Repair method of display panel, display panel and display device

Abstract

The invention discloses a display panel repairing method, a display panel and a display device, and relates to the field of display, and the display panel repairing method comprises the steps that the display panel is provided; detecting whether a pixel structure in the display panel is abnormal or not; if yes, according to a preset rule, a repairing pixel structure used for repairing the abnormal pixel structure is selected from the normal pixel structures; connecting the pixel electrode of the abnormal pixel structure with the pixel electrode of the repairing pixel structure through a repairing structure; wherein the color of the abnormal pixel structure is the same as that of the repaired pixel structure; through the above design, one pixel electrode can control two pixel structures, the operation is simple, and the restoration stability is high.

Description

Technical Field

[0001] The present application relates to the field of displays, and in particular, to a method for repairing a display panel, a display panel, and a display device. Background Art

[0002] Liquid crystal display devices (LCDs, Liquid Crystal Displays) have many advantages such as a thin body, power saving, and no radiation, and have gradually become the mainstream of display devices, being widely used in products such as mobile phones, laptop computers, and flat-panel TVs. Most of the liquid crystal display devices in the existing market are backlight-type liquid crystal display devices, which include a liquid crystal display panel and a backlight module. Generally, the liquid crystal display panel is composed of a color filter substrate (CF, Color Filter), a thin film transistor (TFT, Thin Film Transistor) array substrate, liquid crystal (LC, Liquid Crystal) sandwiched between the color filter substrate and the thin film transistor array substrate, and a sealant frame.

[0003] Scan lines for providing scan signals, data lines for providing data signals, and pixel structures defined by the scan lines and the data lines are formed on the TFT array substrate. A TFT and a pixel electrode are provided in the pixel structure. The magnitude and on / off of the voltage on the pixel electrode are controlled by a gate connected to the horizontal scan line and a source connected to the vertical data line.

[0004] Currently, liquid crystal displays are developing towards high resolution, high definition, etc. Correspondingly, in order to meet the high-resolution requirements, the device structure is becoming more and more refined, and the wiring is becoming narrower. Due to the reasons of the process, there will be defects such as broken lines, short circuits, and TFT device failures, resulting in dark spot defects in pixel points and affecting the display effect. Summary of the Invention

[0005] The purpose of the present application is to provide a method for repairing a display panel, a display panel, and a display device that are simple to operate and improve the repair stability.

[0006] The present application discloses a method for repairing a display panel, including the steps of: Providing a display panel; Detecting whether there is an abnormality in the pixel structure in the display panel; If so, selecting a repair pixel structure for repairing the abnormal pixel structure from the normal pixel structures according to a preset rule; Connecting the pixel electrode of the abnormal pixel structure and the pixel electrode of the repair pixel structure through a repair structure; Wherein, the color of the abnormal pixel structure is the same as the color of the repair pixel structure.

[0007] Optionally, the step of detecting whether there is an abnormality in the pixel structure in the display panel includes the steps of: Detect the display panel; Determine the position of the abnormal pixel structure; and Locate the position of the abnormal pixel structure.

[0008] Optionally, after the step of locating the position of the abnormal pixel structure, the method further includes the steps of: Determine whether the pixel structures of the same color adjacent to the abnormal pixel structure are normal; If so, the step of selecting a repair pixel structure for repairing the abnormal pixel structure from the normal pixel structures according to a preset rule includes: If so, select the adjacent normal pixel structure of the same color as the repair pixel structure according to a preset rule; If not, re-determine a conforming pixel structure of the same color as the repair pixel structure according to a preset rule.

[0009] Optionally, the step of determining whether the pixel structures of the same color adjacent to the abnormal pixel structure are normal includes: Determine whether there are normal pixel structures among the pixel structures of the same color adjacent to the abnormal pixel structure arranged along the data line direction and along the scan line direction; If so, the step of selecting the adjacent normal pixel structure of the same color as the repair pixel structure includes: If so, preferentially select the adjacent normal pixel structure of the same color as the repair pixel structure according to a first preset rule.

[0010] Optionally, the step of determining whether the pixel structures of the same color adjacent to the abnormal pixel structure are normal includes: Determine whether there are normal pixel structures among the pixel structures of the same color adjacent to the abnormal pixel structure arranged along the scan line direction; If so, the step of selecting the adjacent normal pixel structure of the same color as the repair pixel structure according to a preset rule includes: If so, preferentially select the adjacent normal pixel structure of the same color as the repair pixel structure according to a first preset rule. If not, determine whether the pixel structures of the same color adjacent to the abnormal pixel structure arranged along the data line direction are normal.

[0011] Optionally, in the step of connecting the pixel electrode of the abnormal pixel structure to the pixel electrode of the repaired pixel structure through a repair structure, the steps include: Selecting a section of the light-shielding electrode between the pixel electrode of the abnormal pixel structure and the pixel electrode of the repaired pixel structure as the light-shielding electrode connection part; Isolating the light-shielding electrode connection part from the light-shielding electrodes at other positions; Connecting one end of the light-shielding electrode connection part to the pixel electrode of the abnormal pixel structure through a first overlapping structure; Connecting the pixel electrode of the repaired pixel structure to the other end of the light-shielding electrode connection part through a second overlapping structure; Wherein, the light-shielding electrode connection part, the first overlapping structure, and the second overlapping structure form the repair structure.

[0012] The present application also discloses a display panel. The array substrate of the display panel includes: a plurality of scanning lines arranged at intervals and extending in the horizontal direction, a plurality of data lines arranged at intervals and extending in the vertical direction, and a plurality of pixel structures arranged in an array divided by the intersection of the plurality of scanning lines and the plurality of data lines; the array substrate further includes a repair structure, and the pixel electrode of the abnormal pixel structure is connected to the pixel electrode of the normal pixel structure through the repair structure; wherein, the color of the abnormal pixel structure is the same as the color of the normal pixel structure it is connected to.

