Display panel, display device and driving method

Abstract

The application discloses a display panel, a display device and a driving method. The display panel comprises an array substrate, a color film substrate, a liquid crystal layer and a support column. The liquid crystal layer and the support column are located between the array substrate and the color film substrate. The liquid crystal layer is parallel to the array substrate and the color film substrate for alignment. The fixed end of the support column is fixed on the array substrate. The free end of the support column is in contact with the color film substrate. The array substrate is provided with a pixel electrode and a first common electrode. The color film substrate is provided with a second common electrode and a reset driving electrode strip. The reset driving electrode strip is close to the free end of the support column. The fixed end of the support column is fixed on the array substrate. The second common electrode and the reset driving electrode strip are arranged on the color film substrate. After pressure test, the reset driving electric field between the reset driving electrode strip and the second common electrode is generated to drive the liquid crystal molecules in the liquid crystal layer to deflect towards the initial alignment direction, so that the initial alignment direction arrangement is maintained, thereby avoiding light leakage.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display panel, display device, and driving method. Background Technology

[0002] With the development of science and technology, LCD (Liquid Crystal Display) monitors have replaced bulky CRT monitors and are increasingly integrated into people's daily lives. In particular, LCD monitors have developed rapidly in recent years due to their small size, light weight, thinness, low power consumption, and no radiation. They occupy a dominant position in the current flat panel display market and are widely used in products of various sizes, covering almost all major electronic products in today's information society, such as LCD TVs, computers, mobile phones, PDAs, GPS, automotive displays, projection displays, cameras, digital cameras, electronic watches, calculators, electronic instruments, meters, public displays, and virtual displays.

[0003] Existing liquid crystal display devices include a thin film transistor array substrate (TFT array substrate), a color filter substrate (CF substrate), and liquid crystal molecules filled between the TFT array substrate and the color filter substrate. When the display device is in operation, driving voltages are applied to the pixel electrodes of the TFT array substrate and the common electrode of the color filter substrate, or driving voltages are applied to the common electrode and the pixel electrodes of the TFT array substrate, respectively, to control the rotation direction of the liquid crystal molecules between the two substrates, so as to refract the backlight provided by the backlight module of the display device, thereby displaying the image.

[0004] Figure 1 This is a schematic diagram of the alignment structure of negative liquid crystal molecules in a display panel in the prior art. Figure 2 This is a schematic diagram illustrating light leakage from a display panel after a pressure test, as shown in existing technology. Figure 1 As shown, alignment layers are deposited on both the array substrate and the color filter substrate to align the liquid crystal molecules. The alignment direction of the negative liquid crystal molecules is typically approximately perpendicular to the electrode strips of the pixel electrodes, i.e., approximately perpendicular to the extension direction of the data lines. After a pressure test, the color filter substrate indents downwards. At this time, the support pillars (PS) fixed to the color filter substrate move with the movement of the color filter substrate, causing the free ends of the spacers to slide. During this process, the free ends can easily scratch the alignment layer on the array substrate, causing light leakage and resulting in light spots on the display panel. (Refer to...) Figure 2 It appears as colored / white bright spots (color spots).

[0005] Figure 3 This is a schematic diagram of the alignment structure of positive liquid crystal molecules in a display panel in existing technology. To reduce light leakage after pressure testing, such as... Figure 3 As shown, in existing technologies, positive liquid crystals are used for alignment with electrode strips that are approximately parallel to the pixel electrodes, i.e., approximately perpendicular to the extension direction of the scan lines. The black matrix corresponding to the scan line area is relatively wide, which can block some light leakage and makes it less prone to light leakage. Alternatively, some existing technologies use a scheme to widen the black matrix linewidth, but this will result in a loss of aperture ratio. Summary of the Invention

[0006] In order to overcome the shortcomings and deficiencies of the prior art, the present invention aims to provide a display panel, display device and driving method to solve the problem of light leakage in the prior art after the display panel has undergone pressure testing.

[0007] The objective of this invention is achieved through the following technical solution: The present invention provides a display panel, including an array substrate, a color filter substrate, a liquid crystal layer and a support pillar. The liquid crystal layer and the support pillar are both located between the array substrate and the color filter substrate. The liquid crystal molecules in the liquid crystal layer are aligned parallel to the array substrate and the color filter substrate. The fixed end of the support pillar is fixed to the array substrate, and the free end of the support pillar abuts against the color filter substrate. The display panel has multiple pixel units arranged in an array, and the array substrate is provided with pixel electrodes corresponding to each pixel unit and a first common electrode cooperating with the pixel electrodes. The color filter substrate is provided with a second common electrode and multiple reset driving electrode strips that cooperate with the second common electrode. The reset driving electrode strips are located between two adjacent rows of pixel units and near the free end of the support pillar. The reset driving electrode strips and the second common electrode are used to generate a reset driving electric field that drives the liquid crystal molecules in the liquid crystal layer to deflect toward the initial alignment direction.

