Abstract: A projection device configured to project an image in a projection direction is provided. The projection device includes a housing and a projection module. The housing has an air inlet and an air outlet, wherein the air inlet, the air outlet and the projection direction are in the same direction. The projection module is disposed inside the housing. The projection direction and a direction of gravity are in the same direction.

Abstract: A lamp clamp used to fix a light source on an object is disclosed. The lamp clamp includes a first clamping member and a second clamping member. The first clamping member includes a lamp fixing portion, a connecting portion and a stopping portion. The lamp fixing portion is used to fix the light source. The connecting portion is connected to the lamp fixing portion. The stopping portion is movably connected to the connecting portion and has a stopping surface selectively disposed at one of plural positions on the connecting portion. The second clamping member is connected to the connecting portion to clamp the object between the stopping surface and the second clamping member.

Abstract: A light source module including first and second light sources, first and second wavelength conversion units, first and second light-splitting units is provided. The first light source emits a first light having a first wavelength. The first wavelength conversion unit converts at least one portion of the first light into a first converted light having a second wavelength. The second light-splitting unit allows the light having the first wavelength to travel through and reflects the light having the second wavelength. The second light source emits a second light having the first wavelength. The second wavelength conversion unit converts at least one portion of the second light into a second converted light having the second wavelength. The first light-splitting unit disposed between the first and the second wavelength conversion units reflects the light having the first wavelength and allow the light having the second wavelength to travel through.

Abstract: A light source module including first and second light sources, first and second wavelength conversion units, and first and second light splitting units is provided. The first light source emits a first light having a first wavelength. The first wavelength conversion unit converts at least one portion of the first light into a first converted light having a second wavelength. The second light splitting unit allows the lights having the second and third wavelengths to travel through and reflects the light having the first wavelength. The second light source emits a second light having the first wavelength. The second wavelength conversion unit converts at least one portion of the second light into a second converted light having the third wavelength. The first light splitting unit is disposed between the first and second wavelength conversion units and reflects the first wavelength and allows the second wavelength to travel through.

Abstract: A display device includes a luminescent array and a column driver. The cathodes of the first row of luminescent devices are coupled to a first word line. The anodes of the second row of luminescent devices are coupled to a second word line. In the mth column of luminescent devices, the anode of a first luminescent device in the first row is coupled to the cathode of a second luminescent device in the second row. The column driver includes a switch and two multiplexers. The switch controls the path between input signal and the mth column of luminescent devices. The first multiplexer provides a first driving signal for charging the parasite capacitor in the switch and the first luminescent device during a first period. The second multiplexer provides a second driving signal for charging the second luminescent device and discharging the parasite capacitor in the switch during a second period.

Abstract: A display device includes a first luminescent device, a second luminescent device, a multi-color strobe decoder, a pseudo signal circuit and a single-color driving circuit. The multi-color strobe decoder is configured to generate two gate control signals. The second luminescent device and the pseudo signal circuit are coupled to the multi-color strobe decoder. The single-color driving circuit is coupled to the first luminescent device and the multi-color strobe decoder. When the single-color driving circuit provides first current for driving the first luminescent device according to the first gate control signal and/or a brightness enhancing signal, the pseudo signal circuit is configured to couple a first bias voltage to the multi-color strobe decoder according to the first gate control signal. When the second gate control signal drives the second luminescent device, the second luminescent device is configure to couple a second bias voltage to the multi-color strobe decoder.

Abstract: A projector including a light source, a first prism, a second prism and a digital micro-mirror device (DMD) is provided. The light source emits light. The first prism includes a first surface, a second surface and a third surface which are connected to each other around the perimeter thereof, and the illumination light enters the first prism through the first surface. The second prism has a fourth surface and a fifth surface which are connected to each other, and the fourth surface faces the second surface of the first prism. The DMD faces the third surface. The illumination light sequentially passes through the first surface, is reflected by the second surface, passes through the third surface, and reaches the DMD. The DMD converts the illumination light into image light, and the image light sequentially passes through the third surface, the second surface, the fourth surface and the fifth surface.

Abstract: The present invention discloses an oral scanner, including an outer casing, a reflector, a heat source, an optical module and a forced convection element. The outer casing has a cavity. The reflector is located at the front end of the cavity. The heat source is located in the outer casing. The optical module is located in the casing. A heat channel is formed between the optical module and the outer casing. The forced convection element is disposed in the heat channel and configured to forcedly dissipate the waste heat of the heat source to the cavity to heat the reflector. Thus, the temperature of the heat source can be reduced, and vapor will not be generated on the reflector heated by the waste heat.

Abstract: An operation method of a backlight module is disclosed. The operation method includes: determining whether a first video synchronization signal is received; in response to a determination that the first video synchronization signal is received, activating a counter, and controlling the backlight module to emit light a specific number of times at a first brightness for a first time period; determining whether the counter is timeout and a second video synchronization signal is not received; and in response to a determination that the counter is timeout and the second video synchronization signal is not received, controlling the backlight module to switch between lighting and not lighting multiple times within a second time period.

