Driving circuit and driving method

Abstract

The present application discloses a driving circuit and a driving method, wherein the driving circuit includes a light-emitting module, a power module, a first driving module, a current adjustment module, and a control module, wherein the power module is electrically connected to the first driving module and the current adjustment module, the first driving module is electrically connected to the current adjustment module and the control module, and the light-emitting module is electrically connected to the current adjustment module; the light-emitting module emits light based on the driving current; the power module is used to transmit a first voltage to the first driving module and the current adjustment module; the control module is used to output a first control signal and transmit it to the first driving module; the first driving module is used to adjust the first voltage to a second voltage under the control of the first control signal and transmit it to the current adjustment module; the current adjustment module is used to control the magnitude of the driving current based on the first voltage and the second voltage. By setting the current adjustment module, the color deviation problem of the display screen caused by grayscale changes can be solved.

Description

Technical Field

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

[0002] Liquid crystal displays have many advantages such as thin body, power saving, and no radiation, and have been widely used, such as LCD TVs, smart phones, digital cameras, tablets, computer screens, or laptop screens, etc., and dominate the field of flat panel displays.

[0003] The existing liquid crystal display usually has an effective display area including a plurality of sub-pixels arranged in an array, and a gate driver and a source driver arranged at the periphery of the effective display area, wherein the data signal output by the source driver is sent to the sub-pixels of the corresponding column via each routing in the fan-shaped routing area. Furthermore, the routing on both sides of the fan-shaped routing area is long and has a large impedance, while the routing in the middle of the fan-shaped routing area is short and has a small impedance. Since large-sized liquid crystal displays have a better visual experience, the large-size liquid crystal displays such as smart liquid crystal TVs have become a trend. The user's demand for liquid crystal displays has increased from the previous mainstream 32 inches to 55 inches or even larger. However, as the panel size increases, the routing at different positions in the fan-shaped routing area has a large impedance difference due to the large length difference, resulting in different delays of the data signals entering the sub-pixels of different columns, which directly causes a large color deviation between different partitions of the liquid crystal display, resulting in a color deviation phenomenon.

[0004] In the prior art, the color deviation is improved by performing corresponding data voltage compensation on different partitions of a large-size liquid crystal display to compensate for the difference in charging conditions of each partition. However, the existing color deviation compensation technology has limited improvement. When the grayscale of the data signal changes greatly, the color deviation phenomenon still exists. Summary of the invention

[0005] The present application provides a driving circuit and a driving method, which can solve the problem of color deviation of a display screen caused by grayscale changes by setting a current adjustment module to adjust the magnitude of the driving current.

[0006] In a first aspect, an embodiment of the present application provides a driving circuit, characterized in that it includes: a light-emitting module, a power module, a first driving module, a current adjustment module, and a control module, wherein the power module is electrically connected to the first driving module and the current adjustment module, the first driving module is electrically connected to the current adjustment module and the control module, and the light-emitting module is electrically connected to the current adjustment module; the light-emitting module emits light based on the driving current; the power module is used to transmit a first voltage to the first driving module and the current adjustment module; the control module is used to output a first control signal and transmit it to the first driving module; the first driving module is used to adjust the first voltage to a second voltage under the control of the first control signal and transmit it to the current adjustment module; the current adjustment module is used to control the magnitude of the driving current based on the first voltage and the second voltage.

[0007] Optionally, in some embodiments of the present application, the current adjustment module includes a first transistor, a second transistor, a third transistor and a first resistor, a second resistor, and a third resistor, the first electrode of the first transistor is electrically connected to the first driving module, the second electrode of the first transistor is electrically connected to the input end of the first resistor, the gate of the first transistor is electrically connected to the power supply module, and the output end of the first resistor is electrically connected to the light-emitting module; the first electrode of the second transistor is electrically connected to the first driving module, the second electrode of the second transistor is electrically connected to the input end of the second resistor, the gate of the second transistor is electrically connected to the power supply module, and the output end of the second resistor is electrically connected to the light-emitting module; the first electrode of the third transistor is electrically connected to the first driving module, the second electrode of the third transistor is electrically connected to the input end of the third resistor, the gate of the third transistor is electrically connected to the power supply module, and the output end of the third resistor is electrically connected to the light-emitting module.

