Abstract: A method for controlling a touch device to power on or power off has steps of receiving direction information of the touch device; determining if the touch device is oriented to a direction that is outside or inside a preset viewing angle according to the direction information; detecting a gesture present on the touch device; and performing a power-saving function or a power-on function when detecting the gesture present on the touch device and determining that the direction of the touch device is outside or inside the preset viewing angle. The foregoing technique can replace the power-saving function and the power-on function activated by pressing a physical power button. Accordingly, operational frequency and failure rate of the physical power button can be reduced and an intuitive method for powering on or off the touch device with easy operation can thus be provided.

Abstract: A wireless door lock system with an emergency reporting function includes a user device, a door lock device, a network server and at least one recipient device. When the user device transmits a request signal for reporting an emergency condition to the door lock device, the door lock device determines if the user device is a paired device of the door lock device according to the request signal and further sends an emergency condition confirmation signal to the user device by way of wireless communication. The user device is then connected to the network server through the Internet and transmits an emergency condition signal to activate the network server to perform a push notification service and send an emergency condition message to the at least one recipient device. Given the push notification, the emergency condition message can be instantly provided to right recipients for emergency condition notification.

Abstract: An electronic system having wake up verification comprises an electronic device and a mobile device. The electronic device wirelessly connects to the mobile device. When the mobile device executes a verification program, the mobile device provides a sampling signal input interface on which a user can input a sampling signal. When the sampling signal is input, the mobile device transforms the sampling signal into sampling data and transmits the sampling data to the electronic device. The electronic device verifies the sampling data. When the sampling data are correct, the electronic device executes an operation system. When the sampling data are incorrect, the electronic device cannot execute the operation system. Therefore, information stored in the electronic device can be protected by two factor authentication to increase reliability for safeguarding information.

Abstract: A smart electronic float includes: an accelerometer, sensing a movement distance, a movement velocity, movement power, and a sinking gravity of the smart electronic float in water, to produce a corresponding plurality of pieces of float movement data; a microcontroller, receiving the float movement data sensed by the accelerometer; a first wireless communications device, where the microcontroller transmits the float movement data to an electronic device through the first wireless communications device, and receives a light-emitting diode (LED) on/off signal from the electronic device; and an LED, where on/off of the LED is controlled by the microcontroller according to the LED on/off signal.

Abstract: A smart electronic float includes: an accelerometer, sensing a movement distance, a movement velocity, movement power, and a sinking gravity of the smart electronic float in water, to produce a corresponding plurality of pieces of float movement data; a microcontroller, receiving the float movement data sensed by the accelerometer; a first wireless communications device, where the microcontroller transmits the float movement data to an electronic device through the first wireless communications device, and receives a light-emitting diode (LED) on/off signal from the electronic device; and an LED, where on/off of the LED is controlled by the microcontroller according to the LED on/off signal.

Abstract: An electronic system having wake up verification comprises an electronic device and a mobile device. The electronic device wirelessly connects to the mobile device. When the mobile device executes a verification program, the mobile device provides a sampling signal input interface on which a user can input a sampling signal. When the sampling signal is input, the mobile device transforms the sampling signal into sampling data and transmits the sampling data to the electronic device. The electronic device verifies the sampling data. When the sampling data are correct, the electronic device executes an operation system. When the sampling data are incorrect, the electronic device cannot execute the operation system. Therefore, information stored in the electronic device can be protected by two factor authentication to increase reliability for safeguarding information.

Abstract: A method for controlling a touch device to power on or power off has steps of receiving direction information of the touch device; determining if the touch device is oriented to a direction that is outside or inside a preset viewing angle according to the direction information; detecting a gesture present on the touch device; and performing a power-saving function or a power-on function when detecting the gesture present on the touch device and determining that the direction of the touch device is outside or inside the preset viewing angle. The foregoing technique can replace the power-saving function and the power-on function activated by pressing a physical power button. Accordingly, operational frequency and failure rate of the physical power button can be reduced and an intuitive method for powering on or off the touch device with easy operation can thus be provided.

