A driving circuit board, a driving method thereof, a display module and a display device

Abstract

The embodiment of the present application discloses a driving circuit board, a driving method thereof, a display module and a display device. In a specific embodiment, the driving circuit board comprises a voltage adjustment module, which is used for adjusting a first driving voltage and a second driving voltage according to a real-time sensed ambient temperature, and providing the display panel to drive each pixel point of the display panel to display. The embodiment can effectively save power consumption while ensuring the invariability of the brightness of the display panel by dynamically adjusting the driving voltage applied to the anode and the cathode of the electroluminescent unit under different ambient temperatures, and has a wide application prospect.

Description

Technical Field

[0001] This invention relates to the field of display module technology. More specifically, it relates to a driving circuit board and its driving method, a display module, and a display device. Background Technology

[0002] With the rapid development of display technology, stacked OLED technology has become a focus of attention for those skilled in the art. However, in practical applications, it suffers from high power consumption. Summary of the Invention

[0003] The purpose of this invention is to provide a driving circuit board and its driving method, a display module and a display device, so as to solve at least one of the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: The first aspect of the present invention provides a driving circuit board for a display panel, including a voltage adjustment module for adjusting a first driving voltage and a second driving voltage according to the ambient temperature sensed in real time, and providing them to the display panel to drive each pixel of the display panel to display.

[0005] Optionally, the drive circuit board includes a timing controller and a power management module, the voltage adjustment module is disposed on the timing controller, and the voltage adjustment module includes a first temperature sensor and a data lookup table; The voltage adjustment module is used to obtain the corresponding first adjustment voltage and second adjustment voltage from the data lookup table based on the ambient temperature sensed in real time by the first temperature sensor, and transmit it to the power management module. The data lookup table includes different temperatures and first and second adjustment voltages matched to each temperature. The power management module is used to generate the first driving voltage according to the first adjustment voltage, generate the second driving voltage according to the second adjustment voltage, and transmit the first driving voltage and the second driving voltage to the display panel to drive each pixel of the display panel to display.

[0006] Optionally, the timing controller transmits the first and second adjustment voltages to the power management module via an I2C bus.

[0007] Optionally, the drive circuit board further includes a power management module. The voltage adjustment module includes a voltage divider circuit unit and a voltage adjustment unit, the voltage adjustment unit being disposed within the power management module. The power management module includes a first drive voltage generation unit and a second drive voltage generation unit. The voltage divider circuit unit is used to output a third adjustable voltage to the voltage adjustment unit according to the ambient temperature. The voltage adjustment unit is used to generate a reference voltage based on a third adjustment voltage and an adjustment voltage based on ambient temperature, and to transmit the reference voltage and the adjustment voltage to the first driving voltage generation unit and the second driving voltage generation unit. The first driving voltage generation unit is configured to generate the first driving voltage based on the reference voltage and the adjustment voltage; The second driving voltage generation unit is used to generate the second driving voltage based on the reference voltage and the adjustment voltage.

[0008] Optionally, the voltage divider circuit unit includes a first voltage divider resistor, a second voltage divider resistor, and a thermistor, each including a first terminal and a second terminal, wherein... The first end of the first voltage divider resistor is connected to the first power supply signal, and the second end of the first voltage divider resistor, the first end of the second voltage divider resistor, and the first end of the thermistor are connected to the first node and output the third adjustment voltage. The second terminal of the second voltage divider resistor and the second terminal of the thermistor are connected to the second power supply signal.

[0009] Optionally, the voltage adjustment unit includes a compensation unit and an adjustment unit, wherein The compensation unit is used to generate a reference voltage based on the third adjustment voltage and transmit it to the first driving voltage generation unit and the second driving voltage generation unit. The adjustment unit includes a second temperature sensor and a temperature comparison unit. The temperature comparison unit is used to compare the ambient temperature sensed in real time by the second temperature sensor with a preset temperature threshold and generate an adjustment voltage. The adjustment unit is used to transmit the adjustment voltage to the first driving voltage generation unit and the second driving voltage generation unit, respectively.

[0010] A second aspect of the present invention provides a display module, including a display panel and the driving circuit board; The display panel displays information based on the first driving voltage and the second driving voltage output by the driving circuit board.

