WO2023109058A1

WO2023109058A1 - Double-screen display device and method

Info

Publication number: WO2023109058A1
Application number: PCT/CN2022/099846
Authority: WO
Inventors: 王敬
Original assignee: 西安广和通无线软件有限公司
Priority date: 2021-12-13
Filing date: 2022-06-20
Publication date: 2023-06-22
Also published as: CN114415996A

Abstract

A double-screen display device and method. The double-screen display device comprises: a control assembly (301), a first display screen (302), and a second display screen (303). The control assembly (301) comprises a liquid crystal display controller and a universal connection end. A chip selection output end of the liquid crystal display controller is connected to a chip selection input end of the first display screen (302), and a universal connection end thereof is connected to a chip selection input end of the second display screen (303). A data output end of the liquid crystal display controller is connected to a data input end of the first display screen (302) and a data input end of the second display screen (303), a clock output end of the liquid crystal display controller is connected to a clock input end of the first display screen (302) and a clock input end of the second display screen (303), and a command output end of the liquid crystal display controller is connected to a command input end of the first display screen (302) and a command input end of the second display screen (303).

Description

Dual-screen display device and method

References to related applications

This disclosure claims the priority of the invention patent with the application number 202111523165.3 and the invention name "dual-screen display device and method" submitted to the State Intellectual Property Office of the People's Republic of China on December 13, 2021, and all of it is incorporated by reference The content is incorporated into this disclosure.

field

The present disclosure generally relates to the field of dual-screen technology, and more particularly relates to a dual-screen display device and method.

background

At present, in IoT applications, there are many usage scenarios involving dual screens, such as dual-screen POS (Point of sale, sales terminal), dual-screen bank cash register, smart home, etc. The addition of dual screens not only brings convenience to multi-person interaction , while improving the user experience.

overview

In a first aspect, the present disclosure relates to a dual-screen display device, which includes a control assembly, a first display screen, and a second display screen;

The control assembly includes a liquid crystal display controller and a universal connection terminal;

The chip select output terminal of the liquid crystal display controller is connected to the chip select input terminal of the first display screen, and the common connection terminal is connected to the chip select input terminal of the second display screen; and

The data output end of the liquid crystal display controller is connected to the data input end of the first display screen, the data output end of the liquid crystal display controller is connected to the data input end of the second display screen, and the liquid crystal display The clock output end of the controller is connected to the clock input end of the first display screen, the clock output end of the liquid crystal display controller is connected to the clock input end of the second display screen, and the command of the liquid crystal display controller The output end is connected to the command input end of the first display screen, and the command output end of the liquid crystal display controller is connected to the command input end of the second display screen.

In some embodiments, the control component is configured to control the chip select output terminal to output a first chip select signal to the chip select input terminal of the first display screen, and to control the common connection terminal to output The second chip select signal is sent to the chip select input terminal of the second display screen, so that one of the first display screen and the second display screen is selected at the same time.

In some embodiments, the control component is configured to control the common connection end to output a high level to the chip select input end of the second display screen when the first display screen is in the gating mode, and controlling the chip select output terminal to output a low level to the chip select input terminal of the first display screen.

In some embodiments, the control component is configured to control the chip select output terminal to output a high level to the chip select input terminal of the first display screen when the second display screen is in the gating mode, and controlling the common connection end to output a low level to the chip select input end of the second display screen.

In a second aspect, the present disclosure relates to a dual-screen display method, the method is applied to the dual-screen display device of the present disclosure, and the method includes:

Obtaining a gating pattern, wherein the gating pattern includes a screen identification of the gating; and

According to the strobe mode, control the chip select output terminal to output a first chip select signal to the chip select input terminal of the first display screen, and control the common connection terminal to output a second chip select signal to all The chip select input terminal of the second display screen.

In some embodiments, according to the gating mode, the chip select output terminal is controlled to output a first chip select signal to the chip select input terminal of the first display screen, and the general connection is controlled The step of outputting the second chip select signal to the chip select input terminal of the second display screen includes:

When the strobe mode is the strobe mode of the first display screen, control the common connection terminal to output a high level to the chip select input terminal of the second display screen, and control the chip select output terminal to output Low level to the chip select input terminal of the first display screen.

When the gating mode is the gating mode of the second display screen, control the chip select output terminal to output a high level to the chip select input terminal of the first display screen, and control the output of the common connection terminal low level to the chip select input terminal of the second display screen.

