Gate driving circuit and display panel

Abstract

The present application relates to a gate drive circuit and a display panel, wherein the gate drive circuit includes an N-level GOA circuit and a signal conversion circuit connected to the GOA circuit in a one-to-one correspondence; wherein the signal conversion circuit is used to convert an input signal to be processed into a control signal and transmit the control signal to the GOA circuit; the GOA circuit performs a corresponding action according to the control signal; the signal to be processed is a signal transmitted to the GOA circuit; and the control signal is a gate high-level signal or a pull-down control signal. Since a signal conversion circuit is introduced into the gate drive circuit of the present application, a gate high-level signal or a pull-down control signal is input to the GOA circuit by the signal conversion circuit, thereby saving a signal line for transmitting a gate high-level signal or a pull-down control signal, reducing the complexity of the GOA circuit area, and reducing the area of ​​the GOA circuit area.

Description

Technical Field

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

[0002] With the continuous development of display technology, people have higher and higher requirements on the performance of display products. For example, in high-end display products, people are constantly pursuing higher refresh rates and better display effects. In order to improve the refresh rate and display effect, traditional technology will add high-level signals to the GOA (Gate On Array) circuit area. However, adding this high-level signal line will increase the complexity of the GOA circuit area, resulting in an increase in the area of ​​the GOA circuit area. Summary of the invention

[0003] Based on this, it is necessary to provide a gate driving circuit and a display panel to address the problem that the traditional GOA circuit area has a complex structure and a large area.

[0004] In order to achieve the above-mentioned object, on the one hand, an embodiment of the present application provides a gate driving circuit, including N-level GOA circuits and signal conversion circuits connected to the GOA circuits in a one-to-one correspondence;

[0005] Among them, the signal conversion circuit converts the input signal to be processed into a control signal and transmits the control signal to the GOA circuit; the GOA circuit performs corresponding actions according to the control signal; the signal to be processed is the signal transmitted to the GOA circuit; the control signal is a gate high level signal or a pull-down control signal.

[0006] In one embodiment, when the control signal is a gate high level signal, the signal to be processed includes a first pull-down control signal transmitted by a first pull-down control line, and a second pull-down control signal transmitted by a second pull-down control line;

[0007] The signal conversion circuit is connected to the GOA circuit, the first pull-down control line and the second pull-down control line respectively; the GOA circuit is connected to the first pull-down control line and the second pull-down control line respectively;

[0008] The signal conversion circuit converts the first pull-down control signal and the second pull-down control signal into a gate high level signal, and transmits the gate high level signal to the GOA circuit.

[0009] In one of the embodiments, the signal conversion circuit includes a first switch unit and a second switch unit;

[0010] The first end of the first switch unit is connected to the first pull-down control line, and the second end is respectively connected to the first end of the second switch unit and the GOA circuit;

[0011] The second end of the second switch unit is connected to the second pull-down control line.

[0012] In one of the embodiments, the first switch unit includes a first thin film transistor;

[0013] The gate and source of the first thin film transistor are connected to the first pull-down control line, and the drain is connected to the first end of the second switch unit and the GOA circuit respectively.

[0014] In one of the embodiments, the second switch unit includes a second thin film transistor;

[0015] The gate and source of the second thin film transistor are connected to the second pull-down control line, and the drain is connected to the second end of the first switch unit and the GOA circuit respectively.

[0016] In one embodiment, when the control signal is a pull-down control signal; the signal to be processed includes the original pull-down control signal transmitted by the pull-down control line, and the gate high level signal transmitted by the gate control line;

[0017] The signal conversion circuit is connected to the GOA circuit, the pull-down control line and the gate control line respectively; the GOA circuit is connected to the pull-down control line and the gate control line respectively;

[0018] The signal conversion circuit converts the original pull-down control signal and the gate high level signal into a pull-down control signal, and transmits the pull-down control signal to the GOA circuit.

[0019] In one of the embodiments, the signal conversion circuit includes a third switch unit and a fourth switch unit;

[0020] The first end of the third switch unit is connected to the gate control line, and the second end is respectively connected to the first end of the fourth switch unit and the GOA circuit;

[0021] A second end of the fourth switch unit is connected to the pull-down control line, and a third end thereof is connected to the Vss signal.

[0022] In one embodiment, the third switch unit includes a third thin film transistor and a resistor;

[0023] The gate and source of the third thin film transistor are connected to the gate control line, and the drain is respectively connected to the first end of the fourth switch unit and the GOA circuit through a resistor.

[0024] In one of the embodiments, the fourth switch unit includes a fourth thin film transistor;

[0025] The drain of the fourth thin film transistor is respectively connected to the second end of the third switch unit and the GOA circuit, the gate is connected to the pull-down control line, and the source is connected to the Vss signal.

[0026] On the other hand, an embodiment of the present application further provides a display panel, including a display layer and a gate driving circuit as described above; the gate driving circuit is connected to the display layer and is used to drive the display layer to emit light.

[0027] One of the above technical solutions has the following advantages and beneficial effects:

[0028] The gate drive circuit of the present application includes an N-level GOA circuit and a signal conversion circuit, and the N-level GOA circuits are connected in sequence, and the signal conversion circuit is connected to the GOA circuit in a one-to-one correspondence. The signal conversion circuit converts the input signal to be processed into a control signal, and then transmits the control signal to the GOA circuit, and the GOA circuit performs a corresponding action according to the control signal. Since the signal conversion circuit is introduced into the gate drive circuit of the present application, the signal conversion circuit inputs a gate high-level signal or a pull-down control signal to the GOA circuit, thereby saving a signal line for transmitting a gate high-level signal or a pull-down control signal, reducing the complexity of the GOA circuit area, and reducing the area of ​​the GOA circuit area. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of a gate drive circuit provided for the implementation of the present application.

[0030] Figure 2 A signal line connection diagram of a gate drive circuit provided for the implementation of the present application.

[0031] Figure 3 A schematic diagram of a structure of a signal conversion circuit provided for the implementation of the present application.

[0032] Figure 4 A waveform diagram of a signal provided for the implementation of this application.

[0033] Figure 5 Another signal line connection schematic diagram of the gate drive circuit provided for the implementation of the present application.

[0034] Figure 6 Another structural schematic diagram of a signal conversion circuit provided for the implementation of the present application.

[0035] Figure 7 Another signal waveform diagram provided for the implementation of the present application. DETAILED DESCRIPTION

[0036] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0037] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to another element and integrated therewith, or there may be an intermediate element at the same time. The terms "installed", "one end", "the other end" and similar expressions used herein are for illustrative purposes only.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0039] GOA circuit area 1, or GOA driving layer, is used to drive the display layer in the display panel to emit light. In conventional technology, in order to transmit signals, a variety of signal lines are set in GOA circuit area 1, such as gate control lines, pull-down control lines, data signal lines, etc. Setting many signal lines will increase the complexity of GOA circuit area 1, resulting in a large area of ​​GOA circuit area 1.

[0040] In order to solve the above problems, Figure 1 As shown, a gate driving circuit is provided, including N-level GOA circuits 1 and signal conversion circuits 2 connected to the GOA circuits 1 in a one-to-one correspondence.

[0041] The GOA circuit 1 drives the display layer of the display panel to emit light. The N-level GOA circuits 1 are connected in layers and are connected one-to-one with the scan lines. The number of GOA circuits 1 is set according to the resolution of the display panel. For example, for a display panel with a resolution of 2048*1024, the GOA circuit 1 has at least 1024 levels.

[0042] During operation, the GOA circuit 1 needs to obtain external input signals. The signal conversion circuit 2 is used to input the required control signal to the GOA circuit 1. Specifically, the signal conversion circuit 2 converts the input signal to be processed into a control signal, and transmits the control signal to the GOA circuit 1, and the GOA circuit 1 performs the corresponding action according to the control signal. The control signal can be a waveform signal. In one example, the control signal is a gate high-level signal, wherein the gate high-level signal is used to indicate that the GOA circuit 1 starts working. In another example, the control signal is a pull-down control signal, and the pull-down control signal is used to indicate that the GOA circuit 1 pulls down the Q point potential. It should be noted that the signal to be processed can be input by an external signal or by a signal on the gate drive circuit. It should be noted that the signal to be processed is a signal transmitted to the GOA circuit 1, that is, it is directly transmitted to the GOA circuit 1 through the signal line of the gate drive circuit.

[0043] The following describes in detail the specific structure of the signal conversion circuit 2 and the connection relationship between related devices when the control signal is a gate high level signal or a pull-down control signal.

[0044] In one example, when the control signal is a gate high level signal, the signal to be processed includes a first pull-down control signal transmitted by a first pull-down control line and a second pull-down control signal transmitted by a second pull-down control line, wherein the first pull-down control line and the second pull-down control line are signal lines arranged in the gate driving circuit.

[0045] like Figure 2 As shown, the signal conversion circuit 2 is respectively connected to the GOA circuit 1, the first pull-down control line and the second pull-down control line; the GOA circuit 1 is respectively connected to the first pull-down control line and the second pull-down control line. The first pull-down control line transmits the first pull-down control signal transmitted therein to the signal conversion circuit 2 and the GOA circuit 1. The second pull-down control line transmits the second pull-down control signal transmitted therein to the signal conversion circuit 2 and the GOA circuit 1. The signal conversion circuit 2 converts the first pull-down control signal and the second pull-down control signal into gate high level signals, and transmits the gate high level signals to the GOA circuit 1.