[0011] Optionally, the display module includes multiple sub-pixel units arranged in an array, and each sub-pixel unit includes at least two light-emitting units stacked together.

[0012] A third aspect of the present invention provides a display device including the aforementioned display module.

[0013] A fourth aspect of the present invention provides a driving method for the aforementioned driving circuit board, comprising: The first driving voltage and the second driving voltage are adjusted according to the real-time sensed ambient temperature. The first driving voltage and the second driving voltage are provided to the display panel to drive each pixel of the display panel to display.

[0014] The beneficial effects of this invention are as follows: The solution described in this invention dynamically adjusts the driving voltage applied to the anode and cathode of the electroluminescent unit by sensing the ambient temperature in real time under different ambient temperatures. This effectively saves power consumption while ensuring that the brightness of the display panel remains unchanged, and has broad application prospects. Attached Figure Description

[0015] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0016] Figure 1 A schematic diagram of the structure of a stacked OLED device in the related technology is shown.

[0017] Figure 2 A schematic diagram of the pixel driving circuit of an OLED device in the related art is shown.

[0018] Figure 3 A schematic diagram of the circuit driving architecture of a display panel in the related art is shown.

[0019] Figure 4 A schematic diagram of the structure of a display panel provided in an embodiment of the present invention is shown.

[0020] Figure 5 A schematic diagram of the structure of a display panel provided in an embodiment of the present invention is shown.

[0021] Figure 6 This diagram illustrates another structural schematic of the display panel provided in an embodiment of the present invention.

[0022] Figure 7 This diagram illustrates the applied voltage of the OLED on the driving circuit board of the display panel provided in an embodiment of the present invention at different temperatures.

[0023] Figure 8 The diagram shows the brightness curves of the OLED at different temperatures for the driving circuit board of the display panel provided in the embodiment of the present invention.

[0024] Figure 9 The diagram shows the current efficiency curves of the OLED at different temperatures for the driving circuit board of the display panel provided in the embodiment of the present invention.

[0025] Figure 10 The diagram shows the external quantum efficiency curves of the OLED at different temperatures for the driving circuit board of the display panel provided in the embodiment of the present invention. Detailed Implementation

[0026] It should be noted that although the terms "first," "second," etc., may be used herein to describe various components, members, elements, regions, layers, and / or parts, these components, members, elements, regions, layers, and / or parts should not be limited by these terms. Rather, these terms are used to distinguish one component, member, element, region, layer, and / or part from another. Thus, for example, the first component, first member, first element, first region, first layer, and / or first part discussed below may be referred to as a second component, second member, second element, second region, second layer, and / or second part without departing from the teachings of this disclosure.

[0027] Tandem OLED (Organic Light-Emitting Diode) devices, also known as tandem organic light-emitting devices, connect two or more independent light-emitting units through an intermediate charge generator layer (CGL). Under the influence of an external electric field, the charge generator layer generates holes and electrons, which are injected into the hole transport layer and electron transport layer of the adjacent light-emitting unit, respectively, and recombine with electrons and holes from the cathode and anode to emit light. Tandem OLED is developed based on related OLED technologies, and therefore not only possesses the advantages of OLED such as light weight, ultra-thinness, low power consumption, flexibility, transparency, and environmental friendliness, but also achieves high efficiency, low current, and long lifespan.

[0028] like Figure 1 The diagram shown is a schematic representation of the structure of a stacked OLED device in related technologies. Figure 1It contains two light-emitting units, a first light-emitting unit 10 and a second light-emitting unit 20. The first light-emitting unit 10 includes, from bottom to top, a P-type charge generation layer (PCGL) 101, a hole transport layer (HTL) 102, an electron block layer (EBL) 103, an emission layer (EML), a hole block layer (HBL) 107, an electron transport layer (ETL) 108, and an electron injection layer / cathode (EIL) 109. The emission layer includes a red emission layer (REML) 104, a green emission layer (GEML) 105, and a blue emission layer (BEML) 106.

