WO2010119603A1 - 手書き入力装置 - Google Patents
手書き入力装置 Download PDFInfo
- Publication number
- WO2010119603A1 WO2010119603A1 PCT/JP2010/001432 JP2010001432W WO2010119603A1 WO 2010119603 A1 WO2010119603 A1 WO 2010119603A1 JP 2010001432 W JP2010001432 W JP 2010001432W WO 2010119603 A1 WO2010119603 A1 WO 2010119603A1
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- WIPO (PCT)
- Prior art keywords
- handwriting input
- visible light
- input device
- coating
- light
- Prior art date
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0425—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/10—Image acquisition
- G06V10/17—Image acquisition using hand-held instruments
Definitions
- the present invention relates to a handwriting input device that mechanically reads information such as characters and figures drawn on a board surface.
- an input device (hereinafter referred to as an electronic blackboard type handwriting input) having a function of electronically or optically reading characters and figures written with a writing instrument called a marker on a white sheet or whiteboard. Called a device) and is widely used mainly in meetings and presentations.
- a white sheet is rotated by a roller and a motor, light is applied to a writing surface that is rotated and moved to the back side of the apparatus, and a plate surface moving type that converts it into an electrical signal by a CCD (Charge Coupled Device) line sensor or the like,
- CCD Charge Coupled Device
- a recording method of the read data there are a method of printing and recording on paper using a thermal method, an ink jet method, an electrophotographic method, and the like, and a method of storing in a recording medium such as a compact flash (registered trademark) memory.
- a handwriting input device As another example of a handwriting input device, a handwriting input device (hereinafter referred to as display-type handwriting) that converts characters and figures drawn with a pen-type instrument (position indicator) on a display device such as a flat panel display into digital data. And is widely used as an input interface for graphics design drawing tools and conference digital whiteboards.
- a reading method there are an electromagnetic induction method, an ultrasonic method, a pressure-sensitive method, and the like, and any method is a method in which position coordinates on a display device of a pen-type instrument are detected by various sensors (for example, Patent Document 1). reference).
- the user can input characters and figures to the computer as if writing on paper with a pen or pencil. Subsequently, if a computer process such as an optical character reading process (OCR) is performed on the input characters and figures in real time, the input handwritten characters and figures will be printed from the side of the input. Can be displayed on the screen as a well-formed figure, which can be used to improve the expressive power of the user. Furthermore, it is also possible to use input handwritten characters and figures as input parameters for computer simulation.
- OCR optical character reading process
- an input figure is interpreted as a boundary (such as an airplane wing) in a fluid simulation, and an arrow indicating the fluid flow is displayed around it, the fluid flow generated around the drawn figure is taken into account. It becomes possible to perform various design work like a sketch. This is particularly useful in outline design, which is the early stage of design work.
- Some display-type handwriting input devices can cause a computer to execute processing corresponding to an identifier by using a plurality of position indicators with different identifiers or a position indicator that can switch identifiers with a switch. . For example, it is possible to realize an operation of inputting a character or a figure with a certain position indicator and erasing an already entered character or figure with another position indicator.
- FIG. 24 is a block diagram showing an example of a display-type handwriting input device described in Patent Document 1.
- the loop coils C1 to C48 and C1 ′ to C48 ′ generate an electromagnetic field by flowing an alternating current, or convert a change in the electromagnetic field into a current.
- the X direction (Y direction) selection circuit 221X (221Y) selects a loop coil to be used from among a plurality of loop coils.
- the X direction (Y direction) connection switching circuit 222X (222Y) exclusively connects the loop coil in use with the transmission circuit 223 or the reception circuit 224.
- the transmission circuit 223 and the reception circuit 224 generate or detect an alternating current signal having a predetermined frequency, respectively.
- the processing device 225 controls the entire device and processes detected signals.
- the position indicator 226 includes a tuning circuit 227 that oscillates in synchronization with an electromagnetic field having a specific frequency.
- the display device 228 displays information according to the processing result of the detected signal.
- the transmission circuit 223 generates an alternating current signal having a frequency f1.
- This alternating current signal is sent to one of the loop coils, for example, the loop coil C1 (C1 ′) via the X direction (Y direction) connection switching circuit 222X (222Y) and the X direction (Y direction) selection circuit 221X (221Y).
- the tuning circuit 227 oscillates when the position indicator 226 including the tuning circuit 227 that is tuned to the frequency f1 is in the vicinity of the loop coil C1 (C1 ′).
- the loop coil C1 (C1 ′) is generated.
- the oscillating tuning circuit 227 gradually discharges.
- the position indicator 226 generates an electromagnetic field having a frequency f1.
- the electromagnetic field generated by the position indicator 226 is converted into an alternating current signal having a frequency f1 by the loop coil C1 (C1 ′), and the X direction (Y direction) selection circuit 221X (221Y) and the X direction connection switching circuit 222X (222Y). ) Is detected by the receiving circuit 224.
- the reception circuit 224 notifies the processing device 225 that the position indicator 226 has been detected at the position of the loop coil C1 (C1 ′).
- the processing device 225 detects the X coordinate and the Y coordinate of the position indicator 226 by repeating such an operation while sequentially switching the loop coil to be used.
- the display device 228 changes the pixel of the detected position coordinate to a color different from the background color, and feeds back to the user that the position indicator 226 has been detected at that position.
- Patent Document 1 Although there is no direct description in Patent Document 1, an operation of inputting characters and figures with a certain position indicator and erasing already input characters and figures with another position indicator can be realized.
- the transmission circuit 223 further sequentially generates an alternating current signal having a frequency f2 different from f1.
- the position coordinates of another position indicator that incorporates a tuning circuit that oscillates in synchronization with the frequency f2 are detected.
- the display device 228 changes the pixels around the position coordinates of the position indicator that synchronizes with the detected frequency f2 to the background color, thereby realizing an operation of erasing characters and figures already input by the user.
- the position coordinates of a single position indicator and switch switching can be used instead of the position coordinates of a plurality of different position indicators. Since the state can be detected, the user can switch between the drawing mode and the erasing mode with a switch.
