TECHNIQUE FOR ADJUSTING THE BRIGHTNESS OF LED LAMPS
First Claim
1. A method for adjusting the brightness of at least one LED according to a changing supply voltage provided to the at least one LED, wherein the supply voltage is provided by means of an electrical supply apparatus, which is designed to provide supply voltages over a predefined voltage range to adjust the brightness of an incandescent lamp, wherein the method is carried out by means of a control unit, which is provided for electrically coupling the electrical supply apparatus (100) to the at least one LED, comprising the following steps:
- acquiring a parameter which indicates the changing supply voltage; and
providing, on the basis of the acquired parameter, a control voltage of the at least one LED for adjusting an LED current such that the at least one LED has a predefined relative brightness change over the predefined voltage range.
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Accused Products
Abstract
A method is described for adjusting the brightness of at least one LED according to a changing supply voltage provided to the at least one LED includes acquiring a parameter which indicates the changing supply voltage; and providing, on the basis of the acquired parameter, a control voltage of the at least one LED for adjusting an LED current such that the at least one LED has a predefined relative brightness change over the predefined voltage range. A control unit and an LED lamp which implement the method described here are also discloses. Furthermore, an LED lighting apparatus and a medical diagnostic device having the LED lamp disclosed here are described.
16 Citations
20 Claims
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1. A method for adjusting the brightness of at least one LED according to a changing supply voltage provided to the at least one LED, wherein the supply voltage is provided by means of an electrical supply apparatus, which is designed to provide supply voltages over a predefined voltage range to adjust the brightness of an incandescent lamp, wherein the method is carried out by means of a control unit, which is provided for electrically coupling the electrical supply apparatus (100) to the at least one LED, comprising the following steps:
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acquiring a parameter which indicates the changing supply voltage; and providing, on the basis of the acquired parameter, a control voltage of the at least one LED for adjusting an LED current such that the at least one LED has a predefined relative brightness change over the predefined voltage range. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A control unit for adjusting the brightness of at least one LED according to a changing supply voltage provided to the at least one, wherein the control unit is designed for electrically coupling the at least one LED to an electrical supply apparatus, which is designed to provide supply voltages over a predefined voltage range, to adjust the brightness of an incandescent lamp, comprising:
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an acquisition apparatus which is designed to acquire a parameter which relates to the changing supply voltage; and a provision apparatus, which is designed to provide, on the basis of the acquired parameter, a control voltage of the at least one LED for adjusting an LED current such that the at least one LED has a predefined relative brightness change over the predefined voltage range. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification