WO2014205862A1

WO2014205862A1 - Liquid crystal display panel and liquid crystal display device

Info

Publication number: WO2014205862A1
Application number: PCT/CN2013/078649
Authority: WO
Inventors: 董成才
Original assignee: 深圳市华星光电技术有限公司
Priority date: 2013-06-28
Filing date: 2013-07-02
Publication date: 2014-12-31
Also published as: CN103323990B; CN103323990A

Abstract

A liquid crystal display panel and a liquid crystal display device. In the liquid crystal display panel, each pixel unit (104) of a first substrate (10) comprises a first pixel electrode (1041) and a second pixel electrode (1042), wherein a charging scanning line (101) and a data line (103) respectively drive the first pixel electrode (1041) and the second pixel electrode (1042) to display, by means of a first switch (1043) and a second switch (1044), a third switch (1045) is connected to a discharging scanning line (102), an input end of the third switch (1045) is connected to the first pixel electrode (1041) or the second pixel electrode (1042), and an output end of the third switch (1045) is connected to a discharging circuit; a second substrate (11) comprises a first common electrode (111) and a second common electrode (112), wherein the first common electrode (111) corresponds to the first pixel electrode (1041) so as to provide a first common voltage, and the second common electrode (112) corresponds to the second pixel electrode (1042) so as to provide a second common voltage. In this way, the effect of low colour cast at a large angle of view can be improved, and it is beneficial for reducing the phenomena of residual images at the same time.

Description

Liquid crystal display panel and liquid crystal display device

【技术领域】[Technical Field]

The present invention relates to the field of display technologies, and in particular, to a liquid crystal display panel and a liquid crystal display device.

【背景技术】【Background technique】

TFT-LCD liquid crystal displays are popular among consumers because of their small size, thin thickness, light weight, and flicker-free picture. They have gradually replaced traditional CRT displays and occupied most of the display market. However, in TFT-LCD, there is a general role of the big view (Low Color Shift) problem, that is, the color difference is large under a large viewing angle, and the color distortion is more serious, especially the large-size liquid crystal display panel using the VA display technology is more prominent. In order to solve the above problem, it is common practice to divide one pixel region in the array substrate into a main pixel region and a sub-pixel region, so that the two regions exhibit different Gamma curves. The Gamma curve synthesized in the two regions has a small difference from the positive viewing angle at a large viewing angle, which significantly improves the problem of the large-view character bias.

A common electrode on a color filter (CF) substrate is used to provide a common voltage to the pixel electrodes of the array substrate. However, the common electrodes on the CF substrate are usually connected together. When a design is adopted in which one pixel region is divided into two pixel regions, the main pixel region and the sub-pixel region share the same common electrode voltage on the side of the color filter substrate. The common common voltage of the main pixel area and the sub-pixel area cannot be independently controlled, which brings difficulty in controlling the Gamma curve of the two pixel areas, and reduces the effect of the large-view character bias. In addition, the common voltage shared by the main pixel region and the sub-pixel region may not be the optimum common electrode voltage of the main pixel region and the sub-pixel region, which may cause charge residue in the main pixel region and the sub-pixel region, resulting in image sticking. problem.

【发明内容】 [Summary of the Invention]

The technical problem to be solved by the present invention is to provide a liquid crystal display panel and a liquid crystal display device, which can effectively reduce color shift of a large viewing angle, reduce color distortion, and reduce image sticking.

In order to solve the above technical problem, a technical solution adopted by the present invention is to provide a liquid crystal display panel including a first substrate, a second substrate, a first common electrode driver, a second common electrode driver, and the first substrate and the second substrate. a liquid crystal layer between the substrates; the first substrate comprises a plurality of charging scan lines, a plurality of discharge scan lines, a plurality of data lines, and a plurality of pixel units arranged in rows and columns, each pixel unit corresponding to one charging scan line and one discharge scan line And a data line; each of the pixel units includes a first pixel electrode, a second pixel electrode, and first and second switches respectively acting on the first pixel electrode and the second pixel electrode, each of the pixel units further including a third switch And a discharge circuit, each switch includes a control end, an input end, and an output end, wherein the control ends of the first switch and the second switch are connected to a charging scan line corresponding to the pixel unit, and the input ends of the first switch and the second switch Connected to the data line corresponding to the pixel unit, the output end of the first switch is connected to the first pixel electrode, and the output of the second switch is The terminal is connected to the second pixel electrode, the control end of the third switch is connected to the discharge scan line, the input end of the third switch is connected to the first pixel electrode or the second pixel electrode, and the output end of the third switch is connected to the discharge circuit to Forming a first voltage difference between the first pixel electrode and the second pixel electrode to form a non-zero predetermined voltage difference when driving the first pixel electrode and the second pixel electrode; the second substrate includes mutually independent first common electrodes and second a common electrode, the first common electrode corresponding to the first pixel electrode to provide a first common voltage, the first common electrode driver being connected to the first common electrode to input the first common voltage to the first common electrode, and the second common electrode a second pixel electrode corresponding to provide a second common voltage, the second common electrode driver being coupled to the second common electrode to input a second common voltage to the second common electrode; wherein the first common electrode includes a plurality of first sub-common electrodes, The second common electrode includes a plurality of second sub-common electrodes, and the first sub-common electrode and the second sub-common electrode are independent of each other, and each of the first sub-publics The length direction is the same as the arrangement direction of the plurality of first pixel electrodes disposed adjacent to each other such that each of the first sub-common electrodes corresponds to one row or one column of the first pixel electrodes to provide an image when the first pixel electrode is matched to display an image a first common voltage required, the length direction of each of the second sub-common electrodes is the same as the arrangement direction of the plurality of second pixel electrodes disposed adjacent to each other such that each of the second sub-common electrodes is aligned with one row or one column The pixel electrodes correspond to provide a second common voltage required to match the second pixel electrode to display an image.

