Abstract: A projection apparatus and a control method thereof are provided. The projection apparatus includes a light source, an optical engine, a first sensor, and a processor. The light source provides a light beam to the optical engine. The optical engine converts the light beam into an image beam and projects the same out of the projection apparatus. The first sensor senses an ambient temperature. The processor is coupled to the optical engine, the light source, and the first sensor, records a projection time of the optical engine, selects a selected temperature range in which the ambient temperature is included from multiple temperature ranges according to the ambient temperature, and selects a selected driving program from multiple driving programs corresponding to the temperature ranges according to the selected temperature range to control the light source. A brightness of light beam is negatively related to the projection time.

Abstract: The invention relates to an image playing system and an image playing method. The image playing system includes a projection device. The projection device includes a storage circuit, a processor, and a projection module. The storage circuit stores a playing content including at least one multimedia content, a play time length and a play order corresponding to each multimedia content. The processor obtains the playing content from the storage circuit in response to receiving the power signal. The projection module is controlled by the processor and sequentially projects the multimedia content according to the play time length and play order corresponding to each multimedia content.

Abstract: An electronic-device control system and an electronic-device control method are provided. The electronic-device control system includes an electronic device having multiple pogo pads acting as an interface and a control device performing at least one preset operation on the electronic device. The control device includes: a pogo-pin module, including multiple pogo pins corresponding to the pogo pads to form a one-to-one correspondence to be connected via contact or disconnected; and a signal transfer unit, receiving from an external computer a second specification signal converted from a first specification signal, and transmitting the second specification signal to the corresponding pogo pin among the multiple pogo pins. A special firmware communication interface is configured by adapting the electronic-device control system and the electronic-device control method to update or control the electronic device, protecting the electronic device from malicious updates.

Abstract: A projection apparatus and a control method thereof are provided. The projection apparatus includes a light source, an optical engine, a first sensor, and a processor. The light source provides a light beam to the optical engine. The optical engine converts the light beam into an image beam and projects the same out of the projection apparatus. The first sensor senses an ambient temperature. The processor is coupled to the optical engine, the light source, and the first sensor, records a projection time of the optical engine, selects a selected temperature range in which the ambient temperature is included from multiple temperature ranges according to the ambient temperature, and selects a selected driving program from multiple driving programs corresponding to the temperature ranges according to the selected temperature range to control the light source. A brightness of light beam is negatively related to the projection time.

Abstract: The invention relates to an image playing system and an image playing method. The image playing system includes a projection device. The projection device includes a storage circuit, a processor, and a projection module. The storage circuit stores a playing content including at least one multimedia content, a play time length and a play order corresponding to each multimedia content. The processor obtains the playing content from the storage circuit in response to receiving the power signal. The projection module is controlled by the processor and sequentially projects the multimedia content according to the play time length and play order corresponding to each multimedia content.

Abstract: The invention provides projection device, a projection method and a projection system. The projection system includes the projection device. The projection method is for controlling the projection device. The projection device includes a projection apparatus, a video and audio processing circuit and a power control circuit. The video and audio processing circuit is coupled to the projection apparatus. The power control circuit is coupled to the projection apparatus and the video and audio processing circuit. The power control circuit is for receiving a power signal correspondingly provided by an external power supply unit when a switchable mechanism is in an open state. The power control circuit enables the projection apparatus and the video and audio processing circuit according to the power signal, such that the video and audio processing circuit outputs image data to the projection apparatus and controls the projection apparatus to project a dynamic projection image.

Abstract: The invention provides projection device, a projection method and a projection system. The projection system includes the projection device. The projection method is for controlling the projection device. The projection device includes a projection apparatus, a video and audio processing circuit and a power control circuit. The video and audio processing circuit is coupled to the projection apparatus. The power control circuit is coupled to the projection apparatus and the video and audio processing circuit. The power control circuit is for receiving a power signal correspondingly provided by an external power supply unit when a switchable mechanism is in an open state. The power control circuit enables the projection apparatus and the video and audio processing circuit according to the power signal, such that the video and audio processing circuit outputs image data to the projection apparatus and controls the projection apparatus to project a dynamic projection image.

