Abstract: A lamp tube includes a lamp shade, connectors fixed to opposite ends of the lamp shade, and a circuit board received in the lamp shade and electrically connected with the connectors. At least two resilient members protrude from opposite sides of the circuit board. Each resilient member is resiliently deformed and urged into contact with an inner surface of the lamp shade. The deformation of the at least two resilient members is for providing a spring push force to the circuit board, thus causing the circuit board to tightly engage the inner surface of the lamp shade, thereby retaining the circuit board in position inside the lamp shade.

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 lamp tube includes a lamp shade, connectors fixed to opposite ends of the lamp shade, and a circuit board received in the lamp shade and electrically connected with the connectors. At least two resilient members protrude from opposite sides of the circuit board. Each resilient member is resiliently deformed and urged into contact with an inner surface of the lamp shade. The deformation of the at least two resilient members is for providing a spring push force to the circuit board, thus causing the circuit board to tightly engage the inner surface of the lamp shade, thereby retaining the circuit board in position inside the lamp shade.

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.