Display panel driving method and display panel

Abstract

The present invention relates to the field of display technology, and in particular to a display panel driving method and a display panel. The display panel driving method measures the current ambient temperature of the area where the display panel is located by adding a temperature compensation module to the display panel, and directly calls a set of eye diagram parameters corresponding to the current ambient temperature in a storage module through a timing control module. Finally, a driving module drives the display panel according to the eye diagram parameters, thereby achieving efficient driving of the display panel under different environments. The storage module stores multiple sets of eye diagram parameters, and the multiple sets of eye diagram parameters correspond one-to-one to multiple temperature intervals, thereby saving time in adjusting the driving signal when driving the display panel, avoiding the problem of poor display quality caused by the display screen of the display panel being affected by the environment in the prior art, and improving the efficiency of driving the display panel.

Description

Technical Field

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

[0002] Currently, in order to improve the display quality of the display panel, the eye diagram parameters are pre-debugged to obtain an eye diagram signal that can adapt to different temperatures and improve the quality of the display image. However, in reality, the display panel is greatly affected by the ambient temperature and cannot adapt to all temperature environments through a set of set eye diagram parameters. As a result, the display image quality cannot reach the optimal level, and the user experience is poor. Summary of the Invention

[0003] The main purpose of the present invention is to provide a display panel driving method and a display panel, aiming to solve the problem in the prior art that the display image of the display panel is affected by the environment and the display quality is poor.

[0004] To achieve the above objectives, the present invention provides a display panel driving method, wherein the display panel includes a timing control module, a storage module, and a driving module. The display panel also includes a temperature compensation module, wherein the timing control module is connected to the driving module and the temperature compensation module, respectively. The display panel driving method includes:

[0005] The storage module stores multiple sets of eye diagram parameters, each of which corresponds to a plurality of temperature ranges.

[0006] The temperature compensation module measures the current ambient temperature of the display panel;

[0007] The timing control module calls a set of eye diagram parameters corresponding to the current ambient temperature from the storage module according to the current ambient temperature fed back by the temperature compensation module;

[0008] The driving module drives the display panel according to the eye diagram parameters called by the timing controller.

[0009] Optionally, the temperature compensation module includes a power management integrated circuit and a temperature compensation circuit, the temperature compensation circuit includes a thermistor, and the resistance of the thermistor changes accordingly based on the current ambient temperature of the display panel;

[0010] The temperature compensation module measures the current ambient temperature of the display panel, including:

[0011] The temperature compensation circuit measures the feedback voltage across the thermistor after the resistance value is updated;

[0012] The power management integrated circuit determines a current ambient temperature corresponding to the feedback voltage.

[0013] Optionally, the timing control module calls a set of eye diagram parameters corresponding to the current ambient temperature from the storage module according to the current ambient temperature fed back by the temperature compensation module, including:

[0014] The timing control module determines the temperature range in which the current ambient temperature is located;

[0015] The timing control module calls a set of eye diagram parameters corresponding to the temperature interval in the storage module according to the temperature interval. The temperature interval is a plurality of continuously set temperature intervals, and each temperature interval corresponds to a set of eye diagram parameters.

[0016] Optionally, the display panel driving method further includes:

[0017] The timing control module generates an interactive signal according to the eye diagram parameter, and sends the interactive signal to the driving module;

[0018] The driving module increases the voltage of the target signal line interacting with the timing control module when detecting that the interaction signal between the driving module and the timing control module meets the damage condition;

[0019] When the driving module detects that the interactive signal between the driving module and the timing control module does not meet the damage condition, the driving module lowers the voltage of the target signal line interacting with the timing control module.

[0020] Optionally, the damage condition is at least one of a bit error rate of a received interactive signal being greater than a preset threshold, a lock signal being pulled low, and a number of consecutive faulty data packets being greater than a preset threshold.

[0021] Optionally, the eye diagram parameters include: a pre-emphasis gear, a de-emphasis gear, and a swing gear;

[0022] The display panel driving method further includes:

[0023] When the timing control module detects that the target signal line between the timing control module and the driving module is pulled high, the timing control module adjusts the pre-emphasis gear, the de-emphasis gear and the swing gear in a preset debugging sequence based on the eye diagram parameters corresponding to the interactive signal.

[0024] Optionally, adjusting the pre-emphasis gear, the de-emphasis gear, and the swing gear in a preset debugging sequence based on the eye diagram parameter corresponding to the interactive signal includes:

[0025] The timing control module adjusts one of the pre-emphasis parameter, the de-emphasis parameter, and the swing parameter within a parameter adjustment range.

[0026] Optionally, the display panel driving method further includes:

[0027] After the timing control module completes adjusting one of the pre-emphasis parameter, the de-emphasis parameter, and the swing parameter, detecting whether the voltage of the target signal line is increased;

[0028] When detecting that the voltage of the target signal line is pulled high, the timing control module performs combined adjustment on any two of the pre-emphasis parameter, the de-emphasis parameter and the swing parameter within the parameter adjustment range.

[0029] Optionally, the display panel driving method further includes:

[0030] After the timing control module completes the combined adjustment of any two of the pre-emphasis parameter, the de-emphasis parameter, and the swing parameter within the parameter adjustment range, the timing control module again detects whether the voltage of the signal line through which the timing control module interacts with the driving module is pulled up;

[0031] When detecting that the voltage of the target signal line is pulled high, the timing control module respectively adjusts the pre-emphasis parameter, the de-emphasis parameter and the swing parameter in combination within the parameter adjustment range.

[0032] To achieve the above object, the present invention further provides a display panel, which applies the steps of the display panel driving method described above.

