Driving circuit, driving method and display device of display panel

Abstract

The application provides a driving circuit, a driving method and a display device of a display panel, wherein the driving circuit of the display panel comprises a temperature compensation circuit, a low-power driving circuit, a power supply protection circuit and a master control circuit; the master control circuit acquires an ambient temperature, a working current and display content, and correspondingly generates a set of cooperative control parameters, and outputs the set of cooperative control parameters to the temperature compensation circuit, the low-power driving circuit and the power supply protection circuit respectively, and correspondingly adjusts a temperature compensation reference voltage of the temperature compensation circuit, a working mode and an overcurrent protection threshold value, so that synchronous optimization of the compensation voltage, the driving mode and the protection threshold value is realized, a closed-loop cooperative system is formed, there is no information island, and the performance, power consumption and reliability under a wide temperature range and a variable load scene are improved.

Description

Technical Field

[0001] This invention belongs to the field of display panel technology, and particularly relates to a driving circuit, driving method and display device for a display panel. Background Technology

[0002] In the field of liquid crystal display (LCD) system technology, particularly in display devices used in wide-temperature environments such as automotive dashboards, outdoor advertising screens, and industrial control terminals, the system needs to maintain stable display performance within a temperature range of -40℃ to +85℃. These application scenarios place multiple technical requirements on the display system: ensuring the response speed and display brightness of the liquid crystal in low-temperature environments, controlling power consumption and preventing device overheating in high-temperature environments, and maintaining system reliability and safety throughout the entire temperature range. Traditional LCD systems employ discrete technical modules to handle temperature compensation, power consumption optimization, and circuit protection separately. Each module operates independently based on its own sensors and controllers, forming three parallel technical paths.

[0003] However, the discrete design approach commonly used in existing technologies has significant performance drawbacks. The temperature compensation module, implemented using analog circuitry and adjusting the drive voltage via a thermistor network, has a fixed compensation curve and cannot dynamically optimize based on other system states. The low-power drive module employs a fixed architecture, reducing power consumption during static display but failing to predict and adapt to dynamic load changes. The power protection module sets fixed thresholds, which may misinterpret a normal increase in operating current caused by temperature compensation as an overcurrent fault, triggering protection. The independent parameter settings for each module, lacking information sharing and coordination mechanisms, prevent the system from simultaneously meeting the multiple requirements of display performance stability, system power economy, and operational reliability under wide-temperature-range variable load scenarios. The limitations of this technical architecture stem from information isolation between modules and static parameter fixation; each module makes decisions based only on local information, failing to achieve global optimization. Summary of the Invention

[0004] The purpose of this invention is to provide a driving circuit for a display panel, which aims to solve the problem of low stability and reliability caused by information isolation in the traditional driving architecture of display panels.

[0005] A first aspect of this invention provides a driving circuit for a display panel, comprising:

[0006] A temperature compensation circuit, connected to the display panel, is used to adjust the driving voltage applied to the display panel in real time according to changes in ambient temperature.

[0007] A low-power driving circuit, connected to the display panel, is used to switch to a low-power mode or a high-performance mode according to a mode switching signal, and to provide a driving signal for the corresponding mode to the display panel.

[0008] A power protection circuit, connected to the power module, is used to monitor the operating current of the drive circuit of the display panel in real time. When the operating current exceeds a preset current threshold, a corresponding current protection action is performed.

[0009] The main control circuit is connected to the temperature compensation circuit, the low-power drive circuit, and the power protection circuit, respectively. The main control circuit is used for:

[0010] The ambient temperature, the operating current, and the display content of the display panel are collected.

[0011] Based on the collected ambient temperature, operating current, and display content, the current operating mode of the display panel is determined;

[0012] Based on the determined current operating mode, a set of cooperative control parameters is generated, which includes a temperature compensation reference voltage for the temperature compensation circuit, a mode switching signal for the low-power drive circuit, and a current threshold for the power protection circuit.

[0013] The parameters in the coordinated control parameter set are synchronously sent to the corresponding temperature compensation circuit, low-power drive circuit and power protection circuit, so that each circuit works in coordination based on the coordinated control parameter set.

[0014] Optionally, the temperature compensation circuit includes:

[0015] A temperature tracking circuit is used to generate a first adjustment voltage in response to an instantaneous change in the ambient temperature;

[0016] The driving voltage generation circuit is connected to the temperature tracking circuit and the main control circuit respectively. It is used to receive the temperature compensation reference voltage sent by the main control circuit as the second adjustment voltage, and adjust the driving voltage applied to the display panel according to the synthesis result of the first adjustment voltage and the second adjustment voltage.

[0017] Optionally, the temperature tracking circuit includes:

[0018] Voltage divider network;

[0019] A thermistor is connected in series with the voltage divider network. The thermistor is used to generate a corresponding voltage signal according to the ambient temperature. The voltage divider network is used to divide the voltage signal and output the first adjustment voltage.

[0020] The digital reference injection circuit includes a first isolation resistor and a second isolation resistor. The first isolation resistor is connected in series between the reference node of the voltage divider network and the driving voltage generation circuit, and the second isolation resistor is connected between the output terminal of the main control circuit and the driving voltage generation circuit.

[0021] Optionally, the low-power driving circuit includes:

[0022] An error amplifier is provided, wherein the first input terminal of the error amplifier is used to input the grayscale voltage output by the main control circuit, and the second input terminal of the error amplifier is connected to the data line of the display panel. The error amplifier is used to compare the grayscale voltage with the driving voltage of the display panel to generate an error amplification signal.

[0023] A power transistor, connected to the output of the error amplifier, is used to generate a drive voltage based on the error amplification signal.

[0024] A current-limiting resistor is connected between the output terminal of the power transistor and the data line of the display panel.

[0025] A mode switching switch is connected in parallel across the current limiting resistor. The mode switching switch is used to trigger on / off switching according to the mode switching signal to switch to low power mode or high performance mode.

[0026] Optionally, the power protection circuit includes a programmable protection chip, which is connected between the power module and the load. The programmable interface of the programmable protection chip is connected to the main control circuit and receives the current threshold.

[0027] The programmable protection chip is used to monitor the operating current based on the current threshold issued by the main control circuit, and when the operating current exceeds the current threshold, it cuts off the power supply circuit between the power module and the load.

[0028] Optionally, the main control circuit is further used for:

[0029] After the instruction is issued, the operating current is continuously monitored;

[0030] If the operating current is less than the adjusted current threshold, the current set of cooperative control parameters is maintained.

[0031] If the operating current exceeds the adjusted current threshold, at least one of the parameters of the temperature compensation reference voltage, the mode switching signal, and the current threshold is adjusted until the operating current is less than the adjusted current threshold.

[0032] Optionally, the main control circuit includes:

[0033] Temperature sensing circuit, used to detect ambient temperature and generate temperature detection signal;

[0034] A current monitoring circuit, connected to the power supply module, is used to detect the operating current and generate a current detection signal;

[0035] The controller is connected to the temperature sensing circuit, the current monitoring circuit, the temperature compensation circuit, the low-power driving circuit, and the power protection circuit, respectively. The controller is used to perform data analysis on the display content and generate a load status signal, and to generate a set of collaborative control parameters based on the temperature detection signal, the current detection signal, and the load status signal, so that each circuit can work collaboratively based on the set of collaborative control parameters.

[0036] A second aspect of the present invention provides a display device, including a display panel and a driving circuit for the display panel as described above, wherein the driving circuit for the display panel is connected to the display panel.

