A display module and display device

Abstract

This application discloses a display module and a display device. The display module includes a driving circuit and a control circuit. The driving circuit includes a first thin-film transistor (TFT) and a second TFT. The second TFT is electrically connected to the first TFT at a first node. The control circuit includes an output terminal and a voltage acquisition terminal. The output terminal is electrically connected to the control terminal of the second TFT, and the voltage acquisition terminal is electrically connected to the first node. The control circuit is used to adjust the resistance value of the second TFT based on the voltage of the first node. This application can adaptively adjust the equivalent resistance value of the second TFT according to different external ambient illumination conditions, thereby keeping the voltage acquired by the voltage acquisition terminal within the range, reducing the adjustment deviation of the brightness value, and thus improving the display effect of the display panel.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display module and display device. Background Technology

[0002] With the rapid development of display technology, users have placed higher demands on the visual experience and performance of display panels. However, existing display panels, due to their fixed hardware parameters, cannot adaptively adjust their hardware parameters according to ambient light levels. This results in significant deviations in the brightness values ​​adjusted by the display panel, leading to decreased local display capabilities and insufficient detail in low-light environments, while in high-light environments, overexposure and other problems can easily occur, severely affecting the display effect. Summary of the Invention

[0003] This application provides a display module and display device, which can reduce the adjustment deviation of the brightness value, thereby improving the display effect of the display panel.

[0004] In a first aspect, embodiments of this application provide a display module, which includes: a driving circuit and a control circuit; The driving circuit includes a first thin-film transistor and a second thin-film transistor; the second thin-film transistor is electrically connected to the first thin-film transistor at a first node; The control circuit includes an output terminal and a voltage acquisition terminal; the output terminal is electrically connected to the control terminal of the second thin-film transistor, and the voltage acquisition terminal is electrically connected to the first node. The control circuit is used to adjust the resistance value of the second thin-film transistor based on the voltage of the first node.

[0005] Secondly, embodiments of this application provide a display device, including the display module corresponding to the above embodiments.

[0006] Compared with the prior art, the display module and display device provided in this application achieve at least the following beneficial effects: This application provides a display module and a display device. The display module includes a driving circuit and a control circuit. The driving circuit includes a first thin-film transistor (TFT) and a second TFT. The second TFT is electrically connected to the first TFT at a first node. The control circuit includes an output terminal and a voltage acquisition terminal. The output terminal is electrically connected to the control terminal of the second TFT, and the voltage acquisition terminal is electrically connected to the first node. The control circuit is used to adjust the resistance value of the second TFT based on the voltage of the first node. The channel on-resistance of the first TFT changes continuously with the light intensity of the external environment, and the current-voltage change has an approximately linear ohmic characteristic. Therefore, the first TFT can be equivalent to a variable photoresistor. The first TFT changes the circuit flowing through it according to the illuminance of the current environment. The voltage acquisition terminal of the control circuit calculates the voltage at the first node based on the current flowing through the first TFT, thereby acquiring the voltage at the first node. Based on the voltage at the first node, a voltage signal is provided to the control terminal of the second TFT through the output terminal, thereby changing the conduction state of the second TFT and adjusting the equivalent resistance value of the second TFT. At this point, the equivalent total resistance of the first and second thin-film transistors also changes, and the current flowing through the first thin-film transistor changes. Furthermore, the voltage acquisition terminal of the control circuit will re-acquire the changed voltage value based on the changed current, ensuring that the changed voltage value remains within the measurement range. Therefore, this application can adaptively adjust the equivalent resistance of the second thin-film transistor according to different external ambient light conditions, thereby ensuring that the voltage acquired by the voltage acquisition terminal remains within the measurement range, reducing brightness adjustment deviation, and thus improving the display effect of the display panel. Attached Figure Description

[0007] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals denote the same or similar features, and the drawings are not drawn to scale.

[0008] Figure 1 A schematic diagram of the structure of a display module provided for related technologies; Figure 2 This is a schematic diagram of the structure of a display module provided in an embodiment of this application; Figure 3 This is a schematic diagram of an equivalent circuit of a display module provided in an embodiment of the present disclosure; Figure 4 This is a schematic diagram of the structure of another display module provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of another display module provided in an embodiment of this application; Figure 6This is a schematic diagram of the structure of a display panel provided in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. Detailed Implementation

[0009] The features and exemplary embodiments of various aspects of this application will now be described in detail. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this application and are not configured to limit this application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples of this application.

