Driving circuit, driving method and display device of display panel

Abstract

The application discloses a display panel driving circuit, a driving method and a display device. The driving circuit comprises a time sequence controller, a detection circuit and a power supply circuit. The time sequence controller is used for detecting a data signal of the display panel and outputting a first control signal to the detection circuit when the data signal meets a preset condition. The detection circuit is used for detecting light intensity of the display panel after receiving the first control signal and outputting a second control signal to the power supply circuit when the light intensity is lower than a preset value. The power supply circuit is used for receiving the second control signal, reading a preset common voltage value in a storage module and outputting the preset common voltage value as a common voltage signal to the display panel. The preset condition is that the data signal changes between a maximum value and a minimum value at least once. The above scheme can improve liquid crystal polarization, avoid liquid crystal molecule reverse deviation and cause flickering and other problems.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a driving circuit, driving method and display device for a display panel. Background Technology

[0002] Liquid crystal displays (LCDs) are increasingly favored as the mainstream display medium in various fields of modern society. With the improvement of people's living standards, the display quality of LCDs is also receiving more and more attention. LCDs have advantages such as being thin, light, small, low-power, and low-heat. LCDs generate optical responses, or grayscale responses, by applying a driving voltage to the liquid crystal molecules on the display device. Due to the limitations of the inherent properties of liquid crystal molecules, their display requires a large portion of a frame's time, and for static images, the liquid crystal molecules are prone to polarization because they maintain the same bias state for a long time.

[0003] Currently, the main method to improve this is polarity reversal. However, polarity reversal requires liquid crystal molecules to deflect back and forth multiple times. In particular, the switching between the two extreme states at the maximum deflection angle takes a long time and can easily damage the liquid crystal properties, causing passivation and other phenomena. Moreover, it can cause liquid crystal molecules to flip and deviate under intermediate voltage conditions, resulting in flickering and other problems. Summary of the Invention

[0004] The purpose of this application is to provide a driving circuit, driving method and display device for a display panel to improve liquid crystal polarization and avoid problems such as liquid crystal molecule inversion and deviation, which cause flickering.

[0005] This application discloses a driving circuit for a display panel, comprising: a timing controller, a detection circuit, and a power supply circuit. The timing controller detects data signals of the display panel and outputs a first control signal to the detection circuit when the data signals meet a preset condition. The detection circuit receives the first control signal and then detects the light intensity of the display panel. When the light intensity is lower than a preset value, it outputs a second control signal to the power supply circuit. The power supply circuit receives the second control signal, reads a preset common voltage value from a storage module, and outputs the preset common voltage value as a common voltage signal to the display panel. The preset condition is when the data signal changes back and forth at least once between its maximum and minimum values.

[0006] Optionally, the detection circuit includes a light sensor circuit, which includes a photoresistor. The photoresistor receives light passing through the liquid crystal of the display panel and changes its resistance according to the light intensity. When the photoresistor value is lower than a threshold, the detection circuit outputs a second control signal to the power supply circuit.

[0007] Optionally, the detection circuit further includes a comparator. The positive input terminal of the optical sensor circuit is connected to the first control signal, the negative input terminal of the optical sensor circuit is grounded, and the output terminal of the optical sensor circuit is connected to the first input terminal of the comparator. The optical sensor circuit generates a preset amplification factor based on the photoresistor value. The optical sensor circuit receives the first control signal, amplifies the first control signal by a preset factor according to the preset amplification factor, and outputs it to the first input terminal of the comparator. A preset voltage value is input to the second input terminal of the comparator. When the first control signal amplified by the preset factor is less than the preset voltage value, the comparator outputs a second control signal to the power supply circuit. The preset value is the preset voltage value.

[0008] Optionally, the photoresistor is disposed within the display area of ​​the display panel; or disposed on one side of the light-emitting surface of the display panel.

[0009] Optionally, the display panel includes multiple display zones; multiple detection circuits are provided, and the timing controller detects the data signals of the multiple display zones. When a display zone meets a preset condition, a first control signal is output to the detection circuit corresponding to the display zone. The detection circuit detects the light intensity within the corresponding display zone. When the light intensity is lower than a preset value, a second control signal is output to the power supply circuit. The power supply circuit controls the output of a preset common voltage value to the corresponding display zone. The power supply circuit includes multiple output ports, which are respectively connected to the multiple display zones to provide a common voltage signal to the multiple display zones.

