Display module, display device and voltage regulation method

Abstract

The invention discloses a display module, a display device and a voltage regulation method. The display module comprises a display panel, a shielding layer and a display driving chip. The shielding layer is located on one side of the display panel. The display driving chip is respectively connected with the display panel and the shielding layer, and is used for driving the display panel to display an image and providing a target voltage signal for the shielding layer; the voltage of the target voltage signal is configured to be adjusted according to the change value of the color coordinate value of the display panel before the copper bar friction test and the change value of the color coordinate value after the copper bar friction test, so that the change value is in a set range.

Description

Technical Field

[0001] The present application belongs to the field of display technology, and specifically relates to a display module, a display device and a voltage regulation method. Background Art

[0002] In recent years, OLED (Organic Light-Emitting Diode) display technology has developed rapidly, and the performance requirements for OLED displays have become increasingly higher. Antistatic performance has always been a key design focus, and testing requirements have become increasingly stringent. Summary of the invention

[0003] The present application provides a display module, a display device and a voltage regulation method, which aim to at least to some extent solve the problem that the antistatic performance of display products cannot meet the test requirements.

[0004] In a first aspect of the present application, a display module is provided, the display module comprising: Display panel; A shielding layer, located on one side of the display panel; A display driver chip is connected to the display panel and the shielding layer, respectively, and is used to drive the display panel to display an image and provide a target voltage signal to the shielding layer. The voltage of the target voltage signal is configured to be adjusted according to the change value of the color coordinate value of the display panel before the copper rod friction test and the color coordinate value after the copper rod friction test, so that the change value is within a set range.

[0005] In some embodiments, when the voltage of the signal provided by the display driver chip to the shielding layer is the difference between the voltage of the target voltage signal and the voltage adjustment accuracy of the display driver chip, the change value is outside the set range.

[0006] In some embodiments, the display panel has a display area and a frame area surrounding the display area, and the shielding layer is located in the display area and / or the frame area.

[0007] In some embodiments, when the shielding layer is located in the frame area, the shielding layer includes a C-shaped line disposed at an edge of the display panel.

[0008] In some embodiments, when the shielding layer is located in the display area, the shielding layer includes a plurality of first connecting lines and a plurality of second connecting lines arranged in the display area, the plurality of first connecting lines extend along a first direction and are arranged in sequence at intervals along a second direction, the plurality of second connecting lines extend along the second direction and are arranged in sequence at intervals along the first direction, and the first connecting lines and the second connecting lines are cross-connected.

[0009] In some embodiments, the display driver chip is located in the border area, and the first connecting lines are arranged in sequence in a direction away from the display driver chip; The width of the first connecting line in a direction perpendicular to the first direction is greater than the width of the second connecting line in a direction perpendicular to the second direction.

[0010] In some embodiments, the shielding layer includes at least two shielding parts spaced apart from each other, the display driver chip has ports corresponding to the shielding parts, and the shielding parts are connected to the ports corresponding to the display driver chip.

[0011] In some embodiments, the shielding layer includes two shielding parts, namely a first shielding part and a second shielding part; the orthographic projections of the first shielding part and the second shielding part on the display panel are axisymmetric figures; The display driver chip is located in the frame area, and the symmetry axis of the axisymmetric figure passes through the orthographic projection of the display driver chip on the display panel.

[0012] In some embodiments, the shielding layer includes two shielding portions, namely a third shielding portion and a fourth shielding portion; the third shielding portion and the fourth shielding portion both include a C-shaped line disposed at an edge of the display panel; The border area includes a first border area, a second border area, a third border area and a fourth border area connected in sequence end to end, the display driver chip is located in the first border area, the C-shaped line of the third shielding part extends from the first border area through the second border area to the third border area, and the C-shaped line of the fourth shielding part extends from the first border area through the fourth border area to the third border area.

[0013] In some embodiments, the shielding layer includes two shielding parts, namely a fifth shielding part and a sixth shielding part; the fifth shielding part and the sixth shielding part each include a plurality of first connecting lines and a plurality of second connecting lines located in the display area, the plurality of first connecting lines extend along a first direction and are sequentially spaced along a second direction, the plurality of second connecting lines extend along the second direction and are sequentially spaced along the first direction; the first connecting lines and the second connecting lines of the fifth shielding part are cross-connected, and the first connecting lines and the second connecting lines of the sixth shielding part are cross-connected; The first connecting line of the fifth shielding part and the first connecting line of the sixth shielding part are aligned in the first direction; the display driver chip is located in the frame area, and the first connecting line of the fifth shielding part and the first connecting line of the sixth shielding part are respectively arranged in sequence along a direction away from the display driver chip.

[0014] In some embodiments, the display module further includes: The connecting line and the shielding layer are located on the same side of the display panel, and the shielding layer is connected to the display driving chip through the connecting line.

