JP2003348416A - Magnification display apparatus using digital camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnification display apparatus using a digital camera at a low cost and permitting downsizing. <P>SOLUTION: The magnification display apparatus is provided with a slide plate 2a at its lower end so as to be slidable on a book (a), and comprises: a support member 7 for supporting a magnification optical system unit 6 including a magnification lens 22 to magnify a display object (b) of the book (a); the digital camera 8 fitted to the support member 7, for imaging the display object (b) magnified via a magnification optical system unit 6 and converting the image into a digital signal; a support leg 9 for maintaining the support member 7 in a stood upright state; and a monitor 11 connected electrically to the digital camera 8 and for displaying image data sent from the digital camera 8 as an image. The digital camera 8 and the monitor 11 on market can be available for the magnification display apparatus. Since the magnification display apparatus is provided with the magnification optical system 6, it is possible to locate the digital camera 8 at a position not giving hindrance to a user. <P>COPYRIGHT: (C)2004,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an enlarged display device for assisting visual acuity in reading or writing, and more particularly to a device using a digital camera.

[0002]

2. Description of the Related Art Conventionally, an enlarged display device for assisting visual acuity during reading includes a document table placed on a desk or the like,
A television camera mounted on a base plate provided above a plurality of columns so as to be located above the document table, and a document (electrically connected to the television camera) placed on the document table and displayed on the document table. And a monitor that magnifies and displays the characters in the document.

[0003]

The above-mentioned conventional enlarged display device has a problem that it is difficult to reduce the size of the television camera because the television camera is large and heavy. In addition, the operation to guide the optical axis of the TV camera to the display target of characters and figures on the original is difficult and troublesome, and when writing, it is necessary to use both hands because it has a writing implement in one hand However, there is a problem that the optical axis guiding operation is more difficult. An object of the present invention is to solve these problems, and an object of the present invention is to provide an enlarged display device using a digital camera that solves the problems.

[0004]

In order to achieve the above object, according to the present invention, there is provided a support member which is slidable in a standing state on a material to be displayed, and supported by the support member. A digital camera that captures an enlarged image of a display target of the displayed material and converts the image into a digital signal; and a monitor that is electrically connected to the digital camera and that displays image data transmitted by the digital camera as an image. Things.

According to a second aspect of the present invention, there is provided a magnifying optical system including a slide plate at a lower end so as to be slidable on the material to be displayed, and a magnifying lens for enlarging a display target of the material to be displayed. A supporting member, a digital camera attached to the supporting member, for taking an image of the displayed material enlarged via the magnifying optical system, and converting the image into a digital signal; and for maintaining the supporting member in an upright state. It comprises a support leg and a monitor that is electrically connected to the digital camera and displays image data transmitted by the digital camera as an image.

Further, according to a third aspect of the present invention, in the magnifying optical system according to the second aspect, the first reflecting mirror for horizontally reflecting an image to be displayed on a side opposite to a user side. A second reflecting mirror for reflecting the image reflected by the first reflecting mirror in a horizontal direction that matches the optical axis of the digital camera, and a magnifying lens arranged so that the optical axis matches the digital camera. It is characterized by having done.

According to a fourth aspect of the present invention, in addition to the configuration of the second or third aspect, the support legs are formed as a pair, and their upper ends are provided at predetermined positions of the support member. It is rotatably displaceable in the horizontal direction and pivotally supported so that the position can be fixed, and the legs are opened diagonally outward from the support member downward,
The digital camera is detachably attached to the support member, and can be displaced in the direction of approaching / separating with the magnifying lens of the magnifying optical system, and can be horizontally moved. It is characterized in that it can be displaced in the direction and in the vertical direction.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described in detail with reference to FIGS. Here, FIG. 1 is a perspective view showing a use state in which a book is displayed, FIG. 2 is a front view showing a use state in which a map having a large area is displayed, FIG. 3 is a side view of FIG.
Is a plan view of the same.

