Drive control circuit, drive control method, signal processing circuit, and display device

Abstract

The present application discloses a driving control circuit, a driving control method, a signal processing circuit and a display device, wherein the driving control circuit comprises: a detection circuit for detecting the internal current direction of each driving circuit to generate a first polarity feedback signal or a second polarity feedback signal; a main control circuit for receiving the first polarity feedback signal and / or the second polarity feedback signal sent by the detection circuit, and when the difference between the first polarity feedback signal and the second polarity feedback signal is not less than 2, sending a polarity change instruction to at least one driving circuit corresponding to the larger one of the first polarity feedback signal and the second polarity feedback signal, so that the internal current direction of the driving circuit receiving the polarity change instruction is changed to the opposite current direction. In the above manner, the driving control circuit in the present application can ensure the balance of the internal charge of the display panel as much as possible when the display panel is running, so as to effectively reduce power consumption and improve the stability of the external terminal voltage of each driving circuit.

Description

Technical Field

[0001] The present application relates to the technical field of display panels, and in particular, to a driving control circuit, a driving control method, a signal processing circuit, and a display device. Background Art

[0002] In the performance evaluation during the use of a display panel, power consumption and heat generation characteristics are usually important factors that cannot be avoided. Especially when the display panel is in a standby or paused state, how to make the display panel maintain a low power consumption operation becomes a key factor.

[0003] However, the existing means of reducing the power consumption of the display panel mainly include reducing the load of the product itself or reducing the power consumption through a scheme of adjusting the duty ratio of the control signal. However, this will more or less affect the display quality of the display panel, and the control scheme is relatively complex. Summary of the Invention

[0004] The main technical problem to be solved by the present application is to provide a driving control circuit, a driving control method, a signal processing circuit, and a display device, which can solve the problem that the means of reducing the power consumption of the display panel in the prior art will more or less affect the display quality of the display panel, and the control scheme is relatively complex.

[0005] To solve the above technical problem, a technical solution adopted by the present application is: to provide a driving control circuit for a display panel. The driving control circuit includes: a detection circuit, coupled to at least two external driving circuits, for detecting the internal current direction of each driving circuit to generate a first polarity feedback signal or a second polarity feedback signal; wherein the first polarity feedback signal and the second polarity feedback signal respectively correspond to two opposite current directions; a main control circuit, coupled to the detection circuit and each driving circuit, to receive the first polarity feedback signal and / or the second polarity feedback signal sent by the detection circuit, and when the difference in the number between the first polarity feedback signal and the second polarity feedback signal is not less than 2, send a polarity change instruction to at least one driving circuit corresponding to the larger value of the first polarity feedback signal and the second polarity feedback signal, so that the internal current direction of the driving circuit receiving the polarity change instruction changes to the opposite current direction.

[0006] Wherein, the difference between the first quantity of the internal current directions of at least two driving circuits after the polarity change being the first polarity direction and the second quantity of the internal current directions being the second polarity direction does not exceed the value 1.

[0007] Wherein, the detection circuit is coupled between each driving circuit and an external power supply circuit, to generate the first polarity feedback signal when the power supply circuit sends a first current signal to the driving circuit, and generate the second polarity feedback signal when the driving circuit sends a second current signal to the power supply circuit.

[0008] Among them, the detection circuit includes at least two detection resistors and at least two voltage comparators. Each detection resistor is coupled between a power supply circuit and a driving circuit. Each voltage comparator is coupled to opposite ends of a detection resistor and is coupled to the main control circuit to compare the voltage values at opposite ends of each detection resistor to generate a first polarity feedback signal or a second polarity feedback signal.

[0009] Among them, when the main control circuit detects that the duration for at least two driving circuits to send the same driving signal to the external display panel exceeds a set time threshold, and the quantity difference between the first polarity feedback signal and the second polarity feedback signal is not less than 2, the main control circuit sends a polarity change instruction to at least one driving circuit corresponding to the one with a larger value among the first polarity feedback signal and the second polarity feedback signal.

[0010] Among them, the set time threshold is not less than the duration corresponding to two frames of display pictures of the display panel.

[0011] To solve the above technical problems, another technical solution adopted in this application is: to provide a driving control method for a display panel. Among them, the driving control method includes: detecting the internal current direction of each driving circuit to generate a first polarity feedback signal or a second polarity feedback signal; where the number of driving circuits is at least two, and the first polarity feedback signal and the second polarity feedback signal respectively correspond to two opposite current directions; in response to the quantity difference between the first polarity feedback signal and the second polarity feedback signal being not less than 2, sending a polarity change instruction to at least one driving circuit corresponding to the one with a larger value among the first polarity feedback signal and the second polarity feedback signal, so that the internal current direction of the driving circuit receiving the polarity change instruction is changed to the opposite current direction.

