WO2024036869A1 - Driving circuit, driving method, and display apparatus - Google Patents

Abstract

A driving circuit, a driving method, and a display apparatus. The driving circuit comprises a control chip (100) and a driving chip (200) connected to each other. The driving circuit further comprises a sampling module (300) and a processing module (400). The sampling module (300) is used for collecting the output current of the driving chip (200) and converting same into a first voltage. The processing module (400) comprises a comparison unit (410), an analysis unit (420) and a compensation unit (430). The comparison unit (410) is used for comparing the first voltage with a threshold voltage. The analysis unit (420) is used for analyzing the comparison result of the comparison unit (410). The compensation unit (430) is used for updating a compensation parameter according to the analysis result of the analysis unit (420) and outputting the compensation parameter to the control chip (100). The driving circuit can mitigate or eliminate the regional mura phenomenon.

Description

Driving circuit, driving method and display device

This application claims priority to the Chinese patent application filed with the China Patent Office on August 15, 2022, with the application number 2022109765198 and the application name "Driving Circuit, Driving Method and Display Device", the entire content of which is incorporated into this application by reference. middle.

Technical field

The present application belongs to the field of display, and specifically relates to a driving circuit, a driving method and a display device.

Background technique

The statements herein merely provide background information related to the present application and do not necessarily constitute prior art.

When a Mini/Micro LED display panel displays the same grayscale image, theoretically each mini LED produces the same brightness. However, due to process and other reasons, there are actual differences between each mini LED. When the driving device drives one or more rows or one or more columns of mini-LEDs, there will be bright and dark lines, which will be reflected on the display panel, resulting in uneven regional lighting (ie: mura), affecting the display effect.

Contents of the invention

The purpose of this application is to provide a driving circuit, a driving method and a display device to improve or eliminate display unevenness and enhance display quality.

In order to achieve the above purpose, the present application provides a driving circuit, including a control chip and a driving chip connected to each other. The control chip is used to control the driving chip according to the compensation parameters. The driving chip is used to generate an output current to drive the light-emitting chip. The drive circuit also includes:

A sampling module, used to collect the output current of the driver chip and convert it into a first voltage;

A processing module, including a comparison unit, an analysis unit and a compensation unit. The comparison unit is used to compare the first voltage and the threshold voltage. The analysis unit is used to analyze the comparison result of the comparison unit. The compensation unit is used to The compensation parameter is updated according to the analysis result of the analysis unit and the first voltage and output to the control chip.

This application also provides a driving method, including:

Collect the output current of the driver chip and convert it into the first voltage;

Compare the first voltage with the threshold voltage and output the comparison result;

Compare the comparison results with preset conditions;

When it is confirmed that the comparison result meets the preset condition, the compensation parameter is updated according to the first voltage and output to the control chip.

This application also provides a display device, including:

light emitting chip;

A driving circuit, the driving chip of the driving circuit is connected to the light-emitting chip.

The driving circuit, driving method and display device disclosed in this application have the following beneficial effects:

In this application, the control chip is used to control the driver chip according to the compensation parameters, the driver chip is used to generate an output current to drive the light-emitting chip, the sampling module is used to collect the output current of the driver chip and convert it into a first voltage, and the processing module includes a comparison unit, an analysis unit unit and a compensation unit. The comparison unit is used to compare the first voltage and the threshold voltage. The analysis unit is used to analyze the comparison result of the comparison unit. For example, the first voltage exceeds the threshold voltage. The compensation unit performs compensation based on the first voltage and updates the compensation parameters. , and then output the updated compensation parameters to the control chip. The control chip controls the driver chip according to the updated compensation parameters, increasing the output current generated by the driver chip so that it approaches the ideal driving current of the light-emitting chip. When the driver chip drives one or more rows of mini-LEDs, it can eliminate obvious bright and dark lines and reflect them on the display panel, which can improve or eliminate uneven regional lighting and improve display quality.

Additional features and advantages of the invention will be apparent from the detailed description which follows, or, in part, may be learned by practice of the invention.

It should be understood that the above general description and the following detailed description are only exemplary and do not limit the present application.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of a driving circuit in Embodiment 1 of the present application.

Figure 2 is a schematic structural diagram of a processing module in Embodiment 1 of the present application.

Figure 3 is a flow chart of the driving method in Embodiment 2 of the present application.

Figure 4 is a comparison diagram of the output current of the driver chip before and after compensation in Embodiment 2 of the present application.

