Display device and driving method thereof

Abstract

The application discloses a display device and a driving method thereof, and belongs to the technical field of display. The display device comprises a video source interface (electrically connected to a signal source), a power supply, a timing controller and an auxiliary circuit. In a standby mode, the power supply is used for generating a first target power supply signal. In a starting mode, the video source interface is used for outputting an auxiliary voltage signal. The auxiliary circuit is used for generating a power supply starting signal according to the auxiliary voltage signal. The power supply is used for generating a second target power supply signal according to the power supply starting signal and an original power supply signal, so as to replace the control of the power supply by a system-level chip to realize the starting and standby of the display device, and the cost of the display device is reduced.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display device and its driving method. Background Technology

[0002] Existing system-on-a-chip (SoC) is relatively expensive due to its powerful functions, such as integrating controllers, display processing units, graphics processing units, central processing units, memory control and video memory, and output interface modules.

[0003] However, if the power-on and standby functions of existing LCD display devices are implemented by controlling the control signals output by the system-on-a-chip, the cost of the LCD display device will increase significantly. Summary of the Invention

[0004] A display device and its driving method are provided to solve the technical problem that the cost of a liquid crystal display device is greatly increased because the power-on and standby functions of the liquid crystal display device are controlled by a system-on-a-chip.

[0005] In a first aspect, a display device is provided, having a standby mode and a power-on mode, including: The video source interface is electrically connected to the signal source and is used to output an auxiliary voltage signal. A power supply unit is used to generate a first target power signal and a second target power signal based on the original power signal, wherein the first target power signal and the second target power signal are two constant voltage signals with different voltage values; A timing controller is electrically connected between the video source interface and the power supply. An auxiliary circuit, electrically connected between the video source interface and the power supply, is used to generate a power-on signal based on the auxiliary voltage signal. In the standby mode, the power supply is used to generate the first target power signal; In the power-on mode, the video source interface is used to output the auxiliary voltage signal, the auxiliary circuit is used to generate the power-on signal based on the auxiliary voltage signal, and the power supply is used to generate the second target power signal based on the power-on signal and the original power signal.

[0006] Optionally, the voltage value of the first target power signal is less than the voltage value of the second target power signal.

[0007] Optionally, the standby circuit in the display device is used to switch the display device to the power-on mode according to the first target power signal being in a working state in the standby mode and according to the wake-up command.

[0008] Optionally, the display device further includes: The display panel is electrically connected to the timing controller; In the power-on mode, the timing controller is used to generate a target image signal based on the second target power signal and the original image signal, and the target image signal is used to determine the display screen of the display panel.

[0009] Optionally, the power supply includes: A transformer module is used to generate the first target power signal and the second target power signal based on the original power signal; The power management module, electrically connected to the transformer module, is used to generate a third target power signal based on the second target power signal; In the power-on mode, the timing controller is used to generate the target image signal based on the third target power signal and the original image signal.

[0010] Optionally, the display device further includes: The backlight module is electrically connected to the timing controller; In the power-on mode, the timing controller is used to generate a backlight turn-on signal based on the third target power signal, and the backlight turn-on signal is used to control the backlight module to provide backlight.

[0011] Optionally, in the power-on mode, the timing controller is used to generate the backlight-on signal based on the second target power signal after receiving the original image signal.

[0012] Optionally, in the standby mode, a current disconnect is formed between the video source interface and the signal source so that the video source interface does not output the auxiliary voltage signal; In the power-on mode, a current path is formed between the video source interface and the signal source, so that the video source interface outputs the auxiliary voltage signal.

[0013] Optionally, after the formation of a current path between the video source interface and the signal source is switched to the formation of a current disconnection so that the original image signal is not transmitted to the timing controller and the video source interface does not output the auxiliary voltage signal, the timing controller is configured not to generate the backlight turn-on signal and the second target power signal, so that the display device switches from the power-on mode to the standby mode.

[0014] Optionally, the display device further includes: A source driver, electrically connected between the timing controller and the display panel, is used to generate multiple data signals based on the target image signal, and the multiple data signals are used to control the display panel to display the image.

