Coupling control circuit, display driving circuit, array substrate and display panel

Abstract

The embodiment of the invention discloses a coupling control circuit, a display driving circuit, an array substrate and a display panel, and belongs to the technical field of display. The coupling control circuit comprises a coupling voltage source; the first end of the coupling control unit is electrically connected with a coupling voltage source through a coupling line, the controlled end of the coupling control unit is electrically connected with the gate line, the second end of the coupling control unit is electrically connected with the pixel driving circuit, and under the condition that the pixel driving circuit enters a charging state based on a gate control signal output by the gate line, the coupling control unit is electrically connected with the coupling voltage source. The coupling control unit provides a coupling voltage to the pixel driving circuit based on a coupling voltage source. According to the embodiment of the invention, the pixel charging rate can be greatly improved on the premise that the influence on the display screen load and the aperture opening ratio is small.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of display technology, and in particular to a coupling control circuit, a display driving circuit, an array substrate, and a display panel. Background Art

[0002] As an important part of modern display technology, liquid crystal display technology has made great progress in recent years. As users' requirements for visual experience continue to increase, the resolution and refresh rate of LCD screens have become key indicators to measure their performance. However, as the resolution and refresh rate continue to increase, LCD screens are facing the problem of insufficient pixel charging rate.

[0003] In order to solve this problem, the related technology generally improves the charging capacity of the pixel by increasing the channel width of the pixel driving transistor, but this method will cause problems such as increased display load and reduced aperture ratio, limiting the performance of the display. Summary of the invention

[0004] The main purpose of the embodiments of the present application is to provide a coupling control circuit, a display driving circuit, an array substrate and a display panel, aiming to solve the technical problem of how to improve the pixel charging rate with little impact on the display screen load and aperture ratio.

[0005] To achieve the above object, an embodiment of the present application provides a coupling control circuit, the coupling control circuit comprising: coupling voltage source; A coupling control unit, wherein a first end of the coupling control unit is electrically connected to the coupling voltage source through a coupling line, a controlled end of the coupling control unit is electrically connected to a gate line, and a second end of the coupling control unit is electrically connected to a pixel driving circuit, and when the pixel driving circuit enters a charging state based on a gate control signal output by the gate line, the coupling control unit provides a coupling voltage to the pixel driving circuit based on the coupling voltage source.

[0006] In some feasible embodiments, the coupling control unit includes: a coupling transistor, wherein a first end of the coupling transistor is electrically connected to the coupling voltage source through a coupling line, a controlled end of the coupling transistor is electrically connected to the gate line, and the coupling transistor is turned on when the pixel driving circuit enters a charging state based on a gate control signal output by the gate line; A coupling capacitor, one end of which is electrically connected to the second end of the coupling transistor, and the other end of which is electrically connected to the pixel electrode in the pixel driving circuit, and when the coupling transistor is turned on, the coupling capacitor provides the coupling voltage to the pixel electrode based on the coupling voltage source.

[0007] In some feasible embodiments, the coupling voltage source includes a first polarity voltage source and a second polarity voltage source, the output signals of the first polarity voltage source and the second polarity voltage source have opposite polarities, and the connection method between the coupling control unit and the first polarity voltage source and / or the second polarity voltage source is determined according to the pixel polarity of the pixel driving circuit.

[0008] In some feasible embodiments, when the polarities of the pixels in adjacent rows are opposite, the number of the coupling control units, the number of the coupling lines and the number of the gate lines are the same; The coupling control unit electrically connected to the gate lines of adjacent rows is electrically connected to the first polarity voltage source and the second polarity voltage source through the coupling lines of the adjacent rows, respectively.

[0009] In some feasible embodiments, when the polarities of the pixels in adjacent columns are opposite, the coupling control unit includes a first polarity coupling control unit and a second polarity coupling control unit, the coupling lines include a first polarity coupling line and a second polarity coupling line, and the number of the first polarity coupling control units, the number of the second polarity coupling control units, the number of the first polarity coupling lines, the number of the second polarity coupling lines, and the number of the gate lines are the same; The first polarity coupling control unit is electrically connected to the first polarity voltage source through the first polarity coupling line; The second polarity coupling control unit is electrically connected to the second polarity voltage source through the second polarity coupling line.

