Driving circuit and display panel

Abstract

The application discloses a driving circuit and a display panel, comprising: a first response unit and a second response unit arranged in the same direction; a driving signal line, the extension direction of the driving signal line being the same as the arrangement direction of the first response unit and the second response unit; a selection signal line, the extension direction of the selection signal line intersecting with the arrangement direction of the first response unit and the second response unit; a selection circuit, the selection circuit being connected with the driving signal line and the selection signal line; wherein the output end of the selection circuit is connected with the first response unit and the second response unit respectively, and the selection circuit selects interaction with the first response unit or the second response unit in response to the selection signal sent by the selection signal line. The circuit provided by the application is connected with the selection circuit through one driving signal line, and one selection circuit is connected with two response units, so that the number of driving signal lines can be greatly reduced, thereby improving the aperture ratio of the display panel and further improving the display brightness of the liquid crystal display.

Description

Technical Field

[0001] The embodiments of this application relate to the field of liquid crystal display technology, and in particular to a driving circuit and a display panel. Background Technology

[0002] Display brightness is also an important reference parameter for LCD displays, and one of the main factors affecting display brightness is the aperture ratio. The aperture ratio refers to the ratio of the light-transmitting portion to the opaque portion of the entire panel. A higher aperture ratio indicates a larger proportion of light-transmitting portion, resulting in higher display brightness. In DLS (Data Line Sharing) architecture, due to the multiplied number of gate lines, the aperture ratio is lower, leading to a decrease in the brightness of the LCD monitor. Summary of the Invention

[0003] The embodiments of this application provide a driving circuit and a display panel to solve the technical problem of low display brightness in liquid crystal displays in the prior art.

[0004] To address the aforementioned technical problems, embodiments of this application disclose the following technical solutions:

[0005] In a first aspect, a driving circuit is provided, comprising:

[0006] First and second response units arranged in the same direction;

[0007] A drive signal line, wherein the extension direction of the drive signal line is the same as the arrangement direction of the first response unit and the second response unit;

[0008] The selection signal line extends in a direction that intersects the arrangement direction of the first response unit and the second response unit;

[0009] The selection circuit is connected to the drive signal line and the selection signal line;

[0010] The output terminal of the selection circuit is connected to the first response unit and the second response unit respectively. The selection circuit selects to interact with the first response unit or the second response unit in response to the selection signal emitted by the selection signal line.

[0011] In conjunction with the first aspect, the selection circuit includes a selection transistor, a first diode, and a second diode. The first control terminal of the selection transistor is connected to the drive signal line, the first input terminal of the selection transistor is connected to the selection signal line, and the first output terminal of the selection transistor is connected to the anode of the first diode and the cathode of the second diode. The cathode of the first diode is connected to the first response unit, and the anode of the second diode is connected to the second response unit.

[0012] In conjunction with the first aspect, the driving circuit further includes a control circuit, which includes a third diode, a first voltage signal line, and a ground line. The anode of the third diode is connected to the first response unit, and the cathode of the third diode is connected to either the first voltage signal line or the ground line.

[0013] In conjunction with the first aspect, the driving circuit further includes a control circuit, which includes a fourth diode and a second voltage signal line. The anode of the fourth diode is connected to either the ground line or the second voltage signal line, and the cathode of the fourth diode is connected to the second response unit.

[0014] In conjunction with the first aspect, the control circuit further includes a first switch and a first start signal line, wherein the second input terminal of the first switch is connected to the cathode of the third diode, the second output terminal of the first switch is connected to the ground wire, and the second control terminal of the first switch is connected to the first start signal line.

[0015] In conjunction with the first aspect, the control circuit further includes a second switch and a second start signal line, the third input terminal of the second switch is connected to the cathode of the third diode, the third output terminal of the second switch is connected to the first voltage signal line, and the third control terminal of the second switch is connected to the second start signal line.

[0016] In conjunction with the first aspect, the control circuit further includes a third switch, a fourth switch, and a third start signal line. The anode of the fourth diode is connected to the fourth input terminal and the fifth input terminal of the third switch. The fourth output terminal of the third switch is connected to the second voltage signal line. The fifth output terminal of the fourth switch is connected to the ground line. The fourth control terminal of the third switch is connected to the third start signal line. The fifth control terminal of the fourth switch is connected to the first start signal line.

[0017] In conjunction with the first aspect, both the first response unit and the second response unit include a first capacitor, a second capacitor, and a pixel unit, wherein the first capacitor and the second capacitor are connected in parallel, and the pixel unit is connected between the first capacitor and the second capacitor.

[0018] In conjunction with the first aspect, the first start signal line outputs a first drive signal; the second start signal line outputs a second drive signal; and the third start signal line outputs a third drive signal; the first drive signal is out of phase with the second drive signal, and the second drive signal is in phase with the third drive signal.

[0019] The first driving signal, the second driving signal, and the third driving signal all include a blank area, in which the phases of the first driving signal, the second driving signal, and the third driving signal are reversed, and the blank area occupies 5-10% of a frame of data.

[0020] Secondly, this application provides a display panel including a driving circuit as described in any one of the first aspects, wherein the driving circuit drives the display panel to display an image when it is in operation.

[0021] One of the above technical solutions has the following advantages or beneficial effects:

[0022] Compared with the prior art, the driving circuit of this application includes: a first response unit and a second response unit arranged in the same direction; a driving signal line extending in the same direction as the arrangement direction of the first and second response units; a selection signal line extending in a direction intersecting the arrangement direction of the first and second response units; and a selection circuit connected to the driving signal line and the selection signal line. The output terminal of the selection circuit is connected to the first and second response units respectively, and the selection circuit selects to interact with either the first or second response unit in response to a selection signal emitted by the selection signal line. The circuit provided in this application connects to the selection circuit via a single driving signal line, and simultaneously connects two response units via a single selection circuit, which can significantly reduce the number of driving signal lines, thereby increasing the aperture ratio of the display panel and thus improving the display brightness of the liquid crystal display. Attached Figure Description

[0023] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0024] Figure 1 This application provides schematic diagrams of the drive circuit structure for some embodiments.

[0025] Figure 2 This is a schematic diagram of the driving circuit structure provided in some other embodiments of this application;

[0026] Figure 3 This is a schematic diagram of the driving circuit structure provided in an embodiment of this application;

[0027] Figure 4 This is a timing diagram of the first drive signal, the second drive signal, and the third drive signal provided in the embodiments of this application. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0029] The specific implementation methods of this application are illustrated below through examples:

[0030] like Figure 1 , Figure 2 and Figure 3As shown, this application embodiment provides a driving circuit, including a first response unit and a second response unit arranged in the same direction, a driving signal line Gate, a selection signal line Data, and a selection circuit. The extension direction of the driving signal line Gate is the same as the arrangement direction of the first and second response units; the extension direction of the selection signal line Data intersects the arrangement direction of the first and second response units; the selection circuit is connected to the driving signal line Gate and the selection signal line Data; wherein, the output terminal of the selection circuit is respectively connected to the first and second response units, and the selection circuit selects to interact with the first or second response unit in response to the selection signal emitted by the selection signal line Data. Specifically, the selection signal line Data is a data signal line used to alternately output positive and negative polarity voltages; there are multiple first and second response units, which are arranged in a row along a first direction X and in a column along a second direction Y, wherein the first direction X and the second direction Y are perpendicular. The first and second response units cooperate in pairs and are respectively connected to the two output terminals of the selection circuit. The selection circuit is connected to the drive signal line Gate. After receiving the drive signal, it enters the working state. Simultaneously, the selection circuit is also connected to the selection signal line Data, which controls the selection circuit by outputting a high or low level selection signal. The selection circuit selects whether to connect to the first or second response unit based on the selection signal. It is important to note that the first and second response units connected to the same selection circuit must be in different columns, but can be in the same row (e.g., ...). Figure 1 (as shown) or in different rows (such as) Figure 2 (As shown). By configuring the selection circuit, the number of drive signal lines (Gates) in a conventional DLS architecture can be reduced, thereby increasing the aperture ratio of the display panel and thus improving the display brightness of the LCD. Simultaneously, for ease of connection, the extension direction of the drive signal lines (Gates) is the same as the arrangement direction of the first and second response units, i.e., extending in the first direction X; the extension direction of the selection signal lines (Data) intersects with, and preferably is perpendicular to, the arrangement direction of the first and second response units, i.e., extending in the second direction Y. By limiting the relationship between the extension directions of the drive signal lines (Gates) and the selection signal lines (Data) and the arrangement direction of the first and second response units, multiple uses for a single line can be achieved, further reducing the usage of drive signal lines (Gates) and selection signal lines (Data).

[0031] In this embodiment, the selection circuit includes a selection transistor T5, a first diode D1, and a second diode D2. The first control terminal of the selection transistor T5 is connected to the drive signal line Gate, the first input terminal of the selection transistor T5 is connected to the selection signal line Data, and the first output terminal of the selection transistor T5 is connected to the anode of the first diode D1 and the cathode of the second diode D2. The cathode of the first diode D1 is connected to the first response unit, and the anode of the second diode D2 is connected to the second response unit. Specifically, the selection transistor T5 has a gate, a drain, and a source, where the gate is the first control terminal, the source is the first input terminal, and the drain is the first output terminal. After the first control terminal of the selection transistor T5 receives the drive signal from the drive signal line Gate, the selection transistor T5 is in the open state, and the selection circuit outputs a high-level selection signal. At this time, the first diode D1 is forward-biased, and the first response unit is connected to the selection transistor T5. When the selection circuit outputs a low-level selection signal, the cathode of the second diode D2 is at a low potential, that is, the second response unit is connected to the selection transistor T5. By selecting the selection transistor T5, the first diode D1, and the second diode D2 in the selection circuit, which are connected to the first response unit and the second response unit respectively under the control of the drive signal and the selection signal, the use of the drive signal line Gate is reduced, the aperture ratio of the display panel is increased, and the display brightness of the liquid crystal display is improved.

[0032] In this embodiment, the driving circuit further includes a control circuit, which includes a third diode D3, a first voltage signal line PVDD, and a ground line GND. The anode of the third diode D3 is connected to the first response unit, and the cathode of the third diode D3 is connected to either the first voltage signal line PVDD or the ground line GND. Specifically, the first voltage signal line PVDD is used to provide a high-voltage signal. When the third diode D3 is connected to the first voltage signal line PVDD, the first diode D1 is connected to the first response unit for interaction. When the third diode D3 is connected to the ground line GND, the first response unit discharges to the ground line GND through the third diode D3. It should be noted that the third diode D3 is selectively connected to the first voltage signal line PVDD and the ground line GND to achieve interaction and discharge of the first response unit, avoiding the situation where the past signal voltage strength in the first response unit is too high, causing subsequent signals to be unable to be input.

[0033] In this embodiment, the driving circuit further includes a control circuit, which includes a fourth diode D4 and a second voltage signal line NVDD. The anode of the fourth diode D4 is connected to either the ground line GND or the second voltage signal line NVDD, and the cathode of the fourth diode D4 is connected to the second response unit. Specifically, the second voltage signal line NVDD is used to provide a low-voltage signal. When the third diode D3 is connected to the second voltage signal line NVDD, the second diode D2 is connected to the second response unit and interacts with it. When the fourth diode D4 is connected to the ground line GND, the second response unit discharges to the ground line GND through the fourth diode D4. It should be noted that the fourth diode D4 is selectively connected to the second voltage signal line NVDD and the ground line GND to achieve interaction and discharge of the second response unit, avoiding the situation where the voltage strength of past signals connected to the second response unit is too high, causing subsequent signals to be unable to be input.

[0034] In this embodiment, the control circuit further includes a first switch T1 and a first start signal line SW1. The second input terminal of the first switch T1 is connected to the cathode of the third diode D3, the second output terminal of the first switch T1 is connected to the ground line GND, and the second control terminal of the first switch T1 is connected to the first start signal line SW1. Specifically, the first switch T1 can perform a switching function. After connecting the first switch T1 between the third diode D3 and the ground line GND, when the first response unit needs to discharge, opening the first switch T1 will connect the first response unit and the ground line GND; when the first response unit needs to work, opening the first switch T1 will disconnect the first response unit from the ground line GND, so that the ground line GND will not affect the normal working state of the first response unit. The first switch T1 is closed and opened through the signal output by the first start signal line SW1.

[0035] In this embodiment, the control circuit further includes a second switch T2 and a second start signal line SW2. The third input terminal of the second switch T2 is connected to the cathode of the third diode D3, the third output terminal of the second switch T2 is connected to the first voltage signal line PVDD, and the third control terminal of the second switch T2 is connected to the second start signal line SW2. Specifically, the second switch T2 can perform a switching function. After connecting the second switch T2 between the third diode D3 and the first voltage signal line PVDD, when the first response unit needs to work, opening the second switch T2 will connect the first response unit and the first voltage signal line PVDD; when the first response unit needs to discharge, opening the second switch T2 will disconnect the first response unit and the first voltage signal line PVDD. The second switch T2 achieves closing and opening through the signal output by the second start signal line SW2. Through the cooperation of the first switch T1 and the second switch T2, the first voltage signal line PVDD can be connected and the ground line GND can be disconnected when the first response unit needs to work, and the ground line GND can be connected and the first voltage signal line PVDD can be disconnected when discharging is required. The second switch T2 is closed and opened by the signal output from the second start signal line SW2.

