Driving circuit of display panel, array substrate and display panel

Abstract

The invention discloses a driving circuit of a display panel, an array substrate and the display panel, and belongs to the technical field of display. The driving circuit of the display panel comprises a gate driving unit; the electromagnetic coil winds the grid driving unit according to a preset direction; the driving chip is connected with the electromagnetic coil; the temperature detection unit is used for detecting the current temperature of the gate driving unit and outputting a temperature detection signal; and the control unit is respectively connected with the temperature detection unit and the driving chip, and the control unit is used for controlling the driving chip to supply power to the electromagnetic coil according to the temperature detection signal, so that the temperature of the gate driving unit is increased. The grid driving unit is heated through the electromagnetic eddy current effect, compared with a traditional electric heating wire heating scheme, the grid driving unit is more efficient and energy-saving, the low-temperature characteristic of the grid driving unit can be effectively improved, and the phenomenon that low-temperature cross grains are drawn differently on the display panel adopting the grid driving unit is prevented.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of display technologies, and particularly to a driving circuit of a display panel, an array substrate, and a display panel. Background Art

[0002] In recent years, the developed gate driving technology has successfully realized the embedded design of the gate driving circuit by directly integrating the shift register circuit composed of TFTs (Thin Film Transistors) on a glass substrate. However, the above gate driving technology still has technical bottlenecks to be solved in practical applications. For example, in a low-temperature environment (such as operating conditions at -20°C and below), the signal transmission and driving capabilities of the gate driving circuit will be affected.

[0003] Currently, the traditional solution in related technologies is to use a heating wire to heat the gate driving circuit to improve its low-temperature characteristics. However, this may cause thermal damage to non-metallic materials (such as the glass substrate) around the gate driving circuit, and the heating wire heating requires a long preheating time, and its heating speed is also limited by the heat conduction efficiency. Summary of the Invention

[0004] The main purpose of the embodiments of the present application is to provide a driving circuit of a display panel, an array substrate, and a display panel, aiming to solve the technical problem of how to improve the low-temperature driving characteristics of the gate driving circuit.

[0005] To achieve the above purpose, an embodiment of the present application provides a driving circuit of a display panel, and the driving circuit of the display panel includes:

[0006] A gate driving unit;

[0007] An electromagnetic coil, which is wound around the gate driving unit according to a preset direction;

[0008] A driving chip, which is connected to the electromagnetic coil;

[0009] A temperature detection unit, which is used to detect the current temperature of the gate driving unit and output a temperature detection signal;

[0010] A control unit, which is respectively connected to the temperature detection unit and the driving chip, and the control unit is used to control the driving chip to supply power to the electromagnetic coil according to the temperature detection signal, so as to raise the temperature of the gate driving unit.

[0011] In an embodiment, the temperature detection unit includes:

[0012] A temperature sensor, the first end of the temperature sensor is connected to a power supply, and the second end of the temperature sensor is grounded;

[0013] An operational amplifier, wherein a first input terminal of the operational amplifier is connected to a third terminal of the temperature sensor, a second input terminal of the operational amplifier is connected to a fourth terminal of the temperature sensor, and an output terminal of the operational amplifier is connected to the control unit.

[0014] In one embodiment, the temperature sensor includes: a first resistor, a second resistor, a third resistor, and a fourth resistor, and one of the first resistor, the second resistor, the third resistor, and the fourth resistor is a thermistor;

[0015] A first end of the first resistor and a first end of the third resistor are commonly connected as a first end of the temperature sensor;

[0016] A first end of the second resistor and a first end of the fourth resistor are commonly connected as a second end of the temperature sensor;

[0017] A second end of the first resistor and a second end of the second resistor are commonly connected as a third end of the temperature sensor;

[0018] A second end of the third resistor and a second end of the fourth resistor are commonly connected as a fourth end of the temperature sensor.

[0019] In one embodiment, the control chip controls the driving chip to supply power to the electromagnetic coil during the blank time between frame refreshes.

[0020] In one embodiment, the driving circuit of the display panel further includes:

[0021] A shielding layer, and the shielding layer is disposed between the gate driving unit and the electromagnetic coil.

[0022] In one embodiment, the electromagnetic coil is disposed around the shielding layer.

