JP2012018603A - Erasing device, erasing method and display system with erasing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an erasing device that can surely erase a part of an image displayed on a display screen, to be erased, while a user can visually recognize the image to be erased.SOLUTION: An erasing device includes visual recognition means that enables a part of an image displayed on a display screen, to be erased, to be visually recognized and erasing area identification means for identifying the image area displayed on the display screen, to be erased.

Description

  The present invention relates to an erasing apparatus, an erasing method, and a display system including the erasing apparatus for erasing images such as characters, figures, and symbols displayed on a display screen.

  An electronic white board has been proposed as a conventional display system, for example, a display system using a touch panel (Patent Document 1).

  As shown in FIG. 12, the electronic white board described in Patent Document 1 irradiates light on the flat plate surface of the white board 100, and inputs coordinate coordinates on the flat plate surface based on the reflected light of the light. An indicator 105 and an erasure indicator (erase device) 101 having a portion 102 formed of a reflection member that reflects light in the incident direction, a light source unit that irradiates light on a flat plate surface, and the indicator 105 An optical unit 103 having a light receiving unit for receiving the reflected light, and a processing unit 104 for calculating the position coordinates of the indicator 105 on the flat plate surface based on the reflected light received by the light receiving unit of the optical unit 103. It is constituted by.

JP 2001-243003 A

  However, the electronic whiteboard described in Patent Document 1 should be erased displayed on the whiteboard 100 when the erasure indicator 101 erases the drawing content (image) such as characters and graphics displayed on the whiteboard 100. Since the erasure indicator 101 is placed (positioned) on the image, the image is covered with the erasure indicator 101 so that the image cannot be visually recognized, and there is a possibility of erasing a portion that is not originally desired to be erased. Therefore, there is a problem that an image to be erased cannot be erased reliably.

  The present invention has been made in order to solve the above-described problems, and makes it possible to visually recognize a portion to be erased of an image displayed on a display screen (display portion), and to accurately visually recognize the image to be erased. An object of the present invention is to provide an erasing device, an erasing method, and a display system including the erasing device that can reliably prevent erasing.

  In order to solve the above problems, an erasing apparatus of the present invention is an erasing apparatus for erasing images such as characters, figures, symbols and the like displayed on a display screen, and erases an image displayed on the display screen. The image forming apparatus includes a visual recognition unit that makes it possible to visually recognize a power portion and an erasure area specifying unit that specifies an area to be erased of the image displayed on the display screen.

  Further, the erasing device of the present invention is configured such that the viewing means is configured to be visible so that the image to be erased can be seen through.

  The erasing apparatus of the present invention is configured such that the visualizing means forms an image to be erased in a cavity and is visible.

  Furthermore, the erasing apparatus of the present invention is configured such that the visualizing means is visible on an image display unit that displays an image to be erased.

  Furthermore, in the erasing apparatus of the present invention, the image display unit includes an imaging unit that can read an image to be erased, and the image to be erased read by the imaging unit is displayed on the image display unit and the display screen. It is the structure displayed on at least one of the sub display screens.

  Moreover, the erasing apparatus of the present invention is configured to include a changing unit that changes the viewing area of the image viewed by the viewing unit.

  Moreover, the erasing apparatus of the present invention is configured to include a handle configured to be able to visually recognize an image to be erased.

  The display system according to the present invention includes a display device, a position detection device, a control device, and an erasing device, and the control device detects the coordinate position of the erasing device by the position detecting device, and erases it. In this configuration, an image to be displayed is displayed on a sub display screen of the display screen.

  Furthermore, the erasing method of the present invention is a method for making it possible to visually recognize a portion to be erased of the image displayed on the display screen and erasing the image made visible.

  Since the present invention is configured as described above, a portion to be erased (a portion to be erased) of an image displayed on the display screen can be visually confirmed and erased accurately, and erroneous erasure can be reliably prevented. be able to.

