Display module, display device and working method thereof

Abstract

The present invention provides a display module, a display device and a working method thereof, which belong to the field of display technology. The display module includes: a display panel, the display panel includes a signal line for binding with a driving chip; a power module for providing an electrical signal; a potential monitoring module for monitoring the potential of the signal line, and when the potential of the signal line is greater than a preset value, controlling the negative electrode of the power module to be connected to the signal line; when the potential of the signal line is less than or equal to a preset value, controlling the negative electrode of the power module to be disconnected from the signal line. The technical solution of the present invention can prevent the signal line of the display panel from being corroded.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display module, a display device and a working method thereof. Background Art

[0002] For display panels, circuit corrosion has always been a problem that needs to be solved, especially in the area where COF (chip on film) and the display panel are bound. Usually, waterproof glue is applied here to waterproof it, but since the glue coating process cannot be standardized, even the best waterproof glue cannot eliminate the problem of water vapor intrusion. Once water vapor invades the interior of the display panel, the signal line of the display panel is very likely to be electrochemically corroded, which will greatly affect both the display quality and reliability. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a display module, a display device and a working method thereof, which can prevent the signal lines of the display panel from being corroded.

[0004] To solve the above technical problems, the embodiments of the present invention provide the following technical solutions:

[0005] In one aspect, a display module is provided, comprising:

[0006] A display panel, the display panel comprising a signal line for binding with a driving chip;

[0007] A power module, used for providing electrical signals;

[0008] A potential monitoring module is used to monitor the potential of the signal line. When the potential of the signal line is greater than a preset value, the negative electrode of the power supply module is controlled to be connected to the signal line; when the potential of the signal line is less than or equal to the preset value, the negative electrode of the power supply module is controlled to be disconnected from the signal line.

[0009] In some embodiments, it also includes:

[0010] a first conductive pattern connected to the signal line and arranged in a different layer from the signal line, the first conductive pattern being connected to the negative electrode of the power module; and / or

[0011] A second conductive pattern connected to the signal line and arranged in a different layer from the signal line, wherein the second conductive pattern is connected to the positive electrode of the power module.

[0012] In some embodiments, it also includes:

[0013] A first connection pattern, having a first insulating layer between it and the signal line, and having a second insulating layer between it and the first conductive pattern, wherein the first connection pattern is connected to the signal line via a via hole penetrating the first insulating layer, and the first connection pattern is connected to the first conductive pattern via a via hole penetrating the second insulating layer; and / or

[0014] The second connecting pattern is separated from the signal line by a third insulating layer and separated from the second conductive pattern by a fourth insulating layer. The second connecting pattern is connected to the signal line through a via hole penetrating the third insulating layer, and the second connecting pattern is connected to the second conductive pattern through a via hole penetrating the fourth insulating layer.

[0015] In some embodiments, a first orthographic projection of the first conductive pattern on the base substrate of the display panel does not overlap with a second orthographic projection of the signal line on the base substrate;

[0016] A third orthographic projection of the second conductive pattern on the base substrate of the display panel does not overlap with a second orthographic projection of the signal line on the base substrate.

[0017] In some embodiments, the shortest distance between the first orthographic projection and the second orthographic projection is greater than 2 um;

[0018] The shortest distance between the third orthographic projection and the second orthographic projection is greater than 2 um.

[0019] In some embodiments, the signal line is connected to a driving chip, and the first conductive pattern is provided in the same layer and with the same material as a source / drain metal layer of the display panel; and / or

[0020] The second conductive pattern is provided in the same layer and with the same material as the source / drain metal layer of the display panel.

[0021] In some embodiments, the first conductive pattern is made of an inert metal; and / or

[0022] The second conductive pattern is made of inert metal.

[0023] An embodiment of the present invention further provides a display device, comprising the display module as described above.

