Display device, vehicle and driving method

Abstract

The invention discloses a display device, a vehicle and a driving method, and relates to the technical field of backlight driving. The display device comprises a target backlight driving module, a backlight source module and a temperature sensing element, the temperature sensing element is positioned on the backlight source module; the target backlight driving module is connected with the backlight source module and the temperature sensing element. The target backlight driving module is used for detecting the current temperature of the temperature sensing element; and adjusting the brightness of the backlight module based on a preset temperature control strategy, the current temperature and the initial numerical value of the preset control parameter. By means of the display device, real-time temperature monitoring and effective temperature control can be conducted on the backlight source module, and the stability and reliability of the liquid crystal display module can be improved.

Description

Technical Field

[0001] The present application relates to the field of backlight driving technology, and in particular to a display device, a vehicle, and a driving method. Background Art

[0002] The backlight module is a core component of the LCD display module, providing uniform light for clear image display. However, the backlight module generates heat during operation. Once the actual operating temperature of the backlight module exceeds the normal operating temperature range, it can lead to problems such as decreased display brightness and aging of the backlight module's internal materials. Therefore, to ensure the stability and reliability of the LCD display module, real-time temperature monitoring and effective temperature control of the backlight module are crucial. Summary of the Invention

[0003] Based on the above problems, the present application provides a display device that can perform real-time temperature monitoring and effective temperature control on the backlight module, thereby improving the stability and reliability of the liquid crystal display module.

[0004] The embodiments of this application disclose the following technical solutions:

[0005] The first aspect of the present application discloses a display device, comprising a target backlight driving module, a backlight module, and a temperature sensing element; the temperature sensing element is located on the backlight module; the target backlight driving module is connected to the backlight module and the temperature sensing element respectively;

[0006] The target backlight driver module is used to detect the current temperature of the temperature sensing element; based on the preset temperature control strategy, the current temperature and the initial values ​​of the preset control parameters, the brightness of the backlight module is adjusted; the control parameters include the reference current and the reference duty cycle; the temperature control strategy includes the correspondence between the temperature range and the brightness adjustment method of the backlight module.

[0007] A second aspect of the present application discloses a vehicle, comprising the display device of the first aspect.

[0008] The third aspect of the present application discloses a driving method for a display device, which is applied to the display device of the first aspect. Through the target backlight driving module, the current temperature of the temperature sensing element is obtained, and the brightness of the backlight module is adjusted based on the preset temperature control strategy, the current temperature and the initial values ​​of the preset control parameters; the control parameters include a reference current and a reference duty cycle; the temperature control strategy includes the correspondence between the temperature range and the brightness adjustment method of the backlight module.

[0009] Compared with the existing technology, this application has the following beneficial effects:

[0010] In the display device disclosed in the present application, a temperature sensing element is located on the backlight module, which can detect the current temperature of the backlight module in real time; a target backlight driver module is connected to the temperature sensing element, and the target backlight driver module can obtain the current temperature of the backlight module; the target backlight driver module is also connected to the backlight module, and the target backlight driver module can adjust the brightness of the backlight module based on a preset temperature control strategy, the current temperature, and the initial value of the preset control parameter. Therefore, the display device disclosed in the present application can perform real-time temperature monitoring and effective temperature control on the backlight module, which can improve the stability and reliability of the liquid crystal display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0012] Figure 1 A schematic structural diagram of a conventional display device provided in an embodiment of the present application;

[0013] Figure 2 A schematic structural diagram of another conventional display device provided in an embodiment of the present application;

[0014] Figure 3 A schematic structural diagram of a target display device provided in an embodiment of the present application;

[0015] Figure 4 A schematic structural diagram of another target display device provided in an embodiment of the present application;

[0016] Figure 5 A schematic structural diagram of a target backlight driving module provided in an embodiment of the present application;

[0017] Figure 6 A schematic structural diagram of another target backlight driving module provided in an embodiment of the present application;

[0018] Figure 7 A schematic structural diagram of another target backlight driving module provided in an embodiment of the present application;

[0019] Figure 8 A temperature sensing element interface circuit diagram provided in an embodiment of the present application;

[0020] Figure 9 Another temperature sensing element interface circuit diagram provided in an embodiment of the present application;

[0021] Figure 10A schematic diagram comparing the effects of a display device provided in an embodiment of the present application;

[0022] Figure 11 A schematic diagram illustrating the connection relationship between the front and back components of a target backlight module provided in an embodiment of the present application;

[0023] Figure 12 This is a flowchart of a method for driving a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to help those skilled in the art better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0025] First, the technical terms involved in this application are explained.

