Liquid crystal display panel and liquid crystal display device

Abstract

This application provides a liquid crystal display panel and a liquid crystal display device. The liquid crystal display panel includes: a thin-film transistor array and a filter disposed opposite each other in a first direction; a plurality of pixels disposed on the side of the filter facing the thin-film transistor array; the plurality of pixels being adjacent in a second direction, and a first blocking portion or a second blocking portion being disposed between adjacent pixels; the second direction being perpendicular to the first direction; a liquid crystal unit being located between the plurality of pixels and the thin-film transistor array in the first direction; the liquid crystal unit including liquid crystal and ionic impurities; a first electrode and a second electrode being adjacent to the liquid crystal unit in the first direction, and the first electrode and the second electrode being adjacent in the second direction; the projection of the first blocking portion in the first direction can cover the first electrode, and the projection of the second blocking portion in the first direction can cover the second electrode; the first electrode and the second electrode have different polarities to improve the image retention phenomenon of the liquid crystal display panel.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a liquid crystal display panel and a liquid crystal display device. Background Technology

[0002] Image sticking (IS), also known as image retention, refers to the phenomenon where, after a display panel has been displaying the same static image for an extended period of time, if the content displayed on the panel is changed, the original image may remain on the screen.

[0003] In related technologies, for liquid crystal display panels, since ionic impurities are inevitably present in the liquid crystal cells of the liquid crystal display panel, the liquid crystal display panel is prone to image retention when displaying images, which leads to poor display effect of the liquid crystal display panel. Utility Model Content

[0004] This application provides a liquid crystal display panel and a liquid crystal display device, which aims to reduce the image retention phenomenon of the liquid crystal display panel and improve the display effect of the liquid crystal display panel.

[0005] In a first aspect, this application provides a liquid crystal display panel, the liquid crystal display panel comprising: A thin-film transistor array and a filter are arranged opposite to each other in a first direction; Multiple pixels are disposed on the side of the filter facing the thin-film transistor array; the multiple pixels are adjacent in a second direction, and a first blocking portion or a second blocking portion is disposed between adjacent pixels; the second direction is perpendicular to the first direction; A liquid crystal cell, the liquid crystal cell being located in a first direction between the plurality of pixels and the thin-film transistor array; the liquid crystal cell comprising liquid crystal and ionic impurities; A first electrode and a second electrode are adjacent to the liquid crystal cell in a first direction and adjacent to each other in a second direction; the projection of the first shielding portion in the first direction can cover the first electrode, and the projection of the second shielding portion in the first direction can cover the second electrode; the first electrode and the second electrode have different polarities.

[0006] Secondly, this application provides a liquid crystal display device, which includes a liquid crystal display panel as described above.

[0007] A first electrode and a second electrode are disposed on a liquid crystal display panel. The first electrode and the second electrode are adjacent to the liquid crystal cell in a first direction and adjacent to each other in a second direction. Given that the projection of a first blocking portion in the first direction covers the first electrode, and the projection of a second blocking portion in the first direction covers the second electrode, the positional relationships between the first electrode and the second electrode and the pixel can be determined to correspond to the positional relationships between the first blocking portion and the second blocking portion and the pixel. Since the first electrode and the second electrode have different polarities, a stable DC electric field can be formed between them. Ionic impurities included in the liquid crystal cell can move towards the poles of the DC electric field under the influence of the DC electric field, thereby reducing ionic impurities located in the pixel opening region, reducing image retention in the liquid crystal display panel, and thus improving the display effect of the liquid crystal display panel. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 a to Figure 1 b is a schematic diagram of the image retention phenomenon in the liquid crystal display panel involved in the related technology; Figure 2 This is a schematic diagram of the thin-film transistor array structure of a liquid crystal display panel involved in the related technology; Figure 3 This is a schematic diagram of the structure of the filter for a liquid crystal display panel involved in the related technology; Figure 4 This is a schematic diagram of the structure of a liquid crystal display panel provided in an embodiment of this application; Figure 5 This is a schematic diagram showing the connection between the first electrode and the second electrode and the control panel of an external switch according to an embodiment of this application; Figure 6 This is a schematic diagram showing the distribution of ionic impurities in a liquid crystal display panel according to an embodiment of this application; Figure 7 for Figure 6 A schematic diagram illustrating the movement of ionic impurities in the liquid crystal display panel involved; Figure 8 This is a schematic diagram of the distribution of ionic impurities in a liquid crystal display panel according to another embodiment of this application; Figure 9 for Figure 8 A schematic diagram illustrating the movement of ionic impurities in the liquid crystal display panel involved; Figure 10 A schematic diagram of the structure of a liquid crystal display device provided in one embodiment of this application.

