TWI420377B - Pointing device for coordinate detecting system supporting operation of multiple pointing devices - Google Patents

Description

Index component supporting coordinate positioning system for multi-index components

The present invention relates to an index component for use in a coordinate positioning system, and more particularly to an index component for use in a coordinate positioning system that supports multiple index components.

Conventional coordinate elements using a plurality of index elements such as electromagnetic input pens or electromagnetic inductive input devices such as digitizers typically use different resonant frequencies to resonate with resonance circuits of different index elements for electromagnetic The high-frequency electromagnetic signals between the antenna or the induction coil of the induction input device and the resonant circuit of the index component are transmitted and received without interfering with each other, so that different index components can be simultaneously operated on the electromagnetic induction input device. However, using different frequencies to provide multiple indicator elements for simultaneous operation typically requires more than two frequencies to be generated in a manner that increases the hardware components to provide multiple indicator component signals for simultaneous operation. For example, when multiple index components are used simultaneously, data and signal exchange between a specific index component and an electromagnetic induction input device A corresponding hardware component or circuit must be used to selectively establish signal communication with a particular indicator component, which adds additional hardware cost and complexity.

In view of the above-mentioned shortcomings of the conventional electromagnetic induction input device, the present invention proposes an index component applied to a coordinate positioning system supporting multiple index components to support a coordinate positioning system in which multiple index components are simultaneously operated, without adding an additional coordinate positioning system. Hardware cost and complexity.

The purpose of the invention is to use the trigger signal to trigger the control unit, so that different indicator components sequentially delay the transmission of the signal, and the electromagnetic induction board transmits signals in sequence in each time interval, and the electromagnetic induction board is sequentially emitted by the electromagnetic induction board. According to the setting, each index component is identified and separately calculated to determine the coordinates of each index component. Therefore, the coordinate information of the multi-index component can be obtained under the existing hardware architecture, and the coordinate positioning system supporting the multi-index component can be completed.

According to the above object, the present invention provides an index component for a coordinate positioning system for supporting a multi-index component, the indicator component comprising a control unit, a monitoring unit, an oscillating unit and a power source. The oscillating unit detects an electromagnetic induction board trigger signal from the electromagnetic induction board of the coordinate positioning system. The monitoring unit generates a trigger signal according to one of the oscillating units. The control unit receives the trigger signal, and after a delay time, controls the oscillating unit to emit an electromagnetic signal and maintain a signal transmission time. The voltage and power of the power supply control unit, the oscillating unit and the monitoring unit.

The present invention also proposes an index component that is applied to a coordinate positioning system that supports multiple indicator components without a power supply. Indicator component includes, a monitoring unit and a control list yuan. The resonance unit resonates with an electromagnetic wave signal emitted from an electromagnetic induction plate, and stores the electromagnetic wave signal as an electric energy through a resonant energy storage time. The monitoring unit generates a trigger signal according to one of the sensing signals of the resonant unit. The control unit receives the trigger signal, and the resonant unit transmits a first electromagnetic signal and maintains a signal transmission time via a first delay time, wherein the power supply and drives the control unit, the resonance unit and the monitoring unit.

102‧‧‧Control unit

106‧‧‧Oscillation unit

104‧‧‧Monitoring unit

108‧‧‧Power Management Unit

110‧‧‧Power supply

302‧‧‧Control unit

304‧‧‧Monitoring unit

306‧‧‧Resonance unit

The first figure shows a functional block diagram of an indicator component of one embodiment of the present invention.

The second figure shows a timing diagram of transmitting electromagnetic wave signals at different time points after receiving the trigger signal by a plurality of index components according to an embodiment of the present invention.

The third figure shows a functional block diagram of an indicator element of one embodiment of the present invention.

The fourth figure shows a timing diagram of the electromagnetic wave signals emitted by different index components at different time points after receiving the trigger signal by another index component according to another embodiment of the present invention.

The fifth figure shows a timing diagram of the electromagnetic wave signals emitted by different index components at different time points after receiving the trigger signals according to an embodiment of the present invention.