[0010] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0011] It should be understood that when describing the structure of a component, when referring to a layer or region as being "above" or "on top of" another layer or region, it can mean that it is directly above the other layer or region, or that it contains other layers or regions between it and the other layer or region. Furthermore, if the component is flipped over, that layer or region will be located "below" or "under" the other layer or region.

[0012] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0013] In the embodiments of this application, the term "electrical connection" can refer to a direct electrical connection between two components, or it can refer to an electrical connection between two components via one or more other components.

[0014] In the embodiments of this application, the first node, the second node, and the third node are defined only for the convenience of describing the circuit structure, and the first node, the second node, and the third node are not actual circuit units.

[0015] Various modifications and variations can be made to this application without departing from its spirit or scope, which will be apparent to those skilled in the art. Therefore, this application is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the implementation methods provided in the embodiments of this application can be combined with each other without contradiction.

[0016] Before describing the technical solutions provided in the embodiments of this application, in order to facilitate understanding of the embodiments of this application, this application first specifically explains the problems existing in the related technologies: With the rapid development of display technology, users have placed higher demands on the visual experience and performance of display panels.

[0017] Figure 1 A schematic diagram of the structure of a display module is provided for related technologies, such as Figure 1 As shown, the display module includes a flexible circuit board 10', a driver chip 20', and a photosensitive device 30'. The flexible circuit board 10' includes a first resistor R', and the photosensitive device 30' is electrically connected to both the driver chip 20' and the first resistor R', with the first resistor R' grounded. The driver chip 20' determines the ambient illuminance by collecting the voltage across the first resistor R'.

[0018] The ambient light intensity varies. Under low illumination, the current generated by the photosensitive device 30' is smaller, while under high illumination, the current generated by the photosensitive device 30' is larger. Since the driver chip 20' can only detect voltages within its range, the resistance value of the first resistor R' needs to be adjusted in order to control the voltage acquired by the driver chip 20' within its range.

[0019] For example, under low illumination, the current generated by the photosensitive device 30' is relatively small, and the current flowing through the first resistor R' is also relatively small. This causes the voltage sampled by the driving chip 20' from the first resistor R' to decrease. Therefore, to increase the voltage, the resistance value of the first resistor R' can be increased, or the current generated by the photosensitive device 30' can be increased. Under high illumination, the current generated by the photosensitive device 30' is relatively large, and the current flowing through the first resistor R' is also relatively large. This causes the voltage sampled by the driving chip 20' from the first resistor R' to increase. Therefore, to decrease the voltage, the resistance value of the first resistor R' can be decreased, or the current generated by the photosensitive device 30' can be decreased.

[0020] However, increasing the current generated by the photosensitive device 30' will reduce the acquisition accuracy of the driver chip 20' and cause overexposure of the image under high illumination. Conversely, reducing the current generated by the photosensitive device 30' will result in insufficient signal under low illumination.

[0021] Furthermore, since all the hardware parameters in the flexible circuit board 10' are fixed, the resistance value of the first resistor R' is also fixed. This makes it impossible for the display panel to adaptively adjust the resistance value of the first resistor R' according to the ambient light level. Therefore, in low-light environments, the local display capability of the display panel decreases, and the detail representation is insufficient. In high-light environments, problems such as overexposure of the image are prone to occur, which seriously affects the display effect of the display panel.

[0022] Figure 2 This is a schematic diagram of the structure of a display module provided in an embodiment of this application, as shown below. Figure 2 As shown, the display module includes a control circuit 10 and a drive circuit 20. The drive circuit 20 includes a first thin-film transistor T1 and a second thin-film transistor T2. The second thin-film transistor T2 is electrically connected to the first thin-film transistor T1 at the first node A.

[0023] For example, the first terminal of the first thin-film transistor T1 is connected to the first voltage terminal 21, the second terminal of the first thin-film transistor T1 and the first terminal of the second thin-film transistor T2 are connected to the first node A, and the second terminal of the second thin-film transistor T2 is connected to the second voltage terminal 22. The control terminal of the first thin-film transistor T1 is connected to the gate voltage terminal 23, and the gate voltage terminal 23 is used to provide a voltage signal to the control terminal of the first thin-film transistor T1.

[0024] The first thin-film transistor T1 is a photosensitive thin-film transistor, therefore it can be considered equivalent to a photoresistor. The control terminal of the second thin-film transistor T2 receives different voltage signals, resulting in varying degrees of conduction and thus different current flows through it. According to Ohm's law, the second thin-film transistor T2 can be considered equivalent to an adjustable resistor.

