Display panel repair method, display panel and display

Abstract

The present application discloses a display panel repair method, a display panel, and a display. The display panel includes a repair line and a broken data line with a breakpoint. The broken data line is divided by the breakpoint into two non-conductive sub-data lines, a first sub-data line and a second sub-data line. The repair line and the first sub-data line are connected to a data drive unit. After short-circuiting the second sub-data line of the broken data line with the repair line to obtain a display panel after the broken data line is repaired, the present application selects multiple selected grayscales from all grayscales corresponding to the repair area of ​​the display panel after the broken data line is repaired, obtains grayscale compensation values ​​for the multiple selected grayscales, and then obtains grayscale compensation values ​​for the unselected grayscales corresponding to the repair area based on the grayscale compensation values ​​of the multiple selected grayscales. Grayscale compensation is performed on the repair area so that the brightness of the repair area of ​​the display panel can reach the target brightness, thereby improving the image display effect of the display panel after the broken data line is repaired, and achieving high repair efficiency.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel repair method, a display panel, and a display. Background Art

[0002] During the production process of display panels, due to process reasons, there will be some defective products with breakpoints in the data lines. These defective products can only be scrapped because obvious vertical dark lines can be seen after lighting up, which causes cost waste to a certain extent.

[0003] To improve these defective products, related technologies employ a repair line on the display panel. This line short-circuits the section of the broken data line away from the data driver unit, then connects the section away from the data driver unit to the data driver unit via the repair line, repairing the broken data line. However, the brightness of the repaired area is lower than that of the surrounding unrepaired area, resulting in poor display quality on the display panel after repair. Summary of the Invention

[0004] In order to solve the problem of poor display effect of a display panel after a broken data line is repaired, the present application provides a display panel repair method, a display panel, and a display.

[0005] According to one aspect of an embodiment of the present application, a display panel repair method is disclosed. The display panel includes a repair line and a broken data line with a breakpoint. The broken data line is divided into two non-conductive sub-data lines, a first sub-data line and a second sub-data line, by the breakpoint. The repair line and the first sub-data line are connected to a data driver unit. The display panel repair method includes:

[0006] Short-circuiting the second sub-data line of the broken data line and the repair line to obtain a display panel after the broken data line is repaired;

[0007] selecting a plurality of selected grayscales from all grayscales corresponding to a repair area of ​​the display panel after the broken data line is repaired, the repair area being an area where sub-pixels corresponding to the second sub-data line are located;

[0008] Obtaining grayscale compensation values ​​of the plurality of selected grayscales, wherein the grayscale compensation values ​​are used to make the brightness of the repaired area consistent with the brightness of the non-repaired area of ​​the display panel;

[0009] Based on the grayscale compensation values ​​of the multiple selected grayscales, grayscale compensation values ​​of unselected grayscales corresponding to the repair area are obtained.

[0010] In an exemplary embodiment, at least two of the multiple selected grayscales are non-adjacent grayscales, and obtaining the grayscale compensation value of the unselected grayscale corresponding to the repair area based on the grayscale compensation values ​​of the multiple selected grayscales includes:

[0011] Obtaining a grayscale compensation value of a selected grayscale greater than a target grayscale and a grayscale compensation value of a selected grayscale less than the target grayscale among the multiple selected grayscales, wherein the target grayscale is any grayscale among the unselected grayscales corresponding to the repair area;

[0012] Based on the grayscale compensation value of the selected grayscale greater than the target grayscale and the grayscale compensation value of the selected grayscale less than the target grayscale, a linear difference calculation is performed to obtain the grayscale compensation value of the target grayscale.

[0013] In an exemplary embodiment, performing a linear difference calculation based on the grayscale compensation value of the selected grayscale greater than the target grayscale and the grayscale compensation value of the selected grayscale less than the target grayscale to obtain the grayscale compensation value of the target grayscale includes:

[0014] Obtaining a first grayscale difference between the target grayscale and the selected grayscale smaller than the target grayscale, a second grayscale difference between the selected grayscale greater than the target grayscale and the selected grayscale smaller than the target grayscale, and a compensation value difference between the grayscale compensation value of the selected grayscale greater than the target grayscale and the grayscale compensation value of the selected grayscale smaller than the target grayscale;

[0015] performing a product operation on the first grayscale difference and the compensation value difference, and performing a division operation on the product operation result and the second grayscale difference to obtain a compensation adjustment value;

[0016] A grayscale compensation value of the target grayscale is obtained based on the compensation adjustment value and the grayscale compensation value of the selected grayscale that is smaller than the target grayscale.

[0017] In an exemplary embodiment, obtaining the grayscale compensation values ​​of the plurality of selected grayscales includes:

[0018] lighting up the display panel after the broken data line is repaired under different grayscale compensation values ​​set for the selected grayscale;

[0019] The grayscale compensation value corresponding to the closest brightness between the repaired area and the non-repaired area of ​​the display panel after the broken data line is repaired is used as the grayscale compensation value of the selected grayscale.

[0020] In an exemplary embodiment, under the selected grayscale setting with different grayscale compensation values, before lighting up the display panel after the broken data line is repaired, the display panel repair method further includes:

[0021] comparing a grayscale corresponding to the repair area with a grayscale threshold, wherein the grayscale threshold is smaller than a maximum grayscale of the display panel;

[0022] If the grayscale corresponding to the repaired area is greater than the grayscale threshold, the grayscale corresponding to the repaired area and the grayscale of the non-repaired area surrounding the repaired area are lowered by a preset value, and then the display panel after the broken data line is repaired is illuminated under a different grayscale compensation value set for the selected grayscale;

[0023] If the grayscale corresponding to the repaired area is less than the grayscale threshold, the step of lighting up the display panel after the broken data line is repaired under a grayscale compensation value different from the selected grayscale setting is directly performed.

[0024] In an exemplary embodiment, the repair line is overlapped with the broken data line, wherein the short-circuiting the second sub-data line of the broken data line and the repair line includes:

[0025] Laser is used to irradiate the overlapping position of the repair line and the second sub-data line of the broken data line to short-circuit the second sub-data line and the repair line.