Some embodiments of the invention are described in detail below. However, the present invention may be widely practiced in other embodiments than the following description, and the scope of the present invention is not limited by the examples, which are subject to the scope of the following patents. Furthermore, to provide a clearer description and a better understanding of the present invention, the various parts of the drawings are not drawn according to their relative dimensions, and some dimensions have been exaggerated compared to other related dimensions; the irrelevant details are not fully Draw, in order to make the schema simple.

The first figure shows a functional block diagram of an indicator component of one embodiment of the present invention. The pointing device contains an electromagnetic pen. Referring to the first figure, the indicator component includes a control unit 102, a monitoring unit 104, an oscillation unit 106, a power management unit 108, and a power source 110. . The indicator component shown in the first figure is an indicator component of the self-contained power source, and the power source 110 includes a battery, but is not limited to a battery. The power management unit 108 includes a boost and voltage stabilization circuit, and the voltage provided by the power supply 110 is boosted and regulated by the power management unit 108 to maintain a stable voltage. The voltage boosted and regulated by the power management unit 108 is used to supply power or power to the control unit 102, the oscillating unit 106, and the monitoring unit 104. When the power source 110 is a battery, the voltage provided by the battery may be between, for example, 1.6 volts to 0.9 volts, or even 2.5 volts to 3 volts, especially after the indicator component is used for a period of time, the battery power consumption causes the voltage to gradually decrease, so The power management unit 108 maintains the power supply 110 to provide a stable voltage output of the indicator component, so that the signal transmission of the indicator component can be kept as stable as possible. The capacitors in the figure are used to store electrical energy. The control unit 102 is a circuit that controls when the oscillating unit 106 oscillates. The control unit 102 includes a microcontroller (Microcontroller Unit), a microprocessor (Microprocessor) or other control circuit, but is not limited to a microcontroller or a microprocessor. The monitoring unit 104 receives the sensing signal from the oscillating unit 106 and couples the trigger signal from the electromagnetic induction board. When a certain intensity is reached, the control unit 102 sends a trigger signal (Trigger Signal), and the control unit 102 must receive the trigger signal. After the time, the oscillating unit 106 is enabled to transmit electromagnetic waves of a certain frequency to the adjacent space for a fixed period of time. The monitoring unit 104 detects the trigger signal from the electromagnetic induction board through the oscillating unit 106, and converts it into a trigger signal for notification control. The unit 102 is configured, and the control unit 102 determines when the oscillating unit 106 oscillates to emit an electromagnetic wave signal. The oscillating unit 106 includes an oscillating circuit, and the oscillating circuit forms a resonant circuit with the inductor, and the resonant frequency thereof can be the same as the frequency of the trigger signal emitted by the electromagnetic induction board or a frequency doubling relationship, or a different frequency. In addition, the monitoring unit 104 for receiving and coupling the trigger signal from the electromagnetic induction board can be omitted, and the function is integrated into the control unit 102, that is, the control unit 102 receives and couples the trigger signal from the electromagnetic induction board. When a certain intensity is reached, the control unit 102 oscillates according to the setting control oscillation unit 106 to emit an electromagnetic wave signal to the electromagnetic induction board.

The indicator component shown in the first figure has a power supply, so it is matched with a corresponding electromagnetic induction board. The electromagnetic induction board usually comprises a control circuit, an electromagnetic antenna circuit substrate composed of a plurality of antennas or a sensor coil and a substrate which are arranged in parallel with each other in the X and Y directions, and a signal processing circuit including a signal amplifier circuit. ), phase detector and analog to digital converter. The electromagnetic induction board sends a trigger signal by a loop coil that sends a trigger control signal. When different indicator components are simultaneously present in the height that can be sensed in the working area, different indicator components receive the trigger signal from the electromagnetic induction board by using the trigger signal. The control unit 102 of each index component is differently set, so that the control unit 102 of the different index component controls the oscillating unit 106 to oscillate to emit electromagnetic wave signals at different times, so that all index components sequentially emit electromagnetic wave signals according to the settings, that is, different index components. The control unit 102 enables the time of each of the oscillating units 106 to be different. By distinguishing the electromagnetic wave signals emitted by the index components at different time points, the control circuit and the signal processing circuit of the electromagnetic sensor board can identify different index components, and thus Nearly simultaneously presenting coordinate points of multiple indicator components, This method can realize a system in which multiple indicator components operate simultaneously at a single frequency.

