Interface circuit, control method and display device of display device

Abstract

The present application discloses an interface circuit, a control method and a display device of a display device, including: a connector, the connector includes at least three interfaces, one of which is connected to a display system port or an adapter, and the other two interfaces are respectively connected to a timing control port and a power supply port; the connector includes a first branch formed by a serial clock pin and a first serial data pin, and a second branch formed by a serial clock pin and a second serial data pin; the display system port and the timing control port are respectively connected to the first branch, and the power supply port is connected to the second branch; the adapter is used to conduct the first branch and the second branch. The interface circuit provided in the embodiment of the present application can realize the communication connection between the system and the timing controller, and can also realize the communication connection between the timing controller and the power chip, realize anti-crosstalk, and prevent the system from tampering with the data of the power chip when accessing the timing controller; reduce the distortion of the I2C high-speed signal.

Description

Technical Field

[0001] The present application generally relates to the field of display technology, and specifically relates to an interface circuit, a control method and a display device of a display device. Background Art

[0002] For some common notebook products, the frame rate of some games and applications is higher and the performance is more stable when using the graphics card direct connection mode; while the power consumption of the whole machine is lower when using the mixed output mode. Therefore, the graphics card needs to switch between the mixed output mode and the graphics card direct connection mode in different application scenarios. This switch needs to be switched in the BIOS system or switched in the computer manager and then restarted to take effect, which is relatively cumbersome.

[0003] In the prior art, the DDS function is proposed, and when switching between different graphics card modes, there is no need to enter the BIOS settings or restart the computer. You can open the "Manage Display Mode" in the system interface, select the corresponding mode, and the system will complete the switching of the graphics card mode within a few seconds as needed without restarting.

[0004] However, in the prior art, when the DDS function is turned on, since the system, TCON and POWER are on the same main communication line, the system accesses the POWER IC while communicating with the TCON. In this project, the GPU accesses the POWER IC through I2C, tampers with the VCOM value inside the POWER IC, causing voltage anomalies and screen flickering. Summary of the invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide an interface circuit, a control method and a display device for a display device, which can solve the problem of display abnormality caused by tampering of POWER IC and other data that may occur during the process of enabling the dynamic display switching function in the prior art.

[0006] In a first aspect, the present application provides an interface circuit of a display device, comprising: a connector, wherein the connector comprises at least three interfaces, one of which is connected to a display system port or an adapter, and the remaining two interfaces are connected to a timing control port and a power supply port, respectively; wherein,

[0007] The connector includes a first branch formed by a serial clock pin and a first serial data pin and a second branch formed by the serial clock pin and a second serial data pin;

[0008] The display system port and the timing control port are respectively connected to the first branch, and the power supply port is connected to the second branch;

[0009] The adapter is used to connect the first branch and the second branch.

[0010] Optionally, the connector comprises:

[0011] Connect the circuit board,

[0012] A first interface provided at one side of the connection circuit board, the first interface being used to connect to the display system port or the adapter;

[0013] At least two second interfaces are arranged on the other side of the connecting circuit board, and the second interfaces are connected to the timing control port and the power supply port.

[0014] Optionally, the first interface is a first gold finger, and the second interface is an I2C pin of a physical line.

[0015] Optionally, the first serial data pin and the second serial data pin are physically isolated on the first gold finger.

[0016] Optionally, the display system port includes a second gold finger matched with the first interface, and the second gold finger has an empty pin at a pin corresponding to the second serial data pin.

[0017] Optionally, the connector is connected to a memory port via the second interface, and the memory port is connected to a first branch via the serial clock pin and the first serial data pin.

[0018] Optionally, the adapter includes:

[0019] Adapter circuit board;

[0020] A first side interface provided at one side of the adapter circuit board, the first side interface being used to connect to a test port, wherein the test port is used to provide a test signal for testing the display device;

[0021] A second side interface is provided on the other side of the adapter circuit board, and the second side interface is used to connect with the connector.

[0022] Optionally, the second side interface is a third gold finger that cooperates with the connector, the third gold finger includes a first pin that cooperates with the first serial data pin and a second pin that cooperates with the second serial data pin, and the adapter circuit board is electrically connected at the first pin and the second pin.