[0010] In some feasible embodiments, the first polarity voltage source is generated based on an AC signal; The second polarity voltage source is generated based on the first polarity voltage source, a first transistor, a second transistor, a first polarity DC voltage, and a second polarity DC voltage.

[0011] In some feasible embodiments, the controlled end and the first end of the first transistor are both connected to the first polarity DC voltage, the second end of the first transistor is electrically connected to the first end of the second transistor, the controlled end of the second transistor is electrically connected to the first polarity voltage source, the second end of the second transistor is connected to the second polarity DC voltage, the second polarity voltage source is output via the second end of the first transistor and the first end of the second transistor, and the channel width-to-length ratio of the first transistor is smaller than the channel width-to-length ratio of the second transistor.

[0012] In addition, to achieve the above-mentioned purpose, an embodiment of the present application also provides a display driving circuit, which includes: a data line, a gate line, a pixel driving circuit and the coupling control circuit as described above, the pixel driving circuit is electrically connected to the data line, the gate line and the coupling control circuit, respectively, and when the pixel driving circuit enters a charging state based on a gate control signal output by the gate line, the coupling control unit provides a coupling voltage to the pixel driving circuit based on the coupling voltage source.

[0013] In addition, to achieve the above-mentioned purpose, an embodiment of the present application also provides an array substrate, which includes an effective display area and an ineffective display area, and the ineffective display area surrounds the periphery of the effective display area. The display driving circuit as described above is arranged in the ineffective display area of ​​the array substrate.

[0014] In addition, to achieve the above purpose, an embodiment of the present application also provides a display panel, which includes: a color filter substrate, a liquid crystal layer and the array substrate as described above, and the liquid crystal layer is arranged between the array substrate and the color filter substrate.

[0015] The embodiment of the present application proposes a coupling control circuit, a display driving circuit, an array substrate and a display panel, wherein the coupling control circuit comprises: a coupling voltage source; a coupling control unit, wherein the first end of the coupling control unit is electrically connected to the coupling voltage source through a coupling line, the controlled end of the coupling control unit is electrically connected to the gate line, and the second end of the coupling control unit is electrically connected to the pixel driving circuit, and when the pixel driving circuit enters a charging state based on a gate control signal output by the gate line, the coupling control unit provides a coupling voltage to the pixel driving circuit based on the coupling voltage source. The coupling control circuit provided in the embodiment of the present application provides a coupling voltage to the pixel driving circuit when the pixel driving circuit enters a charging state, thereby adjusting the charging starting voltage of the pixel electrode, thereby reducing the difficulty of charging, so that the pixel electrode can quickly reach the required voltage, without increasing the channel width of the pixel driving transistor, and can also improve the pixel charging rate, without causing problems such as increased display screen load and reduced aperture ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only part of the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of a coupling control circuit provided in one embodiment of the present application; Figure 2A schematic diagram of the structure of a coupling control circuit provided in another embodiment of the present application; Figure 3 A schematic diagram of the structure of a coupling control circuit provided in yet another embodiment of the present application; Figure 4 A schematic diagram of a specific connection method between a coupling control circuit and a pixel driving circuit provided in an embodiment of the present application; Figure 5 A schematic diagram of a driving waveform involved in the coupling control circuit provided in an embodiment of the present application; Figure 6 A schematic diagram of another specific connection method between the coupling control circuit and the pixel driving circuit provided in an embodiment of the present application; Figure 7 A structural schematic diagram of another specific connection method between the coupling control circuit and the pixel driving circuit provided in an embodiment of the present application; Figure 8 A schematic diagram of another driving waveform involved in the coupling control circuit provided in an embodiment of the present application; Fig. 9 A schematic diagram of the structure of a display driving circuit provided in an embodiment of the present application; Fig.10 A schematic diagram of the structure of an array substrate provided in an embodiment of the present application; Fig.11 A schematic diagram of the structure of a display panel provided in an embodiment of the present application.