[0010] Explanation of reference numerals in the attached drawings: 10, Liquid crystal display device; 100, Liquid crystal display panel; 110, Thin film transistor array; 111, First recess; 112, Second recess; 113, Passivation layer; 120, Filter; 121, Third recess; 122, Fourth recess; 130, Pixel; 140, First blocking portion; 150, Second blocking portion; 160, Liquid crystal cell; 161, Liquid crystal; 162, Ionic impurity; 170, First electrode; 180, Second electrode. Detailed Implementation

[0011] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0012] The flowchart shown in the attached diagram is for illustrative purposes only and does not necessarily include all content and operations / steps, nor does it necessarily have to be performed in the order described. For example, some operations / steps can be broken down, combined, or partially merged, so the actual execution order may change depending on the actual situation.

[0013] In related technologies, for liquid crystal display panels that control pixel voltages via thin-film transistors (TFTs) and thus alter the liquid crystal alignment, image retention exists to varying degrees. For liquid crystal display panels in in-plane switching (IPS) display mode, due to their unique planar electric field structure, IPS display panels tend to exhibit more pronounced image retention compared to Twisted Nematic (TN) display panels or other display modes.

[0014] Two coexisting factors essential for image retention include: ① the presence of a direct current (DC) bias voltage in the driving process, also known as DC bias; and ② the presence of ionic impurities within the display panel. Due to limitations in the pixel structure or manufacturing technology of liquid crystal display (LCD) panels, DC bias can easily occur in the pixel opening areas, attracting ionic impurities within the panel. This leads to residual DC bias at locations of AC drive asymmetry. When different images are displayed on the LCD panel, the liquid crystals in the liquid crystal cells are affected by these ionic impurities and cannot maintain their original alignment, resulting in image retention, i.e., image retention. Figure 1 a to Figure 1 As shown in b.

[0015] like Figure 2 As shown, in related technologies, the thin-film transistor array includes data lines adjacent to both the common electrode and the pixel electrode. When the data lines charge the pixel electrode, an electric field is formed between the pixel electrode and the common electrode, thereby driving the liquid crystal in the liquid crystal display panel to rotate. Figure 3 As shown, the vertical projection of the Data line corresponds to the position of the Black Matrix (BM) in the filter. The BM serves to block and shield light. Due to the unavoidable ionic impurities in the liquid crystal contained in the liquid crystal panel, image retention is prone to occur when the liquid crystal panel displays an image. Furthermore, in related technologies, to ensure no light leakage, the horizontal dimension of the BM corresponding to the vertical projection of the Data line in the liquid crystal panel, such as its width, is generally above 8 micrometers, resulting in a low pixel aperture ratio in the liquid crystal panel.

[0016] Therefore, it is urgent to reduce the image retention phenomenon of LCD panels in order to improve the display effect of LCD panels.

[0017] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0018] Please see Figure 4 , Figure 4 This is a schematic diagram of the structure of a liquid crystal display panel 100 provided in an embodiment of this application.

[0019] like Figure 4As shown, the liquid crystal display panel 100 includes: a thin-film transistor array 110 and a light filter 120 disposed opposite each other in a first direction; a plurality of pixels 130, the pixels 130 being disposed on the side of the light filter 120 facing the thin-film transistor array 110; the plurality of pixels 130 being adjacent in a second light direction, and a first blocking portion 140 or a second blocking portion 150 being disposed between adjacent pixels 130; the second direction being perpendicular to the first direction; and a liquid crystal unit 160, the liquid crystal unit 160 being located in the first direction between the plurality of pixels 130 and the thin-film transistor array 110. Between 10; the liquid crystal cell 160 includes liquid crystal 161 and ionic impurity 162; a first electrode 170 and a second electrode 180, the first electrode 170 and the second electrode 180 being adjacent to the liquid crystal cell 160 in a first direction, and the first electrode 170 and the second electrode 180 being adjacent to each other in a second direction; the projection of the first shielding portion 140 in the first direction can cover the first electrode 170, and the projection of the second shielding portion 150 in the first direction can cover the second electrode 180; the first electrode 170 and the second electrode 180 have different polarities.

[0020] For example, the first direction may include a vertical direction, and the second direction may include a horizontal direction, thus the second direction is perpendicular to the first direction. Of course, it is not limited to this; the first direction may also include a horizontal direction, and the second direction may also include a vertical direction, thus the second direction is perpendicular to the first direction.

