JP2009139757A - Image output device capable of enlarged projection - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image output device which can be made compact and which can view the image of a projected object from various angles. <P>SOLUTION: The image output device includes 100 which is opened at the predetermined portion of a side wall, a Fresnel lens 10 which is installed in the opened portion of the housing, a base which is installed inside the housing to allow an object 1 to be placed thereon, an illumination means for illuminating the base, and a convex lens 30 which is located between the base and the Fresnel lens and is installed such that the image of the object placed on the base is viewed at a projection position outside the Fresnel lens. The base includes a driving gear 22 which is rotated by a motor 23, a driven gear 21 which is rotated by rotation of the driving gear, and a rotation plate 20 which is rotated by rotation of the driven gear. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an image output device for outputting an image of an object using a lens, and relates to an image output device capable of enlarging projection.

Explanation of related technology

  Lenses used in various image output apparatuses are usually formed by polishing one or both surfaces of a transparent material such as glass or plastic to form a curved surface. These lenses are roughly classified into convex lenses and concave lenses. The convex lens is made thicker at the center than at the end, and has a function of outputting an enlarged image of the target object.

  The Fresnel lens was developed by cutting off a part of the lens surface on the side where the focal point of the convex lens is formed. This Fresnel lens has a flat shape and functions in the same way as a convex lens. Fresnel lenses are used in televisions and lighthouses.

  An image output device using a Fresnel lens is arranged at a predetermined distance from an object so that a person can see an enlarged image of the object formed on the Fresnel lens. In this image output apparatus, the distance between the object and the Fresnel lens directly affects the size of the entire image output apparatus.

In order to reduce the size of the image output device, as shown in FIG. 1, the reflector 3 is used so that the traveling distance D1 + D2 of the light forming the image from the object 1 to the Fresnel lens 2 can be extended. A structure in which a mirror (such as a mirror) is disposed between the object 1 and the Fresnel lens 2 has been proposed. In this structure, the Fresnel lens 2 is provided on a predetermined portion of the side wall of the housing 4. In the housing 4, a base 5 on which the object 1 is placed is disposed. Further, in the housing 4, a reflector 3 for reflecting the image of the object 1 to the Fresnel lens 2 is disposed at an appropriate position. In the housing 4, a space for accommodating the base 5 and a space for accommodating the reflector 3 are formed separately from each other. That is, in the housing 4, two partition walls for forming a space for housing the base 5 and a space for housing the reflector 3 are provided at a predetermined interval. are each as traveling path of light forming the image of the object 1 is not blocked, the grooves 4 ₁ and 4 ₂ are formed.

  An image output apparatus using the Fresnel lens 2 has an advantage that the size of the apparatus can be reduced. However, since the total travel distance of the light that forms the image of the target object 1 is always constant, there is a limit to downsizing this device. In addition, the image of the target object 1 cannot be seen from various angular positions.

  Therefore, the present invention has been made to solve the problems in the related art described above, and therefore the object of the present invention is to be able to reduce the size and to project the image of the projected object in various angular positions. It is an object of the present invention to provide an image output apparatus that enables viewing from the viewpoint.

  In order to achieve the above object, according to an aspect of the present invention, an image output apparatus as described below is provided. The image output apparatus includes a housing in which an opening is provided in a predetermined portion of a side wall, a Fresnel lens provided in the opening of the housing, and a housing on which the object can be placed. So that an image of the object placed on the base can be seen at a projection location outside the Fresnel lens. An image output device having a convex lens provided between the base and the Fresnel lens, wherein the base is rotated by a motor, a driven gear, and a driven gear rotated by the rotation of the driving gear; And a rotating plate that is rotated by rotation of the driven gear.

  In another aspect of the present invention, the image output device further includes a distance sensor provided outside the housing to sense a separation distance from a viewer, and the lens for moving the lens. Lens moving means provided inside the housing; and control means for receiving information from the distance sensor and controlling the operation of the lens moving means.