[0036] In this embodiment, the control circuit further includes a third switch T3, a fourth switch T4, and a third start signal line SW3. The anode of the fourth diode D4 is connected to the fourth input terminal of the third switch T3 and the fifth input terminal of the fourth switch T4. The fourth output terminal of the third switch T3 is connected to the second voltage signal line NVDD. The fifth output terminal of the fourth switch T4 is connected to the ground line GND. The fourth control terminal of the third switch T3 is connected to the third start signal line SW3. The fifth control terminal of the fourth switch T4 is connected to the first start signal line SW1. Specifically, both the third switch T3 and the fourth switch T4 are connected to the cathode of the fourth diode D4. When the third switch T3 is closed and the fourth switch T4 is open, the second response unit is connected to the second voltage signal line NVDD through the fourth diode D4, and the second response unit is in the working state. When the third switch T3 is open and the fourth switch T4 is closed, the second response unit is connected to the ground line GND through the fourth diode D4, and the second response unit is in the discharging state. The third switch T3 is closed and opened by the signal output from the third start signal line SW3, while the fourth switch T4 is closed and opened by the signal output from the first start signal line SW1.

[0037] In the embodiments of this application, the first switch T1, the second switch T2, the third switch T3, the fourth switch T4, and the selection transistor T5 can all be TFTs (Thin Film Transistors). All control terminals mentioned in the first switch T1, the second switch T2, the third switch T3, the fourth switch T4, and the selection transistor T5 are the gates of the transistors, all input terminals are the sources of the transistors, and the output terminal is the drain of the transistors. The transistors can be activated by inputting a control signal to the gate, thereby connecting the source and drain. In some other embodiments of this application, the first switch T1, the second switch T2, the third switch T3, the fourth switch T4, and the selection transistor T5 can also be other components capable of performing switching functions.

[0038] In this embodiment, both the first response unit and the second response unit include a first capacitor C1, a second capacitor C2, and a pixel unit. The first capacitor C1 and the second capacitor C2 are connected in parallel, and the pixel unit is connected between the first capacitor C1 and the second capacitor C2. Specifically, the first response unit and the second response unit are pixel electrodes, and the pixel unit is a liquid crystal molecule. The first capacitor C1 and the second capacitor C2 are used to provide the required electric field for the liquid crystal molecules. When a voltage is applied to the first response unit and the second response unit, the first capacitor C1 and the second capacitor C2 store charge and generate an electric field on the liquid crystal molecules. This electric field affects the alignment direction of the liquid crystal molecules, thereby controlling the degree of light transmission. By adjusting the charge and voltage of the first capacitor C1 and the second capacitor C2, the orientation of the liquid crystal molecules can be precisely controlled, thereby realizing the display of an image.

[0039] like Figure 4 As shown, in this embodiment, the first start signal line SW1 outputs a first drive signal M1; the second start signal line SW2 outputs a second drive signal M2; and the third start signal line SW3 outputs a third drive signal M3. The first drive signal M1 is out of phase with the second drive signal M2, and the second drive signal M2 is in phase with the third drive signal M3. Each of the first drive signal M1, second drive signal M2, and third drive signal M3 includes a blank area, which occupies 5-10% of a frame of data. Specifically, the first drive signal M1 is used to control the closing and opening of the first switch T1 and the fourth switch T4. When the first drive signal M1 is high (e.g., when...),... Figure 4(In the blank area), the first switch T1 and the fourth switch T4 are closed, thereby connecting the ground line GND with the first response unit and the second response unit. When the first drive signal M1 is low, the first switch T1 and the fourth switch T4 are open, thereby disconnecting the ground line GND from the first response unit and the second response unit. The second drive signal M2 is used to control the closing and opening of the second switch T2. When the second drive signal M2 is high, the second switch T2 is closed, thereby connecting the high-level signal line PVDD with the first response unit. When the second drive signal M2 is low (e.g., in the blank area), the first switch T1 and the fourth switch T4 are closed, thereby connecting the ground line GND with the first response unit. Figure 4 (In the blank area), the second switch T2 is open, thereby disconnecting the high-level signal line PVDD from the first response unit; the third drive signal is used to control the closing and opening of the third switch T3. When the third drive signal M3 is high, the third switch T3 is closed, thereby connecting the low-level signal line NVDD to the second response unit. When the third drive signal M3 is low (e.g., in the blank area), the second switch T2 is open, thereby disconnecting the high-level signal line PVDD from the first response unit. Figure 2 (In the blank area), the third switch T3 is turned off, thereby disconnecting the low-level signal line NVDD from the second response unit.

