Display device

Abstract

The embodiment of the invention belongs to the display technology, and provides display equipment which comprises a power board and a logic board. The logic board is connected with the power board; the power panel is configured to receive commercial power, convert the commercial power into first voltage and output the first voltage; the logic board is configured to receive the first voltage and output a first driving voltage to a driving board based on the first voltage, and the driving board is configured to drive a panel to display an image; the first voltage is the voltage required when the driving board drives the panel to display the image. The cost of the power supply framework in the display equipment can be reduced while the power supply effect of the power supply framework in the display equipment is guaranteed.

Description

Technical Field

[0001] Embodiments of the present application relate to display technology, and more particularly to a display device. Background Art

[0002] The power supply architecture in LCD display devices primarily consists of a power board, motherboard, logic board (TCON board), backlight board, audio amplifier unit, and panel. The power board receives AC power, converts it to DC, and then outputs 12V to the motherboard. The motherboard then outputs 12V to the TCON board and amplifier circuit. The TCON board uses a boost circuit (such as a BOOST circuit) to raise the 12V voltage to the 14V to 19V required by the panel. A boost circuit is also located between the amplifier circuit and the power board.

[0003] The current power supply architecture is based on a traditional +12V supply, and all components, interfaces, and modules are also powered by +12V. However, the required voltage for the panel is greater than 12V. In other words, the 12V voltage is only an intermediate voltage, not the final required voltage. The aforementioned boost and buck circuits increase the cost of the power supply architecture.

[0004] Therefore, how to ensure the power supply effect of the power supply architecture in the display device while reducing the cost of the power supply architecture in the display device still needs to be considered. Summary of the Invention

[0005] An embodiment of the present application provides a display device that can solve the problem of how to ensure the power supply effect of the power supply architecture in the display device while reducing the cost of the power supply architecture in the display device.

[0006] In a first aspect, an embodiment of the present application provides a display device, the display device comprising: a power board, a logic board;

[0007] The logic board is connected to the power board;

[0008] The power board is configured to receive mains power and convert the mains power into a first voltage before outputting it;

[0009] The logic board is configured to receive the first voltage and output a first driving voltage to a driving board based on the first voltage, wherein the driving board is configured to drive the panel to display an image;

[0010] The first voltage is a voltage required by the driving board to drive the panel to display an image.

[0011] An embodiment of the present application provides a display device that reduces the cost of the power supply architecture in the display device while ensuring the power supply effect of the power supply architecture in the display device. Specifically, the display device includes a power board and a logic board. The logic board is connected to the power board. The power board is configured to receive AC power and convert the AC power into a first voltage before outputting it. The logic board is configured to receive the first voltage and output a first driving voltage to the driving board based on the first voltage, and the driving board is configured to drive the panel to display an image. The first voltage is the voltage required for the driving board to drive the panel to display an image.

[0012] The first voltage is the voltage required by the driver board to drive the panel to display images. In other words, the logic board does not need to use a boost circuit to boost the voltage output by the mainboard. Instead, it receives the first voltage directly from the power board and, based on this first voltage and the driver board, drives the panel to display images. This eliminates the boost circuit in the mainboard, changing the traditional architecture where the mainboard and logic board are connected to provide power and boost the voltage. This reduces the cost of the power supply architecture while ensuring the power supply efficiency of the architecture.

[0013] In some embodiments, the first voltage is greater than or equal to 14V and less than or equal to 19V.

[0014] In some embodiments, the logic board includes: a first control circuit, a second control circuit, a third control circuit, and a fourth control circuit;

[0015] One end of the first control circuit, the second control circuit, the third control circuit, and the fourth control circuit is connected to the power board; the other ends of the first control circuit and the second control circuit are connected to the source driver of the driving board; the other ends of the third control circuit and the fourth control circuit are connected to the gate driver of the driving board;

[0016] The first control circuit is configured to receive the first voltage and output the first voltage to the source driver of the driving board; the second control circuit is configured to receive the first voltage and output a second voltage to the source driver after stepping down the voltage;

[0017] The third control circuit is configured to receive the first voltage and output a third voltage to the gate driver of the driving board after boosting the voltage; the fourth control circuit is configured to receive the first voltage and output a fourth voltage to the gate driver after bucking the voltage.

[0018] In some embodiments, the first control circuit includes: a first control element and a field effect transistor;

[0019] The input of the first control element is connected to the power board,

[0020] The gate of the field effect transistor is connected to the first control element, the drain is connected to the power board, and the source is connected to the source driver;

[0021] The first control element is configured to output a timing voltage according to the first voltage and a preset timing to control the on and off of the field effect tube. When the field effect tube is turned on, the first voltage is output to the source driver.

