Abstract: A lens module includes a lens assembly, an actuator, an encoder, and a controller. The actuator is connected to the lens assembly. The encoder is connected to the actuator and linked with the actuator. The encoder includes a first portion and a second portion. The first portion includes multiple areas, and each of the areas includes at least one conductor. The second portion includes multiple conductive contacts. When the actuator drives the encoder to move, the second portion moves relative to the first portion, and the encoder outputs a voltage signal according to whether the conductive contacts are in contact with the at least one conductor in the areas. The controller is electrically connected to the encoder and the actuator. The controller determines a state of the encoder according to the voltage signal. A projection device and a method for adjusting the lens module are also disclosed.

Abstract: A projector and an autofocus method are provided. The projector includes a ranging unit, an inertial sensor, a control module, and a lens module. The lens module includes a projection lens and a focusing motor. When the projector is in a first mode, the control module compares an inertial sensing signal with an activation threshold to generate a first comparison result, and determines accordingly whether to switch the projector from the first mode to a second mode. When the projector is in the second mode, the ranging unit continuously detects a distance between the projector and a projection surface to generate a distance signal, and the control module generates a corresponding focusing signal to the focusing motor according to the distance signal so as to drive the focusing motor to adjust a focal length of the projection lens according to the focusing signal.

Abstract: A projection system and a projection method are provided. The projection system includes a projection module, an image capture apparatus, an input apparatus, and a processor. The processor is configured to: receive an input signal from the input apparatus and generate an input command accordingly; drive the image capture apparatus to obtain a target captured image, where the target captured image includes a target image corresponding to a target object; transmit the target captured image and the input command to a cloud server; receive an analysis result generated by an artificial intelligence computing module according to the input command and the target image from the cloud server; determine display information according to the analysis result, and calculate a display position of the display information within a projection range; and drive the projection module to project an information image with display information.

Abstract: An interactive rear projection system including a projection screen, a projection optical engine, an input device and a controller is provided. The projection optical engine emits a projection beam which is projected on the projection screen. The input device includes a sensor and a first light source both disposed on a first side of the projection screen. The controller is electrically connected to the projection optical engine, the sensor, and the first light source and controls the first light source to project a first beam toward the projection screen. When an object approaches a second side of the projection screen, the sensor senses a light spot generated by the first beam diffusely reflected by the object and recognizes a position of the object or a position where the object touches the projection screen according to the light spot.

Abstract: A projection device and an auto-focus method of the projection device are provided. A projection distance between a projection lens of the projection device and a projection surface is detected to generate a distance detection signal. A control unit updates an expanded look-up table based on the original look-up table, the distance detection signal, an optimal motor step, and an adjustment completion time, where the optimal motor step and the adjustment completion time are obtained through a manual focus operation. An auto-focus operation is performed based on the distance detection signal and the updated expanded look-up table.

Abstract: A lens module includes a lens assembly, an actuator, an encoder, and a controller. The actuator is connected to the lens assembly. The encoder is connected to the actuator and linked with the actuator. The encoder includes a first portion and a second portion. The first portion includes multiple areas, and each of the areas includes at least one conductor. The second portion includes multiple conductive contacts. When the actuator drives the encoder to move, the second portion moves relative to the first portion, and the encoder outputs a voltage signal according to whether the conductive contacts are in contact with the at least one conductor in the areas. The controller is electrically connected to the encoder and the actuator. The controller determines a state of the encoder according to the voltage signal. A projection device and a method for adjusting the lens module are also disclosed.

Abstract: An interactive rear projection system including a projection screen, a projection optical engine, an input device and a controller is provided. The projection optical engine emits a projection beam which is projected on the projection screen. The input device includes a sensor and a first light source both disposed on a first side of the projection screen. The controller is electrically connected to the projection optical engine, the sensor, and the first light source and controls the first light source to project a first beam toward the projection screen. When an object approaches a second side of the projection screen, the sensor senses a light spot generated by the first beam diffusely reflected by the object and recognizes a position of the object or a position where the object touches the projection screen according to the light spot.

Abstract: A projection apparatus is provided. A gear structure and a positioning piece in the projection lens module are disposed about opposite sides outside the lens barrel. The gear structure and the positioning piece rotates around an optical axis of the lens barrel acting as a rotating axis. Moreover, when the gear structure rotates, the positioning piece rotates relative to the gear structure. A transmission gear of the motor module meshes with the gear structure to drive the gear structure to rotate. The positioning module is disposed next to the positioning piece and is configured for measuring rotation of the positioning piece to generate a positioning signal. The controller controls the motor module to drive the transmission gear, receives the positioning signal, and calculates a backlash between the transmission gear and the gear structure according to the positioning signal. A backlash detecting system and a method thereof are provided.

Abstract: A projection device includes a light source, an optical engine and a controller. The light source provides a light beam according to a setting current. The optical engine includes a light combining module, an imaging module and a projection lens. The light combining module receives the light beam to generate an illumination beam. The imaging module includes a prism, a digital micromirror device and a light sensor. The prism transmits a portion of the illumination beam to the light sensor. The digital micromirror device converts the other portion of the illumination light beam into an image beam. The light sensor disposed between the prism and the digital micromirror device receives the portion of the illumination beam to generate a brightness data. The projection lens projects the image beam. The controller dynamically adjusts the setting current to calibrate a color point of the light beam according to the brightness data.

