Pixart Imaging Incorporated

Sung-Han Wu

Yi-Hsien Ko

Ming-Hung Tsai

Hsin-Chia Chen

Yu-Han Chen

Che-Chia Hsu

Meng-Lin Yu

Keen-Hun Leong

Wooi Kip Lim

Chia-Yi Lee

Kei Tee Tiew

Chang-Yuan Liou

Ming-hung Tsai

There is provided a capacitive touch control system including a readout circuit and a touch panel. The touch panel includes multiple pixels arranged in a matrix, and is configured to operate in a first mode or a second mode. In the first mode, the touch panel time-divisionally detects a beacon frequency of a beacon symbol of the stylus pen signal within a first detection interval and performs a touch detection within a second detection interval corresponding to a beacon length interval of the beacon symbol. In the second mode, the readout circuit sequentially reads all pixel rows and pixel columns of the multiple pixels using a predetermined number of readout intervals within a positioning interval of the stylus pen signal, wherein in each of the readout intervals, each of multiple sub-circuits of the readout circuit reads one pixel row or one pixel column of the touch panel.

Capacitive touch control system detecting stylus pen and finger

There is provided a capacitive touch control system adapted to detect low frequency signals, including a touch panel and an analog front end. The analog front end includes a frequency booster, which boosts a low frequency signal outputted by the touch panel using a variable reference frequency corresponding to different function symbols of the low frequency signal such that resistance of a resistor of an amplifier in the analog front end needs not to be increased thereby reducing the manufacturing cost and a leakage voltage drop on the resistor.

Capacitive touch control system with frequency booster

There is provided a smart control system including a host, at least one sensor and an informing device. The host identifies the activity of a specific member according to the detection result of the at least one sensor, and informs the specific member to take medicine on time or avoid eating specific ingredients using the informing device.

Smart control system

There is provided a detection chip including a charging circuit, a discharging circuit, a counter and a processor. The charging circuit provides a first charging current within a first charging interval, and provides a second charging current, smaller than the first charging current, within a second charging interval. The discharging circuit provides a first discharging current within a first discharging interval, and provides a second discharging current, smaller than the first discharging current, within a second discharging interval. The counter counts the second charging interval and the second discharging interval. The processor identifies a touch event according to the second charging interval and the second discharging interval.

Detection chip capable of cancelling baseline voltage

There is provided a capacitive touch control system adapted to detect low frequency signals, including a touch panel and an analog front end. The analog front end includes a frequency booster, which boosts a low frequency signal outputted by the touch panel using a variable reference frequency corresponding different function symbols of the low frequency signal such that resistance of a resistor of an amplifier in the analog front end needs not to be increased thereby reducing the manufacturing cost and a leakage voltage drop on the resistor.

There is provided a touch detection circuit including a charging circuit, a discharging circuit, a counter and a processor. The charging circuit charges a detection capacitor within a charging interval using different currents. The discharging circuit discharges the detection capacitor within a discharging interval using different currents. The counter counts the charging interval and the discharging interval. The processor subtracts a baseline time from a counted charging time and a counted discharging time to cancel the noise interference.

Touch detection circuit with different charging and discharging currents and operating method thereof

There is provided a capacitive touch device including a touch panel and a control chip. The touch panel includes a detection electrode configured to form a self-capacitor. The control chip includes an emulation circuit and a subtraction circuit. The emulation circuit is configured to output a reference signal. The subtraction circuit is coupled to the emulation circuit and the detection electrode, subtracts the reference signal outputted by the emulation circuit from a detected signal outputted by the detection electrode to output a differential detected signal, and identifies a touch event according to an amplified differential detected signal so as to improve the touch sensitivity.

Control chip for touch panel with high sensitivity

There is provided a capacitive touch device including a touch panel and a control chip. The touch panel includes detection electrodes configured to form self-capacitance and mutual-capacitance. The control chip includes an emulation circuit and a subtraction circuit. The emulation circuit is configured to output a reference signal. The subtraction circuit is coupled to the emulation circuit and the detection electrode, subtracts the reference signal outputted by the emulation circuit from a detected signal outputted by the detection electrodes to output a differential detected signal, and identifies a touch event according to the differential detected signal to reduce the power consumption for touch detection.

Capacitive touch device with high sensitivity and low power consumption

A touch controlling apparatus to be coupled to a touch sensor array is disclosed. The apparatus comprises a memory circuit and a controlling circuit. The memory circuit is used for recording different calibration ratios associated with different process variations. The controlling circuit is coupled to the memory circuit, and is used for calibrating or adjusting sensitivities of a plurality of cells by respectively using the different calibration ratios to calibrate or adjust sensed capacitance changes of the plurality of cells to generate and output resultant capacitance changes of the plurality of cells.

Touch controlling mechanism capable of calibrating variations of sensor cells of touch sensor array

A direction control apparatus with a sensor, a method for determining a driver status using the driving control apparatus, and a system for determining the driver status are provided. The direction control apparatus includes at least a pressure sensor to sense a plurality of pressure values applied to multiple positions of the direction control apparatus. When the pressure values are received by a controller of the apparatus, the driver status can be determined according to a change of pressure values over time, or further a change of the positions where pressure is applied. The system can connect with an autopilot system and an alarm system of a vehicle via the controller. Therefore, the system incorporates an autopilot system and issues an alarm when the driver status is determined to be abnormal.

Direction control apparatus with sensor, and method and system for determining driver status using the same

There is provided a smart home control system including a host, at least one sensor, a plurality of controlled devices and an informing device. The host identifies entering and leaving of family members according to detection results of the at least one sensor, and controls on/off of the controlled devices or informs a specific family member by the informing device to execute agenda according to a member ID of a family member who is identified to enter or leave the house. When identifying that one agendum is unable or forgotten to be executed by the specific family member, the host further rearranges the agendum.

Smart home control system

There is provided a smart home control system including a host, at least one sensor, a plurality of controlled devices and an informing device. The host identifies entering and leaving of family members according to detection results of the at least one sensor, and controls on/off of the controlled devices or informs a specific family member by the informing device to execute agenda according to a member ID of a family member who is identified to enter or leave the house.

Growing community of inventors

Hsin-Chu County, Taiwan

Sung-Han Wu