[0040] In this embodiment, the phases of the first driving signal M1, the second driving signal M2, and the third driving signal M3 change in the blank area. That is, the original high-level signal changes to a low-level signal, and the original low-level signal changes to a high-level signal. After the blank area ends, the signal changes back to the original signal. In this embodiment, the blank area occupies 5-10% of a frame of data and is generally at the end of each frame of data.

[0041] This application discloses a display panel including the driving circuit provided in any of the above embodiments. When the driving circuit is working, it drives the display panel to display an image.

[0042] The driving circuit and display panel provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A driving circuit, characterized in that, include: First and second response units arranged in the same direction; A drive signal line, wherein the extension direction of the drive signal line is the same as the arrangement direction of the first response unit and the second response unit; The selection signal line extends in a direction that intersects the arrangement direction of the first response unit and the second response unit; The selection circuit includes a selection transistor, a first diode, and a second diode. The first control terminal of the selection transistor is connected to the drive signal line, the first input terminal of the selection transistor is connected to the selection signal line, and the first output terminal of the selection transistor is connected to the anode of the first diode and the cathode of the second diode. The cathode of the first diode is connected to the first response unit, and the anode of the second diode is connected to the second response unit. The selection circuit selects to interact with either the first response unit or the second response unit in response to a selection signal emitted from the selection signal line. The control circuit includes a third diode and a fourth diode, wherein the anode of the third diode is connected to the first response unit and the cathode of the fourth diode is connected to the second response unit.

2. The driving circuit as described in claim 1, characterized in that, The control circuit further includes a first voltage signal line and a ground line, and the cathode of the third diode is connected to either the first voltage signal line or the ground line.

3. The driving circuit as described in claim 2, characterized in that, The control circuit also includes a second voltage signal line, and the anode of the fourth diode is connected to either the ground line or the second voltage signal line.

4. The driving circuit as described in claim 3, characterized in that, The control circuit further includes a first switch and a first start signal line. The second input terminal of the first switch is connected to the cathode of the third diode, the second output terminal of the first switch is connected to the ground wire, and the second control terminal of the first switch is connected to the first start signal line.

5. The driving circuit as described in claim 4, characterized in that, The control circuit further includes a second switch and a second start signal line. The third input terminal of the second switch is connected to the cathode of the third diode, the third output terminal of the second switch is connected to the first voltage signal line, and the third control terminal of the second switch is connected to the second start signal line.

6. The driving circuit as described in claim 5, characterized in that, The control circuit further includes a third switch, a fourth switch, and a third start signal line. The anode of the fourth diode is connected to the fourth input terminal and the fifth input terminal of the third switch. The fourth output terminal of the third switch is connected to the second voltage signal line. The fifth output terminal of the fourth switch is connected to the ground line. The fourth control terminal of the third switch is connected to the third start signal line. The fifth control terminal of the fourth switch is connected to the first start signal line.

7. The driving circuit as described in claim 1, characterized in that, Both the first response unit and the second response unit include a first capacitor, a second capacitor, and a pixel unit. The first capacitor and the second capacitor are connected in parallel, and the pixel unit is connected between the first capacitor and the second capacitor.

8. The driving circuit as described in claim 6, characterized in that, The first start signal line outputs a first drive signal; the second start signal line outputs a second drive signal; the third start signal line outputs a third drive signal; the first drive signal is out of phase with the second drive signal, and the second drive signal is in phase with the third drive signal. The first driving signal, the second driving signal, and the third driving signal all include a blank area, which occupies 5-10% of a frame of data.

9. A display panel, characterized in that, The device includes a driving circuit as described in any one of claims 1-8, which drives the display panel to display an image when it is in operation.

Images