[0015] In some embodiments, the display panel further comprises a binding area, and the binding area is located on a side of the frame area away from the display area; the display module further comprises: A flexible circuit board is located on a side of the binding area away from the display area; the connecting line extends from the shielding layer through the binding area to the flexible circuit board, and extends from the flexible circuit board through the binding area to the display driver chip.

[0016] In a second aspect of the present application, a display device is provided, wherein the display device comprises the display module provided in the first aspect.

[0017] In a third aspect of the application, a voltage regulation method is provided, which is applicable to the display module provided in the first aspect, and the method comprises: Selecting a test point on the display panel and collecting the color coordinate value of the test point before the copper rod friction test; Controlling the display driver chip to provide a voltage signal to the shielding layer, and performing a copper rod friction test on the display panel; Collecting the color coordinate value of the test point after the copper rod friction test, and determining the change value of the color coordinate value of the test point before the copper rod friction test and the color coordinate value after the copper rod friction test; If the change value is within a set range, the voltage signal is used as a target voltage signal.

[0018] In some embodiments, the method further comprises: If the change value is outside the set range, the voltage of the voltage signal is gradually increased until the change value is within the set range.

[0019] In some implementations, if the change value is within a set range, taking the voltage signal as a target voltage signal includes: If the change value is within the set range, gradually reducing the voltage of the voltage signal until the change value is outside the set range; The voltage signal before the change value is outside the set range is used as the target voltage signal.

[0020] According to the display module, display device and voltage regulation method provided by one or more embodiments of the present application, the shielding layer is located on one side of the display panel. The display driver chip is connected to the display panel and the shielding layer respectively, and is used to drive the display panel to display an image and provide a target voltage signal to the shielding layer. The voltage of the target voltage signal is configured to be adjusted according to the color coordinate value of the display panel before the copper rod friction test and the change value of the color coordinate value after the copper rod friction test, so that the change value is within a set range. By applying a dynamically adjustable voltage to the shielding layer, different degrees of external electrostatic interference are shielded, the shielding layer is enhanced to ESD (English: Electro-Static discharge, Chinese: electrostatic release) interference shielding ability, improve the antistatic performance of the display module, reduce the risk of poor display of the display module during the copper rod friction test, and improve the display effect of the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 Schematic diagram showing the generation of negative charge by the copper rod friction test.

[0023] Figure 2 Shows Figure 1 Schematic diagram of the electric field generated by negative charges.

[0024] Figure 3 Shows Figure 1 Schematic diagram of the display module during the copper rod friction test.

[0025] Figure 4 A schematic diagram of the structure of a display module in one or more embodiments of the present application is shown.

[0026] Figure 5 Shows Figure 4 A schematic diagram of the process of adjusting the voltage of the display module.

[0027] Figure 6 A schematic structural diagram of a display module in another embodiment of the present application is shown.

[0028] Figure 7 A schematic structural diagram of a display module in yet another embodiment of the present application is shown.

[0029] Figure 8 A schematic structural diagram of a display module in yet another embodiment of the present application is shown.

[0030] Fig. 9 A schematic structural diagram of a display module in yet another embodiment of the present application is shown.

[0031] Fig.10 A schematic structural diagram of a display module in yet another embodiment of the present application is shown.

[0032] Fig.11 A partial structural schematic diagram of a display module in an embodiment of the present application is shown.

[0033] Fig.12 A partial structural schematic diagram of a display module in another embodiment of the present application is shown.

[0034] Fig.13 A schematic flow chart of a voltage regulation method in one or more embodiments of the present application is shown.

[0035] Explanation of the reference numerals: 1: copper rod; 2: glass cover plate; 3: substrate; 4: transistor; 10: display panel; 11: display area; 12: frame area; 121: first frame area; 122: second frame area; 123: third frame area; 124: fourth frame area; 13: binding area; 20: shielding layer; 21: first connecting line; 22: second connecting line; 23: shielding part; 231: first shielding part; 232: second shielding part; 233: third shielding part; 234: fourth shielding part; 235: fifth shielding part; 236: sixth shielding part; 30: display driver chip; 31: port; 40: connecting line; 50: flexible circuit board. DETAILED DESCRIPTION

[0036] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0037] In the related art, the display module can be provided with a shielding layer connected to a fixed voltage to shield signal interference. However, during the copper rod friction test, the negative charge generated by the friction between the copper rod 1 and the glass cover plate 2 of the display module will accumulate at the edge of the glass cover plate. Figure 1 Schematic diagram of generating negative charge for the copper rod friction test, see Figure 1 , negative charges repel each other, causing part of the negative charges to transfer along the edge of the display module. Figure 2 for Figure 1 For a schematic diagram of the electric field generated by negative charges, see Figure 2 , the negative charge is transferred to the substrate 3 which is arranged opposite to the display module and the glass cover 2, which will generate an induced electric field, causing the threshold voltage of the transistor 4 to shift positively, and the display screen of the display module will turn green, such as Figure 3 The position indicated by the arrow in the figure causes the copper rod friction test to fail.