[0026] In an exemplary embodiment, the data driving unit includes a first output channel and a second output channel, the first sub-data line is connected to the first output channel, the repair line is connected to the second output channel, and the second output channel is an output channel of the data driving unit that is not connected to any data line; before performing the step of selecting a plurality of selected grayscales from all grayscales corresponding to the repair area of ​​the display panel after the broken data line is repaired, the display panel repair method further includes:

[0027] The position information of the broken data line is recorded, and based on a mapping relationship between the position information and grayscale data, the signal outputted by the data driving unit to the second output channel is configured.

[0028] In an exemplary embodiment, the repair line includes a first sub-repair line and a second sub-repair line, the first sub-repair line extends along a first direction and is connected to the second output channel, the second sub-repair line extends along a second direction perpendicular to the first direction and overlaps with the broken data line; short-circuiting the second sub-data line of the broken data line with the repair line includes:

[0029] The second sub-data line of the broken data line is short-circuited with the second sub-repair line.

[0030] According to one aspect of an embodiment of the present application, a display panel is disclosed, comprising a repair line and a broken data line having a breakpoint, wherein the broken data line is divided by the breakpoint into two non-conductive first sub-data line and a second sub-data line, the repair line and the first sub-data line are connected to a data driving unit, and the display panel is repaired using the display panel repair method described above.

[0031] According to one aspect of an embodiment of the present application, a display is disclosed, comprising a display panel and a backlight module, wherein the display panel is as described above; the backlight module is arranged opposite to the display panel and is used to provide backlight for the display panel.

[0032] The technical solutions provided by the embodiments of the present application include at least the following beneficial effects:

[0033] The display panel repair method disclosed in the present application is used to repair a display panel. The display panel includes a repair line and a broken data line with a breakpoint. The broken data line is divided into two non-conductive first sub-data line and second sub-data line by the breakpoint. The repair line and the first sub-data line are connected to a data driving unit. The display panel repair method provided by the present application short-circuits the second sub-data line of the broken data line with the repair line to obtain a display panel after the broken data line is repaired. A plurality of selected grayscales are selected from all grayscales corresponding to the repair area of ​​the display panel after the broken data line is repaired, and grayscale compensation values ​​of the plurality of selected grayscales are obtained. The grayscale compensation values ​​are used to make the brightness of the repair area of ​​the display panel consistent with the brightness of the non-repair area of ​​the display panel. Then, based on the grayscale compensation values ​​of the plurality of selected grayscales, grayscale compensation values ​​of the unselected grayscales corresponding to the repair area are obtained. Through the scheme of the present application, grayscale compensation can be performed on the repair area so that the brightness of the repair area of ​​the display panel can reach the target brightness, thereby improving the image display effect of the display panel after the broken data line is repaired, and achieving a better repair effect of the broken data line of the display panel. At the same time, the grayscale compensation values ​​of multiple selected grayscales corresponding to the repair area are first obtained, and then based on the grayscale compensation values ​​of multiple selected grayscales, the grayscale compensation values ​​of unselected grayscales corresponding to the repair area are obtained, which reduces the number of debugging times and improves the repair efficiency of the display panel.

[0034] It should be understood that the foregoing general description and the following detailed description are merely illustrative and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0036] Figure 1 The figure schematically shows the composition of a display provided in one embodiment of the present application.

[0037] Figure 2 A partial schematic diagram of a display provided in an embodiment of the present application is schematically shown.

[0038] Figure 3 A flow chart of a display panel repair method provided in one embodiment of the present application is schematically shown.

[0039] Figure 4 A specific implementation scenario of obtaining grayscale compensation values ​​according to an embodiment of the present application is schematically illustrated.

[0040] Figure 5 corresponds to Figure 3 Detailed flowchart of step S330 is shown.

[0041] Figure 6 A specific implementation scenario of obtaining grayscale compensation values ​​according to an embodiment of the present application is schematically illustrated.

[0042] Figure 7 The figure schematically shows the relationship between the grayscale compensation value and the grayscale according to an embodiment of the present application.

[0043] Figure 8 A partial schematic diagram of a display provided in another embodiment of the present application is schematically shown.

[0044] The following are the descriptions of the reference numerals:

[0045] 101. Pixel electrode; 102. Scan line; 103. Data line; 1031. First sub-data line; 1032. Second sub-data line; 104. Switching transistor; 105a / 105b. Repair line; 1051. First sub-repair line; 1052. Second sub-repair line; 106. Timing controller; 107. Gate drive unit; 108. Data drive unit; 109. First circuit board; 110. Second circuit board; 111. Memory; 112. Repair area; 113a. First display area; 113b. Second display area; P1 / P2 / P3 / P4. Short-circuit position; 200. Backlight module. DETAILED DESCRIPTION

[0046] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that the description of this application will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art.

[0047] In the description of the present application, unless otherwise specified, “plurality” means two or more.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more features.

[0049] In the related art, a repair line is provided on the display panel, and a section of the broken data line away from the data driving unit (hereinafter referred to as the second sub-data line) is connected to the data driving unit by the repair line to achieve the repair of the broken data line. Since a plurality of signal lines are arranged on the display panel, such as a plurality of scan lines and a plurality of data lines, the repair line will form a coupling capacitor with the signal line on the display panel, resulting in the capacitance of the second sub-data line being larger than the capacitance of the non-repaired data line. Moreover, the overlapping length of the repair line and the second sub-data line will be larger than the length of the non-repaired data line, resulting in the resistance of the second sub-data line after the short circuit with the repair line being larger than that of the non-repaired data line. Therefore, the charging rate of the pixel electrode in the repair area of ​​the broken data line is lower than the charging rate of the pixel electrode in the non-repair area, and the picture display effect of the display panel after the repair is poor. To this end, the present application provides a display panel repair method suitable for a display panel with a broken data line to solve the problem of poor picture display effect of the display panel after the broken data line is repaired.

[0050] Figure 1 The figure schematically shows the composition of a display provided in one embodiment of the present application. Figure 2 A partial schematic diagram of a display provided in an embodiment of the present application is schematically shown.

