Display control circuit, display module and display device

Abstract

The application provides a display control circuit, a display module and a display device. The display control circuit comprises a controller and a voltage output circuit which are electrically connected. The display control circuit further comprises a voltage control circuit, one end of the voltage control circuit being electrically connected to the voltage output circuit, and the other end of the voltage control circuit being electrically connected to a display panel. The controller is used for detecting a frequency difference between a current frame and a next frame of a display picture of the display panel, and controlling the voltage control circuit according to the frequency difference, so that the voltage control circuit controls the voltage output circuit to continuously increase or decrease an output voltage to a target voltage in a time of the next frame to drive the next frame of the display panel. The display control circuit provided by the application can realize real-time matching of a refresh rate of the display panel and a software running frame rate while reducing subjective flicker effect.

Description

Technical Field

[0001] This application relates to the field of display device technology, specifically to display control circuits, display modules, and display devices. Background Technology

[0002] Variable refresh rate (VRR) allows the screen to refresh from low to high frequencies throughout the game, meaning the screen refresh rate can be matched to the game's frame rate in real time, avoiding stuttering and tearing caused by different frequencies.

[0003] The debugging method in related technologies is to debug the Gamma & VCOM voltage compensation at different frequencies: whenever the Thin Film Transistor Liquid Crystal Display Controller (Tcon) detects that the vertical blanking interval (V-blank) region has reached a certain length, it dynamically adjusts and modifies the Gamma & VCOM voltage of the Gamma IC through the internal integrated circuit (I2C), so as to achieve a brightness close to the corresponding frequency given by the I2C, and reduce screen flicker in the Variable Refresh Rate (VRR) mode.

[0004] However, the voltage fluctuation range of VCOM is relatively large. When the frequency changes instantaneously, the brightness will change significantly in a short period of time, resulting in a noticeable flickering. Summary of the Invention

[0005] In a first aspect, this application provides a display control circuit, including a controller and a voltage output circuit electrically connected, the display control circuit further including:

[0006] A voltage control circuit, one end of which is electrically connected to the voltage output circuit, and the other end of which is electrically connected to the display panel;

[0007] The controller is used to detect the frequency difference between the current frame and the next frame of the display panel, and control the voltage control circuit according to the frequency difference, so that the voltage control circuit controls the voltage output circuit to continuously increase or decrease the output voltage to the target voltage within the time of the next frame to drive the next frame of the display panel.

[0008] The next frame includes consecutive blank time periods and valid time periods;

[0009] When the controller determines that the absolute value of the voltage difference corresponding to the frequency difference is less than or equal to 0.1V, the controller controls the voltage output circuit to output the target voltage during the blank time period of the next frame to drive the next frame of the display panel;

[0010] When the controller determines that the absolute value of the voltage difference corresponding to the frequency difference is greater than 0.1V, the controller controls the voltage control circuit so that the voltage control circuit controls the voltage output circuit to continuously increase or decrease the output voltage to the target voltage during the blank time period and the effective time period of the next frame to drive the next frame of the display panel.

[0011] The display control circuit further includes:

[0012] A control switch, comprising an input interface, a first interface, and a second interface, wherein the input interface is electrically connected to the voltage output circuit, the first interface is electrically connected to the display panel, and the second interface is electrically connected to the voltage control circuit;

[0013] When the controller determines that the absolute value of the voltage difference corresponding to the frequency difference is less than or equal to 0.1V, the controller controls the input interface to be connected to the first interface and controls the input interface to be disconnected from the second interface.

[0014] When the controller determines that the absolute value of the frequency difference is greater than 0.1V, the controller controls the input interface to disconnect from the first interface and controls the input interface to connect to the second interface.

[0015] The voltage control circuit includes:

[0016] A variable resistor group, used to adjust the resistance value between the voltage output circuit and the display panel;

[0017] When the controller determines that the absolute value of the voltage difference corresponding to the frequency difference is less than or equal to 0.1V, the variable resistor group is not electrically connected to the path between the voltage output circuit and the display panel;

[0018] When the controller determines that the absolute value of the voltage difference corresponding to the frequency difference is greater than 0.1V, the variable resistor group is connected to the path between the voltage output circuit and the display panel, and the larger the absolute value of the voltage difference corresponding to the frequency difference, the larger the resistance value of the variable resistor group.

[0019] The variable resistor group includes a first variable resistor and a second variable resistor connected in series, and the adjustment accuracy of the first variable resistor is greater than that of the second variable resistor.

[0020] The voltage control circuit further includes:

[0021] A connecting switch group is electrically connected to the variable resistor group, and the connecting switch group is used to control the on / off state of the voltage control circuit.

