Abstract: A projection lens, a control method thereof, and a projection device are provided. The projection lens is adapted for the projection device, and includes a lens body including an aperture assembly and a lens element group; an aperture adjustment module disposed on the lens body, connected to the aperture assembly, and configured to adjust the aperture assembly; a lens element adjustment module disposed on the lens body, connected to the lens element group, and configured to adjust the lens element group; and a switching assembly coupled to the aperture adjustment module and the lens element adjustment module. The switching assembly is configured to switch to a first state, so that the lens element adjustment module adjusts the lens element group, and the switching assembly is configured to switch to a second state, so that the aperture adjustment module group adjusts the aperture assembly.

Abstract: An infrared (IR) light source module for providing an IR light beam includes at least one circuit substrate, first IR light-emitting elements, and second IR light-emitting elements. The first IR light-emitting elements are disposed on the at least one circuit substrate. The first IR light-emitting elements are used to provide a first light beam. The second IR light-emitting elements are disposed on the at least one circuit substrate. The second IR light-emitting elements are used to provide a second light beam. The IR light beam includes at least one of a first light beam and a second light beam, wherein a wavelength of the first light beam is greater than or equal to 700 nm and less than or equal to 780 nm, and a wavelength of the second light beam is greater than 780 nm and less than or equal to 1000 nm.

Abstract: A projection device, including an illumination system, a first light valve, a light modulation module, and a projection lens, is provided. The illumination system is configured to provide an illumination light beam. The first light valve is disposed on a transmission path of the illumination light beam to convert the illumination light beam into an image light beam. The light modulation module is replaceably disposed in the projection device and includes a second light valve located on the transmission path of the illumination light beam to modulate a grayscale value of the illumination light beam and reflect the illumination light beam to the first light valve. The light modulation module is located between the illumination system and the first light valve. The projection lens is disposed on a transmission path of the image light beam to project the image light beam out of the projection device.

Abstract: Disclosed is a projector, including a plurality of imaging modules and a control unit. The imaging modules are configured to provide the first light beam, the second light beam, and the third light beam of different wavelengths. The imaging modules include a first imaging module, a second imaging module, and a third imaging module. The control unit respectively provides a first signal, a second signal, and a third signal to the first imaging module, the second imaging module, and the third imaging module. The first imaging module to the third imaging module alternately provide the first light beam to the third light beam respectively according to the first signal to the third signal to form an image light beam. At the same time sequence, the light beams provided by the first imaging module to the third imaging module have different wavelengths.

Abstract: A projection system includes projection devices and a control device. Each projection device is configured to provide first, second, and third light beams of different wavelengths. The projection devices include processors and light valves. The processors include first, second, and third processors. The light valves include first, second, and third light valves. Each of the processors is connected to one of the light valves. The control device respectively provides first, second, and third signals to the first, second, and third processors. The first, second, and third processors respectively control the first, second, and third light valves to provide the first, second, and third light beams in turn according to the first, second, and third signals, so as to generate an image beam; in the same time sequence, the light beams provided by the first, second, and third valves controlled by the first, second, and third processors have different wavelengths.

Abstract: A projection device and a projection method thereof are provided. The projection device includes a spatial modulator, a first optical actuator, a driving circuit, and a control circuit. The spatial modulator modulates a beam to generate an image beam. The driving circuit is coupled to the first optical actuator, determines a swinging mode of the first optical actuator according to an input video signal, and converts a display frame into sub-display frames corresponding to the swinging mode. The control circuit is coupled to the spatial modulator and the driving circuit, controls the spatial modulator to generate the image beam according to the sub-display frames, and outputs synchronization signals corresponding to the sub-display frames to the driving circuit. The driving circuit drives the first optical actuator to swing according to the synchronization signals and the swinging mode to change an optical path of the image beam to generate a projection image.

