Display unit and display unit control method and device

Abstract

The invention provides a display unit and a display unit control method and device. The display unit comprises an LED array and a mirror image circuit, wherein the mirror image circuit comprises an MOS device; the drain electrode of the MOS device is used for being electrically connected with an external positive voltage generation circuit, the source electrode of the MOS device is electrically connected with the positive electrode of an LED in the LED array, the grid electrode of the MOS device is electrically connected with an external bias voltage generation circuit, and the negative electrode of the LED is used for being electrically connected with an external negative voltage generation circuit. Through the implementation of the scheme of the invention, the MOS device is connected with the LED in series and then is connected with the positive voltage generation circuit and the negative voltage generation circuit, and the output voltage of the negative voltage generation circuit is adjustable, so that the drain-source voltage of the MOS device can be adjusted through the output voltage, the power consumption of the LED is adjusted, the dissipation power of the LED is reduced, and the service life of the LED is prolonged. And the heating condition of the display unit is effectively improved.

Description

Technical field

[0001] The present application relates to the technical field of display devices, and in particular to a display unit, a display unit control method, and a display unit control device. [Background Technology]

[0002] Micro LED (micro light-emitting diode) display units offer advantages such as high brightness, high contrast, low power consumption, and long lifespan. They can achieve full-color display using an RGB LED array. However, in practical applications, the driving method of Micro LEDs has a significant impact on their performance and power consumption.

[0003] Many current Micro LED driver solutions use a fixed voltage approach. This involves fixing the positive voltage (e.g., 1.1V) and negative voltage (e.g., -2.5V) of the LEDs, and then using the I2C bus to write the current values ​​of the RGB LEDs to achieve brightness adjustment. While this approach simplifies driver circuit design, the fixed voltage across the LEDs prevents dynamic voltage adjustment to optimize power consumption. As the current increases, the power dissipation of the RGB LEDs increases significantly, causing severe overheating in the display unit and impacting the system's thermal design and stability.

[0004] Therefore, it is necessary to improve the driving method of Micro LED to reduce the heat dissipation of the Micro LED array. [Summary of the invention]

[0005] The main purpose of this application is to provide a display unit, a display unit control method and a device, which can at least solve the problem of large heat dissipation of Micro LED when the brightness is increased in the related art.

[0006] To achieve the above-mentioned objectives, the present application provides, in a first aspect, a display unit, comprising: an LED array and a mirror circuit, the mirror circuit comprising a MOS device; the drain of the MOS device being electrically connected to an external positive voltage generating circuit, the source of the MOS device being electrically connected to the positive electrode of an LED in the LED array, the gate of the MOS device being electrically connected to an external bias voltage generating circuit, and the cathode of the LED being electrically connected to an external negative voltage generating circuit; the output voltage of the negative voltage generating circuit being adjustable, the output voltage being used to adjust the drain-source voltage of the MOS device, and the drain-source voltage being used to adjust the power consumption of the LED.

[0007] The second aspect of the present application provides a display unit control method, which is applied to the display unit described in the first aspect of the present application. The display unit control method includes: obtaining a target adjustment voltage value indicated by a power consumption adjustment instruction; wherein the target adjustment voltage value corresponds to the drain-source voltage of the MOS device; according to the target adjustment voltage value, controlling the negative voltage generation circuit to generate a voltage signal of the corresponding negative voltage value, and transmitting it to the LED; the voltage signal is used to adjust the current drain-source voltage value of the MOS device to the target adjustment voltage value to reduce the power consumption of the LED.

[0008] The third aspect of the present application provides a display unit control device, which is applied to the display unit described in the first aspect of the present application. The display unit control device includes: an acquisition module, which is used to obtain a target adjustment voltage value indicated by a power consumption adjustment instruction; wherein the target adjustment voltage value corresponds to the drain-source voltage of the MOS device; a control module, which is used to control the negative voltage generation circuit to generate a voltage signal of a corresponding negative voltage value according to the target adjustment voltage value, and transmit it to the LED; the voltage signal is used to adjust the current drain-source voltage value of the MOS device to the target adjustment voltage value to reduce the power consumption of the LED.

[0009] As can be seen from the above, according to the display unit, display unit control method, and device provided by the present application, a target adjustment voltage value indicated by the power consumption adjustment instruction is obtained; wherein the target adjustment voltage value corresponds to the drain-source voltage of the MOS device; according to the target adjustment voltage value, a negative voltage generation circuit is controlled to generate a voltage signal of a corresponding negative voltage value, and transmitted to the LED; the voltage signal is used to adjust the current drain-source voltage value of the MOS device to the target adjustment voltage value, so as to reduce the power consumption of the LED. Through the implementation of the present application, after the MOS device and the LED are connected in series, they are respectively connected to the positive voltage generation circuit and the negative voltage generation circuit. Since the output voltage of the negative voltage generation circuit is adjustable, the drain-source voltage of the MOS device can be adjusted by the output voltage, thereby adjusting the power consumption of the LED, reducing the power dissipation of the LED, and effectively improving the heating condition of the display unit.

Brief Description of the Drawings

[0010] In order to more clearly illustrate the embodiments of the present invention 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 invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0011] Figure 1 A schematic structural diagram of a display unit provided in one embodiment of the present application;

[0012] Figure 2A schematic diagram of the basic flow of a display unit control method provided in one embodiment of the present application;

[0013] Figure 3 A graph showing an operating characteristic curve of a MOS device provided in one embodiment of the present application;

[0014] Figure 4 A schematic diagram of a detailed flow chart of a display unit control method provided in one embodiment of the present application;

[0015] Figure 5 A schematic structural diagram of a display unit control device provided in one embodiment of the present application;

[0016] Figure 6 A schematic structural diagram of an electronic device provided in one embodiment of the present application. [Specific implementation method]

[0017] In order to make the purpose, features, and advantages of the invention of this application more obvious and easy to understand, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0018] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, the meaning of "plurality" is two or more, unless otherwise clearly specified.

[0019] In order to solve the problem in the related art that the voltage of Micro LED is fixed, resulting in large heat dissipation when the brightness is increased, an embodiment of the present application provides a display unit.

[0020] like Figure 1 This is a schematic structural diagram of a display unit provided in this embodiment. The display unit includes: an LED array 10 and a mirror circuit 20. The mirror circuit 20 includes a MOS device. The drain of the MOS device is electrically connected to an external positive voltage generating circuit 30. The source of the MOS device is electrically connected to the anode of the LED in the LED array 10. The gate of the MOS device is electrically connected to an external bias voltage generating circuit 40. The cathode of the LED is electrically connected to an external negative voltage generating circuit 50. The output voltage of the negative voltage generating circuit 50 is adjustable. The output voltage is used to adjust the drain-source voltage of the MOS device. The drain-source voltage is used to adjust the power consumption of the LED.

[0021] Specifically, in this embodiment, the LED array 10 in the display unit can be an array structure composed of a large number of micro LEDs arranged in a certain manner, and each micro LED can be controlled individually, thereby achieving high-resolution display or precise light control. The mirror circuit 20 can achieve precise current distribution among multiple LEDs, ensuring that each LED obtains the same current and ensuring consistent brightness. The mirror circuit 20 includes a MOS device, the drain of the MOS device is connected to the positive voltage generating circuit 30, the source of the MOS device is connected to the positive electrode of the LED, and the negative electrode of the LED is connected to the negative voltage generating circuit 50. The MOS device is connected in series with the LED and then connected to the positive voltage generating circuit 30 and the negative voltage generating circuit 50 respectively, wherein the output voltage of the negative voltage generating circuit 50 is adjustable, and the voltage difference between the two ends of the LED can be adjusted by adjusting the output voltage to achieve the adjustment of the LED power consumption, that is, by changing the drain-source voltage V of the MOS device. DS , thereby reducing LED power consumption. Compared to the fixed voltage across the LEDs in related art, the power consumption of the LEDs in this embodiment can be optimized based on a dynamic voltage. The number of MOS devices in this embodiment can be designed as needed, for example, multiple LEDs can share a single MOS device or there can be a one-to-one correspondence between LEDs and MOS devices, to ensure that the voltage across the LEDs in the LED array 10 can be adjusted in a timely manner.

[0022] The present application also provides a display unit control method, which is applied to the above display unit, such as Figure 2 This is a basic flow chart of the display unit control method provided in this embodiment. The display unit control method includes the following steps:

[0023] Step 201: Obtain a target adjustment voltage value indicated by a power consumption adjustment instruction.