[0008] Optionally, in some embodiments of the present application, the light-emitting module includes a first light-emitting device, a second light-emitting device, and a third light-emitting device, the input end of the first light-emitting device is electrically connected to the output end of the first resistor, the input end of the second light-emitting device is electrically connected to the output end of the second resistor, and the input end of the third light-emitting device is electrically connected to the output end of the third resistor.

[0009] Optionally, in some embodiments of the present application, the first electrode of the first transistor, the first electrode of the second transistor, and the first electrode of the third transistor are electrically connected to a first node; the power supply module is electrically connected to the gate of the first transistor, the gate of the second transistor, and the gate of the third transistor in a one-to-one correspondence.

[0010] Optionally, in some embodiments of the present application, the first driving module is electrically connected to the first electrode of the first transistor, the first electrode of the second transistor, and the first electrode of the third transistor in a one-to-one correspondence; the gate of the first transistor, the gate of the second transistor, and the gate of the third transistor are electrically connected to the first node.

[0011] Optionally, in some embodiments of the present application, the driving circuit also includes a second driving module, which is electrically connected to the light-emitting module and the control module; the control module is also used to output a second control signal and transmit it to the second driving module, and the second driving module is used to control the conduction or cutoff of the light-emitting module under the control of the second control signal.

[0012] Optionally, in some embodiments of the present application, the second driving module is electrically connected to the output end of the first light-emitting device, the output end of the second light-emitting device, and the output end of the third light-emitting device in a one-to-one correspondence.

[0013] Optionally, in some embodiments of the present application, the first electrode of the first transistor, the first electrode of the second transistor, and the first electrode of the third transistor are electrically connected to a first node; the gate of the first transistor, the gate of the second transistor, and the gate of the third transistor are electrically connected to a second node.

[0014] Optionally, in some embodiments of the present application, the first electrode of the first transistor, the first electrode of the second transistor, and the first electrode of the third transistor are electrically connected to a first node; and the power supply module is electrically connected to the gate of the first transistor, the gate of the second transistor, and the gate of the third transistor in a one-to-one correspondence; or, the first driving module is electrically connected to the first electrode of the first transistor, the first electrode of the second transistor, and the first electrode of the third transistor in a one-to-one correspondence; the gate of the first transistor, the gate of the second transistor, and the gate of the third transistor are electrically connected to a second node.

[0015] On the other hand, the present application provides a driving method, which is applied to the above-mentioned driving circuit, including: a power supply module transmits a first voltage to a first driving module and a current adjustment module; a control module outputs a first control signal and transmits it to the first driving module; under the control of the first control signal, the first driving module adjusts the first voltage to a second voltage and transmits it to the current adjustment module; the current adjustment module controls the size of the driving current based on the first voltage and the second voltage; and the light-emitting module emits light based on the driving current.

[0016] The present application provides a driving circuit and a driving method, the driving circuit includes a light-emitting module, a power module, a first driving module, a current adjustment module, and a control module, the power module is electrically connected to the first driving module and the current adjustment module, the first driving module is electrically connected to the current adjustment module and the control module, and the light-emitting module is electrically connected to the current adjustment module; the light-emitting module emits light based on the driving current; the power module is used to transmit a first voltage to the first driving module and the current adjustment module; the control module is used to output a first control signal and transmit it to the first driving module; the first driving module is used to adjust the first voltage to a second voltage under the control of the first control signal and transmit it to the current adjustment module; the current adjustment module is used to control the magnitude of the driving current based on the first voltage and the second voltage. The driving circuit provided in the present application can solve the problem of color deviation of the display screen caused by grayscale changes by setting a current adjustment module to adjust the magnitude of the driving current. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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. The drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of a first structure of a driving circuit provided in an embodiment of the present application;

[0019] Figure 2 is a circuit diagram of a driving circuit provided in the first embodiment of the present application;

[0020] Figure 3 is a circuit diagram of a driving circuit provided in the second embodiment of the present application;

