Abstract: A pen includes: an electrode; a power supply circuit which, in operation, supplies a first voltage; a low voltage integrated circuit (LVIC) coupled to the power supply circuit, wherein the LVIC, in operation, outputs a transmission signal at the first voltage; a high voltage integrated circuit (HVIC) including a level shifter which, in operation, outputs the transmission signal at a second voltage that is higher than the first voltage; an inter-IC wire which, in operation, supplies the transmission signal having the first voltage from the LVIC to the HVIC; an electrode wire which, in operation, supplies the transmission signal having the second voltage from the HVIC to the electrode; and a step-up circuit coupled to the power supply circuit, wherein the HVIC in operation, supplies the second voltage to the level shifter.

Abstract: Active pen includes first and second electrodes provided at different positions, a transmission circuit that uses a booster circuit to cause a change in the first electrode to thereby transmit a downlink signal, a reception circuit that uses the second electrode to detect an uplink signal, and a stop filter that prevents a change in a potential of the first electrode from affecting a potential of the uplink signal detected by the reception circuit.

Abstract: [Object] To allow a pen to properly receive an uplink signal even if there is dullness in a waveform of the uplink signal. [Solution] Provided is an invention of a method of transmitting transmission data from a sensor controller 31 that detects a pen 2 to a pen through a sensor electrode group 30. The pen 2 includes a pen tip electrode arranged near a pen tip, an analog circuit that detects edges of a signal led to the pen tip electrode, and a digital circuit that performs a correlation operation of an output signal of the analog circuit and known patterns to detect transmission data. The sensor controller 31 generates a pulse signal representing the transmission data and transmits the pulse signal, by using a main signal and a sub signal of the pulse signal so as to enhance the edges, thereby transmitting the transmission data through the sensor electrode group.

Abstract: A pen includes: an electrode; a power supply circuit which, in operation, supplies a first voltage; a low voltage integrated circuit (LVIC) coupled to the power supply circuit, wherein the LVIC, in operation, outputs a transmission signal at the first voltage; a high voltage integrated circuit (HVIC) including a level shifter which, in operation, outputs the transmission signal at a second voltage that is higher than the first voltage; an inter-IC wire which, in operation, supplies the transmission signal having the first voltage from the LVIC to the HVIC; an electrode wire which, in operation, supplies the transmission signal having the second voltage from the HVIC to the electrode; and a step-up circuit coupled to the power supply circuit, wherein the HVIC in operation, supplies the second voltage to the level shifter.

Abstract: The invention provides a method for producing an epoxy compound by hydrogen peroxide using an organic compound having a carbon-carbon double bond as a raw material, wherein a by-product is suppressed from being generated and the epoxy compound is produced in a high yield. In particular, the invention provides a method for producing an epoxy compound involving oxidizing a carbon-carbon double bond in an organic compound with hydrogen peroxide in the presence of a catalyst, wherein the catalyst comprises a tungsten compound; a phosphoric acid, a phosphonic acid or salts thereof; and an onium salt having an alkyl sulfate ion represented by formula (I) as an anion: wherein R1 is a linear or branched aliphatic hydrocarbon group having 1 to 18 carbons, which may be substituted with 1 to 3 phenyl groups.

Abstract: A method in which a sensor controller is connected to a sensor having an electrode group provided together with a display panel configured to operate in during a variable refresh cycle among a plurality of refresh cycles, and an active stylus performs bidirectional communication with the sensor controller. According to the method, the sensor controller acquires a present refresh cycle among the plurality of refresh cycles of the display panel, generates an uplink signal, which serves as a reference for synchronization corresponding to the acquired present refresh cycle, and transmits the uplink signal to the active stylus, which is not detected as yet or is detected already, at the present refresh cycle.

Abstract: A method in which a sensor controller is connected to a sensor having an electrode group provided together with a display panel configured to operate in during a variable refresh cycle among a plurality of refresh cycles, and an active stylus performs bidirectional communication with the sensor controller. According to the method, the sensor controller acquires a present refresh cycle among the plurality of refresh cycles of the display panel, generates an uplink signal, which serves as a reference for synchronization corresponding to the acquired present refresh cycle, and transmits the uplink signal to the active stylus, which is not detected as yet or is detected already, at the present refresh cycle.

Abstract: A low-power-consumption, noise-immune analog circuit for a position indicator is provided. The analog circuit provided by the present disclosure is connected to an electrode that receives a control signal by capacitive coupling, and includes an edge detection circuit and a waveform restoration circuit. The edge detection circuit detects rising and falling edges of the control signal received by the electrode. The waveform restoration circuit restores the waveform of the control signal in accordance with the rising and falling edges detected by the edge detection circuit.

Abstract: A pen includes: an electrode; a power supply circuit which, in operation, supplies a first voltage; a low voltage integrated circuit (LVIC) coupled to the power supply circuit, wherein the LVIC, in operation, outputs a transmission signal at the first voltage; a high voltage integrated circuit (HVIC) including a level shifter which, in operation, outputs the transmission signal at a second voltage that is higher than the first voltage; an inter-IC wire which, in operation, supplies the transmission signal having the first voltage from the LVIC to the HVIC; an electrode wire which, in operation, supplies the transmission signal having the second voltage from the HVIC to the electrode; and a step-up circuit coupled to the power supply circuit, wherein the HVIC in operation, supplies the second voltage to the level shifter.

