Indoor illuminator for adjusting lighting field

An indoor illuminator for adjusting lighting field includes a casing, two adjusting portions and two illuminating strips. The casing has a top plate and two side plates. Each adjusting portion includes a bottom plate and a base plate. The base plate is mounted on the bottom plate. The two illuminating strips are respectively and correspondingly disposed on the two adjusting portions. Each illuminating strip includes an elongated loading plate and an elongated positioning plate. The loading plate has multiple light emitting diodes mounted on the loading plate. The positioning plate is respectively connected with the loading plate and the base plate of a corresponding adjusting portion to be enclosed as a triangular tube. The loading plate is pivotable relative to the base plate such that a projecting angle of the loading plate is adjustable and the lighting field is adjustable.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a lighting device, and more particularly to an indoor illuminator for adjusting lighting field.

2. Description of Related Art

A conventional indoor lighting device integrates multiple light emitting diodes into a single illuminating unit and multiple illuminating units are arranged in an indoor space. The indoor space is equally divided into multiple identical sections. The illuminator units are distributed among the identical sections as a matrix arrangement to provide demanded illuminations.

However, the construction of the office building or the manufactory is complex and the indoor space in the office building or the manufactory is divided into multiple compartments. Therefore, the matrix arrangement of the illuminator units cannot work on the office building or the manufactory. With reference toFIG. 16, multiple conventional illuminating units90are arranged in a space. Each conventional illuminating unit90provides a quantitative lighting field and a quantitative luminous flux. When each conventional illuminating unit90provides a smaller projecting angle and a projected area of the conventional illuminating unit90is decreased, the quantitative luminous flux in each basic unit of the projected area is increased, such that the organs of human visual perceptions will be easily injured. When each conventional illuminating unit90provides a larger projecting angle and the projected area of the conventional illuminating unit90is increased, multiple dark ripples are formed in the space and each dark ripple is located between adjacent two projected areas, such that the organs of human visual perceptions will feel uncomfortable. If more conventional illuminating units are used to solve the dark ripples, the redundant illumination will be projected on the walls and be wasted.

To overcome the shortcomings, the present invention tends to provide an indoor illuminator for adjusting lighting field to mitigate or obviate the aforementioned problems.

SUMMARY OF THE INVENTION

The main objective of the invention is to provide an indoor illuminator for adjusting lighting field that includes a casing, at least two adjusting portions and at least two illuminating strips. The casing has a top plate and at least two side plates. The top plate is provided for reflecting function. The at least two side plates respectively extend from a periphery of the top plate. The at least two adjusting portions are respectively and correspondingly disposed on the at least two side plates. Each adjusting portion includes a bottom plate and a base plate. The bottom plate is connected with a corresponding side plate. The base plate is mounted on the bottom plate. The at least two illuminating strips are respectively and correspondingly disposed on the at least two adjusting portions. Each illuminating strip includes an elongated loading plate and an elongated positioning plate. The loading plate has multiple light emitting diodes mounted on the loading plate. The positioning plate is respectively connected with the loading plate and the base plate of a corresponding adjusting portion along two elongated sides of the positioning plate to be enclosed as a triangular tube. The base plate of each adjusting portion is elongated and has multiple protrusions protruding from the base plate and aligned along a width of the base plate for selectively abutting against the positioning plate of a corresponding illuminating strip for adjusting an angle of the loading plate relative to the base plate. The bottom plate of each adjusting portion is bendable relative to the corresponding side plate, which is connected with the bottom plate.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENT

With reference toFIGS. 1 to 4, an indoor illuminator for adjusting lighting field in accordance with the present invention comprises a casing10, two adjusting portions20and two illuminating strips30.

The casing10is stamped from a metal sheet and includes a rectangular top plate11and two side plates12. The top plate11is formed of a reflective material, such as metal or glass mirror, for reflecting the light beams emitted from the illuminating strips30. The two side plates12are respectively formed on two opposite ends of a periphery of the top plate11and extend downward. A space is defined between the two side plates12. The light beams reflected from the top plate11pass through the space.

With further reference toFIG. 5, the two adjusting portions20are respectively disposed on the two side plates12. Each adjusting portion20includes a bottom plate21and a base plate22. The bottom plate21of each adjusting portion20extends inwardly from a corresponding side plate12. Each bottom plate21has a recess211defined in the top surface of the bottom plate21. The base plate22of each adjusting portion20is mounted in the recess211in the bottom plate21.

