Coretronic Corporation

Yu-Chi Wu

Wen-Chang Chien

Tzu-Hai Chung

Pei-Yu Li

Jeng-An Liao

Wei-Tai Ko

A power supply circuit module and a power supply judgment method thereof are provided. A power supply circuit supplies power to an electronic device coupled to the power supply circuit module. A plugging detection circuit detects the connection state of the electronic device. A judgment circuit switches the electronic device to connect to a first signal channel or a second signal channel in response to whether the electronic device provides device information of the electronic device within a preset time since the electronic device is coupled to the power supply circuit module. The power supply judgment method of the invention automatically sets signal channel configurations corresponding to different external devices, thereby greatly improving the convenience of use.

Power supply circuit module and power supply judgment method thereof

A projection apparatus includes a light valve, a lens module, a distance measuring module, a lens position detection module and a processor. The light valve forms an image beam. The lens module projects the image beam onto a display surface. The distance measuring module detects a distance between the lens module and the display surface to obtain a first distance value. The lens position detection module detects a position of the lens module to obtain a second distance value. The processor receives the first distance value from the distance measuring module, receives the second distance value from the lens position detection module and obtains an effective focus range according to the second distance value.

Projection apparatus and auto-focusing method

A projection system and a keystone correction method are provided. The projection system includes: a projector projecting an image to a projection zone; an image capturing device capturing a captured image including the projection zone; and a processor. The processor divides the captured image into multiple focusing zones, and controls a stepper motor to shift focusing on the focusing zones at edges to obtain a step of the stepper motor and a distance for each of the focusing zones with a maximum clarity value. The distance is a projection distance between a lens module and the focusing zone. The processor calculates an included angle between the direction of a light axis of the projector and the projection zone according to the distances of the focusing zones at the edges, and performs a warping operation on a projection image according to the included angle.

Projection system and keystone correction method

A projection system and a projection control method are provided. The projection system includes a projection apparatus and a projection data providing apparatus. After receiving projection data, the projection apparatus enters an operating mode from a sleep mode and projects an image light beam according to the projection data. The projection data providing apparatus determines whether an input operation is received, and transmits the projection data to the projection apparatus if the input operation is received.

Growing community of inventors

Hsin-Chu, Taiwan

Yu-Chi Wu