[0022] The connecting switch group includes:

[0023] A switch input terminal, which is used to input a continuous voltage;

[0024] A first switch, comprising a first control terminal, a first terminal, and a second terminal, wherein the first control terminal is electrically connected to the switch input terminal and controls the first terminal and the second terminal to be connected or disconnected, the first terminal is grounded, and the second terminal is electrically connected to one end of the variable resistor group, wherein the first control terminal controls the first terminal and the second terminal to be connected after the connection voltage is input to the switch input terminal; and

[0025] The second switch includes a second control terminal, a third terminal, and a fourth terminal. The second control terminal is electrically connected to the other end of the variable resistor group and controls the third terminal and the fourth terminal to be connected or disconnected. The third terminal is electrically connected to the second interface, and the fourth terminal is electrically connected to the display panel. The second control terminal controls the third terminal and the fourth terminal to be connected after the first terminal and the second terminal are connected.

[0026] The display control circuit further includes:

[0027] The memory is electrically connected to the controller. The memory stores multiple voltage-resistance pairs. Each voltage-resistance pair includes a target voltage and a preset resistance value. Different voltage-resistance pairs have different target voltages and different preset resistance values.

[0028] The controller is used to select the preset resistance value that matches the target voltage from the plurality of voltage resistor pairs, and control the variable resistor group to adjust to the preset resistance value.

[0029] The display control circuit provided in this application connects the voltage control circuit between the voltage output circuit and the display panel. When the controller detects a frequency difference between the current frame and the next frame of the display panel, it controls the voltage control circuit based on this frequency difference. This causes the voltage control circuit to continuously increase or decrease the output voltage target value of the voltage output circuit within the time of the next frame to drive the display panel in the next frame. This reduces the voltage change rate of the display panel, thereby achieving real-time matching between the refresh rate of the display panel and the software's frame rate. Simultaneously, it avoids screen tearing and stuttering caused by different frequencies, reduces subjective flickering, and improves the user experience. Therefore, the display control circuit provided in this application can achieve real-time matching between the display panel's refresh rate and the software's frame rate while reducing subjective flickering.

[0030] Secondly, this application also provides a display module, the display module comprising:

[0031] Display panel; and

[0032] As described in the first aspect, the display control circuit is electrically connected to the display panel. The controller is used to detect the frequency difference between the current frame and the next frame of the display screen, and control the voltage control circuit according to the frequency difference, so that the voltage control circuit controls the voltage output circuit to continuously increase or decrease the output voltage to the target voltage within the time of the next frame to drive the next frame of the display panel.

[0033] In the display module provided in this application, the display control circuit can achieve real-time matching between the refresh rate of the display panel and the software running frame rate while reducing subjective flickering. This allows the display module to achieve real-time matching between the refresh rate of the display panel and the software running frame rate, while avoiding screen stuttering and tearing caused by different frequencies, reducing the subjective flickering of the display panel, and improving the user experience.

[0034] Thirdly, this application also provides a display device, the display device comprising:

[0035] Equipment body; and

[0036] The display module as described in the second aspect is mounted on the main body of the device.

[0037] The display device provided in this application can achieve real-time matching between the refresh rate of the display panel and the frame rate of the software while reducing subjective flicker. This allows the display device to achieve real-time matching between the refresh rate of the display panel and the frame rate of the software, while avoiding screen stuttering and tearing caused by different frequencies, and reducing the subjective flicker of the display panel, thus improving the user experience. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the implementation will be briefly introduced below. Obviously, the drawings described below are some implementations of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0039] Figure 1 Schematic diagram of the display control circuit provided in the embodiments of this application Figure 1 .

[0040] Figure 2 Schematic diagram of the display control circuit provided in the embodiments of this application Figure 2 .

[0041] Figure 3 for Figure 2 A schematic diagram of the output voltage of the medium voltage control circuit reaching the target voltage.

[0042] Figure 4 Schematic diagram of the display control circuit provided in the embodiments of this application Figure 3 .

[0043] Figure 5 Schematic diagram of the display control circuit provided in the embodiments of this application Figure 4 .

[0044] Figure 6 Schematic diagram of the display control circuit provided in the embodiments of this application Figure 5 .

[0045] Figure 7 Schematic diagram of the display control circuit provided in the embodiments of this application Figure 6 .

[0046] Figure 8 Schematic diagram of the display control circuit provided in the embodiments of this application Figure 7 .

[0047] Figure 9 Schematic diagram of the display control circuit provided in the embodiments of this application Figure 8 .

[0048] Figure 10This is a schematic diagram of the circuit connection of a voltage control circuit provided in an embodiment of this application.

[0049] Figure 11 This is a schematic diagram of the connection of a display module provided in one embodiment of this application.

[0050] Figure 12 This is a schematic diagram of the structure of a display device provided in one embodiment of this application.