[0023] In one embodiment, the electromagnetic coil is disposed on one side of the shielding layer and winds around a conductive medium in the gate driving unit.

[0024] In one embodiment, the control unit is configured to control the driving chip to supply power to the electromagnetic coil when the current temperature of the gate driving unit is less than a preset temperature threshold, so as to increase the temperature of the gate driving unit.

[0025] In addition, to achieve the above object, an embodiment of the present application further provides an array substrate, the array substrate includes an effective display area and a non-effective display area, the non-effective display area surrounds the periphery of the effective display area, and the driving circuit of the display panel as described above is disposed in the non-effective display area of the array substrate.

[0026] In addition, to achieve the above object, an embodiment of the present application further provides a display panel, the display panel includes: a color filter substrate, a liquid crystal layer, and the array substrate as described above, and the liquid crystal layer is disposed between the array substrate and the color filter substrate.

[0027] An embodiment of the present application provides a driving circuit, an array substrate, and a display panel of a display panel. The driving circuit of the display panel includes: a gate driving unit; an electromagnetic coil wound around the gate driving unit according to a preset direction; a driving chip connected to the electromagnetic coil; a temperature detection unit for detecting the current temperature of the gate driving unit and outputting a temperature detection signal; and a control unit respectively connected to the temperature detection unit and the driving chip, and the control unit is configured to control the driving chip to supply power to the electromagnetic coil according to the temperature detection signal so as to heat up the gate driving unit. In the embodiment of the present application, the eddy current effect generated by the electromagnetic coil is used to heat the gate driving unit in a low-temperature environment, effectively improving its performance, while reducing power consumption and device complexity. Compared with the traditional electric heating wire heating method in the related art, it has the advantages of high efficiency and energy saving, faster heating speed, and more accurate temperature control, and can more effectively improve the problem of gate driving failure caused by low temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only a part of the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a schematic structural diagram of a driving circuit of a display panel provided by an embodiment of the present application;

[0030] Figure 2 It is a schematic diagram of the planar structure of a display panel related to the driving circuit of a display panel provided by an embodiment of the present application;

[0031] Figure 3 It is a schematic diagram of the distribution of electromagnetic coils related to the driving circuit of a display panel provided by an embodiment of the present application;

[0032] Figure 4 It is a schematic diagram of the electromagnetic eddy current heating principle related to the driving circuit of a display panel provided by an embodiment of the present application;

[0033] Figure 5 It is a schematic diagram of the distribution of the driving chip and the temperature detection unit related to the driving circuit of a display panel provided by an embodiment of the present application;

[0034] Figure 6 Schematic diagram of the structure of the temperature detection unit involved in the driving circuit of a display panel provided by an embodiment of the present application;

[0035] Figure 7 Schematic diagram of the structure of the temperature sensor involved in the driving circuit of a display panel provided by an embodiment of the present application;

[0036] Figure 8 Schematic diagram for comparing the flow directions of the gate driving working current and the electromagnetic eddy current involved in the driving circuit of a display panel provided by an embodiment of the present application;

[0037] Figure 9 Schematic diagram of the gate driving operation and heating timing involved in the driving circuit of a display panel provided by an embodiment of the present application;

[0038] Figure 10 Schematic diagram of the structure of the driving circuit of a display panel provided by an embodiment of the present application after adding a shielding layer;

[0039] Figure 11 Schematic diagram of the distribution structure of the electromagnetic coils after adding a shielding layer to the driving circuit of a display panel provided by an embodiment of the present application;

[0040] Figure 12 Schematic diagram of the distribution structure of the temperature detection unit involved in the driving circuit of a display panel provided by an embodiment of the present application;

[0041] Figure 13 Schematic diagram of the structure of an array substrate provided by an embodiment of the present application;

[0042] Figure 14 Schematic diagram of the structure of a display panel provided by an embodiment of the present application.