As shown in FIGS. 1 to 4, an enlarged display device 1
Is provided with a slide plate 2 having a flat back surface at the lower end so as to be slidable on the display target surface of the book a, which is a material to be displayed, and an image of a character b which is a display target described in the book a. The vertical ray 3a is refracted from the upward reflected rays, and the first horizontal ray 3b is at right angles to the optical axis of the lens 8a of the digital camera 8 attached at a predetermined position and goes to the opposite side to the user side. Reflecting mirror 4 for refracting the first horizontal light beam 3b
A second reflecting mirror 5 for converting the second horizontal light beam 3c toward the lens 8a of the second lens 8a, and a magnifying optical unit 6 having a magnifying optical system including a magnifying lens 22 for magnifying an image provided in a housing at a predetermined height. And a support member 7 that supports the first and second members. The enlarged display device 1 is mounted on the support member 7 sideways so that the second horizontal light beam 3c from the magnifying lens 22 and the optical axis thereof coincide with each other, and receives the second horizontal light beam 3c. A digital camera 8 for converting an enlarged image of the character b into a digital signal, a support leg 9 for maintaining the support member 7 in an upright state, and a digital line electrically connected to the digital camera 8 via a signal line 10. A monitor 11 for projecting the image data transmitted by the camera 8 as an image.

As shown in FIGS. 1 and 2, the supporting member 7 is formed of a plate, and the lower edge in the upright state is bent so that the back surface is flat, and the tip on the user side is raised to be inclined. Part 2
The slide plate 2 on which a is formed is provided, and on one side thereof,
A housing of the magnifying optical unit 6 having a mounting portion 12 for mounting the digital camera 8 and a light beam passage hole 14 provided on the other surface side corresponding to the digital camera 8 mounted on the mounting portion 12 is provided. Fix with screws 13 and attach. In addition, near the lower end of the support member 7, a handle hole 15 for a user to move the support member 7 with his / her hand.
Is provided.

As shown in FIGS. 1 to 4, an attachment portion 12 for attaching the digital camera 8 to the support member 7 is formed of a plate having a central portion bent at a right angle. The mounting portion fixing screw 17 passed through a horizontally long hole 18 (see FIGS. 2 and 3) of the support member 7 is movable to a vertical portion 16a which is detachably fixed by a fixing screw 17. A vertically long hole 19 (see FIG. 3) that can be inserted in the longitudinal direction is provided, and four horizontal long holes 20 extending in the optical axis direction of the magnifying lens 22 are arranged in parallel at a predetermined interval in the horizontal portion 16b. Become. This horizontal portion 16b
When the vertical portion 16a is fixed to the support member 7 as described above, the digital camera 8 is in a horizontal state,
The optical axis of a and the optical axis of the magnifying lens 22 are placed so as to correspond to predetermined horizontal slots 20, and a camera fixing screw 21 is inserted into the predetermined horizontal slots 20, and the bottom of the digital camera 8 is inserted. The digital camera 8 is fixed by screwing into the female screw hole 8b provided. The mounting portion 12 is capable of displacing the mounting portion fixing screw 17 in the horizontal direction along the horizontally long hole 18 by loosening the mounting portion fixing screw 17.
In addition, since the optical axis of the lens 8 a of the digital camera 8 can be accurately aligned with the optical axis of the magnifying lens 22 because the optical axis of the digital camera 8 can be displaced in the vertical direction along the elongated hole 19.

As shown in FIGS. 1 to 4, the magnifying optical unit 6 has a housing in the form of a deformed box with an open bottom.
The first reflecting mirror 4, which is tilted upward at an angle of 45 degrees toward the back side, which is the opposite side, is disposed on the near side (left side in FIG. 1 or 3) when viewed from the position of the user. A second reflecting mirror 5 erected at an angle of 45 degrees with respect to the lens 8a of the digital camera 8 and the first reflecting mirror 4 is located on the far side when viewed.
Is arranged. With the first and second reflecting mirrors 4 and 5 and the magnifying lens 22 arranged as described above, the character b image to be displayed in the book a is captured as an enlarged erect image by the digital camera 8 as described above. It becomes possible. As the magnifying lens 22, a lens whose focal point coincides with the total distance from the display target surface of the book a is used. In this embodiment, a lens having a focal depth of 240 mm is used.