[0051] like Figure 1 As shown, the display includes a display panel 100 and a backlight module 200 , and the backlight module 200 is arranged opposite to the display panel 100 .

[0052] The backlight module 200 is used to provide backlight for the display panel 100 .

[0053] like Figure 2 As shown, the display panel 100 includes multiple pixel electrodes 101, multiple scan lines 102, multiple data lines 103, a common line (not shown in the figure), multiple switching transistors 104, multiple repair lines 105a / 105b, a timing controller (TCON) 106, a gate driving unit 107 and a data driving unit 108.

[0054] The scan line 102 and the data line 103 are arranged on different layers of the display panel. The data line 103 extends along a first direction. Figure 2Taking the angle shown as an example, the first direction is the column direction. The plurality of data lines 103 include broken data lines with breakpoints and complete data lines without breakpoints, wherein the broken data lines are divided into two non-conductive first sub-data lines 1031 and second sub-data lines 1032 by the breakpoints. The scan line 102 extends along the second direction to Figure 2 Taking the angle shown as an example, the second direction is the row direction.

[0055] A pixel electrode 101 and a switching transistor 104 are provided in the area separated by each two adjacent scan lines 102 and two adjacent data lines 103. The area separated by each two adjacent scan lines 102 and two adjacent data lines 103 is a sub-pixel area. Multiple pixel electrodes 101 are arranged in a matrix. The switching transistor 104 is a thin film transistor. The gate of the switching transistor 104 is connected to the scan line 102, the source of the switching transistor 104 is connected to the data line 103, and the drain of the switching transistor 104 is connected to the corresponding pixel electrode 101. If a sufficient positive voltage is applied to a scan line 102, the switching transistor 104 on the scan line 102 will be turned on. At this time, the pixel electrode 101 on the scan line 102 will be connected to the data line 103, and the pixel voltage on the data line 103 will be transmitted to the corresponding pixel electrode 101.

[0056] The common line is used to output a common voltage Vcom. The liquid crystal molecules between the pixel electrode 101 and the common line rotate according to the voltage difference between the common voltage Vcom of the common line and the pixel voltage received by the pixel electrode 101, thereby controlling the transmittance of the liquid crystal molecules and thus achieving the effect of controlling the display brightness.

[0057] The gate driving unit 107 , the data driving unit 108 and the timing controller 106 constitute a driving module to provide corresponding control signals to the display panel, thereby controlling the display panel to display corresponding images.

[0058] The gate driving unit 107 is connected to multiple scan lines 102, and the timing controller 106 outputs a logic level signal to the gate driving unit 107. The gate driving unit 107 receives the logic level signal (digital quantity) output by the timing controller 106 and converts it into a gate driving signal (analog quantity) to selectively apply a positive voltage to a certain scan line 102, thereby turning on the switching transistor 104 on the scan line 102.

[0059] The data driver unit 107 is connected to the plurality of data lines 103. The timing controller 106 outputs data signals (grayscale data) to the data driver unit 108. The data driver unit 108 receives the data signals (digital quantity) output by the timing controller 106 and converts them into pixel drive signals (analog quantity). The pixel drive signals are then applied to the corresponding pixel electrodes 101 via the currently turned-on switching transistors 104, thereby controlling the rotation of the liquid crystal molecules and adjusting the display brightness. The data driver unit 108 is also connected to the repair lines 105a / 105b to output pixel drive signals to the repair lines 105a / 105b, thereby applying pixel voltages to the pixel electrodes 101 in the repaired area.

[0060] exist Figure 2 In the illustrated embodiment, the timing controller 106 is disposed on a first circuit board 109 , and the data driving unit 108 is disposed on a second circuit board 110 independent of the first circuit board 109 .

[0061] Figure 2 Only part of the structure of the display panel 100 is shown. It can be understood that the display panel 100 also includes other necessary components, such as liquid crystal arranged between the pixel electrode 101 and the common line, color filter and glass plate arranged in front of the pixel electrode 101, etc.

[0062] It is understandable that the display may further include other components besides the display panel 100 and the backlight module 200 .

[0063] Figure 3 The flowchart of the display panel repair method provided by an embodiment of the present application is schematically shown. The display panel repair method can be applied to the display panel provided by any embodiment of the present application, for example, Figure 2 The display panel shown in .

[0064] like Figure 3 As shown, the display panel repair method provided in the embodiment of the present application includes steps S310 to S340, which are specifically as follows:

[0065] In step S310 , the second sub-data line of the broken data line is short-circuited with the repair line to obtain a display panel after the broken data line is repaired.

[0066] The broken data line is divided into a non-conductive first sub-data line 1031 and a second sub-data line 1032 by the breakpoint. The first sub-data line 1031 is a section connected to the data driving unit 108 , and the second sub-data line 1032 is a section not connected to the data driving unit 108 .

[0067] By short-circuiting the second sub-data line 1032 and the repair line 105a / 105b, the second sub-data line 1032 is connected to the data driving unit 108 through the repair line 105a / 105b, so that the pixel electrode 101 connected to the second sub-data line 1032 through the switching transistor 104 can receive the pixel voltage output by the data driving unit 108, so that the sub-pixel corresponding to the second sub-data line 1032 can light up, preventing the display from having obvious vertical dark lines after it is lit.

[0068] Repair lines 105a / 105b overlap with broken data line 103. In one embodiment of the present application, in step S310, a laser is used to short-circuit the second sub-data line of the broken data line and the overlapping portion of the repair line. Laser short-circuiting the second sub-data line and the repair line is highly efficient and accurate.

[0069] In one example, the repair line 105a / 105b is disposed on an upper layer of the data line 103, and the melting point of the repair line 105a / 105b is lower than that of the data line 103. In step S310, a laser is focused on the intersection of the repair line and the second sub-data line, causing the intersection of the repair line and the second sub-data line to melt, thereby short-circuiting the second sub-data line and the repair line.