[0021] Figure 4 is a second structural schematic diagram of a driving circuit provided in an embodiment of the present application;

[0022] Figure 5 is a circuit diagram of a driving circuit provided in the third embodiment of the present application;

[0023] Figure 6 is a circuit diagram of a driving circuit provided in a fourth embodiment of the present application;

[0024] Figure 7 is a circuit diagram of a driving circuit provided in a fifth embodiment of the present application;

[0025] Figure 8 It is a flowchart of the driving method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0027] The present application provides a driving circuit and a driving method. By setting a current adjustment module and adjusting the size of the driving current, the color deviation problem of the display screen caused by grayscale changes can be solved. The following are detailed descriptions. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments. In addition, in the description of the present application, the term "including" means "including but not limited to". The terms "first", "second", "third", etc. are used only as labels to distinguish different objects, rather than to describe a specific order.

[0028] The transistors used in all embodiments of the present application may be thin film transistors or field effect transistors or other devices with the same characteristics. Since the source and drain of the transistors used here are symmetrical, their source and drain are interchangeable. In the embodiments of the present application, in order to distinguish the two poles of the transistor other than the gate, one of the source and the drain is called the first electrode, and the other of the source and the drain is called the second electrode. According to the form in the accompanying drawings, the middle end of the switching transistor is defined as the gate, the signal input end is the source, and the output end is the drain. In addition, the transistors used in the embodiments of the present application are N-type transistors or P-type transistors, wherein the N-type transistor is turned on when the gate is at a high potential and is turned off when the gate is at a low potential; the P-type transistor is turned on when the gate is at a low potential and is turned off when the gate is at a high potential. In the embodiments of the present application, the light-emitting device D may be Mini-LED or Micro-LED.

[0029] See also Figure 1 and Figure 2 , Figure 1 A schematic diagram of a first structure of a driving circuit provided in an embodiment of the present application; Figure 2 is a circuit diagram of a driving circuit provided in the first embodiment of the present application. Figure 1As shown, the embodiment of the present application provides a driving circuit 100, including: a light-emitting module 10, a power module 20, a first driving module 30, a current adjustment module 40, and a control module 50, wherein the power module 20 is electrically connected to the first driving module 30 and the current adjustment module 40, the first driving module 30 is electrically connected to the current adjustment module 40 and the control module 50, and the light-emitting module 10 is electrically connected to the current adjustment module 40; the light-emitting module 10 emits light based on the driving current; the power module 20 is used to transmit a first voltage to the first driving module 30 and the current adjustment module 40; the control module 50 is used to output a first control signal and transmit it to the first driving module 30; the first driving module 30 is used to adjust the first voltage to a second voltage under the control of the first control signal and transmit it to the current adjustment module 40; the current adjustment module 40 is used to control the magnitude of the driving current based on the driving voltage.

[0030] The driving circuit provided in the present application can solve the problem of color deviation of the display image caused by grayscale changes by setting a current adjustment module 40 to adjust the magnitude of the driving current.

[0031] In the embodiment of the present application, the current adjustment module 40 includes a first transistor T1, a second transistor T2, a third transistor T3 and a first resistor R1, a second resistor R2, and a third resistor R3. The first electrode of the first transistor T1 is electrically connected to the first driving module 30, the second electrode of the first transistor T1 is electrically connected to the input end of the first resistor R1, the gate of the first transistor T1 is electrically connected to the power module 20, and the output end of the first resistor R1 is electrically connected to the light-emitting module 10; the first electrode of the second transistor T2 is electrically connected to the first driving module 30, the second electrode of the second transistor T2 is electrically connected to the input end of the second resistor R2, the gate of the second transistor T2 is electrically connected to the power module 20, and the output end of the second resistor R2 is electrically connected to the light-emitting module 10; the first electrode of the third transistor T3 is electrically connected to the first driving module 30, the second electrode of the third transistor T3 is electrically connected to the input end of the third resistor R3, the gate of the third transistor T3 is electrically connected to the power module 20, and the output end of the third resistor R3 is electrically connected to the light-emitting module 10. Preferably, the pixel corresponding to any one of the first transistor T1 , the second transistor T2 and the third transistor T3 is a red pixel, a green pixel or a blue pixel.

