Abstract: An electromagnetic pointer control method includes the following steps. Firstly, an electromagnetic pointer is applied upon an electromagnetic input device. Then, a coordinate moving distance Lt of the electromagnetic pointer is calculated. The coordinate moving distance Lt is sampled and differentiated to obtain a coordinate displacement It. A coordinate sampling length ? is calculated by the coordinate displacement It. Next, an actual moving distance m is calculated according to ?, a unit ? of the actual moving distance, a predetermined unit transformation gain ? and a coordinate resolution R. Then, m is differentiated to obtain an acceleration variation T. Next, T is integrated to obtain an integrated distance M. Finally, a tip pressure of the electromagnetic pointer pre is calculated according to M, a predetermined maximum tip pressure premax, a predetermined minimum tip pressure premin, and a predetermined moving distance DM.

Abstract: The invention disclosed an electromagnetic pointer control method, the method comprising the following steps. First of all, an electromagnetic pointer is applied upon an electromagnetic input apparatus. Then a corresponding distance table is generated according to the moving distance of electromagnetic pointer upon the electromagnetic input apparatus, and a pressure gradient value range corresponding to the distance table is generated. Finally, a tip pressure of the electromagnetic pointer is calculated according to a maximum pressure gradient value in the pressure gradient value range and a pressure gradient value corresponding to the moving distance of electromagnetic pointer.

Abstract: A method for determining an incline angle of electromagnetic pointer is disclosed. The method comprises the following steps. First of all, an electromagnetic input pen/stylus is provided over antennas Xn/Yn along X/Y axes. Then a plurality of antennas at two sides of the antennas Xn/Yn are scanned. Next the signal distributions of the antennas Xn/Yn and the antennas at two side are analyzed. Then the number of antenna sampled of the signal distributions of the antennas at two side is determined. Next the antennas at two side are selected and the signal distributions are sampled and received according to the number of antenna sampled. Finally, an incline angle of the electromagnetic pointer is determined according to the sampled signal distributions.

Abstract: An electromagnetic pressure-sensitive pointer is disclosed. The electromagnetic pointer comprises a pen core and an oscillating circuit. The pointer core has a pointer tip. The oscillating circuit comprises a plurality of conductive terminals and a conductor. A capacitance of the oscillating circuit is increased through the contact between the conductive terminals and the conductor as a force is applied upon the pointer tip. When pointer's tip is been pressed, the pointer's frequency will have an obvious transition while its pressure-sensitivity is maintained.

Abstract: An electromagnetic pointer is disclosed. The electromagnetic pointer includes at least one pen tube assembly, a pen tip, a core holder configured in the pen tube assembly with a surrounding coil, a ferrite core, an elastomer, a touch pin configured in the core holder and the pen tube assembly and a circuit board.

Abstract: An electromagnetic pen with electromagnetic and ink writing functions is disclosed. The electromagnetic pen includes at least one pen tube assembly, a core mechanism, a pen tip, a ferrite core, a core holder, an elastic conductor and a circuit board. The pen tip and the core are configured in the pen tube assembly and are controlled by the core mechanism.

Abstract: The present invention relates to a layout for antenna loops having both functions of capacitance induction and electromagnetic induction, and particularly relates to the layout for antenna loops having both functions of capacitance induction and electromagnetic induction, wherein the capacitance detection elements are integrated with the antenna loops. In this layout for antenna loops, each of the antenna loops therein is separated into three sections, and there are several geometric structures fabricated in two of these sections. These geometric structures are capacitance detection elements. Therefore, the two sections are directly fabricated to be the capacitance detection elements because of these geometric structures. By this way, the antenna loops can be integrated with the capacitance detection elements and the capacitance detection elements do not prevent the antenna loops from receiving the electromagnetic signals.

Abstract: An electromagnetic pointer is disclosed. The electromagnetic pointer comprises a pen holder assembly, a circuit board, a metal rod, a ferrite core with coils and a trigger device. The diameter of the pen holder assembly is less than 6 mm. The circuit board comprises a resonance circuit. The metal rod has a low permeability. The ferrite core with coil constitutes an inductor and the coil electrically connects to the circuit board through a conductive wire to complete the resonance circuit. The ferrite core has a hollow center so that the metal rod can move through to trigger the trigger device and change electric properties of the resonance circuit.

Abstract: An input apparatus with integrated detection sections of electromagnetic type and capacitive type is disclosed. The apparatus comprises a substrate, a control device and at least one signal processing device on the substrate. The substrate comprises an electromagnetic sensor coil layout and a capacitive sensor layout.