[0038] Figure 4 For a schematic diagram of the structure of the display module in one or more embodiments of the present application, please refer to Figure 4 In a first aspect of the present application, a display module is provided, which includes a display panel 10, a shielding layer 20 and a display driver chip 30. The shielding layer 20 is located on one side of the display panel 10. The display driver chip 30 is connected to the display panel 10 and the shielding layer 20, respectively, and is used to drive the display panel 10 to display an image and provide a target voltage signal to the shielding layer 20. The voltage of the target voltage signal is configured to be adjusted according to the color coordinate value of the display panel before the copper rod friction test and the change value of the color coordinate value after the copper rod friction test, so that the change value is within a set range.

[0039] The display module includes a display panel 10, a shielding layer 20 and a display driver chip 30, wherein the shielding layer 20 is located on one side of the display panel 10, and the display driver chip 30 is connected to the display panel 10 and the shielding layer 20 respectively, and is used to drive the display panel 10 to display an image and provide a target voltage signal to the shielding layer 20, wherein the voltage of the target voltage signal is configured to be adjusted according to the color coordinate value of the display panel 10 before the copper rod friction test and the change value of the color coordinate value after the copper rod friction test, so that the change value is within a set range. By applying a dynamically adjustable voltage to the shielding layer 20 to offset the electric field generated by the negative charge, the influence of the negative charge on the threshold voltage of the transistor is eliminated, and the display panel is prevented from turning green after the copper rod friction test, so that the display module passes the copper rod friction test. Moreover, the electric field applied to the shielding layer 20 is variable, which can shield different degrees of electrostatic interference from the outside world, enhance the shielding ability of the shielding layer to ESD interference, improve the antistatic performance of the display module, reduce the risk of poor display of the display module during the copper rod friction test, and enhance the display effect of the display module. In addition, the implementation is simple and the cost is low.

[0040] Exemplarily, when the change value is within the set range, the display panel 10 does not turn green during the copper rod friction test. The signal voltage provided by the display driver chip 30 to the shielding layer 20 is dynamically adjusted according to the change value, thereby changing the generated electric field strength, and finally determining the appropriate electric field strength to completely offset the electric field generated by the negative charge during the test, so that the display module passes the copper rod friction test.

[0041] In some embodiments, when the voltage of the signal provided by the display driver chip 30 to the shielding layer 20 is the difference between the voltage of the target voltage signal and the voltage adjustment accuracy of the display driver chip 30 , the variation value is outside the set range.

[0042] Exemplarily, when the change value is outside the set range, the display panel 10 appears green during the copper rod friction test.

[0043] Exemplarily, the voltage regulation accuracy of the display driver chip 30 is the minimum change value of the voltage of the signal provided by the display driver chip 30. For example, the voltage of the signal provided by the display driver chip 30 can be 1V, 2V, 3V, 4V and 5V, and the voltage regulation accuracy of the display driver chip 10 is 1V. For another example, the voltage of the signal provided by the display driver chip 30 can be 1V, 1.1V, 1.2V, 1.3V, 1.4V and 1.5V, and the voltage regulation accuracy of the display driver chip 10 is 0.1V.

[0044] For example, the voltage regulation accuracy of the display driver chip 30 is 0.1V, and the voltage of the target voltage signal whose variation value is within the set range is greater than or equal to 5V. It can be seen that the voltage of the target voltage signal can be 5V, 5.1V, 5.2V, 5.3V, 5.4V, 5.5V, etc. Among them, 5V is the minimum value, and the power consumption of the display module is the lowest at this time.

[0045] When the voltage of the target voltage signal is 5V, the difference between the voltage of the target voltage signal and the voltage regulation accuracy of the display driver chip 30 is 4.9V, and when the voltage of the signal provided by the display driver chip 30 to the shielding layer 20 is 4.9V, the variation value is outside the set range.

[0046] When the voltage of the target voltage signal is 5.1V, the difference between the voltage of the target voltage signal and the voltage regulation accuracy of the display driver chip 30 is 5V, and when the voltage of the signal provided by the display driver chip 30 to the shielding layer 20 is 5V, the change value is within the set range.

[0047] When the voltage of the target voltage signal is 5.2V, the difference between the voltage of the target voltage signal and the voltage regulation accuracy of the display driver chip 30 is 5.1V, and when the voltage of the signal provided by the display driver chip 30 to the shielding layer 20 is 5.1V, the change value is within the set range.

[0048] When the voltage of the target voltage signal is 5.3V, the difference between the voltage of the target voltage signal and the voltage regulation accuracy of the display driver chip 30 is 5.2V, and when the voltage of the signal provided by the display driver chip 30 to the shielding layer 20 is 5.2V, the change value is within the set range.

