WO2021088253A1

WO2021088253A1 - Display device

Info

Publication number: WO2021088253A1
Application number: PCT/CN2020/073104
Authority: WO
Inventors: 王远洋; 庞震华
Original assignee: 海信视像科技股份有限公司
Priority date: 2019-11-04
Filing date: 2020-01-20
Publication date: 2021-05-14
Also published as: CN111526398B; CN112785985B; CN111526398A; CN112785985A

Abstract

A display device (700), comprising: a display screen, a backlight assembly (702), a first power supply circuit (7031), a second power supply circuit (7032), a TCON circuit (704), a backlight driver circuit (705), and a controller (701); the controller (701) is configured to control the first power supply circuit (7031) to supply power to the second power supply circuit (7032) when a power-on instruction is received. Thus, by controlling the startup sequence of the first power supply circuit (7031) and the second power supply circuit (7032), the standby power consumption of the display device (700) is reduced.

Description

display screen

This application is required to be submitted to the Chinese Patent Office on November 4, 2019, the application number is 201911067364.0, the application name is "display equipment" and the application is submitted to the China Patent Office on January 8, 2020, the application number is 202010018527.2, and the application name is "display equipment "The priority of the Chinese patent application, the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the field of power supply technology, and in particular to a display device.

Background technique

With the continuous development of technology and economy, people's living standards are getting higher and higher. For example, people hope that display devices such as TV sets have better picture quality and achieve brightness indicators. If a single power supply architecture is used to power the display device, it will be difficult to select a suitable and low-cost power supply. If the dual power supply architecture is used to realize the power supply of the display device, the actual needs of people can be met.

In order to balance the power supply of dual power supplies, display devices usually collect sub-regional backlight power supply. However, the dual power supply mode often results in high standby power consumption of the display device, which is likely to cause a waste of resources.

Application content

The present application provides a display device to solve the problems of excessively high standby power when dual power supplies are supplied in parallel in the prior art, and the thermistor is overheated and damaged due to the generation of surge current.

This application provides a display device, including:

The display screen is configured to present image content;

A backlight assembly configured to provide a backlight light source for the display screen;

The first power supply circuit is configured to provide power to part of the backlight light source in the backlight assembly;

The second power supply circuit is configured to provide power to part of the backlight light source in the backlight assembly;

The TCON circuit is configured to drive the display screen to present image content;

A backlight driving circuit configured to control the brightness and/or turning on and off of the backlight light source in the backlight assembly;

The controller is configured to control the first power supply circuit to supply power to the second power supply circuit when receiving the power-on instruction.

In some embodiments, it further includes: a power supply switching circuit; the power supply switching circuit is connected between the input terminal of the first power supply circuit and the input terminal of the second power supply circuit, and the input of the first power supply circuit Connected to the power supply equipment;

The controller is configured to control the first power supply circuit to supply power to the controller and to provide the backlight drive circuit with power for the backlight light source located in the first area of the backlight assembly;

The controller is further configured to control the first power supply circuit to supply power to the second power supply circuit by turning on the power supply switching circuit, and control the powered second power supply circuit to drive the backlight The circuit provides power to the backlight light source located in the second area of the backlight assembly, and the first area and the second area constitute a display area of the display screen.

In some embodiments, the controller is further configured to connect the second thermistor in the second power supply circuit from series to the power supply switching circuit and the second power supply circuit after a preset period of time. The power supply circuits are switched to be short-circuited and connected between the power supply switching circuit and the second power supply circuit, and the second power supply circuit is controlled to provide the backlight driving circuit with the backlight light source located in the second area of the backlight assembly Of electrical energy.

In some embodiments, the controller is further configured to control all the components by connecting the second thermistor in the second power supply circuit in series between the power supply switching circuit and the second power supply circuit. The first power supply circuit supplies the voltage input by the power supply device to the second power supply circuit.

In some embodiments, the controller is configured to control the first thermistor in the first power supply circuit by connecting the first thermistor in the first power supply circuit in series between the power supply device and the first power supply circuit. A power supply circuit supplies the voltage input from the power supply device to the controller and supplies the backlight drive circuit with power for the backlight light source located in the first area of the backlight assembly.

In some embodiments, the controller is further configured to control the first thermistor in the first power supply circuit to switch from being connected in series between the power supply device and the first power supply circuit to a short-circuit connection Between the power supply device and the first power supply circuit.

In some embodiments, the first power supply circuit includes: a first resistance switching circuit and a first voltage conversion circuit;

Wherein, the control end of the first resistance switching circuit is connected to the controller, the first resistance switching circuit is connected in parallel between the first end and the second end of the first thermistor, and the first resistance switching circuit is connected in parallel between the first end and the second end of the first thermistor. The first end of a thermistor is also connected to the power supply device, the second end of the first thermistor is connected to the input end of the first voltage conversion circuit, and the first output end of the first voltage conversion circuit is Connected to the controller, and the second output terminal of the first voltage conversion circuit is connected to the backlight driving circuit;

The controller is configured to send a first signal to the first resistance switching circuit;

The first resistance switching circuit is configured to control the first thermistor to be connected in series between the power supply device and the first voltage conversion circuit based on the first signal;

The controller is further configured to send a second signal to the first resistance switching circuit;

The first resistance switching circuit is further configured to control the first thermistor to be short-circuited and connected between the power supply device and the first voltage conversion circuit based on the second signal;

The first voltage conversion circuit is configured to convert the voltage input by the power supply device and supply power to the controller, and to provide the backlight driving circuit with the power of the backlight light source located in the first area of the backlight assembly .

In some embodiments, the first resistance switching circuit includes: a third resistor, a third capacitor, a fourth resistor, a fifth resistor, a second triode, a first capacitor, a third diode, and a third relay ；

Wherein, the first end of the third resistor and the fourth end of the third relay are both connected to the controller, and the second end of the third resistor is respectively connected to the first end and the first end of the third capacitor. The first end of the fifth resistor is connected, the second end of the fifth resistor is respectively connected to the first end of the fourth resistor and the base of the second triode, and the second triode is The collector of the tube is respectively connected to the first end of the first capacitor, the anode of the third diode, and the first end of the third relay. The second end of the first capacitor is connected to the first end of the third relay. The cathodes of the three diodes are all connected to the fourth end of the third relay, the second end of the third relay is connected to the first end of the first thermistor, and the third end of the third relay is connected to the first end of the first thermistor. The terminal is connected to the second terminal of the first thermistor, and the second terminal of the third capacitor, the second terminal of the fourth resistor, and the emitter of the second triode are all grounded;

The first voltage conversion circuit includes: a first electromagnetic interference circuit, a first rectification filter circuit, a first PFC circuit, and a first LLC circuit;

Wherein, the input end of the first electromagnetic interference circuit is connected to the output end of the first resistance switching circuit and the second end of the first thermistor respectively, and the output end of the first electromagnetic interference circuit is connected to the second end of the first thermistor. The input end of the first rectification and filter circuit is connected, the output end of the first rectification and filter circuit is connected to the input end of the first PFC circuit, and the output end of the first PFC circuit is connected to the first LLC circuit. The input terminal is connected, and the output terminal of the first LLC circuit is respectively connected to the controller and the backlight driving circuit.

In some embodiments, the second power supply circuit is configured to receive the second signal output by the first power supply circuit or the controller after power supply, and the first power supply circuit passes all the signals. When the power supply switching circuit starts supplying power to the second power supply circuit, based on the second signal, the second thermistor is controlled to be connected in series between the power supply switching circuit and the second power supply circuit with a delay The preset duration; after the preset duration, control the second thermistor to be short-circuited and connected between the power supply switching circuit and the second power supply circuit;

or,

The second power supply circuit is configured to control the second thermistor to be connected in series to the power supply switching circuit when the first power supply circuit starts to supply power to the second power supply circuit through the power supply switching circuit Between the second power supply circuit and the second power supply circuit; the second signal is received from the first power supply circuit or the controller after supplying power after the preset time period, and based on the second signal, controls the The second thermistor is short-circuited and connected between the power supply switching circuit and the second power supply circuit.

In some embodiments, the second power supply circuit includes: a second resistance switching circuit and a second voltage conversion circuit;

Wherein, the control end of the second resistance switching circuit is connected to the first power supply circuit or the controller, and the second resistance switching circuit is connected in parallel to the first end and the second end of the second thermistor. The first terminal of the second thermistor is also connected to the output terminal of the power supply switching circuit, and the second terminal of the second thermistor is also connected to the input terminal of the second voltage conversion circuit. Connected, the output terminal of the second voltage conversion circuit is connected to the backlight driving circuit;

The second resistance switching circuit is configured to receive the second signal output by the controller after receiving the first power supply circuit or the power supply, and the first power supply circuit sends the signal to the power supply circuit through the power supply switching circuit. When the second power supply circuit starts to supply power, based on the second signal, the second thermistor is controlled to be connected in series between the power supply switching circuit and the second voltage conversion circuit, and the preset duration is delayed ；

The second resistance switching circuit is further configured to control the second thermistor to be short-circuited and connected between the power supply switching circuit and the second voltage conversion circuit after the preset time period has elapsed;

The second voltage conversion circuit is used for converting the voltage output from the first power supply circuit and providing the backlight driving circuit with power of the backlight light source located in the second area of the backlight assembly.

In some embodiments, the second resistance switching circuit includes: a first resistor, a second capacitor, a Zener tube, a second resistor, a first triode, a second diode, and a second relay;

Wherein, the first end of the first resistor and the fourth end of the second relay are both connected to the controller or the first power circuit, and the second end of the first resistor is respectively connected to the second capacitor The first end of the voltage regulator tube is connected to the negative electrode of the voltage regulator tube, and the anode electrode of the voltage regulator tube is respectively connected to the first end of the second resistor and the base electrode of the first triode. The collector of the pole tube is respectively connected to the anode of the second diode and the first end of the second relay, and the cathode of the second diode is connected to the fourth end of the second relay, so The second end of the second relay is connected to the first end of the second thermistor, the third end of the second relay is connected to the second end of the second thermistor, and the second capacitor The second end of the second resistor, the second end of the second resistor, and the emitter of the first triode are all grounded;

The second voltage conversion circuit includes: a second electromagnetic interference circuit, a second rectification filter circuit, a second PFC circuit, and a second LLC circuit;

Wherein, the input end of the second electromagnetic interference circuit is respectively connected to the output end of the second resistance switching circuit and the second end of the second thermistor, and the output end of the second electromagnetic interference circuit is connected to the second end of the second thermistor. The input end of the second rectification filter circuit is connected, the output end of the second rectification filter circuit is connected to the input end of the second PFC circuit, and the output end of the second PFC circuit is connected to the second LLC circuit. The input terminal is connected, and the output terminal of the second LLC circuit is connected to the backlight driving circuit.

In some embodiments, the second power supply circuit includes: a third resistance switching circuit and a third voltage conversion circuit;

Wherein, the control end of the third resistance switching circuit is connected to the first power supply circuit and/or the controller, and the third resistance switching circuit is connected in parallel to the first end of the second thermistor and Between the second terminals, the first terminal of the second thermistor is also connected to the output terminal of the power supply switching circuit, and the second terminal of the second thermistor is also connected to the output terminal of the third voltage conversion circuit. The input terminal is connected, and the output terminal of the third voltage conversion circuit is connected to the backlight driving circuit;

The third resistance switching circuit is used to control the second thermistor to be connected in series to the power supply switching circuit when the first power supply circuit starts to supply power to the second power supply circuit through the power supply switching circuit And the third resistance switching circuit;

The third resistance switching circuit is further configured to receive the second signal from the first power supply circuit or the controller after power supply after the preset time period; and based on the second signal, control all The second thermistor is short-circuited and connected between the power supply switching circuit and the third resistance switching circuit;

The third voltage conversion circuit is configured to convert the voltage output from the first power supply circuit and provide the backlight driving circuit with power of the backlight light source located in the second area of the backlight assembly.

In some embodiments, the third resistance switching circuit includes: a sixth resistance, a third triode, a fourth diode, and a fourth relay;

Wherein, the first end of the sixth resistor, the base of the third triode, and the fourth end of the fourth relay are all connected to the controller or the first power circuit, and the third third The collector of the pole tube is respectively connected to the anode of the fourth diode and the first end of the fourth relay, and the cathode of the fourth diode is connected to the fourth end of the fourth relay, so The second end of the fourth relay is connected to the first end of the second thermistor, the third end of the fourth relay is connected to the second end of the second thermistor, and the second capacitor The second end of the sixth resistor, the second end of the sixth resistor, and the emitter of the third triode are all grounded;

The third voltage conversion circuit includes: a third electromagnetic interference circuit, a third rectification filter circuit, a third PFC circuit, and a third LLC circuit;

Wherein, the input end of the third electromagnetic interference circuit is connected to the output end of the third resistance switching circuit and the second end of the second thermistor respectively, and the output end of the third electromagnetic interference circuit is connected to the second end of the second thermistor. The input end of the third rectification and filter circuit is connected, the output end of the third rectification and filter circuit is connected to the input end of the third PFC circuit, and the output end of the third PFC circuit is connected to the third LLC circuit. The input terminal is connected, and the output terminal of the third LLC circuit is connected to the backlight driving circuit.

In some embodiments, the power supply switching circuit is provided in the first power circuit, and/or the power supply switching circuit is provided in the second power circuit.

In some embodiments, the power supply switching circuit includes: a fourth capacitor, a first diode, a first relay, and a fuse;

Wherein, the first terminal of the fourth capacitor, the cathode of the first diode, and the fourth terminal of the first relay are all connected to the controller or the first power circuit, and the first The third terminal of the relay is connected to the first terminal of the fuse, the second terminal of the fuse is connected to the second power circuit, and the second terminal of the first relay is connected to the power supply device and the first terminal, respectively. A power circuit is connected, and the first terminal of the first relay, the anode of the first diode and the second terminal of the fourth capacitor are all grounded.

In the display device provided by the present application, when the display device is powered on, the first power circuit can be powered on and start to work, and the second power circuit is not powered on and cannot start to work, so that the display device enters a standby mode and saves the standby power of the display device. . Moreover, when the display device needs power from the second power circuit, the controller can control the first power circuit to supply power to the second power circuit, so that the second power circuit can provide power to the display device, facilitating the use of the display device.

Description of the drawings

In order to more clearly describe the technical solutions in the present application or related technologies, the following will briefly introduce the drawings that need to be used in the embodiments or related technical descriptions. Obviously, the drawings in the following description are of the present application. For some embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without creative labor.

Figure 1 is a schematic diagram of an operation scenario between a display device and a control device;

Fig. 2a is a schematic diagram of the hardware structure of the hardware system in the display device in Fig. 1;

Figure 2b is a schematic diagram of the hardware structure of a hardware system in a display device;

Fig. 3 is a schematic diagram of the connection relationship between the power supply component and the load in Fig. 2a;

Fig. 4 is a schematic diagram of a power supply architecture in Fig. 2a;

Figure 5 is a block diagram of the hardware architecture of the display device in Figure 2a;

Fig. 6 is a schematic diagram of the functional configuration of the display device in Fig. 2a;

FIG. 7 is a schematic structural diagram of a display device provided by an embodiment of the application;

FIG. 8 is a schematic diagram of the structure of the first power supply circuit in FIG. 7;

FIG. 9 is a schematic diagram of the structure of the first resistance switching circuit in FIG. 8;

10 is a schematic diagram of the structure of the first voltage conversion circuit in FIG. 8;

FIG. 11 is a schematic diagram of the structure of the power supply switching circuit in FIG. 7;

FIG. 12 is a schematic structural diagram of a display device provided by an embodiment of this application;

FIG. 13 is a schematic diagram of the structure of the second power supply circuit in FIG. 12;

FIG. 14 is a schematic diagram of the structure of the second resistance switching circuit in FIG. 13;

15 is a schematic diagram of the structure of the second voltage conversion circuit in FIG. 13;

FIG. 16 is a schematic structural diagram of a display device provided by an embodiment of the application;

FIG. 17 is a schematic diagram of the structure of the second power supply circuit in FIG. 16;

FIG. 18 is a schematic diagram of the structure of the third resistance switching circuit in FIG. 17;

FIG. 19 is a schematic structural diagram of a display device provided by an embodiment of this application;

FIG. 20 is a schematic structural diagram of a display device provided by an embodiment of the application.