[0026] LED driver IC (LED Driver Integrated Circuit) is an electronic component used to drive light-emitting diodes. It is mainly used to control the current and voltage of the LED to ensure that the LED can operate stably and efficiently.

[0027] Panel driver IC (Panel Driver Integrated Circuit) is an electronic device used to control the display panel. Its main function is to receive video data from the system controller and convert it into a signal that can drive each pixel on the display panel.

[0028] A TCON (Timing Controller) is an integrated circuit chip whose main function is to control the timing of various signals, ensuring that the signals arrive at the specified location at the correct time. It achieves system synchronization and stable operation by precisely managing clock signals, data signals, and other control signals.

[0029] As mentioned earlier, backlight modules generate heat during operation. Once the actual operating temperature of a backlight module exceeds its normal operating range, numerous issues can arise, including decreased display brightness and aging of internal materials. Therefore, to ensure the stability and reliability of LCD display modules, real-time temperature monitoring and effective temperature control of the backlight module are crucial.

[0030] Currently commonly used Figure 1 and Figure 2 The conventional display device shown in performs temperature monitoring and temperature control on the backlight module.

[0031] Figure 1 A schematic structural diagram of a conventional display device provided in an embodiment of the present application. Figure 1 The traditional display device in the industry includes two parts: a liquid crystal display module and a client system. The client system is a user device or application that interacts with the display system. The liquid crystal display module is responsible for converting the received display data into visual images or text information and displaying it.

[0032] Figure 1 The customer system includes the control system and LED driver IC (also known as backlight driver module); the LCD display module includes the Panel driver IC, temperature sensor, backlight module and LCD panel. Figure 1 The panel driver IC is connected to the liquid crystal display panel and the control system respectively; the LED driver IC is connected to the backlight module and the control system respectively; and the temperature sensing element is connected to the control system. Figure 1 The red dashed line in the figure represents the temperature control loop. Figure 1 From the temperature control loop in the system, it can be seen that after the temperature sensing element detects the current temperature of the backlight module, it transmits the current temperature to the control system in the customer system; based on the current temperature, the control system controls the operation of the LED driver IC, thereby adjusting the operating temperature of the backlight module.

[0033] Figure 2 A schematic structural diagram of another traditional display device provided in an embodiment of the present application. Figure 2 The traditional display device includes two parts: liquid crystal display module and customer system; the function reference of customer system and liquid crystal display module Figure 1 The introduction of the relevant text in the text will not be repeated here.

[0034] Figure 2 The customer system includes the control system; the LCD display module includes TCON, Panel driver IC, LED driver IC, temperature sensor, backlight module and LCD panel.

[0035] Figure 2 The panel driver IC is connected to the liquid crystal display panel and TCON respectively; the LED driver IC is connected to the backlight module and TCON respectively; the TCON is connected to the panel driver IC, LED driver IC and control system respectively; the temperature sensor is connected to the control system. Figure 1 The red dashed line in the figure shows the temperature control loop. Figure 2From the temperature control loop in the figure, it can be seen that after the temperature sensing element detects the current temperature of the backlight module, it transmits the current temperature to the control system in the customer system. Based on the current temperature, the control system controls the operation of the LED driver IC through TCON, thereby adjusting the operating temperature of the backlight module.

[0036] After research, the inventors of this application found that in the process of real-time temperature monitoring and temperature control of the backlight module in a traditional display device, the current temperature of the temperature sensing element on the backlight is detected by the control system, and the brightness of the backlight module is adjusted according to the detected current temperature; since the temperature detection of the temperature sensing element and the brightness adjustment of the backlight module are both achieved through the control system, there is a problem of occupying the hardware resources of the microcontroller unit process in the control system.

[0037] Based on the above problems, the present application discloses a display device (referred to as a target display device in subsequent embodiments of the present application). The target display device includes a target backlight driver module, a backlight source module and a temperature sensing element; the temperature sensing element is located on the backlight source module; the target backlight driver module is connected to the backlight source module and the temperature sensing element, respectively; wherein, the target backlight driver module is used to detect the current temperature of the temperature sensing element; based on a preset temperature control strategy, the current temperature and the initial value of a preset control parameter, the brightness of the backlight source module is adjusted; the control parameters include a reference current and a reference duty cycle; the temperature control strategy includes a correspondence between a temperature range and a brightness adjustment method of the backlight source module.