[0025] Because the semiconductor layer of a photosensitive thin-film transistor (TFT) is photosensitive, when light shines on the channel region of the TFT, photogenerated electron-hole pairs are generated. These additional charge carriers increase the conductivity of the channel. Therefore, the channel on-resistance of the first TFT T1 changes continuously with the intensity of light from the external environment, and the change in current-voltage is approximately linear ohmic. Thus, the first TFT can be considered equivalent to a variable photoresistor. The equivalent resistance of the photosensitive TFT remains essentially constant under different light intensities.

[0026] The control circuit 10 includes an output terminal 11 and a voltage acquisition terminal 12; the output terminal 11 is electrically connected to the control terminal of the second thin-film transistor T2, and the voltage acquisition terminal 12 is electrically connected to the first node A; the control circuit 10 is used to adjust the resistance value of the second thin-film transistor T2 based on the voltage of the first node A.

[0027] For example, voltage acquisition terminal 12 is connected to the first node A. The control circuit 10 can adjust the voltage signal provided by output terminal 11 based on the voltage acquired by voltage acquisition terminal 12 at the first node A. Output terminal 11 provides a voltage signal to the control terminal of the second thin-film transistor T2, thereby controlling the conduction degree of the second thin-film transistor T2, so that the resistance value of the adjustable resistor equivalent to the second thin-film transistor T2 changes.

[0028] Figure 3 This is an equivalent circuit diagram of a display module provided in an embodiment of the present disclosure, such as... Figure 3 As shown, the first thin-film transistor T1 can be equivalent to a photoresistor R1, and the second thin-film transistor T2 can be equivalent to an adjustable resistor R2. The first terminal of the photoresistor R1 is connected to the first voltage terminal 21, the second terminal of the photoresistor R1 is connected to the first terminal of the adjustable resistor R2 and the voltage acquisition terminal 12, and the second terminal of the adjustable resistor R2 is connected to the second voltage terminal 22, which is a ground terminal.

[0029] When the first thin-film transistor T1 senses the light intensity, a first current flows through it. The voltage acquisition terminal 12 of the control circuit 10 calculates the acquired first voltage based on this first current. At this time, the control circuit 10 determines the illuminance of the display module in the current environment based on the first voltage. The second thin-film transistor T2 and the first thin-film transistor T1 can be equivalent to a... Figure 3 The series circuit shown.

[0030] Under normal illuminance conditions, the control circuit 10 provides voltage to the gate of the second thin-film transistor T2 through the output terminal 11, thereby adjusting the conduction level of the second thin-film transistor T2. This stabilizes the resistance value of the adjustable resistor R2, which is equivalent to the second thin-film transistor T2, within a certain resistance range. Consequently, the total resistance value of the first thin-film transistor T1 and the second thin-film transistor T2 is also stabilized, thus stabilizing the first voltage acquired by the voltage acquisition terminal 12 of the control circuit 10. The voltage provided by the control circuit 10 through the output terminal 11 keeps the conduction level of the second thin-film transistor T2 stable.

[0031] Under high illumination conditions, the control circuit 10 supplies voltage to the gate of the second thin-film transistor T2 through its output terminal 11, thereby adjusting the conduction level of the second thin-film transistor T2. This increases the resistance of the adjustable resistor R2, which is equivalent to the second thin-film transistor T2, and consequently, the total resistance of the first thin-film transistor T1 and the second thin-film transistor T2 also increases, causing the first current to decrease and become the second current. Furthermore, the voltage acquisition terminal 12 of the control circuit 10 calculates the acquired second voltage based on the second current, which is less than the first voltage. Thus, under high illumination conditions, this application can reduce the current in the equivalent series circuit, thereby increasing the resistance of the adjustable resistor R2, which is equivalent to the second thin-film transistor T2, ensuring that the voltage acquired by the voltage acquisition terminal does not exceed the range, thereby reducing the risk of image overexposure under high illumination conditions.

[0032] In low-light conditions, the control circuit 10 supplies voltage to the gate of the second thin-film transistor T2 through its output terminal 11, thereby adjusting the conduction level of the second thin-film transistor T2. This reduces the resistance of the adjustable resistor R2, which is equivalent to the second thin-film transistor T2, and consequently reduces the total resistance of the first thin-film transistor T1 and the second thin-film transistor T2, causing the first current to increase and become the third current. Furthermore, the voltage acquisition terminal 12 of the control circuit 10 calculates the acquired third voltage based on the third current, which is greater than the first voltage. Thus, in low-light conditions, this application can increase the current in the equivalent series circuit, thereby reducing the resistance of the adjustable resistor R2, which is equivalent to the second thin-film transistor T2, ensuring that the voltage acquired by the voltage acquisition terminal does not fall below the measurement range, thereby improving the local display capability of the display panel in low-light environments.