Detailed ways

The following describes the technical solutions in the embodiments of the present application clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects, without having to use To describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those clearly listed. Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.

The display device provided by each embodiment of the present application may have a display device with a single system and a single display structure. For example, the display device includes: a display screen configured to display screen images; a sound reproduction device configured to play sound; a power supply circuit configured to provide power to a load of the display device, the load including a display screen and a sound reproduction device Wait.

Or, this application is mainly directed to a display device with a dual system and dual display structure, that is, a display device with a first controller (a first hardware system), a second controller (a second hardware system), a first display screen, and a second display screen For the audio-visual synchronization processing of the display device, the structure, function, and implementation manner of the display device with a dual-system hardware structure will be described in detail below.

For the convenience of users, various external device interfaces are usually provided on the display device to facilitate the connection of different peripheral devices or cables to achieve corresponding functions. When a high-resolution camera is connected to the interface of the display device, if the hardware system of the display device does not have the hardware interface of the high-pixel camera that receives the source code, it will cause the data received by the camera to be unable to present the data received by the camera to the display of the display device. On the screen.

Moreover, due to the hardware structure, the hardware system of traditional display devices only supports one hard decoding resource, and usually only supports 4K resolution video decoding. Therefore, when you want to realize the video chat while watching Internet TV, in order not to reduce The definition of the network video picture requires the use of hard decoding resources (usually the GPU in the hardware system) to decode the network video. In this case, the general-purpose processor (such as CPU) in the hardware system can only be used to decode the video. The video chat screen is processed by soft decoding.

Using soft decoding to process the video chat screen will greatly increase the data processing burden on the CPU. When the data processing burden on the CPU is too heavy, the picture may freeze or become unsmooth. Further, subject to the data processing capabilities of the CPU, when the CPU soft decoding is used to process the video chat screen, it is usually impossible to achieve multi-channel video calls. When the user wants to simultaneously video chat with multiple other users in the same chat scene, it will There is a situation where access is blocked.

Based on the above considerations, in order to overcome the above shortcomings, this application discloses a dual-system hardware system architecture to realize multiple channels of video chat data (at least one local video).

The concepts involved in the present application will be described below in conjunction with the drawings. It should be pointed out here that the following description of each concept is only to make the content of this application easier to understand, and does not mean to limit the scope of protection of this application.

The term "circuit" used in the various embodiments of this application can refer to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or a combination of hardware or/and software code that can execute related to the component Function.

The term "remote control" used in the various embodiments of this application refers to a component of an electronic device (such as the display device disclosed in this application), which can generally control the electronic device wirelessly within a short distance. This component can generally use infrared and/or radio frequency (RF) signals and/or Bluetooth to connect with electronic devices, and can also include functional circuits such as WiFi, wireless USB, Bluetooth, and motion sensors. For example, a handheld touch remote control replaces most of the physical built-in hard keys in general remote control devices with the user interface in the touch screen.

The term "user interface" used in the embodiments of this application is a medium interface for interaction and information exchange between an application or operating system and a user, and it realizes the conversion between the internal form of information and the form acceptable to the user. The commonly used form of the user interface is a graphical user interface (GUI), which refers to a user interface related to computer operations that is displayed in a graphical manner. It can be an icon, window, control and other interface elements displayed on the display screen of an electronic device. The control can include icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, Widgets, etc. Visual interface elements.

The term "gesture" used in the embodiments of the present application refers to a user's behavior through a change of hand shape or hand movement to express expected ideas, actions, goals, and/or results.

The term "hardware system" used in the various embodiments of this application may refer to an integrated circuit (IC), printed circuit board (Printed circuit board, PCB) and other mechanical, optical, electrical, and magnetic devices with computing , Control, storage, input and output functions of the physical components. In the various embodiments of the present application, the hardware system is usually also referred to as a motherboard or a chip.

Fig. 1 exemplarily shows a schematic diagram of an operation scenario between a display device and a control device according to an embodiment. As shown in FIG. 1, the user can operate the display device 200 by controlling the device 100.

Wherein, the control device 100 may be a remote controller 100A, which can communicate with the display device 200 through infrared protocol communication, Bluetooth protocol communication, ZigBee protocol communication or other short-distance communication methods for wireless or other short-distance communication. The display device 200 is controlled in a wired manner. The user can control the display device 200 by inputting user instructions through keys on the remote controller 100A, voice input, and control panel input. For example: the user can control the display device by inputting corresponding control commands through the volume up and down keys on the remote control 100A, channel control keys, up/down/left/right movement keys, voice input keys, menu keys, switch machine keys, etc. 200 features.

The control device 100 may also be a smart device, such as a mobile terminal 100B, a tablet computer, a computer, a notebook computer, etc., which may be connected through a local area network (LAN, Wide Area Network), a wide area network (WAN, Wide Area Network), and a wireless local area network (WLAN, Wireless Local Area Network) or other networks communicate with the display device 200, and control the display device 200 through an application program corresponding to the display device 200. For example, an application program running on a smart device is used to control the display device 200. The application can provide users with various controls through an intuitive user interface (UI, User Interface) on the screen associated with the smart device.

For example, both the mobile terminal 100B and the display device 200 can be installed with software applications, so that the connection and communication between the two can be realized through a network communication protocol, and the purpose of one-to-one control operation and data communication can be realized. For example, the mobile terminal 100B can establish a control command protocol with the display device 200, synchronize the remote control keyboard to the mobile terminal 100B, and control the user interface of the mobile terminal 100B to achieve the function of controlling the display device 200; or the mobile terminal 100B The audio and video content displayed on the screen is transmitted to the display device 200 to realize the synchronous display function.

As shown in FIG. 1, the display device 200 can also communicate with the server 300 through multiple communication methods. In various embodiments of the present application, the display device 200 may be allowed to perform a wired communication connection or a wireless communication connection with the server 300 through a local area network, a wireless local area network, or other networks. The server 300 may provide various contents and interactions to the display device 200.

For example, the display device 200 can receive software program updates by sending and receiving information and interacting with an Electronic Program Guide (EPG), or accessing a remotely stored digital media library. The server 300 may be a group or multiple groups, and may be one or more types of servers. The server 300 provides other network service content such as video-on-demand and advertising services.

The display device 200 includes: a first display screen 201 and a second display screen 202, wherein the first display screen 201 and the second display screen 202 are independent of each other, and the first display screen 201 and the second display screen 202 adopt dual Hardware control system.

Among them, the first display screen 201 and the second display screen 202 can be used to display different display pictures. For example, the first display screen 201 can be used for screen display of traditional TV programs, and the second display screen 202 can be used for screen display of auxiliary information such as notification messages and voice assistants.

In some embodiments, the content displayed on the first display screen 201 and the content displayed on the second display screen 202 may be independent of each other without affecting each other. For example, when the first display screen 201 is playing a TV program, the second display screen 202 may display information such as time, weather, temperature, and reminder messages that are not related to the TV program.

In some embodiments, there may also be an association relationship between the content displayed on the first display screen 201 and the content displayed on the second display screen 202. For example, when the main screen of the video chat is played on the first display screen 201, the second display screen 202 may display information such as the avatar and the chat duration of the user currently accessing the video chat.

In some embodiments, part or all of the content displayed on the second display screen 202 can be adjusted to be displayed on the first display screen 201. For example, when the main screen of the video chat is played on the first display screen 201, the time, weather, temperature, reminder message and other information displayed on the second display screen 202 can be adjusted to the first display screen 201 for display. Display other information.

In addition, the first display screen 201 displays a multi-party interactive screen while displaying a traditional TV program screen, and the multi-party interactive screen does not block the traditional TV program screen. Among them, the present application does not limit the display mode of the traditional TV program screen and the multi-party interactive screen. For example, this application can set the position and size of the traditional TV program screen and the multi-party interactive screen according to the priority of the traditional TV program screen and the multi-party interactive screen.

Taking the priority of traditional TV program screens higher than the priority of multi-party interactive screens as an example, the area of traditional TV program screens is larger than that of multi-party interactive screens, and the multi-party interactive screens can be located on one side of the traditional TV program screen or can be set floating In any area of the traditional TV program screen.

The display device 200, on the one hand, may be a liquid crystal display, an OLED (Organic Light Emitting Diode) display, or a projection display device; on the other hand, the display device may be a smart TV or a display system composed of a display and a set-top box. The specific display device type, size, resolution, etc. are not limited, and those skilled in the art can understand that the display device 200 can make some changes in performance and configuration as required.

In addition to providing the broadcast receiving TV function, the display device 200 may additionally provide a smart network TV function that provides a computer support function. Examples include Internet TV, Smart TV, Internet Protocol TV (IPTV), and so on. In some embodiments, the display device may not have the function of broadcasting and receiving TV.

As shown in FIG. 1, the display device 200 may be connected or provided with a camera for presenting the pictures taken by the camera on the display interface of the display device or other display devices, so as to realize interactive chats between users. Specifically, the picture captured by the camera can be displayed on the display device in full screen, half screen, or in any optional area.

As a connection method in some embodiments, the camera is connected to the rear shell of the display device through a connecting plate, and is fixedly installed on the upper middle of the rear shell of the display device. As an installable method, it can be fixedly installed on the rear of the display device. Any position of the shell can ensure that the image capture area is not blocked by the rear shell. For example, the image capture area and the display device have the same orientation.

As another connection method in some embodiments, the camera can be connected to the rear shell of the display device through a connecting plate or other conceivable connectors. A lifting motor is installed on the connector. When the user wants to use the camera or has an application When the camera is to be used, it is raised above the display device. When the camera is not needed, it can be embedded behind the back shell to protect the camera from damage and protect the privacy of the user.

As an embodiment, the camera used in this application may have 17 million pixels to achieve the purpose of ultra-high-definition display. In actual use, a camera with higher or lower than 17 million pixels can also be used.

When a camera is installed on the display device, the content displayed in different application scenarios of the display device can be merged in a variety of different ways, so as to achieve functions that cannot be achieved by traditional display devices.

Exemplarily, through the display device, the user can video chat with at least one other user while watching a video program. In the display device, the presentation of the video program can be used as the background picture, and the video chat window is displayed on the background picture. Visually, it can be said that the display device has the function of "watching and chatting".

In some embodiments, in the application scenario of “watching while chatting”, the user can use the display device to watch live video or network video while simultaneously conducting at least one video chat across terminals.

In another example, the user can use the display device to start a video chat with at least one other user while entering the education application for learning. For example, students can realize remote interaction with teachers while learning content in educational applications. Visually, it can be said that the display device has the function of "learning while chatting".

In another example, the user can use the display device to perform a video chat with players entering the game while playing a card game. For example, when a player enters a game application to participate in a game, it can realize remote interaction with other players. Visually, it can be said that the display device has the function of "watching and playing".

In some embodiments, in the display device, the game scene is merged with the video screen, and the portrait in the video screen is cut out and displayed on the game screen to improve the user experience.

In some embodiments, in the display device, in somatosensory games (such as ball games, boxing games, running games, dancing games, etc.), human body postures and movements, body detection and tracking, and key point data of human bones are acquired through the camera. Detection, and then fusion with the game screen, to achieve games such as sports, dance and other scenes.

In another example, through the display device, the user can interact with at least one other user in video and voice while the K song is applied. Vividly, it can be said that the display device has the function of "watching and singing".

In some embodiments, in the "watching and singing" application scenario, the user can use the display device to record a song with other users while chatting.

In another example, the user can open the camera locally to obtain pictures and videos through the display device. Visually, it can be said that the display device has the function of "looking in the mirror".

In other examples, the display device can also add more functions or reduce the above-mentioned functions. This application does not specifically limit the function of the display device.

Fig. 2a exemplarily shows a schematic diagram of the hardware structure of the hardware system in the display device 200 according to an exemplary embodiment. For ease of description, the display device 200 in FIG. 2a uses a liquid crystal display as an example for illustration.

As shown in FIG. 2a, the display device 200 may include: a first panel 11, a first backlight assembly 12, a first rear case 13, a first controller 14, a second controller 15, a first display driving circuit 16, and a second panel 21. The second backlight assembly 22, the second rear case 23, the second display driving circuit 24, and the power supply assembly 30. In addition, in some embodiments, the display device 200 may further include a base or a suspension bracket. For ease of description, the display device 200 in FIG. 2a includes a base 41 for illustration, and the base 41 is used to support the display device 200. It is worth noting that only one form of base design is shown in the figure, and those skilled in the art can design different forms of bases according to product requirements.

Among them, the first panel 11 is used to present a picture of the first display screen 201 to the user. In some embodiments, the first panel 11 may be a liquid crystal panel. For example, a liquid crystal panel may include, from top to bottom, a horizontal polarizer, a color filter, a liquid crystal layer, a thin film transistor TFT, a vertical polarizer, a light guide plate, and a printed circuit board (PCB). The printed circuit board The PCB 17 is provided with driving circuits such as a gate driving circuit and a source driving circuit. Wherein, the gate driving circuit is connected to the gate of the thin film transistor TFT through a scan line, and the source driving circuit is connected to the drain of the thin film transistor TFT through a data line.

Wherein, the first backlight assembly 12 is located under the first panel 11, and is usually some optical components for supplying sufficient brightness and uniformly distributed light sources, so that the first panel 11 can display images normally. The first backlight assembly 12 also includes a first back plate (not shown in the figure).

Wherein, the first rear case 13 is covered on the first panel 11 to jointly hide the display devices such as the first backlight assembly 12, the first controller 14, the second controller 15, the first display driving circuit 16, the power supply assembly 30, etc. 200 parts, play a beautiful effect.

Among them, the first controller 14, the second controller 15, the first display driving circuit 16 and the power supply assembly 30 are arranged on the first backplane, and some convex hull structures are usually stamped on the first backplane. The first controller 14, the second controller 15, the first display driving circuit 16 and the power supply assembly 30 are fixed on the convex hull by screws or hooks. The first controller 14, the second controller 15, the first display drive circuit 16 and the power supply assembly 30 can be arranged on one board together, or can be arranged on different boards, for example, the first controller 14 is arranged on a main board, The second controller 15 is arranged on the interactive board, the first display driving circuit 16 is arranged on the first display driving board, and the power supply assembly 30 is arranged on the power supply board. The backlight assembly 12 is jointly arranged on a board, which can be set according to actual needs, which is not limited in this application. For ease of description, in FIG. 2a, the first controller 14, the second controller 15, the first display driving circuit 16 and the power supply assembly 30 are all provided on one board for illustration.

Among them, the main function of the first display driving circuit 16 is to perform a thousand-level backlight partition control through the backlight driving signal transmitted by the first controller 14, such as a PWM signal and a Localdimming signal. This part of the control is changed according to the image content, and After the handshake is established with the first controller 14, the VbyOne display signal sent by the first controller 14 is received, and the VbyOne display signal is converted into an LVDS signal to realize the image display of the first display screen 201.

Among them, the second panel 21 is used to present the screen of the second display screen 202 to the user. In some embodiments, the second panel 21 may be a liquid crystal panel, and the specific structure included can refer to the description of the foregoing content, which will not be repeated here.

Wherein, the second backlight assembly 22 is located below the second panel 12, and is usually some optical components for supplying sufficient brightness and uniformly distributed light sources, so that the second panel 12 can display images normally. The second backlight assembly 22 also includes a second back plate (not shown in the figure).