In some implementations, after the acquisition of the strobe mode, according to the strobe mode, the chip select output terminal is controlled to output a first chip select signal to the chip select input of the first display screen terminal, and before controlling the common connection terminal to output the second chip selection signal to the chip selection input terminal of the second display screen, the method also includes:

Controlling the frequency of the serial bus of the liquid crystal display controller, marking the corresponding frequency for the gated display screen.

In some embodiments, according to the gating mode, the chip select output terminal is controlled to output a first chip select signal to the chip select input terminal of the first display screen, and the general connection is controlled After outputting the second chip selection signal to the chip selection input terminal of the second display screen, the method further includes:

obtain operating instructions; and

According to the operation instruction, control the display screen corresponding to the strobe to write data and display the data.

The display screen corresponding to the display screen identifier of the gate is controlled to write initialization configuration parameters.

In some embodiments, the present disclosure provides a dual-screen display device, which includes a control assembly, a first display screen, and a second display screen; the control assembly includes a liquid crystal display controller and a universal connection terminal; a chip selection of the liquid crystal display controller The output terminal is connected to the chip selection input terminal of the first display screen, and the general connection terminal is connected to the chip selection input terminal of the second display screen; the data output terminal of the liquid crystal display controller is connected to the data input terminal of the first display screen, and the data output terminal of the liquid crystal display controller The data output end is connected to the data input end of the second display screen, the clock output end of the liquid crystal display controller is connected to the clock input end of the first display screen, the clock output end of the liquid crystal display controller is connected to the clock input end of the second display screen, and the liquid crystal display controller is connected to the clock input end of the second display screen. The command output terminal of the display controller is connected to the command input terminal of the first display screen, and the command output terminal of the liquid crystal display controller is connected to the command input terminal of the second display screen.

This disclosure simulates the chip select output of the second liquid crystal display controller through the general connection terminal in the control component, and connects the data output terminal, clock output terminal and command output terminal of the liquid crystal display controller to the first display respectively screen and the second display screen, which is equivalent to realizing the control component with one LCD controller through a common connection port, expanding the effect of two LCD display controllers, and only occupying a common connection port, saving hardware pins, no need to add additional components, save hardware costs, and solve the problem that it is difficult to achieve dual-screen display based on a single-screen processor. The operation is simple and convenient, and the user experience is improved.

Brief description of the drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure.

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, In other words, other drawings can also be obtained from these drawings without paying creative labor.

FIG. 1 is a schematic structural diagram of a dual-screen display device in the prior art;

2 is a schematic structural diagram of a dual-screen display device in the prior art;

3 is a schematic structural diagram of a dual-screen display device in an embodiment of the present disclosure;

4 is a schematic flow diagram of a method for dual-screen display in an embodiment of the present disclosure;

FIG. 5 is a schematic flowchart of an operation method for dual-screen display in an embodiment of the present disclosure; and

FIG. 6 is a schematic flowchart of a method for initializing and configuring dual-screen display in an embodiment of the present disclosure.

detail

In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments It is a part of embodiments of the present disclosure, but not all embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present disclosure.

Display screens used in IoT products generally use SPI (Serial Peripheral Interface, Serial Peripheral Interface). This disclosure finds by analyzing the structure of each dual-screen display device in the prior art:

(1) Using a high-performance processor that supports two-way screen display, the software is easy to operate and the display effect is the most perfect, but the cost of the high-performance processor is relatively high.

(2) Dual processors are adopted, i.e. main control processor + coprocessor, as shown in Figure 1, the main control processor MCU (Microcontroller Unit, micro control unit), including LCD (Liquid Crystal Display, liquid crystal display) controller and the serial port, the LCD controller is connected to the first display LCD_1, the serial port is connected to the coprocessor, and the coprocessor includes a co-MCU and the second display LCD_2. To achieve the purpose of supporting two-way screen display, the display effect is still perfect, but the cost of the main processor + co-processor is relatively high, and the software complexity is relatively high, which affects the efficiency of the processor.

(3) Use the SPI of the processor itself, and then expand the screen display all the way, as shown in Figure 2, the processor MCU (Microcontroller Unit, micro control unit), including LCD (Liquid Crystal Display, liquid crystal display) controller and SPI, LCD The controller is connected to the first display screen LCD_1, and the SPI is connected to the second display screen LCD_2, which can also achieve the purpose of dual-screen display, but the software complexity is relatively high through the SPI expansion screen display interface, which affects the processor efficiency.