- the biggest advantage of the handwriting input device is to draw characters and figures using a pen-shaped instrument like a marker on a work plane like a whiteboard, using an operation method that many users have already learned, Characters and figures can be converted into digital data. That is, if the handwriting input device is used, it is possible to easily use various processing capabilities of the computer without learning the operation method of the input device specialized for the computer such as a keyboard and a mouse.
- the electronic blackboard type handwriting input device cannot recognize characters and figures drawn on a white sheet or white board in a dark place. For this reason, it is difficult to use an electronic blackboard type handwriting input device in a situation where, for example, a presentation is performed in a darkened room to show a slide.
- the display-type handwriting input device displays the drawn characters and figures on the display screen, so there is no problem even in a dark atmosphere.
- the input characters and figures are digital data in the computer. It is stored only as. For this reason, if the stored digital data is lost, the input information is completely lost.
- An electronic blackboard-type handwriting input device can be used to erase all or part of the drawn characters and figures without using special instruments such as tissue paper or fingertips, whereas display-type handwriting.
- the input device requires a special instrument (such as a dedicated position indicator).
- the electronic blackboard type handwriting input device and the display type handwriting input device have their merits and demerits, respectively.
- the object of the present invention is to use the above-mentioned problem, that is, it is difficult to use in a dark place, and there is a risk that input information may be completely lost if the digital data is lost. It is an object of the present invention to provide a handwriting input device that solves the problem that all or any part of drawn characters and figures cannot be erased.
- a handwriting input device includes a transparent or semi-transparent object to be coated, a detection unit that detects a position where the coating material adheres on the body to be coated, and the detection unit that adheres the coating material.
- Display means for causing a visual change in accordance with the detected position.
- the present invention Since the present invention is configured as described above, it can be used even in a dark place, and even if digital data is lost, it can prevent the loss of input information, and a special instrument can be used. All or a part of the drawn characters and figures can be erased.
- Block diagram of the first embodiment Detailed block diagram of the light source section of FIG. Detailed block diagram of the applicator of FIG. Detailed block diagram of the detector of FIG. The figure which shows the processing result by the image frame recorded by the detection part of FIG. 1, and a process part Flowchart of image processing executed by the processing unit in FIG.
- Block diagram of the second embodiment Detailed block diagram of the light source section of FIG. The figure explaining a mode that the light generated from the light source part of FIG.
- the figure which shows the image frame recorded by the detection part of FIG. The figure explaining a mode that the light guided in the to-be-coated body of FIG. 12 was spread
- FIG. 1 A flowchart showing an example of processing additionally executed by the processing unit in FIG. 1 when executing optical character reading processing.
- the figure which shows the information displayed on the display part of FIG. 1 when performing an optical character reading process Block diagram of the fifth embodiment Block diagram of the sixth embodiment
- an input device 1 of the present invention is connected to a storage device 7, and includes a display unit 2 constituted by a projector 21 and a screen 22, an object 3 to be coated and removed, and a light source.
- the unit 4 includes a detection unit 5, and a processing unit 6.
- the projector 21 projects the video input from the processing unit 6 on the screen 22.
- the projector 21 may be a general liquid crystal projector, and the screen 22 may be a resin film that diffuses light.
- the coated body 3 is a transparent flat plate to which the coated material can be attached and wiped off, and may be a thin plastic plate, for example.
- the screen 22 and the to-be-coated body 3 are drawn separately in the drawing, the configuration in which the screen 22 is attached to the back surface of the to-be-coated body 3 is actually desirable.
- the substrate 3 may be the screen 22 itself.
- the light source unit 4 irradiates light from outside the visible light region such as infrared light obliquely from above to the back surface of the coated body 3 through the screen 22.
- the light source unit 4 may be, for example, one or more infrared light emitting diodes (LEDs) 43 driven by a power supply circuit 41 and a drive circuit 42 as shown in FIG.
- the detection unit 5 is an optical device that detects the position where the coated material adheres to the coated body 3 using the light emitted from the light source unit 4, for example, a charge coupled device (CCD) image sensor or a complementary metal oxide semiconductor.
- CCD charge coupled device
- CMOS Complementary A camera equipped with a semiconductor image sensor such as a metal oxide semiconductor image sensor may be used.
- the applicator 8 is a container having a structure in which the application 81 filled inside is applied to the object 3 and a felt pen container such as a whiteboard marker can be used.
- An example of the structure of the applicator 8 is shown in FIG.
- a felt material 83 is attached to a through-hole provided in a tip portion of a pen-shaped housing 82, and the applied material 81 filled in the housing 82 is felt by a capillary phenomenon. Soaked in constantly.
- a cap 84 attached to the rear end of the housing 82 is detachable so that the application 81 can be replenished.
- the coated material 81 is obtained by dissolving at least an optical material described later in a liquid such as a volatile solvent, and has a property that is substantially transparent (or translucent) to visible light (that is, all the coating materials 81 include The component has a property of being almost transparent (or translucent) to visible light.
- a volatile solvent for example, an alcohol solvent can be used.
- the optical material is substantially transparent (or translucent) to visible light, but absorbs light in the wavelength region of light emitted from the light source unit 4.
- an infrared absorbing ink used for invisible barcode printing such as ytterbium oxide can be used.
- the coated material 81 is not only an optical material but also a resin material that supports the optical material to adhere to the coated body 3, and a release material that makes it easy to wipe the optical material and the resin material from the coated body 3. Further, it may be included. As such a resin material and a release material, those contained in a general whiteboard marker can be used. It should be noted that the coating material 81 that is initially liquid is applied to the substrate 3 and after a while, the volatile solvent evaporates and adheres to the substrate 3 as a solid. In the present specification, both the liquid state substance before the volatile solvent is vaporized and the substance which the volatile solvent is vaporized and adheres to the object 3 as a solid substance are referred to as a coated substance.
- the processing unit 6 receives the image of the object 3 to be coated and the coating material adhering to the image captured by the detection unit 5 in the wavelength region of the light emitted from the light source unit 4, and images such as brightness adjustment and distortion correction as necessary. Processing is performed and output to the display unit 2 and the storage device 7.
- the processing unit 6 includes an external device connection interface and a display output video card, and a general personal computer (PC) on which a general-purpose operating system, driver software, and an image processing program are executed can be used.