[0012] After the step of detecting the internal current direction of each driving circuit to generate a first polarity feedback signal or a second polarity feedback signal, and before the step of sending a polarity change instruction to at least one driving circuit corresponding to the larger one of the first polarity feedback signal and the second polarity feedback signal to change the internal current direction of the driving circuit receiving the polarity change instruction to the opposite current direction in response to the difference in the number between the first polarity feedback signal and the second polarity feedback signal being not less than 2, the method further includes: detecting whether the duration for at least two driving circuits to send the same driving signal to the display panel exceeds a set time threshold; the step of sending a polarity change instruction to at least one driving circuit corresponding to the larger one of the first polarity feedback signal and the second polarity feedback signal to change the internal current direction of the driving circuit receiving the polarity change instruction to the opposite current direction in response to the difference in the number between the first polarity feedback signal and the second polarity feedback signal being not less than 2 includes: in response to the duration for at least two driving circuits to send the same driving signal to the display panel exceeding the set time threshold and the difference in the number between the first polarity feedback signal and the second polarity feedback signal being not less than 2, sending a polarity change instruction to at least one driving circuit corresponding to the larger one of the first polarity feedback signal and the second polarity feedback signal to change the internal current direction of the driving circuit receiving the polarity change instruction to the opposite current direction.

[0013] To solve the above technical problems, another technical solution adopted by the present application is: providing a signal processing circuit for a display panel, wherein the signal processing circuit includes: at least two driving circuits, coupled to an external display panel, for sending driving signals to the display panel to drive the display panel to display an image; a driving control circuit, including a detection circuit and a main control circuit, the detection circuit is coupled to at least two driving circuits for detecting the internal current direction of each driving circuit to generate a first polarity feedback signal or a second polarity feedback signal; wherein the first polarity feedback signal and the second polarity feedback signal respectively correspond to two opposite current directions; the main control circuit is coupled to the detection circuit and each driving circuit to receive the first polarity feedback signal and / or the second polarity feedback signal sent by the detection circuit, and when the difference in the number between the first polarity feedback signal and the second polarity feedback signal is not less than 2, sending a polarity change instruction to at least one driving circuit corresponding to the larger one of the first polarity feedback signal and the second polarity feedback signal to change the internal current direction of the driving circuit receiving the polarity change instruction to the opposite current direction.

[0014] To solve the above technical problems, another technical solution adopted by the present application is: providing a display device, wherein the display device includes a display panel and a signal processing circuit coupled to each other; wherein the signal processing circuit is the signal processing circuit described in any one of the above.

[0015] The beneficial effect of the present application is as follows: Different from the prior art, the detection circuit in the driving control circuit of the display panel provided by the present application is used to detect the internal current direction of each driving circuit to generate a first polarity feedback signal or a second polarity feedback signal, so that when the main control circuit receives the first polarity feedback signal and / or the second polarity feedback signal sent by the detection circuit, and when the quantity difference between the first polarity feedback signal and the second polarity feedback signal is not less than 2, a polarity change instruction can be sent to at least one driving circuit corresponding to the larger one of the first polarity feedback signal and the second polarity feedback signal, so that the internal current direction of the driving circuit receiving the polarity change instruction is changed to the opposite current direction, thereby reducing the quantity difference between different driving circuits corresponding to different internal current directions as much as possible, so as to reduce the total current outputted by each driving circuit to the display panel, that is, by ensuring the balance of the internal charge of the display panel as much as possible during display operation, it is not necessary to draw load from the front-end power supply circuit, so as to effectively reduce the power consumption of the display panel and improve the stability of the external terminal voltage of each driving circuit. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 1 is a structural schematic diagram of a first embodiment of a signal processing circuit for a display panel of the present application;

[0018] Figure 2 yes Figure 1 A schematic diagram showing the principle of the current direction inside the driving circuit in the signal processing circuit;

[0019] Figure 3 yes Figure 1 A schematic diagram of the current polarity of each driving circuit in the signal processing circuit before adjustment;

[0020] Figure 4 yes Figure 1 A schematic diagram of the current polarity of each driving circuit in the signal processing circuit after adjustment;

[0021] Figure 5 is a structural schematic diagram of a second embodiment of a signal processing circuit for a display panel of the present application;

[0022] Figure 6 It is a flow chart of a first implementation method of a driving control method of a display panel of the present application;

[0023] Figure 7It is a schematic flowchart of the second embodiment of the driving control method of the display panel of the present application;

[0024] Figure 8 It is a schematic structural diagram of an embodiment of the display device of the present application.