[0021] If the thin-film transistor array 110 and the filter 120 are arranged opposite to each other in the first direction, the space between the thin-film transistor array 110 and the filter 120 in the first direction in the liquid crystal display panel 100 can be used to set the pixel 130, the liquid crystal unit 160, the first electrode 170 and the second electrode 180.

[0022] Pixel 130 is disposed on filter 120, and pixel 130 is disposed on the side of filter 120 facing thin film transistor array 110. Liquid crystal display panel 100 may include a plurality of pixels 130. The plurality of pixels 130 are adjacent in a second direction, and there is a gap between adjacent pixels 130. The gap between adjacent pixels 130 can be used to set a first blocking portion 140 or a second blocking portion 150, so one of the first blocking portion 140 and the second blocking portion 150 is provided between adjacent pixels 130. The first blocking portion 140 and the second blocking portion 150 may include a black matrix (BM). Taking a plurality of pixels 130 including sequentially adjacent pixels 1, 2, 3 and 4 as an example, a first blocking portion 140 may be provided between pixels 1 and 2, a second blocking portion 150 may be provided between pixels 2 and 3, a first blocking portion 140 may be provided between pixels 3 and 4, and so on.

[0023] The liquid crystal cell 160 is located in a first direction between the plurality of pixels 130 and the thin-film transistor array 110. The liquid crystal cell 160 includes liquid crystal 161 and ionic impurities 162.

[0024] The first electrode 170 and the second electrode 180 are adjacent to the liquid crystal cell 160 in the first direction, and are adjacent to each other in the second direction. Since the projection of the first blocking portion 140 in the first direction can cover the first electrode 170, and the projection of the second blocking portion 150 in the second direction can cover the second electrode 180, the positional relationship between the first electrode 170 and the second electrode 180 and the pixel 130 corresponds to the positional relationship between the first blocking portion 140 and the second blocking portion 150 and the pixel 130. Taking a plurality of pixels 130 including sequentially adjacent pixels 1, 2, 3, and 4 as an example. The projection of the first blocking portion 140 between pixels 1 and 2 in the first direction can cover one first electrode 170, the projection of the second blocking portion 150 between pixels 2 and 3 in the first direction can cover one second electrode 180, the projection of the first blocking portion 140 between pixels 3 and 4 in the first direction can cover another second electrode 180, and so on.

[0025] For example, the polarity of the first electrode 170 and the second electrode 180 is determined according to the DC signals connected to each of the first electrode 170 and the second electrode 180. When the first electrode 170 and the second electrode 180 are connected to DC signals of opposite polarity, the polarities of the first electrode 170 and the second electrode 180 are different, such as the first electrode 170 and the second electrode 180 being connected to DC signals of opposite polarity as positive and negative poles.

[0026] The DC signals connected to the first electrode 170 and the second electrode 180 can each be individually controlled by an external switch. When the external switch controls the DC signal to be turned on, the first electrode 170 and the second electrode 180 can have different polarities, so adjacent first electrodes 170 and second electrodes 180 in the second direction can form a stable DC electric field between corresponding pixels 130. Ionic impurities 162 in the liquid crystal cell 160 can move towards the two poles of the DC electric field under the action of the DC electric field, that is, towards the first electrode 170 or the second electrode 180. When the external switch controls the DC signal to be turned off, the first electrode 170 and the second electrode 180 do not have polarity.

[0027] like Figure 5As shown, the first electrode 170 and the second electrode 180 can be connected to an external switch control panel to control positive and negative DC signals via an external switch, making the polarities of the first electrode 170 and the second electrode 180 different, thereby forming a DC electric field between the first electrode 170 and the second electrode 180. When the DC electric field is turned on, the control panel can be turned off, allowing the ionic impurity 162 to move to the non-opening area of ​​the pixel 130; when the DC electric field is turned off, the control panel can be turned on normally, so that the electric field of the pixel 130 is not affected and the display is normal.

[0028] Since the projection of the first blocking portion 140 in the first direction can cover the first electrode 170, and the projection of the second blocking portion 150 in the first direction can cover the second electrode 180, and the first blocking portion 140 or the second blocking portion 150 is provided between adjacent pixels 130, the first electrode 170 and the second electrode 180 can be located in areas other than the opening area of ​​the pixel 130, i.e., non-opening areas. When the ionic impurity 162 moves towards the first electrode 170 or the second electrode 180, the ionic impurity 162 can move from the opening area of ​​the pixel 130 to the non-opening area, thereby reducing the ionic impurity 162 located in the opening area of ​​the pixel 130, reducing the image retention phenomenon of the liquid crystal display panel 100, and thus improving the display effect of the liquid crystal display panel 100.

