CN112785985B

CN112785985B - Display device

Info

Publication number: CN112785985B
Application number: CN202010018527.2A
Authority: CN
Inventors: 王远洋; 庞震华
Original assignee: Hisense Visual Technology Co Ltd
Current assignee: Hisense Visual Technology Co Ltd
Priority date: 2019-11-04
Filing date: 2020-01-08
Publication date: 2022-03-11
Anticipated expiration: 2040-01-08
Also published as: CN111526398A; CN111526398B; WO2021088253A1; CN112785985A

Abstract

The application provides a display device. The display device includes: a display screen configured to present image content; a backlight assembly configured to provide a backlight light source to the display screen; a first power supply circuit configured to supply power to a backlight light source in the backlight assembly; a second power supply circuit configured to supply power to a backlight light source in the backlight assembly; a TCON circuit configured to drive the display screen to present image content; a backlight driving circuit configured to control a brightness of a 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 a starting-up instruction. Thus, by controlling the start-up sequence of the first power supply circuit and the second power supply circuit, the standby power consumption of the display device is saved.

Description

Display device

The present application claims priority from chinese patent application filed on 04/11/2019 under the name "display device" and having application number 201911067364.0, the entire contents of which are incorporated herein by reference.

Technical Field

The application relates to the technical field of power supplies, in particular to a display device.

Background

With the continuous development of science and technology and economy, the living standard of people is higher and higher. For example, it is desirable that display devices such as televisions have better image quality and achieve brightness indicators. If a single power supply architecture is adopted to supply power to the display device, it is difficult to select a proper power supply with low cost. If the dual-power architecture is adopted to realize the power supply of the display equipment, the actual requirements of people can be met.

In order to balance the power supply of the dual power sources, the display device generally collects the power supply of the backlight in the divided areas. However, the dual power supply mode often causes higher standby power consumption of the display device, and is easy to cause resource waste.

Disclosure of Invention

The application provides a display device to standby power is too high when solving dual supply parallel power supply among the prior art to and because surge current's production and lead to thermistor overheated and take place the problem of damage.

The application provides a display device, including:

a display screen configured to present image content;

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

a first power supply circuit configured to supply power to a part of backlight light sources in the backlight assembly;

a second power supply circuit configured to supply power to a part of backlight light sources in the backlight assembly;

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

a backlight driving circuit configured to control brightness and/or turn on and off of a 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 a starting-up instruction.

In some embodiments, further comprising: a power supply switching circuit; the power supply switching circuit is connected between the input end of the first power supply circuit and the input end of the second power supply circuit, and the input end of the first power supply circuit is connected with power supply equipment;

the controller is configured to control the first power supply circuit to supply power to the controller and supply power of a backlight light source located in a first area in the backlight assembly to a backlight driving circuit;

the controller is further configured to control the first power circuit to supply power to the second power circuit by turning on the power supply switching circuit, and control the second power circuit after power supply to supply power to the backlight driving circuit for the backlight light source located in a second area in the backlight assembly, where the first area and the second area constitute a display area of the display screen.

In some embodiments, the controller is further configured to control the second power circuit to supply the backlight driving circuit with the electric power of the backlight light source located in the second area in the backlight assembly by switching a second thermistor in the second power circuit from being connected in series between the power supply switching circuit and the second power circuit to being connected in short circuit between the power supply switching circuit and the second power circuit after a preset time period.

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

In some embodiments, the controller is configured to control the first power supply circuit to supply the voltage input by the power supply device to the controller and to supply the power of the backlight light source located in the first region of the backlight assembly to the backlight driving 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.

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 being connected in short circuit between the power supply device and the first power supply circuit.

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

the control end of the first resistance switching circuit is connected with the controller, the first resistance switching circuit is connected in parallel between the first end and the second end of a first thermistor in the first power supply circuit, the first end of the first thermistor is also connected with power supply equipment, the second end of the first thermistor is connected with the input end of the first voltage conversion circuit, the first output end of the first voltage conversion circuit is connected with the controller, and the second output end of the first voltage conversion circuit is connected with the backlight driving circuit;

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

the first resistance switching circuit 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 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 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 a voltage input by the power supply device and supply power to the controller and supply power of a backlight light source located in a first region in the backlight assembly to the backlight driving circuit.

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

the first end of the third resistor and the fourth end of the third relay are both connected with the controller, the second end of the third resistor is respectively connected with the first end of the third capacitor and the first end of the fifth resistor, the second end of the fifth resistor is respectively connected with the first end of the fourth resistor and the base of the second triode, the collector of the second triode is respectively connected with 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 and the cathode of the third diode are both connected with the fourth end of the third relay, the second end of the third relay is connected with the first end of the first thermistor, the third end of the third relay is connected with the second end of the first thermistor, the second end of the third capacitor, The second end of the fourth resistor and the emitter of the second triode are both grounded;

the first voltage conversion circuit includes: the device comprises a first electromagnetic interference circuit, a first rectifying and filtering circuit, a first PFC circuit and a first LLC circuit;

the input end of the first electromagnetic interference circuit is connected with the output end of the first resistor switching circuit and the second end of the first thermistor respectively, the output end of the first electromagnetic interference circuit is connected with the input end of the first rectifying and filtering circuit, the output end of the first rectifying and filtering circuit is connected with the input end of the first PFC circuit, the output end of the first PFC circuit is connected with the input end of the first LLC circuit, and the output end of the first LLC circuit is connected with the controller and the backlight driving circuit respectively.

In some embodiments, the second power circuit is configured to, when the second signal output by the controller after the first power circuit or the power supply is received and the first power circuit starts to supply power to the second power circuit through the power supply switching circuit, control a second thermistor in the second power circuit to be connected in series between the power supply switching circuit and the second power circuit based on the second signal and delay for a preset time; after the preset duration, controlling the second thermistor to be in short-circuit connection between the power supply switching circuit and the second power supply circuit;

alternatively, the first and second electrodes may be,

the second power supply circuit configured to control a second thermistor in the second power supply circuit to be connected in series between the power supply switching circuit and the second power supply circuit when the first power supply circuit starts supplying power to the second power supply circuit through the power supply switching circuit; and receiving the second signal after a preset time period from the first power supply circuit or the controller after power supply, and controlling the second thermistor to be in short-circuit connection between the power supply switching circuit and the second power supply circuit based on the second signal.

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

the control end of the second resistance switching circuit is connected with the first power supply circuit or the controller, the second resistance switching circuit is connected in parallel between the first end and the second end of the second thermistor, the first end of the second thermistor is also connected with the output end of the power supply switching circuit, the second end of the second thermistor is also connected with the input end of the second voltage conversion circuit, and the output end of the second voltage conversion circuit is connected with the backlight driving circuit;

the second resistance switching circuit is configured to, when the second signal output by the controller is received from the first power supply circuit or after power supply is performed, and the first power supply circuit starts to supply power to the second power supply circuit through the power supply switching circuit, control the second thermistor to be connected in series between the power supply switching circuit and the second voltage conversion circuit based on the second signal, and delay the preset time period;

the second resistance switching circuit is further configured to control the second thermistor to be connected between the power supply switching circuit and the second voltage conversion circuit in a short circuit after the preset duration;

the second voltage conversion circuit is used for converting the voltage output by the first power supply circuit and providing the backlight driving circuit with electric energy of the backlight light source positioned in the second area in the backlight assembly.

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

wherein a first end of the first resistor and a fourth end of the second relay are both connected with the controller or the first power circuit, the second end of the first resistor is respectively connected with the first end of the second capacitor and the cathode of the voltage regulator tube, the anode of the voltage-stabilizing tube is respectively connected with the first end of the second resistor and the base electrode of the first triode, the collector of the first triode is respectively connected with the anode of the second diode and the first end of the second relay, the cathode of the second diode is connected with the fourth end of the second relay, the second end of the second relay is connected with the first end of the second thermistor, the third end of the second relay is connected with the second end of the second thermistor, and the second end of the second capacitor, the second end of the second resistor and the emitter of the first triode are all grounded;

the second voltage conversion circuit includes: the second electromagnetic interference circuit, the second rectifying and filtering circuit, the second PFC circuit and the second LLC circuit;

the input end of the second electromagnetic interference circuit is connected with the output end of the second resistor switching circuit and the second end of the second thermistor respectively, the output end of the second electromagnetic interference circuit is connected with the input end of the second rectifying and filtering circuit, the output end of the second rectifying and filtering circuit is connected with the input end of the second PFC circuit, the output end of the second PFC circuit is connected with the input end of the second LLC circuit, and the output end of the second LLC circuit is connected with the backlight driving circuit.

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

the control end of the third resistance switching circuit is connected with the first power circuit and/or the controller, the third resistance switching circuit is connected between the first end and the second end of the second thermistor in parallel, the first end of the second thermistor is also connected with the output end of the power supply switching circuit, the second end of the second thermistor is also connected with the input end of the third voltage conversion circuit, and the output end of the third voltage conversion circuit is connected with the backlight driving circuit;

the third resistance switching circuit is configured to control the second thermistor to be connected in series between the power supply switching circuit and the third resistance switching circuit when the first power supply circuit starts to supply power to the second power supply circuit through the power supply switching circuit;

the third resistance switching circuit is further configured to receive the second signal after the preset time period passes from the first power circuit or the controller after power supply; based on the second signal, the second thermistor is controlled to be in short-circuit connection between the power supply switching circuit and the third resistor switching circuit;

the third voltage conversion circuit is used for converting the voltage output by the first power supply circuit and providing the backlight driving circuit with electric energy of the backlight light source positioned in the second area in the backlight assembly.

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

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

the third voltage conversion circuit includes: the third electromagnetic interference circuit, the third rectifying and filtering circuit, the third PFC circuit and the third LLC circuit;

the input end of the third electromagnetic interference circuit is connected with the output end of the third resistance switching circuit and the second end of the second thermistor respectively, the output end of the third electromagnetic interference circuit is connected with the input end of the third rectifying and filtering circuit, the output end of the third rectifying and filtering circuit is connected with the input end of the third PFC circuit, the output end of the third PFC circuit is connected with the input end of the third LLC circuit, and the output end of the third LLC circuit is connected with the backlight driving circuit.

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

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

the first end of the fourth capacitor, the cathode of the first diode and the fourth end of the first relay are all connected with the controller or the first power supply circuit, the third end of the first relay is connected with the first end of the fuse, the second end of the fuse is connected with the second power supply circuit, the second end of the first relay is respectively connected with the power supply equipment and the first power supply circuit, and the first end of the first relay, the anode of the first diode and the second end of the fourth capacitor are all grounded.

The application provides a display device, through when display device is electrified, first power supply circuit can the circular telegram and start work, and second power supply circuit does not circular telegram and can't start work for display device gets into standby mode, has saved display device's standby power. Moreover, when the display device needs the second power supply circuit to supply power, the controller can control the first power supply circuit to supply power to the second power supply circuit, so that the second power supply circuit can provide electric energy for the display device, and the display device is convenient to use.

Drawings

In order to more clearly illustrate the technical solutions in the present application or the related art, the drawings needed to be used in the description of the embodiments or the related art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without inventive labor.