[0037] A third aspect of this invention provides a driving method for a display panel, applicable to the driving circuit of the display panel as described above, the driving method for the display panel comprising:

[0038] Collect ambient temperature, operating current of the display panel, and display content of the display panel;

[0039] Based on the collected ambient temperature, operating current, and display content, the current operating mode of the display panel is determined;

[0040] Based on the determined current operating mode, a set of cooperative control parameters is generated, which includes a temperature compensation reference voltage for the temperature compensation circuit, a mode switching signal for the low-power drive circuit, and a current threshold for the power protection circuit.

[0041] The parameters in the coordinated control parameter set are synchronously sent to the corresponding temperature compensation circuit, low-power drive circuit and power protection circuit, so that each circuit works in coordination based on the coordinated control parameter set.

[0042] Optionally, the step of synchronously sending each parameter in the coordinated control parameter set to the corresponding temperature compensation circuit, low-power drive circuit, and power protection circuit, so that each circuit works collaboratively based on the coordinated control parameter set, further includes:

[0043] After the instruction is issued, the operating current is continuously monitored;

[0044] If the operating current is less than the adjusted current threshold, the current set of cooperative control parameters is maintained.

[0045] If the operating current exceeds the adjusted current threshold, at least one of the parameters of the temperature compensation reference voltage, the mode switching signal, and the current threshold is adjusted until the operating current is less than the adjusted current threshold.

[0046] The beneficial effects of the present invention embodiments compared with the prior art are as follows: The driving circuit of the above-mentioned display panel includes a temperature compensation circuit, a low-power driving circuit, a power protection circuit and a main control circuit. The main control circuit acquires the ambient temperature, operating current and display content, and generates a set of collaborative control parameters accordingly. The set of collaborative control parameters is output to the temperature compensation circuit, the low-power driving circuit and the power protection circuit respectively, and the temperature compensation reference voltage, operating mode and overcurrent protection threshold of the temperature compensation circuit are adjusted accordingly. The synchronous optimization of compensation voltage, driving mode and protection threshold is realized, forming a closed-loop collaborative system without information islands, and improving the performance, power consumption and reliability under wide temperature range and variable load scenarios. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the driving circuit for the display panel provided in Embodiment 1 of the present invention;

[0048] Figure 2 A schematic diagram of the functional modules of the driving circuit for the display panel provided in Embodiment 1 of the present invention;

[0049] Figure 3 This is a schematic diagram of the driving circuit for the display panel provided in Embodiment 2 of the present invention;

[0050] Figure 4 This is a circuit diagram of the temperature compensation circuit provided in Embodiment 2 of the present invention;

[0051] Figure 5 This is a schematic diagram of the first type of low-power driving circuit provided in Embodiment 2 of the present invention;

[0052] Figure 6 This is a second circuit diagram of the low-power driving circuit provided in Embodiment 2 of the present invention;

[0053] Figure 7 This is a circuit diagram of the programmable protection chip provided in Embodiment 2 of the present invention;

[0054] Figure 8 This is a schematic diagram of the structure of the display device provided in Embodiment 3 of the present invention;

[0055] Figure 9 This is a schematic diagram of the first process of the driving method for the display panel provided in Embodiment 4 of the present invention;

[0056] Figure 10This is a schematic diagram of a second process for driving a display panel according to Embodiment 4 of the present invention.

[0057] The figures in the diagram are labeled as follows:

[0058] 1. Display panel driving circuit; 2. Display panel; 3. Power supply module; 10. Temperature compensation circuit; 20. Low-power driving circuit; 30. Power protection circuit; 40. Main control circuit; 11. Temperature tracking circuit; 12. Drive voltage generation circuit; 41. Current monitoring circuit; 42. Temperature sensing circuit; 43. Controller; 44. Inverter; 21. Programmable protection chip; 211. Voltage regulator; 212. Voltage protection circuit; 213. Overcurrent protection circuit; 214. Charge pump; 215. Short circuit protection circuit; 216. Over-temperature protection circuit; 217. Logic controller; 218. Switch driving circuit; 219. Output circuit; 111. Voltage divider network; 112. Digital reference injection circuit;

[0059] R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor; R5, fifth resistor; R6, sixth resistor; R7, seventh resistor; R0, thermistor; Ra, first isolation resistor; Rb, second isolation resistor; Q1, transistor; U1, power management integrated circuit; U2, error amplifier; Q2, mode switch; Rx, current limiting resistor; K1, first transistor; K2, second transistor; K3, third transistor; K4, fourth transistor; K5, fifth transistor; U1C, first operational amplifier; U2C, second operational amplifier; Qf, power transistor; Qd, internal transistor; VDD, positive voltage terminal;

[0060] Vout, drive signal; VGH, drive voltage; VR1, grayscale voltage; V01, positive power supply; V02, negative power supply; IB1, first bias current; IB2, second bias current. Detailed Implementation

[0061] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0062] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0063] Example 1

[0064] A first aspect of the present invention provides a driving circuit 1 for a display panel.

[0065] like Figure 1 As shown, the driving circuit 1 of the display panel includes:

[0066] Temperature compensation circuit 10, connected to display panel 2, is used to adjust the driving voltage VGH applied to display panel 2 in real time according to changes in ambient temperature.

[0067] The low-power driving circuit 20 is connected to the display panel 2 and is used to switch to low-power mode or high-performance mode according to the mode switching signal, and to provide the display panel 2 with the corresponding driving signal Vout.

[0068] The power protection circuit 30 is connected to the power module 3 and is used to monitor the operating current of the drive circuit 1 of the display panel in real time. When the operating current exceeds the preset current threshold, the corresponding current protection action is performed.

[0069] The main control circuit 40 is connected to the temperature compensation circuit 10, the low-power drive circuit 20, and the power protection circuit 30, respectively. The main control circuit 40 is used for:

[0070] Collect ambient temperature, operating current, and the display content of display panel 2;

[0071] Based on the collected ambient temperature, operating current and display content, the current operating mode of display panel 2 is determined;

[0072] Based on the determined current operating mode, a set of cooperative control parameters is generated. The set of cooperative control parameters includes a temperature compensation reference voltage for the temperature compensation circuit 10, a mode switching signal for the low-power drive circuit 20, and a current threshold for the power protection circuit 30.

[0073] The parameters in the collaborative control parameter set are synchronously sent to the corresponding temperature compensation circuit 10, low-power drive circuit 20 and power protection circuit 30, so that each circuit works collaboratively based on the collaborative control parameter set.

[0074] In this embodiment, the driving circuit 1 of the display panel can be divided into a sensing layer, a decision layer and an execution layer. The main control circuit 40 completes the work of the sensing layer and the decision layer, while the execution layer is implemented by the temperature compensation circuit 10, the low-power driving circuit 20 and the power protection circuit 30.

[0075] like Figure 2 As shown, the perception layer, as the system's "data acquisition terminal," is responsible for collecting three core types of data in real time: ambient temperature, system operating current, and the dynamic level of the displayed screen, providing accurate and real-time input for the decision-making of the main control circuit 40.

[0076] The sensing layer can employ a corresponding temperature acquisition unit, current acquisition unit, and display content load recognition unit. The temperature acquisition unit is used to acquire the ambient temperature, the current acquisition unit is used to acquire the operating current of the drive circuit 1 of the display panel, and the display content recognition unit directly reads the frame buffer data of the timing controller of the display panel 2 from the main control circuit 40. By analyzing the inter-frame pixel change rate, it identifies the dynamic level of the current display content in real time and outputs a load status signal (low load, medium load, high load).