[0024] Specifically, in this embodiment, when it is necessary to optimize the power consumption of the display unit, the desired adjustment amplitude of the drain-source voltage of the MOS device can be obtained from the power consumption adjustment instruction, so as to control the display unit based on the target adjustment voltage value. The power consumption adjustment instruction can be a user-entered instruction or an adjustment instruction automatically generated by the device under certain conditions.

[0025] In some implementations of this embodiment, obtaining the target adjustment voltage value indicated by the power consumption adjustment instruction includes: obtaining the target LED brightness level indicated by the power consumption adjustment instruction; and determining the target adjustment voltage value according to the target LED brightness level.

[0026] Specifically, in this embodiment, the power consumption adjustment instruction can indicate that the current brightness needs to be adjusted. A correspondence between the LED brightness level and the drain-source voltage of the MOS device can be preset. When the display unit's power consumption needs to be optimized, the voltage amplitude that needs to be adjusted can be determined based on the target LED brightness level, facilitating rapid reduction of power consumption to an appropriate value. The power consumption adjustment instruction can be an adjustment instruction input by the user based on real-time needs, a brightness adjustment instruction set at a fixed time, or a power consumption adjustment instruction automatically generated when certain conditions are met.

[0027] Furthermore, in some implementations of this embodiment, before obtaining the LED brightness level indicated by the power consumption adjustment instruction, it also includes: if the brightness value of the ambient light is less than or equal to the preset brightness threshold, determining the target LED brightness level based on the brightness value; and generating the power consumption adjustment instruction based on the target LED brightness level.

[0028] Specifically, in this embodiment, the power consumption adjustment instruction can be automatically generated based on ambient light brightness information collected by an environmental sensor, for example. For example, when the ambient light brightness value is less than or equal to a preset brightness threshold, it is determined that the brightness can be reduced to reduce the power consumption of the display unit. After determining the current ambient brightness value, the LED brightness level corresponding to this brightness value can be determined as the target LED brightness level. The LED brightness level corresponding to this brightness value can be the next brightness level below the current LED brightness level. After determining the target LED brightness level, the power consumption adjustment instruction can be generated based on the target brightness level.

[0029] Step 202: According to the target adjustment voltage value, the negative voltage generating circuit is controlled to generate a voltage signal of a corresponding negative voltage value, and the voltage signal is transmitted to the LED.

[0030] In this embodiment, LED power consumption is regulated by dynamically adjusting the drain-source voltage of the MOS device. The drain-source voltage of the MOS device is the voltage across the positive voltage AVDD and the negative voltage AVEE. When the positive voltage is fixed, the drain-source voltage of the MOS device can be adjusted by dynamically adjusting the negative voltage. Since LED power consumption is the product of the drain-source voltage of the MOS device and the current it generates, reducing the drain-source voltage of the MOS device can save a certain amount of LED power consumption.

[0031] In some implementations of this embodiment, before controlling the negative voltage generating circuit to generate a voltage signal of a corresponding negative voltage value, it also includes: detecting the current working characteristic type of the MOS device; when the working characteristic type is a saturation characteristic, executing the control of the negative voltage generating circuit to generate a voltage signal of a corresponding negative voltage value.