[0023] Optionally, the first pin and the second pin are two adjacent pins on the third gold finger.

[0024] In a second aspect, the present application provides a method for controlling a display device, using an interface circuit of a display panel as described above, the method comprising a test mode and a display mode; wherein:

[0025] In the test mode, the adapter is connected to the connector, and the first branch and the second branch are connected through the adapter to achieve connection between the timing control port and the power supply port;

[0026] In the display mode, the display system port is connected to the connector to achieve connection between the timing control port and the display system port on the first branch.

[0027] In a third aspect, the present application provides a display device, which adopts the control method as described above.

[0028] The technical solution provided by the embodiments of the present application may have the following beneficial effects:

[0029] The interface circuit provided in the embodiment of the present application can realize the communication connection between the system and the timing controller, and at the same time realize the communication connection between the timing controller and the power chip, realize anti-crosstalk, and prevent the system from tampering with the data of the power chip when accessing the timing controller; the interface circuit provided in the present application does not need to increase the layout on other display devices, reduces the distortion of I2C high-speed signals, does not require any hardware or software changes on the client, and simplifies the solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0031] Figure 1 A schematic diagram of the structure of a display device provided in an embodiment of the present application;

[0032] Figure 2 A connection diagram of an interface circuit of a display device provided in an embodiment of the present application;

[0033] Figure 3 A schematic diagram of the structure of a connector provided in an embodiment of the present application;

[0034] Figure 4 A schematic diagram of a 40-pin pin definition in the prior art provided for an embodiment of the present application;

[0035] Figure 5 A connection diagram of an interface circuit of another display device provided in an embodiment of the present application;

[0036] Figure 6A schematic diagram of the structure of an adapter provided in an embodiment of the present application;

[0037] Figure 7 A wiring diagram of an adapter provided in an embodiment of the present application;

[0038] Figure 8 A schematic diagram of a principle of an interface circuit of a display device provided in an embodiment of the present application;

[0039] Fig. 9 A schematic diagram of a simulation waveform provided for an embodiment of the present application;

[0040] Fig.10 A flowchart of a method for controlling a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0042] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0043] like Figure 1 As shown, a display device is provided in the present application. The present invention does not impose any specific restrictions on the applicability of the display device, which can be any product or component with a display function, such as a television, a laptop computer, a tablet computer, a wearable display device, a mobile phone, a car display, a navigation, an e-book, a digital photo frame, an advertising light box, etc.

[0044] The display device includes: a memory 101, which can be accessed by a CPU 102, a peripheral interface 103, etc. The memory 101 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more disk storage devices, flash memory devices, or other volatile solid-state storage devices.

[0045] The peripheral interface 103 can connect the input and output peripherals of the device to the CPU 102 and the memory 101 .

[0046] The I / O subsystem 109 can connect the input and output peripherals on the device, such as the touch screen 112 and other input / control devices 110, to the peripheral interface 103. The I / O subsystem 109 may include a display controller 1091 and one or more input controllers 1092 for controlling other input / control devices 110. Among them, the one or more input controllers 1092 receive electrical signals from other input / control devices 110 or send electrical signals to other input / control devices 110. Other input / control devices 110 may include physical buttons (press buttons, rocker buttons, etc.), dials, slide switches, joysticks, and click wheels. It is worth noting that the input controller 1092 can be connected to any of the following: a keyboard, an infrared port, a USB interface, and a pointing device such as a mouse.

[0047] The touch screen 112 is an input interface and an output interface between the user terminal and the user, and displays visual output to the user. The visual output may include graphics, text, icons, videos, etc.

[0048] The communication module 113 is used for Bluetooth network connection and data communication with other devices equipped with wireless communication modules.

