30results about How to "Lower trip voltage" patented technology

The invention provides a gate driving circuit, a gate driving method and a liquid crystal display. The gate driving circuit comprises multiple levels of shifting registers, wherein each level of shifting register comprises an upward pulling driving unit, an upward pulling unit, a resetting unit, a downward pulling unit and a complementing unit; each upward pulling unit is used for taking a clock signal at a first clock end as an output of the corresponding level shifting register at a conducting moment; and each complementing unit is connected with each upward pulling unit and is used for taking a clock signal at a second clock end as the output of the corresponding level shifting register at the conducting moment. The complementing unit of each level shifting register in the gate driving circuit provided by the invention is conducted and operated at the turn-off moment of a TFT (Thin Film Transistor) so as to control the output of the corresponding level shifting register, so that the leaping voltage is reduced, an MLG (multi-level gate) function is realized and the frame quality of the liquid crystal display is increased.

The invention relates to a liquid crystal display and a control method thereof. The liquid crystal display comprises a colour filter panel and an array panel, wherein a storage capacitance electrode wire and a gate line which is connected with a scan drive circuit are formed on the array panel; a common electrode is formed on the colour filter panel or the array panel; and the storage capacitance electrode wire is connected with a control circuit which is used for controlling the electric potential of a storage capacitance electrode. When the scan drive circuit applies a square row scanning signal to the gate line and a scanning signal rising edge approaches, the control circuit applies a first voltage to the storage capacitance electrode wire according to a control voltage; and when a row scanning signal falling edge approaches, the control circuit applies a second voltage to the storage capacitance electrode wire according to the control voltage, wherein the first voltage is less than the second voltage. The control method of the invention is applied to the manufacturing of liquid crystal displays.

A power up signal generator includes a signal converter for converting an applied external source voltage to a voltage applied at a trigger node when the external source voltage rises to a first threshold, and a current source for flowing a reference current from the trigger node. A first inverter connected to the trigger node outputs a low level signal when the trigger node voltage reaches a second threshold. A second inverter outputs a power up signal after receiving the low level signal from the first inverter. The signal converter may include a PMOS transistor configuration, such that the trip voltage of the power up signal generator is dependent only on a single MOSFET transistor threshold voltage.

The invention relates to a TFT-LCD (Thin Film Transistor Liquid Crystal Display) array substrate and a manufacture method thereof. The array substrate comprises a grid line and a data line which are formed on the substrate, wherein a pixel electrode and a thin film transistor are formed in a pixel region limited by the grid line and the data line; a first insulating layer and a second insulating layer are formed between the grid line and the data line; and the pixel electrode is arranged between the first insulating layer and the second insulating layer. In the invention, through arranging the two insulating layers and arranging the pixel electrode between the two insulating layers, when the pixel electrode forms a memory capacitor with a common electrode line or the grid line, the distance between two electrode plates of the memory capacitor is only equal to the thickness of the first insulating layer, thus the distance between the two electrode plates of the memory capacitor is greatly reduced, and the memory capacitor of a unit area is greatly improved. Furthermore, because the structure of the two insulating layers is adopted, an interface formed between the insulating layers and a semiconductor layer can be improved so as to improve the characteristics of the TFT.

The invention discloses a grid drive circuit, a method thereof, an array substrate and a liquid crystal display device and relates to the technical field of liquid crystal display, so an actual pixel voltage is closer to a charge voltage and the display effect is improved. The grid drive circuit comprises a first voltage generating unit, a second voltage generating unit, a starting unit and a cut-off unit; the first voltage generating unit is used for generating a first voltage in one-line scanning time, wherein the one-line scanning time is formed by a first stage and a second stage; the second voltage generating unit is used for generating a second voltage in the first stage; the starting unit is used for outputting the sum of the first voltage and the second voltage in the first stage and outputting the first voltage in the second stage; the cut-off unit is used for outputting a cut-off voltage at the end of the one-line scanning time.