Abstract: A low-power-consumption, noise-immune analog circuit for a position indicator is provided. The analog circuit provided by the present disclosure is connected to an electrode that receives a control signal by capacitive coupling, and includes an edge detection circuit and a waveform restoration circuit. The edge detection circuit detects rising and falling edges of the control signal received by the electrode. The waveform restoration circuit restores the waveform of the control signal in accordance with the rising and falling edges detected by the edge detection circuit.

Abstract: A low-power-consumption, noise-immune analog circuit for a position indicator is provided. The analog circuit provided by the present disclosure is connected to an electrode that receives a control signal by capacitive coupling, and includes an edge detection circuit and a waveform restoration circuit. The edge detection circuit detects rising and falling edges of the control signal received by the electrode. The waveform restoration circuit restores the waveform of the control signal in accordance with the rising and falling edges detected by the edge detection circuit.

Abstract: A method in which a sensor controller is connected to a sensor having an electrode group provided together with a display panel configured to operate in during a variable refresh cycle among a plurality of refresh cycles, and an active stylus performs bidirectional communication with the sensor controller. According to the method, the sensor controller acquires a present refresh cycle among the plurality of refresh cycles of the display panel, generates an uplink signal, which serves as a reference for synchronization corresponding to the acquired present refresh cycle, and transmits the uplink signal to the active stylus, which is not detected as yet or is detected already, at the present refresh cycle.

Abstract: A method in which a sensor controller is connected to a sensor having an electrode group provided together with a display panel configured to operate in during a variable refresh cycle among a plurality of refresh cycles, and an active stylus performs bidirectional communication with the sensor controller. According to the method, the sensor controller acquires a present refresh cycle among the plurality of refresh cycles of the display panel, generates an uplink signal, which serves as a reference for synchronization corresponding to the acquired present refresh cycle, and transmits the uplink signal to the active stylus, which is not detected as yet or is detected already, at the present refresh cycle.

Abstract: A low-power-consumption, noise-immune analog circuit for a position indicator is provided. The analog circuit provided by the present disclosure is connected to an electrode that receives a control signal by capacitive coupling, and includes an edge detection circuit and a waveform restoration circuit. The edge detection circuit detects rising and falling edges of the control signal received by the electrode. The waveform restoration circuit restores the waveform of the control signal in accordance with the rising and falling edges detected by the edge detection circuit.

Abstract: A method in which a sensor controller is connected to a sensor having an electrode group provided together with a display panel configured to operate in during a variable refresh cycle among a plurality of refresh cycles, and an active stylus performs bidirectional communication with the sensor controller. According to the method, the sensor controller acquires a present refresh cycle among the plurality of refresh cycles of the display panel, generates an uplink signal, which serves as a reference for synchronization corresponding to the acquired present refresh cycle, and transmits the uplink signal to the active stylus, which is not detected as yet or is detected already, at the present refresh cycle.

Abstract: A total time necessary for work is shortened by reducing program correcting.

Abstract: Method for producing carboxylic anhydride, the method includes heating raw material compound represented by the following general formula (1): [in the formula (1), R1 is tetravalent organic group having at least two carbon atoms adjacent to each other, and groups represented by the formulae: —COOR2 and —COOR3 are bonded to one and the other of the two adjacent carbon atoms, respectively, R2 and R3 each represent hydrogen atom or the like, X represents hydrogen atom or the like, and Y represents hydrogen atom or the like] in carboxylic acid having 1 to 5 carbon atoms with catalyst being used, to thereby obtain the carboxylic anhydride, wherein the catalyst is homogeneous acid catalyst having acid dissociation constant (pKa) of ?6.5 or lower and boiling point of 100° C. or higher, the acid dissociation constant (pKa) being determined by quantum chemistry calculation based on density functional method.

Abstract: A method for producing a 5-norbornene-2-spiro-?-cycloalkanone-??-spiro-2?-5?-norbornene, comprising: a first step of forming a specific Mannich base by reacting a specific carbonyl compound and a specific amine compound with each other in an acidic solvent comprising a formaldehyde derivative and an acid represented by a formula: HX (in the formula, X represents F or the like), to thereby obtain a reaction liquid comprising the Mannich base in the acidic solvent; and a second step of reacting the Mannich base and a specific diene compound with each other by adding an organic solvent, a base in an amount of 1.0 to 20.0 mole equivalents to the acid, and the diene compound to the reaction liquid, and then heating the reaction liquid, to thereby form a specific 5-norbornene-2-spiro-?-cycloalkanone-??-spiro-2?-5?-norbornene, wherein a content of the acid in the acidic solvent used in the first step is 0.01 to 0.075 mole equivalents to the ketone group of the carbonyl compound.

Abstract: A total time necessary for work is shortened by reducing program correcting.