(4) The scheme of expanding the display screen by using other hardware interfaces of the processor will cause insufficient PINs (pins) of the processor, because the external PINs of the processor are inherently few.

Moreover, there is still a problem in the above-mentioned several existing dual-screen display devices. The use of two hardware interfaces will result in inconsistent display effects of the first display screen LCD_1 and the second display screen LCD_2, resulting in poor user experience.

In some embodiments, as shown in FIG. 3 , the present disclosure provides a dual-screen display device 300, which includes a control unit MCU 301, a first display screen LCD_1 302, and a second display screen LCD_2 303.

The control component MCU includes a liquid crystal display controller (LCD controller) and a general-purpose connection terminal (GPIO, General-purpose input/output);

The chip select output terminal LCD_CS of the liquid crystal display controller is connected to the chip select input terminal of the first display LCD_1, and the general connection terminal GPIO is connected to the chip select input terminal of the second display LCD_2, and the general connection terminal GPIO is LCD_CS2;

The data output terminal (SDA, Serial Data) of the liquid crystal display controller is connected to the data input terminal of the first display LCD_1, the data output terminal SDA of the liquid crystal display controller is connected to the data input terminal of the second display LCD_2, and the data input terminal of the liquid crystal display controller The clock output terminal (CLK, clock) is connected to the clock input terminal of the first display screen LCD_1, the clock output terminal CLK of the liquid crystal display controller is connected to the clock input terminal of the second display screen LCD_2, and the command output terminal SDC of the liquid crystal display controller is connected to the second display screen LCD_2. The command input terminal of the first display screen LCD_1 and the command output terminal SDC of the liquid crystal display controller are connected to the command input terminal of the second display screen LCD_2.

Compared with the prior art, since there is only one liquid crystal display controller in the single-screen processor, it can only perform single-screen display. Select the output terminal, by connecting the data output terminal, clock output terminal and command output terminal of the liquid crystal display controller to the first display screen and the second display screen respectively, it is equivalent to realizing a liquid crystal display through a common connection terminal. The control component of the controller expands to the effect of two liquid crystal display controllers, and only occupies one common connection terminal, which saves hardware pins, does not need to add additional components, saves hardware costs, and solves the problem based on the support list. The processor of the screen is difficult to realize the problem of dual-screen display. The operation is simple and convenient, and the user experience is improved.

In some embodiments, the control component MCU is configured to control the chip select output terminal LCD_CS to output the first chip select signal to the chip select input terminal of the first display screen LCD_1, and to control the common connection terminal LCD_CS2 to output the second chip select signal to The chip select input terminal of the second display screen LCD_2 realizes selecting one of the first display screen LCD_1 and the second display screen LCD_2 at the same time.

The control component MCU controls one of the first display screen LCD_1 and the second display screen LCD_2 at the same time by controlling the first chip selection signal and the second chip selection signal, and realizes time-sharing selection of the first display screen LCD_1 and the second display screen LCD_2. One of the two display screens LCD_2, so that the other display screen is not affected, and the purpose of displaying different data on two screens is realized.

In some embodiments, the control component MCU is configured to control the common connection terminal LCD_CS2 to output a high level to the chip select input terminal of the second display screen LCD_2 when the first display screen is selected, and control the chip select output terminal LCD_CS outputs a low level to the chip select input terminal of the first display LCD_1.

In some embodiments, when the chip select input terminal is at a low level, the display screen where the chip select input terminal is located is gated, and when the chip select input terminal is at a high level, the display screen where the chip select input terminal is located is not strobed.

In the strobe mode of the first display screen, it is necessary to first control the common connection terminal LCD_CS2 to output a high level to the chip select input terminal of the second display screen LCD_2. Even if there is data on the output terminal SDA, it will not affect the second display screen LCD_2. Then control the chip select output terminal LCD_CS to output a low level to the chip select input terminal of the first display LCD_1. At this time, the first display LCD_1 is strobed, and data can be written to the first display LCD_1 to display the interface.

In some embodiments, the control component MCU is configured to control the chip select output terminal LCD_CS to output a high level to the chip select input terminal of the first display screen LCD_1 when the second display screen is in the strobe mode, and control the common connection terminal LCD_CS2 outputs a low level to the chip select input terminal of the second display LCD_2.