[0013] Optionally, the repair structure includes a plurality of light-shielding electrodes, a first overlapping structure, and a second overlapping structure. The plurality of light-shielding electrodes are respectively arranged in one-to-one correspondence with the plurality of scanning lines and the plurality of data lines; the light-shielding electrodes between the abnormal pixel structure and the normal pixel structure are isolated by a plurality of isolation parts to form a light-shielding electrode connection part; the first overlapping structure is arranged between the abnormal pixel structure and the light-shielding electrode connection part, and the second overlapping structure is arranged between the normal pixel structure and the light-shielding electrode connection part.

[0014] Optionally, the first overlapping structure is arranged on the same layer as the pixel electrode of the abnormal pixel structure, and the second overlapping structure is arranged on the same layer as the pixel electrode of the normal pixel structure.

[0015] The present application also discloses a display device, including a backlight module and the display panel as described above. The backlight module is arranged on one side of the display panel to provide a backlight source for the display panel.

[0016] Due to process manufacturing reasons in the prior art, problems such as open circuits, short circuits, and TFT device failures may occur, resulting in dark spot defects in pixel points and affecting the display effect. The method for repairing a display panel of the present application includes the steps of: providing a display panel; detecting whether there is an abnormality in the pixel structure in the display panel; if so, according to a preset rule, selecting a repair pixel structure from the normal pixel structures for repairing the abnormal pixel structure; connecting the pixel electrode of the abnormal pixel structure and the pixel electrode of the repair pixel structure through a repair structure; wherein, the color of the abnormal pixel structure is the same as the color of the repair pixel structure. In this way, the signal provided by the normal pixel structure of the same color is transmitted to the abnormal pixel structure of the same color through the repair structure, and the abnormal pixel structure of the same color is repaired and lit, so as to realize one pixel electrode controlling two pixel structures, with simple operation and high repair stability. Description of the Drawings

[0017] The accompanying drawings included are used to provide a further understanding of the embodiments of the present application, which form a part of the specification, are used to illustrate the embodiments of the present application, and are used to explain the principle of the present application together with the text description. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings: Figure 1 is a schematic flow chart of the steps of the method for repairing a display panel provided by the present application; Figure 2 is Figure 1 a further schematic flow chart of step S2 in Figure 3 is Figure 2 a schematic flow chart of the steps after step S23 in Figure 4 is Figure 1 a further schematic flow chart of step S3 in Figure 5 is Figure 4 a further schematic flow chart of step S31 in Figure 6 is Figure 1 a schematic diagram of the specific steps of step S4 in Figure 7 is a schematic block diagram structure of the display panel provided by the present application; Figure 8 is a schematic cross-sectional structure diagram of the display panel along the corresponding scan line position provided by the present application; Figure 9 is a schematic cross-sectional structure diagram of the display panel along the corresponding data line position provided by the present application; Figure 10 It is a top - view structural schematic diagram of the array substrate of the present application; Figure 11 It is a schematic diagram of the steps for determining the normal pixel structure provided by the first embodiment of the present application; Figure 12 is Figure 11 A schematic diagram of the steps for selecting the normal pixel structure after step S241; Figure 13 It is a schematic diagram of the steps for determining the specific normal pixel structure provided by the first embodiment of the present application; Figure 14 is Figure 13 A schematic diagram of the steps for selecting the specific normal pixel structure after step S242; Figure 15 is Figure 14 A schematic diagram of the process steps for isolating the light - shielding electrode after step S312; Figure 16 is Figure 10 A partial enlarged structural schematic diagram of region A in; Figure 17 is Figure 16 A signal transmission schematic diagram along the scanning line direction in; Figure 18 is Figure 11 A schematic diagram of the steps for selecting the normal pixel structure after step S241; Figure 19 It is a schematic diagram of the steps for determining and selecting the normal pixel structure provided by the second embodiment of the present application; Figure 20 It is a structural schematic diagram of the array substrate provided by the third embodiment of the present application; Figure 21 It is a structural schematic diagram of the array substrate provided by the fourth embodiment of the present application; Figure 22 It is a structural schematic diagram of the array substrate provided by the fifth embodiment of the present application; Figure 23 It is a block - diagram structural schematic diagram of the display device provided by the present application.

[0018] Among them, 10 is a display device; 100 is a display panel; 110 is an array substrate; 120 is a scanning line; 130 is a data line; 140 is a pixel structure; 141 is a main pixel structure; 142 is a sub-pixel structure; 143 is a first pixel; 144 is a second pixel; 145 is a third pixel; 150 is a repair structure; 151 is a light-shielding electrode; 152 is a first overlapping structure; 153 is a second overlapping structure; 154 is an isolation part; 155 is a light-shielding electrode connection part; 156 is a repair area; 157 is a first light-shielding electrode; 158 is a second light-shielding electrode; 159 is a third light-shielding electrode; 160 is a fourth light-shielding electrode; 161 is a first isolation part; 162 is a second isolation part; 163 is a third isolation part; 164 is a fourth isolation part; 165 is a fifth isolation part; 166 is a sixth isolation part; 167 is a seventh isolation part; 168 is an eighth isolation part; 170 is a pixel electrode; 180 is a substrate; 181 is a first metal layer; 182 is an insulating layer; 183 is a second metal layer; 184 is a pixel layer; 185 is a light-shielding electrode layer; 186 is a color filter substrate; 187 is a base; 188 is a black matrix; 189 is a transparent electrode layer; 190 is a liquid crystal layer; 200 is a backlight module. Detailed implementation manners

[0019] It should be understood that the terms, the specific structures and functional details disclosed here are only for the purpose of describing specific embodiments, which are representative, but the present application can be specifically implemented in many alternative forms and should not be construed as being limited only to the embodiments set forth herein.

[0020] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating relative importance or implicitly indicating the quantity of the indicated technical features. Thus, unless otherwise specified, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features; the meaning of "a plurality" is two or more. In addition, terms indicating orientation or positional relationships such as "upper", "lower", "left", "right", "second direction", "first direction", etc. are described based on the orientation or relative positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present application. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0021] Figure 1 is a schematic flowchart of the process steps of the repair method for the display panel provided by the present application. As Figure 1 shown, the present application discloses a repair method for a display panel, including the steps of: S1: Provide a display panel; S2: Detect whether there is an abnormality in the pixel structure in the display panel; S3: If so, select, according to a preset rule, a repair pixel structure for repairing the abnormal pixel structure from the normal pixel structures; S4: Connect between the pixel electrode of the abnormal pixel structure and the pixel electrode of the repair pixel structure through a repair structure; Wherein, the color of the abnormal pixel structure is the same as the color of the normal pixel structure connected thereto.

