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US 11,628,234 B2Granted
White light LED light bulbs for ambient lighting and pathogen inactivation
AssigneeKnow Labs, Inc.
InventorPhillip Bosua
Life of this patent
Estimating the term…
Abstract
Consumable and replaceable light bulbs that emit white light to provide ambient lighting and also emit UV light for pathogen inactivation. The white light and the UV light may be emitted simultaneously or the light bulb can be controlled to emit the white light and the UV light at separate times. The UV light emitted by the light bulbs has a wavelength and output power that is safe for humans and pets and the UV light inactivates pathogens over relatively prolonged exposure periods. The light bulbs described herein can be used in place of conventional light bulbs, for example in a room of a home, office building or other human occupied space. Humans can remain in the space when the light bulb(s) is on without being harmed by the UV light.
Claims45
A light bulb, comprising:
- a housing;
- a screw-thread base attached to the housing for threading the light bulb into a threaded socket;
- the housing defining an interior space;
- white light emitting diodes in the interior space, the white light emitting diodes are capable of emitting white light;
- blue light emitting diodes in the interior space, the blue light emitting diodes are capable of emitting ultraviolet (UV) light;
- a visible wavelength filter positioned relative to the blue light emitting diodes to filter out visible wavelengths of the UV light emitted by any one or more of the blue light emitting diodes,
- wherein the visible wavelength filter has a black color, and the visible wavelength filter is centrally positioned at an end of the housing opposite the screw-thread base.
4 more elements
A light bulb, comprising:
- a housing;
- a screw-thread base attached to the housing for threading the light bulb into a threaded socket;
- the housing defining an interior space;
- white light emitting diodes in the interior space, the white light emitting diodes are capable of emitting white light;
- blue light emitting diodes in the interior space, the blue light emitting diodes are capable of emitting ultraviolet (UV) light;
- a visible wavelength filter positioned relative to the blue light emitting diodes to filter out visible wavelengths of the UV light emitted by any one or more of the blue light emitting diodes, wherein the visible wavelength filter has a black color, and the visible wavelength filter is centrally positioned at an end of the housing opposite the screw-thread base;
- and the light bulb is devoid of phosphor through which UV light emitted by any one or more of the blue light emitting diodes passes for conditioning the UV light.
4 more elements
A light bulb, comprising:
- a housing;
- a screw-thread base attached to the housing for threading the light bulb into a threaded socket;
- the housing defining an interior space;
- white light emitting diodes in the interior space, the white light emitting diodes are capable of emitting white light;
- blue light emitting diodes in the interior space, the blue light emitting diodes are capable of emitting ultraviolet (UV) light;
- a visible wavelength filter positioned relative to the blue light emitting diodes to filter out visible wavelengths of the UV light emitted by any one or more of the blue light emitting diodes, wherein the visible wavelength filter has a black color, and the visible wavelength filter is centrally positioned at an end of the housing opposite the screw-thread base;
- a distance sensor;
- a motion sensor;
- and
- a controller, wherein the controller is operatively connected to the distance sensor, the motion sensor, the white light emitting diodes and to the blue light emitting diodes in a manner so that the light bulb can be controlled by the controller to operate in any operational mode of a set of operational modes comprising:
- a first mode, wherein when no motion is detected by the motion sensor, both the blue light emitting diodes and the white light emitting diodes are on, when motion is sensed by the motion sensor, both the blue light emitting diodes and the white light emitting diodes are on, and wherein when a person is within a threshold range of the light bulb, the blue light emitting diodes are off and the while light emitting diodes are on;
- a second mode, wherein when no motion is detected by the motion sensor, both the blue light emitting diodes and the white light emitting diodes are on, when motion is sensed by the motion sensor, the blue light emitting diodes are off and the white light emitting diodes are on, and wherein when a person is within a threshold range of the light bulb, the blue light emitting diodes are off and the while light emitting diodes are on;
- a third mode, wherein when no motion is detected by the motion sensor, the blue light emitting diodes are on and the white light emitting diodes are off, when motion is sensed by the motion sensor, both the blue light emitting diodes and the white light emitting diodes are on, and wherein when a person is within a threshold range of the light bulb, the blue light emitting diodes are off and the while light emitting diodes are on;
- and
- a fourth mode, wherein when no motion is detected by the motion sensor, the blue light emitting diodes are on and the white light emitting diodes are off, when motion is sensed by the motion sensor, the blue light emitting diodes are off and the white light emitting diodes are on, and wherein when a person is within a threshold range of the light bulb, the blue light emitting diodes are off and the while light emitting diodes are on.
12 more elements
Dependencies are inferred from the claim text.