59results about How to "Reduce impedance difference" patented technology

According to some embodiments of the present invention, an impedance transformation circuit is provided for use with a transmitter, a receiver, and an antenna. The transmitter may provide transmission signals for transmission by the antenna. The antenna may provide received signals having an associated signal parameter to the receiver. The impedance transformation circuit includes an impedance adjusting circuit and a controller. The impedance adjusting circuit is connected between the antenna, the receiver, and the transmitter. The impedance adjusting circuit is configured to change an impedance difference presented between at least one of: 1) the transmitter and the antenna, and 2) the antenna and the receiver, in response to a control signal. The controller generates the control signal to change the presented impedance difference in response to a signal parameter.

The invention discloses a display panel assembly and an adjusting method thereof, and a display device. The display panel assembly comprises a display panel, a drive circuit and a control circuit. Display panel is provided with a display area and a fan-out area. The display area is provided with multiple first data lines. The fan-out area is provided with multiple second data lines with various lengths, and the multiple second data lines are connected with the first data lines. The drive circuit comprises a functional circuit and an adjustable resistor set which is connected with the output end of the functional circuit. The second data lines are coupled with the output end of the functional circuit via the adjustable resistor set which is used for reducing impedance difference of connection lines from the output end of the functional circuit to the first data lines. The control circuit is used for controlling resistance of the adjustable resistor set. Therefore, a situation of oversized signal delay difference among all the connection lines can be avoided, and thus excellent display of the display panel with uniform color and brightness can be realized.

The embodiment of the invention provides an array substrate, a display panel and a display device. The array substrate comprises a substrate; multiple grid lines, multiple data lines and multiple touch routing lines are arranged in a display region of the substrate; multiple first fan-out routing lines and multiple second fan-out routing lines are arranged in a fan-out region of the substrate and electrically connected with signal lines of the display region; any kind of signal lines comprises the first kind of signal lines and the second kind of signal lines, at least part of the first kind of signal lines is electrically connected with the first fan-out routing lines, and at least part of the second kind of signal lines is electrically connected with the second fan-out routing lines; the first fan-out routing lines comprise first fan-out routing line sections, the first fan-out routing line sections and the data lines are arranged on the same layers and made of the same materials, the second fan-out routing lines comprise second fan-out routing line sections, and the second fan-out routing line sections and the touch routing lines are arranged on the same layers and made of the same materials. The difference between the impedance of the fan-out region and the impedance between the fan-out routing lines is reduced, and the display quality is improved.

The invention discloses a display panel and device. The display panel comprises a plurality of signal lines in a display area and a driver chip which is located in a peripheral area at one ends of the signal lines. The output ends of the driver chip are correspondingly connected with the signal lines through leads one to one. Each lead comprises two metal segments arranged in different layers, and the line width of the first metal segment is larger than that of the second metal segment. In this way, each lead between the driver chip and the corresponding signal line is set as the two metal segments arranged in different layers, that is the driver chip is connected with the signal lines through double-layer lines, so that the display panel can be provided with a narrow bezel. Besides, when the line width of the first metal segment is larger than that of the second metal segment, teh impedance difference between the double-layer lines can be reduced, and the display effect of the display panel is improved.

The embodiment of the invention discloses an array substrate and a display panel. The array substrate comprises a display area and a non-display area. The non-display area is provided with a plurality of connecting leads, the connecting leads comprise a plurality of first connecting lead bodies, the first connecting lead bodies comprise first metal wirings, second metal wirings and third metal wirings, and at least two metal wirings of the first metal wirings, the second metal wirings and the third metal wirings are located on different film layers. By means of the array substrate and the display panel in the embodiment, the signal transmission uniformity in the different connecting leads is improved, and the display panel is even in display.

A liquid crystal display panel and a method for manufacturing the same are disclosed. The liquid crystal display panel comprises a data driving module; data lines arranged in an active area in parallel with one another; and data wirings arranged in a fanout area, one end of each data wiring being connected with an output end of said data driving module, the other end thereof being connected with a data line of said active area, wherein the data lines in said active area are arranged to have different widths.

The invention provides an array substrate, a liquid crystal display panel and a liquid crystal display device. The array substrate comprises a display area and a plurality of drive chips, wherein the display area is formed by a plurality of data lines and a plurality of scanning lines in a staggered mode, and the drive chips are used for providing data signals for the data lines and providing scanning signals for the scanning lines and connected with the data lines and the scanning lines through wires. Conductive layers are arranged on the wires in the preset area, wherein the preset area is an area where the lengths of the wires are larger than a preset value. According to the array substrate, the liquid crystal display panel and the liquid crystal display device, the conductive layers are arranged on the wires with larger lengths, and therefore impedance differences between the wires are reduced, and the display effect is improved.

A circuit board is provided for improving signal quality, including a signal plane for a plurality of signal traces arranged thereon and a ground plane formed by a plurality of tiles connected to each other in an array. Each tile is formed by ground traces. Different line segments of a signal trace mapped on the ground plane cross ground traces of the tiles at similar angles, thereby minimizing interaction between the ground traces and the signal traces to reduce differences in impedances of the signal traces.

A flexible wiring board including a base, at least one cover, a signal conductor, and a ground conductor. The base is an elongate flexible dielectric including first and second lengthwise portions. The first portion has opposed faces in the thickness direction. The cover, dielectric being lower in permittivity than the base, is fixedly cover at least one of the faces. The signal and ground conductors at the base extend in parallel with and in spaced relation to each other. The conductors each include a first portion covered by the cover and a second portion not covered by the cover. A part of the second portion of the ground conductor situated in a second region of the second portion of the base is smaller in area than a part of the first portion of the ground conductor situated in a first region of the first portion of the base, the first region being equal in area to the second region.