As shown in FIGS. 1 to 4, a pair of support legs 9 for maintaining the support member 7 in an upright state has a threaded hole 23a at one end of the rod, and a direction in which the rod extends. Is provided with a fixing inclined piece 23 bent at a predetermined angle, and a slide ball 24 provided at the other end. On the other hand, on both sides of the support member 7,
A fixing plate 26 having an insertion hole 26a into which the support leg fixing screw 25 is inserted is provided at the upper end on the far side as viewed from the user side. Then, the support leg 9 is fixed to the support member 7 by applying the fixing inclined piece 23 of the support leg 9 to the lower surface of the fixing plate 26 and screwing the support leg fixing screw 25 into the screw hole 23a. Attach. The support leg 9 thus attached can be horizontally displaced by loosening the support leg fixing screw 25, and can be fixed in position by tightening the support leg fixing screw 25. The above-mentioned position is fixed in the inclined open state, and each of the slide balls 24 as the lower ends of the support legs 9 and the slide plate 2 as the lower end of the support member 7 maintain the support member 7 in the upright state. Provides three-point support.

The enlarged display device 1 configured as described above is
When not in use, the support member 7 and the digital camera 8
And the monitor 11 is not in a separated state.
As shown by a chain line in FIG. 3 and FIG. 4, the sliding ball 24 is displaced so as to be located at the position corresponding to the inclined portion 2a of the slide plate 2 of the support member 7, thereby forming a so-called folded state. The support member 7, the digital camera 8 and the monitor 11 are housed in a case (not shown), and can be carried by hand if necessary. A commercially available digital camera 8 can be used, and a battery is used as the power supply. However, if necessary, the digital camera 8 may be taken in from a household outlet via an AC adapter, and the monitor may be a commercially available television. It is possible to use a receiver. In particular, it is also possible to use an old digital camera 8 or a television receiver which is in stock.

Next, when setting the enlarged display device 1, first, the support leg fixing screw 25 of the connecting portion between the support member 7 and the support leg 9 is loosened, and the support leg 9 is moved from the state shown by the chain line in FIGS. After the horizontal rotation in the state of the solid line, the support leg fixing screw 25 is tightened to bring the support member 7 into an upright state in a state where the legs are appropriately opened (see FIG. 4). Next, the digital camera 8 is mounted on the mounting portion 12, and the horizontal elongated hole 20 is selected so that the lens 8a and the light passage hole 14 coincide with each other. 8b, the digital camera 8 is fixed to the mounting portion 12, and the mounting portion fixing screw 17 is loosened to be displaced in the horizontal direction along the horizontally long hole 18 or displaced in the vertical direction along the vertically long hole 19. Then, the optical axis of the lens 8 a of the digital camera 8 is accurately positioned to correspond to the optical axis of the magnifying lens 22. Subsequently, the digital camera 8 and the monitor 1
1 are electrically connected by a signal line 10. The monitor 11 is located at a position where the user can easily view the screen, for example,
The book a to be displayed is placed at an appropriate position on the desk where the book a is placed.

In the enlarged display device 1 set as described above, the user places the slide plate 2 of the support member 7 on the book a and positions the character b to be displayed on the left side of FIG. 1 or FIG. The support member 7 is slid on the book a by placing a hand on the handle circular hole 15 so that the center of the first reflecting mirror 4 of the magnifying optical system unit 6 is located right above. FIG.
As shown in the figure, the vertical ray 3a forming the image of the letter "B" of the letter b is refracted by the first reflecting mirror 4 to become a horizontal ray 3b, and this horizontal ray 3b is refracted by the second reflecting mirror 5. Then, the light becomes a horizontal light beam 3c directed to the lens 8a of the digital camera 8. Then, the character "B" formed by the horizontal ray 3c is magnified through the magnifying lens 22 and enters the lens 8a in an upright state. It is projected. Also, even if the support member 7 is slid as described above, the light beams 3a and 3
b, since the total distance through which the light beam 3c passes is unchanged, the digital camera 8 is always in focus.

