A display panel repair method, system, and display device

Abstract

The present invention discloses a display panel repair method, system and display device, including: determining that there are pixel defects in a display panel after the installation of a driving chip is completed; obtaining a pixel data compensation table generated during the test phase of the display panel; after confirming that the pixel compensation data of the first number of pixel columns in the pixel data compensation table is abnormal, determining the cause of the pixel defects in the display panel as external defects; the external defects include tape automated bonding connection defects and driving chip defects, and the first number is the number of pixel columns driven by the driving chip. The present invention can solve the problem of excessive rejection rate caused by directly discarding a display panel with defective pixels in a whole column, and can detect that the defective pixels in a whole column of the display panel are caused by external defects such as TAB process or driving chip, which helps to repair the display panel when there are array defects, reduce the rejection rate of the panel, and improve the yield of the product.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of display technologies, and in particular, to a method, a system, and a display device for repairing a display panel. Background Art

[0002] A liquid crystal display (LCD) device can control the light transmittance of liquid crystal cells arranged in a matrix in response to a video signal to display an image corresponding to the video signal on a liquid crystal display panel. The LCD device includes: a liquid crystal display panel having a plurality of liquid crystal cells arranged in an active matrix array; and a plurality of driving integrated circuits (ICs) for driving these liquid crystal cells.

[0003] The prior art has the following defects: After the production of an existing liquid crystal display panel, a series of test processes including a light-emitting test need to be carried out, and it will be detected that some display panels have problems of defective pixels in an entire column. For existing display panels with defective pixels in an entire column, due to a large number of defective pixels and the inability to perform laser repair, etc., they are usually directly discarded, resulting in too many defective products and high costs. Summary of the Invention

[0004] The present invention provides a method, a system, and a display device for repairing a display panel to detect and repair abnormal pixels in an entire column, improve the yield of products, and reduce the rejection rate of the panel.

[0005] In a first aspect, an embodiment of the present invention provides a method for repairing a display panel, including:

[0006] Determine that there are pixel defects in a display panel after the installation of a driving chip is completed, where the pixel defects include at least one column of defective pixels. Herein, the display panel is connected to the driving chip, the display panel, and a printed circuit board through a connector by a tape automated bonding process;

[0007] Obtain a pixel data compensation table generated by the display panel during a test phase;

[0008] After confirming that there are abnormal pixel compensation data for a first number of pixel columns in the pixel data compensation table, determine that the cause of the pixel defects in the display panel is an external defect; wherein the external defect includes tape automated bonding connection defect and driving chip defect, and the first number is the number of pixel columns driven by the driving chip.

[0009] Optionally, after determining that the cause of the pixel defects in the display panel is an external defect after confirming that there are abnormal pixel compensation data for a first number of pixel columns in the pixel data compensation table, the method further includes:

[0010] Determine the external defective positions of the defective pixel columns according to the pixel compensation data of the entire column anomaly;

[0011] Repair the external defective positions of the defective pixel columns.

[0012] Optionally, repairing the external defective positions of the defective pixel columns includes:

[0013] Disconnect the connector and the display panel corresponding to the external defective position of the defective pixel column and connected through the pad terminals;

[0014] Connect a new driving chip to the display panel and the printed circuit board by using a new connector.

[0015] Optionally, before connecting the new driving chip to the display panel and the printed circuit board by using a new connector, it further includes:

[0016] Clean the pad terminals corresponding to the external defective positions of the defective pixel columns.

[0017] Optionally, after connecting the new driving chip to the display panel and the printed circuit board by using a new connector, it further includes:

[0018] Perform an image inspection on the display panel.

[0019] Optionally, it further includes:

[0020] After confirming that there is no abnormal pixel compensation data for the first number of pixel columns in the pixel data compensation table, determine that the pixel defect cause in the display panel has nothing to do with external defects.

[0021] Optionally, after obtaining the pixel data compensation table generated by the display panel during the test phase, and before determining that the cause of the pixel defect in the display panel is external defect after confirming that there is abnormal pixel compensation data for the first number of pixel columns in the pixel data compensation table, it further includes:

[0022] Based on the pixel data compensation table, detect the abnormal conditions of the compensation data of at least three pixels belonging to the same pixel column and located in three different regions in the column direction of the display panel;

[0023] When the compensation data of at least three pixels belonging to the same pixel column and located in three different regions in the column direction are simultaneously abnormal, determine that there is abnormal pixel compensation data for the entire column in the pixel data compensation table.