FIG. 5 is a schematic diagram of the waveform of the first voltage in Embodiment 2 of the present application.

Figure 6 is a schematic diagram of the square wave signal output by the comparison unit in Embodiment 2 of the present application.

Figure 7 is the corresponding relationship between the number of compensation times and the compensation coefficient in Embodiment 2 of the present application.

FIG. 8 is a schematic structural diagram of a display device in Embodiment 3 of the present application.

Embodiments of the invention

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concepts of the example embodiments. To those skilled in the art.

Furthermore, the described features, structures or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the present application. However, those skilled in the art will appreciate that the technical solutions of the present application may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other instances, well-known methods, apparatus, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the present application.

The present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted here that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, but should not be construed as limiting the present application.

Embodiment 1

Referring to Figures 1 and 2, the driving circuit in this embodiment includes a control chip 100 and a driving chip 200 connected to each other. The control chip 100 is used to control the driving chip 200 according to the compensation parameters. The driving chip 200 is used to generate an output current to drive light emission. Chips, light-emitting chips include mini light-emitting diodes.

The driving circuit also includes a sampling module 300 and a processing module 400. The sampling module 300 is used to collect the output current of the driving chip 200 and convert it into a first voltage. The processing module 400 includes a comparison unit 410, an analysis unit 420, and a compensation unit 430. The comparison unit 410 is used to compare the first voltage and the threshold voltage, the analysis unit 420 is used to analyze the comparison result of the comparison unit 410, and the compensation unit 430 is used to calculate the first voltage according to the analysis unit 410. The analysis results of 420 and the first voltage update the compensation parameters and output them to the control chip 100 .

It should be noted that the light-emitting chip includes mini-light-emitting diodes, but is not limited thereto. The light-emitting chip may also include light-emitting diodes, organic light-emitting diodes, etc., depending on the situation. The light-emitting chip includes a mini light-emitting diode. The mini light-emitting diode is driven by current. The sampling module 300 is used to collect the output current of the driving chip 200. However, it is not limited to this. When the light-emitting chip is driven by voltage, the sampling module 300 can be configured to collect the driving chip 200. The output voltage depends on the situation.

Since each mini light-emitting diode has certain differences, and the ideal driving current and the actual driving current of the mini-light-emitting diode are also different, it is difficult for the output current of the driving chip 200 to adapt to each mini-light-emitting diode. At the same time, there is a certain line loss in the driving current, and the output current of the driving chip 200 is usually less than the ideal driving current of the mini light-emitting diode. This embodiment only takes increasing the output current of the driving chip 200 as an example. When the output current of the driving chip 200 When the current is greater than the ideal driving current of the mini light-emitting diode, the output current of the driving chip 200 can be reduced accordingly, so no further details will be given.

In this embodiment, the control chip 100 is used to control the driver chip 200 according to the compensation parameters, the driver chip 200 is used to generate an output current to drive the light-emitting chip, and the sampling module 300 is used to collect the output current of the driver chip 200 and convert it into a first voltage, and process The module 400 includes a comparison unit 410, an analysis unit 420, and a compensation unit 430. The comparison unit 410 is used to compare the first voltage and the threshold voltage. The analysis unit 420 is used to analyze the comparison result of the comparison unit 410. For example, the first voltage is less than the threshold voltage, and the compensation unit 430 is used to compare the first voltage and the threshold voltage. The unit 430 performs compensation based on the first voltage and updates the compensation parameters, and then outputs the updated compensation parameters to the control chip 100. The control chip 100 controls the driver chip 200 according to the updated compensation parameters to increase the output current generated by the driver chip 200. , making it approach the ideal driving current of the light-emitting chip. When the driver chip 200 drives one or more rows of mini light-emitting diodes, it can eliminate obvious bright and dark lines and reflect them on the display panel, which can improve or eliminate uneven regional lighting and improve display quality.

For example, as shown in FIGS. 1 and 2 , the sampling module 300 includes a resistor, and the first voltage is equal to the voltage across the resistor. The output current of the driver chip 200 is collected through the resistor, and at the same time, the output current of the driver chip 200 is converted into the voltage across the resistor, that is, the first voltage.