[0051] Reference numerals: Display control circuit 10; Controller 11; Voltage output circuit 12; Voltage control circuit 13; Variable resistor group 131; First variable resistor 1311; Second variable resistor 1312; Connecting switch group 132; Switch input terminal 1321; First switch 1322; First control terminal 1323; First terminal 1324; Second terminal 1325; Second switch 1326; Second control terminal 1327; Third terminal 1328; Fourth terminal 1329; First protection resistor 133; Capacitor group 134; Current limiting resistor 135; Bias resistor 136; Control switch 14; Input interface 141; First interface 142; Second interface 143; Memory 15; Output port 16; Zener diode 17; Second protection resistor 18; Display panel 20; Display module 1; Main body of device 2; Display device 3; Blank time period T1; Valid time period T2. Detailed Implementation

[0052] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0053] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0054] In this document, references to "embodiment" or "implementation" mean that a particular feature, structure, or characteristic described in connection with an embodiment or implementation may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0055] This application provides a display control circuit 10. Please refer to... Figure 1 , Figure 1 Schematic diagram of the display control circuit provided in the embodiments of this application Figure 1 In this embodiment, the display control circuit 10 includes a controller 11, a voltage output circuit 12, and a voltage control circuit 13 electrically connected. One end of the voltage control circuit 13 is electrically connected to the voltage output circuit 12, and the other end of the voltage control circuit 13 is electrically connected to the display panel 20. The controller 11 is used to detect the frequency difference between the current frame and the next frame of the display screen 20, and controls the voltage control circuit 13 according to the frequency difference, so that the voltage control circuit 13 controls the voltage output circuit 12 to continuously increase or decrease the output voltage to a target voltage within the time of the next frame to drive the display panel 20 in the next frame.

[0056] In this embodiment, by connecting the voltage control circuit 13 between the voltage output circuit 12 and the display panel 20, the voltage output from the voltage output circuit 12 to the display panel 20 is gradually changed under the control of the controller 11. This reduces the voltage change rate between adjacent frames, thereby achieving real-time matching between the refresh rate of the display screen 20 and the software running frame rate, while avoiding screen stuttering and tearing caused by different frequencies, reducing the subjective flicker effect of the display panel 20, and improving the user experience.

[0057] Specifically, the display control circuit 10 has a VRR mode, which is illustrated by demonstrating the application of the VRR mode in a game. VRR allows the display to refresh from low to high frequencies throughout the game, so that the refresh rate of the display panel 20 can match the game frame rate in real time, avoiding screen tearing and stuttering caused by different frequencies. When the controller 11 detects a frequency difference between the current frame and the next frame of the display panel 20, the controller 11 obtains the target voltage required for the next frame based on the frequency difference, and the voltage control circuit 13 controls the voltage output circuit 12 to continuously and gradually increase or decrease the output voltage to the target voltage within the next frame, thereby driving the game screen displayed on the display panel 20 in the next frame. This ensures that the refresh rate of the display panel 20 can match the game frame rate in real time within the next frame, avoiding screen tearing and stuttering caused by different frequencies. Furthermore, because the voltage of the display panel 20 continuously and gradually increases or decreases within the next frame, the voltage change rate is slow, which avoids instantaneous changes in brightness of the display panel 20 within a short period of time, thereby reducing the subjective flickering effect of the display panel 20.

[0058] The controller 11 is a Thin Film Transistor Liquid Crystal Display Controller (Tcon), and the voltage output circuit 12 is a Gamma Integrated Circuit (Gamma IC) or a Power Management IC (PMIC). The voltage output by the voltage output circuit 12 is a Gamma voltage or a VCOM voltage (e.g., CFVCOM, AVCOM, SVCOM, etc.). When the frequency between two adjacent frames changes, the voltage output circuit 12 changes the voltage output to the display panel 20, also known as voltage compensation.

[0059] In summary, the display control circuit 10 provided in this application connects the voltage control circuit 13 between the voltage output circuit 12 and the display panel 20. When the controller 11 detects a frequency difference between the current frame and the next frame of the display screen 20, it controls the voltage control circuit 13 based on this frequency difference. This causes the voltage control circuit 13 to control the voltage output circuit 12 to continuously increase or decrease the target output voltage value within the time of the next frame to drive the display panel 20 in the next frame. This reduces the voltage change rate of the display panel 20, thereby achieving real-time matching between the refresh rate of the display screen 20 and the software running frame rate. Simultaneously, it avoids screen stuttering and tearing caused by different frequencies and reduces the subjective flickering effect of the display panel 20, improving the user experience. Therefore, the display control circuit 10 provided in this application can achieve real-time matching between the refresh rate of the display panel 20 and the software running frame rate while reducing the subjective flickering effect.

[0060] Please refer to Figure 2 and Figure 3 , Figure 2 Schematic diagram of the display control circuit provided in the embodiments of this application Figure 2 ; Figure 3 for Figure 2 A schematic diagram of the voltage control circuit outputting voltage to the target voltage. In this embodiment, the next frame includes a continuous blank time period T1 and an effective time period T2. When the controller 11 determines that the absolute value of the voltage difference corresponding to the frequency difference is less than or equal to 0.1V, the controller 11 controls the voltage output circuit 12 to output the target voltage during the blank time period T1 of the next frame to drive the next frame of the display panel 20. When the controller 11 determines that the absolute value of the voltage difference corresponding to the frequency difference is greater than 0.1V, the controller 11 controls the voltage control circuit 13 so that the voltage control circuit 13 controls the voltage output circuit 12 to continuously increase or decrease the output voltage to the target voltage during the blank time period T1 and the effective time period T2 of the next frame to drive the next frame of the display panel 20.