[0024] In a second aspect, an embodiment of the present invention further provides a repair system for a display panel, including:

[0025] A defect determination module, configured to determine that there are pixel defects in a display panel after the installation of a driving chip is completed, where the pixel defects include at least one column of defective pixels. Among them, the display panel uses a tape automated bonding process to connect the driving chip, the display panel, and a printed circuit board through a connector;

[0026] A data compensation table acquisition module, configured to acquire a pixel data compensation table generated by the display panel during a test phase;

[0027] A defect cause determination module, configured to, after confirming that there is abnormal pixel compensation data for a first number of pixel columns in the pixel data compensation table, determine the cause of the pixel defects in the display panel as an external defect; where the external defect includes a defective tape automated bonding connection and a defective driving chip, and the first number is the number of pixel columns driven by the driving chip.

[0028] Optionally, it further includes:

[0029] A defect location determination module, configured to determine the external defect location of the defective pixel column according to the pixel compensation data of the entire column that is abnormal;

[0030] A repair module, configured to repair the external defect location of the defective pixel column.

[0031] In a third aspect, an embodiment of the present invention further provides a display device, including: a display panel and a driving chip; the driving chip is electrically connected to the display panel through a connector; the display panel is repaired by using the display panel repair method according to any one of the first aspects above.

[0032] The technical solution of the embodiment of the present invention first determines that there are pixel defects in a display panel after the installation of a driving chip is completed, where the pixel defects include at least one column of defective pixels. Among them, the display panel uses a tape automated bonding process to connect the driving chip, the display panel, and a printed circuit board through a connector; then acquires a pixel data compensation table generated by the display panel during a test phase; and finally, after confirming that there is abnormal pixel compensation data for a first number of pixel columns in the pixel data compensation table, determines the cause of the pixel defects in the display panel as an external defect; where the external defect includes a defective tape automated bonding connection and a defective driving chip, and the first number is the number of pixel columns driven by the driving chip. The embodiment of the present invention can solve the problem of too high a rejection rate caused by directly discarding a display panel with defective pixels in an entire column, and can detect that the defective pixels in an entire column of the display panel are caused by external defects such as a tape automated bonding process or a driving chip, which helps to repair the display panel when there are defects in the display panel array, reduce the rejection rate of the panel, and improve the yield of the product. Description of the Drawings

[0033] Figure 1 is a flowchart of a display panel repair method provided by an embodiment of the present invention;

[0034] Figure 2 is a schematic structural diagram of a display panel provided by an embodiment of the present invention;

[0035] Figure 3 is Figure 2 a compensation data curve graph of each pixel in the same pixel row of the shown display panel;

[0036] Figure 4 is a flowchart of another display panel repair method provided by an embodiment of the present invention;

[0037] Figure 5 is a flowchart of yet another display panel repair method provided by an embodiment of the present invention;

[0038] Figure 6 is a schematic structural diagram of a display panel repair system provided by an embodiment of the present invention;

[0039] Wherein, 10 - display panel, 20 - driving chip, 30 - connector, 11 - pad terminal, 101 - pixel column, 100 - defect determination module, 200 - data compensation table acquisition module, 300 - defect cause determination module, 400 - defect position determination module, 500 - repair module. Detailed Embodiment

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the sake of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all the structures.

[0041] Figure 1 is a flowchart of a display panel repair method provided by an embodiment of the present invention. Referring to Figure 1 , the display panel repair method includes:

[0042] S110. Determine that there are pixel defects in the display panel after the installation of the driving chip is completed. The pixel defects include at least one column of defective pixels. Among them, the display panel uses a tape automated bonding process to connect the driving chip, the display panel, and the printed circuit board through a connector.

[0043] In the embodiments of the present invention, the repair of the display panel mainly targets the display panel with array pixel defects. Therefore, before repair, it is necessary to determine the pixel defect type of the display panel. During the manufacturing process of the display panel, a series of test processes will be carried out after preparation. The test processes may include the test of the driving circuit, the line test of the data line and the gate line formed on the array substrate, the test executed after the pixel electrode is formed, the electrical test and the lighting test executed after the substrate bonding and the liquid crystal dropping process, etc. Various defects of the panel can be detected in the test process, including the defect that the entire column of pixels cannot be lit or the brightness is significantly abnormal compared with other pixels. This step is essentially a process of defect detection of the display panel using the test process. Of course, here it only targets a specific type of display panel with entire column pixel defects, and does not include a display panel with one or several individual pixels having defects.

