LED with integrated constant current driver
First Claim
1. A light emitting device package comprising:
- at least one LED having at least one operating voltage; and
circuitry comprising at least one voltage level converter and at least one constant current circuit, wherein the at least one converter and the at least one circuit are integrated into the package and electrically connected to the LED.
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Accused Products
Abstract
An LED package containing integrated circuitry for matching a power source voltage to the LED operating voltage, LEDs containing such integrated circuitry, systems containing such packages, and methods for matching the source and operating voltages are described. The integrated circuitry typically contains a power converter and a constant current circuit. The LED package may also contain other active or passive components such as pin-outs for integrated or external components, a transformer and rectifier, or a rectifier circuit. External components can include control systems for regulating the LED current level or the properties of light emitted by the LED. Integrating the power supply and current control components into the LED can provide for fabrication of relatively small LEDs using fewer and less device-specific components.
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Citations
19 Claims
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1. A light emitting device package comprising:
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at least one LED having at least one operating voltage; and circuitry comprising at least one voltage level converter and at least one constant current circuit, wherein the at least one converter and the at least one circuit are integrated into the package and electrically connected to the LED. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An LED package comprising at least one voltage level converter and at least one constant current circuit, wherein the converter and the circuit are integrated into the LED package and electrically connected to the LED.
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17. A method for matching a power source voltage to an LED operating voltage, the method comprising providing a first voltage level from a power source to a drive circuitry, wherein
the circuitry is integrated into an LED package; - and
the circuitry is electrically connected to at least one LED of the LED package and provides a second voltage level to the at least one LED. - View Dependent Claims (18, 19)
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Specification