[0024] An embodiment of the present invention further provides a working method of a display device, which is applied to the display device as described above, and the working method includes:

[0025] A potential monitoring module is used to monitor the potential of the signal line. When the potential of the signal line is greater than a preset value, the negative pole of the power module is controlled to be connected to the signal line; when the potential of the signal line is less than or equal to the preset value, the negative pole of the power module is controlled to be disconnected from the signal line.

[0026] In some embodiments, the method specifically comprises:

[0027] The potential monitoring module monitors the potential of the signal line, and sends an enable signal to the power module when the potential of the signal line is greater than a preset value; and sends a disable signal to the power module when the potential of the signal line is less than or equal to the preset value;

[0028] The power module outputs an electrical signal to the signal line after receiving an enable signal; and stops outputting the electrical signal to the signal line after receiving a disable signal.

[0029] The embodiments of the present invention have the following beneficial effects:

[0030] In the above scheme, after water vapor invades the display panel, it will cause corrosion of the signal line. When the signal line corrodes, it will lose electrons and the potential will rise. When the potential of the signal line is monitored to be greater than the preset value, this embodiment determines that the signal line is about to corrode, controls the negative pole of the power module to be connected to the signal line, replenishes electrons into the signal line, and prevents corrosion from occurring, thereby avoiding display abnormalities and poor reliability caused by corrosion of the display panel circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1-Figure 2 It is a structural schematic diagram of a display module according to an embodiment of the present invention;

[0032] Figure 3 Schematic diagram of the working process of the display device according to an embodiment of the present invention.

[0033] Reference numerals

[0034] 01 Signal line

[0035] 02 Second conductive pattern

[0036] 03 The first conductive pattern

[0037] 04 First Connection Graphics

[0038] 05 Second connection graphic

[0039] 06 Display Panel

[0040] 07 flip chip film

[0041] 08 Driver chip

[0042] 09 Power Module

[0043] 10 Potential monitoring module DETAILED DESCRIPTION

[0044] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0045] Embodiments of the present invention provide a display module, a display device and a working method thereof, which can prevent a signal line of a display panel from being corroded.

[0046] An embodiment of the present invention provides a display module, comprising:

[0047] A display panel, the display panel comprising a signal line;

[0048] A power module, used for providing electrical signals;

[0049] A potential monitoring module is used to monitor the potential of the signal line. When the potential of the signal line is greater than a preset value, the negative electrode of the power supply module is controlled to be connected to the signal line; when the potential of the signal line is less than or equal to the preset value, the negative electrode of the power supply module is controlled to be disconnected from the signal line.

[0050] In this embodiment, after water vapor invades the display panel, it will cause corrosion of the signal line. When the signal line corrodes, it will lose electrons and the potential will rise. When the potential of the signal line is monitored to be greater than a preset value, this embodiment determines that the signal line is about to corrode, controls the negative pole of the power module to be connected to the signal line, and replenishes electrons into the signal line to prevent corrosion from occurring, thereby avoiding display abnormalities and poor reliability caused by corrosion of the display panel circuit.

[0051] Among them, the signal lines of the display panel include but are not limited to data lines, gate lines, clock signal lines, power supply voltage lines, reference voltage lines, etc. The signal lines are generally made of metals with good electrical conductivity. After water vapor invades the display panel, the signal lines will be corroded, which will cause display abnormalities and poor reliability. In this embodiment, when the display module is not displaying, the potential of the signal line is monitored. When the potential of the signal line is monitored to be greater than a preset value (which can be 0), the negative electrode of the control power module is connected to the signal line, and electrons are added to the signal line to prevent corrosion; when the potential of the signal line is monitored to be less than or equal to the preset value, the electrons are stopped from being added to the signal line. In this embodiment, the circuit corrosion is suppressed by adding electrons to the signal line that is about to corrode to achieve potential balance. Even if water vapor intrusion into the display panel is unavoidable, corrosion can be prevented.

[0052] Since the circuit corrosion is most serious in the area where the COF and the display panel are bound, the signal line can be a signal line bound and connected to the COF.