The second figure shows a timing diagram of transmitting electromagnetic wave signals at different time points after receiving the trigger signal by a plurality of index components according to an embodiment of the present invention. As shown in the second figure, after receiving the trigger signal from the electromagnetic induction board, for example, the indicator element shown in the first figure, the respective monitoring unit 104 of the first indicator element to the fourth indicator element receives the respective oscillation unit 106. The sensing signals are sent to the respective control unit 102. After the control unit 102 in the first indicator element to the fourth indicator element receives the trigger signal from the respective monitoring unit 104, the control unit 102 of the first indicator element is set differently by the control unit 102 of each indicator element. After the delay time, for example, 100 microseconds (μsec), the oscillating unit 106 that controls the first indicator element oscillates to emit an electromagnetic wave signal, and the electromagnetic wave signal is transmitted for a signal transmission time, for example, 300 microseconds. Then, the control unit 102 of the second indicator component controls the second, according to a preset time, after a second delay time, for example, the first delay time plus the signal transmission time of the first indicator component, that is, 100 microseconds plus 300 microseconds. The oscillating unit 106 of the indicator component oscillates to emit an electromagnetic wave signal, and the electromagnetic wave signal is also transmitted for a signal transmission time, such as 300 microseconds. In the same manner, the control unit 102 of the third indicator component is preset, after a third delay time, for example, the first delay time plus the signal transmission time of the first indicator component plus the signal transmission time of the second indicator component. That is, 100 microseconds plus 300 microseconds plus 300 microseconds, the oscillating unit 106 controlling the third indicator element oscillates to emit an electromagnetic wave signal, and the electromagnetic wave signal is also transmitted for a signal transmission time, for example, 300 microseconds. The control unit 102 of the fourth indicator component is configured to, after a fourth delay time, for example, the first delay time plus the signal transmission time of the first, second, and third indicator components, that is, 100 microseconds plus 300 micrometers. Seconds plus 300 microseconds plus 300 microseconds, the oscillating unit 106 controlling the fourth indicator element oscillates to emit electromagnetic waves, and electricity The magnetic wave signal is also transmitted for a duration of 300 microseconds. In fact, in order to avoid interference of signals between different indicator elements, in fact, the end time point of the first indicator element signal transmission time and the start time point of the second indicator element transmission time may have a time interval. Similarly, the end time point of the second indicator component signal transmission time and the start time point of the third indicator component transmission time also have a time interval, and the end time point of the third indicator component signal transmission time and the fourth indicator component emission time The starting time point also has a time interval. The signal transmission sequence, the first delay time, the signal transmission time, and even the time interval of signal transmission of the above indicator elements can be written by the firmware of the control unit 102. The trigger signal of the electromagnetic induction board is a signal of a certain frequency, and is transmitted by the electromagnetic induction board to the adjacent space for a certain period of time. If the indicator component is close to the electromagnetic induction board and maintained for a certain period of time, the indicator component can sense the trigger signal of the board end. . The trigger signal in the second figure is the trigger signal inside the indicator component.