Wherein, the second rear case 23 is covered on the second panel 21 to jointly hide the components of the display device 200 such as the second backlight assembly 22 and the second display driving circuit 24, which has a beautiful effect.

Wherein, the second display driving circuit 24 is disposed on the second backplane, and some convex hull structures are usually stamped on the second backplane. The second display driving circuit 24 is fixed on the convex hull by screws or hooks. The second display driving circuit 24 can be separately arranged on a board, such as a second display driving board, or it can be arranged on the same board together with the second backlight assembly 22, which can be set according to actual needs. This application does not Make a limit. For ease of description, the second display driving circuit 24 is separately provided on a board in FIG. 2a for illustration.

In some embodiments, FIG. 2a also includes a key pad. The key pad may be provided on the first backplane or the second backplane, which is not limited in this application. And a plurality of buttons and button circuits are provided on the button board, so that the first controller 14 or the second controller 15 can receive the button signal from the button board, and the first controller 14 or the second controller 15 can also send the button to the button. The board sends control signals.

In addition, the display device 200 also includes a sound reproduction device (not shown in the figure), such as an audio component, such as an I2S interface including a power amplifier (AMP) and a speaker (Speaker), for realizing sound reproduction. Generally, audio components can achieve sound output of at least two channels; when the panoramic sound surround effect is to be achieved, multiple audio components need to be set to output multiple channels of sound, which will not be described in detail here.

It should be noted that the display device 200 can also be an OLED display. Correspondingly, the template contained in the display device 200 is changed accordingly. For example, since the OLED display can realize self-luminescence, the OLED display does not require a backlight assembly (Figure 2a). The first backlight assembly 12 and the second backlight assembly 22) are not detailed here.

Or, as shown in FIG. 2a, a display device with dual display screens is taken as an exemplary illustration, and FIG. 2b exemplarily shows a schematic diagram of the hardware structure of a hardware system in the display device according to an exemplary embodiment.

Wherein, in the display device with a single display screen as shown in FIG. 2b, the display device includes: a panel 1, a backlight assembly 2, a rear case 3, a controller 4, a power supply assembly 5, and a base 6. Among them, the panel 1 is used to present images to the user; the backlight assembly 2 is located under the panel 1, usually some optical components, used to supply sufficient brightness and uniformly distributed light sources, so that the panel 1 can display image content normally, and the backlight assembly 2 It also includes a backplane 20. The controller 4 and the power supply assembly 5 are arranged on the backplane 20. Usually, some convex structures are stamped on the backplane 20, and the controller 4 and the power supply assembly 5 are fixed on the convex hulls by screws or hooks; The rear shell 3 is covered on the panel 1 to jointly hide the backlight assembly 2, the controller 4 and the power supply assembly 5 and other display device components, which has a beautiful effect; the base 6 is used to support the display device.

Among them, the controller 4 and the power supply assembly 5 can be separately arranged on a board, can also be arranged on the same board together, or can be arranged on the same board together with the backlight assembly, which can be set according to actual needs. Not limited. For ease of description, in FIG. 2b, the controller 4 and the power supply assembly 5 are jointly arranged on a board.

FIG. 3 shows a schematic diagram of the connection relationship between the power supply component and the load in FIG. 2a. As shown in FIG. 3, the power supply component 30 includes an input terminal IN and an output terminal OUT (the first output terminal OUT1 and the second output terminal OUT2 are shown in the figure. , The third output terminal OUT3\the fourth output terminal OUT4 and the fifth output terminal OUT5), where the input terminal IN is connected to an alternating current power supply AC (such as mains), and the output terminal OUT is connected to the load, for example, the first output terminal OUT1 Connected to the sound reproduction device, the second output terminal OUT2 is connected to the first panel 11/the second panel 21, the third output terminal OUT3 is connected to the first backlight assembly 12/the second backlight assembly 22, and the fourth output terminal OUT4 is connected to the first The controller 14/the second controller 15 are connected, and the fifth output terminal OUT5 is connected with the first display driving circuit 16/the second display driving circuit 24. Among them, the power supply assembly 30 needs to convert AC mains power into DC power required by the load, and the DC power usually has different specifications, for example, the audio component requires 18V, the first controller 14 requires 12V/18V, and so on.

This application can adopt a single power supply control structure, a dual power supply control structure, or a multi-power supply control structure. In the following, for ease of description, on the basis of the embodiment shown in FIG. 2a and in conjunction with FIG. 4, an example is given with a dual power supply control structure as an example.

Figure 4 shows a specific introduction of a power supply architecture in this application. 2a and 4, the power supply assembly 30 may be mainly composed of a first power supply circuit 31 and a second power supply circuit 32 connected in parallel. The structure of the first power supply circuit 31 and the second power supply circuit 32 are basically the same. Next, the first power supply circuit 31 is taken as an example to introduce the working principle in detail.

The first power supply circuit 31 may include a first rectification filter circuit, a first PFC circuit, and a first LLC circuit connected in sequence.

The first rectifying and filtering circuit may specifically include: a rectifying bridge and a filter. The rectifying bridge is used to rectify the input AC power and input a full-wave signal to a power factor correction (PFC) circuit. Before the AC power source AC is input into the first PFC circuit, an electromagnetic interference (Electromagnetic Interference, EMI) filter may be connected to perform high frequency filtering on the input AC power source.

The first PFC circuit generally includes a PFC inductor, a switching power device, and a PFC control chip. It mainly performs power factor correction on the input AC power (Alternating Current, AC), and outputs a stable DC bus voltage to the first resonant converter (LLC) circuit. (Such as 380V). The first PFC circuit can effectively improve the power factor of the power supply and ensure that the voltage and current are in the same phase.

The first LLC circuit may use a dual MOS tube LLC resonant conversion circuit, and may also include a pulse frequency modulation (Pulse frequency modulation, PFM) circuit, capacitors, inductors and other components. The first LLC circuit can specifically step down or step up the DC bus voltage input by the first PFC circuit, and output a constant voltage to the load. Here, the load may include the load as shown in FIG. 3. Generally, the first LLC circuit can output a variety of different voltages to meet the needs of the load. For example, the first LLC circuit supplies power to the first controller 14, the first LLC circuit supplies power to the first backlight assembly 12, and so on. For another example, the first controller 14 can also control the first LLC circuit to supply power (such as 12V or 12V) to the second controller 15, the first display drive circuit 16, the second display drive circuit 24, the keypad, and the second backlight assembly 22. 18V power supply voltage of equal magnitude) to ensure that each board can work.

In some embodiments, the first power supply circuit 31 may also include a first synchronous rectification circuit (not shown in the figure), which may include a transformer, a controller, two MOS transistors, and a diode. The circuit can directly output a stable target voltage. , Such as 12V or 18V, etc. It is worth noting that the first synchronous rectification circuit can be provided separately or in the first LLC circuit.

The first power supply circuit 31 may also include a relay for controlling power supply to the second power supply circuit 32.

The second power supply circuit 32 may include a second rectification filter circuit, a second PFC circuit, and a second LLC circuit connected in sequence. Wherein, the AC power of the second power circuit 32 is derived from the first power circuit 31 or commercial power, and the second LLC circuit can realize the power supply of the first backlight assembly 12 and so on. Refer to the introduction of the first power supply circuit 31 for the introduction of the remaining circuits. In some embodiments, the second power supply circuit 32 further includes a second synchronous rectification circuit, wherein the second synchronous rectification circuit can refer to the implementation form of the first synchronous rectification circuit.

It should be noted that the arrows in FIG. 4 are all used to indicate that the power supply assembly 30 directly or indirectly supplies power to other components of the display device 200 except for the power supply assembly. In addition, in addition to realizing power supply, the first power supply circuit 31 can also output a first backlight indication signal to the first display driving circuit 16. In addition to supplying power to the implementation, the second power supply circuit 32 may output a second backlight indication signal to the first display driving circuit 16.

The first backlight indication signal is used to instruct to turn on the backlight light source of the first area in the first display screen 201 (ie, the first panel 11). The second backlight indication signal is used to instruct to turn on the backlight light source of the second area in the first display screen 201 (ie, the first panel 11). The first area and the second area together constitute part or all of the area that can be displayed on the first display screen 201.

For ease of description, in the following, one hardware system in the dual hardware system architecture is referred to as the first hardware system or the first controller, and the other hardware system is referred to as the second hardware system or the second controller. The first controller includes various processors of the first controller, various interfaces, and various circuits connected to the first controller through various interfaces, and the second controller includes various processors of the second controller , Various interfaces, and various circuits connected to the second controller through various interfaces. A relatively independent operating system may be installed in the first controller and the second controller, and the operating system of the first controller and the operating system of the second controller may communicate with each other through a communication protocol, for example: the first controller The framework layer of the operating system of the second controller and the framework layer of the operating system of the second controller can communicate for command and data transmission, so that there are two independent but interrelated subsystems in the display device 200.

The dual hardware system architecture of the present application will be further described below in conjunction with FIG. 5. It should be noted that FIG. 5 is only an exemplary description of the dual hardware system architecture of the present application, and does not represent a limitation to the present application. In practical applications, both hardware systems can contain more or less hardware or interfaces as required.

Fig. 5 exemplarily shows a block diagram of the hardware architecture of the display device 200 shown in Fig. 2a. As shown in FIG. 5, the hardware system of the display device 200 includes a first controller 210 (ie, the first controller 14 in FIG. 2a) and a second controller 310 (ie, the second controller 15 in FIG. 2a). And circuits connected to the first controller 210 or the second controller 310 through various interfaces.

In some embodiments, the first controller 210 mainly implements traditional TV functions (for example, an external set-top box, etc.), and can control the first display screen 280 (ie, the first display screen 201 in FIG. 1) to display corresponding image content. The second controller 310 may be used to receive instructions sent by the first controller 210, and control the second display screen 380 (ie, the second display screen 202 in FIG. 1) to display corresponding image content.

The circuit connected to the first controller 210 may include a tuner and demodulator 220, a communicator 230, an external device interface 250, a memory 290, a user input interface 260-3, a video processor 260-1, an audio processor 260-2, The first display screen 280 (ie, the first display screen 201 in FIG. 2a), the audio output interface 270, and the power supply circuit 240. In other embodiments, the first controller 210 may also include more or less circuits connected.

Among them, the tuner and demodulator 220 is used to perform modulation and demodulation processing such as amplification, mixing, and resonance on the broadcast and television signals received through wired or wireless methods, so as to demodulate the user’s information from multiple wireless or cable broadcast and television signals. Select the audio and video signals carried in the frequency of the TV channel, as well as additional information (such as EPG data signals). According to different television signal broadcasting systems, the signal path of the tuner and demodulator 220 can have many kinds, such as: terrestrial broadcasting, cable broadcasting, satellite broadcasting or Internet broadcasting, etc.; and according to different modulation types, the signal adjustment method can be digitally modulated The method may also be an analog modulation method; and according to different types of received television signals, the tuner demodulator 220 may demodulate analog signals and/or digital signals.

The tuner and demodulator 220 is also used to respond to the TV channel frequency selected by the user and the TV signal carried by the frequency according to the user's selection and control by the first controller 210.

In some other exemplary embodiments, the tuner demodulator 220 may also be in an external device, such as an external set-top box. In this way, the set-top box outputs TV audio and video signals through modulation and demodulation, and inputs them to the display device 200 through the external device interface 250.

The communicator 230 is a component for communicating with external devices or external servers according to various communication protocol types. For example, the communicator 230 may include a WIFI circuit 231, a Bluetooth communication protocol circuit 232, a wired Ethernet communication protocol circuit 233, and an infrared communication protocol circuit and other network communication protocol circuits or near field communication protocol circuits (not shown in the figure).

The display device 200 may establish a control signal and a data signal connection with an external control device or content providing device through the communicator 230. For example, the communicator may receive a control signal of the remote controller 100 according to the control of the first controller 210.

The external device interface 250 is a component that provides data transmission between the first controller 210 and the second controller 310 or other external devices. The external device interface 250 can be connected to external devices such as set-top boxes, game devices, notebook computers, etc. in a wired/wireless manner, and can receive external devices such as video signals (such as moving images), audio signals (such as music), and additional information (such as EPG) and other data.

Among them, the external device interface 250 may include: a high-definition multimedia interface (HDMI) terminal is also called HDMI 251, a composite video blanking synchronization (CVBS) terminal is also called AV 252, and an analog or digital component terminal is also called component 253. , Any one or more of universal serial bus (USB) terminals 254, red, green and blue (RGB) terminals (not shown in the figure), etc. This application does not limit the number and types of external device interfaces.

The first controller 210 controls the work of the display device 200 and responds to user operations by running various software control programs (such as an operating system and/or various application programs) stored on the memory 290.

As shown in FIG. 5, the first controller 210 includes a read-only memory RAM 213, a random access memory ROM 214, a graphics processor 216, a CPU processor 212, a communication interface 218, and a communication bus. Among them, the RAM 213 and the ROM 214, the graphics processor 216, the CPU processor 212, and the communication interface 218 are connected by a bus.

ROM 213, used to store various system startup instructions. For example, when the power-on signal is received, the power of the display device 200 starts to start, and the CPU processor 212 runs the system start-up instruction in the ROM, and copies the operating system stored in the memory 290 to the RAM 214 to start the operating system. After the operating system is started, the CPU processor 212 copies various application programs in the memory 290 to the RAM 214, and then starts to run and start various application programs.

The graphics processor 216 is used to generate various graphics objects, such as icons, operation menus, and user input instructions to display graphics. Including an arithmetic unit, which performs operations by receiving various interactive commands input by the user, and displays various objects according to the display attributes. It also includes a renderer, which generates various objects obtained based on the arithmetic unit, and displays the result of the rendering on the first display screen 280.

The CPU processor 212 is configured to execute operating system and application program instructions stored in the memory 290. And according to receiving various interactive instructions input from the outside, to execute various application programs, data and content, so as to finally display and play various audio and video content.

In some exemplary embodiments, the CPU processor 212 may include multiple processors. The multiple processors may include one main processor and multiple or one sub-processors. The main processor is used to perform some operations of the display device 200 in the pre-power-on mode, and/or to display images in the normal mode. Multiple or one sub-processor, used to perform an operation in the standby mode and other states.

The communication interface 218 may include a first interface 218-1 to an nth interface 218-n. These interfaces may be network interfaces connected to external devices via a network.

The first controller 210 may control operations of the display device 200 related to the first display screen 280. For example, in response to receiving a user command for selecting a UI object to be displayed on the first display screen 280, the first control screen 210 may perform an operation related to the object selected by the user command.

The first controller 210 may control the operation of the display device 200 related to the second display screen 380. For example, in response to receiving a user command for selecting a UI object to be displayed on the second display screen 380, the first control screen 210 may perform an operation related to the object selected by the user command.

Wherein, the object may be any one of the selectable objects, such as a hyperlink or an icon. Operations related to the selected object, for example: display operations connected to hyperlink pages, documents, images, etc., or perform operations corresponding to the icon. The user command for selecting the UI object may be a command input through various input devices (e.g., mouse, keyboard, touch pad, etc.) connected to the display device 200 or a voice command corresponding to the voice spoken by the user.

The memory 290 includes storing various software circuits for driving and controlling the display device 200. For example, various software circuits stored in the memory 290 include: basic circuits, detection circuits, communication circuits, display control circuits, browser circuits, and various service circuits (not shown in the figure).

Among them, the basic circuit is a low-level software circuit used for signal communication between various hardware in the display device 200 and sending processing and control signals to the upper-level circuit. The detection circuit is a management circuit used to collect various information from various sensors or user input interfaces, and perform digital-to-analog conversion, analysis and management. The voice recognition circuit includes a voice analysis circuit and a voice command database circuit. The display control circuit is a circuit for controlling the first display screen 280 to display image content, and can be used to play information such as multimedia image content and UI interfaces. The communication circuit is a circuit used for control and data communication with external devices. The browser circuit is a circuit used to perform data communication between browsing servers. The service circuit is a circuit used to provide various services and various applications.

At the same time, the memory 290 is also used to store and receive external data and user data, images of various items in various user interfaces, and visual effect diagrams of focus objects, and the like.

The user input interface 260-3 is used to send a user's input signal to the first controller 210, or to transmit a signal output from the first controller 210 to the user. Exemplarily, the control device (such as a mobile terminal or a remote control) can send input signals input by the user, such as a power switch signal, a channel selection signal, and a volume adjustment signal, to the user input interface, and then forward the input signal to the user input interface 260-3. The first controller 210; or, the control device may receive output signals such as audio, video, or data output from the user input interface 260-3 processed by the first controller 210, and display the received output signal or output the received output signal It is in the form of audio or vibration.

In some embodiments, the user may input a user command on a graphical user interface (GUI) displayed on the first display screen 280, and the user input interface 260-3 receives the user input command through the graphical user interface (GUI). Alternatively, the user may input a user command by inputting a specific sound or gesture, and the user input interface 260-3 recognizes the sound or gesture through a sensor to receive the user input command.

The video processor 260-1 is used to receive video signals, and perform video data processing such as decompression, decoding, scaling, noise reduction, frame rate conversion, resolution conversion, and image synthesis according to the standard codec protocol of the input signal. The video signal is directly displayed or played on the first display screen 280.

Illustratively, the video processor 260-1 includes a demultiplexing circuit, a video decoding circuit, an image synthesis circuit, a frame rate conversion circuit, a display formatting circuit, etc. (not shown in the figure).

Among them, the demultiplexing circuit is used to demultiplex the input audio and video data stream. For example, if MPEG-2 is input, the demultiplexing circuit will demultiplex into a video signal and an audio signal.

The video decoding circuit is used to process the demultiplexed video signal, including decoding and scaling.

An image synthesis circuit, such as an image synthesizer, is used to superimpose and mix the GUI signal generated by the graphics generator with the zoomed video image according to user input or itself to generate an image signal for display.

Frame rate conversion circuit, used to convert the frame rate of the input video, such as converting the frame rate of the input 24Hz, 25Hz, 30Hz, 60Hz video to the frame rate of 60Hz, 120Hz or 240Hz, where the input frame rate can be the same as the source The video stream is related, and the output frame rate can be related to the refresh rate of the display device. The display formatting circuit is used to change the signal output by the frame rate conversion circuit into a signal conforming to the display format of a display device, for example, format the signal output by the frame rate conversion circuit to output RGB data signals.

The first display screen 280 is used to receive the image signal input from the video processor 260-1, display video content and images, and the menu control interface. The first display screen 280 includes a display screen component for presenting images and driving image display Drive components. The displayed video content can be from the video in the broadcast signal received by the tuner and demodulator 220, or from the video content input by the communicator or the interface of an external device. The first display screen 280 simultaneously displays a user manipulation interface UI generated in the display device 200 and used to control the display device 200.

And, depending on the type of the first display screen 280, it also includes a driving component for driving the display. Alternatively, if the first display screen 280 is a projection display screen, it may also include a projection device and a projection screen.

The audio processor 260-2 is used to receive audio signals, and perform decompression and decoding according to the standard codec protocol of the input signal, as well as audio data processing such as noise reduction, digital-to-analog conversion, and amplification processing, so that it can be played in the speaker 272 Audio signal.

The audio output interface 270 is used to receive the audio signal output by the audio processor 260-2 under the control of the first controller 210. The audio output interface may include a speaker 272, or output to an external audio output terminal 274 of a generator of an external device , Such as: external audio terminal or headphone output terminal, etc.

In some other exemplary embodiments, the video processor 260-1 may include one or more chips. The audio processor 260-2 may also include one or more chips.

And, in some other exemplary embodiments, the video processor 260-1 and the audio processor 260-2 may be separate chips, or may be integrated with the first controller 210 in one or more chips.

The power supply circuit 240 is configured to provide power supply support for the display device 200 with power input from an external power supply under the control of the first controller 210. The power supply circuit 240 may include a built-in power supply circuit installed inside the display device 200, or may be a power supply installed outside the display device 200, such as a power interface for providing an external power supply in the display device 200.

Similar to the first controller 210, as shown in FIG. 5, the circuit connected to the second controller 310 may include a communicator 330, a detector 340, a memory 390, and a second display screen 380 (ie, the second display in FIG. Display 202). In some embodiments, it may also include a user input interface, a video processor, an audio processor, and an audio output interface (not shown in the figure). In some embodiments, there may also be a power supply circuit (not shown in the figure) that independently supplies power to the second controller 310.

The communicator 330 is a component for communicating with external devices or external servers according to various communication protocol types. For example, the communicator 330 may include a WIFI circuit 331, a Bluetooth communication protocol circuit 332, a wired Ethernet communication protocol circuit 333, and an infrared communication protocol circuit and other network communication protocol circuits or near field communication protocol circuits (not shown in the figure).

The communicator 330 of the second controller 310 and the communicator 230 of the first controller 210 also interact with each other. For example, the WiFi circuit 231 in the hardware system of the first controller 210 is used to connect to an external network, and to generate network communication with an external server or the like. The WiFi circuit 331 in the hardware system of the second controller 310 is used to connect to the WiFi circuit 231 of the first controller 210 without direct connection with the external network, etc., and the second controller 310 connects to the external network through the first controller 210 . Therefore, for the user, a display device as in the above embodiment may display a WiFi account to the outside.

The detector 340 is a component used by the second controller 310 to collect signals from the external environment or interact with the outside. The detector 340 may include a light receiver 342, a sensor used to collect the intensity of ambient light, which can adaptively display parameter changes by collecting ambient light, etc.; it may also include an image collector 341, such as a camera, a camera, etc., which can be used to collect external The environment scene, as well as the user's attributes or gestures used to interact with the user, can adaptively change the display parameters, and can also recognize the user's gestures to achieve the function of interaction with the user.

The external device interface 350 provides a component for data transmission between the second controller 310 and the first controller 210 or other external devices. The external device interface can be connected to external devices such as set-top boxes, game devices, notebook computers, etc., in a wired/wireless manner.

The video processor 360 is used to process related video signals.

The second controller 310 controls the work of the display device 200 and responds to the user by running various software control programs (such as installed third-party applications, etc.) stored on the memory 390 and interacting with the first controller 210. Operation.

As shown in FIG. 5, the second controller 310 includes a read-only memory ROM 313, a random access memory RAM 314, a graphics processor 316, a CPU processor 312, a communication interface 318, and a communication bus. Among them, the ROM 313 and the RAM 314, the graphics processor 316, the CPU processor 312, and the communication interface 318 are connected by a bus.

ROM 313, used to store various system startup instructions. The CPU processor 312 runs the system startup instruction in the ROM, and copies the operating system stored in the memory 390 to the RAM 314 to start the operating system. After the operating system is started, the CPU processor 312 copies the various application programs in the memory 390 to the RAM 314, and then starts to run and start the various application programs.

The CPU processor 312 is used to execute operating system and application instructions stored in the memory 390, communicate with the first controller 210, transmit and interact with signals, data, instructions, etc., and receive various interactive instructions from external inputs. , To execute a variety of applications, data and content, in order to finally display and play a variety of audio and video content.

There are multiple communication interfaces 318, which may include a first interface 318-1 to an nth interface 318-n. These interfaces may be network interfaces connected to external devices via a network, or network interfaces connected to the first controller 210 via a network.

The second controller 310 may control operations of the display device 200 related to the second display screen 380. For example, in response to receiving a user command for selecting a UI object to be displayed on the second display screen 380, the second controller 310 may perform an operation related to the object selected by the user command.

The second controller 310 may control the operation of the display device 200 related to the first display screen 280. For example, in response to receiving a user command for selecting a UI object to be displayed on the first display screen 280, the first controller 210 may perform an operation related to the object selected by the user command.

The graphics processor 316 is used to generate various graphics objects, such as icons, operation menus, and user input instructions to display graphics. Including an arithmetic unit, which performs operations by receiving various interactive commands input by the user, and displays various objects according to the display attributes. It also includes a renderer, which generates various objects obtained based on the arithmetic unit, and displays the result of the rendering on the second display screen 380.

Both the graphics processor 316 of the second controller 310 and the graphics processor 216 of the first controller 210 can generate various graphics objects. Differentily, if application 1 is installed in the second controller 310 and application 2 is installed in the first controller 210, when the user is on the interface of application 1, and the user inputs instructions in the application 1, the second controller 310 The graphics processor 316 generates graphics objects. When the user is on the interface of the application 2 and performs the user-input instruction in the application 2, the graphics processor 216 of the first controller 210 generates a graphic object.

Fig. 6 exemplarily shows a schematic diagram of a functional configuration of a display device according to an exemplary embodiment.

As shown in FIG. 6, the memory 390 of the second controller 310 and the memory 290 of the first controller 210 are respectively used to store an operating system, application programs, content, and user data. Under the control of 210, the system operation of driving the first display screen 280 and the second display screen 380 and responding to various operations of the user are executed. The memory 390 of the second controller 310 and the memory 290 of the first controller 210 may include volatile and/or nonvolatile memory.

For the first controller 210, the memory 290 is specifically used to store the operating program of the first controller 210 in the driving display device 200, and store various application programs built in the display device 200, and various application programs downloaded by the user from an external device , And various graphical user interfaces related to the application, as well as various objects related to the graphical user interface, user data information, and various internal data supporting the application. The memory 290 is used to store system software such as an operating system (OS) kernel, middleware, and applications, as well as to store input video data and audio data, and other user data.

The memory 290 is specifically used to store driver programs and related data such as the video processor 260-1 and the audio processor 260-2, the first display screen 280, the communicator 230, the tuner and demodulator 220, and the input/output interface.

In some embodiments, the memory 290 may store software and/or programs. The software programs used to represent an operating system (OS) include, for example, kernels, middleware, application programming interfaces (APIs), and/or application programs. Exemplarily, the kernel may control or manage system resources, or functions implemented by other programs (such as the middleware, API, or application program), and the kernel may provide interfaces to allow middleware and APIs, or applications to access the controller , In order to achieve control or management of system resources.

For example, the memory 290 includes a broadcast receiving circuit 2901, a channel control circuit 2902, a volume control circuit 2903, an image control circuit 2904, a display control circuit 2905, a first audio control circuit 2906, an external command recognition circuit 2907, a communication control circuit 2908, The light receiving circuit 2909, the power control circuit 2910, the operating system 2911, and other application programs 2912, the browser circuit 2913, and so on. The first controller 210 executes various software programs in the memory 290 such as: broadcast and television signal reception and demodulation function, TV channel selection control function, volume selection control function, image control function, display control function, audio control function, Various functions such as external command recognition function, communication control function, optical signal receiving function, power control function, software control platform supporting various functions, and browser function.

The memory 390 includes storing various software circuits for driving and controlling the display device 200. For example, various software circuits stored in the memory 390 include: basic circuits, detection circuits, communication circuits, display control circuits, browser circuits, and various service circuits (not shown in the figure). Since the functions of the memory 390 and the memory 290 are relatively similar, please refer to the memory 290 for related parts, which will not be repeated here.

For example, the memory 390 includes an image control circuit 3904, a second audio control circuit 3906, an external command recognition circuit 3907, a communication control circuit 3908, a light receiving circuit 3909, an operating system 3911, and other application programs 3912, a browser circuit 3913, etc. . The first controller 210 executes various software programs in the memory 290 such as: image control function, display control function, audio control function, external command recognition function, communication control function, light signal receiving function, power control function, support Various functions such as software control platform and browser functions.

Differently, the external command recognition circuit 2907 of the first controller 210 and the external command recognition circuit 3907 of the second controller 310 can recognize different commands.

Exemplarily, because the image receiving device such as a camera is connected to the second controller 310, the external command recognition circuit 3907 of the second controller 310 may include a pattern recognition circuit 2907-1, and the pattern recognition circuit 3907-1 stores a pattern. Database, when the camera receives graphics instructions from the outside world, it will correspond to the instructions in the graphics database to control the display device. Since the voice receiving device and the remote controller are connected to the first controller 210, the external command recognition circuit 2907 of the first controller 210 may include a voice recognition circuit 2907-2, and a voice database is stored in the voice recognition circuit 2907-2. When the voice receiving device or the like receives a voice instruction from the outside world, it corresponds to the instruction in the voice database to control the display device. Similarly, the control device 100 such as a remote controller is connected to the first controller 210, and the key command recognition circuit 2907-3 interacts with the control device 100 in command.

Hereinafter, the specific structure of the display device will be described in detail through specific embodiments.

FIG. 7 is a schematic structural diagram of a display device provided by an embodiment of the application. As shown in FIG. 7, the display device 700 of the present application may include: a display screen 701, a backlight assembly 702, a power supply assembly 703, a TCON circuit 704, a backlight drive circuit 705, and a controller 706. The power supply assembly 703 may be provided with a first power supply. The circuit 7031 and the second power supply circuit 7032.

The power supply component 703 may also be provided with a power supply switching circuit 7033. The input end of the first power supply circuit 7031 is connected to a power supply device, and the input end of the first power supply circuit 7031 is also connected to the second power supply circuit 7032 through the power supply switching circuit 7033.

In this application, the display device 700 may be the display device 200 in FIG. 1, such as a liquid crystal display, or may be other forms of display devices, which is not limited in this application. The display device 700 may include one display screen or multiple display screens, which is not limited in this application. For example, when there are two display screens in the display device 700, the two display screens may be the first display screen 201 and the second display screen 202 in FIG. 1.

Wherein, the display screen 701 may be any one of the display devices 700 for displaying image content, and the implementation form of the display screen 701 is not limited in this application. For example, the display screen 701 may be the first display screen 280 in FIG. 5, and may be set on the first display screen 201 mentioned above. The display screen 701 may also be the second display screen 380 in FIG. 5, and may be provided on the second display screen 202 mentioned above.

Among them, the backlight assembly 702 is the first backlight assembly 12 or the second backlight assembly 22 mentioned above, and the specific implementation form of the backlight assembly 702 is not limited in this application. And the backlight assembly 702 is used to provide a backlight light source to the display screen 701 so that the display screen 701 can display image content.

The power supply component 703 is used to provide power to the display device 700, and the power supply component 703 may include a first power supply circuit 7031 and a second power supply circuit 7032. The first power supply circuit 7031 and the second power supply circuit 7032 may be arranged on one board, or may be separately arranged on different boards, which is not limited in this application.

Those skilled in the art can understand that in order for the display device 700 to achieve a clear display image, the backlight light source in the backlight assembly 702 needs to be very bright. Therefore, in the present application, the first power supply circuit 7031 and the second power supply circuit 7032 are respectively used to supply power to the backlight light source in the backlight assembly 702, so that the backlight light source reaches the required brightness, and ensures that the display device 700 has a higher picture quality.

Wherein, the backlight light source may include, but is not limited to, a light emitting diode (LED) or a cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamp, CCFL) and other backlight strips.

In order to ensure the picture quality of the display device 200, the display device 200 adopts a thousand-level backlight zone control based on the screen content. In some embodiments, the present application divides the display area of the display screen 701 into a first area and a second area. And this application does not limit the division of the display area.

For example, the first area is located in the upper half of the displayable area of the display screen 701, and the second area is located in the lower half of the displayable area of the display screen 701. Alternatively, the first area is located in the left half of the displayable area of the display screen 701, and the second area is located in the right half of the displayable area of the display screen 701.

