JP2017162581A - Indirect illumination device and method for creating projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indirect illumination device capable of being used in a saved space, and having high usability.SOLUTION: An indirect illumination device, according to one embodiment of this invention, includes: a light source therein; a housing provided with an opening part configured to pass illumination light flux from the light source to the outside; and a tabular projector arranged at the opening part. The projector is formed into such a shape that a drawing pattern of a predetermined shape is compressed according to a predetermined algorithm, and arranged at the opening part so as to be orthogonal to the illumination light flux from the light source. A side wall of the housing on a side where the projector is arranged is used to closely contact with a wall surface configured to project a drawing pattern of the projector.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an indirect lighting device, and more particularly to a space-saving indirect lighting device and a projection body that decorates a space by projecting a shadow onto a wall or the like.

  There is known a lighting device that projects a shadow picture on a wall to decorate a living space or an office. For example, Patent Document 1 discloses a technique in which light is irradiated toward a contrast body provided with a contrast pattern on a curved surface, and a shadow image is formed on a shadow projection surface by light and shadow.

JP 2006-302727 A

  However, the illumination device described in Patent Document 1 cannot form a desired shadow image on the projection surface unless the illumination device is installed at a certain distance from the shadow projection surface. Therefore, it cannot be used in a narrow living space where a sufficient space for forming a shadow image cannot be secured, and the usability is lacking.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an indirect lighting device and a projector that have high usability and can be used in a narrow space.

  In order to solve the above-described problem, an indirect lighting device according to one embodiment of the present invention includes a housing including a light source therein and an opening through which an illumination light beam from the light source passes to the outside. And a planar projection body in which a figure of a predetermined shape is formed in a shape compressed by a predetermined algorithm, and the projection body is arranged in the opening so as to be orthogonal to the optical axis of the light source. The side surface of the housing on the side where the is disposed is used in close contact with the wall surface on which a pattern with a predetermined shape is projected.

  Furthermore, in the indirect illumination device according to one aspect of the present invention, the projector forms a pattern with a predetermined shape on the wall surface parallel to the optical axis of the light source by shielding or transmitting at least part of the illumination light beam from the light source. The light beam limiting unit is orthogonal to the length from the shortest distance to the longest distance along the optical axis direction of the symbol of the predetermined shape with respect to the irradiation area of the wall surface by the illumination light beam, and the optical axis direction. The symbol is compressed according to a predetermined algorithm considering the maximum width.

  Furthermore, according to one aspect of the present invention, an illumination light beam from a light source provided inside a housing having an opening is directed directly or indirectly to a wall surface that is orthogonal to the optical axis of the light source. When irradiating, at least a part of the illumination light beam is shielded or transmitted to create a projection body arranged in an indirect illumination device that projects a desired pattern onto the wall surface. The aspect ratio of the desired pattern is set so as to cover at least a part of the opening area, and the desired pattern is projected in advance within the illumination range of the illumination light flux in the vertical and horizontal directions with respect to the wall surface. It is formed from a symbol compressed according to a predetermined algorithm.

  According to one aspect of the present invention, a light source is provided inside, a housing provided with an opening that allows an illumination light beam from the light source to pass outside, and a planar projection body disposed in the opening. The projection body has a shape obtained by compressing a symbol of a predetermined shape according to a predetermined algorithm, and is disposed in the opening so as to be orthogonal to the illumination light beam from the light source, and on the housing on the side where the projection body is disposed. Since the side surface is used in close contact with the wall surface on which the design of the projection body is projected, an indirect lighting device with high usability that can be used in a narrow space can be provided.

(A)-(d) is the schematic of the indirect lighting apparatus by one embodiment of this invention. It is a figure explaining the production method of the projection body by one embodiment of the present invention. (A)-(c) is the schematic explaining an example of the projection body by one embodiment of this invention. (A)-(c) is the schematic explaining an example of the projection body by one embodiment of this invention.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic view of an indirect lighting device according to an embodiment of the present invention, in which FIG. 1 (a) is a top view, (b) is a front view, (c) is a side view, and (d) is a side view. It is the bird's-eye view which looked at the inside. As shown in FIG. 1, the indirect illumination device 10 includes a projection body 11, a housing 12 having an opening, a light source 15, and a fixing pin 14. The housing 12 is made of, for example, wood, polycarbonate or the like and has a thickness of 10 mm. Housed in the housing 12 are a light source 15, a control device 16 for the light source 15, a heat sink (not shown), an indirect illumination device 10, and the like. The bottom surface 13 (surface facing the opening) of the housing 12 is formed in a curved surface, and reflects the irradiation light from the light source 15 and collects it in the opening. As the light source 15, an LED element, an LED bulb, a fluorescent lamp, an incandescent lamp, or the like can be used. The light source 15 is installed inside the housing 12 so that the optical axis direction faces the opening, and an illumination light beam is efficiently emitted from the opening. Note that various sizes of the housing 12 may exist depending on the size of the shadow projected on the wall surface. Further, the light source 15 and the like are shown in a simplified manner and are not limited thereto.