[0049] The display controller 1091 in the I / O subsystem 109 receives an electrical signal from the touch screen 112 or sends an electrical signal to the touch screen 112. The touch screen 112 detects contact on the touch screen, and the display controller 1091 converts the detected contact into interaction with a user interface object displayed on the touch screen 112, that is, realizes human-computer interaction. The user interface object displayed on the touch screen 112 may be an icon for running a game, an icon for connecting to a corresponding network, etc. It is worth noting that the device may also include an optical mouse, which is a touch-sensitive surface that does not display a visual output, or an extension of a touch-sensitive surface formed by the touch screen.

[0050] The RF circuit 105 is mainly used to establish communication between the mobile phone and the wireless network (i.e., the network side) to realize data reception and transmission between the mobile phone and the wireless network. For example, sending and receiving short messages, emails, etc. Specifically, the RF circuit 105 receives and sends RF signals, which are also called electromagnetic signals. The RF circuit 105 converts electrical signals into electromagnetic signals or converts electromagnetic signals into electrical signals, and communicates with the communication network and other devices through the electromagnetic signals. The RF circuit 105 may include known circuits for performing these functions, including but not limited to antenna systems, RF transceivers, one or more amplifiers, tuners, one or more oscillators, digital signal processors, CODEC (COder-DECoder, codec) chipsets, Subscriber Identity Module (SIM), etc.

[0051] The audio circuit 106 is mainly used to receive audio data from the peripheral interface 103 , convert the audio data into an electrical signal, and send the electrical signal to the speaker 111 .

[0052] The speaker 111 is used to restore the voice signal received by the mobile phone from the wireless network through the RF circuit 105 to sound and play the sound to the user.

[0053] The power management chip 108 is used to provide power and manage the power for the CPU 102, the I / O subsystem, and the hardware connected to the peripheral interface.

[0054] In an embodiment of the present application, a display device includes a display panel and a driving circuit for driving the display panel. The driving circuit includes a timing controller (TCON), a gate driving circuit, and a source driving circuit. TCON can output a fixed-frequency control signal to the gate driving circuit, so that the gate driving circuit can scan the pixel unit of the display panel according to the frequency of the control signal. The timing controller is adapted to different resolutions, and the display panel can access TCON to achieve switching of different resolutions.

[0055] Please see Figure 2 As shown, the present application provides an interface circuit of a display device, including: a connector 200, the connector 200 includes at least three interfaces, one of which is connected to a display system port 300 or an adapter 400, and the other two interfaces are respectively connected to a timing control port 500 and a power supply port 600. The connector 200 includes a first branch formed by a serial clock pin SCL and a first serial data pin SDA, and a second branch formed by the serial clock pin SCL and a second serial data pin SDA_P; the display system port 300 and the timing control port 500 are respectively connected to the first branch, and the power supply port 600 is connected to the second branch; the adapter 400 is used to conduct the first branch and the second branch.

[0056] When setting, Figure 3 As shown, the connector 200 includes: a connecting circuit board 201; a first interface 202 arranged on one side of the connecting circuit board 201, and the first interface 202 is used to connect to the display system port 300 or the adapter 400; at least two second interfaces 203 arranged on the other side of the connecting circuit board 201, and the second interfaces 203 are connected to the timing control port 500 and the power supply port 600.

[0057] The first interface 202 is a first gold finger, and the second interface 203 is an I2C pin of a physical line. The first serial data pin SDA and the second serial data pin SDA_P are physically isolated on the first gold finger. In other embodiments, the I2C interface can also be replaced by an interface of the same type.

[0058] In the embodiment of the present application, the display system port 300 is connected to the display mainboard, the timing control port 500 is connected to the timing controller TCON, and the display system port 300 and TCON use a two-wire serial bus (English: Inter-Integrated Circuit; abbreviated as: I2C) when performing display switching, wherein SDA (Serial Data Line) is a line for sending and receiving data between the master and slave stations, and SCL (Serial Clock Line) is a line that carries the clock signal. I2C can send and receive data through the serial bus composed of SDA and SCL. Bidirectional transmission is performed between ICs, with a maximum transmission rate of 100kbps. Each IC connected in parallel on a bus has a unique address. For those skilled in the art, data transmission between multiple chips through I2C is well known, and this application will not be repeated here.