Abstract: A light-emitting diode (LED) driving circuit for driving a plurality of first lightbars and a plurality of second lightbars is provided. The LED driving circuit includes a first current mirror, a second current mirror and a control circuit. The first current mirror, if enabled, balances currents of the first lightbars. The second current mirror, if enabled, balances currents of the second lightbars. During a first period, the control circuit disables the second current mirror and adjusts the duration of enabling the first current mirror according to a dimming signal. During a second period, the control circuit disables the first current mirror and adjusts the duration of enabling the second current mirror according to the dimming signal. Therefore, only the first lightbars or the second lightbars are driven in each period.

Abstract: A light-emitting diode (LED) driving circuit for driving a plurality of first lightbars and a plurality of second lightbars is provided. The LED driving circuit includes a first current mirror, a second current mirror and a control circuit. The first current mirror, if enabled, balances currents of the first lightbars. The second current mirror, if enabled, balances currents of the second lightbars. During a first period, the control circuit disables the second current mirror and adjusts the duration of enabling the first current mirror according to a dimming signal. During a second period, the control circuit disables the first current mirror and adjusts the duration of enabling the second current mirror according to the dimming signal. Therefore, only the first lightbars or the second lightbars are driven in each period.

Abstract: A light-emitting diode (LED) driving circuit for driving a plurality of first lightbars and a plurality of second lightbars is provided. The LED driving circuit includes a first current mirror, a second current mirror and a control circuit. The first current mirror, if enabled, balances currents of the first lightbars. The second current mirror, if enabled, balances currents of the second lightbars. During a first period, the control circuit disables the second current mirror and adjusts the duration of enabling the first current mirror according to a dimming signal. During a second period, the control circuit disables the first current mirror and adjusts the duration of enabling the second current mirror according to the dimming signal. Therefore, only the first lightbars or the second lightbars are driven in each period.

Abstract: A light-emitting diode (LED) current balance circuit includes a reference current generator, a current mirror and a voltage compensation circuit. The reference current generator provides a reference current robust against disturbance in a supply voltage applied to the reference current generator. The current mirror generates, according to the reference current, sink currents to bias lightbars and employs a structure to reduce the influence of unmatched transistors on the sink currents to stabilize and clamp currents through the lightbar. The voltage compensation circuit detects the voltages across the lightbars to compensate the lightbars having various forward voltages to ensure the turn-on of all lightbars and to effectively balance the currents through the lightbars. Therefore, a simpler circuit architecture is employed which does not need a specific-purpose LED controller to be cheaper and more competitive.

Abstract: A light-emitting diode (LED) driving circuit for driving a plurality of first lightbars and a plurality of second lightbars includes a first current mirror, a second current mirror and a control circuit. The first current mirror, if enabled, balances current among the first lightbars. The second current mirror, if enabled, balances current among the second lightbars. During a first period, the control circuit disables the second current mirror and adjusts the duration of enabling the first current mirror according to a dimming signal. During a second period, the control circuit disables the first current mirror and adjusts the duration of enabling the second current mirror according to the dimming signal. Therefore, only first or second lightbars are driven in each period.

Abstract: A light-emitting diode (LED) current balance circuit includes a reference current generator, a current mirror and a voltage compensation circuit. The reference current generator provides a reference current robust against disturbance in a supply voltage applied to the reference current generator. The current mirror generates, according to the reference current, sink currents to bias lightbars and employs a structure to reduce the influence of unmatched transistors on the sink currents so as to stabilize and clamp currents through the lightbar. The voltage compensation circuit detects the voltages across the lightbars to compensate the lightbars having various forward voltages so as to ensure the turn-on of all lightbars and effectively balance the currents through the lightbars. Therefore, the invention employs simpler circuit architecture and not need a specific-purpose LED controller so as to be cheaper and more competitive.

Abstract: A light-emitting diode (LED) driving circuit for driving a plurality of first lightbars and a plurality of second lightbars includes a first current mirror, a second current mirror and a control circuit. The first current mirror, if enabled, balances current among the first lightbars. The second current mirror, if enabled, balances current among the second lightbars. During a first period, the control circuit disables the second current mirror and adjusts the duration of enabling the first current mirror according to a dimming signal. During a second period, the control circuit disables the first current mirror and adjusts the duration of enabling the second current mirror according to the dimming signal. Therefore, only first or second lightbars are driven in each period.