All of the first sub-common electrodes are electrically connected to a region of the second substrate corresponding to a periphery of the display region of the liquid crystal display panel, and all of the second sub-common electrodes are corresponding to the corresponding ones in the second substrate. The area around the display area of the liquid crystal display panel is electrically connected.

Wherein, the first sub-common electrode and the second sub-common electrode have a strip shape.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a liquid crystal display panel including a first substrate, a second substrate, and a liquid crystal layer between the first substrate and the second substrate; the first substrate includes a plurality of charging scan lines, a plurality of discharge scan lines, a plurality of data lines, and a plurality of pixel units arranged in an array, each pixel unit corresponding to one charge scan line, one discharge scan line, and one data line; each pixel unit includes a pixel electrode, a second pixel electrode, and first and second switches respectively acting on the first pixel electrode and the second pixel electrode, each pixel unit further comprising a third switch and a discharge circuit, each switch including a control end And the input end and the output end, the control ends of the first switch and the second switch are all connected with the charging scan line corresponding to the pixel unit, and the input ends of the first switch and the second switch are connected with the data lines corresponding to the pixel unit, The output end of the first switch is connected to the first pixel electrode, the output end of the second switch is connected to the second pixel electrode, and the control of the third switch Connected to the discharge scan line, the input end of the third switch is connected to the first pixel electrode or the second pixel electrode, and the output end of the third switch is connected to the discharge circuit to display the first pixel electrode and the second pixel electrode when driving Forming a preset voltage difference that is not zero between the first pixel electrode and the second pixel electrode; the second substrate includes a first common electrode and a second common electrode, and the first common electrode corresponds to the first pixel electrode to provide the first A common voltage, the second common electrode corresponding to the second pixel electrode to provide a second common voltage.

The first common electrode and the second common electrode are independent of each other, the first common electrode includes a plurality of first sub-common electrodes, and the second common electrode includes a plurality of second sub-common electrodes, the first sub-common electrode and the second sub-common The electrodes are independent of each other, and the length direction of each of the first sub-common electrodes is the same as the arrangement direction of the plurality of first pixel electrodes disposed adjacent to each other such that each of the first sub-common electrodes corresponds to one row or one column of the first pixel electrodes, To provide a first common voltage required to match the first pixel electrode to display an image, the length direction of each of the second sub-common electrodes is the same as the arrangement direction of the plurality of second pixel electrodes disposed adjacently adjacent to each other The second sub-common electrode corresponds to one row or column of second pixel electrodes to provide a second common voltage required to match the second pixel electrode to display an image.

Wherein the liquid crystal display panel includes a first common electrode driver and a second common electrode driver, the first common electrode driver being connected to the first common electrode to input a first common voltage to the first common electrode, The second common electrode driver is connected to the second common electrode to input a second common voltage to the second common electrode.

The first substrate further includes a third common electrode, and the discharge circuit includes a first capacitor and a second capacitor. When the input end of the third switch is connected to one of the first pixel electrode and the second pixel electrode, One end of the first capacitor is connected to the other pixel electrode, the other end of the first capacitor is connected to one end of the second capacitor, the other end of the second capacitor is connected to the third common electrode of the first substrate, and the output end of the third switch is connected a first capacitor and a second capacitor; wherein a scan signal is input to the charge scan line to control the first switch and the second switch to be turned on, and a data signal is input to the data line to drive the display of the first pixel electrode and the second pixel electrode, Then, the scan signal is input to the charging scan line, and the scan signal is input to the discharge scan line to control the third switch to be turned on. Under the action of the first capacitor and the second capacitor, a pre-form is formed between the first pixel electrode and the second pixel electrode. Set the voltage difference.

The first substrate further includes a third common electrode, the discharge circuit is a discharge capacitor, the input end of the third switch is connected to the first pixel electrode or the second pixel electrode, and the output end of the third switch is connected to one end of the discharge capacitor. The other end of the discharge capacitor is connected to the third common electrode of the first substrate; wherein a scan signal is input to the charge scan line to control the first switch and the second switch to be turned on, and a data signal is input to the data line to drive the first pixel electrode and The second pixel electrode displays, then stops inputting the scan signal to the charging scan line, inputs a scan signal to the discharge scan line to control the third switch to be turned on, and controls the size of the discharge capacitor to form a gap between the first pixel electrode and the second pixel electrode. The preset voltage difference.

The charging scan line, the discharge scan line, the first switch, the second switch, the third switch, and the discharge circuit are all located between the first pixel electrode and the second pixel electrode.

The first switch, the second switch and the third switch are all thin film transistors, and the control end of the switch corresponds to the gate of the thin film transistor, the input end of the switch corresponds to the source of the thin film transistor, and the output end of the switch corresponds to the thin film transistor The drain.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a liquid crystal display device including a liquid crystal display panel, the liquid crystal display panel including a first substrate, a second substrate, and between the first substrate and the second substrate The liquid crystal layer; the first substrate comprises a plurality of charging scan lines, a plurality of discharge scan lines, a plurality of data lines, and a plurality of pixel units arranged in an array, each pixel unit corresponding to one charging scan line, one discharge scan line and one piece of data a first pixel electrode, a second pixel electrode, and first and second switches respectively acting on the first pixel electrode and the second pixel electrode, each of the pixel units further including a third switch and a discharge circuit Each switch includes a control end, an input end, and an output end. The control ends of the first switch and the second switch are connected to the charging scan line corresponding to the pixel unit, and the input ends of the first switch and the second switch are corresponding to each other. The data line of the pixel unit is connected, the output end of the first switch is connected to the first pixel electrode, and the output end of the second switch is a pixel electrode is connected, a control end of the third switch is connected to the discharge scan line, an input end of the third switch is connected to the first pixel electrode or the second pixel electrode, and an output end of the third switch is connected to the discharge circuit to drive the first When the pixel electrode and the second pixel electrode are displayed, a preset voltage difference that is not zero is formed between the first pixel electrode and the second pixel electrode; the second substrate includes a first common electrode and a second common electrode, and the first common electrode Corresponding to the first pixel electrode to provide a first common voltage, the second common electrode corresponding to the second pixel electrode to provide a second common voltage.