[0008] Furthermore, the liquid crystal layer uses negative liquid crystal molecules, and the alignment direction of the negative liquid crystal molecules on the side near the array substrate is parallel to the alignment direction on the side near the color filter substrate, and is also parallel to the extension direction of the reset driving electrode strip. Alternatively, the liquid crystal layer may employ positive liquid crystal molecules, wherein the alignment direction of the positive liquid crystal molecules on the side near the array substrate is parallel to the alignment direction on the side near the color filter substrate, and is perpendicular to the extension direction of the reset driving electrode strip.

[0009] Furthermore, the plurality of reset drive electrode strips include a first reset drive electrode strip and a second reset drive electrode strip, and the first reset drive electrode strip and the second reset drive electrode strip are provided near the free end of each support column.

[0010] Furthermore, for adjacent rows of pixel units, the first reset driving electrode strip and the second reset driving electrode strip are each located on both sides of each of the support pillars.

[0011] Furthermore, for each pair of adjacent rows of pixel units, the first reset driving electrode strip and the second reset driving electrode strip are provided on both sides of each support post.

[0012] Furthermore, the color filter substrate is provided with a first connection electrode, and all the first reset drive electrode strips and all the second reset drive electrode strips are electrically connected to the first connection electrode.

[0013] Furthermore, the color filter substrate is provided with a first connection electrode and a second connection electrode, all of the first reset drive electrode strips are electrically connected to the first connection electrode, and all of the second reset drive electrode strips are electrically connected to the second connection electrode.

[0014] This application also provides a display device, including the display panel described above.

[0015] This application also provides a driving method for a display panel, used to drive the display panel as described above, the driving method comprising: During a non-display time period between two adjacent frames, a common voltage signal is applied to the second common electrode, and a reset drive signal is applied to the reset drive electrode strip at least during the non-display time period, so that a reset drive electric field is generated between the reset drive electrode strip and the second common electrode to drive the liquid crystal molecules in the liquid crystal layer to deflect toward the initial alignment direction.

[0016] Furthermore, the plurality of reset drive electrode strips includes a first reset drive electrode strip and a second reset drive electrode strip, and the driving method includes: The first reset drive electrode strip and the second reset drive electrode strip are applied with the same reset drive signal at the same time; Alternatively, the first reset drive electrode and the second reset drive electrode may apply reset drive signals of opposite polarities at the same time.

[0017] The beneficial effects of this invention are as follows: by fixing the fixed end of the support column to the array substrate, and setting a second common electrode and multiple reset driving electrode strips that cooperate with the second common electrode on the color filter substrate, after pressure testing, by controlling the generation of a reset driving electric field between the reset driving electrode strips and the second common electrode, the liquid crystal molecules in the liquid crystal layer are driven to deflect toward the initial alignment direction. Even if the free end of the support column scratches the alignment layer of the color filter substrate, the liquid crystal molecules near the color filter substrate can maintain the initial alignment direction, thereby avoiding light leakage. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a display panel using the alignment method of negative liquid crystal molecules in the prior art.

[0019] Figure 2 This is a schematic diagram of light leakage in a display panel after a pressure test in the prior art.

[0020] Figure 3 This is a schematic diagram of the alignment method of positive liquid crystal molecules in the display panel in the prior art.

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the display device in the initial state along the first direction in Embodiment 1 of the present invention.

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the display device in the initial state along the second direction in Embodiment 1 of the present invention.

[0023] Figure 6 This is a schematic diagram of the planar structure of the array substrate and the reset driving electrode strip in Embodiment 1 of the present invention.

[0024] Figure 7 This is a schematic diagram of the planar structure of the color filter substrate in Embodiment 1 of the present invention.

[0025] Figure 8 This is a schematic diagram of the planar structure of the reset driving electrode strip in Embodiment 1 of the present invention.

[0026] Figure 9 This is one of the driving waveform diagrams of the display device in Embodiment 1 of the present invention.

[0027] Figure 10 This is the second driving waveform diagram of the display device in Embodiment 1 of the present invention.