The present invention is not limited to the above embodiment. For example, when the material to be displayed is a map having a large area, the support leg 9 may be used with the support leg 9 mounted on the map. Good.

[0018]

As described above, according to the first aspect of the present invention, since the support member can be slid in the upright state, it can be moved with one hand, and the display object can be easily moved. A large space can be secured for easy reading and writing, and it is easy to miniaturize compared to conventional TV cameras, and it is possible to use older digital cameras and television receivers So,
By using these, it is possible to provide an extremely inexpensive product.

According to the second aspect of the present invention,
In addition to the effect of the first aspect of the present invention, the magnifying optical unit refracts a vertical light beam as an image into a horizontal light beam, magnifies it, and inputs it to the digital camera, so that the digital camera does not hinder the user. There is an effect that it can be provided at the position.

According to the third aspect of the present invention,
In addition to the effect of the invention described in claim 2, the magnifying optical unit refracts the light twice by the first reflecting mirror and the second reflecting mirror, and enlarges the state where the user is viewing the display target on the monitor. Since the image is projected, it is particularly effective in writing characters.

Further, according to the present invention as set forth in claim 4,
In addition to the effects of the invention described in claim 2 or 3, the digital camera can be detachably provided and the support legs can be folded, so that the digital camera can be compactly housed in a case or the like and portable. To play.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a use state in which a book is displayed.

FIG. 2 is a front view showing a use state in which a map or the like having a large area is displayed.

FIG. 3 is a side view of the same.

FIG. 4 is a plan view of the same.

[Explanation of symbols]

1 Enlarged display device 2 Slide plate 3a Vertical ray 3b First horizontal ray 3c Second horizontal ray 4 First reflector 5 Second reflector 6. Magnifying optical unit 7 Supporting members 8 Digital camera 8a lens 9 Support legs 10 signal lines 11 Monitor 12 Mounting part 13 screws 14 Ray passing part 15 Circular hole 16a vertical part 16b horizontal part 17 Mounting screw 18 Horizontal hole 19 vertical hole 20 horizontal slot 21 Camera fixing screw 22 Magnifying lens 23 Fixing inclined pieces 23a screw hole 24 Smooth ball 25 Support leg fixing screw 26 Fixing plate 26a insertion hole

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Claims (4)

[Claims] 1. A supporting member which is slidable in a standing state on a material to be displayed, and a digital camera which is supported by the supporting member and captures an enlarged image of a display target of the material to be displayed, and converts the image into a digital signal. An enlarged display device using a digital camera comprising a camera and a monitor electrically connected to the digital camera and displaying image data transmitted by the digital camera as an image. 2. A supporting member for supporting a magnifying optical system including a magnifying lens for enlarging a display object of the displayed material, a slide plate being provided at a lower end so as to be slidable on the displayed material, and A digital camera that captures the displayed material enlarged through the magnifying optical system and converts it into a digital signal, a support leg for maintaining the support member in an upright state, and an electrical connection with the digital camera. And a monitor for displaying the image data transmitted by the digital camera as an image. 3. A magnifying optical system, comprising: a first reflecting mirror for horizontally reflecting an image to be displayed on a side opposite to a user side; and an image reflected by both the first reflecting mirror and a digital camera. 3. The digital camera according to claim 2, further comprising a second reflecting mirror for reflecting light in a horizontal direction that coincides with the optical axis, and a magnifying lens disposed so that the optical axis coincides with the digital camera. Enlarged display device. 4. A pair of support legs, and upper ends thereof are pivotally supported on predetermined portions of the support member so as to be horizontally rotatable and position-fixable, and open diagonally outward downward from the support member. While the legs are supported at three points by their lower ends and the lower end of the support member, the digital camera is detachably attached to the support member and displaced in the direction of approaching and separating from the magnifying lens of the magnifying optical system. 4. An enlarged display device using a digital camera according to claim 2, wherein the enlarged display device is capable of being displaced in a horizontal direction and a vertical direction.