[0033] Therefore, this application enables the adaptive adjustment of the conduction level of the second thin-film transistor T2 according to different external illumination conditions, thereby adjusting the equivalent resistance value of the second thin-film transistor T2. This ensures that the voltage collected by the voltage acquisition terminal remains within the range, reducing the adjustment deviation of the brightness value. Consequently, it enhances the local display capability and detail performance of the display panel in low-illuminance environments, and reduces the risk of overexposure in high-illuminance environments, thus improving the display effect of the display panel.

[0034] In some embodiments, Figure 4 This is a schematic diagram of the structure of another display module provided in an embodiment of this application, as shown below. Figure 4 As shown, the control circuit 10 also includes a control unit 13, a voltage acquisition unit 14, and an output unit 15.

[0035] The control unit 13 is connected to the voltage acquisition unit 14 and the output unit 15. The voltage acquisition unit 14 is connected to the voltage acquisition terminal 12, and the output unit 15 is connected to the output terminal 11.

[0036] The voltage acquisition unit 14 is used to acquire the voltage of the first node A.

[0037] The control unit 13 is used to determine the current illuminance value of the display module based on the voltage of the first node A, and to determine the current working mode of the display module based on the comparison result between the current illuminance value and the illuminance threshold.

[0038] The output unit 15 is used to output a voltage signal to the second thin-film transistor T2 according to the current operating mode, so as to adjust the resistance value of the second thin-film transistor T2.

[0039] The current working mode is one of the first working mode and the second working mode.

[0040] For example, the second operating mode is the operating mode of the display module in both high-illuminance and low-illuminance environments, while the first operating mode is the operating mode of the display module in a normal-illuminance environment. The illuminance value in the high-illuminance environment is greater than the illuminance value in the normal-illuminance environment, and the illuminance value in the normal-illuminance environment is greater than the illuminance value in the low-illuminance environment.

[0041] The voltage acquisition unit 14 acquires the voltage of the first node A and provides it to the control unit 13. The control unit 13 converts the received analog voltage signal into a digital signal to obtain the voltage data value corresponding to the acquired voltage. Then, based on the correspondence between the voltage data value and the current illuminance value, it determines the current illuminance value corresponding to the voltage of the first node A. The current illuminance value is then compared with an illuminance threshold to determine whether the ambient illuminance of the display module is high illuminance, low illuminance, or normal illuminance. Finally, the control unit determines whether the current operating mode of the display module is the first operating mode or the second operating mode based on the current working environment of the display module.

[0042] Output unit 15 is used to output a voltage signal to the second thin-film transistor T2 according to the current operating mode, thereby adjusting the conduction level of the second thin-film transistor T2 and thus adjusting the resistance value of the second thin-film transistor T2. For example, when the current operating mode is the first operating mode, output unit 15 continuously outputs a voltage signal that is stable within a certain voltage range, so that the conduction level of the second thin-film transistor T2 is stable, and thus the resistance value of the adjustable resistor R2, which is equivalent to the second thin-film transistor T2, is stable within a certain resistance range.

[0043] When the current operating mode is the second operating mode and the system operates in a high-illuminance environment, the voltage signal output by the output unit 15 reduces the conduction level of the second thin-film transistor T2, thereby increasing the resistance value of the adjustable resistor R2, which is equivalent to the second thin-film transistor T2. When the current operating mode is the second operating mode and the system operates in a low-illuminance environment, the voltage signal output by the output unit 15 increases the conduction level of the second thin-film transistor T2, thereby reducing the resistance value of the adjustable resistor R2, which is equivalent to the second thin-film transistor T2.

[0044] Therefore, this application enables the adaptive adjustment of the conduction level of the second thin-film transistor T2 according to different external illumination conditions, thereby adjusting the equivalent resistance value of the second thin-film transistor T2. This ensures that the voltage collected by the voltage acquisition terminal remains within the range, reducing the adjustment deviation of the brightness value. Consequently, it enhances the local display capability and detail performance of the display panel in low-illuminance environments, and reduces the risk of overexposure in high-illuminance environments, thus improving the display effect of the display panel.