[0043] Explanation of the reference numerals in the drawings:

[0044] 10. Gate driving unit; 20. Electromagnetic coil; 30. Driving chip; 40. Temperature detection unit; 50. Control unit; 401. Temperature sensor; 402. Operational amplifier; R1. First resistor; R2. Second resistor; R3. Third resistor; R4. Fourth resistor; 101. Effective display area; 102. Driving circuit of the display panel; 100. Array substrate; 200. Color filter substrate; 300. Liquid crystal layer. Detailed implementation manners

[0045] In the following description, specific details such as specific system architectures and technologies are presented for the purpose of illustration rather than limitation, in order to provide a thorough understanding of the embodiments of the present application. However, those skilled in the art should understand that the embodiments of the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from hindering the description of the embodiments of the present application.

[0046] In the gate drive circuit of a traditional LCD (Liquid Crystal Display) panel, an external drive chip (Gate IC) is usually connected to the glass substrate through a chip-on-film (COF) bonding process. This architecture has inherent defects such as complex peripheral circuits, limited bezel size, and high production costs. In recent years, the developed gate drive technology has successfully achieved an embedded design of the gate drive circuit by directly integrating the shift register circuit composed of TFTs (Thin Film Transistors) on the glass substrate. This technical solution has significant advantages compared to the traditional structure: First, it eliminates the Gate IC chip and the COF bonding process, effectively reducing the material cost and process complexity; Second, it improves the panel space utilization rate through circuit integration design, providing a technical basis for the development of narrow bezel and full-screen products.

[0047] However, the above-mentioned gate drive technology still has technical bottlenecks that need to be solved urgently in practical applications. Due to low-temperature environments (such as operating conditions at -20°C and below), the carrier mobility of amorphous silicon (a-Si) TFTs decays exponentially, resulting in a significant decrease in the switching response rate of the transistors in the shift register unit, causing problems such as signal transmission delay and deterioration of driving ability. At the same time, the decrease in temperature causes a positive drift in the TFT threshold voltage (Vth), resulting in the inability of the transistors to fully turn on or off under the preset driving timing, causing abnormal phenomena such as waveform distortion and timing misalignment in the gate drive circuit, severely restricting the working reliability of the display device in low-temperature environments. Therefore, how to optimize the design of the gate drive circuit to improve its low-temperature driving characteristics has become a key technical problem that needs to be broken through in this field.

[0048] Currently, the traditional solution in related technologies is to use a heating wire to heat the gate drive circuit to improve its low-temperature characteristics, but this may cause thermal damage to the non-metallic materials (such as the glass substrate) around the gate drive circuit, and the heating wire heating requires a long time for preheating, and its heating speed is also limited by the heat conduction efficiency.

[0049] Based on this, the embodiments of the present application provide a driving circuit for a display panel, an array substrate, and a display panel. By using the eddy current effect generated by an electromagnetic coil to heat the gate driving unit in a low-temperature environment, the performance is effectively improved, while the power consumption and device complexity are reduced. Compared with the traditional electric heating wire heating method in the related art, it has the advantages of high efficiency and energy saving, faster heating speed, and more precise temperature control, and can more effectively improve the problem of gate driving failure caused by low temperature.

[0050] The driving circuit for a display panel, the array substrate, and the display panel provided by the embodiments of the present application will be specifically described through the following embodiments. First, the driving circuit for a display panel in the embodiments of the present application will be described.

[0051] The embodiments of the present application provide a driving circuit for a display panel. Referring to Figure 1 , Figure 1 FIG. is a schematic structural diagram of a driving circuit for a display panel provided by an embodiment of the present application. In this embodiment, the driving circuit for a display panel includes:

[0052] A gate driving unit 10;

[0053] An electromagnetic coil 20, and the electromagnetic coil 20 is wound around the gate driving unit 10 according to a preset direction;

[0054] A driving chip 30, and the driving chip 30 is connected to the electromagnetic coil 20;

[0055] A temperature detection unit 40, and the temperature detection unit 40 is used to detect the current temperature of the gate driving unit 10 and output a temperature detection signal;

[0056] A control unit 50, the control unit 50 is respectively connected to the temperature detection unit 40 and the driving chip 30, and the control unit 50 is used to control the driving chip 30 to supply power to the electromagnetic coil 20 according to the temperature detection signal, so as to raise the temperature of the gate driving unit 10.