[0022] In the prior art, due to process reasons, there will be defects such as open circuits, short circuits, and TFT device failures, resulting in dark spot defects in the pixel structure and affecting the display effect. The repair method of the display panel of the present application includes the steps of: providing a display panel; detecting whether there is an abnormality in the pixel structure in the display panel; if so, selecting, according to a preset rule, a repair pixel structure for repairing the abnormal pixel structure from the normal pixel structures; connecting between the pixel electrode of the abnormal pixel structure and the pixel electrode of the repair pixel structure through a repair structure; wherein, the color of the abnormal pixel structure is the same as the color of the repair pixel structure, so that the signal provided by the normal pixel structure of the same color is transmitted to the abnormal pixel structure of the same color through the repair structure, and the abnormal pixel structure of the same color is repaired and lit, so as to realize that one pixel electrode controls two pixel structures, with simple operation and high repair stability.

[0023] Wherein, the abnormality refers to the existence of a dark spot defect in the pixel structure. Figure 2 Yes Figure 1 is a further step flow schematic diagram of step S2 in Figure 2 As shown, the step of detecting whether there is an abnormality in the pixel structure in the display panel includes the steps of: S21: Detect the display panel; S22: Determine the position of the abnormal pixel structure; and S23: Locate the position of the abnormal pixel structure.

[0024] In this way, it is possible to repair the abnormal pixel structure more precisely, with high repair efficiency. Specifically, the display panel is placed on a detection machine, and the display panel can be globally photographed by setting a DDC imaging device. The photographed image is uploaded to the system, and the overall coordinate map in the display panel is correspondingly displayed in the system, and then it is enlarged and viewed on the system to locate the position of the bad pixel, and the position of the bad pixel is marked to facilitate precise repair.

[0025] Figure 3 Yes Figure 2Schematic diagram of the subsequent step process after step S23 in [reference], as Figure 3 shown. After the step of positioning the position of the abnormal pixel structure, the following steps are further included: S24: Determine whether the pixel structures of the same color adjacent to the abnormal pixel structure are normal; Figure 4 Yes Figure 1 Schematic diagram of the further step process of step S3 in [reference], as Figure 4 shown. If so, the step of selecting a repair pixel structure for repairing the abnormal pixel structure from the normal pixel structures according to a preset rule includes: S31: If so, select the adjacent normal pixel structure of the same color as the repair pixel structure according to a preset rule.

[0026] In this way, connection repair is performed when the adjacent pixel structures of the same color are normal. At this time, the repair signal transmission path is the shortest and the repair speed is fast.

[0027] Figure 5 Yes Figure 4 Schematic diagram of the further step process of step S31 in [reference], as Figure 5 shown. Of course, the screening range can also be expanded. When there is no normal pixel structure among the pixel structures of the same color adjacent to the abnormal pixel structure, the step of selecting a repair pixel structure for repairing the abnormal pixel structure from the normal pixel structures according to a preset rule further includes the following steps: S32: If not, re-determine the conforming pixel structures of the same color according to a preset rule to be used as the repair pixel structure.

[0028] Figure 6 Yes Figure 1 Schematic diagram of the specific steps of step S4 in [reference], as Figure 6 shown. Specifically, in the step of connecting the pixel electrode of the abnormal pixel structure and the pixel electrode of the repair pixel structure through a repair structure, the following steps are included: S41: Select a section of the light-shielding electrode between the pixel electrode of the abnormal pixel structure and the pixel electrode of the repair pixel structure as the light-shielding electrode connection part; S42: Isolate the light-shielding electrode connection part from the light-shielding electrodes at other positions; S43: Connect one end of the pixel electrode of the abnormal pixel structure and the light-shielding electrode connection part through a first overlapping structure; S44: Connect the pixel electrode of the repair pixel structure and the other end of the light-shielding electrode connection part through a second overlapping structure; Among them, the light-shielding electrode connection part, the first overlapping structure, and the second overlapping structure form the repair structure.

[0029] The light-shielding electrode of this application is DBS (DataLineBMLess) ITO, which is an ITO (i.e., indium tin oxide) trace covering the data line and the scan line. The width of the ITO trace is slightly wider than that of the data line and the scan line. These ITO traces are connected to the COM, that is, the common electrode. When the panel is working normally, the electric field formed by these ITO-COM electrodes can keep the liquid crystal molecules in a non-deflected state, thus achieving the purpose of light shielding. That is, by using the light-shielding electrode originally existing on the array substrate as an overlapping bridge, the abnormal pixel structure is connected to the normal pixel structure of the same color to achieve the repair purpose. In this way, no additional structure needs to be added, and the repair cost is reduced.

[0030] Figure 7 It is a schematic block diagram structure of the display panel provided by this application. Figure 8 It is a schematic cross-sectional structure of the display panel provided by this application along the position of the corresponding scan line. Figure 9 It is a schematic cross-sectional structure of the display panel provided by this application along the position of the corresponding data line. This application also discloses a display panel 100, which is repaired by the above repair method. The display panel includes a color filter substrate 186 and an array substrate 110 arranged opposite to each other, and a liquid crystal layer 190 located between the color filter substrate 186 and the array substrate 110. The color filter substrate 186 includes a substrate 187, a black matrix 188 provided on the substrate 187, and a transparent electrode layer 189 provided on the side of the black matrix 188 away from the substrate 187.