[0029] In some embodiments, the first electrode 170 and the second electrode 180 are disposed on the side of the thin-film transistor array 110 facing the filter 120.

[0030] like Figure 6 As shown, the first electrode 170 and the second electrode 180 are disposed on the thin-film transistor array 110, and the first electrode 170 and the second electrode 180 are disposed on the side of the thin-film transistor array 110 facing the filter 120.

[0031] Since the first electrode 170 and the second electrode 180 are arranged adjacent to the liquid crystal cell 160 in the first direction and adjacent to each other in the second direction, a stable DC electric field can be formed between the corresponding pixels 130 when the polarities of the first electrode 170 and the second electrode 180 are different. Ionic impurities 162 in the liquid crystal cell 160 can move towards either pole of the DC electric field under the influence of the DC electric field, i.e., towards the first electrode 170 or the second electrode 180. When the ionic impurities 162 move towards the first electrode 170 or the second electrode 180, they can move from the aperture region of the pixel 130 to the non-aperture region, thereby reducing the number of ionic impurities 162 located in the aperture region of the pixel 130, reducing the image retention phenomenon of the liquid crystal display panel 100, and thus improving the display effect of the liquid crystal display panel 100.

[0032] In some embodiments, the thin-film transistor array 110 has a first recess 111 and a second recess 112 formed on the side facing the filter 120. The first recess 111 is located between the first electrode 170 and the first shielding portion 140 in a first direction, and the second recess 112 is located between the second electrode 180 and the second shielding portion 150 in a first direction.

[0033] like Figure 6 As shown, the thin-film transistor array 110 has a plurality of recesses formed on the side facing the filter 120. The recesses can be at least one of grooves, channels, etc., on the thin-film transistor array 110. If a recess exists located between the first electrode 170 and the first shielding portion 140 in the first direction, it can be identified as a first recess 111. If a recess exists located between the second electrode 180 and the second shielding portion 150 in the first direction, it can be identified as a second recess 112.

[0034] When the first recess 111 is located between the first electrode 170 and the first shielding portion 140 in the first direction, and the second recess 112 is located between the second electrode 180 and the second shielding portion 150 in the first direction, since the liquid crystal cell 160 is located between the plurality of pixels 130 and the thin film transistor array 110 in the first direction, the first recess 111 can be located between the liquid crystal cell 160 and the first electrode 170 in the first direction, and the second recess 112 can be located between the liquid crystal cell 160 and the second electrode 180 in the first direction.

[0035] For example, if the projection of the first occluding portion 140 in the first direction can cover the first recessed portion 111, and the projection of the second occluding portion 150 in the first direction can cover the second recessed portion 112, then the first recessed portion 111 and the second recessed portion 112 can be located in the non-opening area of ​​the pixel 130.

[0036] When the first electrode 170 and the second electrode 180 have different polarities, a stable DC electric field can be formed between the corresponding pixels 130. Ionic impurities 162 in the liquid crystal cell 160 can move towards either pole of the DC electric field under its influence, i.e., towards the first electrode 170 or the second electrode 180. Correspondingly, under the influence of the DC electric field between the first electrode 170 and the second electrode 180, ionic impurities 162 in the liquid crystal cell 160 can enter at least one of the first recess 111 and the second recess 112. The first recess 111 and the second recess 112 can restrict the movement of the ionic impurities 162, thereby working in conjunction with the first electrode 170 and the second electrode 180 to reduce the image retention phenomenon of the liquid crystal display panel 100 and improve the display effect of the liquid crystal display panel 100.

[0037] like Figure 6 As shown, when the first electrode 170 and the second electrode 180 are not polar, the ionic impurities 162 in the liquid crystal cell 160 are randomly distributed in the liquid crystal 161 within the liquid crystal cell 160. When the electric field of the pixel 130 in the liquid crystal display panel 100 changes, the liquid crystal cell 160 is driven by the electric field to rotate. However, due to the presence of the ionic impurities 162, the rotation of the liquid crystal 161 deviates from the designed angle, resulting in image retention.