[0046] The signal conversion circuit 2 is implemented in various ways. In one example, Figure 3 As shown, the signal conversion circuit 2 includes a first switch unit 21 and a second switch unit 23; the first end of the first switch unit 21 is connected to the first pull-down control line, and the second end is respectively connected to the first end of the second switch unit 23 and the GOA circuit 1; the second end of the second switch unit 23 is connected to the second pull-down control line.

[0047] It should be noted that the first switch unit 21 can be turned off and on when driven by a corresponding start signal. The first switch unit 21 can be implemented in various ways. Figure 3 As shown, the first switch unit 21 includes a first thin film transistor T1; the gate and source of the first thin film transistor T1 are connected to the first pull-down control line, and the drain is respectively connected to the first end of the second switch unit 23 and the GOA circuit 1.

[0048] The second switch unit 23 can be turned on and off when driven by a corresponding start signal. The second switch unit 23 can be implemented in various ways. In one example, Figure 3 As shown, the second switch unit 23 includes a second thin film transistor T2; the gate and source of the second thin film transistor T2 are connected to the second pull-down control line, and the drain is connected to the second end of the first switch unit 21 and the GOA circuit 1 respectively.

[0049] As Figure 4The first pull-down control signal and the second pull-down control signal shown are used as examples for explanation. When the first pull-down control signal is high and the second pull-down control signal is low, the first thin film transistor is closed, and the gate high level signal is the high level of the first pull-down control signal. When the second pull-down control signal is high and the first pull-down control signal is low, the second thin film transistor is closed, and the gate high level signal is the high level of the second pull-down control signal. The gate high level signal is composed of the high level of the first pull-down control signal and the high level of the second pull-down control signal. As a result, the gate drive circuit in this example can save the gate control line, thereby reducing the complexity of the gate drive circuit.

[0050] In another example, when the control signal is a pull-down control signal, the signal to be processed includes the original pull-down control signal transmitted by the pull-down control line and the gate high level signal transmitted by the gate control line, wherein the pull-down control line and the gate control line are signal lines arranged in the gate driving circuit.

[0051] like Figure 5 As shown, the signal conversion circuit 2 is respectively connected to the GOA circuit 1, the pull-down control line and the gate control line; the GOA circuit 1 is respectively connected to the pull-down control line and the gate control line. It should be noted that the pull-down control line transmits the original pull-down control signal therein to the GOA circuit 1 and the signal conversion circuit 2 respectively. The gate control line transmits the gate high level signal therein to the GOA circuit 1 and the signal conversion circuit 2. The signal conversion circuit 2 converts the original pull-down control signal and the gate high level signal into a pull-down control signal, and transmits the pull-down control signal to the GOA circuit 1.

[0052] There are many ways to implement the signal conversion circuit 2. In one example, Figure 6 As shown, the signal conversion circuit 2 includes a third switch unit 25 and a fourth switch unit 27; the first end of the third switch unit 25 is connected to the gate control line, and the second end is respectively connected to the first end of the fourth switch unit 27 and the GOA circuit 1; the second end of the fourth switch unit 27 is connected to the pull-down control line, and the third end is connected to the Vss signal.

[0053] The third switch unit 25 is implemented in various ways. In one example, Figure 6 As shown, the third switch unit 25 includes a third thin film transistor T3 and a resistor R; the gate and source of the third thin film transistor T3 are connected to the gate control line, and the drain is connected to the first end of the fourth switch unit 27 and the GOA circuit 1 through the resistor R respectively.

[0054] The fourth switch unit 27 is implemented in various ways. In one example, Figure 6As shown, the fourth switch unit 27 includes a fourth thin film transistor T4; the drain of the fourth thin film transistor T4 is respectively connected to the second end of the third switch unit 25 and the GOA circuit 1, the gate is connected to the pull-down control line, and the source is connected to the Vss signal.

[0055] As Figure 7 The original pull-down control signal and the gate high level signal are used as examples for explanation. When the original pull-down control signal is at a high level, the fourth thin film transistor T4 is closed, and the pull-down control signal is a Vss signal, that is, the pull-down control signal is at a low level. When the original pull-down control signal is at a low level, the fourth thin film transistor T4 is disconnected, and the pull-down control signal is a gate high level signal, that is, the pull-down control signal is at a high level. Therefore, the gate drive circuit of this example can save a pull-down control line, thereby reducing the complexity of the gate drive circuit.