[0029] The second light-emitting unit 20 includes, from bottom to top, a substrate (Glass) 201, an anode 202, a hole injection layer (HIL) 203, a hole transport layer (HTL) 204, an electron block layer (EBL) 205, an emission layer (EML), a hole block layer (HBL) 209, an electron transport layer (ETL) 2010, and an N-type charge generator layer (NCGL) 2011; wherein the emission layer includes a red emission layer (REML) 206, a green emission layer (GEML) 207, and a blue emission layer (BEML) 208.

[0030] Furthermore, Figure 1In the diagram, the CGL in the middle is divided into NCGL2011 and PCGL101. NCGL2011 is made of the same material as the electron injection layer (EIL), but typically has a higher doping concentration. PCGL101 is made of the same material as the hole injection layer (HIL), but typically has a higher doping concentration. The higher doping concentration is to ensure increased electron and hole transport rates at low supply voltages, thereby reducing power consumption.

[0031] The relationship between carrier concentration, mobility, and temperature reveals that semiconductor scattering primarily consists of ionized impurity scattering and lattice scattering. At higher doping concentrations, lattice vibrations are weaker at low temperatures, leading primarily to ionized impurity scattering, thus increasing mobility with increasing temperature. At higher temperatures, lattice scattering becomes dominant; as temperature rises, the amplitude of lattice vibrations increases, enhancing the scattering effect on carrier motion, thereby decreasing mobility. The temperature at which mobility is maximized depends on the ionized impurity content; higher impurity content results in higher transition temperatures.

[0032] The inventors, through extensive experimentation, pointed out that as temperature increases, OLED mobility increases, and the voltage across the device (V_OLED) can decrease; after reaching the transition temperature, further heating decreases OLED mobility, and V_OLED can increase. Figure 2 The diagram shows a pixel driving circuit of an OLED device in related technologies. The voltage across the device is proportional to the difference between the anode voltage (ELVDD) and the cathode voltage (ELVSS) of the electroluminescent device, i.e., V_OLED ∝ ELVDD - ELVSS. Therefore, ELVDD - ELVSS ( There is also a trend of change with temperature, that is, from low temperature to high temperature, Gradually decrease and then increase.

[0033] like Figure 3 The diagram shown is a schematic of the circuit driving architecture of a display panel in related technologies. Figure 3 It includes a driver circuit board XPCB11, a driver IC 12, and a display panel 13.

[0034] Furthermore, the XPCB11 includes components such as a timing controller (TCON) 111 and a power management IC (PMIC) 112.

[0035] TCON111 includes interface 1111, timing control module 1112, and data mapping module 1113. Interface 1111 receives front-end image or video information, such as through an eDP interface, or transmits image data to Datamapping 1113 via the built-in Bist (Built in self-test) test mode of TCON111. The generated high-speed differential signal is transmitted to Driver IC12 via P to P protocol such as iSP1114. The synchronization signals such as row synchronization (Hs), column synchronization (Vs), and data enable (DE) received by TCON11 are given to Timing control 1112. This module is mainly used to generate the timing of the Gate Driven on Array (GOA) 1115 required by Panel 13.

[0036] PMIC112 is the power generation device for the entire circuit, including a first buck or boost unit 1121, a second buck or boost unit 1122, a boost unit 1123, and an inverter converter unit 1124, which mainly provides voltage to TCON111, Driver IC112, and Panel13.

[0037] The main function of Driver IC12 is to convert the received differential signal into the analog voltage signal required by Panel13.

[0038] Panel 13 includes a display area (AA) 131 and a GOA circuit 132, with the aforementioned ELVDD and ELVSS provided to the Tandem OLED device on Panel 13.

[0039] However, the relevant technologies do not take into account ELVDD-ELVSS ( There is also a trend of change with temperature, that is, from low temperature to high temperature, Gradually decrease and then increase. The inventors pointed out that because the voltages of ELVDD and ELVSS are the same at different temperatures in related technologies, there is a problem of high power consumption.

[0040] In view of this, one embodiment of the present invention provides a driving circuit board for a display panel, such as... Figure 4The diagram shown is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention. The driving circuit board 10000 includes a voltage adjustment module 10001, which is used to adjust the first driving voltage and the second driving voltage according to the ambient temperature sensed in real time, and provide them to the display panel 20000 to drive each pixel of the display panel to display.