[0077] The main control circuit 40, as the core of the decision-making layer, runs the system control algorithm and completes multi-source information fusion, working mode decision-making, collaborative control parameter set generation and instruction issuance.

[0078] The main control circuit 40 acquires the ambient temperature, operating current and display content load of the current display panel 2 in real time, and integrates the three types of data synchronously to eliminate data interference and ensure the accuracy of decision-making.

[0079] For example, when the ambient temperature drops sharply, the system combines the trend of the operating current and the display load to determine whether it is necessary to switch to the low-temperature high-performance mode, thus avoiding decision-making bias caused by a single data point.

[0080] Based on the fused multi-source information and combined with the power supply status, the optimal system operating mode is determined by querying a preset mode mapping table or an operational decision algorithm.

[0081] The system can have multiple operating modes, such as low-temperature high-performance mode, normal-temperature equilibrium mode, high-temperature low-power mode, and battery-saving mode.

[0082] The low-temperature high-performance mode can be triggered when the ambient temperature is below the low-temperature threshold and the load of the displayed content exceeds the load threshold. It is suitable for scenarios such as low-temperature startup and high-dynamic video playback, ensuring display performance and eliminating low-temperature ghosting.

[0083] The ambient temperature balance mode can be triggered when the ambient temperature exceeds the low temperature threshold but does not reach the high temperature threshold, and the display content load is within the load threshold. It is suitable for scenarios such as normal operation and alternation of static and dynamic images. Its core purpose is to balance power consumption and performance.

[0084] The high temperature and low power consumption mode can be triggered when the ambient temperature exceeds the high temperature threshold and the load of the displayed content is lower than the load threshold. It is suitable for high temperature static display scenarios. The core purpose is to reduce power consumption, reduce heat generation, and avoid screen whitening.

[0085] Battery power saving mode can be triggered when the battery powers the display device and the load on the display content is below the load threshold. It is suitable for scenarios such as parking and standby. Its core purpose is to minimize power consumption and extend battery life.

[0086] The main control circuit 40 generates a globally optimal set of cooperative control parameters based on the determined current operating mode. The set of cooperative control parameters includes a temperature compensation reference voltage for the temperature compensation circuit 10, a mode switching signal for the low-power drive circuit 20, and a current threshold for the power protection circuit 30. The generation logic of each parameter follows the system strategy to ensure that each parameter matches each other and avoids conflicts between modules.

[0087] Meanwhile, to ensure synchronous switching of the states of each circuit and avoid transition period conflicts, the main control circuit 40 can execute the instruction issuance operation sequentially without delay within an extremely short interrupt service cycle, forming an atomic operation, ensuring that the temperature compensation circuit 10, low-power drive circuit 20, and power protection circuit 30 respond synchronously, and avoiding system instability caused by instruction issuance delay.

[0088] The temperature compensation circuit 10 receives the temperature compensation reference voltage sent by the main control circuit 40, and adjusts the driving voltage VGH applied to the display panel 2 in real time in combination with the instantaneous change of ambient temperature, so as to realize the hybrid compensation of "digital setting baseline and analog fine tracking" and solve the defects of blind operation and uncontrollability of traditional compensation circuit.

[0089] The low-power drive circuit 20 receives the mode switching signal sent by the main control circuit 40 and flexibly switches between low-power mode and high-performance mode. In the corresponding mode, it provides the corresponding drive signal Vout to the display panel 2 to achieve precise allocation of power consumption and performance, breaking the contradiction of low static power consumption and poor dynamic performance of traditional low-power circuits.

[0090] The power protection circuit 30 receives the dynamic current threshold issued by the main control circuit 40, monitors the operating current of the display device in real time, and quickly executes protection actions when the operating current exceeds the current threshold set by the instruction, such as cutting off the power supply circuit, limiting power output, and outputting an alarm signal to the main control circuit 40 or directly triggering the alarm device, thereby realizing dynamic protection threshold, reducing false protection, and improving system reliability.

[0091] For example, in low-temperature high-performance mode, the main control circuit 40 issues instructions corresponding to the collaborative control parameter set and outputs the temperature compensation reference voltage to the temperature compensation circuit 10 to achieve coarse adjustment of the temperature compensation of the drive voltage VGH.

[0092] The driving voltage VGH output by the temperature compensation circuit 10 can be:

[0093] VGH = V1 + K(T1 - T0);

[0094] Where K is the temperature compensation coefficient of the temperature compensation circuit 10, V1 represents the temperature compensation reference voltage, T1 represents the ambient temperature, and T0 represents the reference temperature.

[0095] The temperature compensation reference voltage changes negatively with the ambient temperature; the higher the temperature, the lower the temperature compensation reference voltage, and the lower the temperature, the higher the temperature compensation reference voltage.

[0096] For example, at normal temperature, the temperature compensation reference voltage output by the main control circuit 40 is 2V. At low temperature, the temperature compensation reference voltage is switched to 5V, so that the driving voltage VGH has different compensation baselines and achieves different compensation effects.

[0097] Meanwhile, the temperature compensation circuit 10 also generates a change value of the driving voltage VGH based on the difference in ambient temperature and the compensation coefficient. The change value of the driving voltage VGH is used to quickly fine-tune the instantaneous change in ambient temperature based on the temperature compensation reference voltage, so as to achieve continuous and accurate temperature tracking.

[0098] After increasing the temperature compensation reference voltage, the main control circuit 40 controls the display panel 2 to switch to high performance mode and increases the output power of the drive signal Vout to achieve high load drive.

[0099] Then, as the driving voltage VGH and output power increase, the operating current of the display device increases accordingly. In order to prevent the power protection circuit 30 from being falsely triggered, the main control circuit 40 synchronously sends an adjusted current threshold. The current threshold is relatively larger than the current threshold in normal temperature and / or low power mode. The power protection circuit 30 obtains the operating current and compares it with the adjusted current threshold. When the operating current exceeds the current threshold, the power supply circuit is cut off, thereby causing the driving circuit 1 of the display panel to stop working.

[0100] Similarly, when switching to other operating modes, the main control circuit 40 synchronously adjusts the temperature compensation reference voltage, the operating mode of the low-power drive circuit 20, and the current threshold of the power protection circuit 30.

[0101] The temperature compensation reference voltage changes negatively with the ambient temperature, while the current threshold changes accordingly with the driving voltage VGH of the temperature compensation circuit 10 and the low-power driving circuit 20. The higher the driving voltage VGH and the higher the high-performance mode, the higher the current threshold is adjusted. The lower the driving voltage VGH and the lower the low-power mode, the lower the current threshold is adjusted, thereby matching the operating current change of the driving circuit 1 of the current display panel.

[0102] Simultaneously, after issuing the command, the main control circuit 40 also performs status monitoring and parameter fine-tuning to achieve closed-loop drive control. In an optional embodiment, the main control circuit 40 is further used for:

[0103] After the command is issued, the operating current is continuously monitored;

[0104] If the operating current is less than the adjusted current threshold, the current set of coordinated control parameters is maintained.

[0105] If the operating current exceeds the adjusted current threshold, adjust at least one of the parameters of the temperature compensation reference voltage, the mode switching signal, and the current threshold until the operating current is less than the adjusted current threshold.