FIG. 1 is a schematic diagram of an operational scenario between a display device and a control apparatus;

FIG. 2a is a diagram illustrating a hardware structure of a hardware system in the display device of FIG. 1;

FIG. 2b is a diagram illustrating a hardware structure of a hardware system in a display device;

FIG. 3 is a schematic diagram of the connection of the power supply assembly to the load of FIG. 2 a;

FIG. 4 is a schematic diagram of a power architecture of FIG. 2 a;

FIG. 5 is a block diagram of a hardware architecture of the display device of FIG. 2 a;

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

fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present application;

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

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

FIG. 10 is a schematic diagram of the first voltage converting circuit of FIG. 8;

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

fig. 12 is a schematic structural diagram of a display device according to an embodiment of the present application;

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

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

FIG. 15 is a schematic diagram of the second voltage converting circuit of FIG. 13;

fig. 16 is a schematic structural diagram of a display device according to an embodiment of the present application;

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

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

fig. 19 is a schematic structural diagram of a display device according to an embodiment of the present application;

fig. 20 is a schematic structural diagram of a display device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The display device provided by the embodiments of the present application may have a display device of a single system and a single display structure. For example, the display device includes: a display screen configured to display a screen image; a sound reproducing device configured to play sound; and a power supply circuit configured to supply power to a load of the display device, the load including the display screen, the sound reproducing apparatus, and the like.

Alternatively, the present application is mainly directed to a sound-picture synchronization process of a display device having a dual-system and dual-display structure, that is, a display device having a first controller (a first hardware system), a second controller (a second hardware system), a first display screen, and a second display screen, and the structure, function, implementation, and the like of the display device having the 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 connection of different peripheral devices or cables to implement corresponding functions. When a high-definition camera is connected to an interface of the display device, if a hardware system of the display device does not have a hardware interface of a high-pixel camera receiving the source code, data received by the camera cannot be displayed on a display screen of the display device.

Furthermore, due to the hardware structure, the hardware system of the conventional display device only supports one path of hard decoding resources, and usually only supports video decoding with a resolution of 4K at most, so when a user wants to perform video chat while watching a network television, the user needs to use the hard decoding resources (usually GPU in the hardware system) to decode the network video without reducing the definition of the network video screen, and in this case, the user can only process the video chat screen by using a general-purpose processor (e.g. CPU) in the hardware system to perform soft decoding on the video.

The soft decoding is adopted to process the video chat picture, so that the data processing burden of a CPU (central processing unit) can be greatly increased, and when the data processing burden of the CPU is too heavy, the problem of picture blocking or unsmooth flow can occur. Further, due to the data processing capability of the CPU, when the CPU performs soft decoding on the video chat screen, multi-channel video calls cannot be generally implemented, and when a user wants to perform video chat with multiple other users in the same chat scene, access is blocked.

In view of the above aspects, to overcome the above drawbacks, the present application discloses a dual-system hardware system architecture to implement multiple channels of video chat data (at least one channel of local video).

The concept to which the present application relates will be first explained below with reference to the drawings. It should be noted that the following descriptions of the concepts are only for the purpose of facilitating understanding of the contents of the present application, and do not represent limitations on the scope of the present application.

The term "module," as used in various embodiments of the present application, may refer to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and/or software code that is capable of performing the functionality associated with that element.

The term "remote control" as used in the embodiments of the present application refers to a component of an electronic device (such as the display device disclosed in the present application) that is capable of wirelessly controlling the electronic device, typically over a short distance. The component may typically be connected to the electronic device using infrared and/or Radio Frequency (RF) signals and/or bluetooth, and may also include functional modules such as WiFi, wireless USB, bluetooth, motion sensors, etc. For example: the hand-held touch remote controller replaces most of the physical built-in hard keys in the common remote control device with the user interface in the touch screen.

The term "user interface" as used in the embodiments of the present application is a media interface for interaction and information exchange between an application or operating system and a user, which enables conversion between an internal form of information and a user-acceptable form. A commonly used presentation form of the user interface is a Graphical User Interface (GUI), which refers to a user interface related to computer operations and displayed in a graphical manner. It may be an interface element such as an icon, a window, a control, etc. displayed in the display screen of the electronic device, where the control may include a visual interface element such as an icon, a button, a menu, a tab, a text box, a dialog box, a status bar, a navigation bar, a Widget, etc.

The term "gesture" as used in the embodiments of the present application refers to a user behavior used to express an intended idea, action, purpose, or result through a change in hand shape or an action such as hand movement.

The term "hardware system" used in the embodiments of the present application may refer to a physical component having computing, controlling, storing, inputting and outputting functions, which is formed by a mechanical, optical, electrical and magnetic device such as an Integrated Circuit (IC), a Printed Circuit Board (PCB) and the like. In various embodiments of the present application, a hardware system may also be referred to as a motherboard (or chip).

Fig. 1 is a schematic diagram illustrating an operation scenario between a display device and a control apparatus according to an embodiment. As shown in fig. 1, a user may operate the display apparatus 200 through the control device 100.

The control device 100 may be a remote controller 100A, which can communicate with the display device 200 through an infrared protocol communication, a bluetooth protocol communication, a ZigBee (ZigBee) protocol communication, or other short-range communication, and is used to control the display device 200 in a wireless or other wired manner. The user may input a user instruction through a key on the remote controller 100A, voice input, control panel input, or the like to control the display apparatus 200. Such as: the user can input a corresponding control command through a volume up/down key, a channel control key, up/down/left/right movement keys, a voice input key, a menu key, a power on/off key, etc. on the remote controller 100A to control the functions of the display device 200.

The control device 100 may also be an intelligent device, such as a mobile terminal 100B, a tablet computer, a notebook computer, and the like, which may communicate with the display device 200 through a Local Area Network (LAN), a Wide Area Network (WAN), a Wireless Local Area Network (WLAN), or other networks, and implement control of the display device 200 through an application program corresponding to the display device 200. For example, the display device 200 is controlled using an application program running on the smart device. The application may provide various controls to the User through an intuitive User Interface (UI) on a screen associated with the smart device.

For example, the mobile terminal 100B and the display device 200 may each have a software application installed thereon, so that connection 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 further realized. Such as: a control instruction protocol can be established between the mobile terminal 100B and the display device 200, a remote control keyboard is synchronized to the mobile terminal 100B, and the function of controlling the display device 200 is realized by controlling a user interface on the mobile terminal 100B; the audio and video content displayed on the mobile terminal 100B may also be transmitted to the display device 200, so as to implement a synchronous display function.

As shown in fig. 1, the display apparatus 200 may also perform data communication with the server 300 through various communication means. In various embodiments of the present application, the display device 200 may be allowed to be in a wired or wireless communication connection with the server 300 via a local area network, a wireless local area network, or other network. The server 300 may provide various contents and interactions to the display apparatus 200.

Illustratively, the display device 200 receives software Program updates, or accesses a remotely stored digital media library by sending and receiving information, and Electronic Program Guide (EPG) interactions. The servers 300 may be a group or groups, and may be one or more types of servers. Other web service contents such as a video on demand and an advertisement service are provided through the server 300.

The display device 200 includes: the display device comprises 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 from each other, and a double-hardware control system is adopted between the first display screen 201 and the second display screen 202.

The first display 201 and the second display 202 may be used to display different display screens. For example, the first display screen 201 may be used for screen display of conventional television programs, and the second display screen 202 may be used for screen display of auxiliary information such as notification type messages, voice assistants, and the like.

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. For example, when the first display screen 201 plays a television program, the second display screen 202 may display information such as time, weather, temperature, a reminder message, and the like, which are not related to the television program.

In some embodiments, there may also be an association between the content displayed by the first display screen 201 and the content displayed by the second display screen 202. For example, when the first display screen 201 plays a main screen of a video chat, the second display screen 202 may display information such as a head portrait, a chat duration, and the like of a user currently accessing the video chat.

In some embodiments, some or all of the content displayed by the second display screen 202 may be adjusted to the first display screen 201. For example, when the first display 201 plays a main screen of a video chat, information such as time, weather, temperature, and a reminder message displayed on the second display 202 may be adjusted to the first display 201 to be displayed, and the second display 202 may display other information.

In addition, the first display screen 201 displays a multi-party interactive picture while displaying a traditional television program picture, and the multi-party interactive picture does not block the traditional television program picture. The display mode of the traditional television program picture and the multi-party interactive picture is not limited by the application. For example, the position and the size of the traditional television program picture and the multi-party interactive picture can be set according to the priority of the traditional television program picture and the multi-party interactive picture.

Taking the example that the priority of the traditional television program picture is higher than that of the multi-party interactive picture, the area of the traditional television program picture is larger than that of the multi-party interactive picture, and the multi-party interactive picture can be positioned on one side of the traditional television program picture and can also be arranged in any area of the traditional television program picture in a floating manner.

The display device 200 may be, for example, a liquid crystal display, an oled (organic Light Emitting diode) display, or a projection display device; on the other hand, the display device can be a display system consisting of an intelligent television or a display and a set-top box. The specific display device type, size, resolution, etc. are not limiting, and those skilled in the art will appreciate that the display device 200 may be modified in performance and configuration as desired.

The display apparatus 200 may additionally provide an intelligent network tv function that provides a computer support function in addition to the broadcast receiving tv function. Examples include a web tv, a smart tv, an Internet Protocol Tv (IPTV), and the like. In some embodiments, the display device may not have a broadcast receiving television function.

As shown in fig. 1, a camera may be connected or disposed on the display device 200, and is used for presenting a picture taken by the camera on a display interface of the display device or other display devices, so as to implement an interactive chat between users. Specifically, the picture shot by the camera can be displayed on the display device in a full screen mode, a half screen mode or any optional area.

As a connection mode in some embodiments, the camera is connected with the rear shell of the display device through the connection board, and is fixedly installed in the middle of the upper side of the rear shell of the display device.

As another way of connection in some embodiments, the camera is connected to the rear housing of the display device through a connection board or other conceivable connector, which is capable of being lifted up and down, and the connector is provided with a lifting motor, and when the user wants to use the camera or has an application program to use the camera, the camera is lifted up from the display device, and when the user does not need to use the camera, the camera can be embedded in the rear housing, so that the camera is protected from being damaged and the privacy security of the user is protected.

As an embodiment, the camera adopted in the present application may have 1700 ten thousand pixels, so as to achieve the purpose of ultra high definition display. In actual use, cameras higher or lower than 1700 ten thousand pixels may also be used.

When the camera is installed on the display device, the contents displayed in different application scenes of the display device can be fused in various different modes, so that the function which cannot be realized by the traditional display device is achieved.

Illustratively, a user can conduct a video chat with at least one other user while watching a video program via a display device. In the display device, the presentation of the video program can be used as a background picture, and a window for video chat is displayed on the background picture. The vivid display device can be called as a display device with the function of 'watching while chatting'.

In some embodiments, in the application scenario of "chat while watching", a user conducts at least one video chat across terminals while watching a live video or a network video through a display device.

In another example, a user can engage in a video chat with at least one other user via a display device while entering an educational application for learning. For example, a student may interact remotely with a teacher while learning content in an educational application. The image can be called that the display device has the function of chatting while learning.

In another example, a user may play a card game while conducting a video chat with a player entering the game via a display device. For example, a player may enable remote interaction with other players when entering a gaming application to participate in a game. Figurative, the display device can be said to have a "see while play" function.

In some embodiments, in the display device, a game scene is fused with a video picture, a portrait in the video picture is scratched and displayed in the game picture, and the experience of a user is improved.

In some embodiments, in a motion sensing game (such as a ball playing game, a boxing game, a running game, a dancing game and the like), the posture and the motion of a human body, the detection and the tracking of limbs and the detection of key point data of human skeleton are acquired through a camera, and then the detection and the fusion with a game picture are carried out, so that the game of scenes such as sports, dancing and the like is realized.

In another example, a user may interact with at least one other user via a display device in video and voice while the karaoke application. Vividly, the display device can be called as having the function of 'seeing and singing while watching'.

In some embodiments, in the application scenario of "sing while watching", the user can complete recording of a song with other users through the display device while chatting the scenario.

In another example, a user may turn on a camera locally for pictures and videos via a display device. Figuratively, the display device may be said to have a "mirror" function.

In other examples, the display device may add more or reduce the above functions. The function of the display device is not particularly limited in the present application.

