Abstract: A board adjuster is provided, including an adjusting member and a positioning member. The adjusting member includes a toggling portion and an insertion portion, the insertion portion has two restricting members extending oppositely, the toggling portion has two recessive portions, and the insertion portion is located between two recessive portions. The positioning member has a slot. The insertion portion is for being inserted into a gap between two boards, the positioning member is for abutting against and between the two boards and the toggling portion, the insertion portion is disposed through the slot, the positioning member is disposed through the two recessive portions, the positioning member abuts against the two recessive portions so that the two restricting members respectively abut against a side of one of the two boards away from the toggling portion.

Abstract: A board adjuster is provided, including an adjusting member and a positioning member. The adjusting member includes a toggling portion and an insertion portion, the insertion portion has two restricting members extending oppositely, the toggling portion has two recessive portions, and the insertion portion is located between two recessive portions. The positioning member has a slot. The insertion portion is for being inserted into a gap between two boards, the positioning member is for abutting against and between the two boards and the toggling portion, the insertion portion is disposed through the slot, the positioning member is disposed through the two recessive portions, the positioning member abuts against the two recessive portions so that the two restricting members respectively abut against a side of one of the two boards away from the toggling portion.

Abstract: A preheating device for endoscopy includes a flexible bag, a plurality of first welded joint, and a mark member. The flexible bag is disposed with a saturated sodium acetate solution and a trigger. The flexible bag includes a closed circumference around the outer periphery thereof. The closed circumference includes a longer side and a shorter side next to each other. The plurality of the first welded joint is arranged into a folding line along a longitudinal direction, wherein every two adjacent first welded joints of the folding line forms a flowing space. The folding line is substantially parallel to the longer side. The first welded joint nearest to the shorter side is the last first welded joint, and the mark member is disposed on the flexible bag between the last first welded joint and the shorter side. The mark member is used for indicating a placement of an endoscopy.

Abstract: An umbrella is provided with a frame including a shank, a handle at a lower end of the shank, a grommet at an upper end of the shank, a runner slidably disposed on the shank between the handle and the grommet, ribs radially extending from the grommet, and stretchers having two ends pivotably secured to the runner and an intermediate portion of the rib respectively; and a canopy assembly including a canopy secured in covering relation on the ribs, protection members each secured to an edge portion of an inner surface of the canopy adjacent to a tip of each rib, and rib tip protection elements each secured to both the protection member and the inner surface of the canopy. Each rib has an end releasably inserted into the rib tip protection element.

Abstract: A projection lens and a projection apparatus are provided. The projection lens has a screen side and an image side. The projection lens includes a first lens group, a second lens group, and a third lens group. The first lens group disposed between the screen side and the image side includes a first, a second, and a third lenses arranged sequentially from the screen side to the image side. The second lens group disposed between the first lens group and the image side includes a fourth, a fifth, a sixth, a seventh, an eighth, a ninth, and a tenth lenses arranged sequentially from the screen side to the image side. The third lens group disposed between the second lens group and the image side includes an eleventh and a twelfth lenses, and a distance between the twelfth lens and the light valve is a constant.

Abstract: A method for powering a load by a light source driving circuit is disclosed. The method includes: acquiring a first sensing signal indicative of an average current flowing through the load; generating a first temperature detecting signal indicative of an ambient temperature of the light source driving circuit; and adjusting the average current flowing through the load based on the first temperature detecting signal and the first sensing signal to make the average current flowing through the load to be inversely proportional to the ambient temperature of the light source driving circuit if the ambient temperature of the light source driving circuit is between a first temperature threshold and a second temperature threshold.

Abstract: A projection display apparatus includes a light source module, an optical engine module and a projection lens module. The optical engine module includes a prism and a light valve. The projection lens module includes a first lens group and a second lens group. The first lens group is disposed between the screen end and the imaging end. The first lens group includes a first lens, a second lens and a third lens, which are sequentially disposed from the screen end to the imaging end and have negative, negative and positive refractive powers, respectively. The second lens group is disposed between the first lens group and the imaging end and has a positive refractive power. The second lens group includes a fourth lens, a fifth lens and a sixth lens, which are sequentially disposed from the screen end to the imaging end and have negative, positive and positive refractive powers, respectively.

Abstract: A projection lens disposed between a screen side and an image side and including a first lens group and a second lens group is provided. Refractive powers of the first lens group and the second lens group are respectively negative and positive. The first lens group includes a first lens, a second lens, and a third lens arranged in sequence from the screen side to the image side, and refractive powers thereof are respectively negative, negative, and positive. The second lens group is disposed between the first lens group and the image side and includes a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens arranged in sequence from the screen side to the image side, and refractive powers thereof are respectively positive, positive, negative, negative, negative, positive, and positive. A projection apparatus is provided.

Abstract: A circuit for driving a light source includes a power converter coupled between a power source and the light source, and a controller coupled to the power converter. The power converter receives power from the power source and provides a regulated power to the light source. The controller receives a conduction status signal indicating a conduction state of a dimmer coupled between the power source and the power converter, and adjusts the brightness of the light source based on the conduction status signal. The controller also receives an operation indicating signal indicative of operation of an ON/OFF switch coupled to the dimmer, and adjusts color temperature of the light source based on the operation indicating signal.