[0041] This embodiment senses the ambient temperature in real time and dynamically adjusts the driving voltage applied to the anode and cathode of the electroluminescent unit under different ambient temperatures. This effectively saves power consumption while ensuring that the brightness of the display panel remains unchanged, and has broad application prospects.

[0042] In one alternative embodiment, such as Figure 5 The diagram shows a schematic of the display panel provided in an embodiment of the present invention. The driving circuit board includes a timing controller 100 and a power management module 200. The voltage adjustment module is disposed on the timing controller 100 and includes a first temperature sensor 1001 and a look-up table (LUT) 1002. The voltage adjustment module is used to obtain the corresponding first adjustment voltage and second adjustment voltage from the look-up table 1002 according to the ambient temperature sensed in real time by the first temperature sensor 1001, and transmit them to the power management module 200. The look-up table 1002 includes different temperatures and first and second adjustment voltages matched to each temperature. The power management module 200 is used to generate the first driving voltage according to the first adjustment voltage, generate the second driving voltage according to the second adjustment voltage, and transmit the first driving voltage and the second driving voltage to the display panel 300 to drive each pixel of the display panel 300 to display.

[0043] Specifically, this embodiment addresses the issue that the charge generation layer in a stacked OLED device exhibits different carrier mobilities at different temperatures, leading to variations in the current I_OLED of the stacked OLED device. Based on this characteristic, by sensing the ambient temperature in real time and dynamically adjusting the driving voltage applied to the anode and cathode of the electroluminescent unit device at different ambient temperatures, it is possible to achieve dynamic adjustment of the driving voltage with changes in ambient temperature while maintaining constant brightness, thereby effectively reducing the power consumption of the display device.

[0044] In a specific example, firstly, the ELVDD or ELVSS settable voltages are tested at different temperatures. Secondly, the test results are saved in LUT1002, including the corresponding ELVDD and ELVSS voltages at different temperatures. Table 1 shows the ELVDD / ELVSS set values ​​for a pixel circuit including PMOS transistors at different temperatures, and Table 2 shows the ELVDD / ELVSS set values ​​for a pixel circuit including NMOS transistors at different temperatures. For a pixel circuit including PMOS transistors, the ELVDD / ELVSS set values ​​at different temperatures are obtained by referring to Table 1, i.e., different ELVSS set values ​​correspond to different PMOS transistors at different temperatures, while ELVDD is set to a fixed value. For a pixel circuit including NMOS transistors, the ELVDD / ELVSS set values ​​at different temperatures are obtained by referring to Table 2, i.e., different ELVDD set values ​​correspond to different NMOS transistors at different temperatures, while ELVSS is set to a fixed value. When a pixel circuit contains both PMOS and NMOS transistors, the ELVDD / ELVSS set values ​​at different temperatures can be obtained by referring to Tables 1 and 2.

[0045] Table 1. ELVDD / ELVSS settings for pixel circuits including PMOS transistors at different temperatures.

[0046] Table 2. ELVDD / ELVSS settings for pixel circuits including NMOS transistors at different temperatures.

[0047] In an optional embodiment, the timing controller 100 transmits the first and second adjusted voltages to the power management module 200 via an I2C bus to adjust the voltage in real time.

[0048] In a specific example, the first temperature sensor 1001 in TCON100 senses the temperature of the display panel 300; based on the sensed real-time temperature, TCON100 writes the different ELVDD and ELVSS voltages corresponding to the real-time temperature in LUT1002 into PMIC200 via the I2C protocol; PMIC200 provides the adjusted first drive voltage and second drive voltage to Panel300.

[0049] In one alternative embodiment, such as Figure 6The diagram shows another structural schematic of the display panel provided in an embodiment of the present invention. The driving circuit board further includes a power management module 2000. The voltage adjustment module includes a voltage divider circuit unit 1000 and a voltage adjustment unit 2006. The voltage adjustment unit 2006 is disposed in the power management module 2000. The power management module 2000 includes a first driving voltage generation unit 2004 and a second driving voltage generation unit 2005. The voltage divider circuit unit 1000 is used to output a third adjustment voltage to the voltage adjustment unit 2006 according to the ambient temperature. The voltage adjustment unit 2006 is used to generate a reference voltage according to the third adjustment voltage and an adjustment voltage according to the ambient temperature, and transmit the reference voltage and the adjustment voltage to the first driving voltage generation unit 2004 and the second driving voltage generation unit 2005. The first driving voltage generation unit 2004 is used to generate a first driving voltage according to the reference voltage and the adjustment voltage. The second driving voltage generation unit 2005 is used to generate a second driving voltage according to the reference voltage and the adjustment voltage.