[0010] Optionally, the preset common voltage value includes at least two different preset common voltage values; the display area of ​​the display panel includes a central area and a peripheral area, the peripheral area being arranged around the central area; at least one of the multiple display partitions is located in the central area, and at least one of the multiple display partitions is located in the peripheral area; wherein, the preset common voltage value of the display partition located in the central area is different from that of the display partition located in the peripheral area.

[0011] Optionally, the preset condition is when the data signal changes back and forth at least three times between the maximum and minimum values.

[0012] Optionally, when the data signal detected by the timing controller does not conform to the preset condition or the light intensity detected by the detection circuit is higher than the preset value, the power supply circuit outputs a first common voltage value as a common voltage signal to the display panel; the difference between the first common voltage value and the preset voltage value is within ±1V.

[0013] This application also discloses a method for driving a display panel, including the following steps:

[0014] Detect data signals from the display panel;

[0015] When the data signal meets the preset conditions, the first control signal is output to the detection circuit;

[0016] After receiving the first control signal, the detection circuit detects the light intensity of the display panel. When the light intensity is lower than a preset value, it outputs a second control signal to the power supply circuit.

[0017] The power supply circuit receives the second control signal, reads the preset common voltage value in the storage module, and outputs the preset common voltage value as a common voltage signal to the display panel.

[0018] When the data signal does not meet the preset conditions or when the light intensity detected by the detection circuit is higher than the preset value, the control power supply circuit outputs the first common voltage value as the common voltage signal to the display panel.

[0019] The preset condition is when the data signal changes back and forth at least once between the maximum and minimum values.

[0020] This application also discloses a display device, which includes a display panel and a driving circuit for the display panel, wherein the driving circuit drives the display panel to display.

[0021] This application uses a timing controller to detect data signals. When a switching between maximum and minimum values ​​is detected, a detection circuit is activated to monitor the light intensity emitted by the display panel. Low light intensity indicates potential or impending polarization of the liquid crystal, leading to weaker light. To address this, the application reads a preset common voltage value stored in a memory module via a power supply circuit and outputs it as a common voltage signal to the display panel. Driven by this preset common voltage value, when the data signal switches between maximum and minimum values, the normal common voltage value is switched to the preset common voltage value. This ensures different paths during the switching process, mitigating the inertia of liquid crystal molecules caused by identical paths during switching. This prevents the liquid crystal properties from being easily damaged and avoids the problem of liquid crystal molecules easily flipping and deviating under intermediate voltage conditions, causing flickering. This application improves the flickering problem by adjusting the common voltage value based on the deflection of liquid crystal molecules when the data signal switches between maximum and minimum values. Attached Figure Description

[0022] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0023] Figure 1 This is a schematic diagram of a display panel according to this application;

[0024] Figure 2 This is a schematic diagram of the detection circuit of this application;

[0025] Figure 3 This is a schematic diagram of the driving circuit of the display panel according to the second embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the first type of display partition of the display panel in this application;

[0027] Figure 5 This is a schematic diagram of the second type of display zone of the display panel in this application;

[0028] Figure 6 This is a schematic diagram illustrating the steps of the driving method for the display panel in this application;

[0029] Figure 7 This is a schematic diagram of a display device according to this application.

[0030] Among them, 10 is the display device; 11 is the display panel; 12 is the central area; 13 is the peripheral area; 14 is the display zone; 100 is the driving circuit; 110 is the timing controller; 120 is the detection circuit; 121 is the light sensor circuit; 122 is the photoresistor; 123 is the comparator; 130 is the power supply circuit; and Vref is the preset voltage value. Detailed Implementation

[0031] It should be understood that the terminology, specific structural and functional details used herein are merely for describing particular embodiments and are representative. However, this application may be implemented in many alternative forms and should not be construed as being limited to the embodiments set forth herein.

[0032] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of technical features indicated. Therefore, unless otherwise stated, a feature specified as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. Furthermore, terms indicating orientation or positional relationships, such as "upper," "lower," "left," "right," "vertical," and "horizontal," are described based on the orientation or relative positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description of this application, not indicating that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments.

[0034] Figure 1 This is a schematic diagram of a display panel according to this application. See also: Figure 1 As shown, this application discloses a driving circuit for a display panel. The driving circuit 100 includes a timing controller 110, a detection circuit 120, and a power supply circuit 130. The timing controller 110 is used to detect the data signal of the display panel 11. When the data signal meets a preset condition, it outputs a first control signal to the detection circuit 120. The detection circuit 120 is used to receive the first control signal and then detect the light intensity of the display panel 11. When the light intensity is lower than a preset value, it outputs a second control signal to the power supply circuit 130. The power supply circuit 130 is used to receive the second control signal, read a preset common voltage value from the storage module, and output the preset common voltage value as a common voltage signal to the display panel 11. The preset condition is when the data signal changes back and forth at least once between the maximum and minimum values.

[0035] This application uses a timing controller 110 to detect data signals. When a switching between maximum and minimum values ​​is detected, a detection circuit 120 is activated to detect the light intensity emitted by the display panel 11. A low light intensity indicates that the liquid crystal may be polarized or is about to polarize, resulting in weaker light. To address this, the application uses a power supply circuit 130 to read a preset common voltage value stored in a storage module and outputs it as a common voltage signal to the display panel 11. Driven by this preset common voltage value, when the data signal switches between maximum and minimum values, the normal common voltage value is switched to the preset common voltage value. This ensures different paths during the switching process, mitigating the inertia of liquid crystal molecules caused by identical paths during switching, thus preventing damage to liquid crystal properties and avoiding flickering caused by liquid crystal molecules easily flipping and deviating under intermediate voltage conditions. This application improves the flicker problem by adjusting the common voltage value based on the deflection of liquid crystal molecules when the data signal switches between maximum and minimum values.

[0036] It is understandable that data signals switch back and forth between their maximum and minimum values, including the following situations. First, taking grayscale as an example, when the data signal rapidly switches between grayscale 255 and grayscale 0, this generally occurs during customer testing, where deliberately inputting fast-switching or regular fast-switching images. This situation causes liquid crystal molecules to fluctuate between the maximum deflection angle and no deflection, which, if repeated frequently, can easily lead to polarization. In this application, the maximum deflection angle can be reduced by adjusting the common voltage value, i.e., outputting a preset common voltage value in-plane, and switching from the no-deflection state to a micro-deflection state. The difference between the preset common voltage value and the regular common voltage value is within ±1V, thereby achieving fine-tuning of the common voltage and avoiding liquid crystal polarization.

[0037] Secondly, taking voltage as an example, especially data voltage with polarity reversal, if the common voltage value is 0V, then the data voltage has a positive voltage greater than 0V and a negative voltage less than 0V. The maximum data voltage is the maximum positive voltage, and the minimum data voltage is the minimum negative voltage, satisfying the condition that the absolute value of the difference between the maximum data voltage and the common voltage value is equal to the absolute value of the difference between the minimum data voltage and the common voltage value. In this case, the liquid crystal molecules need to be deflected from the maximum positive angle to the maximum negative angle. During this process, the unbiased state is used as an intermediate state, resulting in the positive bias angle being equal to the negative bias angle. This leads to passivation of the liquid crystal due to multiple deflections, causing problems such as image retention. This application achieves fine-tuning of the common voltage value by adjusting it to a preset common voltage value, which differs from the conventional common voltage value by within ±1V, thereby avoiding liquid crystal polarization.

[0038] Third, taking a static image as an example, although the displayed image remains unchanged, the liquid crystal molecules will be reverse-biased. That is, the liquid crystal molecules are forward-biased in the first frame and reverse-biased in the second frame. When there are multiple forward and reverse biases, the liquid crystal molecules will also exhibit polarization. This application can also solve the problem of polarity reversal. Generally speaking, the larger the angle, the more severe the phenomenon. Therefore, this application targets polarity reversal between the maximum and minimum values. However, it is understandable that this application is applicable to the problem of liquid crystal molecule polarization in static images.

[0039] It is understandable that the timing controller 110 can detect changes in the data signal. This detection is achieved through an algorithm and is a function inherent to the timing controller 110 itself. However, in this application, to avoid a single round trip of the data signal from minimum to maximum value, or one or two such changes within a short period, this application can be designed so that the preset condition is at least three round trips between the maximum and minimum values. For example, to address situations where a specific input data signal changes between maximum and minimum values ​​during customer or testing processes, it can be designed to change four to five times or more.