  The projection body 11 is disposed in the opening of the housing 12. The indirect lighting device 10 is used with the surface on which the projection body 11 is arranged in FIG. That is, the indirect illumination device 10 is used by being fixed to the wall surface by the fixing pin 14 in a direction in which the optical axis of the light source 15 is parallel to the wall surface. The projection body 11 is formed by compressing and deforming a symbol of a predetermined shape according to a predetermined algorithm (hereinafter, also referred to as a compressed shape) from a material that blocks the illumination light beam. This compressed shape corresponds to a light beam limiting unit that forms a pattern (shadow) of a predetermined shape on a wall surface parallel to the optical axis of the light source 15 by shielding or transmitting at least part of the illumination light beam from the light source 15. As shown in FIG. 1C, the projection body 11 is formed in a plate shape, and is disposed on the side of the opening of the indirect lighting device 10 that makes the housing 12 in close contact with the wall surface. When the projection body 11 is formed in a plate shape, the material is, for example, acrylic or wood plywood, and is formed with a thickness of about 2 to 5 mm. At this time, the projection body 11 is arranged in the opening so that the optical axis of the light source 15 and the plate-like pattern portion of the projection body 11 are orthogonal to each other. That is, it is arranged at a position that most blocks the illumination light beam from the light source 15. In addition, as the projection body 11, you may implement | achieve what was printed on the transparent sheet | seat, the film, etc. so that the pattern part might become opaque.

  Next, a method for creating the projection body 11 and a usage example of the indirect illumination device 10 will be described. FIG. 2 is a diagram for explaining a method of creating a projection body according to an embodiment of the present invention, and shows a front view and a side view of the indirect illumination device 10. FIG. 3 is a schematic diagram illustrating an example of the projector 11. 3A is a diagram showing a dolphin symbol 20 to be projected on the wall surface, FIG. 3B is a diagram showing a compression shape used for the projection body 11, and FIG. 3C is indirect illumination with the projection body 11 attached thereto. It is an arrangement usage example of the apparatus 10. The compressed shape of the projection body 11 is obtained by inputting information indicating the pattern 20 to a computer and deforming / reducing the image by a predetermined algorithm. The predetermined algorithm is based on the concept of the existing shadow volume method, and is desired for the irradiation area on the wall surface by the illumination light beam (defined by the positional relationship between the opening and the light source 15, the size of the opening, etc.). Is taken into consideration the length from the shortest distance to the longest distance along the optical axis direction and the maximum width orthogonal to the optical axis direction. The shadow volume method calculates the shadow space (shadow volume) generated when an object blocks the light from the light source, and subtracts the shadow space facing away from the shadow space facing from the viewpoint. Thus, the shape of the shadow of the object viewed from the viewpoint is calculated. In the embodiment of the present invention, in the above-described shadow volume method, the direction of the viewpoint toward the wall surface, the light source as the light source 15 of the indirect illumination device 10, the object as the projection body 11, and the shadow shape of the object as viewed from the viewpoint are projected onto the wall surface. The compressed shape of the projection body 11 is calculated with the dolphin symbol 20 being used. Therefore, as input information to the computer, image information of the dolphin symbol 20, coordinate information of the wall surface on which the shadow is projected, coordinate information of the surface on which the projection body 11 is arranged (surface including the opening), coordinate information of the light source 15 Is used.

  That is, as shown in FIG. 2, when the size (ie, projection width and projection height) of the dolphin shadow 23 to be projected on the wall surface 40 is set in advance, the shadow volume in FIG. It is a space that connects the two. Assuming that the projection body 11 is formed at the position of the opening in the shadow volume, the aspect ratio of a predetermined pattern is compressed by a predetermined algorithm. The image to be input to the computer is not limited to the black image as shown in FIG. 2 but may be two-dimensional data in which the shadow portion is “1” and the other portions are “0”.

  For example, in the case of the dolphin symbol 20 in FIG. 3A, the compression shape of the projection 11 calculated by the above algorithm is the compression shape 21 in FIG. 3B. When the indirect illumination device 10 equipped with the projection body 11 having the compressed shape 21 is arranged on the wall surface and the light source 15 irradiates the projection body 11 with light, a shadow picture 23 is projected as shown in FIG.