[0050] In a specific example, the first driving voltage generation unit 2004 and the second driving voltage generation unit 2005 can be a boost circuit and an inverter circuit, respectively.

[0051] In one alternative embodiment, such as Figure 6 As shown, the voltage divider circuit unit 1000 includes a first voltage divider resistor 1010, a second voltage divider resistor 1020, and a thermistor 1003, each with a first terminal and a second terminal. The first terminal of the first voltage divider resistor 1010 is connected to a first power supply signal VDD. The second terminal of the first voltage divider resistor 1010, the first terminal of the second voltage divider resistor 1020, and the first terminal of the thermistor 1003 are connected to a first node and output the third adjustment voltage. The second terminals of the second voltage divider resistor 1020 and the second terminal of the thermistor 1003 are connected to a second power supply signal (i.e., ground).

[0052] In a specific example, the thermistor 1003 can be a negative temperature coefficient thermistor.

[0053] Furthermore, the voltage divider circuit unit 1000 includes a first voltage divider resistor 1010, a second voltage divider resistor 1020, and a negative temperature coefficient thermistor 1003, wherein the negative temperature coefficient thermistor 1003 is connected in parallel with the second voltage divider resistor 1020. The resistance of the negative temperature coefficient thermistor 1003 decreases (or increases) as the temperature rises (or falls), thereby causing the third adjustment voltage (VTC) to decrease (or increase).

[0054] The formula for calculating VTC is as follows:

[0055] In the formula, This is the resistance value of the first voltage divider resistor; This is the resistance value of the second voltage divider resistor; The resistance value of a thermistor with a negative temperature coefficient; The voltage value of the first power supply signal VDD; It is the resistance value of the negative temperature coefficient thermistor connected in parallel with the second voltage divider resistor.

[0056] In one alternative embodiment, such as Figure 6 As shown, the voltage adjustment unit 2006 includes a compensation unit 2003 and an adjustment unit. The compensation unit 2003 is used to generate a reference voltage based on a third adjustment voltage and transmit it to the first driving voltage generation unit 2004 and the second driving voltage generation unit 2005. The adjustment unit includes a second temperature sensor 2001 and a temperature comparison unit 2002. The temperature comparison unit 2002 is used to compare the ambient temperature sensed in real time by the second temperature sensor 2001 with a preset temperature threshold and generate an adjustment voltage. The adjustment unit is used to transmit the adjustment voltage to the first driving voltage generation unit 2004 and the second driving voltage generation unit 2005 respectively.

[0057] In a specific example, the voltage adjustment unit includes a temperature compensation unit, a second temperature sensor, and a temperature comparison unit, while the voltage divider circuit unit includes a voltage divider resistor and a thermistor.

[0058] In this embodiment, the compensation unit includes a temperature compensation unit, and the adjustment unit includes a second temperature sensor and a temperature comparison unit. The temperature compensation unit is connected to the third adjustment voltage output by the voltage divider circuit unit. Since the third adjustment voltage output by the voltage divider circuit unit is different at different temperatures, the reference voltage output by the temperature compensation unit is different. The reference voltage is output to the first driving voltage generation unit and the second driving voltage generation unit. In the adjustment unit, the second temperature sensor senses different temperatures, and the temperature comparison unit compares them to determine whether to use positive compensation or negative compensation as the adjustment voltage. The adjustment voltage is then transmitted to the first driving voltage generation unit and the second driving voltage generation unit, respectively.

[0059] Specifically, the input port of the temperature compensation unit is connected to the output port of the voltage divider circuit unit. The voltage divider circuit unit is used to output a third adjustment voltage according to the decrease (or increase) of the resistance of the thermistor as the temperature rises (or falls). The third adjustment voltage (VTC voltage) is based on the decrease (or increase) of the thermistor.