[0015] Optionally, the auxiliary circuit includes: An operational amplifier, wherein the non-inverting input terminal of the operational amplifier is electrically connected to the output terminal of the video source interface for outputting the auxiliary voltage signal, the inverting input terminal of the operational amplifier is electrically connected to the output terminal of the operational amplifier, and the output terminal of the operational amplifier is electrically connected to the input terminal of the power supply for receiving the power-on signal.

[0016] In a second aspect, a driving method for a display device is provided, the display device including a video source interface, a power supply, a timing controller electrically connected between the video source interface and the power supply, and auxiliary circuitry, the driving method for the display device including: In standby mode, the power supply is controlled to generate a first target power signal based on the original power signal; In power-on mode, the video source interface is controlled to output an auxiliary voltage signal, the auxiliary circuit is controlled to generate a power-on signal based on the auxiliary voltage signal, and the power supply is controlled to generate a second target power signal based on the power-on signal and the original power signal. The first target power signal and the second target power signal are two constant voltage signals with different voltage values.

[0017] In this application, the display device includes a video source interface (electrically connected to a signal source), a power supply, a timing controller, and an auxiliary circuit. In standby mode, the power supply is used to generate a first target power signal. In power-on mode, the video source interface is used to output an auxiliary voltage signal. The auxiliary circuit is used to generate a power-on signal based on the auxiliary voltage signal. The power supply is used to generate a second target power signal based on the power-on signal and the original power signal. This replaces the method of controlling the power supply through a system-on-a-chip to realize the power-on and standby modes of the display device, thereby reducing the cost of the display device. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0020] Figure 1 and Figure 3 This is an architectural diagram of a display device provided for an exemplary embodiment of this disclosure.

[0021] Figure 2 A timing diagram of some signals in a display device provided as an exemplary embodiment of this disclosure.

[0022] Figure 4 This is an architectural diagram of a display device provided as an exemplary comparative example of this disclosure.

[0023] Figure 5 A flowchart of a driving method for a display device provided in an exemplary embodiment of this disclosure.

[0024] Figure 6 A block diagram of an electronic device provided as an exemplary embodiment of this disclosure. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0026] In the embodiments of this application, "at least one" refers to one or more; "multiple" refers to two or more. In the description of this application, the terms "first," "second," "third," etc., are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0027] References such as “one embodiment” or “some embodiments” as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the terms “comprising,” “including,” “having,” and variations thereof, as used in this specification, mean “including, but not limited to,” unless otherwise specifically emphasized.

[0028] It should be noted that in the embodiments of this application, "and / or" describes the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. In addition, the character " / ", unless otherwise specified, generally indicates that the associated objects before and after it are in an "or" relationship.

[0029] It should be noted that in the embodiments of this application, "connection" can be understood as electrical connection. The connection between two electrical components can be a direct or indirect connection between the two electrical components. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components.

[0030] This application provides a display device that is applied to electronic devices, including mobile phones, smartwatches, smart bracelets, smart armbands, smart ankle bracelets, smart earrings, smart rings, smart glasses, and headphones, etc. This application does not limit the scope of the application, and the display device provided by this application may include, but is not limited to, the following embodiments and combinations thereof.

[0031] In some embodiments, combined with Figures 1 to 3 As shown, the display device 100 has a standby mode and a power-on mode, and includes: a video source interface 10, electrically connected to a signal source (which may be included in the aforementioned electronic device), for outputting an auxiliary voltage signal (e.g., including at least one of a first auxiliary voltage signal aux_n and a second auxiliary voltage signal aux_p, the former being used as an example here); a power supply 20, for generating a first target power signal t_p1 and a second target power signal t_p2 based on the original power signal ac_in, wherein the first target power signal t_p1 and the second target power signal t_p2 are two constant voltage signals with different voltage values; a timing controller 30, electrically connected between the video source interface 10 and the power supply 20; and an auxiliary circuit 40, electrically connected between the video source interface 10 and the power supply 20, for outputting an auxiliary voltage signal (e.g., the first auxiliary voltage signal aux_n) based on the auxiliary voltage signal (e.g., the first auxiliary voltage signal aux_n). The power supply 20 generates a power-on signal ps_on from the first auxiliary voltage signal aux_p; in the standby mode, the power supply 20 generates the first target power signal t_p1; in the power-on mode, the video source interface 10 outputs the auxiliary voltage signal, the auxiliary circuit 40 generates the power-on signal ps_on based on the auxiliary voltage signal, and the power supply 20 generates the second target power signal t_p2 based on the power-on signal ps_on and the original power signal ac_in.