The invention discloses a TFT-LCD array substrate structure and a manufacturing method thereof, relates to the technical field of TFT-LCDs and aims at solving a problem of poor display quality of TFT-LCDs in the prior art. The TFT-LCD array substrate structure comprises a grid scanning line and a data scanning line formed on a substrate. A pixel electrode is formed in a pixel area defined by the grid scanning line and the data scanning line which are adjacent, and a TFT is formed at a crossing. The constitutional structure of the TFT comprises a grid electrode, a grid insulating layer, another grid insulating layer, a transparent conducting layer, a source electrode, a drain electrode, an ohmic contact layer, a semiconductor layer and a passivation layer from the bottom up, wherein, a contact part between the transparent conducting layer and the drain electrode is the pixel electrode, and the source electrode is connected with the data scanning line. The TFT-LCD array substrate structure is suitable for improving the display quality of the TFT-LCD.

The invention discloses a gate driving circuit which comprises multiple stages of gate driving units, wherein each of the gate driving units is used for driving one corresponding gate line on a display panel; each gate driving unit comprises an input module, a first pull-down module, an output module and a chamfering control module; each input module is used for providing a first voltage signal toa first node according to a pre-stage gate driving signal; each first pull-down module is used for providing a third voltage signal to the first node according to a first lower-stage gate driving signal; each output module is used for outputting a second voltage signal as a present-stage gate driving signal according to level of the first node; and each chamfering control module is connected withthe corresponding output module at a third node, and is used for pulling down the present-stage gate driving signal to form a present-stage gate driving signal having a chamfered waveform according to the control of a second lower-stage gate driving signal.

The invention discloses a shifting register, a driving method, a grid driving circuit and a display device. The shifting register comprises an input module, a return module, a node control module, a cutting angle control module and an output module. Due to adoption of the cutting angel control module and with cooperation of the five modules, the amplitude of a scanning signal output from a driving signal output end can be changed to form a scanning signal with a cutting angle waveform, and when the scanning signal with the cutting angle waveform is input into different pixel units of corresponding rows through different rows of grid lines in sequence, the leaping voltage delta Vp can be reduced, so that phenomena such as flicker and residual images of a display panel can be reduced, and the display quality of the display panel is improved.

The invention relates to a TFT-LCD array substrate and a making method thereof. The array substrate comprises a gate line, a data line, a thin film transistor, a pixel electrode and a common electrode line, wherein the gate line, the data line and the thin film transistor are formed on the substrate, and the pixel electrode and the common electrode line form a storage capacitor, a pulse electrodeis arranged between the common electrode line and the pixel electrode and is used for enabling the storage capacitor to have a first capacitance value when the pixel electrode is started to be charged and enabling the storage capacitor to have a second capacitance value when pixel electrode charging is finished, and the first capacitance value is smaller than the second capacitance value. In the invention, because the pulse electrode is arranged between the common electrode line and the pixel electrode, on the one hand, the storage capacitor has the smaller capacitance value when pixel electrode charging is started so as to lower load of the thin film transistor and enhance the charging capability of the thin film transistor, and on the other hand, the storage capacitor has the larger capacitance value when pixel electrode charging is finished to strengthen the holding property of voltage of the pixel electrode and lower the leaping voltage of the pixel electrode at the moment that the thin film transistor is closed.

The invention provides a scanning line drive method of an active array display. The method includes: dividing a plurality of scanning lines of the active array display into S groups, connecting each scanning line with one scanning lead, arranging S-1 scanning lines between two adjacent scanning lines in each group, S>=2 and is an integer; exerting drive signals on the scanning leads which are connected with the plurality of scanning lines of the active array display line by line, and enabling luminance of line pixels to match with each other, and the luminance of the line pixels corresponds to the Mth scanning lines in all the groups. In addition, the invention further provides a drive circuit of the scanning lines of the active array display and an active array display with the drive circuit. Due to the adoption of the technical scheme, the problem that display effects of scanning lines of an existing active array display are not the same is solved.

