CN114415996A - Double-screen display device and method - Google Patents
Double-screen display device and method Download PDFInfo
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- CN114415996A CN114415996A CN202111523165.3A CN202111523165A CN114415996A CN 114415996 A CN114415996 A CN 114415996A CN 202111523165 A CN202111523165 A CN 202111523165A CN 114415996 A CN114415996 A CN 114415996A
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- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
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Abstract
The application relates to a double-screen display device and a method, and relates to the technical field of double screens. The dual screen display device includes: the display device comprises a control assembly, a first display screen and a second display screen; the control assembly comprises a liquid crystal display controller and a universal connecting end; the chip selection output end of the liquid crystal display controller is connected with the chip selection input end of the first display screen, and the universal connecting end is connected with the chip selection input end of the second display screen; the data output end of the liquid crystal display controller is connected with the data input end of the first display screen and the data input end of the second display screen, the clock output end of the liquid crystal display controller is connected with the clock input end of the first display screen and the clock input end of the second display screen, and the command output end of the liquid crystal display controller is connected with the command input end of the first display screen and the command input end of the second display screen. The method and the device are used for solving the problem that the processor supporting the single screen is difficult to realize the double-screen display.
Description
Technical Field
The application relates to the technical field of double screens, in particular to a double-screen display device and method.
Background
In the application of the internet of things at present, the use scenes related to the double screens are many, for example, a double-screen POS (Point of sale), a double-screen bank cash register, an intelligent home and the like, the addition of the double screens brings convenience to interaction of multiple people, and meanwhile, the user experience is also improved.
However, in internet of things products, customers often use a relatively flat microprocessor as a main control processor based on cost consideration, and such a processor has the characteristics of relatively simple function and few hardware interfaces, and even if supporting LCD (Liquid Crystal Display) screen Display, only one screen Display is supported, two screen displays are not supported, and different contents are to be displayed. This creates a conflict between cost and user experience.
Disclosure of Invention
The application provides a double-screen display device and a double-screen display method, which are used for solving the problem that double-screen display is difficult to realize based on a processor supporting a single screen.
In a first aspect, an embodiment of the present application provides a dual-screen display device, which includes a control component, a first display screen, and a second display screen;
the control assembly comprises a liquid crystal display controller and a universal connecting end;
the chip selection output end of the liquid crystal display controller is connected with the chip selection input end of the first display screen, and the universal connecting end is connected with the chip selection input end of the second display screen;
the data output end of the liquid crystal display controller is connected with the data input end of the first display screen, the data output end of the liquid crystal display controller is connected with the data input end of the second display screen, the clock output end of the liquid crystal display controller is connected with the clock input end of the first display screen, the clock output end of the liquid crystal display controller is connected with the clock input end of the second display screen, the command output end of the liquid crystal display controller is connected with the command input end of the first display screen, and the command output end of the liquid crystal display controller is connected with the command input end of the second display screen.
Optionally, the control module is configured to control the chip selection output terminal to output a first chip selection signal to the chip selection input terminal of the first display screen, and control the universal connection terminal to output a second chip selection signal to the chip selection input terminal of the second display screen, so as to gate one of the first display screen and the second display screen at the same time.
Optionally, the control module is specifically configured to control the general connection end to output a high level to the chip selection input end of the second display screen and control the chip selection output end to output a low level to the chip selection input end of the first display screen in a first display screen gating mode.
Optionally, the control module is specifically 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 control the general connection terminal to output a low level to the chip select input terminal of the second display screen in a second display screen gating mode.
In a second aspect, an embodiment of the present application provides a dual-screen display method applied to the dual-screen display device in the first aspect, including:
acquiring a gating mode, wherein the gating mode comprises a gated display screen identifier;
and according to the gating mode, controlling the chip selection output end to output a first chip selection signal to the chip selection input end of the first display screen, and controlling the general connecting end to output a second chip selection signal to the chip selection input end of the second display screen.
Optionally, the 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 controlling the general connection terminal to output a second chip select signal to the chip select input terminal of the second display screen according to the gating mode includes:
and when the gating mode is a first display screen gating mode, controlling the general connecting end to output a high level to the chip selection input end of the second display screen, and controlling the chip selection output end to output a low level to the chip selection input end of the first display screen.
Optionally, the 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 controlling the general connection terminal to output a second chip select signal to the chip select input terminal of the second display screen according to the gating mode includes:
and when the gating mode is a second display screen gating mode, controlling the chip selection output end to output a high level to the chip selection input end of the first display screen, and controlling the general connecting end to output a low level to the chip selection input end of the second display screen.
Optionally, after the obtaining of the gating mode, before 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 controlling the general connection terminal to output a second chip select signal to the chip select input terminal of the second display screen according to the gating mode, the method further includes:
and controlling the frequency of a serial bus of the liquid crystal display controller to identify the corresponding frequency for the gated display screen.
Optionally, after 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 controlling the general connection terminal to output a second chip select signal to the chip select input terminal of the second display screen according to the gating mode, the method further includes:
acquiring an operation instruction;
and controlling the display screen corresponding to the gated display screen identification to write data and display the data according to the operation instruction.