[0031] Figure 10 It is a schematic top view structure of the array substrate of this application, as Figure 10 shown, combined with Figures 8 - 9The array substrate 110 includes: a substrate 180, a first metal layer 181, an insulating layer 182, a second metal layer 183, a pixel layer 184 and a light shielding electrode layer 185, wherein the first metal layer 181 is arranged above the substrate 180, the second metal layer 183 is arranged above the first metal layer 181, the insulating layer 182 is arranged between the first metal layer 181 and the second metal layer 183, the pixel layer 184 is arranged above the first metal layer 181 and the second metal layer 183, the light shielding electrode layer 185 is arranged on the pixel layer 184, and the first metal layer 181 includes a plurality of scanning lines extending in a horizontal direction and arranged at intervals. Line 120, the second metal layer 183 includes a plurality of data lines 130 extending in the vertical direction and arranged at intervals, the pixel layer 184 includes a plurality of pixel structures 140, the shading electrode layer 185 includes a plurality of shading electrodes 151, the plurality of scanning lines 120 and the plurality of data lines 130 are arranged alternately, the plurality of pixel structures 140 are arranged one-to-one between the scanning lines 120 and the data lines 130, the plurality of shading electrodes 151 are arranged one-to-one with the plurality of scanning lines and the plurality of data lines, and the pixel electrode 170 of the abnormal pixel structure 140 is connected to the pixel electrode 170 of the normal pixel structure 140 via a repair structure 150.

[0032] Among them, the repair structure 150 includes a partial shading electrode 151. The shading electrode 151 at the corresponding position can be selected according to the position of the abnormal pixel structure 140, and then the overlapping structure is used to form the repair structure 150. The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0033] First embodiment: Combination Figures 8 - 9 , the black matrix 188 is continuously arranged at the position corresponding to the scan line 120 on the color film substrate 186, and the black matrix 188 is arranged only at the position corresponding to the data line 130 where the data line 130 overlaps with the scan line 120. It can be seen that the area of ​​the black matrix 188 arranged at the scan line 120 position is relatively large relative to the data line 130 position. With the shielding of the black matrix 188, light leakage is not likely to occur. Therefore, when the main pixel structure 141 is abnormal, it can be preferentially selected along the direction of the scan line 120 to use the repair structure 150 to overlap with the normal main pixel structure of the same color adjacent to the abnormal main pixel structure to achieve the purpose of repair. Specifically: Figure 11 is a schematic diagram of the steps of determining a normal pixel structure provided by the first embodiment of the present application, such as Figure 11 As shown, therefore, the step of determining whether the pixel structure of the same color adjacent to the abnormal pixel structure is normal includes: S241: Determine whether there are normal pixel structures among the pixel structures of the same color that are arranged along the data line direction and adjacent to the abnormal pixel structure along the scanning line direction; Figure 12 Yes Figure 11 Schematic diagram of the step of selecting a normal pixel structure after the determination step S241, as Figure 12 shown, the step of selecting the adjacent normal pixel structure of the same color as the repair pixel structure includes: S311: If so, according to the first preset rule, preferentially select the normal pixel structure of the same color that is arranged along the scanning line direction and adjacent to the abnormal pixel structure as the repair pixel structure.

[0034] Specifically, among the pixel structures formed by the cooperation of the scanning line and the data line, there are main pixel structures and auxiliary pixel structures. The abnormal pixel structure and the normal pixel structure both refer to the main pixel structure; along the arrangement direction of the scanning line, assume that the abnormal pixel structure is located in the Nth column and the Mth row in the display panel, where N is an odd number other than the first column and the last column of the pixel structures of the same color; The main pixel structure includes multiple columns of first pixels, multiple columns of second pixels, and multiple columns of third pixels that are sequentially arranged at intervals. Taking the first pixel of the main pixel structure in the Nth column and the Mth row as an example of abnormality: a repair area is formed between the abnormal first pixel and the normal first pixel. The repair area includes a first light-shielding electrode, a second light-shielding electrode, a third light-shielding electrode, and a fourth light-shielding electrode. The first light-shielding electrode is arranged along the direction of the scanning line, and the second light-shielding electrode, the third light-shielding electrode, and the fourth light-shielding electrode are arranged along the direction of the data line and are respectively vertically and crosswise arranged with the first light-shielding electrode; Figure 13 Schematic diagram of the step of determining a specific normal pixel structure provided by the first embodiment of the present application, as Figure 13 shown, the step of determining whether the pixel structure of the same color adjacent to the abnormal pixel structure is normal includes: S242: Determine whether the first pixel in the (N - 3)th column and the Mth row and the first pixel in the (N + 3)th column and the Mth row are normal pixel structures; Figure 14 Yes Figure 13 Schematic diagram of the step of selecting a specific normal pixel structure after the determination step S242, as Figure 14 shown, if so, the step of selecting the adjacent normal pixel structure of the same color as the repair pixel structure includes: S312: If so, according to the first preset rule, preferentially select the first pixel in the N-3rd column and the Mth row as the repair pixel structure; according to usage habits, the pixel structure on the right is likely to be selected, so the first pixel in the N+3rd column and the Mth row can be reserved as a spare repair pixel structure for repairing abnormal pixel structures at other positions in the future.

[0035] Among them, Figure 15 is Figure 14 a schematic flow chart of the step of isolating the light-shielding electrode after the selection step S312, as Figure 15 shown. Taking the selection of the normal first pixel in the N-3rd column and the Mth row as the repair pixel as an example for illustration: The step of isolating the connection part of the light-shielding electrode between the pixel electrode of the pixel structure in the Nth column and the Mth row and the pixel electrode of the pixel structure in the N-3rd column and the Mth row from the light-shielding electrodes at other positions includes: S313: Form a first isolation part between the first pixel corresponding to the first light-shielding electrode in the N-3rd column and the Mth row and the first pixel in the N-3rd column and the M-1th row; S314: Form a second isolation part between the first pixel corresponding to the first light-shielding electrode in the Nth column and the Mth row and the first pixel in the Nth column and the M-1th row; S315: Form a third isolation part between the first pixel corresponding to the second light-shielding electrode in the N-3rd column and the Mth row and the second pixel in the N-2nd column and the Mth row; S316: Form a fourth isolation part between the first pixel corresponding to the second light-shielding electrode in the N-3rd column and the M-1th row and the second pixel in the N-2nd column and the M-1th row; S317: Form a fifth isolation part between the second pixel corresponding to the third light-shielding electrode in the N-2nd column and the Mth row and the third pixel in the N-1st column and the Mth row; S318: Form a sixth isolation part between the second pixel corresponding to the third light-shielding electrode in the N-2nd column and the M-1th row and the third pixel in the N-1st column and the M-1th row; S319: Form a seventh isolation part between the third pixel corresponding to the fourth light-shielding electrode in the N-1st column and the Mth row and the first pixel in the Nth column and the Mth row; S320: Form an eighth isolation part between the third pixel corresponding to the fourth light-shielding electrode in the N-1st column and the M-1th row and the first pixel in the Nth column and the M-1th row, so that part of the first light-shielding electrode, part of the second light-shielding electrode, part of the third light-shielding electrode, and part of the fourth light-shielding electrode are combined to form the light-shielding electrode connection part.