[0022] In some embodiments, the second control circuit includes: a second control element and a first inductor;

[0023] The input of the second control element is connected to the power board, one end of the first inductor is connected to the second control element, and the other end is connected to the source driver;

[0024] The second control element is configured to receive the first voltage and step down the voltage to obtain the second voltage, and output the second voltage to the source driver through the first inductor.

[0025] In some embodiments, the third control circuit includes: a third control element, a second inductor;

[0026] The input of the third control element is connected to the power board, one end of the second inductor is connected to the power board, and the other end is connected to the gate driver;

[0027] The third control element is configured to receive the first voltage and output a boosted voltage;

[0028] The third voltage includes a voltage output by the second inductor and a voltage output by the third control element.

[0029] In some embodiments, the fourth control circuit includes: a fourth control element, a third inductor, and a diode;

[0030] The input of the fourth control element is connected to the power board, one end of the third inductor is connected to the fourth control element, and the other end is grounded;

[0031] The cathode of the diode is connected to one end of the third inductor and the output of the fourth control element, and the anode is connected to the gate driver;

[0032] The fourth control element is configured to receive the first voltage, step down the voltage, and output the fourth voltage, and output the fourth voltage to the gate driver through the anode of the diode.

[0033] In some embodiments, the display device further comprises: a step-down circuit;

[0034] The step-down circuit is connected to the power board;

[0035] The step-down circuit is configured to receive the first voltage and operate based on the first voltage, and is further configured to step down the first voltage and output a second driving voltage to the driving board.

[0036] Compared with the traditional solution, this embodiment places the step-down circuit part corresponding to the 3.3V voltage and the 1.8V voltage on the mainboard end, and obtains the 3.3V voltage and the 1.8V voltage based on the step-down circuit conversion. The logic board 200 directly reuses the 3.3V voltage and the 1.8V voltage output on the mainboard, thereby reducing the cost of the display device.

[0037] In some embodiments, the buck circuit includes: a main buck circuit, a plurality of secondary buck circuits, and a plurality of voltage regulator combinations;

[0038] The main step-down circuit is connected to the power board, each of the secondary step-down circuits is connected to the main step-down circuit, and each of the voltage regulator combinations is connected to the main step-down circuit or one of the secondary step-down circuits;

[0039] The main step-down circuit is configured to receive the first voltage and output a fifth voltage after stepping down the voltage, and each of the secondary step-down circuits is configured to receive the fifth voltage and output a sixth voltage after stepping down the voltage;

[0040] The sixth voltages output by different secondary buck circuits are different, and the sixth voltage output by the secondary buck circuit connected to the voltage regulator combination is the largest;

[0041] The voltage regulator combination is configured to receive the sixth voltage and output a seventh voltage, and the seventh voltage output by different voltage regulator combinations is different;

[0042] The second driving voltage includes the sixth voltage and the seventh voltage.

[0043] In the step-down circuit provided by this embodiment, only one main step-down circuit receives a high voltage input (the first voltage, for example, 15V), and the secondary step-down circuit receives the fifth voltage (for example, 5V), which is a low voltage. Compared to the circuit structure in the traditional solution where each step-down circuit receives a high voltage input, the step-down circuit provided by this embodiment can reduce the cost of the step-down circuit, thereby reducing the cost of the power supply architecture of the entire display device. In addition, when the display device is in standby mode, the secondary step-down circuit provided by this embodiment has fewer step-down structures, which can further reduce the power consumption of the step-down circuit in standby mode, thereby further reducing the power consumption of the power supply architecture of the display device.

[0044] In some embodiments, the invention further includes: the driving board and the panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the implementation methods in the embodiments of the present application or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technology descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0046] Figure 1 is a schematic diagram of an operation scenario between a display device and a control device according to an embodiment;

[0047] Figure 2 exemplarily shows a block diagram of a configuration of the control device 20 according to an exemplary embodiment;

[0048] Figure 3 A schematic diagram showing the structure of a display device in an example;

[0049] Figure 4 A schematic diagram of an existing power supply architecture in a liquid crystal display device provided in this application;

[0050] Figure 5 A schematic diagram of a display device 10 provided in accordance with an embodiment of the present application;

[0051] Figure 6 A schematic structural diagram of a logic board 200 in a display device 10 provided in one embodiment of the present application;

[0052] Figure 7 A schematic structural diagram of a logic board 200 in a display device 10 provided in another embodiment of the present application;

[0053] Figure 8 A schematic structural diagram of a display device 10 provided in yet another embodiment of the present application;

