LED light for examinations and procedures
First Claim
1. A light comprising:
- (a) a base unit;
(b) an arm extending from the base unit; and
(c) a lamp head coupled to the arm, the lamp head comprising;
(i) an LED configured to provide light based on an input drive current,(ii) an optical mixing element configured to collect the light produced by the LED,(iii) a zoom lens element configured to adjust an output size of a spot generated by the light collected in the mixing element,(iv) a rotary member,(v) a fixed member, wherein the rotary member is rotatable relative to the fixed member to adjust the linear position of the zoom lens element relative to the LED to thereby adjust the output size of the spot generated by the light collected in the mixing element,(vi) a sensor configured to sense the angular position of the rotary member relative to the fixed member, and(vii) a controller receiving DC power from the base unit through the arm, the controller configured to set the input drive current for the LED to control an output light density of the spot in response to an operator selected input,the controller further configured to adjust the output light density of the spot in response to a signal from the sensor indicating a change in the angular position of the rotary member relative to the fixed member.
1 Assignment
0 Petitions
Accused Products
Abstract
A light is provided having a base unit, an arm extending from the base unit, and a lamp head coupled to the arm. The lamp head includes an LED configured to provide light based on an input drive current, an optical mixing element configured to collect the light produced by the LED and a zoom lens configured to adjust an output size of a spot generated by the light collected in the mixing element. A controller receives DC power from the base unit through the arm. The controller is configured to set the input drive current for the LED to control an output light density of the spot in response to an operator selected input and configured to adjust the output light density of the spot in response to a change in the size of the spot.
64 Citations
19 Claims
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1. A light comprising:
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(a) a base unit; (b) an arm extending from the base unit; and (c) a lamp head coupled to the arm, the lamp head comprising; (i) an LED configured to provide light based on an input drive current, (ii) an optical mixing element configured to collect the light produced by the LED, (iii) a zoom lens element configured to adjust an output size of a spot generated by the light collected in the mixing element, (iv) a rotary member, (v) a fixed member, wherein the rotary member is rotatable relative to the fixed member to adjust the linear position of the zoom lens element relative to the LED to thereby adjust the output size of the spot generated by the light collected in the mixing element, (vi) a sensor configured to sense the angular position of the rotary member relative to the fixed member, and (vii) a controller receiving DC power from the base unit through the arm, the controller configured to set the input drive current for the LED to control an output light density of the spot in response to an operator selected input, the controller further configured to adjust the output light density of the spot in response to a signal from the sensor indicating a change in the angular position of the rotary member relative to the fixed member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of operating a light, the method comprising:
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(a) determining a drive current level for an LED to obtain a light density output of the light; (b) adjusting a zoom lens in the light to adjust a spot size of the light, wherein the act of adjusting a zoom lens comprises rotating a rotary element relative to a fixed element; (c) detecting a change in angular position of the rotary element relative to the fixed element; (d) calculating a change in the drive current level for the LED based on the detected change in angular position of the rotary element to maintain the light density output; and (e) driving the LED with the changed drive current. - View Dependent Claims (16, 17)
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18. A light comprising:
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(a) a base unit; (b) an arm extending from the base unit; and (c) a lamp head coupled to the arm, the lamp head comprising; (i) a light source configured to provide light based on an input drive current, (ii) a zoom lens element configured to adjust an output size of a spot generated by light emitted from the light source, (iii) a rotary member, (iv) a fixed member, wherein the rotary member is rotatable relative to the fixed member to adjust the linear position of the zoom lens element relative to the light source to thereby adjust the output size of the spot generated by the light emitted from the light source, (vi) a sensor configured to sense the angular position of the rotary member relative to the fixed member, and (vii) a controller configured to set an input drive current for the light source to control an output light density of the spot, wherein the controller is further configured to adjust the output light density of the spot in response to a signal from the sensor indicating a change in the angular position of the rotary member relative to the fixed member. - View Dependent Claims (19)
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Specification