[0070] In one example, the repair lines 105a / 105b are disposed on top of the data lines 103, and a transparent conductive layer is disposed at the intersection of the repair lines 105a / 105b and the data lines 103. The melting point of the transparent conductive layer is lower than the melting points of the repair lines 105a / 105b and the data lines 103. In step S310, a laser is focused on the transparent conductive layer, causing it to melt at the intersection of the repair lines and the second sub-data line, thereby short-circuiting the second sub-data line and the repair line.

[0071] It should be noted that the overlapping arrangement of the repair line and the broken data line means that the repair line and the broken data line intersect and are stacked, and before executing step S310, the repair line and the broken data line are insulated.

[0072] Step S320 , selecting a plurality of selected gray levels from all gray levels corresponding to the repaired area of ​​the display panel after the broken data line is repaired.

[0073] The repair area is the area where the sub-pixel corresponding to the second sub-data line 1032 is located, for example Figure 2 The area 112 in the repair area 112. The area other than the sub-pixel corresponding to the second sub-data line 1032 is a non-repair area, that is, the display area on the display panel other than the repair area 112 is a non-repair area.

[0074] The grayscale corresponding to the repair area is related to the setting of the display panel. Taking a display panel with an 8-bit color depth as an example, all grayscales corresponding to the repair area can be 0 to 255 grayscales.

[0075] In step S320 , the multiple selected grayscales may be adjacent grayscales or non-adjacent grayscales. For example, at least two of the multiple selected grayscales are non-adjacent grayscales.

[0076] It should be noted that adjacent grayscales do not specifically refer to adjacent grayscales in an absolute sense, but rather to adjacent grayscales among the multiple grayscales corresponding to the repair area. For example, if the grayscales corresponding to the repair area are 108, 110, 114, and 118, then grayscale 108 and 110 are adjacent grayscales, grayscale 110 and 114 are adjacent grayscales, and grayscale 114 and 118 are adjacent grayscales. For another example, if the grayscales corresponding to the repair area are 108, 109, 110, and 113, then grayscale 108 and 109 are adjacent grayscales, grayscale 109 and 110 are adjacent grayscales, and grayscale 110 and 113 are adjacent grayscales.

[0077] Step S330 , obtaining grayscale compensation values ​​of a plurality of selected grayscales.

[0078] The grayscale compensation value is used to make the brightness of the repaired area consistent with the brightness of the non-repaired area of ​​the display panel.

[0079] It should be noted that the brightness of the repaired area is consistent with the brightness of the non-repaired area of ​​the display panel, which means that the brightness of the repaired area is slightly different from the brightness of the non-repaired area of ​​the display panel, and does not specifically mean that the brightness is the same in an absolute sense.

[0080] In one embodiment of the present application, step S330 includes: lighting up the display panel after the broken data line is repaired under different grayscale compensation values ​​set for the selected grayscale; and using the grayscale compensation value corresponding to the brightness of the repaired area and the non-repaired area of ​​the display panel after the broken data line is repaired as the grayscale compensation value of the selected grayscale.

[0081] By setting different grayscale compensation values ​​under the selected grayscale, the grayscale compensation value corresponding to the brightness of the repaired area and the non-repaired area is used as the grayscale compensation value of the selected grayscale. The grayscale compensation value of the selected grayscale is closer to the actual compensation value required, which can improve the picture display effect of the display panel after the broken data line is repaired.

[0082] Specifically, the display is set to monochrome. At this point, the target brightness of all pixels is set to be consistent, that is, the grayscale is consistent. Ideally, after lighting up the display panel after the broken data line is repaired, the brightness of the repaired area should be exactly the same as the brightness of the unrepaired area. In step S330, by setting different grayscale compensation values ​​for the selected grayscale, the grayscale compensation value corresponding to the closest brightness between the repaired area and the unrepaired area is debugged and obtained, and used as the grayscale compensation value for the selected grayscale. This allows the brightness of each area of ​​the repaired display panel to be as close to the target brightness as possible, resulting in a better display effect.

[0083] For example, the original grayscale of the repaired area is 112 grayscales. In step S330, after multiple debugging, it is found that when the grayscale of the repaired area is adjusted to 136 grayscales, the brightness of the repaired area is consistent with the brightness of the non-repaired area. The grayscale compensation value of 112 grayscales is determined to be 24 grayscales. For example, the original grayscale of the repaired area is 128 grayscales. In step S330, after multiple debugging, it is found that when the grayscale of the repaired area is adjusted to 160 grayscales, the brightness of the repaired area is consistent with the brightness of the non-repaired area. The grayscale compensation value of 128 grayscales is determined to be 32 grayscales. Figure 4 Before grayscale compensation, the repair area 112 and the surrounding non-repair area of ​​the repair area 112 are both 128 grayscales. Figure 4 As shown in (a), after grayscale compensation, the repair area 112 is adjusted to 160 grayscale, and the surrounding non-repair area of ​​the repair area 112 remains at 128 grayscale. Figure 4 As shown in (b).

[0084] Since the charging rate of the pixel electrodes in the repaired area is lower than that in the non-repaired area, it is generally necessary to increase the grayscale of the repaired area, that is, in step S330, the grayscale compensation value obtained is a value greater than zero. Also, since each display panel has an upper limit on the grayscale that can be displayed, for example, if the display panel has an 8-bit color depth, then the display panel can display a maximum of 255 grayscales. If the original grayscale of the repaired area is 255 grayscales or close to 255 grayscales, the original grayscale plus the grayscale compensation value will exceed 255 grayscales, and the display panel will not be able to display. Therefore, in one embodiment of the present application, a grayscale threshold is also set, and step S330 also includes a step of comparing the grayscale corresponding to the repaired area with the grayscale threshold and performing corresponding operation steps based on the comparison result to ensure that the display panel can normally display the compensated grayscale.

[0085] See Figure 5 As shown, step S330 includes steps S510 to S540, which are specifically as follows:

[0086] Step S510 , compare the grayscale corresponding to the repair area with the grayscale threshold. If the grayscale corresponding to the repair area is greater than the grayscale threshold, proceed to step S520 ; if the grayscale corresponding to the repair area is less than the grayscale threshold, proceed to step S530 .