[0106] In this embodiment, during the monitoring phase, the main control circuit 40 verifies whether the state of each circuit is consistent with the expectation at a set time interval, continuously monitors the actual operating current of the system, and compares the operating current with the adjusted current threshold. If the current meets the expectation, that is, the operating current is less than the current threshold, the system maintains the current mode, that is, maintains the current system control parameter set and corresponding instructions, so that the current threshold of the power protection circuit 30 is set to the adjusted current threshold, and the temperature compensation reference voltage of the temperature compensation circuit 10 is maintained and the current working mode of the low power driving circuit 20 is maintained.

[0107] When the ambient temperature or the low-power drive circuit 20 changes, the operating current exceeds the adjusted current threshold, causing the current to deviate from the expected value. The coordinated control parameter set is adjusted, and the current ambient temperature and display content are collected simultaneously. The system control parameter set is regenerated, and the temperature compensation reference voltage, mode switching signal and current threshold are fine-tuned and monitored again until the current threshold is less than the adjusted current threshold. This avoids malfunction of the drive circuit 1 of the display panel and forms an adaptive internal loop control to ensure control accuracy.

[0108] Meanwhile, after maintaining the current state, the main control circuit 40 also synchronously monitors whether an external shutdown command or hibernation command is received. If the corresponding shutdown command or hibernation command is received, an orderly safety shutdown process is executed and the operation ends.

[0109] The main control circuit 40 also synchronously monitors the working status of each module circuit in the display device. When any module circuit reports a fault signal, the main control circuit 40 triggers a high-level interrupt and starts a safe shutdown procedure to cut off or limit the power output. It also stores complete fault field data, including data from each sensor, control parameters, and timestamps, into a non-volatile memory to achieve data backup. The system then enters a safe state and waits for subsequent testing or restart.

[0110] Among them, the temperature compensation circuit 10, the low-power drive circuit 20 and the power protection circuit 30 have been adjusted accordingly compared with the conventional circuit to achieve adaptive adjustment of the temperature compensation baseline, mode and current threshold. The structure of each circuit can be set according to the requirements.

[0111] The main control circuit 40 realizes parameter status acquisition, processing and command issuance. It can adopt corresponding acquisition and monitoring circuits and main control units, and the specific structure can be designed based on the corresponding functions.

[0112] The beneficial effects of the present invention embodiment compared with the prior art are as follows: The driving circuit 1 of the above-mentioned display panel includes a temperature compensation circuit 10, a low-power driving circuit 20, a power protection circuit 30, and a main control circuit 40. The main control circuit 40 acquires the ambient temperature, operating current, and display content, and generates a set of collaborative control parameters accordingly. The set of collaborative control parameters is then output to the temperature compensation circuit 10, the low-power driving circuit 20, and the power protection circuit 30, respectively. The temperature compensation reference voltage, operating mode, and overcurrent protection threshold of the temperature compensation circuit 10 are adjusted accordingly, realizing the synchronous optimization of compensation voltage, driving mode, and protection threshold, forming a closed-loop collaborative system without information silos, and improving performance, power consumption, and reliability under wide temperature range and variable load scenarios.

[0113] Example 2

[0114] Based on Example 1, such as Figure 3 As shown, in an optional embodiment, the temperature compensation circuit 10 includes:

[0115] Temperature tracking circuit 11 is used to generate a first adjustment voltage in response to instantaneous changes in ambient temperature;

[0116] The driving voltage generation circuit 12 is connected to the temperature tracking circuit 11 and the main control circuit 40 respectively. It is used to receive the temperature compensation reference voltage sent by the main control circuit 40 as the second adjustment voltage, and adjust the driving voltage VGH applied to the display panel 2 according to the synthesis result of the first adjustment voltage and the second adjustment voltage.

[0117] In this embodiment, the driving voltage VGH can be:

[0118] VGH = V11 + V12; or

[0119] VGH = k1 * V11 + k2 * V12;

[0120] Wherein, V11 represents the first adjustment voltage, V12 is the second adjustment voltage, k1 represents the first compensation coefficient, and k2 represents the second compensation coefficient. k1 and k2 can be set accordingly.

[0121] The first adjustment voltage is generated by the temperature tracking circuit 11. The temperature tracking circuit 11 acquires the ambient temperature in real time and generates the first adjustment voltage accordingly. The higher the temperature, the smaller the first adjustment voltage, and the lower the temperature, the larger the first adjustment voltage.

[0122] The second adjustment voltage is generated by the main control circuit 40 according to the change of ambient temperature. The higher the temperature, the smaller the first adjustment voltage, and the lower the temperature, the larger the first adjustment voltage. The second adjustment voltage serves as the temperature compensation reference voltage to achieve coarse adjustment of the drive voltage VGH. The first adjustment voltage changes according to the instantaneous change of ambient temperature to achieve fine adjustment of the drive voltage VGH.

[0123] The driving voltage generation circuit 12 generates a matching driving voltage VGH based on the synthesis result of the first adjustment voltage and the second adjustment voltage, and outputs it to the display panel 2, thereby realizing continuous and accurate temperature tracking.

[0124] The driving voltage VGH can be the horizontal enable signal, the horizontal disable signal, the common electrode voltage, etc.

[0125] The temperature tracking circuit 11 can adopt a corresponding thermistor R0, voltage divider resistor, etc., and the driving voltage generation circuit 12 can adopt a corresponding voltage source, power supply chip, etc. In an optional embodiment, such as Figure 4 As shown, the temperature tracking circuit 11 includes:

[0126] Voltage divider network 111;

[0127] Thermistor R0 is connected in series with voltage divider network 111. Thermistor R0 is used to generate a corresponding voltage signal according to the ambient temperature. Voltage divider network 111 is used to divide the voltage signal and output the first adjustment voltage.

[0128] The digital reference injection circuit 112 includes a first isolation resistor Ra and a second isolation resistor Rb. The first isolation resistor Ra is connected in series between the reference node of the voltage divider network 111 and the drive voltage generation circuit 12, and the second isolation resistor Rb is connected between the output terminal of the main control circuit 40 and the drive voltage generation circuit 12.

[0129] In this embodiment, the voltage divider network 111 includes a first resistor R1 and a second resistor R2, and a thermistor R0. The first end of the first resistor R1, the first end of the thermistor R0, and the positive voltage terminal VDD are connected. The second end of the first resistor R1, the second end of the thermistor R0, the first end of the second resistor R2, and the first isolation resistor Ra are connected. The second end of the second resistor R2 is grounded. The second end of the first isolation resistor Ra and the second end of the second isolation resistor Rb constitute the output terminal of the temperature tracking circuit 11. The second end of the second isolation resistor Rb is connected to the signal terminal of the main control circuit 40. The connection node of the first resistor R1 and the second resistor R2 constitutes the reference node of the voltage divider network 111. The main control circuit 40 outputs a second adjustment voltage according to the ambient temperature. At the same time, the resistance of the thermistor R0 changes according to the ambient temperature and is connected in parallel with the first resistor R1 to generate a first adjustment voltage to the reference node.

[0130] The first adjustment voltage and the second adjustment voltage are output by superimposing the first isolation resistor Ra and the second isolation resistor Rb, respectively. The output voltage of the temperature tracking circuit 11 is:

[0131] VB = α*V11 + β*V12;

[0132] Wherein, α and β are network coefficients, which are determined by the first isolation resistor Ra, the second isolation resistor Rb, and the voltage divider network 111.

[0133] The driving voltage generation circuit 12 may include a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a transistor Q1, and a power management integrated chip U1.

[0134] The first end of the third resistor R3 is connected to the positive voltage terminal VDD. The second end of the third resistor R3, the first end of the fourth resistor R4, and the first end of the fifth resistor R5 are connected to the feedback terminal of the power management integrated chip U1. The second end of the fourth resistor R4 is connected to the collector of the transistor Q1. The base of the transistor Q1 is connected to the output terminal of the temperature tracking circuit 11. The emitter of the transistor Q1 is grounded. The second end of the fifth resistor R5 is connected to the first end of the sixth resistor R6. The second end of the sixth resistor R6 is grounded. The output terminal of the power management integrated chip U1 is connected to the first end of the seventh resistor R7 to form the output terminal of the drive voltage generation circuit 12. The second end of the seventh resistor R7 is grounded.

[0135] Transistor Q1 amplifies the output voltage of temperature tracking circuit 11 and feeds it back to the feedback terminal of power management integrated chip U1 through the fourth resistor R4. That is, the feedback voltage received by power management integrated chip U1 can be equal to:

[0136] Vfb=k(α*V11 +β*V12)

[0137] k represents the amplification factor of transistor Q1.

[0138] The power management integrated chip U1 outputs a drive voltage VGH based on the positive correlation of the received feedback voltage.

[0139] When the ambient temperature changes, the temperature tracking circuit 11 acquires the ambient temperature in real time and generates a first adjustment voltage in response. The main control circuit 40 generates a second adjustment voltage according to the change in ambient temperature. The second adjustment voltage serves as the temperature compensation reference voltage to achieve coarse adjustment of the drive voltage VGH. The first adjustment voltage changes according to the instantaneous change in ambient temperature to achieve fine adjustment of the drive voltage VGH. The result of the synthesis of the first and second adjustment voltages is amplified by the transistor Q1 and fed back to the power management integrated chip, which outputs a matching drive voltage to achieve dynamic temperature compensation and switching adjustment of the compensation curve.

[0140] In an alternative embodiment, such as Figure 5 As shown, the low-power drive circuit 20 includes:

[0141] Error amplifier U2 has its first input terminal used to input the grayscale voltage VR1 output by the main control circuit 40, and its second input terminal connected to the data line of the display panel 2. Error amplifier U2 is used to compare the grayscale voltage VR1 with the drive signal Vout of the display panel 2 to generate an error amplification signal.

[0142] The power transistor Qf is connected to the output of the error amplifier U2 and is used to generate the drive signal Vout based on the error amplification signal.

[0143] The current-limiting resistor Rx is connected between the output terminal of the power transistor Qf and the data line of the display panel 2;

[0144] The mode switching switch Q2 is connected in parallel across the current limiting resistor Rx. The mode switching switch Q2 is used to trigger the on / off state according to the mode switching signal to switch to low power mode or high performance mode.

[0145] In this embodiment, when it is necessary to control the low-power driving circuit 20 to work in low-power mode, the main control circuit 40 outputs a mode switching signal to the mode switching switch Q2 to turn off. At this time, the current limiting resistor Rx is connected in series between the driving transistor and the output terminal of the low-power driving circuit 20. The current limiting resistor Rx limits the output current, so that the display panel 2 works in a low static current state.

[0146] Meanwhile, the error amplifier U2 receives the grayscale voltage VR1 in low-power mode and compares the grayscale voltage VR1 with the drive signal Vout output to the data line of the display panel 2 to generate an error amplification signal. When there is a static picture or low dynamic content, the drive signal Vout is equal to the current grayscale voltage VR1. At this time, the error amplification signal output by the error amplifier U2 is small, the drive tube flows through the static current, and the current is small. After the current is limited by the current limiting resistor Rx, the drive current is further reduced.

[0147] Meanwhile, when switching from low-power mode to high-performance mode, the error amplifier U2 receives the changing grayscale voltage VR1, and the load on the display panel 2 increases. At this time, the difference between the drive signal Vout and the grayscale voltage VR1 increases, and the error amplification signal becomes larger compared to the low-power mode. Correspondingly, the output current and voltage of the drive transistor increase.

[0148] At the same time, the main control circuit 40 outputs a mode switching signal to control the mode switching switch Q2 to turn on, the current limiting resistor Rx is short-circuited, and the large current and large voltage are directly output to the data line by the power transistor Qf, and control the display panel 2 to work in high performance mode.

[0149] The error amplifier U2, power transistor Qf, and other components can be composed of corresponding operational amplifiers and switching transistors. In one optional embodiment, such as... Figure 6 As shown, the error amplifier U2 consists of a first operational amplifier U1C and a second operational amplifier U2C. The power transistor Qf is composed of a third transistor K3, a fourth transistor K4, and a fifth transistor K5. The non-inverting input terminals of the first operational amplifier U1C and the second operational amplifier U2C are used to input the grayscale voltage VR1. The output terminals of the first operational amplifier U1C and the second operational amplifier U2C are connected to the data lines of the display panel 2. V01 and V02 are the positive power supply V01 and the negative power supply V02, respectively, providing pull-up and pull-down currents for the power transistor Qf.

[0150] The first operational amplifier U1C and the second operational amplifier U2C form a differential amplifier, which compares the grayscale voltage VR1 with the output voltage and outputs an error amplification signal to the third transistor K3 and the fourth transistor K4, thereby adjusting the conduction level of the third transistor K3 and the fourth transistor K4.

[0151] When a large output voltage is required, the first operational amplifier U1C outputs an error amplification signal to control the third transistor K3 to conduct deeply, providing a large current from the positive power supply V01 to the display panel 2. When a low output voltage is required, the second operational amplifier U2C outputs an error amplification signal and controls the fourth transistor K4 to conduct, drawing current from the drive signal Vout.

[0152] Among them, IB1 and IB2 are bias sources that provide the first bias current and the second bias current to the first operational amplifier U1C and the second operational amplifier U2C respectively, and determine the transconductance of the first operational amplifier U1C and the second operational amplifier U2C and the quiescent current of the output stage, thereby determining the power consumption and operating speed of the operational amplifier.

[0153] In low-power mode, a static image is displayed. At this time, the drive signal Vout input to the inverting input terminals of the first operational amplifier U1C and the second operational amplifier U2C is equal to the current grayscale voltage VR1. The differential pair is in a balanced state, and the third transistor K3 only flows through a small static current set by the second operational amplifier U2C.

[0154] At the same time, the mode switching switch Q2 is triggered to turn off, and the static current is further limited by the current limiting resistor Rx, thus achieving low power output.

[0155] When switching to high-performance mode, the grayscale voltage VR1 changes, and the difference between the grayscale voltage VR1 and the drive signal Vout increases. The error amplification signal output by the first operational amplifier U1C increases, and the third transistor K3 switches from a low conduction state to a deep conduction state, drawing a large current from the positive power supply V01 and charging the data line of the display panel 2. Alternatively, the error amplification signal output by the second operational amplifier U2C increases, and the fourth transistor K4 discharges. At the same time, the mode switching switch Q2 is triggered to conduct according to the mode switching signal and short-circuit the current limiting resistor Rx. The data line of the display panel 2 is quickly charged or discharged, quickly pulling the drive signal Vout up or down to the target grayscale voltage VR1.

[0156] By setting the mode switching switch Q2 and the current limiting resistor Rx, the low-power drive circuit 20 is transformed into an actively configurable resource. The main control circuit 40 can allocate drive capability according to the anticipated load demand, so as to achieve precise on-demand allocation of power consumption and performance.

