Abstract: A ceiling LCD mounting structure includes a mounting base fixedly fastened to the ceiling of a car, the mounting base defining a bottom receiving chamber, a pivot shaft coupled between two clamping plates in a top side of the mounting base and held down by at least one holding down plate and adapted to be rotated relative to the clamping plates, and a LCD holder frame holding a LCD (liquid crystal display), the LCD holder frame having mounting flange inserted through an opening in the mounting base and fastened to the pivot shaft for enabling the LCD holder frame to be turned in and out of a bottom receiving chamber of the mounting base and positioned in one of a series of angular positions.

Abstract: A switching type AC adapter includes a current mode PWM (pulse-width-modulated) controller, a monostable multivibrator, and a MOSFET so arranged that the current mode PWM controller and the monostable multivibrator are operated to let switching of the MOSFET be synchronized to synchronous signal from a synchronous circuit when the switching type AC adapter is electrically connected, enabling horizontal synchronizing interference to be concealed behind retrace time, and kept away from the screen of video equipment in which the switching type AC adapter is installed.

Abstract: A speaker cabinet and monitor housing mounting arrangement which includes a monitor housing having one opening near a back side thereof remote from the display screen mounted thereon, at least one retaining notch at a first end of the opening, and at least one locating slot at a second end of the opening; and a speaker cabinet mounted in the opening on the monitor housing, the speaker cabinet having a shock absorbing cushion mounted in a coupling groove at one end thereof adapted for holding a voice output device, at least one projecting rod at one end respectively fitted into at least one retaining notch at the first end of the opening on the monitor housing, and at least one hook at an opposite end respectively hooked on at least one locating slot at the second end of the opening on the monitor housing.