Abstract: A touch input device is provided. The touch input device includes a touch panel and a touch control. The touch panel includes a number of touch sensor groups, each touch sensor group includes a line of touch sensors, each touch sensor produces a touch signal in response to a user's touch, the touch sensor groups are arranged on the touch panel one by one along a predetermined path, the quantity of touch sensors of each touch sensor group is increased or decreased gradually, and the arrangement direction of the touch sensors of each touch sensor group is perpendicular to the direction of the predetermined path. The touch control is connected to the touch panel and is used to receive the touch signals produced by the touch sensor, and determine a touch path according to the changes of the quantity of the received touch signals.

Abstract: An electronic device includes a power management unit, a touch panel including a first touch area and a second touch area, a first indicator, a second indicator, and a processing unit. The first touch area and the second touch area are respectively located on two sides of the touch panel, and is used to produce touch signals in response to a user's touch. The position of the first indicator and a second indicator are respectively corresponding to the first touch area and the second touch area. The processing unit controls the power management unit to provide power to the first indicator only when determining the first touch area is touched by the user according to the touch signals received by it, and control the power management unit to provide power to the second indicator only when determining the second touch area is touched.

Abstract: A control circuit for an electrical load in an electronic device includes a voltage divider, a current measurement circuit, a variable-current-output switch and a comparison circuit, the voltage entering the load and the voltage (and thus current) exiting from the load being monitored and compared to a reference voltage, any difference causing the switch to dynamically adjust the level of current being supplied, to protect the load from sudden variations in power supply and ensure a stable and constant supply of power.

Abstract: An LED lighting device is provided. The LED lighting device includes a processing unit, a sensor, a MOSFET, and an LED. When the sensor detects a frequency or voltage fluctuation, the processing unit modulates the duty cycle of the MOSFET to reduce the energy consumption of the LED light device and improve the efficiency of luminance of the LED lighting device.

Abstract: A touch input device is provided. The touch input device includes a touch panel and a touch control. The touch panel includes a number of touch sensor groups, each touch sensor group includes a line of touch sensors, each touch sensor produces a touch signal in response to a user's touch, the touch sensor groups are arranged on the touch panel one by one along a predetermined path, the quantity of touch sensors of each touch sensor group is increased or decreased gradually, and the arrangement direction of the touch sensors of each touch sensor group is perpendicular to the direction of the predetermined path. The touch control is connected to the touch panel and is used to receive the touch signals produced by the touch sensor, and determine a touch path according to the changes of the quantity of the received touch signals.

Abstract: An electronic device includes a power management unit, a touch panel including a first touch area and a second touch area, a first indicator, a second indicator, and a processing unit. The first touch area and the second touch area are respectively located on two sides of the touch panel, and is used to produce touch signals in response to a user's touch. The position of the first indicator and a second indicator are respectively corresponding to the first touch area and the second touch area. The processing unit controls the power management unit to provide power to the first indicator only when determining the first touch area is touched by the user according to the touch signals received by it, and control the power management unit to provide power to the second indicator only when determining the second touch area is touched.

Abstract: A device providing illumination by LED includes an illuminating module including a circuit board. The circuit board includes a plurality of LED groups arranged thereon, where each of the plurality of LED groups includes a plurality of LED units connected with each other in series. The plurality of LED units forms an LED matrix, and at least three LED units in each row of the LED matrix belong to different LED groups. Each of the LED units in each column of the LED matrix belongs to a respective LED group. An LED matrix is also provided.

Abstract: An illumination apparatus including an LED comprises a battery holder, an AC/DC adapter interface, an LED unit, and a switch unit. The battery holder is configured to receive a battery. The AC/DC adapter interface is connected to an AC/DC adapter. When the AC/DC adapter is not connected to the AC/DC adapter interface, the switch unit is turned on to allow the driving unit to receive power from the battery. When the AC/DC adapter is connected to the AC/DC adapter interface, the switch unit is turned off to allow the driving unit to receive power from the AC/DC adapter. A driving circuit applied in an illumination apparatus is also provided.

Abstract: A switching circuit system includes a rectification circuit, a transformer, a light-emitting unit, a touch panel including a plurality of touch sensors, and a central processing unit (CPU). The CPU determines that a first user operation is taken place on the touch panel when first and second touch signals from at least two touch sensors have been received within a predetermined time interval, and further determines the track of the touches according to the sequence in which the first and second touch signals were received when the first user operation was determined. The CPU further directs the transformer to control the voltage output to the light-emitting unit according to the determined touch track to control the switching circuit system to execute a first function, and otherwise, a second user operation is determined which executes a second function. A related method is also provided.

Abstract: An LED (light emitting diode) driving circuit includes a rectifying circuit, an LED module, a voltage dropping circuit connected to the LED module, a voltage detecting circuit connected between the voltage dropping circuit and the LED module, and an integrated circuit. The integrated circuit includes a pulse-width modulation (PWM) control module providing PWM waves, an overcurrent protection (OCP) module, an overvoltage protection (OVP) module, and a frequency control module. The OCP module detects the working current of the LED module, and the OVP module detects the working voltage. The frequency control module adjust the duty cycle of the PWM waves according to the results of comparisons made by the OCP module and the OVP module against reference levels, to adjust the working current of the LED module.

Abstract: A light emitting diode (LED) illumination apparatus includes an LED illumination circuit and a constant current drive circuit to provide constant current to the LED illumination circuit. The LED illumination circuit includes at least two lighting branches connected in parallel, and each of the at least two lighting branches includes at least one LED and a current regulative diode connected in series.

Abstract: An illumination apparatus including an LED comprises a battery holder, an AC/DC adapter interface, an LED unit, and a switch unit. The battery holder is configured to receive a battery. The AC/DC adapter interface is connected to an AC/DC adapter. When the AC/DC adapter is not connected to the AC/DC adapter interface, the switch unit is turned on to allow the driving unit to receive power from the battery. When the AC/DC adapter is connected to the AC/DC adapter interface, the switch unit is turned off to allow the driving unit to receive power from the AC/DC adapter. A driving circuit applied in an illumination apparatus is also provided.