[0054] Figure 9 A schematic structural diagram of a step-down circuit 310 in a display device 10 provided in another embodiment of the present application;

[0055] Figure 10 A schematic structural diagram of a step-down circuit 310 in a display device 10 provided in yet another embodiment of the present application;

[0056] Figure 11 A schematic structural diagram of a step-down circuit 310 in a display device 10 provided in another embodiment of the present application;

[0057] Figure 12 A schematic structural diagram of a display device 10 provided in yet another embodiment of the present application;

[0058] Figure 13This is a schematic structural diagram of a display device 10 provided in another embodiment of the present application. DETAILED DESCRIPTION

[0059] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0060] It should be noted that the brief descriptions of terms in this application are only for the purpose of facilitating the understanding of the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their ordinary and usual meanings.

[0061] In addition, the terms "comprises" and "comprising" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0062] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0063] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0064] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0065] The display device provided in the embodiments of the present application may have various implementation forms, for example, it may be a smart TV, a laser projection device, a monitor, an electronic bulletin board, an electronic table, etc. Figure 1 and Figure 2 This is a specific implementation of the display device of the present application.

[0066] Figure 1 Schematic diagram of an operation scenario between a display device and a control device according to an embodiment. Figure 1 As shown, the user can operate the display device 10 through the smart device 30 or the control device 20 .

[0067] In some embodiments, the control device 20 may be a remote controller. Communication between the remote controller and the display device may include infrared protocol communication, Bluetooth protocol communication, or other short-range communication methods, and the display device 10 may be controlled wirelessly or wired. The user may control the display device 10 by inputting user commands through buttons on the remote controller, voice input, control panel input, and the like.

[0068] In some embodiments, a smart device 30 (such as a mobile terminal, tablet computer, computer, laptop computer, etc.) may also be used to control the display device 10. For example, the display device 10 may be controlled using an application running on the smart device.

[0069] In some embodiments, the display device may not use the aforementioned smart device or control device to receive instructions, but may receive user control through touch or gestures.

[0070] In some embodiments, the display device 10 can also be controlled in ways other than the control device 20 and the smart device 30. For example, the display device 10 can directly receive the user's voice command control through a module for obtaining voice commands configured inside the display device 10, or it can receive the user's voice command control through a voice control device set outside the display device 10.

[0071] In some embodiments, the display device 10 also communicates data with the server 40. The display device 10 may be connected to a local area network (LAN), a wireless local area network (WLAN), or other networks. The server 40 may provide various content and interactions to the display device 10. The server 40 may be a single cluster or multiple clusters, and may include one or more types of servers.

[0072] Figure 2 FIG. 1 exemplarily shows a block diagram of a configuration of the control device 20 according to an exemplary embodiment. Figure 2As shown, the control device 20 includes a controller 21, a communication interface 22, a user input / output interface 23, a memory 25, and a power supply 24. The control device 20 can receive user input operation instructions and convert the operation instructions into instructions that the display device 10 can recognize and respond to, acting as an interactive intermediary between the user and the display device 10.

[0073] Figure 3 A schematic diagram of the structure of a display device in an example is shown in FIG. Figure 3 The display device 10 includes at least one of a tuner 11 , a communicator 12 , a detector 13 , an external device interface 14 , a controller 15 , a display 16 , an audio output interface 17 , a memory 25 , a power supply 24 , and a user interface 18 .

[0074] In some embodiments, the controller includes a processor, a video processor, an audio processor, a graphics processor, RAM, ROM, and first to nth interfaces configured as input / output.

[0075] The display 16 includes a display screen component configured to present a picture, and a driving component that drives the image display. It is configured to receive an image signal output from the controller and display video content, image content, and a menu control interface component and a user control UI interface.

[0076] The display 16 may be a liquid crystal display, an OLED display, or a projection display, and may also be a projection device and a projection screen.

[0077] The communicator 12 is a component configured to communicate with an external device or server using various communication protocols. For example, the communicator may include at least one of a Wi-Fi module, a Bluetooth module, a wired Ethernet module, or other network communication protocol chip or a near-field communication protocol chip, as well as an infrared receiver. The display device 10 can use the communicator 12 to send and receive control signals and data signals with the external control device 100 or the server 40.

[0078] The user interface 18 may be configured to receive a control signal from a control device 20 (eg, an infrared remote controller, etc.).

[0079] Detector 13 is configured to collect signals from the external environment or external interactions. For example, detector 13 may include a light receiver configured as a sensor to collect ambient light intensity; or detector 13 may include an image collector, such as a camera, configured to collect external environmental scenes, user attributes, or user interaction gestures; or detector 13 may include a sound collector, such as a microphone, configured to receive external sounds.