The invention has the advantages that the liquid crystal display panel of the present invention is different from the prior art. In the first substrate, each pixel unit includes a first pixel electrode and a second pixel electrode, and the charging scan corresponding to the pixel unit The line and the data line respectively drive the display of the first pixel electrode and the second pixel electrode through the first switch and the second switch, the third switch is connected to the discharge scan line corresponding to the pixel unit, and the input end of the third switch and the first pixel electrode Or the second pixel electrode is connected, the output end of the third switch is connected to the discharge circuit, and when the first pixel electrode and the second pixel electrode are driven to be displayed, the first pixel electrode and the second pixel electrode are caused by the action of the discharge circuit Forming a preset voltage difference that is not zero, that is, the voltages of the first pixel electrode and the second pixel electrode are different, so that the liquid crystal molecules of the liquid crystal layers corresponding to the first pixel electrode and the second pixel electrode are arranged in different directions. Thereby, the color difference at a large viewing angle can be reduced. In addition, the second substrate includes a first common electrode and a second common electrode, and the first common electrode corresponds to the first pixel electrode to provide a first common voltage required when the first pixel electrode is matched to display an image, and the second common The electrode corresponds to the second pixel electrode to provide a second common voltage required to match the second pixel electrode to display an image, thereby being capable of separately controlling a common voltage required when the image is displayed in cooperation with the first pixel electrode and the second pixel electrode Thereby, the low color shift effect can be further improved, and the image sticking can be effectively reduced.

【附图说明】 [Description of the Drawings]

1 is a schematic structural view of an embodiment of a liquid crystal display panel of the present invention;

2 is a schematic structural view of the first substrate of FIG. 1;

3 is a schematic structural view of a pixel electrode of the first substrate and a common electrode of the second substrate of FIG. 1;

4 is a schematic view showing deflection of liquid crystal molecules of the liquid crystal layer of FIG. 1 under control of a pixel electrode of a first substrate and a common electrode of a second substrate;

FIG. 5 is a schematic structural view of a first substrate in another embodiment of the liquid crystal display panel of the present invention.

【具体实施方式】【detailed description】

The invention will now be described in detail in conjunction with the specific embodiments and drawings.

Referring to FIGS. 1-3, in an embodiment of the liquid crystal display panel of the present invention, the liquid crystal display panel includes a first base 10, a second substrate 11, and a liquid crystal layer 12 between the first substrate 10 and the second substrate 11. The first substrate 10 is an array substrate in a liquid crystal display panel, and the second substrate 11 is a color filter substrate in the liquid crystal display panel.

2, FIG. 2 is a schematic structural view of the first substrate 10 of the present embodiment. The first substrate 10 includes a plurality of charging scan lines 101, a plurality of discharge scan lines 102, a plurality of data lines 103, and a plurality of pixel units 104 arranged in an array. The plurality of charging scanning lines 101 and the discharging scanning lines 102 are alternately arranged in the column direction. Each of the pixel units 104 corresponds to one charge scan line 101, one discharge scan line 102, and one data line 103. The pixel unit 104 includes a first pixel electrode 1041 and a second pixel electrode 1042, and a first switch 1043 and a second switch 1044 that respectively act on the first pixel electrode 1041 and the second pixel electrode 1042. The first pixel electrode 1041 and the second pixel electrode 1042 are arranged in the column direction. The pixel unit 104 further includes a third switch 1045 and a discharge circuit 1046. The first pixel electrode 1041 and the second pixel electrode 1042 are arranged in the column direction. Each switch includes a control terminal, an input terminal, and an output terminal. The control end of the first switch 1043 and the control end of the second switch 1044 are both connected to the charging scan line 101, and the input end of the first switch 1043 and the input end of the second switch 1044 are both connected to the data line 103, and the first switch 1043 The output end is connected to the first pixel electrode 1041, and the output end of the second switch 1044 is connected to the second pixel electrode 1042. The control terminal of the third switch 1045 is connected to the discharge scan line 102, the input terminal of the third switch 1045 is connected to the second pixel electrode 1042, and the output terminal of the third switch 1045 is connected to the discharge circuit. In the embodiment, the first substrate 10 further includes a third common electrode 105. The discharge circuit is a discharge capacitor 1046. The output end of the third switch 1045 is connected to one end of the discharge capacitor 1046, and the other end of the discharge capacitor is connected to the third common electrode 105 on the first substrate 10.