Abstract: A projection positioning system and a projection positioning method thereof are provided. A projection device projects a first test image and a second test image on a projection screen based on a projection range at different time points. At least one photosensitive element is disposed on the projection screen. In response to projecting the first test image, a computing device divides a first image sub-zone of the first test image according to the first image sub-zone corresponding to one of first optical parameters sensed by the photosensitive element, to generate the second test image. In response to projecting the second test image, the computing device determines positioning information of the photosensitive element with respect to the projection range according to a second image sub-zone corresponding to one of second optical parameters sensed by the photosensitive element. The projection device performs a projection adjustment function according to the positioning information.

Abstract: A projection positioning system and a projection positioning method thereof are provided. A projection device projects a first test image and a second test image on a projection screen based on a projection range at different time points. At least one photosensitive element is disposed on the projection screen. In response to projecting the first test image, a computing device divides a first image sub-zone of the first test image according to the first image sub-zone corresponding to one of first optical parameters sensed by the photosensitive element, to generate the second test image. In response to projecting the second test image, the computing device determines positioning information of the photosensitive element with respect to the projection range according to a second image sub-zone corresponding to one of second optical parameters sensed by the photosensitive element. The projection device performs a projection adjustment function according to the positioning information.

Abstract: The disclosure provides an electronic whiteboard system and an operation method. The electronic whiteboard system includes an electronic whiteboard, an electronic device, and a first writing device. The electronic whiteboard has a capacitive touch function. The electronic device is coupled to the electronic whiteboard and includes a display. The first writing device includes a first contact surface. The electronic whiteboard receives a first touch input of the first contact surface and generates a first signal strength corresponding to the first touch input. The electronic device displays the first touch input on the display in a first color corresponding to the first signal strength. The electronic whiteboard system and the operation method of the disclosure can display the color corresponding to the signal strength of the touch input on the display of the electronic whiteboard system.

Abstract: A touch display apparatus is provided. The touch display apparatus including at least one touch display unit, and the at least one touch display unit includes a first surface, a plurality of light-emitting elements, a first touch electrode layer and a second touch electrode layer. The plurality of light-emitting elements are located on the first surface. The first touch electrode layer is located on the first surface, and has a plurality of first axial electrodes extending along a first direction. The second touch electrode layer has a plurality of second axial electrodes extending along a second direction. Orthographic projections of the first axial electrodes on the first surface and orthographic projections of the second axial electrodes on the first surface commonly surround a plurality of closed regions, and the plurality of light-emitting elements are respectively located in the corresponding closed regions.

Abstract: An electronic whiteboard system, an operating method and an electronic whiteboard are provided. The electronic whiteboard system includes an electronic whiteboard and an electronic device. The electronic whiteboard includes a functional area. The electronic device is coupled to the electronic whiteboard and includes a display. The electronic whiteboard receives a touch input to generate coordinate information corresponding to the touch input. The electronic whiteboard transmits the coordinate information to the electronic device. The electronic device receiving the coordinate information determines whether the coordinate information is located in the functional area of the electronic whiteboard. If yes, the electronic device executes a function corresponding to the coordinate information. If not, the electronic device displays the touch input corresponding to the coordinate information on the display.

Abstract: An electronic whiteboard, an electronic whiteboard system, and a control method thereof are provided. The electronic whiteboard includes a plurality of color selecting regions and a track input region. The color selecting regions respectively correspond to a plurality of track colors. Each color selecting region serves to receive a first touch operation and generates a color setting signal according to the first touch operation. The track input region receives a second touch operation and generates a touch point reporting signal according to the second touch operation. The touch point reporting signal serves to construct a writing track, and the color setting signal serves to set a color of the writing track. The electronic apparatus generates an output file according to the writing track and displays file contents of the output file in the set color on the display panel according to the color setting signal.

Abstract: A touch projection screen includes a substrate, a first touch layer, a second touch layer, a reflective projection film and a circuit board. The substrate has a first surface and a second surface. The first touch layer is disposed on the first surface and extends around an edge of the substrate to cover a part of the second surface of the substrate. The second touch layer is disposed on the first touch layer and extends around an edge of the substrate to cover a part of the second surface of the substrate. The reflective projection film is disposed on the second touch layer. The circuit board is disposed on the second surface of the substrate and electrically connects the first and second touch layers. A touch projection system includes the touch projection screen and a projection device. The projection device projects an image beam onto the touch projection screen.