The first power supply circuit 7031 is similar to the function of the first power supply circuit 31 mentioned above. The first power supply circuit 7031 can be provided on the power supply assembly 30 shown in FIG. 2a to provide information to the controller 706 and the second power supply circuit 7032. The backlight driving circuit 705 and the backlight light source located in the first area in the backlight assembly 702 supply power. In addition, the first power circuit 7031 can also transmit a first backlight indication signal (not shown in FIG. 7) to the backlight driving circuit 705, and the first backlight indication signal is used to instruct the backlight driving circuit 705 to turn on the backlight light source of the first area.

Wherein, the first power circuit 7031 supplies power to the backlight light source located in the first area of the backlight assembly 702, which is achieved by the first power circuit 7031 providing the backlight driving circuit 705 with the power required by the backlight light source located in the first area of the backlight assembly 702的 (not shown in Figure 7). In addition, this application does not limit the specific implementation form of the first power supply circuit 7031. In addition, the first power supply circuit 7031 can also supply power to a sound reproduction device (not shown in FIG. 7) such as an audio component in the display device 700.

The second power supply circuit 7032 has similar functions to the second power supply circuit 32 mentioned above. The second power supply circuit 7032 can be provided on the power supply assembly 30 shown in FIG. The backlight light source in the second area supplies power. In addition, the second power supply circuit 7032 can also transmit a second backlight instruction signal (not shown in FIG. 7) to the backlight drive circuit 705, and the second backlight instruction signal is used to instruct the backlight drive circuit 705 to turn on the backlight light source in the second area, And the first area and the second area together constitute part or all of the area that can be displayed on the display screen 701.

Wherein, the second power circuit 7032 supplies power to the backlight light source located in the second area of the backlight assembly 702, which is achieved by providing the backlight assembly 702 with the power required by the backlight drive circuit 705 through the second power circuit 7032 (not shown in FIG. 7). ). In addition, this application does not limit the specific implementation form of the second power supply circuit 7032. In addition, the second power supply circuit 7032 can also supply power to a sound reproduction device (not shown in FIG. 7) such as an audio component in the display device 700.

The controller 706 may be the first controller 210 mentioned above, or other system-on-chip (SOC), and the specific implementation form of the controller 706 is not limited in this application. And the controller 706 can transmit a backlight driving signal to the backlight driving circuit 705 (signal 3 is used for illustration in FIG. 7), so that the backlight driving circuit 705 can control the overall brightness and local brightness of the backlight light source in the backlight assembly 702 based on the backlight driving signal. Backlight effect.

For example, the backlight drive signal may include a PWM signal and a Localdimming signal. The PWM signal is used to control the overall brightness of the backlight light source in the backlight assembly 702, and the Localdimming signal is used to control the backlight light source in the backlight assembly 702 based on the image content displayed on the display screen 701. Local brightness. The PWM signal can be indirectly sent by the controller 706 to the backlight driving circuit 705 through the first power supply circuit 7031, or directly sent by the controller 706 to the backlight driving circuit 705. In order to ensure that the Localdimming signal is not interfered by other signals, the Localdimming signal is usually sent directly by the controller 706 to the backlight driving circuit 705.

Wherein, the TCON circuit 704 may be provided in the first display driving circuit 16 mentioned above, and the specific implementation form of the TCON circuit 704′ is not limited in this application. After the second power supply circuit 7032 supplies power to the TCON circuit 704, the TCON circuit 704 can prepare the data to be displayed for the display screen 701, and present image content for driving the display screen 701. Generally, the TCON circuit 704 after power supply can shake hands with the controller 706. After the handshake, the TCON circuit 704 can receive the VbyOne display signal from the controller 706, and can convert the VbyOne display signal into an LVDS signal, and with the cooperation of the backlight driving circuit 705, the corresponding image content can be displayed on the display screen 701.

Wherein, the backlight driving circuit 705 may be provided in the first display driving circuit 16 mentioned above, and the specific implementation form of the backlight driving circuit 705 is not limited in this application. The backlight driving circuit 705 can provide power to the backlight assembly 702 to turn on the backlight light source according to the first backlight instruction signal and the second backlight instruction signal, and can control the brightness of the backlight light source in the backlight assembly 702 according to the backlight drive signal.

Since the standby power consumption of the display device 700 is among the power consumption of the display screen 701, the backlight assembly 702, the power supply assembly 703 (the first power supply circuit 7031 and the second power supply circuit 7032), the TCON circuit 704, the backlight drive circuit 705, and the controller 706 with. Those skilled in the art can understand that in the standby mode of the display device 700, the display screen 701, the backlight assembly 702, the TCON circuit 704, the backlight driving circuit 705, and the controller 706 hardly work, and the power consumption is close to zero. Therefore, the standby power consumption of the display device 700 mainly includes the sum of the power consumption of the first power supply circuit 7031 and the second power supply circuit 7032.

In this application, after the AC power supply AC provided by the power supply device is powered on, the display device 700 enters the standby mode. At this time, based on the connection of the input terminal of the first power supply circuit 7031 with the power supply device, the first power supply circuit 7031 is energized and starts to work. And because in the standby mode of the display device 700, the display screen 701, the backlight assembly 702, the TCON circuit 704, the backlight drive circuit 705, and the controller 706 hardly work and the load is small, therefore, the first power supply circuit 7031 will enter the frequency hopping Mode in order to meet the power demand of a smaller load, so that the power consumption of the first power supply circuit 7031 is minimized.

At this time, since the input terminal of the second power supply circuit 7032 is not connected to the power supply device, the second power supply circuit 7032 is not powered on, or the controller 706 may control the second power supply circuit 7032 to be powered off.

In some embodiments, based on that the input terminal of the first power supply circuit 7031 is connected to the input terminal of the second power supply circuit 7032 through the power supply switching circuit 7033, the second power supply circuit 7032 needs to rely on the controller 706 to turn off the power supply switching circuit 7033, Only then can it be disconnected from the power supply device, so that the second power supply circuit 7032 is not energized and cannot start working. Therefore, the power consumption of the second power supply circuit 7032 is the smallest, and thus, the standby power of the display device 700 is the smallest, so that the standby power of the display device 700 is reduced.

When the second power supply circuit 7032 is required to provide power, the controller 706 can control the first power supply circuit 7031 to supply power to the second power supply circuit 7032 so that the second power supply circuit 7032 can supply power to the remaining components in the display device. In some embodiments, the controller 706 may turn on the power supply switching circuit 7033, so that the first power supply circuit 7031 supplies power to the second power supply circuit 7032, so that the second power supply circuit 7032 conducts and starts to work.

Based on the foregoing description and in conjunction with FIGS. 1 to 6, in order to enable the display device 200 to have a higher picture quality and brightness index, the display device 200 needs to provide a larger power to the backlight assembly. Therefore, when the display device 200 uses a larger overall power in the present application, the power supply assembly 30 usually adopts a dual power supply architecture for power supply. For example, the dual power supply architecture may include the first power supply circuit 31 and the second power supply circuit connected in parallel in FIG. 4 32 to meet the power supply requirements and picture quality of the display device 200. For example, the overall power required by the display device 200 is 700W, and the power supply assembly 30 uses two single boards placed in parallel to output 350W respectively.

In addition, when the display device is powered on, the first power circuit can be energized and start working, and the second power circuit cannot start working when the second power circuit is not energized, so that the display device enters the standby mode and saves the standby mode of the display device. power. Among them, the superposition of the power consumption of the first power supply circuit and the second power supply circuit during standby is the main component of the standby power of the display device. Based on the above description, the present application provides a display device that can control the startup sequence of the first power circuit and the second power circuit, which can not only solve the problem of large standby power consumption, but also ensure that the display device has high picture quality. Make the brightness index of the display device meet the display demand. Moreover, when the display device needs power from the second power circuit, the controller can control the first power circuit to supply power to the second power circuit, so that the second power circuit can provide power to the display device, facilitating the use of the display device.

Continuing to combine with FIG. 7, the first power supply circuit 7031 after startup is based on the first power supply pin of the first power supply circuit 7031 (represented by the number 31 in FIG. 7) and the power supply pin of the controller 706 (by the number 11 in FIG. 7). Indicates the connection between), which can supply power to the controller 706, so that the controller 706 can work normally.

On the one hand, the powered controller 706 can control the first power supply circuit 7031, based on the second power supply pin (represented by the number 32 in FIG. 7) of the first power supply circuit 7031 and the first power supply pin ( 7 in FIG. 7 denoted by the number 21), the backlight driving circuit 705 starts to provide power to the backlight light source located in the first area in the backlight assembly 702, so that the backlight light source located in the first area in the backlight assembly 702 can be turned on.

On the other hand, the powered controller 706 can also control the power supply device or the first power supply circuit 7031 to supply power to the second power supply circuit 7032 through the power supply switching circuit 7033, so that the second power supply circuit 7032 starts to start. Therefore, the activated second power supply circuit 7032 is based on the power supply pin of the second power supply circuit 7032 (represented by the number 33 in FIG. 7) and the second power supply pin of the backlight driving circuit 705 (represented by the number 22 in FIG. 7) With the connection between, the backlight driving circuit 705 can start to supply power to the backlight light source located in the second area in the backlight assembly 702, so that the backlight light source located in the second area in the backlight assembly 702 can be turned on.

In the present application, the backlight light source in the backlight assembly 702 is powered by the first power circuit 7031 and the second power circuit 7032, which increases the power supply of the backlight light source in the backlight assembly 702, so that the backlight light source in the backlight assembly 702 has a higher brightness and improves The picture quality of the display device 700 is improved.

In the display device provided by the present application, when the display device is powered on, the first power circuit can be powered on and start to work, and the second power circuit is not powered on and cannot start to work, so that the display device enters a standby mode and saves the standby power of the display device. .

Based on the connection between the first power supply circuit and the backlight driving circuit, the controller can control the first power supply circuit to provide the backlight driving circuit with the power of the backlight power supply located in the first area of the backlight assembly.

Based on the connection between the first power supply circuit and the second power supply circuit through the power supply switching circuit and the connection between the second power supply circuit and the backlight drive circuit, the controller can control the second power supply circuit to provide the backlight drive circuit with the backlight in the second area of the backlight assembly With the power of the power source, the first area and the second area constitute the display area of the display screen, so that the backlight assembly can turn on the backlight light source under the power of the first power circuit and the second power circuit.

In this application, by controlling the startup sequence of the first power circuit and the second power circuit, the standby power consumption of the display device is saved, and the power of the first power circuit and the second power circuit to the backlight power supply in the backlight assembly is realized. The power supply process of the dual power supply to the backlight assembly is improved, the power supply of the display device is increased, the brightness of the backlight light source in the backlight assembly is ensured, the backlight effect of the display device is guaranteed, and the picture quality of the display device is improved.

With reference to Figures 1 to 6, the first power supply circuit 31 and the second power supply circuit 32 are respectively connected to the power supply equipment (the AC power supply AC input in Figure 4 is provided by the power supply equipment, and the power supply equipment is not shown in Figure 4) at the front end positions (As shown in Figure 4, the connection between the AC power supply AC and the first rectifier filter circuit and the connection between the relay and the second rectifier filter circuit) is usually provided with a thermistor, and the thermistor is connected in series with the live wire (L) or the neutral wire (N). )on. When the display device 200 is powered on, the thermistor can achieve current limiting, and the thermistor will pass the corresponding surge current generated by the first power circuit 31 or the second power circuit 32, avoiding the impact of the surge current. The influence caused by the back-end components such as the rectifier circuit and the electrolytic capacitor in the first power circuit 31 or the second power circuit 32. However, when the power supply assembly 30 works normally at a relatively high power, the thermistor will pass a relatively large current, which may easily cause the thermistor to overheat and be damaged.

Based on the above description, the display device 700 of the present application can not only solve the problem of large standby power consumption and achieve higher picture quality and brightness indicators of the display device 700, but also can achieve current limiting through the thermistor, so that the power supply component The generated surge current can pass through the thermistor to protect the first power circuit and the second power circuit. After the surge current flows through the thermistor, the thermistor can be short-circuited to avoid large The phenomenon that the current passes through the thermistor and damages the thermistor, which prolongs the service life of the thermistor.

Continuing with FIG. 7, after the AC power supply AC provided by the power supply device is powered on, the first power supply circuit 7031 is connected to the power supply device, and the first power supply circuit 7031 is powered on and starts to work, while the second power supply circuit 7032 is not powered on. After the first power supply circuit 7031 starts to work, the display device 700 enters the standby mode, the strobe (STB) pin of the controller 706 is at the first level at this time, and the STB pin of the controller 706 and the STB pin of the first power circuit 7031 The pins are connected so that the STB pin of the first power supply circuit 7031 is also at the first level. In this way, the power consumption on the controller 706 is minimal, and the first power supply circuit 7031 enters the frequency hopping mode to meet the power demand of a smaller load. The power consumption of the first power supply circuit 7031 is minimized, and the second power supply circuit 7032 is not energized, so that the standby power of the display device 700 is minimized.

Based on the above description, after the display device 700 is turned on, the current of the first power circuit 7031 is relatively small, and the first thermistor RT1 in the first power circuit 7031 (not shown in FIG. 7 and the first thermistor RT1 in FIG. 8 The resistor RT1 is connected in series on the live wire or the neutral wire of the power supply device for illustration) is connected in series between the power supply device and the first power supply circuit 7031. Therefore, at this time, the first power circuit 7031 does not need to short-circuit the first thermistor RT1, and the first power circuit 7031 needs to supply power to the controller 706. At this time, the controller 706 outputs the first signal (ie STB signal) to the STB pin of the first power supply circuit 7031 through the STB pin of the controller 706, and the STB pin of the first power supply circuit 7031 is at the second level. . Among them, the first level and the second level are opposite in level. For example, the first level is the low level of the STB signal, and the second level is the high level of the STB signal.

In this way, the first power circuit 7031 can control the first thermistor RT1 in the first power circuit 7031 to be connected in series between the power supply device and the first power circuit 7031 according to the first signal, so that the wave generated by the first power circuit 7031 is The inrush current passes through the first thermistor RT1 to protect the back-end components in the first power circuit 7031.

In addition, the first power supply pin (indicated by the number 31 in FIG. 7) of the first power supply circuit 7031 is connected to the power supply pin (indicated by the number 11 in FIG. 7) of the controller 706 to start normal power supply to the controller 706. , So that the controller 706 can work normally. The second power supply pin of the first power supply circuit 7031 (indicated by the number 32 in FIG. 7) is connected to the first power supply pin (indicated by the number 21 in FIG. 7) of the backlight assembly 702 to start providing the backlight drive circuit 705 The power of the backlight light source located in the first area in the backlight assembly 702 makes the backlight driving circuit 705 ready to turn on the backlight light source.

When the backlight light source of the backlight assembly 702 is ready to be turned on, because the large electrolysis (such as the components that implement the rectification and filtering function) in the first power circuit 7031 has been fully charged before the first thermistor RT1 is short-circuited, the controller 706 can control the first power circuit 7031 to short-circuit the first thermistor RT1, so that no surge current is generated in the first power circuit 7031. Furthermore, the switch (SW) pin of the controller 706 can output a second signal (ie, SW signal) to the SW pin of the first power supply circuit 7031 through the connection with the SW pin of the first power supply circuit 7031. At this time, According to the second signal, the first power circuit 7031 controls the first thermistor RT1 to be short-circuited and connected between the power supply device and the first power circuit 7031, short-circuits the first thermistor RT1, and disconnects the first thermistor RT1. , To prevent the first thermistor RT1 from overheating and damage, and play a role in protecting the first thermistor RT1. In this way, the first thermistor RT1 not only protects the first power supply circuit 7031, but also does not damage itself due to overheating.

Wherein, the second signal may be a high level or a low level, which is not limited in this application.

