Display screen heating circuit and heating method thereof, display panel and display equipment

Abstract

The invention relates to the technical field of electronic equipment display, and discloses a display screen heating circuit and a heating method thereof, a display panel and display equipment. The display screen heating circuit comprises a liquid crystal screen module, wherein a heating film with the same size as a display area of the liquid crystal screen module is arranged on the back surface of a screen of the liquid crystal screen module; the control module is electrically connected with the liquid crystal screen module, and the control module is used for obtaining the current environment temperature of the liquid crystal screen module and determining a heating starting signal of the heating film according to the current environment temperature; the backlight driving module is electrically connected with the control module and the heating film, and the backlight driving module is used for accessing a heating starting signal sent by the control module and driving the heating film to heat the liquid crystal screen module according to the heating starting signal. The display working performance of the liquid crystal screen in a low-temperature environment is improved while the economic benefit of the liquid crystal screen is ensured.

Description

Technical Field

[0001] The present application relates to the field of electronic device display technology, and in particular to a display screen heating circuit and a heating method thereof, a display panel, and a display device. Background Art

[0002] With the continuous development of display technology of electronic devices, users have put forward higher requirements on the working performance of display screens (such as liquid crystal screens, etc.) in low temperature environments.

[0003] As the main display component of modern electronic devices, the working performance of LCD screens is significantly affected by the ambient temperature. In low temperature environments, LCD screens may not work properly due to low temperatures, resulting in abnormal display, color distortion, or even failure to light up, seriously affecting the user experience. Traditional solutions such as adding a temperature control system or increasing the backlight power can effectively increase the operating temperature of the LCD screen, but they are often accompanied by high costs and additional energy consumption, which is not conducive to the thinness, long battery life and cost control of the device.

[0004] In summary, while ensuring the economic benefits of LCD screens, how to improve the working performance of LCD screens in low temperature environments is a technical problem that needs to be solved urgently.

[0005] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art.

[0006] Application Contents

[0007] The main purpose of the present application is to provide a display screen heating circuit and a heating method thereof, a display panel and a display device, aiming to improve the working performance of the liquid crystal screen in a low temperature environment while ensuring the economic benefits of the liquid crystal screen.

[0008] To achieve the above object, the present application provides a display screen heating circuit, the display screen heating circuit comprising:

[0009] A liquid crystal screen module, wherein a heating film having the same size as the display area of ​​the liquid crystal screen module is arranged on the back of the screen of the liquid crystal screen module;

[0010] A control module, the control module is electrically connected to the liquid crystal module, and the control module is used to obtain the current ambient temperature of the liquid crystal module and determine a heating start signal of the heating film according to the current ambient temperature;

[0011] A backlight driving module is electrically connected to the control module and the heating film respectively. The backlight driving module is used to receive a heating start signal sent by the control module and drive the heating film to heat the liquid crystal screen module according to the heating start signal.

[0012] In one embodiment, the control module includes a temperature detection unit, a display driving unit and a control chip unit;

[0013] The temperature detection unit is arranged between the back of the screen and the heating film, the control chip unit is electrically connected to the temperature detection unit and the display driving unit respectively, and the display driving unit is electrically connected to the liquid crystal screen module;

[0014] The temperature detection unit is used to obtain the current ambient temperature of the LCD module when the display driving unit receives the display driving signal sent by the control chip unit to drive the LCD module to display, and send the current ambient temperature to the control chip unit;

[0015] The control chip unit is used to receive the current ambient temperature sent by the temperature detection unit, and determine a heating start signal for the heating film according to the current ambient temperature.

[0016] In one embodiment, the backlight driving module includes a power supply switching unit and a switch control unit;

[0017] The signal input end of the power supply switching unit is electrically connected to the control module, the signal output end of the power supply switching unit is connected to the signal control end of the switch control unit, the first passage end of the switch control unit is electrically connected to the liquid crystal screen module, and the second passage end of the switch control unit is electrically connected to the heating film.

[0018] In one embodiment, the power supply switching unit includes a P-type MOS tube and an N-type MOS tube;

[0019] The gate terminal of the P-type MOS tube is electrically connected to the gate terminal of the N-type MOS tube;

[0020] The connection intersection where the gate end of the P-type MOS tube is electrically connected to the gate end of the N-type MOS tube constitutes the signal input end of the power supply switching unit, and is electrically connected to the control module;

[0021] The source terminal of the P-type MOS tube is electrically connected to the positive power supply terminal, the source terminal of the N-type MOS tube is electrically connected to the negative power supply terminal, and the drain terminal of the P-type MOS tube is electrically connected to the drain terminal of the N-type MOS tube;

[0022] A connection node where the drain end of the P-type MOS tube is electrically connected to the drain end of the N-type MOS tube constitutes a signal output end of the power supply switching unit, and is electrically connected to a signal control end of a switch control unit.