Fig. 2a schematically illustrates a hardware structure of a hardware system in the display device 200 according to an exemplary embodiment. For convenience of illustration, the display device 200 in fig. 2a is illustrated as a liquid crystal display.

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, a second panel 21, a second backlight assembly 22, a second rear case 23, a second display driving circuit 24, and a power supply assembly 30. Additionally, in some embodiments, the display device 200 may further include: a base or a suspension bracket. For convenience of illustration, the display device 200 in fig. 2a is illustrated by including a base 41, and the base 41 is used for supporting the display device 200. It should be noted that the drawings only show one type of base design, and those skilled in the art can design different types of bases according to the product requirements.

The first panel 11 is used for presenting the 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, the liquid crystal panel may include, in order from top to bottom: a horizontal polarizing plate, a color filter, a liquid crystal layer, a thin film transistor TFT, a vertical polarizing plate, a light guide plate, and a Printed Circuit Board (PCB), and a driving circuit such as a gate driving circuit and a source driving circuit is disposed on the PCB 17. The grid electrode driving circuit is connected with the grid electrode of the thin film transistor TFT through a scanning line, and the source electrode driving circuit is connected with the drain electrode of the thin film transistor TFT through a data line.

The first backlight assembly 12 is disposed below the first panel 11, and is generally an optical assembly for providing sufficient light source with uniform brightness and distribution, so that the first panel 11 can normally display images. The first backlight assembly 12 further includes a first back plate (not shown).

The first rear case 13 is disposed on the first panel 11 to cover the first backlight assembly 12, the first controller 14, the second controller 15, the first display driving circuit 16, the power supply assembly 30, and other components of the display device 200, thereby providing an aesthetic effect.

Wherein the first controller 14, the second controller 15, the first display driving circuit 16 and the power supply assembly 30 are disposed on the first back plate, and some convex hull structures are typically formed by stamping on the first back plate. The first controller 14, the second controller 15, the first display driving circuit 16, and the power supply module 30 are fixed to the convex hull by screws or hooks. The first controller 14, the second controller 15, the first display driving circuit 16 and the power supply module 30 may be disposed on a single board, or may be disposed on different boards, for example, the first controller 14 is disposed on a main board, the second controller 15 is disposed on an interactive board, the first display driving circuit 16 is disposed on the first display driving board, and the power supply module 30 is disposed on the power supply board, or may be disposed on different boards in combination, or may be disposed on a single board together with the first backlight module 12, and the configuration may be specifically set according to actual requirements, which is not limited in this application. For convenience of illustration, fig. 2a illustrates the first controller 14, the second controller 15, the first display driver circuit 16, and the power supply module 30 on a single board.

The first display driving circuit 16 mainly functions to: the multi-level backlight partition control is performed through the backlight driving signals transmitted by the first controller 14, such as the PWM signal and the localdiming signal, and the control is changed according to the image content, and after the handshake is established between the first controller 14 and the control, the VbyOne display signal transmitted by the first controller 14 is received, and the VbyOne display signal is converted into the LVDS signal, so that the image display of the first display screen 201 is realized.

Wherein the second panel 21 is used for presenting the picture 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 in the second panel may be as described in the foregoing, which is not described herein again.

The second backlight assembly 22 is disposed below the second panel 12, and is generally an optical assembly for providing sufficient light with uniform brightness and distribution to enable the second panel 12 to normally display images. The second backlight assembly 22 further includes a second back plate (not shown).

The second rear case 23 is disposed 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, thereby achieving an aesthetic effect.

The second display driving circuit 24 is disposed on the second back plate, and some convex hull structures are usually formed on the second back plate by stamping. The second display driving circuit 24 is fixed to the convex bag by a screw or a hook. The second display driving circuit 24 may be separately disposed on a board, such as the second display driving board, or may be disposed on a board together with the second backlight assembly 22, and the second display driving circuit may be disposed specifically according to actual requirements, which is not limited in this application. For convenience of explanation, fig. 2a illustrates the second display driving circuit 24 separately provided on one board.

In some embodiments, fig. 2a further includes a key sheet, where the key sheet may be disposed on the first back plate or the second back plate, which is not limited in this application. And a plurality of keys and key circuits are arranged on the key board, so that the first controller 14 or the second controller 15 can receive key signals from the key board, and the first controller 14 or the second controller 15 can send control signals to the key board.

In addition, the display device 200 further includes a sound reproducing means (not shown in the figure), such as an audio component, e.g., an I2S interface including a power Amplifier (AMP) and a Speaker (Speaker), etc., for realizing reproduction of sound. Usually, the sound components are capable of realizing sound output of at least two sound channels; when the panoramic surround effect is to be achieved, a plurality of acoustic components are required to be arranged to output sounds of a plurality of sound channels, and a detailed description thereof is omitted.

It should be noted that the display device 200 may also be an OLED display, and correspondingly, the template included in the display device 200 is changed accordingly, for example, since the OLED display can achieve self-luminescence, a backlight assembly (the first backlight assembly 12 and the second backlight assembly 22 in fig. 2 a) is not needed in the OLED display, and will not be described herein too much.

Alternatively, a display device with dual display screens is taken as an exemplary illustration as shown in fig. 2a, and a hardware configuration diagram of a hardware system in the display device according to an exemplary embodiment is exemplarily shown in fig. 2 b.

Among them, in the display device having 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 chassis 6. Wherein, the panel 1 is used for presenting pictures for users; the backlight assembly 2 is located below the panel 1, and is generally optical assemblies for providing sufficient brightness and uniformly distributed light sources to enable the panel 1 to normally display image contents, the backlight assembly 2 further includes a back plate 20, the controller 4 and the power supply assembly 5 are disposed on the back plate 20, and are generally stamped on the back plate 20 to form convex hull structures, and the controller 4 and the power supply assembly 5 are fixed on the convex hulls through screws or hooks; the rear shell 3 is covered on the panel 1 to jointly hide the parts of the display equipment such as the backlight component 2, the controller 4, the power supply component 5 and the like, thereby achieving the effect of attractive appearance; and a base 6 for supporting the display device.

The controller 4 and the power supply module 5 may be disposed on a single board, or may be disposed on a single board together with the backlight module, and may be specifically disposed according to actual requirements, which is not limited in this application. For ease of illustration, in fig. 2b, the controller 4 and the power supply assembly 5 are provided together on one board.

Fig. 3 shows a schematic diagram of the connection relationship between the power module and the load IN fig. 2a, and as shown IN fig. 3, the power module 30 includes an input terminal IN connected to an AC power source AC (such as commercial power) and an output terminal OUT (a first output terminal OUT1, a second output terminal OUT2, a third output terminal OUT3, a fourth output terminal OUT4 and a fifth output terminal OUT5 are shown), wherein the output terminal OUT is connected to the load, for example, a first output terminal OUT1 is connected to the sound reproducing apparatus, a second output terminal OUT2 is connected to the first panel 11/the second panel 21, a third output terminal OUT3 is connected to the first backlight module 12/the second backlight module 22, a fourth output terminal OUT4 is connected to the first controller 14/the second controller 15, and a fifth output terminal 5 is connected to the first display driving circuit 16/the second display driving circuit 24. The power supply 30 needs to convert the ac power into dc power required by the load, and the dc power is usually of different specifications, for example, 18V is required for the audio components, 12V/18V is required for the first controller 14, etc.

The power supply control device can adopt a single power supply control structure, a double power supply control structure or a multi-power supply control structure. For convenience of explanation, a dual power control structure is taken as an example to be exemplified on the basis of the embodiment shown in fig. 2a and fig. 4.

Fig. 4 shows a detailed description of one power architecture in the present application. Referring to fig. 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 first power circuit 31 and the second power circuit 32 have substantially the same structure, and the operation principle will be described in detail below mainly by taking the first power circuit 31 as an example.

The first power supply circuit 31 may include a first rectifying and smoothing circuit, a first PFC circuit, and a first LLC circuit, which are connected in sequence.

The first rectifying and filtering circuit may specifically include: the rectifier bridge is used for rectifying input alternating current and inputting full-wave signals to a Power Factor Correction (PFC) circuit. Before the AC power is input to the first PFC circuit, an Electromagnetic Interference (EMI) filter may be connected to high-frequency filter the input AC power.

The first PFC circuit generally includes a PFC inductor, a switching power device, and a PFC control chip, and mainly performs power factor correction on an input Alternating Current (AC) power source to output a stable dc bus voltage (e.g., 380V) to the first resonant converter (LLC) circuit. The first PFC circuit can effectively improve the power factor of a power supply and ensure the same phase of voltage and current.

The first LLC circuit may adopt a double-MOS transistor LLC resonant conversion circuit, and may further include a Pulse Frequency Modulation (PFM) circuit, a capacitor, an inductor, and other components. The first LLC circuit may 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 a load as shown in fig. 3. Typically, the first LLC circuit is capable of outputting a plurality of different voltages to meet the requirements 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 may further control the first LLC circuit to supply power (e.g., a supply voltage with a magnitude of 12V or 18V) to the second controller 15, the first display driving circuit 16, the second display driving circuit 24, the keypad, and the second backlight assembly 22, so as to ensure that each board can operate.

In some embodiments, the first power circuit 31 may further include a first synchronous rectification circuit (not shown), which may include a transformer, a controller, two MOS transistors, and a diode, and is directly capable of outputting a stable target voltage, such as 12V or 18V. It should be noted that the first synchronous rectification circuit may be provided separately, or may be provided in the first LLC circuit.

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

The second power circuit 32 may include a second rectifying and smoothing circuit, a second PFC circuit, and a second LLC circuit connected in sequence. The alternating current of the second power circuit 32 is derived from the first power circuit 31 or the commercial power, and the second LLC circuit can supply power to the first backlight assembly 12. The description of the remaining respective circuits refers to the description of the first power supply circuit 31. In some embodiments, the second power supply circuit 32 further comprises a second synchronous rectification circuit, wherein the second synchronous rectification circuit may refer to an implementation form of the first synchronous rectification circuit.

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

Wherein the first backlight indication signal is used for indicating to turn on the backlight light source of the first area in the first display screen 201 (i.e. the first panel 11). The second backlight indication signal is used to indicate that the backlight light sources of the second area in the first display screen 201 (i.e. the first panel 11) are turned on. The first area and the second area together constitute a part or all of the area displayable by the first display screen 201.

For ease of description, one hardware system in a dual hardware system architecture will be referred to hereinafter as a first hardware system or a first controller, and the other hardware system will be referred to hereinafter as a second hardware system or a second controller. The first controller comprises various processors and various interfaces of the first controller, and various modules connected with the first controller through the various interfaces, and the second controller comprises various processors and various interfaces of the second controller, and various modules connected with the second controller through the various interfaces. The first controller and the second controller may each have a relatively independent operating system installed therein, 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, which is as follows: the frame layer of the operating system of the first controller and the frame layer of the operating system of the second controller can communicate for the transmission of commands and data, so that there are two independent but interrelated subsystems in the display device 200.

The dual hardware system architecture of the present application is further described below with reference to fig. 5. It should be noted that fig. 5 is only an exemplary illustration of the dual hardware system architecture of the present application, and does not represent a limitation of the present application. In actual practice, both hardware systems may contain more or less hardware or interfaces as desired.

A block diagram of the hardware architecture of the display device 200 according to fig. 2a is exemplarily shown in fig. 5. As shown in fig. 5, the hardware system of the display apparatus 200 may include a first controller 210 (i.e., the first controller 14 in fig. 2 a) and a second controller 310 (i.e., the second controller 15 in fig. 2 a), and modules connected to the first controller 210 or the second controller 310 through various interfaces.

In some embodiments, the first controller 210 mainly implements a conventional television function (such as an external set-top box, etc.), and may control the first display screen 280 (i.e., the first display screen 201 in fig. 1) to display corresponding image content. The second controller 310 may be configured to receive the instruction sent by the first controller 210 and control the second display screen 380 (i.e., the second display screen 202 in fig. 1) to display corresponding image content.

