Abstract: An electronic erasing device includes a casing, an erasing portion slidably attached to the casing and having a bottom surface and a side surface that extends from an outer edge of the bottom surface, both the bottom surface and at least a part of the side surface protruding from an end of the casing, and a position indicator including a core body and a pressure detector that detects a pressure applied to the core body, the position indicator outputting a position indication signal indicating an erasure position indicated by the core body and information indicating the pressure. The position indicator is included in the erasing portion and fixed inside the casing such that a tip portion of the core body is positioned away from an outer side of the bottom surface of the erasing portion and the applied pressure is transmitted to the core body.

Abstract: A method is provided for adjusting the resonance frequency of a resonance circuit included in an electronic pen. The method uses adjusting means for adjusting the capacitance of an internal capacitor array and measuring means for measuring an alternating magnetic field generated by the resonance circuit. The method includes (1) a step of changing the state of a predetermined portion of multiple capacitive elements constituting the internal capacitor array, and (2) a step of changing, according to reference resonance frequency variations of the resonance circuit before and after the state change, the state of a portion or all of at least one capacitive element constituting the inner capacitor array other than said predetermined portion of the capacitive elements.

Abstract: An integrated circuit includes a first terminal that is connected to a first end of a first capacitor, the first capacitor being included in a resonant circuit, a second terminal that is connected to a second end of the first capacitor, a plurality of second capacitors connected in parallel between the first and second terminals, and a control circuit which, in operation, changes a capacitance of each of the second capacitors. An electronic pen includes the integrated circuit and a first capacitor having a capacitance that varies based on pressure applied to a nib of the electronic pen.

Abstract: An electronic erasing device includes a casing, an erasing portion slidably attached to the casing and having a bottom surface and a side surface that extends from an outer edge of the bottom surface, both the bottom surface and at least a part of the side surface protruding from an end of the casing, and a position indicator including a core body and a pressure detector that detects a pressure applied to the core body, the position indicator outputting a position indication signal indicating an erasure position indicated by the core body and information indicating the pressure. The position indicator is included in the erasing portion and fixed inside the casing such that a tip portion of the core body is positioned away from an outer side of the bottom surface of the erasing portion and the applied pressure is transmitted to the core body.

Abstract: An integrated circuit includes a first terminal that is connected to a first end of a first capacitor, the first capacitor being included in a resonant circuit, a second terminal that is connected to a second end of the first capacitor, a plurality of second capacitors connected in parallel between the first and second terminals, and a control circuit which, in operation, changes a capacitance of each of the second capacitors. An electronic pen includes the integrated circuit and a first capacitor having a capacitance that varies based on pressure applied to a nib of the electronic pen.

Abstract: This audio image control method controls the localization of an audio image in a space between a headphone/speaker and the auricle. Rearward sound emitted from the headphone/speaker at a position corresponding to the rear of the auricle and traveling toward the auricle is blocked and reflected to travel away toward the front of the auricle. The reflected rearward sound is reflected together with forward scattering sound emitted from the headphone/speaker at a position forwardly of the auricle and travelling away from the auricle, and is allowed to reach the auricle as reflected forward sound travelling from the front of the auricle toward the auricle. Central sound emitted from the central portion of the headphone/speaker and travelling toward the auricle, and emitted forward sound emitted from the headphone/speaker at a position corresponding to the front of the auricle and traveling toward the auricle are allowed to reach the auricle directly.

Abstract: Provided is an electronic pen core body including a tip component portion coupled to an axis component portion. At least one end of the axis component portion in an axial direction is made of a material that is harder than a material from which the tip component portion is made. The axis component portion includes a recessed hole and a fitting portion directly or indirectly fitted to a pen pressure detector. The tip component portion includes a tip portion protruding from the one end of the axis component portion in the axial direction, a coupling core portion disposed within the recessed hole and coupled to an inner wall surface of the recessed hole of the axis component portion, and a second ring-shaped end surface that contacts a first ring-shaped end surface of the axis component portion. The first ring-shaped end surface is covered by the second ring-shaped end surface.

Abstract: A learning support system includes: an electronic pen, a writing medium position instruction tool, a position detection apparatus, and a display apparatus. The electronic pen is capable of recording handwriting and transmitting a position instruction signal. The position detection apparatus determines a position of a note provided with the writing medium position instruction tool on a position detection sensor incorporated in a desk mat based on a placement position instruction signal from the writing medium position instruction tool, converts coordinates of coordinate information corresponding to handwriting recorded on the note by the electronic pen, and displays an image corresponding to the handwriting recorded on the note on a display terminal and a teacher terminal in a mode recorded on the note. The learning support system enables an educator to determine a situation of a learner to contribute to an increase effectiveness of learning.

Abstract: A learning support system includes: an electronic pen, a writing medium position instruction tool, a position detection apparatus, and a display apparatus. The electronic pen is capable of recording handwriting and transmitting a position instruction signal. The position detection apparatus determines a position of a note provided with the writing medium position instruction tool on a position detection sensor based on a placement position instruction signal from the writing medium position instruction tool, converts coordinates of coordinate information corresponding to handwriting recorded on the note by the electronic pen, and displays an image corresponding to the handwriting recorded on the note on a display terminal and a teacher terminal in a mode recorded on the note. The learning support system enables an educator to determine a situation of a learner to contribute to an increase effectiveness of learning.