[0044] Figure 2 is a schematic structural diagram of a display panel provided by an embodiment of the present invention. As Figure 2 shown, this display panel has pixel defects, and at least one column of pixels has defects. Exemplarily, as Figure 2 shown, the display panel includes 15,360 pixel columns 101, and among them, 960 adjacent pixel columns 101 are determined to have defects through the test process. It should be noted that the concept of pixel defects here refers to the abnormal state where the pixel cannot be lit or its lit brightness is significantly different from other pixels.

[0045] Continuing to refer to Figure 2 , those skilled in the art can understand that in the existing display panel, the tape automated bonding (TAB) process is used to connect the driving chip 20, the display panel 10, and the printed circuit board (not shown in the figure) through the connector 30. The connector 30 specifically refers to a tape carrier package (TCP). Of course, in this embodiment, the connector 30 can also be a connector formed by other packaging forms and packaging materials, and this embodiment does not make special limitations on this. By Figure 2It can be seen that the connector 30 and the display panel 10 are connected through the pad terminals 11. When there are pixel defects in the display panel 10, it may be because there is a misalignment between the connector 30 and the display panel 10, resulting in the test signal of the test device not being able to enter the display panel 10 through the connector 30. Or, foreign objects remaining in the manufacturing process cause a disconnection between the connector 30 and the display panel 10. Or, the driving chip 20 itself fails and cannot output signals normally. It can be understood that since the driving chip 20 is responsible for providing data signals to the display panel 10, when there is a poor connection as described above, it will cause the pixel columns 101 driven by the driving chip 20 in the display panel 10 to have poor display, that is, it is manifested as a certain number of entire columns of pixels having defects. As Figure 2 shown in the display panel, each driving chip 20 actually drives 960 pixel columns 101. When the driving chip 20 has a poor connection in the TAB process, all 960 pixel columns 101 in the display panel will be abnormal.

[0046] S120. Obtain the pixel data compensation table generated during the test stage of the display panel.

[0047] Those skilled in the art know that there must be differences in the lighting conditions of each pixel in the display panel. In order to compensate for the differences in pixel brightness, during the normal production of the display panel, the pixel brightness conditions will be detected and determined, and data compensation will be designed according to the pixel brightness design to ensure the brightness balance of each pixel. Here, the compensation for pixel brightness is generally to provide different data signals for pixels, that is, to provide different data signals for pixels with different brightnesses. Therefore, a pixel data compensation table will be generated during this test stage to guide the data driving process during the actual display. This step is to obtain this data compensation table based on the existing data compensation table generation process for verifying pixel defects and judging the reasons.

[0048] S130. After confirming that there are abnormal pixel compensation data for the first number of pixel columns in the pixel data compensation table, determine the reason for the pixel defect in the display panel as external defects; where the external defects include tape automated bonding connection defects and driving chip defects, and the first number is the number of pixel columns driven by the driving chip.

[0049] It can be understood that if there are abnormal pixel compensation data in an entire column in the pixel data compensation table, it indicates that there are pixel defects in an entire column in the display panel. That is, the defect situation of the pixels in an entire column in the display panel will be reflected in the pixel compensation data table. Further, according to the number of pixel columns with abnormal pixel compensation data in the pixel compensation data, the actual defective pixel columns in the display panel can be determined. As mentioned above, when the connection between the connector 30 and the display panel 10 is poor in the TAB process, a specific number of pixel columns 101 in the display panel 10 will be abnormal. Based on this, when it is determined that the number of pixel columns 101 with abnormal pixel compensation data in the pixel data compensation table is equal to the number of pixel columns 101 driven by the driving chip 20, it indicates that the driving chip 20 cannot work properly, and thus it can be determined that it is the driving chip 20 itself or the connection between the driving chip 20 and the display panel 10 that is poor.

