Abstract:
본 발명에서 제안하고 있는 터치스크린 패널을 이용한 커패시터 캘리브레이션 방법에 따르면, 커패시터 변화를 측정하는 터치스크린 패널에서 부가회로 없이도 캘리브레이션 진행시에 필요한 입력되는 신호(TX 파형)와 보정신호(TX 반대 파형)만을 터치스크린 패널에 입력하여 캘리브레이션을 진행할 수 있도록 함으로써, 전류 구동회로 및 커패시터를 내장하는 부가회로를 필수로 구비하는 기존에 비해 제품 면적이 줄어들게 되므로 제품의 면적 감소 효과가 크고, 또한 터치스크린 패널의 변화에 큰 영향을 받지 않아 광범위한 터치스크린 패널에서 적용이 가능하다.
Abstract:
본 발명에서 제안하고 있는 터치 정확도 향상을 위한 정전용량 측정 장치에 따르면, 비교부를 포함하여 정전용량 측정부에서 측정된 정전용량과 미리 정해진 제1 기준 값 또는 제2 기준 값을 비교하여 측정된 정전용량이 기준 값에 대해 미리 정해진 조건을 만족할 경우에 유효한 터치 신호로 판단함으로써, 효율적인 터치 유무 판단을 할 수 있고 노이즈에 의해 정전용량이 변화하더라도 실질적인 터치가 일어나지 않은 것으로 판단할 수 있어 정확성이 높다.
Abstract:
본 발명은 부하 구동신호 연동형 고전압 구동방법에 관한 것으로서, 입력 전원을 승압하여 미리 설정된 크기의 출력 전원 전압을 생성하는 단계, 상기 생성된 출력 전원 전압이 부하 구동회로의 출력 신호에 연동하도록 상기 출력 전원전압을 변환하는 단계 및 상기 변환된 출력 전원전압을 상기 부하 구동회로에 인가하여 부하를 구동하는 단계를 포함하는 것을 특징으로 한다. 상기와 같은 본 발명에 따르면, 배터리의 전압 또는 저전압 정류 전원을 고전압으로 변환하여 부하를 구동하는 휴대형 전자기기에서 배터리의 전력 소비를 최소화하는 것이 가능하여 햅틱 단말기 등과 같이 고전압의 사용이 요구되는 기기 또는 기능의 사용이 보다 활성화될 수 있는 효과가 있다.
Abstract:
PURPOSE: A high voltage amplifier circuit for minimizing an area is provided to reduce parasitic capacitance by designing a low voltage part within a high voltage amplifier circuit. CONSTITUTION: A low voltage part receives a voltage from an inverting input terminal(T1) and a non-inverting input terminal(T2). A high voltage part outputs an amplified voltage through an output terminal(T3) by amplifying the voltage inputted into the low voltage part. A voltage isolating part is connected between the low voltage part and the high voltage part. The voltage isolating part isolates the voltage of the low voltage part and the voltage of the high voltage part. The low voltage part includes a first transistor(P21) which is connected to a bias current source(C2) and the inverting input terminal and a second transistor(P22) which is connected to the bias current source and a non-inverting input terminal.
Abstract:
PURPOSE: An apparatus for controlling an LED having high efficiency is provided to maximize the property efficiency of an LED by correcting characteristic change according to a voltage and temperatures when the LED is manufactured and operated. CONSTITUTION: A reference current generator(120) generates a reference current which is proportional to absolute temperature. A current generator(160) applies a current to an LED array by receiving the current generated from reference current generator. A sensor(140) measures a variable current which is outputted from the LED array. A controller(130) controls a DC-CD(110) converter and the current generator by determining the measured current fro the sensor. The DC/DC converter applies a voltage to the LED array by receiving a control signal transmitted from the controller wile being connected to an input power supply. A reference voltage generator generates the reference voltage of an alternating current and a direct current and supplies the reference voltage to the DC/DC converter and the current generator.
Abstract:
PURPOSE: A capacitance measurement apparatus for touch accuracy improvement is provided to determine an effective touch process, thereby neglecting a touch process by capacitance variations due to noise. CONSTITUTION: A capacitance measurement apparatus for touch accuracy improvement includes a capacitance measurement part(100), a comparison part(200), an AD convertor part(400), and a control part(300). The capacitance measurement part measures varied capacitance. The comparison part compares a first reference value and second reference value with the capacitance measured in the capacitance measurement part. The comparison part is placed between the capacitance measurement part and control part. The comparison part is comprised of a first comparator and second comparator. The first comparator compares the first reference value with the measured capacitance. The second comparator compares the second reference value with the measure capacitance. The control part determines an effective touch signal when the measured capacitance is bigger than the first reference value and smaller than the second reference value.
Abstract:
PURPOSE: An analog to digital conversion system and a method for reducing noise in a touch sensor by integrating an analog signal are provided to measure time reaching a reference value by integrating a sample and a held signal. CONSTITUTION: A CDS(Correlated Double Sampling) circuit(110) extracts a signal factor generated by deducting a premeasured reference value from an analog wave signal received from an input terminal connected to a touch panel(200). A sampling circuit(120) changes an analog signal factor inputted from the CDS circuit into a signal of a step waveform. An integrator(130) integrates the signal of the step waveform for a predetermined time period. An output circuit(140) outputs a binary code according to sensing time by comparing a preset first reference value with an integrated value. The output circuit reduces noise from a touch sensor by integrating the analog signal.
Abstract:
PURPOSE: A capacitor calibration method using a touch screen panel is provided to reduce product area by processing calibration without an additional circuit. CONSTITUTION: A calibration signal is inputted to a channel within a specific axis of a touch screen panel(S100). The signal is a square wave(S200). A compensation signal of an inverse square wave is inputted to the other channel.
Abstract:
PURPOSE: A method and a circuit for generating a high voltage are provided to minimize power consumption by generating an output power voltage interlocked with the size of a load driving signal when the high voltage is generated. CONSTITUTION: A high voltage transform unit(10) boosts input power to an output power voltage with a preset size. A sensor(20) senses the output voltage of the high voltage transform unit. A comparison unit(30) compares a power control signal with the voltage sensed by the sensor. A driving controller interlocks the output power voltage of the high voltage transform unit with the output signal of the driving circuit by controlling the operation of the high voltage transform unit according to the output signal of the comparison unit. A power control signal is identical to or correlated to the input signal of the load driving circuit.