[0038] like Figure 7As shown, when the first electrode 170 and the second electrode 180 change from having no polarity to having different polarities, a stable DC electric field can be formed between the first electrode 170 and the second electrode 180. Ionic impurities 162 in the liquid crystal cell 160 can move towards either pole of the DC electric field under the influence of the DC electric field, such as towards at least one of the first electrode 170 and the second electrode 180. Accordingly, if ionic impurities 162 move towards the first electrode 170, they can accumulate in the first recess 111. If ionic impurities 162 move towards the second electrode 180, they can accumulate in the second recess 112. Since the first recess 111 and the second recess 112 have a certain depth, when the first electrode 170 and the second electrode 180 change from having different polarities to having no polarity, the ionic impurities 162 accumulated in the first recess 111 and the second recess 112 will be blocked and restricted by the sidewalls of the respective recesses, making it difficult for them to escape into the opening area of ​​the pixel 130. Furthermore, since the first recess 111 and the second recess 112 are located in the non-opening area, the influence of the ionic impurities 162 accumulated in the first recess 111 and the second recess 112 on the rotation of the liquid crystal 161 can be greatly reduced, thereby effectively improving the image retention problem of the liquid crystal display panel 100 and enhancing the display effect of the liquid crystal display panel 100.

[0039] In some embodiments, the thin-film transistor array 110 includes a passivation layer 113; a first electrode 170 and a second electrode 180 are located inside the passivation layer 113, a first recess 111 is disposed on the side of the passivation layer 113 facing the first shielding portion 140, and a second recess 112 is disposed on the side of the passivation layer 113 facing the second shielding portion 150.

[0040] The passivation layer 113 may include at least PAS2. However, it is not limited to this; the passivation layer 113 may include both PAS1 and PAS2.

[0041] like Figure 6 as well as Figure 7 As shown, the first electrode 170 and the second electrode 180 are located inside the passivation layer 113. For example, the first electrode 170 and the second electrode 180 are located inside PAS2.

[0042] like Figure 6 as well as Figure 7As shown, a first recess 111 is provided on the side of the passivation layer 113 facing the first shielding portion 140, such as PAS2 facing the first shielding portion 140. A second recess 112 is provided on the side of the passivation layer 113 facing the second shielding portion 150, such as PAS2 facing the second shielding portion 150.

[0043] Based on this, both the first recess 111 and the second recess 112 can be located in the non-aperture area of ​​the pixel 130. Therefore, when the polarities of the first electrode 170 and the second electrode 180 are different, the first recess 111 and the second recess 112 can work together with the first electrode 170 and the second electrode 180 to reduce the image retention phenomenon of the liquid crystal display panel 100, thereby improving the display effect of the liquid crystal display panel 100. Correspondingly, when the first electrode 170 and the second electrode 180 are not polarized, the first recess 111 and the second recess 112 can restrict the movement of ionic impurities 162 accumulated in the first recess 111 and the second recess 112, thus preventing the ionic impurities 162 from re-moving to the aperture area of ​​the pixel 130. This helps to continuously improve the image retention problem of the liquid crystal display panel 100, thereby enhancing the display effect of the liquid crystal display panel 100.

[0044] In some embodiments, the first electrode 170 and the second electrode 180 are made of metal.

[0045] For example, the first electrode 170 and the second electrode 180 are made of M3 metal.

[0046] like Figure 6 as well as Figure 7 As shown, when the first electrode 170 and the second electrode 180 are disposed on the side of the thin-film transistor array 110 facing the filter 120, an M3 metal film layer can be added to the first shielding portion 140 at the corresponding position on the thin-film transistor array 110 to serve as the first electrode 170, and an M3 metal film layer can be added to the second shielding portion 150 at the corresponding position on the thin-film transistor array 110 to serve as the second electrode 180. The first electrode 170 and the second electrode 180 can be located above the data lines in the thin-film transistor array 110 in the first direction, which is not limited here.

[0047] The first electrode 170 and the second electrode 180 can be controlled independently by an external switch. The M3 metal film layer adjacent to the pixel 130 in the second direction is connected to opposite DC signals as positive and negative poles. When the polarities of the first electrode 170 and the second electrode 180 are opposite, the adjacent M3 metal film layers form a stable DC electric field between the pixels 130, which can drive the ionic impurities 162 in the liquid crystal cell 160 to move towards the two poles of the DC electric field, thereby causing the ionic impurities 162 to move from the aperture area of ​​the pixel 130 to the non-aperture area, thereby reducing the image retention phenomenon of the liquid crystal display panel 100 and improving the display effect of the liquid crystal display panel 100.

