Abstract: A light source module includes a first light source, a second light source, a first reflective layer and a second reflective layer. The first light source is configured to emit a first light having a first wavelength. The second light source is configured to emit a second light having the first wavelength. The first reflective layer is disposed opposite to the first light source and configured to reflect the first light. The second reflective layer is disposed opposite to the second light source and configured to reflect the second light. The first reflective layer and the second reflective layer are configured to reflect light of any wavelength in a visible spectrum.

Abstract: A projection device, including a light source module and a color wheel, is provided. The light source module includes a plurality of solid-state lighting sources driven by a DC drive power to sequentially provide a first light generated by a first number of light sources, a second light generated by a second number of light sources and a third light generated by a third number of light sources within a response cycle, wherein the number of light sources to be turn on is less than or equivalent to a total number of solid-state lighting sources. The color wheel has a first block, a second block and a third block, respectively corresponding to the first to third lights, so that the projection device sequentially outputs a first color light with a first brightness, a second color light with a second brightness and a third color light with a third brightness.

Abstract: An ultrasonic transducer includes an ultrasonic transducer unit array and a circuit layer. The ultrasonic transducer unit array includes: a plurality of first array units and a plurality of second array units. At least two adjacent ones of the first array units are arranged along a first direction to form a first series string; at least two adjacent ones of the second array units are arranged along a second direction to form a second series string; the first series string and the second series string are intersected; and the first direction and the second direction form a non-180° angle. The circuit layer includes a first bridging unit connected in series with the first array units; and a second bridging unit connected in series with the second array units. The second bridging unit and the first bridging unit are not directly electrically connected to each other.

Abstract: A display device including a first casing, a second casing, and a connection structure is provided. The connection structure includes a rotation member, a locking assembly, a first locked portion, and a second locked portion. The rotation member is rotatably connected to the first casing. The locking assembly is movably connected to the rotation member and has a first locking portion and a second locking portion. The first locked portion is disposed on the first casing and locked by the first locking portion. The second locked portion is disposed on the second casing and locked by the second locking portion.

Abstract: An air guide module includes a casing and a first flexible air guide structure. The casing includes a first fixing portion. The first flexible air guide structure includes a first flexible cover and a second fixing portion connected to the first flexible cover. The first flexible air guide structure is fixed to the first fixing portion of the casing through the second fixing portion. The first flexible cover and a part of the casing form a heat dissipation channel. The first flexible cover is deflected relative to the casing when an airflow passes through the heat dissipation channel.

Abstract: A projector includes a lens, a beam processing module, a plurality of digital micromirror devices, a reflecting module and an illumination module. The beam processing module is disposed with respect to the lens. The digital micromirror devices are disposed around the beam processing module, wherein a beam projecting path is defined between the lens and the digital micromirror device. The reflecting module is disposed with respect to the digital micromirror devices and located beyond the beam projecting path. The illumination module is disposed with respect to the reflecting module. An initial beam projected by the illumination module is reflected to the digital micromirror devices by the reflecting module, such that the digital micromirror devices generate a plurality of image beams. The beam processing module combines the image beams to form a projecting beam and projects the projecting beam onto the lens along the beam projecting path.

Abstract: A method of controlling an intraoral scanner includes upon completion of lighting a first projection device, triggering a second projection device to initiate lighting, upon initiation of lighting the first projection device, transmitting a first camera trigger signal, a first delay circuit delaying the first camera trigger signal until completion of lighting the second projection device, and upon receiving the first camera trigger signal, a first camera and a second camera starting exposing images.

Abstract: A direct-lit backlight module includes a substrate, an optical layer that forms an accommodating space with the substrate, first light emitting units in the accommodating space, second light emitting units in the accommodating space and a control unit electrically connected to the first light emitting units and the second light emitting units. The first light emitting units emit light towards the optical layer and have a first viewing angle. The second light emitting units emit light towards the optical layer and have a second viewing angle. The control unit provides a control signal to selectively drive the first light emitting units and the second light emitting units. The first light emitting units are adjacent to the second light emitting units. The first light emitting units and the second light emitting units are arranged alternately. The first viewing angle is larger than the second viewing angle.

Abstract: A color calibrator includes a first casing, a second casing and an optical sensor. The first casing has an accommodating recess and a plurality of first positioning members, wherein the first positioning members are arranged along an axial direction of the accommodating recess. The second casing is telescopically disposed in the accommodating recess. The second casing has a second positioning member. One of the first positioning member and the second positioning member is a magnet. Another one of the first positioning member and the second positioning member is a magnet or a magnetic induction material. The second positioning member cooperates with one of the first positioning members to position the second casing at one of a plurality of telescopic positions with respect to the first casing. The optical sensor is disposed on the second casing.

Abstract: The application discloses a projection device comprising: a plurality of optical source modules; and a plurality of optical source driving circuits. Each of the optical source driving circuits includes: an optical source driving unit, for receiving and being controlled by a selection signal and a pulse width modulation signal, the pulse width modulation signal controlling a current amplitude of the drive current from the optical source driving unit to the optical source module; and a delay circuit for controlling the selection signal based on the adjusted threshold voltage to determine when to release the selection signal, the plurality of delay circuits in the plurality of optical source driving circuits release the selection signals synchronously, enabling the plurality of optical source driving circuits to synchronously output the plurality of drive currents to the plurality of optical source modules.