[0157] The main control circuit 40 can be directly connected to the mode switching switch Q2, or connected to the mode switching switch Q2 through a corresponding signal conversion circuit. In an optional embodiment, in order to improve the driving capability, an inverter 44 is also provided between the main control circuit 40 and the mode switching switch Q2. The inverter 44 includes a first transistor K1 and a second transistor K2. The first transistor K1 and the second transistor K2 are connected in series to the positive voltage terminal VDD and the ground terminal. The connection node of the first transistor K1 and the second transistor K2 constitutes the output terminal of the inverter 44. The control terminal of the first transistor K1 and the control terminal of the second transistor K2 are connected to the main control circuit 40. When the main control circuit 40 outputs a high level, the second transistor K2 is triggered to conduct and inverts and amplifies to output a low level. When the main control circuit 40 outputs a low level, the first transistor K1 conducts and inverts to output a high level.

[0158] The mode switching switch Q2 can be turned on and off according to the level signal output by the main control circuit 40 or the level signal output by the inverter 44. For example, when it is necessary to control the low-power drive circuit 20 to switch to low-power mode, the main control circuit 40 outputs a low level, the inverter 44 outputs a high level, the mode switching switch Q2 is turned off, and the low-power drive circuit 20 switches to output a small current to achieve low-power drive. When it is necessary to control the low-power drive circuit 20 to switch to high-performance mode, the main control circuit 40 outputs a high level, the inverter 44 outputs a low level, and the mode switching switch Q2 is turned on, and the low-power drive circuit 20 switches to output a large current to achieve high-performance drive.

[0159] The power protection circuit 30 can adopt a corresponding overcurrent protection chip or similar structure. In an optional embodiment, such as... Figure 7As shown, the power protection circuit 30 includes a programmable protection chip 21, which is connected between the power module 3 and the load. The programmable interface GPIO of the programmable protection chip 21 is connected to the main control circuit 40 and receives the current threshold.

[0160] The programmable protection chip 21 is used to monitor the operating current based on the current threshold issued by the main control circuit 40. When the operating current exceeds the current threshold, the power supply circuit between the power module 3 and the load is cut off.

[0161] In this embodiment, the programmable protection chip 21 is equipped with a programmable interface GPIO and receives the current threshold generated by the main control circuit 40. The programmable protection chip 21 is connected to the output terminal of the power module 3 and monitors the operating current in real time. It compares the operating current with the current threshold. When the operating current exceeds the current threshold, the programmable protection chip 21 triggers overcurrent protection and triggers the shutdown of the internal power switch or the output circuit 219, thereby cutting off the power supply circuit.

[0162] Among them, such as Figure 7 As shown, the programmable protection chip 21 can internally be equipped with a voltage regulator 211, a logic controller 217, an overcurrent protection circuit 213, a short-circuit protection circuit 215, an overtemperature protection circuit 216, a charge pump 214, a switch drive circuit 218, an output circuit 219, etc. The voltage regulator 211 is used to receive the operating voltage of the power module 3 and perform regulated output, providing operating voltage for each circuit module inside the programmable protection chip 21. The voltage protection circuit 212 realizes voltage detection and outputs a voltage detection signal. The overcurrent protection circuit 213 is used to realize operating current detection and output a current detection signal. The short-circuit protection circuit 215 is used to detect the short-circuit state of the power module 3 and output a corresponding short-circuit detection signal. The overtemperature protection circuit 216 is used to realize the overcurrent protection circuit 217. The programmable protection chip 21 detects the internal temperature and outputs a temperature detection signal. The charge pump 214 provides a stable current to the switch drive circuit 218. The logic controller 217 outputs corresponding switch control signals to the switch drive circuit 218 and outputs control signals to the output circuit 219 based on the voltage detection signal, current detection signal, short circuit detection signal, and temperature detection signal. The switch drive circuit 218 receives the switch control signals, amplifies them, and outputs them to the internal switch transistor Qd of the programmable protection chip 21. The internal switch transistor Qd is connected between the output terminal of the power module 3 and the output circuit 219 and is switched on and off according to the drive signal Vout. At the same time, the output circuit 219 is switched on and off according to the control signal and realizes the output of the working current.

[0163] When the logic controller 217 detects one of the abnormal states of overvoltage, overcurrent, short circuit and overtemperature, the logic controller 217 controls the internal switching transistor Qd to turn off through the switch drive circuit 218 and controls the output circuit 219 to turn off, thereby cutting off the power supply circuit and realizing overvoltage, overcurrent, short circuit and overtemperature protection.

[0164] The main control circuit 40 can adopt a corresponding detection circuit and main control unit, such as Figure 3 As shown, in an optional embodiment, the main control circuit 40 includes:

[0165] Temperature sensing circuit 42 is used to detect ambient temperature and generate a temperature detection signal;

[0166] The current monitoring circuit 41 is connected to the power supply module 3 and is used to detect the operating current and generate a current detection signal.

[0167] The controller 43 is connected to the temperature sensing circuit 42, the current monitoring circuit 41, the temperature compensation circuit 10, the low-power driving circuit 20, and the power protection circuit 30, respectively. The controller 43 is used to perform data analysis on the display content and generate a load status signal, as well as generate a set of collaborative control parameters based on the temperature detection signal, the current detection signal, and the load status signal, so that each circuit can work collaboratively based on the set of collaborative control parameters.

[0168] In this embodiment, the temperature sensing circuit 42, the current monitoring circuit 41, and the controller 43 complete the work of the sensing layer. The temperature sensing circuit 42 is used to collect the ambient temperature, the current monitoring circuit 41 is used to collect the operating current of the drive circuit 1 of the display panel, and the display content recognition unit directly reads the frame buffer data of the timing controller of the display panel 2 from the controller 43. By analyzing the inter-frame pixel change rate, it identifies the dynamic level of the current display content in real time and outputs the load status signal (low load, medium load, high load).

[0169] The controller 43 performs the work of the decision-making layer. The controller 43 acquires the ambient temperature, operating current and display content load of the current display panel 2 in real time, and integrates the three types of data synchronously to eliminate data interference and ensure the accuracy of decision-making.

[0170] For example, when the ambient temperature drops sharply, the system combines the trend of the operating current and the display load to determine whether it is necessary to switch to the low-temperature high-performance mode, thus avoiding decision-making bias caused by a single data point.

[0171] Based on the fused multi-source information and combined with the power supply status, the optimal system operating mode is determined by querying a preset mode mapping table or an operational decision algorithm.

[0172] Based on the determined current operating mode, a globally optimal set of cooperative control parameters is generated. The set of cooperative control parameters includes a temperature compensation reference voltage for the temperature compensation circuit 10, a mode switching signal for the low-power drive circuit 20, and a current threshold for the power protection circuit 30. The generation logic of each parameter follows the system strategy to ensure that each parameter matches each other and avoids conflicts between modules.

[0173] Meanwhile, to ensure synchronous switching of the states of each circuit and avoid transition period conflicts, the main control circuit 40 can execute the instruction issuance operation sequentially without delay within an extremely short interrupt service cycle, forming an atomic operation, ensuring that the temperature compensation circuit 10, low-power drive circuit 20, and power protection circuit 30 respond synchronously, and avoiding system instability caused by instruction issuance delay.

[0174] Example 3

[0175] A third aspect of the present invention provides a display device, such as... Figure 10 As shown, the display device includes a display panel 2 and a driving circuit 1 for the display panel. The specific structure of the driving circuit 1 for the display panel is as described in the above embodiments. Since this display device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The driving circuit 1 for the display panel is connected to the display panel 2.