[0080] The external device interface 14 may include, but is not limited to, any one or more of the following: a high-definition multimedia interface (HDMI), an analog or digital high-definition component input interface (component), a composite video input interface (CVBS), a USB input interface (USB), an RGB port, etc. It may also be a composite input / output interface formed by multiple of the above interfaces.

[0081] The tuner-demodulator 11 receives broadcast television signals via a wired or wireless reception mode, and demodulates audio and video signals, such as EPG data signals, from a plurality of wireless or wired broadcast television signals.

[0082] In some embodiments, the controller 15 and the tuner 11 may be located in different separate devices, that is, the tuner 11 may also be located in an external device of the main device where the controller 15 is located, such as an external set-top box.

[0083] Controller 15 controls the operation of the display device and responds to user operations through various software control programs stored in memory 25. Controller 15 controls the overall operation of display device 10. For example, in response to receiving a user command configured to select a UI object to be displayed on display 16, controller 15 may perform operations related to the object selected by the user command.

[0084] In some embodiments, the controller includes a central processing unit (CPU), a video processor, an audio processor, a graphics processing unit (GPU), a RAM (Random Access Memory), a backlight controller (Bcon for short), a ROM (Read-Only Memory, ROM), and at least one of a first interface to an nth interface configured as input / output, a communication bus (Bus), etc.

[0085] The user may input a user command through a graphical user interface (GUI) displayed on the display 16, and the user input interface receives the user input command through the graphical user interface (GUI). Alternatively, the user may input a user command through a specific voice or gesture, and the user input interface may recognize the voice or gesture through a sensor to receive the user input command.

[0086] A user interface is the medium for interaction and information exchange between an application or operating system and the user. It converts information between its internal form and a user-friendly format. A common user interface is the graphical user interface (GUI), which refers to a graphical user interface related to computer operations. It can be an icon, window, control, or other interface element displayed on an electronic device's display. Controls can include visual interface elements such as icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, and widgets.

[0087] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0088] See Figure 4 The power supply architecture in LCD display devices mainly includes a power board, a main board, a logic board (TCON board), a backlight board, a sound amplifier unit, and a panel. Among them, the power board receives AC power and converts it into DC power, then outputs a 12V voltage to the main board. The main board outputs a 12V voltage to the TCON board, and the TCON board uses a boost circuit (such as a BOOST boost circuit) to boost the 12V voltage to the 14V to 19V required by the panel. The current power supply architecture is based on the traditional +12V power supply, and various devices, interfaces, and modules are also based on +12V power supply. The voltage required by the panel is greater than 12V. In other words, the 12V voltage is only an intermediate link voltage and not the final required voltage. The above-mentioned boost circuit and buck circuit settings increase the cost of the power supply architecture.

[0089] Based on this, the present application provides a display device that reduces the cost of the power supply architecture in the display device while ensuring the power supply effect of the power supply architecture in the display device. Specifically, the display device includes a power board and a logic board. The logic board is connected to the power board. The power board is configured to receive AC power and convert the AC power into a first voltage before outputting it. The logic board is configured to receive the first voltage and output a first driving voltage to the driving board based on the first voltage, and the driving board is configured to drive the panel to display an image. The first voltage is the voltage required for the driving board to drive the panel to display an image.

[0090] This first voltage is the voltage required by the driver board to drive the panel to display images. In other words, the logic board does not need to use a boost circuit to boost the voltage output by the mainboard. Instead, it receives the first voltage directly from the power board and, based on this first voltage and the driver board, drives the panel to display images. This eliminates the boost circuit in the mainboard, changing the traditional architecture where the mainboard and logic board are connected to provide power and boost the voltage, reducing the cost of the power supply architecture while ensuring the power supply efficiency of the architecture.

[0091] See Figure 5 The embodiment of the present application provides a display device 10, which includes a power board 100 and a logic board 200. The logic board 200 is connected to the power board 100.

[0092] The power board 100 is configured to receive AC power and convert the AC power into a first voltage (VDDA as shown in the figure) and then output it. The first voltage is the voltage required by the driver board 400 to drive the panel 500 to display an image. The first voltage is greater than 12V, and the range of the first voltage can be greater than or equal to 14V, and less than or equal to 19V. The first voltage is, for example, 15V. Unlike the traditional solution in which the power board 100 outputs a 12V voltage, the main board boosts the 12V voltage and then outputs the voltage to the logic board 200, and the logic board 200 then outputs the voltage to the driver board 400, the power board 100 directly outputs the voltage required by the panel 500, saving a boost circuit and reducing the cost of the power supply mechanism of the display device 10.