[0023] In one embodiment, the liquid crystal screen module includes: a liquid crystal drive circuit, a backlight lamp bead module and a liquid crystal display screen;

[0024] The liquid crystal driving circuit is arranged in the non-display area of ​​the liquid crystal screen module, the liquid crystal display screen is arranged in the display area, and the non-display area surrounds the edge boundary of the display area;

[0025] The backlight lamp bead module is arranged at an area on the back of the screen that overlaps with the display area.

[0026] In addition, to achieve the above-mentioned purpose, the present application provides a heating method for a display screen heating circuit, the heating method for the display screen heating circuit is applied to the above-mentioned display screen heating circuit, and the heating method for the display screen heating circuit includes:

[0027] Acquiring the current ambient temperature of the LCD module through the control module, and determining a heating start signal of the heating film according to the current ambient temperature;

[0028] When the backlight driving module receives the heating start signal sent by the control module, the heating film arranged on the back side of the screen of the liquid crystal module is driven according to the heating start signal to heat the liquid crystal module.

[0029] In one embodiment, the step of determining the heating start signal of the heating film according to the current ambient temperature includes:

[0030] Determine whether the current ambient temperature is lower than the lowest ambient temperature when the LCD module displays normally;

[0031] If the current ambient temperature is greater than or equal to the minimum ambient temperature, the temperature detection unit continuously obtains the current ambient temperature of the LCD module until the current ambient temperature is less than the minimum ambient temperature, triggering the control module to send a heating start signal for the heating film to the backlight drive module.

[0032] In one embodiment, after the step of driving a heating film disposed on the back of the LCD module screen to heat the LCD module according to the heating start signal, the heating method further comprises:

[0033] The screen heating temperature of the liquid crystal module when the heating film is heating is continuously obtained by the temperature detection unit until the screen heating temperature rises to the lowest ambient temperature when the liquid crystal module displays normally, so that the heating film can continuously maintain the screen heating temperature to be the same as the lowest ambient temperature;

[0034] When the average operating temperature of the liquid crystal driving circuit reaches the minimum ambient temperature, the heating film is enabled to stop heating the liquid crystal screen module under the driving of the heating stop signal of the control module.

[0035] In addition, to achieve the above-mentioned purpose, the present application provides a display panel, which includes the above-mentioned display screen heating circuit.

[0036] In addition, to achieve the above-mentioned purpose, the present application provides a display device, the display device comprising the above-mentioned display panel; or,

[0037] The display device includes a processor, a memory, and a heating program of a display screen heating circuit stored in the memory and executable by the processor, wherein when the heating program of the display screen heating circuit is executed by the processor, the steps of the heating method of the display screen heating circuit are implemented.

[0038] In summary, in response to the technical problem that the working performance of the liquid crystal screen is affected by the low temperature in a low temperature environment, this application provides a display screen heating circuit and its heating method, a display panel and a display device, aiming to improve the working performance of the liquid crystal screen in a low temperature environment while ensuring the economic benefits of the liquid crystal screen. Specifically, the display screen heating circuit sets a low-cost heating film of the same size as the display area on the back of the liquid crystal screen module, which not only saves the heating cost of the liquid crystal screen in a low temperature environment, but also realizes the thinness of the liquid crystal screen; in addition, this application is equipped with a control module that can monitor the current ambient temperature of the liquid crystal screen module in real time and send a heating start signal to the backlight drive module according to the current ambient temperature, so that the backlight drive module drives the heating film according to the heating start signal to heat the liquid crystal screen module in a low temperature environment, which not only avoids the high cost and extra energy consumption brought by the traditional temperature control system and high backlight power, but also effectively solves the problems of display abnormality and color distortion caused by low temperature, thereby significantly improving the working performance of the liquid crystal screen in a low temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of the overall structure of the display screen heating circuit of this application;

[0040] Figure 2 A circuit connection diagram of the display screen heating circuit of the present application;

[0041] Figure 3 This is a schematic diagram of the backlight driving module circuit involved in the display screen heating circuit of this application;

[0042] Figure 4 This is a flow chart of an embodiment of a heating method for a display screen heating circuit of the present application;

[0043] Figure 5 This is a schematic diagram of the device structure of the hardware operating environment involved in this application.

[0044] Description of Figure Numbers:

[0045] 10. LCD screen module; 20. Control module; 30. Backlight driver module; 21. Temperature detection unit; 22. Display driver unit; 23. Control chip unit; 31. Power supply switching unit; 32. Switch control unit; Q1. P-type MOS tube; Q2. N-type MOS tube.