[0057] In this embodiment, the driving circuit for a display panel is an important part indispensable in the display panel. Now, the driving circuit for a display panel will be explained in combination with the planar architecture of the display panel. As Figure 2 shown, the gate driving unit 10 is mainly distributed on both sides of the screen AA area (display area) of the display panel (in this embodiment, it is temporarily described by taking the gate driving unit 10 being arranged on both sides of the panel as an example. The display panel with the gate driving unit 10 arranged on only one side is also applicable, that is, single-sided driving, double-sided simultaneous driving, and double-sided alternating driving are all applicable, and this embodiment does not limit this). When the display panel is working normally, the Gate IC is sequentially turned on row by row, and signals are transmitted to each pixel through the SourceIC, so as to display different pictures.

[0058] In this embodiment, since the gate driving regions are on both sides of the AA region, the electromagnetic coil 20 can be wound around the gate driving regions on both sides in the manner shown by Figure 3 . Since the transmission lines in the gate driving unit 10 are all metal conductors (such as copper wires), when the electromagnetic coil 20 is energized, eddy currents can be generated inside the transmission lines of the gate driving through the electromagnetic eddy current effect, thereby achieving rapid heating of the gate driving unit 10. Specifically, as shown by Figure 4 , the electromagnetic eddy current heating technology is an efficient heating method based on the principle of electromagnetic induction. Its core principle is that when a conductor (such as metal) is in an alternating magnetic field, the magnetic field will induce eddy currents (i.e., circular currents) inside the conductor, and these eddy currents generate Joule heat inside the conductor, thereby increasing the temperature of the conductor.

[0059] In this embodiment, as shown by Figure 5 , the driving chip 30 can be arranged in the PCBA (circuit drive), and the temperature detection unit 40 is arranged close to the gate driving unit 10, so as to timely obtain the temperature change of the gate driving unit 10. Figure 5 An example of winding the gate driving circuit by the electromagnetic coil 20 in a certain direction is also provided. The material of the electromagnetic coil 20 can be selected as copper wire for winding, and its shape and size can be designed to match the actual panel size of each model and the circuit structure of the gate driving unit 10 to ensure that the magnetic field evenly covers the heating area. When the temperature detection unit 40 detects that the temperature of the gate driving unit 10 is too low, the driving chip 30 will provide high-frequency alternating current (the frequency range is approximately 20 - 100 kHz, used to drive the electromagnetic coil 20) for the electromagnetic coil 20 wound around the gate driving unit 10. The magnetic field will induce eddy currents in the copper wire inside the gate driving unit 10, and the eddy currents generate Joule heat inside the copper wire, increasing the temperature of the copper wire, thereby improving the problem of insufficient driving ability of the gate driving unit 10 caused by too low temperature. As an example, the heating power can be estimated by the formula . Wherein, B is the magnetic induction intensity, f is the magnetic field frequency, d is the conductor thickness, and ρ is the conductor resistivity. The higher the magnetic field frequency, the more obvious the skin effect of eddy current heating, and the more concentrated the heat on the conductor surface. Since the heat is concentrated on the metal part of the gate driving unit 10, thermal damage to non-metal materials such as glass substrates is avoided. In this way, even when the display panel operates in a low-temperature environment, the gate driving unit 10 can return to the normal working temperature in a short time.

[0060] In this embodiment, the control unit 50 can be implemented in software or hardware. Taking the hardware method as an example, the control unit 50 can also be arranged in Figure 5In the PCBA board, it is respectively connected to the temperature detection unit 40 and the drive chip 30. The control unit 50 can determine the working state of the drive chip 30. When the drive chip 30 receives an instruction from the control unit 50, it will provide an alternating voltage for the electromagnetic coil 20, causing the temperature of the gate drive unit 10 to rise. Specifically, the control unit 50 controls the drive chip 30 based on the temperature detection signal output by the temperature detection unit 40 through detecting the temperature change of the gate drive unit 10.

[0061] As an example, the temperature detection unit 40 detects the current temperature state of the gate drive unit 10. When the preset temperature threshold is not met (for example, the temperature threshold can be set to 0 °C, and specifically, it can also be determined by the low-temperature characteristics of the actual display panel. This embodiment does not limit this), the drive chip 30 does not receive an instruction from the control unit 50, and there is no eddy current heating in the gate drive unit 10, and the temperature remains unchanged; when it is less than or equal to the preset temperature threshold, the drive chip 30 provides an alternating voltage for the electromagnetic coil 20. Under eddy current heating, the temperature of the gate drive unit 10 rises, maintaining the driving ability.