- PC personal computer
- the storage device 7 is a device that stores an input result from the input device 1, and may be, for example, the above-described main storage device or secondary storage device of the PC.
- FIG. 4 is a block diagram illustrating a configuration example of the detection unit 5.
- the detection unit 5 includes a camera module 51 including a CCD 52 and an interface unit 53, a lens unit 54, and a visible light cut filter 55.
- the CCD 52 is an element that photoelectrically converts the brightness of light incident through the lens unit 54 and the visible light cut filter 55 into the amount of charge, and has sensitivity in the wavelength region of light emitted from the light source unit 4.
- the interface unit 53 is an element that converts an electric signal input from the CCD 52 from analog to digital and converts the signal into a predetermined transfer format. For example, a standard such as CameraLink or IEEE1394 can be used as the transfer format.
- the camera module 51 formed by the CCD 52 and the interface unit 53 may be, for example, a generally available CameraLink camera or an IEEE1394 camera.
- the lens unit 54 is an element that collects light incident from an object to be photographed and guides it to the CCD 52, and may be a generally available camera lens.
- the visible light cut filter 55 is an element that removes most of the visible light from the light guided to the CCD 52 by the lens unit 54, and the detection unit 5 uses the light emitted from the light source unit 4 to apply the coating on the substrate 3. It makes it possible to detect the position of attachment.
- a multilayer interference filter can be used as the visible light cut filter 55.
- the detection unit 5 captures images of the object to be coated 3 and the coating material attached thereto on a regular basis, for example, at 60 frames per second outside the visible light region. If it is assumed that the application object has not adhered to the object 3 to be applied, one image (image frame) recorded by the detection unit 5 is, for example, as shown in FIG. .
- the bright part is the object 3 to which the screen 22 is attached
- the surrounding dark part is an image around the object 3 to be applied.
- the reason why the coated body 3 appears bright is that light outside the visible light region emitted from the light source unit 4 is diffused by the screen 22 attached to the coated body 3 and reaches the detecting unit 5.
- the image frame recorded by the detection unit 5 is, for example, as shown in FIG.
- a portion of the shape of “A” that appears dark in the white rectangular region is a portion where the application object is adhered on the application target body 3.
- the reason why the portion to which the coated material is attached looks dark is that the optical material that is a component of the coated material absorbs light outside the visible light region diffused by the screen 22. Accordingly, the absorption rate of the optical material with respect to light outside the visible light region needs to be high enough to enable the detection unit 5 to distinguish and record the portion where the coating is attached and the portion where the coating is not attached.
- the application is almost transparent (or translucent), so the user can hardly confirm the application attached to the object 3 with the naked eye.
- FIG. 6 is a flowchart illustrating an example of image processing executed by the processing unit 6.
- the processing unit 6 monitors reception of an image frame from the detection unit 5 (step S61 in FIG. 6), and each time an image frame is received, first, lens distortion correction processing is executed (step S62).
- the lens distortion is a phenomenon in which a straight side of an object or the like is distorted in a curved shape due to the optical characteristics of the lens unit 54, and is particularly noticeable when a wide-angle lens is used.
- the lens distortion correction process is a process for removing this distortion. In order to perform the lens distortion correction process, first, a gray code pattern as shown in FIG. 7 is photographed in advance by the detection unit 5, and a correction function is derived. In the lens distortion correction processing, the lens distortion is removed by applying this correction function to each pixel of the image frame. Since the lens distortion correction method is detailed in Non-Patent Document 1, for example, detailed description of the algorithm is omitted here.
- the image frame in FIG. 5B is removed from the lens distortion and becomes as shown in FIG. 5C.
- the curved distortion has been removed by the lens distortion correction processing in step S62, the object 3 that is originally rectangular is still trapezoidal. This is a distortion that occurs because the detection unit 5 images the object 3 from above, and is called a trapezoidal distortion. Further, an unnecessary image (dark part) is also reflected around the object 3 to be coated.
- the trapezoidal distortion correction process step S63
- a process for removing the trapezoidal distortion and removing an unnecessary image around the object 3 is performed.
- the size of the image frame is W pixels ⁇ H pixels
- the projective transformation necessary for correcting the trapezoidal distortion is defined as a matrix for converting the points p1 to p4 to the points p1 ′ to p4 ′, respectively, and the values of the points p1 to p4 and p1 ′ to p4 ′ are calculated by inverse matrix calculation.
- each pixel intensity of the image frame is adjusted using, for example, the correspondence shown in FIG.
- the pixel intensity is represented by an integer value of 0 to Imax.
- pixels with intensity Ith or higher are converted to intensity Imax, and pixels with intensity 0 to Ith are assigned to intensity 0 to Imax.
- the contrast of the image frame in FIG. 5D is improved, as shown in FIG.
- the image frame processed by the processing unit 6 is output to the storage device 7 and the display unit 2.
- the processing unit 6 outputs 60 image frames per second.
- the storage device 7 regularly records the image frame output from the processing unit 6 as a moving image or as a still image at the timing of a user instruction. At this time, in order to reduce the necessary storage capacity, an appropriate image compression process may be performed.
- the display unit 2 displays the image frame output from the processing unit 6 each time.
- each point on the object to be coated 3 and each point on the screen 22 of the display unit 2 are in an overlapping positional relationship.
- the character “A” drawn by the user is displayed at the position.
- the display resolution of the display unit 2 has been described on the assumption that it is the same as the resolution of the image frame captured by the detection unit 5. However, if the two resolutions are different, the processing unit 6 In this case, the image may be displayed on the display unit 2 after appropriate enlargement / reduction.
- the application is almost transparent (or translucent) in the visible light region, the user can hardly confirm the application attached to the object 3 with the naked eye. Therefore, the photographed image of the coated material projected on the screen 22 can be seen through to the user. If the optical substance contained in the coating applied to the coated body 3 is photographed by the detection unit 5 and displayed on the display unit 2 with a sufficiently short delay, the user can immediately follow the application of the coating. A photographed image of the application can be confirmed at the same position on the screen 22. For this reason, with the handwriting input device of this embodiment, the user can input characters and figures with the same feeling as drawing with general ink that absorbs visible light.