[0046] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0048] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0049] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0050] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. 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 this application.

[0052] With the continuous development of display technology of electronic devices, users have put forward higher requirements on the working performance of display screens (such as liquid crystal screens, etc.) in low temperature environments.

[0053] As the main display component of modern electronic devices, the working performance of LCD screens is significantly affected by the ambient temperature. In low temperature environments, LCD screens may not work properly due to low temperatures, resulting in abnormal display, color distortion, or even failure to light up, seriously affecting the user experience. Traditional solutions such as adding a temperature control system or increasing the backlight power can effectively increase the operating temperature of the LCD screen, but they are often accompanied by high costs and additional energy consumption, which is not conducive to the thinness, long battery life and cost control of the device.

[0054] In summary, in order to ensure the economic benefits of the LCD screen and improve the display performance of the LCD screen in a low temperature environment, the present application provides a display screen heating circuit and a heating method thereof, a display panel and a display device.

[0055] The present application provides a display screen heating circuit. In one embodiment of the present application, refer to Figure 1 As shown, Figure 1 This is a schematic diagram of the overall structure of the display screen heating circuit of the present application, which includes: a liquid crystal screen module 10, wherein a heating film having the same size as the display area of ​​the liquid crystal screen module 10 is disposed on the back of the screen of the liquid crystal screen module 10; a control module 20, wherein the control module 20 is electrically connected to the liquid crystal screen module 10, and the control module 20 is used to obtain the current ambient temperature of the liquid crystal screen module 10, and determine a heating start signal for the heating film according to the current ambient temperature; a backlight driving module 30, wherein the backlight driving module 30 is electrically connected to the control module 20 and the heating film, respectively, and the backlight driving module 30 is used to access the heating start signal sent by the control module 20, and drive the heating film to heat the liquid crystal screen module 10 according to the heating start signal.

[0056] In this embodiment, the present application is provided with a heating film of the same size as the display area of ​​the liquid crystal screen module 10 covering the back of the screen of the liquid crystal screen module 10, so that the heating film can be evenly covered on the back of the screen of the liquid crystal screen module 10, thereby ensuring that when the screen of the liquid crystal screen module 10 needs to be heated, the entire screen of the liquid crystal screen module 10 can be evenly heated, avoiding the display performance degradation or damage caused by excessively high or low local temperature. Next, when the display device using the display screen heating circuit is in the power-on state, according to the electrical connection between the control module 20 and the liquid crystal screen module 10, the control module 20 can obtain the current ambient temperature of the liquid crystal screen module 10 in real time, and can intelligently judge whether it is necessary to start the heating film for heating according to the current ambient temperature. Once it is determined that the screen of the liquid crystal screen module 10 needs to be heated, a heating start signal is immediately output to the backlight driving module 30 to ensure that the liquid crystal screen module 10 can maintain the best working state under various ambient temperatures. Subsequently, based on the electrical connection between the backlight driver module 30 and the control module 20, the backlight driver module 30 can immediately receive the heating start signal sent by the control module 20, and respond to the heating start signal to switch the constant current voltage source provided by the backlight driver module 30 from the backlight module path to the heating path; next, based on the electrical connection between the heating path and the heating film, the constant current voltage source provided by the backlight driver module 30 flows into the heating film via the heating path to provide a stable and reliable constant current voltage source for powering the heating film, thereby ensuring that the heating film maintains a constant power output during the heating process, which not only avoids the problem of unstable heating effect caused by voltage fluctuations, but also avoids the high cost and extra energy consumption brought about by traditional temperature control systems and high backlight power, effectively solves the problems of display abnormalities and color distortion caused by low temperature, and thus significantly improves the working performance of the LCD screen in a low temperature environment.

[0057] Further, in some feasible embodiments, referring to Figure 2 , Figure 2 The figure is a circuit connection diagram of the display screen heating circuit of the present application. The control module 20 includes a temperature detection unit 21, a display driving unit 22 and a control chip unit 23; the temperature detection unit 21 is arranged between the back of the screen and the heating film, the control chip unit 23 is electrically connected to the temperature detection unit 21 and the display driving unit 22 respectively, and the display driving unit 22 is electrically connected to the liquid crystal screen module 10.

[0058] In this embodiment, the temperature detection unit 21 is disposed between the back of the screen and the heating film, so that the temperature detection unit 21 can very accurately obtain the current ambient temperature of the liquid crystal panel module 10 during the display process.

[0059] The temperature detection unit 21 is used to obtain the current ambient temperature of the LCD module 10 and send the current ambient temperature to the control chip unit 23 when the display driving unit 22 receives the display driving signal sent by the control chip unit 23 to drive the LCD module 10 to display.