The embodiment of the invention discloses an array substrate and a display device, and relates to the field of liquid crystal display. The array substrate and the display device have the advantages that the jumping voltage of pixel electrodes is reduced, and further the picture display is more stable. The array substrate comprises the pixel electrodes, a data line, first thin film transistors and second thin film transistors, wherein the data line is used for providing a data voltage signal to the pixel electrodes, each pixel electrode is connected with one first thin film transistor and one second thin film transistor, each first thin film transistor comprises a first grid, each second thin film transistor comprises a second grid, two grid lines are arranged between the two adjacent pixel electrodes, each first grid is electrically connected with one grid line, each second grid is electrically connected with the other grid line, and each first grid and each second grid are not simultaneously cut off after a switch voltage signal is provided.

A power up signal generator includes a signal converter for converting an applied external source voltage to a voltage applied at a trigger node when the external source voltage rises to a first threshold, and a current source for flowing a reference current from the trigger node. A first inverter connected to the trigger node outputs a low level signal when the trigger node voltage reaches a second threshold. A second inverter outputs a power up signal after receiving the low level signal from the first inverter. The signal converter may include a PMOS transistor configuration, such that the trip voltage of the power up signal generator is dependent only on a single MOSFET transistor threshold voltage.

The invention provides a pixel structure for a thin film transistor liquid crystal display, wherein a pixel electrode and a transparent conducting layer are formed on a substrate; a drain electrode isformed on the pixel electrode, a data scanning line and a source electrode are formed on the transparent conducting layer, the source electrode is connected with the data scanning line, and the drainelectrode is connected with the pixel electrode; an ohmic contact layer and a semiconductor layer are formed on the source electrode and the drain electrode respectively, and the contact part of theohmic contact layer and the source electrode is not connected with the contact part of the ohmic contact layer and the drain electrode; a passivation layer is formed on the parts of the source electrode and the drain electrode which are not covered by the ohmic contact layer, the part of the ohmic contact layer which is not covered by the semiconductor layer, and the semiconductor layer respectively; and a grid scanning line, a grid electrode and a grid electrode insulating layer are sequentially formed on the passivation layer. Simultaneously, the invention provides a method for manufacturingthe pixel structure for the thin film transistor liquid crystal display, and the pixel structure and the manufacturing method can save the manufacturing technological process and enlarge the storagecapacitance.

The invention relates to a TFT-LCD array substrate and a making method thereof. The array substrate comprises a gate line, a data line, a thin film transistor, a pixel electrode and a common electrode line, wherein the gate line, the data line and the thin film transistor are formed on the substrate, and the pixel electrode and the common electrode line form a storage capacitor, a pulse electrodeis arranged between the common electrode line and the pixel electrode and is used for enabling the storage capacitor to have a first capacitance value when the pixel electrode is started to be charged and enabling the storage capacitor to have a second capacitance value when pixel electrode charging is finished, and the first capacitance value is smaller than the second capacitance value. In the invention, because the pulse electrode is arranged between the common electrode line and the pixel electrode, on the one hand, the storage capacitor has the smaller capacitance value when pixel electrode charging is started so as to lower load of the thin film transistor and enhance the charging capability of the thin film transistor, and on the other hand, the storage capacitor has the larger capacitance value when pixel electrode charging is finished to strengthen the holding property of voltage of the pixel electrode and lower the leaping voltage of the pixel electrode at the moment that the thin film transistor is closed.

A thin film transistor liquid crystal display (TFT-LCD) array substrate comprising a gate line and a data line formed on a base substrate. The gate line and the data line intersect with each other to define a pixel region, in which a pixel electrode and a thin film transistor (TFT) are formed, and a first insulating layer and a second insulating layer are interposed between the gate line and the data line, and the pixel electrode is disposed between the first insulating layer and the second insulating layer. A method of manufacturing a TFT-LCD is also disclosed.