In the strobe mode of the second display screen, it is necessary to control the chip select output terminal LCD_CS to output a high level to the chip select input terminal of the first display screen LCD_1. At this time, the first display screen LCD_1 is not strobed, and the LCD controller Even if there is data on the data output terminal SDA, it will not affect the first display screen LCD_1. Then control the common connection terminal LCD_CS2 to output a low level to the chip select input terminal of the second display LCD_2. At this time, the second display LCD_2 is strobed, and data can be written to the second display LCD_2 to display the interface.

In some embodiments, the dual-screen display device is a dual-screen POS (Point of sale, sales terminal), and the dual-screen POS includes two display screens, the first display screen is the main screen, facing the payee, configured as scanning code, Display product information, etc., the second display screen is a secondary screen, facing the payer, configured to display order information, etc.

Step 1: In the process of scanning the product code, select the strobe mode of the main screen, control the general connection terminal LCD_CS2 to output a high level to the chip select input terminal of the secondary screen LCD_2, do not select the secondary screen, and control the chip select output terminal LCD_CS to output low Connect the level to the chip select input terminal of the main screen LCD_1, select the main screen, after scanning the code, the main screen will display product information and price information.

Step 2: Select the secondary screen strobe mode, control the chip select output terminal LCD_CS to output high level to the chip select input terminal of the main screen LCD_1, do not select the main screen, and control the common connection terminal LCD_CS2 to output low level to the secondary screen LCD_2 Chip select input terminal, strobe the secondary screen, and display the order information on the secondary screen.

Step 3: Then select the main screen strobe mode, control the general connection terminal LCD_CS2 to output high level to the chip select input terminal of the secondary screen LCD_2, do not select the secondary screen, and control the chip select output terminal LCD_CS to output low level to the main screen LCD_1 chip select input terminal, select the main screen, scan the payment code, and display the payment information on the main screen.

Step 4: Finally select the sub-screen strobe mode, control the chip select output terminal LCD_CS to output a high level to the chip select input terminal of the main screen LCD_1, do not select the main screen, and control the common connection terminal LCD_CS2 to output a low level to the sub-screen LCD_2 The chip selection input terminal of the chip selects the secondary screen, and the payment result is displayed on the secondary screen. The payment result is payment success or payment failure.

In some embodiments, the present disclosure provides a dual-screen display method, as shown in FIG. 4 , the method is the dual-screen display device provided in the embodiment of the present disclosure, and the method flow of the dual-screen display mainly includes:

Step 401, acquire the gate pattern, wherein, the gate pattern includes the screen identification of the gate; and

Step 402, according to the strobe mode, control the chip select output terminal to output the first chip select signal to the chip select input terminal of the first display screen, and control the common connection terminal to output the second chip select signal to the chip select input terminal of the second display screen end.

In some implementations, the control component MCU controls one of the first display screen LCD_1 and the second display screen LCD_2 at the same time by controlling the first chip select signal and the second chip select signal, so as to realize time-sharing gating One display screen of the first display screen LCD_1 and the second display screen LCD_2, so that the other display screen is not affected, and the purpose of displaying different data on two screens is realized. The operation is simple and convenient, and the user experience is improved.

In some embodiments, the chip select output terminal is controlled to output the first chip select signal to the chip select input terminal of the first display screen, and the common connection terminal is controlled to output the second chip select signal to the second display screen according to the strobe mode. chip select input terminal, including: when the strobe mode is the first display screen strobe mode, control the general connection terminal to output high level to the chip select input terminal of the second display screen, and control the chip select output terminal to output low power Connect to the chip select input terminal of the first display screen.

In some embodiments, the chip select output terminal is controlled to output the first chip select signal to the chip select input terminal of the first display screen, and the common connection terminal is controlled to output the second chip select signal to the second display screen according to the strobe mode. chip select input terminal, including: when the strobe mode is the second display screen strobe mode, control the chip select output terminal to output high level to the chip select input terminal of the first display screen, and control the general connection terminal to output low power Ping to the chip select input terminal of the second display.

In some embodiments, after the strobe mode is obtained, according to the strobe mode, the chip select output terminal is controlled to output the first chip select signal to the chip select input terminal of the first display screen, and the common connection terminal is controlled to output the second chip select signal. Before the signal is sent to the chip selection input terminal of the second display screen, the dual-screen display method further includes: controlling the frequency of the serial bus of the liquid crystal display controller, and marking the corresponding frequency for the selected display screen.