[0093] In some examples, the power board 100 includes an inductor coil. By changing the number of turns of the inductor coil, the power board 100 can convert the AC power into the first voltage.

[0094] The logic board 200 is configured to receive the first voltage and output a first driving voltage to the driving board 400 based on the first voltage. The driving board 400 is configured to drive the panel 500 to display an image. The driving board 400 includes a source driver 410 and a gate driver 420. The gate driver 420 and the source driver 410 are signal-connected to the panel 500. The first driving voltage includes a voltage output to the gate driver 420 and a voltage output to the source driver 410. The logic board 200 is a TCON (timing controller) board. The logic board 200 is configured to adjust the first voltage and output the first driving voltage to the driving board 400 according to a timing sequence.

[0095] It should be noted that since the logic board 200 receives the first voltage (14V-19V), which is higher, the logic board 200 remains powered when the display device 10 is in standby mode, resulting in a higher standby power consumption. In this case, the display device 10 eliminates the boost circuit on the motherboard, reducing the standby power consumption of the entire display device 10. Furthermore, when the display device 10 is in standby mode, the quiescent current is controlled to less than 20uA, further reducing the standby power consumption of the entire display device 10.

[0096] In summary, this embodiment provides a display device 10, which reduces the cost of the power supply architecture in the display device while ensuring the power supply effect of the power supply architecture in the display device. Specifically, the display device 10 includes a power board 100 and a logic board 200. The logic board 200 is connected to the power board 100. The power board 100 is configured to receive AC power and convert the AC power into a first voltage and then output it. The logic board 200 is configured to receive the first voltage and output a first driving voltage to the driving board 400 based on the first voltage, and the driving board 400 is configured to drive the panel 500 to display an image. The first voltage is the voltage required for the driving board 400 to drive the panel 500 to display an image.

[0097] This first voltage is the voltage required by the driver board 400 to drive the panel 500 to display an image. In other words, the logic board 200 does not need to use a boost circuit to boost the voltage output by the mainboard. Instead, it receives the first voltage directly from the power board 100 and, based on this first voltage and the driver board 400, drives the panel 500 to display an image. This eliminates the boost circuit in the mainboard, changing the traditional architecture where the mainboard and logic board 200 are connected to provide power and boost the voltage to the logic board 200. This reduces the cost of the power supply architecture while ensuring the power supply efficiency.

[0098] See Figure 6 In some examples, the logic board 200 includes a first control circuit 210 , a second control circuit 220 , a third control circuit 230 , and a fourth control circuit 240 .

[0099] One end of the first control circuit 210 is connected to the power board 100, and the other end is connected to the source driver 410 of the driver board 400. The first control circuit 210 is configured to receive the first voltage and output the first voltage to the source driver 410 of the driver board 400. Specifically, the first control circuit 210 outputs the first voltage to the source driver 410 of the driver board 400 in a timed manner. The first control circuit 210 includes components capable of performing timed control.

[0100] See Figure 7In some examples, the first control circuit 210 includes a first control element 211 and a field effect transistor 212. The input end of the first control element 211 is connected to the power board 100. The gate of the field effect transistor 212 is connected to the first control element 211, the drain is connected to the power board, and the source is connected to the source driver 410. The first control element 211 is configured to output a timing voltage according to the first voltage and a preset timing to control the on and off of the field effect transistor 212. When the field effect transistor 212 is turned on, it outputs the first voltage to the source driver 410. The field effect transistor 212 can also be replaced by other components, as long as it can be turned on or off under the control of the first control element 211, and outputs the first voltage to the source driver 410 when turned on, and stops outputting the first voltage to the source driver 410 when turned off. In some examples, the field effect transistor 212 can be built into the first control element 211, or it can be as Figure 3 Preferably, the field effect transistor 212 is built into the first control element 211 to reduce the heat generated by the field effect transistor 212 while meeting the requirement for passing a larger current. The field effect transistor 212 built into the first control element 211 is suitable for being configured in most panels 500, which can reduce the development cost and use cost of the display device 10 in the future.

[0101] See also Figure 6 One end of the second control circuit 220 is connected to the power board 100, and the other end is connected to the source driver 410 of the driving board 400. Specifically, the second control circuit 220 is configured to receive the first voltage and output a second voltage after stepping down the voltage (such as Figure 5 The second control circuit 220 includes a voltage-drop element or a voltage-drop circuit.

