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 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 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 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: 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 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.

Abstract: A color correction system and a colorimeter positioning method therefore are provided. A first color block is displayed in a first display area of a display. During the period of displaying the first color block, a first sensing value is acquired for the first color block through a sensor of a colorimeter. The first sensing value is compared with a first reference value to determine whether the first sensing value meets the first specific condition. In response to the first sensing value meeting the first specific condition, a second color block is displayed in the first display area of the display. During the period of displaying the second color block, a second sensing value is acquired for the second color block through the sensor. The second sensing value is compared with a second reference value to determine whether the second sensing value meets the second specific condition.

Abstract: A power supply circuit includes a voltage conversion circuit, a signal path, a connector, and a feedback path. The voltage conversion circuit receives and converts an input voltage into an output voltage. A voltage drop is generated when the output voltage flows through the signal path. The connector is coupled to the voltage conversion circuit through the signal path, wherein the output voltage flows through the signal path then enters the connector as a connector voltage, which supplies power to an external device when the external device is connected to the connector. The feedback path is coupled to the voltage conversion circuit and the connector, wherein the connector voltage is fed back to the voltage conversion circuit as an induced voltage through the feedback path, and the voltage conversion circuit adjusts the output voltage according to the induced voltage.

Abstract: An illumination system including a first light-emitting unit, a first reflector, a second light-emitting unit, and a second reflector is provided. The first light-emitting unit is configured to emit a first light beam, and the first reflector is configured to reflect the first light beam toward a first direction. The second light-emitting unit is configured to emit a second light beam, and the second reflector is configured to reflect the second light beam toward the first direction. The first reflector and the second reflector are arranged in a second direction. For a view seeing along the second direction, the first reflector and the second reflector form a cross shape. The second direction is perpendicular to the first direction. A projection apparatus is also provided.

Abstract: A display device and a signal source switching method therefore are provided. The display device is connected with a first signal source device and a second signal source device and includes a switching circuit, a receiver circuit and a control circuit. The switching circuit includes a first connection port and a second connection port, which are respectively connected to the first signal source device and the second signal source device. When the control circuit receives a signal source switching command, the control circuit records a current operating state of each of the first signal source device and the second signal source device. When the control circuit receives an active source command from the first signal source device, the control circuit refers to the current operating state to control the switching circuit to switch the image signal source to the first signal source device or the second signal source device.

Abstract: An electronic device having a function of automatically switching operation modes includes a circuit board, a first case, a second case, and a connector. The second case is assembled with the first case to form an accommodating space. The circuit board is disposed inside the accommodating space. The connector is disposed on the first case and applied for the circuit board. The connector can include a first contacting portion and a second contacting portion. The second contacting portion is equipped with the first contacting portion. The first contacting portion is pressed by the second case and drive deformation of the second contacting portion, and the second contacting portion contacts the circuit board to keep in a first operation mode. When the second case is removed from the first case, the second contacting portion is resiliently recovered and the circuit board is switched to a second operation mode.

Abstract: A light source module includes a first light source and a second light source. The first light source is configured for emitting a first light having a first wavelength, and the first light includes a first part and a second part. The second light source is configured for emitting a second light having a second wavelength. The second light source includes a first wavelength conversion layer, and the first wavelength conversion layer is configured for converting the first light into the second light. One of the first part and the second part is incident to the first wavelength conversion layer, and the other of the first part and the second part is not incident to the first wavelength conversion layer.

Abstract: A display including a screen, a bracket, a hanging element and a fixing element is provided. The support is connected to the screen and has a top end and a bottom end. The hanging element is disposed on the top end. The fixing element is disposed at the bottom end. When the hanging element is hung on an upper edge of a plate, the fixing element is fixed on a surface of the plate.

Abstract: A multicolor light mixing module includes a light-dividing unit, a light-homogenizing member, a first laser set including first and second lighting units in a sequential arrangement, a light-mixing unit obliquely opposite to the light-dividing unit for guiding a first color light of the first lighting unit and a second color light of the second lighting unit along first and second light-mixing axes to form first and second laser beams, and a condensing lens. The light-dividing unit is obliquely opposite to the first laser set to allow partial transmission and partial reflection of the first and second color lights, for guiding the first and second color lights along first and second light-dividing axes. The light-homogenizing member is disposed on the first and second light-mixing axes for homogenizing the first and second laser beams. The condensing lens between the light-homogenizing member and the light-mixing unit condenses the first and second laser beams.

Abstract: A display device and a display method thereof are provided. A sensing module senses at least one state parameter of a display unit. A control circuit stores a plurality of overdrive characteristic lookup tables, selects and calculates an overdrive lookup table according to an overdrive characteristic corresponding to the at least one state parameter and a working parameter of the display unit, and controls the display unit to display according to the overdrive lookup table.