Abstract:
A uniform luminance light-emitting diode (LED) circuit board includes a first primary trace and a second primary trace mounted on a substrate along a direction and are spaced apart, multiple LED strings mounted on the substrate along the direction and parallelly connected between the first primary trace and the second primary trace, a first power trace and a second power trace respectively connected to the first primary trace and the second primary trace, and a first auxiliary trace with two ends respectively connected to the second primary trace and the second power trace. By adjusting trace widths of the first primary trace and the second primary trace to limit current passing through each LED string and using the first auxiliary trace to provide an additional current path, identical current flowing through all the LED strings results in uniform luminance of the LED strings.
Abstract:
Disclosed is a method of manufacturing an optical film, in which a transparent cycloolefin copolymer (COC) material is used as a raw material thereof and solved in a solvent to constitute a solution for forming the optical film. The thus formed optical film may have optical characteristics similar to those of prior-art optical film. Therefore, a retardation film or a protective film may be manufactured using cheaper and more accessible raw materials.
Abstract:
A circuit board of a parallel light-emitting circuit of parallel LED light-emitting device has an electrical insulation board, two wire patterns and at least two power wires. The two wire patterns are oppositely formed on the electrical insulation board. Each wire pattern is connected to the corresponding power wire and has a matrix main loop having closed loops and a plurality of sub-wires formed inside the corresponding closed loop. A plurality of LEDs are respectively mounted on the corresponding closed loop and electrically connect with the two sub-wires of the two wire patterns. When a DC power supply is inputted to the power wires, a current of the DC power supply uniformly flows through the matrix main loop and the sub-wires, so that the LEDs electrically connected to the corresponding sub-wires receive approximately equal current to further emit light with uniform brightness.
Abstract:
The present invention describes an integrated image detecting apparatus with low noise, which transforms optical current to voltage and comprises an optical detecting element, an integrated circuit, a correlated double sampling circuit, and an output circuit. The present invention is a CMOS process and is designed for different CMOS image application systems, which keeps the advantages of low power consumption and better integration. Shifts of circuit characteristics caused by process variation are furthermore eliminated.
Abstract:
A board-mounted parallel circuit structure with efficient power utilization includes a first substrate, a first constant voltage layer and a second constant voltage layer. The first and second constant voltage layers are connected to a power supply respectively through two power connection points. The first constant voltage layer has at least one insulating zone. Each insulating zone has a light-emitting unit formed therein. One electrode of the light-emitting unit is connected to the first constant voltage layer, and the other electrode thereof is connected to the second constant voltage layer through a conducting wire. When the power supply outputs a low voltage to the first constant voltage layer, resistance values everywhere on the first constant voltage layer are identical. Accordingly, given any distance between a light-emitting unit and a corresponding power connection point, lighting efficiency of the light-emitting unit is not affected and effective power utilization can be ensured.
Abstract:
A circuit board of a parallel light-emitting circuit of parallel LED light-emitting device has an electrical insulation board, two wire patterns and at least two power wires. The two wire patterns are oppositely formed on the electrical insulation board. Each wire pattern is connected to the corresponding power wire and has a matrix main loop having closed loops and a plurality of sub-wires formed inside the corresponding closed loop. A plurality of LEDs are respectively mounted on the corresponding closed loop and electrically connect with the two sub-wires of the two wire patterns. When a DC power supply is inputted to the power wires, a current of the DC power supply uniformly flows through the matrix main loop and the sub-wires, so that the LEDs electrically connected to the corresponding sub-wires receive approximately equal current to further emit light with uniform brightness.
Abstract:
A circuit board of a parallel light-emitting circuit of parallel LED light-emitting device has an electrical insulation board, two wire patterns and at least two power wires. The two wire patterns are oppositely formed on the electrical insulation board. Each wire pattern is connected to the corresponding power wire and has a matrix main loop having closed loops and a plurality of sub-wires formed inside the corresponding closed loop. A plurality of LEDs are respectively mounted on the corresponding closed loop and electrically connect with the two sub-wires of the two wire patterns. When a DC power supply is inputted to the power wires, a current of the DC power supply uniformly flows through the matrix main loop and the sub-wires, so that the LEDs electrically connected to the corresponding sub-wires receive approximately equal current to further emit light with uniform brightness.
Abstract:
A supporting structure comprises a base, a moveable unit and a first fine-tuning unit. The base comprises a body, a shaft, a first pivoting portion and a first groove, wherein the first pivoting portion and the first groove are disposed on the body. The moveable unit comprises a second pivoting portion and a positioning element, wherein the shaft passes the first and second pivoting portions to connect the moveable unit and the base, and the positioning element passes the first groove to position the moveable unit on the base. The first fine-tuning unit connects the base and the moveable unit, wherein the first fine-tuning unit rotates the moveable unit relative to the base.
Abstract:
The present invention provides a package structure with lead-frame on stacked chips, comprising: a lead-frame, composed of a plurality of outer leads arranged in rows facing each other and a plurality of inner leads arranged in rows facing each other formed by a plurality of wires, wherein the plurality of inner leads are divided into first inner leads and second inner leads, and the length of the first inner leads is greater than that of the second inner leads; and a plurality of semiconductor chip devices. The active surface of each chip faces upward and chips are misaligned to form offset stacked structure, wherein the semiconductor chip device stacked uppermost is fixedly connected under said first inner leads, and the plurality of semiconductor chip devices are electrically connected to the first inner leads and the second inner leads on the same side edge.
Abstract:
A method for manufacturing a tool handle includes preparing a handle member having one or more projections, attaching a panel onto the projection of the handle member, attaching a covering onto the panel and the projection, the covering includes a peripheral flange. An outer sleeve is then molded onto the handle member, and is engaged with the peripheral flange of the covering, to retain the covering and the panel to the handle member. A peripheral groove may be formed on the handle member and around the projection, to receive the peripheral flange of the covering. A concave chamber may be formed in the covering, to receive the panel and the projection of the handle member.