[0176] In this embodiment, the driving circuit 1 of the display panel may further include a corresponding gate driving circuit, a source driving circuit, a common electrode voltage circuit, and a timing controller. The gate driving circuit is used to output a horizontal scanning signal to the display panel 2 to control the display panel 2 to scan line by line. The horizontal scanning signal may include a horizontal enable signal and a horizontal disable signal. The source driving circuit is used to output a grayscale voltage VR1 to the display panel 2. The common electrode voltage circuit is used to output a common electrode voltage to the display panel 2. The timing controller is connected to the source driving circuit and the gate driving circuit respectively, and controls the gate driving circuit and the source driving circuit to work.

[0177] The temperature compensation circuit 10 can be connected to the front end of the gate drive circuit and / or the common electrode voltage circuit, and generates a drive voltage VGH to the gate drive circuit and / or the common electrode voltage circuit according to the ambient temperature, so that the gate drive circuit and / or the common electrode voltage circuit outputs a corresponding drive voltage VGH to the display panel 2 according to the adjusted drive voltage VGH.

[0178] The low-power driving circuit 20 can be connected inside the source driving circuit or at the back end of the source driving circuit, and adjust the driving current and driving voltage VGH of the data line output to the display panel 2 according to the gray level voltage VR1 output by the source driving circuit.

[0179] The power protection circuit 30 can be connected between the power module 3 and the timing controller and is used to detect the operating current.

[0180] Example 4

[0181] A third aspect of this invention provides a driving method for a display panel 2, applicable to the driving circuit 1 of the display panel as described above, such as... Figure 9 As shown, the driving method for display panel 2 includes:

[0182] S10. Collect ambient temperature, operating current of display panel 2, and display content of display panel 2;

[0183] S20. Based on the collected ambient temperature, operating current and display content, determine the current working mode of the display panel 2;

[0184] S30. Based on the determined current operating mode, generate a set of cooperative control parameters. The set of cooperative control parameters includes a temperature compensation reference voltage for the temperature compensation circuit 10, a mode switching signal for the low-power drive circuit 20, and a current threshold for the power protection circuit 30.

[0185] S40. The parameters in the collaborative control parameter set are synchronously sent to the corresponding temperature compensation circuit 10, low-power drive circuit 20 and power protection circuit 30, so that each circuit works collaboratively based on the collaborative control parameter set.

[0186] In this embodiment, the driving method of the display panel 2 adopts a perception-decision-execution step for panel control. The perception function can be implemented by a corresponding temperature acquisition unit, current acquisition unit, and display content load identification unit. The temperature acquisition unit is used to collect the ambient temperature, the current acquisition unit is used to collect the operating current of the driving circuit 1 of the display panel, and the display content identification unit directly reads the frame buffer data of the timing controller of the display panel 2 from the main control circuit 40. By analyzing the inter-frame pixel change rate, it identifies the dynamic level of the current display content in real time and outputs a load status signal (low load, medium load, high load).

[0187] The system acquires the ambient temperature, operating current, and display content load of the current display panel 2, and integrates these three types of data synchronously to eliminate data interference and ensure the accuracy of decision-making.

[0188] For example, when the ambient temperature drops sharply, the system combines the trend of the operating current and the display load to determine whether it is necessary to switch to the low-temperature high-performance mode, thus avoiding decision-making bias caused by a single data point.

[0189] Based on the fused multi-source information and combined with the power supply status, the optimal system operating mode is determined by querying a preset mode mapping table or an operational decision algorithm.

[0190] The system can have multiple operating modes, such as low-temperature high-performance mode, normal-temperature equilibrium mode, high-temperature low-power mode, and battery-saving mode.

[0191] The low-temperature high-performance mode can be triggered when the ambient temperature is below the low-temperature threshold and the load of the displayed content exceeds the load threshold. It is suitable for scenarios such as low-temperature startup and high-dynamic video playback, ensuring display performance and eliminating low-temperature ghosting.

[0192] The ambient temperature balance mode can be triggered when the ambient temperature exceeds the low temperature threshold but does not reach the high temperature threshold, and the display content load is within the load threshold. It is suitable for scenarios such as normal operation and alternation of static and dynamic images. Its core purpose is to balance power consumption and performance.

[0193] The high temperature and low power consumption mode can be triggered when the ambient temperature exceeds the high temperature threshold and the load of the displayed content is lower than the load threshold. It is suitable for high temperature static display scenarios. The core purpose is to reduce power consumption, reduce heat generation, and avoid screen whitening.

[0194] Battery power saving mode can be triggered when the battery powers the display device and the load on the display content is below the load threshold. It is suitable for scenarios such as parking and standby. Its core purpose is to minimize power consumption and extend battery life.

[0195] Based on the determined current operating mode, a globally optimal set of cooperative control parameters is generated. The set of cooperative control parameters includes a temperature compensation reference voltage for the temperature compensation circuit 10, a mode switching signal for the low-power drive circuit 20, and a current threshold for the power protection circuit 30. The generation logic of each parameter follows the system strategy to ensure that each parameter matches each other and avoids conflicts between modules.

[0196] Meanwhile, to ensure synchronous switching of the states of each circuit and avoid transition period conflicts, the main control circuit 40 can execute the instruction issuance operation sequentially without delay within an extremely short interrupt service cycle, forming an atomic operation, ensuring that the temperature compensation circuit 10, low-power drive circuit 20, and power protection circuit 30 respond synchronously, and avoiding system instability caused by instruction issuance delay.

[0197] The temperature compensation circuit 10 receives the temperature compensation reference voltage sent by the main control circuit 40, and adjusts the driving voltage VGH applied to the display panel 2 in real time in combination with the instantaneous change of ambient temperature, so as to realize the hybrid compensation of "digital setting baseline and analog fine tracking" and solve the defects of blind operation and uncontrollability of traditional compensation circuit.

[0198] The low-power drive circuit 20 receives the mode switching signal sent by the main control circuit 40 and flexibly switches between low-power mode and high-performance mode. In the corresponding mode, it provides the corresponding drive signal Vout to the display panel 2 to achieve precise allocation of power consumption and performance, breaking the contradiction of low static power consumption and poor dynamic performance of traditional low-power circuits.

[0199] The power protection circuit 30 receives the dynamic current threshold issued by the main control circuit 40, monitors the operating current of the display device in real time, and quickly executes protection actions when the operating current exceeds the current threshold set by the instruction, such as cutting off the power supply circuit, limiting power output, and outputting an alarm signal to the main control circuit 40 or directly triggering the alarm device, thereby realizing dynamic protection threshold, reducing false protection, and improving system reliability.

[0200] Furthermore, in order to achieve closed-loop control after issuing commands, the driving method of display panel 2 can also simultaneously perform status monitoring and parameter fine-tuning, such as... Figure 10 As shown, in an optional embodiment, S40 further includes:

[0201] S50. After the command is issued, the operating current is continuously monitored;

[0202] S60. If the operating current is less than the adjusted current threshold, maintain the current set of coordinated control parameters.

[0203] S70. If the operating current exceeds the adjusted current threshold, adjust at least one of the parameters of the temperature compensation reference voltage, the mode switching signal, and the current threshold until the operating current is less than the adjusted current threshold.

[0204] In this embodiment, the main control circuit 40 verifies whether the state of each circuit is consistent with the expectation at a set time interval during the monitoring phase, continuously monitors the actual operating current of the system, and compares the operating current with the adjusted current threshold. If the current meets the expectation, that is, the operating current is less than the current threshold, the system maintains the current mode, that is, maintains the current system control parameter set and corresponding instructions, so that the current threshold of the power protection circuit 30 is set to the adjusted current threshold, and the temperature compensation reference voltage of the temperature compensation circuit 10 is maintained and the current working mode of the low power driving circuit 20 is maintained.