Abstract: A projection correction method adapted to a projector. The projection correction method includes: sensing a temperature of a body of the projector, so as to obtain a first temperature value, where a focusing gear of the projector is located at a first gear position; determining whether the temperature of the body of the projector is changed, and when the temperature of the body of the projector is changed from the first temperature value to a second temperature value, the focusing gear is rotated by a predetermined distance to rotate the focusing gear to a second gear position; and determining whether a storage device stores a target gear position corresponding to the second temperature value, so as to rotate the focusing gear to the target gear position. Moreover, a projector using the aforementioned projection correction method is also provided.

Abstract: A projection device and a luminance control method of a frame are provided. The luminance control method of the frame includes the following steps. Whether the frame is a dark-like frame or not is determined according to a gray level distribution of the frame and whether at least one sub-frame of the frame is a dark-like sub-frame or not is determined according to a gray level distribution of the sub-frame. When the frame is the dark-like frame and the sub-frame is not the dark-like sub-frame, a corresponding area of the sub-frame is ignored and a reference value of luminance is computed according to a part corresponding to the unignored area in the frame. The luminance of a projection light of the projection device is adjusted according to the reference value of luminance.

Abstract: A projection correction method adapted to a projector. The projection correction method includes: sensing a temperature of a body of the projector, so as to obtain a first temperature value, where a focusing gear of the projector is located at a first gear position; determining whether the temperature of the body of the projector is changed, and when the temperature of the body of the projector is changed from the first temperature value to a second temperature value, the focusing gear is rotated by a predetermined distance to rotate the focusing gear to a second gear position; and determining whether a storage device stores a target gear position corresponding to the second temperature value, so as to rotate the focusing gear to the target gear position. Moreover, a projector using the aforementioned projection correction method is also provided.

Abstract: A projection device and a luminance control method of a frame are provided. The luminance control method of the frame includes the following steps. Whether the frame is a dark-like frame or not is determined according to a gray level distribution of the frame and whether at least one sub-frame of the frame is a dark-like sub-frame or not is determined according to a gray level distribution of the sub-frame. When the frame is the dark-like frame and the sub-frame is not the dark-like sub-frame, a corresponding area of the sub-frame is ignored and a reference value of luminance is computed according to a part corresponding to the unignored area in the frame. The luminance of a projection light of the projection device is adjusted according to the reference value of luminance.

Abstract: A projector suspension device includes a casing and a suspension mechanism. The casing defines a space for accommodating an optical projection engine, and the casing has a trough extending into an inside of the casing. The suspension mechanism includes a fixed rod and a movable rod, and the fixed rod is disposed inside and fixed to the casing. One end of the movable rod is connected to the fixed rod, and another end of the movable rod is fixed to a stationary object. The movable rod is slidably coupled to the fixed rod and slides relative to the fixed rod so as to be stored inside the trough or to stick out from the trough.

Abstract: A projector suspension device includes a casing and a suspension mechanism. The casing defines a space for accommodating an optical projection engine, and the casing has a trough extending into an inside of the casing. The suspension mechanism includes a fixed rod and a movable rod, and the fixed rod is disposed inside and fixed to the casing. One end of the movable rod is connected to the fixed rod, and another end of the movable rod is fixed to a stationary object. The movable rod is slidably coupled to the fixed rod and slides relative to the fixed rod so as to be stored inside the trough or to stick out from the trough.

Abstract: A method of calibrating projection lens in a projector is disclosed herein. The method includes setting a coordinate matrix over a visible region of a projector, checking whether a coordinate of a mobile target of the projection lens is located within the visible region, and moving the projection lens to the coordinate of the mobile target when the coordinate of the mobile target is confirmed to be located within the visible region.