Liquid crystal display panel

Abstract

The present invention relates to a liquid crystal display panel, which comprises a color filter substrate, a TFT array substrate arranged opposite to the color filter substrate, and liquid crystal located between the color filter substrate and the TFT array substrate, wherein the color filter substrate comprises a base substrate and a black matrix layer and a color resistance layer sequentially formed on the base substrate; an ITO conductive layer is arranged on the side of the color resistance layer, and the ITO conductive layer is divided to form a plurality of touch sensing points; a touch line of the TFT array substrate passes through an array pixel area, is connected to the ITO conductive layer in a vertical direction of the substrate, and is connected to a common electrode to form a sheet, and the above technical solution can not only greatly reduce the influence of the coupling of electrodes on the TFT side on the touch point, but also make the distance to the gesture touch closer, the change of the induction capacitance more obvious, and enable the IC to feedback the touch position more accurately, and is less likely to have the problem of abnormal touch error.

Description

Technical Field

[0001] The present invention relates to the field of liquid crystal display, and in particular to a liquid crystal display panel. Background Art

[0002] Recently, FFS LCD panels have been widely used, and the demand for functions has also increased. In addition to high penetration and high resolution, privacy and anti-peeping functions are also of particular concern to users. o ), if the anti-peeping function is to be achieved, a layer of anti-peeping film with a narrow viewing angle is currently mostly pasted on the display screen, which has the following disadvantages: first, the cost and thickness of the display need to be increased; second, the contrast and brightness of the display will be greatly reduced; third, the viewing angle cannot be adjusted; fourth, the touch sensitivity of the display is reduced. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present invention provides a liquid crystal display panel with improved touch sensitivity.

[0004] A liquid crystal display panel of the present invention adopts the following technical solution: it comprises a color filter substrate, a TFT array substrate arranged opposite to the color filter substrate, and a liquid crystal located between the color filter substrate and the TFT array substrate;

[0005] The color filter substrate comprises a substrate and a black matrix layer and a color resist layer sequentially formed on the substrate;

[0006] The TFT array substrate comprises:

[0007] substrate;

[0008] A plurality of data lines are arranged on the substrate and extend along a first direction;

[0009] A plurality of scanning lines are provided on the substrate and extend along a second direction, wherein the second direction is different from the first direction;

[0010] A plurality of touch lines are provided on the substrate and extend in a first direction to overlap with the shadows of the data lines;

[0011] The array pixel area is formed by a plurality of the data lines and a plurality of the scan lines interlacedly surrounding pixel units, and each pixel unit includes:

[0012] A pixel electrode, wherein the pixel electrode has a plurality of slits, and the slits have a turning point;

[0013] A thin film transistor, comprising a gate, a source and a drain, wherein the gate is electrically coupled to the scan line, the source is electrically coupled to the data line, and the drain is electrically coupled to the pixel electrode;

[0014] A common electrode, disposed on the thin film transistor;

[0015] An insulating layer, disposed between the common electrode and the pixel electrode, having a lap hole for the pixel electrode and the drain electrode of the thin film transistor;

[0016] An ITO conductive layer is disposed on the color resist layer side, the ITO conductive layer is divided to form a plurality of touch sensing points, the touch line passes through the array pixel area, and is connected to the ITO conductive layer in a vertical direction of the substrate, and the common electrode is connected into a sheet.

[0017] Furthermore, the ITO conductive layer is formed by connecting all the ITO conductive sheets corresponding to the pixel electrodes.

[0018] Furthermore, the ITO conductive sheet has a plurality of slits overlapping with the shadows of the pixel electrodes.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Adding a new ITO conductive layer above the color resist layer on the color film substrate side and dividing the ITO conductive layer into several touch points can not only greatly reduce the influence of the touch points on the coupling of the electrodes on the TFT side, but also make the distance to the gesture touch closer, and the change of the sensing capacitance is more obvious, which can make the IC more accurately feedback the touch position and is less likely to have abnormal touch error.

[0021] 2. Connect the common electrodes of the TFT array substrate that were originally divided into touch points into pieces to improve the uniformity of the common electrode Vcom level;

[0022] 3. The original touch metal layer and the insulating layer connected to the common electrode can be removed, which reduces the manufacturing process of the liquid crystal display panel and reduces the cost of the liquid crystal display panel;

[0023] 4. The ITO conductive layer is formed by connecting all the ITO conductive sheets corresponding to the pixel electrodes, and has a plurality of slits overlapping with the shadows of the pixel electrodes. The deflection direction of the upper liquid crystal can be controlled by voltage to change the viewing angle range. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings described herein are used to provide a further understanding of the present application, in which:

[0025] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0026] Figure 2 A perspective view of a color filter substrate according to an embodiment of the present invention;

[0027] Figure 3 A perspective view of a TFT array substrate according to an embodiment of the present invention;

[0028] Figure 4 It is a cross-sectional view of the thin film transistor side of the TFT array substrate according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] See also Figure 1-Figure 4 As shown in one of the embodiments, a liquid crystal display panel includes a color filter substrate 1, a TFT array substrate 3 arranged opposite to the color filter substrate, and a liquid crystal 2 located between the color filter substrate 1 and the TFT array substrate 3;

