Abstract: A projector including a lens, an IR emission circuit, an IR reception circuit and a central processing circuit is provided. The projector is controlled by a first infrared ray (IR) signal provided by a remote controller. The IR emission circuit emits a second IR signal to detect whether an obstacle is positioned on an optical path of the projection light. When an obstacle is positioned on the optical path, the second IR signal is reflected to the IR reception circuit via the obstacle. The IR reception circuit provides a first and a second output signal in response to the first and the second IR signal respectively. The central processing circuit determines that an obstacle is positioned on the optical path and accordingly alters an operational mode of the projector in response to the second output signal and controls the operation of the projector in response to the first output signal.

Abstract: A remote controller for controlling a selected electric appliance includes a code input interface for inputting an control identification code of the selected electric appliance, a instruction input interface for inputting a function instruction for controlling the operation of the electric appliance, a wireless transmission module for outputting wireless signals, and a control module for controlling the wireless transmission module to output a corresponding control identification code signal after the code input interface receives the control identification code of the electric appliance, and the control module also for controlling the wireless transmission module to output a corresponding function instruction signal after the instruction input interface receives the function instruction.

Abstract: A projector including a lens, an IR emission circuit, an IR reception circuit and a central processing circuit is provided. The projector is controlled by a first infrared ray (IR) signal provided by a remote controller. The IR emission circuit emits a second IR signal to detect whether an obstacle is positioned on an optical path of the projection light. When an obstacle is positioned on the optical path, the second IR signal is reflected to the IR reception circuit via the obstacle. The IR reception circuit provides a first and a second output signal in response to the first and the second IR signal respectively. The central processing circuit determines that an obstacle is positioned on the optical path and accordingly alters an operational mode of the projector in response to the second output signal and controls the operation of the projector in response to the first output signal.

Abstract: A remote controller for controlling a selected electric appliance includes a code input interface for inputting an control identification code of the selected electric appliance, a instruction input interface for inputting a function instruction for controlling the operation of the electric appliance, a wireless transmission module for outputting wireless signals, and a control module for controlling the wireless transmission module to output a corresponding control identification code signal after the code input interface receives the control identification code of the electric appliance, and the control module also for controlling the wireless transmission module to output a corresponding function instruction signal after the instruction input interface receives the function instruction.

Abstract: A digital light projector (DLP) enabling to support at least two digital micromirror devices (DMD) with different resolution is provided. Appending with a predetermined resolution, the DLP comprises a scalar transform unit and an image control unit. The scalar transform unit has a plurality of scalar firmware respect to various resolutions including the predetermined resolution stored therein. The image control unit electrically connects to the scalar transform unit and has a DMD firmware and a register number respect to the predetermined resolution. While the DLP is operating, the scalar transform unit reads the register number and chooses a proper scalar firmware accordingly.

Abstract: The invention relates to a software method for reducing the electromagnetic irradiation of the Phase Lock Loop (PLL) within an On-Screen Display Menu system. The method includes the steps as follows: setting the resolution of an OSD system to a predetermined pass value of Electromagnetic Interference (EMI); checking the OSD system; changing the resolution of the OSD system to a value to be displayed if the OSD system is started; keeping on the predetermined value of EMI if the OSD system is not started; repeating the checking of the OSD system step.

Abstract: The invention relates to a software method for reducing the electromagnetic irradiation of the Phase Lock Loop (PLL) within an On-Screen Display Menu system. The method includes the steps as follows: setting the resolution of an OSD system to a predetermined pass value of Electromagnetic Interference (EMI); checking the OSD system; changing the resolution of the OSD system to a value to be displayed if the OSD system is started; keeping on the predetermined value of EMI if the OSD system is not started; repeating the checking of the OSD system step.