[0045] Furthermore, the first thin-film transistor T1 changes its conduction level according to the ambient illuminance, causing the current flowing through the first thin-film transistor T1 to change, thereby causing the voltage collected by the control unit from the first node A to change. The control unit 13 then adjusts the voltage signal output by the output unit 15 based on the voltage collected by the voltage acquisition unit 14 from the first node A. The second thin-film transistor T2 then adjusts its conduction level according to the received voltage signal, thereby causing the voltage of the first node A to change. Thus, this application constitutes a closed-loop regulation circuit, which can improve the response speed and accuracy of the display module to changes in ambient illuminance.

[0046] In some embodiments, the illuminance threshold includes a first illuminance threshold and a second illuminance threshold, and the second operating mode includes a first sub-operating mode and a second sub-operating mode.

[0047] The control unit 13 is used to determine the current working mode as a first sub-working mode based on the current illuminance value being less than a first illuminance threshold; or, the control unit is used to determine the current working mode as a second sub-working mode based on the current illuminance value being greater than a second illuminance threshold; wherein the first illuminance threshold is less than the second illuminance threshold.

[0048] For example, the first sub-working mode is the working mode of the display module in a low-light environment, and the second sub-working mode is the working mode of the display module in a high-light environment.

[0049] The control unit 13 compares the current illuminance value with the first illuminance threshold and the second illuminance threshold to determine whether the current working environment of the display module is high illuminance or low illuminance.

[0050] When the current illuminance value is less than the first illuminance threshold, the control unit 13 determines that the display module is operating in a low-illuminance environment, and the current operating mode is the first sub-operating mode. When the current illuminance value is greater than the second illuminance threshold, the control unit 13 determines that the display module is operating in a high-illuminance environment, and the current operating mode is the second sub-operating mode. This application compares the acquired current illuminance value with the first and second illuminance thresholds to determine the current operating environment of the display module. Based on the high-illuminance and low-illuminance environments of the display module, two different operating modes are set respectively. This allows for adjustment of the equivalent resistance value of the second thin-film transistor T2 according to the different operating environments of the display module, ensuring that the voltage acquired by the voltage acquisition terminal remains within the range, reducing the adjustment deviation of the brightness value, and improving the display effect of the display panel.

[0051] In some embodiments, the control unit 13 is configured to determine the current working mode as the first working mode based on the condition that the current illuminance value is greater than the first illuminance threshold and less than the second illuminance threshold.

[0052] For example, when the current illuminance value is less than the second illuminance threshold and greater than the first illuminance threshold, the control unit 13 determines that the display module is operating in a normal illuminance environment, and the current operating mode is the first operating mode. Therefore, this application can clearly define the illuminance range of the display module in a normal illuminance environment, so that the display module will not excessively output control signals to adjust the equivalent resistance value of the second thin-film transistor T2 in a normal illuminance environment, thereby reducing the power consumption of the display module in a normal illuminance environment.

[0053] In some embodiments, the control unit 13 is configured to acquire voltage data values ​​based on the voltage of the first node in a first operating mode and a second operating mode, and calculate the current illuminance value of the display module using an illuminance calculation formula based on the voltage data values.

[0054] For example, the voltage acquisition unit 14 acquires the voltage of the first node A and provides it to the control unit 13. The control unit 13 converts the received voltage, which is an analog signal, into a digital signal to obtain the voltage data value corresponding to the acquired voltage. Then, based on the correspondence between the voltage data value and the current illuminance value, i.e., the illuminance calculation formula, it calculates the current illuminance value corresponding to the voltage of the first node A. Furthermore, since the control unit 13 uses the illuminance calculation formula to calculate the current illuminance value of the display module in both the first and second operating modes, the same illuminance calculation formula is used to calculate the current illuminance value of the display module regardless of whether the display module is operating in a normal illuminance environment, a high illuminance environment, or a low illuminance environment. Therefore, the uniformity of the current illuminance value of the display module under any illuminance environment can be improved. Moreover, using the illuminance calculation formula can accurately quantify the ambient illuminance of the display module based on the voltage at the first node A, thereby providing a reliable basis for the mode determination of the display module and the closed-loop adjustment of the conduction level of the second thin-film transistor T2.

[0055] In some embodiments, the illuminance calculation formula is: Where lux is the current illuminance value, R is the voltage data value, and a, b, c, d, and e are all calculation constants.