- the corresponding portion of the applied material on the object 3 is removed, and the portion absorbs light outside the visible light region. Do not do it.
- the coated material is physically attached on the coated body 3, no special instrument is required, and the coated material can be directly wiped with a general object such as dust paper or a finger.
- FIG. 20 is a flowchart illustrating a processing example additionally executed by the processing unit in this configuration.
- the processing unit 6 calculates an image difference between the current image frame and the previous image frame (step S201 in FIG. 20).
- the image difference can be calculated using an inter-frame difference technique generally known in the area of image processing. If the image difference is less than or equal to the threshold value, the timer T is incremented by 1 (step S202). Subsequently, the value of T is evaluated (step S203). If T is equal to or greater than the threshold value ⁇ T, the OCR process is turned on (step S204). On the other hand, when the image difference is larger than the threshold value (step S205), the processing unit 6 resets the timer T to 0 and turns off the OCR process (step S206).
- FIG. 21 (c) it is assumed that the user has drawn a character string of “Hello” on the object 3 using the applicator 8. Since the detection unit 5 constantly records the image of the object 3 and the application object attached thereto, information displayed on the display unit 2 while the user is inputting a character string is shown in FIGS. As shown by (c), it changes in steps. On the other hand, when the user completes the input of the character string, the image frame does not change in the state of FIG. Then, when a certain time has elapsed, the OCR processing is turned on, and the typed characters are displayed in the vicinity of the attached coating as shown in FIG.
- a proximity sensor is mounted on the input device 1 so that the user can apply the object 3 to be coated.
- the computer processing is turned on when moving away from the computer and turned off when approaching again.
- the position where the object is attached is detected by the detection unit 5.
- These characters and figures are displayed at the same place on the screen 22 by the display unit 2 arranged on the back side.
- the to-be-coated body 3 is transparent or translucent, and the coated object is transparent or translucent. Therefore, in a bright place or a dark place, the user can see the characters and figures displayed on the screen 22 through the coated body 3 and the coated material.
- the light source unit 4 a causes light outside the visible light region to enter from the side surface of the coated body 3.
- the light source unit 4a for example, one or more infrared light emitting diodes (LEDs) 44 arranged on a straight line driven by a power supply circuit 41 and a drive circuit 42 as shown in FIG. 11 can be used.
- the light source unit 4a may be arranged on one side or a plurality of sides of the object to be coated.
- FIG. 10 shows an example in which the light source part 4a is arranged at two places on the upper and lower sides of the substrate 3 to be coated.
- the display unit 2a is a flat panel display such as a liquid crystal display, a plasma display, or a field emission display
- the coated body 3 is a protective panel such as a plastic or glass plate disposed in front of the flat panel display.
- the display part 2a and the to-be-coated body 3 are drawn apart in the figure, it is desirable to actually arrange
- the optical substance contained in the coating is a substance that is substantially transparent (or translucent) to visible light, but reflects or diffuses light outside the visible light region emitted by the light source unit 4a.
- a cholesteric liquid crystal polymer that reflects only infrared light can be used.
- Other configurations are basically the same as those in the first embodiment.
- the light source unit 4a makes light outside the visible light region incident from the side surface of the object 3 to be coated. If it is assumed that the coated object is not attached to the coated body 3, the incident light is totally reflected on the surface of the coated body 3, and is confined inside and guided as shown in FIG. .
- the detection unit 5 regularly shoots the image of the object to be coated 3 and the coated material attached thereto outside the visible light region. For example, as shown in FIG. 13A, the image frame recorded by the detection unit 5 is almost completely dark. This is because the light emitted from the light source unit 4 a is confined inside the coated body 3 and does not reach the detection unit 5.
- the light outside the visible light region emitted from the light source unit 4a is totally reflected on the surface of the object 3 to be coated.
- the light slightly oozes out from the object 3 to the outside air side.
- the light of the exuded part is called evanescent light.
- the evanescent light is optically coupled with the optical substance contained in the object to be diffused to the outside of the object to be applied as indicated by reference numeral B in FIG. Since a part of the diffused light reaches the detection unit 5, for example, when the letter A (A) of the alphabet is drawn, the image frame recorded by the detection unit 5 is, for example, FIG. ) As shown.
- the portion of the shape of “A” that appears white and dark is the portion where the applied material is adhered on the substrate 3.
- the reflectance or diffusivity of the optical material with respect to light outside the visible light region needs to be high enough to enable the detection unit 5 to distinguish and record the portion where the coating is attached and the portion where the coating is not attached. There is.
- the image frame recorded by the detection unit 5 is sent to the processing unit 6 as in the first embodiment, and lens distortion correction processing, trapezoidal distortion correction processing, and brightness adjustment processing are executed.
- the correspondence as shown in FIG. 15 is used, and as a result, the image is reversed in black and white.
- an image similar to that shown in FIG. 5E is obtained.
- the basic configuration is as described above, but the configuration of the light source unit of the input device 1b and the configuration of the detection unit are different from those of the above embodiment. Will be described in detail with reference to FIG.
- the display unit is a flat panel display using liquid crystal technology, and is integrated with the detection unit.
- the light source unit 4b is a backlight of the flat panel display, and generates both visible light and light outside the visible light region.
- the optical material included in the coating 81 is substantially transparent (or translucent) to visible light, but reflects light outside the visible light region emitted from the light source unit 4b. It is a substance.
- FIG. 17 is a block diagram illustrating a configuration example of the light source unit 4b.
- the light source unit 4b includes a fluorescent tube 45 that generates both visible light and light outside the visible light region, and a diffuser 46 that uniformly diffuses the light generated by the fluorescent tube 45.
- the fluorescent tube 45 generates both visible light and light outside the visible light region, for example, infrared light.
- a general fluorescent lamp to which a halogen gas is added can be used.
- a device in which a visible light emitting diode (LED) and an infrared LED are arranged side by side may be used.
- the diffuser 46 may be a general diffusion plate used in a backlight of a liquid crystal display.
- an organic electroluminescent (EL) element etc. Can also be used.
- FIG. 18 is a block diagram illustrating a configuration example of the integrated display unit and detection unit 9.