[0102] For some examples, see Figure 7 , the second control circuit 220 includes a second control element 221 and a first inductor 222. The input of the second control element 221 is connected to the power board 100, one end of the first inductor 222 is connected to the second control element 221, and the other end is connected to the source driver 410. The second control element 221 is configured to receive the first voltage and step down the voltage to obtain the second voltage, and output the second voltage to the source driver 410 through the first inductor 222. The second control element 221 includes a circuit structure or components capable of stepping down the voltage. The circuit structure and the components can be set according to actual needs and are not limited in this embodiment. The number of coils, specifications, etc. of the first inductor 222 can be set according to actual needs and are not limited in this embodiment.

[0103] See also Figure 6One end of the third control circuit 230 is connected to the power board 100, and the other end is connected to the gate driver 420 of the driving board 400. The third control circuit 230 is configured to receive the first voltage and output a third voltage (such as Figure 5 The third voltage may be more than 30 volts. The third control circuit 230 includes a boost element or a boost circuit.

[0104] For some examples, see Figure 7 The third control circuit 230 includes a third control element 231 and a second inductor 232. The input of the third control element 231 is connected to the power board 100, one end of the second inductor 232 is connected to the power board 100, and the other end is connected to the gate driver 420. The third control element 231 is configured to receive the first voltage and output a voltage after boosting. The third voltage includes the voltage output by the second inductor 232 and the voltage output by the third control element 231. The third control element 231 includes a boost circuit. The number of coils of the third inductor 242 can be set according to actual needs and is not limited in this embodiment. In some examples, a diode D1 is also included, the cathode of the diode D1 is connected to the gate driver 420, and the anode is connected to the other end of the second inductor 232 and the output end of the third control element 231.

[0105] See Figure 6 One end of the fourth control circuit 240 is connected to the power board 100, and the other end is connected to the gate driver 420 of the driving board 400. The fourth control circuit 240 is configured to receive the first voltage and output a fourth voltage (such as Figure 5 The fourth voltage may be -10 V. The fourth control circuit 240 includes a step-down element or a step-down circuit.

[0106] For some examples, see Figure 7 The fourth control circuit 240 includes a fourth control element 241, a third inductor 242 and a diode D2.

[0107] The input of the fourth control element 241 is connected to the power board 100, one end of the third inductor 242 is connected to the fourth control element 241, and the other end is grounded. The cathode of the diode is connected to one end of the third inductor 242 and the output of the fourth control element 241, and the anode is connected to the gate driver 420. The fourth control element 241 is configured to receive the first voltage and output the fourth voltage after stepping down the voltage, and output the fourth voltage to the gate driver 420 through the anode of the diode. The fourth control element 241 includes a step-down element or a step-down circuit. The number of coils of the third inductor 242 can be set according to actual needs and is not limited in this embodiment. The diode is configured to protect the fourth control element 241 and the third inductor 242.

[0108] As described above, the first driving circuit includes the first voltage, the second voltage, the third voltage and the fourth voltage.

[0109] See also Figure 7 Part of the voltage of the gate driver 420 (3.3V voltage) is output by the mainboard 300, and part of the voltage of the source driver 410 (1.8V voltage) is output by the mainboard 300. In some examples, both the 3.3V voltage and the 1.8V voltage are output by the step-down circuit 310 on the mainboard 300.

[0110] In summary, other control circuits may also be provided in the logic board 200 provided in this embodiment. The circuit structures and circuit elements in the first control circuit 210, the second control circuit 220, the third control circuit 230 and the fourth control circuit 240 may be changed according to actual needs, as long as the above-mentioned functions are met. This embodiment does not impose too many restrictions.

[0111] See Figure 8In some examples, the display device 10 further includes a step-down circuit 310, which is disposed on the mainboard 300. The step-down circuit 310 is connected to the power board 100. The step-down circuit 310 of the mainboard is configured to output a second driving voltage to the driving board 400 after stepping down the first voltage. The second driving voltage includes part of the voltage of the gate driver 420 (3.3V voltage) and part of the voltage of the source driver 410 (1.8V voltage) as described above. Compared with the traditional solution, this embodiment places the step-down circuit portion corresponding to the 3.3V voltage and the 1.8V voltage on the mainboard 300 end. Based on the step-down circuit conversion to obtain the 3.3V voltage and the 1.8V voltage, the logic board 200 can directly reuse the 3.3V voltage and the 1.8V voltage output on the mainboard 300, thereby reducing the cost of the display device 10. The display device 10 further includes a power amplifier circuit 320, which is configured to amplify and output audio. The power amplifier circuit 320 is connected to the power board 100. The power amplifier circuit 200 is configured to receive the first voltage. The advantage is that when high audio power is required (for example, more than 2*10W undistorted power), the power board 100 does not need to add a circuit to output high voltage, thereby reducing costs.