[0025] Among them, 10 / 20 / 52 is the signal processing circuit; 11 / 21 is the driving circuit; 12 / 22 is the driving control circuit; 101 / 51 is the display panel; 121 / 221 is the detection circuit; 122 / 222 is the main control circuit; 2211 is the detection resistor; 2212 is the voltage comparator; 23 is the power supply circuit; 50 is the display device. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0027] The terms "first", "second", and "third" in the present application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", and "third" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products, or devices.

[0028] Referring to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0029] The present application will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a first embodiment of the signal processing circuit of a display panel. In this embodiment, the signal processing circuit 10 includes: at least two driving circuits 11 and a driving control circuit 12.

[0031] Among them, the signal processing circuit 10 can be specifically understood as a processing circuit for various signals such as voltages and currents involved in driving the display panel 101 to perform screen display, so as to process each signal and output it to the display panel 101, enabling the display panel 101 to achieve corresponding screen display.

[0032] Specifically, at least two driving circuits 11 are independently coupled to the external display panel 101 to provide driving signals to the display panel 101 and drive the display panel 101 to perform screen display through the driving signals.

[0033] It should be noted that "coupled" herein includes any direct and indirect connection means. Therefore, if it is described in the text that the first element is coupled to the second element, it means that the first element can be directly connected to the second element through signal connection means such as electrical connection, communication connection, wireless transmission, optical transmission, or indirectly electrically or signal-connected to the second element through other elements or connection means.

[0034] And each of the driving circuits 11 can specifically correspond to being coupled to a plurality of data lines in the display panel 101 to send corresponding driving signals to the light-emitting units in the display panel 101 through each data line to make them emit light.

[0035] Moreover, the number of the driving circuits 11 in the signal processing circuit 10 is specifically determined by the characteristic parameters of the display panel 101, such as the total number of data lines in the display panel 101 and the number of data lines corresponding to each driving circuit 11 set to ensure the required display quality of the product. The present application does not limit this.

[0036] Among them, the driving control circuit 12 further specifically includes a detection circuit 121 and a main control circuit 122. The detection circuit 121 is coupled to at least two driving circuits 11 to detect the internal current direction of each driving circuit 11, such as detecting the current transmission direction between any two reasonable connection endpoints inside each driving circuit 11, or the current transmission direction between it and any reasonable external circuit, so as to correspondingly generate a first polarity feedback signal or a second polarity feedback signal.

[0037] It is understandable that, based on the characteristics of the current direction in the circuit, the first polarity feedback signal and the second polarity feedback signal respectively correspond to two opposite current directions; and each driving circuit 11 will correspondingly have a current direction, so that the detection circuit 121 can detect the first polarity feedback signal or the second polarity feedback signal.

[0038] Furthermore, the main control circuit 122 is correspondingly coupled to the detection circuit 121 and each driving circuit 11 to receive all the first polarity feedback signals and / or second polarity feedback signals sent by the detection circuit 121, and further accumulate the first quantity of the currently received first polarity feedback signals and the second quantity of the second polarity feedback signals.

[0039] Among them, when the difference in the quantity between the current first polarity feedback signal and the second polarity feedback signal, that is, the absolute value of the difference obtained by subtracting the second quantity from the first quantity is not less than 2, the main control circuit 122 sends a polarity change instruction to at least one driving circuit 11 corresponding to the larger one of the first polarity feedback signal and the second polarity feedback signal. For example, when the first quantity is larger, a polarity change instruction is sent to at least one of all the driving circuits 11 corresponding to the first polarity feedback signal, so that the internal current direction of the driving circuit 11 receiving the polarity change instruction changes to the opposite current direction.

[0040] Please continue to refer to Figures 2 - 4 , where Figure 2 is Figure 1 a schematic diagram of the principle of adjusting the internal current direction of the driving circuit 11 in the adjustment circuit in Figure 3 is Figure 1 a schematic diagram of the current polarities of the respective driving circuits 11 in the adjustment circuit before adjustment in Figure 4 is Figure 1 a schematic diagram of the current polarities of the respective driving circuits 11 in the adjustment circuit after adjustment in

[0041] It should be noted that when the display panel 101 is working normally, in order to prevent the liquid crystal of the product from polarizing, polarity switching is usually performed. When the driving circuit 11 is of positive polarity, the internal current direction will be VAA - HVAA. Among them, the VAA and HVAA can specifically correspond to two connection endpoints of the power supply circuit that provides working power to each driving circuit 11, so there will be a sink current (inrush current) of HVAA; when the driving circuit 11 is of negative polarity, the internal current direction will be HVAA - GND, thus generating a source current (pull current) of HVAA.