3, FIG. 3 is a schematic structural view of a pixel electrode of the first substrate 10 and a common electrode of the second substrate 11 in the present embodiment. The second substrate 11 includes a first common electrode 111 and a second common electrode 112 which are independent of each other, and the number of the first common electrode 111 and the second common electrode 112 is one. The first common electrode 111 corresponds to the first pixel electrode 1041 to provide a first common voltage, and the second common electrode 112 corresponds to the second pixel electrode 1042 to provide a second common voltage. Specifically, the first common electrode 111 includes a plurality of first sub-common electrodes 1111 in the shape of a strip (only two are shown in the figure), and the second common electrode 112 includes a plurality of second sub-common electrodes 1121 in the shape of a strip ( Only two are marked in the figure). The length direction of each of the first sub-common electrodes 1111 is the same as the arrangement direction of the row of first pixel electrodes 1041, that is, the length direction of each of the first sub-common electrodes 1111 is the row direction, so that one row of each row of pixel units 104 One pixel electrode 1041 corresponds to one first sub-common electrode 1111; the length direction of each second sub-common electrode 1121 is the same as the arrangement direction of one row of second pixel electrodes 1042, that is, the length direction of each second sub-common electrode 1121 is a row. The direction is such that one row of the second pixel electrode 1042 in each row of pixel units 104 corresponds to one second sub-common electrode 1121. The first sub-common electrode 1111 and the second sub-common electrode 1121 are insulated from each other and arranged in the same direction as the arrangement direction of the first pixel electrode 1041 and the second pixel electrode 1042. In the column direction, the first pixel electrode 1041 and the second pixel electrode 1042 are alternately arranged, and the first sub-common electrode 1111 and the second sub-common electrode 1121 are also alternately arranged in the column direction. In addition, all of the first sub-common electrodes 1111 are electrically connected together in a region of the second substrate 11 corresponding to the periphery of the display region of the liquid crystal display panel, and all of the first sub-common electrodes 1111 electrically connected together as a first common The second sub-common electrode 1121 is electrically connected to the region of the second substrate 11 corresponding to the periphery of the display region of the liquid crystal display panel, and all the second sub-common electrodes 1121 electrically connected together are used as a second. Common electrode 112. In a practical application, when the first common electrode 111 and the second common electrode 112 of the present embodiment are fabricated, for example, when the first common electrode 111 is formed, a single transparent electrode can be used, and the entire transparent electrode can be used. The portion corresponding to the display area of the liquid crystal display panel is divided into a plurality of strip-shaped electrodes to correspondingly obtain the plurality of first sub-common electrodes 1111, and the area of the entire transparent electrode corresponding to the periphery of the display area of the liquid crystal display panel is not The division is performed such that the plurality of first sub-common electrodes 1111 are electrically connected through the transparent electrodes corresponding to the peripheral portions of the display region. The second common electrode 112 can also be obtained by a similar manufacturing method.

In an alternative embodiment, all the first sub-common electrodes may also be electrically connected in a region of the second substrate corresponding to the display region of the liquid crystal display panel, and all the second sub-common electrodes may also be in the display region corresponding to the liquid crystal display panel. The area is electrically connected and is not limited here. Further, the first sub-common electrode and the second sub-common electrode may also have other shapes such as a column shape or a triangle shape, and are not limited to the above-described strip shape.

The liquid crystal display panel further includes a first common electrode driver and a second common electrode driver. The first common electrode driver is connected to the first common electrode 111. Specifically, the first common electrode driver is connected to the first sub-common electrode 1111 to input a first common voltage to the first sub-common electrode 1111. The second common electrode driver is connected to the second common electrode 112. Specifically, the second common electrode driver is connected to the second sub-common electrode 1121 to input a second common voltage to the second sub-common electrode. Wherein, the first common electrode driver and the second common electrode driver can be implemented by using an integrated driving IC chip. In an alternative embodiment, a corresponding common voltage can be applied to the first common electrode and the second common electrode by using a driving circuit formed by discrete components, which is not limited thereto. Further, the first common electrode and the second common electrode may be driven not by the driver or the driving circuit, but the respective constant voltage signals are respectively applied to the first common electrode and the second common electrode by the two reference voltage sources.

In the present embodiment, by the action of the discharge capacitor 1046, a voltage difference of not zero between the first pixel electrode 1041 and the second pixel electrode 1042 can be formed, thereby achieving a low color shift effect. The first common electrode 111 and the second common electrode 112 respectively provide a common voltage required for the first pixel electrode 1041 and the second pixel electrode 1042 to display an image, thereby further improving the low color shift effect of the liquid crystal display panel, and Helps reduce image sticking.

Specifically, when the display of the liquid crystal display panel is driven, the scan of the scan line is performed by using a progressive scan method. First, a scan signal is applied to the charge scan line 101 to control the first switch 1043 and the second switch 1044 to be turned on, and the data line 103 passes through the first switch 1043 and the second switch 1044 to the first pixel electrode 1041 and the second pixel electrode 1042, respectively. The data signal is input, and at this time, the first pixel electrode 1041 and the second pixel electrode 1042 have the same potential. And, according to the requirement that the first pixel electrode 1041 and the second pixel electrode 1042 display an image, the first common voltage is applied to the first sub-common electrode 1111 on the second substrate 11 by the first common electrode driver to provide a first pixel. The electrode 1041 applies a first common voltage required for displaying an image, and applies a second common voltage to the second sub-common electrode 1121 through the second common electrode driver to provide a second portion required to match the second pixel electrode 1042 to display an image. Two common voltages. The display of the first pixel electrode 1041 and the second pixel electrode 1042 is driven by the cooperation of the charging scan line 101, the data line 103, and the first sub-common electrode 1111 and the second sub-common electrode 1121 on the second substrate 11. Subsequently, the input of the scan signal to the charge scan line 101 is stopped, and the scan signal is input to the discharge scan line 102 to control the third switch 1045 to be turned on. The output terminal of the third switching element 1045 is connected to the second pixel electrode 1042, and the output terminal is connected to the discharging capacitor 1046. When the third switch 1045 is turned on, the second pixel electrode 1042 and the discharging capacitor 1046 are electrically connected. The potential of the discharge capacitor 1046 is controlled according to the viewing angle requirement, for example, the potential of the discharge capacitor 1046 is lower than the potential of the second pixel electrode 1042, so that when the second pixel electrode 1042 and the discharge capacitor 1046 are electrically connected, the second pixel electrode 1042 The partial charge is transferred such that the potential of the second pixel electrode 1042 is lower than the potential of the first pixel electrode 1041, thereby causing a non-zero voltage difference between the first pixel electrode 1041 and the second pixel electrode 1042. The potentials of the first pixel electrode 1041 and the second pixel electrode 1042 are different, as shown in FIG. 4, so that the deflection of the liquid crystal molecules in the liquid crystal layer 103 corresponding to the first pixel electrode 1041 and the second pixel electrode 1042, respectively, is different. Therefore, it is possible to reduce the color difference at a large viewing angle and achieve a low color shift effect at a large viewing angle.

