Abstract: A precharge method for a data driver includes steps of: outputting a display data to a plurality of output terminals of the data driver; outputting a second precharge voltage to an output terminal among the plurality of output terminals prior to outputting the display data to the output terminal, to precharge the output terminal to a voltage level closer to an output voltage; and outputting a first precharge voltage to the output terminal prior to outputting the second precharge voltage. The first precharge voltage provides a faster voltage transition on the output terminal than the second precharge voltage.

Abstract: A pliers includes a first body with an engaging groove and a second body with an elongated slot pivotally connected with each other. The elongated slot includes a left and right positioning grooves and a protruding portion disposed therebetween. A tap button is pivotally connected to the second body. A supporting member is disposed between the second body and the tap button. When the first body comes close to the second body, the tap button can be tapped to a first position and engaged in the engaging groove. Thus, the first body is blocked and cannot pivot relative to the second body. The tap button can be tapped to a second position and detached from the engaging groove. Thus, the first body is pivotable relative to the second body. A positioning block is extending from the tap button and can be engaged in any of the positioning grooves for positioning the tap button.

Abstract: A pliers has guiding surfaces at tooth portions of the first pliers body and tooth portions of the engaging unit of the control member. Therefore, when the pressing block of the control member is not pressed, even if the first pliers body is engaged with the tooth portions of the engaging unit, the second pliers body can still be pushed forward relative to the first pliers body, so that the second guiding surfaces of the second tooth portions of the engaging unit slide relative to the first guiding surfaces of the first tooth portions and each of the first tooth portions is moved to engage with a next corresponding second tooth portion, thereby allowing the second pliers portion being movable toward the first pliers portion. Hence, the clamping distance of the pliers can be adjusted to match with an object to be clamped.

Abstract: A pliers includes a first body with an engaging groove and a second body with an elongated slot pivotally connected with each other. The elongated slot includes a left and right positioning grooves and a protruding portion disposed therebetween. A tap button is pivotally connected to the second body. A supporting member is disposed between the second body and the tap button. When the first body comes close to the second body, the tap button can be tapped to a first position and engaged in the engaging groove. Thus, the first body is blocked and cannot pivot relative to the second body. The tap button can be tapped to a second position and detached from the engaging groove. Thus, the first body is pivotable relative to the second body. A positioning block is extending from the tap button and can be engaged in any of the positioning grooves for positioning the tap button.

Abstract: Snap ring pliers include two levers, two posts, and two protruding blocks. The two levers are pivotally connected to each other and relatively pivotable. The two levers each have a control end at a distal end thereof. The two posts are fixed to the control ends of the two levers, respectively. The posts each have a complete surface without a notch. The posts each have a non-circular cross-section and at least one an arris for leaning against a perforation of a snap ring. The two protruding blocks are respectively fixed to distal ends of the two posts for restraining the snap ring from being separated from the posts, thereby controlling the snap ring stably.

Abstract: A pliers includes a first body including an engaging groove, a second body, and a tap-button mechanism. The second body is pivoted with the first body, and the first body is pivotable relative to the second body. The tap-button mechanism includes two positioning grooves at the second body and a tap button pivoted on the second body. When the first body comes close to the second body, the tap button can be tapped to a first position and engaged in the engaging groove. Thus, the first body is blocked and cannot pivot relative to the second body. The tap button can be tapped to a second position and detached from the engaging groove. Thus, the first body is pivotable relative to the second body. A positioning block is extending from the tap button and can be engaged in any of the positioning grooves for positioning the tap button.

Abstract: A pliers has guiding surfaces at tooth portions of the first pliers body and tooth portions of the engaging unit of the control member. Therefore, when the pressing block of the control member is not pressed, even if the first pliers body is engaged with the tooth portions of the engaging unit, the second pliers body can still be pushed forward relative to the first pliers body, so that the second guiding surfaces of the second tooth portions of the engaging unit slide relative to the first guiding surfaces of the first tooth portions and each of the first tooth portions is moved to engage with a next corresponding second tooth portion, thereby allowing the second pliers portion being movable toward the first pliers portion. Hence, the clamping distance of the pliers can be adjusted to match with an object to be clamped.

Abstract: A pliers includes a first body including an engaging groove, a second body, and a tap-button mechanism. The second body is pivoted with the first body, and the first body is pivotable relative to the second body. The tap-button mechanism includes two positioning grooves at the second body and a tap button pivoted on the second body. When the first body comes close to the second body, the tap button can be tapped to a first position and engaged in the engaging groove. Thus, the first body is blocked and cannot pivot relative to the second body. The tap button can be tapped to a second position and detached from the engaging groove. Thus, the first body is pivotable relative to the second body. A positioning block is extending from the tap button and can be engaged in any of the positioning grooves for positioning the tap button.