[0042] When the display panel 101 displays complex pictures, positive and negative polarities will exist simultaneously at the edges of the display areas corresponding to the respective driving circuits 11. A current balance will be achieved inside each individual driving circuit 11, and then it will be fed back whether it is a sink current or a source current. Therefore, from the perspective of the entire display panel 101, the current states fed back by each driving circuit 11 are inconsistent. When adjusting to achieve current balance for the HVAA of the entire display panel 101, the stability of the output voltage of the power supply circuit can be effectively improved.

[0043] Sink current: When the output is at a low level, generally the output terminal needs to absorb the current of the load, and the value of the absorbed current is called "sinking current". For a device with input current, the external current flowing into the chip through the chip pin is called sinking current (being sunk).

[0044] Source current: When the output is at a high level, generally the output terminal provides current to the load, and the value of the provided current is called "pull current". For a device with input current, the internal current flowing out of the chip through the chip pin is called pull current (being pulled out).

[0045] For easy understanding, assume that the number of driving circuits 11 in the signal processing circuit 10 is specifically 3, denoted as COF1, COF2, and COF3; and the detection circuit 121 specifically includes 3 detection sub-units, denoted as ZC1, ZC2, and ZC3; the main control circuit 122 is denoted as TCON. Among them, ZC1, ZC2, and ZC3 are respectively used to detect the current directions inside COF1, COF2, and COF3 at present, so as to determine whether the corresponding HVAA1, HVAA2, and HVAA3 are sink currents or source currents, and generate FK1, FK2, and FK3 respectively. And the FK1, FK2, and FK3 are specifically positioned as the first polarity feedback signal or the second polarity feedback signal. Taking the first polarity feedback signal denoted as H and the second polarity feedback signal denoted as L as an example, it can be known that when COF1, COF2, and COF3 corresponding to the same Frame (video frame) of the display panel 101 are HHH or LLL, the total current at the HVAA end point corresponding to the power supply circuit will be 3*Isink or 3*Isource. The current load is large, the output ability of the front end is poor, and the voltage stability is also poor.

[0046] When changing the same Frame to correspond to HLH or LHL, COF1 and COF2 will achieve current balance without drawing current (or neutralizing a part, and the current will decrease) from the front end, that is, the power supply circuit. At this time, the total current at HVAA will be 1*Isink or 1*Isource. That is, compared with the previous solution, the current demand will be reduced to 1 / 3 of the original, and the terminal voltage under current drawing will also be improved synchronously and stably.

[0047] It should be noted that, as Figure 1 shown, the COF specifically refers to a chip-on-film. A source driver chip is specifically provided on the COF to be able to transmit signals to the display panel 101 through the source driver chip. And on the COF, that is, on the sides of COF1, COF2, and COF3 away from the display panel 101, a circuit board is specifically provided. The detection circuits 121, that is, ZC1, ZC2, and ZC3, are specifically arranged on the circuit board. The circuit board is specifically connected to the display panel 101 through COF1, COF2, and COF3. A main control board is also spaced in the direction away from the display panel 101 on the circuit board. The main control circuit 122, that is, TCON, also called a timing controller, is specifically arranged on the main control board.

[0048] Generally speaking, multiple COFs will be correspondingly used in the display panel 101. Especially for large-size panels, more COFs are usually used. That is, in other embodiments, the number of driving circuits 11 in the signal processing circuit 10 can specifically also be any reasonable number such as 6, 8, or 12, etc. And the corresponding polarity feedback signals can specifically also correspond to any reasonable states such as HLLLLH, LLLLLL, or HHLLLH, etc. Details are not described one by one here. After changing the internal current direction of at least one of the driving circuits 11 corresponding to the polarity feedback signals with a larger number to the opposite current direction, it can be closer to achieving current balance among the driving circuits 11 in the signal processing circuit 10, thereby effectively reducing the current demand for the front-end power supply circuit.

[0049] It can be understood that in the most ideal state, when the number of driving circuits 11 in the signal processing circuit 10 is an even number, it can effectively adjust the number of driving circuits 11 corresponding to the first polarity feedback signal and the second polarity feedback signal to be the same to achieve complete current balance; when the number of driving circuits 11 in the signal processing circuit 10 is an odd number, the difference in the number between the two is ensured to be 1 to minimize the current demand for the front-end power supply circuit as much as possible; but in order to ensure that changing the internal current direction of the driving circuits 11 does not affect the display effect at the same time, specifically, the number of driving circuits 11 less than that corresponding to the ideal state can be adjusted, which is specifically determined by the actual application scenario, and the present application does not make any limitation in this regard.