[0040] Specifically, the detection circuit 120 includes a light sensor circuit 121, which includes a photoresistor 122. The photoresistor 122 receives light passing through the liquid crystal from the display panel 11 and changes its resistance according to the light intensity. When the value of the photoresistor 122 is lower than the threshold, the detection circuit 120 outputs a second control signal to the power supply circuit 130.

[0041] In this application, in addition to using a timing controller 110 to detect changes in the data signal, the more important aspect is the use of a photoresistor 122 to detect the light passing through the liquid crystal. When the liquid crystal becomes polarized or experiences deflection hysteresis, it often leads to a decrease in light intensity. In this embodiment, only the photoresistor 122 is used to detect the light passing through the liquid crystal. When light of different intensities enters the photoresistor 122, different resistance changes occur. This resistance change is detected by the detection circuit 120. When the value of the photoresistor 122 is low, a preset common voltage is output to the in-plane to improve the liquid crystal deflection. This application primarily achieves this by fine-tuning the common voltage, ensuring that the difference between the preset common voltage value and the conventional common voltage value is within ±1V. The key point is to prevent the liquid crystal from being biased at the same angle. For example, when the preset common voltage value is 1V greater than the conventional common voltage value, the bias angle decreases during forward bias and increases during reverse bias. Although this may cause some display differences, it avoids problems such as liquid crystal polarization during the process.

[0042] It is understandable that this threshold needs to be calculated or experimentally determined based on the actual situation. This is because different similar display panels 11 have different liquid crystal driving methods, such as VA-type vertical driving and IPS-type twist driving. This application mainly focuses on the VA-type vertical driving method. In this driving method, the pixel electrode and the common electrode are respectively set on the substrate on both sides of the liquid crystal molecules to form a vertical driving method.

[0043] The photoresistor 122 can be disposed on the color filter substrate, and the corresponding detection circuit 120 can also be disposed on the color filter substrate, and disposed within the display area of ​​the display panel 11; disposed on one side of the light-emitting surface of the display panel 11. For the touch display panel 11, in this embodiment the photoresistor 122 is disposed on the touch layer, and the corresponding detection circuit 120 can also be disposed on the touch layer.

[0044] This application primarily utilizes a photoresistor 122 as the main photosensitive sensor, but this approach is also applicable to other types of photosensitive sensors. The main function of this photosensitive sensor is to verify whether the liquid crystal in this area of ​​the display panel 11 has experienced slight polarization or sluggish response.

[0045] Understandably, in an extreme case, this application may not require the detection circuit 120 to determine whether the liquid crystal molecules have begun to polarize. In the detection process, a switch can be directly set to turn on during the detection process. When the timing controller 110 detects that the data signal has gone back and forth from the minimum value to the maximum value 3 times or more, it directly drives the preset common voltage value to drive it.

[0046] See Figure 2 As shown, Figure 2 This is a schematic diagram of the detection circuit of this application. The detection circuit 120 further includes a comparator 123. The positive input terminal of the light sensor circuit 121 is connected to the first control signal. The negative input terminal and REF pin of the light sensor circuit 121 are grounded. The output terminal of the light sensor circuit 121 is connected to the first input terminal of the comparator 123. The light sensor circuit 121 generates a preset amplification factor according to the value of the photoresistor 122. The light sensor circuit 121 receives the first control signal, amplifies the first control signal by a preset factor according to the preset amplification factor, and outputs it to the first input terminal of the comparator 123.

[0047] The second input terminal of the comparator 123 receives a preset voltage value Vref; when the first control signal after being amplified by a preset factor is less than the preset voltage value Vref, the comparator 123 outputs a second control signal to the power supply circuit 130; wherein, the preset value is the preset voltage value Vref.