[0056] The gate drive circuit of the present application includes an N-level GOA circuit 1 and a signal conversion circuit 2. The N-level GOA circuits 1 are connected in sequence, and the signal conversion circuit 2 is connected to the GOA circuit 1 in a one-to-one correspondence. The signal conversion circuit 2 converts the input signal to be processed into a control signal, and then transmits the control signal to the GOA circuit 1, and the GOA circuit 1 performs a corresponding action according to the control signal. Since the signal conversion circuit 2 is introduced into the gate drive circuit of the present application, the signal conversion circuit 2 inputs a gate high-level signal or a pull-down control signal to the GOA circuit 1, thereby saving signal lines for transmitting gate high-level signals or pull-down control signals, reducing the complexity of the GOA circuit 1 area, and reducing the area of ​​the GOA circuit 1 area. At the same time, the production process can also be simplified.

[0057] The gate driving circuit of the present application is applied to a display panel, and a display panel is provided, comprising a display layer and the gate driving circuit as described above; the gate driving circuit is connected to the display layer and is used to drive the display layer to emit light.

[0058] It should be noted that the display layer emits light under the drive of the gate drive circuit to display content. The gate drive circuit in this embodiment is the same as the gate drive circuit in the gate drive circuit of the present application. For details, please refer to the above embodiment and will not be repeated here.

[0059] The display panel of the present application has a simple gate driving circuit structure and a small area, so that the display panel is small in size, the production process is simplified, and costs are saved.

[0060] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A gate drive circuit, characterized in that: It includes N-level GOA circuits and signal conversion circuits connected to the GOA circuits in a one-to-one correspondence; Wherein, the signal conversion circuit converts the input signal to be processed into a control signal, and transmits the control signal to the GOA circuit; the GOA circuit performs a corresponding action according to the control signal; the signal to be processed is a signal transmitted to the GOA circuit; the control signal is a gate high level signal or a pull-down control signal; When the control signal is a gate high level signal, the signal to be processed includes a first pull-down control signal transmitted by a first pull-down control line, and a second pull-down control signal transmitted by a second pull-down control line; The signal conversion circuit is respectively connected to the GOA circuit, the first pull-down control line and the second pull-down control line; the GOA circuit is respectively connected to the first pull-down control line and the second pull-down control line; Wherein, the signal conversion circuit converts the first pull-down control signal and the second pull-down control signal into the gate high level signal, and transmits the gate high level signal to the GOA circuit; When the control signal is a pull-down control signal, the signal to be processed includes an original pull-down control signal transmitted by the pull-down control line and a gate high level signal transmitted by the gate control line; The signal conversion circuit is respectively connected to the GOA circuit, the pull-down control line and the gate control line; the GOA circuit is respectively connected to the pull-down control line and the gate control line; Wherein, the signal conversion circuit converts the original pull-down control signal and the gate high level signal into the pull-down control signal, and transmits the pull-down control signal to the GOA circuit; When the control signal is a pull-down control signal, the signal conversion circuit includes a third switch unit and a fourth switch unit; The first end of the third switch unit is connected to the gate control line, and the second end is respectively connected to the first end of the fourth switch unit and the GOA circuit; The second end of the fourth switch unit is connected to the pull-down control line, and the third end is connected to the Vss signal.

2. The gate driving circuit according to claim 1, characterized in that: When the control signal is a gate high level signal, the signal conversion circuit includes a first switch unit and a second switch unit; A first end of the first switch unit is connected to the first pull-down control line, and a second end thereof is respectively connected to a first end of the second switch unit and the GOA circuit; The second end of the second switch unit is connected to the second pull-down control line.

3. The gate driving circuit according to claim 2, characterized in that: The first switch unit includes a first thin film transistor; The gate and source of the first thin film transistor are connected to the first pull-down control line, and the drain is respectively connected to the first end of the second switch unit and the GOA circuit.

4. The gate driving circuit according to claim 2, characterized in that: The second switch unit includes a second thin film transistor; The gate and source of the second thin film transistor are connected to the second pull-down control line, and the drain is connected to the second end of the first switch unit and the GOA circuit respectively.

5. The gate driving circuit according to claim 1, characterized in that: The third switch unit includes a third thin film transistor and a resistor; The gate and source of the third thin film transistor are connected to the gate control line, and the drain is respectively connected to the first end of the fourth switch unit and the GOA circuit through the resistor.

6. The gate driving circuit according to claim 1, characterized in that: The fourth switch unit includes a fourth thin film transistor; The drain of the fourth thin film transistor is respectively connected to the second end of the third switch unit and the GOA circuit, the gate is connected to the pull-down control line, and the source is connected to the Vss signal.

7. A display panel, characterized in that: comprising a display layer and a gate driving circuit as claimed in any one of claims 1 to 6; The gate driving circuit is connected to the display layer and is used for driving the display layer to emit light.

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