  In still another aspect of the invention, the lens moving means includes a motor that operates in response to a control signal from the control means, a worm that is connected to the motor so as to be rotated by the motor, and a lens support plate. And a worm wheel meshed with the worm so as to move linearly by the rotation of the worm.

  In still another aspect of the present invention, a groove having a length corresponding to the length of the worm is formed on the inner surface of the housing opposite to the lens moving means. The image output device further includes auxiliary moving means having at least one roller disposed in the groove so as to rotate in the same direction as the moving direction of the lens moving means, and the other end of the lens support plate. And a moving plate connected and disposed on the roller.

  The foregoing objects and other features and advantages of the present invention will become more apparent upon reading the following detailed description in conjunction with the accompanying drawings.

Detailed Description of the Preferred Embodiment

  Hereinafter, preferred embodiments of the present invention shown in the accompanying drawings will be described in detail. Throughout the drawings and detailed description, the same or similar parts are denoted by the same reference numerals as much as possible.

  FIG. 2 is a cross-sectional view showing an image output apparatus capable of enlarging projection according to an embodiment of the present invention.

  With reference to FIG. 2, in the image output apparatus according to this embodiment of the present invention, the Fresnel lens 10 is provided in an opening provided on the side wall of the housing 100. A protective layer 11 made of glass or the like is formed on the outer surface of the Fresnel lens 10 in order to protect the Fresnel lens 10.

  A rotating plate 20 on which the object 1 is placed and rotated is placed on a portion of the housing 100 opposite to the Fresnel lens 10. The lens 30 is disposed between the object 1 and the Fresnel lens 10. The lens 30 is preferably composed of a convex lens.

The light that forms the image of the target 1 that has passed through the lens 30 is refracted at the focal point P and enters the Fresnel lens 10. At this time, the output image 1 ′ of the object 1 is output at a distance D _Z + d. This distance D _Z + d is longer than the actual distance D _Z between the object 1 and the Fresnel lens 10. That is, when the first distance D _X and the second distance D _Y changes, also changes the projection distance d of the output image 1 'is projected to the outside of the Fresnel lens 10. Here, the first distance D _X is the distance between the object 1 and the lens 30, and the second distance D _Y is the distance between the lens 30 and the Fresnel lens 10. In the present invention, since the image of the target 1 passes through the convex lens, the output image 1 ′ is output in an enlarged state as compared with the target 1.

  The lens 30 is fitted into an opening formed in the central portion of the lens support plate 31. Since both ends of the lens support plate 31 are connected to the inner surface of the housing 100, the lens 30 can be provided in a stable state with respect to the inner surface of the housing 100.

  On the other hand, under the rotating plate 20, a driven gear 21 for rotating the rotating plate 20, a driving gear 22 meshed with the driven gear 21, and a motor 23 for rotating the driving gear 22 are arranged. Has been. The operation of the motor 23 is controlled by a control device (not shown) disposed outside the housing 100.

  Unlike the conventional image output apparatus that can see the projected image only from one direction, the projected image can be seen from various angular positions by rotating the rotating plate 20. In other words, not only the front surface of the object 1 but also the side surfaces and the rear surface thereof can be seen.

  FIG. 3 is a cross-sectional view showing another embodiment of the present invention. The same reference numerals are used for the same parts as those of the apparatus shown in FIG. 2, and detailed descriptions thereof are omitted here.

  Referring to FIG. 3, the image output apparatus according to this embodiment of the present invention is near the upper part of the side wall of the housing 100 in which the Fresnel lens 10 is provided in order to sense the separation distance between the Fresnel lens 10 and the viewer. The lens moving means provided at the upper end of the lens support plate 31 to move the distance sensor 50, the control unit 60, and the lens support plate 31 and thereby change the position of the lens 30 70.

  The illumination means 40 for illuminating the object 1 is provided inside the housing 100 of the image output apparatus. The illumination means 40 can be provided above or below the place where the object 1 is placed. In this regard, the rotating plate 20 on which the object 1 is placed and rotated is preferably formed of a transparent material such as glass.

  The control unit 60 controls the moving distance of the lens moving means 70 in accordance with the distance information sent from the distance sensor 50.