It is a schematic explanatory drawing of the display system provided with the erasure | elimination apparatus which shows embodiment of this invention. FIG. 2 is a schematic functional block explanatory diagram illustrating functions of the display system of FIG. 1. It is operation | movement explanatory drawing at the time of pen input mode of the optical touch panel of FIG. It is operation | movement explanatory drawing at the time of the deletion mode of the optical touch panel of FIG. It is operation | movement explanatory drawing of the optical touch panel of FIG. It is an operation | movement flow of the optical touch panel of FIG. It is a schematic explanatory drawing which shows Example 1 of the erasure | elimination body of the erasing apparatus which shows embodiment of this invention. It is a schematic explanatory drawing which shows Example 2 of the erasure | elimination body of the erasing apparatus which shows embodiment of this invention. It is a schematic explanatory drawing which shows Example 3 of the erasure | elimination body of the erasing apparatus which shows embodiment of this invention. It is a schematic explanatory drawing which shows Example 4 of the erasure | elimination body of the erasing apparatus which shows embodiment of this invention. It is a schematic explanatory drawing which shows the structure provided with the handle in the eraser of the eraser which shows embodiment of this invention. It is a schematic explanatory drawing of the conventional display system.

  Hereinafter, an embodiment of an erasing apparatus according to the present invention will be described based on FIGS. 1 to 7 in a case where the erasing apparatus is implemented in a display system including the erasing apparatus.

  As shown in the schematic explanatory diagram of FIG. 1, the display system provided with the erasing device of the present invention is composed of, for example, a large liquid crystal panel for information display, which is about the size of an electronic white board, and includes characters, figures, symbols, etc. as images. A display device 2 having a display screen 1 for displaying the drawing content of the display, and an input detection touch panel for displaying an image on the display screen 1 or erasing the displayed image by touching (touching) the display screen 1 of the display device 2 The input unit 3 (position detection device) adopting an optical touch panel which is one of the methods, and the input of the input unit 3 is subjected to signal processing to display an image on the display screen 1 of the display device 2 or to be displayed on the display screen 1 A control device 4 that performs control for erasing the displayed image, an input pen 5 that makes the input unit 3 detect the coordinate information by touching the display screen 1, and an erasing portion of the image displayed on the display screen 1. Erasure Image visually recognized by the viewing means, in which is composed of the erase member 6 serving as a erasure area specifying means for specifying a region to be erased.

  Note that, in the above configuration, as will be described in detail in the following description of the embodiment, an erasure area specifying means for specifying an erasure location by being located at an erasure location of an image displayed on the display screen 1 is displayed on the display screen 1. The erasing apparatus is configured together with a visualizing means that makes it possible to visually recognize a portion to be erased, and the visualizing means is configured so that the image to be erased can be seen through, or the image to be erased is displayed. A cavity for see-through is formed or displayed on the image display unit 21 for displaying an image to be erased, and is configured to be visible. It is provided with changing means for changing. The image display unit 21 configures and displays the display screen 1 on the erasing body 6 of the erasing device or configures the sub display screen 22 on the display screen 1 of the display device 2. Furthermore, the image display unit 21 is provided with an imaging means (not shown) that can read an image to be erased.

  Next, the function of each block of the display system including the erasing device will be described with reference to the schematic functional block explanatory diagram of FIG.

  The display device 2 includes a display screen 1, and the display screen 1 has a function as a display device that displays an image and a function as an input device that receives a user input operation on the display screen 1. The display screen 1 displays an image under the control of the control device 4. In addition, the display screen 1 transmits an input operation received by touching the display screen 1 as operation data to the control device 4. For example, a touch panel such as an electromagnetic induction method, an infrared method, or an optical method is applied. can do.

  In the embodiment of the present invention, the optical touch panel shown in FIGS. 3 and 4 is used. Further, as an optical touch panel, for example, a liquid crystal display panel with a built-in optical sensor that detects an input operation of a user by an image can be applied, and the display screen 1 has a function and an input device as a display device for displaying an image. As long as it has a function as described above, it is not limited to these examples.

  And the input part 3 is comprised by the input coordinate detection part 7, the input coordinate signal conversion part 8, and the input coordinate information transmission part 9, and detects the position of the object which exists in the display screen 1 ( FIG. 6, s201).