[0048] To avoid increased step height and AC image retention caused by uneven alignment coating due to the addition of M3 metal film layers, recesses can be etched on the thin-film transistor array 110 using etching equipment such as laser etching equipment to form a first recess 111 and a second recess 112. An M3 metal film layer is then disposed in the first recess 111 as a first electrode 170, and an M3 metal film layer is disposed in the second recess 112 as a second electrode 180. Based on the arrangement of the first recess 111 and the second recess 112, the final surface alignment of each film layer can be relatively flat, thereby reducing the problems of insufficient alignment force during friction caused by uneven alignment coating, which leads to AC image retention and edge light leakage.

[0049] When the first electrode 170 and the second electrode 180 are located above the data lines in the thin-film transistor array 110 in the first direction, and the materials of the first electrode 170 and the second electrode 180 include metal, the first electrode 170 and the second electrode 180 can partially shield and block light from the data lines. Consequently, the dimensions of the first shielding portion 140 and the second shielding portion 150 in the second direction can be designed to be smaller. For example, the dimension of the first shielding portion 140 in the second direction is less than or equal to 8 micrometers. The dimension of the second shielding portion 150 in the second direction is less than or equal to 8 micrometers. Reducing the dimensions of the first shielding portion 140 and the second shielding portion 150 in the second direction is beneficial for increasing the aperture ratio of the pixels 130 in the liquid crystal display panel 100, thereby improving the display effect of the liquid crystal display panel 100.

[0050] In some embodiments, the first electrode 170 and the second electrode 180 are each provided with a protective film on the side facing the filter 120.

[0051] For example, the material of the protective film may include a transparent conductive oxide. Transparent conductive oxides include, for example, indium tin oxide (ITO).

[0052] like Figure 6 as well as Figure 7As shown, the projection of the protective film of the first electrode 170 in the first direction can cover the first electrode 170, and the projection of the protective film of the second electrode 180 in the first direction can cover the second electrode 180. Neither the protective film of the first electrode 170 nor the second electrode 180 is connected to any signal, thus serving to shield the metal and prevent corrosion, effectively protecting both the first electrode 170 and the second electrode 180.

[0053] By using a protective film to protect the first electrode 170 and the second electrode 180, it is beneficial to continuously use the first electrode 170 and the second electrode 180 to reduce the image retention phenomenon of the liquid crystal display panel 100, thereby continuously improving the display effect of the liquid crystal display panel 100.

[0054] In some embodiments, the first electrode 170 is disposed on the side of the first shielding portion 140 facing the thin-film transistor array 110, and the second electrode 180 is disposed on the side of the second shielding portion 150 facing the thin-film transistor.

[0055] like Figure 8 As shown, a first electrode 170 is disposed on a first shielding portion 140, and the first electrode 170 is disposed on the side of the first shielding portion 140 facing the thin-film transistor array 110. A second electrode 180 is disposed on a second shielding portion 150, and the second electrode 180 is disposed on the side of the second shielding portion 150 facing the thin-film transistor array 110.

[0056] Since the first electrode 170 and the second electrode 180 are arranged adjacent to the liquid crystal cell 160 in the first direction and adjacent to each other in the second direction, a stable DC electric field can be formed between the corresponding pixels 130 when the polarities of the first electrode 170 and the second electrode 180 are different. Ionic impurities 162 in the liquid crystal cell 160 can move towards either pole of the DC electric field under the influence of the DC electric field, i.e., towards the first electrode 170 or the second electrode 180. When the ionic impurities 162 move towards the first electrode 170 or the second electrode 180, they can move from the aperture region of the pixel 130 to the non-aperture region, thereby reducing the number of ionic impurities 162 located in the aperture region of the pixel 130, reducing the image retention phenomenon of the liquid crystal display panel 100, and thus improving the display effect of the liquid crystal display panel 100.

[0057] In some embodiments, the first electrode 170 and the second electrode 180 are respectively located between adjacent pixels 130, and there is a third recess 121 and a fourth recess 122 between adjacent pixels 130. The third recess 121 is located between the first electrode 170 and the liquid crystal cell 160 in a first direction, and the fourth recess 122 is located between the second electrode 180 and the liquid crystal cell 160 in a first direction.

[0058] like Figure 8 As shown, the filter 120 has a plurality of pixels 130 on the side facing the thin-film transistor array 110. A first blocking portion 140 or a second blocking portion 150 is provided between adjacent pixels 130. There is a gap between adjacent pixels 130, which can be a third recess 121 or a fourth recess 122. The third recess 121 is located between the first electrode 170 and the liquid crystal cell 160 in the first direction, and the fourth recess 122 is located between the second electrode 180 and the liquid crystal cell 160 in the first direction.