In some embodiments, when the gating mode is the first display screen gating mode, the frequency of the serial bus controlling the liquid crystal display controller is the frequency of the first display screen; In the pass mode, the frequency of the serial bus controlling the liquid crystal display controller is the frequency of the second display screen.

In some embodiments, according to the strobe mode, the chip select output terminal is controlled to output the first chip select signal to the chip select input terminal of the first display screen, and the common connection terminal is controlled to output the second chip select signal to the second display screen. After the chip select input terminal, the dual-screen display method also includes: obtaining an operation instruction; according to the operation instruction, controlling the display screen corresponding to the selected display screen to write data and display the data.

In some embodiments, according to the operation instruction, after controlling the display screen corresponding to the gated display screen to write data and displaying the data, the dual-screen display method further includes: waiting for the display screen corresponding to the gated display screen to write The operation of data and displaying the data is completed, and the serial bus of the liquid crystal display controller is set to an idle state.

In some embodiments, after waiting for the gated display screen to identify the corresponding display screen to write data and display the data, before setting the serial bus of the liquid crystal display controller to an idle state, the dual-screen display method further includes: The chip select input terminal of the display screen corresponding to the display screen identification of the control strobe inputs a high level.

After the operation is finished, the chip select input terminal of the display screen corresponding to the display screen that controls the strobe enters a high level, and the display screen that controls the strobe this time is not strobed.

In some embodiments, before acquiring the strobe mode, the dual-screen display method further includes: determining that the state of the serial bus of the liquid crystal display controller is an idle state.

If the state of the serial bus of the liquid crystal display controller is not idle, then the double-screen display method in the present disclosure will not be executed, so as to avoid affecting the data transmission on the serial bus and avoid affecting the display screen identification of the ongoing control strobe The operation of writing data and displaying data on the corresponding display screen, avoiding the interference of misoperation on writing data and displaying data on the display screen.

In some embodiments, the chip select output terminal is controlled to output the first chip select signal to the chip select input terminal of the first display screen, and the common connection terminal is controlled to output the second chip select signal to the second display screen according to the strobe mode. After the chip select input terminal, the dual-screen display method also includes: writing initialization configuration parameters to the display screen corresponding to the display screen identification of the control strobe.

Realize sequential initial configuration of two display screens.

In some embodiments, before obtaining the strobe mode, the dual-screen display method also includes: initializing the liquid crystal display controller, and configuring each pin of the liquid crystal display controller as a chip select output terminal LCD_CS, a data output terminal SDA, and a clock output terminal CLK and the function of command output SDC.

In some implementations, after the display screen corresponding to the display screen identification of the control strobe is written into the initialization configuration parameters, the dual-screen display method further includes: inputting the chip select input terminal of the display screen corresponding to the display screen identification of the control strobe to input high level.

After the initialization configuration is completed, the chip select input terminal of the display screen corresponding to the display screen that controls the strobe enters a high level, and the display screen that controls the strobe this time is not strobed.

In some embodiments, as shown in FIG. 5 , it is a flow of the operation method displayed on two screens.

Determine whether the bus is idle, if so, determine which LCD to select, otherwise, end the process.

If LCD_1 is selected, configure the LCD controller SPI bus frequency to be LCD_1 frequency, set LCD_CS2 pin to output high level, configure LCD_CS pin to output low level, select LCD_1, call LCD_1 write interface, write commands and display data , wait for the end of the operation, and set the bus to an idle state.

If LCD_2 is selected, configure the LCD controller SPI bus frequency to LCD_2 frequency, configure the LCD_CS pin to output high level, set LCD_CS2 pin to output low level, select LCD_2, call LCD_2 write interface, write commands and display data , wait for the operation to end, set the LCD_CS2 pin to output high level, LCD_2 is not strobed, and set the bus to an idle state.

In some embodiments, as shown in FIG. 6 , it is a process flow of the initialization configuration method for dual-screen display.

Initialize the LCD controller and configure the controller pins as CS, SDA, SDC, and CLK functions.

Set the LCD_CS2 pin to output high level, configure CLK as the clock of LCD_1, configure the LCD_CS pin to output low level, and select LCD_1.

Initially configure LCD_1.

Set the LCD_CS pin to output high level, configure CLK as the clock of LCD_2, configure LCD_CS2 pin to output low level, and select LCD_2.