[0050] The above scheme sends a polarity change instruction to at least one driving circuit 11 corresponding to the larger one of the first polarity feedback signal and the second polarity feedback signal, so that the internal current direction of the driving circuit 11 that receives the polarity change instruction is changed to the opposite current direction, thereby reducing the number difference between different driving circuits 11 corresponding to different internal current directions as much as possible, so as to reduce the total current outputted by each driving circuit 11 to the display panel 101, that is, by ensuring the balance of the internal charge of the display panel 101 as much as possible when the display is running, there is no need to draw load from the front-end power supply circuit, so as to effectively reduce the power consumption of the display panel 101 and improve the stability of the external terminal voltage of each driving circuit 11.

[0051] In one embodiment, in the signal processing circuit 10, the difference between a first number of at least two driving circuits 11 whose internal current directions are in a first polarity direction after the polarity change and a second number of at least two driving circuits 11 whose internal current directions are in a second polarity direction does not exceed a value of 1, that is, after detecting and feedback of the internal current directions of at least two driving circuits 11 after the polarity change, the absolute value of the difference between the first number and the second number is equal to 0 or 1.

[0052] It can be understood that, in the most ideal state, when the number of driving circuits 11 in the signal processing circuit 10 is an even number, the number of driving circuits 11 corresponding to the first polarity feedback signal and the second polarity feedback signal can be effectively adjusted to be consistent to achieve complete current balance; and when the number of driving circuits 11 in the signal processing circuit 10 is an odd number, the difference between the two is ensured to be 1, so as to minimize the current demand on the front-end power supply circuit; but in order to ensure that the change of the internal current direction of the driving circuit 11 does not affect the display effect, it is also possible to adjust only the number of driving circuits 11 corresponding to the ideal state, which is determined by the actual application scenario and is not limited in this application.

[0053] In one embodiment, the detection circuit 121 is specifically coupled between each driving circuit 11 and an external power supply circuit, so that when the power supply circuit sends a first current signal to the driving circuit 11, the detection circuit 121 can generate a first polarity feedback signal accordingly, and when the driving circuit 11 sends a second current signal to the power supply circuit, the detection circuit 121 can generate a second polarity feedback signal accordingly.

[0054] In one embodiment, when the main control circuit 122 in the drive control circuit 12 detects that the duration for which at least two drive circuits 11 send the same drive signal to the external display panel 101 exceeds a set time threshold, that is, the duration for which the current displayed image on the display panel 101 remains unchanged exceeds the set time threshold and the display panel 101 is in a standby or paused state, and at the same time the difference in the number between the first polarity feedback signal and the second polarity feedback signal is not less than 2, it then sends a polarity change instruction to at least one drive circuit 11 corresponding to the one with the larger value among the first polarity feedback signal and the second polarity feedback signal, so as to avoid affecting the current display effect of the display panel 101 when the display panel 101 is working properly by sending a polarity change instruction to some of the drive circuits 11.

[0055] Optionally, the set time threshold is specifically not less than any reasonable duration corresponding to 2 frames of the display image of the display panel 101, and the present application does not limit this.

[0056] It should be noted that the duration corresponding to 1 frame of the display image of the display panel 101 is specifically determined by the characteristic parameters of the display panel 101, such as the resolution, etc.

[0057] Please continue to refer to Figure 5 , Figure 5 FIG. is a schematic structural diagram of a second embodiment of the signal processing circuit of the display panel of the present application. The difference between the signal processing circuit in this embodiment and the first embodiment of the signal processing circuit provided by the present application is that the detection circuit 221 in the drive control circuit 22 of the signal processing circuit 20 further specifically includes at least two detection resistors 2211 and at least two voltage comparators 2212.

[0058] In one embodiment, the signal processing circuit 20 further specifically includes a power supply circuit 23.

[0059] Wherein, each detection resistor 2211 is specifically coupled between the power supply circuit 23 and a drive circuit 21, and each voltage comparator 2212 is coupled to opposite ends of a detection resistor 2211 and further coupled to the main control circuit 222, so as to compare the magnitudes of the voltage values at opposite ends of each detection resistor 2211 and generate a first polarity feedback signal or a second polarity feedback signal according to the comparison result.