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: An underwater ultrasonic device is provided. The underwater ultrasonic device comprises: a setting area, wherein the setting area comprises a plurality of setting intervals in sequence, and a plurality of ultrasonic devices arranged in order along the setting area respectively corresponding to the setting intervals, wherein each of the ultrasonic devices has a signal opening angle, and the signal opening angle is greater than the arc angle of the arc interval corresponding to the ultrasonic device.

Abstract: An electronic device using near field communication is provided. The electronic device using near field communication includes a coil element, a display module, an antenna element and a switch element. The display module includes a panel. The antenna element is configured to transmit and receive a near field communication signal. The coil element, the display module and the antenna element are stacked. The coil element and the antenna element are at least partially overlapped. The switch element is connected to the coil element. The switch element is configured to switch the coil element into an open-loop state or a closed-loop state.

Abstract: A light source driving method is applied to a light source driving module electrically connected to a light source and a controller. The light source driving module includes a frequency setting module, a driving circuit, and a conversion module. The frequency setting module generates a frequency setting signal according to a switching signal. The driving circuit generates a light source driving signal after receiving the switching signal and a current control signal. The conversion module selectively generates a driving current flowing through the light source in response to the light source driving signal. The driving current increases continuously during a rising duration, and the light source driving signal has a first operating frequency during the rising period. The driving current remains unchanged during a stable duration, and the light source driving signal has a second operating frequency during the stable period.

Abstract: A display device includes a storage unit, a display unit and a processing unit. The storage unit stores a color parameter under a color space. The display unit displays an adjusting interface including a reference color block and a plurality of offset color blocks. When a target offset color block of the offset color blocks is selected, the processing unit updates a color coordinate of the reference color block by a color coordinate of the target offset color block and updates a color coordinate of each of the offset color blocks by a color coordinate of the updated reference color block and an offset value. The processing unit obtains a color transformation matrix according to the color coordinate of the reference color block, the color coordinate of the target offset color block and the color parameter. The processing unit adjusts three output percentages of RGB by the color transformation matrix.

Abstract: A lens fixing module is configured to fix a lens, wherein the lens has a flange. The lens fixing module includes a fixing base and a fixing ring. The fixing base has a hollow pillar and a first connecting portion. The fixing ring has a restraining portion and a second connecting portion. An end of the lens is inserted into the hollow pillar, the fixing ring is disposed on the lens and the hollow pillar, and the first connecting portion is connected to the second connecting portion, such that the flange is sandwiched in between the restraining portion and the hollow pillar.

Abstract: A light source module includes a ring light guide, at least one light source, a reflector, and a diffuser. The ring light guide includes a ring body and at least one light incident portion. The ring light guide has a light exit surface and a bottom surface, which are two opposite ring surfaces of the ring body. The ring body has a plurality of optical structures disposed along the ring body. The at least one light incident portion is disposed on the ring body and protrudes from a lateral side of the ring body. The light incident portion has a light incident surface, wherein a plane where the light incident surface lies crosses a plane where the light exit surface lies.

Abstract: A low-gloss metal plate includes a metal body and a plurality of metal pattern units. The metal body has a first surface and a second surface opposite to each other. The plurality of metal pattern units protrude from the first surface and are arranged to form a regular pattern. One of the plurality of metal pattern units has a top, a base and a sidewall. The base at least partially overlaps with the first surface. The sidewall connects the top with the base and forms an angle less than 60° with the base.

Abstract: An underwater ultrasonic device is disclosed. The underwater ultrasonic device comprises a body and an ultrasonic transducer. The ultrasonic transducer has a curved interface having a first side and an adjacent second side for transmitting and receiving a plurality of ultrasonic signals, and the first side has a first curve and the second side has a second curve, wherein the first curve and the second curve has different curvatures. Therefore, the underwater ultrasonic device can achieve the purpose of underwater wide-angle measurement with increased sensitivity and transmission capability.

Abstract: An intraoral scanner includes a casing, a light source disposed in the casing, a reflection plate obliquely disposed in the casing for reflecting light of the light source to an object to be scanned through an opening of the casing, a transparent plate, and a receiver adjacent to the light source. A projection optical axis of the light source forms a first oblique angle with a receiving optical axis of the receiver. The receiver receives light after being incident to the object to be scanned and then reflected to the receiver by the reflection plate. The transparent plate is disposed between the light source and the reflection plate or covers the opening. The projection optical axis forms a second oblique angle with a norm of the transparent plate to make a reflection angle range of light reflected by the transparent plate fall outside a receiving angel range of the receiver.

Abstract: An illumination device selectively disposed on an object having a first side and a second side is provided. The illumination device comprises a light-emitting module, a camera unit and a rotation mechanism. The lighting direction of the light-emitting module points towards the front of the first side. The central filming direction of the camera unit points towards the front of the first side. The light-emitting module is coupled to the rotation mechanism such that the light-emitting module is capable of rotating about an axis of the rotation mechanism. When the lighting direction falls in a first angular range relative to the axis of the rotation mechanism, the light-emitting module provides a first mode illumination. When the lighting direction falls in a second angular range relative to the axis of the rotation mechanism, the light-emitting module provides a second mode illumination. Said first angular range is different from said second angular range.