[0050] Figure 3 Yes Figure 2 The compensation data curve graphs of the pixels in the same pixel row in the shown display panel, refer to Figure 2 and Figure 3 , based on the compensation data curves of the pixels in this pixel row, it can be determined that a certain number of pixel columns in the middle area have display abnormalities, and according to the positions of the specific abnormal pixels, the number of pixel columns can be determined to be 960. From this, it can be inferred that there are 960 pixel columns in the display panel with poor display. Further, the driving chips corresponding to the connection of these 960 pixel columns cannot work properly, so it can be determined that it is an external defect.

[0051] The technical solution of the embodiment of the present invention is as follows: First, it is determined that there are pixel defects in the display panel after the installation of the driving chip. The pixel defects include at least one column of defective pixels. Among them, the display panel uses the tape automated bonding process to connect the driving chip, the display panel, and the printed circuit board through a connector; then the pixel data compensation table generated during the test phase of the display panel is obtained; finally, after confirming that there is an abnormal pixel compensation data for the first number of pixel columns in the pixel data compensation table, the cause of the pixel defects in the display panel is determined to be an external defect; where the external defect includes poor tape automated bonding connection and defective driving chip, and the first number is the number of pixel columns driven by the driving chip. The embodiment of the present invention can solve the problem of too high rejection rate caused by directly discarding the display panel with defective pixels in an entire column, and can detect that the defective pixels in an entire column in the display panel are caused by external defects such as the TAB process or the driving chip, which helps to repair the display panel when the array of the display panel is defective, reduce the rejection rate of the panel, and improve the yield of the product.

[0052] Continue to refer to Figure 1 , after step S130, the following steps can be added to this repair method:

[0053] S140. Determine the external defect location of the defective pixel column according to the pixel compensation data of the entire column anomaly.

[0054] This step is to determine the column where the abnormal pixels are located, that is, the defective pixel column, by using the abnormal compensation data in the pixel data compensation table to replace the abnormal pixels in the display panel. Subsequently, based on the column where the abnormal pixels are located, a further process is carried out to determine whether there is a TAB defect corresponding to the abnormal pixel column or whether the driving chip 20 connected through the TAB is faulty. Here, the external defect refers to the poor connection in the TAB process and the poor bonding of the driving chip 20 in the TAB process.

[0055] S150. Repair the external defect location of the defective pixel column.

[0056] This step can solve the pixel column defect by repairing the TAB position and the driving chip that cause the pixel column defect, enabling each pixel in the pixel column to be normally lit, so that normal shipment can be achieved.

[0057] Specifically, the above step S150 can be refined as follows:

[0058] S151. Disconnect the connector corresponding to the external defect location of the defective pixel column and connected through the pad terminal from the display panel.

[0059] S152. Use a new connector to connect the new driving chip to the display panel and the printed circuit board.

[0060] The above steps are the process of replacing the new TAB, including the process of separating the original TAB and reconnecting the new TAB. It can be understood that since the driving chip 20 needs to be bonded to the solder joints on the carrier tape during the TAB connection process, and the driving chip 20 and the solder joints need to be encapsulated, generally epoxy resin and silicone rubber are used for encapsulation protection. Therefore, when there is a poor connection or the driving chip 20 is faulty, during the separation process, not only the TAB needs to be separated from the display panel 10 and the printed circuit board, but also the resin needs to be peeled off.

[0061] The embodiment of the present invention provides a more specific display panel repair method for the specific repair process. Among them, before the above step S152, the following step can also be set: Clean the pad terminal 11 corresponding to the external defect location of the defective pixel column.

[0062] And, after the above step S52, the following step can also be set: Perform an image inspection on the display panel.

[0063] Specifically, Figure 4 is the flowchart of another display panel repair method provided by the embodiment of the present invention. Refer to Figure 4, the repair method includes:

[0064] S210. Determine that there are pixel defects in the display panel after the installation of the driving chip is completed. The pixel defects include at least one column of defective pixels. Among them, the display panel uses the tape automated bonding process to connect the driving chip, the display panel, and the printed circuit board through a connector.

[0065] S220. Obtain the pixel data compensation table generated by the display panel during the test phase.

[0066] S230. After confirming that there are abnormal pixel compensation data for the first number of pixel columns in the pixel data compensation table, determine that the cause of the pixel defects in the display panel is an external defect. Among them, the external defects include poor tape automated bonding connection and defective driving chip. The first number is the number of pixel columns driven by the driving chip.

