摘要:
An embodiment multilevel inverter comprises a first boost apparatus having an input coupled to a positive dc bus and a second boost apparatus having an input coupled to a negative dc bus. The multilevel inverter further comprise a first switch coupled to an input of an L-C filter and the first boost apparatus, a second switch coupled to the input of the L-C filter and the second boost apparatus, a third switch coupled between the positive dc bus and the first switch and a fourth switch coupled between the negative dc bus and the second switch.
摘要:
A backlight module includes a printed circuit board (PCB), and a light emitting diode (LEDs) arranged on the PCB. The PCB is configured with a fixing structure(s) for fixing the LED. The LEDs are configured with butting structures for butting with the fixing structures. The LEDs are mechanically fixed to the fixing structures of the PCB by the butting structures of the LEDs. The LEDs fixed by the fixing structures and the butting structures are removably connected, which facilitates replacement of the LEDs.
摘要:
A testing device including a first connector, a control unit, a first detecting circuit and a memory controller is provided. The first connector is electrically connected to a first bus. The control unit generates a plurality of first control signals according to a first enable signal from the first connector. The first detecting circuit is electrically connected to a plurality of first transmission lines in the first bus, and sequentially conducts the first transmission lines to a ground according to the first control signals. The memory controller detects states of the signals transmitted by the first transmission lines and determines whether to generate a first abnormal indication signal according to a detecting result. The control unit controls a plurality of indication lights according to the first abnormal indication signal.
摘要:
A silicon condenser microphone is disclosed. The microphone includes a transducer, an IC chip, a first board, a second board spaced from the first board by a frame, and a third board located between the first board and the second board. A cavity is accordingly formed by the first board, the frame and the third board to accommodate the transducer and the IC chip. The IC chip is electrically connected to a surface of the third board facing the second board. The microphone provides an enlarged back volume to the transducer and provides the transducer with a shield against electro-magnetic interference. A manufacturing process is also disclosed.
摘要:
The present invention provides a flat panel display device, which includes a backlight system and a display panel. The backlight system includes a light source, a light homogenization mechanism, and a back frame. The back frame carries the light source and the light homogenization mechanism, and the light homogenization mechanism guides light from the light source into the display panel. The back frame includes primary assembling pieces, secondary assembling pieces, and a bracing piece for fixing a circuit board. The primary assembling pieces are connected through joining. Further, the primary assembling piece includes a joint section that forms a reinforcement structure and a circuit board is mountable and position adjustable through a bracing piece. The present invention also provides a stereoscopic display device and a plasma display device. The present invention have a back frame having a simple structure, reduce the expenditure of a back frame mold, allow strength of the back frame to meet a desired requirement, improve fixing of circuit board, and save the material used for back frame so as to lower down the manufacturing cost of flat panel display device.
摘要:
The present invention provides a backlight system, which includes an LED light source, which includes an LED lamp and an LED substrate carrying the LED lamp; a back frame, which is disposed below the LED substrate and includes at least two primary assembling pieces, the at least two primary assembling pieces being joined to form a main frame structure of the back frame; and a PCB, which is disposed below the back frame and fixed to the LED substrate. The backlight system of the present invention saves the material and space of the back frame, and lowers down the cost of the backlight system.
摘要:
The present invention discloses a display device and a backlight module. The backlight module comprises a waveguide, a reflector, a backframe and a shimming device. The reflector arranged behind the waveguide. The backframe carries and supports the waveguide and the reflector. An light inlet edge of the waveguide and the backframe is defined with a gap in which a shimming device is seated within the gap so as to effectively support the waveguide. This arrangement can effectively prevent the warpage or bending of the waveguide in the area of the light inlet area. Stabilizing the efficiency of illumination of the backlight module. As a result, the insufficient of illumination of the waveguide encountered by the prior art is avoided.
摘要:
The present invention provides a flat panel display device, which includes a backlight system and a display panel. The backlight system includes a light source, a light homogenization mechanism, and a back frame. The back frame carries the light source and the light homogenization mechanism, and the light homogenization mechanism guides light from the light source into the display panel. The back frame includes primary assembling pieces, secondary assembling pieces, and an adjustable bracing piece. Through the arrangement of a reinforcement structure on a joint section of the primary assembling piece, the strength of the back frame is improved. Available mounting points between the bracing piece and the primary assembling pieces or the secondary assembling pieces are of a number of at least two so that the bracing piece is selectively mounted to the back frame at different positions. The present invention also provides a stereoscopic display device and a plasma display device. The present invention has a back frame having a simple structure, reduces the expenditure of the back frame mold, and also saves the material used for back frame so as to lower down the cost of flat panel display device.
摘要:
A flat panel display device includes a backlight system and a display panel, wherein: the backlight system includes a light source, a light homogenization mechanism, and a back frame; the back frame carries the light source and the light homogenization mechanism and the back frame includes at least first and second primary assembling pieces, wherein the first primary assembling piece has an end forming at least two joint sections, each of the joint sections having a structure mating an end of the second primary assembling piece, the first primary assembling piece using one of the joint sections to join the corresponding end of the second primary assembling piece. The back frame further includes secondary assembling pieces. The primary assembling pieces and/or the secondary assembling pieces form bumps. A stereoscopic display device and a plasma display device are also provided.
摘要:
The present invention provides a back frame of flat panel display device, which includes primary assembling pieces, secondary assembling pieces, and an adjustable bracing piece. The primary assembling pieces have a number of at least two, and the at least two primary assembling pieces are connected through joining to form a main frame structure of the back frame. The secondary assembling pieces are joined to the primary assembling pieces. According to practical needs of the main frame structure, different materials are used for primary assembling pieces at different locations. The back frame further includes the bracing piece that is mounted to the primary assembling pieces or the secondary assembling pieces. The available mounting points between the bracing piece and the primary assembling pieces or the secondary assembling pieces are of a number of at least two so that the bracing piece is selectively mounted to the back frame at different positions. The present invention also provides a backlight system. The back frame and the backlight system of the present invention have a simple back frame structure, reduce the expenditure of the back frame mold, and also save the material used for back frame so as to lower down the cost of flat panel display device and meet different requirements for mounting.