[0060] In this embodiment, based on the electrical connection between the display driving unit 22 and the control chip unit 23, when the display driving unit 22 drives the LCD module 10 to display under the action of the display driving signal provided by the control chip unit 23, the temperature detection unit 21 starts to work and monitors and records the temperature changes of the LCD module 10 in real time, thereby ensuring that the control chip unit 23 electrically connected to the temperature detection unit 21 can obtain the most real and accurate current ambient temperature, so as to provide accurate and reliable data support for the subsequent temperature intelligent control of the control chip unit 23.

[0061] The control chip unit 23 is used to receive the current ambient temperature sent by the temperature detection unit 21, and determine a heating start signal for the heating film according to the current ambient temperature.

[0062] In this embodiment, based on the electrical connection between the control chip unit 23 and the temperature detection unit 21, after the control chip unit 23 receives the current ambient temperature sent by the temperature detection unit 21, it detects whether the current ambient temperature is lower than the lowest ambient temperature when the LCD module 10 displays normally. If it is detected that the current ambient temperature is lower than the lowest ambient temperature when the LCD module 10 displays normally, the control chip unit 23 is intelligently triggered to immediately send a heating start signal of the heating film to the backlight drive module 30, which not only significantly improves the intelligence level of the control module 20, but also ensures that the LCD module 10 can maintain the best working state under various ambient temperatures, effectively avoiding the display performance degradation or damage caused by low temperature problems.

[0063] Further, in some other feasible embodiments, referring to Figure 3 , Figure 3 This is a circuit diagram of a backlight driving module 30 involved in the display screen heating circuit of the present application. The backlight driving module 30 includes a power supply switching unit 31 and a switch control unit 32; the signal input end of the power supply switching unit 31 is electrically connected to the control module 20, the signal output end of the power supply switching unit 31 is connected to the signal control end of the switch control unit 32, the first passage end of the switch control unit 32 is electrically connected to the liquid crystal screen module 10, and the second passage end of the switch control unit 32 is electrically connected to the heating film.

[0064] In this embodiment, the backlight driving module 30 realizes intelligent power management of the liquid crystal panel module 10 and the heating film by integrating the power supply switching unit 31 and the switch control unit 32. Specifically, when the control module 20 sends a heating start signal to the power supply switching unit 31, the power supply switching unit 31 responds quickly and switches the constant current voltage source provided by the backlight driving module 30 from the backlight module path to the heating path. Next, according to the electrical connection between the heating path and the heating film, the constant current voltage source provided by the backlight driving module 30 flows into the heating film through the heating path to provide a stable and reliable constant current voltage source for the heating film to power it, thereby ensuring that the heating film maintains a constant power output during the heating process, which not only avoids the problem of unstable heating effect caused by voltage fluctuations, but also avoids the high cost and extra energy consumption caused by traditional temperature control systems and high backlight power, effectively solves the problems of display abnormality and color distortion caused by low temperature, and thus significantly improves the working performance of the liquid crystal screen in a low temperature environment.

[0065] It should be noted that the switch control unit 32 includes Figure 3 The low-level conduction switch S1 and the high-level conduction switch S2 are shown. The backlight module path can be understood as the connection link from the signal output end of the power supply switching unit 31 to the closed low-level conduction switch S1 electrically connected to the backlight lamp bead module in the liquid crystal screen module 10; the heating path can be understood as the connection link from the signal output end of the power supply switching unit 31 to the closed high-level conduction switch S2 electrically connected to the heating film. The heating start signal set in this application can be understood as a low-level signal.

[0066] Further, in some feasible embodiments, referring to Figure 3 The power supply switching unit 31 includes a P-type MOS transistor Q1 and an N-type MOS transistor Q2; the gate end of the P-type MOS transistor Q1 is electrically connected to the gate end of the N-type MOS transistor Q2; the connection intersection where the gate end of the P-type MOS transistor Q1 is electrically connected to the gate end of the N-type MOS transistor Q2 constitutes a signal input end of the power supply switching unit 31, which is electrically connected to the control module 20; the source end of the P-type MOS transistor Q1 is electrically connected to the positive power supply end, the source end of the N-type MOS transistor Q2 is electrically connected to the negative power supply end, the drain end of the P-type MOS transistor Q1 is electrically connected to the drain end of the N-type MOS transistor Q2; the connection node where the drain end of the P-type MOS transistor Q1 is electrically connected to the drain end of the N-type MOS transistor Q2 constitutes a signal output end of the power supply switching unit 31, which is electrically connected to the signal control end of the switch control unit 32.