[0048] This embodiment is a specific circuit for detecting when the value of the photoresistor 122 is lower than the threshold. The resistance value of the photoresistor 122 is converted into a voltage value using a comparator 123. The gain formula for the light sensor circuit 121 is: In this circuit, LDR represents the value of photoresistor 122. The circuit converts the measured value of photoresistor 122 into a voltage. If the liquid crystal molecules are polarized or slightly polarized, the light transmitted through the liquid crystal is reduced, and LDR increases. According to the formula above, Vout will decrease. By keeping the input Vin constant, the light transmittance of the liquid crystal molecules can be reflected solely by the change in the resistance of photoresistor 122. In practical applications, a voltage comparator 123 is added after the Vout output, and a preset voltage value Vref is set. When the Vout output voltage value is less than the preset voltage value Vref, comparator 123 outputs a second control signal to the power supply circuit 130. Alternatively, comparator 123 outputs a high-level second control signal to the power supply circuit 130. When the corresponding interface or pin of the power supply circuit 130 receives a high-level signal, it reads the pre-stored preset common voltage value from the storage module. Thus, at the instant the detected data signal matches the preset condition, the preset common voltage value output is initiated.

[0049] Generally, the output value of the common voltage is set directly through the I2C interface and stored in the storage module. The level of the common voltage is generally fixed until the timing controller 110 detects that the voltage of the panel data signal changes back and forth between the maximum value (Max) and the minimum value (Min). This is monitored by the light sensor circuit 121, and the output Vout of the comparator 123 controls the power supply circuit 130 or the Power IC to output the preset common voltage value. When the timing controller 110 detects that the panel data signal does not meet the requirement of changing back and forth between the Max and Min voltages, the timing controller 110 outputs a low-level first control signal, controlling the power supply circuit 130 to output the normal VCOM value.

[0050] In this embodiment, multiple preset common voltage values ​​can be set and stored in the storage module. Different preset common voltage values ​​can be selected and called according to the actual situation.

[0051] Example 2:

[0052] Figure 3 This is a schematic diagram of the driving circuit of the display panel according to the second embodiment of this application. Figure 4 This is a schematic diagram of the first type of display partition of the display panel in this application. Figure 5 This is a schematic diagram of the second type of display zone of the display panel in this application. See [link / reference]. Figure 3-5As shown, the display panel 11 includes multiple display zones 14; multiple detection circuits 120 are provided, and the timing controller 110 detects the data signals of the multiple display zones 14. When the display zone 14 meets the preset conditions, a first control signal is output to the detection circuit 120 corresponding to the display zone 14. The detection circuit 120 detects the light intensity in the corresponding display zone 14. When the light intensity is lower than the preset value, a second control signal is output to the power supply circuit 130. The power supply circuit 130 controls the output of a preset common voltage value to the corresponding display zone 14.

[0053] The power supply circuit 130 includes multiple output ports, which are respectively connected to multiple display partitions 14, and provide a common voltage signal to each of the multiple display partitions 14.

[0054] In this embodiment, multiple detection circuits 120 are provided for each display zone 14, mainly because different display zones 14, such as the central zone 12 and the peripheral zone 13, require different common electrodes. Therefore, detection circuits 120 are provided for different zones to detect the light intensity of different display zones 14. Of course, in one solution, only one detection circuit 120 can be provided to predict the condition of the entire display area, but considering that a detection circuit 120 is provided for each display zone 14, the different conditions of different display zones 14 can be detected, and compensation processing can be performed separately.

[0055] Each display partition 14 is provided with an interconnected common electrode, which is used to transmit a common voltage signal. The common electrodes of adjacent display partitions 14 are not interconnected. The common voltage of different display partitions 14 is driven by multiple output ports of the power supply circuit 130.

[0056] Specifically, the preset common voltage value includes at least two different preset common voltage values; the display area of ​​the display panel 11 includes a central area 12 and a peripheral area 13, the peripheral area 13 being arranged around the central area 12; at least one of the plurality of display partitions 14 is located in the central area 12, and at least one of the plurality of display partitions 14 is located in the peripheral area 13; wherein, the preset common voltage value of the display partition 14 located in the central area 12 is different from that of the display partition 14 located in the peripheral area 13.

[0057] Specifically, the minimum number of display partitions 14 is two, namely a central area 12 and a peripheral area 13, with the peripheral area 13 surrounding the central area 12.

[0058] In another embodiment, the plurality of display partitions 14 include a plurality of display partitions 14 disposed in the central area 12 and a plurality of display partitions 14 disposed in the peripheral area 13;

[0059] In this design, after careful consideration, the peripheral area 13 of the display panel 11 is more prone to phenomena such as liquid crystal molecule polarization. Moreover, unlike the central area 12, the peripheral area 13 is more susceptible to problems such as mura, making the potential for problems in the peripheral area 13 more complex.