The two illuminating strips30are respectively disposed on the two adjusting portions20. Each illuminating strip30includes an elongated loading plate31and an elongated positioning plate32. The loading plate31of each illuminating strip30has multiple light emitting diodes311mounted on the loading plate31. Preferably, each light emitting diode311has a wavelength between380and780nanometers. The light emitting diodes311of each loading plate31are equally arranged along a length of the loading plate31for providing a uniform quantitative luminous flux. The positioning plate32of each illuminating strip30is respectively connected with the loading plate31and the base plate22of a corresponding adjusting portion20along two elongated sides of the positioning plate32to form a triangular tube by the plates22,31and32. Preferably, the base plate22of each adjusting portion20, the loading plate31and the positioning plate32of a corresponding illuminating strip30are integrally formed and folded from a plane sheet. The base plate22of each adjusting portion20has a width greater than those of the loading plate31and the positioning plate32of the corresponding illuminating strip30.

With reference toFIG. 1, the adjusting portion20is provided for adjusting an emitting angle of the light emitting diode311of the loading plate31of the corresponding illuminating strip30relative to the base plate22. Preferably, the base plate22of each adjusting portion20is elongated and has three protrusions23protruding from the base plate22and arranged along a width of the base plate22for selectively abutting against the positioning plate32of the corresponding illuminating strip30and adjusting an angle of the loading plate31relative to the base plate22.

The light emitting diodes311of the two illuminating strips30are provided for emitting light beams toward the top plate11and the top plate11reflects the light beams to pass through the space between the two side plates12.

With reference toFIG. 5, when the positioning plate32of one of the two illuminating strips30abuts against the protrusion23, as the positioning plate32is adjacent to the loading plate31, the loading plate31is pivoted relative to the base plate22such that the loading plate31has a higher inclination. An angle of the light beams emitted by the light emitting diodes311on the loading plate31relative to a normal line of the top plate11is increased and the projective area of the top plate11is also increased and is scattered to generate a greater lighting field. With reference toFIGS. 6 and 7, when the positioning plate32abuts against the protrusion23, which is away from the loading plate31, the loading plate31is pivoted relative to the base plate22such that the loading plate31has a lower inclination. The angle of the light beams emitted by the light emitting diodes311on the loading plate31relative to the normal line of the top plate11is decreased and the projective area of the top plate11is also decreased and is concentrated to generate a smaller lighting field.

With reference toFIGS. 8 and 9, in a second embodiment of the indoor illuminator in accordance with the present invention, the elements and effects of the second embodiment are same with the first embodiment except the bottom plate21of each adjusting portion20is bendable relative to the side plate12. When the bottom plate21is upwardly bended, the angle of the light beams emitted by the light emitting diodes311on the loading plate31of the corresponding illuminating strip30relative to the normal line of the top plate11is increased and the projective area of the top plate11is also increased and is scattered to generate a greater lighting field. When the bottom plate21is downwardly bended, the angle of the light beams emitted by the light emitting diodes311on the loading plate31relative to the normal line of the top plate11is decreased and the projective area of the top plate11is also decreased and concentrated to generate a smaller lighting field.

The shape of the top plate11is variable for providing various lighting fields with various results. With reference toFIG. 4, the top plate11is a flat mirror. With reference toFIG. 10, the top plate11is a parabolic mirror. With reference toFIG. 11, the top plate11is a spherical mirror. With reference toFIG. 12, the top plate11is a hyperbolic mirror. With reference toFIG. 13, the top plate11is an ellipsoidal mirror. With reference toFIG. 14, the top plate11is a multi-micro-structural mirror. Therefore, the top plate11is chosen from the flat mirror, the parabolic mirror, the spherical mirror, the hyperbolic mirror, the ellipsoidal mirror and the multi-micro-structural mirror.

With reference toFIG. 15, in a third embodiment of the indoor illuminator in accordance with the present invention, the elements and effects of the third embodiment are same with the first embodiment except that four side plates12respectively extend from the top plate11. Four adjusting portions20are respectively mounted on the four side plates12. Four illuminating strips30are respectively disposed on the four adjusting portions20.

Each adjusting portion20of the present invention is provided for adjusting the emitting angle to change the lighting field. The indoor illuminator in accordance with the present invention can be suitable for a different indoor arrangement and provide a uniform illumination. For example, the light in front of a projector can be decreased or turned off and the light in back of the projector is normal. Therefore, the indoor illuminator in accordance with the present invention is suitable for different environmental requirements. The base plate22of each adjusting portion20, the loading plate31and the positioning plate32of the corresponding illuminating strip30are integrally formed and simply folded from the plane sheet. The light emitting diodes311are pre-mounted on the loading plate31. A glare of the indoor illuminator in accordance with the present invention can be controlled to a reasonable range and avoid causing multi-shadows, such that there is no necessity to mount an additional diffusion sheet on the present invention. The structure of the present invention is simplified. The manufacture of the present invention is easy and the manufacturing cost can be decreased.