[0038] It should be noted that the preset temperature control strategy and the preset initial values ​​of the control parameters (the initial value of the reference current and the initial value of the reference duty cycle) in this application are set through a control system, an external resistor, or a hardware control pin. The subsequent embodiments of this application will provide a detailed description of the setting method of the temperature control strategy and the initial values ​​of the control parameters in conjunction with the accompanying drawings.

[0039] Figure 3 A schematic structural diagram of a target display device provided in an embodiment of the present application. Figure 3 The target display device in the example consists of two parts: the LCD module and the client system. The functional reference of the client system and the LCD module is as follows: Figure 1 The introduction of the relevant text in the text will not be repeated here.

[0040] Figure 3 The customer system includes the control system and LED driver IC; the LCD display module includes the panel driver IC, temperature sensor, backlight module and LCD panel.

[0041] Figure 3The temperature sensing element is mounted on the backlight module. For example, the temperature sensing element can be soldered on a light board PCB (Printed Circuit Board) or FPC (Flexible Printed Circuit) next to the LED of the backlight module.

[0042] Figure 3 The panel driver IC is connected to the liquid crystal display panel and the control system respectively; the LED driver IC is connected to the backlight module, the temperature sensor and the control system respectively.

[0043] Figure 3 The red dashed line in the figure shows the temperature control loop. Figure 3 From the temperature control loop in the figure, it can be seen that after the temperature sensing element detects the current temperature of the backlight module, it transmits the current temperature to the LED driver IC in the customer system (i.e., the target backlight driver module). The target backlight driver module adjusts the brightness of the backlight module based on the preset temperature control strategy, the current temperature, and the initial values ​​of the preset control parameters.

[0044] Figure 4 A schematic structural diagram of another target display device provided in an embodiment of the present application. Figure 4 The target display device in the system consists of two parts: the LCD module and the client system; the functional reference of the client system and the LCD module Figure 1 The introduction of the relevant text in the text will not be repeated here.

[0045] Figure 4 The customer system includes the control system; the LCD display module includes TCON, Panel driver IC, LED driver IC, temperature sensor, backlight module and LCD panel.

[0046] Figure 4 The temperature sensing element is mounted on the backlight module. For example, the temperature sensing element can be soldered on the light board PCB or FPC next to the LED of the backlight module.

[0047] Figure 4 The Panel driver IC is connected to the LCD panel and TCON respectively; the LED driver IC is connected to the backlight module, temperature sensor and TCON respectively; the TCON is connected to the Panel driver IC, LED driver IC and control system respectively.

[0048] Figure 4 The red dashed line in the figure shows the temperature control loop. Figure 4From the temperature control loop in the figure, it can be seen that after the temperature sensing element detects the current temperature of the backlight module, it transmits the current temperature to the LED driver IC in the customer system (i.e., the target backlight driver module). The target backlight driver module adjusts the brightness of the backlight module based on the preset temperature control strategy, the current temperature, and the initial values ​​of the preset control parameters.

[0049] Combine Figure 3 and Figure 4 It can be seen that the temperature sensing element in the target display device disclosed in the present application is located on the backlight module, and can detect the current temperature of the backlight module in real time; the target backlight driving module is connected to the temperature sensing element, and the target backlight driving module can obtain the current temperature of the backlight module; the target backlight driving module is also connected to the backlight module, and the target backlight driving module can adjust the brightness of the backlight module based on the preset temperature control strategy, the current temperature and the initial value of the preset control parameter. Compared with the traditional display device, the target display device disclosed in the present application uses the target backlight driving module to replace the control system, to achieve real-time monitoring of the current temperature of the temperature sensing element and brightness adjustment of the backlight module, and solves the problem of occupying the hardware resources of the microcontroller unit process in the control system in the traditional solution; the target display device can perform real-time temperature monitoring and effective temperature control on the backlight module, which can improve the stability and reliability of the liquid crystal display module.

[0050] It is understandable that the target display device can solve the problem of occupying hardware resources of the microcontroller unit process in the control system in traditional display devices because the target display device includes a target backlight driver module. The structure of the target backlight driver module is described in detail below.