The third figure shows a functional block diagram of an indicator element of one embodiment of the present invention. The indicator component contains a batteryless electromagnetic pen. Referring to the third figure, the indicator component includes a control unit 302, a monitoring unit 304, and a Resonance Unit 306. Unlike the indicator components shown in the first figure, the indicator elements in the third figure do not have a power management unit and a power supply. The power supply of the indicator component of the third figure is derived from the electromagnetic wave energy emitted by the corresponding electromagnetic induction plate, and is accumulated and stored to a sufficient electrical energy after a resonant energy storage time, and supplies and drives the electric energy of the control unit 302, the resonance unit 306 and the monitoring unit 304. Or a power source, and the control unit 302 controls the emission of electromagnetic wave signals. The capacitors in the figure are used to store electrical energy. The control unit 302 is a circuit for controlling when the resonance unit 306 oscillates. The control unit 302 includes a microcontroller, a microprocessor or other control circuit, but is not limited to a microcontroller or a microprocessor. Device. The resonant unit 306 is coupled to the resonant electromagnetic wave signal from the electromagnetic induction board. The monitoring unit 304 receives the sensing signal of the resonant unit 306. When the intensity reaches a certain intensity, the monitoring unit 304 sends a trigger signal to the control unit 302. After receiving the trigger signal, the control unit 302 receives the trigger signal. After a certain period of time, the resonant unit 306 is enabled to transmit electromagnetic waves of a certain frequency to the adjacent space for a fixed period of time. The monitoring unit 304 detects the trigger signal from the electromagnetic induction board through the resonance unit 306, and converts it into a trigger signal for notifying the control unit 302, and the control unit 302 determines when the resonance unit 306 oscillates and emits an electromagnetic wave signal. . The resonance unit 306 includes a resonance energy storage circuit, and the resonance energy storage circuit forms a resonance circuit with the inductor, and the resonance frequency thereof can be the same as the frequency of the trigger signal emitted by the electromagnetic induction board or a frequency multiplication relationship, or a different frequency. . In addition, the monitoring unit 304 for receiving and coupling the trigger signal from the electromagnetic induction board can be omitted, and the function is integrated into the control unit 302, that is, the control unit 302 monitors the resonance unit 306 to receive the resonance from the electromagnetic induction board. After the signal reaches a certain intensity, the control unit 302 oscillates according to the setting control resonance unit 306 to emit an electromagnetic wave signal to the electromagnetic induction board.

The indicator component shown in the third figure does not have a power supply, so it is matched with the corresponding electromagnetic induction board. The electromagnetic induction board usually includes a control circuit, an electromagnetic antenna circuit substrate and a signal processing circuit including a plurality of induction coils and a substrate which are arranged in parallel with each other in the X and Y directions, and a signal processing circuit including a signal amplifying circuit, a phase detecting circuit and an analog digital converting circuit. The antenna or the induction coil on the electromagnetic antenna circuit substrate is connected to the switch, and the control circuit controls the switch to switch the antenna or the induction coil to transmit or receive the electromagnetic signal. The electromagnetic signal emitted by the induction coil causes resonance of the resonant circuit of the resonance unit 306 in the index component. When the high frequency electromagnetic signal emitted by the antenna or the induction coil is temporarily interrupted, the resonant circuit in the electromagnetic pen or the index component is controlled by the control unit 302 to emit an electromagnetic signal after a delay time, and is connected by the induction coil. Received, and the signal processing analysis is performed by the control circuit and the signal processing circuit.

The electromagnetic induction board corresponding to the non-power indicator component transmits the resonant electromagnetic wave signal by the induction coil. When different indicator components are simultaneously present in the height that can be sensed in the working area, the different indicator components receive the resonance signal from the electromagnetic induction board. Maintain a period of time for energy storage. After the energy storage is completed, the control unit 302 of each indicator component is differently set, so that the control unit 302 of the different index component controls the resonance unit 306 to oscillate to emit the electromagnetic wave signal at different times, so that all the indicator components are sequentially issued according to the setting. The electromagnetic wave signals, that is, the control unit 302 of different index components enable the time of the respective resonance units 306. By distinguishing the electromagnetic wave signals emitted by the index components at different time points, the control circuit and the signal processing circuit of the electromagnetic induction board end can be identified. Different index components can further display the coordinate points of multiple index components at the same time. In this way, a system with multiple index components operating simultaneously can be realized at a single frequency.