[0062] Refer to Figure 6 , in some feasible embodiments, the temperature detection unit 40 may include:

[0063] A temperature sensor 401, the first end of the temperature sensor 401 is connected to the power supply, and the second end of the temperature sensor 401 is grounded;

[0064] An operational amplifier 402, the first input terminal of the operational amplifier 402 is connected to the third end of the temperature sensor 401, the second input terminal of the operational amplifier 402 is connected to the fourth end of the temperature sensor 401, and the output terminal of the operational amplifier 402 is connected to the control unit 50.

[0065] In this embodiment, a specific implementation manner of the temperature detection unit 40 is provided, that is, through the combination of the temperature sensor 401 and the operational amplifier 402, the temperature detection of the gate drive unit 10 is realized, and thus the temperature detection signal is output.

[0066] Refer to Figure 7 , in some feasible embodiments, the temperature sensor 401 may include: a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4. One of the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 is a thermistor;

[0067] The first end of the first resistor R1 and the first end of the third resistor R3 are commonly connected as the first end of the temperature sensor 401;

[0068] The first end of the second resistor R2 and the first end of the fourth resistor R4 are commonly connected as the second end of the temperature sensor 401;

[0069] The second terminal of the first resistor R1 and the second terminal of the second resistor R2 are commonly connected as the third terminal of the temperature sensor 401;

[0070] The second terminal of the third resistor R3 and the second terminal of the fourth resistor R4 are commonly connected as the fourth terminal of the temperature sensor 401.

[0071] In this embodiment, the temperature sensor 401 can be implemented by means of a bridge circuit. The bridge circuit consists of four resistors, one of which is a thermistor and the other three are fixed-value resistors. The specific setting position of the thermistor is not limited in this embodiment and can be determined according to the actual design of the display panel. Therefore, any one of the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 can be the thermistor. When the temperature of the gate driving unit 10 changes, the resistance value of the thermistor will change accordingly. According to Ampere's law, the current will change after the resistance value changes, resulting in a change in the voltage between the third terminal of the temperature sensor 401 and the fourth terminal of the temperature sensor 401. After passing through the operational amplifier 402, it is then transmitted to the control unit 50, and further the output of the temperature detection signal.

[0072] In some feasible embodiments, the control chip controls the driving chip 30 to supply power to the electromagnetic coil 20 during the blank time between frame refreshes.

[0073] In this embodiment, the working timing of the control chip relative to the gate driving unit 10 is further described. As Figure 8 shown, the normal working current of the gate driving unit 10 is controlled by a common driving signal, and its direction and magnitude depend on the specific circuit design and driving logic. Usually, the working current of the gate driving unit 10 is a low-frequency or DC signal for controlling the on / off state of the TFT. The eddy current is a circular current induced in the metal part (the copper wire described above) of the gate driving unit 10 by a high-frequency alternating magnetic field. The direction of the eddy current is perpendicular to the direction of the alternating magnetic field, and its frequency is the same as the magnetic field frequency (usually 20 - 100 kHz).

[0074] Although the operating current of the gate driving unit 10 and the eddy current have different natures (one is low-frequency or direct current, and the other is high-frequency alternating current), their directions and paths usually do not directly conflict. Eddy currents are mainly concentrated on the surface of metal conductors (skin effect), while the operating current of the gate driving unit 10 flows along the designed circuit path. However, there are still some problems. For example, high-frequency eddy currents may interfere with the low-frequency operating signals of the gate driving unit 10, or some energy may be consumed by the eddy currents, affecting the normal operation of the gate driving unit 10. Therefore, this embodiment provides a solution relying on timing adjustment to avoid conflicts between electromagnetic eddy current heating and the operation of the gate driving unit 10. As Figure 9 shown, during the operation of the display panel, there is a gap in the operation of the gate driving unit 10 for a period of time (i.e., the Blanking time between frame refreshes). Using this blank time for electromagnetic eddy current heating can not only avoid conflicts between electromagnetic eddy current heating and the operation of the gate driving unit 10, but also achieve heating of the gate driving unit 10.