[0056] For example, when the display module is in debugging mode, the illuminance of the environment in which the display module is located is adjusted, and the voltage data values ​​corresponding to multiple first nodes A, as well as the current illuminance value of the display module, are obtained. The current illuminance value of the display module can be collected by a lux meter. Based on the known multiple voltage data values ​​and the corresponding current illuminance value, multiple equations about calculation constants can be listed, and then the specific values ​​of a, b, c, d, and e can be calculated. Since the specific values ​​of a, b, c, d, and e are calculated after the display module is debugged in the actual illuminance environment, the display module can accurately correspond to the current illuminance value obtained by using the illuminance calculation formula in actual applications. This improves the accuracy of adjusting the equivalent resistance value of the second thin-film transistor T2, further reduces the adjustment deviation of the brightness value, and further improves the display effect of the display panel.

[0057] In some embodiments, the illuminance calculation formula includes a first illuminance calculation formula and a second illuminance calculation formula; The control unit is used to, in a debugging state, acquire multiple first voltage data values ​​corresponding to multiple illuminance values ​​of the display module under a first operating mode, acquire a first illuminance calculation formula corresponding to the first operating mode based on the multiple first voltage data values, and acquire multiple second voltage data values ​​corresponding to multiple illuminance values ​​of the display module under a second operating mode, acquire a second illuminance calculation formula corresponding to the second operating mode based on the multiple second voltage data values.

[0058] For example, when the display module is in debugging mode, the illuminance value of the display module under normal illumination conditions is adjusted. This allows the control unit to acquire multiple first voltage data values ​​corresponding to multiple illuminance values ​​of the display module under normal illumination conditions, as well as multiple illuminance values ​​of the display module under normal illumination conditions. Based on the known multiple first voltage data values ​​and their corresponding illuminance values, multiple equations concerning calculation constants can be listed, thereby enabling the calculation of specific values ​​for a, b, c, d, and e. This allows the acquisition of the first illuminance calculation formula corresponding to the display module in the first operating mode.

[0059] With the display module in debugging mode, the illuminance value of the display module in a high-illuminance environment is adjusted. This allows the control unit to acquire multiple second voltage data values ​​corresponding to multiple illuminance values ​​of the display module in a high-illuminance environment, as well as multiple illuminance values ​​of the display module in a high-illuminance environment. Based on the known multiple second voltage data values ​​and their corresponding illuminance values, multiple equations concerning calculation constants can be established, thereby enabling the calculation of the specific values ​​of a, b, c, d, and e. This allows the acquisition of the second illuminance calculation formula for the display module in the second operating mode under high-illuminance conditions.

[0060] With the display module in debugging mode, the illuminance value of the display module in a low-light environment is adjusted. This allows the control unit to acquire multiple second voltage data values ​​corresponding to multiple illuminance values ​​of the display module in a low-light environment, as well as multiple illuminance values ​​of the display module in a low-light environment. Based on the known multiple second voltage data values ​​and their corresponding illuminance values, multiple equations concerning calculation constants can be established, thereby calculating the specific values ​​of a, b, c, d, and e. This allows us to obtain the second illuminance calculation formula for the display module in the second operating mode and in a low-light environment.

[0061] Since the specific values ​​of a, b, c, d, and e are calculated by the display module after being adjusted under actual illumination conditions, the display module can accurately correspond to the current illumination value when using the illumination calculation formula in actual applications. This improves the accuracy of adjusting the equivalent resistance of the second thin-film transistor T2, further reduces the adjustment deviation of the brightness value, and further improves the display effect of the display panel.

[0062] In some embodiments, in the first sub-operating mode of the display module, the output terminal 11 outputs a first voltage signal to the gate of the second thin film transistor T2, and the backlight component of the display module adjusts the luminous brightness based on the first illuminance curve.

[0063] For example, in a low-light environment, the display module operates in a first sub-operating mode. Output terminal 11 outputs a first voltage signal to the gate of the second thin-film transistor T2, thereby reducing the conduction level of the second thin-film transistor T2 compared to its conduction level under normal lighting conditions. This increases the equivalent resistance of the second thin-film transistor T2, which is then set to the first equivalent resistance value. At this time, the backlight component in the display module adjusts the brightness of the display panel based on a first illuminance curve, which is the illuminance change curve corresponding to the second thin-film transistor T2 using the first equivalent resistance value.

[0064] In the second sub-operating mode of the display module, the output terminal 11 outputs a second voltage signal to the gate of the second thin film transistor T2, and the backlight component of the display module adjusts the luminous brightness based on the second illuminance curve.