[0059] In the embodiment of the present application, the display system port 300 includes a second gold finger matched with the first interface 202, and the pin of the second gold finger corresponding to the second serial data pin SDA_P is an empty pin.

[0060] An exemplary description is given by taking the communication interface between the display system port 300 and the timing controller as a 40-pin eDP connector 200 . Figure 4 FIG. 4 shows a 40-pin pin definition in the prior art, wherein Pin1, Pin34, and Pin35 are all NC (no connection).

[0061] The new digital video interface (EmbeddedDisplayPort, eDP for short) is a digital interface based on the DisplayPort structure and protocol. It is a new digital audio and video interface defined by the Video Electronics Association (VESA) to replace the traditional analog video interface (VGA), digital video interface (DVI), and the internal interface between the system and the panel (LVDS interface). It has a wide bandwidth and supports high-definition and ultra-high-definition resolutions. It has great advantages in high-definition display. More and more related modules have been applied to FHD and higher-resolution display modules.

[0062] When applying, set Pin1 on the first gold finger of 40Pin, which was originally "NC", to SCL, and set Pin34, which was originally "NC", to SDA. Through this setting, the relevant modules of the graphics card switching inside TCON can be accessed through the I2C communication protocol when the DDS system is turned on.

[0063] Set Pin35 on the first gold finger, which was originally "NC", to SDA_P. Through this setting, when performing operations such as burning in the factory, the power chip and TCON can be connected to the same I2C network to realize the burning function.

[0064] The second gold finger on the corresponding display system can be set to SCL at the position corresponding to the serial clock pin SCL, set to SDL at the position corresponding to the first serial data pin SDA, and set to "NC" at the position corresponding to the second serial data pin SDA_P. Through this setting, when the port is connected, the isolation between SDA and SDA_P is achieved, so that the display system port 300 and the power chip are not on the same communication main line, and the power IC will not be accessed when the system accesses TCON, so data tampering will not occur.

[0065] It is worth noting that in the embodiment of the present application, 40 pins are used for exemplary description. In some other embodiments, the connector 200 may also adopt a 60-pin standard connector 200, a 68-pin standard connector 200, an 80-pin standard connector 200, or a 96-pin standard connector 200. In the embodiment of the present application, this is not limited. Different settings can be made according to different devices and different application scenarios without violating the inventive concept of the present application.

[0066] like Figure 5 As shown, the connector 200 is connected to the memory port through the second interface 203, and the memory port is connected to the first branch through the serial clock pin SCL and the first serial data pin SDA.

[0067] In the embodiment of the present application, a data register EEPROM is connected through the memory port. Since the data processing volume of TCON is very large, in order to temporarily store data and to make the TCON main chip more versatile, a data register is connected next to the TCON main chip, and information is exchanged according to the I2C protocol through the bidirectional serial data line SDA and the SCL serial clock line.

[0068] It should be noted that in the embodiment of the present application, TCON is used to switch between different graphics cards. When applied, EEPROM can be used to enable each host graphics card to automatically read the display model information in the EEPROM of the channel where it is located, thereby completing the graphics card configuration at startup.

[0069] The TCON is provided with a graphics card switching control module, and the functions of the display switching control module include but are not limited to the preset PCIE display path selection rule, which specifies how the CPU selects the PCIE path to send display information when the system motherboard is started. The preset PCIE display path selection rule is as follows: when the system motherboard is connected to the first graphics card, the CPU selects the PCIE path where the graphics card is located to send display information; when the system motherboard is connected to the second graphics card, the CPU selects the PCIE path where the graphics card is located to send display information.

[0070] When switching graphics cards, the system accesses TCON to switch internal graphics cards without restarting the device, thus achieving free switching of graphics cards.

[0071] In the embodiments of the present application, Figure 6 As shown, the adapter 400 includes: an adapter circuit board 401; a first side interface 402 arranged on one side of the adapter circuit board 401, the first side interface is used to connect to a test port 700, wherein the test port 700 is used to provide a test signal for testing the display device; and a second side interface 403 arranged on the other side of the adapter circuit board 401, the second side interface is used to connect to the connector 200.