[0067] In this embodiment, refer to Figure 3When the control module 20 sends a heating start signal as a low-level signal to the power supply switching unit 31, the P-type MOS tube Q1 in the power supply switching unit 31 is switched from the cut-off state to the on state under the drive of the low-level signal, thereby pulling the signal output end of the power supply switching unit 31 to the positive power supply end electrically connected to the source end of the P-type MOS tube Q1, so that the signal output end of the power supply switching unit 31 outputs a high-level signal; next, Figure 3 The high-level conduction switch S2 shown is driven by a high-level signal to close the heating path connecting the signal output end of the power supply switching unit 31 to the heating film, so that the constant current voltage source provided by the backlight driving module 30 flows into the heating film through the heating path to provide a stable and reliable constant current voltage source for powering the heating film, thereby ensuring that the heating film maintains a constant power output during the heating process, which not only avoids the problem of unstable heating effect caused by voltage fluctuations, but also avoids the high cost and extra energy consumption brought by traditional temperature control systems and high backlight power, effectively solves the problems of display abnormality and color distortion caused by low temperature, and thus significantly improves the working performance of the LCD screen in a low temperature environment.

[0068] Furthermore, the LCD screen module 10 includes: a liquid crystal driving circuit, a backlight bead module and a liquid crystal display screen; the liquid crystal driving circuit is arranged in a non-display area of ​​the liquid crystal screen module 10, the liquid crystal display screen is arranged in the display area, and the non-display area is surrounded by an edge boundary arranged in the display area; the backlight bead module is arranged in an area on the back of the screen that overlaps with the display area.

[0069] In this example, the LCD screen module 10 is composed of a liquid crystal drive circuit, a backlight bead module and a liquid crystal display screen, which together realize a high-quality display function. The liquid crystal drive circuit is cleverly arranged in the non-display area of ​​the liquid crystal screen module 10. Since the non-display area surrounds and is close to the edge boundary of the display area, it saves space and ensures the effective layout of the circuit. In addition, the liquid crystal display screen occupies the display area and is responsible for directly presenting images or text. The backlight bead module is located on the back of the screen, overlapping with the display area, providing a uniform and sufficient backlight for the liquid crystal display screen, ensuring the clarity and brightness of the displayed image.

[0070] In a specific embodiment, the liquid crystal driving circuit provided in the present application is electrically connected to the display driving unit 22 in the control module 20, and the display driving unit 22 sends the display driving signal provided by the control chip unit 23 to the liquid crystal driving circuit, so that the liquid crystal driving circuit provides a liquid crystal display voltage to power the liquid crystal screen module 10 under the action of the display driving signal, so as to realize the display of the liquid crystal screen module 10.

[0071] In another embodiment, the backlight lamp bead module provided in the present application is Figure 3The low-level conduction switch S1 shown is electrically connected. When the control module 20 sends a heating stop signal as a high-level signal to the power supply switching unit 31, the N-type MOS tube Q2 in the power supply switching unit 31 is switched from the cut-off state to the on state under the drive of the high-level signal, thereby pulling the signal output end of the power supply switching unit 31 down to the negative power supply end electrically connected to the source end of the N-type MOS tube Q2, so that the signal output end of the power supply switching unit 31 outputs a low-level signal; next, Figure 3 The low-level conduction switch S1 shown is driven by a low-level signal to close the backlight module path connecting the signal output end of the power supply switching unit 31 to the backlight lamp bead module, so that the constant current voltage source provided by the backlight driving module 30 supplies power to the backlight lamp bead module, so that the backlight lamp bead module turns on the backlight.

[0072] Based on the above embodiments of the display screen heating circuit, a first embodiment of a heating method for the display screen heating circuit of the present application is proposed. The heating method for the display screen heating circuit is applied to the above display screen heating circuit. Figure 4 , Figure 4 This is a flow chart of an embodiment of a heating method for a display screen heating circuit of the present application. The heating method for a display screen heating circuit includes steps S10 to S20.

[0073] Step S10: obtaining the current ambient temperature of the liquid crystal panel module 10 through the control module 20, and determining a heating start signal of the heating film according to the current ambient temperature.

[0074] In this embodiment, the present application is provided with a heating film of the same size as the display area of ​​the liquid crystal screen module 10 covering the back of the screen of the liquid crystal screen module 10, so that the heating film can be evenly covered on the back of the screen of the liquid crystal screen module 10, thereby ensuring that when the screen of the liquid crystal screen module 10 needs to be heated, the entire screen of the liquid crystal screen module 10 can be evenly heated, avoiding the display performance degradation or damage caused by excessively high or low local temperature. Next, when the display device using the display screen heating circuit is in the power-on state, according to the electrical connection between the control module 20 and the liquid crystal screen module 10, the control module 20 can obtain the current ambient temperature of the liquid crystal screen module 10 in real time, and can intelligently judge whether it is necessary to start the heating film for heating according to the current ambient temperature. Once it is determined that the screen of the liquid crystal screen module 10 needs to be heated, a heating start signal is immediately output to the backlight driving module 30 to ensure that the liquid crystal screen module 10 can maintain the best working state under various ambient temperatures.