[0087] The grayscale threshold is less than the maximum grayscale of the display panel, and the grayscale threshold can be flexibly set according to the actual situation of the display panel. For example, the maximum grayscale of the display panel is 255 grayscales, and the grayscale threshold is 240 grayscales.

[0088] In step S520, the grayscale corresponding to the repaired area and the grayscale of the surrounding non-repaired area of ​​the repaired area are lowered by a preset value. Then, the process proceeds to step S530.

[0089] The preset value may be a difference between the maximum grayscale of the display panel and the grayscale threshold. For example, the maximum grayscale of the display panel is 255 grayscales, the grayscale threshold is 240 grayscales, and the preset value is 15 grayscales.

[0090] It should be noted that the non-repaired area surrounding the repaired area can be an area on the display panel that belongs to the same color block as the repaired area, that is, an area corresponding to the same filter grid unit of the display's color filter. The color filter includes red, green, and blue filter grid units. Adjacent red, green, and blue filter grid units form a color unit. Three adjacent pixel electrodes control the light intensity of their corresponding sub-pixels. When light passes through the filter grid unit, the color unit displays the desired color.

[0091] Of course, in some embodiments, the non-repair area surrounding the repair area may also be extended to the non-repair area of ​​the entire display panel.

[0092] Step S530 , lighting up the display panel after the broken data line is repaired under the selected grayscale settings with different grayscale compensation values.

[0093] In step S540 , the grayscale compensation value corresponding to the closest brightness between the repaired area and the non-repaired area of ​​the display panel after the broken data line is repaired is used as the grayscale compensation value of the selected grayscale.

[0094] For example, Figure 6 As shown, the grayscale corresponding to the repaired area 112 and the original grayscale corresponding to the non-repaired area around the repaired area 112 are both 255 grayscales, as shown in FIG. Figure 6As shown in (a). The grayscale threshold is set to 240 grayscales. At this time, the comparison result of step S510 is that the grayscale corresponding to the repair area is greater than the grayscale threshold. In step S520, the grayscale corresponding to the repair area and the grayscale of the surrounding non-repaired area of ​​the repair area are adjusted down by 15 grayscales, that is, the grayscale corresponding to the repair area 112 and the grayscale of the surrounding non-repaired area of ​​the repair area 112 are adjusted to 240 grayscales, as shown in FIG. Figure 6 In step S530 and step S540, it is confirmed that the grayscale compensation value corresponding to grayscale 240 is 15 grayscale, that is, the grayscale corresponding to the repair area 112 is set to 255, and the grayscale of the non-repaired area around the repair area 112 is kept at grayscale 240, as shown in FIG. Figure 6 As shown in (c).

[0095] Step S340: Based on the grayscale compensation values ​​of the selected grayscales, grayscale compensation values ​​of the unselected grayscales corresponding to the repair area are obtained. In this way, each grayscale in the repair area has a corresponding grayscale compensation value.

[0096] In one embodiment of the present application, the grayscale compensation values ​​of the unselected grayscales are obtained by performing a linear difference calculation on the grayscale compensation values ​​of the selected grayscale.

[0097] Specifically, at least two of the multiple selected grayscales are non-adjacent grayscales. Step S340 includes: obtaining a grayscale compensation value of a selected grayscale greater than a target grayscale and a grayscale compensation value of a selected grayscale less than the target grayscale from the multiple selected grayscales, and then performing a linear difference calculation based on the grayscale compensation value of the selected grayscale greater than the target grayscale and the grayscale compensation value of the selected grayscale less than the target grayscale to obtain a grayscale compensation value of the target grayscale.

[0098] The target grayscale is any grayscale among the unselected grayscales corresponding to the repair area.

[0099] Exemplarily, the target grayscale is grayscale 128, and two selected grayscales adjacent to grayscale 128 among the multiple selected grayscales are grayscale 126 and grayscale 129. In step S340, a linear difference calculation is performed based on the grayscale compensation values ​​corresponding to grayscale 126 and grayscale 129 to obtain the grayscale compensation value for the target grayscale 128. Exemplarily, the target grayscale is grayscale 132, and two selected grayscales adjacent to grayscale 132 among the multiple selected grayscales are grayscale 131 and grayscale 133. In step S340, a linear difference calculation is performed based on the grayscale compensation values ​​corresponding to grayscale 131 and grayscale 133 to obtain the grayscale compensation value for the target grayscale 132.

[0100] More specifically, in step S340, a linear difference calculation is performed based on the grayscale compensation value of a selected grayscale greater than the target grayscale and the grayscale compensation value of a selected grayscale less than the target grayscale to obtain the grayscale compensation value of the target grayscale, including: obtaining a first grayscale difference between the target grayscale and a selected grayscale less than the target grayscale, a second grayscale difference between a selected grayscale greater than the target grayscale and a selected grayscale less than the target grayscale, and a compensation value difference between the grayscale compensation value of a selected grayscale greater than the target grayscale and the grayscale compensation value of a selected grayscale less than the target grayscale; performing a product operation on the first grayscale difference and the compensation value difference, and performing a division operation on the product operation result and the second grayscale difference to obtain a compensation adjustment value; and then, obtaining the grayscale compensation value of the target grayscale based on the compensation adjustment value and the grayscale compensation value of the selected grayscale less than the target grayscale.

[0101] Figure 7 The following diagram schematically illustrates the relationship between grayscale compensation values ​​and grayscales according to an embodiment of the present application. Lx represents the target grayscale, L1 represents a selected grayscale less than the target grayscale Lx, L2 represents a selected grayscale greater than the target grayscale Lx, and Cmpx represents the grayscale compensation value for the target grayscale Lx. Cmp1 represents the grayscale compensation value for the selected grayscale L1 less than the target grayscale Lx, and Cmp2 represents the grayscale compensation value for the selected grayscale L2 greater than the target grayscale Lx. In step S340, the grayscale compensation value Cmpx for the target grayscale Lx is obtained based on the following grayscale-to-grayscale compensation value relationship:

[0102]

[0103] Among them, (Lx-L1) represents a first grayscale difference between a target grayscale and a selected grayscale smaller than the target grayscale, (Cmp2-Cmp1) represents a compensation value difference between a grayscale compensation value of a selected grayscale greater than the target grayscale and a grayscale compensation value of a selected grayscale smaller than the target grayscale, and L2-L1 represents a second grayscale difference between a selected grayscale greater than the target grayscale and a selected grayscale smaller than the target grayscale.