[0032] Specifically, in this embodiment, since the MOS device is connected in series with the LED, the brightness of the LED is linearly correlated with the current generated by the drain-source voltage of the MOS device, that is, the brightness of the LED is linearly correlated with the leakage current I D There is a linear relationship, and each current value corresponds to a brightness. In order to ensure that the power consumption of the LED is reduced while avoiding excessive brightness loss, the MOS device can be controlled to operate in the saturation region. Therefore, the operating characteristic type of the MOS device can be detected before adjustment. If the MOS device is in the saturation region, the drain-source voltage can be adjusted. If the MOS device is not in the saturation region, its drain-source voltage can be adjusted to ensure that the MOS device enters the saturation region. Figure 3 The working characteristic curve of the MOS device shown in the figure shows that when the MOS device connected in series with the LED works in the saturation region (i.e. Figure 3 In the flat area of ​​the middle curve), the gate-source voltage V GS unchanged, leakage current I D Basically unchanged. Therefore, the drain-source voltage V DS When the leakage current I D Fixed, thus ensuring that the LED power consumption is reduced and the brightness loss is small. Figure 3 V in DS1 =3V, V GS =3.5V, by reducing the voltage value of the negative voltage |AVEE|, the drain-source voltage V DS , so that the first working point moves to V DS2 =2V, V GS =3.5V, the second operating point can save power (|AVEE1|-|AVEE2|)×I D (That is, (V DS1 -V DS2 )×I D ). Here, |AVEE1| corresponds to the first operating point, i.e., the absolute value of the output voltage of the negative voltage generating circuit when the negative voltage generating circuit is not adjusted according to the target adjustment voltage value, and |AVEE2| corresponds to the second operating point, i.e., the absolute value of the output voltage of the negative voltage generating circuit when the negative voltage generating circuit is adjusted according to the target adjustment voltage value. In this embodiment, the voltage value of the negative voltage AVEE can be set in the form of gears. For example, the negative voltage is set to four gears, ranging from -0.8 to -4V, corresponding to low brightness levels to high brightness levels, which facilitates setting and searching the corresponding relationship between brightness levels and negative voltage values.

[0033] Furthermore, in some implementations of this embodiment, the negative voltage generating circuit includes a DC-DC conversion circuit, and controlling the negative voltage generating circuit to generate a voltage signal of a corresponding negative voltage value includes: determining a characteristic parameter value of a driving signal of the DC-DC conversion circuit according to a target adjustment voltage value; wherein the characteristic parameter includes a duty cycle; and generating a corresponding target driving signal according to the characteristic parameter value and transmitting it to the DC-DC conversion circuit; wherein the target driving signal is used to control the DC-DC conversion circuit to generate a voltage signal of a corresponding negative voltage value.

[0034] Specifically, in this embodiment, the negative voltage generating circuit can be a DC-DC conversion circuit for converting the power supply voltage into a DC voltage of a preset value. Specifically, the characteristic parameters such as the duty cycle and switching frequency of its driving signal can be determined according to the voltage amplitude to be adjusted. Taking the duty cycle as an example, when it is necessary to reduce the output voltage of the DC-DC conversion circuit, the duty cycle of its driving signal can be increased for a step-down DC-DC converter, and vice versa. Thus, by determining the characteristic parameter values ​​of the DC-DC conversion circuit, a target driving signal can be generated to achieve negative voltage regulation. The output voltage range of the negative voltage generating circuit in this embodiment is [-0.4, -0.8].

[0035] Based on the above technical solution of the embodiment of the present application, a target adjustment voltage value indicated by a power consumption adjustment instruction is obtained; wherein the target adjustment voltage value corresponds to the drain-source voltage of the MOS device; based on the target adjustment voltage value, a negative voltage generation circuit is controlled to generate a voltage signal of a corresponding negative voltage value and transmit it to the LED; the voltage signal is used to adjust the current drain-source voltage value of the MOS device to the target adjustment voltage value to reduce the power consumption of the LED. Through the implementation of the solution of the present application, the MOS device and the LED are connected in series, and then respectively connected to the positive voltage generation circuit and the negative voltage generation circuit. Since the output voltage of the negative voltage generation circuit is adjustable, the drain-source voltage of the MOS device can be adjusted through the output voltage, thereby adjusting the power consumption of the LED, reducing the power dissipation of the LED, and effectively improving the heating condition of the display unit.

[0036] Figure 4 The method in is a detailed display unit control method provided in an embodiment of the present application, and the display unit control method includes:

[0037] Step 401: Obtain the target LED brightness level indicated by the power consumption adjustment instruction;

[0038] Step 402: Determine a target adjustment voltage value according to the target LED brightness level;

[0039] Step 403: Detect the current operating characteristic type of the MOS device;

[0040] Step 404: When the operating characteristic type is a saturation characteristic, determine a characteristic parameter value of a driving signal of the DC-DC conversion circuit according to the target adjustment voltage value;

[0041] Step 405: Generate a corresponding target driving signal according to the characteristic parameter value and transmit it to the DC-DC conversion circuit to control the DC-DC conversion circuit to generate a voltage signal with a corresponding negative voltage value to the LED cathode, thereby reducing the power consumption of the LED.