Further, according to the display requirements of different viewing angles, the common voltages that the first pixel electrode 1041 and the second pixel electrode 1042 need to cooperate when displaying an image may be the same or different, but pass through the first sub-common electrode 1111 of the present embodiment. And the second sub-common electrode 1121 can respectively provide the first pixel electrode 1041 and the second pixel electrode 1042 with an optimum common voltage that they need to match when displaying an image, instead of using the same common common electrode pair. The manner in which the pixel electrode and the second pixel electrode provide the same common voltage, thereby being able to better control the voltage difference between the first pixel electrode 1041 and the first sub-common electrode 1111 and the second pixel electrode 1042 and the first according to the viewing angle requirement The voltage difference between the two sub-common electrodes 112 is different, such that the deflection direction of the liquid crystal molecules corresponding to the first pixel electrode 1041 is different from the deflection direction of the liquid crystal molecules corresponding to the second pixel electrode 1042 to further improve the low color shift effect. In addition, the first pixel electrode 1041 and the second pixel electrode 1042 can obtain the optimal common voltage required for displaying the image, and can effectively reduce the charge residual of the first pixel electrode 1041 and the second pixel electrode 1042, thereby reducing image sticking. phenomenon.

The charge scan line 101, the discharge scan line 102, the first switch 1043, the second switch 1044, the third switch 1045, and the discharge capacitor 1046 of the present embodiment are both opaque between the first pixel electrode 1041 and the second pixel electrode 1042. The light region can thereby increase the aperture ratio of the liquid crystal display panel. In other embodiments, the charge scan line, the discharge scan line, and the switch may also be disposed in an opaque region between the pixel units. For example, for two adjacent pixel units along the column direction, the charge scan line, the discharge scan line, the three switches, and the discharge capacitor corresponding to the pixel unit are both located in the pixel unit and the previous pixel unit adjacent to the pixel unit. between.

In addition, the first switch 1043, the second switch 1044, and the third switch 1045 are thin film transistor devices, and the control end of the switch corresponds to the gate of the thin film transistor, and the input end of the switch corresponds to the source of the thin film transistor, and the output end of the switch Corresponding to the drain of the thin film transistor. Of course, in other embodiments, the three

switches

1043, 1045, and 1046 may also be control switches such as Darlington tubes and transistors.

In an alternative embodiment, the input end of the third switch may also be connected to the first pixel electrode, and the potential of the first pixel electrode is changed by the action of the discharge capacitor, thereby causing the first pixel electrode and the second pixel electrode to be There is a voltage difference that is not zero, and a low color shift effect can also be achieved.

In addition, in an alternative embodiment, the first pixel electrode and the second pixel electrode may also be arranged in a row direction. In this case, the length direction of the first sub-common electrode is a column direction, and each of the first sub-common electrodes and the first column of pixels The electrodes correspond to provide a first common voltage; the length direction of the second sub-common electrodes is also a column direction, and each of the second sub-common electrodes corresponds to a column of second pixel electrodes to provide a second common voltage. In addition, the second substrate may also include a plurality of independent first common electrodes and a plurality of independent second common electrodes, and the first common electrode and the second common electrode are independent of each other. At this time, each of the first common electrodes corresponds to one column or a row of first pixel electrodes (determined by the arrangement direction of the first pixel electrode and the second pixel electrode), and each of the first common electrodes is connected to one first common electrode driver; The second common electrodes correspond to one column or a row of second pixel electrodes, and each of the second common electrodes is connected to a second common electrode driver. It is also possible in the above manner to apply a corresponding common voltage to the first pixel electrode and the second pixel electrode separately.

In other alternative embodiments, the first common electrode and the second common electrode may also be electrically connected, such that the first common electrode and the second common electrode are electrically connected through a reasonable step-down circuit or a boosting circuit, so that Both can simultaneously obtain the first common voltage and the second common voltage, respectively. In this case, only one driver or one reference voltage source is required to apply the voltage signal. For example, a first common voltage is applied to the first common electrode by a drive circuit or a reference voltage source to provide an optimum first common voltage required to match the first pixel electrode to display an image. Assuming that the second common voltage required by the second pixel electrode is smaller than the first common voltage, the first common electrode and the second common electrode may be electrically connected through the voltage dividing resistor, such that when the driving circuit applies the first common to the first common electrode When the voltage is applied, the voltage of the first common voltage is reduced after being stepped down by the voltage dividing resistor, and the resistance value of the voltage dividing resistor is set according to the optimal second common voltage required for the second pixel electrode, thereby making the second common The electrode obtains a desired second common voltage to provide an optimum second common voltage required to match the second pixel electrode to display an image. In the above manner, it is also possible to apply respective common voltages to the first common electrode and the second common electrode, respectively, so that both the first pixel electrode and the second pixel electrode can obtain an optimum common voltage to be matched when displaying an image.

