Elongated Lighting Apparatus

Abstract

An elongated lighting apparatus includes an elongated housing and one or more elongated light source. The elongated light sources are inside the housing. Each elongated light source is coupled with at least one elongated lens on the housing. There is a means mounted on the housing for adjusting the direction, or the beam angle, or both, of the light emitted out of the at least one elongated lens. The at least one elongated lens and the elongated housing may be coated with an anti-bacterial photocatalytic film that can be activated by visible light.

Claims

1. An elongated lighting apparatus, comprising: an elongated housing; an elongated light source, wherein: the elongated light source is dispersed inside the elongated housing, and the elongated light source is coupled with an elongated lens on the housing; a first mechanism configured to adjust a center direction of a light emitted out of the elongated lens with the center direction of the light being perpendicular to an axis of the elongated lens; and a second mechanism configured to expand or contract a beam angle of the light emitted out of the elongated lens with the center direction of the light being adjusted by the first mechanism.

2. (canceled)

3. (canceled)

4. (canceled)

5. The elongated lighting apparatus of claim 4, wherein the second mechanism is configured to adjust vertically the beam angle of the light emitted out of the elongated lens is by changing a distance between the elongated lens and the elongated light source.

6. The elongated lighting apparatus of claim 4, wherein the second mechanism is configured to adjust horizontally the beam angle of the light emitted out of the elongated lens, and wherein the second mechanism comprises an elongated shutter that changes an effective width of the elongated lens in a direction perpendicular to the axis of the elongated lens.

7. The elongated lighting apparatus of claim 1, wherein an exterior of the elongated lens or an exterior of the elongated housing, or both, is or are coated with an anti-bacterial photocatalytic film.

8. The elongated lighting apparatus of claim 7, wherein the anti-bacterial photocatalytic film is photocatalytic activated by a light of the elongated light source.

9. The elongated lighting apparatus of claim 7, wherein the anti-bacterial photocatalytic film is photocatalytic activated by ambient light with at least 95% of a spectral power distribution (SPD) in a visible light wavelength range greater than 400 nm.

10. The elongated lighting apparatus of claim 7, wherein a main active ingredient of the anti-bacterial photocatalytic film comprises titanium dioxide (TiO2).

11. The elongated lighting apparatus of claim 10, wherein the main active ingredient comprises rhombus-shaped anatase-type titanium dioxide (TiO2).

12. The elongated lighting apparatus of claim 7, wherein the anti-bacterial photocatalytic film contains at least one other active metal ingredient comprising silver, gold, copper, zinc, nickel, or a combination thereof.

13. The elongated lighting apparatus of claim 7, wherein a main active ingredient of the anti-bacterial photocatalytic film comprises a noble metal nanoparticle comprising gold (Au) or sliver (Ag).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are included to aid further understanding of the present disclosure, and are incorporated in and constitute a part of the present disclosure. The drawings illustrate a select number of embodiments of the present disclosure and, together with the detailed description below, serve to explain the principles of the present disclosure. It is appreciable that the drawings are not necessarily to scale, as some components may be shown to be out of proportion to size in actual implementation in order to clearly illustrate the concept of the present disclosure.

[0016] FIG. 1a schematically depicts a diagram of the exterior of an elongated lighting apparatus with LED light sources and a rotating knob.

[0017] FIG. 1b schematically depicts the interior of the elongated lighting apparatus.

[0018] FIG. 1c schematically depicts the cross section of the elongated lighting apparatus.

[0019] FIG. 2 schematically depicts a diagram of an elongated lighting apparatus with an adjustable beam angle through the changing of the distance of the elongated lens to the coupled elongated light source.

[0020] FIG. 3 schematically depicts a diagram of an elongated lighting apparatus with a shutter for adjusting the beam angle.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Overview

[0021] Various implementations of the present disclosure and related inventive concepts are described below. It should be acknowledged, however, that the present disclosure is not limited to any particular manner of implementation, and that the various embodiments discussed explicitly herein are primarily for purposes of illustration. For example, the various concepts discussed herein may be suitably implemented in a variety of lighting apparatuses having different form factors.