[0042] Specifically, in this embodiment, the power consumption adjustment instruction can indicate that the current brightness needs to be adjusted. A correspondence between the LED brightness level and the drain-source voltage of the MOS device can be preset. When the display unit's power consumption needs to be optimized, the voltage amplitude that needs to be adjusted can be determined based on the target LED brightness level, facilitating rapid reduction of power consumption to an appropriate value. The power consumption adjustment instruction can be an adjustment instruction input by the user based on real-time needs, a brightness adjustment instruction set at a fixed time, or a power consumption adjustment instruction automatically generated when certain conditions are met.

[0043] Since the MOS device is connected in series with the LED, the brightness of the LED is linearly related to the current generated by the drain-source voltage of the MOS device, that is, the brightness of the LED is linearly related to the leakage current I D There is a linear relationship, and each current value corresponds to a brightness. In order to ensure that the power consumption of the LED is reduced while avoiding excessive brightness loss, you can choose to control the MOS device to work in the saturation area. Therefore, the working characteristic type of the MOS device can be detected before adjustment. If the MOS device is in the saturation area, the drain-source voltage can be adjusted. If the MOS device is not in the saturation area, you can ensure that the MOS device enters the saturation area by adjusting its drain-source voltage. LED power consumption adjustment is achieved by dynamically adjusting the drain-source voltage of the MOS device, and the drain-source voltage of the MOS device is the cross-voltage between the positive voltage AVDD and the negative voltage AVEE. When the positive voltage is fixed (the value of the positive voltage can be any value from 0.95 to 1.26), the drain-source voltage of the MOS device can be adjusted by dynamically adjusting the value of the negative voltage. Thus, when the brightness of the LED is such as Figure 3 V in DS1 =3V, V GS =3.5V, and by reducing the voltage value of the negative voltage |AVEE|, the first operating point is moved to V DS2 =2V, V GS =3.5V, the second operating point can save power (|AVEE1|-|AVEE2|)×I D, |AVEE1| corresponds to the first operating point, and |AVEE2| corresponds to the second operating point. In this embodiment, the voltage value of the negative voltage AVEE can be set in the form of gears. For example, four gears are set for the negative voltage, ranging from -0.8 to -4V, corresponding to low brightness levels to high brightness levels, which facilitates setting and finding the corresponding relationship between brightness levels and negative voltage values.

[0044] It should be understood that the size of the serial numbers of the steps in this embodiment does not mean the order in which the steps are executed. The order in which the steps are executed should be determined by their functions and internal logic, and should not constitute a sole limitation on the implementation process of the embodiments of this application.

[0045] Based on the above technical solution of the embodiment of the present application, the target adjustment voltage value of the drain-source voltage of the MOS device is determined according to the brightness level indicated by the power consumption adjustment instruction; and when the MOS device is in the saturation region, a corresponding drive signal is generated according to the target adjustment voltage value to the negative voltage generation circuit, so that the negative voltage generation circuit generates a voltage signal of the corresponding negative voltage value, thereby realizing the adjustment of the drain-source voltage of the MOS device, thereby realizing the adjustment of the LED power consumption by dynamically adjusting the negative voltage, reducing the LED dissipated power, and thereby improving the heating condition of the display unit.

[0046] Figure 5 A display unit control device provided in one embodiment of the present application is applied to the above-mentioned display unit. The display unit control device mainly includes:

[0047] An acquisition module 501 is configured to acquire a target adjustment voltage value indicated by a power consumption adjustment instruction; wherein the target adjustment voltage value corresponds to a drain-source voltage of a MOS device;

[0048] The control module 502 is used to control the negative voltage generation circuit to generate a voltage signal of a corresponding negative voltage value according to the target adjustment voltage value, and transmit it to the LED; the voltage signal is used to adjust the current drain-source voltage value of the MOS device to the target adjustment voltage value to reduce the power consumption of the LED.

[0049] In some implementations of this embodiment, the negative voltage generating circuit includes a DC-DC conversion circuit, and the control module is specifically used to: determine the characteristic parameter value of the drive signal of the DC-DC conversion circuit according to the target adjustment voltage value; wherein the characteristic parameter includes the duty cycle; according to the characteristic parameter value, generate a corresponding target drive signal and transmit it to the DC-DC conversion circuit; wherein the target drive signal is used to control the DC-DC conversion circuit to generate a voltage signal of the corresponding negative voltage value.