[0060] In this embodiment, the multiple display zones 14 can be divided into a central zone 12 and a peripheral zone 13. When the central zone 12 and the peripheral zone 13 detect conditions that meet preset criteria, and the detection circuit 120 also meets the conditions, the common voltage values ​​read by the central zone 12 and the peripheral zone 13 are different, and compensation is performed on the common voltage of the central zone 12 and the peripheral zone 13 respectively. It is worth mentioning that the solution of this application can be used during factory testing, or it can be adjusted during normal use after the product is shipped, thus having a wide range of applications.

[0061] Example 3:

[0062] Figure 6 This is a schematic diagram illustrating the steps of the driving method for the display panel in this application. See [link / reference]. Figure 6 As shown, this application also discloses a method for driving a display panel, including the following steps:

[0063] S100: Detects data signals from the display panel;

[0064] S200: When the data signal meets the preset conditions, a first control signal is output to the detection circuit;

[0065] S300: After receiving the first control signal, the detection circuit detects the light intensity of the display panel. When the light intensity is lower than a preset value, it outputs a second control signal to the power supply circuit.

[0066] S400: The power supply circuit receives the second control signal, reads the preset common voltage value in the storage module, and outputs the preset common voltage value as a common voltage signal to the display panel.

[0067] S500: When the data signal does not meet the preset condition or the light intensity detected by the detection circuit is higher than the preset value, the control power supply circuit outputs the first common voltage value as the common voltage signal to the display panel.

[0068] The preset condition is when the data signal changes back and forth at least once between the maximum and minimum values.

[0069] This application uses a timing controller to detect data signals. When a switching between maximum and minimum values ​​is detected, a detection circuit is activated to monitor the light intensity emitted by the display panel. Low light intensity indicates potential or impending polarization of the liquid crystal, leading to weaker light. To address this, the application reads a preset common voltage value stored in a memory module via a power supply circuit and outputs it as a common voltage signal to the display panel. Driven by this preset common voltage value, when the data signal switches between maximum and minimum values, the normal common voltage value is switched to the preset common voltage value. This ensures different paths during the switching process, mitigating the inertia of liquid crystal molecules caused by identical paths during switching. This prevents the liquid crystal properties from being easily damaged and avoids the problem of liquid crystal molecules easily flipping and deviating under intermediate voltage conditions, causing flickering. This application improves the flickering problem by adjusting the common voltage value based on the deflection of liquid crystal molecules when the data signal switches between maximum and minimum values.

[0070] The preset condition is that the data signal changes back and forth at least three times between the maximum and minimum values. In this application, to avoid a single round trip of the data signal from minimum to maximum value, or one or two such changes within a short period, the preset condition can be designed so that the data signal changes back and forth at least three times between the maximum and minimum values.

[0071] Example 4:

[0072] Figure 7 This is a schematic diagram of a display device according to this application. See also: Figure 6 As shown, as a fourth embodiment of this application, this application also discloses a display device 10, which includes a display panel 11 and a driving circuit 100 for the display panel as described in any of the above embodiments. The driving circuit 100 drives the display panel 11 to display. In this embodiment, the display device includes various types of LCD display devices, and also includes touch display devices, etc.

[0073] It should be noted that the inventive concept of this application can form many embodiments, but due to the limited space of the application documents, they cannot all be listed. Therefore, without conflict, the embodiments described above or the technical features can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effect will be enhanced.

[0074] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. A drive circuit of a display panel, characterized by, The application relates to a display panel and a display panel control method. The application comprises: a timing controller for detecting a data signal of the display panel, and outputting a first control signal to a detection circuit when the data signal meets a preset condition; a detection circuit for detecting light intensity of the display panel after receiving the first control signal, and outputting a second control signal to a power supply circuit when the light intensity is lower than a preset value; a power supply circuit for receiving the second control signal, reading a preset common voltage value in a storage module, and outputting the preset common voltage value as a common voltage signal to the display panel. The preset condition is that the data signal changes at least once between a maximum value and a minimum value. The detection circuit comprises a light sensor circuit, the light sensor circuit comprises a photosensitive resistor, the photosensitive resistor receives light passing through liquid crystal of the display panel, and the photosensitive resistor changes resistance according to light intensity, the detection circuit outputs the second control signal to the power supply circuit when the photosensitive resistor value is lower than a threshold value. The detection circuit further comprises a comparator. A positive input end of the light sensor circuit is connected to the first control signal, a negative input end of the light sensor circuit is grounded, and an output end of the light sensor circuit is connected to a first input end of the comparator. The light sensor circuit generates a preset amplification multiple according to the photosensitive resistor value, the light sensor circuit receives the first control signal, amplifies the first control signal by the preset amplification multiple, and then outputs the first control signal to the first input end of the comparator. A second input end of the comparator inputs a preset voltage value, and the comparator outputs the second control signal to the power supply circuit when the first control signal amplified by the preset amplification multiple is smaller than the preset voltage value. The preset value is the preset voltage value.