  The input coordinate detection unit 7 specifies coordinate information when the user touches the display screen 1. The input coordinate signal conversion unit 8 converts the coordinate information specified by the input coordinate detection unit 7 into a method for transmitting to the computer, for example, a USB signal (registered trademark). The input coordinate information transmission unit 9 transmits the signal converted by the input coordinate signal conversion unit 8 to the personal computer of the input coordinate information reception unit 10 of the control device 4 (s202). In addition, although the input unit 3 explained the case where the position is detected based on the coordinates, the present invention is not limited to this. For example, the coordinate position detection method based on the angle signal, the coordinate position based on the light amount signal, and the like. It is also possible to implement a detection method based on the above-described detection method or an infrared distance sensor.

  The control device 4 includes an input coordinate information reception unit 10, an input area calculation unit 11, an operation mode determination unit 12, a display memory area unit 13, a video signal generation unit 14, a video signal transmission unit 15, It consists of

  The input coordinate information receiving unit 10 receives the coordinate information transmitted from the input coordinate information transmitting unit 9 of the input unit 3. The input area calculation unit 11 calculates the area based on the received coordinate information (s203). When the input area of the input area calculation unit 11 is equal to or smaller than the threshold value, the operation mode determination unit 12 determines that the input is performed with the pen and is automatically set to the pen input mode (s204). If the value exceeds the threshold, it is determined that the image is erased by the erasing device, and the erasing mode is automatically set (s205). Based on the operation mode determined by the operation mode determination unit 12, the display memory area 13 records image information displayed on the display screen with an input area exceeding the threshold value (in the case of the deletion mode, the pen image information is deleted). (S207) In the case of the pen input mode, the image information displayed on the display screen 1 is recorded (added pen image information) with an input area equal to or smaller than the threshold (s206). The image signal generation unit 14 generates an image signal to be displayed on the display screen 1 based on the image information recorded in the display memory area 13 (s208, s209). The image signal transmission unit 15 transmits the image signal generated by the image signal generation unit 14 to the display device 2 by, for example, the DVI (Digital Visual Interface) method.

  In the above description, the case where the control device 4 is connected to the display device 2 by the connection line U has been described. However, the control device 4 may be built in the display device 2 without using the connection line U. The control device 4 and the input unit 3 may function as the control device 4 and the input unit 3 on the display screen 1 of the display device 2.

  As shown in FIGS. 3 and 4, the optical touch panel of the input unit 3 is an LED at equal intervals in the Y-axis direction (vertical direction) of the outer peripheral part 2a of the display device 2 and the X-axis direction (horizontal direction) of 2b. A plurality of photocouplers including light-emitting elements 2c and 2d made of phototransistors and light-receiving elements 2e and 2f made of phototransistors. When the amount of light becomes equal to or less than a certain threshold value, it is determined that the user touches (contacts) the straight line with the light emitting elements 2c and 2d of the paired photocoupler, and the X-axis direction (horizontal direction) and In this configuration, the position touched by the user is identified by detecting touch coordinates in the Y-axis direction (vertical direction) (s201).

  The operation of detecting the position of the optical touch panel configured as described above will be described with reference to FIG. 5. From the optical touch panel of the input unit 3, as shown in FIG. 5A, from the light emitting elements 2 c and 2 d. When the amount of light A reaching the light receiving elements 2e and 2f is 100%, there is no touched area on the display screen 1, so the position of the display screen 1 is not detected. Further, as shown in FIG. 5B, even when the user touches the display screen 1 with the eraser 6 or the pen 5, the amount of light reaching the light receiving elements 2e and 2f from the light emitting elements 2c and 2d is about 30%. When it is ˜100%, the position of the display screen 1 is not detected as in FIG. Then, as shown in FIG. 5C, the light is refracted to the erasing body 6 and the pen 5 so that the light amount A reaching the light receiving elements 2e and 2f from the light emitting elements 2c and 2d is less than about 30%. In this way, the position can be detected by reducing the amount of light A reaching the light receiving elements 2e and 2f from the light emitting elements 2c and 2d by using the reflection and refraction of light with the angle B. Even if the angle B is not set, the position can be detected even by using a light shielding means for reducing the light amount A.

  The optical touch panel of the input unit 3 detects an input operation with the input pen 5 or the like by continuously sampling the touched coordinates (s201), and sends the detected coordinate information to the control device 4. This is transmitted (s202) and reflected in the image display on the display screen 1 (s208, s209), adopting a well-known personal computer application for realizing the white board function, and well-known personal computer application As an extended function of FIG. 3, when the touched area 3a is below a certain level, the input mode (s204) is determined by the input pen 5 or the like, and the touched area 3b is above a certain level as shown in FIG. Is determined to be the erasure mode (s205), and in the erasure mode, the image (s206) input in the input mode can be erased. (S207).