The invention discloses an array substrate, a display device and a method for manufacturing the array substrate, and relates to the technical field of liquid crystal display. Leaping voltages generated by stray capacitance can be lowered, and therefore the display effect can be improved. The array substrate comprises a grid line, a data line, a thin film transistor and a transparent electrode. The grid electrode of the thin film transistor is connected to the grid line, the source electrode of the thin film transistor is connected to the data line, and the drain electrode of the thin film transistor is connected to the transparent electrode. Grid through holes are formed in the area, overlapping with the drain electrode, in the grid electrode, or the grid electrode comprises a first area, and the thickness of the grid electrode inside the first area is smaller than the thickness of the grid electrode outside the first area. The first area is placed in the area, overlapping with the drain electrode, in the grid electrode.

Embodiments of the present invention disclose an array substrate and a driving method thereof, and a display device. The array substrate comprises: a pixel electrode; a data line; a first thin film transistor comprising a first gate electrode, a first source electrode and a first drain electrode, and a second thin film transistor comprising a second gate electrode, a second source electrode and a second drain electrode; a first gate line connected with the first gate electrode and a second gate line connected with the second gate electrode, wherein the first source electrode and the second source electrode are electrically connected with the data line, and the first drain electrode and the second drain electrode are electrically connected with the pixel electrode.

The invention discloses a shift register, a driving method thereof, a gate driving circuit and a display device, comprising: an input module, a reset module, a node control module, a chamfer control module and an output module; by setting the chamfer control module and passing The mutual cooperation of the above five modules can change the amplitude of the scanning signal output from the drive signal output terminal to form a scanning signal with a chamfered waveform. When the scanning signal with a chamfered waveform is input through each row of grid lines in sequence When it reaches each pixel unit in the corresponding row, the jump voltage ΔVp can be reduced, so as to improve the flickering, afterimage and other phenomena of the display panel, and improve the display quality of the display panel.

The invention provides a scanning line drive method of an active array display. The method includes: dividing a plurality of scanning lines of the active array display into S groups, connecting each scanning line with one scanning lead, arranging S-1 scanning lines between two adjacent scanning lines in each group, S>=2 and is an integer; exerting drive signals on the scanning leads which are connected with the plurality of scanning lines of the active array display line by line, and enabling luminance of line pixels to match with each other, and the luminance of the line pixels corresponds to the Mth scanning lines in all the groups. In addition, the invention further provides a drive circuit of the scanning lines of the active array display and an active array display with the drive circuit. Due to the adoption of the technical scheme, the problem that display effects of scanning lines of an existing active array display are not the same is solved.

The invention relates to a liquid crystal display and a control method thereof. The liquid crystal display comprises a color film substrate and an array substrate, wherein common electrodes are formed on the color film substrate, and storage capacitance electrode lines and grid lines connected with a scanning drive circuit are formed on the array substrate; and the storage capacitor electrode lines are connected with a control circuit for controlling storage capacitance electrode potentials. When the scanning drive circuit applies square line scan signals on the grid lines, and the rising edge of the scan signals comes, the control circuit applies a first voltage on the storage capacitance electrode lines, and when the falling edge of the scan signals comes, the control circuit applies a second voltage on the storage capacitance electrode lines; and the first voltage is smaller than a common electrode voltage applied on the common electrodes of the color film substrate, and the secondvoltage is larger than the common electrode voltage. The invention can output pulse voltages on the storage capacitance electrode lines, so that the potential difference between liquid crystal layerscan be compensated when the line scan signals change, thereby being favorable for improving the display picture quality of the liquid crystal display.