Abstract: An electronic whiteboard and a touch sensing signal transferring method thereof are provided. The electronic whiteboard includes a touch area. A first signal transmission port and a second signal transmission port are disposed on the electronic whiteboard, and a touch sensing signal detected from the touch area is transmitted to the signal transmission port coupled to a signal receiving apparatus.

Abstract: A writing device including a conductive pen tube, a pen head and a conductive ink is provided. The conductive pen tube contains the conductive ink adapted to be erased. The conductive ink is electrically connected to the conductive pen tube. At least a part of an outside surface of the conductive pen tube contacting a user is a conductor. The pen head is connected to the conductive pen tube. The pen head is used for outputting the conductive ink to a writing surface to form a physical handwriting on the writing surface. When the pen head contacts the writing surface, the writing surface generates a signal.

Abstract: The disclosure provides a wiping device configured for a touch surface having capacitive touch function. The wiping device includes a shell, a plurality of induction elements and an erasing body. The shell includes a conductive material. The induction elements are respectively electrically connected to the shell. The induction elements are separated from each other. The erasing body is disposed on the induction element. At least a portion of the erasing body includes an insulating material. When the wiping device is in contact with the touch surface, at least two of the induction elements enable the touch surface to generate an erasing function command. The disclosure can simultaneously erase handwriting of writing device on the touch surface and delete writing track information corresponding to handwriting of writing device in the electronic device.

Abstract: A stylus including a pen rod, an ink core, and an electrically conductive element and a touch system are provided. The pen rod has an opening and the material thereof includes an electrically conductive material. The ink core is partially disposed inside the pen rod and a section of the ink core protrudes out of the opening. A terminal of the section is adapted to touch a touch writing surface to form an ink script on the touch writing surface. The electrically conductive element is disposed at the opening of the pen rod and includes a ring-shaped portion located between the opening of the pen rod and the terminal of the section. When the terminal of the ink core touches the touch writing surface, a gap is maintained between the ring-shaped portion and the touch writing surface and a touch sensing signal is generated.

Abstract: A touch projection screen including a substrate, touch layers, and a reflective projection film is provided. The touch layers and the reflective projection film are sequentially disposed on the substrate, and the touch layers are located between the substrate and the reflective projection film. Each of the touch layers comprises a base layer and an electrode pattern disposed on the base layer. Each electrode pattern includes a plurality of electrode line sets. Each electrode line set includes a plurality of electrode lines and a plurality of electrode segments. The electrode lines are arranged to be parallel to each other. An included angle between each of the electrode segments and one of the electrode lines is an acute angle. Two ends of each electrode segment are connected to the corresponding electrode lines. In addition, a touch projection system including the touch projection screen and a projection device is provided.

Abstract: A touch projection screen including a first substrate, a plurality of first touch layers, a plurality of second touch layers, and a reflective projection film is provided. The first touch layers are disposed on the first substrate and at least two of the first touch layers are arranged adjacent to each other. Each of the first touch layers includes a first base layer and a first patterned electrode disposed on the first base layer. The second touch layers are disposed on the first touch layers and at least two of the second touch layers are arranged adjacent to each other. Each of the second touch layers includes a second base layer and a second patterned electrode disposed on the second base layer. The reflective projection film is disposed on the second touch layers. A manufacturing method of the touch projection screen is also provided.

Abstract: A projection screen includes a plurality of projection plates and at least one fixing component. Each of the projection plates has a projection surface and at least one connection side. Through the connection sides, the projection surfaces of the projection plates lean against each other to be coplanar. The fixing component includes two fixing sections connected with each other, wherein the two connection sides leant against each other are clipped at the two fixing sections, respectively.