[0053] In some embodiments, the display module further includes:

[0054] a first conductive pattern connected to the signal line and arranged in a different layer from the signal line, the first conductive pattern being connected to the negative electrode of the power module; and / or

[0055] A second conductive pattern connected to the signal line and arranged in a different layer from the signal line, wherein the second conductive pattern is connected to the positive electrode of the power module.

[0056] In this embodiment, the signal line and the negative electrode of the power module can be connected through the first conductive pattern, and / or the signal line and the positive electrode of the power module can be connected through the second conductive pattern. Since the position where the signal line is located is prone to water vapor intrusion, the first conductive pattern is preferably set in a different layer from the signal line, so that even if water vapor intrusion occurs at the position where the signal line is located, the first conductive pattern can also be unaffected by the water vapor, thereby ensuring the connection reliability between the signal line and the negative electrode of the power module; the second conductive pattern is preferably set in a different layer from the signal line, so that even if water vapor intrusion occurs at the position where the signal line is located, the second conductive pattern can also be unaffected by the water vapor, thereby ensuring the connection reliability between the signal line and the positive electrode of the power module.

[0057] In order to reduce the influence of water vapor intrusion on the first conductive pattern at the location of the signal line, the first orthographic projection of the first conductive pattern on the base substrate of the display panel does not overlap with the second orthographic projection of the signal line on the base substrate.

[0058] In some embodiments, the shortest distance between the first orthographic projection and the second orthographic projection may be greater than 2um. In this way, even if water vapor intrusion occurs at the location where the signal line is located, the first conductive pattern will not be affected by the water vapor due to the relatively far distance between the first conductive pattern and the signal line, thereby ensuring the connection reliability between the signal line and the negative pole of the power module.

[0059] In order to reduce the influence of water vapor intrusion on the second conductive pattern at the location of the signal line, the third orthographic projection of the second conductive pattern on the base substrate of the display panel does not overlap with the second orthographic projection of the signal line on the base substrate.

[0060] In some embodiments, the shortest distance between the third orthographic projection and the second orthographic projection may be greater than 2um. In this way, even if water vapor intrusion occurs at the location of the signal line, the second conductive pattern will not be affected by the water vapor due to the relatively far distance between the second conductive pattern and the signal line, thereby ensuring the connection reliability between the signal line and the positive pole of the power module.

[0061] In order to reduce the number of patterning processes for manufacturing the display panel, the first conductive pattern can be provided in the same layer and material as the original film layer of the display panel. In some embodiments, the first conductive pattern and the source / drain metal layer of the display panel can be provided in the same layer and material.

[0062] In order to reduce the number of patterning processes for manufacturing the display panel, the second conductive pattern can be arranged in the same layer and material as the original film layer of the display panel. In some embodiments, the second conductive pattern is arranged in the same layer and material as the source / drain metal layer of the display panel.

[0063] In order to reduce the risk of the first conductive pattern being corroded, the first conductive pattern may be made of an inert metal that can replace the hydrogen element in the hydride, including copper, mercury, silver, platinum, gold, and the like.

[0064] In order to reduce the risk of corrosion of the second conductive pattern, the second conductive pattern may be made of an inert metal that can replace the hydrogen element in the hydride, including copper, mercury, silver, platinum, gold, etc.

[0065] The first conductive pattern can be directly connected to the signal line, for example, there is an insulating layer between the first conductive pattern and the signal line, and the first conductive pattern can be connected to the signal line through a via hole penetrating the insulating layer; or the first conductive pattern can also be connected to the signal line through the first connecting pattern. The second conductive pattern can be directly connected to the signal line, for example, there is an insulating layer between the second conductive pattern and the signal line, and the second conductive pattern can be connected to the signal line through a via hole penetrating the insulating layer; or the second conductive pattern can also be connected to the signal line through the first connecting pattern.