[0028] Figure 11 This is the third driving waveform diagram of the display device in Embodiment 1 of the present invention.

[0029] Figure 12 This is a schematic diagram of the cross-sectional structure of the display device along the first direction during the non-display period in Embodiment 1 of the present invention.

[0030] Figure 13 This is a schematic diagram of the cross-sectional structure of the display device along the second direction during the non-display period in Embodiment 1 of the present invention.

[0031] Figure 14 This is a schematic diagram of the cross-sectional structure of the display device along the first direction during the display time period in Embodiment 1 of the present invention.

[0032] Figure 15 This is a schematic diagram of the cross-sectional structure of the display device along the second direction during the display time period in Embodiment 1 of the present invention.

[0033] Figure 16 This is one of the driving waveform diagrams of the display device in Embodiment 2 of the present invention.

[0034] Figure 17 This is the second driving waveform diagram of the display device in Embodiment 2 of the present invention.

[0035] Figure 18 This is a schematic diagram of the cross-sectional structure of the display device along the first direction during the display time period in Embodiment 2 of the present invention.

[0036] Figure 19 This is a schematic diagram of the cross-sectional structure of the display device along the second direction during the display time period in Embodiment 2 of the present invention.

[0037] Figure 20 This is a planar simulation diagram of a display device in the prior art.

[0038] Figure 21 yes Figure 20 A cross-sectional simulation diagram of the L0 display device.

[0039] Figure 22 yes Figure 20 A cross-sectional simulation diagram of the L255 display device.

[0040] Figure 23 This is a planar simulation diagram of the display device in Embodiment 2 of the present invention.

[0041] Figure 24 yes Figure 23 A cross-sectional simulation diagram of the L0 display device.

[0042] Figure 25 yes Figure 23 A cross-sectional simulation diagram of the L255 display device.

[0043] Figure 26 This is a schematic diagram of the planar structure of the array substrate and the reset driving electrode strip in Embodiment 3 of the present invention.

[0044] Figure 27This is a schematic diagram of the planar structure of the reset driving electrode strip in Embodiment 3 of the present invention.

[0045] Figure 28 This is a schematic diagram of the planar structure of the array substrate and the reset driving electrode strip in Embodiment 4 of the present invention.

[0046] Figure 29 This is a schematic diagram of the planar structure of the array substrate and the reset driving electrode strip in Embodiment 5 of the present invention. Detailed Implementation

[0047] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following detailed description, in conjunction with the accompanying drawings and preferred embodiments, provides a detailed explanation of the specific implementation methods, structures, features, and effects of the display panel, display device, and driving method proposed according to the present invention: [Example 1] Figure 4 This is a schematic diagram of the cross-sectional structure of the display device in the initial state along the first direction in Embodiment 1 of the present invention. Figure 5 This is a schematic diagram of the cross-sectional structure of the display device in the initial state along the second direction in Embodiment 1 of the present invention. Figure 6 This is a schematic diagram of the planar structure of the array substrate and the reset driving electrode strip in Embodiment 1 of the present invention. Figure 7 This is a schematic diagram of the planar structure of the color filter substrate in Embodiment 1 of the present invention. Figure 8 This is a schematic diagram of the planar structure of the reset driving electrode strip in Embodiment 1 of the present invention.

[0048] like Figures 4 to 8 As shown in Embodiment 1 of the present invention, a display panel includes an array substrate 10, a color filter substrate 20, a liquid crystal layer 30, and a support pillar 40. The array substrate 10 and the color filter substrate 20 are arranged parallel to each other and opposite to each other. The liquid crystal layer 30 and the support pillar 40 are both located between the array substrate 10 and the color filter substrate 20. The color filter substrate 20 is located on the side of the display panel closer to the external environment, and the array substrate 10 is located on the side of the display panel farther from the external environment. The liquid crystal molecules in the liquid crystal layer 30 are aligned parallel to the array substrate 10 and the color filter substrate 20, that is, in the initial state, the liquid crystal molecules in the liquid crystal layer 30 are in an approximately flat position. The fixed end of the support pillar 40 is fixed to the array substrate 10, and the free end of the support pillar 40 abuts against the color filter substrate 20. Therefore, during pressure testing, the free end of the support pillar 40 scratches the alignment layer on the color filter substrate 20, while avoiding scratching the alignment layer on the array substrate 10.

