Abstract:
A safety lamp comprises a lamp body and two electric connecting portions, wherein the lamp body has a light emitting module and the two electric connecting portions are respectively disposed on two sides of the lamp body; each of the electric connecting portions further comprises a first electric connecting terminal, a pressing switch unit, an elastic conductive unit and a second electric connecting terminal, wherein each of the pressing switch units must sustain a pressing force to urge against the corresponding elastic conductive unit to deform and to electrically connect the corresponding first electric connecting terminal to the corresponding second electric connecting terminal through the elastic conductive unit. Alternatively, when the pressing switch unit is released from the pressing force, the deformed elastic conductive unit reforms back to an opposite direction of the pressing force to form an open circuit. .----- 62 f ig. 2
Abstract:
A driving circuit for light emitting elements comprises a rectifying unit, a first constant current unit, a first driving transistor, a first voltage control unit and at least one first light emitting element. The rectifying unit has a 5 first terminal and a second terminal, is connected to an external power source that provides alternating current power that is sinusoidal and has alternating negative and positive segments, inverts the negative segmEnts of the AC power to positive segments and forms a pulsating direct current voltage. The first constant current unit has a first end and a second end. 10 The first driving transistor comprises a first gate, a first drain and a first source. The first voltage control unit comprises a first variable resistor and a first bias control element. The first light emitting element has a first end and a second end. o z en cz w
Abstract:
1 The invention provides a light emitting device driving circuit, comprising a 2 rectification unit, a current limiting unit and a load. The load comprises a first light 3 emitting device, a reverse voltage providing unit and a second light emitting device 4 connected in serial. When the rectification unit rectifies an alternate current voltage to 5 output a direct current voltage, and the current limiting unit limits the direct current in 6 a predetermined value, the direct current is provided to the first light emitting device 7 or the second light emitting device for operation. The reverse voltage providing unit 8 provides a reverse voltage to reduce the total operating voltage of the light emitting 9 devices in order to enhance the driving efficiency and the power factor. current limiting unit first light emitting device / AC rect if ication unit reverse voltage providing unit / second light emitting device' Fig. I
Abstract:
A constant current device in accordance with the present invention is connected to an external voltage source and comprises an input unit, a driving transistor and a voltage control unit. The input unit is connected to the external voltage source. The driving transistor is used to output constant current. The voltage control unit makes the driving output constant current and comprises at least one resistor and a semiconductor load, and has a resistor voltage, the resistor comprising an input and an output.
Abstract:
The invention provides a light emitting device driving circuit, comprising a rectification unit, a current limiting unit and a load. The load comprises a first light emitting device, a reverse voltage providing unit and a second light emitting device connected in serial. When the rectification unit rectifies an alternate current voltage to output a direct current voltage, and the current limiting unit limits the direct current in a predetermined value, the direct current is provided to the first light emitting device or the second light emitting device for operation. The reverse voltage providing unit provides a reverse voltage to reduce the total operating voltage of the light emitting devices in order to enhance the driving efficiency and the power factor.
Abstract:
A lamp assembly includes a bottom seat and a lampshade. The lampshade includes a lamp cover holding a light emitting element therein, and a connecting arm having a first end connected to the lamp cover and a second end connected pivotally to the bottom seat at a pivot point thereof. The lamp cover and the connecting arm are integrally formed with each other as one-piece unit.
Abstract:
An electrical connector assembly includes an electrical plug connector and an electrical receptacle connector. The electrical plug connector includes plug fixation members. The electrical receptacle connector includes receptacle fixation members. Through the engagement between the plug fixation member and the receptacle fixation member, upon using the electrical connector assembly, the electrical plug connector can be ensured not to detach from the electrical receptacle connector. Moreover, with simple operations of the plug fixation member and the receptacle fixation member, the electrical plug connector can be detached from the electrical receptacle connector smoothly.
Abstract:
A terminal structure includes a terminal body, a locking means formed on at least one face of the terminal body, an insertion unit extending from a first end of the terminal body, and a holding mechanism extending from a second end of the terminal body. The insertion unit is mounted on a circuit board. The circuit board defines multiple conducting holes. The insertion unit is inserted into and locked in one of the conducting holes of the circuit board. The holding mechanism includes two opposite clamping arms and a clamping space defined between the two clamping arms. An electronic element is held by the holding mechanism. The electronic element has multiple lead legs. One of the lead legs of the electronic element is clamped between the two clamping arms and held in the clamping space.