The modules connected to the first controller 210 may include a tuning 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, a first display screen 280 (i.e., the first display screen 201 in fig. 2 a), an audio output interface 270, and a power supply module 240. In other embodiments, the first controller 210 may include more or fewer modules connected.

The tuning demodulator 220 is configured to perform modulation and demodulation processing such as amplification, mixing, resonance and the like on a broadcast television signal received in a wired or wireless manner, so as to demodulate an audio/video signal carried in a frequency of a television channel selected by a user and additional information (e.g., an EPG data signal) from a plurality of wireless or wired broadcast television signals. Depending on the broadcast system of the television signal, the signal path of the tuner 220 may be various, such as: terrestrial broadcasting, cable broadcasting, satellite broadcasting, internet broadcasting, or the like; according to different modulation types, the adjustment mode of the signal can be a digital modulation mode or an analog modulation mode; and depending on the type of television signal being received, tuner demodulator 220 may demodulate analog and/or digital signals.

The tuner demodulator 220 is also operative to respond to the user-selected television channel frequency and the television signal carried thereby, in accordance with the user selection and as controlled by the first controller 210.

In other exemplary embodiments, the tuner/demodulator 220 may be in an external device, such as an external set-top box. In this way, the set-top box outputs television audio/video signals after modulation and demodulation, and the television audio/video signals are input into the display device 200 through the external device interface 250.

The communicator 230 is a component for communicating with an external device or an external server according to various communication protocol types. For example: the communicator 230 may include a WIFI module 231, a bluetooth communication protocol module 232, a wired ethernet communication protocol module 233, and other network communication protocol modules such as an infrared communication protocol module or a near field communication protocol module (not shown).

The display apparatus 200 may establish a connection of a control signal and a data signal with an external control apparatus or a content providing apparatus 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 for providing data transmission between the first controller 210 and the second controller 310 or other external devices. The external device interface 250 may be connected with an external apparatus such as a set-top box, a game device, a notebook computer, etc. in a wired/wireless manner, and may receive data such as a video signal (e.g., moving image), an audio signal (e.g., music), additional information (e.g., EPG), etc. of the external apparatus.

The external device interface 250 may include: a High Definition Multimedia Interface (HDMI) terminal is also referred to as HDMI 251, a Composite Video Blanking Sync (CVBS) terminal is also referred to as AV 252, an analog or digital component terminal is also referred to as component 253, a Universal Serial Bus (USB) terminal 254, a Red Green Blue (RGB) terminal (not shown in the figure), and the like. The number and type of external device interfaces are not limited by this application.

The first controller 210 controls the operation of the display apparatus 200 and responds to the operation of the user by running various software control programs (e.g., 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 graphic processor 216, a CPU processor 212, a communication interface 218, and a communication bus. The RAM 213 and the ROM 214, the graphic processor 216, the CPU processor 212, and the communication interface 218 are connected via a bus.

A ROM 213 for storing instructions for various system boots. If the display device 200 is powered on upon receipt of the power-on signal, the CPU processor 212 executes a system boot instruction in the ROM and copies the operating system stored in the memory 290 to the RAM 214 to start running the boot operating system. After the start of the operating system is completed, the CPU processor 212 copies the various application programs in the memory 290 to the RAM 214, and then starts running and starting the various application programs.

A graphics processor 216 for generating various graphics objects, such as: icons, operation menus, user input instruction display graphics, and the like. The display device comprises an arithmetic unit which carries out operation by receiving various interactive instructions input by a user and displays various objects according to display attributes. And a renderer for generating various objects based on the operator, and displaying the rendered result on the first display screen 280.

A CPU processor 212 for executing operating system and application program instructions stored in memory 290. And executing various application programs, data and contents according to various interactive instructions received from the outside so as to finally display and play various audio and video contents.

In some exemplary embodiments, the CPU processor 212 may include a plurality of processors. The plurality of processors may include a main processor and a plurality of or a sub-processor. A main processor for performing some operations of the display apparatus 200 in a pre-power-up mode and/or operations of displaying a screen in a normal mode. A plurality of or one sub-processor for performing an operation in a standby mode or the like.

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

The first controller 210 may control operations of the display device 200 in relation to the first display screen 280. For example: in response to receiving a user command for selecting a UI object 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 operations of the display apparatus 200 in relation 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 selectable objects, such as a hyperlink or an icon. Operations related to the selected object, such as: displaying an operation connected to a hyperlink page, document, image, or the like, or performing an operation of a program corresponding to an icon. The user command for selecting the UI object may be a command input through various input means (e.g., a mouse, a keyboard, a touch pad, etc.) connected to the display apparatus 200 or a voice command corresponding to a voice spoken by the user.

The memory 290 includes a memory for storing various software modules for driving and controlling the display apparatus 200. Such as: various software modules stored in memory 290, including: a base module, a detection module, a communication module, a display control module, a browser module, and various service modules, etc. (not shown in the figure).

The basic module is a bottom layer software module for signal communication between hardware in the display device 200 and sending processing and control signals to an upper layer module. The detection module is a management module used for collecting various information from various sensors or user input interfaces, and performing digital-to-analog conversion and analysis management. The voice recognition module comprises a voice analysis module and a voice instruction database module. The display control module is a module for controlling the first display 280 to display image content, and may be used to play information such as multimedia image content and UI interface. The communication module is used for carrying out control and data communication with external equipment. And the browser module is used for executing data communication between the browsing servers. The service module is a module for providing various services and various application programs.

Meanwhile, the memory 290 is also used to store visual effect maps and the like for receiving external data and user data, images of respective items in various user interfaces, and a focus object.

A user input interface 260-3 for transmitting an input signal of a user to the first controller 210 or transmitting a signal output from the first controller 210 to the user. For example, the control device (e.g., a mobile terminal or a remote controller) may transmit an input signal, such as a power switch signal, a channel selection signal, a volume adjustment signal, etc., input by the user to the user input interface, and then the input signal is forwarded to the first controller 210 through the user input interface 260-3; alternatively, the control device may receive an output signal such as audio, video or data processed by the first controller 210 and output from the user input interface 260-3, and display or output the received output signal in audio or vibration form.

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 receives the user input command by recognizing the sound or gesture through the sensor.

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

Illustratively, the video processor 260-1 includes a demultiplexing module, a video decoding module, an image synthesizing module, a frame rate conversion module, a display formatting module, and the like (not shown in the figure).

The demultiplexing module is used for demultiplexing the input audio and video data stream, and if the input MPEG-2 is input, the demultiplexing module demultiplexes the input audio and video data stream into a video signal and an audio signal.

And the video decoding module is used for processing the video signal after demultiplexing, including decoding, scaling and the like.

And the image synthesis module, such as an image synthesizer, is used for performing superposition mixing processing on the GUI signal input by the user or generated by the user and the video picture after the zooming processing by the graphics generator so as to generate an image signal for display.

The frame rate conversion module is configured to convert a frame rate of an input video, such as a frame rate of an input 24Hz, 25Hz, 30Hz, or 60Hz video into a frame rate of 60Hz, 120Hz, or 240Hz, where the input frame rate may be related to a source video stream, and the output frame rate may be related to a refresh rate of a display device. And a display formatting module for converting the signal output by the frame rate conversion module into a signal conforming to a display format of a display device, such as converting the format of the signal output by the frame rate conversion module to output RGB data signals.

First display screen 280 for receiving image signals from video processor 260-1 for displaying video content and images and menu manipulation interface first display screen 280 includes a display screen assembly for presenting a picture and a driving assembly for driving the display of the image. The video content may be displayed from the video in the broadcast signal received by the tuner/demodulator 220, or from the video content input from the communicator or the external device interface. The first display screen 280 simultaneously displays a user manipulation interface UI generated in the display apparatus 200 and used to control the display apparatus 200.

And a driving assembly for driving the display according to the type of the first display screen 280. Alternatively, a projection device and a projection screen may be included, provided that the first display screen 280 is a projection display screen.

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

An audio output interface 270 for receiving the audio signal output by the audio processor 260-2 under the control of the first controller 210, wherein the audio output interface may include a speaker 272 or an external sound output terminal 274 for outputting to a generating device of an external device, such as: external sound terminal or earphone output terminal.

In other exemplary embodiments, video processor 260-1 may comprise one or more chip components. 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 in one or more chips together with the first controller 210.

And a power supply module 240 for providing power supply support for the display device 200 by the power input from the external power source under the control of the first controller 210. The power supply module 240 may include a built-in power supply circuit installed inside the display apparatus 200, or may be a power supply installed outside the display apparatus 200, such as a power supply interface for providing an external power supply in the display apparatus 200.

Similar to the first controller 210, as shown in fig. 5, the module connected to the second controller 310 may include a communicator 330, a detector 340, a memory 390, and a second display screen 380 (i.e., the second display screen 202 in fig. 1). A user input interface, a video processor, an audio output interface (not shown) may also be included in some embodiments. In some embodiments, there may also be a power supply module (not shown) that independently powers the second controller 310.

The communicator 330 is a component for communicating with an external device or an external server according to various communication protocol types. For example: the communicator 330 may include a WIFI module 331, a bluetooth communication protocol module 332, a wired ethernet communication protocol module 333, and other network communication protocol modules such as an infrared communication protocol module or a near field communication protocol module (not shown).

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 module 231 within the hardware system of the first controller 210 is used to connect to an external network, generate network communication with an external server, and the like. The WiFi module 331 in the hardware system of the second controller 310 is used to connect to the WiFi module 231 of the first controller 210 without making a direct connection with an external network or the like, and the second controller 310 is connected to the external network through the first controller 210. Therefore, for the user, a display device as in the above embodiment displays a WiFi account to the outside.

The detector 340 is a component of the second controller 310 for collecting signals of an external environment or interaction with the outside. The detector 340 may include a light receiver 342, a sensor for collecting the intensity of ambient light, which may be used to adapt to display parameter changes, etc.; the system may further include an image collector 341, such as a camera, a video camera, etc., which may be configured to collect external environment scenes, collect attributes of the user or interact gestures with the user, adaptively change display parameters, and identify user gestures, so as to implement a function of interaction with the user.

An external device interface 350, which provides a component for data transmission between the second controller 310 and the first controller 210 or other external devices. The external device interface may be connected with an external apparatus such as a set-top box, a game device, a notebook computer, etc. in a wired/wireless manner.

A video processor 360 for processing the associated video signal.

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

As shown in fig. 5, the second controller 310 includes a read only memory ROM 313, a random access memory RAM 314, a graphic processor 316, a CPU processor 312, a communication interface 318, and a communication bus. The ROM 313 and the RAM 314, the graphic processor 316, the CPU processor 312, and the communication interface 318 are connected via a bus.

A ROM 313 for storing instructions for various system boots. CPU processor 312 executes system boot instructions in ROM and copies the operating system stored in memory 390 to RAM 314 to begin running the boot operating system. After the start of the operating system is completed, the CPU processor 312 copies various application programs in the memory 390 to the RAM 314, and then starts running and starting various application programs.

A CPU processor 312 for executing the operating system and application program instructions stored in the memory 390, communicating with the first controller 210, transmitting and interacting signals, data, instructions, etc., and executing various application programs, data and contents according to various interactive instructions receiving external input, so as to finally display and play various audio-video contents.

The communication interface 318 is plural and 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 may be network interfaces connected to the first controller 210 via a network.

The second controller 310 may control operations of the display device 200 in relation to the second display screen 380. For example: in response to receiving a user command for selecting a UI object 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 operations of the display device 200 in relation to the first display screen 280. For example: in response to receiving a user command for selecting a UI object displayed on the first display 280, the first controller 210 may perform an operation related to the object selected by the user command.