It should be noted that the mini light-emitting diode is driven by current, and the sampling module 300 is used to collect the output current of the driver chip 200 and convert the output current into a first voltage. The first voltage is used for comparison with the threshold voltage, but is not limited to this. , the sampling module 300 can also directly collect the output current of the driver chip 200, and the comparison unit 410 is configured to compare the output current of the driver chip 200 with the threshold current, depending on the situation.

The sampling module 300 includes a resistor, through which the output current of the driver chip 200 is collected, and at the same time, the output current of the driver chip 200 is converted into a voltage across the resistor, that is, a first voltage. The comparison unit 410 compares the first voltage with the threshold voltage. When the voltage is less than the threshold voltage, the first voltage is compensated. Compared with directly comparing the output current of the driver chip 200 with the threshold current, converting the current into voltage for comparison is easier to implement and the circuit structure is simpler.

Referring to Figures 1 and 2, the comparison unit 410 includes a non-inverting input terminal, an inverting input terminal and an output terminal. The non-inverting input terminal is connected to a voltage source, and the voltage source connection provides a threshold voltage; the inverting input terminal is connected to the sampling module 300. The sampling module 300 outputs the first voltage to the inverting input terminal; the output terminal is connected to the analysis unit 420, and the comparison result is output to the analysis unit 420. The comparison unit 410 includes a comparator, and the comparison result output by the comparator is a square wave signal.

It should be noted that when the sampling module 300 outputs the first voltage, the comparison unit 410 may include a comparator, but is not limited thereto. The comparison unit 410 may also include an operational amplifier, depending on the situation. When the sampling module 300 directly collects the output current of the driver chip 200, the comparison unit 410 can also be configured to compare the output current of the driver chip 200 with the threshold current, depending on the situation.

The comparison unit 410 compares the first voltage and the threshold voltage. Compared with directly comparing the output current and the threshold current of the driver chip 200, converting the current into a voltage for comparison is easier to implement and the circuit structure is simpler. In addition, when the sampling module 300 outputs the first voltage, the comparison unit 410 may include a comparator, and the sampling comparator compares the first voltage and the threshold voltage. Compared with using an operational amplifier to compare the first voltage and the threshold voltage, the comparator is designed as High-speed switches have faster slew rates and shorter delays than op amps.

Referring to Figures 1 and 2, the compensation unit 430 includes a compensator 431 and a converter 432. The compensator 431 is used to compensate the first voltage to generate a second voltage according to the analysis result of the analysis unit 420 and the first voltage. The converter 431 432 converts the second voltage into a compensation parameter and outputs it to the control chip 100 . The compensation parameter is a digital signal, and the first voltage and the second voltage are analog signals. The converter 432 converts the second voltage into a compensation current, and then performs digital-to-analog conversion to generate the compensation parameter. The control chip 100 controls the driver chip 200 according to the compensation parameter to improve The output current generated by the driving chip 200 is close to the ideal driving current of the light-emitting chip.

It should be noted that the converter 432 converts the second voltage into a compensation current, and then performs digital-to-analog conversion to generate compensation parameters. The control chip 100 controls the driver chip 200 according to the compensation parameters, but is not limited to this. The driver chip is directly collected in the sampling module 300 When the output current is 200, the comparison unit 410 is configured to compare the output current and the threshold current of the driver chip 200. The compensator 431 is used to compensate the output current of the driver chip 200 to generate a compensation current, and then performs digital-to-analog conversion to generate compensation parameters. The details can be seen in It depends.

The compensator 431 is used to compensate the first voltage to generate a second voltage according to the analysis result of the analysis unit 420 and the first voltage. The converter 432 converts the second voltage into a compensation current, then performs digital-to-analog conversion to generate compensation parameters, and compensates The parameters are output to the control chip 100, and the output current generated by the driver chip 200 is adjusted in real time so that it approaches the ideal driving current of the light-emitting chip, which can quickly eliminate uneven light emission, avoid obvious bright and dark lines observed by the human eye, and improve display quality. .

Embodiment 2

As shown in Figure 3, the driving method in this embodiment includes the following steps:

S100: Collect the output current of the driver chip 200 and convert it into a first voltage;

S200: Compare the first voltage and the threshold voltage and output the comparison result;

S300: Compare the comparison result with the preset conditions;

S400: When it is confirmed that the comparison result meets the preset conditions, the compensation parameters are updated according to the first voltage and output to the control chip 100.

The driving circuit in the first embodiment is used to execute the driving method in this embodiment. The sampling module 300 collects the output current of the driving chip 200 and converts it into a first voltage. The comparison unit 410 compares the first voltage with the threshold voltage and outputs the comparison result. Analysis The unit 420 compares the comparison result with the preset condition, and confirms whether the comparison result satisfies the preset condition. When confirming whether the comparison result satisfies the preset condition, the compensation unit 430 updates the compensation parameter according to the first voltage and outputs it to the control chip 100, The control chip 100 controls the driver chip 200 according to the updated compensation parameters to increase the output current generated by the driver chip 200 so that it approaches the ideal driving current of the light-emitting chip. Referring to FIG. 4 , before compensation, the output current of the driving chip 200 deviates from the ideal driving current. After compensation, the output current of the driving chip 200 approaches the ideal driving current. When the driver chip 200 drives one or more rows of mini light-emitting diodes, it can eliminate obvious bright and dark lines and reflect them on the display panel, which can improve or eliminate uneven regional lighting and improve display quality.

When it is confirmed that the comparison result meets the preset conditions in step S400, updating the compensation parameters according to the first voltage includes:

When it is confirmed that the comparison result meets the preset conditions, the compensation count is updated;

Select a compensation coefficient to compensate the first voltage to generate a second voltage according to a preset corresponding relationship, where the preset corresponding relationship is the corresponding relationship between the number of compensation times and the compensation coefficient;

Convert the second voltage into a compensation parameter and output it to the control chip.

The compensation unit 430 includes a compensator 431 and a converter 432. The compensator 431 selects a compensation coefficient according to a preset corresponding relationship to compensate the first voltage to generate a second voltage. The converter 432 converts the second voltage into a compensation current, and then performs digital-to-analog processing. The conversion generates compensation parameters and outputs them to the control chip 100 .

When it is confirmed that the comparison result meets the preset conditions, the compensation count is updated. The compensator 431 compensates the first voltage to generate a second voltage according to the preset corresponding relationship. The converter 432 converts the second voltage into a compensation current, and then performs digital-to-analog conversion. Compensation parameters are generated and output to the control chip 100. The control chip 100 controls the driver chip 200 according to the updated compensation parameters to increase the output current generated by the driver chip 200. Since the sampling module 300 continues to sample the output current, the comparator will also continue to compare the first A voltage and a threshold voltage. When the analysis unit 420 confirms that the comparison result meets the preset conditions, the compensation count will be updated again. The compensation unit 430 will compensate the first voltage again and update the second voltage and compensation parameters until the comparison result is no longer the same. When the preset conditions are met and the first voltage does not exceed the threshold voltage, the output current of the driver chip 200 approaches the ideal driving current.

The waveform of the first voltage is as shown in Figure 5. The comparison unit 410 includes a comparator, which compares the first voltage with the threshold voltage and outputs a square wave signal, as shown in Figure 6. The analysis unit 420 compares the comparison result with the preset condition, and confirms whether the comparison result satisfies the preset condition. The preset condition is that the duty cycle of the square wave signal is greater than 1% or the number of square wave signals in one frame is greater than 5.

The square wave signal output by the comparator meets one of two conditions: the duty cycle is greater than 1% or the number of square wave signals in one frame is greater than 5, indicating that the first voltage exceeds the threshold voltage, and at the same time, the output current of the driver chip 200 is consistent with the ideal drive The current difference is large, and the output current of the driver chip 200 needs to be compensated again. By analyzing whether the square wave signal output by the comparator meets the preset conditions, it is indirectly determined whether the first voltage exceeds the threshold voltage and the difference between the output current of the driver chip 200 and the ideal drive current. The judgment method is simpler and easier to implement.

In some embodiments, the compensation unit 430 stores multiple compensation times and multiple compensation coefficients. The number of compensation times and the compensation coefficients are in one-to-one correspondence to form a preset correspondence relationship. The compensation coefficients are selected according to the preset correspondence relationship to compensate the first voltage. Generating the second voltage includes:

When the compensation count is equal to one of the compensation times, a compensation coefficient corresponding to the compensation times is selected and multiplied with the first voltage to compensate the first voltage.

As an example, the corresponding relationship between the number of compensation times and the compensation coefficient is shown in Figure 7. The multiple times of compensation are integers from 1 to 8, and the compensation coefficients are X, 5X, 10X, 15X, 20X, 25X, 30X and 35X, where X is greater than 0.