[0072] It should be noted that in the embodiment of the present application, both the converter and the display system end are connected to the first interface 202 of the connector 200 . Therefore, in terms of setting, the display system end and the converter have the same wiring terminals at the position where they are connected to the first interface 202 .

[0073] In the embodiment of the present application, the second side interface is a third gold finger that cooperates with the connector 200, and the third gold finger includes a first pin 404 that cooperates with the first serial data pin SDA and a second pin 405 that cooperates with the second serial data pin SDA_P. The adapter circuit board is electrically connected at the first pin 404 and the second pin 405. Figure 7 shown.

[0074] The first pin and the second pin are two adjacent pins on the third gold finger.

[0075] It should be noted that the transfer circuit board includes a plurality of pads 406 connected to the third gold finger and leads 407 corresponding to the pads one by one. In the embodiment of the present application, the pads are arranged in two rows, and the pads on each row are arranged in an array, with the pads away from the lead position as the first row and the pads close to the lead position as the second row, wherein the pads on the second row are arranged at the interval between the pads in the first row. Through this setting scheme, the pad wiring space can be saved and the number of pins can be increased.

[0076] The leads corresponding to the first pin and the second pin are connected at a certain position of the adapter circuit board. The wiring at the input port of the adapter board (i.e., the port connected to the test system) is independent of each other, and a short circuit is set at a position close to the third gold finger.

[0077] like Figure 8 As shown, when setting, set Pin1, which was originally "NC", on the third gold finger of 40Pin to SCL, set Pin34, which was originally "NC", to SDA, and set Pin35, which was originally "NC", to SDA_P. On the gold finger, they are independent pins. On the transfer circuit board, connect Pin34 and Pin35 to achieve communication between Pin34 and Pin35 on the third gold finger. With this setting, when performing operations such as burning in the factory, the power chip and TCON can be connected to the same I2C network to achieve the burning function.

[0078] By simulating the waveform of the adapter 400, the simulated waveform obtained is as follows: Fig. 9 As shown in the figure, it can be seen that the network signals of SDA and SDA_P are consistent, and TCON and the power chip can communicate normally.

[0079] The timing controller includes a variety of functional modules. In the embodiment of the present application, in addition to the input circuit module connected to the display system port 300, it also includes an output circuit module between the data drive circuit, a driver IC control function block, a data processing function block, and a display screen special technology function block. In the embodiment of the present application, the I2C master device communicates with the power chip, which belongs to the display screen special technology function block. It should be noted that the special processing required for different display screens may be different, so the corresponding TCON function blocks are also different. For example, commonly used display screen special technology related function blocks include data interaction, fail-safe, ROM / serial bus structure, etc.

[0080] In an embodiment of the present application, TCON includes a built-in ROM and an external EEPROM, wherein the built-in ROM is used to burn fixed parameter values, and the EEPROM is used to adjust various parameter values, for example, the graphics card parameters described in the present application.

[0081] In an embodiment of the present application, the power interface is connected to a power chip, and the power chip also includes an interface connected to a system interface. The power circuit is used to generate other operating voltages from the voltage input through the system interface.

[0082] In the embodiment of the present application, a port for connecting to a power chip is provided on the eDP connector 200 of the interface circuit, so that the power chip can be accessed during generation and debugging, and the display panel can be lit through the adapter 400 to complete the burning function.

[0083] It is worth noting that in the embodiment of the present application, providing a power interface on the interface circuit for communicating with the power chip does not affect the display system in the display mode and the communication between the TCON and the power chip.

[0084] like Fig.10 As shown, the present application also provides a control method for a display device, using an interface circuit of a display panel as described above, the method includes a test mode and a display mode; wherein,

[0085] S02 . In the test mode, the adapter 400 is connected to the connector 200 , and the first branch and the second branch are conducted through the adapter 400 , so that the timing control port 500 is connected to the power supply port 600 .

[0086] S04. When in test mode, TCON and the power chip are connected to the same I2C route through SDA and SDA_P. The power chip can be accessed through TCON to perform VCOM adjustment and burning.

[0087] For example, VCOM adjustment, Gamma adjustment, ACC Turning, EDID feature data writing and other functions can be performed to personalize the module unit to optimize the performance of the module unit. In this usage scenario, the test system and TCON are connected to the SCL / SDA network, and the power IC is connected to the SCL / SDA_P network. The SDA and SDA_P networks are merged into the same network through the adapter 400, so that the TCON and POWER IC are connected to the same I2C communication network.

[0088] In the display mode, the display system port 300 is connected to the connector 200 to realize the connection between the timing control port 500 and the display system port 300 on the first branch.

[0089] When in display mode, the system signal from the whole mainboard is connected to the timing controller through the display system port 300, and various display data and timing control signals are provided to the driving circuit through TCON. After these data signals and part of the signals are transmitted to the power supply circuit, the power supply voltage required for the operation of other circuits is generated. Part of these data and signals are transmitted to the timing control circuit to generate the working timing of the data driving circuit and the scanning driving circuit. The data driving circuit converts the signal related to the display data from TCON into an analog voltage, and the data is sent to the pixel electrode; the scanning driving circuit generates a high and low level digital voltage, which is output to the gate of the TFT transistor to control the switching state of each row of pixels.

[0090] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention 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 operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0091] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0092] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "setting" and the like appearing in this article can mean that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0093] The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and illustration, and are not intended to limit the present invention to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention.

Claims

1. An interface circuit for a display device, characterized in that: include: A connector, wherein the connector includes at least three interfaces, one of which is connected to a display system port or an adapter, and the other two interfaces are connected to a timing control port and a power supply port respectively; wherein, The connector includes a first branch formed by a serial clock pin and a first serial data pin and a second branch formed by the serial clock pin and a second serial data pin; The display system port and the timing control port are respectively connected to the first branch, and the power supply port is connected to the second branch; The adapter is used to connect the first branch and the second branch; Wherein, the adapter comprises: Adapter circuit board; A first side interface provided at one side of the adapter circuit board, the first side interface being used to connect to a test port, wherein the test port is used to provide a test signal for testing the display device; A second side interface is provided on the other side of the adapter circuit board, and the second side interface is used to connect with the connector.

2. The interface circuit of the display device according to claim 1, characterized in that: The connector comprises: Connect the circuit board, A first interface provided at one side of the connection circuit board, the first interface being used to connect to the display system port or the adapter; At least two second interfaces are arranged on the other side of the connecting circuit board, and the second interfaces are connected to the timing control port and the power supply port.

3. The interface circuit of the display device according to claim 2, characterized in that: The first interface is a first gold finger, and the second interface is an I2C pin of a physical line.

4. The interface circuit of the display device according to claim 3, characterized in that: The first serial data pin and the second serial data pin are physically isolated on the first gold finger.

5. The interface circuit of the display device according to claim 3, characterized in that: The display system port includes a second gold finger matched with the first interface, and the second gold finger is an empty pin at a pin corresponding to the second serial data pin.

6. The interface circuit of the display device according to claim 2, characterized in that: The connector is connected to the memory port via the second interface, and the memory port is connected to the first branch via the serial clock pin and the first serial data pin.

7. The interface circuit of the display device according to claim 1, characterized in that: The second side interface is a third gold finger that cooperates with the connector, and the third gold finger includes a first pin that cooperates with the first serial data pin and a second pin that cooperates with the second serial data pin. The adapter circuit board is electrically connected at the first pin and the second pin.

8. The interface circuit of the display device according to claim 7, characterized in that: The first pin and the second pin are two pins located adjacent to each other on the third gold finger.

9. A method for controlling a display device, characterized in that: Using the interface circuit of the display device according to any one of claims 1 to 8, the method includes a test mode and a display mode; wherein, In the test mode, the adapter is connected to the connector, and the first branch and the second branch are connected through the adapter to achieve connection between the timing control port and the power supply port; In the display mode, the display system port is connected to the connector to achieve connection between the timing control port and the display system port on the first branch.

10. A display device, characterized in that: The control method as claimed in claim 9 is adopted.

Images