A graphics processor 316 for generating various graphics objects, such as: icons, operation menus, user input instruction display graphics, and the like. The display device comprises an arithmetic unit which carries out operation by receiving various interactive instructions input by a user and displays various objects according to display attributes. And a renderer for generating various objects based on the operator, and displaying the rendered result on the second display screen 380.

The graphics processor 316 of the second controller 310 and the graphics processor 216 of the first controller 210 are both capable of generating various graphics objects. In distinction, if the application 1 is installed in the second controller 310 and the application 2 is installed in the first controller 210, the graphic object is generated by the graphic processor 316 of the second controller 310 when the user performs the instruction input by the user in the application 1 at the interface of the application 1. When a user is at the interface of the application 2 and an instruction input by the user is made within the application 2, a graphic object is generated by the graphic processor 216 of the first controller 210.

Fig. 6 is a diagram schematically illustrating 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 used to store an operating system, an application program, contents, user data, and the like, respectively, and perform system operations for driving the first display screen 280 and the second display screen 380 and various operations in response to a user under the control of the second controller 310 and the second controller 210. The memory 390 of the second controller 310 and the memory 290 of the first controller 210 may include volatile and/or non-volatile memory.

As for the first controller 210, the memory 290 is specifically used for storing an operating program for driving the first controller 210 in the display device 200, and storing various applications built in the display device 200, various applications downloaded by a user from an external device, various graphical user interfaces related to the applications, various objects related to the graphical user interfaces, user data information, and internal data of various supported applications. The memory 290 is used to store system software such as an Operating System (OS) kernel, middleware, and applications, and to store input video data and audio data, and other user data.

The memory 290 is specifically used for storing drivers and related data such as the video processor 260-1 and the audio processor 260-2, the first display 280, the communicator 230, the tuner demodulator 220, the input/output interface, and the like.

In some embodiments, memory 290 may store software and/or programs, software programs for representing an Operating System (OS) including, for example: a kernel, middleware, an Application Programming Interface (API), and/or an application program. For example, the kernel may control or manage system resources, or functions implemented by other programs (e.g., the middleware, APIs, or applications), and the kernel may provide interfaces to allow the middleware and APIs, or applications, to access the controller to implement controlling or managing system resources.

The memory 290, for example, includes a broadcast receiving module 2901, a channel control module 2902, a volume control module 2903, an image control module 2904, a display control module 2905, a first audio control module 2906, an external instruction recognition module 2907, a communication control module 2908, a light receiving module 2909, a power control module 2910, an operating system 2911, and other applications 2912, a browser module 2913, and so forth. The first controller 210 performs operations such as: the system comprises a broadcast television signal receiving and demodulating function, a television channel selection control function, a volume selection control function, an image control function, a display control function, an audio control function, an external instruction identification function, a communication control function, an optical signal receiving function, an electric power control function, a software control platform supporting various functions, a browser function and other various functions.

The memory 390 includes a memory storing various software modules for driving and controlling the display apparatus 200. Such as: various software modules stored in memory 390, including: a base module, a detection module, a communication module, a display control module, a browser module, and various service modules, etc. (not shown in the figure). Since the functions of the memory 390 and the memory 290 are similar, reference may be made to the memory 290 for relevant points, and thus, detailed description thereof is omitted here.

Illustratively, the memory 390 includes an image control module 3904, a second audio control module 3906, an external instruction recognition module 3907, a communication control module 3908, a light receiving module 3909, an operating system 3911, and other application programs 3912, a browser module 3913, and the like. The first controller 210 performs operations such as: the system comprises an image control function, a display control function, an audio control function, an external instruction identification function, a communication control function, an optical signal receiving function, an electric power control function, a software control platform supporting various functions, a browser function and other various functions.

Differently, the external instruction recognition module 2907 of the first controller 210 and the external instruction recognition module 3907 of the second controller 310 may recognize different instructions.

Illustratively, since the image receiving device such as a camera is connected to the second controller 310, the external instruction recognition module 3907 of the second controller 310 may include the pattern recognition module 2907-1, a pattern database is stored in the pattern recognition module 3907-1, and when the camera receives an external pattern instruction, the camera corresponds to the instruction in the pattern database to perform instruction control on the display device. Since the voice receiving device and the remote controller are connected to the first controller 210, the external command recognition module 2907 of the first controller 210 may include a voice recognition module 2907-2, a voice database is stored in the voice recognition module 2907-2, and when the voice receiving device receives an external voice command or the like, the voice receiving device and the like perform a corresponding relationship with a command in the voice database to perform command control on the display device. Similarly, the control device 100 such as a remote controller is connected to the first controller 210, and the button command recognition module 2907-3 performs command interaction with the control device 100.

Next, a detailed description is given of a specific structure of the display device by way of specific embodiments.

Fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present application. As shown in fig. 7, the display device 700 of the present application may include: the display screen 701, the backlight assembly 702, the power supply assembly 703, the TCON circuit 704, the backlight driving circuit 705 and the controller 706, and the power supply assembly 703 may be provided with a first power supply circuit 7031 and a 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 circuit 7031 is connected to a power supply device, and the input end of the first power circuit 7031 is further connected to the second power 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 a plurality of 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.

The display screen 701 may be any display screen used for displaying image content in the display device 700, and the implementation form of the display screen 701 is not limited in this application. For example, the display 701 may be the first display 280 in fig. 5, and may be disposed on the aforementioned first display 201. The display 701 may also be the second display 380 of fig. 5, and may be disposed on the second display 202 mentioned above.

The backlight assembly 702 is the aforementioned first backlight assembly 12 or the second backlight assembly 22, and the present application is not limited to the specific implementation form of the backlight assembly 702. And the backlight assembly 702 is used to provide a backlight light source to the display 701 so that the display 701 can display image content.

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

Those skilled in the art will appreciate that to achieve a clear display on the display device 700, the backlight source in the backlight assembly 702 needs to be very bright. Therefore, in the present application, the first power circuit 7031 and the second power circuit 7032 are respectively used to supply power to the backlight source in the backlight assembly 702, so that the backlight source reaches a desired brightness, and the display device 700 has a high image quality.

The backlight source may include, but is not limited to, a backlight Lamp strip such as a Light Emitting Diode (LED) or a Cold Cathode Fluorescent Lamp (CCFL).

In order to ensure the picture quality of the display apparatus 200, the display apparatus 200 employs a thousand-level backlight partition control based on the picture 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 the present application does not limit the division of the display area.

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

The first power circuit 7031, similar to the function of the aforementioned first power circuit 31, may be disposed on the power supply assembly 30 shown in fig. 2a for supplying power to the controller 706, the second power circuit 7032, the backlight driving circuit 705 and the backlight light source located in the first region in the backlight assembly 702. In addition, the first power circuit 7031 may also transmit a first backlight indication signal (not illustrated in fig. 7) to the backlight driving circuit 705, where the first backlight indication signal is used to instruct the backlight driving circuit 705 to turn on the backlight light source in the first region.

The first power circuit 7031 supplies power to the backlight source in the first region of the backlight assembly 702 by supplying power required by the backlight source in the first region of the backlight assembly 702 to the backlight driving circuit 705 through the first power circuit 7031 (not shown in fig. 7). And the present application does not limit the specific implementation form of the first power circuit 7031. In addition, the first power supply circuit 7031 can also supply power to a sound reproducing device (not illustrated in fig. 7) such as an audio component in the display apparatus 700.

A second power circuit 7032, similar to the function of the second power circuit 32 mentioned above, the second power circuit 7032 may be disposed on the power supply assembly 30 shown in fig. 2a for supplying power to the TCON circuit 704 and the backlight light source located in the second region of the backlight assembly 702. In addition, the second power circuit 7032 may further transmit a second backlight indication signal (not shown in fig. 7) to the backlight driving circuit 705, where the second backlight indication signal is used to indicate the backlight driving circuit 705 to turn on the backlight source in the second region, and the first region and the second region together form a part or a whole of the displayable region of the display panel 701.

The second power circuit 7032 supplies power to the backlight source in the second region of the backlight assembly 702 by supplying power required by the backlight assembly 702 to the backlight driving circuit 705 through the second power circuit 7032 (not shown in fig. 7). And the specific implementation form of the second power circuit 7032 is not limited in this application. In addition, the second power supply circuit 7032 may also supply power to a sound reproducing device (not illustrated in fig. 7) such as an audio component in the display apparatus 700.

The controller 706 may be the aforementioned first controller 210, or may be another System On Chip (SOC), and the specific implementation form of the controller 706 is not limited in this application. And the controller 706 may transmit a backlight driving signal (illustrated by signal 3 in fig. 7) to the backlight driving circuit 705, so that the backlight driving circuit 705 may control the backlight effect such as the overall brightness and the local brightness of the backlight light source in the backlight assembly 702 based on the backlight driving signal.

For example, the backlight driving signal may include a PWM signal for controlling the overall luminance of the backlight light sources in the backlight assembly 702 and a localdiming signal for controlling the local luminance of the backlight light sources in the backlight assembly 702 based on the content of the image displayed on the display screen 701. The PWM signal may be sent from the controller 706 to the backlight driving circuit 705 indirectly through the first power circuit 7031, or may be sent from the controller 706 to the backlight driving circuit 705 directly. To ensure that the Localdim signal is not disturbed by other signals, the Localdim signal is typically sent directly by the controller 706 to the backlight circuit 705.

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

The backlight driving circuit 705 may be disposed in the aforementioned first display driving circuit 16, and the present application does not limit the specific implementation form of the backlight driving circuit 705. The backlight driving circuit 705 may provide power to the backlight assembly 702 to turn on the backlight light source according to the first backlight indication signal and the second backlight indication signal, and may control the brightness of the backlight light source in the backlight assembly 702 according to the backlight driving signal.

Since the standby power consumption of the display apparatus 700 is the sum of 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 driving circuit 705, and the controller 706. It will be appreciated by those skilled in the art 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 are almost not operated, and the power consumption is close to 0. Therefore, the standby power consumption of the display device 700 mainly includes the sum of the power consumptions 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 a standby mode. At this time, the first power supply circuit 7031 is powered on and starts operating based on the input terminal of the first power supply circuit 7031 being connected to the power supply apparatus. And since the display screen 701, the backlight assembly 702, the TCON circuit 704, the backlight driving circuit 705 and the controller 706 are almost not operated and the load is small in the standby mode of the display device 700, the first power circuit 7031 enters the frequency hopping mode to meet the power requirement of the small load, so that the power consumption of the first power circuit 7031 is minimized.

At this time, the second power circuit 7032 may not be energized based on the input terminal of the second power circuit 7032 not being connected to the power supply apparatus, or the controller 706 may control the second power circuit 7032 not to be energized.

In some embodiments, based on the input terminal of the first power circuit 7031 being connected to the input terminal of the second power circuit 7032 through the power switching circuit 7033, the second power circuit 7032 can be disconnected from the power supply device only by turning off the power switching circuit 7033 by the controller 706, so that the second power circuit 7032 cannot be started without being powered on. Therefore, the power consumption of the second power supply circuit 7032 is minimized, and thus, the standby power of the display apparatus 700 is minimized, so that the standby power of the display apparatus 700 is reduced.

When the second power circuit 7032 is required to provide power, the controller 706 can control the first power circuit 7031 to supply power to the second power circuit 7032 so that the second power circuit 7032 can supply power to the rest of the components in the display device. In some embodiments, the controller 706 may initiate operation by turning on the power switching circuit 7033 such that the first power circuit 7031 supplies power to the second power circuit 7032 such that the second power circuit 7032 is conductive.