[0018] Description of Figure Numbers: 10. Coupling voltage source; 20. Coupling control unit; T. Coupling transistor; C. Coupling capacitor; T1. First transistor; T2. Second transistor; 101. Effective display area; 102. Display driving circuit; 100. Array substrate; 200. Color film substrate; 300. Liquid crystal layer. DETAILED DESCRIPTION

[0019] In the following description, specific details such as specific system structures, technologies, etc. are proposed for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art 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 prevent unnecessary details from hindering the description of the embodiments of the present application.

[0020] As an important part of modern display technology, liquid crystal display technology has made great progress in recent years. As users' requirements for visual experience continue to increase, the resolution and refresh rate of LCD screens have become key indicators to measure their performance. High resolution can present more delicate and clear images, while high refresh rate can reduce image smear and blur, making dynamic images smoother and more natural.

[0021] However, as resolution and refresh rate continue to increase, LCD screens face a serious challenge, namely the problem of insufficient pixel charging rate. Pixel charging rate refers to the ability of a pixel electrode to charge to a predetermined voltage within a given time, which directly affects the display effects such as brightness and contrast of the display. Under the conditions of high resolution and high refresh rate, the charging time of each pixel is greatly shortened, while the amount of charge required by the pixel remains unchanged or even increases, which leads to a significant decrease in pixel charging rate.

[0022] In order to meet this challenge, the prior art generally adopts the method of increasing the channel width of the pixel driving transistor to improve the charging capacity of the pixel. As a key component in the liquid crystal display, the driving transistor is responsible for controlling the charging and discharging process of the pixel electrode. Increasing the channel width can increase the on-current of the driving transistor, thereby charging enough charge for the pixel electrode in a shorter time. However, this method has the following defects: on the one hand, increasing the channel width will lead to an increase in the load of the display screen. The increase in the channel width of the driving transistor means that the driving current required for each pixel also increases, which puts higher requirements on the driving circuit of the display screen. If the driving circuit cannot provide sufficient current, it will cause problems such as uneven brightness of the display screen and prolonged response time. On the other hand, increasing the channel width will also reduce the aperture ratio of the display screen. The aperture ratio refers to the ratio of the effective light-transmitting area of ​​the pixel electrode to the entire pixel area. It directly affects the light transmittance and brightness of the display screen. The increase in the channel width will occupy more pixel area, resulting in a decrease in the aperture ratio, thereby reducing the brightness and contrast of the display screen. Therefore, although increasing the channel width of the pixel driving transistor can alleviate the problem of insufficient pixel charging rate to a certain extent, this method has the disadvantages of increased display load and reduced aperture ratio, limiting the ability to further improve display performance.

[0023] Based on this, the embodiments of the present application provide a coupling control circuit, a display driving circuit, an array substrate and a display panel. By providing a coupling voltage to the pixel driving circuit when it enters a charging state, the charging starting voltage of the pixel electrode is adjusted, thereby reducing the charging difficulty, so that the pixel electrode can quickly reach the required voltage. There is no need to increase the channel width of the pixel driving transistor, and the pixel charging rate can be improved without causing problems such as increased display screen load and reduced aperture ratio.

[0024] The coupling control circuit, display driving circuit, array substrate and display panel provided in the embodiments of the present application are specifically described through the following embodiments. First, the coupling control circuit in the embodiments of the present application is described.

[0025] The present application embodiment provides a coupling control circuit, referring to Figure 1 , Figure 1 This is a schematic diagram of a coupling control circuit provided in an embodiment of the present application. In this embodiment, the coupling control circuit includes: A coupling voltage source 10; A coupling control unit 20, wherein a first end of the coupling control unit 20 is electrically connected to a coupling voltage source 10 via a coupling line, a controlled end of the coupling control unit 20 is electrically connected to a gate line, and a second end of the coupling control unit 20 is electrically connected to a pixel driving circuit. When the pixel driving circuit enters a charging state based on a gate control signal output by the gate line, the coupling control unit 20 provides a coupling voltage to the pixel driving circuit based on the coupling voltage source 10.