[0030] The color filter substrate 1 comprises a base substrate 11 and a black matrix layer 12 and a color resist layer 13 sequentially formed on the base substrate 11;

[0031] The TFT array substrate 3 comprises:

[0032] substrate;

[0033] A plurality of data lines 31 are provided on the substrate and extend along a first direction;

[0034] A plurality of scanning lines 32 are provided on the substrate and extend along a second direction, wherein the second direction is different from the first direction;

[0035] A plurality of touch lines are provided on the substrate and extend along the first direction to overlap with the shadows of the data lines 31;

[0036] The array pixel area is formed by a plurality of the data lines 31 and a plurality of the scan lines 32 interlacedly surrounding pixel units, and each pixel unit includes:

[0037] The pixel electrode 33 has a plurality of slits, and each slit has a turning point;

[0038] The thin film transistor 34 has a gate 341, a source 342 and a drain 343, wherein the gate 341 is electrically coupled to the scan line 32, the source 342 is electrically coupled to the data line 31, and the drain 343 is electrically coupled to the pixel electrode 331;

[0039] A common electrode 35, provided on the thin film transistor 34;

[0040] The insulating layer 36 is provided between the common electrode 35 and the pixel electrode 33 and has a connection hole between the pixel electrode 33 and the drain electrode 343 of the thin film transistor 34;

[0041] An ITO conductive layer 14 is disposed on the side of the color resist layer 13. The ITO conductive layer 14 is divided into a plurality of touch sensing points. The touch line passes through the array pixel area and is connected to the ITO conductive layer 14 in the vertical direction of the substrate. The common electrode 35 is connected into a sheet.

[0042] Furthermore, the ITO conductive layer 14 is formed by connecting all the ITO conductive sheets corresponding to the pixel electrodes 33 .

[0043] Furthermore, the ITO conductive sheet has a plurality of slits that overlap with the shadows of the pixel electrodes 33 .

[0044] Working principle of the present invention:

[0045] An ITO conductive layer 14 is added to the color resist layer on the color filter substrate 1 side, and the ITO conductive layer 14 is divided into several touch points. Then the common electrode 35 originally divided into the touch points of the TFT array substrate 3 is connected into a piece, and the insulating layer originally used as the touch metal layer and the insulating layer connected to the common electrode 35 are removed. This can not only greatly reduce the influence of the touch point on the coupling of the electrodes on the TFT array substrate 3 side, but also make the distance to the gesture touch closer, and the change of the induction capacitance is more obvious, so that the IC can feedback the touch position more accurately, and it is less likely to have the problem of abnormal touch error.

[0046] Since the liquid crystal 2 has a birefringent property, the light from the backlight source will generate light paths of different directions and intensities when passing through the liquid crystal 2. The ITO conductive layer 14 is designed to correspond to the shape of each pixel electrode 33 so that it has a plurality of slits overlapping with the shadows of the pixel electrodes 33. By adjusting the voltage of the ITO conductive layer 14, the electric field strength between the common electrode 31 on the side of the TFT array substrate 3 is reduced, so that the deflection angle of the liquid crystal is reduced, thereby controlling the intensity of the lateral light output, reducing the visible range and achieving the anti-peeping function.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid crystal display panel, comprising a color filter substrate, a TFT array substrate arranged opposite to the color filter substrate, and a liquid crystal located between the color filter substrate and the TFT array substrate; The color filter substrate comprises a substrate and a black matrix layer and a color resist layer sequentially formed on the substrate; The TFT array substrate comprises: substrate; A plurality of data lines are arranged on the substrate and extend along a first direction; A plurality of scanning lines are provided on the substrate and extend along a second direction, wherein the second direction is different from the first direction; A plurality of touch lines are provided on the substrate and extend in a first direction to overlap with the shadows of the data lines; The array pixel area is formed by a plurality of the data lines and a plurality of the scan lines interlacedly surrounding pixel units, and each pixel unit includes: A pixel electrode, wherein the pixel electrode has a plurality of slits, and the slits have a turning point; A thin film transistor, comprising a gate, a source and a drain, wherein the gate is electrically coupled to the scan line, the source is electrically coupled to the data line, and the drain is electrically coupled to the pixel electrode; A common electrode, disposed on the thin film transistor; An insulating layer, disposed between the common electrode and the pixel electrode, having a lap hole for the pixel electrode and the drain electrode of the thin film transistor; The invention is characterized in that: an ITO conductive layer is provided on the side of the color resist layer, the ITO conductive layer is divided to form a plurality of touch sensing points, the touch line passes through the array pixel area, and is connected to the ITO conductive layer in the vertical direction of the substrate, and the common electrode is connected into a sheet; The ITO conductive layer is formed by connecting all the ITO conductive sheets corresponding to the pixel electrodes; The ITO conductive sheet has a plurality of slits overlapping with the shadows of the pixel electrodes.

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