Abstract: A pliers has guiding surfaces at tooth portions of the first pliers body and tooth portions of the engaging unit of the control member. Therefore, when the pressing block of the control member is not pressed, even if the first pliers body is engaged with the tooth portions of the engaging unit, the second pliers body can still be pushed forward relative to the first pliers body, so that the second guiding surfaces of the second tooth portions of the engaging unit slide relative to the first guiding surfaces of the first tooth portions and each of the first tooth portions is moved to engage with a next corresponding second tooth portion, thereby allowing the second pliers portion being movable toward the first pliers portion. Hence, the clamping distance of the pliers can be adjusted to match with an object to be clamped.

Abstract: A water pipe wrench structure consisting of a first wrench body and a second wrench body pin jointed by a control component. The first wrench body includes an actuating piece. A tooth space is positioned on this actuating piece. This actuating piece and a tooth piece extend with a uniform curvature. The second wrench body includes a perforation to pass the control component through this perforation and the tooth space. This control component includes a column piece and a grinding tooth piece, and the grinding tooth piece can be moved by pressure, so that the grinding tooth piece can be engaged to or separated from the tooth space and thus end the movement of the control component.

Abstract: A water pipe wrench structure consisting of a first wrench body and a second wrench body pin jointed by a control component. The first wrench body includes an actuating piece. A tooth space is positioned on this actuating piece. This actuating piece and a tooth piece extend with a uniform curvature. The second wrench body includes a perforation to pass the control component through this perforation and the tooth space. This control component includes a column piece and a grinding tooth piece, and the grinding tooth piece can be moved by pressure, so that the grinding tooth piece can be engaged to or separated from the tooth space and thus end the movement of the control component.

Abstract: A switch circuit is provided. The switch circuit may include a first transistor having a source terminal to accept an input signal, a drain terminal to provide an output signal, and a gate; a power supply providing a gate voltage. The switch circuit may also include a circuit to couple a switch signal to the gate, wherein the circuit turns the first transistor ‘off’ for all values of the input signal when the switch signal is ‘low.’ A programmable gain amplifier (PGA) is also provided. The PGA may include an input stage having an input node to couple an input signal, and an output node to provide a gate signal, at least a first gain stage including a resistor and a switch circuit as above. A differential gain amplifier may be included to provide an output signal from the gain signal.

Abstract: Pliers with a restoring function include an elastic element and two pliers bodies. The elastic element has two urging ends. The two pliers bodies have two pinching heads, two handles, and two pivotal parts. Each of the pivotal parts has a recess and a pivotal hole. A pivotal element goes through the two pivotal holes. The elastic element is disposed in the two recesses and penetrated by the pivotal element. Both urging ends of the elastic element are on opposite sides of the two recesses to urge sidewalls of the recesses, thereby opening the pliers. A buffer region is designed in each of the recesses for the corresponding urging end. When the opening angle of the pliers is greater than that is supported by the elastic element, at least one urging end of the elastic element releases its urging against the recess sidewall and moves in the buffer region. The pliers become relaxed then.

Abstract: The circuit board with a heat dissipating structure is provided. A first grounding conductor layer is formed on a first surface of a substrate. A first insulting layer is formed on the first grounding conductor layer and defines a number of circuit element pin openings and a plurality of heat dissipating openings therein so that the first grounding conductor layer is exposed from the circuit element pin openings and the heat dissipating openings. A number of solder balls are disposed in the circuit element pin openings and contacted with the first grounding conductor layer. A number of heat dissipating structures are disposed in the heat dissipating openings and contacted with the first grounding conductor layer. The heat dissipating structures and the solder balls have an identical material. The method for manufacturing the circuit board is also provided.

Abstract: A high purity aqueous solution of hydroxylamine product is prepared by treating an aqueous solution of hydroxylammonium salt with a base like ammonia at low temperatures. A novel process can be carried out by separating the ammonium salt side product from hydroxylamine with a low temperature filtration and a resin-exchange process. The concentration of the hydroxylamine product is further improved by a safe distillation process that produces a high purity and high concentration hydroxylamine product with reduced risks of explosion.

Abstract: A tool structure composed of two pivotally connected handles and a tool head. The handle pivot shaft of the handles is spaced from the head pivot shaft of the tool head by a certain distance to form a double-lever structure for saving strength. A pin member is fitted through each handle in parallel to the handle pivot shaft, whereby the pin members can be forced to axially move within the handles. Each pin member has a large diameter section and a small diameter section. When replacing the tool head, a user only needs to press the pin members of the handles with a hand. At this time, the large diameter sections of the pin members are detached from the insertion notches of the tool head to easily replace the tool head with another tool head with different usage. The replacement can be completed without using any tool. Therefore, the tool head can be quickly assembled with the handles.

Abstract: A high purity aqueous solution of hydroxylamine product is prepared by treating an aqueous solution of hydroxylammonium salt with a base like ammonia at low temperatures. A novel process can be carried out by separating the ammonium salt side product from hydroxylamine with a low temperature filtration and a resin-exchange process. The concentration of the hydroxylamine product is further improved by a safe distillation process that produces a high purity and high concentration hydroxylamine product with reduced risks of explosion.