In the above embodiment, the discharge circuit is implemented by a discharge capacitor. Referring to FIG. 5, in another embodiment of the liquid crystal display panel of the present invention, the discharge circuit is implemented by two series capacitors, and the second basic structure is the same as the above embodiment. The structure of the second substrate is the same. The discharge circuit of the present embodiment includes a first capacitor 2046 and a second capacitor 2045. The input end of the third switch 2045 is connected to the second pixel electrode, and one end of the first capacitor 2046 is connected to the first pixel electrode 2041, and the other end of the first capacitor 2046 is connected to one end of the second capacitor 2047. The second capacitor 2047 The other end is connected to the third common electrode 205 on the first substrate 20. The output of the third switch 2045 is connected between the first capacitor 2046 and the second capacitor 2047.

When driving the liquid crystal display panel display, the charging scan line 201 inputs a scan signal to control the first switch 2043 and the second switch 2044 to be turned on, and the data line 203 passes through the first switch 2043 and the second switch 2044 to the first pixel electrode 2041 and The second pixel electrode 2042 inputs a data signal, and at this time, the potentials of the first pixel electrode 2041 and the second pixel electrode 2042 are the same. The driving method of the second substrate is the same as that of the above embodiment, and will not be described herein. Subsequently, the input of the scan signal to the charge scan line 201 is stopped, and the scan signal is input to the discharge scan line 202 to control the third switch 2045 to be turned on, thereby electrically connecting the second pixel electrode 2042 to the discharge circuit. The first capacitor 2046 and the second capacitor 2047 are connected in series with the first pixel electrode 2041. When the data line 203 supplies a voltage signal (ie, a data signal) to the first pixel electrode 2041, the voltage signal is also applied to the first capacitor. 2046 and a second capacitor 2047 formed in the branch. According to the circuit principle of capacitor series voltage division, the voltage between the first capacitor 2046 and the second capacitor 2047 is lower than the voltage input by the data line 203, that is, the voltage between the first capacitor 2046 and the second capacitor 2047 is lower than the first voltage. The voltage of one pixel electrode 2041, that is, the voltage between the first capacitor 2046 and the second capacitor 2047 is lower than the voltage of the second pixel electrode 2041, so that the partial charge of the second pixel electrode 2041 when the third switch 2045 is turned on The transfer occurs such that the potential of the second pixel electrode 2041 is lower than the potential of the first pixel electrode 2041, thereby causing the liquid crystal molecules respectively corresponding to the first pixel electrode 2041 and the second pixel electrode 2042 to have different deflection directions, thereby achieving low color. Partial effect.

In addition, the structure of the second substrate of the present embodiment is similar to that of the above embodiment, that is, including the first common electrode and the second common electrode that are independent of each other to respectively provide the first pixel electrode 2041 and the second pixel electrode 2042 to display an image. The optimal common voltage required for each time can further control the deflection of the corresponding liquid crystal molecules according to the viewing angle requirement, thereby further improving the low color shift effect at a large viewing angle, and at the same time helping to reduce image sticking.

In other alternative embodiments, the discharge circuit may also be a voltage dividing resistor, such that the input end of the third switch is connected to the first pixel electrode, the output end is connected to one end of the voltage dividing resistor, and the other end of the voltage dividing resistor is grounded. When the third switch is turned on, the first pixel electrode is electrically connected to the voltage dividing resistor, and the voltage of the first pixel electrode is decreased after being divided by the voltage dividing resistor, so that the first pixel electrode and the second pixel electrode are There is a voltage difference between zero.

The present invention also provides an embodiment of a liquid crystal display device comprising the liquid crystal display panel of any of the above embodiments.

The above is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the invention and the drawings are directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of the present invention.

Claims

A liquid crystal display panel, comprising: a first substrate, a second substrate, a first common electrode driver, a second common electrode driver, and a liquid crystal layer between the first substrate and the second substrate;

The first substrate includes a plurality of charging scan lines, a plurality of discharge scan lines, a plurality of data lines, and a plurality of pixel units arranged in rows and columns, each of the pixel units corresponding to one charging scan line, one discharge scan line, and one piece of data. line;

Each of the pixel units includes a first pixel electrode, a second pixel electrode, and first and second switches respectively acting on the first pixel electrode and the second pixel electrode, each of the pixel units further including a third a switch and a discharge circuit, each of the switches includes a control end, an input end, and an output end, wherein the control ends of the first switch and the second switch are connected to a charging scan line corresponding to the pixel unit, the first switch The input end of the second switch is connected to the data line corresponding to the pixel unit, the output end of the first switch is connected to the first pixel electrode, and the output end of the second switch and the second pixel electrode Connecting, the control end of the third switch is connected to the discharge scan line, the input end of the third switch is connected to the first pixel electrode or the second pixel electrode, and the output end of the third switch is connected Disconnecting the discharge circuit to form a preset voltage difference between the first pixel electrode and the second pixel electrode that is not zero when the first pixel electrode and the second pixel electrode are driven to be displayed;

The second substrate includes first and second common electrodes independent of each other, the first common electrode corresponding to the first pixel electrode to provide a first common voltage, the first common electrode driver and the a first common electrode connection for inputting the first common voltage to the first common electrode, and a second common electrode corresponding to the second pixel electrode to provide a second common voltage, the second common electrode a driver is coupled to the second common electrode to input the second common voltage to the second common electrode;