[0049] The display panel has multiple pixel units P arranged in an array. The array substrate 10 is provided with pixel electrodes 12 corresponding to each pixel unit P and a first common electrode 11 cooperating with the pixel electrodes 12. The pixel electrodes 12 and the first common electrode 11 are used to drive the liquid crystal molecules in the liquid crystal layer 30 to deflect horizontally, so as to achieve grayscale brightness control.

[0050] like Figure 6 As shown, the array substrate 10 has multiple pixel units P formed by multiple scan lines 1 and multiple data lines 2 intersecting and insulating each other on the side facing the liquid crystal layer 30. The scan lines 1 extend along the second direction T2, and the data lines 2 extend along the first direction T1. Each pixel unit P is provided with a pixel electrode 12 and a thin-film transistor 3. The pixel electrode 12 is electrically connected to the scan lines 1 and data lines 2 adjacent to the thin-film transistor 3 through the thin-film transistor 3. The thin-film transistor 3 includes a gate, an active layer, a drain, and a source. The gate is located on the same layer as the scan line 1 and is electrically connected. The gate is isolated from the active layer by an insulating layer. The source is electrically connected to the data line 2, and the drain is electrically connected to the pixel electrode 12 through a contact hole.

[0051] like Figure 4 and Figure 5 As shown, in this embodiment, a first common electrode 11 is further provided on the side of the array substrate 10 facing the liquid crystal layer 30. The first common electrode 11 and the pixel electrode 12 are located on different layers and are insulated from each other by an insulating layer. The first common electrode 11 may be located above or below the pixel electrode 12. Figure 4 and Figure 5 The diagram shows the first common electrode 11 located below the pixel electrode 12. Preferably, the first common electrode 11 is a planar electrode with its entire surface disposed, and the pixel electrode 12 is a slit electrode with multiple electrode strips within each pixel unit P. The electrode strips of the pixel electrode 12 extend along the first direction T1 to form a fringe field switching (FFS) mode. Of course, in other embodiments, the pixel electrode 12 and the first common electrode 11 may be located on the same layer, but they are insulated from each other. Each of the pixel electrode 12 and the first common electrode 11 may include multiple electrode strips extending along the first direction T1. The electrode strips of the pixel electrode 12 and the electrode strips of the first common electrode 11 are arranged alternately to form an in-plane switching (IPS) mode.

[0052] The color filter substrate 20 is provided with a second common electrode 23 and multiple reset driving electrode strips 24 that cooperate with the second common electrode 23. In this embodiment, the second common electrode 23 is a planar electrode that is arranged across the entire surface, and the multiple reset driving electrode strips 24 are arranged parallel to each other and along the second direction T2. Figure 6The extension direction of the reset driving electrode strip 24 is perpendicular to the extension direction of the scan line 1 and to the extension direction of the electrode strip of the pixel electrode 12. The reset driving electrode strip 24 is located between two adjacent rows of pixel units P and near the free end of the support pillar 40. The reset driving electrode strip 24 and the second common electrode 23 are used to generate a reset driving electric field to drive the liquid crystal molecules in the liquid crystal layer 30 to deflect towards the initial alignment direction. Therefore, after the pressure test, the reset driving electric field generated between the reset driving electrode strip 24 and the second common electrode 23 can be controlled to drive the liquid crystal molecules in the liquid crystal layer 30 to deflect towards the initial alignment direction. Even if the free end of the support pillar 40 scratches the alignment layer of the color filter substrate 20, the liquid crystal molecules near the color filter substrate 20 can maintain the initial alignment direction, thereby avoiding light leakage.

[0053] In this embodiment, the liquid crystal layer 30 uses negative liquid crystal molecules, that is, liquid crystal molecules with negative dielectric anisotropy. For example... Figures 4 to 6 As shown, in the initial state, the alignment direction of the negative liquid crystal molecules near the array substrate 10 is parallel to the alignment direction near the color filter substrate 20, and is also parallel to the extension direction of the reset driving electrode strip 24. For example, the initial alignment direction of the negative liquid crystal molecules is along the second direction T2, that is, parallel to the extension direction of the reset driving electrode strip 24, and perpendicular to the extension direction of the electrode strip of the pixel electrode 12. Of course, in other embodiments, the liquid crystal layer 30 can also use positive liquid crystal molecules, that is, liquid crystal molecules with positive dielectric anisotropy. In the initial state, the alignment direction of the positive liquid crystal molecules near the array substrate 10 is parallel to the alignment direction near the color filter substrate 20, and is perpendicular to the extension direction of the reset driving electrode strip 24. For example, the initial alignment direction of the positive liquid crystal molecules is along the first direction T1, that is, perpendicular to the extension direction of the reset driving electrode strip 24, and parallel to the extension direction of the electrode strip of the pixel electrode 12.