[0050] In some implementations of this embodiment, the acquisition module is specifically used to: acquire the target LED brightness level indicated by the power consumption adjustment instruction; and determine the target adjustment voltage value according to the target LED brightness level.

[0051] Furthermore, in some implementations of this embodiment, the display unit control device also includes a generation module for determining a target LED brightness level based on the brightness value if the brightness value of the ambient light is less than or equal to a preset brightness threshold; and generating a power consumption adjustment instruction based on the target LED brightness level.

[0052] Furthermore, in some implementations of this embodiment, the display unit control device also includes: a detection module for detecting the current working characteristic type of the MOS device; when the working characteristic type is a saturation characteristic, instructing the control module to execute the function of controlling the negative voltage generation circuit to generate a voltage signal of a corresponding negative voltage value.

[0053] It should be noted that the display unit control methods in the aforementioned embodiments can all be implemented based on the display unit control device provided in this embodiment. Ordinary technicians in the relevant field can clearly understand that for the convenience and conciseness of description, the specific working process of the display unit control device described in this embodiment can refer to the corresponding process in the aforementioned method embodiment and will not be repeated here.

[0054] Based on the technical solutions of the above-mentioned embodiments of the present application, a target adjustment voltage value indicated by a power consumption adjustment instruction is obtained; wherein the target adjustment voltage value corresponds to the drain-source voltage of the MOS device; based on the target adjustment voltage value, a negative voltage generation circuit is controlled to generate a voltage signal of a corresponding negative voltage value and transmit it to the LED; the voltage signal is used to adjust the current drain-source voltage value of the MOS device to the target adjustment voltage value to reduce the power consumption of the LED. Through the implementation of the solution of the present application, the MOS device and the LED are connected in series, and then respectively connected to the positive voltage generation circuit and the negative voltage generation circuit. Since the output voltage of the negative voltage generation circuit is adjustable, the drain-source voltage of the MOS device can be adjusted by the output voltage, thereby adjusting the power consumption of the LED, reducing the power dissipation of the LED, and effectively improving the heating of the display unit.

[0055] Figure 6 This is a schematic diagram of the structure of an electronic device provided in one embodiment of the present application. The electronic device can be used to implement the display unit control method in the aforementioned embodiment, mainly including:

[0056] Display unit 601, memory 602, processor 603, and computer program 604 stored in memory 602 and executable on processor 603. Memory 602 and processor 603 are connected via communication. When processor 603 executes computer program 604, the method in the aforementioned embodiment is implemented. The number of processors may be one or more.

[0057] The memory 602 can be a high-speed random access memory (RAM) memory or a non-volatile memory such as a disk memory. The memory 602 is used to store executable program codes. The processor 603 is coupled to the memory 602 .

[0058] Furthermore, the embodiment of the present application also provides a computer-readable storage medium, which can be set in the above electronic device. The computer-readable storage medium can be the above Figure 6 Memory in the illustrated embodiment.

[0059] The computer-readable storage medium stores a computer program that, when executed by a processor, implements the display unit control method of the aforementioned embodiment. Furthermore, the computer-readable storage medium may be a USB flash drive, a mobile hard drive, a read-only memory (ROM), RAM, a magnetic disk, or an optical disk, among other media capable of storing program code.

[0060] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of modules is only a logical function division. In actual implementation, there may be other division methods, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0061] Modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed across multiple network modules. Some or all of these modules may be selected to achieve the purpose of this embodiment based on actual needs.

[0062] In addition, the functional modules in the various embodiments of the present application may be integrated into a processing module, or each module may exist physically separately, or two or more modules may be integrated into a single module. The above-mentioned integrated modules may be implemented in the form of hardware or software functional modules.

[0063] If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a readable storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned readable storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

[0064] It should be noted that for the aforementioned method embodiments, for ease of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions and modules involved are not necessarily required by this application.

[0065] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0066] The above is a description of the display unit, display unit control method and device provided in this application. For those skilled in the art, based on the ideas of the embodiments of this application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on this application.