[0033] In the present invention, by adding a temperature compensation module to the display panel, the current ambient temperature of the area where the display panel is located is measured, and a set of eye diagram parameters corresponding to the current ambient temperature in the storage module is directly called through the timing control module. Finally, the driving module drives the display panel according to the eye diagram parameters, thereby realizing efficient driving of the display panel under different environments. Among them, there are multiple sets of eye diagram parameters stored in the storage module, and the multiple sets of eye diagram parameters correspond one-to-one to multiple temperature intervals, which saves the time of adjusting the driving signal when driving the display panel, avoids the problem of poor display quality of the display screen of the display panel being affected by the environment in the prior art, and improves the efficiency of driving the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0035] Figure 1 Schematic diagram of a flow chart of a first embodiment of a display panel driving method according to the present invention;

[0036] Figure 2 A schematic structural diagram of a temperature compensation circuit in an embodiment of a display panel driving method of the present invention;

[0037] Figure 3 A schematic structural diagram of a display panel module according to an embodiment of a display panel driving method of the present invention;

[0038] Figure 4 Schematic diagram of a flow chart of a second embodiment of a display panel driving method according to the present invention;

[0039] Figure 5 A schematic diagram of a pre-emphasized display panel driving result according to an embodiment of the display panel driving method of the present invention;

[0040] Figure 6 A schematic diagram of a de-emphasized display panel driving result according to an embodiment of the display panel driving method of the present invention;

[0041] Figure 7 A schematic diagram of a swing-level display panel driving result according to an embodiment of a display panel driving method of the present invention;

[0042] Figure 8 FIG. 1 is a schematic structural diagram of an embodiment of a display panel according to the present invention.

[0043] Description of Figure Numbers:

[0044] Label name Label name 1 Timing control module 32 Temperature compensation circuit 2 Driver module RN1 First resistor 3 Temperature compensation module RN2 Second resistor 31 Power Management Integrated Circuits Rntc Thermistor

[0045] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0046] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0048] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0049] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0050] Example 1

[0051] Reference Figure 1 , Figure 1 FIG1 is a flow chart of a first embodiment of a display panel driving method according to the present invention. The present invention provides a first embodiment of a display panel driving method.

[0052] In this embodiment, the display panel driving method is applied to a timing control module in a display device, and the display panel driving method includes:

[0053] Step S10: The storage module stores multiple sets of eye diagram parameters, each of which corresponds to a plurality of temperature intervals.

[0054] It should be noted that the main body of execution of this embodiment is the display panel of the display device, which is typically the main controller in a liquid crystal display device, such as the data processing chip of a television controller. The display device comprises at least a display panel, a timing control and data processing chip (Timing Controller, TCON), a signal source (SOC), and a driver (Driver), and may also have other related components. The display device uses Freesync display frequency conversion technology to achieve a dynamic refresh rate. The display device is equipped with a display panel driver. By running the display panel driver, the eye diagram is compensated to improve the signal transmission quality that cannot meet the user's requirements due to environmental influences.

[0055] It is worth noting that in this embodiment, a data line for signal interaction is added between the timing control module and the driving module on the basis of the existing technology. When the voltage of the newly added data line is pulled high, it indicates that the signal transmission quality is poor, and when the voltage is pulled low, it indicates that the signal transmission quality is good, which is opposite to the logic of the existing data interaction line.

[0056] It can be understood that during the display process of the display device, the driving module will control the display panel to display according to the received signal, and monitor the transmission quality of the received signal, and feed back the signal transmission quality to the timing control module through the newly added interactive signal line or the original interactive signal line, so that the timing control module can adjust the eye diagram parameters according to actual conditions. Since the control logic of different signal lines is different, their expression forms are also different. The reason for adding an interactive signal line between the timing control module and the driving module in this embodiment is to meet the needs of subsequent adjustment of the eye diagram parameters and increase the efficiency of signal transmission.

[0057] It should be understood that the eye diagram parameters include but are not limited to: pre-emphasis level (Pre-emphasis), de-emphasis level (De-emphasis) and swing level (Swing), etc. The pre-emphasis level, de-emphasis level and swing level stored in the storage module all correspond to a certain temperature range one-to-one, so that the eye diagram parameters can be directly called according to the temperature of the area where the display panel is located to realize the driving of the display panel. For example: in the temperature range of 10℃ to 50℃, the pre-emphasis level is 3dB, the de-emphasis level is 3dB, and the swing parameter is 300mV. This embodiment does not provide specific explanations for this.

[0058] Step S20: the temperature compensation module measures the current ambient temperature of the display panel.

[0059] It is worth noting that the temperature compensation module includes: a power management integrated circuit (PMIC) and a temperature compensation circuit, and the RNTC interface of the power management integrated circuit is connected to the temperature compensation circuit to collect the feedback voltage changes of the temperature compensation circuit, thereby determining the ambient temperature changes detected by the temperature compensation circuit.

[0060] It should be noted that in this embodiment, the temperature compensation module measures the current ambient temperature of the display panel by feedback voltage from the temperature compensation circuit and calculating it through the power management integrated circuit, or it can be measured by a temperature sensing package installed on the display panel or other temperature sensors that can realize the temperature measurement function. This embodiment does not impose specific restrictions on this.

[0061] Furthermore, the temperature compensation module includes a power management integrated circuit and a temperature compensation circuit, the temperature compensation circuit includes a thermistor, and the resistance of the thermistor changes accordingly based on the current ambient temperature of the display panel;

[0062] The temperature compensation module measures the current ambient temperature of the display panel, including:

[0063] The temperature compensation circuit measures the feedback voltage across the thermistor after the resistance value is updated;

[0064] The power management integrated circuit determines a current ambient temperature corresponding to the feedback voltage.