[0049] When the voltage of the target voltage signal is 5.4V, the difference between the voltage of the target voltage signal and the voltage regulation accuracy of the display driver chip 30 is 5.3V, and when the voltage of the signal provided by the display driver chip 30 to the shielding layer 20 is 5.3V, the change value is within the set range.

[0050] When the voltage of the target voltage signal is 5.5V, the difference between the voltage of the target voltage signal and the voltage regulation accuracy of the display driver chip 30 is 5.4V, and when the voltage of the signal provided by the display driver chip 30 to the shielding layer 20 is 5.4V, the change value is within the set range.

[0051] It can be seen that only when the voltage of the target voltage signal is 5V, if the voltage of the signal provided by the display driver chip 30 to the shielding layer 20 is the difference between the voltage of the target voltage signal and the voltage adjustment accuracy of the display driver chip 30, the change value is outside the set range, and the power consumption of the display module is the lowest at this time.

[0052] Therefore, by limiting the condition that when the voltage of the signal provided by the display driver chip 30 to the shielding layer 20 is the difference between the voltage of the target voltage signal and the voltage adjustment accuracy of the display driver chip 30, the change value is outside the set range, and the target voltage signal can be obtained to minimize the power consumption of the display module.

[0053] In the above embodiment, when the display driver chip 30 provides the target voltage signal to the shielding layer 20, the change value is within the set range, and when the voltage of the provided signal only reduces the voltage regulation accuracy of the display driver chip 30, the change value is outside the set range, which means that the voltage of the target voltage signal can just make the change value within the set range, which can effectively reduce the power consumption of the display module.

[0054] Figure 5 for Figure 4 For a flow chart of the display module voltage regulation process, please refer to Figure 5 In practical applications, the display driver chip 30 can first provide a preset voltage signal to the shielding layer 20 for a copper rod friction test. If the change value is outside the set range, the test fails, and the signal voltage can be gradually increased until the change value is within the set range and the test passes. At this time, the signal voltage when the test passes is the voltage of the target voltage signal. If the test passes, the signal voltage can also be gradually reduced until the test fails. At this time, the signal voltage before the test fails is the voltage of the target voltage signal. Exemplarily, the preset voltage can be set according to historical data and experience.

[0055] In some embodiments, the display driver chip 30 may have a GPIO (General Purpose Input / Outpu, General Purpose Input / Outpu) port, and the shielding layer 20 is connected to the GPIO port of the display driver chip 30. The voltage regulation accuracy of the GPIO port can reach 0.1V, which is beneficial for the display driver chip 30 to provide a suitable voltage for the shielding layer 20, and the generated electric field strength just offsets the electric field generated by the negative charge, thereby controlling and reducing the power consumption of the display module.

[0056] Exemplarily, the display driver chip 30 may be selected according to the number of GPIO ports required by the shielding layer 20 , and the GPIO ports of the display driver chip 30 may be selected according to the voltage range and voltage regulation accuracy of the target voltage signal.

[0057] In some embodiments, the display driving chip 30 may be located on the same side as the display panel 10 .

[0058] Exemplarily, the display driving chip 30 may be located at an edge of the display panel 10 .

[0059] In some embodiments, see Figure 4 The display panel 10 may include a display area 11 and a frame area 12 surrounding the display area 11 .

[0060] Exemplarily, the display driving chip 30 may be located in the border area 12 .

[0061] In one possible embodiment, see Figure 4 , the shielding layer 20 may be located in the border area 12 .

[0062] The greening phenomenon of the display panel 10 after the copper rod friction test is mainly due to the accumulation of negative charges at the edge of the display panel 10. Here, a shielding layer 20 is set in the border area 12 surrounding the display area 11, and a target voltage signal is provided to the shielding layer 20 according to the copper rod friction test result, which can effectively resist and offset the electric field generated by the negative charges, eliminate the influence of the negative charges on the threshold voltage of the transistor, and improve the greening phenomenon of the display module after the copper rod friction test.

[0063] For example, see Figure 4 The shielding layer 20 may include a C-shaped line disposed at the edge of the display panel 10. For example, the C-shaped line in the shielding layer 20 may surround the display area 11 from one end of the display driver chip 30 and reach the other end of the display driver chip 11.

[0064] In other possible embodiments, the shielding layer 20 may also include a ring-shaped line disposed at the edge of the display panel 10. The shielding layer 20 may also include a plurality of shielding portions sequentially disposed along the edge of the display panel 10.

[0065] Figure 6 For another structural diagram of a display module in another embodiment of the present application, please refer to Figure 6 In another possible embodiment, the shielding layer 20 may be located in the display area 11 .

[0066] For example, see Figure 6 The shielding layer 20 may include a plurality of first connection lines 21 and a plurality of second connection lines 22 disposed in the display area 11. The plurality of first connection lines 21 extend along the first direction and are sequentially spaced along the second direction. The plurality of second connection lines 22 extend along the second direction and are sequentially spaced along the first direction. The first connection lines 21 and the second connection lines 22 are cross-connected to form a mesh structure.