[0051] Figure 5 A schematic structural diagram of a target backlight driving module provided in an embodiment of the present application. Figure 5 In addition to the target controller, current value buffer, duty cycle buffer, current generator, duty cycle generator, timing generator and LED drive channel electronic components in the LED driver IC in the traditional target display device, the target backlight driver module also adds a temperature sensing element detection channel and a temperature sensing control unit; wherein the temperature sensing element detection channel is respectively connected to the temperature sensing control unit and the temperature sensing element; the temperature sensing control unit is respectively connected to the temperature sensing detection channel, the current value buffer and the duty cycle buffer.

[0052] Figure 5 The temperature sensing element detection channel is used to detect the current temperature of the temperature sensing element and transmit the detected current temperature to the temperature sensing control unit; the temperature sensing control unit is used to store the temperature control strategy and the current temperature, and adjust the brightness of the backlight module based on the current temperature, the temperature control strategy and the initial value of the control parameter.

[0053] It should be emphasized that Figure 5 The positional relationship between the temperature sensing element and the backlight module is not shown; in actual use, Figure 5 The temperature sensing element is installed on the backlight module.

[0054] It should be noted that Figure 5 The target controller, based on the control system's instructions, performs the following functions: provides an initial reference current value to the current value register, provides an initial reference duty cycle value to the duty cycle register, and sets a preset temperature control strategy for the temperature sensing control unit. The target controller can be a logic controller, a serial port controller, or a combination of a logic controller and a serial port controller.

[0055] It should be noted that Figure 5 The specific connection relationship between the target controller and the current value buffer is not shown, nor is the specific connection relationship between the target controller and the duty cycle buffer.

[0056] Figure 6 This is a schematic diagram of the structure of another target backlight driving module provided in the embodiment of the present application. Figure 6 , introduces the specific structure of the temperature sensing control unit in the target display device. Figure 6 In the example, serial port controller 1 is used as Figure 5 The target controller in FIG. 1 is shown, and specifically shows the connection relationship between the serial port controller 1 and the current value buffer, and the connection relationship between the serial port controller 1 and the duty cycle buffer. Figure 6 The temperature sensing control unit in the target display device shown in the figure is composed of a temperature sensing detection circuit subunit and a temperature sensing logic control subunit.

[0057] The temperature sensing logic control subunit is composed of a temperature sensing logic controller, a threshold register, a detection value buffer, a target current value register, a target duty cycle register, a first operator and a second operator.

[0058] The temperature sensing circuit subunit is used to receive the current temperature transmitted by the temperature sensing element detection channel; convert the analog value of the current temperature into a corresponding digital value; and transmit the digital value to the temperature sensing logic control subunit.

[0059] The temperature sensing logic control subunit is used to store digital values ​​and temperature control strategies; based on the digital values, temperature control strategies and initial values ​​of the control parameters, the brightness of the backlight module is adjusted.

[0060] It should be noted that Figure 6 The current value register, duty cycle register, serial port controller 1, current generator, duty cycle generator, timing generator and LED driving channel are electronic components already included in the LED driving IC included in the traditional display device; Figure 6 The timing generator in can control the PWM timing and the timing of the LED drive channel; the connection relationship and specific functions of the above-mentioned existing electronic components are not described in detail in this application.

[0061] Combine Figure 6 As shown, the temperature sensing logic controller is respectively connected to the threshold register, the detection value register, the target current value register, the target duty cycle register, the first operator, the second operator and the temperature sensing detection circuit subunit; the first operator is respectively connected to the current value register, the target current value register and the temperature sensing logic controller; the second operator is respectively connected to the duty cycle register, the target duty cycle register and the temperature sensing logic controller; the detection value register is respectively connected to the temperature sensing logic controller and the temperature sensing detection circuit subunit.

[0062] Figure 6 The functions of the electronic components included in the medium temperature sensing logic control subunit are:

[0063] The threshold register is used to store the temperature threshold corresponding to each temperature range in the temperature control strategy;

[0064] A detection value buffer, used to store the digital value of the current temperature of the detected temperature sensing element;

[0065] A temperature sensing logic controller is used to store the temperature control strategy and control the operating mode of the temperature sensing detection circuit subunit; based on the temperature threshold, the digital value of the current temperature, and the temperature control strategy, it determines the target adjustment mode and the compensation value corresponding to the target adjustment mode; the compensation value includes the current compensation value and / or the duty cycle compensation value; the target adjustment mode refers to the method for adjusting the brightness of the backlight module;

[0066] Among them, the target adjustment method is one of the first adjustment method, the second adjustment method and the third adjustment method; the first adjustment method is a method of adjusting the brightness of the backlight source module based on the target current value; the second adjustment method is a method of adjusting the brightness of the backlight source module based on the target duty cycle value; the third adjustment method is a method of adjusting the brightness of the backlight source module based on the target current value and the target duty cycle value.