[0075] Step S20 : ​​when the backlight driving module 30 receives the heating start signal sent by the control module 20 , the heating film disposed on the back side of the screen of the liquid crystal panel module 10 is driven according to the heating start signal to heat the liquid crystal panel module 10 .

[0076] In this embodiment, according to the electrical connection between the backlight driving module 30 and the control module 20, the backlight driving module 30 can immediately receive the heating start signal sent by the control module 20, and respond to the heating start signal to switch the constant current voltage source provided by the backlight driving module 30 from the backlight module path to the heating path; next, according to the electrical connection between the heating path and the heating film, the constant current voltage source provided by the backlight driving module 30 flows into the heating film via the heating path to provide a stable and reliable constant current voltage source for powering the heating film, thereby ensuring that the heating film maintains a constant power output during the heating process, which not only avoids the problem of unstable heating effect caused by voltage fluctuations, but also avoids the high cost and extra energy consumption brought by traditional temperature control systems and high backlight power, effectively solves the problems of display abnormality and color distortion caused by low temperature, and thus significantly improves the working performance of the LCD screen in a low temperature environment.

[0077] Furthermore, in some feasible embodiments, the above step S20: driving a heating film disposed on the back of the screen of the LCD module 10 to heat the LCD module 10 according to the heating start signal may also include the following implementation steps S201 to S202.

[0078] Step S201: determining whether the current ambient temperature is lower than the lowest ambient temperature of the liquid crystal panel module 10 when the liquid crystal panel module 10 displays normally.

[0079] In this embodiment, by judging whether the current ambient temperature is lower than the lowest ambient temperature when the liquid crystal module 10 displays normally, real-time monitoring and comparative analysis of the ambient temperature are achieved, which provides an important judgment basis for the subsequent operation of driving the heating film to heat.

[0080] Step S202: If the current ambient temperature is greater than or equal to the minimum ambient temperature, the current ambient temperature of the LCD module 10 is continuously acquired through the temperature detection unit 21 until the current ambient temperature is less than the minimum ambient temperature, triggering the control module 20 to send a heating start signal for the heating film to the backlight drive module 30.

[0081] In this embodiment, if the judgment result of step S201 is that the current ambient temperature is greater than or equal to the lowest ambient temperature when the LCD module 10 displays normally, the temperature detection unit 21 will continue to obtain the current ambient temperature of the LCD module 10 and maintain the current real-time monitoring of the ambient temperature. When the ambient temperature drops below the lowest ambient temperature, the display screen heating circuit set in this application will immediately trigger the control module 20 to send a heating start signal of the heating film to the backlight driving module 30, ensuring that the heating film can be quickly started in a low-temperature environment, providing timely heating protection for the LCD module 10, thereby effectively avoiding the display performance degradation or damage caused by too low an ambient temperature.

[0082] Furthermore, in some other feasible embodiments, after the above step S20: driving the heating film disposed on the back of the screen of the LCD module 10 to heat the LCD module 10 according to the heating start signal, the heating method of the display screen heating circuit also includes the following implementation steps A10 to A20.

[0083] Step A10: Continuously obtain the screen heating temperature of the LCD module 10 when the heating film is heating through the temperature detection unit 21, until the screen heating temperature rises to the minimum ambient temperature when the LCD module 10 displays normally, so that the heating film can continuously maintain the screen heating temperature the same as the minimum ambient temperature.

[0084] In this embodiment, the screen heating temperature of the liquid crystal module 10 during the heating process of the heating film is continuously monitored by the temperature detection unit 21, thereby ensuring that the heating film can accurately heat the screen to the lowest ambient temperature when the liquid crystal module 10 displays normally. When the screen heating temperature reaches the lowest ambient temperature, the display screen heating circuit provided in the present application enables the heating film to continuously maintain the screen heating temperature to be the same as the lowest ambient temperature, which not only ensures that the liquid crystal module 10 can work stably within a suitable temperature range, but also avoids energy waste and potential damage caused by overheating.

[0085] Step A20: When the average operating temperature of the liquid crystal driving circuit reaches the minimum ambient temperature, the heating film is enabled to stop heating the liquid crystal screen module 10 under the driving of the heating stop signal of the control module 20 .