Abstract: An electronic pen main body unit of an electronic pen having a function of a fountain pen includes an ink writing unit in which a cartridge housing liquid ink is fitted to a rear end portion of a pen core, and a pen body is disposed so as to be superposed on the pen core in a direction orthogonal to a coupling direction of the pen core and the cartridge, and an interaction circuit having an electronic part which, in operation, exchanges a signal with a tablet. The interaction circuit is disposed on a side of the pen core opposite the pen body in the direction orthogonal to the coupling direction of the pen core and the cartridge in a state in which the interaction circuit recedes to the cartridge side from a writing end of the pen body in the coupling direction of the pen core and the cartridge.

Abstract: The present invention addresses the problem of providing a surface protective film which is resistant to discoloration, expansion and the like caused by the penetration of a plasticizer. A surface protective film having, on the outermost surface thereof, a protective layer made of polycarbonate type polyurethane is provided as the solution of the problem.

Abstract: An electronic erasing device includes a casing, an erasing portion slidably attached to the casing and having a bottom surface and a side surface that extends from an outer edge of the bottom surface, both the bottom surface and at least a part of the side surface protruding from an end of the casing, and a position indicator including a core body and a pressure detector that detects a pressure applied to the core body, the position indicator outputting a position indication signal indicating an erasure position indicated by the core body and information indicating the pressure. The position indicator is included in the erasing portion and fixed inside the casing such that a tip portion of the core body is positioned away from an outer side of the bottom surface of the erasing portion and the applied pressure is transmitted to the core body.

Abstract: The present invention addresses the problem of providing a surface protective film laminate, surface protective film and its producing method. The surface protective film which has excellent smoothness, light transmission properties, transparency, scratch resistance, weather resistance and self-healing properties. The present invention provides, as a solution, a surface protective film wherein three layers, namely, a protective layer, a transparent base film and a pressure-sensitive adhesive layer are laminated in this order, said protective layer being formed of a thermosetting polyurethane which is a cured product of a polyether polyol, an aliphatic isocyanate, an alcohol-based curing agent and a non-amine catalyst.

Abstract: A digital input device includes a sensor that detects an electronic pen and outputs coordinates according to positions pointed by the electronic pen, a display device, an operation button, a processor, and a storage device storing a program that causes the digital input device to: display, on the display device, a predetermined template according to a format indicated by template data and inputted information according to the position pointed by the electronic pen and received via the sensor; provide timepoint information at each timepoint, generate pieces of time-series data based on the timepoint information provided at each timepoint, each of the pieces of the time-series data including: a timepoint value indicated by the timepoint information, coordinate values indicated by the coordinates output from the sensor, a writing pressure value, and a button status value; and store answer information and correction information in association with the template data indicating the format.

Abstract: The present invention addresses the problem of providing a surface protective film that makes it possible to cut blue light and has exceptional durability. As a solution, the present invention provides a surface protective film in which at least four layers comprising a protective layer made of polyurethane, a transparent substrate film, a blue light cutting layer, and an adhesive layer are laminated in the stated order.

Abstract: A pen input device sheet, which contacts a tip part of a core body of an electronic pen for a pen input device, includes a resin film layer. A diameter of the tip part is SR. An amount of sinking of the resin film layer is ? and a coefficient of kinetic friction between the resin film layer and the tip part is ?, which change according to a load when the tip part is in contact with the pen input device sheet. When the load applied to the tip part of the core body is changed and corresponding measurements are taken, and the measurements plotted with ? allocated to an ordinate axis and a ratio of ?/SR is allocated to an abscissa axis, a fitted straight line plotted based on the measurements has a proportional relation corresponding to a proportional relation between ? and the ratio of ?/SR.

Abstract: A digital input device includes a sensor that detects coordinates according to a position pointed by an electronic pen; a display device disposed on a side of the sensor; at least one operation button; at least one processor; at least one storage device storing at least one program. When the at least one program is executed by the at least one processor, the display device displays a predetermined template and inputted information by an electronic pen as received via the sensor. The digital input device also provides timepoint information at every predetermined timing, and generates and stores time-series data with position information from the sensor according to pointing to the template by the electronic pen, the time-series data including information regarding the electronic pen received from the electronic pen associated with operation information indicating a state of the at least one operation button at timepoints indicated by the timepoint information.

Abstract: An integrated circuit includes a first terminal that is connected to a first end of a first capacitor, the first capacitor being included in a resonant circuit, a second terminal that is connected to a second end of the first capacitor, a plurality of second capacitors connected in parallel between the first and second terminals, and a control circuit which, in operation, changes a capacitance of each of the second capacitors. An electronic pen includes the integrated circuit and a first capacitor having a capacitance that varies based on pressure applied to a nib of the electronic pen.