DRIVER FOR COLOR TUNABLE LIGHT EMITTING DIODES
First Claim
1. An apparatus comprising:
- an integrated circuit LED driver electrically responsive to a data signal and a clock signal for driving first, second and third light emitting diodes (LEDs), each of the first, second and third LEDs being configured to emit light at a different wavelength than either of the other LEDs, wherein the integrated circuit LED driver is connectable to a bus comprising at least two conductors configured to carry the data signal and the clock signal, the integrated circuit LED driver comprising a plurality of pulse width modulation registers selectable in combination to drive the first, second and third LEDs independent of one another to a blink rate and an intensity to control the color produced by the combination of the LEDs.
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Abstract
A decorative lighting system includes a command controller, a plurality of illumination devices and a flexible cord interconnecting each. The command controller includes a microcontroller that provides a data signal and a clock signal. The data signal instructs a plurality of addresses corresponding to the lighting devices. Each illumination device has at least three light emitting diodes (LEDs). The LEDs each emit light at a different wavelength than either of the other LEDs. An integrated circuit LED is responsive to the data signal, clock signal, and power signal and drives the first, second, and third LEDs by to a blink rate and intensity. The LED driver includes a plurality of pulse width modulation registers that are selectable in combination to drive the LEDs to a blink rate and intensity independent of one another.
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Citations
25 Claims
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1. An apparatus comprising:
an integrated circuit LED driver electrically responsive to a data signal and a clock signal for driving first, second and third light emitting diodes (LEDs), each of the first, second and third LEDs being configured to emit light at a different wavelength than either of the other LEDs, wherein the integrated circuit LED driver is connectable to a bus comprising at least two conductors configured to carry the data signal and the clock signal, the integrated circuit LED driver comprising a plurality of pulse width modulation registers selectable in combination to drive the first, second and third LEDs independent of one another to a blink rate and an intensity to control the color produced by the combination of the LEDs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus comprising:
an integrated circuit LED driver responsive to signals received by the integrated circuit LED driver according to an inter-integrated circuit protocol (I2C), the integrated circuit LED driver being responsive to the signals for driving first, second and third light emitting diodes (LEDs), each of the first, second and third LEDs being configured to emit light at a different wavelength than either of the other LEDs, wherein the integrated circuit LED driver comprises a plurality of pulse width modulation registers selectable in combination to drive the first, second and third LEDs independent of one another to a blink rate and an intensity to control the color produced by the combination of the LEDs. - View Dependent Claims (12, 13, 14, 15, 16, 17)
- 18. An apparatus electrically responsive to a data signal and a clock signal for driving red, blue and green light emitting diodes (LEDs), wherein the apparatus is connectable to a bus comprising at least two conductors configured to carry the data signal and the clock signal, the apparatus comprising a plurality of pulse width modulation registers selectable in combination to drive the LEDs independent of one another to a blink rate and an intensity to control the color produced by the combination of the LEDs.
Specification