[0065] In this embodiment, the traditional temperature sensing package or temperature sensor is relatively expensive. In order to reduce the cost, a temperature compensation circuit for measuring the ambient temperature of the display panel is constructed based on a thermistor in this embodiment, which greatly reduces the hardware cost. At the same time, the thermistor is less affected by extreme environments. The anti-interference ability of the temperature compensation circuit in this embodiment is stronger than that of traditional temperature acquisition equipment.

[0066] refer to Figure 2 The temperature compensation circuit includes a first resistor, a second resistor, a thermistor, and a constant current source. The first end of the first resistor is connected to the positive electrode of the constant current source, the second end of the first resistor is connected to the first end of the second resistor and the thermistor, respectively, and the second end of the second resistor, the second end of the thermistor, and the negative electrode of the constant current source are grounded. The thermistor in the temperature compensation circuit increases or decreases in resistance according to changes in the ambient temperature. This temperature compensation circuit can accurately provide feedback on external temperature changes and convert them into voltage feedback.

[0067] In this embodiment, the thermistor may be a positive temperature coefficient thermistor (PTC) or a negative temperature coefficient thermistor (NTC), and the relationship between the magnitude of the change in the thermistor's resistance and the change in the ambient temperature is determined by the thermistor's resistance-temperature curve. When the thermistor is a negative temperature coefficient thermistor, an increase in ambient temperature causes the thermistor's resistance to decrease, while a decrease in ambient temperature causes the thermistor's resistance to increase. When the thermistor is a positive temperature coefficient thermistor, an increase in ambient temperature causes the thermistor's resistance to increase, while a decrease in ambient temperature causes the thermistor's resistance to decrease. In this embodiment and subsequent embodiments, a negative temperature coefficient thermistor is used as an example for description.

[0068] In a specific implementation, due to the presence of a constant current source in the temperature compensation circuit, when the environment around the display panel rises, the internal lattice structure of the negative temperature coefficient thermistor changes, causing the electron movement to accelerate, resulting in a decrease in resistance. At this time, due to the presence of the constant current source, the loop current in the loop composed of the constant current source, the first resistor, the second resistor and the thermistor remains unchanged, and the resistance decreases, thereby reducing the feedback voltage Vntc. At the same time, the reduced feedback voltage will be sent to the power management integrated circuit through the interface A (RNTC) interface of the power management integrated circuit to judge the change in ambient temperature.

[0069] In a specific implementation, if there is a problem with the signal transmission quality of the display panel, it may be caused by the fact that the transmitted eye diagram parameters do not match the current ambient temperature. In this embodiment, in order to improve the signal transmission quality while taking into account the efficiency of parameter adjustment, the eye diagram parameters can be adjusted by adjusting strategies corresponding to different ambient temperatures. At this time, the feedback voltage between the power management integrated circuit and the temperature compensation circuit can be determined to facilitate the calculation of the temperature of the current environment in which the display panel is located.

[0070] It can be understood that after receiving the feedback voltage from the temperature compensation circuit, the power management integrated circuit performs temperature judgment based on the mapping relationship between the feedback voltage and the temperature, and can obtain the current ambient temperature of the environment in which the display panel is located. In order to facilitate the subsequent adjustment of the pre-emphasis gear and the swing gear, different intervals can be set for the voltage and ambient temperature, corresponding to different parameter gears. In this embodiment, the temperature can be divided into three intervals of T<10℃, 10℃≤T≤50℃ and T>50℃, corresponding to three pre-emphasis gears and swing gears, where T is the current ambient temperature.

[0071] Step S30: the timing control module calls a set of eye diagram parameters corresponding to the current ambient temperature from the storage module according to the current ambient temperature fed back by the temperature compensation module.

[0072] It can be understood that in order to improve the efficiency of display panel driving, this embodiment directly calls a set of eye diagram parameters corresponding to the current ambient high temperature in the storage module, without adjusting the eye diagram signal, to achieve the optimal eye diagram display parameters at the temperature, thereby improving driving efficiency.

[0073] It should be understood that in order to avoid being affected by the environment, there are frequent changes in eye diagram parameters caused by small temperature changes, which affect the driving effect of the display panel. At the same time, in order to reduce the amount of data processing, this embodiment can divide the ambient temperature into multiple continuously set temperature intervals and assign a set of eye diagram parameters to each temperature interval, so that when there are short-term temperature fluctuations, the eye diagram parameters of the display panel will not change frequently.

[0074] Furthermore, the timing control module calls a set of eye diagram parameters corresponding to the current ambient temperature from the storage module according to the current ambient temperature fed back by the temperature compensation module, including:

[0075] The timing control module determines the temperature range in which the current ambient temperature is located;

[0076] The timing control module calls a set of eye diagram parameters corresponding to the temperature interval in the storage module according to the temperature interval. The temperature interval is a plurality of continuously set temperature intervals, and each temperature interval corresponds to a set of eye diagram parameters.

[0077] refer to Figure 3 After the power management integrated circuit determines the current ambient temperature information, it sends the current ambient temperature information to the timing control module through the serial communication bus via interface B (SDA) and interface C (SCL). The timing control module searches for the corresponding pre-emphasis gear, de-emphasis gear, and swing gear according to the received current ambient temperature information, adaptively adjusts the eye diagram signal, reduces the signal attenuation caused by ambient temperature changes, and improves the quality of signal transmission.

[0078] When adjusting the pre-emphasis level, de-emphasis level, and swing level, refer to the corresponding relationships in Table 1. The temperature ranges are proportional to the pre-emphasis level, de-emphasis level, and swing level settings, respectively. There are no specific restrictions on the settings of the pre-emphasis level and swing level corresponding to different temperature ranges.

[0079] Table 1

[0080] temperature Pre-emphasis gear De-emphasis gear Swing gear Low temperature (-20℃~10℃) 1db 1db 100mv Normal temperature (10℃~50℃) 3db 3db 300mv High temperature (50℃~90℃) 5db 5db 500mv

[0081] In addition, the timing control module in this embodiment can also directly receive the voltage feedback from the temperature compensation circuit, and query the pre-emphasis gear and swing gear corresponding to the feedback voltage of the temperature compensation circuit to facilitate the driving of the display panel, reduce the temperature calculation process, and improve the efficiency of signal transmission.

[0082] In a specific implementation, referring to Table 2, the voltage can be divided into three gears corresponding to the temperature ranges mentioned above, and different voltages or temperature ranges correspond to eye diagram parameters such as a pre-emphasis gear and a swing gear. The specific settings of the pre-emphasis gear and the swing gear will be affected by the temperature characteristics of the thermistor, the output current of the constant current source of the temperature compensation circuit, and other electronic devices. Therefore, in this embodiment, there is no specific limitation on the specific parameter settings of the pre-emphasis gear and the swing gear.

[0083] Table 2

[0084]

[0085] Step S40: the driving module drives the display panel according to the eye diagram parameters called by the timing controller.

[0086] In this embodiment, by adding a temperature compensation module to the display panel, the current ambient temperature of the area where the display panel is located is measured, and a set of eye diagram parameters corresponding to the current ambient temperature in the storage module is directly called through the timing control module. Finally, the driving module drives the display panel according to the eye diagram parameters, thereby achieving efficient driving of the display panel under different environments. Among them, there are multiple sets of eye diagram parameters stored in the storage module, and the multiple sets of eye diagram parameters correspond one-to-one to multiple temperature intervals, which saves the time of adjusting the driving signal when driving the display panel, avoids the problem of the display screen of the display panel being affected by the environment and the poor display quality in the prior art, and improves the efficiency of driving the display panel.

[0087] Example 2

[0088] Reference Figure 4 , Figure 4 FIG2 is a flow chart of a second embodiment of a display panel driving method according to the present invention. Based on the first embodiment described above, the present invention proposes a second embodiment of a display panel driving method.

[0089] In this embodiment, after step S30, the method further includes:

[0090] Step S310: the timing control module generates an interactive signal according to the eye diagram parameters, and sends the interactive signal to the driving module.

[0091] It is understandable that the interactive signal may be a data interactive signal received from a newly added interactive signal line, or may be a data interactive signal received from an existing Lock line, and this embodiment does not impose any specific limitation on this.

[0092] Step S320 : When the driving module detects that the interactive signal between the driving module and the timing control module meets the damage condition, the driving module increases the voltage of the target signal line interacting with the timing control module.

[0093] It should be understood that the damage condition includes but is not limited to at least one of the following: a received interactive signal bit error rate greater than a preset threshold, a lock signal being pulled low, and the number of consecutive faulty data packets being greater than a preset threshold. The original signal line operates normally when the voltage is pulled high, and is in an abnormal state when the voltage is pulled low. Therefore, in addition to judging the signal transmission quality by the voltage state of the newly added interactive signal line as proposed in this embodiment, it is also possible to judge whether the signal is damaged during transmission by the voltage state of the original lock signal line.

[0094] It is worth noting that if the signal transmission process between the timing control module and the driving module has a large loss, the driving module will actively increase the voltage of the signal line interacting with the timing control module, for example: 3.3V, to notify the timing control module to adjust the eye diagram parameters according to the preset debugging sequence, modify the eye diagram parameters in real time, and reduce the loss of signal transmission.

[0095] Among them, the eye diagram parameters include but are not limited to: pre-emphasis gear, de-emphasis gear and swing gear, etc., and can also be rate, spread spectrum status, etc. In order to achieve efficient display panel driving when the signal transmission quality is poor, this embodiment limits the debugging order of the above parameters.

[0096] Furthermore, when the timing control module detects that the target signal line between the timing control module and the driving module is pulled high, the timing control module adjusts the pre-emphasis gear, the de-emphasis gear and the swing gear in a preset debugging sequence based on the eye diagram parameters corresponding to the interactive signal.

[0097] It can be understood that the preset debugging sequence of this embodiment can correspond to the current ambient temperature of the display panel, and the preset debugging sequence corresponding to each temperature range can be different, which can ensure that the pre-emphasis gear, de-emphasis gear and swing gear can be fine-tuned on the eye diagram parameters corresponding to the temperature through the preset debugging sequence, so as to achieve better signal transmission quality. In this embodiment, for example: the order of single eye diagram parameter adjustment, two eye diagram parameter combination adjustment and three eye diagram parameter combination adjustment, this embodiment does not impose specific restrictions on this.

[0098] Furthermore, the adjusting the pre-emphasis gear, the de-emphasis gear, and the swing gear in a preset debugging sequence based on the eye diagram parameters corresponding to the interactive signal includes:

[0099] The timing control module adjusts one of the pre-emphasis parameter, the de-emphasis parameter, and the swing parameter within a parameter adjustment range.