2. The driving circuit of the display panel according to claim 1, wherein The photosensitive resistor is arranged in a display area of the display panel and on one side of a light-emitting surface of the display panel.

3. The driving circuit of the display panel according to claim 1, wherein The display panel comprises a plurality of display partitions, and the detection circuit comprises a plurality of detection circuits. The timing controller detects data signals of the plurality of display partitions, outputs the first control signal to the detection circuits corresponding to the display partitions when the display partitions meet the preset condition, the detection circuits detect light intensity in the display partitions corresponding to the display partitions, output the second control signal to the power supply circuit when the light intensity is lower than the preset value, and the power supply circuit controls output of the preset common voltage value to the display partitions. The power supply circuit comprises a plurality of output ports connected to the plurality of display partitions, and provides the common voltage signal to the plurality of display partitions.

4. The driving circuit of the display panel according to claim 3, wherein The preset common voltage value comprises at least two different preset common voltage values. The display area of the display panel comprises a central area and a peripheral area, and the peripheral area surrounds the central area. At least one display partition of the plurality of display partitions is located in the central area, and at least one display partition of the plurality of display partitions is located in the peripheral area. The preset common voltage value of the display partition located in the central area is different from that of the display partition located in the peripheral area.

5. The driving circuit of the display panel according to claim 1, wherein The preset condition is that the data signal changes at least three times between a maximum value and a minimum value.

6. The driving circuit of a display panel according to claim 1, wherein When the time sequence controller detects that the data signal does not conform to the preset condition or the detection circuit detects that the light intensity is higher than the preset value, the power supply circuit outputs the first common voltage value as the common voltage signal to the display panel. The difference between the first common voltage value and the preset voltage value is within 1V.

7. A drive circuit of a display panel, characterized by comprising: The display device comprises a display panel and a driving circuit of the display panel according to any one of claims 1-8, and the driving circuit drives the display panel to display. The time sequence controller is used for detecting the data signal of the display panel, and outputs the first control signal to the detection circuit when the data signal conforms to the preset condition. The detection circuit is used for detecting the light intensity of the display panel after receiving the first control signal, and outputs the second control signal to the power supply circuit when the light intensity is lower than the preset value. The power supply circuit is used for receiving the second control signal, reading the preset common voltage value in the storage module, and outputting the preset common voltage value as the common voltage signal to the display panel. The preset condition is that the data signal changes at least once between the maximum value and the minimum value. The display panel comprises a plurality of display partitions, and the detection circuit is provided with a plurality of The time sequence controller detects the data signals of a plurality of display partitions, and outputs the first control signal to the detection circuit corresponding to the display partition when the display partition conforms to the preset condition. The detection circuit detects the light intensity in the display partition corresponding to the display partition, and outputs the second control signal to the power supply circuit when the light intensity is lower than the preset value. The power supply circuit controls the output of the preset common voltage value to the corresponding display partition. The power supply circuit comprises a plurality of output ports connected to a plurality of display partitions, respectively, and provides a common voltage signal for a plurality of display partitions. The preset common voltage value comprises at least two different preset common voltage values.

8. The driving circuit of the display panel according to claim 7, wherein, The display area of the display panel comprises a center area and a peripheral area, and the peripheral area is arranged around the center area. At least one of the plurality of display partitions is located in the center area, and at least one of the plurality of display partitions is located in the peripheral area. The preset common voltage value of the display partition located in the center area is different from that of the display partition located in the peripheral area. The display device comprises a display panel and a driving circuit of the display panel according to any one of claims 1-8, and the driving circuit drives the display panel to display.

9. A display device, characterized by comprising: ​

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