The first common electrode includes a plurality of first sub-common electrodes, and the second common electrode includes a plurality of second sub-common electrodes, and the first sub-common electrode and the second sub-common electrode are independent of each other. a length direction of each of the first sub-common electrodes is the same as an arrangement direction of a plurality of the first pixel electrodes disposed adjacent to each other such that each of the first sub-common electrodes and the row or columns are the first The pixel electrodes are corresponding to provide the first common voltage required to match the first pixel electrode to display an image, and the plurality of the first plurality of the first sub-common electrodes are disposed adjacent to each other The two pixel electrodes are arranged in the same direction such that each of the second sub-common electrodes corresponds to one row or one column of the second pixel electrodes to provide the first portion required to match the second pixel electrode to display an image Two common voltages.
The liquid crystal display panel according to claim 1, wherein

All of the first sub-common electrodes are electrically connected to a region of the second substrate corresponding to a periphery of the display region of the liquid crystal display panel, and all of the second sub-common electrodes correspond to the liquid crystal corresponding to the second substrate The area around the display area of the display panel is electrically connected.
The liquid crystal display panel according to claim 1, wherein

The first sub-common electrode and the second sub-common electrode are in a strip shape.
A liquid crystal display panel, comprising: a first substrate, a second substrate, and a liquid crystal layer between the first substrate and the second substrate;

The first substrate includes a plurality of charging scan lines, a plurality of discharge scan lines, a plurality of data lines, and a plurality of pixel units arranged in rows and columns, each of the pixel units corresponding to one charging scan line, one discharge scan line, and one piece of data. line;

Each of the pixel units includes a first pixel electrode, a second pixel electrode, and first and second switches respectively acting on the first pixel electrode and the second pixel electrode, each of the pixel units further including a third a switch and a discharge circuit, each of the switches includes a control end, an input end, and an output end, wherein the control ends of the first switch and the second switch are connected to a charging scan line corresponding to the pixel unit, the first switch The input end of the second switch is connected to the data line corresponding to the pixel unit, the output end of the first switch is connected to the first pixel electrode, and the output end of the second switch and the second pixel electrode Connecting, the control end of the third switch is connected to the discharge scan line, the input end of the third switch is connected to the first pixel electrode or the second pixel electrode, and the output end of the third switch is connected Disconnecting the discharge circuit to form a preset voltage difference between the first pixel electrode and the second pixel electrode that is not zero when the first pixel electrode and the second pixel electrode are driven to be displayed;

The second substrate includes a first common electrode and a second common electrode, the first common electrode corresponding to the first pixel electrode to provide a first common voltage, and the second common electrode and the second pixel The electrodes correspond to provide a second common voltage.
The liquid crystal display panel according to claim 4, wherein

The first common electrode and the second common electrode are independent of each other, the first common electrode includes a plurality of first sub-common electrodes, and the second common electrode includes a plurality of second sub-common electrodes, the first sub-common The electrode and the second sub-common electrode are independent of each other, and a length direction of each of the first sub-common electrodes is the same as an arrangement direction of a plurality of the first pixel electrodes disposed adjacent to each other, such that each of the a sub-common electrode corresponding to one row or column of the first pixel electrodes to provide a first common voltage required to match the first pixel electrode to display an image, and a length direction of each of the second sub-common electrodes Arranging directions of the plurality of the second pixel electrodes disposed adjacently in the same direction such that each of the second sub-common electrodes corresponds to one row or one column of the second pixel electrodes to provide a second pixel electrode The second common voltage required to display the image.
The liquid crystal display panel according to claim 5, wherein

All of the first sub-common electrodes are electrically connected to a region of the second substrate corresponding to a periphery of the display region of the liquid crystal display panel, and all of the second sub-common electrodes correspond to the liquid crystal corresponding to the second substrate The area around the display area of the display panel is electrically connected.
The liquid crystal display panel according to claim 5, wherein

The first sub-common electrode and the second sub-common electrode are in a strip shape.
The liquid crystal display panel according to claim 4, wherein

The liquid crystal display panel includes a first common electrode driver and a second common electrode driver, the first common electrode driver being connected to the first common electrode to input a first common voltage to the first common electrode, the first A second common electrode driver is coupled to the second common electrode to input a second common voltage to the second common electrode.
The liquid crystal display panel according to claim 4, wherein

The first substrate further includes a third common electrode, and the discharge circuit includes a first capacitor and a second capacitor, and the input end of the third switch and the first pixel electrode and the second pixel electrode When one pixel electrode is connected, one end of the first capacitor is connected to another pixel electrode, the other end of the first capacitor is connected to one end of the second capacitor, and the other end of the second capacitor is connected to the first a third common electrode of a substrate, an output end of the third switch is connected between the first capacitor and the second capacitor;

Inputting a scan signal to the charging scan line to control the first switch and the second switch to be turned on, inputting a data signal to the data line to drive the first pixel electrode and the second pixel electrode to display, and then stopping Inputting a scan signal to the charging scan line, inputting a scan signal to the discharge scan line to control conduction of the third switch, and causing the first pixel electrode and the first capacitor and the second capacitor to A preset voltage difference is formed between the second pixel electrodes.
The liquid crystal display panel according to claim 4, wherein

The first substrate further includes a third common electrode, the discharge circuit is a discharge capacitor, and an input end of the third switch is connected to the first pixel electrode or the second pixel electrode, and the third switch The output end is connected to one end of the discharge capacitor, and the other end of the discharge capacitor is connected to the third common electrode of the first substrate;

Inputting a scan signal to the charging scan line to control the first switch and the second switch to be turned on, inputting a data signal to the data line to drive the first pixel electrode and the second pixel electrode to display, and then stopping Inputting a scan signal to the charging scan line, inputting a scan signal to the discharge scan line to control conduction of the third switch, and controlling a size of the discharge capacitor such that the first pixel electrode and the second pixel electrode A preset voltage difference is formed between them.
The liquid crystal display panel according to claim 4, wherein