[0026] In this embodiment, an example is given in which a pixel driving circuit is only used to charge one pixel out of n pixels in a display panel. Correspondingly, a coupling control circuit is used to provide a coupling voltage to the pixel when the pixel enters a charging state, so that when the corresponding driving transistor of the pixel is turned on by a gate driving signal from a gate line, the charging start voltage thereof can be raised based on the coupling voltage from the coupling control circuit. In this way, even under conditions of high resolution and high refresh rate, the charging time of each pixel is greatly shortened, and the pixel can reach the required voltage within a shorter charging time, without affecting the display effect of the display panel.

[0027] As an example, when n pixel driving circuits are required to drive n pixels in the display panel, n coupling control circuits can be correspondingly set and connected one-to-one with the n pixel driving circuits to provide coupling voltages for the n pixels. Alternatively, n coupling control units can share a coupling voltage source to provide coupling voltages for the n pixels. This embodiment does not impose any restrictions on this.

[0028] The embodiment of the present application provides a coupling control circuit, which adjusts the charging starting voltage of the pixel electrode by providing a coupling voltage to the pixel driving circuit when the pixel driving circuit enters the charging state, thereby reducing the charging difficulty, so that the pixel electrode can quickly reach the required voltage without increasing the channel width of the pixel driving transistor, and can also improve the pixel charging rate without causing problems such as increased display screen load and reduced aperture ratio.

[0029] In some possible embodiments, reference Figure 2 , the coupling control unit 20 may specifically include: A coupling transistor T, a first end of the coupling transistor T is electrically connected to a coupling voltage source 10 through a coupling line, a controlled end of the coupling transistor R is electrically connected to a gate line, and the coupling transistor R is turned on when the pixel driving circuit enters a charging state based on a gate control signal output by the gate line; A coupling capacitor C, one end of which is electrically connected to the second end of the coupling transistor T, and the other end of which is electrically connected to the pixel electrode in the pixel driving circuit. When the coupling transistor T is turned on, the coupling capacitor C provides a coupling voltage to the pixel electrode based on the coupling voltage source 10.

[0030] In this embodiment, one coupling transistor T can be connected to a plurality of coupling capacitors C, and the number of coupling capacitors C is related to the pixel polarity of the display panel and the number of pixels in the same row.

[0031] In this embodiment, the coupling transistor T may be a TFT (Thin Film Transistor), or a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), or other devices with similar characteristics, which is not limited in this embodiment.

[0032] In some possible embodiments, reference Figure 3 The coupling voltage source 10 includes a first polarity voltage source VHL and a second polarity voltage source VLH. The polarities of the output signals of the first polarity voltage source VHL and the second polarity voltage source VLH are opposite. The connection method between the coupling control unit and the first polarity voltage source VHL and / or the second polarity voltage source VLH is determined according to the pixel polarity of the pixel driving circuit.

[0033] In this embodiment, taking a liquid crystal display as an example, since the liquid crystal display needs to perform polarity inversion, the coupling lines of all pixels of the same polarity in a frame need to be connected to a coupling voltage source of the same polarity (such as a first polarity voltage source VHL), and the coupling lines of pixels of another polarity need to be connected to another coupling voltage source of the same polarity (such as a second polarity voltage source VLH).

[0034] In practical applications, the coupling voltage source provided in this embodiment can be implemented with only two signal transmission lines, which can effectively save space.

[0035] In some possible embodiments, reference Figure 4 , when the polarities of pixels in adjacent rows are opposite, the number of coupling control units, the number of coupling lines and the number of gate lines are the same; The coupling control unit electrically connected to the gate lines of the adjacent rows is electrically connected to the first polarity voltage source and the second polarity voltage source through the coupling lines of the adjacent rows, respectively.