[0036] Then, the pixel electrode of the first pixel in the M-th row and the (N-3)-th column is connected to one end of the light-shielding electrode connection portion through the first overlapping structure; the pixel electrode of the first pixel in the M-th row and the N-th column is connected to the other end of the light-shielding electrode connection portion through the second overlapping structure. In this way, the signal of the first pixel in the M-th row and the (N-3)-th column is transmitted to the first pixel in the M-th row and the N-th column through the first overlapping structure, the light-shielding electrode connection portion, and the second overlapping structure, and the dark point repair of the abnormal first pixel in the M-th row and the N-th column can be achieved.

[0037] Among them, on the repair machine table, laser technology can be used to perform laser treatment on the light-shielding electrode at the corresponding position, and the light-shielding electrode at this position is cut off by laser to form the corresponding isolation portion; specifically, default laser parameters are set on the system of the repair machine table, and the width of laser cutting is generally set between 5um and 50um. Usually, the width of laser cutting during repair will be in the range of 10um to 20um according to the conditions of different positions. Then, the operator manually frames the position of the light-shielding electrode that needs to be laser-cut. The framed laser range is generally smaller than the default laser range, and the range during laser cutting will be controlled between 8um and 10um to avoid too large a notch formed by the laser, reduce the influence of light leakage, and the position of the laser needs to be as close as possible to the non-transparent area for operation. The laser can be performed at a rate of about 30um / s, and multiple positions can be synchronized to save operation time. The light-shielding electrode cut off by the laser is washed away during the cleaning stage before the subsequent process, and will not affect the subsequent process.

[0038] After all the laser operations are completed, fixed-point INK is performed through the corresponding nozzle head on the repair machine table to perform the silver-spitting action to form the first overlapping structure and the second overlapping structure. During the silver-spitting action, baking and curing can be used to enhance the stability of the overlap between the first overlapping structure and the second overlapping structure and the pixel electrode and the light-shielding electrode connection portion respectively. In order to ensure accurate positioning, the high-rate lens on the repair machine table can be used for magnification before operation. These do not belong to the key inventions of this application and will not be elaborated here.

[0039] Specifically, the formed repair structure 150 includes a plurality of light-shielding electrodes 151, a first overlapping structure 152, and a second overlapping structure 153. The plurality of light-shielding electrodes 151 are respectively arranged in one-to-one correspondence with the plurality of scanning lines 120 and the plurality of data lines 130; The light-shielding electrode 151 between the abnormal pixel structure 140 and the normal pixel structure 140 is isolated by a plurality of isolation portions 154 to form a light-shielding electrode connection portion 155; the first overlapping structure 152 is disposed between the abnormal pixel structure 140 and the light-shielding electrode connection portion 155, and the second overlapping structure 153 is disposed between the normal pixel structure 140 and the light-shielding electrode connection portion 155.

[0040] The pixel structure 140 includes a plurality of columns of first pixels 143, a plurality of columns of second pixels 144, and a plurality of columns of third pixels 145 that are sequentially arranged at intervals. Let the abnormal pixel structure 140 be the first pixel 143 located in the Nth column and the Mth row, where N is an odd number other than the first column and the last column of the first pixel 143; the normal first pixel 143 is located in the (N - 3)th column and the Mth row.

[0041] Figure 16 Yes Figure 10 Schematic diagram of a partial enlarged structure of area A in, as Figure 16 shown, a repair area 156 is formed between the abnormal first pixel 143 and the normal first pixel 143. The repair area 156 includes a first light-shielding electrode 157, a second light-shielding electrode 158, a third light-shielding electrode 159, and a fourth light-shielding electrode 160. The first light-shielding electrode 157 is arranged along the direction of the scanning line 120, and the second light-shielding electrode 158, the third light-shielding electrode 159, and the fourth light-shielding electrode 160 are arranged along the direction of the data line 130 and are respectively arranged perpendicular to and intersecting the first light-shielding electrode 157.

[0042] The isolation part 154 includes a first isolation part 161, a second isolation part 162, a third isolation part 163, a fourth isolation part 164, a fifth isolation part 165, a sixth isolation part 166, a seventh isolation part 167, and an eighth isolation part 168. The first isolation part 161 is disposed between the first pixels 143 corresponding to the N - 3rd column and the Mth row and the first pixels 143 corresponding to the N - 3rd column and the M - 1th row of the first light-shielding electrode 157. The second isolation part 162 is disposed between the first pixels 143 corresponding to the Nth column and the Mth row and the first pixels 143 corresponding to the Nth column and the M - 1th row of the first light-shielding electrode 157. The third isolation part 163 is disposed between the first pixels 143 corresponding to the N - 3rd column and the Mth row of the second light-shielding electrode 158 and the second pixels 144 corresponding to the N - 2nd column and the Mth row. The fourth isolation part 164 is disposed between the first pixels 143 corresponding to the N - 3rd column and the M - 1th row of the second light-shielding electrode 158 and the second pixels 144 corresponding to the N - 2nd column and the M - 1th row. The fifth isolation part 165 is disposed between the second pixels 144 corresponding to the N - 2nd column and the Mth row of the third light-shielding electrode 159 and the third pixels 145 corresponding to the N - 1st column and the Mth row. The sixth isolation part 166 is disposed between the second pixels 144 corresponding to the N - 2nd column and the M - 1th row of the third light-shielding electrode 159 and the third pixels 145 corresponding to the N - 1st column and the M - 1th row. The seventh isolation part 167 is disposed between the third pixels 145 corresponding to the N - 1st column and the Mth row of the fourth light-shielding electrode 160 and the first pixels 143 corresponding to the Nth column and the Mth row. The eighth isolation part 168 is disposed between the third pixels 145 corresponding to the N - 1st column and the M - 1th row of the fourth light-shielding electrode 160 and the first pixels 143 corresponding to the Nth column and the M - 1th row.