[0054] like Figure 7As shown, the color filter substrate 20 is provided with a black matrix 21 and color resist layers 22. The black matrix 21 separates multiple color resist layers 22. Each color resist layer 22 corresponds to a pixel unit P, that is, each color resist layer 22 corresponds to one pixel unit P. The color resist layers 22 include red color resist layers, green color resist layers, and blue color resist layers, and correspondingly form red (R), green (G), and blue (B) pixel units P. Each pixel unit P corresponds to a color resist layer 22 of one color. Among them, the black matrix 21 has a grid structure. The projection of the support pillar 40 on the color filter substrate 20 is located within the area corresponding to the black matrix 21. The projection of the reset driving electrode strip 24 on the color filter substrate 20 overlaps with the black matrix 21 and extends out of the area corresponding to the black matrix 21. For example, the width a of the overlap between the projection of the reset driving electrode strip 24 on the color filter substrate 20 and the black matrix 21 is ≥ 5 μm, and the width b of the projection extending out of the black matrix 21 is ≤ 10 μm.

[0055] like Figure 6 and Figure 8 As shown, in this embodiment, the multiple reset driving electrode strips 24 include a first reset driving electrode strip 241 and a second reset driving electrode strip 242. Each support post 40 has a first reset driving electrode strip 241 and a second reset driving electrode strip 242 near its free end. Optionally, for adjacent rows of pixel units P, the first reset driving electrode strip 241 and the second reset driving electrode strip 242 are located on opposite sides of each support post 40. In this embodiment, for adjacent rows of pixel units P, each support post 40 has a first reset driving electrode strip 241 on one side and a second reset driving electrode strip 242 on the other side.

[0056] Furthermore, the color filter substrate 20 is provided with a first connection electrode 243 and a second connection electrode 244. All the first reset drive electrode strips 241 are electrically connected to the first connection electrode 243, and all the second reset drive electrode strips 242 are electrically connected to the second connection electrode 244, so that the first reset drive electrode strips 241 and the second reset drive electrode strips 242 can apply different signals respectively.

[0057] An array substrate 10 has a first polarizer 13, and a color filter substrate 20 has a second polarizer 32. The light transmission axis of the first polarizer 31 is perpendicular to the light transmission axis of the second polarizer 25. The first polarizer 13 is located on the lower side of the display panel, and the second polarizer 25 is located on the upper side of the display panel.

[0058] The array substrate 10 and the color filter substrate 20 can be made of materials such as glass, acrylic, and polycarbonate. The first common electrode 11, the pixel electrode 12, the second common electrode 23, and the reset drive electrode strip 24 can be made of materials such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0059] This application also provides a display device, including a backlight module 50 and a display panel as described above. The backlight module 50 is located on the light-incident side of the display panel to provide a backlight source for the display panel. Preferably, the backlight module 50 is a direct-lit backlight, but it can also be an edge-lit backlight.

[0060] This application also provides a driving method for a display panel, used to drive the display panel as described above, the driving method comprising: Figure 9 This is one of the driving waveform diagrams of the display device in Embodiment 1 of the present invention. Figure 10 This is the second driving waveform diagram of the display device in Embodiment 1 of the present invention. Figure 11 This is the third driving waveform diagram of the display device in Embodiment 1 of the present invention. Figures 9 to 11 As shown, a first drive signal V1 is applied to the first reset drive electrode 241, a second drive signal V2 is applied to the second reset drive electrode 242, and a common voltage signal Vcom is applied to the second common electrode 23.

[0061] During the non-display time period between two adjacent frames, a common voltage signal Vcom is applied to the second common electrode 23, and a reset drive signal (first drive signal V1, second drive signal V2) is applied to the reset drive electrode strip 24 at least during the non-display time period, so that a reset drive electric field is generated between the reset drive electrode strip 24 and the second common electrode 23 to drive the liquid crystal molecules in the liquid crystal layer 30 to deflect toward the initial alignment direction.