Based on the foregoing description, with reference to fig. 1-6, in order for the display apparatus 200 to have high picture quality and brightness index, the display apparatus 200 needs to provide high power to the backlight assembly. Therefore, when the display device 200 applies larger overall power, the power supply assembly 30 generally adopts a dual power supply architecture to supply power, for example, the dual power supply architecture may include the first power supply circuit 31 and the second power supply circuit 32 connected in parallel in fig. 4, so as to meet the power supply requirement and the picture quality of the display device 200. For example, the overall power required for the display device 200 is 700W, and the power supply assembly 30 outputs 350W using two single boards placed in parallel.

In addition, according to the display device provided by the application, when the display device is powered on, the first power supply circuit can be powered on and started to work, and the second power supply circuit is not powered on and cannot be started to work, so that the display device enters a standby mode, and the standby power of the display device is saved. The superposition of the standby power consumption of the first power supply circuit and the second power supply circuit is a main component of the standby power of the display device. Based on the above description, the present application provides a display device, which can control the starting sequence of the first power circuit and the second power circuit, not only can solve the problem of large standby power consumption, but also can ensure that the display device has high picture quality, so that the brightness index of the display device meets the display requirement. Moreover, when the display device needs the second power supply circuit to supply power, the controller can control the first power supply circuit to supply power to the second power supply circuit, so that the second power supply circuit can provide electric energy for the display device, and the display device is convenient to use.

With continued reference to fig. 7, the activated first power circuit 7031 may provide power to the controller 706 based on the connection between the first power pin (indicated by numeral 31 in fig. 7) of the first power circuit 7031 and the power pin (indicated by numeral 11 in fig. 7) of the controller 706, so that the controller 706 may operate normally.

In one aspect, the powered controller 706 may control the first power supply circuit 7031 to start to supply power to the backlight driving circuit 705 for the backlight light source located in the first region of the backlight assembly 702 based on the connection between the second power supply pin (indicated by numeral 32 in fig. 7) of the first power supply circuit 7031 and the first power supply pin (indicated by numeral 21 in fig. 7) of the backlight driving circuit 705, so that the backlight light source located in the first region of the backlight assembly 702 may be turned on.

On the other hand, the controller 706 after supplying power may also control the power supply device or the first power circuit 7031 to supply power to the second power circuit 7032 through the power supply switching circuit 7033, so that the second power circuit 7032 starts to be activated. Accordingly, the activated second power supply circuit 7032 may start to supply power to the backlight driving circuit 705 for the backlight light source located in the second region of the backlight assembly 702 based on the connection between the power supply pin (indicated by numeral 33 in fig. 7) of the second power supply circuit 7032 and the second power supply pin (indicated by numeral 22 in fig. 7) of the backlight driving circuit 705, so that the backlight light source located in the second region of the backlight assembly 702 may be turned on.

In this application, the backlight 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 source in the backlight assembly 702, so that the backlight source in the backlight assembly 702 has higher brightness, and the picture quality of the display device 700 is improved.

The application provides a display device, through when display device is electrified, first power supply circuit can the circular telegram and start work, and second power supply circuit does not circular telegram and can't start work for display device gets into standby mode, has saved display device's standby power.

Based on the connection between the first power circuit and the backlight driving circuit, the controller can control the first power circuit to supply the backlight driving circuit with the electric energy of the backlight power source in the first region of the backlight assembly.

Based on the connection between the first power circuit and the second power circuit through the power supply switching circuit and the connection between the second power circuit and the backlight driving circuit, the controller can control the second power circuit to supply electric energy of the backlight power source positioned in the second area in the backlight assembly to the backlight driving circuit, and the first area and the second area form a display area of the display screen, so that the backlight assembly can start the backlight light source under the power supply of the first power circuit and the second power circuit.

In the application, the standby power consumption of the display device is saved by controlling the starting sequence of the first power circuit and the second power circuit, the electric energy of the backlight power supply in the backlight assembly is respectively transmitted to the first power circuit and the second power circuit, the power supply process of the double power supplies to the backlight assembly is realized, the power supply power of the display device is improved, the brightness of the backlight light source in the backlight assembly is ensured, the backlight effect of the display device is ensured, and the picture quality of the display device is improved.

In conjunction with fig. 1 to 6, thermistors are generally provided at front positions (such as a connection between the AC power supply AC and the first rectifying and filtering circuit and a connection between the relay and the second rectifying and filtering circuit in fig. 4) at which the first power supply circuit 31 and the second power supply circuit 32 are connected to the power supply device (the AC power supply AC input in fig. 4 is supplied from the power supply device, and the power supply device is not shown in fig. 4), respectively, and the thermistors are connected in series to the live line (L) or the neutral line (N). When the display device 200 is powered on, the thermistor can limit current, and surge current generated by the corresponding first power circuit 31 or second power circuit 32 can be applied to the thermistor, so that influence of the surge current on rear end components such as a rectifying circuit and an electrolytic capacitor in the first power circuit 31 or second power circuit 32 is avoided. However, when the power supply module 30 is operating normally at a higher power, the thermistor will pass a higher current, which may cause the thermistor to overheat and be damaged.

Based on the above description, the display device 700 of the present application, in addition to solving the problem of large standby power consumption and realizing that the display device 700 has high picture quality and brightness index, can not only realize current limiting through the thermistor, so that the surge current generated by the power supply assembly can pass through the thermistor to play a role in protecting the first power supply circuit and the second power supply circuit, but also can avoid the phenomenon that the thermistor is damaged by large current passing through the thermistor after the surge current passes through the thermistor, and prolong the service life of the thermistor.

With continued reference to fig. 7, after the AC power AC provided by the power supply apparatus is powered on, the first power circuit 7031 is powered on and starts operating through the connection with the power supply apparatus, and the second power circuit 7032 is not powered on. After the first power circuit 7031 is started to operate, the display device 700 enters a standby mode, a Strobe (STB) pin of the controller 706 is at a first level at this time, 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 also at the first level, and thus, the power consumption of the controller 706 is minimum, the first power circuit 7031 enters a frequency hopping mode to meet the power requirement of a small load, so that the power consumption of the first power circuit 7031 is minimum, and the second power circuit 7032 is not powered on, so that the standby power of the display device 700 is minimum.

Based on the above description, after the display device 700 is turned on, the current of the first power circuit 7031 is small, and the first thermistor RT1 (not shown in fig. 7, but shown in fig. 8 as being connected in series on the live line or the neutral line of the power supply device) in the first power circuit 7031 is connected in series between the power supply device and the first power circuit 7031. Therefore, at this time, the first power supply circuit 7031 does not need to short the first thermistor RT1, and the first power supply circuit 7031 needs to supply power to the controller 706. At this time, the controller 706 outputs a first signal (i.e., a STB signal) to the STB pin of the first power circuit 7031 through the STB pin of the controller 706, and the STB pin of the first power circuit 7031 is at the second level at this time. Wherein the first level and the second level are opposite in level. For example, the first level is a low level of the STB signal and the second level is a 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 surge current generated by the first power circuit 7031 passes through the first thermistor RT1, and the function of protecting the back end component in the first power circuit 7031 is performed.

Also, the first power supply pin (denoted by numeral 31 in fig. 7) of the first power supply circuit 7031 starts to normally supply power to the controller 706 through connection with the power supply pin (denoted by numeral 11 in fig. 7) of the controller 706, so that the controller 706 can normally operate. The second power supply pin (indicated by numeral 32 in fig. 7) of the first power supply circuit 7031 starts to supply the backlight driving circuit 705 with the power of the backlight light source located in the first region of the backlight assembly 702 through the connection with the first power supply pin (indicated by numeral 21 in fig. 7) of the backlight assembly 702, so that the backlight driving circuit 705 is ready to turn on the backlight light source.

When the backlight light source of the backlight assembly 702 is ready to be turned on, since the large current in the first power supply circuit 7031 (e.g., components implementing a rectifying filter function) is fully charged before the first thermistor RT1 is short-circuited, no inrush current is generated in the first power supply circuit 7031 after the controller 706 can short-circuit the first thermistor RT1 by controlling the first power supply circuit 7031. Furthermore, the Switch (SW) pin of the controller 706 is connected to the SW pin of the first power circuit 7031 to output a second signal (i.e., SW signal) to the SW pin of the first power circuit 7031, and at this time, the first power circuit 7031 controls the first thermistor RT1 to be short-circuited between the power supply equipment and the first power circuit 7031 according to the second signal to short-circuit the first thermistor RT1 and disconnect the first thermistor RT1, thereby preventing the first thermistor RT1 from being damaged due to overheating, and protecting the first thermistor RT 1. In this way, the first thermistor RT1 not only protects the first power supply circuit 7031, but also does not itself overheat and damage it.

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

It is noted that the STB pin of the controller 706, the power pin of the controller 706, and the SW pin of the controller 706 may employ 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 employ one or more input or output ports.

In the application, after the first power circuit is started to work, because the standby power of the display device is low at the moment, the current generated in the first power circuit is low, and therefore the first thermistor does not need to be short-circuited and the first power circuit needs to supply power to the controller. Based on the connection of the first power circuit and the controller, the first power circuit may receive a first signal from the controller, so that the first power circuit may control the first thermistor to be connected in series between the power supply device and the first power circuit according to the first signal, so that the first power circuit supplies power to the controller and provides the backlight driving circuit of the backlight assembly with electric energy of the backlight light source located in the first area in the backlight assembly, respectively.

When a backlight source of a backlight assembly is ready to be turned on, since a large electrolyte in the first power supply circuit is fully charged before the first thermistor is short-circuited, a surge current is not generated in the first power supply circuit. Furthermore, the first power supply circuit can control the first thermistor to be in short circuit connection between the power supply equipment and the first power supply circuit according to the second signal output by the controller chip, so that the first thermistor is in short circuit, the first thermistor is prevented from being damaged due to overheating, and the function of protecting the first thermistor is achieved. Therefore, the first thermistor not only plays a role of protecting the first power supply circuit, but also cannot be damaged due to self overheating.

In this application, a control terminal (denoted by a letter K in fig. 7) of the power supply switching circuit 7033 may be connected to the first power circuit 7031, the controller 706, or the first power circuit 7031 and the controller 706, respectively, which is not limited in this application.

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 powered controller 706. And the power supply switching circuit 7033 may 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.

The power supply switching circuit 7033 functions as a switch, and is used to enable the first power supply circuit 7031 to supply power to the second power supply circuit 7032 or stop supplying power. The power supply switching circuit 7033 may be disposed in the first power circuit 7031, the second power circuit 7032, or both the first power circuit 7031 and the second power circuit 7032, which is not limited in this application.

In this application, the SW pin of the second power circuit 7032 may be connected to the first power circuit 7031, the controller 706, or the first power circuit 7031 and the controller 706, which is not limited in this application. Based on the above description, the second power circuit 7032 may receive the second signal from the first power circuit 7031 or the powered controller 706.

When the second power supply circuit 7032 is not energized, a second thermistor RT2 (not illustrated in fig. 7, and a second thermistor RT2 illustrated in series on the live line or the neutral line of the power supply apparatus in fig. 13) in the second power supply circuit 7032 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 the present application, the first time when the second power supply circuit 7032 is energized is recorded as a first time when the first power supply circuit 7031 starts supplying 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.

Since the second power circuit 7032 needs to be charged from zero after the second power circuit 7032 is powered on, a large current (e.g., components that perform a rectifying and filtering function) in the second power circuit 7032 needs to be charged, and thus, the second power circuit 7032 generates an inrush current. To avoid the influence of the inrush current on the back end part of the second power supply circuit 7032, the controller 706 needs to short-circuit the second thermistor RT2 of the second power supply circuit 7032 after the second power supply circuit 7032 is powered on for a preset time period.

