Abstract: A digital-to-analog converter is coupled to a first voltage source and used for converting a digital input into an analog output. The DAC includes a voltage booster providing a first gate-source voltage and a second gate-source voltage to generate a voltage of a first level according to the first voltage source and the first gate-source voltage, and to generate a voltage of a second level according to the voltage of the first level and the second gate-source voltage; and a current-guiding circuit selectively receiving the voltage of the first level or the second level according to the digital input to generate the analog output. The first level and the second level vary with the first voltage source.

Abstract: A digital-to-analog converter is coupled to a first voltage source and used for converting a digital input into an analog output. The DAC includes a voltage booster providing a first gate-source voltage and a second gate-source voltage to generate a voltage of a first level according to the first voltage source and the first gate-source voltage, and to generate a voltage of a second level according to the voltage of the first level and the second gate-source voltage; and a current-guiding circuit selectively receiving the voltage of the first level or the second level according to the digital input to generate the analog output. The first level and the second level vary with the first voltage source.

Abstract: A device to detect an iron's position includes a constant voltage regulator, a frequency pick up unit, an integrated circuitry chip, a sensor unit and a control unit. The frequency pick up unit is connected to the constant voltage regulator. The frequency pick up unit includes a resistor connected to a capacitor to retrieve the frequency signal of the input voltage. The integrated circuitry chip includes a frequency producer connected with a frequency identifier. The sensor unit includes a metal ball disposed on an arc track to control the signal input of the frequency pick up unit. The control unit is connected to the frequency identifier. The frequency identifier triggers a signal to change the working mode of a transistor of the control unit.

Abstract: The present invention provides a source driver used in an LCD, especially a big LCD, so that energy consumed can be saved together with small amplitude and reduced electromagnetic interference.

Abstract: The present invention is applied to a liquid crystal display (LCD) having a big size so that the LCD can be used with saved energy, small amplitude and low electromagnetic interference.

Abstract: A welding flux for use in welding stainless steel parts to increase welding penetration, consisting essentially a base material obtained from manganese peroxide (MnO2), and an activator selected from a material group that includes zinc oxide (ZnO), silicon dioxide (SiO2), chromium oxide (CrO2), titanium dioxide (TiO2), molybdenum dioxide (MoO2), and iron oxide (Fe2O2).

Abstract: A heat dissipation device for cooling an electronic device. The heat dissipation device comprises a fan, a controller connected to the fan and coupled to the electronic device and a sensor connected to the controller and sending a first signal to the controller by detecting a temperature variation in the electronic device. The electronic device sends a second signal to the controller, the controller changes the speed of the fan according to either the first signal or the second signal.

Abstract: A welding flux for use in welding stainless steel parts to increase welding penetration, consisting essentially a base material obtained from manganese peroxide (MnO2), and an activator selected from a material group that includes zinc oxide (ZnO), silicon dioxide (SiO2), chromium oxide (CrO2), titanium dioxide (TiO2), molybdenum dioxide (MoO2), and iron oxide (Fe2O2).

Abstract: A hinge for a cellular phone that has a cover and a base comprises an inner sleeve, an outer sleeve and a spring. The spring is mounted between the inner sleeve and the outer sleeve and provides a torsion force to open the cover. A layer of buffering gel is applied the outer surface of the inner sleeve between the inner sleeve and the outer sleeve to damp the opening rate of the cover so that the pivoting device can keep a wire between the cover and the base from breaking.

Abstract: A basketball game device includes a backboard to which a mount is attached for supporting a rim loop ring. A detector is mounted to an underside of the mount and transmits ultrasonic waves to a work space below the rim loop ring. The work space has an outer bound beyond distance of a remote edge of the rim loop ring. A valid distance within the remote edge of the rim loop ring is set in the detector. The detector repeatedly generates ultrasonic waves toward an object and detects the reflected signals representing a series of data corresponding to distances of the object. If the first data of the series of data indicates a distance shorter than the valid distance, the goal is considered legal and if the first data is a distance greater than the valid distance, the goal is illegal.