[0075] In some feasible embodiments, the driving circuit of the display panel may further include:

[0076] A shielding layer, which is arranged between the gate driving unit 10 and the electromagnetic coil 20.

[0077] Although the foregoing embodiments can make the normal operating time of the gate driving unit 10 not conflict with the electromagnetic eddy current induction operating time, there may still be a problem of electromagnetic interference of the high-frequency alternating magnetic field on the signal lines in the gate driving unit 10 at the junction of the two operating time periods, resulting in signal distortion or misoperation. For this reason, in this embodiment, the electromagnetic interference (EMI) is further improved, that is, a shielding layer is provided between the gate driving unit 10 and the electromagnetic coil 20. As Figure 10 shown, when the actual panel design conditions permit, shielding materials (such as copper foil or ferrite materials) can be added around the key signal lines of the gate driving unit 10 to reduce magnetic field interference. In this way, not only can the signal distortion phenomenon be reduced, but also the electromagnetic coil 20 and the signal lines of the gate driving unit 10 can be kept as far away as possible to reduce the coupling effect.

[0078] As an example, when the shielding layer is added, the electromagnetic coil 20 can be arranged in a manner of surrounding the shielding layer as Figure 10 shown.

[0079] As an example, the electromagnetic coil 20 can also be arranged as Figure 11 shown, only on one side of the shielding layer (such as the back or side of the screen), Figure 11As shown (it can be the back), and it winds around the conductor medium in the gate driving unit 10, indirectly heating the conductor medium in the gate driving unit 10 through a magnetic field. This not only facilitates installation and maintenance but also reduces the impact of electromagnetic interference on the signal lines of the gate driving unit 10. However, the heating efficiency is not as high as the surrounding setting method and is suitable for situations where it is not in an ultra-low temperature (such as below -20°C) for a long time.

[0080] It can be understood that in practical applications, the setting method of the electromagnetic coil 20 can be determined by the actual design of the display panel, and this embodiment does not limit this.

[0081] In some feasible embodiments, the number of the temperature detection units 40 is determined according to the size of the gate driving unit 10.

[0082] In this embodiment, the temperature detection unit 40 can be set in the way as Figure 5 or Figure 12 shown, that is, for a small-sized panel, one corresponding temperature detection unit 40 can be set for each gate driving unit 10. While in a larger-sized panel, due to the longer line of the gate driving unit 10 resulting in a temperature difference inside the gate driving area, multiple temperature detection units 40 (such as the sensors 1 to 6 shown in Figure 12 ) can be distributed. By comprehensively calculating the average value of the temperatures of each part, the temperature detection method can be optimized to make the control more accurate.

[0083] The embodiment of the present application provides a driving circuit for a display panel, which heats the gate driving unit by using the eddy current effect generated by an electromagnetic coil in a low-temperature environment, effectively improving its performance, while reducing power consumption and device complexity. Compared with the traditional electric heating wire heating method in the related art, it has the advantages of high efficiency and energy saving, faster heating speed, and more accurate temperature control, and can more effectively improve the problem of gate driving failure caused by low temperature.

[0084] In addition, the embodiment of the present application also provides an array substrate. Referring to Figure 13 , in this embodiment, the array substrate includes an effective display area 101 and a non-effective display area. The non-effective display area surrounds the periphery of the effective display area 101, and the above-mentioned driving circuit 102 of the display panel is arranged in the non-effective display area of the array substrate.

[0085] The specific structure of the driving circuit 102 of the display panel in this embodiment refers to the above embodiment. Since the array substrate provided in this embodiment adopts all the technical solutions of the above all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0086] In addition, the embodiment of the present application also provides a display panel. Referring toFigure 14 The display panel includes an array substrate 100, a color filter substrate 200, and a liquid crystal layer 300, and the liquid crystal layer 300 is disposed between the array substrate 100 and the color filter substrate 200.

[0087] As an example, the display panel in this embodiment may be a TN (Twisted Nematic) display panel, an IPS (In-Plane Switching) display panel, a VA (Vertical Alignment) display panel, an MVA (Multi-Domain Vertical Alignment) display panel. Of course, it may also be other types of display panels, such as an OLED (Organic Light-Emitting Diode) display panel.