Example Implementations

[0022] The FIG. 1a, 1b, 1c are an elongated lighting apparatus of the present disclosure in the form of an overbed lighting fixture, where FIG. 1a shows the exterior of the fixture, the FIG. 1b the interior of the fixture, and the FIG. 1c the cross-section view of the fixture. The fixture 100 has a housing 101, three elongated LED lighting sources 102a, 102b, 102c, and three elongated lens 103a, 103b, 103c. The overbed light is hung over the head of a patient bed. For reading light mode, the light source 102a is turned on and its light shines through the lens 103a. Notice that the light source 102a and the lens 103a are titled with an angle so that the light coming out from the lens 103a has a forward throw, thus provide adequate lighting coverage for the half of the bed closer to the fixture for reading application. For ambient light mode, the light source 102b is turned on and its light shines through the lens 103b toward the ceiling. The light source 102c may be used for the examination light mode. Its light shines through the lens 103c. The rotating knobs 104a, 104b are used to adjust the direction of the lens 103c. When in examination mode, either of the knobs 104a, 104b can be used to adjust the lighting direction of the lens 103c downward and toward the patient, thus providing sufficient light level for the healthcare personnel to perform examination on the patient. The direction of the lens 103c can also be adjusted upward thus bouncing the light off the ceiling, rather than shining directly to the patient, in case indirect lighting is more desirable or when it is necessary to use the light of the light source 102b to enhance the light level for the ambient lighting mode.

[0023] The exterior of the fixture 100, including the housing 101 and the lens 103a, 103b, 103c is coated with an anti-bacterial photocatalytic film that contains rhombus-shaped anatase-type titanium dioxide and nano silver. The anti-bacterial photocatalytic film can be activated by either the light of the fixture or ambient light for killing airborne bacteria and viruses that make contact with the anti-bacterial photocatalytic film. In US, the air ventilation requirement for patient room is six air exchanges per hour per room. Such air ventilation provides sufficient air movement in the patient room and could bring airbome bacteria and viruses to the surface of the overbed fixture. With coated with anti-bacterial photocatalytic film, this overbed lighting fixture becomes effectively an infection-control equipment in the patient room, providing continual anti-bacterial/anti-viral protection for the patient.

[0024] The FIG. 2 is another embodiment of the present disclosure, where the position of the light source 202c is adjustable toward or away from the lens 203c, though a shifting handle 204. When the light source 202c is closer to the lens 203c, the beam angle of light coming out of the lens 203c is wider. When the light source 202c is away from the lens 203c, the beam angle of light coming out of the lens 203c becomes narrower. This feature enables the user to focus or de-focus of the light coming out of the lens 203c as needed.

[0025] The FIG. 3 is yet another embodiment of the present disclosure, where a pair of shutter are used for adjusting the beam angle of the light coming out of the lens 303c. To narrow the beam angle, the shutters are closing up on the lens. To avoid the loss of the light inside the lens on a narrow beam angle, the inside surface of the shutters may be coated with a reflective film such that the light of the light source 302c could bounce off the reflecting material and shine through the lens 303c.

Additional and Alternative Implementation Notes

[0026] Although the techniques have been described in language specific to certain applications, it is to be understood that the appended claims are not necessarily limited to the specific features or applications described herein. Rather, the specific features and examples are disclosed as non-limiting exemplary forms of implementing such techniques.

[0027] As used in this application, the term or is intended to mean an inclusive or rather than an exclusive or. That is, unless specified otherwise or clear from context, X employs A or B is intended to mean any of the natural inclusive permutations. That is, if X employs A; X employs B; or X employs both A and B, then X employs A or B is satisfied under any of the foregoing instances. In addition, the articles a and an as used in this application and the appended claims should generally be construed to mean one or more, unless specified otherwise or clear from context to be directed to a singular form.