[0032] Among them, such as Figure 3As shown, the display device 100 also includes a gate driver 50 and a source driver 60 electrically connected to the timing controller 30, and a display panel 70. The display panel 70 includes a plurality of sub-pixels Pi, a plurality of data lines, and a plurality of gate lines. Each data line is electrically connected to a corresponding plurality of sub-pixels Pi, and each gate line is electrically connected to a corresponding plurality of sub-pixels Pi. Here, we take an array arrangement of multiple sub-pixels Pi as an example. Multiple sub-pixels Pi located in the same row can be electrically connected to the same gate line, and multiple sub-pixels Pi located in the same column can be electrically connected to the same data line. The display panel 70 can be a liquid crystal display panel or a self-emissive display panel. When the display panel 70 is a liquid crystal display panel 70, the emission color of the sub-pixels Pi can represent the color presented after the emission color of the backlight is superimposed with the corresponding filter. When the display panel 70 is a self-emissive display panel 70, the emission color of the sub-pixels Pi can represent the color presented by the emission of light from the self-emissive device.

[0033] The sub-pixels Pi in the aforementioned self-emissive display panel may include at least one of organic light-emitting diodes, active matrix organic light-emitting diodes, active matrix organic light-emitting diodes, flexible light-emitting diodes, and quantum dot light-emitting diodes.

[0034] The source driver 60, electrically connected to multiple data lines, generates multiple data signals (Data). The gate driver 50, electrically connected to multiple gate lines, generates multiple gate signals (Gate). The timing controller 20 can drive the source driver 60 and the gate driver 50 to operate. The gate driver 50 can be integrated into the display panel 70 or set up independently of the display panel 70. Figure 1 The former is used as an example for illustration only.

[0035] Each gate line outputs a corresponding gate signal (including a gate pulse for controlling the activation of the sub-pixels Pi in that row) to multiple sub-pixels Pi in the corresponding row. Each data line is electrically connected to output corresponding data voltages (each including multiple data voltages corresponding to the sub-pixels Pi in that column) to multiple sub-pixels Pi in the corresponding column. The multiple data signals Data corresponding to multiple columns of sub-pixels Pi are matched so that when the multiple sub-pixels Pi in the corresponding row are turned on, the corresponding multiple data voltages are transmitted to the multiple sub-pixels Pi in the corresponding row through multiple data lines respectively. In this way, multiple gate signals Gate control multiple rows of sub-pixels Pi to turn on sequentially, so as to present the corresponding brightness according to the corresponding multiple sets of data voltages to display a frame of the image.

[0036] like Figure 4 As shown in the comparative example, the participation of the system-on-a-chip 80 is required to realize the standby mode and power-on mode of the display device 100, as detailed below: When the transmitter 90 (e.g., an infrared remote control) transmits a power-on signal, the system-on-chip 80 sets the PS_ON pin to an effective potential, enabling the power supply 20 (which still receives a constant voltage signal, such as 220V, via the AC_IN pin) to start. The power supply 20 outputs a 5V and a 12V constant voltage signal to the system-on-chip 80. The display processing module in the system-on-chip 80 starts up and outputs a display signal, which is processed by the timing controller 30 and then sent to multiple sub-pixels Pi in the display panel 10. The multiple sub-pixels Pi start working. Then, the system-on-chip 80 sets the BL_ON pin to an effective potential, enabling the backlight control module of the power supply 20 to start and control the backlight strips in the display panel 10 to light up, thereby completing the power-on operation. When the transmitter 90 (e.g., an infrared remote control) transmits a power-off signal, the system-on-chip 80 sets the BL_ON pin to an invalid potential, thereby turning off the backlight control module of the power supply 20 and turning off the backlight strip in the display panel 10. Then, the system-on-chip 80 sets the PS_ON pin to an invalid potential as well, thereby turning off the power supply 20 and stopping the output of the 5V and 12V constant voltage signals. Only the 5V_SB pin remains valid. The display processing module of the system-on-chip 80 stops working, and multiple sub-pixels Pi stop working, thus completing the standby operation.