[0060] The second temperature sensor is used to sense the ambient temperature and transmit this temperature to the temperature comparison unit. The temperature comparison unit compares the real-time ambient temperature T sensed by the second temperature sensor with a preset temperature threshold and outputs a compensation polarity (i.e., adjustment voltage). If the temperature at which the mobility is at its maximum is Ttrans, this temperature is used as the set temperature.

[0061] When the ambient temperature T At Ttrans, the migration rate increases with increasing temperature. (ELVDD-ELVSS) can be reduced, that is, ELVDD decreases or ELVSS increases. ELVDD is positive compensation and ELVSS is negative compensation. When the ambient temperature T At Ttrans, the migration rate decreases with increasing temperature. (ELVDD-ELVSS) can be increased, that is, ELVDD increases or ELVSS decreases. ELVDD is negative compensation and ELVSS is positive compensation.

[0062] The temperature compensation unit is used to convert the third adjustment voltage (VTC voltage) into a reference voltage, and in conjunction with the adjustment voltage control to generate the ELVDD voltage by the first driving voltage generation unit (boost circuit) and the second driving voltage generation unit (inverter circuit) to generate the ELVSS voltage, outputs the voltage at the corresponding temperature, and outputs the above-mentioned corrected voltage to the display panel to achieve power consumption reduction.

[0063] In a specific example, the drive circuit board was tested under conditions including a fixed current density of 10 mA / cm². 2 One Tandem OLED device, including two light-emitting units; the light-emitting area (i.e., the light-emitting area of ​​a single sub-pixel) is 3mm*3mm.

[0064] Table 3 shows the test data of voltage, brightness, current efficiency, and external quantum efficiency of stacked Tandem OLED R / G / B at different temperatures from room temperature to 100℃. Figures 7 to 10 The curves for these four parameters correspond to different temperatures.

[0065] Table 3 Test data at different temperatures

[0066] like Figure 7 As shown, from 23℃ to 100℃, the voltage across the R / G / B terminals of the Tandem OLED decreases by approximately 1V, meaning the voltage V_OLED across the electroluminescent device decreases by 1V. Figure 2 It is known that ELVDD-ELVSS can reduce the voltage by 1V.

[0067] Furthermore, taking the highest reliability temperature of 85℃ as the highest possible application temperature, and calculating the ELVDD-ELVSS voltage based on the standard 7V voltage of a notebook computer, the power saving at 85℃ compared to 23℃ is as follows: Tandem R: (6.04-5.12) / 7=13.14%; Tandem G: (6.55-5.56) / 7=14.14%; Tandem B: (7.52-6.87) / 7=9.29%; It can be seen that by dynamically adjusting the driving voltage applied to the anode and cathode of the electroluminescent unit under different ambient temperatures, power consumption can be effectively saved while ensuring that the brightness of the display panel remains unchanged.

[0068] Depend on Figures 8 to 10 It can be seen that the current density is fixed at 10 mA / cm² at different temperatures. 2 At this time, the brightness, current efficiency, and external quantum efficiency of the red sub-pixel R, green sub-pixel G, and blue sub-pixel B remain basically unchanged. The brightness of R and G shows a decreasing trend, but remains at around 5%; the brightness of B shows an increasing trend, about 2.5%, both within an acceptable fluctuation range. If the current efficiency is optimized to maintain consistency at different temperatures, the potential for power consumption reduction can be further increased.

[0069] This embodiment senses the ambient temperature in real time and dynamically adjusts the driving voltage applied to the anode and cathode of the electroluminescent unit under different ambient temperatures. This effectively saves power consumption while ensuring that the brightness of the display panel remains unchanged, and has broad application prospects.

[0070] A second embodiment of the present invention provides a display module, including a display panel and the aforementioned driving circuit board; the display panel displays based on a first driving voltage and a second driving voltage output by the driving circuit board.

[0071] In one optional embodiment, the display module includes a plurality of sub-pixel units arranged in an array, each sub-pixel unit including at least two light-emitting units stacked together.

[0072] This embodiment senses the ambient temperature in real time and dynamically adjusts the driving voltage applied to the anode and cathode of the electroluminescent unit under different ambient temperatures. This effectively saves power consumption while ensuring that the brightness of the display panel remains unchanged, and has broad application prospects.