A method of making a PCB dielectric layer comprises the following steps: choosing two identical prepregs when making a dielectric layer of a multilayer printed circuit board; measuring the longitudinal glass fiber spacing a and the latitudinal glass fiber spacing b of the prepregs; completely overlapping the two identical prepregs, wherein, the longitudinal glass fiber bundles of the two prepregs extend along the X-axis direction, and the latitudinal glass fiber bundles of the two prepregs extend along the Y-axis direction; moving the lower prepreg along the X-axis direction and the Y-axis direction by X1 and Y1 respectively for dislocation, wherein X1 is non-integer times of a, and Y1 is non-integer times of b; pre-stacking the dislocated prepreg and a core board to get a pre-stacked board, coating the surface of the pre-stacked board with copper foil, placing the pre-stacked board on the chassis of a press, hot-pressing the pre-stacked board to form a multilayer board, and drilling, plating and etching the multilayer board to form an impedance controlled circuit. The uniformity of dielectric constant of the dielectric layer can be improved effectively.

A method for feeding electric power to a planar light-emitting element which includes a planar anode electrode, a planar cathode electrode, a light-emitting layer provided between the anode electrode and the cathode electrode, two or more anode terminal portions protruding from the anode electrode and one or more cathode terminal portions protruding from the cathode electrode. The method includes sequentially providing the electric power to the anode terminal portions.

The invention discloses a fan-out wire structure, a display panel and a display device. The fan-out wire structure comprises a first fan-out layer, a second fan-out layer, and an insulating layer arranged between the first fan-out layer and the second fan-out layer; the first fan-out layer, the second fan-out layer and the insulating layer are arranged from top to bottom; the first fan-out layer comprises a plurality of first wires arranged at intervals; the second fan-out layer comprises a plurality of second wires arranged at intervals; the first wires and the second wires are alternately arranged; and the first wires and the second wires which are adjacent are partially overlapped. According to the technical scheme, the first fan-out layer and the second fan-out layer are arranged, andthe first wires and the second wires which are adjacent are partially overlapped and insulated mutually; and through the two-layer structure arrangement, when the space is compressed, the first wiresand the second wires have larger design space, so that the impedance difference of the wires is reduced.

The invention discloses a composite material for shielding electromagnetic radiation, and the composite material is prepared from raw materials of silicon carbide fiber, thermoplastic acrylic resin, aferrocene organic magnet, N-phenyl-beta-naphthylamine, zinc stearate, polyvinyl chloride, a conductive filler, a coupling agent, a filler, a stabilizer and other auxiliary agents; the composite material combines the advantages of a multilayer structural material and a gradient structural material, and has the performances superior to that of the two materials. Due to the impedance mismatch between a material absorption layer and a reflection layer, incident electromagnetic wave may generate multiple reflections, propagation paths of the electromagnetic wave in the material can be increased, and by the increase of multiple-reflection loss and absorption loss, the shielding effectiveness of the material become larger; the difference in impedance between the absorption layer and the reflection layer is reduced, so that the electromagnetic wave may not escape the shielding material too quickly due to reflection, and can enter a next shielding unit more, and the shielding effectiveness ofthe material can be further improved. Therefore, the composite shielding material of the structure has better shielding properties.

The invention discloses an impedance measuring component, an impedance measuring device and an impedance measuring method. The impedance measuring component comprises a pressing rod, a connecting shaft and a first probe, wherein the connecting shaft is connected with one end of the pressing rod; the first probe is fixed on the pressing rod; one end of the first probe is electrically connected with an electrode of an impedometer; when the pressing rod is pressed down, the other end of the first probe is electrically connected with a measuring point of an article to be measured. The impedance measuring device comprises the impedance measuring component. The impedance measuring device is adopted in the impedance measuring method. The difference of impedance of the article to be measured can be reduced, the measurement stability can be improved, and moreover the impedance measuring device is relatively rapid, convenient and flexible to measure, and is relatively wide in applicability.

The invention relates to a driving integrated circuit with A fan-out line compensation design, and the circuit comprises a plurality of driving lines, a signal input unit and a compensation unit. Thedriving lines are arranged along a first direction. Each driving circuit is provided with an input end and an output end. The signal input unit is electrically connected with the input end and provides a driving signal. The plurality of connection pads are arranged corresponding to the driving circuit, and each connection pad is electrically connected with the output end. The compensation unit isarranged on the driving circuit. The driving signal is transmitted to the connecting pad through the compensation unit. The drive circuit has a time constant distribution in a first direction that varies in a first curve. The compensation unit has a second curve change based on the first curve, and the second curve and the first curve have opposite trend changes.

The invention provides a stimulating electrode structure. The stimulating electrode structure comprises an insulated substrate and a plurality of stimulating electrodes arranged in the insulated substrate and forming an array body arranged in a two-dimensional direction parallel to the insulated substrate, wherein the stimulating electrodes protrude from the surface of the insulated substrate; electrode heights of the stimulating electrodes are roughly same; and the electrode distances between the stimulating electrodes and the surface of the insulated substrate are gradually reduced from the center of the array body to the edge of the array body. According to the stimulating electrode structure, in an electrode array of an artificial retina, the array body composed of the three-dimensional stimulating electrodes is formed and the impedance difference between the stimulating electrodes is reduced, so that the retina can be stimulated more effectively.