[0061] In this embodiment, the voltage output circuit 12 and the display panel 20 are connected by two electrical lines. One electrical connection is that the voltage output circuit 12 is directly connected to the output port 16, and then connected to the display panel 20 through the output port 16. The other electrical connection is that the voltage output circuit 12 is connected to the output port 16 through the voltage control circuit 13, and then connected to the display panel 20 through the output port 16. When the controller 11 determines that the absolute value of the voltage difference corresponding to the frequency difference is less than or equal to 0.1V, the controller 11 controls the voltage output circuit 12 to directly output the target voltage through the output port 16 to drive the display panel 20 in the next frame. That is, the controller 11 controls the voltage output circuit 12 to output the target voltage during the blank time period T1 of the next frame, thereby achieving rapid voltage compensation. When the controller 11 determines that the absolute value of the voltage difference corresponding to the frequency difference is greater than 0.1V, the controller 11 controls the voltage output circuit 12 to output the target voltage sequentially through the voltage control circuit 13 and the output port 16 to drive the next frame of the display panel 20. This means the controller 11 controls the voltage control circuit 13 to continuously increase or decrease the output voltage to the target voltage during the blank time period T1 and the effective time period T2 of the next frame, achieving smooth voltage compensation. Therefore, the display control circuit 10 provided in this embodiment can perform differentiated adjustment according to the magnitude of the absolute value of the frequency difference. That is, it achieves rapid voltage compensation to improve voltage compensation efficiency when the absolute value of the voltage difference corresponding to the frequency difference is small, and achieves smooth voltage compensation to reduce subjective flicker when the absolute value of the voltage difference corresponding to the frequency difference is large. Here, the blank time period T1 is also called blank, and the effective time period T2 is also called active frame.

[0062] For example (see Figure 3 The voltage corresponding to the current frame is a first voltage. When the target voltage corresponding to the next frame is a second voltage and the difference between the second voltage and the first voltage is less than or equal to 0.1V, the voltage output circuit 12 increases the voltage output from the first voltage to the second voltage during the blank time period T1 of the next frame. When the target voltage corresponding to the next frame is a third voltage and the difference between the third voltage and the first voltage is greater than 0.1V, the voltage output circuit 12 continuously increases the voltage output from the first voltage to the third voltage during the blank time period T1 and the effective time period T2 of the next frame.

[0063] Please refer to Figure 4 , Figure 4Schematic diagram of the display control circuit provided in the embodiments of this application Figure 3 In this embodiment, the display control circuit 10 further includes a control switch 14. The control switch 14 includes an input interface 141, a first interface 142, and a second interface 143. The input interface 141 is electrically connected to the voltage output circuit 12, the first interface 142 is electrically connected to the display panel 20, and the second interface 143 is electrically connected to the voltage control circuit 13. When the controller 11 determines that the absolute value of the voltage difference corresponding to the frequency difference is less than or equal to 0.1V, the controller 11 controls the input interface 141 to be connected to the first interface 142 and controls the input interface 141 to be disconnected from the second interface 143. When the controller 11 determines that the absolute value of the frequency difference is greater than 0.1V, the controller 11 controls the input interface 141 to be disconnected from the first interface 142 and controls the input interface 141 to be connected to the second interface 143.

[0064] In this embodiment, the control switch 14, under the control of the controller 11, connects the input interface 141 to the first interface 142 and disconnects the input interface 141 from the second interface 143, or connects the input interface 141 to the second interface 143 and disconnects the input interface 141 from the first interface 142.

[0065] Specifically, when the controller 11 determines that the absolute value of the voltage difference corresponding to the frequency difference is less than or equal to 0.1V, the controller 11 controls the input interface 141 to be connected to the first interface 142 and controls the input interface 141 to be disconnected from the second interface 143, so that the voltage output circuit 12 is directly electrically connected to the display panel 20 through the output port 16. When the controller 11 determines that the absolute value of the frequency difference is greater than 0.1V, the controller 11 controls the input interface 141 to be disconnected from the first interface 142 and controls the input interface 141 to be connected to the second interface 143, so that the voltage control circuit 13 is connected between the voltage output circuit 12 and the output port 16, so that the voltage control circuit 13 can adjust the speed at which the voltage output circuit 12 performs voltage compensation on the display panel 20.