Claims

1. A display unit, characterized in that: include: An LED array and a mirror circuit, the mirror circuit comprising a MOS device; the drain of the MOS device being electrically connected to an external positive voltage generating circuit, the source of the MOS device being electrically connected to the anode of an LED in the LED array, the gate of the MOS device being electrically connected to an external bias voltage generating circuit, and the cathode of the LED being electrically connected to the external negative voltage generating circuit; The output voltage of the negative voltage generating circuit is adjustable, and the output voltage is used to adjust the drain-source voltage of the MOS device, and the drain-source voltage is used to adjust the power consumption of the LED.

2. A display unit control method, characterized in that: Applied to the display unit according to claim 1, the display unit control method comprises: Obtaining a target adjustment voltage value indicated by the power consumption adjustment instruction; wherein the target adjustment voltage value corresponds to a drain-source voltage of the MOS device; According to the target voltage value, the negative voltage generating circuit is controlled to generate a voltage signal of a corresponding negative voltage value and transmit the signal to the LED; The voltage signal is used to adjust the current drain-source voltage value of the MOS device to the target adjustment voltage value, so as to reduce the power consumption of the LED.

3. The display unit control method according to claim 2, wherein: The negative voltage generating circuit includes a DC-DC conversion circuit, and the negative voltage generating circuit is controlled to generate a voltage signal of a corresponding negative voltage value, including: Determining characteristic parameter values ​​of the drive signal of the DC-DC conversion circuit according to the target regulated voltage value; wherein the characteristic parameter includes a duty cycle; According to the characteristic parameter value, a corresponding target driving signal is generated and transmitted to the DC-DC conversion circuit; wherein the target driving signal is used to control the DC-DC conversion circuit to generate a voltage signal of the corresponding negative voltage value.

4. The display unit control method according to claim 2, wherein: The obtaining of the target adjustment voltage value indicated by the power consumption adjustment instruction includes: Obtain the target LED brightness level indicated by the power consumption adjustment instruction; A target adjustment voltage value is determined according to the target LED brightness level.

5. The display unit control method according to claim 4, wherein: Before obtaining the LED brightness level indicated by the power consumption adjustment instruction, the method further includes: If the brightness value of the ambient light is less than or equal to the preset brightness threshold, determining the target LED brightness level according to the brightness value; Based on the target LED brightness level, a power consumption adjustment instruction is generated.

6. The display unit control method according to any one of claims 2 to 5, characterized in that: Before the negative voltage generating circuit is controlled to generate a voltage signal of a corresponding negative voltage value, the method further includes: Detecting the current operating characteristic type of the MOS device; When the operating characteristic type is a saturation characteristic, the negative voltage generating circuit is controlled to generate a voltage signal of a corresponding negative voltage value.

7. The display unit control method according to claim 2, wherein: When the current drain-source voltage value is adjusted to the target adjustment voltage value, the power consumption saved is (|AVEE1|-|AVEE2|)×I D ; Wherein, |AVEE1| is the absolute value of the output voltage of the negative voltage generating circuit when not adjusted according to the target adjustment voltage value, |AVEE2| is the absolute value of the output voltage of the negative voltage generating circuit when adjusted according to the target adjustment voltage value, I D is the leakage current of the MOS device.

8. The display unit control method according to claim 2, wherein: The output voltage range of the negative voltage generating circuit is [-4, -0.8].

9. A display unit control device, characterized in that: Applied to the display unit according to claim 1, the display unit control device comprises: An acquisition module, configured to acquire a target adjustment voltage value indicated by a power consumption adjustment instruction; wherein the target adjustment voltage value corresponds to a drain-source voltage of a MOS device; A control module is used to control the negative voltage generation circuit to generate a voltage signal of a corresponding negative voltage value according to the target adjustment voltage value, and transmit it to the LED; the voltage signal is used to adjust the current drain-source voltage value of the MOS device to the target adjustment voltage value to reduce the power consumption of the LED.

10. The display unit control device according to claim 9, wherein: It also includes a detection module for detecting the current working characteristic type of the MOS device; when the working characteristic type is a saturation characteristic, it instructs the control module to execute the function of controlling the negative voltage generating circuit to generate a voltage signal of a corresponding negative voltage value.

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