[0067] S240. Determine the external defect position of the defective pixel column according to the pixel compensation data of the entire column being abnormal.

[0068] S250. Disconnect the connector connected through the pad terminal corresponding to the external defect position of the defective pixel column and the display panel.

[0069] S260. Clean the pad terminals corresponding to the external defect positions of the defective pixel columns.

[0070] S270. Use a new connector to connect the new driving chip to the display panel and the printed circuit board.

[0071] S280. Perform an image inspection on the display panel.

[0072] It should be noted that for the steps in this embodiment that are the same as those in the previous embodiment, they will not be elaborated here and can refer to the specific introduction in the previous embodiment.

[0073] Regarding step S260 in this embodiment, its main purpose is to ensure the cleanliness of the pad terminals 11 on the separated display panel 10, avoid the influence of various abnormal conductive adhesives and other impurities left during the previous connection process on the connection effect when reconnecting the new TAB, and avoid causing pixel defects again.

[0074] And for step S280, it is actually a process of optical detection. This process can detect the working state of the display panel with the driving chip reconnected, and determine that each pixel of the repaired display panel lights up normally. Thus, after passing the optical detection and being determined to be normal, it can be shipped.

[0075] Furthermore, an embodiment of the present invention further provides a method for repairing a display panel. Additionally, the following steps may be added: After confirming that there is no pixel compensation data with a whole-column anomaly in the pixel data compensation table, determine that the cause of the pixel defect in the display panel has nothing to do with the tape automated bonding connection.

[0076] In addition, based on the above first embodiment, after step S120 and before step S130, the following steps may be added:

[0077] Based on the pixel data compensation table, detect the anomaly conditions of the compensation data of at least three pixels that belong to the same pixel column and are respectively located in three different regions in the column direction of the display panel;

[0078] When the compensation data of at least three pixels that belong to the same pixel column and are respectively located in three different regions in the column direction are simultaneously anomalous, determine that there is pixel compensation data with a whole-column anomaly in the pixel data compensation table.

[0079] Specifically, Figure 5 is a flowchart of another method for repairing a display panel provided by an embodiment of the present invention. Referring to Figure 5 , the method for repairing the display panel may include:

[0080] S310. Determine that there are pixel defects in the display panel after the installation of the driving chip is completed. The pixel defects include at least one column of pixels being defective. Among them, the display panel uses the tape automated bonding process to connect the driving chip, the display panel, and the printed circuit board through a connector.

[0081] S320. Obtain the pixel data compensation table generated by the display panel during the test phase.

[0082] S330. Based on the pixel data compensation table, detect the anomaly conditions of the compensation data of at least three pixels that belong to the same pixel column and are respectively located in three different regions in the column direction of the display panel.

[0083] S340. When the compensation data of at least three pixels that belong to the same pixel column and are respectively located in three different regions in the column direction are simultaneously anomalous, determine that there is pixel compensation data with a whole-column anomaly in the pixel data compensation table.

[0084] S350. After confirming that there is pixel compensation data anomaly in the first number of pixel columns in the pixel data compensation table, determine that the cause of the pixel defect in the display panel is an external defect; among them, the external defect includes tape automated bonding connection defect and driving chip defect, and the first number is the number of pixel columns driven by the driving chip.

[0085] S360. According to the pixel compensation data with a whole-column anomaly, determine the external defect position of the defective pixel column.

[0086] S370. Repair the external defective position of the defective pixel column.

[0087] S380. After confirming that there is no abnormal pixel compensation data for the first number of pixel columns in the pixel data compensation table, determine that the cause of the pixel defect in the display panel has nothing to do with external defects.

[0088] Similarly, the same steps as in the previous embodiments in this embodiment will not be elaborated here, and the relevant introduction in the previous embodiments can be continued to be referred to.

[0089] Regarding steps S330 and S340, it provides a method for determining the abnormality of the pixel compensation data of the entire column. Specifically, continue to refer to Figure 2 , the three different regions in the column direction can specifically be the upper, middle, and lower regions formed by equally dividing the display panel 10 in the column direction. And, randomly find a pixel row in each of the upper, middle, and lower partitions, and compare the pixel compensation data of the same pixel column in these three pixel rows with the compensation data of other pixels in turn, and it can be known whether there are three defective pixels in the same pixel column among these three pixel rows. When there are three pixels in the same pixel column among these three pixel rows and the compensation data is abnormal, then these three pixels can represent the entire pixel column, and it is considered that the pixel column where these three pixels are located is defective.