The charge scan line, the discharge scan line, the first switch, the second switch, the third switch, and the discharge circuit are both located between the first pixel electrode and the second pixel electrode.
The liquid crystal display panel of claim 4, comprising:

The first switch, the second switch, and the third switch are thin film transistors, and a control end of the switch corresponds to a gate of the thin film transistor, and an input end of the switch corresponds to a source of the thin film transistor. The output of the switch corresponds to the drain of the thin film transistor.
A liquid crystal display device, comprising: a liquid crystal display panel, the liquid crystal display panel comprising a first substrate, a second substrate, and a liquid crystal layer between the first substrate and the second substrate;

The first substrate includes a plurality of charging scan lines, a plurality of discharge scan lines, a plurality of data lines, and a plurality of pixel units arranged in rows and columns, each of the pixel units corresponding to one charging scan line, one discharge scan line, and one piece of data. line;

Each of the pixel units includes a first pixel electrode, a second pixel electrode, and first and second switches respectively acting on the first pixel electrode and the second pixel electrode, each of the pixel units further including a third a switch and a discharge circuit, each of the switches includes a control end, an input end, and an output end, wherein the control ends of the first switch and the second switch are connected to a charging scan line corresponding to the pixel unit, the first switch The input end of the second switch is connected to the data line corresponding to the pixel unit, the output end of the first switch is connected to the first pixel electrode, and the output end of the second switch and the second pixel electrode Connecting, the control end of the third switch is connected to the discharge scan line, the input end of the third switch is connected to the first pixel electrode or the second pixel electrode, and the output end of the third switch is connected Disconnecting the discharge circuit to form a preset voltage difference between the first pixel electrode and the second pixel electrode that is not zero when the first pixel electrode and the second pixel electrode are driven to be displayed;

The second substrate includes a first common electrode and a second common electrode, the first common electrode corresponding to the first pixel electrode to provide a first common voltage, and the second common electrode and the second pixel The electrodes correspond to provide a second common voltage.
A liquid crystal display device according to claim 13, wherein

The first common electrode and the second common electrode are independent of each other, the first common electrode includes a plurality of first sub-common electrodes, and the second common electrode includes a plurality of second sub-common electrodes, the first sub-common The electrode and the second sub-common electrode are independent of each other, and a length direction of each of the first sub-common electrodes is the same as an arrangement direction of a plurality of the first pixel electrodes disposed adjacent to each other, such that each of the a sub-common electrode corresponding to one row or column of the first pixel electrodes to provide a first common voltage required to match the first pixel electrode to display an image, and a length direction of each of the second sub-common electrodes Arranging directions of the plurality of the second pixel electrodes disposed adjacently in the same direction such that each of the second sub-common electrodes corresponds to one row or one column of the second pixel electrodes to provide a second pixel electrode The second common voltage required to display the image.
The liquid crystal display device according to claim 14, wherein

All of the first sub-common electrodes are electrically connected to a region of the second substrate corresponding to a periphery of the display region of the liquid crystal display panel, and all of the second sub-common electrodes correspond to the liquid crystal corresponding to the second substrate The area around the display area of the display panel is electrically connected.
The liquid crystal display device according to claim 14, wherein

The first sub-common electrode and the second sub-common electrode are in a strip shape.
A liquid crystal display device according to claim 13, wherein

The liquid crystal display panel includes a first common electrode driver and a second common electrode driver, the first common electrode driver being connected to the first common electrode to input a first common voltage to the first common electrode, the first A second common electrode driver is coupled to the second common electrode to input a second common voltage to the second common electrode.
The liquid crystal display device according to claim 13, wherein

The first substrate further includes a third common electrode, and the discharge circuit includes a first capacitor and a second capacitor, and the input end of the third switch and the first pixel electrode and the second pixel electrode When one pixel electrode is connected, one end of the first capacitor is connected to another pixel electrode, the other end of the first capacitor is connected to one end of the second capacitor, and the other end of the second capacitor is connected to the first a third common electrode of a substrate, an output end of the third switch is connected between the first capacitor and the second capacitor;

Inputting a scan signal to the charging scan line to control the first switch and the second switch to be turned on, inputting a data signal to the data line to drive the first pixel electrode and the second pixel electrode to display, and then stopping Inputting a scan signal to the charging scan line, inputting a scan signal to the discharge scan line to control conduction of the third switch, and causing the first pixel electrode and the first capacitor and the second capacitor to A preset voltage difference is formed between the second pixel electrodes.
The liquid crystal display device according to claim 13, wherein

The first substrate further includes a third common electrode, the discharge circuit is a discharge capacitor, and an input end of the third switch is connected to the first pixel electrode or the second pixel electrode, and the third switch The output end is connected to one end of the discharge capacitor, and the other end of the discharge capacitor is connected to the third common electrode of the first substrate;

Inputting a scan signal to the charging scan line to control the first switch and the second switch to be turned on, inputting a data signal to the data line to drive the first pixel electrode and the second pixel electrode to display, and then stopping Inputting a scan signal to the charging scan line, inputting a scan signal to the discharge scan line to control conduction of the third switch, and controlling a size of the discharge capacitor such that the first pixel electrode and the second pixel electrode A preset voltage difference is formed between them.
The liquid crystal display device according to claim 13, wherein

The charge scan line, the discharge scan line, the first switch, the second switch, the third switch, and the discharge circuit are both located between the first pixel electrode and the second pixel electrode.