It should be noted that the STB pin of the controller 706, the power supply pin of the controller 706, and the SW pin of the controller 706 may use one or more input or output ports. The STB pin of the first power circuit 7031, the power supply pin of the first power circuit 7031, and the SW pin of the first power circuit 7031 may use one or more input or output ports.

In this application, after the first power supply circuit starts to work, because the standby power of the display device is small at this time, so that the current generated in the first power supply circuit is small. Therefore, the first thermistor does not need to be short-circuited, and the first The power circuit needs to supply power to the controller. Based on the connection between the first power supply circuit and the controller, the first power supply circuit can receive the first signal from the controller, so that the first power supply circuit can control the first thermistor to be connected in series between the power supply device and the first power supply according to the first signal. Between the circuits, the first power supply circuit respectively supplies power to the controller and provides power to the backlight drive circuit of the backlight assembly and the backlight light source located in the first area of the backlight assembly.

When the backlight light source of the backlight assembly is ready to be turned on, since the large electrolysis in the first power circuit is fully charged before the first thermistor is short-circuited, no surge current is generated in the first power circuit. Furthermore, according to the second signal output by the controller chip, the first power circuit can control the first thermistor to be short-circuited between the power supply device and the first power circuit to short-circuit the first thermistor and prevent the first thermistor Damaged by overheating, it plays a role in protecting the first thermistor. In this way, the first thermistor not only plays a role in protecting the first power circuit, but also does not damage itself due to overheating.

In this application, the control terminal of the power supply switching circuit 7033 (indicated by the letter K in FIG. 7) can be connected to the first power circuit 7031, can also be connected to the controller 706, and can also be connected to the first power circuit 7031 and the controller 706 respectively. Connection, this application does not limit this.

Based on the above description, the power supply switching circuit 7033 may receive the second signal from the first power supply circuit 7031 or the controller 706 after power supply. In addition, the power supply switching circuit 7033 can control the first power supply circuit 7031 to supply the voltage input by the power supply device to the second power supply circuit 7032 according to the second signal.

Among them, the power supply switching circuit 7033 functions as a switch, which is used to implement the first power supply circuit 7031 to supply power to the second power supply circuit 7032 or to stop power supply. The power supply switching circuit 7033 can be provided in the first power circuit 7031, in the second power circuit 7032, and can also be provided in the first power circuit 7031 and the second power circuit 7032 at the same time, which is not limited in this application.

In this application, the SW pin of the second power circuit 7032 can be connected to the first power circuit 7031, can also be connected to the controller 706, and can also be connected to the first power circuit 7031 and the controller 706 respectively. This application does not Make a limit. Based on the above description, the second power supply circuit 7032 may receive the second signal from the first power supply circuit 7031 or the powered controller 706.

When the second power supply circuit 7032 is not energized, the second thermistor RT2 in the second power supply circuit 7032 (not shown in FIG. 7; the second thermistor RT2 in FIG. 13 is connected in series with the live wire or the neutral wire of the power supply device). (Illustrated above) is connected in series between the power supply switching circuit 7033 and the second power supply circuit 7032. Since the power supply switching circuit 7033 receives the second signal, the first power supply circuit 7031 can start supplying power to the second power supply circuit 7032 through the power supply switching circuit 7033. In addition, this application records the moment when the second power supply circuit 7032 is energized as the first moment, that is, the first moment is when the first power circuit 7031 starts to supply power to the second power circuit 7032 and the second thermistor RT2 is connected in series during the power supply switch The time between the circuit 7033 and the second power supply circuit 7032.

After the second power supply circuit 7032 is energized, the large electrolysis in the second power supply circuit 7032 (such as components that implement the rectification and filtering function) needs to be charged from zero, and therefore, the second power supply circuit 7032 generates a surge current. In order to avoid the impact of the surge current on the back-end components in the second power circuit 7032, the controller 706 needs to short-circuit the second thermistor RT2 in the second power circuit 7032 after the second power circuit 7032 is energized for a preset period of time.

This application starts from the first moment, and records the moment after the preset period of time has passed as the second moment. And at the second moment, the controller 706 can switch the second thermistor RT2 from the series connection between the power supply switching circuit 7033 and the second power supply circuit 7032 to the short-circuit connection by controlling the second power supply circuit 7032 according to the second signal. Between the power supply switching circuit 7033 and the second power circuit 7032, the surge current generated in the second power circuit 7032 passes through the second thermistor RT2 to protect the back-end components of the second power circuit 7032.

In this way, the power supply pin of the second power supply circuit 7032 (represented by the number 33 in FIG. 7) is connected to the second power supply pin (represented by the number 22 in FIG. 7) of the backlight assembly 702 to start providing the backlight drive circuit 705 The power of the backlight light source located in the second area of the backlight assembly 702 makes the backlight driving circuit 705 ready to turn on the backlight light source.

Therefore, both the first power circuit 7031 and the second power circuit 7032 can provide the backlight driving circuit 705 with power of the backlight assembly 702, ensuring the backlight brightness of the backlight light source in the backlight assembly 702, and improving the picture quality of the display device 700.

It should be noted that the power supply pin of the second power supply circuit 7032 and the SW pin of the second power supply circuit 7032 may use one or more input or output ports.

In this application, when the second power supply circuit is not powered on, the second thermistor in the second power supply circuit is connected in series between the power supply switching circuit and the second power supply circuit. The power supply switching circuit can control the first power supply circuit to supply the voltage input by the power supply device to the second power supply circuit according to the received second signal output by the first power supply circuit or the powered controller, so that the second power supply circuit is powered on and records the current The moment is the first moment. After the second power circuit is energized, the large electrolysis in the second power circuit needs to be charged from zero, and therefore, the second power circuit will generate a surge current.

Starting from the first moment, the moment after the preset period of time has elapsed is recorded as the second moment. And at the second moment, the second power supply circuit can control the second thermistor to switch from being connected in series between the power supply switching circuit and the second power supply circuit to short-circuit connected between the power supply switching circuit and the second power supply circuit according to the second signal In between, the second thermistor is short-circuited to prevent the second thermistor from being overheated and damaged, to protect the second thermistor, and to make the surge current generated by the second power circuit pass through the second thermistor, Play the role of protecting the back-end components in the second power circuit.

In some embodiments, based on the connection between the first power supply circuit and the backlight drive circuit, and the connection between the second power supply circuit and the backlight drive circuit, the first power supply circuit can provide the backlight drive circuit with the backlight light source located in the first area of the backlight assembly The second power supply circuit can provide the backlight drive circuit with power for the backlight light source located in the second area of the backlight assembly, so that the backlight drive circuit can turn on the backlight in the backlight assembly under the power of the first power circuit and the second power circuit The light source ensures the backlight brightness of the backlight light source in the backlight assembly, guarantees the backlight effect of the display device, and improves the picture quality of the display device.

In a specific embodiment, taking the first signal as the high level of the STB signal and the second signal as the high level of the SW signal as an example, the first power circuit 7031 and the second power circuit 7032 supply power to the display device 700. The process can include:

Step 1. After the AC power supply AC provided by the power supply device is powered on, the first power supply circuit 7031 is powered on and starts to work, and the second power supply circuit 7032 is not powered on and cannot start to work.

Step 2. After the first power supply circuit 7031 starts to work, the display device 700 enters a standby mode. At this time, the STB pin of the controller 706 is at a low level, and the STB pin of the controller 706 is connected to the STB pin of the first power circuit 7031, so that the STB pin of the first power circuit 7031 is at the STB signal level. Low level.

Step 3. Since the current of the first power supply circuit 7031 at this time is small and will not cause the first thermistor RT1 to heat up, the controller 706 changes the STB pin of the controller 706 to a high level, and the controller 706 outputs the first signal to the STB pin of the first power supply circuit 7031, so that the STB pin of the first power supply circuit 7031 is at the high level of the STB signal.

Step 4. The first power supply circuit 7031 can control the first thermistor RT1 to be connected in series between the power supply device and the first power supply circuit 7031 according to the high level of the STB signal, so that the surge current generated by the first power supply circuit 7031 passes The first thermistor RT1 enables the first power circuit 7031 to provide the controller 706 and the backlight driving circuit 705 with power to the backlight light source located in the first area of the backlight assembly 702, so that the backlight driving circuit 705 is ready to turn on the backlight assembly 702 The backlight light source.

Step 5. When the backlight light source of the backlight assembly 702 is ready to be turned on, since the large electrolysis in the first power circuit 7031 has been fully charged before the first thermistor RT1 is short-circuited, there will be no generation in the first power circuit 7031. Inrush current. Furthermore, the controller 706 outputs the high level of the SW signal to the SW pin of the first power supply circuit 7031.

Step 6. According to the high level of the SW signal, the first power circuit 7031 controls the first thermistor RT1 to be short-circuited and connected between the power supply device and the first power circuit 7031, short-circuit the first thermistor RT1, and disconnect the first thermistor RT1. The connection of the thermistor RT1 prevents the first thermistor RT1 from overheating and is damaged, and plays a role in protecting the first thermistor RT1. In this way, the first thermistor RT1 not only protects the first power supply circuit 7031, but also does not damage itself due to overheating.

Step 71: While the controller 706 outputs the high level of the SW signal to the first power supply circuit 7031, the controller 706 also sends the high level of the SW signal to the power supply switching circuit 7033.

Step 72: When the first power circuit 7031 receives the high level of the SW signal output by the controller 706, the first power circuit 7031 sends the high level of the SW signal to the power supply switching circuit 7033.

Step 8. According to the high level of the SW signal, the power supply switching circuit 7033 controls the first power circuit 7031 to start supplying the voltage input by the power supply device to the second power circuit 7032, and at the same time, the second power circuit 7032 is energized at the moment Recorded as the first moment.

Because when the second power supply circuit 7032 is not powered on, the second thermistor RT2 is connected in series between the power supply switching circuit 7033 and the second power supply circuit 7032. Therefore, the first time is the time when the first power supply circuit 7031 starts to supply power to the second power supply circuit 7032 and the second thermistor RT2 is connected in series between the power supply switching circuit 7033 and the second power supply circuit 7032.

Step 9. Starting from the first moment, record the moment after the preset period of time as the second moment.

Step 10. After the second power supply circuit 7032 is energized, the large electrolysis in the second power supply circuit 7032 needs to be charged from zero, which causes the second power supply circuit 7032 to generate a surge current. Therefore, at the second moment, the second power supply circuit 7032 can control the second thermistor RT2 to switch from being connected in series between the power supply switching circuit 7033 and the second power supply circuit 7032 to being short-circuited according to the high level of the SW signal. Between the power supply switching circuit 7033 and the second power supply circuit 7032, the surge current generated by the second power supply circuit 7032 passes through the second thermistor RT2 to protect the back-end components of the second power supply circuit 7032. The second power supply circuit 7032 can provide the backlight driving circuit 705 with power of the backlight light source located in the second area in the backlight assembly 702.

Among them, the high level of the SW signal can be directly output to the second power circuit 7032 by the controller 706 or the first power circuit 7031 without delay, or can be directly output to the controller 706 or the first power circuit 7031 after a preset period of time. Output from the second power supply circuit 7032.

Step 11. The backlight driving circuit 705 can turn on the backlight light source of the backlight assembly 702 based on the electric energy provided by the first power circuit 7031 and the second power circuit 7032.

In this application, through the above-mentioned sequence control of the first power circuit and the second power circuit, not only the standby power consumption of the display device is saved, but also the problem of the thermistor overheating and damage due to the generation of inrush current is solved , Extend the life of the thermistor, make the thermistor play the role of protecting the first power circuit and the second power circuit, thereby realizing the process of providing dual power to the backlight assembly by the first power circuit and the second power circuit, The picture quality of the display device is ensured, and the backlight effect of the display device is guaranteed.

On the basis of the embodiment shown in FIG. 7, the present application may divide the first power supply circuit 7031 into multiple parts. In some embodiments, as shown in FIG. 8, the first power supply circuit 7031 may include: a first resistance switching circuit 70311 and a first voltage conversion circuit 70312.

The control terminal of the first resistance switching circuit 70311 is connected to the STB pin/SW pin of the controller 706, and the first resistance switching circuit 70311 is connected in parallel between the first terminal and the second terminal of the first thermistor RT1 , The first terminal of the first thermistor RT1 is also connected to the power supply device, the second terminal of the first thermistor RT1 is connected to the input terminal of the first voltage conversion circuit 70312, and the first output terminal of the first voltage conversion circuit 70312 It is connected to the power supply pin of the controller 706 (ie, number 11 in FIG. 7), and the second output terminal of the first voltage conversion circuit 70312 is connected to the backlight driving circuit 705.

Based on the above connection relationship, the first resistance switching circuit 70311 can receive the first signal from the controller 706. In addition, the first resistance switching circuit 70311 can control the first thermistor RT1 to be connected in series between the power supply device and the first voltage conversion circuit 70312 according to the first signal, so that the first thermistor RT1 is normally connected.

The first resistance switching circuit 70311 may also receive a second signal from the controller 706 after the power is supplied. Furthermore, the first resistance switching circuit 70311 can control the first thermistor RT1 to be short-circuited between the power supply device and the first voltage conversion circuit 70312 according to the second signal, so that the first thermistor RT1 is short-circuited.

In this application, the first voltage conversion circuit 70312 can convert the voltage input by the power supply device and supply power to the controller 706 and the backlight driving circuit 705 respectively, so that the controller 706 and the backlight driving circuit 705 are energized, and the backlight driving circuit 705 is also energized. The backlight light source located in the first area in the backlight assembly 702 is driven to implement subsequent operations.

Among them, the first resistance switching circuit 70311 and the first voltage conversion circuit 70312 may be an integrated chip, or may be a circuit composed of multiple components, which is not limited in this application.

In some embodiments, as shown in FIG. 9, the first resistance switching circuit 70311 may include: a third resistor R3, a third capacitor C3, a fourth resistor R4, a fifth resistor R5, a second transistor V2, a first resistor The capacitor C1, the third diode VD3 and the third relay K3.

Wherein, the first end of the third resistor R3 and the fourth end of the third relay K3 are both connected to the controller 706, and the second end of the third resistor R3 is connected to the first end of the third capacitor C3 and the fifth resistor R5, respectively. The first end is connected, the second end of the fifth resistor R5 is respectively connected to the first end of the fourth resistor R4 and the base of the second triode V2, and the collector of the second triode V2 is respectively connected to the first capacitor C1 The first terminal of the third diode VD3, the anode of the third diode VD3, and the first terminal of the third relay K3 are connected. The second terminal of the first capacitor C1 and the cathode of the third diode VD3 are both connected to the fourth terminal of the third relay K3. The second terminal of the third relay K3 is connected to the first terminal of the first thermistor RT1, the third terminal of the third relay K3 is connected to the second terminal of the first thermistor RT1, the third capacitor C3 The second end, the second end of the fourth resistor R4 and the emitter of the second triode V2 are all grounded.

Wherein, the implementation of the first resistance switching circuit 70311 is not limited to the above specific structure.

In some embodiments, based on the embodiment shown in FIG. 8, as shown in FIG. 10, the first voltage conversion circuit 70312 may include: a first electromagnetic interference (EMI) circuit 70312a, a first rectification filter circuit 70312b, the first PFC circuit 70312c, and the first LLC circuit 70312d.

The input terminal of the first electromagnetic interference circuit 70312a is respectively connected to the output terminal of the first resistance switching circuit 70311 and the second terminal of the first thermistor RT1, and the output terminal of the first electromagnetic interference circuit 70312a is connected to the first rectifier filter circuit. The input terminal of 70312b is connected, the output terminal of the first rectification filter circuit 70312b is connected with the input terminal of the first PFC circuit 70312c, the output terminal of the first PFC circuit 70312c is connected with the input terminal of the first LLC circuit 70312d, and the first LLC circuit 70312d The output terminals of are respectively connected to the controller 706 and the backlight driving circuit 705.