[0112] See Figure 9 In some examples, the buck circuit 310 includes a primary buck circuit 311, multiple secondary buck circuits 312, and multiple voltage regulator assemblies 313. The primary buck circuit 311 and the multiple secondary buck circuits 312 constitute a primary power supply circuit, and the multiple voltage regulator assemblies 313 constitute a secondary power supply circuit.

[0113] The main buck circuit 311 is connected to the power board 100, each of the secondary buck circuits 312 is connected to the main buck circuit 311, and each of the voltage regulator combinations 313 is connected to the main buck circuit 311 or one of the secondary buck circuits 312. The main buck circuit 311 is configured to receive the first voltage and output a fifth voltage after voltage reduction, and each of the secondary buck circuits 312 is configured to receive the fifth voltage and output a sixth voltage after voltage reduction. The sixth voltages output by different secondary buck circuits 312 are different, and the sixth voltage output by the secondary buck circuit 312 connected to the voltage regulator combination 313 is the largest. For example, Figure 9 As shown, when the voltage regulator assembly 313 is connected to the secondary buck circuit 312, the sixth voltage output by the connected secondary buck circuit 312 is 3.3V, which is greater than the sixth voltage output by any other secondary buck circuit 12. When the voltage regulator assembly 313 is connected to the main buck circuit 311, the fifth voltage received is 5V. For example Figure 9 As shown, the sixth voltage output by the secondary step-down circuit 312 may also be 1.0V_CORE, 1.0V_CPU, 1.5V / 1.2V_DDR, etc.

[0114] For example Figure 9 As shown, the output end of the primary buck circuit 311 and the output end of the secondary buck circuit 312 are both connected to the inductor L1 . The number of coils of the inductor can be selected according to actual needs and is not limited in this embodiment.

[0115] The voltage regulator assembly 313 is configured to receive the sixth voltage and output a seventh voltage, and the seventh voltage output by the voltage regulator assembly 313 is different. Figure 9 As shown, the seventh voltage output by the voltage regulator assembly 313 can be 2.5V, 1.8V, or 1.2V.

[0116] The specifications and models of the primary buck circuit 311 , the secondary buck circuit 312 , and the voltage stabilizer assembly 313 can be selected according to actual needs and are not limited in this embodiment.

[0117] In summary, in the buck circuit 310 provided in this embodiment, only one main buck circuit 311 receives a high voltage (the first voltage, for example, 15V) input, and the secondary buck circuit 312 receives the fifth voltage (for example, 5V), which is a low voltage. Compared to the circuit structure in the traditional solution where each buck circuit receives a high voltage input, the buck circuit 310 provided in this embodiment can reduce the cost of the buck circuit, thereby reducing the cost of the power supply architecture of the entire display device 10. In addition, when the display device 10 is in standby mode, the secondary buck circuit 312 provided in this embodiment has fewer buck structures, which can further reduce the power consumption of the buck circuit 310 in standby mode, thereby further reducing the power consumption of the power supply architecture of the display device 10.

[0118] For some examples, see Figure 10 , the two main buck circuits 311 in the buck circuit 310 are directly connected to the power board 100 and receive the first voltage. Among them, one main buck circuit 311 converts the first voltage into the sixth voltage, and the sixth voltage is 1.0V_CORE as described above. The other main buck circuit 311 is connected to multiple secondary buck circuits 312 and is configured to convert the first voltage into the fifth voltage and then input it to each connected secondary buck circuit 312. The secondary buck circuit 312 outputs the sixth voltage, and the sixth voltage is, for example, Figure 11 The step-down circuit 310 further includes the voltage regulator assembly 313 and the coil L1 as described above.

[0119] For some examples, see Figure 11 , you can also Figure 7 The two main buck circuits 311 are integrated on one circuit board, and Figure 11The multiple sub-step-down circuits 312 are shown to be integrated on one circuit board.

[0120] The connection relationship between the step-down circuits in the step-down circuit 310 and the specifications of the step-down circuits can also be set according to actual needs, as long as the cost of the display device 10 can be reduced while achieving the above functions. This embodiment does not impose too many restrictions.

[0121] In summary, the power board 100 provided in this embodiment directly powers the logic board 200 and the step-down circuit 310 on the main board 300. This eliminates the need for an additional boost circuit between the power board 100 and the logic board 200, reducing the cost of the display device 10. Furthermore, the reduced cost of the step-down circuit 310 further reduces the cost of the display device 10.

[0122] See Figure 12 In some examples, the display device 10 further includes the driver board 400 and the panel 500 as described above. The driver board 400 includes a source driver 410 and a gate driver 420. The specifications and models of the source driver 410 and the gate driver 420 can be selected according to actual needs and are not limited in this embodiment. The panel 500 can be a liquid crystal panel 500 or other types of panels 500, which are not limited in this embodiment.