[0090] Using this method to judge the abnormality of the pixel compensation data of the entire column can reduce the number of compensation data judgments, reduce the complexity of comparing compensation data, improve the judgment efficiency of pixel column abnormalities, speed up the determination efficiency of external faults, and help improve the repair efficiency of the display panel.

[0091] For the above step S380, it can be understood that the obvious basis for the existence of the entire column of pixel defects caused by the defective driving chip or the defective TAB connection is that the number of pixel columns with the entire column of pixel defects is equal to the number of pixel columns driven by the driving chip. Although there are abnormal pixel columns in the entire column in the display panel, when the number does not meet the above conditions, it means that the abnormality of this pixel column is not caused by the defective TAB, and it is more likely to be caused by a short circuit or open circuit of the data signal line in the display panel. Thus, it can be judged that it belongs to the internal defect of the display panel, and the defective point cannot be located and precisely repaired. Therefore, in this case, the display panel can be selected to be discarded. Additionally, it should be noted that step S380 is actually an alternative solution to step S350, and it is two results of the cause judgment of the abnormal pixel compensation data of the entire column.

[0092] Based on the same inventive concept, the embodiment of the present invention also provides a repair system for a display panel. Figure 6 It is a schematic structural diagram of a repair system for a display panel provided by the embodiment of the present invention. Refer to Figure 6, the repair system can execute the display panel repair method provided by any embodiment of the present invention, specifically including:

[0093] A defect determination module 100, configured to determine that there are pixel defects in a display panel after the installation of a driving chip is completed. The pixel defects include at least one column of defective pixels. Among them, the display panel uses a tape automated bonding process to connect the driving chip, the display panel, and a printed circuit board through a connector;

[0094] A data compensation table acquisition module 200, configured to acquire a pixel data compensation table generated by the display panel during the test phase;

[0095] A defect cause determination module 300, configured to, after confirming that there are abnormal pixel compensation data for the first number of pixel columns in the pixel data compensation table, determine that the cause of the pixel defects in the display panel is poor tape automated bonding connection; wherein, the first number is the number of pixel columns driven by the driving chip.

[0096] Further, the repair system may further include:

[0097] A defect position determination module 400, configured to determine an external defective position of the defective pixel column according to the pixel compensation data of the entire abnormal column;

[0098] A repair module 500, which repairs the external defective position of the defective pixel column.

[0099] Among them, the repair module 500 is specifically configured to disconnect the connector and the display panel corresponding to the external defective position of the defective pixel column and connected through a pad terminal; use a new connector to connect a new driving chip to the display panel and the printed circuit board.

[0100] In addition, the repair module 500 is further configured to clean the pad terminals corresponding to the external defective positions of the defective pixel columns before using a new connector to connect a new driving chip to the display panel and the printed circuit board; and, after using a new connector to connect a new driving chip to the display panel and the printed circuit board, perform a portrait inspection on the display panel.

[0101] The above-mentioned defect cause determination module 300 is further configured to determine that the cause of the pixel defects in the display panel has nothing to do with external defects after confirming that there are no abnormal pixel compensation data for the first number of pixel columns in the pixel data compensation table.

[0102] The repair system may further include a pixel data abnormality detection module, which is configured to detect the abnormality of the compensation data of at least three pixels belonging to the same pixel column and located in three different regions in the column direction of the display panel based on the pixel data compensation table; when the compensation data of at least three pixels belonging to the same pixel column and located in three different regions in the column direction are abnormal at the same time, it is determined that there is a column-wide abnormal pixel compensation data in the pixel data compensation table.

[0103] In addition, the present invention also provides a display device. Refer to Figure 2 , the display device includes: a display panel 10 and a driving chip 20; the driving chip 20 is electrically connected to the display panel 10 through a connector 30; the display panel 10 is repaired by using the display panel repair method provided in any embodiment of the present invention, and since the display device includes the display panel, it has the same or similar beneficial effects as those of the display panel repair method.