- the integrated display unit and detection unit 9 includes two polarization filters 91 and 92, a photosensor built-in liquid crystal 93, and a control circuit 94.
- the polarizing filter 91 extracts only the linearly polarized light component that vibrates in a specific direction from the non-polarized visible light emitted from the light source unit 4b.
- the polarizing filter 92 extracts only linearly polarized light components orthogonal to the polarizing filter 91 from visible light that has passed through the polarizing filter 91 and the optical sensor built-in liquid crystal 93.
- the photosensor built-in liquid crystal 93 adjusts the polarization state of visible light in units of pixels according to the voltage applied by the control circuit 94, and the visible light emitted from the light source unit 4 b passes through the polarization filter 92. Controls whether it passes and is displayed on the front of the panel. Note that light outside the visible light region passes through a substantially constant amount regardless of the voltage applied by the control circuit 94. For example, in the case of a polarizing film and a liquid crystal material used for a general liquid crystal display, since almost constant infrared light passes regardless of the voltage applied by the control circuit 94, these can be used.
- the liquid crystal 93 with a built-in optical sensor includes a light receiving element that measures the intensity of light outside the visible light area in units of pixels, in addition to a liquid crystal element that adjusts the polarization state of visible light in units of pixels.
- the optical sensor built-in liquid crystal 93 includes a plurality of liquid crystal elements R, a liquid crystal element G, a liquid crystal element B, and a plurality of light receiving elements that adjust the polarization state of visible light in units of pixels.
- the liquid crystal element R, the liquid crystal element G, and the liquid crystal element B are provided with red, green, and blue color filters, respectively, so that light of each color can be controlled independently.
- the light receiving element 931 is an element in which a current flows according to the intensity of incident light outside the visible light region, and may be, for example, a silicon photodiode. More specifically, the photosensor built-in liquid crystal 93 used in the present embodiment can be configured by overlapping a visible light cut filter on a light receiving element portion of a general photosensor built-in liquid crystal. In the third embodiment, a plurality of light receiving elements 931 distributed over the entire display surface function as a detection unit.
- the light source unit 4b causes visible light and light outside the visible light region to enter from the back surface of the display unit and the detection unit 9.
- the control circuit 94 of the display unit and detection unit 9 controls the voltage applied to each pixel according to the intensity of each pixel of the image frame output from the processing unit 6 to display the image frame. Regardless of the voltage applied by the control circuit 94, light outside the visible light region passes through the display unit and the detection unit 9 and is incident on the coated body 3 regardless of the applied voltage. If it is assumed that the application object has not adhered to the object 3, light outside the visible light region passes through the object 3 as it is.
- the light receiving element 931 disposed in each pixel of the optical sensor built-in liquid crystal 93 measures light outside the visible light region incident on the pixel in units of pixels.
- the coated object is not attached to the coated body 3, light outside the visible light region passes through the coated body 3 and is radiated to the outside, so that it hardly enters the light receiving element 931.
- the image frame recorded by the detection unit becomes substantially dark as shown in FIG. 13A, for example, as in the second embodiment.
- the coating material adheres to the object 3 to be coated when the coating material adheres to the object 3 to be coated, light outside the visible light region is reflected by the optical material contained in the coating material and reaches the detection unit.
- the image frame recorded by the detection unit is, for example, as shown in FIG.
- the portion of the shape of “A” that appears white and dark is the portion where the applied material is adhered on the substrate 3.
- the reflectance of the optical material with respect to light outside the visible light region needs to be high enough to enable the detection unit to distinguish and record the portion where the coating is attached and the portion where the coating is not attached.
- the image frame recorded by the detection unit is sent to the processing unit as in the second embodiment, and brightness adjustment processing is executed.
- As a result of the processing of the processing unit an image similar to that shown in FIG. 5E is obtained.
- By displaying the image on the display unit the same effect as in the first and second embodiments can be obtained.
- the coating material is substantially transparent (or semi-transparent) to visible light, and includes a substance that absorbs, reflects, or diffuses light in the wavelength range of light emitted from the light source unit.
- a substance that absorbs, reflects, or diffuses light in the wavelength range of light emitted from the light source unit it is also possible to include as a component a substance that is almost opaque immediately after application, but then changes to a substantially transparent (or translucent) state.
- a reversible temperature ink containing a temperature-sensitive color-changing material that changes color with temperature can be used.
- the temperature change of the temperature-sensitive color change substance will occur after a certain period of time from the opaque state as the coated material adheres to the object to be coated and the temperature changes. It changes to a transparent (or translucent) state.
- a method for generating a temperature difference between the object to be coated and the outside air a method using waste heat generated from the display unit, or a thin film transparent electrode such as indium tin oxide (ITO) on the surface or back of the object to be coated It is conceivable to form a film and heat it by passing an electric current. Moreover, it is good also as a structure which comprises a to-be-coated body with a substance with a low specific heat, and utilizes the temperature change by the volatile solvent vaporization heat contained in a coating material.
- ITO indium tin oxide
- the optical substance contained in the application applied to the object is detected by the detection unit. Even if there is a slight delay before the image is displayed and displayed on the display unit, the user can quickly input a figure using the temperature-sensitive color-changing substance before color change as visual feedback. For this reason, with the handwriting input device of the present invention, even when there is a delay until display, the user inputs and erases characters and figures in the same manner as drawing with general ink that absorbs visible light. Will be able to. In dark places, the user cannot visually check the temperature-sensitive color-changing substance before color change. In this case, characters and figures are drawn relatively slowly at the expense of some input speed. Just do it.
- the basic configuration is as described above, but a configuration in which the characteristics of the coated product are different from those of the above-described embodiment will be described.
- a transparent (or translucent) substance in the visible light region is used as the application, but in this embodiment, an opaque application is always used regardless of the passage of time.
- the coated material includes an optical material having a property of absorbing, reflecting, or diffusing light outside the visible light region, and may further include a volatile solvent, a resin material, and a release material.
- the coating can be made opaque in the visible light region. it can. Also in this case, since the coated material absorbs, reflects, or diffuses light outside the visible light region, the method for detecting the coated material existing on the surface of the coated object is the same as in the first to third embodiments. This method can be used.
- the application is opaque, so that the user can directly observe characters and figures drawn with the application.