[0066] In some embodiments, the display module further includes:

[0067] A first connection pattern, having a first insulating layer between it and the signal line, and having a second insulating layer between it and the first conductive pattern, wherein the first connection pattern is connected to the signal line via a via hole penetrating the first insulating layer, and the first connection pattern is connected to the first conductive pattern via a via hole penetrating the second insulating layer; and / or

[0068] The second connecting pattern is separated from the signal line by a third insulating layer and separated from the second conductive pattern by a fourth insulating layer. The second connecting pattern is connected to the signal line through a via hole penetrating the third insulating layer, and the second connecting pattern is connected to the second conductive pattern through a via hole penetrating the fourth insulating layer.

[0069] In order to reduce the number of composition processes for manufacturing the display panel, the first connection pattern can be set in the same layer and material as the original film layer of the display panel, such as being set in the same layer and material as the anode of the display panel; in order to reduce the number of composition processes for manufacturing the display panel, the second connection pattern can be set in the same layer and material as the original film layer of the display panel, such as being set in the same layer and material as the anode of the display panel.

[0070] In a specific embodiment, Figure 1As shown, the signal line 01 is connected to the first conductive pattern 03 through the first connecting pattern 04, and the signal line 01 is connected to the second conductive pattern 02 through the second connecting pattern 05; Figure 2 As shown, the display panel 06 is bound to the driving chip 08 on the flip chip 07, the potential monitoring module 10 is connected to the signal line 01, and can monitor the potential on the signal line 01; the power supply module 09 can provide an electrical signal, the negative electrode is connected to the first conductive pattern 03, and the positive electrode is connected to the second conductive pattern 02.

[0071] The potential monitoring module 10 can determine whether the display panel is displaying by monitoring the potential on the signal line 01. When the display panel is displaying, the signal line 01 cannot be electronically compensated, otherwise a short circuit will occur.

[0072] There may be a switch Switch in the potential monitoring module, and the opening and closing of the Switch depends on whether the signal line is in a working state. It is assumed that the signal line does not work when there is no level, and works when there is a level. If the signal line is without a level, the Switch is closed, and the impressed current electrode protection system is in a working state. If there is a level on the signal line, the Switch is disconnected, the potential monitoring module cannot monitor the potential state of the signal line, and the impressed current electrode protection system does not work.

[0073] When the display panel is not displaying, when water vapor invades the display panel, the non-working signal line 01 will produce electrochemical corrosion, that is, M-ne - =M +n , where M represents the metal used by the signal line 01, and the signal line 01 loses electrons, causing the potential to rise;

[0074] like Figure 3 As shown, after the potential monitoring module 10 detects that the potential of the signal line 01 rises, it will feed back an enable signal to the power supply module 09;

[0075] After receiving the enable signal, the power module 09 starts to work normally and provides electrons for the signal line 01;

[0076] The signal line 01 connected to the negative pole of the power module 09 will receive electrons, M-ne - =M +n The process will be suppressed and the potential of signal line 01 will decrease;

[0077] When the potential of the signal line 01 drops to a preset value, the potential monitoring module 10 feeds back a disenable signal to the power module 09 , and the power module 09 stops working.

[0078] The potential monitoring module 10 and the power supply module 09 may be built into the driving chip 08 .

[0079] This embodiment forms an impressed current electrode protection system by combining the display panel and the driver chip 08, so that the protected signal line is always in a state of potential balance, thereby achieving an anti-corrosion effect and solving the problem of poor waterproof glue effect in the binding area between COF and the display panel. At the same time, there is no need to maintain the structure of the display panel.

[0080] In addition, if too much water vapor enters and gathers into water in the display panel, since water is an electrolyte, the first connection pattern and the second connection pattern can be removed, and water can be used as a medium to transmit current, which can also constitute an external current electrode protection circuit.

[0081] An embodiment of the present invention further provides a display device, comprising the display module as described above.