[0066] Please refer to Figure 5 , Figure 5 Schematic diagram of the display control circuit provided in the embodiments of this application Figure 4In this embodiment, the voltage control circuit 13 includes a variable resistor group 131, which is used to adjust the resistance value between the voltage output circuit 12 and the display panel 20. When the controller 11 determines that the absolute value of the voltage difference corresponding to the frequency difference is less than or equal to 0.1V, the variable resistor group 131 is not electrically connected to the path between the voltage output circuit 12 and the display panel 20. When the controller 11 determines that the absolute value of the voltage difference corresponding to the frequency difference is greater than 0.1V, the variable resistor group 131 is connected to the path between the voltage output circuit 12 and the display panel 20, and the larger the absolute value of the voltage difference corresponding to the frequency difference, the larger the resistance value of the variable resistor group 131.

[0067] In this embodiment, when the controller 11 determines that the absolute value of the voltage difference corresponding to the frequency difference is greater than 0.1V, the controller 11 controls the input interface 141 to disconnect from the first interface 142 and controls the input interface 141 to connect to the second interface 143, so as to connect the variable resistor to the path between the voltage output circuit 12 and the display panel 20, thereby increasing the resistance value in the path between the voltage output circuit 12 and the display panel 20, and thus reducing the speed of voltage change. Specifically, the resistance value of the variable resistor group 131 connected to the path between the voltage output circuit 12 and the display panel 20 is adjustable. The larger the absolute value of the voltage difference corresponding to the frequency difference, the larger the resistance value of the variable resistor group 131 connected to the path between the voltage output circuit 12 and the display panel 20 controlled by the controller 11, so that the time for the voltage of the display panel 20 to change to the target voltage in the next frame is longer, thus the voltage change speed tends to be smoother, so as to avoid subjective flickering effect.

[0068] Furthermore, when the absolute values ​​of the voltage differences corresponding to the frequency differences are the same, the smaller the absolute value of the voltage corresponding to the current frame, the larger the resistance value of the variable resistor group 131 connected to the voltage output circuit 12 and the display panel 20 by the controller 11, so that the voltage of the display panel 20 changes to the target voltage in the next frame for a longer time, and thus the voltage change speed tends to be smoother, so as to avoid subjective flickering effect.

[0069] Please refer to Figure 6 , Figure 6 Schematic diagram of the display control circuit provided in the embodiments of this application Figure 5 In this embodiment, the variable resistor group 131 includes a first variable resistor 1311 and a second variable resistor 1312 connected in series, and the adjustment accuracy of the first variable resistor 1311 is greater than the adjustment accuracy of the second variable resistor 1312.

[0070] In this embodiment, the adjustment accuracy of the first variable resistor 1311 is greater than that of the second variable resistor 1312, so that the first variable resistor 1311 is used for fine adjustment and the second variable resistor 1312 is used for coarse adjustment, thereby achieving rapid adjustment of the resistance while meeting the adjustment accuracy requirements.

[0071] Optionally, the resistance value of the first variable resistor 1311 is adjustable from 0Ω to 10kΩ, and the resistance value of the second variable resistor 1312 is adjustable from 0Ω to 200kΩ.

[0072] Please refer to Figure 7 , Figure 7 Schematic diagram of the display control circuit provided in the embodiments of this application Figure 6 In this embodiment, the voltage control circuit 13 further includes a switching group 132. The switching group 132 is electrically connected to the variable resistor group 131, and the switching group 132 is used to control the on / off state of the voltage control circuit 13.

[0073] In this embodiment, the voltage control circuit 13 further includes a connection switch group 132, which is used to control the on / off state of the voltage control circuit 13, thereby controlling whether the variable resistor group 131 is connected to the path between the voltage output circuit 12 and the display panel 20.

[0074] Specifically, in one embodiment, when the display panel 20 is in VRR mode, the voltage control circuit 13 is controlled by the connection switch group 132 to allow the variable resistor group 131 to be connected to the voltage output circuit 12 and the display panel 20, thereby achieving voltage compensation as described in the aforementioned embodiment. When the display panel 20 is not in VRR mode or is not in VRR mode, the connection switch group 132 controls the voltage control circuit 13 to be disconnected, so that the variable resistor group 131 is not connected to the voltage output circuit 12 and the display panel 20, thereby achieving energy saving. In another embodiment, the connection switch group 132 is used to control the connection between the input interface 141 and the second interface 143. When the controller 11 determines that the absolute value of the voltage difference corresponding to the frequency difference is less than or equal to 0.1V, the controller 11 controls the connection switch group 132 to disconnect the input interface 141 and the second interface 143. When the controller 11 determines that the absolute value of the voltage difference corresponding to the frequency difference is greater than 0.1V, the controller 11 controls the connection switch group 132 to connect the input interface 141 and the second interface 143.