[0043] In this way, through the first isolation part 161, the second isolation part 162, the third isolation part 163, the fourth isolation part 164, the fifth isolation part 165, the sixth isolation part 166, the seventh isolation part 167, and the eighth isolation part 168, the first light-shielding electrode 157, the second light-shielding electrode 158, the third light-shielding electrode 159, and the fourth light-shielding electrode 160 are partially isolated within the repair area 156 to form the light-shielding electrode connection part 155.

[0044] Figure 17 Yes Figure 16 is a schematic diagram of signal transmission in the scanning line direction, as Figure 17 shown, combined with Figure 16 , Figure 16The direction of the arrow in [description] is the scanning line direction. Among them, the first overlapping structure 152 is arranged on the same layer as the pixel electrode 170 of the abnormal pixel structure 140, and the second overlapping structure 153 is arranged on the same layer as the pixel electrode 170 of the normal pixel structure 140. Through the light-shielding electrode connection part 155, the first overlapping structure 152 and the second overlapping structure 153, the abnormal pixel structure 140 is connected to the adjacent normal pixel structure 140 to achieve pixel dark point repair. No additional structural design is required inside the display panel 100, so as to save the repair cost and improve the repair effect.

[0045] Of course, for repairing the first pixel in the Nth column and the Mth row that is abnormal, the first pixel in the (N + 3)th column and the Mth row can also be selected. It only needs to form an isolation part at the corresponding position on the light-shielding electrode between the first pixel in the Nth column and the Mth row and the first pixel in the (N + 3)th column and the Mth row to cooperate with the formation of the light-shielding electrode connection part. The specific steps are the same as those for connecting through the first pixel in the (N - 3)th column and the Mth row, and will not be elaborated here.

[0046] In addition, if the first pixel in the (N - 3)th column and the Mth row is normal and the first pixel in the (N + 3)th column and the Mth row is abnormal, then select to connect between the first pixel in the (N - 3)th column and the Mth row and the abnormal first pixel in the Nth column and the Mth row through the repair structure; if the first pixel in the (N - 3)th column and the Mth row is abnormal and the first pixel in the (N + 3)th column and the Mth row is normal, then select to connect between the first pixel in the (N + 3)th column and the Mth row and the abnormal first pixel in the Nth column and the Mth row through the repair structure.

[0047] Similarly, when the abnormal pixel structure is in the Nth column and N is the first column, it is determined whether the pixel structure of the same color in the (N + 3)th column on the right along the scanning line direction is a normal pixel structure. If it is normal, then select the pixel structure of the same color in the (N + 3)th column as the repair pixel structure to perform dark point repair on it; when the abnormal pixel structure is in the Nth column and N is the last column, it is determined whether the pixel structure of the same color in the (N - 3)th column on the left along the scanning line direction is a normal pixel structure. If it is normal, then select the pixel structure of the same color in the (N - 3)th column as the repair structure to perform dark point repair on it. And so on, which will not be elaborated here.

[0048] Figure 18 Yes Figure 11 Schematic diagram of the step of selecting a normal pixel structure after step S241 is determined, as Figure 18 shown. And when there is no normal pixel structure among the adjacent pixel structures of the same color arranged along the scanning line direction, the screening range can also be expanded, specifically including the steps: S321: If not, then according to the second preset rule, select the normal pixel structure of the same color adjacent to the abnormal pixel structure arranged along the data line direction as the repair pixel structure; S322: If there are no normal pixel structures among the pixel structures of the same color adjacent to the abnormal pixel structure arranged along the scanning line direction and along the data line direction, then expand the screening range according to the third preset rule.

[0049] Among them, the third preset rule may be to determine whether there are normal pixel structures around the abnormal pixel structure from near to far, and then preferentially select the nearer normal pixel structure as the repair pixel structure.

[0050] When selecting the light-shielding electrode 151 as the repair structure in the direction of the data line 130, when cutting the light-shielding electrode 151 to form an isolation part, the laser cut is set close to the non-light-transmitting area, or the laser cut is set at the overlapping position of light-blocking devices such as thin-film transistors; and at this time, the size of the laser cut can be controlled between 5um and 8um, and try to ensure that the isolation part is small to avoid light leakage problems.

[0051] If there is no black matrix 188 on the color filter substrate 186 corresponding to the formed light-shielding electrode connection part 155, and the laser cut is close to the light-transmitting area, a black matrix 188 can be manually coated at the corresponding repair structure 150 position to relatively reduce light leakage to achieve a better repair effect. The thickness of the coated black matrix is controlled between 0.3um and 1.2um to avoid too high a gap after the array substrate 110 and the color filter substrate 186 are laminated to increase the cell thickness, ensure the thinning of the display panel 100, and avoid that too high a thickness of the black matrix will block part of the light emitted by the backlight module, thereby ensuring the overall brightness and light transmittance of the display panel.