[0067] A target current value register, used to store a current compensation value;

[0068] A target duty cycle register for storing a duty cycle compensation value;

[0069] a first operator, configured to determine a target current value based on an initial value of the reference current and a current compensation value; the target current value being used to adjust the brightness of the backlight module;

[0070] The second operator is used to determine a target duty cycle value based on an initial value of the reference duty cycle value and a duty cycle compensation value; the target duty cycle value is used to adjust the brightness of the backlight module.

[0071] The preset control parameters in this application include the reference current and the reference duty cycle. The initial value of the reference current is stored in Figure 6 The initial value of the reference duty cycle is stored in the current value register in Figure 6 In the duty cycle register.

[0072] Before using the target display device, the preset temperature control strategy can be loaded into the temperature sensing logic controller in the target backlight driver module; the temperature threshold corresponding to each temperature range in the temperature control strategy can be loaded into the threshold register in the target backlight driver module; the initial value of the reference current in the preset control parameters can be loaded into the current value register; and the initial value of the reference duty cycle in the preset control parameters can be loaded into the duty cycle register.

[0073] Among them, the preset temperature control strategy includes the correspondence between the temperature range and the brightness adjustment method of the backlight module. For example, in the temperature range of [A1, A2], the first adjustment method is adopted, that is, the brightness of the backlight module is adjusted based on the target current value; in the temperature range of [A3, A4], the second adjustment method is adopted, that is, the brightness of the backlight module is adjusted based on the target duty cycle value; in the temperature range of [A5, A6], the third adjustment method is adopted, that is, the brightness of the backlight module is adjusted based on the target current value and the target duty cycle value. Those skilled in the art can set the values ​​of A1, A2, A3, A4, A5 and A1 according to actual work needs.

[0074] After the target display device is activated, the temperature sensing element installed on the backlight module is detected through the temperature sensing device detection channel to obtain the current temperature of the temperature sensing element, and the current temperature is sent to the temperature sensing detection circuit subunit; after receiving the current temperature, the temperature sensing detection circuit subunit converts the analog value of the current temperature into a corresponding digital value and transmits it to the detection value buffer; the detection value buffer stores the digital value of the current temperature. Among them, the temperature sensing logic controller can control the specific processing method of the temperature sensing detection circuit subunit for the detected current temperature; the specific structure of the temperature sensing detection circuit subunit is not limited in this application, and it is only limited to the temperature sensing detection circuit subunit for converting the analog value of the current temperature of the temperature sensing element into a corresponding digital value.

[0075] Next, the temperature sensing logic controller compares the temperature threshold stored in the threshold register with the digital value of the current temperature stored in the detection value buffer, and based on the preset temperature control strategy, determines the target adjustment method for adjusting the brightness of the backlight module and the compensation value corresponding to the target adjustment method.

[0076] It is understood that if the target regulation mode is the first regulation mode, the compensation value corresponding to the first regulation mode is the current compensation value; if the target regulation mode is the second regulation mode, the compensation value corresponding to the second regulation mode is the duty cycle compensation value; if the target regulation mode is the third regulation mode, the compensation values ​​corresponding to the third regulation mode are the current compensation value and the duty cycle compensation value. The current compensation value is stored in the target current value register; the duty cycle compensation value is stored in the target duty cycle register.

[0077] Next, the operator corresponding to the target adjustment mode is called to obtain the target current value and / or the target duty cycle value.

[0078] For example, if the target adjustment mode is the first adjustment mode, the first operator is called; the initial value of the reference current in the current value register and the current compensation value in the target current value register are processed by the first operator to obtain the target current value; the target current value is then sent to the current value buffer; the current generator generates a current for driving the backlight module based on the target current value.