Abstract: A semiconductor device including a substrate, a plurality of III-nitride semiconductor layers, a source electrode, a gate electrode, a drain electrode, and a doped layer. The III-nitride semiconductor layers are disposed on the substrate. A two dimensional electron gas (2DEG) channel is formed in the III-nitride semiconductor layers. The source electrode, the gate electrode, and the drain electrode are disposed on the III-nitride semiconductor layers. The gate electrode is located between the source electrode and the drain electrode. The source electrode and the drain electrode are electrically connected to the 2DEG channel. A lateral direction is defined from the source electrode to the drain electrode. The doped layer is disposed between the gate electrode and the III-nitride semiconductor layers. The doped layer includes a plurality of dopants, and a concentration of the dopants varies along the lateral direction.

Abstract: A cast equipment including a fixed element, a filling device with a first site fastened to the fixed element, and a pressure sensor attached to the filling device is disclosed in this application. The pressure sensor is able to detect and collect pressure data, and the fixed element has a first container and a shape-retaining moldable material inside the first container. The present application provides an equipment to detect a pressure data to a casted region. A method for using the cast equipment is also provided in this application.

Abstract: A zoom lens includes a first lens group and a second lens group. The first lens group has a negative refractive power and includes a first lens, a second lens, and a third lens arranged in sequence from a magnified side to a minified side, refractive powers of which are negative, negative, and positive, respectively. The second lens group has a positive refractive power and is disposed between the first lens group and the minified side. The second lens group includes a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens arranged in sequence from the magnified side to the minified side, refractive powers of which are positive, negative, positive, negative, positive, negative, and positive, respectively. The first lens and the tenth lens are aspheric lenses, and the second lens to the ninth lens are spherical lenses.

Abstract: A driving circuit includes an amplifier circuit, a control path, and a control circuit. The control path is coupled to the amplifier circuit. The control circuit is coupled to the control path. The control circuit receives a control signal and outputs a modulation signal to the control path according to the control signal.

Abstract: A zoom lens including first to seventh lens units arranged in this order from an object side to an image side is provided. The first to seventh lens units respectively have refractive powers of negative, positive, negative, positive, positive, negative. The first to seventh lens units are disposed along an optical axis of the zoom lens, and a distance between the seventh lens and the image side is fixed, and the first lens unit, the second lens unit, the third lens unit, the fourth lens unit, the fifth lens unit and the sixth lens unit are adapted to move along the optical axis between the object side and the image side.

Abstract: A zoom lens including first to seventh lens units arranged in this order from an object side to an image side is provided. The first to seventh lens units respectively have refractive powers of negative, positive, negative, positive, positive, negative. The first to seventh lens units are disposed along an optical axis of the zoom lens, and a distance between the seventh lens and the image side is fixed, and the first lens unit, the second lens unit, the third lens unit, the fourth lens unit, the fifth lens unit and the sixth lens unit are adapted to move along the optical axis between the object side and the image side.

Abstract: A switching power supply includes a power converter which includes a transformer and a switch, a current sensor, a switch controller and a compensation resistor. The current sensor is operable for generating a current monitoring signal indicating a current through a primary winding of the transformer. The switch controller is operable for receiving a feedback signal indicating an output voltage of the power converter, generating a driving signal based on the feedback signal to control an input power and an output power of the transformer, receiving a line voltage signal indicating an input voltage of the power converter, and generating a compensation current corresponding to a peak value of the line voltage signal. The compensation resistor is coupled between the current sensor and the switch controller. A voltage of the current monitoring signal is inversely proportional to the input voltage under control of the compensation current and the compensation resistor.

Abstract: A lamp tube with adjustable color temperature includes: a top housing, having the top end formed with a notch; a bottom housing, formed with a first recess and a second recess; a slide device, exposed at the notch and capable of sliding in the second recess; a light source module, disposed with a plurality of LED chips; a light filtering module, disposed with a plurality of light filtering sheets; and two end covers; when the slide device slides to a first location, the LED chips are enabled to emit lights with a first color temperature through the light filtering sheets; and when the slide device slides to a second location, the LED chips are enabled to emit lights with a second color temperature, thereby achieving an objective of adjusting the color temperature of the lamp tube. In addition, a lamp device with adjustable color temperature is also disclosed.

Abstract: A zoom lens including a first lens group and a second lens group is provided. The first lens group having a negative refractive power is disposed between an object side and an image side and includes a first lens having a negative refractive power. The second lens group having a positive refractive power is disposed between the first lens group and the image side and includes a second lens, a third lens, a fourth lens and a fifth lens arranged in sequence from the object side to the image side. Refractive powers of the second lens, the third lens, the fourth lens and the fifth lens are positive, positive, negative and positive in sequence, wherein the first lens has a surface facing the object side, a radius of curvature of the surface is R1, and |R1|>700 mm.