;

the at least one controller is configured to generate a first control signal to control all of the first light sources substantially identically and a second control signal to control all of the second light sources substantially identically; and

the at least one controller is configured to control at least the first intensity of the first radiation and the second intensity of the second radiation such that the overall perceivable color of the visible radiation is white;

at least one power connection coupled to the at least one controller, the at least one power connection configured to engage mechanically and electrically with a conventional light socket; and

at least one user interface coupled to the at least one controller and configured to facilitate an adjustment of the overall perceivable color of the visible radiation generated by the illumination apparatus.

7. An illumination apparatus, comprising:

a plurality of first LED light sources adapted to generate first radiation having a first spectrum;

a plurality of second LED light sources adapted to generate second radiation having a second spectrum different than the first spectrum;

at least one controller coupled to the plurality of first light sources and the plurality of second light sources and configured to independently control at least a first intensity of the first radiation and a second intensity of the second radiation so as to controllably vary at least an overall perceivable color of visible radiation generated by the illumination apparatus, wherein;

the at least one controller is configured to generate a first control signal to control all of the first light sources substantially identically and a second control signal to control all of the second light sources substantially identically; and

the at least one controller is configured to control at least the first intensity of the first radiation and the second intensity of the second radiation such that the overall perceivable color of the visible radiation is white;

at least one power connection coupled to the at least one controller, the at least one power connection configured to engage mechanically and electrically with a conventional light socket; and

at least one sensor coupled to the at least one controller and configured to generate at least one control signal in response to at least one detectable condition, wherein the at least one controller is configured to control the overall perceivable color of the visible radiation generated by the illumination apparatus in response to the at least one control signal.

8. An illumination apparatus, comprising:

a plurality of first LED light sources adapted to generate first radiation having a first spectrum;

a plurality of second LED light sources adapted to generate second radiation having a second spectrum different than the first spectrum;

at least one controller coupled to the plurality of first light sources and the plurality of second light sources and configured to independently control at least a first intensity of the first radiation and a second intensity of the second radiation so as to controllably vary at least an overall perceivable color of visible radiation generated by the illumination apparatus, wherein;

the at least one controller is configured to generate a first control signal to control all of the first light sources substantially identically and a second control signal to control all of the second light sources substantially identically; and

the at least one controller is configured to control at least the first intensity of the first radiation and the second intensity of the second radiation such that the overall perceivable color of the visible radiation is white;

at least one power connection coupled to the at least one controller, the at least one power connection configured to engage mechanically and electrically with a conventional light socket; and

at least one of a receiver and a transmitter coupled to the at least one controller and configured to communicate at least one control signal to or from the illumination apparatus.

9. An illumination apparatus, comprising:

a plurality of first LED light sources adapted to generate first radiation having a first spectrum;

a plurality of second LED light sources adapted to generate second radiation having a second spectrum different than the first spectrum;

at least one controller coupled to the plurality of first light sources and the plurality of second light sources and configured to control at least a first intensity of the first radiation and a second intensity of the second radiation using a pulse width modulation (PWM) technique, wherein;

the at least one controller is configured to generate a first control signal to control all of the first light sources substantially identically and a second control signal to control all of the second light sources substantially identically; and

the at least one controller is configured to control at least the first intensity of the first radiation and the second intensity of the second radiation such that the overall perceivable color of the visible radiation is white; and

at least one power connection coupled to the at least one controller, the at least one power connection configured to engage mechanically and electrically with a conventional light socket.

10. An illumination method, comprising acts of:

A) generating first radiation having a first spectrum from a plurality of first LED light sources;

B) generating second radiation having a second spectrum different than the first spectrum from a plurality of second LED light sources;

C) mixing at least a portion of the first radiation and a portion of the second radiation to provide an overall perceivable color of the visible radiation;

D) independently controlling at least a first intensity of the first radiation and a second intensity of the second radiation so as to controllably vary at least the overall perceivable color of the visible radiation,

wherein the act D) includes acts of;

controlling all of the first light sources substantially identically;

controlling all of the second light sources substantially identically; and

controlling at least the first intensity of the first radiation and the second intensity of the second radiation such that the overall perceivable color of the visible radiation is white; and

E) adjusting the overall perceivable color of the visible radiation via at least one user interface to include white and other colors.