The invention provides a TFT-LCD (Thin-film transistor liquid crystal display) array base plate, a manufacturing method and an LCD. The method includes the following steps: forming a grid scanning line and a grid as well as a broken data signal line, a common electrode and a shading strip at the positions that the broken data signal line, the common electrode and the shading strip are crossed with the grid scanning line at one step during the first picture composition process; during the second picture composition process, forming a via hole used for connecting the broken data signal line and a channel position on the grid scanning line; and during the third picture composition process, forming a pixel electrode, a data signal line connecting line, a source electrode and a drain electrode, wherein the data signal line connecting line is used for connecting the broken data signal line through a via hole, the TFT is positioned at the position where the grid scanning line is crossed with the data signal line connecting line, the source electrode is positioned on the data signal line connecting line, and the drain electrode and the pixel electrode form into a whole. According to the invention, the three-time mask technology is adopted to shorten the production phase and reduce the cost, and besides, the performance of the TFT-LCD array base plate is improved.

The invention provides an array substrate, a manufacturing method thereof, a display panel and a display device. Second pixel electrodes are arranged between each first electrode wire and a corresponding second electrode wire of the array substrate, and the second pixel electrodes are electrically connected with a first pixel electrode belonging to the same pixel unit as the second pixel electrodes; by increasing the area of the pixel electrodes, the leaping voltage of the display device is reduced, and the display quality of the display device can be ensured.

The invention relates to a TFT-LCD array substrate and a manufacturing method thereof. The array substrate comprises a gate line, a data line, pixel electrodes and thin film transistors which are formed on the substrate, wherein a cavity containing a parasitic area is arranged between the thin film transistors; the parasitic area is the overlap area between a drain electrode and a gate electrode;the gate line and the gate electrode are formed on the substrate; an insulating layer is formed on the gate line and the gate electrode; and the cavity is formed by a groove arranged on the insulating layer. Through forming the cavity structure in the overlap area between the drain electrode and the gate electrode, the invention reduces the dielectric constant of the dielectric layer between the drain electrode and the gate electrode, effectively reduces the parasitic capacitance and further effectively reduces the leaping voltage generated by the pixel electrodes. Reduction of the leaping voltage can effectively reduce unevenness of the leaping voltage generated by each pixel electrode and eliminates various mura defects. The invention has simple technical means, is easy to implement andhas wide application prospect.

The present disclosure provides a gate driving circuit, a gate driving method and a liquid crystal display. Said gate driving circuit includes shift registers at a plurality of stages, wherein the shift register at each stage includes a pull-up driving unit, a pull-up unit, a reset unit, a pull-down unit and a supplementary unit; said pull-up unit is used for making a clock signal at a first clock terminal an output signal of the shift register at the present stage when being turned on; said supplementary unit, connected to said pull-up unit, is used for making a clock signal at a second clock terminal the output signal of the shift register at the present stage when being turned on. With the supplementary unit of the shift register at each stage in the gate driving circuit, the present disclosure controls the output of the shift register through turning on the supplementary unit at the instant of the TFT being turned off, which can reduce voltage jump of a pixel, achieve the MLG function and enhance the picture quality of the LCD.

The invention provides a pixel structure for a thin film transistor liquid crystal display, wherein a pixel electrode and a transparent conducting layer are formed on a substrate; a drain electrode is formed on the pixel electrode, a data scanning line and a source electrode are formed on the transparent conducting layer, the source electrode is connected with the data scanning line, and the drain electrode is connected with the pixel electrode; an ohmic contact layer and a semiconductor layer are formed on the source electrode and the drain electrode respectively, and the contact part of the ohmic contact layer and the source electrode is not connected with the contact part of the ohmic contact layer and the drain electrode; a passivation layer is formed on the parts of the source electrode and the drain electrode which are not covered by the ohmic contact layer, the part of the ohmic contact layer which is not covered by the semiconductor layer, and the semiconductor layer respectively; and a grid scanning line, a grid electrode and a grid electrode insulating layer are sequentially formed on the passivation layer. Simultaneously, the invention provides a method for manufacturing the pixel structure for the thin film transistor liquid crystal display, and the pixel structure and the manufacturing method can save the manufacturing technological process and enlarge the storage capacitance.