Generally, the large electrolysis is usually provided in the first rectification filter circuit 70312b. The specific structures of the first rectifying and filtering circuit 70312b, the first PFC circuit 70312c, and the first LLC circuit 70312d can be referred to the description of the embodiment in FIG. 4, which will not be repeated here.

Wherein, the implementation manner of the first voltage conversion circuit 70312 is not limited to the above specific structure.

In this application, the power supply switching circuit 7033 may be an integrated chip or a circuit composed of multiple components, which is not limited in this application.

In some embodiments, as shown in FIG. 11, the power supply switching circuit 7033 may include: a fourth capacitor C4, a first diode VD1, a first relay K1, and a fuse F.

Wherein, the first terminal of the fourth capacitor C4, the cathode of the first diode VD1, and the fourth terminal of the first relay K1 are all connected to the SW pin of the controller 706 or the first power circuit 7031, and the first relay K1 The third end is connected to the first end of the fuse F, the second end of the fuse F is connected to the second power supply circuit 7032, the second end of the first relay K1 is connected to the power supply device and the first power supply circuit 7031 respectively, and the first relay K1 The first terminal of, the anode of the first diode VD1 and the second terminal of the fourth capacitor C4 are all grounded.

In this application, the fuse F is the fuse on the mid-fire (L) line of the power supply equipment. When the display device 700 enters the standby mode, the second signal is at a third level, which is used to indicate that the second terminal and the third terminal of the first relay K are disconnected, such as the low level of the SW signal, so that The L line is cut off, and the second power supply circuit 7032 will not be powered. When the standby power of the display device is consumed, the controller 706 or the first power supply circuit 7031 sends a second signal to the power supply switching circuit 7033. The second signal is at a fourth level, and the fourth level is used to indicate the first The second terminal and the third terminal of the relay K are connected, so that the L line is turned on, and the second power supply circuit 7032 is supplied with power.

Wherein, the implementation of the power supply switching circuit 7033 is not limited to the above specific structure.

In this application, the second power supply circuit 7032 can short-circuit the second thermistor RT2 in various ways to prevent the surge current generated by the second power supply circuit 7032 from affecting the back-end components of the second power supply circuit 7032.

Hereinafter, on the basis of the above-mentioned embodiments shown in Figs. 7-11 and in conjunction with Figs. 12-20, the specific implementation process of the second power circuit 7032 short-circuiting the second thermistor RT2 will be described in detail.

In some embodiments: as shown in FIG. 12, in this embodiment, the power supply switching circuit 7033 is provided in the second power supply circuit 7032. Since the first power supply circuit 7031 or the powered controller 706 will both output the second signal to the power supply switching circuit 7033 and the second power supply circuit 7032, and the power supply switching circuit 7033 is provided in the second power supply circuit 7032, the power supply switching circuit 7033 and the second power supply circuit 7032 can use one pin and simultaneously receive the second signal, that is, the control end of the power supply switching circuit 7033 is connected to the SW pin of the second power supply circuit 7032, thereby reducing the number of input or output ports. Reduce the complexity of signal transmission.

In this application, when the power supply switching circuit 7033 and the second power supply circuit 7032 simultaneously receive the second signal, the first power supply circuit 7031 starts to supply power to the second power supply circuit 7032 through the power supply switching circuit 7033, so that the second power circuit 7032 is energized.

After the second power supply circuit 7032 is powered on, the second power supply circuit 7032 can control the second thermistor RT2 to be connected in series between the power supply switching circuit 7033 and the second power supply circuit 7032 according to the second signal, and delay the preset time. After a preset period of time, the second power supply circuit 7032 then controls the second thermistor RT2 to switch from being connected in series between the power supply switching circuit 7033 and the second power circuit 7032 to being short-circuited between the power supply switching circuit 7033 and the second power circuit 7032. In between, the second thermistor RT2 is short-circuited.

Based on the foregoing description, the present application can divide the second power supply circuit 7032 into multiple parts. In some embodiments, as shown in FIG. 13, the second power supply circuit 7032 may include: a second resistance switching circuit 70321a and a second voltage conversion circuit 70322a.

The control end of the second resistance switching circuit 70321a is connected to the SW pin of the first power supply circuit 7031 or the controller 706d, and the second resistance switching circuit 70321a is connected in parallel to the first and second ends of the second thermistor RT2 In between, the first terminal of the second thermistor RT2 is also connected to the output terminal of the power supply switching circuit 7033, the second terminal of the second thermistor RT2 is also connected to the input terminal of the second voltage conversion circuit 70322a, and the second voltage The output terminal of the conversion circuit 70322a is connected to the backlight driving circuit 705.

Based on the foregoing connection relationship, the second resistance switching circuit 70321a can receive the second signal from the first power supply circuit 7031 or the powered controller 706. At the same time, the first power supply circuit 7031 starts to supply power to the second power supply circuit 7032 through the power supply switching circuit 7033. Therefore, the second resistance switching circuit 70321a can control the second thermistor RT2 to be connected in series between the power supply switching circuit 7033 and the second voltage conversion circuit 70322a according to the second signal, and delay the preset duration.

After a preset period of time, the second resistance switching circuit 70321a can control the second thermistor RT2 to switch from being connected in series between the power supply switching circuit 7033 and the second voltage conversion circuit 70322a to being short-circuited between the power supply switching circuit 7033 and the second voltage. Between the conversion circuits 70322a, the second thermistor RT2 is short-circuited.

In the present application, the second voltage conversion circuit 70322a can convert the voltage output from the first power supply circuit 7031 and supply power to the backlight driving circuit 705, so that the backlight driving circuit 705 drives the backlight light source located in the second area of the backlight assembly 702 to achieve The display device 700 displays a clear picture.

Wherein, the second resistance switching circuit 70321a and the second voltage conversion circuit 70322a may be integrated chips or circuits composed of multiple components, which is not limited in this application.

In some embodiments, as shown in FIG. 14, the second resistance switching circuit 70321a may include: a first resistor R1, a second capacitor C2, a voltage regulator tube VZ1, a second resistor R2, a first transistor V1, a second resistor The diode VD2 and the second relay K2.

The first end of the first resistor R1 and the fourth end of the second relay K2 are both connected to the SW pin of the controller 706 or the first power circuit 7031, and the second end of the first resistor R1 is respectively connected to the second capacitor C2. The first terminal of the zener tube VZ1 is connected to the negative electrode of the zener tube VZ1, the positive electrode of the zener tube VZ1 is connected to the first terminal of the second resistor R2 and the base of the first transistor V1, and the collector of the first transistor V1 Are respectively connected to the anode of the second diode VD2 and the first end of the second relay K2, the cathode of the second diode VD2 is connected to the fourth end of the second relay K2, and the second end of the second relay K2 is connected to the first end of the second relay K2. The first end of the two thermistors RT2 is connected, the third end of the second relay K2 is connected to the second end of the second thermistor RT2, the second end of the second capacitor C2, the second end of the second resistor R2 and The emitters of the first transistor V1 are all grounded.

In this application, the first transistor V1 is an N-type transistor. When the controller 706 or the first power supply circuit 7031 outputs the second signal to the second resistance switching circuit 70321a, under the influence of the first resistor R1 and the second capacitor C2, the voltage across the second capacitor C2 gradually increases until the voltage is stabilized. When the voltage regulator value of VZ1 is controlled, the voltage regulator tube VZ1 is turned on, the first transistor V1 is turned on, and the second relay K2 short-circuits the second thermistor RT2.

Among them, the resistance value of the first resistor R1, the second capacitor C2 and the capacitance value, and the voltage stabilization value of the voltage regulator tube VZ1 can determine the time point when the second relay K2 is turned off and on, that is, the preset time is determined to ensure After the second power circuit 7032 is powered on, the surge current on the L line passes through the second thermistor RT2 after a preset period of time, so as to protect the back-end circuit.

Wherein, the implementation of the second resistance switching circuit 70321a is not limited to the above specific structure.

In some embodiments, as shown in FIG. 15, the second voltage conversion circuit 70322a may include: a second electromagnetic interference circuit 70322aa, a second rectification filter circuit 70322ab, a second PFC circuit 70322ac, and a second LLC circuit 70322ad.

Among them, the input end of the second electromagnetic interference circuit 70322aa is connected to the output end of the second resistance switching circuit 70321a and the second end of the second thermistor RT2 respectively, and the output end of the second electromagnetic interference circuit 70322aa is connected to the second rectifier filter circuit. The input terminal of 70322ab is connected, the output terminal of the second rectification filter circuit 70322ab is connected with the input terminal of the second PFC circuit 70322ac, the output terminal of the second PFC circuit 70322ac is connected with the input terminal of the second LLC circuit 70322ad, and the second LLC circuit 70322ad The output terminal of is connected to the backlight driving circuit 705.

Generally, the large electrolysis is usually provided in the second rectifying and filtering circuit 70322ab. For the specific structures of the second rectifying and filtering circuit 70322ab, the second PFC circuit 70322ac, and the second LLC circuit 70322ad, please refer to the description of the embodiment in FIG. 4, which will not be repeated here.

Wherein, the implementation manner of the second voltage conversion circuit 70322a is not limited to the above specific structure.

In some embodiments: as shown in FIG. 16, the same as the above embodiments, in this embodiment, the power supply switching circuit 7033 is provided in the second power supply circuit 7032. The difference from the foregoing embodiment is that in this embodiment, the first power supply circuit 7031 or the powered controller 706 does not simultaneously output the second signal to the power supply switching circuit 7033 and the second power supply circuit 7032, but the first power circuit 7032. 7031 or the powered controller 706 first outputs the second signal to the power supply switching circuit 7033. After the preset period of time has elapsed, the first power supply circuit 7031 or the powered controller 706 then outputs a second signal to the second power supply circuit 7032. That is, the time when the power supply switching circuit 7033 receives the second signal is earlier than the time when the second power circuit 7032 receives the second signal, and the interval is preset.

The control terminal of the power supply switching circuit 7033 may be directly connected to the SW pin of the first power supply circuit 7031, and the control terminal of the power supply switching circuit 7033 may be directly connected to the SW pin of the controller 706, which is not limited in this application. When the controller 706 outputs the second signal to the second power supply circuit 7032, the controller 706 has two SW pins (shown as SW1 and SW2 in FIG. 16), and one of the SW pins (shown as SW1 in FIG. 16) Out) is connected to the SW pin (shown as SW1 and SW2 in FIG. 16) of the first power supply circuit 7031, and the other SW pin (shown as SW2 in FIG. 16) is connected to the SW pin of the second power supply circuit 7032 In this way, the controller 706 outputs the second signal to the first power supply circuit 7031 and the second power supply circuit 7032 in a time-sharing manner. When the first power supply circuit 7031 outputs the second signal to the second power supply circuit 7032, the first power supply circuit 7031 has two SW pins, one of which is SW pin (shown as SW1 in FIG. 16) and the controller 706 The SW pin is connected, and the other SW pin (shown as SW2 in FIG. 16) is connected to the SW pin of the second power supply circuit 7032, so that the first power supply circuit 7031 receives the second switch from the SW pin of the controller 706 After a preset period of time, the second signal can be output to the SW pin of the second power supply circuit 7032.

In the present application, when the power supply switching circuit 7033 receives the second signal, the first power supply circuit 7031 supplies power to the second power supply circuit 7032 through the power supply switching circuit 7033, so that the second power supply circuit 7032 is energized.

After the second power supply circuit 7032 is powered on, the second power supply circuit 7032 can control the second thermistor RT2 to be connected in series between the power supply switching circuit 7033 and the second power supply circuit 7032. After a preset period of time, the second power supply circuit 7032 receives the second signal. At this time, the second power supply circuit 7032 can control the second thermistor RT2 from the series connection between the power supply switching circuit 7033 and the second power supply according to the second signal. The circuits 7032 are switched to be short-circuited and connected between the power supply switching circuit 7033 and the second power supply circuit 7032, so that the second thermistor RT2 is short-circuited.

Based on the foregoing description, the present application can divide the second power supply circuit 7032 into multiple parts. In some embodiments, as shown in FIG. 17, the second power supply circuit 7032 may include: a third resistance switching circuit 70321b and a third voltage conversion circuit 70322b.

The control terminal of the third resistance switching circuit 70321b is connected to the first power supply circuit 7031 or the SW pin of the controller 706), and the third resistance switching circuit 70321b is connected in parallel to the first terminal and the second terminal of the second thermistor RT2. The first terminal of the second thermistor RT2 is also connected to the output terminal of the power supply switching circuit 7033, the second terminal of the second thermistor RT2 is also connected to the input terminal of the third voltage conversion circuit 70322b, and the third The output terminal of the voltage conversion circuit 70322b is connected to the backlight driving circuit 705.

Based on the foregoing connection relationship, when the power supply switching circuit 7033 receives the second signal, the first power supply circuit 7031 starts to supply power to the second power supply circuit 7032 through the power supply switching circuit 7033. Therefore, the third resistance switching circuit 70321b can control the second thermistor RT2 to be connected in series between the power supply switching circuit 7033 and the third voltage conversion circuit 70322b.

After a preset period of time, the third resistance switching circuit 70321b may receive the second signal from the first power supply circuit 7031 or the powered controller 706. Therefore, the third resistance switching circuit 70321b can control the second thermistor RT2 to switch from the series connection between the power supply switching circuit 7033 and the third voltage conversion circuit 70322b to the short circuit connection between the power supply switching circuit 7033 and the third voltage conversion circuit 70322b according to the second signal. Between the voltage conversion circuits 70322b, the second thermistor RT2 is short-circuited.

Therefore, the third voltage conversion circuit 70322b can convert the voltage output from the first power supply circuit 7031 and supply it to the backlight driving circuit 705, so that the backlight driving circuit 705 drives the backlight light source located in the second area of the backlight assembly 702 to achieve display The device 700 clearly displays the picture.

Wherein, the third resistance switching circuit 70321b and the third voltage conversion circuit 70322b may be integrated chips or circuits composed of multiple components, which is not limited in this application.

In some embodiments, as shown in FIG. 18, the third resistance switching circuit 70321b may include: a sixth resistor R2', a third triode V1', a fourth diode VD2', and a fourth relay K2'.

The first end of the sixth resistor R2', the base of the third transistor V1', and the fourth end of the fourth relay K2' are all connected to the controller 706 or the first power circuit 7031, and the third transistor The collector of V1' is respectively connected to the anode of the fourth diode VD2' and the first end of the fourth relay K2', and the cathode of the fourth diode VD2' is connected to the fourth end of the fourth relay K2'. The second terminal of the four relay K2' is connected to the first terminal of the second thermistor RT2, the third terminal of the fourth relay K2' is connected to the second terminal of the second thermistor RT2, and the second terminal of the second capacitor C2' The second end, the second end of the sixth resistor R2 and the emitter of the third transistor V1' are all grounded.

Wherein, the implementation of the third resistance switching circuit 70321b is not limited to the above specific structure.

For the specific structure of the third voltage conversion circuit 70322b, reference may be made to the description of the structure of the second voltage conversion circuit 70322a in the embodiment shown in FIG. 15 in the foregoing embodiments, and details are not described herein.

In some embodiments:

As shown in FIG. 19, the difference from the foregoing embodiment is that in this embodiment, the power supply switching circuit 7033 is provided in the first power supply circuit 7031. In this way, the power supply switching circuit 7033 and the second power supply circuit 7032 receive the second signal from the first power supply circuit 7031 or the powered controller 706 through different pins. The control terminal of the power supply switching circuit 7033 can be directly connected to the SW pin of the first power supply circuit 7031, and the control terminal of the power supply switching circuit 7033 can be directly connected to the SW pin of the controller 706, which is not limited in this application. Similar to the foregoing embodiment, in this embodiment, the power supply switching circuit 7033 and the second power supply circuit 7032 simultaneously receive the second signal, thereby reducing the complexity of signal transmission.

