Benq Corporation

Shih-Chuan Ho

The invention provides a sound generating module including a baffle and a speaker. The baffle has a containing opening. The speaker is disposed on the baffle and in the containing opening. A sound spectrum of the speaker itself has at least one peak. A wavelength corresponding to the at least one peak includes λ. The baffle has at least one first sound hole. A distance from a center of the first sound hole to a center of the speaker is greater than or equal to λ/4 and is less than or equal to λ/2.

Sound generating module

A detection circuit for detecting a transmission directionality of a transmission line is provided. The detection circuit includes a sending terminal, a receiving terminal, a detection signal generator, a comparison circuit, and an output circuit. The sending terminal is connected to a first terminal of a transmission line. The receiving terminal is connected to a second terminal of the transmission line. The detection signal generator provides a detection signal to the sending terminal. The comparison circuit receives the detection signal and a transmission signal from the receiving terminal, and compares the detection signal and the transmission signal to generate a comparison result. The output circuit outputs one of a first detection result signal and a second detection result signal according to the comparison result.

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Taipei, Taiwan

Shih-Chuan Ho