  FIG. 7 is a schematic explanatory view of Example 1 of the eraser 6a of the display system provided with the eraser of the present invention.

  In FIG. 7, the erasure area specifying means for specifying the erasure location by locating at the erasure location of the image displayed on the display screen 1 is a visual recognition means that makes it possible to visually recognize the portion to be erased of the image displayed on the display screen 1. In addition, the image forming apparatus constitutes an erasing device, and the visual recognition means is configured so that an image to be erased can be seen through. The erasing body 6a is configured so that a portion to be erased of the image displayed on the display screen 1 can be visually recognized, and the user can visually see the portion to be erased of the image displayed on the display screen 1. It is formed of a transparent member 17 such as glass or plastic that can be seen through. Further, the eraser 6a is formed of a material that can transmit visible light C, and an infrared filter 16 (IR filter) that cuts an infrared region serving as a peak sensitivity of the phototransistor is disposed on the outer periphery of the eraser 6a. ing.

  In addition, it is preferable that the wavelength which cuts this infrared filter 16 is 800 nm or more. Further, the infrared filter 16 is disposed on the erasing body 6a so as to shield the light irradiated from the light emitting elements 2c and 2d from irradiating the light receiving elements 2e and 2f. Since the light can be blocked only when the body 6a is touching the display screen 1, it is possible to make the light receiving elements 2e and 2f surely recognize whether or not the eraser 6 has touched the display screen 1. It becomes. Although the case where the infrared filter 16 is integrated with the erasing body 6a is shown, the infrared filter 16 may be attached to the erasing body 6a with an attachment body such as a magnet, a suction cup, or an adhesive.

  Next, the erasing operation of the erasing body 6a having the above configuration will be described.

  First, when the user erases the image displayed on the display screen 1 of the display device 2, the eraser 6a is positioned at the position of the image to be erased, and the user then erases the image to be erased. Is visually confirmed through a visible portion (transparent portion) of the erasing body 6a, and if it is determined that the image is to be erased, the image to be erased displayed on the display screen 1 is touched by the erasing body 6a.

  Then, the infrared filter 16 arranged in the erasing body 6a blocks the amount of light from the pair of light emitting elements 2c and 2d detected by the light receiving elements 2e and 2f of the photocoupler on the display screen 1, and the light shielding is constant. When the value is equal to or lower than the threshold value, it is determined that the display screen 1 on the straight line with the light emitting elements 2c and 2d of the paired photocoupler is touched (contacted) by the user, and the input coordinate detection unit 7 of the input unit 3 The touched coordinates are detected (s201).

  The detected coordinate information is converted into a method for transmitting to the computer by the input coordinate detecting unit 7, for example, a USB signal, and the signal converted by the input coordinate signal converting unit 8 is controlled by the input coordinate information transmitting unit 9. It is transmitted to the computer of the input coordinate information receiving unit 10 of the device 4 (s202). The input coordinate information receiving unit 10 receives the coordinate information transmitted by the input coordinate information transmitting unit 9 of the input unit 3.

  The input area calculation unit 11 calculates the input area based on the input coordinates of the input coordinate information transmission unit 9, and the erasure body 6a determines that the input area of the input area calculation unit 11 exceeds the threshold value. (S203) The operation mode determination unit 12 automatically sets the erasing device mode (s205). Based on the operation mode determined by the operation mode determination unit 12, the display memory area erases the image of the input area (s207). ).

  The video signal generation unit 14 generates an image signal displayed by the display unit from the display memory area, and the video signal transmission unit 15 displays the video signal generated by the video signal generation unit 14 in the DVI method, for example. Send to. Then, the image displayed on the display unit 1 is deleted (s209).

  FIG. 8 is a schematic explanatory diagram of Example 2 (showing another embodiment) of the erasing body 6b of the display system including the erasing device according to the embodiment of the present invention.