[0032] In the embodiment of the present application, the light-emitting module 10 includes a first light-emitting device D1, a second light-emitting device D2, and a third light-emitting device D3. The input end of the first light-emitting device D1 is electrically connected to the output end of the first resistor R1, the input end of the second light-emitting device D2 is electrically connected to the output end of the second resistor R2, and the input end of the third light-emitting device D3 is electrically connected to the output end of the third resistor R3.

[0033] In the embodiment of the present application, the control module 50 may be a timing controller. Specifically, the control module 50 outputs a first control signal according to the grayscale value of each sub-pixel in the image data and the duty cycle of the pulse width modulation signal, wherein the first control signal is provided to the first driving module 30. The first driving module 30 is connected to a plurality of data lines, and is used to transmit a second voltage corresponding to the first control signal to the current regulating module via the data lines. Specifically, the control module 50 obtains the first grayscale value of each pixel R (red), G (green), and B (blue) in the image data, and then determines the second grayscale value of each pixel R (red), G (green), and B (blue) in the display area according to the detected duty cycle of the pulse width modulation signal, compares the first grayscale value with the second grayscale value, and outputs a first control signal to the first driving module 30 according to the comparison result. The first driving module 30 outputs a driving voltage to the current regulating module 40 under the control of the first control signal, and the current regulating module 40 adjusts the driving current of the corresponding light-emitting device to compensate for the first grayscale value of the pixel, thereby compensating for the problem of color cast of the white light source in the grayscale change.

[0034] In the embodiment of the present application, the first electrode of the first transistor T1, the first electrode of the second transistor T2, and the first electrode of the third transistor T3 are electrically connected to the first node; the power module 20 is electrically connected to the gate of the first transistor T1, the gate of the second transistor T2, and the gate of the third transistor T3 in a one-to-one correspondence. Specifically, the power module 20 is connected to a plurality of scan lines to provide a first voltage, and the power module 20 sequentially scans the plurality of scan lines in each frame period to select the corresponding thin film transistors.

[0035] In the embodiment of the present application, the first transistor T1, the second transistor T2, and the third transistor T3 are all transistors of the same type. Specifically, they can be one or more of a low-temperature polysilicon thin film transistor, an oxide semiconductor thin film transistor, an amorphous silicon thin film transistor, and a field effect transistor. Among them, the resistance values ​​of the first resistor R1, the second resistor R2, and the third resistor R3 can be the same or different. Those skilled in the art can set and debug according to actual needs to select a suitable resistance value, which is not limited in this application.

[0036] In the embodiment of the present application, the magnitude of the driving current output by the current adjustment module 40 is affected by the first voltage, the internal resistance of the thin film transistor when it is turned on, and the resistance value of the resistor connected in series between the thin film transistor and the light emitting device. Specifically, the magnitude of the driving current is:

[0037]

[0038] Among them, I out represents the driving current, VDD represents the first voltage, R dsRepresents the internal resistance of the thin film transistor when it is turned on, R i (i=1, 2, 3, . . . ) represents the resistance value of the resistor connected in series between the thin film transistor and the light emitting device.

[0039] Specifically, the current adjustment module 40 controls R by adjusting the first voltage of the gate transistor. ds Since the voltage between the drain and source of the thin film transistor is small, the gate voltage of the thin film transistor is controlled to make the thin film transistor enter the variable resistance area, and the size of the driving current flowing through the corresponding light emitting device is adjusted by setting the resistor corresponding to the thin film transistor in the current adjustment module 40. For example, when the first voltage is small, the thin film transistor cannot be fully turned on. At this time, the current is small, R ds Larger, on the contrary, the current is larger, R ds Smaller.