[0088] As an example, the display panel may be applied to a display device, and the display device may be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, etc.

[0089] Those skilled in the art can understand that Figure 14 the structure shown in does not constitute a limitation on the display device, and it may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0090] In this embodiment, the specific structure of the array substrate 100 refers to the above embodiment. Since the display panel proposed in this embodiment adopts all the technical solutions of the above embodiments and belongs to the same inventive concept, this embodiment at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated herein one by one.

[0091] It should be noted that although the logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order from that in the flowchart. The terms "first", "second", etc. in the specification, claims and drawings are used to distinguish similar objects and do not necessarily describe a specific order or sequence.

[0092] It should also be understood that references to "one embodiment" or "some embodiments" etc. described in the specification of the embodiments of the present application mean that specific features, structures or characteristics described in connection with that embodiment are included in one or more embodiments of the embodiments of the present application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in another way. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in another way.

[0093] It should be noted that the technical solutions of the various embodiments of the present application can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0094] The above are only optional embodiments of the present application, and do not limit the patent scope of the present application accordingly. All equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present application under the application concept of the present application, or directly or indirectly applied in other related technical fields, are equally included in the patent protection scope of the present application.

Claims

1. A driving circuit for a display panel, characterized in that: The driving circuit of the display panel comprises: Gate drive unit; An electromagnetic coil, wherein the electromagnetic coil is wound around the gate driving unit in a preset direction; A driving chip connected to the electromagnetic coil; A temperature detection unit, the temperature detection unit is used to detect the current temperature of the gate driving unit and output a temperature detection signal; A control unit is connected to the temperature detection unit and the driving chip respectively, and is used to control the driving chip to supply power to the electromagnetic coil according to the temperature detection signal, so as to increase the temperature of the gate driving unit.

2. The driving circuit of the display panel according to claim 1, characterized in that: The temperature detection unit comprises: A temperature sensor, wherein a first end of the temperature sensor is connected to a power source, and a second end of the temperature sensor is grounded; An operational amplifier, wherein a first input terminal of the operational amplifier is connected to a third terminal of the temperature sensor, a second input terminal of the operational amplifier is connected to a fourth terminal of the temperature sensor, and an output terminal of the operational amplifier is connected to the control unit.

3. The driving circuit of the display panel according to claim 2, characterized in that: The temperature sensor comprises: a first resistor, a second resistor, a third resistor and a fourth resistor, wherein one of the first resistor, the second resistor, the third resistor and the fourth resistor is a thermistor; The first end of the first resistor and the first end of the third resistor are connected together as the first end of the temperature sensor; The first end of the second resistor and the first end of the fourth resistor are connected together as the second end of the temperature sensor; The second end of the first resistor and the second end of the second resistor are connected together as the third end of the temperature sensor; The second end of the third resistor and the second end of the fourth resistor are connected together as the fourth end of the temperature sensor.

4. The driving circuit of the display panel according to claim 1, characterized in that: The control chip controls the driving chip to supply power to the electromagnetic coil during a blank time between frame refreshes.

5. The driving circuit of the display panel according to claim 1, wherein: The driving circuit of the display panel further includes: A shielding layer is provided between the gate driving unit and the electromagnetic coil.

6. The driving circuit of the display panel according to claim 5, characterized in that: The electromagnetic coil is arranged around the shielding layer.

7. The driving circuit of the display panel according to claim 5, characterized in that: The electromagnetic coil is arranged on one side of the shielding layer and is wound around a conductor medium in the gate driving unit.

8. The driving circuit of the display panel according to claim 1, wherein: The control unit is used for controlling the driving chip to supply power to the electromagnetic coil to increase the temperature of the gate driving unit when the current temperature of the gate driving unit is less than a preset temperature threshold.

9. An array substrate, characterized in that: The array substrate comprises an effective display area and an ineffective display area, wherein the ineffective display area surrounds the periphery of the effective display area, and the driving circuit of the display panel according to any one of claims 1 to 8 is arranged in the ineffective display area of ​​the array substrate.

10. A display panel, characterized in that: The display panel comprises: a color filter substrate, a liquid crystal layer and the array substrate according to claim 9, wherein the liquid crystal layer is arranged between the array substrate and the color filter substrate.

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