  An erasing area specifying means for specifying an erasing position by being positioned at an erasing position of the image displayed on the display screen 1 includes an erasing device together with a visualizing means for allowing a portion to be erased of the image displayed on the display screen 1 to be visually recognized. In addition, the visual recognition means is configured to allow the image to be erased to be seen through, and further includes a changing means for changing the visual recognition area of the image visually recognized by the visual recognition means. The erasing body 6b is configured so that a portion to be erased of the image displayed on the display screen 1 can be visually recognized, and the user directly sees the portion to be erased of the image displayed on the display screen 1 with his / her eyes. A cavity 18 is formed so that it is possible.

  The portion where the image of the eraser 6b can be visually recognized is a cavity 18, and there is no member in the visible portion as in Example 1 or the conventional eraser, so that the image is directly displayed on the display screen 1 without any member. The portion to be erased of the displayed image can be visually recognized, and the visually recognized image is not blurred as compared with the case where the erased body 6b has a member in the visually recognized portion. In this case, since the portion for visually recognizing the image is the cavity 18, the cost of the member can be reduced.

  As in the first embodiment, an infrared filter 16 (IR filter) that cuts the infrared region that becomes the peak sensitivity of the phototransistor is disposed on the outer peripheral frame forming the cavity 18 of the eraser 6b. The description of the function of the infrared filter 16 for cutting the infrared region is omitted. Further, the outer peripheral frame forming the cavity 18 of the erasing body 6b may be formed so as to be able to be enlarged / reduced and / or deformed, and the size and / or shape may be freely changed. With such formation, when the user visually recognizes the image displayed on the display screen 1 through the eraser 6b, the image visually recognized by the eraser 6b is widened or narrowed, or the shape is changed. Therefore, it is possible to change the area and / or shape that the user can visually recognize with the eraser 6b, and thus change the area and / or shape that the user should erase with the eraser 6b. It is possible to perform erasure more reliably and accurately.

  The erasing operation of Example 2 of the erasing body of the display system including the erasing device according to the embodiment of the present invention shown in FIG. 8 is basically the same as the erasing operation of the erasing body 6a of Example 1 described above. Therefore, explanation is omitted.

  FIG. 9 is a schematic explanatory diagram of Example 3 (showing still another embodiment) of the eraser 6c of the display system including the eraser according to the embodiment of the present invention.

  The erasing area specifying means for specifying the erasing portion by positioning the erasing portion of the image displayed on the display screen 1 together with the erasing device 4 together with the visualizing means for making it possible to visually recognize the portion to be erased of the image displayed on the display screen 1. Further, the visual recognition means is configured to be able to see through the image to be erased, and further includes a changing means for changing the visual recognition area of the image visually recognized by the visual recognition means. .

  The erasure body 6c allows the user to visually recognize the part to be erased of the image displayed on the display screen 1 in the same manner as in the first embodiment so that the part to be erased of the image displayed on the display screen 1 can be visually recognized. It is made of a transparent member such as glass or plastic so that it can be seen, and the area for viewing the image displayed on the display screen 1 can be changed and erased. The erasing body 6c is formed by the first erasing unit 19 and the second erasing unit 20 so that the area can be changed, and the second erasing unit 20 can be moved in and out of the first erasing unit 19. 19 is provided with an extendable spring (not shown) for applying a biasing force in the emission direction from the first erasing unit 19 to the second erasing unit 20. Then, by applying pressure to the second erasing unit 20 of the erasing body 6c, the second erasing unit 20 is stored inside the first erasing unit 19, and the area of the erasing body is the second erasing unit 20 of FIG. The area S2 of the first erasing portion 19 and the second erasing portion 20 (sum) of FIG. Accordingly, the area of the eraser 6c can be changed according to the size of the portion to be erased of the image displayed on the display screen 1.

  For example, when the portion to be erased of the image displayed on the display screen 1 is smaller than the area S2 before the pressure is applied to the eraser 6c, the image can be sufficiently displayed with the area S2 before the pressure is applied to the eraser 6c. It is possible to visually recognize the image that is not desired to be erased without erasing the image that is desired to be erased, and to perform the erasing operation while visually confirming the image that is desired to be erased. On the other hand, when the portion to be erased of the image displayed on the display screen 1 is larger than the area S2 before the pressure is applied to the eraser 6c, the image is visually recognized in the area S1 after the pressure is applied to the eraser 6c. Since the viewing area is wider than before the pressure is applied to the erasing body 6c, the time for the erasing operation can be saved compared with the area S2 before the pressure is applied.