When it is confirmed that the comparison result meets the preset conditions, the compensation count is updated. When the compensation count is 1, the compensation coefficient is The voltage is X times the first voltage; when the analysis unit 420 confirms again that the comparison result meets the preset condition, and when the compensation count is 2, the second voltage is 5X times the first voltage.

When the compensation count is equal to one of the compensation times, a compensation coefficient corresponding to the number of compensation times is selected and multiplied with the first voltage to compensate the first voltage to generate a second voltage. The first voltage is multiplied to compensate. When the output current of the driver chip 200 The drive current approaches the ideal speed faster, which can quickly eliminate uneven lighting, avoid obvious bright and dark lines observed by the human eye, and improve display quality.

In some embodiments, updating the compensation count includes incrementing the compensation count by 1, that is, each time the analysis unit 420 confirms that the comparison result meets the preset condition, the compensation count is incremented by 1. There is a corresponding relationship between the compensation count and the compensation coefficient. After the compensation count is updated, when compensating the first voltage, the compensation unit 430 will correspondingly select the compensation coefficient corresponding to the compensation count for compensation.

It should be noted that updating the compensation count includes adding 1 to the compensation count, but is not limited to this. Updating the compensation count may also include adding or subtracting 1 to the compensation count.

When it is confirmed that the comparison result meets the preset conditions, the compensation count is updated, and the compensation count is incremented by 1 each time, that is, the compensation coefficients X, 5X, 10X, 15X, 20X, 25X, 30X and 35X are selected in order to compensate the first voltage. , the first voltage is gradually increased, and the output current of the driver chip 200 is gradually increased to approach the ideal driving current. When it is confirmed that the comparison result meets the preset conditions, the compensation count is updated. Each time the compensation count is updated, the compensation count is decremented by 1. That is, the compensation coefficients 35X, 30X, 25X, 20X, 15X, 10X, 5X and X are selected in order to compensate the first voltage. , the first voltage is gradually reduced, and the output current of the driving chip 200 can also be gradually reduced to approach the ideal driving current.

Embodiment 3

Referring to FIG. 8 , the display device in this embodiment includes a light-emitting chip 500 and a driving circuit. The driving circuit includes the driving circuit in Embodiment 1. The driving chip 200 of the driving circuit is connected to the light-emitting chip 500 .

It should be noted that the light-emitting chip 500 includes mini-light-emitting diodes, but is not limited thereto. The light-emitting chip 500 may also include light-emitting diodes, organic light-emitting diodes, etc., depending on the situation.

The display device includes the drive circuit in the first embodiment. The control chip 100 in the drive circuit is used to control the drive chip 200 according to the compensation parameters. The drive chip 200 is used to generate an output current to drive the light-emitting chip 500. The sampling module 300 is used to collect the output of the drive chip 200. The current is converted into a first voltage. The processing module 400 includes a comparison unit 410, an analysis unit 420 and a compensation unit 430. The comparison unit 410 is used to compare the first voltage and the threshold voltage, and the analysis unit 420 is used to analyze the comparison result of the comparison unit 410. For example, if the first voltage is less than the threshold voltage, the compensation unit 430 compensates and updates the compensation parameters based on the first voltage, and then outputs the updated compensation parameters to the control chip 100. The control chip 100 controls the driver chip 200 according to the updated compensation parameters. , increasing the output current generated by the driving chip 200 so that it approaches the ideal driving current of the light-emitting chip 500 . When the driver chip 200 drives one or more rows of mini-light-emitting diodes, it can eliminate obvious bright and dark lines and reflect them on the display panel, which can improve or eliminate uneven regional lighting and improve the image quality of the display device.

The terms "first", "second", etc. are used for descriptive purposes only and shall not be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, features defined by "first," "second," etc. may explicitly or implicitly include one or more of such features. In the description of this application, "plurality" means two or more than two, unless otherwise explicitly and specifically limited.

In this application, unless otherwise clearly stated and limited, the terms "assembly", "connection" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection. A connection can also be an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In the description of this specification, reference to the description of the terms "some embodiments," "exemplarily," etc. means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment of the present application or in the example. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other.

Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are illustrative and cannot be understood as limitations of the present application. Those of ordinary skill in the art can make modifications to the above-mentioned embodiments within the scope of the present application. The embodiments are subject to changes, modifications, substitutions and modifications, so any changes or modifications made in accordance with the claims and description of this application shall be within the scope of the patent of this application.