Initialize and configure LCD_2. After configuration, set LCD_CS2 to output high level.

It should be noted that in this article, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these No such actual relationship or order exists between entities or operations. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above descriptions are only specific implementation manners of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

A dual-screen display device comprising a control assembly, a first display screen and a second display screen;

The control assembly includes a liquid crystal display controller and a universal connection terminal;

The chip select output terminal of the liquid crystal display controller is connected to the chip select input terminal of the first display screen, and the common connection terminal is connected to the chip select input terminal of the second display screen; and

The data output end of the liquid crystal display controller is connected to the data input end of the first display screen, the data output end of the liquid crystal display controller is connected to the data input end of the second display screen, and the liquid crystal display The clock output end of the controller is connected to the clock input end of the first display screen, the clock output end of the liquid crystal display controller is connected to the clock input end of the second display screen, and the command of the liquid crystal display controller The output end is connected to the command input end of the first display screen, and the command output end of the liquid crystal display controller is connected to the command input end of the second display screen.
The dual-screen display device according to claim 1, wherein the control component is configured to control the chip select output terminal to output a first chip select signal to the chip select input terminal of the first display screen, and Controlling the common connection terminal to output a second chip select signal to the chip select input terminal of the second display screen, so as to select one of the first display screen and the second display screen at the same time.
The dual-screen display device according to claim 1 or 2, wherein the control component is configured to control the universal connection terminal to output a high level to the second display screen when the first display screen is in the gating mode the chip select input terminal of the first display screen, and control the chip select output terminal to output a low level to the chip select input terminal of the first display screen.
The dual-screen display device according to any one of claims 1 to 3, wherein the control component is configured to control the chip select output terminal to output a high level to The chip select input terminal of the first display screen, and controls the common connection terminal to output a low level to the chip select input terminal of the second display screen.
A dual-screen display method, which is applied to the dual-screen display device described in claim 1, said method comprising:

Obtaining a gating pattern, wherein the gating pattern includes a screen identification of the gating; and

According to the strobe mode, control the chip select output terminal to output a first chip select signal to the chip select input terminal of the first display screen, and control the common connection terminal to output a second chip select signal to all The chip select input terminal of the second display screen.
The dual-screen display method according to claim 5, wherein, according to the gate mode, controlling the chip select output terminal to output a first chip select signal to the chip select input terminal of the first display screen , and the step of controlling the common connection end to output a second chip select signal to the chip select input end of the second display screen includes:

When the strobe mode is the strobe mode of the first display screen, control the common connection terminal to output a high level to the chip select input terminal of the second display screen, and control the chip select output terminal to output Low level to the chip select input terminal of the first display screen.
The dual-screen display method according to claim 5 or 6, wherein, according to the gate mode, controlling the chip select output terminal to output a first chip select signal to the chip select of the first display screen The input terminal, and the steps of controlling the common connection terminal to output the second chip select signal to the chip select input terminal of the second display screen include:

When the gating mode is the gating mode of the second display screen, control the chip select output terminal to output a high level to the chip select input terminal of the first display screen, and control the output of the common connection terminal low level to the chip select input terminal of the second display screen.
The dual-screen display method according to any one of claims 5 to 7, wherein, after the acquisition of the strobe mode, according to the strobe mode, the chip select output terminal is controlled to output the first chip select signal to Before the chip select input terminal of the first display screen and controlling the common connection terminal to output a second chip select signal to the chip select input terminal of the second display screen, the method further includes:

Controlling the frequency of the serial bus of the liquid crystal display controller, marking the corresponding frequency for the gated display screen.
The dual-screen display method according to claim 8, wherein, according to the gate mode, controlling the chip select output terminal to output a first chip select signal to the chip select input terminal of the first display screen , and after controlling the common connection terminal to output a second chip select signal to the chip select input terminal of the second display screen, the method further includes:

obtain operating instructions; and

According to the operation instruction, control the display screen corresponding to the strobe to write data and display the data.
The dual-screen display method according to any one of claims 5 to 7, wherein, according to the gate mode, controlling the chip select output terminal to output the first chip select signal to the first display screen After the chip select input terminal and controlling the common connection terminal to output a second chip select signal to the chip select input terminal of the second display screen, the method further includes:

The display screen corresponding to the display screen identifier of the gate is controlled to write initialization configuration parameters.