[0052] Second Embodiment: Figure 19 It is a schematic diagram of the steps for determining and selecting a normal pixel structure provided by the second embodiment of the present application. As Figure 19 shown, as the second embodiment of the present application, the difference between this embodiment and the first embodiment is that the step of determining whether the pixel structure of the same color adjacent to the abnormal pixel structure is normal includes: S241: Determine whether there is a normal pixel structure among the pixel structures of the same color adjacent to the abnormal pixel structure arranged along the scanning line direction; If so, then the step of selecting the adjacent normal pixel structure of the same color as the repair pixel structure according to the preset rule includes: S311: If so, select, according to the first preset rule, the normal pixel structures of the same color that are arranged along the scanning line direction and adjacent to the abnormal pixel structure as the repair pixel structures; S312: If not, determine whether there are normal pixel structures among the pixel structures of the same color that are arranged along the data line direction and adjacent to the abnormal pixel structure; S313: If so, select, according to the second preset rule, the normal pixel structures of the same color that are arranged along the data line direction and adjacent to the abnormal pixel structure as the repair pixel structures.

[0053] That is, first detect and determine whether there are normal pixel structures of the same color arranged in the scanning line direction. If there are, directly select them for repair, thus omitting the step of detecting the data line direction and achieving faster repair efficiency.

[0054] Among them, the second preset rule may be to preferentially select the adjacent normal pixel structures located below the abnormal pixel structure as the repair pixel structures. Of course, it can also be adjusted according to the actual repair situation and is not limited here.

[0055] Third Embodiment: Figure 20 It is a schematic structural diagram of an array substrate provided by the third embodiment of the present application. As shown in Figure 20 As shown, as the third embodiment of the present application, the difference between this embodiment and the first embodiment is that if it is detected that the first pixel, the second pixel, and the third pixel in the Nth column, the (N + 1)th column, and the (N + 2)th column of the Mth row of abnormal pixels are all abnormal. At this time, if the first pixel, the second pixel, and the third pixel are repaired using the light-shielding electrode 151 along the scanning line direction, two of the abnormal pixels will need to share the light-shielding electrode 151, which will affect the repair effect. Then, when the surrounding adjacent pixel structures of the same color are all normal, it can be considered to isolate the light-shielding electrode 151 between the second pixel 144 in the (N + 1)th column and the second pixel 144 in the (N + 1)th column of the (M + 2)th row or the (M - 2)th row. Specifically, as shown in Figure 20As shown, taking the second pixel 144 at the (M + 2)-th row and the (N + 1)-th column as an example for illustration. At this time, only by setting the first isolation part 161 and the second isolation part 162, a light-shielding electrode connection part 155 can be formed on the light-shielding electrode 151 between the second pixel 144 at the M-th row and the (N + 1)-th column and the second pixel 144 at the (M + 2)-th row and the (N + 1)-th column. Then, through the first overlapping structure 152, the pixel electrode of the abnormal second pixel 144 at the M-th row and the (N + 1)-th column is connected to one end of the light-shielding electrode connection part 155, and through the second overlapping structure 153, the pixel electrode of the normal second pixel 144 at the (M + 2)-th row and the (N + 1)-th column is connected to the other end of the light-shielding electrode connection part 155, connecting these two second pixels 144 to complete the repair of the abnormal second pixel 144 at the M-th row and the (N + 1)-th column. For the first pixel 143 at the M-th row and the N-th column, the first pixel 143 at the M-th row and the (N - 3)-th column can be selected for connection and repair, and for the third pixel 145 at the M-th row and the (N + 3)-th column, the third pixel 145 at the M-th row and the (N + 6)-th column can be selected for connection and repair.

[0056] Among them, the dotted line position in the figure indicates the area where a black matrix can be manually coated at this time to avoid the light leakage problem. The thickness of the coated black matrix is controlled between 0.3 um and 1.2 um, so as to avoid an excessive gap after the array substrate 110 and the color filter substrate 186 are laminated, increase the cell thickness, ensure the thinning of the display panel 100, and avoid that the excessive thickness of the black matrix will block part of the light emitted by the backlight module, thereby ensuring the overall brightness and light transmittance of the display panel.

[0057] Fourth Embodiment: Figure 21 is a schematic structural diagram of an array substrate provided by the fourth embodiment of the present application. As Figure 21 shown, as the fourth embodiment of the present application, the difference between this embodiment and the third embodiment is that when both the second pixel 144 at the (M + 2)-th row and the (N + 1)-th column and the second pixel 144 at the (M - 2)-th row and the (N + 1)-th column are abnormal, and the second pixel 144 at the (M - 1)-th row and the (N + 1)-th column is normal, the second pixel 144 at the (M - 1)-th row and the (N + 1)-th column can be selected as the repair pixel. Then, the light-shielding electrode along the scanning line direction between the second pixel 144 at the (M - 1)-th row and the (N + 1)-th column and the second pixel 144 at the M-th row and the (N + 1)-th column is isolated from the light-shielding electrodes at other positions to form a light-shielding electrode connection part. Then, through the first overlapping structure, the pixel electrode of the second pixel at the (M - 1)-th row and the (N + 1)-th column is overlapped and connected to the light-shielding electrode connection part, and through the second overlapping structure, the pixel electrode of the second pixel at the M-th row and the (N + 1)-th column is overlapped and connected to the light-shielding electrode connection part, so as to realize using the second pixel at the (M - 1)-th row and the (N + 1)-th column to repair the second pixel at the M-th row and the (N + 1)-th column, which is also feasible.

[0058] Of course, when pixel structure anomalies occur in multiple locations within the display panel 100, it is necessary to determine whether there is still value in repair after detection. If the repair cost is too high or the repair effect is too poor, reaching the scrapping standard, it will be scrapped.

[0059] Fifth Embodiment: Figure 22 is a schematic structural diagram of an array substrate provided by the fifth embodiment of the present application. As Figure 22 shown, as the fifth embodiment of the present application, what is different from the first, second, third, and fourth embodiments of the present application is that the abnormal pixel structure 140 is the main pixel structure 141, and the normal pixel structure 140 is the auxiliary pixel structure 142. Between the pixel electrode of the abnormal main pixel structure 141 and the pixel electrode of the normal auxiliary pixel structure 142, they are directly connected through the first lap joint structure 152 to achieve the repair of the dark spots of the abnormal pixel structure.

[0060] Figure 23 is a schematic block diagram structure of a display device provided by the present application. As Figure 23 shown, the present application also discloses a display device 10, including the display panel 100 and the backlight module 200 as described above. The backlight module 200 is disposed on one side of the display panel 100 to provide a backlight source for the display panel 100.