- the user when used in a dark place, the user cannot visually recognize the coating itself, but can observe characters and figures that are brightly bordered by the display behind the application. Thus, even if it is the structure using the opaque coating material in visible light region, the effect which can be used in both a bright place and a dark place is acquired.
- FIG. 22 is a block diagram illustrating a configuration of the handwriting input device according to the present embodiment.
- an outline of the above-described handwriting input device will be described.
- the handwriting input device 100 includes a transparent or semi-transparent object to be applied 101, a detection unit 102 that detects a position where the application object adheres on the object to be applied 101, and a detection Display means 103 for causing a visual change in accordance with the position at which the adhesion of the coating material is detected by means 102.
- the display means 103 causes a visual change in accordance with the position where adhesion of the coating material is detected. , You can recognize drawn characters and figures even in dark places.
- the information of handwritten characters and figures is stored as the distribution of the coating material physically attached to the coated object 101, so that the digital data should be lost by any chance. Even so, the loss of input information can be prevented.
- the handwriting input device of the present embodiment when there is no applied object physically attached to the object to be applied 101, the above-described visual change of the lost position does not occur. Disappears. For this reason, the handwritten character and figure can be erase
- the application material has a configuration that is transparent or translucent to visible light.
- the application material has an opaque property with respect to visible light.
- the structure is taken.
- the coating material has a property of changing from an opaque state to visible light to a transparent or translucent state with respect to visible light.
- the coated material contains a volatile solvent, and changes from a state opaque to visible light to a state transparent or translucent to visible light as the volatile solvent evaporates.
- the configuration is taken.
- the coating material is configured to change from an opaque state to visible light to a transparent or translucent state to visible light due to a temperature change.
- the application material adopts a configuration in which light outside the visible light region is absorbed, reflected, or diffused.
- the handwriting input device further includes a light source unit that causes light outside the visible light region to enter the object to be coated 101.
- the coated object 101 has a structure capable of guiding light outside the visible light region by confining the light outside the visible light region, and the light source unit is located outside the visible light region inside the coated object 101.
- the coated object 101 is optically coupled with a part of the light outside the visible light region confined on the surface of the coated object 101 to be outside the coated object 101.
- the display means 103 is a liquid crystal display, and the light source unit is a backlight of the liquid crystal display.
- the light source unit is a fluorescent tube that generates both visible light and light outside the visible light region.
- the handwriting input device adopts a configuration in which the coated object 101 is a protective panel arranged on the front surface of the display unit 103.
- the display means 103 is composed of a projector and a screen, and the substrate 101 is the screen itself or the substrate to which the screen is attached.
- the detection means 102 employs a configuration in which the position where the application object adheres on the object 101 is detected based on the spatial distribution of the incident intensity of light outside the visible light region.
- the detection means 102 includes a semiconductor image sensor.
- the detection unit 102 includes a plurality of sensors arranged in a distributed manner on the display unit 103.
- the senor is a silicon photodiode.
- the light outside the visible light region is infrared light.
- the detection means 102 adheres the coating material on the transparent or translucent object 101.
- the position is detected, and the display unit 103 adopts a configuration in which a visual change is generated in accordance with the position where the detection unit 102 detects the adhesion of the applied material.
- the coating material has a configuration that is transparent or translucent to visible light.
- the handwriting input method adopts a configuration in which the coated material has an opaque property with respect to visible light.
- the coating material has a property of changing from an opaque state to visible light to a transparent or translucent state with respect to visible light.
- FIG. 23 is a block diagram illustrating a configuration of the handwriting input device according to the present embodiment.
- an outline of the above-described handwriting input device will be described.
- the handwriting input device 200 includes a transparent or translucent object to be applied 101, a detection unit 102 that detects a position where the application object adheres on the object to be applied 101, and a display
- the apparatus 201 includes a processing unit 202 that outputs a signal for causing a visual change in accordance with a position where the detection unit 102 detects the adhesion of the coating.
- the processing unit 202 is positioned at the position where the coating is detected on the display device 201.
- the drawn character or figure is displayed on the display device 201 and can be recognized even in a dark place.
- the information of handwritten characters and figures is stored as the distribution of the applied material physically attached to the coated object 101, so that the digital data should be lost by any chance. Even so, the loss of input information can be prevented.
- the handwriting input device of the present embodiment when there is no applied object physically attached to the object to be applied 101, the above-described visual change of the lost position does not occur. Disappears. For this reason, the handwritten character and figure can be erase
- the application material has a configuration that is transparent or translucent to visible light.
- the handwriting input device adopts a configuration in which the coated material has an opaque property with respect to visible light.
- the coating material has a property of changing from an opaque state to visible light to a transparent or translucent state with respect to visible light.
- the coated material contains a volatile solvent, and changes from a state opaque to visible light to a state transparent or translucent to visible light as the volatile solvent evaporates.
- the configuration is taken.
- the coating material is configured to change from an opaque state with respect to visible light to a transparent or translucent state with respect to visible light due to a temperature change.
- the application material adopts a configuration in which light outside the visible light region is absorbed, reflected, or diffused.
- the above handwriting input device adopts a configuration in which a light source unit that makes light outside the visible light region incident on the object 101 is further provided.
- the object to be coated 101 has a structure capable of guiding light outside the visible light region by confining the light outside the visible light region, and the light source unit is outside the visible light region inside the object to be coated 101.
- the light is incident so as to be guided, and the coated material is optically coupled with a part of the light outside the visible light region confined on the surface of the coated object 101 to be outside the coated object 101.
- the detection means 102 employs a configuration in which the position where the application object adheres on the object 101 is detected based on the spatial distribution of the incident intensity of light outside the visible light region.
- the detection means 102 includes a semiconductor image sensor.
- the light outside the visible light region is infrared light.
- the detection means 102 adheres the coating material on the transparent or translucent object 101.
- a configuration is adopted in which the position is detected, and the processing unit 202 outputs a signal for causing a visual change to the display device 201 in accordance with the position where the detection unit 102 detects the adhesion of the coating.
- the coating material has a configuration that is transparent or translucent to visible light.
- the handwriting input method adopts a configuration in which the coated material has an opaque property with respect to visible light.