[0060] For ease of understanding, assume that the detection circuit 221 specifically includes n (n is an integer greater than 1) detection resistors 2211, n voltage comparators 2212, and n driving circuits 21, which are respectively denoted as R1, R2 (not shown in the figure),..., Rn (not shown in the figure), comparator 1, comparator 2,..., comparator n, and COF1, COF2,..., COFn. The feedback signals respectively fed back by the n voltage comparators 2212 to the n driving circuits 21 are denoted as FK1, FK2,..., FKn. Then, it can be known that when comparator 1 recognizes the voltage at points A / B and gets A > B, then FK1 = H (sink current); if A < B, then FK1 = L (source current). After feeding the detected FK1, FK2,..., FKn back to the main control circuit 222, that is, the TCON, the TCON can obtain the working state of each driving circuit 21. After internal comparison processing by the TCON, when it recognizes that the difference between the first quantity of H and the second quantity of L corresponding to COF1, COF2,..., COFn in the same Frame of the display panel 101 is not less than 2, the TCON can issue a POL (polarity change) instruction to the corresponding driving circuit 21 through a P2P (point-to-point) signal in the Blank area, so as to achieve a relative balance of the H / L states in the same Frame.

[0061] It can be understood that in this embodiment, the driving circuit 21 and the main control circuit 222 are the same as the driving circuit 11 and the main control circuit 122 respectively. For details, please refer to Figures 1 - 4 and the relevant text content, which will not be elaborated here.

[0062] The present application also provides a driving control method for a display panel. Please refer to Figure 6 , Figure 6 which is a schematic flowchart of the first implementation manner of the driving control method for the display panel of the present application. Specifically, it may include the following steps:

[0063] S31: Detect the internal current direction of each driving circuit to generate a first polarity feedback signal or a second polarity feedback signal.

[0064] It can be understood that the driving control method for the display panel in this implementation manner is specifically a method in which a driving control circuit cooperates with an external driving circuit to drive and control the display panel. Among them, the driving control circuit specifically includes: a detection circuit and a main control circuit; wherein, the detection circuit is coupled to at least two external driving circuits, and the main control circuit is coupled to the detection circuit and each driving circuit.

[0065] Specifically, the drive control circuit detects the internal current direction of each drive circuit through its detection circuit. For example, it detects the current transmission direction between any two reasonable connection endpoints inside each drive circuit, or the current transmission direction between it and any reasonable external circuit, so as to correspondingly generate a first polarity feedback signal or a second polarity feedback signal.

[0066] Among them, the number of drive circuits is at least two, and the first polarity feedback signal and the second polarity feedback signal respectively correspond to two opposite current directions.

[0067] S32: When the difference in the number between the first polarity feedback signal and the second polarity feedback signal is not less than 2, send a polarity change instruction to at least one drive circuit corresponding to the one with the larger value among the first polarity feedback signal and the second polarity feedback signal, so that the internal current direction of the drive circuit receiving the polarity change instruction changes to the opposite current direction.

[0068] Furthermore, the main control circuit receives all the first polarity feedback signals and / or second polarity feedback signals sent by the detection circuit, and further accumulates to obtain the first number of the currently received first polarity feedback signals and the second number of the second polarity feedback signals.

[0069] Among them, the main control circuit specifically sends a polarity change instruction to at least one drive circuit corresponding to the one with the larger value among the first polarity feedback signal and the second polarity feedback signal when the difference in the number between the currently received first polarity feedback signal and the second polarity feedback signal, that is, the absolute value of the difference between the first number and the second number, is not less than 2. For example, when the first number is larger, send a polarity change instruction to at least one of all the drive circuits corresponding to the first polarity feedback signal, so that the internal current direction of the drive circuit receiving the polarity change instruction changes to the opposite current direction.

[0070] Please refer to Figure 7 , Figure 7 which is a schematic flowchart of the second embodiment of the drive control method for the display panel of the present application. The drive control method of this embodiment is Figure 6 a schematic flowchart of a refined embodiment of the drive control method in

[0071] S41: Detect the internal current direction of each drive circuit to generate a first polarity feedback signal or a second polarity feedback signal.

[0072] Among them, S41 is the same as Figure 6 S31 in

[0073] S42: Detect whether the duration for which at least two driving circuits send the same driving signal to the display panel exceeds a set time threshold.

[0074] Specifically, the main control circuit in the driving control circuit first detects whether the duration for which at least two driving circuits send the same driving signal to the display panel exceeds a set time threshold, so as to determine whether the display panel is currently in a standby or paused state.