[0082] The display device includes but is not limited to: a radio frequency unit, a network module, an audio output unit, an input unit, a sensor, a display unit, a user input unit, an interface unit, a memory, a processor, and a power supply. Those skilled in the art will appreciate that the structure of the above-mentioned display device does not constitute a limitation on the display device, and the display device may include more or less of the above-mentioned components, or a combination of certain components, or different component arrangements. In an embodiment of the present invention, the display device includes but is not limited to a display, a mobile phone, a tablet computer, a television, a wearable electronic device, a navigation display device, and the like.

[0083] The display device may be any product or component with a display function, such as a television, a monitor, a digital photo frame, a mobile phone, a tablet computer, etc., wherein the display device further includes a flexible circuit board, a printed circuit board and a backplane.

[0084] An embodiment of the present invention further provides a working method of a display device, which is applied to the display device as described above, and the working method includes:

[0085] A potential monitoring module is used to monitor the potential of the signal line. When the potential of the signal line is greater than a preset value, the negative pole of the power module is controlled to be connected to the signal line; when the potential of the signal line is less than or equal to the preset value, the negative pole of the power module is controlled to be disconnected from the signal line.

[0086] In the present embodiment, after water vapor invades the display panel, it will cause corrosion of the signal line. When the signal line corrodes, it will lose electrons and the potential will rise. When the potential of the signal line is monitored to be greater than a preset value, the present embodiment determines that the signal line has corroded, controls the negative pole of the power module to be connected to the signal line, replenishes electrons into the signal line, and prevents corrosion from occurring, thereby avoiding display abnormalities and poor reliability caused by corrosion of the display panel circuit.

[0087] In a specific embodiment, Figure 1As shown, the signal line 01 is connected to the first conductive pattern 03 through the first connecting pattern 04, and the signal line 01 is connected to the second conductive pattern 02 through the second connecting pattern 05; Figure 2 As shown, the display panel 06 is bound to the driving chip 08 on the flip chip 07, the potential monitoring module 10 is connected to the signal line 01, and can monitor the potential on the signal line 01; the power supply module 09 can provide an electrical signal, the negative electrode is connected to the first conductive pattern 03, and the positive electrode is connected to the second conductive pattern 02.

[0088] The potential monitoring module 10 can determine whether the display panel is displaying by monitoring the potential on the signal line 01. When the display panel is displaying, the signal line 01 cannot be electronically compensated, otherwise a short circuit will occur.

[0089] There may be a switch Switch in the potential monitoring module, and the opening and closing of the Switch depends on whether the signal line is in a working state. It is assumed that the signal line does not work when there is no level, and works when there is a level. If the signal line is without a level, the Switch is closed, and the impressed current electrode protection system is in a working state. If there is a level on the signal line, the Switch is disconnected, the potential monitoring module cannot monitor the potential state of the signal line, and the impressed current electrode protection system does not work.

[0090] When the display panel is not displaying, when water vapor invades the display panel, the non-working signal line 01 will produce electrochemical corrosion, that is, M-ne - =M +n , where M represents the metal used by the signal line 01, and the signal line 01 loses electrons, causing the potential to rise;

[0091] like Figure 3 As shown, after the potential monitoring module 10 detects that the potential of the signal line 01 rises, it will feed back the enable signal to the power supply module 09;

[0092] After receiving the enable signal, the power module 09 starts to work normally and provides electrons for the signal line 01;

[0093] The signal line 01 connected to the negative pole of the power module 09 will receive electrons, M-ne - =M +n The process will be suppressed and the potential of signal line 01 will decrease;

[0094] When the potential of the signal line 01 drops to a preset value, the potential monitoring module 10 feeds back a disable signal to the power module 09, and the power module 09 stops working.

[0095] The potential monitoring module 10 and the power supply module 09 may be built into the driving chip 08 .