[0075] Specifically, please refer to Figure 7 and Figure 8 , Figure 8 Schematic diagram of the display control circuit provided in the embodiments of this application Figure 7 In this embodiment, the connection switch group 132 includes a switch input terminal 1321, a first switch 1322, and a second switch 1326. The switch input terminal 1321 is used to input a connection voltage. The first switch 1322 includes a first control terminal 1323, a first terminal 1324, and a second terminal 1325. The first control terminal 1323 is electrically connected to the switch input terminal 1321 and controls the first terminal 1324 and the second terminal 1325 to be connected or disconnected. The first terminal 1324 is grounded, and the second terminal 1325 is electrically connected to one end of the variable resistor group 131. The first control terminal 1323 controls the first terminal 1324 and the second terminal 1325 to be connected after the connection voltage is input to the switch input terminal 1321. The second switch 1326 includes a second control terminal 1327, a third terminal 1328, and a fourth terminal 1329. The second control terminal 1327 is electrically connected to the other end of the variable resistor group 131 and controls the third terminal 1328 and the fourth terminal 1329 to be connected or disconnected. The third terminal 1328 is electrically connected to the second interface 143, and the fourth terminal 1329 is electrically connected to the display panel 20. Specifically, the second control terminal 1327 controls the third terminal 1328 and the fourth terminal 1329 to be connected after the first terminal 1324 and the second terminal 1325 are connected. In other words, by controlling whether a connection voltage is input to the switch input terminal 1321, the variable resistor group 131 is controlled to be connected in the path between the voltage output circuit 12 and the display panel 20.

[0076] Optionally, the first switch 1322 is a semiconductor switch, specifically a metal-oxide-semiconductor field-effect transistor (MOSFET) switch. The first control terminal 1323 is the gate, the first terminal 1324 is the source, and the second terminal 1325 is the drain.

[0077] Optionally, the second switch 1326 is a semiconductor switch, specifically a metal-oxide-semiconductor field-effect transistor (MOSFET) switch. The second control terminal 1327 is the gate, the third terminal 1328 is the source, and the fourth terminal 1329 is the drain.

[0078] Please refer to Figure 9 , Figure 9Schematic diagram of the display control circuit provided in the embodiments of this application Figure 8 In this embodiment, the display control circuit 10 further includes a memory 15. The memory 15 is electrically connected to the controller 11, and the memory 15 stores a plurality of voltage-resistance pairs. Each voltage-resistance pair includes a target voltage and a preset resistance value. Different voltage-resistance pairs have different target voltages and different preset resistance values. The controller 11 is used to retrieve the preset resistance value that matches the target voltage from the plurality of voltage-resistance pairs, and control the variable resistor group 131 to adjust to the preset resistance value.

[0079] In this embodiment, by pre-compiling the voltage-resistance pair and storing it in the memory 15, when the controller 11 determines that the absolute value of the voltage difference corresponding to the frequency difference is greater than 0.1V, the controller 11 controls the input interface 141 to disconnect from the first interface 142 and controls the input interface 141 to connect to the second interface 143, so that the variable resistor group 131 is connected between the voltage output circuit 12 and the output port 16. After the controller 11 calculates the target voltage according to the frequency difference, it can read the preset resistance value matching the target voltage from the memory 15 and control the variable resistor group 131 to quickly adjust to the preset resistance value, so that the voltage output circuit 12 can continuously increase or decrease the voltage value of the target voltage at a preset speed in the next frame time, thereby driving the display panel 20 in the next frame. Therefore, the display control circuit 10 provided in this embodiment can improve the resistance adjustment speed of the variable resistor group 131 through the memory 15, which helps to avoid the voltage change speed being too fast due to the resistance adjustment speed of the variable resistor group 131 being too slow, resulting in a subjective flickering effect. It can also avoid the voltage change speed being too slow due to the resistance adjustment speed of the variable resistor group 131 being too slow, resulting in a mismatch between the refresh rate of the display panel 20 and the software running frame rate in the next frame, resulting in screen stuttering and tearing.

[0080] Example

[0081] Please refer to Figure 3 , Figure 8 and Figure 10 , Figure 10 This is a schematic diagram of the circuit connection of a voltage control circuit provided in one embodiment of this application. In this embodiment, one end of the voltage control circuit 13 is electrically connected to the output port 16, and the other end is electrically connected to the control switch 14.

[0082] Specifically, the control switch 14 includes an input interface 141, a first interface 142, and a second interface 143. The input interface 141 is electrically connected to the voltage output circuit 12, the first interface 142 is electrically connected to the output port 16, and the second interface 143 is electrically connected to the voltage control circuit 13.

[0083] The voltage control circuit 13 includes a variable resistor group 131 and a switching group 132, wherein the variable resistor group 131 includes a first variable resistor 1311 and a second variable resistor 1312. The switching group 132 includes a switch input terminal 1321, a first switch 1322, and a second switch 1326. The switch input terminal 1321 is used to input a connection voltage. The first switch 1322 includes a first control terminal 1323, a first terminal 1324, and a second terminal 1325. The first control terminal 1323 is electrically connected to the switch input terminal 1321, the first terminal 1324 is grounded, and the second terminal 1325 is electrically connected to one end of the first variable resistor 1311. The second switch 1326 includes a second control terminal 1327, a third terminal 1328, and a fourth terminal 1329. The second control terminal 1327 is electrically connected to the end of the second variable resistor 1312 that is away from the first variable resistor 1311, the third terminal 1328 is electrically connected to the second interface 143, and the fourth terminal 1329 is electrically connected to the output port 16.