[0104] For example, the target grayscale Lx is grayscale 128, the selected grayscale L1 smaller than the target grayscale is grayscale 126, and the selected grayscale L2 greater than the target grayscale is grayscale 130. In step S330, the grayscale compensation value Cmp1 for the selected grayscale L1 is grayscale 32, and the grayscale compensation value Cmp2 for the selected grayscale L2 is grayscale 34. Then, in step S340, the grayscale compensation value for the target grayscale Lx is calculated based on the relationship between grayscale and grayscale compensation value to obtain grayscale 33.

[0105] Since the pixel voltage applied to the pixel electrode by the data line is related to the grayscale, and the greater the pixel voltage applied to the pixel electrode, the brighter the display brightness, and the smaller the pixel voltage applied to the pixel electrode, the darker the display brightness, therefore, the closer the grayscale is, the closer the required grayscale compensation value is. This application uses a linear difference calculation based on the grayscale compensation value of a selected grayscale greater than the target grayscale and the grayscale compensation value of a selected grayscale less than the target grayscale to obtain the grayscale compensation value of the target grayscale, with high accuracy.

[0106] It should be noted that in other embodiments, the grayscale compensation value of the unselected grayscale may be obtained in other ways, for example, by averaging the grayscale compensation values ​​of adjacent selected grayscales and taking the average value as the grayscale compensation value of the unselected grayscale.

[0107] In summary, the display panel repair method disclosed in this application is used to repair a display panel. The display panel includes a repair line 105a / 105b and a broken data line with a breakpoint. The broken data line is divided by the breakpoint into two non-conductive sub-data lines, a first sub-data line 1031 and a second sub-data line 1032. The repair line 105a / 105b and the first sub-data line 1031 are connected to a data driver unit 108. The display panel repair method provided in this application short-circuits the second sub-data line of the broken data line with the repair line to obtain a display panel after the broken data line is repaired. Multiple selected grayscales are selected from all grayscales corresponding to the repaired area of ​​the display panel after the broken data line is repaired, and grayscale compensation values ​​for the multiple selected grayscales are obtained. The grayscale compensation values ​​are used to ensure that the brightness of the repaired area of ​​the display panel is consistent with the brightness of the non-repaired area of ​​the display panel. Grayscale compensation values ​​for the unselected grayscales corresponding to the repaired area are then obtained based on the grayscale compensation values ​​for the multiple selected grayscales. Through the solution of this application, grayscale compensation can be performed on the repair area, so that the brightness of the repair area of ​​the display panel can reach the target brightness, improving the image display effect of the display panel after the broken data line is repaired, and achieving better repair results for the broken data line of the display panel. At the same time, grayscale compensation values ​​for multiple selected grayscales corresponding to the repair area are first obtained, and then based on the grayscale compensation values ​​of the multiple selected grayscales, grayscale compensation values ​​for unselected grayscales corresponding to the repair area are obtained, reducing the number of debugging times and improving the repair efficiency of the display panel.

[0108] See you next Figure 2 The display panel is provided with multiple display areas, and the multiple display areas are spaced apart. The data line 103 of each display area is connected to a data driving unit 108, and at least one repair line 105a / 105b is provided on two opposite sides of each display area.

[0109] In step S310, the second sub-data line of the broken data line is short-circuited with the repair line, that is, the second sub-data line of the broken data line is short-circuited with the nearest repair line. Figure 2Taking the illustrated embodiment as an example, a display panel is provided with a first display area 113a and a second display area 113b. Repair lines 105a and 105b are provided on opposite sides of the first display area 113a, respectively. Repair lines 105a and 105b are also provided on opposite sides of the second display area 113b, respectively. That is, two repair lines are provided for each display area. In the first display area 113a, a broken data line has a breakpoint at position Q1. The second sub-data line 1032 of the broken data line is closer to the repair line 105a on the left. In step S310, the second sub-data line of the broken data line is short-circuited with the nearest repair line. Specifically, the second sub-data line 1032 of the broken data line is short-circuited with the repair line 105a on the left. The short-circuit position is marked as P1. In the second display area 113b, the broken data line has a breakpoint at position Q2, and the second sub-data line 1032 of the broken data line is closer to the repair line 105b on the right. In step S310, the second sub-data line of the broken data line is short-circuited with the nearest repair line, that is, the second sub-data line 1032 of the broken data line is short-circuited with the repair line 105b on the right, and the short-circuit position is marked as P2.

[0110] In one embodiment of the present application, the repair line 105a / 105b includes a first sub-repair line 1051 and a second sub-repair line 1052. The first sub-repair line 1051 extends along a first direction (column direction) and is connected to the data driver unit 108. The second sub-repair line 1052 extends along a second direction (row direction) perpendicular to the first direction. In other words, the second sub-repair line 1052 is perpendicular to the first sub-repair line 1051 and overlaps with the broken data line. In step S310, the second sub-repair line of the broken data line is short-circuited with the repair line, that is, the second sub-repair line of the broken data line is short-circuited with the second sub-repair line closest to it.

[0111] In this embodiment, the repair line 105a / 105b is configured to include a first sub-repair line 1051 extending along the column direction and a second sub-repair line 1052 extending along the row direction. The structure of the repair line 105a / 105b is simple and easy to manufacture, and the length of the repair link is short, which can reduce the capacitance and resistance of the repair area and improve the charging rate of the pixel electrode 101 in the repair area.

[0112] It should be noted that the term "vertical" does not specifically refer to vertical in an absolute mathematical sense, but can be approximately vertical. For example, due to manufacturing tolerances, the angle between the second sub-repair line 1052 and the first sub-repair line 1051 is greater than 90° or less than 90°.