[0040] As a specific implementation of this application, please refer to Figure 1 and Figure 3 , Figure 3 is a circuit diagram of a driving circuit provided in the second embodiment of the present application. Figure 3 As shown, the present application provides a driving circuit 200, and the difference between the driving circuit 200 and the driving circuit 100 is that: the first driving module 30 is electrically connected to the first electrode of the first transistor T1, the first electrode of the second transistor T2, and the first electrode of the third transistor T3 in a one-to-one correspondence; the gate of the first transistor T1, the gate of the second transistor T2, and the gate of the third transistor T3 are electrically connected to the first node. Specifically, the first driving module 30 is connected to a plurality of data lines, and is used to transmit the second voltage corresponding to the first control signal to the selected thin film transistors in the current regulation module via the data lines.

[0041] In the embodiment of the present application, the driving circuit 200 also includes: a light-emitting module 10, a power module 20, a first driving module 30, a current adjustment module 40, and a control module 50. The power module 20 is electrically connected to the first driving module 30 and the current adjustment module 40, the first driving module 30 is electrically connected to the current adjustment module 40 and the control module 50, and the light-emitting module 10 is electrically connected to the current adjustment module 40.

[0042] In the embodiment of the present application, the light-emitting module 10 includes a first light-emitting device D1, a second light-emitting device D2, and a third light-emitting device D3. The input end of the first light-emitting device D1 is electrically connected to the output end of the first resistor R1, the input end of the second light-emitting device D2 is electrically connected to the output end of the second resistor R2, and the input end of the third light-emitting device D3 is electrically connected to the output end of the third resistor R3.

[0043] In the embodiment of the present application, the current adjustment module 40 includes a first transistor T1, a second transistor T2, a third transistor T3 and a first resistor R1, a second resistor R2, and a third resistor R3. The first resistor R1 is connected in series between the first transistor T1 and the first light-emitting device D1; the second resistor R2 is connected in series between the second transistor T2 and the second light-emitting device D2; and the third resistor R3 is connected in series between the third transistor T3 and the third light-emitting device D3.

[0044] The driving circuit 200 provided in the present application can solve the problem of color deviation of the display image caused by grayscale changes by disposing a current adjustment module 40 to adjust the magnitude of the driving current.

[0045] As a specific implementation of this application, please refer to Figure 4 and Figure 5 , Figure 4 is a second structural schematic diagram of a driving circuit provided in an embodiment of the present application; Figure 5 is a circuit diagram of a driving circuit provided in the third embodiment of the present application. Figure 4 As shown, the present application provides a driving circuit 300. The difference between the driving circuit 300 and the driving circuit 100 is that the driving circuit also includes a second driving module 60, and the second driving module 60 is electrically connected to the light-emitting module 10 and the control module 50; the control module 50 is also used to output a second control signal and transmit it to the second driving module 60, and the second driving module 60 is used to control the conduction or cutoff of the light-emitting module 10 under the control of the second control signal.

[0046] In the embodiment of the present application, the second driving module 60 is electrically connected to the output end of the first light emitting device D1 , the output end of the second light emitting device D2 , and the output end of the third light emitting device D3 in a one-to-one correspondence.

[0047] In the embodiment of the present application, the first electrode of the first transistor T1, the first electrode of the second transistor T2 and the first electrode of the third transistor T3 are electrically connected to the first node; the gate of the first transistor T1, the gate of the second transistor T2 and the gate of the third transistor T3 are electrically connected to the second node.

[0048] In the embodiment of the present application, the driving circuit 300 also includes: a light-emitting module 10, a power module 20, a first driving module 30, a current adjustment module 40, and a control module 50. The power module 20 is electrically connected to the first driving module 30 and the current adjustment module 40, the first driving module 30 is electrically connected to the current adjustment module 40 and the control module 50, and the light-emitting module 10 is electrically connected to the current adjustment module 40; the light-emitting module 10 emits light based on the driving current; the power module 20 is used to transmit the first voltage to the first driving module 30 and the current adjustment module 40; the control module 50 is used to output a first control signal and transmit it to the first driving module 30; the first driving module 30 is used to adjust the first voltage to a second voltage under the control of the first control signal and transmit it to the current adjustment module 40; the current adjustment module 40 is used to control the magnitude of the driving current based on the first voltage and the second voltage.

