Abstract: The invention provides a three-dimensional (3D) image processing circuit and a synchronization signal correction method thereof. The 3D image processing circuit is adapted to process a 3D image signal. The 3D image signal includes an image synchronization signal and a view switching signal. The 3D image processing circuit includes a synchronization signal correction circuit coupled to the image processing circuit. A synchronization circuit of the synchronization signal correction circuit receives an image synchronization signal processed by the image processing circuit and simultaneously receives the view switching signal. The synchronization circuit compares the processed image synchronization signal with the view switching signal, so as to output a view switching signal synchronized with the processed image synchronization signal. The invention further provides an image display device including the above 3D image processing circuit.

Abstract: A projection system, a light beam generating device thereof and a method for controlling light beam luminance are provided. The light beam generating device includes a first controller, a driver, an illuminating device, a sensing device and a second controller. The driver generates a driving current according to a control command. The illuminating device generates an output light beam according to the driving current. The sensing device detects the driving current and the output light beam to respectively generate a sensing current signal and a sensing luminance signal. The second controller generates an adjustment signal according to the sensing current signal and the sensing luminance signal. The first controller or the second controller generates the control command according to the adjustment signal, and a computing speed of the second controller is greater than a computing speed of the first controller.

Abstract: A projection system, a light beam generating device thereof and a method for controlling light beam luminance are provided. The light beam generating device includes a first controller, a driver, an illuminating device, a sensing device and a second controller. The driver generates a driving current according to a control command. The illuminating device generates an output light beam according to the driving current. The sensing device detects the driving current and the output light beam to respectively generate a sensing current signal and a sensing luminance signal. The second controller generates an adjustment signal according to the sensing current signal and the sensing luminance signal. The first controller or the second controller generates the control command according to the adjustment signal, and a computing speed of the second controller is greater than a computing speed of the first controller.

Abstract: A projector, a projecting system and a transmission delay detection method thereof are provided. The projector includes an image processor and a delay calculator. The image processor, in a test mode, receives a first test image signal through an input end during a first time period, generates a first processed image signal through an output end, receives a second test image signal through the input end during a second time period, and generates a second processed image signal through the output end. The delay calculator detects a first time point at which the input end of the image processor receiving the first test image signal and a second time point at which a signal on the output end of the signal processor to translate from the first processed image signal to the second processed signal, and generates a first transmission delay according to the first and second time points.

Abstract: A projector, a projecting system and a transmission delay detection method thereof are provided. The projector includes an image processor and a delay calculator. The image processor, in a test mode, receives a first test image signal through an input end during a first time period, generates a first processed image signal through an output end, receives a second test image signal through the input end during a second time period, and generates a second processed image signal through the output end. The delay calculator detects a first time point at which the input end of the image processor receiving the first test image signal and a second time point at which a signal on the output end of the signal processor to translate from the first processed image signal to the second processed signal, and generates a first transmission delay according to the first and second time points.