Abstract: Disclosed are an image generating device and a communication circuit thereof. The communication circuit includes a first pull-up resistor, an unidirectional current component, a signal isolation component and a signal switch. The first pull-up resistor receives a standby voltage. The unidirectional current component is coupled between the first pull-up resistor and a (CEC) pin. The signal isolation component is coupled to a path between the pin CEC and the signal switch, where a first end of the signal isolation component is controlled by the standby voltage. The signal switch is coupled to a second end of the signal isolation component, and the signal switch couples the second end of the signal isolation component to a second pull-up resistor of a processor or the signal switch couples the second end of the signal isolation component to a third pull-up resistor of a port according to a system voltage.

Abstract: A projection device and a driving method of the projection device are provided. The projection device includes a signal processing circuit, a driving circuit, a light-emitting module, and a discharge circuit. The signal processing circuit is configured to provide a modulation signal and a first signal. The driving circuit is coupled to the signal processing circuit and a driving node. The driving circuit is configured to generate a driving signal to the driving node according to the modulation signal. The light-emitting module is coupled to the driving circuit through the driving node. The light-emitting module is configured to receive the driving signal from the driving node to accordingly emit a laser beam. The discharge circuit is coupled to the signal processing circuit and the driving node. The discharge circuit is configured to provide a reference voltage to the driving node according to the first signal.

Abstract: A power supply 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 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 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.

Abstract: A projection device including a casing, an operation module, a main board, and a conducting element is provided. The operation module includes an operation element and an operation circuit board. The operation element is disposed on the casing to execute a first operation. The operation circuit board is coupled to the operation element. The operation circuit board includes a wireless signal emitter and a first conducting portion. The operation circuit board generates a first operation signal in response to the first operation, and the wireless signal emitter emits the first operation signal. The main board includes a wireless signal receiver and a second conducting portion. The wireless signal receiver is configured to receive the first operation signal, and the main board is configured to execute a first action corresponding to the first operation signal. The conducting element is electrically connected to the first conducting portion and the second conducting portion.

Abstract: A projection device, a light source system and a projection method thereof are provided. A portion of the light-emitting units are controlled to provide a light beam as the first light beam. It is detected whether characteristic parameters of the light-emitting units providing the light beam reach a preset value. When the preset value is not reached, the light-emitting units providing the light beam are disabled, and the remaining light-emitting units are controlled to provide the back-up light beam as the first light beam. A portion of the first light beam is converted into a second light beam. The first light beam of which the wavelength is not converted and the second light beam are combined to generate an illumination beam. The illumination beam is converted into an image beam. The image beam is converted into a projection beam.

Abstract: An illumination system, a projection apparatus and an illumination control method are provided. The illumination system includes an excitation light source, an optical component, a light source driver, a temperature sensing module and a controller. The excitation light source emits an excitation light beam. The optical component is located on a transmission path of the excitation light beam. The light source driver is configured to drive the excitation light source. The temperature sensing module is located in a neighboring region of the optical component and configured to sense a temperature of the neighboring region of the optical component to output a sensing voltage. The controller is configured to receive the sensing voltage to determine whether the sensing voltage falls out of a predetermined voltage range and configured to output a control signal to the light source driver to adjust the excitation light beam.

Abstract: A projection device, a light source system and a projection method thereof are provided. A portion of the light-emitting units are controlled to provide a light beam as the first light beam. It is detected whether characteristic parameters of the light-emitting units providing the light beam reach a preset value. When the preset value is not reached, the light-emitting units providing the light beam are disabled, and the remaining light-emitting units are controlled to provide the back-up light beam as the first light beam. A portion of the first light beam is converted into a second light beam. The first light beam of which the wavelength is not converted and the second light beam are combined to generate an illumination beam. The illumination beam is converted into an image beam. The image beam is converted into a projection beam.

Abstract: A light detecting element for detecting rotations of a wheel is provided. The light detecting element includes a circuit board and an optical transceiver component. The circuit board has a first conductive layer and a first insulation layer. The first conductive layer has a first heat dissipation region, and the first insulation layer covers the first conductive layer and exposes the first heat dissipation region. The optical transceiver component is disposed on the first heat dissipation region and electrically connected to the circuit board. The optical transceiver component includes a light emitter and a light receiver, the light emitter is adapted to emit a light signal to the wheel, and the light receiver is adapted to receive the light signal reflected from the wheel. The invention further provides a projection apparatus having the light detecting element.

Abstract: A three-dimensional (3D) glasses and a method for operating the same are provided. The 3D glasses includes a first lens, a second lens, an infrared receiver and a control unit. The infrared receiver receives an infrared signal to output a digital control signal. The control unit is coupled to the infrared receiver. The control unit controls a first state of the first lens and a second state of the second lens according to a first pulse of the digital control signal, where at least one of the first state and the second state is an OFF state.