[0067] In other possible embodiments, the shielding layer 20 may also include a plurality of first connection lines 21 disposed in the display area 11, the plurality of first connection lines 21 extending along the first direction and sequentially spaced along the second direction. The shielding layer 20 may also include a plurality of second connection lines 22 extending along the second direction and sequentially spaced along the first direction.

[0068] For example, see Figure 6 , the first direction and the second direction may be perpendicular to each other.

[0069] For example, see Figure 6 , the first direction may be parallel to a portion of the boundary line of the display area 11 , and the second direction may be parallel to a portion of the boundary line of the display area 11 .

[0070] For example, see Figure 6 , the first connection lines 21 can be evenly distributed in the display area 11 , and the second connection lines 22 can be evenly distributed in the display area 11 .

[0071] For example, see Figure 6 The first connection lines 21 are sequentially arranged in a direction away from the display driving chip 30. The width of the first connection lines 21 perpendicular to the first direction may be greater than the width of the second connection lines 22 perpendicular to the second direction.

[0072] In yet another possible embodiment, the shielding layer 20 may be located in the display area 11 and the frame area 12 .

[0073] Figure 7 This is a structural diagram of a display module in another embodiment of the present application. Please participate Figure 7 In some embodiments, the shielding layer 20 may include at least two shielding parts 23 spaced apart from each other, the display driver chip 30 has ports 31 corresponding to each shielding part 23 , and the shielding part 23 is connected to the ports 31 corresponding to the display driver chip 30 .

[0074] Exemplarily, the shielding portions 23 in the shielding layer 20 may all be located in the frame area 12 , may all be located in the display area 11 , or may be partially located in the display area 11 and the other partially located in the frame area 12 .

[0075] by Figure 7 For example, the shielding layer 20 includes two shielding parts 23, one shielding part 23 is located in the frame area 12, and the other shielding part 23 is located in the display area 11. At this time, the shielding layer 20 is located in the display area 11 and the frame area 12 at the same time. The two shielding parts 23 are respectively connected to the ports 31 corresponding to the display driver chip 30. The display driver chip 30 can provide target voltage signals with different voltages to the two shielding parts 23 respectively. The shielding part 23 located in the frame area 12 is conducive to the display module passing the copper rod friction test, and the shielding part 23 located in the display area 11 is conducive to the display module passing other tests, such as reliability test.

[0076] In the above embodiment, the shielding layer 20 is partitioned and divided into mutually independent shielding parts 23, and the display driver chip 30 provides target voltage signals respectively, so that the electric field strength can be designed separately for the area where the charge is easy to accumulate, taking into account both anti-interference and power consumption. For example, the frame area 12 is easier to accumulate charge than the display area 11, so a target voltage signal with a larger voltage is provided to the shielding part 23 of the frame area 12, and a target voltage signal with a smaller voltage is provided to the shielding part 23 of the display area 11.

[0077] Exemplarily, the port 31 in the display driver chip 30 corresponding to the shielding portion 23 may be a GPIO port.

[0078] Figure 8 This is a structural diagram of a display module in another embodiment of the present application. Figure 8 In some embodiments, the shielding layer 20 may include two shielding portions 23, namely a first shielding portion 231 and a second shielding portion 232. The orthographic projections of the first shielding portion 231 and the second shielding portion 232 on the display panel 10 are axially symmetrical figures. The symmetry axis of the axially symmetrical figure passes through the orthographic projection of the display driver chip 30 on the display panel 10.

[0079] Exemplarily, the first shielding portion and the second shielding portion may both be located in the frame area 12 , or may both be located in the display area 11 .

[0080] Fig. 9 This is a structural diagram of a display module in another embodiment of the present application. Fig. 9 In some embodiments, the shielding layer 20 may include two shielding portions 23 , namely a third shielding portion 233 and a fourth shielding portion 234 . The third shielding portion 233 and the fourth shielding portion 234 both include a C-shaped line disposed at the edge of the display panel 10 .

[0081] The frame area 12 includes a first frame area 121, a second frame area 122, a third frame area 123 and a fourth frame area 124 which are connected end to end. The display driver chip 30 is located in the first frame area 121. The C-shaped line of the third shielding portion 233 extends from the first frame area 121 through the second frame area 122 to the third frame area 123. The C-shaped line of the fourth shielding portion 234 extends from the first frame area 121 through the fourth frame area 124 to the third frame area 122.

[0082] The greening phenomenon that appears on the display panel 10 after the copper rod friction test is usually in a local area of ​​the edge. It may be that different positions on the edge of the display panel 10 have different anti-interference capabilities to the electric field generated by negative charges. The border area 12 can be divided into regions according to the copper rod friction test results, and each region is provided with an independent shielding part 23 and is respectively connected to the corresponding port of the display driver chip 30, so as to provide a target voltage signal of corresponding voltage according to the degree to which each region is affected by the electric field generated by negative charges.