[0037] It should be noted that in the comparative example, the system-on-a-chip 80 is required to realize the standby mode and power-on mode of the display device 100. Since the system-on-a-chip 80 is relatively powerful, its cost is relatively high. Therefore, it can be considered that the cost of realizing the standby mode and power-on mode of the display device 100 in the comparative example is relatively high.

[0038] Combination Figures 1 to 3 As discussed above, in this embodiment, the video source interface 10 in the display device 100 can output an auxiliary voltage signal in the power-on mode. By setting an auxiliary circuit 40 between the video source interface 10 and the power supply 20, the auxiliary voltage signal is converted into a power-on signal ps_on, which drives the power supply 20 to generate a second target power signal t_p2 (analogous to the power supply 20 outputting a 5V constant voltage signal and a 12V constant voltage signal in the comparative example). This enables multiple sub-pixels Pi in the comparative example to start working and the backlight strip to light up, thus achieving power-on. At the same time, in the standby mode, since the video source interface 10 does not output an auxiliary voltage signal, the power supply 20 generates a first target power signal t_p1 (which can be considered as the first target power signal t_p1 setting the potentials of the BL_ON pin and the PS_ON pin in the comparative example to be invalid). This enables multiple sub-pixels Pi in the comparative example to stop working and the backlight strip to turn off, thus achieving standby mode.

[0039] Among them, combined Figure 1 and Figure 2 As shown, Figure 2 The middle part indicates that Figure 1 The timing diagrams for the signals output from the pins in the middle section, for example, in this embodiment, AC_IN, T_P1, AUX_N, PS_ON, T_P2, LANE_X, and BL_ON represent the signals output from the corresponding 7 pins. Based on the above discussion, the initial period in power-on mode (taking the first power-on as an example) and in standby mode can be analyzed as follows: In the initial period (taking the first power-on as an example), AC_IN rises from a small voltage value that was originally in a floating state to a constant voltage and a large amplitude original power signal ac_in, and maintains the original power signal ac_in in standby mode. During the initial period (taking the first power-on as an example), T_P1 rises from a small voltage value that was originally in a floating state to a constant voltage and a large amplitude first target power signal t_p1, and maintains the first target power signal t_p1 in standby mode; In the initial period (taking the first power-on as an example), AUX_N rises from a small voltage value that was originally in a floating state to a constant voltage and a large amplitude first auxiliary voltage signal aux_n. In standby mode, the first auxiliary voltage signal aux_n is no longer output, resulting in a decrease in voltage value. In the initial period (taking the first power-on as an example), the PS_ON signal rises from a small voltage value that was originally in a floating state to a constant voltage and a large amplitude power-on signal. In standby mode, the power-on signal PS_ON is no longer output, causing the voltage value to decrease. During the initial period (taking the first power-on as an example), T_P2 rises from a small voltage value that was originally in a floating state to a constant voltage and a larger amplitude second target power signal t_p2. In standby mode, it no longer outputs the second target power signal t_p2, resulting in a decrease in voltage value. During the initial period (taking the first power-on as an example), the voltage value of LANE_X, which was initially in a floating state and was relatively small, rises to a constant voltage and a larger amplitude of the original image signal lane_x. In standby mode, the original image signal lane_x is no longer output, resulting in a decrease in voltage value. During the initial period (taking the first power-on as an example), the backlight on signal bl_on, which was originally in a floating state and had a small voltage value, rises to a constant voltage with a large amplitude. In standby mode, the backlight on signal bl_on is no longer output, resulting in a decrease in voltage value.

[0040] The first auxiliary voltage signal aux_n and the second auxiliary voltage signal aux_p can form a differential pair, which can be used by the video source interface 10 to read the extended display recognition data of the receiving device, thereby understanding the performance parameters of the receiving device, such as the supported resolution, refresh rate, color depth, etc.; it can also be used by the video source interface 10 to read the number of main channels supported by the receiving device such as the display, the signal transmission rate, etc.; it can also be used to set various display configuration registers by the video source interface 10, such as setting parameters such as display mode and color space to meet different display needs; and it can also be used by the video source interface 10 to read the display status register to obtain the display's working status information, such as whether it is in power saving mode or whether there is a fault prompt.