[0079] For another example, if the target adjustment mode is the second adjustment mode, the second operator is called; the initial value of the reference duty cycle in the duty cycle register and the duty cycle compensation value in the target duty cycle register are processed by the second operator to obtain a target duty cycle value; the target duty cycle value is sent to the duty cycle buffer; and the duty cycle generator generates a PWM duty cycle for driving the backlight module based on the target duty cycle value.

[0080] For another example, if the target adjustment method is the third adjustment method, the first operator and the second operator are called; the initial value of the reference current in the current value register and the current compensation value in the target current value register are processed by the first operator to obtain the target current value, and the target current value is sent to the current value buffer; the initial value of the reference duty cycle in the duty cycle register and the duty cycle compensation value in the target duty cycle register are processed by the second operator to obtain the target duty cycle value; the target duty cycle value is sent to the duty cycle buffer; and the brightness of the backlight module is adjusted according to the target current value and the target duty cycle value.

[0081] It should be noted that the first operator and the second operator in this application can be multipliers or adders; this application does not limit the types of the first operator and the second operator. The first operator and the second operator store the values ​​obtained after the operation in corresponding buffers, and then generate the current and / or duty cycle for driving the backlight module through the current generator and / or duty cycle generator, thereby achieving autonomous adjustment of the brightness of the backlight module.

[0082] It should be noted that the temperature sensing detection circuit sub-unit in the temperature sensing control unit in the target backlight driving module in the present application is a functional unit composed of circuits such as an analog signal front end, which performs digital processing on the input analog signal; the specific structure of the temperature sensing detection circuit sub-unit is not limited in the present application.

[0083] The following describes how to set the temperature control strategy and the initial values ​​of the control parameters with reference to specific diagrams.

[0084] In an optional implementation, the temperature threshold in the threshold register, the temperature control strategy in the temperature sensing logic controller, the initial value of the reference current stored in the current value register, and the initial value of the reference duty cycle stored in the duty cycle register can be set through the control system and the serial port controller 1. Figure 6 The left side of the double-headed arrow numbered ① is the control system; Figure 6 The right side of the one-way arrow numbered ② in the figure is the temperature sensing element; Figure 6 The backlight module is on the right side of the one-way arrow numbered ③ in FIG. Figure 6 The control system, temperature sensing element and backlight module are not shown.

[0085] In another optional implementation method, the temperature threshold in the threshold register and the temperature control strategy in the temperature sensing logic controller can be set through the control system and the serial port controller 2; the initial value of the reference current stored in the current value register can be set through the external resistor and the analog detector; and the initial value of the reference duty cycle stored in the duty cycle register can be set through the hardware control pin and the logic controller 1.

[0086] It should be noted that Figure 7 The left side of the double-headed arrow numbered ① is the control system; Figure 7 The right side of the one-way arrow numbered ② in the figure is the temperature sensing element; Figure 7 The backlight module is on the right side of the one-way arrow numbered ③ in FIG. Figure 7 The left side of the double-headed arrow numbered ④ is the external resistor; Figure 7 On the left side of the double-headed arrow with sequence number ⑤. Figure 7 The control system, external resistors, hardware control pins, temperature sensing elements and backlight module are not shown.

[0087] It should be noted that Figure 7 The specific structure of the temperature sensing logic control subunit of the target backlight driver module shown in Figure 6 Exactly the same, Figure 7 and Figure 6 The only difference is the way of setting the preset temperature control strategy and the initial values ​​of the preset control parameters. Figure 7 For the connection relationship and specific functions of various components such as temperature sensing logic controller and temperature sensing detection circuit subunit, see Figure 6 The introduction of relevant content will not be repeated here.

[0088] Figure 8 This is a temperature sensing element interface circuit diagram provided in an embodiment of the present application. Figure 8 As shown, the target backlight driver module can be provided with multiple pins for external temperature control elements; Figure 8 In other words, the present application does not limit the number of pins of the target backlight driver module connected to the temperature sensing element, and the target backlight driver module in the present application can detect one or more identical or different temperature sensing elements.

[0089] Figure 9 Another temperature sensing element interface circuit diagram provided in an embodiment of the present application. Figure 9 The temperature sensing element connected to the target backlight driver module shown in (a) is an NTC (Negative Temperature Coefficient Thermistor). Figure 9 The temperature sensing element connected to the target backlight driving module shown in (b) is a diode. The temperature sensing element in this application can be an NTC or a diode.