[0083] For example, the orthographic projections of the third shielding portion 233 and the fourth shielding portion 234 on the display panel 10 may be axisymmetric shapes or non-axisymmetric shapes. Fig. 9 For example, the area occupied by the third shielding portion 233 in the first frame area 121 is larger than the area occupied by the fourth shielding portion 234 in the first frame area 121 .

[0084] Fig.10 This is a structural diagram of a display module in another embodiment of the present application. Fig.10 In some embodiments, the shielding layer 20 may include two shielding parts 23, namely a fifth shielding part 235 and a sixth shielding part 236. The fifth shielding part 235 and the sixth shielding part 236 each include a plurality of first connection lines 21 and a plurality of second connection lines 22 located in the display area 11. The plurality of first connection lines 21 extend along the first direction and are sequentially spaced along the second direction. The plurality of second connection lines 22 extend along the second direction and are sequentially spaced along the first direction.

[0085] The first connection line 21 and the second connection line 22 of the fifth shielding part 235 are cross-connected. The first connection line 21 and the second connection line 22 of the sixth shielding part 236 are cross-connected. The first connection line 21 of the fifth shielding part 235 and the first connection line 21 of the sixth shielding part 236 are aligned in the first direction. The first connection line 21 of the fifth shielding part 235 and the first connection line 21 of the sixth shielding part 236 are respectively arranged in sequence in a direction away from the display driver chip 30.

[0086] Different areas of the display area 11 may also have different anti-interference capabilities against external electric fields. The display area 11 is partitioned and an independent shielding part 23 is set in each area. The shielding parts 23 of each area are respectively connected to the corresponding ports 31 of the display driver chip 30, so as to provide target voltage signals of corresponding voltages according to the degree to which each area is affected by the electric field generated by negative charges.

[0087] For example, see Fig.10 , the first direction and the second direction may be perpendicular to each other.

[0088] For example, see Fig.10 , the first direction may be parallel to a portion of the boundary line of the display area 11 , and the second direction may be parallel to a portion of the boundary line of the display area 11 .

[0089] For example, see Fig.10 The first connecting lines 21 can be evenly distributed in the distribution area of ​​the fifth shielding part and the distribution area of ​​the sixth shielding part, and the second connecting lines 22 can be evenly distributed in the distribution area of ​​the fifth shielding part and the distribution area of ​​the sixth shielding part.

[0090] For example, see Fig.10 The first connection lines 21 are sequentially arranged in a direction away from the display driving chip 30. The width d1 of the first connection line 21 perpendicular to the first direction may be greater than the width d2 of the second connection line 22 perpendicular to the second direction.

[0091] Exemplarily, the orthographic projections of the fifth shielding portion 235 and the sixth shielding portion 236 on the display panel 10 may be axisymmetric figures or non-axisymmetric figures.

[0092] In some embodiments, see Figure 4 , Figure 5-Figure 10 The display module may further include a connecting line 40 , wherein the connecting line 40 and the shielding layer 20 are located on the same side of the display panel 10 , and the shielding layer 20 is connected to the display driving chip 30 via the connecting line 40 .

[0093] Fig.11 This is a partial structural diagram of a display module in an embodiment of the present application. Fig.11 In a possible embodiment, the connection line 40 extends from the shielding layer 20 through the frame area 12 to the display driver chip 30 .

[0094] Fig.12 This is a partial structural diagram of a display module in another embodiment of the present application. Fig.12 In some embodiments, the display panel 10 may further include a binding area 13 , and the binding area 13 is located on a side of the frame area 12 away from the display area 11 .

[0095] The display module may further include a flexible circuit board 50, which is located on a side of the binding area 13 away from the display area 11. The connection line 40 extends from the shielding layer 20 through the binding area 13 to the flexible circuit board 50, and extends from the flexible circuit board 50 through the binding area 13 to the display driver chip 30.

[0096] Compared with the connection line 40 directly connecting from the shielding layer 20 to the display driver chip 30, the connection line 40 passes through the binding area 13 and is wound around the flexible circuit board 50. This does not need to be wound on the display panel 10 and occupies more space of the display panel 10, which is beneficial to the impedance optimization of the line in the display panel 10.

[0097] A second aspect of the present application provides a display device, which includes the display module provided by any of the above embodiments.

[0098] Fig.13 For a schematic diagram of the structure of the display module in one or more embodiments of the present application, please refer to Fig.13 The third aspect of the present application provides a voltage regulation method applicable to the display module provided by the first aspect of the present application. The method includes the following steps S101 to S104.

[0099] Step S101, selecting a test point on the display panel, and collecting the color coordinate value of the test point before the copper rod friction test.

[0100] Step S102, controlling the display driver chip to provide a voltage signal to the shielding layer, and performing a copper rod friction test on the display panel.

[0101] Step S103, collecting the color coordinate value of the test point after the copper rod friction test, and determining the change value of the color coordinate value of the test point before the copper rod friction test and the color coordinate value after the copper rod friction test.