[0036] In this embodiment, Figure 4 FIG. 1 is a structural schematic diagram showing a specific connection mode between a coupling control circuit and a pixel driving circuit when the polarities of pixels in adjacent rows are opposite. Figure 4 The specific structure of 16 pixels in 4 rows and 4 columns and their pixel driving circuit is shown. Gn, Gn+1, Gn+2 and Gn+3 are 4 rows of gate lines respectively. Each row of gate lines is connected to a coupling transistor, and each coupling transistor is connected to 4 coupling capacitors. Therefore, there are a total of 4*4=16 coupling capacitors to provide coupling voltages for corresponding pixels; since the first row of pixels and the third row of pixels are positive polarity "+", the corresponding coupling transistors are electrically connected to the first polarity voltage source. Similarly, since the second row of pixels and the fourth row of pixels are negative polarity "-", the corresponding coupling transistors are electrically connected to the second polarity voltage source.

[0037] Since the pixels require opposite polarities, the signals provided by the first polarity voltage source VHL and the second polarity voltage source VLH are a pair of signals with opposite polarities all the time, and the polarities need to be switched in adjacent frames (for example, the Nth frame and the N+1th frame), such as Figure 5 As shown by Figure 5 It can be seen that in the Nth frame, when Gn is turned on, the VHL signal will be sent to the polarity 1 coupling line through the corresponding control TFT. The polarity of the polarity 1 coupling line is the same as the polarity of the corresponding pixel to be charged, which will ensure that the coupling direction of the coupling line is consistent with the charging direction of the pixel electrode; when entering the N+1th frame, the pixel corresponding to polarity 1 needs to be charged with a voltage opposite to that of the Nth frame. It happens that VHL has also changed to another polarity at this time. When Gn is turned on, it can also meet the same direction jump as the pixel of the N+1th frame, thereby achieving the purpose of increasing the charging rate by coupling in the same direction.

[0038] In some possible embodiments, reference Figure 5 , when the polarities of pixels in adjacent columns are opposite, the coupling control unit includes a first polarity coupling control unit and a second polarity coupling control unit, the coupling line includes a first polarity coupling line and a second polarity coupling line, and the number of the first polarity coupling control units, the number of the second polarity coupling control units, the number of the first polarity coupling lines, the number of the second polarity coupling lines and the number of the gate lines are the same; The first polarity coupling control unit is electrically connected to the first polarity voltage source through a first polarity coupling line; The second polarity coupling control unit is electrically connected to the second polarity voltage source through a second polarity coupling line.

[0039] In this embodiment, Figure 6 FIG. 1 shows a structural schematic diagram of a specific connection mode between the coupling control circuit and the pixel driving circuit when the polarities of pixels in adjacent columns are opposite, which is similar to the row inversion in the above-mentioned embodiment. Figure 6 The specific structure of 16 pixels in 4 rows and 4 columns and their pixel driving circuit is shown. Gn, Gn+1, Gn+2 and Gn+3 are 4 rows of gate lines respectively. Each row of gate lines is connected to 2 coupling transistors, and each coupling transistor is connected to 2 coupling capacitors. Therefore, there are a total of 8*2=16 coupling capacitors to provide coupling voltages for corresponding pixels; since the first column of pixels and the third column of pixels are positive polarity "+", the corresponding coupling transistors are electrically connected to the first polarity voltage source. Similarly, since the second row of pixels and the fourth row of pixels are negative polarity "-", the corresponding coupling transistors are electrically connected to the second polarity voltage source.

[0040] In this embodiment, the working waveforms of the signals provided by the first polarity voltage source VHL and the second polarity voltage source VLH are similar to Figure 5 The embodiments are basically the same, and the working principles are similar. Based on the foregoing embodiments, it is not difficult to know the specific driving waveform of this embodiment, so it will not be described in detail.