[0086] In this embodiment, when the heating film continuously maintains the screen heating temperature to be the same as the minimum ambient temperature, the operating driving temperature of the liquid crystal driving circuit is obtained according to a preset sampling frequency, and the operating temperature average of the liquid crystal driving circuit is calculated based on multiple operating driving temperatures, until the operating temperature average reaches the minimum ambient temperature when the liquid crystal screen module 10 displays normally, the heating film is enabled to stop heating the liquid crystal screen module 10 under the drive of the heating stop signal of the control module 20, that is, the operating performance of the liquid crystal screen in a low temperature environment is realized through the operating temperature average of the liquid crystal driving circuit.

[0087] In summary, in a low-temperature environment, although the terminal equipment (such as a display device) can rely on the slight heat generated by the LCD backlight circuit, the drive circuit and other circuits to maintain the normal display temperature of the LCD screen, after low-temperature storage, the temperature of the LCD screen drops sharply, and it is difficult to quickly restore the display function by the heat generated by these circuits alone, resulting in a long heating process and abnormal display of the LCD screen during this period, affecting the normal operation of the device. The present application only provides a layer of low-cost heating film on the back of the screen of the LCD module 10, and uses the original backlight drive module 30 to drive the heating film to heat the LCD module 10, which not only avoids the high cost and extra energy consumption brought by the traditional temperature control system and high backlight power, but also effectively solves the problems of display abnormality and color distortion caused by low temperature, thereby significantly improving the working performance of the LCD screen in a low-temperature environment.

[0088] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the heating method of the display screen heating circuit of the present application. More simple transformations based on this technical concept are all within the protection scope of the present application.

[0089] In addition, the present application also provides a display panel, which includes any one of the above display screen heating circuits.

[0090] In addition, the present application also provides a display device. Figure 5 , Figure 5 The structure diagram of the display device involved in the embodiment of the present application is shown in FIG. The display device in the embodiment of the present application may be a device for locally running a heating program of a display screen heating circuit.

[0091] The present application provides a display device, which includes: at least one processor; and a memory connected to the at least one processor in communication; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the heating method of the display screen heating circuit in the above-mentioned embodiment 1.

[0092] Reference below Figure 5, which shows a schematic diagram of the structure of a display device suitable for implementing the embodiment of the present application. The display device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 5 The display device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0093] like Figure 5 As shown, the display device may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the display device are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input system 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the display device to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows a display device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or have alternatively.

[0094] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0095] The display device provided by the present application adopts the heating method of the display screen heating circuit in the above embodiment, and can solve the problem of performance degradation of the liquid crystal screen due to low temperature in a cold environment while ensuring the economic efficiency of the liquid crystal screen. Compared with the prior art, the beneficial effects of the display device provided by the present application are the same as the beneficial effects of the heating method of the display screen heating circuit provided by the above embodiment, and other technical features in the display device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0096] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0097] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0098] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the heating method of the display screen heating circuit in the above-mentioned embodiment.

[0099] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0100] The computer-readable storage medium may be included in the display device; or may exist independently without being assembled into the display device.

[0101] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the display device, the display device:

[0102] Acquiring the current ambient temperature of the LCD module through the control module, and determining a heating start signal of the heating film according to the current ambient temperature;

[0103] When the backlight driving module receives the heating start signal sent by the control module, the heating film arranged on the back side of the screen of the liquid crystal module is driven according to the heating start signal to heat the liquid crystal module.

[0104] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0105] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0106] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0107] The readable storage medium provided by the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the heating method of the display screen heating circuit, and can solve the technical problem that the computer power on / off control is not intelligent enough. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present application are the same as the beneficial effects of the heating method of the display screen heating circuit provided by the above-mentioned embodiment, and will not be elaborated here.

[0108] The present application also provides a computer program product, including a computer program, wherein when the computer program is executed by a processor, the steps of the heating method of the display screen heating circuit as described above are implemented.

[0109] The computer program product provided by the present application can solve the technical problem that the computer power on / off control is not intelligent enough. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the heating method of the display screen heating circuit provided by the above embodiment, which will not be described in detail here.

[0110] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A display screen heating circuit, characterized in that: The display screen heating circuit comprises: A liquid crystal screen module, wherein a heating film having the same size as the display area of ​​the liquid crystal screen module is arranged on the back of the screen of the liquid crystal screen module; A control module, the control module is electrically connected to the liquid crystal module, and the control module is used to obtain the current ambient temperature of the liquid crystal module and determine a heating start signal of the heating film according to the current ambient temperature; A backlight driving module is electrically connected to the control module and the heating film respectively, and is used to receive a heating start signal sent by the control module, and drive the heating film to heat the liquid crystal screen module according to the heating start signal.