  The lens moving means 70 is connected to the motor 71, the worm 73 connected to the motor 71 so as to be rotated by the motor 71, and the upper end of the lens support plate 31 via the connecting member 74. And a worm wheel 75 meshed with the worm 73 so as to move. The worm 73 is disposed in a groove 76 that forms a predetermined space in the housing 100. Reference numeral 72 denotes a worm shaft.

  3, in the image output apparatus according to the present embodiment, in order to ensure the ease of movement of the lens support plate 31, auxiliary movement means 80 is further provided at the lower end of the lens support plate 31 (lens movement means 70 is provided. The lens support plate 31 can be provided on the opposite side of the upper end of the lens support plate 31.

  In the auxiliary moving means 80, a groove portion 81 having a length corresponding to the length of the worm 73 is formed on the inner surface of the housing 100 opposite to where the lens moving means 70 is disposed. At least one roller 82 is provided in the groove 81 so as to rotate in the same direction as the moving direction of the lens moving means 70. The roller 82 is connected to the roller support portion 83 by a roller pin 84. A moving plate 86 fixed to the lens support plate 31 via the connecting member 85 is disposed on the roller 82. The guide part 87 is formed so as to stably support and guide the movement of the moving plate 86. In order to ensure ease of movement of the moving plate 86, a plurality of auxiliary rollers 88 are provided in the guide portion 87.

  In order to move the lens 30, at least one lens moving means 70 and at least one auxiliary moving means 80 can be connected to the lens support plate 31. For example, the lens moving means 70 can be connected to one end of the lens support plate 31 having a rectangular plate shape, and the auxiliary moving means 80 can be connected to the other end of the lens support plate 31. Alternatively, the lens moving means 70 can be connected to one surface of the lens support plate 31 and the auxiliary moving means 80 can be connected to the other surface of the lens support plate 31.

  As is apparent from the above description, the present invention has the advantage that the image output apparatus can be further reduced in size.

  Also, by changing the lens position, the projection distance of the output image projected outside the Fresnel lens can be changed, and the projected image can be viewed from various angular positions.

  While preferred embodiments of the present invention have been described for purposes of illustration, those skilled in the art will recognize that the invention is susceptible to various modifications, additions, and departures without departing from the scope and spirit of the invention as set forth in the appended claims. It will be understood that substitutions can be made.

It is sectional drawing which shows the conventional image output apparatus using a Fresnel lens. 1 is a cross-sectional view showing an image output apparatus capable of enlarging projection according to an embodiment of the present invention. It is sectional drawing which shows the image output apparatus which can carry out the expansion projection which concerns on another embodiment of this invention.

Claims (4)

  A housing provided with an opening in a predetermined portion of the side wall, a Fresnel lens provided in the opening of the housing, and an interior of the housing so that an object can be placed thereon. The base and the Fresnel lens so that an image of the object placed on the base, illumination means for illuminating the base, and the object placed on the base can be seen at a projection location outside the Fresnel lens An image output device having a convex lens disposed between the base and the base, wherein the base is a drive gear rotated by a motor, a driven gear rotated by rotation of the drive gear, and rotation of the driven gear. And a rotating plate that is rotated.   Further, a distance sensor provided outside the housing for sensing a separation distance from a viewer, a lens moving means provided inside the housing for moving the lens, and the distance The image output apparatus according to claim 1, further comprising a control unit that receives information from the sensor and controls an operation of the lens moving unit.   The lens moving means is connected to a motor that operates in response to a control signal from the control means, a worm connected to the motor so as to be rotated by the motor, and one end of a lens support plate. The image output device according to claim 2, further comprising: a worm wheel meshed with the worm so as to move linearly by rotation. A groove having a length corresponding to the length of the worm is formed on the inner surface of the housing opposite to the lens moving means;
The image output device further includes auxiliary moving means having at least one roller disposed in the groove so as to be rotated in the same direction as the moving direction of the lens moving means, and the other end of the lens support plate. The image output apparatus according to claim 2, further comprising a moving plate that is connected and disposed on the roller.

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