The fourth figure shows a timing diagram of the electromagnetic wave signals emitted by different index components at different time points after receiving the trigger signal by another index component according to another embodiment of the present invention. As shown in the fourth figure, after receiving the electromagnetic wave signal from the electromagnetic induction plate, for example, the index component shown in the third figure, the respective resonance units 306 of the first to fourth index elements start to resonate and perform Energy storage. The period of energy storage may include, for example, 20 to 30 cycles, and the frequency is 375 Hz, but is not limited thereto. When the energy storage is completed, it can be regarded as one of the trigger signals of the electromagnetic induction board, which is equivalent to the trigger component shown in the first figure and the second figure receiving the trigger signal from the electromagnetic induction board, that is, the trigger signal is terminated at the resonance energy storage time. Issued afterwards. After the energy storage is completed, the monitoring unit 304 sends a trigger signal (a trigger signal of the non-electromagnetic induction board) in the indicator component to the respective control unit 302 according to the sensing signal strength and the energy storage result of the respective resonance unit 306. When After the control unit 302 of the first indicator element to the fourth indicator element receives the trigger signal from the respective monitoring unit 304, the control unit 302 of the first indicator element is differently set by the control unit 302 of each indicator element, and the control unit 302 of the first indicator element undergoes a first delay. After the time, for example, 150 microseconds, the resonance unit 306 controlling the first index element oscillates to emit an electromagnetic wave signal, and the electromagnetic wave signal is transmitted for a signal emission time, for example, 450 microseconds. Then, the control unit 302 of the second indicator component controls the second, according to a preset time, after a second delay time, for example, the first delay time plus the signal transmission time of the first indicator component, that is, 150 microseconds plus 450 microseconds. The resonance unit 306 of the indicator element oscillates to emit an electromagnetic wave signal, and the electromagnetic wave signal is also transmitted for a signal transmission time, such as 450 microseconds. In the same manner, the control unit 302 of the third indicator component is preset, after a third delay time, for example, the first delay time plus the signal transmission time of the first indicator component plus the signal transmission time of the second indicator component. That is, 150 microseconds plus 450 microseconds plus 450 microseconds, the resonance unit 306 controlling the third indicator element oscillates to emit an electromagnetic wave signal, and the electromagnetic wave signal is also transmitted for a signal transmission time, for example, 450 microseconds. The control unit 302 of the fourth indicator component is configured to, after a fourth delay time, for example, the first delay time plus the signal transmission time of the first, second, and third indicator components, that is, 150 microseconds plus 450 micrometers. The second plus 450 microseconds plus 450 microseconds, the resonant unit 306 controlling the fourth index component oscillates to emit an electromagnetic wave signal, and the electromagnetic wave signal is also transmitted for a signal transmission time of 450 microseconds. In fact, in order to avoid interference of signals between different indicator elements, in fact, the end time point of the first indicator element signal transmission time and the start time point of the second indicator element transmission time may have a time interval. Similarly, the end time point of the second indicator component signal transmission time and the start time point of the third indicator component transmission time also have a time interval, and the end time point of the third indicator component signal transmission time and the fourth indicator component emission time The starting time point also has a time interval. Above The signal transmission sequence of the target component, the first delay time, the signal transmission time, and even the time interval of the signal transmission can be written by the firmware of the control unit 302. The resonant electromagnetic wave signal at the end of the electromagnetic induction plate is a signal of a certain frequency, and is transmitted by the electromagnetic induction plate to the adjacent space for a certain period of time. If the index component is close to the electromagnetic induction plate and maintained for a certain period of time, the indicator component can sense the end of the electromagnetic induction plate. The resonant electromagnetic wave signal is used for energy storage, and the control unit 302 transmits a signal to the electromagnetic induction board after a delay according to the setting.