[0084] When the controller 11 determines that the absolute value of the voltage difference corresponding to the frequency difference is less than or equal to 0.1V, the controller 11 controls the switch input terminal 1321 to disconnect the first control terminal 1323 from the first terminal 1324 and the second terminal 1325, thereby causing the second control terminal 1327 to disconnect the third terminal 1328 from the fourth terminal 1329, and then disconnect the input interface 141 from the second interface 143. The input interface 141 is connected to the first interface 142, and the voltage output circuit 12 outputs voltage to the target voltage in the next frame of the display panel 20 via the input interface 141, the first interface 142, and the output port 16 in sequence.

[0085] When the controller 11 determines that the absolute value of the voltage difference corresponding to the frequency difference is greater than 0.1V, the controller 11 controls the switch input terminal 1321 to input a connection voltage so that the first control terminal 1323 controls the first terminal 1324 and the second terminal 1325 to conduct, thereby causing the second control terminal 1327 to control the third terminal 1328 and the fourth terminal 1329 to conduct, thereby causing the input interface 141 to conduct with the second interface 143, and the input interface 141 to disconnect from the first interface 142. The voltage output circuit 12 sequentially increases or decreases the output voltage value of the target voltage during the blank time period T1 and the effective time period T2 of the next frame via the input interface 141, the second interface 143, the voltage control circuit 13, and the output port 16 to drive the display panel 20 in the next frame.

[0086] Optionally, a first protective resistor 133 is provided between the first terminal 1324 and the ground terminal for circuit protection.

[0087] Optionally, a capacitor bank 134 is provided between the first terminal 1324 and the switch input terminal 1321 for voltage regulation.

[0088] Optionally, a current-limiting resistor 135 is provided between the first terminal 1324 and the switch input terminal 1321 for protection and current limiting.

[0089] Optionally, a bias resistor 136 is provided between the endpoint of the second variable resistor 1312 electrically connected to the second control terminal 1327 and the endpoint of the third terminal 1328 electrically connected to the second interface 143.

[0090] Optionally, the display control circuit 10 further includes a Zener diode 17, one end of which is electrically connected between the first interface 142 and the output port 16, and the other end of which is electrically connected to one end of a second protection resistor 18, the other end of which is grounded. The Zener diode 17 and the second protection resistor 18 are used for voltage regulation.

[0091] It should be noted that the above circuit is only one implementation circuit for the display control circuit 10 provided in this application, and does not limit the display control circuit 10 provided in this application.

[0092] This application also provides display module 1. Please refer to... Figures 1-11 , Figure 11This is a connection diagram of a display module provided in one embodiment of this application. In this embodiment, the display module 1 includes a display panel 20 and a display control circuit 10 as described in any of the foregoing embodiments. The display control circuit 10 is electrically connected to the display panel 20. The controller 11 is used to detect the frequency difference between the current frame and the next frame of the display screen 20, and controls the voltage control circuit 13 according to the frequency difference, so that the voltage control circuit 13 controls the voltage output circuit 12 to continuously increase or decrease the output voltage to a target voltage within the time of the next frame to drive the display panel 20 in the next frame.

[0093] In this embodiment, since the display control circuit 10 can achieve real-time matching between the refresh rate of the display panel 20 and the software running frame rate while reducing subjective flickering, the display module 1 can achieve real-time matching between the refresh rate of the display screen 20 and the software running frame rate, while avoiding screen stuttering and tearing caused by different frequencies, and reducing the subjective flickering of the display panel 20, thus improving the user experience.

[0094] This application also provides a display device 3. Please refer to... Figures 1-12 , Figure 12 This is a schematic diagram of the structure of a display device provided in one embodiment of this application. In this embodiment, the display device 3 includes a device body 2 and a display module 1 as provided in the aforementioned embodiments. The display module 1 is mounted on the device body 2.

[0095] In this embodiment, the display device 3 may be, but is not limited to, a mobile phone, tablet computer, laptop computer, handheld computer, personal computer (PC), personal digital assistant (PDA), etc.

[0096] The display device 3 provided in this application can achieve real-time matching of the refresh rate of the display panel 20 with the software running frame rate while reducing subjective flickering. This allows the display device 3 to achieve real-time matching of the refresh rate of the display panel 20 with the software running frame rate, while avoiding screen stuttering and tearing caused by different frequencies, and reducing the subjective flickering of the display panel 20, thus improving the user experience.

[0097] Optionally, the device body 2 includes a mid-frame, a power supply, and a rear cover. One side of the mid-frame houses the display module 1, and the other side houses the power supply. The power supply is electrically connected to the display module 1 to provide power. The rear cover cooperates with the mid-frame to seal the power supply. Alternatively, the device body 2 includes a power supply and a housing. The power supply is electrically connected to the display module 1 to provide power. The housing houses the display module 1 and the power supply. The device body 2 may also have other structures, which are not limited here.