[0049] In the embodiment of the present application, the current adjustment module 40 includes a first transistor T1, a second transistor T2, a third transistor T3 and a first resistor R1, a second resistor R2, and a third resistor R3. The first resistor R1 is connected in series between the first transistor T1 and the first light-emitting device D1; the second resistor R2 is connected in series between the second transistor T2 and the second light-emitting device D2; and the third resistor R3 is connected in series between the third transistor T3 and the third light-emitting device D3.

[0050] In the embodiment of the present application, the light-emitting module 10 includes a first light-emitting device D1, a second light-emitting device D2, and a third light-emitting device D3. The input end of the first light-emitting device D1 is electrically connected to the output end of the first resistor R1, the input end of the second light-emitting device D2 is electrically connected to the output end of the second resistor R2, and the input end of the third light-emitting device D3 is electrically connected to the output end of the third resistor R3.

[0051] In the embodiment of the present application, the second driving module 60 is used for the local dimming function. If the output end of the light emitting device is directly grounded, the light emitting device will light up once there is voltage at the input end of the light emitting device. The output end of the light emitting device is connected to the input end of the second driving module 60 and further grounded. In this way, the local dimming function can be achieved by controlling the conduction or disconnection of the input end of the second driving module 60, and by cooperating with the current adjustment module 40, the color deviation problem of the display screen caused by grayscale changes can be solved.

[0052] As a specific implementation of this application, please refer to Figure 4 and Figure 6 , Figure 6 is a circuit diagram of a driving circuit provided in the fourth embodiment of the present application. Figure 6As shown, the present application provides a driving circuit 400, the difference between the driving circuit 400 and the driving circuit 300 is that: the first electrode of the first transistor T1, the first electrode of the second transistor T2 and the first electrode of the third transistor T3 are electrically connected to the first node; and the power supply module 20 is electrically connected to the gate of the first transistor T1, the gate of the second transistor T2 and the gate of the third transistor T3 in a one-to-one correspondence.

[0053] In the embodiment of the present application, the driving circuit 400 also includes: a light-emitting module 10, a power module 20, a first driving module 30, a current adjustment module 40, a control module 50 and a second driving module 60, the second driving module 60 is electrically connected to the light-emitting module 10 and the control module 50; the control module 50 is also used to output a second control signal and transmit it to the second driving module 60, the second driving module 60 is used to control the conduction or cutoff of the light-emitting module 10 under the control of the second control signal, the power module 20 is electrically connected to the first driving module 30 and the current adjustment module 40, the first driving module 30 is electrically connected to the current adjustment module 40 and the control module 50, and the light-emitting module 10 is electrically connected to the current adjustment module 40.

[0054] In the embodiment of the present application, the light-emitting module 10 includes a first light-emitting device D1, a second light-emitting device D2, and a third light-emitting device D3. The input end of the first light-emitting device D1 is electrically connected to the output end of the first resistor R1, the input end of the second light-emitting device D2 is electrically connected to the output end of the second resistor R2, and the input end of the third light-emitting device D3 is electrically connected to the output end of the third resistor R3.

[0055] In the embodiment of the present application, the current adjustment module 40 includes a first transistor T1, a second transistor T2, a third transistor T3 and a first resistor R1, a second resistor R2, and a third resistor R3. The first resistor R1 is connected in series between the first transistor T1 and the first light-emitting device D1; the second resistor R2 is connected in series between the second transistor T2 and the second light-emitting device D2; and the third resistor R3 is connected in series between the third transistor T3 and the third light-emitting device D3.

[0056] The driving circuit 400 provided in the present application can solve the problem of color deviation of the display image caused by grayscale changes by setting a current adjustment module 40 to adjust the magnitude of the driving current.

[0057] As a specific implementation of this application, please refer to Figure 4 and Figure 7 , Figure 7 is a circuit diagram of a driving circuit provided in the fifth embodiment of the present application. Figure 7As shown, the present application provides a driving circuit 500, and the difference between the driving circuit 500 and the driving circuit 300 is that: the first driving module 30 is electrically connected to the first electrode of the first transistor T1, the first electrode of the second transistor T2, and the first electrode of the third transistor T3 in a one-to-one correspondence; the gate of the first transistor T1, the gate of the second transistor T2, and the gate of the third transistor T3 are electrically connected to the second node.