[0205] When the ambient temperature or the low-power drive circuit 20 changes, the operating current exceeds the adjusted current threshold, causing the current to deviate from the expected value. The coordinated control parameter set is adjusted, and the current ambient temperature and display content are collected simultaneously. The system control parameter set is regenerated, and the temperature compensation reference voltage, mode switching signal and current threshold are fine-tuned and monitored again until the current threshold is less than the adjusted current threshold. This avoids malfunction of the drive circuit 1 of the display panel and forms an adaptive internal loop control to ensure control accuracy.

[0206] Meanwhile, while maintaining the current state, it also monitors whether an external shutdown command or hibernation command is received. If the corresponding shutdown command or hibernation command is received, it executes an orderly safety shutdown process and terminates operation.

[0207] In the driving method of display panel 2, the working status of each module circuit in the display device is also monitored synchronously. When any module circuit reports a fault signal, a high-level interrupt is triggered and a safe shutdown procedure is started to cut off or limit the power output. Complete fault field data, including data from each sensor, control parameters, and timestamps, are stored in non-volatile memory to achieve data backup. The system enters a safe state and waits for subsequent detection or restart.

[0208] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0209] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A driving circuit for a display panel, characterized in that, include: A temperature compensation circuit, connected to the display panel, is used to adjust the driving voltage applied to the display panel in real time according to changes in ambient temperature. A low-power driving circuit, connected to the display panel, is used to switch to a low-power mode or a high-performance mode according to a mode switching signal, and to provide a driving signal for the corresponding mode to the display panel. A power protection circuit, connected to the power module, is used to monitor the operating current of the drive circuit of the display panel in real time. When the operating current exceeds a preset current threshold, a corresponding current protection action is performed. The main control circuit is connected to the temperature compensation circuit, the low-power drive circuit, and the power protection circuit, respectively. The main control circuit is used for: The ambient temperature, the operating current, and the display content of the display panel are collected. Based on the collected ambient temperature, operating current, and display content, the current operating mode of the display panel is determined; Based on the determined current operating mode, a set of cooperative control parameters is generated, which includes a temperature compensation reference voltage for the temperature compensation circuit, a mode switching signal for the low-power drive circuit, and a current threshold for the power protection circuit. The parameters in the coordinated control parameter set are synchronously sent to the corresponding temperature compensation circuit, low-power drive circuit and power protection circuit, so that each circuit works in coordination based on the coordinated control parameter set.

2. The driving circuit for the display panel as described in claim 1, characterized in that, The temperature compensation circuit includes: A temperature tracking circuit is used to generate a first adjustment voltage in response to an instantaneous change in the ambient temperature; The driving voltage generation circuit is connected to the temperature tracking circuit and the main control circuit respectively. It is used to receive the temperature compensation reference voltage sent by the main control circuit as the second adjustment voltage, and adjust the driving voltage applied to the display panel according to the synthesis result of the first adjustment voltage and the second adjustment voltage.

3. The driving circuit for the display panel as described in claim 2, characterized in that, The temperature tracking circuit includes: Voltage divider network; A thermistor is connected in series with the voltage divider network. The thermistor is used to generate a corresponding voltage signal according to the ambient temperature. The voltage divider network is used to divide the voltage signal and output the first adjustment voltage. The digital reference injection circuit includes a first isolation resistor and a second isolation resistor. The first isolation resistor is connected in series between the reference node of the voltage divider network and the driving voltage generation circuit, and the second isolation resistor is connected between the output terminal of the main control circuit and the driving voltage generation circuit.

4. The driving circuit for the display panel as described in claim 1, characterized in that, The low-power driving circuit includes: An error amplifier is provided, wherein the first input terminal of the error amplifier is used to input the grayscale voltage output by the main control circuit, and the second input terminal of the error amplifier is connected to the data line of the display panel. The error amplifier is used to compare the grayscale voltage with the driving voltage of the display panel to generate an error amplification signal. A power transistor, connected to the output of the error amplifier, is used to generate a drive voltage based on the error amplification signal. A current-limiting resistor is connected between the output terminal of the power transistor and the data line of the display panel. A mode switching switch is connected in parallel across the current limiting resistor. The mode switching switch is used to trigger on / off switching according to the mode switching signal to switch to low power mode or high performance mode.

5. The driving circuit for the display panel as described in claim 1, characterized in that, The power protection circuit includes a programmable protection chip, which is connected between the power module and the load. The programmable interface of the programmable protection chip is connected to the main control circuit and receives the current threshold. The programmable protection chip is used to monitor the operating current based on the current threshold issued by the main control circuit, and when the operating current exceeds the current threshold, it cuts off the power supply circuit between the power module and the load.

6. The driving circuit for the display panel as described in claim 1, characterized in that, The main control circuit is also used for: After the instruction is issued, the operating current is continuously monitored; If the operating current is less than the adjusted current threshold, maintain the current set of cooperative control parameters. If the operating current exceeds the adjusted current threshold, at least one of the parameters of the temperature compensation reference voltage, the mode switching signal, and the current threshold is adjusted until the operating current is less than the adjusted current threshold.

7. The driving circuit for the display panel as described in any one of claims 1 to 6, characterized in that, The main control circuit includes: Temperature sensing circuit, used to detect ambient temperature and generate temperature detection signal; A current monitoring circuit, connected to the power supply module, is used to detect the operating current and generate a current detection signal; The controller is connected to the temperature sensing circuit, the current monitoring circuit, the temperature compensation circuit, the low-power driving circuit, and the power protection circuit, respectively. The controller is used to perform data analysis on the display content and generate a load status signal, and to generate a set of collaborative control parameters based on the temperature detection signal, the current detection signal, and the load status signal, so that each circuit can work collaboratively based on the set of collaborative control parameters.

8. A display device, characterized in that, It includes a display panel and a driving circuit for the display panel as described in any one of claims 1 to 7, wherein the driving circuit for the display panel is connected to the display panel.

9. A driving method for a display panel, applicable to the driving circuit of the display panel as described in any one of claims 1 to 7, characterized in that, The driving method for the display panel includes: Collect ambient temperature, operating current of the display panel, and display content of the display panel; Based on the collected ambient temperature, operating current, and display content, the current operating mode of the display panel is determined; Based on the determined current operating mode, a set of cooperative control parameters is generated, which includes a temperature compensation reference voltage for the temperature compensation circuit, a mode switching signal for the low-power drive circuit, and a current threshold for the power protection circuit. The parameters in the coordinated control parameter set are synchronously sent to the corresponding temperature compensation circuit, low-power drive circuit and power protection circuit, so that each circuit works in coordination based on the coordinated control parameter set.

10. The driving method for a display panel as described in claim 9, characterized in that, The step of synchronously sending each parameter in the coordinated control parameter set to the corresponding temperature compensation circuit, low-power drive circuit, and power protection circuit, so that each circuit works collaboratively based on the coordinated control parameter set, further includes: After the instruction is issued, the operating current is continuously monitored; If the operating current is less than the adjusted current threshold, maintain the current set of cooperative control parameters. If the operating current exceeds the adjusted current threshold, at least one of the parameters of the temperature compensation reference voltage, the mode switching signal, and the current threshold is adjusted until the operating current is less than the adjusted current threshold.

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