  The eraser 6c is provided with an infrared filter (filter) that cuts an infrared region that is the peak sensitivity of the phototransistor similar to that of the first embodiment or the second embodiment. A description of the function is omitted.

  9 is basically the same as the erasing operation of the erasing body of Example 1 or Example 2 in the erasing body of the display system having the erasing device according to the embodiment of the present invention shown in FIG. Since it is the same, description is abbreviate | omitted.

  FIG. 10 is a diagram showing a sub-display screen of a display system including an erasing device according to an embodiment of the present invention and an image display unit of an erasing body 6d in Example 4 (showing still another embodiment). It is a schematic explanatory drawing.

  An erasing area specifying means for specifying an erasing position by being positioned at an erasing position of the image displayed on the display screen 1 includes an erasing device together with a visualizing means for allowing a portion to be erased of the image displayed on the display screen 1 to be visually recognized. Further, the visual recognition means is configured to be visible by being displayed on an image display unit that displays an image to be deleted.

  An image display unit 21 that displays an image to be erased is configured in the eraser 6d, and the image display unit 21 that displays an image to be erased is displayed as a sub display screen 22 on a part of the display screen 1 of the display device 2. The image display unit 21 of the eraser 6d and / or the sub display screen 22 of the display screen 1 of the display device 2 is configured to be visible.

  The user positions (holds) the eraser 6d at the position of the image to be erased on the display screen 1 of the display device 2, and the user selects the image to be erased from the image display unit 21 and / or the eraser 6d. It can be visually recognized by the display on the sub display screen 22. As a display method, an image to be erased is read by an imaging means (not shown) provided in the erasing body 6d, for example, an imaging device such as a CCD camera, and the image to be erased read by the imaging means is displayed as an image. This is displayed on the unit 21.

  Then, the user visually confirms the image to be erased displayed on the image display unit 21, and when the user determines that the image is to be erased, the user erases the image displayed on the display screen 1 by the eraser 6d. Touch the image you want. When the user touches the image to be erased displayed on the display screen 1 with the eraser 6d and determines that the display screen 1 is touched (contacted) with the eraser 6d, the input coordinate detector 7 of the input unit 3 Then, the touched coordinates are detected (s201), and the detected coordinates are transmitted to the control device 4, and an image to be erased is displayed on the sub display screen 22. In addition, when the eraser of the first to third embodiments touches (contacts) the display screen, the input coordinate detection unit 7 of the input unit 3 detects the touched coordinate (s201), and the detected coordinate. Is transmitted to the control device 4 and an image to be deleted can be displayed on the sub display screen 22.

  Then, the control device 4 erases the image to be erased displayed on the display screen 1, the image display unit 21 and / or the sub display screen 22 from the display screen 1 by performing image processing using a known image processing technique. Erase the power image.

  In the above case, when the image displayed on the display screen 1 is erased, the image to be erased can be displayed on the image display unit 21 of the eraser 6d and / or the sub display screen 22 of the display screen 1 of the display device 2. . At the same time, the image that the user wants to erase on the image display unit 21 of the eraser 6d is also displayed on the sub display screen 22, so that the image to be erased can be confirmed on the image display unit 21 and the sub display screen 22. Since the image to be erased can be confirmed twice, erroneous erasure can be reliably prevented.

  In the fourth embodiment, the case where the image to be erased is erased by touching the image to be erased displayed on the display screen 1 has been described. However, a system for erasing the image on the eraser 6d, for example, erasure By configuring a mode button (not shown), an image displayed on the display screen 1 can be erased without touching the display screen 1.

  In the fourth embodiment, the case where the image to be erased displayed on the display screen 1 is touched has been described. However, the image to be erased displayed on the sub display screen 22 is touched to be erased. You can also.

  In the fourth embodiment, the image display unit 21 that displays the image to be erased is displayed on the erasure body 6d and the sub display screen 22 of the display screen 1 of the display device 2 so as to be visible. The image display unit 21 that displays the power image may be displayed on either the eraser 6 or the sub display screen 22 of the display screen 1.