[0059] For example, if the projection of the first blocking portion 140 in the first direction can cover the third recess 121, and the projection of the second blocking portion 150 in the first direction can cover the fourth recess 122, then the third recess 121 and the fourth recess 122 can be located in the non-opening area of ​​the pixel 130.

[0060] When the first electrode 170 and the second electrode 180 have different polarities, a stable DC electric field can be formed between the corresponding pixels 130. Ionic impurities 162 in the liquid crystal cell 160 can move towards either pole of the DC electric field under its influence, i.e., towards the first electrode 170 or the second electrode 180. Correspondingly, under the influence of the DC electric field between the first electrode 170 and the second electrode 180, ionic impurities 162 in the liquid crystal cell 160 can enter at least one of the third recess 121 and the fourth recess 122. The third recess 121 and the fourth recess 122 can restrict the movement of the ionic impurities 162, thereby working in conjunction with the first electrode 170 and the second electrode 180 to reduce the image retention phenomenon of the liquid crystal display panel 100 and improve the display effect of the liquid crystal display panel 100.

[0061] like Figure 9As shown, when the polarities of the first electrode 170 and the second electrode 180 are different, a stable DC electric field can be formed between the first electrode 170 and the second electrode 180. Ionic impurities 162 in the liquid crystal cell 160 can move towards either pole of the DC electric field under the influence of the DC electric field, such as towards at least one of the first electrode 170 and the second electrode 180. Accordingly, if ionic impurities 162 move towards the first electrode 170, they can accumulate in the third recess 121. If ionic impurities 162 move towards the second electrode 180, they can accumulate in the fourth recess 122. Since the third recess 121 and the fourth recess 122 have a certain depth, when the first electrode 170 and the second electrode 180 change from having different polarities to having no polarity, the ionic impurities 162 accumulated in the third recess 121 and the fourth recess 122 will be blocked and restricted by the sidewalls of the respective recesses, making it difficult for them to escape into the opening area of ​​the pixel 130. Furthermore, since the third recess 121 and the fourth recess 122 are located in the non-opening area, the influence of the ionic impurities 162 accumulated in the third recess 121 and the fourth recess 122 on the rotation of the liquid crystal 161 can be greatly reduced, thereby effectively improving the image retention problem of the liquid crystal display panel 100 and enhancing the display effect of the liquid crystal display panel 100.

[0062] In some embodiments, the first electrode 170 and the second electrode 180 are made of transparent conductive oxide.

[0063] For example, the first electrode 170 and the second electrode 180 are made of ITO.

[0064] like Figure 8 as well as Figure 9 As shown, when the first electrode 170 is disposed on the side of the first shielding portion 140 facing the thin-film transistor array 110, and the second electrode 180 is disposed on the side of the second shielding portion 150 facing the thin-film transistor, an ITO film layer can be added to the side of the first shielding portion 140 facing the thin-film transistor array 110 to serve as the first electrode 170, and an ITO film layer can be added to the side of the second shielding portion 150 facing the thin-film transistor array 110 to serve as the second electrode 180. Since the first shielding portion 140 and the second shielding portion 150 can be located above the data lines in the thin-film transistor array 110 in the first direction, the first electrode 170 and the second electrode 180 can also be located above the data lines in the thin-film transistor array 110 in the first direction; this is not a limitation.

[0065] For example, during the process of adding an ITO film layer on the side of the first shielding portion 140 facing the thin-film transistor array 110 and adding an ITO film layer on the side of the second shielding portion 150 facing the thin-film transistor array 110, a third recess 121 and a fourth recess 122 can be etched on the filter 120 using a laser etching device. Then, the added transparent ITO is deposited in the third recess 121 and the fourth recess 122 to form the first electrode 170 and the second electrode 180. Based on the setting of the third recess 121 and the fourth recess 122, it is possible to avoid the increase in the step difference between pixels 130 caused by adding the first electrode 170 and the second electrode 180, such as adding the corresponding ITO film layer, which would lead to uneven alignment film surface, insufficient alignment force during friction alignment, and thus problems such as AC image retention and edge light leakage.

[0066] Based on the configuration of the first electrode 170 and the second electrode 180, the image retention phenomenon of the liquid crystal display panel 100 can be reduced by utilizing the first electrode 170 and the second electrode 180 with different polarities, thereby continuously improving the display effect of the liquid crystal display panel 100.