2. The display screen heating circuit according to claim 1, characterized in that: The control module includes a temperature detection unit, a display driving unit and a control chip unit; The temperature detection unit is arranged between the back of the screen and the heating film, the control chip unit is electrically connected to the temperature detection unit and the display driving unit respectively, and the display driving unit is electrically connected to the liquid crystal screen module; The temperature detection unit is used to obtain the current ambient temperature of the LCD module when the display driving unit receives the display driving signal sent by the control chip unit to drive the LCD module to display, and send the current ambient temperature to the control chip unit; The control chip unit is used to receive the current ambient temperature sent by the temperature detection unit, and determine a heating start signal for the heating film according to the current ambient temperature.

3. The display screen heating circuit according to claim 1, characterized in that: The backlight driving module includes a power supply switching unit and a switch control unit; The signal input end of the power supply switching unit is electrically connected to the control module, the signal output end of the power supply switching unit is connected to the signal control end of the switch control unit, the first passage end of the switch control unit is electrically connected to the liquid crystal screen module, and the second passage end of the switch control unit is electrically connected to the heating film.

4. The display screen heating circuit according to claim 3, characterized in that: The power supply switching unit includes a P-type MOS tube and an N-type MOS tube; The gate terminal of the P-type MOS tube is electrically connected to the gate terminal of the N-type MOS tube; The connection intersection where the gate end of the P-type MOS tube is electrically connected to the gate end of the N-type MOS tube constitutes the signal input end of the power supply switching unit, and is electrically connected to the control module; The source terminal of the P-type MOS tube is electrically connected to the positive power supply terminal, the source terminal of the N-type MOS tube is electrically connected to the negative power supply terminal, and the drain terminal of the P-type MOS tube is electrically connected to the drain terminal of the N-type MOS tube; A connection node where the drain end of the P-type MOS tube is electrically connected to the drain end of the N-type MOS tube constitutes a signal output end of the power supply switching unit, and is electrically connected to a signal control end of a switch control unit.

5. The display screen heating circuit according to claim 1, characterized in that: The liquid crystal screen module comprises: a liquid crystal drive circuit, a backlight lamp bead module and a liquid crystal display screen; The liquid crystal driving circuit is arranged in the non-display area of ​​the liquid crystal screen module, the liquid crystal display screen is arranged in the display area, and the non-display area surrounds the edge boundary of the display area; The backlight lamp bead module is arranged at an area on the back of the screen that overlaps with the display area.

6. A heating method for a display screen heating circuit, characterized in that: The heating method of the display screen heating circuit is applied to the display screen heating circuit of claim 1, and the heating method of the display screen heating circuit comprises: Acquiring the current ambient temperature of the LCD module through the control module, and determining a heating start signal of the heating film according to the current ambient temperature; When the backlight driving module receives the heating start signal sent by the control module, the heating film arranged on the back side of the screen of the liquid crystal module is driven according to the heating start signal to heat the liquid crystal module.

7. The heating method of the display screen heating circuit according to claim 6, characterized in that: The step of determining the heating start signal of the heating film according to the current ambient temperature includes: Determine whether the current ambient temperature is lower than the lowest ambient temperature when the LCD module displays normally; If the current ambient temperature is greater than or equal to the minimum ambient temperature, the temperature detection unit continuously obtains the current ambient temperature of the LCD module until the current ambient temperature is less than the minimum ambient temperature, triggering the control module to send a heating start signal for the heating film to the backlight drive module.

8. The heating method of the display screen heating circuit according to claim 6, characterized in that: After the step of driving the heating film disposed on the back of the LCD module screen to heat the LCD module according to the heating start signal, the heating method further includes: The screen heating temperature of the liquid crystal module when the heating film is heating is continuously obtained by the temperature detection unit until the screen heating temperature rises to the lowest ambient temperature when the liquid crystal module displays normally, so that the heating film can continuously maintain the screen heating temperature to be the same as the lowest ambient temperature; When the average operating temperature of the liquid crystal driving circuit reaches the minimum ambient temperature, the heating film is enabled to stop heating the liquid crystal screen module under the driving of the heating stop signal of the control module.

9. A display panel, characterized in that: The display panel comprises the display screen heating circuit according to any one of claims 1 to 6.

10. A display device, characterized in that: The display device comprises the display panel according to claim 9; or, The display device includes a processor, a memory, and a heating program of a display screen heating circuit stored in the memory and executable by the processor, wherein when the heating program of the display screen heating circuit is executed by the processor, the steps of the heating method of the display screen heating circuit as described in any one of claims 7 to 8 are implemented.

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