[0075] Optionally, the set time threshold is specifically any reasonable duration not less than the duration corresponding to two frames of display images of the display panel, and the present application does not make a limitation in this regard.

[0076] Among them, if the duration for which at least two driving circuits send the same driving signal to the display panel does not exceed the set time threshold, then execute S43; if the duration for which at least two driving circuits send the same driving signal to the display panel exceeds the set time threshold, then execute S44.

[0077] S43: Send a display control signal to each driving circuit.

[0078] Among them, when the main control circuit determines that the display panel is not currently in a standby or paused state, it normally sends a display control signal to each driving circuit, that is, does not change the polarity of the internal current direction of the driving circuit, so that the display panel performs normal image display.

[0079] S44: Detect whether the quantity difference between the first polarity feedback signal and the second polarity feedback signal is less than 2.

[0080] Further, the main control circuit in the driving control circuit receives all the first polarity feedback signals and / or second polarity feedback signals sent by the detection circuit, and further accumulates to obtain the first quantity of the currently received first polarity feedback signals and the second quantity of the second polarity feedback signals, so as to determine whether the absolute value of the difference between the first quantity and the second quantity is not less than 2.

[0081] Among them, if the quantity difference between the first polarity feedback signal and the second polarity feedback signal is less than 2, then execute S43; if the quantity difference between the first polarity feedback signal and the second polarity feedback signal is not less than 2, then execute S45.

[0082] S45: Send a polarity change instruction to at least one driving circuit corresponding to the one with the larger value among the first polarity feedback signal and the second polarity feedback signal, so that the internal current direction of the driving circuit receiving the polarity change instruction changes to the opposite current direction.

[0083] It can be understood that the main control circuit specifically sends a polarity change instruction to at least one drive circuit corresponding to the larger one of the first polarity feedback signal and the second polarity feedback signal when it is determined that the duration for which at least two drive circuits send the same drive signal to the display panel exceeds a set time threshold and that the quantitative difference between the first polarity feedback signal and the second polarity feedback signal is not less than 2, so as to change the internal current direction of the drive circuit that receives the polarity change instruction to the opposite current direction.

[0084] The present application also provides a display device, see Figure 8 , Figure 8 1 is a schematic diagram of a display device according to an embodiment of the present invention. In this embodiment, the display device 50 includes a display panel 51 and a signal processing circuit 52 coupled to each other.

[0085] The signal processing circuit 52 described in this embodiment is the signal processing circuit 10 or the signal processing circuit 20 described in any one of the above embodiments. Figures 1 - 5 And the related text descriptions will not be repeated here.

[0086] The beneficial effect of the present application is as follows: Different from the prior art, the detection circuit in the driving control circuit of the display panel provided by the present application is used to detect the internal current direction of each driving circuit to generate a first polarity feedback signal or a second polarity feedback signal, so that when the main control circuit receives the first polarity feedback signal and / or the second polarity feedback signal sent by the detection circuit, and when the quantity difference between the first polarity feedback signal and the second polarity feedback signal is not less than 2, a polarity change instruction can be sent to at least one driving circuit corresponding to the larger one of the first polarity feedback signal and the second polarity feedback signal, so that the internal current direction of the driving circuit receiving the polarity change instruction is changed to the opposite current direction, thereby reducing the quantity difference between different driving circuits corresponding to different internal current directions as much as possible, so as to reduce the total current outputted by each driving circuit to the display panel, that is, by ensuring the balance of the internal charge of the display panel as much as possible during display operation, it is not necessary to draw load from the front-end power supply circuit, so as to effectively reduce the power consumption of the display panel and improve the stability of the external terminal voltage of each driving circuit.

[0087] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, 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 driving control circuit for a display panel, characterized in that, The driving control circuit includes: a detection circuit, coupled to at least two driving circuits outside, for detecting the internal current direction of each of the driving circuits to generate a first polarity feedback signal or a second polarity feedback signal; wherein, the first polarity feedback signal and the second polarity feedback signal respectively correspond to two opposite current directions; a main control circuit, coupled to the detection circuit and each of the driving circuits, to receive the first polarity feedback signal and / or the second polarity feedback signal sent by the detection circuit, and when the quantity difference between the first polarity feedback signal and the second polarity feedback signal is not less than 2, send a polarity change instruction to at least one of the driving circuits corresponding to the one with the larger value among the first polarity feedback signal and the second polarity feedback signal, so that the internal current direction of the driving circuit receiving the polarity change instruction is changed to the opposite current direction.

2. The driving control circuit according to claim 1, wherein the difference between the first quantity of the internal current directions of at least two of the driving circuits after polarity change being the first polarity direction and the second quantity of the internal current directions being the second polarity direction does not exceed the value 1.