[0041] Understandably, in this embodiment, based on the video source interface 10 in the display device 100 outputting an auxiliary voltage signal in power-on mode and not outputting an auxiliary voltage signal in standby mode, an auxiliary circuit 40 is set between the video source interface 10 and the power supply 20 to convert the auxiliary voltage signal into a power-on signal ps_on in power-on mode to achieve power-on, and in standby mode, the power supply 20 only generates a first target power signal t_p1 to achieve standby, thereby replacing the power supply 20 controlled by the system-on-chip 80 to achieve power-on and standby of the display device 100, thereby reducing the cost of the display device 100.

[0042] In some embodiments, combined with Figure 1 and Figure 2 As shown, the voltage value of the first target power signal t_p1 is less than the voltage value of the second target power signal t_p2. For example, the voltage values ​​of the first target power signal t_p1 and the second target power signal t_p2 can be 5V and 12V, respectively.

[0043] Understandably, since only a small number of basic circuits in the display device 100 need to be kept running in standby mode, the load current is extremely small, close to an "unloaded" state. In contrast, multiple core circuits are started in power-on mode, and the load current increases significantly. Therefore, the essence is the logic of "simplified functional requirements → reduced power consumption requirements → active voltage adaptation". That is, compared with the power-on mode, in standby mode, by "reducing voltage + turning off redundant power supply", the display device 100 can achieve low power consumption while meeting standby requirements, avoiding unnecessary power consumption during standby.

[0044] Among them, combined Figures 1 to 3 As shown, the standby circuit in the display device 100 (e.g., included in at least one of the timing controller 30 and power supply 20 described above) is used in the standby mode to switch the display device to the power-on mode according to the first target power signal t_p1 being in a working state and according to the wake-up command.

[0045] That is, the first target power signal t_p1 mentioned above is a standby voltage that can provide power to the chassis switch, network card and other parts that need to wake up the computer to start up, so that these circuits can keep working and respond to subsequent power-on commands. It can also enable the host to respond to remote power-on and power-off, keyboard wake-up and other events, and provide power to the power management module 21 (which may be included in the power supply 20 mentioned above, and can at least provide power to the timing controller 30, gate driver 50, source driver 60 and display panel 70) so as to monitor and manage the power start and stop. When a power-on signal is received, it can control the power to start up in time, and provide power to the circuit for detecting the original image signal lane_x input so that multiple sub-pixels Pi can be quickly woken up to work when the original image signal lane_x is input.

[0046] Among them, combined Figures 1 to 3 As shown, the display device 100 further includes: the aforementioned display panel 70, electrically connected to the timing controller 30; in the power-on mode, the timing controller 30 is used to generate a target image signal based on the second target power signal t_p2 and the original image signal lane_x, and the target image signal is used to determine the display screen of the display panel 70.

[0047] Specifically, such as Figure 1 As shown, the original image signal lane_x can be provided by the signal source and transmitted to the timing controller 30 via the video source interface 10. The original image signal lane_x can include multiple original sub-display signals corresponding to multiple sub-pixels Pi. The timing controller 30 can perform image processing and noise compensation operations on the original image signal lane_x to form a target image signal including multiple target sub-display signals.

[0048] Furthermore, such as Figure 3 As shown, the display device 100 further includes: the aforementioned source driver 60, which is electrically connected between the timing controller 30 and the display panel 70, and is used to generate a plurality of the aforementioned data signals Data according to the target image signal. The plurality of data signals Data are used to control the display panel 70 to display the screen.

[0049] In this context, the multiple target sub-display signals in the target image signal and the multiple original sub-display signals in the original image signal lane_x can all be understood as grayscale values ​​corresponding to multiple sub-pixels Pi under different conditions (each of which can be represented by a digital signal). The source driver 60 can perform decoding, digital-to-analog conversion, buffering and amplification, and other processing on the multiple target sub-display signals in the target image signal to generate multiple data signals Data that are transmitted to multiple data lines. The multiple data voltages in the multiple data signals Data correspond one-to-one with the multiple grayscale values ​​mentioned above. Finally, each data voltage drives the corresponding sub-pixel Pi to present the corresponding color and brightness, thereby controlling the display panel 70 to display the image.