[0062] Figure 12 This is a schematic diagram of the cross-sectional structure of the display device along the first direction during the non-display period in Embodiment 1 of the present invention. Figure 13 This is a schematic cross-sectional view of the display device along the second direction during a non-display period in Embodiment 1 of the present invention. Figure 9 and Figure 10 as well as Figure 12 and Figure 13 As shown, during the non-display period, a common voltage signal Vcom is applied to the second common electrode 23, a first drive signal V1 is applied to the first reset drive electrode 241, and a second drive signal V2 is applied to the second reset drive electrode 242. The first drive signal V1 and the second drive signal V2 are reset drive signals with the same period but opposite polarity, that is, the first reset drive electrode 241 and the second reset drive electrode 242 apply reset drive signals with opposite polarity at the same time. For example, the first drive signal V1 and the second drive signal V2 are 5V square waves. Figure 9 The polarities of the first driving signal V1 and the second driving signal V2 remain unchanged. Figure 10The polarities of the first driving signal V1 and the second driving signal V2 change once per frame. This causes the first reset driving electrode strip 241 and the second reset driving electrode strip 242 to respectively form a reset driving electric field with the second common electrode 23. Figure 12 and Figure 13 E1 in the liquid crystal layer 30 is used to drive the liquid crystal molecules in the liquid crystal layer 30 to deflect towards the initial alignment direction. Of course, as Figure 11 As shown, the first driving signal V1 and the second driving signal V2 can also be reset driving signals with the same polarity, that is, the first reset driving electrode strip 241 and the second reset driving electrode strip 242 apply the same reset driving signal at the same time. For example, the first driving signal V1 and the second driving signal V2 are both 5V square waves, and their polarity can be changed once per frame.

[0063] Figure 14 This is a schematic diagram of the cross-sectional structure of the display device along the first direction during the display time period in Embodiment 1 of the present invention. Figure 15 This is a schematic cross-sectional view of the display device along the second direction during the display time period in Embodiment 1 of the present invention. Figures 9 to 11 as well as Figure 14 and Figure 15 As shown, within each frame, a common voltage signal Vcom is applied to the first driving signal V1 and the second driving signal V2. Alternatively, no voltage is applied to the first reset driving electrode 241, the second reset driving electrode 242, and the second common electrode 23; they are grounded (connected to GND signal) to avoid affecting the image display. Applying the common voltage signal Vcom to the first common electrode 11 and the corresponding grayscale voltage to the pixel electrode 12 creates a voltage difference between the pixel electrode 12 and the first common electrode 11, generating a horizontal electric field. Figure 14 and Figure 15 E2 in the image causes the negative liquid crystal molecules to deflect in the horizontal direction in a direction perpendicular to the horizontal electric field. The gray level voltage includes 0 to 255 gray level voltages. When different gray level voltages are applied to the pixel electrode 12, the pixel unit P presents different brightness, thereby displaying different images to achieve normal image display.

[0064] [Example 2] Figure 16 This is one of the driving waveform diagrams of the display device in Embodiment 2 of the present invention. Figure 17 This is the second driving waveform diagram of the display device in Embodiment 2 of the present invention. Figure 18 This is a schematic diagram of the cross-sectional structure of the display device along the first direction during the display time period in Embodiment 2 of the present invention. Figure 19 This is a schematic cross-sectional view of the display device along the second direction during the display time period in Embodiment 2 of the present invention. Figures 16 to 19 As shown, the display panel, display device, and driving method provided in Embodiment 2 of the present invention are the same as those in Embodiment 1. Figures 4 to 15The display panel, display device, and driving method are basically the same in the following cases: In this embodiment, within each frame, a common voltage signal Vcom is applied to the second common electrode 23, a first driving signal V1 is applied to the first reset driving electrode strip 241, and a second driving signal V2 is applied to the second reset driving electrode strip 242, thereby causing the first reset driving electrode strip 241 and the second reset driving electrode strip 242 to respectively form a reset driving electric field with the second common electrode 23. Figure 18 and Figure 19 In the case of E1), a reset driving signal is applied to the reset driving electrode strip 24 during each frame and the non-display period between adjacent frames, thereby ensuring that the liquid crystal molecules near the support pillar 40 maintain their initial alignment direction. For example, Figure 16 The periods of the first driving signal V1 and the second driving signal V2 are less than the time of each frame, and they change multiple times within each frame; or, Figure 17 The polarities of the first driving signal V1 and the second driving signal V2 change once per frame. A common voltage signal Vcom is applied to the first common electrode 11, and a corresponding grayscale voltage is applied to the pixel electrode 12. A voltage difference is formed between the pixel electrode 12 and the first common electrode 11, generating a horizontal electric field. Figure 18 and Figure 19 E2 in the image causes the negative liquid crystal molecules to deflect in the horizontal direction in a direction perpendicular to the horizontal electric field. The gray level voltage includes 0 to 255 gray level voltages. When different gray level voltages are applied to the pixel electrode 12, the pixel unit P presents different brightness, thereby displaying different images to achieve normal image display.