3. The driving control circuit according to claim 1, wherein the detection circuit is coupled between each of the driving circuits and an external power supply circuit, to generate the first polarity feedback signal when the power supply circuit sends a first current signal to the driving circuit, and generate the second polarity feedback signal when the driving circuit sends a second current signal to the power supply circuit.

4. The driving control circuit according to claim 3, wherein the detection circuit includes at least two detection resistors and at least two voltage comparators, each of the detection resistors is coupled between the power supply circuit and a driving circuit, each of the voltage comparators is coupled to opposite ends of a detection resistor and is coupled to the main control circuit, to compare the voltage values at opposite ends of each detection resistor to generate the first polarity feedback signal or the second polarity feedback signal.

5. The driving control circuit according to claim 1, wherein when the main control circuit detects that the duration of at least two of the driving circuits sending the same driving signal to an external display panel exceeds a set time threshold, and the quantity difference between the first polarity feedback signal and the second polarity feedback signal is not less than 2, it sends a polarity change instruction to at least one of the driving circuits corresponding to the one with the larger value among the first polarity feedback signal and the second polarity feedback signal.

6. The driving control circuit according to claim 5, wherein the set time threshold is not less than the duration corresponding to 2 frames of display pictures of the display panel.

7. A driving control method for a display panel, characterized in that The driving control method includes: detecting the internal current direction of each driving circuit to generate a first polarity feedback signal or a second polarity feedback signal; wherein, the number of the driving circuits is at least two, and the first polarity feedback signal and the second polarity feedback signal respectively correspond to two opposite current directions; When the quantity difference between the first polarity feedback signal and the second polarity feedback signal is not less than 2, send a polarity change instruction to at least one of the drive circuits corresponding to the one with the larger value among the first polarity feedback signal and the second polarity feedback signal, so that the internal current direction of the drive circuit receiving the polarity change instruction is changed to the opposite current direction.

8. The drive control method according to claim 7, wherein After the step of detecting the internal current direction of each drive circuit to generate the first polarity feedback signal or the second polarity feedback signal, and before the step of, when the quantity difference between the first polarity feedback signal and the second polarity feedback signal is not less than 2, sending a polarity change instruction to at least one of the drive circuits corresponding to the one with the larger value among the first polarity feedback signal and the second polarity feedback signal, so that the internal current direction of the drive circuit receiving the polarity change instruction is changed to the opposite current direction, further includes: Detect whether the continuous duration of at least two of the drive circuits sending the same drive signal to the display panel exceeds a set time threshold; The step of, when the quantity difference between the first polarity feedback signal and the second polarity feedback signal is not less than 2, sending a polarity change instruction to at least one of the drive circuits corresponding to the one with the larger value among the first polarity feedback signal and the second polarity feedback signal, so that the internal current direction of the drive circuit receiving the polarity change instruction is changed to the opposite current direction includes: When the continuous duration of at least two of the drive circuits sending the same drive signal to the display panel exceeds the set time threshold, and the quantity difference between the first polarity feedback signal and the second polarity feedback signal is not less than 2, send a polarity change instruction to at least one of the drive circuits corresponding to the one with the larger value among the first polarity feedback signal and the second polarity feedback signal, so that the internal current direction of the drive circuit receiving the polarity change instruction is changed to the opposite current direction.

9. A signal processing circuit for a display panel, characterized in that, The signal processing circuit includes: At least two drive circuits, coupled to an external display panel, for sending drive signals to the display panel to drive the display panel to perform screen display; A drive control circuit, including a detection circuit and a main control circuit, the detection circuit is coupled to at least two of the drive circuits, and is used for detecting the internal current direction of each drive circuit to generate a first polarity feedback signal or a second polarity feedback signal; wherein, the first polarity feedback signal and the second polarity feedback signal respectively correspond to two opposite current directions; The main control circuit is coupled to the detection circuit and each of the driving circuits to receive the first polarity feedback signal and / or the second polarity feedback signal sent by the detection circuit, and when the numerical difference between the first polarity feedback signal and the second polarity feedback signal is not less than 2, send a polarity change instruction to at least one of the driving circuits corresponding to the one with the larger value among the first polarity feedback signal and the second polarity feedback signal, so that the internal current direction of the driving circuit receiving the polarity change instruction is changed to the opposite current direction.

10. A display device, characterized in that, The display device includes a display panel and a signal processing circuit that are coupled to each other; Wherein, the signal processing circuit is the signal processing circuit according to any one of claims 9.

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