The method and the device start from the first moment, and record the moment after the preset duration as the second moment. And at the second time, the controller 706 may switch the second thermistor RT2 from being connected in series between the power supply switching circuit 7033 and the second power supply circuit 7032 to being connected in short circuit between the power supply switching circuit 7033 and the second power supply circuit 7032 by controlling the second power supply circuit 7032 according to the second signal, so that the surge current generated in the second power supply circuit 7032 passes through the second thermistor RT2, thereby playing a role in protecting the back end part in the second power supply circuit 7032.

Thus, the power supply pin (indicated by numeral 33 in fig. 7) of the second power supply circuit 7032 starts to supply power to the backlight driving circuit 705 of the backlight source located in the second area of the backlight assembly 702 through connection with the second power supply pin (indicated by numeral 22 in fig. 7) of the backlight assembly 702, so that the backlight driving circuit 705 is ready to turn on the backlight source.

Therefore, the first power circuit 7031 and the second power circuit 7032 can both provide the electric power of the backlight assembly 702 to the backlight driving circuit 705, thereby 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 circuit 7032 and the SW pin of the second power circuit 7032 may adopt one or more input or output ports.

In the present application, when the second power supply circuit is not energized, 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 equipment to the second power supply circuit according to the first power supply circuit or the received second signal output by the controller after power supply, so that the second power supply circuit is electrified and records that the current moment is the first moment. Since the second power supply circuit needs to be charged from zero for a large electrolysis after the second power supply circuit is energized, the second power supply circuit generates a surge current.

And recording the time after the preset time length is passed as a second time from the first time. And at the second moment, the second power supply circuit can control the second thermistor to be switched from the series connection between the power supply switching circuit and the second power supply circuit to the short circuit connection between the power supply switching circuit and the second power supply circuit according to the second signal, so that the second thermistor is short-circuited, the second thermistor is prevented from being damaged due to overheating, the effect of protecting the second thermistor is achieved, and surge current generated by the second power supply circuit passes through the second thermistor to achieve the effect of protecting a rear end part in the second power supply circuit.

In some embodiments, based on the connection between the first power circuit and the backlight driving circuit and the connection between the second power circuit and the backlight driving circuit, the first power circuit may provide the backlight driving circuit with the electric energy of the backlight source located in the first region of the backlight assembly, and the second power circuit may provide the backlight driving circuit with the electric energy of the backlight source located in the second region of the backlight assembly, so that the backlight driving circuit may turn on the backlight source in the backlight assembly under the power supply of the first power circuit and the second power circuit, thereby ensuring the backlight brightness of the backlight source in the backlight assembly, ensuring the backlight effect of the display device, and improving 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 specific process of the first power circuit 7031 and the second power circuit 7032 supplying power to the display device 700 may include:

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

Step 2, after the first power circuit 7031 is started to operate, 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 connection of the STB pin of the controller 706 with the STB pin of the first power circuit 7031 causes the STB pin of the first power circuit 7031 to be at a low level of the STB signal.

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

Step 4, the first power circuit 7031 may control the first thermistor RT1 to be connected in series between the power supply device and the first power circuit 7031 according to a high level of the STB signal, so that a surge current generated by the first power circuit 7031 passes through the first thermistor RT1, so that the first power circuit 7031 may provide the controller 706 and the backlight driving circuit 705 with power of the backlight source located in the first region in the backlight assembly 702, respectively, and thus the backlight driving circuit 705 prepares to turn on the backlight source of the backlight assembly 702.

In step 5, when the backlight source of the backlight assembly 702 is ready to be turned on, since the large current in the first power supply circuit 7031 is fully charged before the first thermistor RT1 is short-circuited, no surge current is generated in the first power supply circuit 7031. Further, the controller 706 outputs the high level of the SW signal to the SW pin of the first power supply circuit 7031.

And 6, the first power circuit 7031 controls the first thermistor RT1 to be connected between the power supply equipment and the first power circuit 7031 in a short circuit mode according to the high level of the SW signal, so that the first thermistor RT1 is short-circuited, the connection of the first thermistor RT1 is disconnected, the first thermistor RT1 is prevented from being damaged due to overheating, and the function of protecting the first thermistor RT1 is achieved. In this way, the first thermistor RT1 not only protects the first power supply circuit 7031, but also does not itself overheat and damage it.

In 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.

In step 72, when the first power supply circuit 7031 receives the high level of the SW signal output by the controller 706, the first power supply circuit 7031 sends the high level of the SW signal to the power supply switching circuit 7033.

And 8, controlling the first power supply circuit 7031 to supply the voltage input by the power supply device to the second power supply circuit 7032 by the power supply switching circuit 7033 according to the high level of the SW signal, and recording the first time when the second power supply circuit 7032 is powered on as the first time.

Since the second thermistor RT2 is connected in series between the power supply switching circuit 7033 and the second power supply circuit 7032 when the second power supply circuit 7032 is not energized. Therefore, the first time is the time 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 between the power supply switching circuit 7033 and the second power circuit 7032.

And 9, recording the time after the preset time duration as a second time from the first time.

In step 10, after the second power circuit 7032 is powered on, the second power circuit 7032 may generate an inrush current due to the fact that large electrolysis in the second power circuit 7032 needs to be charged from zero. Therefore, at the second time, the second power circuit 7032 may control the second thermistor RT2 to switch from being connected in series between the power switching circuit 7033 and the second power circuit 7032 to being connected in short circuit between the power switching circuit 7033 and the second power circuit 7032 according to the high level of the SW signal, so that the surge current generated by the second power circuit 7032 passes through the second thermistor RT2, which plays a role in protecting the back end part of the second power circuit 7032, and also enables the second power circuit 7032 to supply the backlight driving circuit 705 with the power of the backlight source located in the second area of the backlight assembly 702.

The high level of the SW signal may be directly output to the second power circuit 7032 without delay by the controller 706 or the first power circuit 7031, or may be directly output to the second power circuit 7032 after a preset time period elapses by the controller 706 or the first power circuit 7031.

In step 11, the backlight driving circuit 705 may turn on the backlight source of the backlight assembly 702 based on the power supplied by the first power circuit 7031 and the second power circuit 7032.

In the application, through the above-mentioned sequential control to first power supply circuit and second power supply circuit, display device's stand-by power consumption has not only been saved, still solved because surge current's production and lead to thermistor overheated and take place the problem of damaging, the life-span of thermistor has been prolonged, make thermistor play the effect of protecting first power supply circuit and second power supply circuit, thereby, the process that first power supply circuit and second power supply circuit provide the dual supply to backlight assembly has been realized, display device's picture quality has been ensured, display device's effect of being shaded is ensured.

On the basis of the embodiment shown in fig. 7, the present application may divide the first power supply circuit 7031 into a plurality of portions. 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 resistor switching circuit 70311 is connected to the STB pin/SW pin of the controller 706, the first resistor 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 further 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, the first output terminal of the first voltage conversion circuit 70312 is connected to the power supply pin (i.e., numeral 11 in fig. 7) of the controller 706, 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 may receive a first signal from the controller 706. And the first resistance switching circuit 70311 may 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 can also receive a second signal from the powered controller 706. And the first resistance switching circuit 70311 may 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 may convert the voltage input by the power supply device and supply the converted voltage to the controller 706 and the backlight driving circuit 705 respectively, so that the controller 706 and the backlight driving circuit 705 are powered on, and the backlight driving circuit 705 drives the backlight light source located in the first region in the backlight assembly 702 to implement the subsequent operation.

The first resistance switching circuit 70311 and the first voltage conversion circuit 70312 may be integrated chips or circuits formed by a plurality of components, which is not limited in this application.

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

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

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 rectifying-filtering circuit 70312b, a first PFC circuit 70312c, and a first LLC circuit 70312 d.

The input end of the first electromagnetic interference circuit 70312a is connected to the output end of the first resistance switching circuit 70311 and the second end of the first thermistor RT1, the output end of the first electromagnetic interference circuit 70312a is connected to the input end of the first rectifying and filtering circuit 70312b, the output end of the first rectifying and filtering circuit 70312b is connected to the input end of the first PFC circuit 70312c, the output end of the first PFC circuit 70312c is connected to the input end of the first LLC circuit 70312d, and the output end of the first LLC circuit 70312d is connected to the controller 706 and the backlight driving circuit 705.

Generally, a large capacitor is usually provided in the first rectifying and smoothing circuit 70312 b. The specific structures of the first rectifying and filtering circuit 70312b, the first PFC circuit 70312c, and the first LLC circuit 70312d may refer to the description of the embodiment in fig. 4, which is not described herein again.

The implementation 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 a plurality of 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.

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

In the present application, the fuse F is a fuse on the line of the power supply apparatus middle fire (L). When the display apparatus 700 enters the standby mode, the second signal is at a third level for instructing the second terminal and the third terminal of the first relay K to be turned off, such as a low level of the SW signal, so that the L line is cut off and the second power circuit 7032 is not supplied with power. When the standby power of the display device is consumed, the controller 706 or the first power circuit 7031 transmits a second signal to the power supply switching circuit 7033, the second signal being at a fourth level indicating that the second terminal and the third terminal of the first relay K are connected so that the L line is turned on and the second power circuit 7032 is supplied with power.

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

In this application, the second power circuit 7032 may employ various ways to short the second thermistor RT2 to prevent the surge current generated by the second power circuit 7032 from affecting the back end of the second power circuit 7032.

Next, based on the embodiments shown in fig. 7 to fig. 11, a detailed description will be given of a specific implementation process of the second power circuit 7032 for short-circuiting the second thermistor RT2, respectively, with reference to fig. 12 to fig. 20.

In some embodiments: as shown in fig. 12, in the present embodiment, a power supply switching circuit 7033 is provided in the second power supply circuit 7032. Because the first power circuit 7031 or the powered controller 706 outputs the second signal to the power switching circuit 7033 and the second power circuit 7032, and the power switching circuit 7033 is disposed in the second power circuit 7032, the power switching circuit 7033 and the second power circuit 7032 may use one pin and receive the second signal at the same time, that is, the control terminal of the power switching circuit 7033 is connected to the SW pin of the second power circuit 7032, thereby reducing the number of input or output ports and reducing the complexity of signal transmission.

In this application, when the power supply switching circuit 7033 and the second power supply circuit 7032 receive the second signal 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, so that the second power supply circuit 7032 is powered on.

After the second power circuit 7032 is powered on, the second power circuit 7032 may control the second thermistor RT2 to be connected in series between the power switching circuit 7033 and the second power circuit 7032 according to the second signal, and delay for a preset time period. After the preset time period, the second power 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 connected in short circuit between the power supply switching circuit 7033 and the second power 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 a plurality of portions. 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 converting circuit 70322 a.

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

Based on the above connection relationship, the second resistance switching circuit 70321a may receive a 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 supplying power to the second power supply circuit 7032 through the power supply switching circuit 7033. Accordingly, the second resistance switching circuit 70321a may 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 delayed by a preset time period.

After the preset time period, the second resistance switching circuit 70321a may 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 connected in short circuit between the power supply switching circuit 7033 and the second voltage conversion circuit 70322a, so that the second thermistor RT2 is short-circuited.

In this application, the second voltage conversion circuit 70322a may convert the voltage output from the first power circuit 7031 and supply the converted voltage to the backlight driving circuit 705, so that the backlight driving circuit 705 drives the backlight light source located in the second region in the backlight assembly 702, thereby realizing a clear display image of the display device 700.

The second resistance switching circuit 70321a and the second voltage converting circuit 70322a may be integrated chips or circuits formed by a plurality of components, which is not limited in this application.

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

A first end of the first resistor R1 and a fourth end of the second relay K2 are both connected to the SW pin of the controller 706 or the first power circuit 7031, a second end of the first resistor R1 is respectively connected to a first end of the second capacitor C2 and a negative electrode of the voltage regulator VZ1, a positive electrode of the voltage regulator VZ1 is respectively connected to a first end of the second resistor R2 and a base of the first triode V1, a collector of the first triode V1 is respectively connected to an anode of the second diode VD2 and a first end of the second relay K2, a cathode of the second diode VD2 is connected to a fourth end of the second relay K2, a second end of the second relay K2 is connected to a first end of the second thermistor RT2, a third end of the second relay K2 is connected to a second end of the second thermistor RT2, and a second end of the second capacitor C2, a second end of the second resistor R2 and an emitter of the first triode V1 are all grounded.