[0065] Figure 20 This is a planar simulation diagram of a display device in the prior art. Figure 21 yes Figure 20 A cross-sectional simulation diagram of the L0 display device. Figure 22 yes Figure 20 A cross-sectional simulation diagram of the L255 display device. Figure 23 This is a planar simulation diagram of the display device in Embodiment 2 of the present invention. Figure 24 yes Figure 23 A cross-sectional simulation diagram of the L0 display device. Figure 25 yes Figure 23 A cross-sectional simulation diagram of the L255 display device. (See attached diagram.) Figures 20 to 25 As shown, compared with the prior art, this application applies a reset drive signal to the reset drive electrode strip 24 when displaying the screen, so that the liquid crystal molecules near the support pillar 40 always maintain the initial alignment direction. Although the light transmittance will decrease, light leakage near the support pillar 40 due to pressure testing can be avoided. Figure 23In the process, when the amplitudes of the first driving signal V1 and the second driving signal V2 are 3V, the transmittance decreases by 2% compared to the prior art; when the amplitudes of the first driving signal V1 and the second driving signal V2 are 5V, the transmittance decreases by 5% compared to the prior art.

[0066] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

[0067] [Example 3] Figure 26 This is a schematic diagram of the planar structure of the array substrate and the reset driving electrode strip in Embodiment 3 of the present invention. Figure 27 This is a schematic diagram of the planar structure of the reset driving electrode strip in Embodiment 3 of the present invention. Figure 26 and Figure 27 As shown, the display panel, display device, and driving method provided in Embodiment 3 of the present invention are the same as those in Embodiment 1. Figures 4 to 15 Example 2 Figures 16 to 19 The display panel, display device, and driving method are basically the same in the following cases: In this embodiment, a first connection electrode 243 is provided on the color filter substrate 20. All the first reset drive electrode strips 241 and all the second reset drive electrode strips 242 are electrically connected to the first connection electrode 243. That is, all the reset drive electrode strips 24 are electrically connected together through the first connection electrode 243, so that they apply the same signal together. (Refer to...) Figure 11 .

[0068] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1 and Embodiment 2, and will not be repeated here.

[0069] [Example 4] Figure 28 This is a schematic diagram of the planar structure of the array substrate and the reset driving electrode strip in Embodiment 4 of the present invention. Figure 28 As shown, the display panel, display device, and driving method provided in Embodiment 4 of the present invention are the same as those in Embodiment 1. Figures 4 to 15 Example 2 Figures 16 to 19 Example 3 Figure 26 and Figure 27 The display panel, display device, and driving method are basically the same in the following cases: In this embodiment, for each pair of adjacent rows of pixel units P, each support post 40 has multiple first reset driving electrode strips 241 on one side and multiple second reset driving electrode strips 242 on the other side, thereby increasing the intensity of the reset driving electric field and increasing the light leakage prevention effect.

[0070] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1, Embodiment 2, and Embodiment 3, and will not be repeated here.

[0071] [Example 5] Figure 29 This is a schematic diagram of the planar structure of the array substrate and the reset driving electrode strip in Embodiment 5 of the present invention. Figure 29 As shown, the display panel, display device, and driving method provided in Embodiment 5 of the present invention are the same as those in Embodiment 1. Figures 4 to 15 Example 2 Figures 16 to 19 Example 3 Figure 26 and Figure 27 The display panel, display device, and driving method are basically the same in the following cases: In this embodiment, for each pair of adjacent rows of pixel units P, a first reset driving electrode strip 241 and a second reset driving electrode strip 242 are provided on both sides of each support post 40. That is, for each pair of adjacent rows of pixel units P, a first reset driving electrode strip 241 and a second reset driving electrode strip 242 are provided on one side of each support post 40, and a first reset driving electrode strip 241 and a second reset driving electrode strip 242 are provided on the other side, thereby increasing the intensity of the reset driving electric field and improving the light leakage prevention effect. Optionally, for each pair of adjacent rows of pixel units P, a first reset driving electrode strip 241 and a second reset driving electrode strip 242 are provided on one side of each support post 40, and a first reset driving electrode strip 241 and a second reset driving electrode strip 242 are provided on the other side.

[0072] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1, Embodiment 2, and Embodiment 3, and will not be repeated here.