[0090] Figure 10 A schematic diagram comparing the effects of a display device provided in an embodiment of the present application. Figure 10 (a) shows the connection between the NTC in the backlight module of a traditional display device and the digital-to-analog converter of the assembly control board; Figure 10 (b) shows that the NTC in the target backlight module of this application is connected to the LED driver IC (target backlight driver module) in the backlight module. Figure 10 The circuit structure of (a) and Figure 10 By comparing the circuit structure of (b) in FIG. 1 , it can be concluded that the target display device disclosed in this application has the following advantages:

[0091] First, the target display device disclosed in the present application uses an LED driver IC (i.e., a target backlight driver module) to independently adjust the brightness of the backlight module (changing the brightness of the backlight module with temperature) without the participation of other electronic components, which significantly reduces the process occupancy of the controller unit compared to traditional display devices.

[0092] Second, the target display device disclosed in the present application performs the entire process from detecting the current temperature of the NTC to adjusting the brightness of the backlight module based on the current temperature of the NTC, all of which are independently completed by the LED driver IC (target backlight driver module). Compared with the traditional solution in which, after detecting the current temperature of the NTC, it needs to be transmitted to the digital-to-analog converter, and then transmitted to the microcontroller unit via the digital-to-analog converter, and then processed by the microcontroller unit and fed back to the LED driver IC for execution, the structure of the temperature control loop of the target display device disclosed in the present application is simpler and more stable.

[0093] Third, since the temperature control loop in this application does not require the participation of a digital-to-analog converter and a microcontroller unit, the cost of peripheral devices in the digital-to-analog converter or the microcontroller unit may be reduced in certain applications. Those skilled in the art only need to operate and configure the LED driver IC (target backlight driver module) to complete the task of detecting the current temperature of the NTC and controlling the brightness of the backlight source module.

[0094] Figure 11 A schematic diagram of the connection relationship between the front and back components of a target backlight module provided in an embodiment of the present application. Figure 11 The diagram of the back and front of the light board of the target backlight module is shown in FIG. Figure 11 It can be seen that since the LED driver IC (target backlight driver module) and the NTC (temperature sensor) are on the same lamp board, the target display device disclosed in this application can make the connection line between the LED driver IC (target backlight driver module) and the NTC (temperature sensor) as short as possible, which can reduce the influence of the wiring resistance and the connector contact resistance.

[0095] Figure 12 This is a flowchart of a method for driving a display device provided in an embodiment of the present application. Figure 12 The driving method of the display device in the embodiment is applied to the target display device in the above embodiment. Figure 12 As shown, the driving method of the display device includes:

[0096] S1, turn on the power switch and the display device is powered on.

[0097] S2, the target backlight driving module obtains the current temperature of the temperature sensing element.

[0098] S3, the target backlight driving module determines a target adjustment mode and a compensation value corresponding to the target adjustment mode based on a preset temperature control strategy, the current temperature of the temperature sensing element, and the preset initial value of the control parameter;

[0099] S4, the target backlight driving module adjusts the brightness of the backlight source module based on the target adjustment mode and the compensation value corresponding to the target adjustment mode.

[0100] Among them, the relevant contents of the temperature control strategy, the initial value of the control parameter, the target adjustment method and the compensation value are described in the introduction of the above embodiment and will not be repeated here.

[0101] Based on the same inventive concept, the present application also discloses a vehicle, including the target display device introduced in the aforementioned embodiment.

[0102] It should be noted that the various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the method embodiment, since it is basically similar to the method embodiment, the description is relatively simple. For the relevant parts, refer to the partial description of the method embodiment. The method embodiment described above is merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components indicated as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without expending creative work.

[0103] The above is merely one specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A display device, characterized in that: It includes a target backlight driving module, a backlight source module and a temperature sensing element; the temperature sensing element is located on the backlight source module; the target backlight driving module is connected to the backlight source module and the temperature sensing element respectively; The target backlight driving module is used to detect the current temperature of the temperature sensing element; The brightness of the backlight module is adjusted based on a preset temperature control strategy, the current temperature and the initial values ​​of preset control parameters; the control parameters include a reference current and a reference duty cycle; the temperature control strategy includes a correspondence between the temperature range and the brightness adjustment method of the backlight module.