[0058] In the embodiment of the present application, the driving circuit 500 also includes: a light-emitting module 10, a power module 20, a first driving module 30, a current adjustment module 40, a control module 50 and a second driving module 60, the second driving module 60 is electrically connected to the light-emitting module 10 and the control module 50; the control module 50 is also used to output a second control signal and transmit it to the second driving module 60, the second driving module 60 is used to control the conduction or cutoff of the light-emitting module 10 under the control of the second control signal, the power module 20 is electrically connected to the first driving module 30 and the current adjustment module 40, the first driving module 30 is electrically connected to the current adjustment module 40 and the control module 50, and the light-emitting module 10 is electrically connected to the current adjustment module 40.

[0059] In the embodiment of the present application, the light-emitting module 10 includes a first light-emitting device D1, a second light-emitting device D2, and a third light-emitting device D3. The input end of the first light-emitting device D1 is electrically connected to the output end of the first resistor R1, the input end of the second light-emitting device D2 is electrically connected to the output end of the second resistor R2, and the input end of the third light-emitting device D3 is electrically connected to the output end of the third resistor R3.

[0060] In the embodiment of the present application, the current adjustment module 40 includes a first transistor T1, a second transistor T2, a third transistor T3 and a first resistor R1, a second resistor R2, and a third resistor R3. The first resistor R1 is connected in series between the first transistor T1 and the first light-emitting device D1; the second resistor R2 is connected in series between the second transistor T2 and the second light-emitting device D2; and the third resistor R3 is connected in series between the third transistor T3 and the third light-emitting device D3.

[0061] The driving circuit 400 provided in the present application can solve the problem of color deviation of the display image caused by grayscale changes by setting a current adjustment module 40 to adjust the magnitude of the driving current.

[0062] See also Figure 8 , Figure 8 is a schematic diagram of the process of the driving method provided in the embodiment of the present application. Figure 8 As shown, the present application provides a driving method, which is applied to the above-mentioned driving circuit, including:

[0063] S10, the power module 20 is used to transmit the first voltage to the first driving module 30 and the current adjustment module 40;

[0064] S20, the control module 50 outputs a first control signal and transmits it to the first driving module 30; under the control of the first control signal, the first driving module 30 adjusts the first voltage to a second voltage and transmits it to the current adjustment module 40;

[0065] S30 , the current adjustment module 40 controls the magnitude of the driving current based on the first voltage and the second voltage; the light emitting module 10 emits light based on the driving current.

[0066] The present application provides a driving circuit and a driving method, the driving circuit includes a light-emitting module 10, a power module 20, a first driving module 30, a current adjustment module 40, and a control module 50, the power module 20 is electrically connected to the first driving module 30 and the current adjustment module 40, the first driving module 30 is electrically connected to the current adjustment module 40 and the control module 50, and the light-emitting module 10 is electrically connected to the current adjustment module 40; the light-emitting module 10 emits light based on the driving current; the power module 20 is used to control the magnitude of the driving voltage and transmit the driving voltage to the first driving module 30 and the current adjustment module 40; the control module 50 is used to output a first control signal and transmit it to the first driving module 30; the first driving module 30 is used to adjust the first voltage to a second voltage under the control of the first control signal and transmit it to the current adjustment module 40; the current adjustment module 40 is used to control the magnitude of the driving current based on the driving voltage. The driving circuit provided in the present application can solve the color deviation problem of the display screen caused by grayscale changes and improve the display effect by setting the current adjustment module 40 to adjust the magnitude of the driving current.