[0113] Further, in Figure 2In the embodiment shown, two repair lines 105a / 105b are provided in the same display area, wherein the second sub-repair line 1052 of the repair line 105b is provided at the lower portion of the display area, and the second sub-repair line 1052 of the repair line 105a is provided at the upper portion of the display area, so as to facilitate the repair of broken data lines at different breakpoints. For example, when the breakpoint of the broken data line is at the upper portion, in step S310, the second sub-data line of the broken data line is short-circuited with the second sub-repair line at the upper portion, as shown in FIG. Figure 2 The second sub-data line of the broken data line is short-circuited with the second sub-repair line of the repair line 105a of the first display area 113a. When the breakpoint of the broken data line is at the lower position, in step S310, the second sub-data line of the broken data line is short-circuited with the second sub-repair line at the lower position. Figure 2 The second sub-data line of the broken data line is short-circuited with the second sub-repair line of the repair line 105 b of the second display area 113 b.

[0114] exist Figure 2 In the embodiment shown, the data driving unit 108 includes a first output channel and a second output channel. The first sub-data line 1031 is connected to the first output channel, and the repair line 105a / 105b is connected to the second output channel. The second output channel is an output channel in the data driving unit 108 that is not connected to any data line, that is, the second output channel is a redundant output channel of the data driving unit 108. The display panel repair method of the present application is applied to Figure 2 When the display panel shown in , before executing step S320, the display panel repair method further includes: recording position information of the broken data line, and configuring the data driving unit to output a driving signal to the second output channel based on a mapping relationship between the position information and the grayscale data.

[0115] For example, a first output channel is connected to six pixel electrodes, i.e., six sub-pixels, through a data line. The grayscale data configured by the timing controller 106 corresponding to the first output channel is 240, 240, 255, 255, 255, 255. The timing controller 106 outputs the grayscale data 240, 240, 255, 255, 255, 255 sequentially at different times, and the switching transistors of the six sub-pixels are turned on sequentially at different times. At the first moment, the switching transistor of the first sub-pixel is turned on, and the grayscale data output by the timing controller 106 is 240. The data driving unit 108 converts the grayscale data 240 into a pixel driving signal, and outputs it to the pixel electrode of the first sub-pixel through the first output channel; at the second moment, the switching transistor of the second sub-pixel is turned on, and the grayscale data output by the timing controller 106 is 240. The data driving unit 108 converts the grayscale data 240 into a pixel driving signal, and outputs it to the pixel electrode of the second sub-pixel through the first output channel; at the third moment, the switching transistor of the third sub-pixel is turned on, and the grayscale data output by the timing controller 106 is 255. The data driving unit 108 converts the grayscale data 255 into a pixel driving signal, and outputs it to the pixel electrode of the third sub-pixel through the first output channel; and so on for other grayscale data. If the data line has a breakpoint between the fourth sub-pixel and the third sub-pixel, the timing controller 106 obtains the grayscale data of the first output channel corresponding to the data line as 240, 240, 255, 255, 255, 255 according to the mapping relationship between the position information of the data line and the grayscale data, and maps the grayscale data 240, 240, 255, 255, 255, 255 to the second output channel. At the fourth moment, the switching transistor of the fourth sub-pixel is turned on, the grayscale data output by the timing controller 106 is 255, and the data driving unit 108 converts the grayscale data 255 into pixel driving data. signal, and outputs it to the pixel electrode of the fourth sub-pixel through the second output channel; at the fifth moment, the switching transistor of the fifth sub-pixel is turned on, and the grayscale data output by the timing controller 106 is 255. The data driving unit 108 converts the grayscale data 255 into a pixel driving signal, and outputs it to the pixel electrode of the fifth sub-pixel through the second output channel; at the sixth moment, the switching transistor of the sixth sub-pixel is turned on, and the grayscale data output by the timing controller 106 is 255. The data driving unit 108 converts the grayscale data 255 into a pixel driving signal, and outputs it to the pixel electrode of the sixth sub-pixel through the second output channel.

[0116] The display includes a memory 111, which is disposed on the second circuit board 110 and is connected to the timing controller 106. In one example, the data lines 103 on the display panel are sequentially coded from left to right. After executing step S310 and before executing step S320, the codes (position information) corresponding to the broken data lines are written into the memory. The timing controller maps the grayscale data corresponding to the broken data lines onto the repair lines by calling the coding information in the memory, thereby applying the corresponding pixel voltage to the second sub-data line.

[0117] This embodiment utilizes the redundant output channels of the data driving unit 108. When repairing a broken data line, it is only necessary to short-circuit the repair line 105a / 105b and the second sub-data line 1032. There is no need to short-circuit the repair line 105a / 105b and the first output channel originally corresponding to the broken data line, thereby reducing the repair difficulty and improving the repair efficiency.

[0118] See next Figure 8 In one embodiment of the present application, the display panel includes a repair line 105a and a repair line 105b. The repair line 105a and the repair line 105b are ring-shaped. The repair line 105a and the repair line 105b are arranged around the display area of ​​the display panel and overlap with the data line 103. The repair line 105a surrounds the periphery of the repair line 105b. If there is a broken data line on the display panel, in step S310, the second sub-data line of the broken data line is short-circuited with the repair line, and the first sub-data line of the broken data line is short-circuited with the repair line to obtain a display panel after the broken data line is repaired. Figure 8 In the illustrated embodiment, in the first display area, a broken data line has a breakpoint at position Q3. In step S310, the second sub-data line of the broken data line is short-circuited to the repair line 105a, and the first sub-data line of the broken data line is short-circuited to the repair line 105a. The short-circuit location is marked as P3. The second sub-data line is connected to the output channel to which the first sub-data line is connected via the repair line 105a. In the second display area, a broken data line has a breakpoint at position Q4. In step S310, the second sub-data line of the broken data line is short-circuited to the repair line 105b, and the first sub-data line of the broken data line is short-circuited to the repair line 105b. The short-circuit location is marked as P4. The second sub-data line is connected to the output channel to which the first sub-data line is connected via the repair line 105b.

[0119] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered merely as exemplary, and the true scope and spirit of the present application are indicated by the appended claims.

