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 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 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.