The present invention discloses a light-emitting diode lamp for connecting to an external current source. The LED lamp comprises: a lighting source comprising a plurality of LEDs; a power control module for connecting in parallel to the external current source; and a driver unit connected between the power control module and the lighting source, wherein the power control module is configured to transform a source voltage of the external current source to a desired load voltage based on output power requirement of the plurality of LEDs; and the driver unit is configured to rectify the desired load voltage and output a driving voltage to drive the plurality of LEDs. Without the need to modify a lamp base of a conventional High Intensity Discharge lamp, the LED lamp of the present invention can be directly used to replace the HID lamp. Moreover, the power control module of the present invention ensures that LED lamps of different power have consistent shapes and dimensions, thus enhancing the versatility of components of the LED lamp and reducing the production costs.

A device for providing power to a light arrangement (1) having a current conducting state and a current blocking state. The device comprises a storage circuit (2) with a capacitor (21) coupled to the light arrangement (1) and a resistor (22) located in parallel to the capacitor, a first determination circuit (3) for determining the state of the lighting arrangement, a second determination circuit (4) for, in the current blocking state, determining points of two discharging curves of the storage circuit, a derivation circuit (5) for deriving a condition of the storage circuit, such as life-end, from the discharging curves, a switch circuit (6) comprising an element (61), wherein the switch circuit is configured to switch the element (61) in parallel to the capacitor (21), whereby a first discharging curve is determined with the element being disconnected from the capacitor and a second discharging curve is determined with the element being connected to the capacitor, the capacitor discharging via both the resistor (22) and the element (61). The element (61) may comprise a resistor, a capacitor or an inductor.

A discharge lamp driving device includes a discharge lamp driving unit; and a control unit, in which the control unit controls the discharge lamp driving unit so that a first driving current which causes a first electrode to serve as an anode and a second driving current which causes a second electrode to serve as an anode are alternately supplied to the discharge lamp, a period of the first driving current is changed according to a periodic first pattern, and a period of the second driving current is changed according to a periodic second pattern, in which the first pattern and the second pattern are patterns in which the length of the periods over which the respective driving current is supplied decrease over time within each cycle of the pattern, and in which the cycle of the first pattern is phase-shifted relative to the cycle of the second pattern.

In a discharge lamp driver, a control section is configured to alternately repeat a first period in which an AC current is supplied and a second period in which a DC current is supplied, and when a first drive power lower than a rated power of the discharge lamp is supplied and an accumulated lighting time of the discharge lamp is shorter than a predetermined time, the control section is configured to set the length of the first period to be greater than that in a case where the first drive power is supplied and the accumulated lighting time is equal to or longer than the predetermined time, and set the frequency of the AC current during the first period to be higher than that in the case where the first drive power is supplied and the accumulated lighting time is equal to or longer than the predetermined time.

The invention describes an ignitor arrangement (1) for a high-intensity discharge lamp (2), which ignitor arrangement (1) comprises a first pair of input terminals (101, 102) for applying an ignition voltage to the ignitor arrangement (1); a second pair of input terminals (101, 103) for applying an input drive voltage to the ignitor arrangement (1); and a discharge resistor (10) arranged in the interior (100) of the ignitor arrangement (1) and connected across the first input terminal pair (101, 102), which discharge resistor (10) is realized as a temperature-dependent resistor (10). The invention also describes a lamp driver (3) realized to drive a high-intensity discharge lamp (2); a lighting arrangement (4); and a method of driving a high-intensity discharge lamp (2).

Provided is a switching power supply device having a very small switching loss, which includes a rectifier circuit for rectifying a commercial AC voltage, a full-bridge circuit having first to fourth switching element, a transformer having a single primary coil and an N number of secondary coils, an N number of rectifying and smoothing circuits, an output detecting circuit for detecting at least one of voltage and current output from each rectifying and smoothing circuit, and a control circuit. Each rectifying and smoothing circuit includes a rectifying unit, a secondary switching element for controlling an output of the rectified voltage, and a smoothing unit for smoothing the rectified voltage, and the control circuit turns on each secondary switching element during a predetermined time.

A discharge lamp driver includes a discharge lamp driving unit configured to supply drive current to a discharge lamp and a control unit configured to control the discharge lamp driving unit. The drive current has a modulation drive period in which a first period in which AC current having a frequency higher than 1 kHz is supplied and a second period in which DC current is supplied are alternately repeated. In the modulation drive period, the control unit periodically changes length of a first DC period included in the second periods and in which DC current of a first polarity is supplied, and length of a second DC period included in the second periods and in which DC current of a second polarity is supplied, and increases one of the length of the first DC period and the length of the second DC period while decrease the other one.

The present disclosure relates to a light attenuation controlling apparatus for a CDM lamp, comprising: a full-bridge inverter as a power source to supply an output to the CDM lamp; a driving circuit for driving the full-bridge inverter; a single-chip microcomputer connected to the driving circuit; a tube voltage sensing module, one end of which is connected to the full-bridge inverter so as to sense a tube voltage currently outputted by the full-bridge inverter to the CDM lamp, and through the other end of which the tube voltage of the CDM lamp is outputted to the single-chip microcomputer. The present disclosure provides a novel light attenuation controlling apparatus for a CDM lamp, which can effectively control light attenuation of the CDM lamp by constantly regulating the output of the full-bridge inverter, thereby enhancing duration of the CDM lamp.

A discharge lamp driver includes a discharge lamp drive unit, a control unit, and a voltage detection part. When an inter-electrode voltage is smaller than a first predetermined value, the control unit controls the discharge lamp drive unit to provide a mixed period in which a first period and a second period are alternately repeated and a third period alternately including a first direct-current period and a second direct-current period. A length of the first direct-current period is larger than a length of the second direct-current period. The length of the second direct-current period is smaller than 0.5 ms. A total of the lengths of the first direct-current periods in the third period is larger than a length of the second period. When the inter-electrode voltage is smaller than the first predetermined value, the control unit is configured to increase the length of the third period in a stepwise manner.

A mouse is provided, including a mouse module and a light-emitting module. The mouse module has a light-penetrable portion and a mouse base. The light-emitting module is disposed on the mouse base. The light-emitting module includes a substrate, a boost circuit and a plasma tube. The plasma tube has a light-emitting main body and two electrodes. At least part of the light-emitting main body corresponds to the light-penetrable portion.