The fifth figure shows a timing diagram of the electromagnetic wave signals emitted by different index components at different time points after receiving the trigger signals according to an embodiment of the present invention. The timing chart shown in the fifth figure is applicable to the index elements in the embodiments shown in the first and third figures. As shown in the fifth figure, in each of the indicator elements, the monitoring unit continuously sends out the trigger signal between the secondary trigger signals in the time interval, and each indicator element sequentially sends out electromagnetic wave signals twice. The time interval of the trigger signal can be adjusted according to actual needs. During the time interval of the trigger signal, the number of times the electromagnetic wave signal is emitted by each indicator component can also be adjusted. In addition, in the above embodiment, although four index elements are taken as an example, the number of index elements that can be supported by the coordinate positioning system implemented by the principle of the present invention is not limited. The number of times that each indicator component transmits a signal during the time interval of the trigger signal can be adjusted according to actual needs. The time interval of the trigger signal can be adjusted according to the number of indicator components to be supported and the number of times each indicator component transmits a signal. Of course, the length of the transmission signal of each indicator component can also be adjusted according to actual needs. The number of supported indicator components can be expanded by writing the firmware of the control unit. Other equivalent changes or modifications may be made without departing from the spirit and scope of the invention.

The indicator component of the invention uses the trigger signal to trigger the control unit, so that different indicator components sequentially delay the transmission of the signal, and the electromagnetic induction board is in each time interval. In the compartment, each indicator component transmits signals in sequence, and the electromagnetic induction board recognizes each indicator component according to the setting and performs operations to determine the coordinates of each indicator component, so that the coordinates of the multi-index component can be obtained under the existing hardware architecture. Information, complete the coordinate positioning system supporting multiple indicator components.

The above-mentioned embodiments are merely illustrative of the technical idea and the features of the present invention, and the objects of the present invention can be understood by those skilled in the art and can be implemented according to the scope of the invention, that is, other Various equivalent changes or modifications may be made without departing from the spirit and scope of the invention, and are intended to be included within the scope of the invention.

102‧‧‧Control unit

106‧‧‧Oscillation unit

104‧‧‧Monitoring unit

108‧‧‧Power Management Unit

110‧‧‧Power supply

Claims (10)

An index component applied to a coordinate positioning system supporting a multi-index component, the index component comprising: an oscillating unit, wherein the oscillating unit detects an electromagnetic sensor board trigger signal from an electromagnetic induction board of the coordinate positioning system; a monitoring unit that generates a trigger signal according to one of the sensing signals of the oscillating unit; a control unit that receives the trigger signal, controls the oscillating unit to emit an electromagnetic signal and maintains a predetermined time after a predetermined delay time a signal transmission time; and a power source that supplies voltage and power of the control unit, the oscillating unit, and the monitoring unit. The indicator component of claim 1 further includes a power management unit, wherein the power management unit includes a boosting and voltage stabilizing circuit to boost and stabilize the voltage provided by the power supply to maintain a stable voltage. . The indicator component of claim 1, wherein the control unit comprises one of a microcontroller, a microprocessor and a control circuit. The indicator component of claim 1, wherein the power source comprises a battery. The indicator component of claim 1, wherein the control unit controls the oscillating unit to transmit the first electromagnetic signal a plurality of times between the trigger signals. The indicator component of claim 1, wherein the predetermined delay time and the predetermined signal transmission time are set by writing a firmware of the control unit. An index component applied to a coordinate positioning system supporting a multi-index component, the index component comprising: a resonance unit that resonates with an electromagnetic wave signal emitted from an electromagnetic induction plate and is subjected to a resonant energy storage time The electromagnetic wave signal is stored as an electric energy; a monitoring unit that generates a trigger signal according to one of the sensing signals of the resonant unit; and a control unit that receives the trigger signal and controls the first predetermined delay time The resonant unit emits a first electromagnetic signal and maintains a predetermined signal transmission time, wherein the electrical energy supplies and drives the control unit, the resonant unit and the monitoring unit. The indicator component of claim 7, wherein the trigger signal is issued after the resonance energy storage time ends. The indicator component of claim 7, wherein the control unit controls the oscillating unit to transmit the first electromagnetic signal a plurality of times between the trigger signals. The indicator component of claim 7, wherein the resonant energy storage time, the first predetermined delay time, and the predetermined signal transmission time are set by programming a firmware of the control unit.