Claims (13)

A driving circuit includes a control chip and a driving chip connected to each other. The control chip is used to control the driving chip according to the compensation parameters. The driving chip is used to generate an output current to drive the light-emitting chip. It is characterized in that the driving circuit also include: A sampling module, used to collect the output current of the driver chip and convert it into a first voltage; A processing module, including a comparison unit, an analysis unit and a compensation unit. The comparison unit is used to compare the first voltage and the threshold voltage. The analysis unit is used to analyze the comparison result of the comparison unit. The compensation unit is used to The compensation parameter is updated according to the analysis result of the analysis unit and the first voltage and output to the control chip. The driving circuit according to claim 1, characterized in that the compensation unit includes a converter and a compensator, the compensator is used to calculate the first voltage according to the analysis result of the analysis unit and the first voltage. Compensation is performed to generate a second voltage, and the converter converts the second voltage into the compensation parameter and outputs it to the control chip. The driving circuit according to claim 2, wherein the comparison unit includes a comparator, the comparator includes a non-inverting input terminal, an inverting input terminal and an output terminal, and the first voltage is output to the inverting input terminal. input terminal, the threshold voltage is output to the non-inverting input terminal, the comparison result is output to the analysis unit, and the comparison result is a square wave signal. The driving circuit according to claim 1, wherein the sampling module includes a resistor, and the first voltage is equal to the voltage across the resistor. A driving method is characterized by including: Collect the output current of the driver chip and convert it into the first voltage; Compare the first voltage with the threshold voltage and output the comparison result; Compare the comparison results with preset conditions; When it is confirmed that the comparison result meets the preset condition, the compensation parameter is updated according to the first voltage and output to the control chip. The driving method according to claim 5, wherein when confirming that the comparison result meets a preset condition, updating the compensation parameter according to the first voltage includes: When it is confirmed that the comparison result meets the preset conditions, the compensation count is updated; Select a compensation coefficient to compensate the first voltage to generate a second voltage according to a preset corresponding relationship, where the preset corresponding relationship is the corresponding relationship between the number of compensation times and the compensation coefficient; Convert the second voltage into the compensation parameter and output it to the control chip. The driving method according to claim 6, characterized in that the compensation unit stores a plurality of the compensation times and a plurality of the compensation coefficients, and the compensation times and the compensation coefficients are in one-to-one correspondence to form the Preset correspondence relationship, selecting a compensation coefficient according to the preset correspondence relationship to compensate the first voltage to generate the second voltage includes: When the compensation count is equal to one of the compensation times, the compensation coefficient corresponding to the compensation times is selected and multiplied with the first voltage to compensate the first voltage. The driving method according to claim 6, wherein updating the compensation count includes: The compensation count increases or decreases by 1. The driving method according to claim 5, characterized in that the comparison result is a square wave signal, and the preset condition is that the duty cycle of the square wave signal is greater than 1% or the number of square wave signals in one frame is greater than 5 . A display device, characterized in that it includes: light emitting chip; Drive circuit, the drive chip of the drive circuit is connected to the light-emitting chip, the drive circuit includes a control chip and a drive chip connected to each other, the control chip is used to control the drive chip according to the compensation parameters, the drive chip is used to Generate output current to drive the light-emitting chip, characterized in that the driving circuit further includes: A sampling module, used to collect the output current of the driver chip and convert it into a first voltage; A processing module, including a comparison unit, an analysis unit and a compensation unit. The comparison unit is used to compare the first voltage and the threshold voltage. The analysis unit is used to analyze the comparison result of the comparison unit. The compensation unit is used to The compensation parameter is updated according to the analysis result of the analysis unit and the first voltage and output to the control chip. The display device according to claim 10, characterized in that the compensation unit includes a converter and a compensator, the compensator is used to calculate the first voltage according to the analysis result of the analysis unit and the first voltage. Compensation is performed to generate a second voltage, and the converter converts the second voltage into the compensation parameter and outputs it to the control chip. The display device according to claim 11, wherein the comparison unit includes a comparator, the comparator includes a non-inverting input terminal, an inverting input terminal and an output terminal, and the first voltage is output to the inverting input terminal. input terminal, the threshold voltage is output to the non-inverting input terminal, the comparison result is output to the analysis unit, and the comparison result is a square wave signal. The display device according to claim 10, wherein the sampling module includes a resistor, and the first voltage is equal to the voltage across the resistor.

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