[0065] For example, in a high-illuminance environment, the display module operates in a second sub-operating mode. Output terminal 11 outputs a second voltage signal to the gate of the second thin-film transistor T2, thereby increasing the conduction level of the second thin-film transistor T2 compared to its conduction level under normal illuminance conditions. This reduces the equivalent resistance value of the second thin-film transistor T2, which is then set to the second equivalent resistance value. At this time, the backlight component in the display module adjusts the brightness of the display panel based on a second illuminance curve, which is the illuminance change curve corresponding to the second thin-film transistor T2 using the second equivalent resistance value.

[0066] When the display module operates in the first sub-operating mode, i.e., in a low-light environment, the backlight component in the display module adjusts the luminous brightness of the display panel based on a first illuminance curve. When the display module operates in the second sub-operating mode, i.e., in a high-light environment, the backlight component adjusts the luminous brightness of the display panel based on a second illuminance curve. This application can adjust the luminous brightness using a pre-set illuminance curve under different illuminance environments. Using the first illuminance curve to adjust the luminous brightness of the display panel in a low-light environment can improve the local display capability and detail performance of the display panel. Furthermore, using the second illuminance curve to adjust the luminous brightness of the display panel in a high-light environment can reduce the risk of overexposure problems on the display panel, thereby improving the display effect.

[0067] In some embodiments, in the first operating mode of the display module, the output terminal 11 outputs a third voltage signal to the gate of the second thin-film transistor, and the backlight component of the display module adjusts the luminous brightness based on the third illuminance curve.

[0068] For example, under normal illumination conditions, the display module operates in a first operating mode. Output terminal 11 outputs a third voltage signal to the gate of the second thin-film transistor T2. This third voltage signal is stabilized within a certain voltage range, thereby stabilizing the conduction level of the second thin-film transistor T2 and consequently stabilizing its equivalent resistance value within a certain resistance range. The equivalent resistance value of the second thin-film transistor T2 is the third equivalent resistance value. At this time, the backlight component in the display module adjusts the brightness of the display panel based on a third illuminance curve, which is the illuminance change curve corresponding to the third equivalent resistance value of the second thin-film transistor T2.

[0069] When the display module operates in its first working mode, i.e., under normal illumination conditions, the backlight component in the display module adjusts the brightness of the display panel based on a third illuminance curve. This application enables the display module to adjust brightness using a pre-set illuminance curve under different illumination environments. In normal illumination environments between low and high illumination environments, the third illuminance curve is used. This allows the display module to transition smoothly between low and high illumination environments using the third illuminance curve, or to switch between low and normal illumination environments using a third illuminance curve that is closer to the brightness of the first illuminance curve. Similarly, when switching between normal and high illumination environments, the second illuminance curve can be used to switch with the third illuminance curve, which is also closer to the brightness of the third illuminance curve. Therefore, this application allows for smoother brightness adjustment of the display panel when switching between different lighting environments, thereby improving the display panel's display effect.

[0070] In some embodiments, Figure 5 This is a schematic diagram of the structure of another display module provided in an embodiment of this application, as shown below. Figure 5 As shown, both the control circuit 10 and the drive circuit 20 are located in the non-display area 31 of the display panel.

[0071] For example, the display panel includes a display area 32 and a non-display area 31. The control circuit 10 and the driving circuit 20 are both located in the non-display area 31 of the display panel, which is beneficial for the narrow bezel design of the display panel. Furthermore, the control circuit 10 can be a driving chip disposed on a flexible printed circuit board (FPC). When the FPC is bonded to the display panel, the driving chip is connected to the driving circuit 20. The driving circuit 20 includes a first thin-film transistor T1 and a second thin-film transistor T2, which can be fabricated together during the fabrication of the individual transistors in the non-display area 31.

[0072] This application also provides a display panel. Figure 6 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application, such as... Figure 6 As shown, the display panel 100 provided in this application embodiment may include a pixel driving circuit and the display module described in any of the above embodiments. Figure 6 The display panel shown can be an organic light-emitting diode (OLED) display panel.

[0073] Those skilled in the art should understand that in other implementations of this application, the display panel may also be a micro light-emitting diode (Micro LED) display panel, a quantum dot display panel, etc.

[0074] The display panel provided in this application embodiment has the same beneficial effects as the display module provided in this application embodiment. For details, please refer to the specific descriptions of the display module in the above embodiments. This embodiment will not repeat them here.