  Further, as a display method, the erasing body 6d is provided with an imaging unit to read an image to be erased, and the read image to be erased is displayed on the image display unit 21, but the erasing body 6d has no imaging unit. However, when the eraser 6d touches the display screen 1, the coordinate position of the eraser is detected by the position detection device 3, and for example, an image to be erased using image communication or the like by a wireless device (not shown) You may make it the structure which transmits to the display part 21 and displays it.

  Furthermore, although the case where the sub display screen 22 is configured to be fixed at a predetermined position on the display screen 1 has been described, the sub display screen 22 may be configured to be movable on the display screen 1 as necessary. If the user is on the right side of the display screen 1, the sub display screen 22 is displayed on the right side. If the user is on the left side of the display screen 1, the sub display screen 22 is displayed on the left side, and the sub display screen 22 is moved to the user's preferred location. It may be configured to display.

  FIG. 11 is a schematic explanatory diagram showing a configuration in which the erasing body of the erasing apparatus showing the embodiment of the present invention has a handle.

  In the erasing body of the erasing apparatus described in the first to fourth embodiments, when the erasing body 6 is moved onto the display screen 1 and positioned on the image to be erased, the erasing body 6 is held and moved by the user's hand. For this purpose, the portions (the transparent portions 17, 19, 20 of the eraser, and the cavity 18 of the eraser) that make the image to be erased visible on the eraser 6 are covered (obstructed) by the user's hand. Therefore, the problem that the image to be erased cannot be surely confirmed is caused, but it can be solved by providing the handle 23 that holds the eraser 6 and is movable.

  The handle 23 is preferably provided at a position where the image visually recognized by the user with the eraser 6 is not significantly blocked. For this purpose, the handle 23 is configured to be mounted via a pivot (rotation) pin 24, a hinge 24, and the like so as to be movable to a position 23a separated from a portion where the image to be erased of the erasing body 6 can be visually recognized. . Then, by adopting a configuration in which the handle 23 is attached to the erasing body 6 via the pivot (rotation) pin 24, the hinge 24, and the like, the handle 23 in the erasing body 6 is attached to the hinge 24 when the erasing body 6 is not used. The handle 23 is placed on the erasing body 6 as shown by 23a, and can be stored compactly when not in use.

1 Display screen (display section)
2 Display device 3 Input unit (position detection device)
4 control device 5 input pen 6 eraser (erase device)
16 Infrared filter (erase area identification means)
17, 19, 20 Perspective member (viewing means)
18 Cavity (visibility means)
21 Image display (viewing means)
22 Sub display screen 23 Toride

Claims (10)

An erasing device for erasing an image displayed on a display screen,
A visual means for enabling visual recognition of a portion to be erased of the image displayed on the display screen;
An erasing area specifying means for specifying an area to be erased of the image displayed on the display screen;
An erasing device comprising:   2. The erasing apparatus according to claim 1, wherein the visualizing means is configured so that the image to be erased can be seen through.   2. The erasing apparatus according to claim 1, wherein the visualizing means forms an image to be erased in a cavity so as to be visible.   2. The erasing apparatus according to claim 1, wherein the visualizing means is visible on an image display unit that displays an image to be erased.   The erasing device has an imaging unit capable of reading an image to be erased displayed on the display screen, and displays the image to be erased read by the imaging unit as a sub-display of the image display unit and the display screen. The erasing apparatus according to claim 4, wherein the erasing apparatus displays on at least one of the screens.   6. The erasing apparatus according to claim 1, further comprising a changing unit that changes a viewing area of an image viewed by the viewing unit.   6. The erasing apparatus according to claim 1, wherein the erasing apparatus includes a handle configured to be able to visually recognize an image to be erased. A display device having a display screen for displaying an image;
An erasure measure according to any one of claims 1 to 6,
A position detecting device for detecting the position of the erasing device arranged on the display screen of the display device;
A control device for performing signal processing on the input of the position detection device and displaying an image on the display screen or erasing the image displayed on the display screen;
A display system characterized by comprising:   9. The display system according to claim 8, wherein the control device detects the coordinate position of the erasing device with the position detecting device and displays an image of an area to be erased on a sub display screen of the display screen. . An erasing method for erasing an image displayed on a display screen,
Make the part of the image displayed on the display screen to be erased,
An erasing method for erasing the image that is made visible.