Abstract: An ultrasonic array manufacturing method is applied to an ultrasonic array and includes providing a piezoelectric material layer has at least one or a plurality of piezoelectric units with a first lateral side and a second lateral side opposite to each other, forming a first cutting slot in an oblique manner along a direction from the first lateral side to the second lateral side of each piezoelectric unit, forming a second cutting slot crossed by the first cutting slot on each piezoelectric unit, and coupling two electrode surfaces of each piezoelectric unit respectively to a first lead wire and a second lead wire.

Abstract: A lamp device includes a light-emitting element, a first clamping element, a second clamping element, an outer cover and a counterweight. The first clamping element is connected with the light-emitting element. The outer cover is disposed on the first clamping element. The counterweight is connected to the outer cover and is adjacent to a connection between the first clamping element and the second clamping element. When the lamp device clamps a screen, the second clamping element abuts against a back surface of the screen.

Abstract: A direct-lit backlight module includes a substrate, an optical layer that forms an accommodating space with the substrate, first light emitting units in the accommodating space, second light emitting units in the accommodating space and a control unit electrically connected to the first light emitting units and the second light emitting units. The first light emitting units emit light towards the optical layer and have a first viewing angle. The second light emitting units emit light towards the optical layer and have a second viewing angle. The control unit provides a control signal to selectively drive the first light emitting units and the second light emitting units. The first light emitting units are adjacent to the second light emitting units. The first light emitting units and the second light emitting units are arranged alternately. The first viewing angle is larger than the second viewing angle.

Abstract: An optical module includes a base, a holding component, an optical element, and at least one detachable structure. The holding component is disposed on the base, in which a position of the holding component relative to the base along a first axial direction is adjustable. The optical element is disposed on the holding component. The detachable structure is extended from one of the base and the holding component to face another one of the base and the holding component, so as to limit a position of the holding component relative to the base along a second axial direction.

Abstract: A multicolor light mixing module includes a collimator lens disposed on a light-entrance axis and having first and second lens portions, a laser source set including first and second lighting units arranged sequentially for emitting first and second color lights respectively, a reflective unit, a reflective diffusing member and a lens array disposed corresponding to at least one of the first and second lens portions for mixing the first and second color lights. The reflective unit is obliquely disposed on the light-entrance axis and opposite to the first and second lighting units for reflecting the first and second color lights to the first lens portion along the light-entrance axis. The reflective diffusing member is disposed at a side of the collimator lens to homogenize the first and second laser lights and reflect the first and second color lights to the second lens portion along a first light-exit axis.

Abstract: A light source module includes a first light source, a second light source, a first reflective layer and a second reflective layer. The first light source is configured to emit a first light having a first wavelength. The second light source is configured to emit a second light having the first wavelength. The first reflective layer is disposed opposite to the first light source and configured to reflect the first light. The second reflective layer is disposed opposite to the second light source and configured to reflect the second light. The first reflective layer and the second reflective layer are configured to reflect light of any wavelength in a visible spectrum.

Abstract: A projection device, including a light source module and a color wheel, is provided. The light source module includes a plurality of solid-state lighting sources driven by a DC drive power to sequentially provide a first light generated by a first number of light sources, a second light generated by a second number of light sources and a third light generated by a third number of light sources within a response cycle, wherein the number of light sources to be turn on is less than or equivalent to a total number of solid-state lighting sources. The color wheel has a first block, a second block and a third block, respectively corresponding to the first to third lights, so that the projection device sequentially outputs a first color light with a first brightness, a second color light with a second brightness and a third color light with a third brightness.

Abstract: The present disclosure provides a transducer for generating ultrasonic waves to detect an object and an ultrasonic probe using the same. The transducer includes a piezoelectric layer. The piezoelectric layer has a first surface and a second surface opposite to the first surface. The first surface is farther from the object than the second surface and includes a curved structure protruded along a first direction away from the object. The ultrasonic probe includes a handle component and a transducer. The transducer is arranged at one end of the handle component.

Abstract: A system and a method of changeable lens self-adaptive control and compensation are provided. The system includes a lens holder, an actuator, and a controller. The lens holder carries a plurality of types of lenses. The actuator is connected to the lens holder, and drives the lens holder to move. The controller is electrically connected to the actuator, and is configured to determine whether maximum predetermined output torsion of the actuator is incapable of driving the lens holder when the lens holder is at each of positions when controlling the actuator to drive the lens holder, and to build a lookup table corresponding to each of the positions. The controller is configured to record a position to be a broken point in the lookup table in response to the maximum predetermined output torsion being incapable of drive the lens holder when the lens holder is at the position.

Abstract: A switching device and a related method of switching working modes are applied to a display. The switching device includes a universal serial bus (USB) connector, a multiplexer, a USB hub and a controller. The USB connector is connected to a USB device or a voice control device. The multiplexer is electrically connected to the USB connector. The USB hub is electrically connected to the multiplexer and used to output a USB detection signal. The controller is electrically connected to the multiplexer and the USB hub, and used to output a reminder command. The controller determines whether the multiplexer actuates a USB channel for the USB connector or actuates a voice control channel for the voice control device in accordance with a response from at least one of the USB detection signal and the reminder command.