In this application, when the power supply switching circuit 7033 and the second power supply circuit 7032 simultaneously receive the second signal, the first power supply circuit 7031 starts to supply power to the second power supply circuit 7032 through the power supply switching circuit 7033, so that the second power supply circuit 7032 is energized.

After the second power supply circuit 7032 is powered on, the second power supply circuit 7032 can control the second thermistor RT2 to be connected in series between the power supply switching circuit 7033 and the second power supply circuit 7032 according to the second signal, and delay the preset time. After a preset period of time, the second power supply circuit 7032 controls the second thermistor RT2 to switch from being connected in series between the power supply switching circuit 7033 and the second power circuit 7032 to being short-circuited between the power supply switching circuit 7033 and the second power circuit 7032. In between, the second thermistor RT2 is short-circuited.

For the specific structure of the second power supply circuit 7032, please refer to the description of the structure of the second power supply circuit 7032 in the foregoing embodiment, which will not be repeated here.

In some embodiments:

As shown in FIG. 20, the same as the previous embodiment, in this embodiment, the power supply switching circuit 7033 is provided in the first power supply circuit 7031. The difference from the foregoing embodiment is that in this embodiment, the first power supply circuit 7031 or the powered controller 706 does not simultaneously output the second signal to the power supply switching circuit 7033 and the second power supply circuit 7032, but the first power circuit 7032. 7031 or the powered controller 706 first outputs the second signal to the power supply switching circuit 7033. After the preset period of time has elapsed, the first power supply circuit 7031 or the powered controller 706 then outputs a second signal to the second power supply circuit 7032. That is, the time when the power supply switching circuit 7033 receives the second signal is earlier than the time when the second power circuit 7032 receives the second signal, and the interval is preset.

The control terminal of the power supply switching circuit 7033 can be directly connected to the SW pin of the first power supply circuit 7031, and the control terminal of the power supply switching circuit 7033 can be directly connected to the SW pin of the controller 706, which is not limited in this application. When the controller 706 outputs the second signal to the second power supply circuit 7032, there are two SW pins of the controller 706 (shown as SW1 and SW2 in FIG. 20), and one SW pin (shown as SW1 in FIG. 20) OUT) is connected to the SW pin of the first power circuit 7031, and the other SW pin (shown as SW2 in FIG. 20) is connected to the SW pin of the second power circuit 7032, so as to realize the time-sharing of the controller 706 to the first The power supply circuit 7031 and the second power supply circuit 7032 output the second signal. When the first power supply circuit 7031 outputs the second signal to the second power supply circuit 7032, the first power supply circuit 7031 has two SW pins (shown as SW1 and SW2 in FIG. 20), and one of the SW pins (shown as SW1 and SW2 in FIG. 20) (Shown in SW1) is connected to the SW pin of the controller 706, and the other SW pin (shown as SW2 in FIG. 20) is connected to the SW pin of the second power supply circuit 7032, so that the first power supply circuit 7031 is from The SW pin of the controller 706 receives the second signal, and after a preset time period, can output the second signal to the SW pin of the second power supply circuit 7032.

It should be noted that, in addition to the above embodiments, the power supply switching circuit 7033 can be provided in the first power circuit 7031 and the second power circuit 7032, and the specific implementation process of the second power circuit 7032 short-circuiting the second thermistor RT2 can be Refer to the content shown in the above four embodiments, which will not be repeated here.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the application, not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or equivalently replace some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present application. range.

Claims

A display device, characterized in that,

The display screen is configured to present image content;

A backlight assembly configured to provide a backlight light source for the display screen;

The first power supply circuit is configured to provide power to part of the backlight light source in the backlight assembly;

The second power supply circuit is configured to provide power to part of the backlight light source in the backlight assembly;

The TCON circuit is configured to drive the display screen to present image content;

A backlight driving circuit configured to control the brightness and/or turning on and off of the backlight light source in the backlight assembly;

The controller is configured to control the first power supply circuit to supply power to the second power supply circuit when receiving the power-on instruction.
The display device according to claim 1, further comprising: a power supply switching circuit; the power supply switching circuit is connected between the input terminal of the first power supply circuit and the input terminal of the second power supply circuit, The input end of the first power supply circuit is connected to a power supply device;

The controller is configured to control the first power supply circuit to supply power to the controller and to provide the backlight drive circuit with power for the backlight light source located in the first area of the backlight assembly;

The controller is further configured to control the first power supply circuit to supply power to the second power supply circuit by turning on the power supply switching circuit, and control the powered second power supply circuit to drive the backlight The circuit provides power to the backlight light source located in the second area of the backlight assembly, and the first area and the second area constitute a display area of the display screen.
The display device according to claim 2, wherein:

The controller is further configured to switch the second thermistor in the second power supply circuit from being connected in series between the power supply switching circuit and the second power supply circuit to after a preset time period has elapsed. A short circuit is connected between the power supply switching circuit and the second power supply circuit, and the second power supply circuit is controlled to provide the backlight driving circuit with power of the backlight light source located in the second area of the backlight assembly.
The display device according to claim 3, wherein:

The controller is further configured to control the first power supply circuit to connect the second thermistor in the second power supply circuit in series between the power supply switching circuit and the second power supply circuit. The voltage input by the power supply device supplies power to the second power supply circuit.
The display device according to claim 2, wherein:

The controller is configured to control the first power supply circuit to control the first power supply circuit by connecting the first thermistor in the first power supply circuit in series between the power supply device and the first power supply circuit The voltage input by the power supply device supplies power to the controller and provides the backlight driving circuit with power of the backlight light source located in the first area of the backlight assembly.
The display device according to claim 5, wherein:

The controller is further configured to control the first thermistor in the first power supply circuit to switch from being connected in series between the power supply device and the first power supply circuit to being short-circuited between the power supply device and the first power supply circuit. Between the first power circuit.
7. The display device according to any one of claims 1 to 6, wherein the first power supply circuit comprises: a first resistance switching circuit and a first voltage conversion circuit;

Wherein, the control end of the first resistance switching circuit is connected to the controller, the first resistance switching circuit is connected in parallel between the first end and the second end of the first thermistor, and the first resistance switching circuit is connected in parallel between the first end and the second end of the first thermistor. The first end of a thermistor is also connected to the power supply device, the second end of the first thermistor is connected to the input end of the first voltage conversion circuit, and the first output end of the first voltage conversion circuit is Connected to the controller, and the second output terminal of the first voltage conversion circuit is connected to the backlight driving circuit;

The controller is configured to send a first signal to the first resistance switching circuit;

The first resistance switching circuit is configured to control the first thermistor to be connected in series between the power supply device and the first voltage conversion circuit based on the first signal;

The controller is further configured to send a second signal to the first resistance switching circuit;

The first resistance switching circuit is further configured to control the first thermistor to be short-circuited and connected between the power supply device and the first voltage conversion circuit based on the second signal;

The first voltage conversion circuit is configured to convert the voltage input by the power supply device and supply power to the controller, and to provide the backlight driving circuit with the power of the backlight light source located in the first area of the backlight assembly .
The display device according to claim 7, wherein:

The first resistance switching circuit includes: a third resistor, a third capacitor, a fourth resistor, a fifth resistor, a second triode, a first capacitor, a third diode, and a third relay;

Wherein, the first end of the third resistor and the fourth end of the third relay are both connected to the controller, and the second end of the third resistor is respectively connected to the first end and the first end of the third capacitor. The first end of the fifth resistor is connected, the second end of the fifth resistor is respectively connected to the first end of the fourth resistor and the base of the second triode, and the second triode is The collector of the tube is respectively connected to the first end of the first capacitor, the anode of the third diode, and the first end of the third relay. The second end of the first capacitor is connected to the first end of the third relay. The cathodes of the three diodes are all connected to the fourth end of the third relay, the second end of the third relay is connected to the first end of the first thermistor, and the third end of the third relay is connected to the first end of the first thermistor. The terminal is connected to the second terminal of the first thermistor, and the second terminal of the third capacitor, the second terminal of the fourth resistor, and the emitter of the second triode are all grounded;

The first voltage conversion circuit includes: a first electromagnetic interference circuit, a first rectification filter circuit, a first PFC circuit, and a first LLC circuit;

Wherein, the input end of the first electromagnetic interference circuit is connected to the output end of the first resistance switching circuit and the second end of the first thermistor respectively, and the output end of the first electromagnetic interference circuit is connected to the second end of the first thermistor. The input end of the first rectification and filter circuit is connected, the output end of the first rectification and filter circuit is connected to the input end of the first PFC circuit, and the output end of the first PFC circuit is connected to the first LLC circuit. The input terminal is connected, and the output terminal of the first LLC circuit is respectively connected to the controller and the backlight driving circuit.
The display device according to claim 7, wherein:

The second power supply circuit is configured to receive the first power supply circuit or the second signal output by the controller after power supply, and the first power supply circuit supplies the power supply circuit to the power supply circuit through the power supply switching circuit. When the second power supply circuit starts to supply power, based on the second signal, control the second thermistor to be connected in series between the power supply switching circuit and the second power supply circuit, and delay the preset duration; After the preset time period has elapsed, controlling the second thermistor to be short-circuited and connected between the power supply switching circuit and the second power supply circuit;

or,

The second power supply circuit is configured to control the second thermistor to be connected in series to the power supply switching circuit when the first power supply circuit starts to supply power to the second power supply circuit through the power supply switching circuit Between the second power supply circuit and the second power supply circuit; the second signal is received from the first power supply circuit or the controller after supplying power after the preset time period, and based on the second signal, controls the The second thermistor is short-circuited and connected between the power supply switching circuit and the second power supply circuit.
9. The display device of claim 9, wherein the second power supply circuit comprises: a second resistance switching circuit and a second voltage conversion circuit;

Wherein, the control end of the second resistance switching circuit is connected to the first power supply circuit or the controller, and the second resistance switching circuit is connected in parallel to the first end and the second end of the second thermistor. The first terminal of the second thermistor is also connected to the output terminal of the power supply switching circuit, and the second terminal of the second thermistor is also connected to the input terminal of the second voltage conversion circuit. Connected, the output terminal of the second voltage conversion circuit is connected to the backlight driving circuit;

The second resistance switching circuit is configured to receive the second signal output by the controller after receiving the first power supply circuit or the power supply, and the first power supply circuit sends the signal to the power supply circuit through the power supply switching circuit. When the second power supply circuit starts to supply power, based on the second signal, the second thermistor is controlled to be connected in series between the power supply switching circuit and the second voltage conversion circuit, and the preset duration is delayed ；

The second resistance switching circuit is further configured to control the second thermistor to be short-circuited and connected between the power supply switching circuit and the second voltage conversion circuit after the preset time period has elapsed;

The second voltage conversion circuit is used for converting the voltage output from the first power supply circuit and providing the backlight driving circuit with power of the backlight light source located in the second area of the backlight assembly.
The display device according to claim 10, wherein:

The second resistance switching circuit includes: a first resistor, a second capacitor, a voltage regulator tube, a second resistor, a first triode, a second diode, and a second relay;

Wherein, the first end of the first resistor and the fourth end of the second relay are both connected to the controller or the first power circuit, and the second end of the first resistor is respectively connected to the second capacitor The first end of the voltage regulator tube is connected to the negative electrode of the voltage regulator tube, and the anode electrode of the voltage regulator tube is respectively connected to the first end of the second resistor and the base electrode of the first triode. The collector of the pole tube is respectively connected to the anode of the second diode and the first end of the second relay, and the cathode of the second diode is connected to the fourth end of the second relay, so The second end of the second relay is connected to the first end of the second thermistor, the third end of the second relay is connected to the second end of the second thermistor, and the second capacitor The second end of the second resistor, the second end of the second resistor, and the emitter of the first triode are all grounded;

The second voltage conversion circuit includes: a second electromagnetic interference circuit, a second rectification filter circuit, a second PFC circuit, and a second LLC circuit;

Wherein, the input end of the second electromagnetic interference circuit is connected to the output end of the second resistance switching circuit and the second end of the second thermistor respectively, and the output end of the second electromagnetic interference circuit is connected to the second end of the second thermistor. The input end of the second rectification filter circuit is connected, the output end of the second rectification filter circuit is connected to the input end of the second PFC circuit, and the output end of the second PFC circuit is connected to the second LLC circuit. The input terminal is connected, and the output terminal of the second LLC circuit is connected to the backlight driving circuit.
9. The display device according to claim 9, wherein the second power supply circuit comprises: a third resistance switching circuit and a third voltage conversion circuit;

Wherein, the control end of the third resistance switching circuit is connected to the first power supply circuit and/or the controller, and the third resistance switching circuit is connected in parallel to the first end of the second thermistor and Between the second terminals, the first terminal of the second thermistor is also connected to the output terminal of the power supply switching circuit, and the second terminal of the second thermistor is also connected to the output terminal of the third voltage conversion circuit. The input terminal is connected, and the output terminal of the third voltage conversion circuit is connected to the backlight driving circuit;

The third resistance switching circuit is used to control the second thermistor to be connected in series to the power supply switching circuit when the first power supply circuit starts to supply power to the second power supply circuit through the power supply switching circuit And the third resistance switching circuit;

The third resistance switching circuit is further configured to receive the second signal from the first power supply circuit or the controller after power supply after the preset time period; and based on the second signal, control all The second thermistor is short-circuited and connected between the power supply switching circuit and the third resistance switching circuit;

The third voltage conversion circuit is configured to convert the voltage output from the first power supply circuit and provide the backlight driving circuit with power of the backlight light source located in the second area of the backlight assembly.
The display device according to claim 12, wherein:

The third resistance switching circuit includes: a sixth resistor, a third triode, a fourth diode, and a fourth relay;

Wherein, the first end of the sixth resistor, the base of the third triode, and the fourth end of the fourth relay are all connected to the controller or the first power circuit, and the third third The collector of the pole tube is respectively connected to the anode of the fourth diode and the first end of the fourth relay, and the cathode of the fourth diode is connected to the fourth end of the fourth relay, so The second end of the fourth relay is connected to the first end of the second thermistor, the third end of the fourth relay is connected to the second end of the second thermistor, and the second capacitor The second end of the sixth resistor, the second end of the sixth resistor, and the emitter of the third triode are all grounded;

The third voltage conversion circuit includes: a third electromagnetic interference circuit, a third rectification filter circuit, a third PFC circuit, and a third LLC circuit;

Wherein, the input end of the third electromagnetic interference circuit is respectively connected to the output end of the third resistance switching circuit and the second end of the second thermistor, and the output end of the third electromagnetic interference circuit is connected to the second end of the second thermistor. The input end of the third rectification and filter circuit is connected, the output end of the third rectification and filter circuit is connected to the input end of the third PFC circuit, and the output end of the third PFC circuit is connected to the third LLC circuit. The input terminal is connected, and the output terminal of the third LLC circuit is connected to the backlight driving circuit.
The display device according to any one of claims 1-13, wherein the power supply switching circuit is provided in the first power circuit, and/or the power supply switching circuit is provided in the second power circuit in.
14. The display device of claim 14, wherein the power supply switching circuit comprises: a fourth capacitor, a first diode, a first relay, and a fuse;

Wherein, the first terminal of the fourth capacitor, the cathode of the first diode, and the fourth terminal of the first relay are all connected to the controller or the first power circuit, and the first The third terminal of the relay is connected to the first terminal of the fuse, the second terminal of the fuse is connected to the second power circuit, and the second terminal of the first relay is connected to the power supply device and the first terminal, respectively. A power circuit is connected, and the first terminal of the first relay, the anode of the first diode and the second terminal of the fourth capacitor are all grounded.