[0041] In some feasible embodiments, the first polarity voltage source is generated based on an AC signal; The second polarity voltage source VLH is generated based on the first polarity voltage source VHL, the first transistor T1, the second transistor T2, the first polarity DC voltage and the second polarity DC voltage.

[0042] In this embodiment, when the external circuit is insufficient to provide the AC signals VHL and VLH at the same time, only the VHL signal may be provided, and the VLH signal is generated by an externally provided first polarity DC voltage (such as a high voltage DC signal VDD) and a second polarity DC voltage (such as a low voltage DC signal VEE), as well as a first transistor T1 and a second transistor T2.

[0043] In some possible embodiments, reference Figure 7 , the controlled end and the first end of the first transistor T1 are both connected to the first polarity DC voltage, the second end of the first transistor T1 is electrically connected to the first end of the second transistor T2, the controlled end of the second transistor T2 is electrically connected to the first polarity voltage source VHL, the second end of the second transistor T2 is connected to the second polarity DC voltage, the second polarity voltage source VLH is output via the second end of the first transistor T1 and the first end of the second transistor T2, and the channel width-to-length ratio of the first transistor T1 is smaller than the channel width-to-length ratio of the second transistor T2.

[0044] In this embodiment, the channel width-to-length ratio of the first transistor T1 needs to be much smaller than that of the second transistor T2 to ensure that when the VHL voltage is high, the equivalent resistance of the second transistor T2 is much smaller than the equivalent resistance of the first transistor T1, so that VLH can output a low voltage.

[0045] As an example, the driving waveform involved in this embodiment is as follows: Figure 8 As shown by Figure 8 It can be seen that in the Nth frame, when VHL is high, the output VLH is low; in the N+1th frame, when VHL is low, the output VLH is high.

[0046] In addition, the embodiment of the present application also provides a display driving circuit, referring to Fig. 9 In this embodiment, the display driving circuit includes: a data line, a gate line, a pixel driving circuit and the coupling control circuit as described above. The pixel driving circuit is electrically connected to the data line, the gate line and the coupling control circuit respectively. When the pixel driving circuit enters a charging state based on a gate control signal output by the gate line, the coupling control unit provides a coupling voltage to the pixel driving circuit based on a coupling voltage source.

[0047] The specific structure of the coupling control circuit in this embodiment refers to the above embodiment. Since the display driving circuit provided by this embodiment adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0048] In addition, the present application also provides an array substrate, referring to Fig.10 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 effective display area 101, and the above-mentioned display driving circuit 102 is arranged in the non-effective display area of ​​the array substrate.

[0049] The specific structure of the display driving circuit 102 in this embodiment refers to the above embodiment. Since the array substrate provided in this embodiment adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0050] In addition, the present application also provides a display panel, referring to Fig.11 The display panel includes an array substrate 100 , a color filter substrate 200 and a liquid crystal layer 300 , wherein the liquid crystal layer 300 is disposed between the array substrate 100 and the color filter substrate 200 .

[0051] As an example, the display panel in this embodiment can 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, and of course, it can also be other types of display panels, such as an OLED (Organic Light-Emitting Diode) display panel.

[0052] As an example, the display panel can be applied to a display device, which can 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.

[0053] Those skilled in the art will understand that Fig.11 The structure shown in the figure does not constitute a limitation on the display device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0054] The specific structure of the array substrate 100 in this embodiment refers to the above embodiment. Since the display panel proposed in this embodiment adopts all the technical solutions of all the above embodiments and belongs to the same technical concept, this embodiment at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0055] It should be noted that although a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than that in the flowchart. The terms "first", "second", etc. in the specification, claims and drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0056] It should also be understood that the references to "one embodiment" or "some embodiments" described in the specification of the embodiments of the present application mean that one or more embodiments of the embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0057] 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 they can be implemented by technical personnel in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0058] The above are only optional embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structures or equivalent process changes made using the contents of the present application specification and drawings under the application concept of the present application, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A coupling control circuit, characterized in that: The coupling control circuit comprises: coupling voltage source; A coupling control unit, wherein a first end of the coupling control unit is electrically connected to the coupling voltage source through a coupling line, a controlled end of the coupling control unit is electrically connected to a gate line, and a second end of the coupling control unit is electrically connected to a pixel driving circuit, and when the pixel driving circuit enters a charging state based on a gate control signal output by the gate line, the coupling control unit provides a coupling voltage to the pixel driving circuit based on the coupling voltage source.