Abstract: A hinge for a cellular phone that has a cover and a base comprises an inner sleeve, an outer sleeve and a spring. The spring is mounted between the inner sleeve and the outer sleeve and provides a torsion force to open the cover. A layer of buffering gel is applied the outer surface of the inner sleeve between the inner sleeve and the outer sleeve to damp the opening rate of the cover so that the pivoting device can keep a wire between the cover and the base from breaking.

Abstract: An inductive score device comprises a casing, a cantilever, a resilient member, and a photoelectric element, wherein the cantilever is rotatable and normally held horizontally in the casing by taking advantage of the resilient member and a counterbalance mechanism, and is depressible downwardly by an external force and restorable by the resilient member every time the external force is removed. When the cantilever is moved downwardly, an interruption piece thereof will interrupt the light route of the photoelectric element to change the state thereof and trigger the score device to count automatically.

Abstract: A syringe device includes a core member received in the plunger and the core member is fixedly connected to a base member to which a needle cannula is connected. When the plunger is pulled, the base member is pulled into the barrel. Two flexible protrusions extend from the plunger and which expand wide when the plunger is pulled to a desired position. The expanded flexible protrusions limit the plunger from being pushed into the barrel again.

Abstract: A method and system may process messages in real time. The computer may analyze the received message in advance when receiving a message from the sender, which means the computer may determine whether or not the received message is the specific message which needs to be processed in real time. If the received message is specific, then, according to the setting reminding method, the system may utilize shaking of the mouse, sending out voice or light or displaying an image on the screen to remind the users. The users thus may respond to the message immediately, which may eliminate the delay of the important message.

Abstract: A high-pressure fluid hose connector capable of preventing scraping a hose during installation, has a connecting pipe having multiple teeth around the middle portion thereof and a locking sleeve having multiple notches defined thereon and corresponding to the teeth of the connecting pipe.

Abstract: A swing-practicing device for golf, comprises a first shaft, a second shaft, a third shaft, a fourth shaft, a fifth shaft and a ball mount. Those shafts and ball mount are pivotally connected by bolt and clamping holes thereon. Whereby user can find a precise standing point and the golf ball can be positioned at a precise position.

Abstract: A nesting bag comprises a 3-bag combination and a strap. The three bags of the combination are so dimensioned that they are slidably disposed within one another, leaving two suitable spaces between the bottoms of the inner and middle bags as well as between the bottoms of the middle and outer bags respectively. The spaces grow larger when and after the inner and middle bas are pulled upwards relative to the middle and outer bags respectively. U-shaped zippers are horizontally provided on the top and bottom of the inner bag and on the bottom of the middle bag. When these zippers are pulled closed, the three bags can be used separately and when they are pulled open, the three bags can be used as a single, larger unit, instead. A U-shaped zipper is vertically provided on one side of the outer bag for conveniently putting objects into and taking them out of the outer bag.

Abstract: An improved self-opening and self-closing umbrella including a canopy, a conventional self-opening and self-closing frame formed of ribs and a telescoping shaft, a handle and an auxiliary mechanism overcomes problems with a conventional self-opening and self-closing umbrella by means of the auxiliary mechanism which comprises a cylindrical tube fixed on the shaft, spring means provided over the shaft in the tube, a hollow push rod provided between the spring means and the handle, locking means provided between the shaft and the tube, two sleeves provided over the shaft and the tube respectively.The auxiliary mechanism serves to help the umbrella open quickly and fully, close to a condition where the umbrella folds tightly and stands ready for opening again, get its shaft strengthened and be used as a walking stick conveniently.

Abstract: An automatically opening and closing umbrella comprising a telescoping shaft having a middle tube, an outer tube slidably disposed over the middle tube, and two inner tubes longitudinally displaced and slidably disposed within the middle tube. Notches are provided at the top of the middle tube, the upper inner tube, and the outer tube. Between the two inner tubes is a first spring abutting against the ends thereof. A second spring is coaxially disposed over the middle tube between the notches of the middle tube and the outer tube. Locking members are provided to fix the position of the tubes, thus biasing the springs. When a first locking member is released, the first spring causes the umbrella to open. When a second locking member is released, the second spring causes the umbrella to close.