[0061] It should be noted that the limitations of each step involved in this solution do not, on the premise of not affecting the implementation of the specific solution, determine the order of execution of the steps. The steps written in the front can be executed first, or can be executed later, or even can be executed simultaneously. As long as the solution can be implemented, it should be regarded as falling within the protection scope of the present application.

[0062] It should be noted that the inventive concept of the present application can form a very large number of embodiments. However, due to the limited space of the application documents, it is impossible to list them all. Therefore, on the premise of not conflicting, the above-described embodiments or technical features can be arbitrarily combined to form new embodiments. After the combination of each embodiment or technical feature, the original technical effect will be enhanced.

[0063] The above content is a further detailed description of the present application in combination with specific optional implementation manners. It cannot be determined that the specific implementation of the present application is only limited to these descriptions. For those of ordinary skill in the technical field to which the present application belongs, without departing from the concept of the present application, several simple deductions or substitutions can still be made, and all should be regarded as falling within the protection scope of the present application.

Claims

1. A repair method for a display panel, characterized in that, Including the steps of: Providing a display panel; Detecting whether there is an abnormality in the pixel structure of the display panel; If so, selecting, according to a preset rule, a repair pixel structure from the normal pixel structures for repairing the abnormal pixel structure; Connecting the pixel electrode of the abnormal pixel structure and the pixel electrode of the repair pixel structure through a repair structure; Wherein, the color of the abnormal pixel structure is the same as the color of the repair pixel structure.

2. The repair method of the display panel according to claim 1, characterized in that, The step of detecting whether there is an abnormality in the pixel structure of the display panel includes the steps of: Detecting the display panel; Determining the position of the abnormal pixel structure; And Locating the position of the abnormal pixel structure.

3. The repair method of the display panel according to claim 2, characterized in that, After the step of locating the position of the abnormal pixel structure, there are also the steps of: Determining whether the pixel structures of the same color adjacent to the abnormal pixel structure are normal; The step of, if so, selecting, according to a preset rule, a repair pixel structure from the normal pixel structures for repairing the abnormal pixel structure includes: If so, selecting the adjacent normal pixel structure of the same color as the repair pixel structure according to a preset rule; If not, re-determining, according to a preset rule, a conforming pixel structure of the same color as the repair pixel structure.

4. The repair method of the display panel according to claim 3, characterized in that, The step of determining whether the pixel structures of the same color adjacent to the abnormal pixel structure are normal includes: Determining whether there are normal pixel structures among the pixel structures of the same color adjacent to the abnormal pixel structure arranged along the data line direction and along the scan line direction; The step of, if so, selecting the adjacent normal pixel structure of the same color as the repair pixel structure includes: If so, preferentially selecting, according to a first preset rule, the normal pixel structure of the same color adjacent to the abnormal pixel structure arranged along the scan line direction as the repair pixel structure.

5. The repair method of the display panel according to claim 3, characterized in that, The step of determining whether the pixel structures of the same color adjacent to the abnormal pixel structure are normal includes: Determining whether there are normal pixel structures among the pixel structures of the same color adjacent to the abnormal pixel structure arranged along the scan line direction; The step of, if so, selecting the adjacent normal pixel structure of the same color as the repair pixel structure includes: If so, selecting, according to a first preset rule, the normal pixel structure of the same color adjacent to the abnormal pixel structure arranged along the scan line direction as the repair pixel structure; If not, determining whether the pixel structures of the same color adjacent to the abnormal pixel structure arranged along the data line direction are normal.

6. The repair method of the display panel according to claim 4 or 5, characterized in that In the step of connecting the pixel electrode of the abnormal pixel structure and the pixel electrode of the repair pixel structure through a repair structure, it includes the steps of: Selecting a section of the light-shielding electrode between the pixel electrode of the abnormal pixel structure and the pixel electrode of the repair pixel structure as the light-shielding electrode connection part; Isolating the light-shielding electrode connection part from the light-shielding electrodes at other positions; Connect one end of the pixel electrode of the abnormal pixel structure to one end of the light-shielding electrode connection part through a first lap joint structure; Connect the pixel electrode of the repaired pixel structure to the other end of the light-shielding electrode connection part through a second lap joint structure; Wherein, the light-shielding electrode connection part, the first lap joint structure, and the second lap joint structure form the repair structure.

7. A display panel is repaired by using the repair method of the display panel according to any one of claims 1-6. The array substrate of the display panel comprises: A plurality of scan lines arranged at intervals and extending in the horizontal direction, a plurality of data lines arranged at intervals and extending in the vertical direction, and a plurality of pixel structures arranged in an array divided by the intersection of the plurality of scan lines and the plurality of data lines; characterized in that, The array substrate further includes a repair structure, and the pixel electrodes of the abnormal pixel structures are connected to the pixel electrodes of the normal pixel structures through the repair structure; Wherein, the color of the abnormal pixel structure is the same as the color of the normal pixel structure to which it is connected.

8. The display panel according to claim 7, wherein The repair structure includes a plurality of light-shielding electrodes, a first lap joint structure, and a second lap joint structure, and the plurality of light-shielding electrodes are respectively arranged in one-to-one correspondence with the plurality of scan lines and the plurality of data lines; The light-shielding electrodes between the abnormal pixel structure and the normal pixel structure are isolated by an isolation part to form a light-shielding electrode connection part; The first lap joint structure is arranged between the pixel electrode of the abnormal pixel structure and the light-shielding electrode connection part, and the second lap joint structure is arranged between the pixel electrode of the normal pixel structure and the light-shielding electrode connection part.

9. The display panel according to claim 8, wherein, The first lap joint structure is arranged on the same layer as the pixel electrode of the abnormal pixel structure, and the second lap joint structure is arranged on the same layer as the pixel electrode of the normal pixel structure.

10. A display device, characterized in that, Comprising a backlight module and a display panel according to any one of claims 7 or 8 or 9, wherein the backlight module is arranged on one side of the display panel to provide a backlight source for the display panel.

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