[0096] This embodiment forms an impressed current electrode protection system by combining the display panel and the driver chip 08, so that the protected signal line is always in a state of potential balance, thereby achieving an anti-corrosion effect and solving the problem of poor waterproof glue effect in the binding area between COF and the display panel. At the same time, there is no need to maintain the structure of the display panel.

[0097] It should be noted that each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the embodiments, since they are basically similar to the product embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the product embodiments.

[0098] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0099] It will be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” or “under” another element, it can be “directly on” or “under” the other element or intervening elements may be present.

[0100] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0101] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A display module, characterized in that: include: A display panel, the display panel comprising a signal line; A power module, used for providing an electrical signal; A potential monitoring module, used for monitoring the potential of the signal line when the display module is not displaying, and controlling the negative electrode of the power module to be connected to the signal line when the potential of the signal line is greater than a preset value; and controlling the negative electrode of the power module to be disconnected from the signal line when the potential of the signal line is less than or equal to a preset value; a first conductive pattern connected to the signal line and arranged in a different layer from the signal line; and / or a second conductive pattern connected to the signal line and arranged in a different layer from the signal line, the second conductive pattern being connected to the positive electrode of the power module; Among them, the first conductive pattern is connected to the negative pole of the power module, and after receiving the enable signal of the potential monitoring module, the power module outputs the electrical signal to the signal line through the first conductive pattern; after receiving the disable signal of the potential monitoring module, the power module stops outputting the electrical signal to the signal line.

2. The display module according to claim 1, characterized in that: Also includes: A first connection pattern, having a first insulating layer between it and the signal line, and having a second insulating layer between it and the first conductive pattern, wherein the first connection pattern is connected to the signal line via a via hole penetrating the first insulating layer, and the first connection pattern is connected to the first conductive pattern via a via hole penetrating the second insulating layer; and / or The second connecting pattern is separated from the signal line by a third insulating layer and separated from the second conductive pattern by a fourth insulating layer. The second connecting pattern is connected to the signal line through a via hole penetrating the third insulating layer, and the second connecting pattern is connected to the second conductive pattern through a via hole penetrating the fourth insulating layer.

3. The display module according to claim 1, characterized in that: A first orthographic projection of the first conductive pattern on the base substrate of the display panel does not overlap with a second orthographic projection of the signal line on the base substrate; A third orthographic projection of the second conductive pattern on the base substrate of the display panel does not overlap with a second orthographic projection of the signal line on the base substrate.

4. The display module according to claim 3, characterized in that: The shortest distance between the first orthographic projection and the second orthographic projection is greater than 2um; The shortest distance between the third orthographic projection and the second orthographic projection is greater than 2 um.

5. The display module according to claim 1, characterized in that: The signal line is connected to the driving chip, and the first conductive pattern and the source / drain metal layer of the display panel are provided in the same layer and with the same material; and / or The second conductive pattern is provided in the same layer and with the same material as the source / drain metal layer of the display panel.

6. The display module according to claim 1, characterized in that: The first conductive pattern is made of an inert metal; and / or The second conductive pattern is made of inert metal.

7. A display device, characterized in that: Comprising the display module as described in any one of claims 1-6.

8. A method for operating a display device, characterized in that: Applied to the display device as claimed in claim 7, the working method comprises: When the display device is not displaying, the potential of the signal line is monitored by a potential monitoring module. When the potential of the signal line is greater than a preset value, the negative pole of the power module is controlled to be connected to the signal line; when the potential of the signal line is less than or equal to a preset value, the negative pole of the power module is controlled to be disconnected from the signal line.

9. The operating method of the display device according to claim 8, characterized in that: The method specifically comprises: The potential monitoring module monitors the potential of the signal line, and sends an enable signal to the power module when the potential of the signal line is greater than a preset value; and sends a disable signal to the power module when the potential of the signal line is less than or equal to the preset value; The power module outputs an electrical signal to the signal line after receiving an enable signal; and stops outputting the electrical signal to the signal line after receiving a disable signal.

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