2. The coupling control circuit according to claim 1, characterized in that: The coupling control unit comprises: a coupling transistor, wherein a first end of the coupling transistor is electrically connected to the coupling voltage source through a coupling line, a controlled end of the coupling transistor is electrically connected to the gate line, and the coupling transistor is turned on when the pixel driving circuit enters a charging state based on a gate control signal output by the gate line; A coupling capacitor, one end of which is electrically connected to the second end of the coupling transistor, and the other end of which is electrically connected to the pixel electrode in the pixel driving circuit, and when the coupling transistor is turned on, the coupling capacitor provides the coupling voltage to the pixel electrode based on the coupling voltage source.

3. The coupling control circuit according to claim 1 or 2, characterized in that: The coupling voltage source includes a first polarity voltage source and a second polarity voltage source, the output signals of the first polarity voltage source and the second polarity voltage source have opposite polarities, and the connection method between the coupling control unit and the first polarity voltage source and / or the second polarity voltage source is determined according to the pixel polarity of the pixel driving circuit.

4. The coupling control circuit according to claim 3, characterized in that: In the case where the polarities of the pixels in adjacent rows are opposite, the number of the coupling control units, the number of the coupling lines and the number of the gate lines are the same; The coupling control unit electrically connected to the gate lines of adjacent rows is electrically connected to the first polarity voltage source and the second polarity voltage source through the coupling lines of the adjacent rows, respectively.

5. The coupling control circuit according to claim 3, characterized in that: In the case where the polarities of the pixels in adjacent columns are opposite, the coupling control unit includes a first polarity coupling control unit and a second polarity coupling control unit, the coupling lines include a first polarity coupling line and a second polarity coupling line, and the number of the first polarity coupling control units, the number of the second polarity coupling control units, the number of the first polarity coupling lines, the number of the second polarity coupling lines and the number of the gate lines are the same; The first polarity coupling control unit is electrically connected to the first polarity voltage source through the first polarity coupling line; The second polarity coupling control unit is electrically connected to the second polarity voltage source through the second polarity coupling line.

6. The coupling control circuit according to claim 3, characterized in that: The first polarity voltage source is generated based on an AC signal; The second polarity voltage source is generated based on the first polarity voltage source, a first transistor, a second transistor, a first polarity DC voltage, and a second polarity DC voltage.

7. The coupling control circuit according to claim 6, characterized in that: The controlled end and the first end of the first transistor are both connected to the first polarity DC voltage, the second end of the first transistor is electrically connected to the first end of the second transistor, the controlled end of the second transistor is electrically connected to the first polarity voltage source, the second end of the second transistor is connected to the second polarity DC voltage, the second polarity voltage source is output via the second end of the first transistor and the first end of the second transistor, and the channel width-to-length ratio of the first transistor is smaller than the channel width-to-length ratio of the second transistor.

8. A display driving circuit, characterized in that: The display driving circuit includes: a data line, a gate line, a pixel driving circuit and a coupling control circuit as described in any one of claims 1 to 7, the pixel driving circuit is electrically connected to the data line, the gate line and the coupling control circuit, respectively, and when the pixel driving circuit enters a charging state based on a gate control signal output by the gate line, the coupling control unit provides a coupling voltage to the pixel driving circuit based on the coupling voltage source.

9. An array substrate, characterized in that: The array substrate comprises an effective display area and a non-effective display area, wherein the non-effective display area surrounds the periphery of the effective display area, and the display driving circuit according to claim 8 is arranged in the non-effective 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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