Abstract: An electromagnetic pointer with a new type adjustment structure is disclosed. The electromagnetic pointer comprises at least one pen tube assembly, a tuning component at one end of the pen tube assembly, a pen tip, a core holder configured in the pen tube assembly with a surrounding coil, a ferrite core, an elastomer, a touch pin configured in the core holder and the pen tube assembly and a circuit board. The tuning component is configured to move axially along the pen tube assembly to perform tuning.

Abstract: The present invention relates to a new electromagnetic pen without a battery, and particularly relates to a new electromagnetic pen without a battery, which has two coils inside. An oscillator circuit and a resonance circuit are formed in the new electromagnetic pen respectively by the two coils. The oscillator circuit is formed for emitting electromagnetic signals to a tablet, and the resonance circuit is formed for receiving the electromagnetic energy emitted from the tablet. Therefore, unlike the conventional electromagnetic pen without a battery, which only receive the electromagnetic energy and emit the electromagnetic signals in a short period, the new electromagnetic pen of this invention can receive the electromagnetic energy emitted from the tablet continuously, so the oscillator circuit can emit the electromagnetic signals to the tablet continuously.

Abstract: Method for frequency detection and detecting variation of frequency is disclosed. The method comprises the following steps. First of all, a pointer is provided over an electromagnetic position detection apparatus, wherein the pointer emits an electromagnetic signal with a frequency f1. Next a base integration signal is generated according to the integration of the electromagnetic signal with the frequency f1 for a current integration period x. Then a current integration signal is generated according to the integration of the electromagnetic signal with the frequency f1 for the current integration period x and a predetermined electromagnetic signal with a predetermined frequency f0 for the predetermined integration period y. Finally, a frequency variation value ?f between the frequency f1 and a current frequency fc is calculated and obtained according to the current integration signal and the base integration signal.

Abstract: A handwriting input apparatus used with an electromagnetic pen is disclosed. The handwriting input apparatus comprises a controller, an electromagnetic antenna board, a signal processing circuit and a charging circuit. The signal processing circuit processes the electromagnetic signals received by the electromagnetic antenna board. The charging circuit used to charge the electromagnetic pen includes a first device which is used to output a first voltage to charge the electromagnetic pen after a voltage of the handwriting input apparatus being inputted. The charging circuit further includes a programmable voltage device connecting to the first device. The programmable voltage device is controlled by the controller to change the first voltage according to the detection of the first voltage by the controller.

Abstract: An angle correcting method for a position pointer induced by a handwritten input device is disclosed. The steps of the method includes: firstly, an inclined angle table is provided. Then, a first induced voltage amplitude of a first position where the position pointer touches and a second induced voltage amplitude of a second position where is near to the first position are induced. The ratio of the first induced voltage amplitude to the second induced voltage amplitude is calculated to generate an amplitude ratio. Finally, the inclined angle table is looked up to find an inclined angle according to the amplitude ratio.

Abstract: An embodiment of the present invention provides a stylus as an inputting device of a handwriting system. The stylus comprises a jog ball, a signal emitting circuit for emitting electromagnetic waves, an resonant circuit for determining the frequencies of the emitting electromagnetic waves, and a button and ball circuit that comprises a pair of sensing units respectively arranged at up and down side of the jog ball for tracking the rolling of the jog ball.

Abstract: An antenna loop layout method for an electromagnetic sensor board is provided. The electromagnetic sensor board has a plurality of inductive antennas which are arranged abreast of each other. One end of the inductive antennas is coupled to each other, and the other end of the inductive antennas have a switch. The method comprises the following steps: first, a pre-determined interval value is provided. Then, the switches are closed in sequence by the pre-determined interval value to form a plurality of physical antenna loops. The pre-determined interval value can be changed dynamically.

Abstract: The present invention relates to a multi-function electromagnetic pen, and particularly relates to an electromagnetic pen with a multi-function tail part. This electromagnetic comprises a body, a pen-tip part, and a multi-function electromagnetic ring. The pen-tip part is disposed on the front part of the electromagnetic pen and the multi-function electromagnetic ring is disposed on the tail part (or rear end part) of the electromagnetic pen. The multi-function electromagnetic ring can emit different electromagnetic signals with different frequencies. These electromagnetic signals with different frequencies are defined by a tablet to represent different functions (or modes), for example erasing function (or mode), magnifying function (or mode), and palette knife function (or mode). A user can control and change the frequency of the electromagnetic signal emitted form the multi-function electromagnetic ring by pressing the switch on the body of the electromagnetic pen.

Abstract: An integrated electromagnetic type input flat panel display apparatus is disclosed. The integrated electromagnetic type input flat panel display apparatus comprises a display panel, a control unit and a signal processing unit. The display panel has a display unit and an electromagnetic sensor unit, wherein the display unit and the electromagnetic sensor unit are integrated in to a substrate of the display panel. The signal processing unit receives and processes the signals from the electromagnetic sensor unit.