Abstract: A projection device includes a light source, an optical engine and a controller. The light source provides a light beam according to a setting current. The optical engine includes a light combining module, an imaging module and a projection lens. The light combining module receives the light beam to generate an illumination beam. The imaging module includes a prism, a digital micromirror device and a light sensor. The prism transmits a portion of the illumination beam to the light sensor. The digital micromirror device converts the other portion of the illumination light beam into an image beam. The light sensor disposed between the prism and the digital micromirror device receives the portion of the illumination beam to generate a brightness data. The projection lens projects the image beam. The controller dynamically adjusts the setting current to calibrate a color point of the light beam according to the brightness data.

Abstract: A projection system and a projection method thereof are provided. The projection system includes a projection apparatus and a portable electronic apparatus. The projection apparatus includes a first communication unit, a projection unit and a first control unit. The first communication unit establishes a communication connection with the portable electronic apparatus to receive an identification signal from the portable electronic apparatus. The identification signal includes predetermined projection setup information. The first control unit controls the projection unit to project a image according to the predetermined projection setup information corresponding to the identification signal.

Abstract: A projection apparatus is provided. A gear structure and a positioning piece in the projection lens module are disposed about opposite sides outside the lens barrel. The gear structure and the positioning piece rotates around an optical axis of the lens barrel acting as a rotating axis. Moreover, when the gear structure rotates, the positioning piece rotates relative to the gear structure. A transmission gear of the motor module meshes with the gear structure to drive the gear structure to rotate. The positioning module is disposed next to the positioning piece and is configured for measuring rotation of the positioning piece to generate a positioning signal. The controller controls the motor module to drive the transmission gear, receives the positioning signal, and calculates a backlash between the transmission gear and the gear structure according to the positioning signal. A backlash detecting system and a method thereof are provided.

Abstract: A lighting system and a multi-mode lighting device thereof are provided. The multi-mode lighting device includes a wireless communication unit, a lighting unit, a projection unit, and a processing unit. The processing unit is coupled to the wireless communication unit, the lighting unit, and the projection unit. The processing unit is configured to selectively operate in one of multiple modes, wherein the multiple modes include a lighting mode and a projection mode. The processing unit is adapted to control the lighting unit to provide illumination light when the processing unit operates in the lighting mode. The processing unit is adapted to receive a video signal provided by an electronic device via the wireless communication unit and control the projection unit to project an image based on the video signal when the processing unit operates in the projection mode.

Abstract: A sorting device is provided. The sorting device includes: a carrier substrate; an input unit disposed on the carrier substrate for inputting a biological sample into the sorting device; a porous material disposed on the carrier substrate and adjacent to the input unit, wherein the porous material contains antigen molecules having specificity to a target biological analyte; a driving module generating at least one driving force in the porous material so as to sort the biological sample based on the affinity for the antigen and the driving force; and an output unit disposed on the carrier substrate and adjacent to the porous material for collecting the sorted target biological analyte. A sorting method is also provided.

Abstract: A projection system and a method for correcting projection image are provided. The projection system includes a projection target, a projection apparatus and an image capturing device. The projection target includes a reference pattern, and receives an image beam to display a projection image in collaboration with the image beam. The projection apparatus projects the image beam to the projection target. The image capturing device captures a captured image having the projection image, and outputs the captured image to the projection apparatus. The projection apparatus adjusts a projection parameter of the image beam according to the projection image in the captured image. Based on the adjusted projection parameter, the corrected projection image displayed by the image beam corresponds to the reference pattern.

Abstract: A projection system, a projection apparatus, and a method for operating the projection apparatus are provided. According to a characteristic of a sound transmitted between the projection apparatus and an electronic device external to the projection apparatus, the projection apparatus is adapted to be controlled by the electronic device or is adapted to control the electronic device to execute a corresponding operation.

Abstract: A sorting device is provided. The sorting device includes: a carrier substrate; an input unit disposed on the carrier substrate for inputting a biological sample into the sorting device; a porous material disposed on the carrier substrate and adjacent to the input unit, wherein the porous material contains antigen molecules having specificity to a target biological analyte; a driving module generating at least one driving force in the porous material so as to sort the biological sample based on the affinity for the antigen and the driving force; and an output unit disposed on the carrier substrate and adjacent to the porous material for collecting the sorted target biological analyte. A sorting method is also provided.

Abstract: A projection system, a projection apparatus and a projection method of the projection system are provided. The projection apparatus of the projection system projects an image according to image data, and captures subtitle information included in the image data. A projection unit of the projection apparatus projects the image. A control unit of the projection unit is coupled to the projection unit for capturing subtitle information. A communication unit of the projection apparatus is coupled to the control unit. A network device of the projection system stores subtitle comparison information. The communication unit communicates with the network device, and is controlled by the control unit to transmit the subtitle information to the network device. The network device compares the subtitle information with the subtitle comparison information to acquire video information corresponding to the image data.

Abstract: A projection system, a projection apparatus, and a method for operating the projection apparatus are provided. According to a characteristic of a sound transmitted between the projection apparatus and an electronic device external to the projection apparatus, the projection apparatus is adapted to be controlled by the electronic device or is adapted to control the electronic device to execute a corresponding operation.

Abstract: A lighting system and a multi-mode lighting device thereof are provided. The multi-mode lighting device includes a wireless communication unit, a lighting unit, a projection unit, and a processing unit. The processing unit is coupled to the wireless communication unit, the lighting unit, and the projection unit. The processing unit is configured to selectively operate in one of multiple modes, wherein the multiple modes include a lighting mode and a projection mode. The processing unit is adapted to control the lighting unit to provide illumination light when the processing unit operates in the lighting mode. The processing unit is adapted to receive a video signal provided by an electronic device via the wireless communication unit and control the projection unit to project an image based on the video signal when the processing unit operates in the projection mode.