[0102] Exemplarily, the copper rod friction test refers to rubbing the cover plate of the display panel with a copper rod, and observing whether the display panel will turn green during the friction process, so as to determine whether the provided voltage signal meets the requirements. If charge accumulation occurs at the edge of the cover plate after continuous friction for a set period of time, it will affect the light-emitting devices in the display panel, causing the display panel to turn green. At this time, the change value will be outside the set range, indicating that the provided voltage signal does not meet the requirements and cannot be used as a target voltage signal and needs to be adjusted. If the display panel does not turn green, it means that the provided voltage meets the requirements and can be used as a target voltage signal.

[0103] Step S104: if the change value is within the set range, the voltage signal is used as the target voltage signal.

[0104] For example, L1(x1, y1) is the brightness and color coordinates of the test point before the copper rod friction test, and L2(x2, y2) is the brightness and color coordinates of the test point after the copper rod friction test. If |x2-x1| / x1≤k1 or |y2-y1| / y1≤k2, the change value is within the set range. If |x2-x1| / x1>k1 or |y2-y1| / y1>k2, the change value is outside the set range. Among them, k1 and k2 are set values.

[0105] For example, the setting range can be set according to the customer's acceptance criteria for the greening phenomenon of the display panel. If the display panel turns green when the change value is within the setting range, the customer can accept it and the acceptance is passed. If the display panel turns green when the change value is outside the setting range, the customer cannot accept it and the acceptance is failed.

[0106] In some embodiments, the method may further include the following step: if the change value is outside the set range, gradually increasing the voltage of the voltage signal until the change value is within the set range.

[0107] For example, before the copper rod friction test, the color coordinate value a0 of the test point is collected as the color coordinate value of the test point before the copper rod friction test. Then, the control display driver chip provides a first voltage signal (signal voltage is V1) to the shielding layer, and the display panel is subjected to the copper rod friction test, and after the copper rod friction test, the color coordinate value a1 of the test point is collected as the color coordinate value of the test point after the copper rod friction test, and the color coordinate value of the test point before the copper rod friction test and the color coordinate value after the copper rod friction test are obtained. The change value |a1-a0| of the color coordinate value of the test point before the copper rod friction test and the color coordinate value after the copper rod friction test. If the change value |a1-a0| is outside the set range, the control display driver chip provides a second voltage signal (signal voltage is V2=V1+△V) to the shielding layer, and the display panel is subjected to the copper rod friction test, and after the copper rod friction test, the color coordinate value a2 of the test point is collected to obtain the change value |a2-a0|. If the change value |a2-a0| is outside the set range, the control display driver chip provides a third voltage signal (signal voltage is V3=V2+△V) to the shielding layer, and the display panel is subjected to a copper rod friction test. After the copper rod friction test, the color coordinate value a3 of the test point is collected to obtain the change value |a3-a0|. If the change value |a3-a0| is within the set range, the third voltage signal is used as the target voltage signal.

[0108] In some embodiments, step S104 may include the following steps: if the change value is within the set range, gradually reducing the voltage of the voltage signal until the change value is outside the set range; and using the voltage signal before the change value is outside the set range as the target voltage signal.

[0109] For example, before the copper rod friction test, the color coordinate value a0 of the test point is collected as the color coordinate value of the test point before the copper rod friction test. Then, the control display driver chip provides a first voltage signal (signal voltage is V1) to the shielding layer, and the display panel is subjected to the copper rod friction test, and after the copper rod friction test, the color coordinate value a1 of the test point is collected as the color coordinate value of the test point after the copper rod friction test, and the change value |a1-a0| of the color coordinate value of the test point before the copper rod friction test and the color coordinate value after the copper rod friction test is obtained. If the change value |a1-a0| is within the set range, the control display driver chip provides a second voltage signal (signal voltage is V2=V1-△V) to the shielding layer, and the display panel is subjected to the copper rod friction test, and after the copper rod friction test, the color coordinate value a2 of the test point is collected to obtain the change value |a2-a0|. If the change value |a2-a0| is within the set range, the control display driver chip provides a third voltage signal (signal voltage is V3=V2-△V) to the shielding layer, and the display panel is subjected to a copper rod friction test. After the copper rod friction test, the color coordinate value a3 of the test point is collected to obtain the change value |a3-a0|. If the change value |a3-a0| is outside the set range, the second voltage signal is used as the target voltage signal.

[0110] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0111] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0112] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0113] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0114] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A display module, characterized in that: The display module comprises: Display panel; A shielding layer, located on one side of the display panel; A display driver chip is connected to the display panel and the shielding layer, respectively, and is used to drive the display panel to display an image and provide a target voltage signal to the shielding layer. The voltage of the target voltage signal is configured to be adjusted according to the change value of the color coordinate value of the display panel before the copper rod friction test and the color coordinate value after the copper rod friction test, so that the change value is within a set range.