[0050] In some embodiments, combined with Figures 1 to 3 As shown, the power supply 20 includes: a transformer module 23, used to generate the first target power signal t_p1 and the second target power signal t_p2 based on the original power signal ac_in; the aforementioned power management module 21, electrically connected to the transformer module 23, used to generate a third target power signal t_p3 based on the second target power signal t_p2; in the power-on mode, the timing controller 30 is used to generate the target image signal based on the third target power signal t_p3 and the original image signal lane_x.

[0051] The original power signal ac_in can be a constant voltage signal with a voltage value of 220V. After the transformer module 23 generates the second target power signal t_p2 based on the original power signal ac_in in the power-on mode, the power management module 21 can generate multiple constant voltage signals with different amplitudes (including but not limited to 3.3V and 1.8V) based on the second target power signal t_p2 (one of which is the third target power signal t_p3). The third target power signal t_p3 can be used as the working voltage of the timing controller 30 to enable the timing controller 30 to work and generate the target image signal based on the original image signal lane_x. For details, please refer to the relevant description above.

[0052] In some embodiments, combined with Figures 1 to 3 As shown, the display device 100 further includes a backlight module (included in the display panel 10) electrically connected to the timing controller 30; in the power-on mode, the timing controller 30 is used to generate a backlight on signal bl_on according to the third target power signal t_p3, and the backlight on signal bl_on is used to control the backlight module to provide backlight.

[0053] Specifically, after the transformer module 23 generates a second target power signal t_p2 based on the original power signal ac_in in the power-on mode, the backlight driver 22, which is electrically connected between the timing controller 30 and the backlight module, can receive the second target power signal t_p2 and turn on. It then drives the backlight module to provide backlight of corresponding brightness according to the backlight turn-on signal bl_on generated by the timing controller 30. Furthermore, the backlight driver 22 can also adjust the backlight provided by the backlight module according to other factors.

[0054] In the power-on mode, the timing controller 30 generates the backlight-on signal bl_on based on the third target power signal t_p3 after receiving the original image signal lane_x. That is, the backlight driver 22 driving the backlight module to emit light requires the timing controller 30 to have received the original image signal lane_x. Since the original image signal lane_x can then be used to generate multiple data signals Data to control the display panel 70 to display the image, it is only meaningful for the backlight driver 22 to drive the backlight module to emit light under these conditions, to avoid accidentally turning on the backlight module and causing image abnormalities.

[0055] In some embodiments, combined with Figures 1 to 3 As shown, in the standby mode, a current disconnect is formed between the video source interface 10 and the signal source, so that the video source interface 10 does not output the auxiliary voltage signal; in the power-on mode, a current path is formed between the video source interface 10 and the signal source, so that the video source interface 10 outputs the auxiliary voltage signal. That is, the auxiliary voltage signal can only be generated when a current path is formed between the video source interface 10 and the signal source through hardware or software, thereby causing the display device 100 to enter the power-on mode. When no current is formed between the two, it can be considered that the two are not communicating, and the auxiliary voltage signal will not be generated, thereby causing the display device 100 to enter the standby mode.

[0056] Specifically, after the current path between the video source interface 10 and the signal source is switched from being formed to being formed to be broken so that the original image signal lane_x is not transmitted to the timing controller 30 and the video source interface 10 is not outputting the auxiliary voltage signal, the timing controller 30 is configured not to generate the backlight on signal bl_on, and the power supply 20 is configured not to generate the second target power signal t_p2, so that the display device switches from the power-on mode to the standby mode.

[0057] That is, when the display device 100 switches from power-on mode to standby mode, since the backlight turn-on signal bl_on is not generated, the backlight module no longer provides backlight, so the display panel 70 no longer displays the image because the original image signal lane_x is not transmitted to the timing controller 30.

[0058] In some embodiments, combined with Figures 1 to 3 As shown, the auxiliary circuit 40 includes: an operational amplifier 401, the non-inverting input terminal of the operational amplifier 401 being electrically connected to the output terminal of the video source interface 10 for outputting the auxiliary voltage signal, the inverting input terminal of the operational amplifier 401 being electrically connected to the output terminal of the operational amplifier 401, and the output terminal of the operational amplifier 401 being electrically connected to the input terminal of the power supply 20 for receiving the power-on signal ps_on.