Claims

1. A display panel repair method, characterized in that: The display panel is a liquid crystal panel, including a repair line, a broken data line with a breakpoint, a data driving unit, and a memory. The broken data line is divided by the breakpoint into two non-conductive sub-data lines, a first sub-data line and a second sub-data line. The data driving unit includes a first output channel and a second output channel. The first sub-data line is connected to the first output channel, and the repair line is connected to the second output channel. The second output channel is an output channel in the data driving unit that is not connected to any data line. The display panel is provided with multiple display areas, and the multiple display areas are spaced apart. At least one repair line is provided on two opposite sides of each display area. The repair line is composed of a first sub-repair line and a second sub-repair line. The first sub-repair line extends along a first direction and is connected to the second output channel. The second sub-repair line extends along a second direction perpendicular to the first direction, and the second sub-repair line is arranged to overlap with the broken data line. The display panel repair method includes: short-circuiting the second sub-data line of the broken data line and the second sub-repair line to obtain a display panel after the broken data line is repaired; recording the position information of the broken data line in the memory, and configuring the signal output by the data driving unit to the second output channel based on a mapping relationship between the position information and the stored grayscale data, wherein the position information of all data lines on the display panel is encoded sequentially from left to right; selecting a plurality of selected grayscales from all grayscales corresponding to a repair area of ​​the display panel after the broken data line is repaired, the repair area being an area where sub-pixels corresponding to the second sub-data line are located; Obtaining grayscale compensation values ​​of the plurality of selected grayscales, wherein the grayscale compensation values ​​are used to make the brightness of the repaired area consistent with the brightness of the non-repaired area of ​​the display panel; Based on the grayscale compensation values ​​of the multiple selected grayscales, grayscale compensation values ​​of unselected grayscales corresponding to the repair area are obtained.

2. The display panel repair method according to claim 1, wherein: At least two of the multiple selected grayscales are non-adjacent grayscales, and obtaining the grayscale compensation value of the unselected grayscale corresponding to the repair area based on the grayscale compensation values ​​of the multiple selected grayscales includes: Obtaining a grayscale compensation value of a selected grayscale greater than a target grayscale and a grayscale compensation value of a selected grayscale less than the target grayscale among the multiple selected grayscales, wherein the target grayscale is any grayscale among the unselected grayscales corresponding to the repair area; Based on the grayscale compensation value of the selected grayscale greater than the target grayscale and the grayscale compensation value of the selected grayscale less than the target grayscale, a linear difference calculation is performed to obtain the grayscale compensation value of the target grayscale.

3. The display panel repair method according to claim 2, wherein: The step of performing linear difference calculation based on the grayscale compensation value of the selected grayscale greater than the target grayscale and the grayscale compensation value of the selected grayscale less than the target grayscale to obtain the grayscale compensation value of the target grayscale includes: Obtaining a first grayscale difference between the target grayscale and the selected grayscale smaller than the target grayscale, a second grayscale difference between the selected grayscale greater than the target grayscale and the selected grayscale smaller than the target grayscale, and a compensation value difference between the grayscale compensation value of the selected grayscale greater than the target grayscale and the grayscale compensation value of the selected grayscale smaller than the target grayscale; performing a product operation on the first grayscale difference and the compensation value difference, and performing a division operation on the product operation result and the second grayscale difference to obtain a compensation adjustment value; A grayscale compensation value of the target grayscale is obtained based on the compensation adjustment value and the grayscale compensation value of the selected grayscale that is smaller than the target grayscale.

4. The display panel repair method according to claim 1, wherein: The obtaining of the grayscale compensation values ​​of the plurality of selected grayscales includes: lighting up the display panel after the broken data line is repaired under different grayscale compensation values ​​set for the selected grayscale; The grayscale compensation value corresponding to the closest brightness between the repaired area and the non-repaired area of ​​the display panel after the broken data line is repaired is used as the grayscale compensation value of the selected grayscale.

5. The display panel repair method according to claim 4, wherein: Under the selected grayscale setting with different grayscale compensation values, before lighting up the display panel after the broken data line is repaired, the display panel repair method further includes: comparing a grayscale corresponding to the repair area with a grayscale threshold, wherein the grayscale threshold is smaller than a maximum grayscale of the display panel; If the grayscale corresponding to the repaired area is greater than the grayscale threshold, the grayscale corresponding to the repaired area and the grayscale of the non-repaired area surrounding the repaired area are lowered by a preset value, and then the display panel after the broken data line is repaired is illuminated under a different grayscale compensation value set for the selected grayscale; If the grayscale corresponding to the repaired area is less than the grayscale threshold, the step of lighting up the display panel after the broken data line is repaired under a grayscale compensation value different from the selected grayscale setting is directly performed.

6. The display panel repair method according to claim 1, wherein: The short-circuiting the second sub-data line of the broken data line and the second sub-repair line includes: Laser is used to illuminate the overlapping position of the second sub-repair line and the second sub-data line of the broken data line to short-circuit the second sub-data line and the second sub-repair line.

7. A display panel, characterized in that: The display panel is a liquid crystal panel, comprising a repair line, a broken data line with a breakpoint, a data driving unit, and a memory, wherein the broken data line is divided by the breakpoint into two non-conductive sub-data lines, a first sub-data line and a second sub-data line, the data driving unit comprising a first output channel and a second output channel, the first sub-data line being connected to the first output channel, the repair line being connected to the second output channel, the second output channel being an output channel in the data driving unit that is not connected to any data line, the display panel being provided with a plurality of display areas, the plurality of display areas being spaced apart, at least one repair line being provided on two opposite sides of each display area, the repair line being composed of a first sub-repair line and a second sub-repair line, the first sub-repair line extending along a first direction and being connected to the second output channel, the second sub-repair line extending along a second direction perpendicular to the first direction, and the second sub-repair line being arranged overlapping with the broken data line, and the display panel being repaired using the display panel repair method according to any one of claims 1 to 6.

8. A display, characterized in that: The display comprises: The display panel as claimed in claim 7; The backlight module is arranged opposite to the display panel and is used for providing backlight for the display panel.

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