[0067] The above is a detailed introduction to a driving circuit and a driving method provided in an embodiment of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A driving circuit, characterized in that: It includes: a light-emitting module, a power module, a first driving module, a current adjustment module, and a control module, wherein the power module is electrically connected to the first driving module and the current adjustment module, the first driving module is electrically connected to the current adjustment module and the control module, and the light-emitting module is electrically connected to the current adjustment module; The light emitting module emits light based on the driving current; The power supply module is used to transmit the first voltage to the first driving module and the current adjustment module; The power module is connected to the plurality of scan lines; The control module is used to output a first control signal and transmit it to the first driving module; The first driving module is used for adjusting the first voltage to a second voltage and transmitting the second voltage to the current adjustment module under the control of the first control signal; The first driving module is connected to the plurality of data lines; The current adjustment module is used to control the magnitude of the driving current based on the first voltage and the second voltage; Wherein, the current adjustment module includes a first transistor and a first resistor; the first electrode of the first transistor is electrically connected to the first driving module, the second electrode of the first transistor is electrically connected to the input end of the first resistor, the gate of the first transistor is electrically connected to the power supply module, and the output end of the first resistor is electrically connected to the light-emitting module.

2. The driving circuit according to claim 1, characterized in that: The current adjustment module further includes a second transistor, a third transistor, a second resistor, and a third resistor. The first electrode of the second transistor is electrically connected to the first driving module, the second electrode of the second transistor is electrically connected to the input end of the second resistor, the gate of the second transistor is electrically connected to the power module, and the output end of the second resistor is electrically connected to the light emitting module; The first electrode of the third transistor is electrically connected to the first driving module, the second electrode of the third transistor is electrically connected to the input end of the third resistor, the gate of the third transistor is electrically connected to the power module, and the output end of the third resistor is electrically connected to the light-emitting module.

3. The driving circuit according to claim 2, characterized in that: The light-emitting module includes a first light-emitting device, a second light-emitting device, and a third light-emitting device. The input end of the first light-emitting device is electrically connected to the output end of the first resistor, the input end of the second light-emitting device is electrically connected to the output end of the second resistor, and the input end of the third light-emitting device is electrically connected to the output end of the third resistor.

4. The driving circuit according to claim 3, characterized in that: The first electrode of the first transistor, the first electrode of the second transistor and the first electrode of the third transistor are electrically connected to a first node; The power supply module is electrically connected to the gate of the first transistor, the gate of the second transistor and the gate of the third transistor in a one-to-one correspondence.

5. The driving circuit according to claim 3, characterized in that: The first driving module is electrically connected to the first electrode of the first transistor, the first electrode of the second transistor, and the first electrode of the third transistor in a one-to-one correspondence; A gate of the first transistor, a gate of the second transistor, and a gate of the third transistor are electrically connected to a first node.

6. The driving circuit according to claim 3, characterized in that: The driving circuit further includes a second driving module, which is electrically connected to the light emitting module and the control module; The control module is further used to output a second control signal and transmit it to the second driving module, and the second driving module is used to control the on or off of the light emitting module under the control of the second control signal.

7. The driving circuit according to claim 6, characterized in that: The second driving module is electrically connected to the output end of the first light emitting device, the output end of the second light emitting device, and the output end of the third light emitting device in a one-to-one correspondence.

8. The driving circuit according to claim 7, characterized in that: The first electrode of the first transistor, the first electrode of the second transistor and the first electrode of the third transistor are electrically connected to a first node; A gate of the first transistor, a gate of the second transistor, and a gate of the third transistor are electrically connected to a second node.

9. The driving circuit according to claim 7, characterized in that: The first electrode of the first transistor, the first electrode of the second transistor and the first electrode of the third transistor are electrically connected to a first node; and the power module is electrically connected to the gate of the first transistor, the gate of the second transistor and the gate of the third transistor respectively in a one-to-one correspondence; or, The first driving module is electrically connected to the first electrode of the first transistor, the first electrode of the second transistor and the first electrode of the third transistor respectively in a one-to-one correspondence; the gate of the first transistor, the gate of the second transistor and the gate of the third transistor are electrically connected to a second node.

10. A driving method, applied to the driving circuit according to any one of claims 1 to 9, characterized in that: include: The power supply module transmits the first voltage to the first driving module and the current adjustment module; The control module outputs a first control signal and transmits it to the first driving module; Under the control of the first control signal, the first driving module adjusts the first voltage to a second voltage and transmits the second voltage to the current adjustment module; The current adjustment module controls the magnitude of the driving current based on the first voltage and the second voltage, and the light-emitting module emits light based on the driving current.

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