  FIG. 4 is another example of a pattern projected on the wall surface. The balloon pattern 30 shown in FIG. 4A includes a black portion that blocks light and a transparent portion that transmits light. Thus, when creating a projected body of a pattern including a transparent portion, it is preferable that the compressed shape 31 is printed on a transparent film or flat plate. In addition, in FIG.4 (c), although the projection body 32 on a flat plate is shown, when the projection body 32 is formed with a transparent film, a film is attached so that the opening part of the indirect illumination device 10 may be covered, At that time, the projection body 11 may be arranged in the indirect lighting device 10 so that the compressed shape 31 is located on the side surface of the casing that is in close contact with the wall surface on which the shadow is projected. When light is emitted from the light source 15 of the indirect lighting device 10, a shadow picture 33 is projected onto the wall surface as shown in FIG.

  As described above, according to an embodiment of the present invention, it is possible to realize an indirect illumination device that can project a desired shadow picture in a state of being in close contact with a wall surface on which the shadow picture is projected. Therefore, it is not necessary to separate the indirect lighting device 10 from the wall as in the prior art, and a space saving and high usability indirect lighting device can be provided. Moreover, there is no restriction | limiting in the design to project on a wall surface, The shadow picture of a desired design can be projected on a wall surface. Further, by allowing the projection body 11 to be attached and detached, it is possible to freely select a projected picture.

  The present invention is not limited to the embodiment described above. For example, the shape of the housing 12 does not have to be close to a rectangular parallelepiped as shown in the figure, and may be a hemispherical shape as long as the light beam from the light source accommodated in the housing 12 can be efficiently collected on the projection body. , Cylindrical or spherical.

  In the above description, a mode in which a transparent film or a flat plate is used as the projector has been described. However, a liquid crystal display that transmits light may be used as the projector, and the shape displayed on the liquid crystal display may be changed. Thereby, it is possible to move the shadow projected on the wall surface. In this case, for example, as a smartphone application, on the liquid crystal display, a picture drawn by the user on the smartphone is converted into the shape of the projection body by the above algorithm, and the picture drawn by the user is projected onto the wall surface. Is also possible.

  Furthermore, in the above description, only the shadow of the black shadow has been described. However, a colored shadow picture can be projected by using a colored transparent or translucent film or flat plate or a colored light source as the projecting body. In addition, a shaded shadow can be projected onto the wall surface by changing the light shielding rate of the projection body (that is, changing the thickness, or changing the type of ink to be printed and the method of painting).

  Moreover, although the case where the number of light sources is one was demonstrated above, light may be irradiated from a some light source with respect to one projection body, and a some shadow may be projected on a wall surface. Further, a plurality of light sources may be housed inside the housing.

  Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, the functions included in each means, each step, etc. can be rearranged so that there is no logical contradiction, and a plurality of means, steps, etc. can be combined or divided into one. . The structures described in the above embodiments may be combined as appropriate.

DESCRIPTION OF SYMBOLS 10 Indirect illumination apparatus 11 Projector 12 Housing | casing 15 Light source 14 Fixing pin 16 Control apparatus 13 Bottom face 20 Pattern 21 Shape 23 Shadow 30 Pattern 31 Shape 32 Projector 33 Shadow 40 Wall surface

Claims (3)

A housing provided with a light source inside, and provided with an opening for passing the illumination light beam from the light source to the outside,
A planar projection body arranged in the opening and formed into a shape in which a pattern of a predetermined shape is compressed by a predetermined algorithm;
With
The projector is disposed in the opening so as to be orthogonal to the optical axis of the light source,
An indirect lighting device that is used by bringing a side surface of a housing on which the projection body is disposed into contact with a wall surface on which the pattern having the predetermined shape is projected. The projection body includes a light beam limiting unit that forms a pattern with a predetermined shape on a wall surface parallel to the optical axis of the light source by shielding or transmitting at least part of the illumination light beam from the light source,
The light flux limiting unit has a length from the shortest distance to the longest distance along the optical axis direction of the pattern of the predetermined shape, and a maximum width perpendicular to the optical axis direction, with respect to an irradiation area of the illumination light beam on the wall surface. The indirect lighting device according to claim 1, wherein the symbol is compressed in accordance with a predetermined algorithm in consideration of the above. When irradiating an illumination light beam from a light source provided inside a housing having an opening portion directly or indirectly toward a wall surface perpendicular to the optical axis of the light source, at least the illumination light beam A method of creating a projection body arranged in an indirect illumination device that projects a desired pattern onto the wall surface by shielding or transmitting a part thereof,
The projector is
The desired pattern is formed so as to block at least a part of the opening area of the opening, and the desired pattern is projected in advance in an illumination range in the vertical and horizontal directions with respect to the wall surface of the illumination light beam. A method of creating a projection body, which is formed from a pattern obtained by compressing the aspect ratio of the image according to a predetermined algorithm.

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