Abstract: A glass lightproof and sun-shading heat insulation film that is pasted to use repeatedly, belongs to the technical area of a protective film and includes a thermal-insulation surface film. A bottom of the thermal-insulation surface film is a soft statics adsorption film, and a bottom of the soft statics adsorption film is a protective base film. In pasting the heat insulation film, there is no need to use a sticker to connect the glass to the heat insulation film. Therefore, the probability of leaving the sticker on the glass surface is reduced, which decreases the difficulty in pasting the film and lowers the difficulty in cleaning the old heat insulation film. The products of glass heat insulation film can be accepted and used by more people, and when a car is flooded abruptly or falls into water accidentally, a user can break the glass window more easily to survive.

Abstract: A microphone circuit includes a signal generating module, a filtering module, a transmitting module and a switch module. The signal generating module transforms audio signals into electronic signals. The filtering module is connected to the signal generating module to filter the electronic signals sent from the signal generating module. The transmitting module is connected to the filtering module to transmit the signals sent from the filtering module. The switch module is connected to the signal generating module to selectively regulate the microphone circuit to function as a differential microphone circuit or a single-ended microphone circuit.

Abstract: A microphone circuit includes a signal generating module, a filtering module, a transmitting module and a switch module. The signal generating module transforms audio signals into electronic signals. The filtering module is connected to the signal generating module to filter the electronic signals sent from the signal generating module. The transmitting module is connected to the filtering module to transmit the signals sent from the filtering module. The switch module is connected to the signal generating module to selectively regulate the microphone circuit to function as a differential microphone circuit or a single-ended microphone circuit.

Abstract: A vibrating apparatus installed in a portable electronic device includes a vibrator, a regulator connected to the vibrator, and a controller connected to the regulator. The controller generates controlling signals and sends the controlling signals to the regulator to actuating the vibrator to vibrate and regulates vibrating parameters of the vibrator.