Weltrend Semiconductor Inc.

Ming-Hung Kao

Meng-Che Tsai

Ta Hsien

A universal serial bus (USB) Type-C interface architecture includes a USB plug, a USB socket, a power delivery controller, a first pin, a second pin, a first resistor switch, a second resistance switch, a third resistance switch and a fourth resistance switch. The first pin includes a first end coupled to the USB plug, and a second end coupled to the power delivery controller. The second pin includes a first end coupled to the USB plug, and a second end coupled to the power delivery controller. The first resistance switch controls the connection between a first resistor and the first pin. The second resistor switch controls the connection between a second resistor and the first pin. The third resistor switch controls the connection between a third resistor and the second pin. The fourth resistor switch controls the connection between a fourth resistor and the second pin.

Universal serial bus architecture

A projector focusing method includes acquiring a plane angle of a light beam and acquiring a first distance and a second distance between two sides of a light beam edge displayed on a projection plane and a time of flight device after the time of flight device emits the light beam to the projection plane, acquiring a plane equation of the projection plane according to the first distance and the second distance, acquiring an optical axis vector of a digital micro-mirror device (DMD) disposed inside the projector, designating target coordinates of the DMD, converting the target coordinates to the projection target coordinates on the projection plane according to the plane equation, acquiring an customized emitting vector according to the projection target coordinates and a lens position of the projector, and acquiring an ideal focal distances of the projector according to the customized emitting vector and the optical axis vector.

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Hsinchu, Taiwan

Ming-Hung Kao