[0104] Note that the above are only the preferred embodiments of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here, and various obvious changes, re-adjustments, combinations with each other and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments only. Without departing from the concept of the present invention, it may further include more other equivalent embodiments, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel repair method, characterized in that, Including: Determine that there are pixel defects in the display panel after the installation of the driving chip is completed. The pixel defects include at least one column of defective pixels. Among them, the display panel uses a tape automated bonding process to connect the driving chip, the display panel, and the printed circuit board through a connector; Obtain the pixel data compensation table generated by the display panel during the test phase; After confirming that there are abnormal pixel compensation data for the first number of pixel columns in the pixel data compensation table, determine that the cause of the pixel defects in the display panel is external defect. Among them, the external defect includes tape automated bonding connection defect and driving chip defect, and the first number is the number of pixel columns driven by the driving chip; After obtaining the pixel data compensation table generated by the display panel during the test phase and before determining that the cause of the pixel defects in the display panel is external defect after confirming that there are abnormal pixel compensation data for the first number of pixel columns in the pixel data compensation table, it further includes: Based on the pixel data compensation table, detect the abnormal conditions of the compensation data of at least three pixels that belong to the same pixel column and are located in three different regions in the column direction of the display panel; When the compensation data of at least three pixels that belong to the same pixel column and are located in three different regions in the column direction are simultaneously abnormal, determine that there are pixel compensation data with abnormal entire columns in the pixel data compensation table.

2. The repair method according to claim 1, wherein After determining that the cause of the pixel defects in the display panel is external defect after confirming that there are abnormal pixel compensation data for the first number of pixel columns in the pixel data compensation table, it further includes: According to the pixel compensation data with abnormal entire columns, determine the external defect positions of the defective pixel columns; Repair the external defect positions of the defective pixel columns.

3. The repair method according to claim 2, wherein, Repairing the external defect positions of the defective pixel columns includes: Disconnect the connector and the display panel corresponding to the external defect position of the defective pixel column and connected through the pad terminal; Use a new connector to connect a new driving chip to the display panel and the printed circuit board.

4. The repair method according to claim 3, wherein Before using a new connector to connect a new driving chip to the display panel and the printed circuit board, it further includes: Clean the pad terminal corresponding to the external defect position of the defective pixel column.

5. The repair method according to claim 3, characterized in that After using a new connector to connect a new driving chip to the display panel and the printed circuit board, it further includes: Perform an image inspection on the display panel.

6. The repair method according to claim 1, characterized in that It further includes: After confirming that there are no abnormal pixel compensation data for the first number of pixel columns in the pixel data compensation table, determine that the cause of the pixel defects in the display panel has nothing to do with external defects.

7. A repair system for a display panel, characterized in that, Including: A defect determination module for determining that there are pixel defects in the display panel after the installation of the driving chip is completed. The pixel defects include at least one column of defective pixels. Among them, the display panel uses a tape automated bonding process to connect the driving chip, the display panel, and the printed circuit board through a connector; A data compensation table acquisition module for obtaining the pixel data compensation table generated by the display panel during the test phase; A pixel data anomaly detection module, configured to detect the anomaly condition of the compensation data of at least three pixels that belong to the same pixel column in the display panel and are respectively located in three different regions in the column direction based on the pixel data compensation table; when the compensation data of at least three pixels that belong to the same pixel column and are respectively located in three different regions in the column direction are abnormal simultaneously, determine that there is a pixel compensation data with a whole-column anomaly in the pixel data compensation table; A defect cause determination module, configured to determine that the cause of the pixel defect of the display panel is external defect after confirming that there is an anomaly in the pixel compensation data of the pixel columns with a first quantity in the pixel data compensation table; wherein, the external defect includes tape automated bonding connection defect and driving chip defect, and the first quantity is the quantity of pixel columns driven by the driving chip.

8. The repair system for a display panel according to claim 7, wherein, It further includes: A defect position determination module, configured to determine the external defect position of the pixel column with a defect according to the pixel compensation data with a whole-column anomaly; A repair module, which repairs the external defect position of the pixel column with a defect.

9. A display device, characterized in that, It includes: A display panel and a driving chip; the driving chip is electrically connected to the display panel through a connector; The display panel is repaired by using the display panel repair method according to any one of the above claims 1-6.

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