[0059] Understandably, based on the principle of virtual short of operational amplifier 401, the signals at the non-inverting input, inverting input, and output of operational amplifier 401 are identical, so that the power-on signal ps_on received by power supply 20 is identical to the auxiliary voltage signal (i.e., the aforementioned first auxiliary voltage signal aux_n). The core function of operational amplifier 401 configured as a voltage follower is to "isolate, buffer, and enhance driving capability," while maintaining complete consistency between the input and output voltages.

[0060] Furthermore, a resistor R (with a resistance value of 47 megohms) can be connected between the non-inverting input of the operational amplifier 401 and ground. This resistor R can counteract the influence of bias current, stabilize the quiescent operating point, and suppress common-mode interference.

[0061] Furthermore, such as Figure 1 As shown, the power supply 20 includes a power management module 21 and a transformer module 23. Both the power supply 20 and the backlight driver 22 can be integrated on the power board 200. The timing controller 30 can be integrated on the control board 300. The control board 300 can also be equipped with, for example, a microprocessor, a microcontroller, a programmable logic device, etc.

[0062] Furthermore, such as Figure 1 As shown, the control board 300 can also send a hot-plug detection signal hpd to the video source interface 10 so that the video source interface 10 can detect its connection and disconnection with the control board 300. For example, when the two are connected, the voltage value of the hot-plug detection signal hpd will be pulled up by the pull-up resistor. When the rising edge of the hot-plug detection signal hpd lasts for more than 2ms, it will be confirmed that the two are connected. When the two are disconnected, the voltage value of the hot-plug detection signal hpd will be pulled down. After the video source interface 10 detects the falling edge of the hot-plug detection signal hpd within 1ms, it will stop video transmission and reset the link status.

[0063] This application also provides a driving method for a display device, wherein the display device 100 includes a video source interface 10, a power supply 20, a timing controller 30 electrically connected between the video source interface 10 and the power supply 20, and an auxiliary circuit 40, such as... Figure 5 As shown, the driving method for the display device includes, but is not limited to, the following steps and combinations thereof: S1, in standby mode, control the power supply 20 to generate a first target power signal t_p1 based on the original power signal ac_in; S2, in power-on mode, control the video source interface 10 to output an auxiliary voltage signal, control the auxiliary circuit 40 to generate a power-on signal ps_on based on the auxiliary voltage signal, and control the power supply 20 to generate a second target power signal t_p2 based on the power-on signal ps_on and the original power signal ac_in. The first target power signal t_p1 and the second target power signal t_p2 are two constant voltage signals with different voltage values.

[0064] For details regarding the technical features in steps S1 to S2, please refer to the relevant discussion of the display device 100 above.

[0065] For example, Figure 6 A schematic diagram of the structure of an electronic device provided in an embodiment of this application is shown.

[0066] like Figure 6 As shown, the electronic device 500 may include a processor 510. Optionally, the electronic device may also include a memory 520, and the aforementioned display device 100, etc.

[0067] Processor 510 may include one or more processing units, such as an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural network processing unit (NPU). These different processing units may be independent devices or integrated into one or more processors.

[0068] The controller can generate operation control signals based on the instruction opcode and timing signals to complete the control of instruction fetching and execution.

[0069] The processor 510 may also include a memory for storing instructions and data. In some embodiments, the memory in the processor 510 is a cache memory. This memory can store instructions or data that the processor 510 has just used or that are used repeatedly. If the processor 510 needs to use the instruction or data again, it can directly retrieve it from the memory. This avoids repeated accesses, reduces the waiting time of the processor 510, and thus improves the efficiency of the system.

[0070] The processor 510 may include one or more interfaces. These interfaces can be used to connect the processor 510 to the memory 520, the display device 100, and the like.

[0071] The memory 520 can be used to store computer executable program code, which includes instructions. The memory 520 may include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (such as image playback), etc. The data storage area may store data created during the use of the electronic device 500, etc. The processor 510 executes various functional applications and data processing of the electronic device 500 by running instructions stored in the memory 520 and / or instructions stored in memory located within the processor.

[0072] It is understood that the structures illustrated in the embodiments of this application do not constitute a specific limitation on the electronic device. In other embodiments of this application, the electronic device may include... Figure 6 The diagram shows more or fewer components, or combinations of components, or separate components, or different arrangements of components. The components shown can be implemented in hardware, software, or a combination of both.