[0075] This application also provides a display device, including the display module provided in this application. Please refer to... Figure 7 , Figure 7 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. Figure 7 The provided display device 1000 includes the display panel 100 provided in any of the above embodiments of this application. Figure 7 This embodiment uses a mobile phone as an example to illustrate the display device 1000. It is understood that the display device provided in this application embodiment can be other display devices with display functions, such as wearable products, computers, televisions, and in-vehicle display devices; this application does not impose specific limitations on these. The display device provided in this application embodiment has the same beneficial effects as the display panel provided in this application embodiment, and will not be described again in this embodiment.

[0076] The embodiments described above are not exhaustive, nor do they limit the application to the specific embodiments described herein. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to effectively utilize this application and its modifications. This application is limited only by the claims and their full scope and equivalents.

Claims

1. A display module, characterized in that, include: The driving circuit includes a first thin-film transistor and a second thin-film transistor; The second thin-film transistor is electrically connected to the first thin-film transistor at the first node; The control circuit includes an output terminal and a voltage acquisition terminal; the output terminal is electrically connected to the control terminal of the second thin-film transistor, and the voltage acquisition terminal is electrically connected to the first node. The control circuit is used to adjust the resistance value of the second thin-film transistor based on the voltage of the first node.

2. The display module according to claim 1, characterized in that, The control circuit also includes a control unit, a voltage acquisition unit, and an output unit; The control unit is connected to the voltage acquisition unit and the output unit; the voltage acquisition unit is connected to the voltage acquisition terminal; and the output unit is connected to the output terminal. The voltage acquisition unit is used to acquire the voltage of the first node; The control unit is used to determine the current illuminance value of the display module based on the voltage of the first node, and to determine the current working mode of the display module based on the comparison result of the current illuminance value and the illuminance threshold. The output unit is used to output a voltage signal to the second thin-film transistor according to the current operating mode, so as to adjust the resistance value of the second thin-film transistor; The current working mode is one of the first working mode and the second working mode.

3. The display module according to claim 2, characterized in that, The illuminance threshold includes a first illuminance threshold and a second illuminance threshold, and the second working mode includes a first sub-working mode and a second sub-working mode; The control unit is used to determine the current working mode as the first sub-working mode based on the fact that the current illuminance value is less than the first illuminance threshold. Alternatively, the control unit is configured to determine the current working mode as the second sub-working mode based on the fact that the current illuminance value is greater than the second illuminance threshold. Wherein, the first illuminance threshold is less than the second illuminance threshold.

4. The display module according to claim 3, characterized in that, The control unit is used to determine the current working mode as the first working mode based on the condition that the current illuminance value is greater than the first illuminance threshold and less than the second illuminance threshold.

5. The display module according to claim 2, characterized in that, The control unit is used to acquire voltage data values ​​based on the voltage of the first node in the first working mode and the second working mode, and to calculate the current illuminance value of the display module according to the illuminance calculation formula based on the voltage data values.

6. The display module according to claim 5, characterized in that, The formula for calculating illuminance is: Where lux is the current illuminance value, R is the voltage data value, and a, b, c, d, and e are all constants.

7. The display module according to claim 5, characterized in that, The illuminance calculation formula includes a first illuminance calculation formula and a second illuminance calculation formula; The control unit is used, in debug mode, to acquire multiple first voltage data values ​​corresponding to multiple illuminance values ​​of the display module under the first operating mode, and to acquire a first illuminance calculation formula corresponding to the first operating mode based on the multiple first voltage data values. In addition, the system acquires multiple second voltage data values ​​corresponding to multiple illuminance values ​​for the display module under the second working mode, and obtains the second illuminance calculation formula corresponding to the second working mode based on the multiple second voltage data values.

8. The display module according to claim 1, characterized in that, In the first sub-operating mode of the display module, the output terminal outputs a first voltage signal to the gate of the second thin-film transistor, and the backlight component of the display module adjusts the luminous brightness based on the first illuminance curve; In the second sub-operating mode of the display module, the output terminal outputs a second voltage signal to the gate of the second thin-film transistor, and the backlight component of the display module adjusts the luminous brightness based on the second illuminance curve.

9. The display module according to claim 8, characterized in that, In the first operating mode of the display module, the output terminal outputs a third voltage signal to the gate of the second thin-film transistor, and the backlight component of the display module adjusts the luminous brightness based on the third illuminance curve.

10. The display module according to claim 1, characterized in that, Both the control circuit and the drive circuit are located in the non-display area of ​​the display panel.

11. A display device, characterized in that, Includes the display module as described in any one of claims 1-10.

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