- the coating material has a property of changing from an opaque state to visible light to a transparent or translucent state with respect to visible light.
- Optical sensor built-in liquid crystal 931 ... Light receiving elements # 1 to # 4 ... LED R, G, B ... Liquid crystal elements C1 to C48, C1 'to C48' ... Loop coil 221X ... X direction selection circuit 221Y ... Y direction selection circuit 222X ... X direction connection switching circuit 222Y ... Y direction connection switching circuit 223 ... Transmission circuit 224 ... Reception circuit 225 ... Processing device 226 ... Position indicator 227 ... Tuning circuit 228 ... Display device
Abstract
Description
次に、本発明の第1の実施の形態について図面を参照して詳細に説明する。
図1を参照すると、本発明の入力装置1は、記憶装置7に接続されており、プロジェクタ21およびスクリーン22により構成される表示部2、塗布物が付着・除去される被塗布体3、光源部4、検出部5、および処理部6で構成される。
Metal Oxide Semiconductor)イメージセンサなどの半導体イメージセンサを搭載したカメラが使用できる。
次に、図1の手書き入力装置の動作について、図面を参照して詳細に説明する。
本発明の第2の実施の形態として、その基本的構成は前記の通りであるが、入力装置1aの光源部の配置、表示部の構成、および塗布物の特性が第1の実施の形態とは異なる構成について、図面を参照して詳細に説明する。
本発明の第3の実施の形態として、その基本的構成は前記の通りであるが、入力装置1bの光源部の構成、および検出部の構成が前記の実施の形態とは異なる構成について、図面を参照して詳細に説明する。
なお、前記すべての説明にて、塗布物は、可視光に対してはほぼ透明(または半透明)で、また光源部の発する光の波長領域では光を吸収、反射もしくは拡散する物質を含む構成としたが、これ以外にも、塗布直後にはほぼ不透明な状態であるが、その後ほぼ透明(または半透明)な状態に変化する物質を成分として含むこともできる。このような物質としては、例えば、温度で変色する感温変色物質の含まれる可逆性示温度インクが使用できる。この場合、被塗布体に外気との間に温度差が存在すれば、塗布物が被塗布体に付着して温度が変化することに伴い、感温変色物質は不透明な状態から一定時間経過後に透明(または半透明)な状態へと変化する。
本発明の第4の実施の形態として、その基本的構成は前記の通りであるが、塗布物の特性が前記の実施の形態とは異なる構成について説明する。前記の各実施の形態では、塗布物として、可視光領域で透明(または半透明)な物質を用いたが、本実施の形態では、時間の経過にかかわらず常に不透明な塗布物を用いる。前述の通り、塗布物は、可視光領域以外の光を吸収、反射、もしくは拡散する性質を有する光学物質を含み、さらに、揮発性溶剤、樹脂材料、剥離材を含んでいても良い。これらの構成要素の少なくとも1つに可視光領域で不透明な物質を使用するか、もしくは可視光領域で不透明な物質を別途成分として追加することで、塗布物を可視光領域で不透明にすることができる。この場合も、塗布物は可視光領域以外の光を吸収、反射、もしくは拡散するため、被塗布体の表面に存在する塗布物を検出する方法として、第1乃至第3の実施の形態と同様の方法を用いることができる。
次に、本発明の第5の実施の形態を図22を参照して説明する。図22は、本実施の形態における手書き入力装置の構成を示すブロック図である。なお、本実施の形態は、上述した手書き入力装置の概略を説明する。
という構成を採る。
次に、本発明の第6の実施の形態を図23を参照して説明する。図23は、本実施の形態における手書き入力装置の構成を示すブロック図である。なお、本実施の形態は、上述した手書き入力装置の概略を説明する。
2、2a…表示部
21…プロジェクタ
22…スクリーン
3…被塗布材
4、4a、4b…光源部
41…電源回路
42…駆動回路
43、44…赤外発光ダイオード(LED)
45…蛍光管
46…拡散体
5…検出部
51…カメラモジュール
52…CCD
53…インターフェース部
54…レンズ部
55…可視光カットフィルタ
6…処理部
7…記憶装置
8…塗布具
81…塗布物
82…ハウジング
83…フェルト材
84…キャップ
9…表示部および検出部9
91、92…偏光フィルタ
93…光センサ内蔵液晶
931…受光素子
#1~#4…LED
R、G、B…液晶素子
C1~C48、C1'~C48'…ループコイル
221X…X方向選択回路
221Y…Y方向選択回路
222X…X方向接続切替回路
222Y…Y方向接続切替回路
223…送信回路
224…受信回路
225…処理装置
226…位置指示器
227…同調回路
228…表示デバイス
Claims (38)
- 透明または半透明な被塗布体と、
前記被塗布体上において塗布物の付着する位置を検出する検出手段と、
前記検出手段で塗布物の付着が検出された位置に合わせて視覚的変化を生じる表示手段と、
を備えることを特徴とする手書き入力装置。 - 前記塗布物は、可視光に対して透明または半透明な性質を有する、
ことを特徴とする請求項1に記載の手書き入力装置。 - 前記塗布物は、可視光に対して不透明な性質を有する、
ことを特徴とする請求項1に記載の手書き入力装置。 - 前記塗布物は、可視光に対して不透明な状態から可視光に対し透明または半透明な状態に変化する性質を有する、
ことを特徴とする請求項1に記載の手書き入力装置。 - 前記塗布物は、揮発性溶剤を含み、前記揮発性溶剤の気化に伴い、可視光に対して不透明な状態から可視光に対し透明または半透明な状態に変化する、
ことを特徴とする請求項4に記載の手書き入力装置。 - 前記塗布物は、温度変化により、可視光に対して不透明な状態から可視光に対し透明または半透明な状態に変化する、
ことを特徴とする請求項4に記載の手書き入力装置。 - 前記塗布物は、可視光領域外の光を吸収、反射、もしくは拡散する、