[0123] For some examples, see Figure 13 The display device 10 further includes a backlight circuit 600 , and the power board 100 is further configured to output a backlight driving voltage (V-led) to the backlight circuit 600 to drive the backlight display of the panel 500 .

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

[0125] For ease of explanation, the above description has been made with reference to specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The above embodiments are selected and described to better explain the principles and practical applications, so that those skilled in the art can better utilize the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A display device, characterized in that: The display device includes: a power board and a logic board; The logic board is connected to the power board; The power board is configured to receive mains power and convert the mains power into a first voltage before outputting it; The logic board is configured to receive the first voltage and output a first driving voltage to a driving board based on the first voltage, wherein the driving board is configured to drive the panel to display an image; The first voltage is a voltage required by the driving board to drive the panel to display an image.

2. The display device according to claim 1, wherein The first voltage is greater than or equal to 14V and less than or equal to 19V.

3. The display device according to claim 1 or 2, characterized in that The logic board includes: a first control circuit, a second control circuit, a third control circuit and a fourth control circuit; One end of the first control circuit, the second control circuit, the third control circuit, and the fourth control circuit is connected to the power board; the other ends of the first control circuit and the second control circuit are connected to the source driver of the driving board; the other ends of the third control circuit and the fourth control circuit are connected to the gate driver of the driving board; The first control circuit is configured to receive the first voltage and output the first voltage to the source driver of the driving board; the second control circuit is configured to receive the first voltage and output a second voltage to the source driver after stepping down the voltage; The third control circuit is configured to receive the first voltage and output a third voltage to the gate driver of the driving board after boosting the voltage; the fourth control circuit is configured to receive the first voltage and output a fourth voltage to the gate driver after bucking the voltage.

4. The display device according to claim 3, wherein The first control circuit includes: a first control element and a field effect transistor; The input of the first control element is connected to the power board, The gate of the field effect transistor is connected to the first control element, the drain is connected to the power board, and the source is connected to the source driver; The first control element is configured to output a timing voltage according to the first voltage and a preset timing to control the on and off of the field effect tube. When the field effect tube is turned on, the first voltage is output to the source driver.

5. The display device according to claim 3, wherein The second control circuit includes: a second control element and a first inductor; The input of the second control element is connected to the power board, one end of the first inductor is connected to the second control element, and the other end is connected to the source driver; The second control element is configured to receive the first voltage and step down the voltage to obtain the second voltage, and output the second voltage to the source driver through the first inductor.

6. The display device according to claim 3, wherein The third control circuit includes: a third control element and a second inductor; The input of the third control element is connected to the power board, one end of the second inductor is connected to the power board, and the other end is connected to the gate driver; The third control element is configured to receive the first voltage and output a boosted voltage; The third voltage includes a voltage output by the second inductor and a voltage output by the third control element.

7. The display device according to claim 3, wherein: The fourth control circuit includes: a fourth control element, a third inductor, and a diode; The input of the fourth control element is connected to the power board, one end of the third inductor is connected to the fourth control element, and the other end is grounded; The cathode of the diode is connected to one end of the third inductor and the output of the fourth control element, and the anode is connected to the gate driver; The fourth control element is configured to receive the first voltage, step down the voltage, and output the fourth voltage, and output the fourth voltage to the gate driver through the anode of the diode.

8. The display device according to claim 1, wherein The display device further includes: a step-down circuit; The step-down circuit is connected to the power board; The step-down circuit is configured to receive the first voltage and operate based on the first voltage, and is further configured to step down the first voltage and output a second driving voltage to the driving board.

9. The display device according to claim 8, wherein The step-down circuit includes: a main step-down circuit, multiple secondary step-down circuits, and multiple voltage stabilizer combinations; The main step-down circuit is connected to the power board, each of the secondary step-down circuits is connected to the main step-down circuit, and each of the voltage regulator combinations is connected to the main step-down circuit or one of the secondary step-down circuits; The main step-down circuit is configured to receive the first voltage and output a fifth voltage after stepping down the voltage, and each of the secondary step-down circuits is configured to receive the fifth voltage and output a sixth voltage after stepping down the voltage; The sixth voltages output by different secondary buck circuits are different, and the sixth voltage output by the secondary buck circuit connected to the voltage regulator combination is the largest; The voltage regulator combination is configured to receive the sixth voltage and output a seventh voltage, and the seventh voltage output by different voltage regulator combinations is different; The second driving voltage includes the sixth voltage and the seventh voltage.

10. The display device according to claim 1, wherein Also includes: The driving board and the panel.

Images