[0073] In this document, the directional terms such as up, down, left, right, front, and back are defined according to the position of the structures in the accompanying drawings and the relative positions of the structures, and are only used for clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application. It should also be understood that the terms "first" and "second," etc., used herein are only used for distinction in name and are not used to limit the number or order.

[0074] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content without departing from the scope of the technical solution of the present invention, which are equivalent embodiments with equivalent changes. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the technical solution of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A display panel, characterized in that, The system includes an array substrate (10), a color filter substrate (20), a liquid crystal layer (30), and a support pillar (40). The liquid crystal layer (30) and the support pillar (40) are both located between the array substrate (10) and the color filter substrate (20). The liquid crystal molecules in the liquid crystal layer (30) are aligned parallel to the array substrate (10) and the color filter substrate (20). The fixed end of the support pillar (40) is fixed to the array substrate (10), and the free end of the support pillar (40) abuts against the color filter substrate (20). The display panel has a plurality of pixel units (P) arranged in an array, and the array substrate (10) is provided with pixel electrodes (12) corresponding to each pixel unit (P) and a first common electrode (11) cooperating with the pixel electrodes (12); The color filter substrate (20) is provided with a second common electrode (23) and a plurality of reset driving electrode strips (24) that cooperate with the second common electrode (23). The reset driving electrode strips (24) are located between two adjacent rows of pixel units (P) and are disposed near the free end of the support column (40). The reset driving electrode strips (24) and the second common electrode (23) are used to generate a reset driving electric field that drives the liquid crystal molecules in the liquid crystal layer (30) to deflect toward the initial alignment direction.

2. The display panel according to claim 1, characterized in that, The liquid crystal layer (30) uses negative liquid crystal molecules. The alignment direction of the negative liquid crystal molecules on the side near the array substrate (10) is parallel to the alignment direction on the side near the color filter substrate (20), and is parallel to the extension direction of the reset driving electrode strip (24). Alternatively, the liquid crystal layer (30) may employ positive liquid crystal molecules, wherein the alignment direction of the positive liquid crystal molecules on the side near the array substrate (10) is parallel to the alignment direction on the side near the color filter substrate (20), and is perpendicular to the extension direction of the reset driving electrode strip (24).

3. The display panel according to claim 1, characterized in that, The plurality of reset drive electrode strips (24) include a first reset drive electrode strip (241) and a second reset drive electrode strip (242), and the first reset drive electrode strip (241) and the second reset drive electrode strip (242) are provided near the free end of each support column (40).

4. The display panel according to claim 3, characterized in that, Between two adjacent rows of pixel units (P), the first reset drive electrode strip (241) and the second reset drive electrode strip (242) are each located on both sides of each of the support pillars (40).

5. The display panel according to claim 3, characterized in that, Between two adjacent rows of pixel units (P), each of the support pillars (40) is provided with a first reset driving electrode strip (241) and a second reset driving electrode strip (242) on both sides.

6. The display panel according to claim 3, characterized in that, The color filter substrate (20) is provided with a first connection electrode (243), and all the first reset drive electrode strips (241) and all the second reset drive electrode strips (242) are electrically connected to the first connection electrode (243).

7. The display panel according to claim 3, characterized in that, The color filter substrate (20) is provided with a first connection electrode (243) and a second connection electrode (244). All the first reset drive electrode strips (241) are electrically connected to the first connection electrode (243), and all the second reset drive electrode strips (242) are electrically connected to the second connection electrode (244).

8. A display device, characterized in that, Includes the display panel as described in any one of claims 1-7.

9. A driving method for a display panel, characterized in that, The driving method for driving the display panel as described in any one of claims 1-7 includes: During a non-display time period between two adjacent frames, a common voltage signal is applied to the second common electrode (23), and a reset drive signal is applied to the reset drive electrode strip (24) at least during the non-display time period, so that a reset drive electric field is generated between the reset drive electrode strip (24) and the second common electrode (23) to drive the liquid crystal molecules in the liquid crystal layer (30) to deflect toward the initial alignment direction.

10. The driving method for a display panel according to claim 9, characterized in that, The plurality of reset drive electrode strips (24) include a first reset drive electrode strip (241) and a second reset drive electrode strip (242), and the driving method includes: The first reset drive electrode strip (241) and the second reset drive electrode strip (242) are given the same reset drive signal at the same time; Alternatively, the first reset drive electrode strip (241) and the second reset drive electrode strip (242) may apply reset drive signals of opposite polarities at the same time.

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