2. The display device according to claim 1, wherein The target backlight driving module includes a temperature sensing control unit and a temperature sensing element detection channel; The temperature sensing element detection channel is used to detect the current temperature of the temperature sensing element and transmit the current temperature to the temperature sensing control unit; The temperature sensing control unit is used to store the temperature control strategy and the current temperature; The brightness of the backlight module is adjusted based on the current temperature, the temperature control strategy and the initial value of the control parameter.

3. The display device according to claim 2, wherein: The temperature sensing control unit includes a temperature sensing logic control subunit and a temperature sensing detection circuit subunit; The temperature sensing detection circuit subunit is used to receive the current temperature transmitted by the temperature sensing element detection channel; Converting the analog value of the current temperature into a corresponding digital value; transmitting the digital value to the temperature sensing logic control subunit; The temperature sensing logic control subunit is used to store the digital value and the temperature control strategy; The brightness of the backlight module is adjusted based on the digital value, the temperature control strategy and the initial value of the control parameter.

4. The display device according to claim 3, wherein: The temperature sensing logic control subunit includes a temperature sensing logic controller, a threshold register, a detection value buffer, a target current value register, a target duty cycle register, a first operator and a second operator; The temperature sensing logic controller is respectively connected to the threshold register, the detection value buffer, the target current value register, the target duty cycle register, the first operator, the second operator and the temperature sensing detection circuit subunit; The first arithmetic unit is connected to the target current value register and the temperature sensing logic controller respectively; The second arithmetic unit is connected to the target duty cycle register and the temperature sensing logic controller respectively; The detection value buffer is connected to the temperature sensing logic controller and the temperature sensing detection circuit subunit respectively.

5. The display device according to claim 4, wherein: The threshold register is used to store the temperature threshold corresponding to each temperature interval in the temperature control strategy; The detection value buffer is used to store the digital value of the current temperature; The temperature sensing logic controller is used to store the temperature control strategy; Controlling the operating mode of the temperature sensing detection circuit subunit; Determining a target adjustment mode and a compensation value corresponding to the target adjustment mode based on the temperature threshold, the digital value of the current temperature, and the temperature control strategy; the compensation value includes a current compensation value and / or a duty cycle compensation value; The target adjustment mode refers to a mode for adjusting the brightness of the backlight module; The target current value register is used to store the current compensation value; The target duty cycle register is used to store the duty cycle compensation value; The first operator is configured to determine the target current value based on the initial value of the reference current and the current compensation value; The target current value is used to adjust the brightness of the backlight module; The second operator is configured to determine the target duty cycle value based on an initial value of the reference duty cycle value and the duty cycle compensation value; The target duty cycle value is used to adjust the brightness of the backlight module.

6. The display device according to claim 5, wherein: The target adjustment mode is one of the first adjustment mode, the second adjustment mode and the third adjustment mode; The first adjustment method is a method of adjusting the brightness of the backlight module based on the target current value; The second adjustment method is a method of adjusting the brightness of the backlight module based on the target duty cycle value; The third adjustment method is a method of adjusting the brightness of the backlight module based on the target current value and the target duty cycle value.

7. The display device according to claim 4, wherein: The temperature threshold in the threshold register, the temperature control strategy in the temperature sensing logic controller, the initial value of the reference current, and the initial value of the reference duty cycle are set by a control system.

8. The display device according to claim 4, wherein: The temperature threshold in the threshold register and the temperature control strategy in the temperature sensing logic controller are set by a control system; the initial value of the reference current is set by an external resistor; and the initial value of the reference duty cycle is set by a hardware control pin.

9. The display device according to any one of claims 1 to 8, characterized in that: The target backlight driving module is provided with a plurality of pins externally connected to the temperature control element.

10. The display device according to any one of claims 1 to 8, characterized in that: The temperature control element includes a negative temperature coefficient thermistor and a diode.

11. A vehicle, characterized in that: A display device comprising the display device according to any one of claims 1 to 10.

12. A method for driving a display device, characterized in that: The display device includes a target backlight driving module, a backlight module and a temperature sensing element; the temperature sensing element is located on the backlight module; the target backlight driving module is connected to the backlight module and the temperature sensing element respectively; The target backlight driving module is used to obtain the current temperature of the temperature sensing element, and the brightness of the backlight module is adjusted based on a preset temperature control strategy, the current temperature, and the initial values ​​of preset control parameters; the control parameters include a reference current and a reference duty cycle; the temperature control strategy includes a correspondence between a temperature range and a brightness adjustment method of the backlight module.

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