[0098] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application, and such improvements and refinements are also considered to be within the protection scope of this application.

Claims

1. A display control circuit comprising a controller and a voltage output circuit electrically connected, characterized by, The display control circuit further comprises: a voltage control circuit, one end of the voltage control circuit being electrically connected to the voltage output circuit, and the other end of the voltage control circuit being electrically connected to the display panel; the controller is configured to detect a frequency difference between a current frame and a next frame of a display image of the display panel, and control the voltage control circuit according to the frequency difference, so that the voltage control circuit controls the voltage output circuit to continuously increase or decrease the output voltage to a target voltage in a time of the next frame to drive the next frame of the display panel; the next frame comprises a continuous blank time period and a valid time period; when the controller determines that an absolute value of a voltage difference corresponding to the frequency difference is less than or equal to 0.1V, the controller controls the voltage output circuit to output the target voltage in the blank time period of the next frame to drive the next frame of the display panel; when the controller determines that the absolute value of the voltage difference corresponding to the frequency difference is greater than 0.1V, the controller controls the voltage control circuit, so that the voltage control circuit controls the voltage output circuit to continuously increase or decrease the output voltage to the target voltage in the blank time period and the valid time period of the next frame to drive the next frame of the display panel.

2. The display control circuit according to claim 1, wherein The display control circuit further comprises: a control switch, the control switch comprising an input interface, a first interface and a second interface, the input interface being electrically connected to the voltage output circuit, the first interface being electrically connected to the display panel, and the second interface being electrically connected to the voltage control circuit; when the controller determines that the absolute value of the voltage difference corresponding to the frequency difference is less than or equal to 0.1V, the controller controls the input interface and the first interface to be conductive, and controls the input interface and the second interface to be disconnected; when the controller determines that the absolute value of the frequency difference is greater than 0.1V, the controller controls the input interface and the first interface to be disconnected, and controls the input interface and the second interface to be conductive.

3. The display control circuit according to claim 2, wherein The voltage control circuit comprises: a variable resistance group, the variable resistance group being configured to adjust a resistance value between the voltage output circuit and the display panel; when the controller determines that the absolute value of the voltage difference corresponding to the frequency difference is less than or equal to 0.1V, the variable resistance group is not connected in a path between the voltage output circuit and the display panel; when the controller determines that the absolute value of the voltage difference corresponding to the frequency difference is greater than 0.1V, the variable resistance group is connected in the path between the voltage output circuit and the display panel, and the greater the absolute value of the voltage difference corresponding to the frequency difference, the greater the resistance value of the variable resistance group.

4. The display control circuit according to claim 3, wherein The variable resistance group comprises a first variable resistance and a second variable resistance connected in series, and the adjustment precision of the first variable resistance is greater than that of the second variable resistance.

5. The display control circuit according to claim 3, wherein The voltage control circuit further comprises: a communication switch group, the communication switch group being electrically connected to the variable resistance group, and the communication switch group being configured to control the on-off of the voltage control circuit.

6. The display control circuit according to claim 5, wherein The communication switch group comprises: A switch input end for inputting a communication voltage; A first switch comprising a first control end, a first end and a second end, the first control end being electrically connected to the switch input end and controlling the first end and the second end to be conducted or disconnected, the first end being grounded, and the second end being electrically connected to one end of the variable resistance group, wherein the first control end controls the first end and the second end to be conducted after the switch input end inputs the communication voltage; and A second switch comprising a second control end, a third end and a fourth end, the second control end being electrically connected to the other end of the variable resistance group and controlling the third end and the fourth end to be conducted or disconnected, the third end being electrically connected to the second interface, and the fourth end being electrically connected to the display panel, wherein the second control end controls the third end and the fourth end to be conducted after the first end and the second end are conducted.

7. The display control circuit according to claim 3, wherein The display control circuit further comprises: a memory electrically connected to the controller, the memory storing a plurality of voltage resistance pairs, each voltage resistance pair comprising a target voltage and a preset resistance value, the target voltage in different voltage resistance pairs being different, and the preset resistance value in different voltage resistance pairs being different; the controller being configured to call the preset resistance value in the voltage resistance pair matching the target voltage from the plurality of voltage resistance pairs according to the target voltage, and control the variable resistance group to be adjusted to the preset resistance value.

8. A display module, characterized by The display module comprises: a display panel; and The display control circuit according to any one of claims 1-7, the display control circuit being electrically connected to the display panel, and the controller being configured to detect a frequency difference between a current frame and a next frame of a display panel display picture, and control the voltage control circuit according to the frequency difference, so that the voltage control circuit controls the voltage output circuit to continuously increase or decrease the output voltage to a target voltage in the time of the next frame to drive the next frame of the display panel.

9. A display device, characterized by The display device comprises: a device main body; and The display module according to claim 8, the display module being arranged in the device main body.

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