ことを特徴とする請求項1乃至6の何れか1項に記載の手書き入力装置。 - 可視光領域外の光を前記被塗布体に入射させる光源部を更に備える、
ことを特徴とする請求項7に記載の手書き入力装置。 - 前記被塗布体は、可視光領域外の光を内部に閉じこめて導波可能な構造を有し、
前記光源部は、前記被塗布体の内部に可視光領域外の光を閉じこめて導波させるように入射させ、
前記塗布物は、前記被塗布体の表面において閉じこめられた可視光領域外の光の一部と光学的に結合して前記被塗布体の外に拡散させる、
ことを特徴とする請求項8に記載の手書き入力装置。 - 前記表示手段は、液晶ディスプレイであり、
前記光源部は、前記液晶ディスプレイのバックライトである、
ことを特徴とする請求項8に記載の手書き入力装置。 - 前記光源部は、可視光および可視光領域外の光の両方を発生する蛍光管である、
ことを特徴とする請求項10に記載の手書き入力装置。 - 前記被塗布体は、前記表示手段の前面に配置される保護パネルである、
ことを特徴とする請求項1乃至11の何れか1項に記載の手書き入力装置。 - 前記表示手段は、プロジェクタとスクリーンとで構成され、
前記被塗布体は、前記スクリーンそのもの、もしくは前記スクリーンの貼り付けられた基材である、
ことを特徴とする請求項1乃至9の何れか1項に記載の手書き入力装置。 - 前記検出手段は、可視光領域外の光の入射強度の空間分布により、前記被塗布体上において塗布物の付着する位置を検出する、
ことを特徴とする請求項7乃至13の何れか1項に記載の手書き入力装置。 - 前記検出手段は、半導体イメージセンサを備える、
ことを特徴とする請求項14に記載の手書き入力装置。 - 前記検出手段は、前記表示手段に分散して配置される複数のセンサを備える、
ことを特徴とする請求項14に記載の手書き入力装置。 - 前記センサは、シリコンフォトダイオードである、
ことを特徴とする請求項16に記載の手書き入力装置。 - 前記可視光領域外の光は、赤外光である、
ことを特徴とする請求項7乃至17の何れか1項に記載の手書き入力装置。 - 透明または半透明な被塗布体と、
前記被塗布体上において塗布物の付着する位置を検出する検出手段と、
表示装置に対して、前記検出手段で塗布物の付着が検出された位置に合わせて視覚的変化を生じるための信号を出力する処理部と、
を備えることを特徴とする手書き入力装置。 - 前記塗布物は、可視光に対して透明または半透明な性質を有する、
ことを特徴とする請求項19に記載の手書き入力装置。 - 前記塗布物は、可視光に対して不透明な性質を有する、
ことを特徴とする請求項19に記載の手書き入力装置。 - 前記塗布物は、可視光に対して不透明な状態から可視光に対し透明または半透明な状態に変化する性質を有する、
ことを特徴とする請求項19に記載の手書き入力装置。 - 前記塗布物は、揮発性溶剤を含み、前記揮発性溶剤の気化に伴い、可視光に対して不透明な状態から可視光に対し透明または半透明な状態に変化する、
ことを特徴とする請求項22に記載の手書き入力装置。 - 前記塗布物は、温度変化により、可視光に対して不透明な状態から可視光に対し透明または半透明な状態に変化する、
ことを特徴とする請求項22に記載の手書き入力装置。 - 前記塗布物は、可視光領域外の光を吸収、反射、もしくは拡散する、
ことを特徴とする請求項19乃至24の何れか1項に記載の手書き入力装置。 - 可視光領域外の光を前記被塗布体に入射させる光源部を更に備える、
ことを特徴とする請求項25に記載の手書き入力装置。 - 前記被塗布体は、可視光領域外の光を内部に閉じこめて導波可能な構造を有し、
前記光源部は、前記被塗布体の内部に可視光領域外の光を閉じこめて導波させるように入射させ、
前記塗布物は、前記被塗布体の表面において閉じこめられた可視光領域外の光の一部と光学的に結合して前記被塗布体の外に拡散させる、
ことを特徴とする請求項26に記載の手書き入力装置。 - 前記検出手段は、可視光領域外の光の入射強度の空間分布により、前記被塗布体上において塗布物の付着する位置を検出する、
ことを特徴とする請求項25乃至27の何れか1項に記載の手書き入力装置。 - 前記検出手段は、半導体イメージセンサを備える、
ことを特徴とする請求項28に記載の手書き入力装置。 - 前記可視光領域外の光は、赤外光である、
ことを特徴とする請求項25乃至29の何れか1項に記載の手書き入力装置。 - 検出手段が、透明または半透明な被塗布体上において塗布物の付着する位置を検出し、
表示手段が、前記検出手段で塗布物の付着が検出された位置に合わせて視覚的変化を生じる
ことを特徴とする手書き入力方法。 - 前記塗布物は、可視光に対して透明または半透明な性質を有する、
ことを特徴とする請求項31に記載の手書き入力方法。 - 前記塗布物は、可視光に対して不透明な性質を有する、
ことを特徴とする請求項31に記載の手書き入力方法。 - 前記塗布物は、可視光に対して不透明な状態から可視光に対し透明または半透明な状態に変化する性質を有する、
ことを特徴とする請求項31に記載の手書き入力方法。 - 検出手段が、透明または半透明な被塗布体上において塗布物の付着する位置を検出し、
処理手段が、表示装置に対して、前記検出手段で塗布物の付着が検出された位置に合わせて視覚的変化を生じるための信号を出力する
ことを特徴とする手書き入力方法。 - 前記塗布物は、可視光に対して透明または半透明な性質を有する、
ことを特徴とする請求項35に記載の手書き入力方法。 - 前記塗布物は、可視光に対して不透明な性質を有する、
ことを特徴とする請求項35に記載の手書き入力方法。 - 前記塗布物は、可視光に対して不透明な状態から可視光に対し透明または半透明な状態に変化する性質を有する、
ことを特徴とする請求項35に記載の手書き入力方法。
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JP2011509181A JP5569520B2 (ja) | 2009-04-16 | 2010-03-03 | 手書き入力装置 |
US13/264,123 US9213446B2 (en) | 2009-04-16 | 2010-03-03 | Handwriting input device |
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JP2009099574 | 2009-04-16 | ||
JP2009-099574 | 2009-04-16 |
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US9213446B2 (en) | 2015-12-15 |
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