[0073] A third embodiment of the present invention provides a display device including the aforementioned display module.

[0074] This embodiment senses the ambient temperature in real time and dynamically adjusts the driving voltage applied to the anode and cathode of the electroluminescent unit under different ambient temperatures. This effectively saves power consumption while ensuring that the brightness of the display panel remains unchanged, and has broad application prospects.

[0075] A fourth embodiment of the present invention provides a driving method for the driving circuit board, comprising: adjusting a first driving voltage and a second driving voltage according to the ambient temperature sensed in real time; and providing the first driving voltage and the second driving voltage to a display panel to drive each pixel of the display panel to display.

[0076] This embodiment senses the ambient temperature in real time and dynamically adjusts the driving voltage applied to the anode and cathode of the electroluminescent unit under different ambient temperatures. This effectively saves power consumption while ensuring that the brightness of the display panel remains unchanged, and has broad application prospects.

[0077] Obviously, the above embodiments of this disclosure are merely examples for clearly illustrating this disclosure, and are not intended to limit the implementation of this disclosure. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all implementation methods here. Any obvious variations or modifications derived from the technical solutions of this disclosure are still within the protection scope of this disclosure.

Claims

1. A driving circuit board for a display panel, characterized in that, It includes a voltage adjustment module, which is used to adjust the first driving voltage and the second driving voltage according to the real-time sensed ambient temperature, and provide them to the display panel to drive each pixel of the display panel to display. The driver circuit board includes a timing controller and a power management module, with the voltage adjustment module mounted on the timing controller. The drive circuit board further includes a power management module. The voltage adjustment module includes a voltage divider circuit unit and a voltage adjustment unit, with the voltage adjustment unit disposed within the power management module. The power management module includes a first drive voltage generation unit and a second drive voltage generation unit. The voltage divider circuit unit is used to output a third adjustment voltage to the voltage adjustment unit according to the ambient temperature. The voltage adjustment unit is used to generate a reference voltage based on a third adjustment voltage and an adjustment voltage based on ambient temperature, and to transmit the reference voltage and the adjustment voltage to the first driving voltage generation unit and the second driving voltage generation unit. The first driving voltage generation unit is configured to generate the first driving voltage based on the reference voltage and the adjustment voltage; The second driving voltage generation unit is used to generate the second driving voltage based on the reference voltage and the adjustment voltage; The voltage adjustment unit includes a compensation unit and an adjustment unit, wherein... The compensation unit is used to generate a reference voltage based on the third adjustment voltage and transmit it to the first driving voltage generation unit and the second driving voltage generation unit. The adjustment unit includes a second temperature sensor and a temperature comparison unit. The temperature comparison unit is used to compare the ambient temperature sensed in real time by the second temperature sensor with a preset temperature threshold and generate an adjustment voltage. The adjustment unit is used to transmit the adjustment voltage to the first driving voltage generation unit and the second driving voltage generation unit, respectively.

2. The driving circuit board according to claim 1, characterized in that, The voltage divider circuit unit includes a first voltage divider resistor, a second voltage divider resistor, and a thermistor, each comprising a first terminal and a second terminal, wherein... The first end of the first voltage divider resistor is connected to the first power supply signal, and the second end of the first voltage divider resistor, the first end of the second voltage divider resistor, and the first end of the thermistor are connected to the first node and output the third adjustment voltage. The second terminal of the second voltage divider resistor and the second terminal of the thermistor are connected to the second power supply signal.

3. A display module, characterized in that, It includes a display panel and a driving circuit board as described in any one of claims 1 to 2; The display panel displays information based on the first driving voltage and the second driving voltage output by the driving circuit board.

4. The display module according to claim 3, characterized in that, The display module includes multiple sub-pixel units arranged in an array, and each sub-pixel unit includes at least two light-emitting units stacked together.

5. A display device, characterized in that, Includes the display module as described in claim 3 or 4.

6. A driving method using a driving circuit board as described in any one of claims 1 to 2, characterized in that, include: The first driving voltage and the second driving voltage are adjusted according to the real-time sensed ambient temperature. The first driving voltage and the second driving voltage are provided to the display panel to drive each pixel of the display panel to display.

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