In this application, the first transistor V1 is an N-type transistor. When the controller 706 or the first power circuit 7031 outputs a second signal to the second resistor 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 regulated voltage value of the regulator VZ1, the regulator VZ1 is turned on, the first triode V1 is turned on, and the second thermistor RT2 is short-circuited by the second relay K2.

The resistance value of the first resistor R1, the values of the second capacitor C2 and the capacitor, and the voltage stabilizing value of the voltage regulator VZ1 may determine the time point of turning off and on the second relay K2, that is, a preset time duration, so as to ensure that after the second power circuit 7032 is powered on, the surge current on the L line passes through the second thermistor RT2 after the preset time duration, thereby achieving the effect of protecting the rear end circuit.

Here, the implementation of the second resistance switching circuit 70321a is not limited to the above-described 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 rectifier filter circuit 70322ab, a second PFC circuit 70322ac, and a second LLC circuit 70322 ad.

An input end of the second electromagnetic interference circuit 70322aa is connected to an output end of the second resistor switching circuit 70321a and a second end of the second thermistor RT2, an output end of the second electromagnetic interference circuit 70322aa is connected to an input end of the second rectifying and filtering circuit 70322ab, an output end of the second rectifying and filtering circuit 70322ab is connected to an input end of the second PFC circuit 70322ac, an output end of the second PFC circuit 70322ac is connected to an input end of the second LLC circuit 70322ad, and an output end of the second LLC circuit 70322ad is connected to the backlight driving circuit 705.

Generally, the large capacitor is provided in the second rectifying-smoothing circuit 70322 ab. For specific structures of the second rectifying and filtering circuit 70322ab, the second PFC circuit 70322ac, and the second LLC circuit 70322ad, reference may be made to the description of the embodiment in fig. 4, which is not described herein again.

Here, the implementation of the second voltage conversion circuit 70322a is not limited to the above-described specific structure.

In some embodiments: as shown in fig. 16, in the present embodiment, the power supply switching circuit 7033 is provided in the second power supply circuit 7032, as in the above-described embodiment. Unlike the above embodiments, in this embodiment, the first power circuit 7031 or the controller 706 after supplying power does not output the second signal to the power supply switching circuit 7033 and the second power circuit 7032 at the same time, but the first power circuit 7031 or the controller 706 after supplying power outputs the second signal to the power supply switching circuit 7033 first. After a preset time period, the first power circuit 7031 or the powered controller 706 outputs a second signal to the second power 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 supply circuit 7032 receives the second signal, and the time interval is a preset time length.

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 circuit 7032, the SW pins of the controller 706 have two (shown as SW1 and SW2 in fig. 16), one of the SW pins (shown as SW1 in fig. 16) is connected to the SW pin (shown as SW1 and SW2 in fig. 16) of the first power circuit 7031, and the other SW pin (shown as SW2 in fig. 16) is connected to the SW pin of the second power circuit 7032, so that the controller 706 can output the second signal to the first power circuit 7031 and the second power circuit 7032 in a time-sharing manner. When the first power circuit 7031 outputs the second signal to the second power circuit 7032, two SW pins of the first power circuit 7031 are provided, one SW pin (shown as SW1 in fig. 16) is connected to the SW pin of the controller 706, and the other SW pin (shown as SW2 in fig. 16) is connected to the SW pin of the second power circuit 7032, so that the first power circuit 7031 receives the second signal from the SW pin of the controller 706, and after a preset time period, the second signal can be output to the SW pin of the second power circuit 7032.

In this application, when the power switching circuit 7033 receives the second signal, the first power circuit 7031 supplies power to the second power circuit 7032 through the power switching circuit 7033, so that the second power circuit 7032 is powered on.

After the second power supply circuit 7032 is powered on, the second power supply circuit 7032 may 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 the preset time period, the second power circuit 7032 receives the second signal, and at this time, the second power circuit 7032 may control the second thermistor RT2 to be switched from being connected in series between the power supply switching circuit 7033 and the second power circuit 7032 to being connected in short circuit between the power supply switching circuit 7033 and the second power circuit 7032 according to the second signal, 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 a plurality of portions. 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 converting circuit 70322 b.

A control terminal of the third resistor switching circuit 70321b is connected to the first power circuit 7031 or the SW pin of the controller 706), the third resistor switching circuit 70321b is connected in parallel between the first terminal and the second terminal of the second thermistor RT2, the first terminal of the second thermistor RT2 is further connected to an output terminal of the power supply switching circuit 7033, the second terminal of the second thermistor RT2 is further connected to an input terminal of the third voltage converting circuit 70322b, and an output terminal of the third voltage converting 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 supplying power to the second power supply circuit 7032 through the power supply switching circuit 7033. Thus, the third resistance switching circuit 70321b may control the second thermistor RT2 to be connected in series between the power supply switching circuit 7033 and the third voltage conversion circuit 70322 b.

After the predetermined period of time, the third resistance switching circuit 70321b may receive a second signal from the first power circuit 7031 or the powered controller 706. Thus, the third resistance switching circuit 70321b may control the second thermistor RT2 to switch from being connected in series between the power supply switching circuit 7033 and the third voltage conversion circuit 70322b to being connected in short circuit between the power supply switching circuit 7033 and the third voltage conversion circuit 70322b in accordance with the second signal, so that the second thermistor RT2 is short-circuited.

Thus, the third voltage conversion circuit 70322b can convert the voltage output from the first power supply circuit 7031 and supply the converted voltage to the backlight driving circuit 705, so that the backlight driving circuit 705 drives the backlight light source located in the second region in the backlight assembly 702, thereby realizing a clear display screen of the display device 700.

The third resistance switching circuit 70321b and the third voltage converting circuit 70322b may be integrated chips or circuits composed of a plurality of 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 triode V1' and the fourth end of the fourth relay K2 'are all connected to the controller 706 or the first power circuit 7031, the collector of the third triode V1' is connected to the anode of the fourth diode VD2 'and the first end of the fourth relay K2', the cathode of the fourth diode VD2 'is connected to the fourth end of the fourth relay K2', the second end of the fourth relay K2 'is connected to the first end of the second thermistor RT2, the third end of the fourth relay K2' is connected to the second end of the second thermistor RT2, and the second end of the second capacitor C2 ', the second end of the sixth resistor R2 and the emitter of the third triode V1' are all grounded.

Here, the third resistance switching circuit 70321b is not limited to the above-described specific structure.

The specific structure of the third voltage converting circuit 70322b can be described in the structure of the second voltage converting circuit 70322a in the embodiment shown in fig. 15 in the foregoing embodiment, and is not described herein again.

In some embodiments:

as shown in fig. 19, unlike the foregoing embodiments, in the present embodiment, a power supply switching circuit 7033 is provided in a first power supply circuit 7031. Thus, the power switching circuit 7033 and the second power circuit 7032 receive the second signal from the first power circuit 7031 or the powered controller 706 through different pins. 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. As in the previous embodiments, in the present embodiment, the power supply switching circuit 7033 and the second power supply circuit 7032 receive the second signal at the same time, thereby reducing the complexity of signal transmission.

The specific structure of the second power circuit 7032 can be described in the above embodiment with reference to the structure of the second power circuit 7032, which is not described herein again.

In some embodiments:

as shown in fig. 20, in the present embodiment, the power supply switching circuit 7033 is provided in the first power supply circuit 7031, as in the previous embodiment. Unlike the previous embodiments, in this embodiment, the first power circuit 7031 or the powered controller 706 does not output the second signal to the power switching circuit 7033 and the second power circuit 7032 at the same time, but the first power circuit 7031 or the powered controller 706 outputs the second signal to the power switching circuit 7033 first. After a preset time period, the first power circuit 7031 or the powered controller 706 outputs a second signal to the second power 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 supply circuit 7032 receives the second signal, and the time interval is a preset time length.

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 circuit 7032, the SW pins of the controller 706 have two (shown as SW1 and SW2 in fig. 20), wherein one SW pin (shown as SW1 in fig. 20) 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 that the controller 706 outputs the second signal to the first power circuit 7031 and the second power circuit 7032 in a time-sharing manner. When the first power circuit 7031 outputs the second signal to the second power circuit 7032, the SW pins of the first power circuit 7031 have two SW pins (shown as SW1 and SW2 in fig. 20), one SW pin (shown as SW1 in fig. 20) 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 circuit 7032, so that the first power circuit 7031 receives the second signal from the SW pin of the controller 706, and the second signal can be output to the SW pin of the second power circuit 7032 after a preset time period.

It should be noted that, in addition to the above embodiments, the power supply switching circuit 7033 may be disposed in the first power circuit 7031 and the second power circuit 7032, and the specific implementation process of the second power circuit 7032 for short-circuiting the second thermistor RT2 may refer to what is shown in the above four embodiments, which is not described herein again.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display device is characterized in that a display panel is provided,

a display screen configured to present image content;

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

the controller is configured to control the first power supply circuit to supply power to the second power supply circuit when receiving a starting-up instruction;

the first power supply circuit includes: a first resistance switching circuit and a first voltage conversion circuit;

2. The display device according to claim 1, further comprising: a power supply switching circuit; the power supply switching circuit is connected between the input end of the first power supply circuit and the input end of the second power supply circuit, and the input end of the first power supply circuit is connected with power supply equipment;

3. The display device according to claim 2,

the controller is further configured to control the second power circuit to provide the backlight driving circuit with electric energy of the backlight light source located in the second area in the backlight assembly by switching a second thermistor in the second power circuit from being connected in series between the power supply switching circuit and the second power circuit to being connected in short circuit between the power supply switching circuit and the second power circuit after a preset time period.

4. The display device according to claim 3,

the controller is further configured to control the first power supply circuit to supply the voltage input by the power supply device to the second power supply circuit by connecting a second thermistor in the second power supply circuit in series between the power supply switching circuit and the second power supply circuit.

5. The display device according to claim 2,

the controller is configured to control the first power supply circuit to supply the voltage input by the power supply device to the controller and to supply the backlight driving circuit with power of the backlight light source located in the first area in the backlight assembly by connecting the first thermistor in the first power supply circuit in series between the power supply device and the first power supply circuit.

6. The display device according to claim 5,

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 connected in short circuit between the power supply device and the first power supply circuit.

7. The display device according to claim 1,

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

8. The display device according to claim 1,

the second power supply circuit is configured to, when the second signal output by the first power supply circuit or the controller after power supply is received and the first power supply circuit starts to supply power to the second power supply circuit through a power supply switching circuit, control a second thermistor in the second power supply circuit to be connected in series between the power supply switching circuit and the second power supply circuit based on the second signal and delay for a preset time; after the preset duration, controlling the second thermistor to be in short-circuit connection between the power supply switching circuit and the second power supply circuit;

alternatively, the first and second electrodes may be,

9. The display device according to claim 8, wherein the second power supply circuit comprises: a second resistance switching circuit and a second voltage conversion circuit;

10. The display device according to claim 9,

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

11. The display device according to claim 8, wherein the second power supply circuit comprises: a third resistance switching circuit and a third voltage conversion circuit;

12. The display device according to claim 11,

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

13. A display device as claimed in any one of claims 1-12, characterized in that a supply switching circuit is provided in the first power supply circuit and/or in that the supply switching circuit is provided in the second power supply circuit.

14. The display device according to claim 13, wherein the power supply switching circuit comprises: the fourth capacitor, the first diode, the first relay and the fuse;