Abstract: An air particle detecting device includes a main body, a processor received in the main body, and an air particle counter received in the main body. The air particle counter is electrically coupled to the processor. The air particle counter is configured to calculate data related to a quantity of particulate matter and transmit the data to the processor. The processor is configured to calculate a concentration of PM 2.5 according to the data.

Abstract: A mobile device with display screen of more than one size includes a first portion and a second portion. The first portion includes a main screen and a first gyroscope sensor. The main screen is located on a front surface of the first portion. The second portion includes an auxiliary screen and a second gyroscope sensor. The auxiliary screen is located on a front surface of the second portion. The first and second portions are pivotally connected to each other and can be folded or unfolded. The first and second gyroscope sensors can determine the folded and unfolded states of the first and second portions so as to switch the mobile device into a single screen mode of the main screen or a dual screen mode of the main and auxiliary screens.

Abstract: A stylus and holder assembly to facilitate recharging includes a stylus and a holder. The stylus includes a body, a clip, a power supply, a first contact, and a second contact. The clip is mounted on the body. The power supply is mounted in the body. The first contact and the second contact are provided on the clip and are electrically connected to the power supply. The first contact and the second contact can recharge the power supply. The holder includes a holding portion for holding the stylus. The power supply of the stylus can be recharged when required, when in place in the holder.

Abstract: A stylus and holder assembly to facilitate recharging includes a stylus and a holder. The holder includes a connecting portion, a holding portion, a charging port, and a charging circuit. The holding portion is attached to the connecting portion for holding the stylus. The charging port is disposed in the holding portion. The charging circuit is disposed in the connecting portion, and is electrically connected to the charging port. The stylus can be recharged by the charging circuit through the charging port when required, when in place in the holding portion of the holder.

Abstract: A touch panel device having high touch sensitivity includes sensing capacitors, switches, storage capacitors, a differential amplifier and a signal processing unit. During a sense period, the switches are periodically turned on alternately for periodically transferring the charges of the sensing capacitors to the storage capacitors. The differential amplifier is put in use for amplifying the voltage difference of two corresponding storage capacitors for generating a touch readout signal. The signal processing unit performs an OR operation on two touch readout signals generated during different sense periods based on different sensing capacitor combinations regarding same panel touch position for providing a touch position signal.

Abstract: A touch panel device having high touch sensitivity includes sensing capacitors, switches, storage capacitors, a differential amplifier and a signal processing unit. During a sense period, the switches are periodically turned on alternately for periodically transferring the charges of the sensing capacitors to the storage capacitors. The differential amplifier is put in use for amplifying the voltage difference of two corresponding storage capacitors for generating a touch readout signal. The signal processing unit performs an OR operation on two touch readout signals generated during different sense periods based on different sensing capacitor combinations regarding same panel touch position for providing a touch position signal.