[0100] It should be noted that, when performing parameter adjustment on any one of the pre-emphasis gear, the de-emphasis gear and the swing gear within its parameter adjustment range, it is possible to perform parameter adjustment on one of the three parameters within its parameter range. If the voltage of the signal line interacting with the driving module is pulled up, one of the remaining two parameters is selected again for adjustment. At this time, the other two parameters will be restored to the initial parameters.

[0101] For example, referring to Table 3, when adjusting the parameters within the corresponding parameter adjustment ranges according to the order of pre-emphasis, de-emphasis, and swing gear, the pre-emphasis gear is first adjusted, and the adjustment order of the parameter adjustment range is first large and then small, that is, the pre-emphasis gear is first increased from 3dB to 4dB. At this time, after a preset interval of 100ms, the voltage of the interactive signal line is detected again. If the voltage of the signal line is high, it is increased from 4dB to 5dB. If the voltage of the signal line is high, it is reduced to 2dB or 1dB. If the voltage of the signal line between the timing control module and the driver module is still high after the pre-emphasis gear is adjusted within its parameter adjustment range, the pre-emphasis gear is restored to 3dB, and the de-emphasis gear is adjusted. The parameters of the de-emphasis gear are still adjusted in the above order, from large to small within the parameter adjustment range. If the voltage of the signal line is still high, the swing gear is adjusted in the same order.

[0102] Table 3

[0103] Pre-emphasis De-emphasis Swing gear 3db 3db 300mv 4db 3db 300mv 2db 3db 300mv 3db 4db 300mv 3db 2db 300mv 3db 3db 400mv 3db 3db 200mv

[0104] In the specific implementation, refer to Figure 5 , Figure 5 This is a diagram showing the trend of eye diagram signals changing when using pre-emphasis compensation. Figure 6 , Figure 6 This is a diagram showing the trend of eye diagram signals changing when de-emphasis compensation is used; see Figure 7 , Figure 7 This is a schematic diagram of the changing trend of the eye diagram signal when using pre-emphasis gear compensation. When using pre-emphasis, de-emphasis and swing gear compensation eye diagrams, parameter compensation is performed on the rising and falling edges of the eye diagram signal to achieve the correct compensation effect. If the compensation time or delay deviation exceeds a certain range, the display panel driving effect will be poor.

[0105] Furthermore, in order to standardize the order of parameter adjustment, when adjusting the parameters of any one of the pre-emphasis gear, the de-emphasis gear and the swing gear within its parameter adjustment range, this embodiment can adjust the pre-emphasis gear, the de-emphasis gear and the swing gear in sequence.

[0106] In addition, this embodiment does not limit the adjustment order of the pre-emphasis gear, the swing gear and the de-emphasis gear. For example, the parameters can be adjusted in the order of the pre-emphasis gear, the de-emphasis gear and the swing gear; or in the order of the pre-emphasis gear, the swing gear and the de-emphasis gear; or in the order of the de-emphasis gear, the pre-emphasis gear and the swing gear, or in the order of the de-emphasis gear, the swing gear and the pre-emphasis gear; or in the order of the swing gear, the de-emphasis gear and the pre-emphasis gear, or in the order of the swing gear, the pre-emphasis gear and the de-emphasis gear. In short, you can choose any one of them for adjustment and then choose one of the remaining two to adjust.

[0107] Furthermore, if the voltage of the signal line interacting with the driving module is still high after the above adjustment is completed, it means that two or three parameter adjustments may be required to compensate for the eye diagram error, that is, after the timing control module completes the adjustment of one of the pre-emphasis parameter, the de-emphasis parameter, and the swing parameter, it detects whether the voltage of the target signal line is high;

[0108] When detecting that the voltage of the target signal line is pulled high, the timing control module performs combined adjustment on any two of the pre-emphasis parameter, the de-emphasis parameter and the swing parameter within the parameter adjustment range.

[0109] In a specific implementation, if there are two eye diagram parameter adjustments, any two of them can be selected for adjustment, and the remaining parameter remains unchanged. For example, when the pre-emphasis gear and the de-emphasis gear are selected for adjustment, the swing gear remains unchanged. The parameter adjustment direction can be the order of increasing the pre-emphasis gear and the de-emphasis gear at the same time, increasing the pre-emphasis gear and decreasing the de-emphasis gear, decreasing the pre-emphasis gear and increasing the de-emphasis gear, and decreasing them at the same time. This embodiment does not impose specific restrictions on this.

[0110] Furthermore, if the voltage of the signal line interacting with the driver module is still increased after the above adjustment is completed, it indicates that three parameter adjustments are required to compensate for the eye diagram error, that is, after the timing control module performs a combined adjustment on any two of the pre-emphasis parameter, the de-emphasis parameter, and the swing parameter within their parameter adjustment ranges, the timing control module again detects whether the voltage of the signal line interacting with the driver module is increased;

[0111] When detecting that the voltage of the target signal line is pulled high, the timing control module respectively adjusts the pre-emphasis parameter, the de-emphasis parameter and the swing parameter in combination within the parameter adjustment range.

[0112] In a specific implementation, when the parameters of the pre-emphasis gear, the de-emphasis gear, and the swing gear need to be adjusted, the parameter values can still be adjusted in a descending direction, for example: increasing the values of the pre-emphasis gear, the de-emphasis gear, and the swing gear at the same time, increasing the values of the pre-emphasis gear and the de-emphasis gear and reducing the swing gear, increasing the values of the pre-emphasis gear and the swing gear and reducing the value of the de-emphasis gear, increasing the values of the pre-emphasis gear and the swing gear and reducing the value of the de-emphasis gear, increasing the values of the pre-emphasis gear and the swing gear and reducing the value of the de-emphasis gear, increasing the values of the de-emphasis gear and the swing gear and reducing the value of the de-emphasis gear, increasing the values of the de-emphasis gear and the swing gear and reducing the value of the pre-emphasis gear, and reducing the values of the three parameters at the same time, etc. This embodiment does not impose specific restrictions on this.

[0113] It is understandable that if the voltage of the signal line interacting with the driving module is still high after the above adjustment is completed, it means that there is a fault in the signal line or the display device and maintenance is required, and an early warning signal can be sent to the user.

[0114] Step S330 : When the driving module detects that the interactive signal between the driving module and the timing control module does not meet the damage condition, the driving module lowers the voltage of the target signal line interacting with the timing control module.

[0115] It can be understood that if, after adjusting the display panel drive signal, the timing control module satisfies the conditions that the bit error rate of the received interactive signal is less than or equal to the preset threshold, the lock signal is pulled high, and the number of consecutive fault data packets is less than or equal to the preset threshold, it means that the signal loss is small, and the voltage of the signal line interacting with the timing control module is actively lowered. At this time, regardless of whether the eye diagram parameters are adjusted, they will be saved in the non-volatile memory of the timing control module according to the current eye diagram parameters. The next time the eye diagram signal is sent, the corresponding eye diagram signal will be generated based on the eye diagram parameters stored in the non-volatile memory.

[0116] Furthermore, before adjusting the eye diagram parameters according to the eye diagram display panel driving strategy corresponding to the current ambient temperature, the method further includes:

[0117] Initialize each eye diagram parameter to obtain the initial eye diagram signal;

[0118] The initial eye diagram signal is sent to the driving module, and the voltage state of the signal line interacting with the driving module is detected.

[0119] It can be understood that the initialization of each eye diagram parameter can be the signal parameter stored locally in the timing control module, or the eye diagram parameter corresponding to the last time the eye diagram signal was sent. In this embodiment and the following embodiments, the pre-emphasis gear is 3dB, the de-emphasis gear is 3dB, and the swing gear is 300mV as examples of the initial eye diagram parameters.

[0120] In a specific implementation, the allowable operating ranges corresponding to the pre-emphasis gear (Pre-emphasis), de-emphasis gear (De-emphasis) and swing gear can be referred to Table 4.

[0121] Table 4

[0122] Pre-emphasis De-emphasis Swing gear 5db 5db 500mv 4db 4db 400mv 3db 3db 300mv 2db 2db 300mv 1db 1db 100mv

[0123] In a specific implementation, when the voltage of the signal line through which the timing control module interacts with the driver module is pulled up, the eye diagram parameters can be adjusted according to the preset debugging sequence, and the pre-emphasis gear and the swing gear can be adjusted in combination with the feedback voltage of the temperature compensation circuit. If there is a conflict between the two parameter adjustments, the eye diagram parameters when the voltage of the signal line through which the timing control module interacts with the driver module is pulled down can be detected as the optimal parameter output.

[0124] In this embodiment, the eye diagram parameters of the display panel in each temperature range are first determined so that the eye diagram parameters match the current ambient temperature, thereby achieving coarse adjustment of the transmission quality of the eye diagram parameters. Moreover, before the display panel receives the driving signal, by detecting whether the interaction signal between the driving module and the timing control module meets the damage condition, it is determined whether it is necessary to fine-tune the pre-emphasis gear, de-emphasis gear, and swing gear based on a preset debugging sequence, thereby further improving the signal transmission quality and picture display quality of the display panel and improving the robustness of the picture display of the display panel under different ambient temperatures.

[0125] Example 3

[0126] In this embodiment, this embodiment is a further optimization and improvement based on the first embodiment. In this embodiment, the process proceeds to step S40, at which point the driving module drives the display panel according to the eye diagram parameters, thereby achieving efficient driving of the display panel under different environments. Since the storage module stores parameters corresponding to multiple temperature intervals, the eye diagram parameters can be quickly obtained to quickly drive the display panel based on the feedback from the temperature compensation module. However, the reorganized eye diagram parameters are only a set of eye diagram parameters corresponding to the temperature interval in which they are located, and may not be the best set of eye diagram parameters corresponding to the real-time temperature. In other words, when the process proceeds to step S40, although the compensation method of this embodiment can quickly and relatively accurately achieve compensation and improve the display effect of the display panel, this accuracy can be further improved.

[0127] In this embodiment, in order to further improve the compensation accuracy, after step S40, the following steps may be further performed:

[0128] Step S410: the driving module detects the transmission quality of the driving signal between the driving module and the timing control module;

[0129] It can be understood that, since in this embodiment, there are two data lines for signal interaction between the timing control module and the driving module, wherein, when the voltage of the newly added data line is pulled high, it indicates that the signal transmission quality is poor. When the signal transmission quality is poor, the driving module can raise the voltage of the target signal line that interacts with the timing control module when it detects that the interaction signal between the timing control module meets the damage condition; when the voltage is pulled low, it indicates that the signal transmission quality is good. When the signal transmission quality is good, it means that the eye diagram parameters directly called from the storage module are the best compensation parameters; the existing drive signal interaction line is mainly used to transmit the drive signal, which is used to drive the display panel to display the picture, and when the voltage of the drive signal interaction line is pulled high, it indicates that the signal transmission quality is good, and when the voltage is pulled low, it indicates that the signal transmission quality is poor, which is completely opposite to the control logic of the newly added data line.

[0130] In this embodiment, when the timing control module detects that the target signal line between the timing control module and the driving module is pulled high, the timing control module adjusts the pre-emphasis gear, the de-emphasis gear and the swing gear in a preset debugging sequence based on the eye diagram parameters corresponding to the interactive signal.

[0131] In a specific implementation, when the driving module detects that the voltage of the driving signal interaction line between the driving module and the timing control module is pulled down, it indicates that the transmission quality of the driving signal is poor. The above embodiment 2 can be used to adjust the pre-emphasis gear, the de-emphasis gear and the swing gear through the preset debugging sequence to adjust the eye diagram parameters and realize the adjustment of the driving signal and the display effect of the display panel.

[0132] Step S420 : When the transmission quality of the driving signal is poor, the timing control module adjusts the pre-emphasis gear, the de-emphasis gear, and the swing gear according to a preset debugging sequence.

[0133] It should be noted that when adjusting the pre-emphasis gear, de-emphasis gear and swing gear through the preset debugging sequence, the adjustment can be carried out in the order of single eye diagram parameter adjustment, two eye diagram parameter combination adjustment and three eye diagram parameter combination adjustment. Among them, when adjusting a single eye diagram parameter, one of the three parameters can be adjusted within its parameter range. If the voltage of the drive signal interaction line between the drive module is pulled up, one of the remaining two parameters is selected again for adjustment. At this time, the other two parameters will be restored to the initial parameters.

[0134] For example, referring to Table 3, when adjusting the parameters within the corresponding parameter adjustment ranges according to the order of pre-emphasis, de-emphasis, and swing gear, the pre-emphasis gear is first adjusted, and the adjustment order of the parameter adjustment range is first large and then small, that is, the pre-emphasis gear is first increased from 3dB to 4dB. At this time, after a preset interval of 100ms, the voltage of the interactive signal line is detected again. If the voltage of the signal line is high, it is increased from 4dB to 5dB. If the voltage of the signal line is high, it is reduced to 2dB or 1dB. If the voltage of the signal line between the timing control module and the driver module is still high after the pre-emphasis gear is adjusted within its parameter adjustment range, the pre-emphasis gear is restored to 3dB, and the de-emphasis gear is adjusted. The parameters of the de-emphasis gear are still adjusted in the above order, from large to small within the parameter adjustment range. If the voltage of the signal line is still high, the swing gear is adjusted in the same order.

[0135] Table 3

[0136] Pre-emphasis De-emphasis Swing gear 3db 3db 300mv 4db 3db 300mv 2db 3db 300mv 3db 4db 300mv 3db 2db 300mv 3db 3db 400mv 3db 3db 200mv

[0137] This embodiment does not limit the adjustment order of the pre-emphasis gear, the swing gear and the de-emphasis gear. For example, the parameters can be adjusted in the order of the pre-emphasis gear, the de-emphasis gear and the swing gear; or in the order of the pre-emphasis gear, the swing gear and the de-emphasis gear; or in the order of the de-emphasis gear, the pre-emphasis gear and the swing gear, or in the order of the de-emphasis gear, the swing gear and the pre-emphasis gear; or in the order of the swing gear, the de-emphasis gear and the pre-emphasis gear, or in the order of the swing gear, the pre-emphasis gear and the de-emphasis gear. In short, you can choose any one of them for adjustment and then choose one of the remaining two to adjust.

[0138] Furthermore, if the voltage of the signal line interacting with the driving module is still high after the above adjustment is completed, it means that two or three parameter adjustments may be required to compensate for the eye diagram error, that is, after the timing control module completes the adjustment of one of the pre-emphasis parameter, the de-emphasis parameter, and the swing parameter, it detects whether the voltage of the target signal line is high;

[0139] When detecting that the voltage of the target signal line is pulled high, the timing control module performs combined adjustment on any two of the pre-emphasis parameter, the de-emphasis parameter and the swing parameter within the parameter adjustment range.

[0140] In a specific implementation, if there are two eye diagram parameter adjustments, any two of them can be selected for adjustment, and the remaining parameter remains unchanged. For example, when the pre-emphasis gear and the de-emphasis gear are selected for adjustment, the swing gear remains unchanged. The parameter adjustment direction can be the order of increasing the pre-emphasis gear and the de-emphasis gear at the same time, increasing the pre-emphasis gear and decreasing the de-emphasis gear, decreasing the pre-emphasis gear and increasing the de-emphasis gear, and decreasing them at the same time. This embodiment does not impose specific restrictions on this.

[0141] Furthermore, if the voltage of the signal line interacting with the driver module is still increased after the above adjustment is completed, it indicates that three parameter adjustments are required to compensate for the eye diagram error, that is, after the timing control module performs a combined adjustment on any two of the pre-emphasis parameter, the de-emphasis parameter, and the swing parameter within their parameter adjustment ranges, the timing control module again detects whether the voltage of the signal line interacting with the driver module is increased;

[0142] When detecting that the voltage of the target signal line is pulled high, the timing control module respectively adjusts the pre-emphasis parameter, the de-emphasis parameter and the swing parameter in combination within the parameter adjustment range.

[0143] In a specific implementation, when the parameters of the pre-emphasis gear, the de-emphasis gear, and the swing gear need to be adjusted, the parameter values can still be adjusted in a descending direction, for example: increasing the values of the pre-emphasis gear, the de-emphasis gear, and the swing gear at the same time, increasing the values of the pre-emphasis gear and the de-emphasis gear and reducing the swing gear, increasing the values of the pre-emphasis gear and the swing gear and reducing the value of the de-emphasis gear, increasing the values of the pre-emphasis gear and the swing gear and reducing the value of the de-emphasis gear, increasing the values of the pre-emphasis gear and the swing gear and reducing the value of the de-emphasis gear, increasing the values of the de-emphasis gear and the swing gear and reducing the value of the de-emphasis gear, increasing the values of the de-emphasis gear and the swing gear and reducing the value of the pre-emphasis gear, and reducing the values of the three parameters at the same time, etc. This embodiment does not impose specific restrictions on this.

[0144] It is understandable that if the voltage of the signal line interacting with the driving module is still high after the above adjustment is completed, it means that there is a fault in the signal line or the display device and maintenance is required, and an early warning signal can be sent to the user.

[0145] In this embodiment, the eye diagram parameters of the display panel in each temperature range are first determined so that the eye diagram parameters match the current ambient temperature, thereby achieving coarse adjustment of the eye diagram parameter transmission quality. After the display panel receives the driving signal, by detecting the voltage of the driving signal interaction line where the driving signal is located, it is determined whether it is necessary to fine-tune the pre-emphasis gear, de-emphasis gear, and swing gear based on a preset debugging sequence, thereby further improving the signal transmission quality and picture display quality of the display panel and improving the robustness of the picture display of the display panel under different ambient temperatures.

[0146] Reference Figure 8 , Figure 8 Schematic diagram of the structure of one embodiment of a display panel according to the present invention. To achieve the above-mentioned objectives, the present invention further provides a display panel 100, comprising a timing control module 1001, a driver module 1002, a storage module 1003, and a temperature compensation module 1004. Since the display panel 100 can adopt the technical solutions of all the above-mentioned embodiments, it at least has the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described in detail here.

[0147] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A display panel driving method, wherein the display panel driving method is applied to a display panel, wherein the display panel comprises a timing control module, a storage module and a driving module, wherein: The display panel further includes a temperature compensation module, and the timing control module is connected to the driving module and the temperature compensation module respectively; The display panel driving method includes: The storage module stores multiple sets of eye diagram parameters, each of which corresponds to a plurality of temperature ranges. The temperature compensation module measures the current ambient temperature of the display panel; The timing control module calls a set of eye diagram parameters corresponding to the current ambient temperature from the storage module according to the current ambient temperature fed back by the temperature compensation module; The driving module drives the display panel according to the eye diagram parameters called by the timing controller; The display panel driving method further includes: The timing control module generates an interactive signal according to the eye diagram parameter, and sends the interactive signal to the driving module; The driving module increases the voltage of the target signal line interacting with the timing control module when detecting that the interaction signal between the driving module and the timing control module meets the damage condition; When the driving module detects that the interaction signal between the driving module and the timing control module does not meet the damage condition, the driving module lowers the voltage of the target signal line interacting with the timing control module; The eye diagram parameters include: pre-emphasis gear, de-emphasis gear and swing gear; When the timing control module detects that the target signal line between the timing control module and the driving module is pulled high, the timing control module adjusts the pre-emphasis gear, the de-emphasis gear and the swing gear in a preset debugging sequence based on the eye diagram parameters corresponding to the interactive signal.

2. The display panel driving method according to claim 1, wherein: The temperature compensation module includes a power management integrated circuit and a temperature compensation circuit, the temperature compensation circuit includes a thermistor, and the resistance of the thermistor changes accordingly based on the current ambient temperature of the display panel; The temperature compensation module measures the current ambient temperature of the display panel, including: The temperature compensation circuit measures the feedback voltage across the thermistor after the resistance value is updated; The power management integrated circuit determines a current ambient temperature corresponding to the feedback voltage.

3. The display panel driving method according to claim 1, wherein: The timing control module calls a set of eye diagram parameters corresponding to the current ambient temperature from the storage module according to the current ambient temperature fed back by the temperature compensation module, including: The timing control module determines the temperature range in which the current ambient temperature is located; The timing control module calls a set of eye diagram parameters corresponding to the temperature interval in the storage module according to the temperature interval. The temperature interval is a plurality of continuously set temperature intervals, and each temperature interval corresponds to a set of eye diagram parameters.

4. The display panel driving method according to claim 1, wherein: The damage condition is at least one of the following: a bit error rate of a received interactive signal is greater than a preset threshold, a lock signal is pulled low, and the number of consecutive faulty data packets is greater than a preset threshold.

5. The display panel driving method according to claim 1, wherein: The adjusting the pre-emphasis gear, the de-emphasis gear, and the swing gear in a preset debugging sequence based on the eye diagram parameters corresponding to the interactive signal includes: The timing control module performs parameter adjustment on one of the pre-emphasis gear, the de-emphasis gear, and the swing gear within a parameter adjustment range.

6. The display panel driving method according to claim 5, wherein: The display panel driving method further includes: After the timing control module completes adjusting one of the pre-emphasis gear, the de-emphasis gear, and the swing gear, detecting whether the voltage of the target signal line is increased; When detecting that the voltage of the target signal line is pulled high, the timing control module performs a combined adjustment on any two of the pre-emphasis gear, the de-emphasis gear, and the swing gear within the parameter adjustment range.

7. The display panel driving method according to claim 6, wherein: The display panel driving method further includes: After the timing control module completes the combined adjustment of any two of the pre-emphasis gear, the de-emphasis gear, and the swing gear within the parameter adjustment range, the timing control module again detects whether the voltage of the signal line through which the timing control module interacts with the driving module is pulled up; When the timing control module detects that the voltage of the target signal line is pulled up, the timing control module respectively adjusts the pre-emphasis gear, the de-emphasis gear and the swing gear in combination within the parameter adjustment range.

8. A display panel, characterized in that: The display panel is applied with the steps of the display panel driving method according to any one of claims 1 to 7.

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