2. The display module according to claim 1, characterized in that: When the voltage of the signal provided by the display driver chip to the shielding layer is the difference between the voltage of the target voltage signal and the voltage adjustment accuracy of the display driver chip, the change value is outside the set range.

3. The display module according to claim 1 or 2, characterized in that: The display panel has a display area and a frame area surrounding the display area, and the shielding layer is located in the display area and / or the frame area.

4. The display module according to claim 3, characterized in that: When the shielding layer is located in the frame area, the shielding layer includes a C-shaped line arranged at an edge of the display panel.

5. The display module according to claim 3, characterized in that: When the shielding layer is located in the display area, the shielding layer includes a plurality of first connecting lines and a plurality of second connecting lines arranged in the display area, the plurality of first connecting lines extend along the first direction and are arranged in sequence at intervals along the second direction, the plurality of second connecting lines extend along the second direction and are arranged in sequence at intervals along the first direction, and the first connecting lines and the second connecting lines are cross-connected.

6. The display module according to claim 5, characterized in that: The display driver chip is located in the frame area, and the first connecting lines are arranged in sequence in a direction away from the display driver chip; The width of the first connecting line in a direction perpendicular to the first direction is greater than the width of the second connecting line in a direction perpendicular to the second direction.

7. The display module according to claim 3, characterized in that: The shielding layer includes at least two shielding parts spaced apart from each other, the display driving chip has ports corresponding to the shielding parts, and the shielding parts are connected to the ports corresponding to the display driving chip.

8. The display module according to claim 7, characterized in that: The shielding layer comprises two shielding parts, namely a first shielding part and a second shielding part; the orthographic projections of the first shielding part and the second shielding part on the display panel are axisymmetric figures; The display driver chip is located in the frame area, and the symmetry axis of the axisymmetric figure passes through the orthographic projection of the display driver chip on the display panel.

9. The display module according to claim 7, characterized in that: The shielding layer comprises two shielding parts, namely a third shielding part and a fourth shielding part; the third shielding part and the fourth shielding part both comprise a C-shaped line arranged at the edge of the display panel; The border area includes a first border area, a second border area, a third border area and a fourth border area connected in sequence end to end, the display driver chip is located in the first border area, the C-shaped line of the third shielding part extends from the first border area through the second border area to the third border area, and the C-shaped line of the fourth shielding part extends from the first border area through the fourth border area to the third border area.

10. The display module according to claim 7, characterized in that: The shielding layer includes two shielding parts, namely a fifth shielding part and a sixth shielding part; the fifth shielding part and the sixth shielding part each include a plurality of first connecting lines and a plurality of second connecting lines located in the display area, the plurality of first connecting lines extend along a first direction and are sequentially spaced along a second direction, the plurality of second connecting lines extend along the second direction and are sequentially spaced along the first direction; the first connecting lines and the second connecting lines of the fifth shielding part are cross-connected, and the first connecting lines and the second connecting lines of the sixth shielding part are cross-connected; The first connecting line of the fifth shielding part and the first connecting line of the sixth shielding part are aligned in the first direction; the display driver chip is located in the frame area, and the first connecting line of the fifth shielding part and the first connecting line of the sixth shielding part are respectively arranged in sequence along a direction away from the display driver chip.

11. The display module according to claim 3, characterized in that: The display module also includes: The connecting line and the shielding layer are located on the same side of the display panel, and the shielding layer is connected to the display driving chip through the connecting line.

12. The display module according to claim 11, characterized in that: The display panel further comprises a binding area, and the binding area is located on a side of the frame area away from the display area; the display module further comprises: A flexible circuit board is located on a side of the binding area away from the display area; the connecting line extends from the shielding layer through the binding area to the flexible circuit board, and extends from the flexible circuit board through the binding area to the display driver chip.

13. A display device, characterized in that: The display device comprises the display module as described in any one of claims 1-12.

14. A voltage regulation method, characterized in that: Applicable to the display module according to any one of claims 1 to 12, the method comprising: Selecting a test point on the display panel and collecting the color coordinate value of the test point before the copper rod friction test; Controlling the display driver chip to provide a voltage signal to the shielding layer, and performing a copper rod friction test on the display panel; Collecting the color coordinate value of the test point after the copper rod friction test, and determining the change value of the color coordinate value of the test point before the copper rod friction test and the color coordinate value after the copper rod friction test; If the change value is within a set range, the voltage signal is used as a target voltage signal.

15. The method according to claim 14, characterized in that The method further comprises: If the change value is outside the set range, the voltage of the voltage signal is gradually increased until the change value is within the set range.

16. The method according to claim 14, characterized in that If the change value is within a set range, taking the voltage signal as a target voltage signal includes: If the change value is within the set range, gradually reducing the voltage of the voltage signal until the change value is outside the set range; The voltage signal before the change value is outside the set range is used as the target voltage signal.

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