[0067] A first electrode 170 and a second electrode 180 are disposed on the liquid crystal display panel 100. The first electrode 170 and the second electrode 180 are adjacent to the liquid crystal cell 160 in a first direction and adjacent to the second electrode 180 in a second direction. Given that the projection of the first blocking portion 140 in the first direction can cover the first electrode 170, and the projection of the second blocking portion 150 in the first direction can cover the second electrode 180, it can be determined that the positional relationship between the first electrode 170 and the second electrode 180 and the pixel 130 corresponds to the positional relationship between the first blocking portion 140 and the second blocking portion 150 and the pixel 130. Since the first electrode 170 and the second electrode 180 have different polarities, a stable DC electric field can be formed between the first electrode 170 and the second electrode 180. The ionic impurities 162 included in the liquid crystal cell 160 can move towards the poles of the DC electric field under the action of the DC electric field, which can reduce the ionic impurities 162 located in the opening area of ​​the pixel 130, thereby reducing the image retention phenomenon of the liquid crystal display panel 100 and improving the display effect of the liquid crystal display panel 100.

[0068] Please see Figure 10 , Figure 10 This is a schematic diagram of the structure of a liquid crystal display device 10 provided in an embodiment of this application.

[0069] In one embodiment, the liquid crystal display device 10 includes a liquid crystal display panel 100 as provided in any of the embodiments described above.

[0070] It should be understood that the liquid crystal display panel 100 provided in any of the above embodiments can reduce ionic impurities 162 located in the opening region of the pixel 130 by utilizing the first electrode 170 and the second electrode 180 disposed in the liquid crystal display panel 100, thereby reducing the image retention phenomenon of the liquid crystal display panel 100 and improving the display effect of the liquid crystal display panel 100. The specific structure and implementation principle of the liquid crystal display panel 100 included in the liquid crystal display device 10 can be referred to the foregoing text, and will not be described again here.

[0071] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0072] It should also be understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. It should be noted that, herein, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0073] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above descriptions are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A liquid crystal display panel, characterized in that, The liquid crystal display panel includes: A thin-film transistor array and a filter are arranged opposite to each other in a first direction; Multiple pixels are disposed on the side of the filter facing the thin-film transistor array; the multiple pixels are adjacent in a second direction, and a first blocking portion or a second blocking portion is disposed between adjacent pixels; the second direction is perpendicular to the first direction; A liquid crystal cell, the liquid crystal cell being located in a first direction between the plurality of pixels and the thin-film transistor array; the liquid crystal cell comprising liquid crystal and ionic impurities; A first electrode and a second electrode are adjacent to the liquid crystal cell in a first direction and adjacent to each other in a second direction; the projection of the first shielding portion in the first direction can cover the first electrode, and the projection of the second shielding portion in the first direction can cover the second electrode; the first electrode and the second electrode have different polarities.

2. The liquid crystal display panel according to claim 1, characterized in that, The first electrode and the second electrode are disposed on the side of the thin-film transistor array facing the filter.

3. The liquid crystal display panel according to claim 2, characterized in that, The thin-film transistor array has a first recess and a second recess on the side facing the filter. The first recess is located between the first electrode and the first shielding portion in a first direction, and the second recess is located between the second electrode and the second shielding portion in a first direction.

4. The liquid crystal display panel according to claim 3, characterized in that, The thin-film transistor array includes a passivation layer; The first electrode and the second electrode are located inside the passivation layer. The first recess is disposed on the side of the passivation layer facing the first shielding portion, and the second recess is disposed on the side of the passivation layer facing the second shielding portion.

5. The liquid crystal display panel according to claim 2, characterized in that, The first electrode and the second electrode are made of metal.

6. The liquid crystal display panel according to claim 5, characterized in that, The first electrode and the second electrode each have a protective film on the side facing the filter.

7. The liquid crystal display panel according to claim 1, characterized in that, The first electrode is disposed on the side of the first shielding portion facing the thin-film transistor array, and the second electrode is disposed on the side of the second shielding portion facing the thin-film transistor array.

8. The liquid crystal display panel according to claim 7, characterized in that, The first electrode and the second electrode are respectively located between adjacent pixels; there is a third recess and a fourth recess between adjacent pixels, the third recess is located between the first electrode and the liquid crystal cell in a first direction, and the fourth recess is located between the second electrode and the liquid crystal cell in a first direction.

9. The liquid crystal display panel according to claim 7, characterized in that, The first electrode and the second electrode are made of transparent conductive oxide.

10. A liquid crystal display device, characterized in that, The liquid crystal display device includes a liquid crystal display panel as described in any one of claims 1 to 9.

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