[0073] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0074] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Although this application has disclosed preferred embodiments as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A display device, characterized in that, It has standby mode and power-on mode, including: The video source interface is electrically connected to the signal source and is used to output an auxiliary voltage signal. A power supply unit is used to generate a first target power signal and a second target power signal based on the original power signal, wherein the first target power signal and the second target power signal are two constant voltage signals with different voltage values; A timing controller is electrically connected between the video source interface and the power supply. An auxiliary circuit, electrically connected between the video source interface and the power supply, is used to generate a power-on signal based on the auxiliary voltage signal. In the standby mode, the power supply is used to generate the first target power signal; In the power-on mode, the video source interface is used to output the auxiliary voltage signal, the auxiliary circuit is used to generate the power-on signal based on the auxiliary voltage signal, and the power supply is used to generate the second target power signal based on the power-on signal and the original power signal.

2. The display device according to claim 1, characterized in that, The voltage value of the first target power signal is less than the voltage value of the second target power signal.

3. The display device according to claim 1, characterized in that, The standby circuit in the display device is used to switch the display device to the power-on mode according to the first target power signal being in a working state in the standby mode and according to the wake-up command.

4. The display device according to claim 1, characterized in that, Also includes: The display panel is electrically connected to the timing controller; In the power-on mode, the timing controller is used to generate a target image signal based on the second target power signal and the original image signal, and the target image signal is used to determine the display screen of the display panel.

5. The display device according to claim 4, characterized in that, The power supply includes: A transformer module is used to generate the first target power signal and the second target power signal based on the original power signal; The power management module, electrically connected to the transformer module, is used to generate a third target power signal based on the second target power signal; In the power-on mode, the timing controller is used to generate the target image signal based on the third target power signal and the original image signal.

6. The display device according to claim 5, characterized in that, Also includes: The backlight module is electrically connected to the timing controller; In the power-on mode, the timing controller is used to generate a backlight turn-on signal based on the third target power signal, and the backlight turn-on signal is used to control the backlight module to provide backlight.

7. The display device according to claim 6, characterized in that, In the power-on mode, the timing controller is used to generate the backlight-on signal according to the second target power signal after receiving the original image signal.

8. The display device according to claim 6, characterized in that, In the standby mode, a current disconnection is formed between the video source interface and the signal source, so that the video source interface does not output the auxiliary voltage signal; In the power-on mode, a current path is formed between the video source interface and the signal source, so that the video source interface outputs the auxiliary voltage signal.

9. The display device according to claim 8, characterized in that, After the current path between the video source interface and the signal source is switched from being formed to being formed to be broken so that the original image signal is not transmitted to the timing controller and the video source interface is not outputting the auxiliary voltage signal, the timing controller is configured not to generate the backlight turn-on signal and the power supply is configured not to generate the second target power signal, so that the display device switches from the power-on mode to the standby mode.

10. The display device according to claim 4, characterized in that, Also includes: A source driver, electrically connected between the timing controller and the display panel, is used to generate multiple data signals based on the target image signal, and the multiple data signals are used to control the display panel to display the image.

11. The display device according to any one of claims 1 to 10, characterized in that, The auxiliary circuit includes: An operational amplifier, wherein the non-inverting input terminal of the operational amplifier is electrically connected to the output terminal of the video source interface for outputting the auxiliary voltage signal, the inverting input terminal of the operational amplifier is electrically connected to the output terminal of the operational amplifier, and the output terminal of the operational amplifier is electrically connected to the input terminal of the power supply for receiving the power-on signal.

12. A driving method for a display device, characterized in that, The display device includes a video source interface, a power supply, a timing controller electrically connected between the video source interface and the power supply, and auxiliary circuitry. The driving method for the display device includes: In standby mode, the power supply is controlled to generate a first target power signal based on the original power signal; In power-on mode, the video source interface is controlled to output an auxiliary voltage signal, the auxiliary circuit is controlled to generate a power-on signal based on the auxiliary voltage signal, and the power supply is controlled to generate a second target power signal based on the power-on signal and the original power signal. The first target power signal and the second target power signal are two constant voltage signals with different voltage values.

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