Optionally, after 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 controlling the general connection terminal to output a second chip select signal to the chip select input terminal of the second display screen according to the gating mode, the method further includes:
and controlling the display screen corresponding to the gated display screen identification to write in the initial configuration parameters.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages: in the embodiment of the application, a double-screen display device is provided, which comprises a control component, a first display screen and a second display screen; the control assembly comprises a liquid crystal display controller and a universal connecting end; the chip selection output end of the liquid crystal display controller is connected with the chip selection input end of the first display screen, and the universal connecting end is connected with the chip selection input end of the second display screen; the data output end of the liquid crystal display controller is connected with the data input end of the first display screen, the data output end of the liquid crystal display controller is connected with the data input end of the second display screen, the clock output end of the liquid crystal display controller is connected with the clock input end of the first display screen, the clock output end of the liquid crystal display controller is connected with the clock input end of the second display screen, the command output end of the liquid crystal display controller is connected with the command input end of the first display screen, and the command output end of the liquid crystal display controller is connected with the command input end of the second display screen.
Compared with the prior art, only one liquid crystal display controller is arranged in the processor supporting the single screen, single-screen display can only be carried out, the chip selection output end of the second liquid crystal display controller is simulated through the universal connecting end in the control assembly, the data output end, the clock output end and the command output end of the liquid crystal display controller are respectively connected to the first display screen and the second display screen, equivalently, the control assembly with the liquid crystal display controller is realized through the universal connecting end, the effect of expanding the control assembly into the two liquid crystal display controllers is achieved, only one universal connecting end is occupied, the pins of hardware are saved, extra components do not need to be added, the hardware cost is saved, and the problem that double-screen display is difficult to realize based on the processor supporting the single screen is solved. The operation is simple and convenient, and the user experience is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a dual-panel display device in the prior art;
FIG. 2 is a schematic structural diagram of a dual-panel display device in the prior art;
FIG. 3 is a schematic structural diagram of a dual-panel display device according to an embodiment of the present application;
FIG. 4 is a schematic flow chart illustrating a method for dual-screen display according to an embodiment of the present application;
FIG. 5 is a schematic flow chart illustrating a method of operating a dual-screen display in an embodiment of the present application;
fig. 6 is a flowchart illustrating an initialization configuration method for dual-screen display according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The display screen used in the internet of things product generally uses SPI (Serial Peripheral Interface), and the inventor discovers, by analyzing the structure of each dual-screen display device in the prior art:
(1) the high-performance processor supporting two paths of screen display is adopted, software is easy to operate, the display effect is the most perfect, and the cost of the high-performance processor is higher.
(2) As shown in fig. 1, a main control processor MCU (micro control Unit) includes an LCD (Liquid Crystal Display) controller and a serial port, the LCD controller is connected to a first Display screen LCD _1, the serial port is connected to a coprocessor, and the coprocessor includes a coprocessor MCU and a second Display screen LCD _ 2. The purpose of supporting two paths of screen display is achieved, the display effect is perfect, however, the cost of the main processor and the coprocessor is high, the software complexity is high, and the efficiency of the processor is influenced.
(3) Adopt the SPI of treater self, expand the screen Display of the same way again, as shown in fig. 2, treater MCU (Microcontroller Unit, little the control Unit), including LCD (Liquid Crystal Display, LCD) controller and SPI, first Display screen LCD _1 is connected to the LCD controller, second Display screen LCD _2 is connected to SPI, also can reach the double screen Display purpose, but through SPI extension screen Display interface, the software complexity is higher, influences treater efficiency.
(4) The solution of extending the display screen with other hardware interfaces of the processor may result in an insufficient PIN (PIN) for the processor, since the external PIN of the processor is inherently low.
Moreover, the existing dual-screen display devices have a problem that the display effects of the first display screen LCD _1 and the second display screen LCD _2 are inconsistent and the user experience is poor due to the adoption of two hardware interfaces.
In the embodiment of the application, the double-screen display device comprises a control component MCU, a first display screen LCD _1 and a second display screen LCD _ 2.
The control component MCU comprises a liquid crystal display controller (LCD controller) and a General-purpose input/output (GPIO);
a chip selection output end LCD _ CS of the liquid crystal display controller is connected with a chip selection input end of a first display screen LCD _1, a general purpose connection end GPIO is connected with a chip selection input end of a second display screen LCD _2, and the general purpose connection end GPIO is LCD _ CS 2;
the Data output end (SDA) of the liquid crystal display controller is connected with the Data input end of the first display screen LCD _1, the Data output end SDA of the liquid crystal display controller is connected with the Data input end of the second display screen LCD _2, the clock output end (CLK, clock) of the liquid crystal display controller is connected with the clock input end of the first display screen LCD _1, the clock output end CLK of the liquid crystal display controller is connected with the clock input end of the second display screen LCD _2, the command output end SDC of the liquid crystal display controller is connected with the command input end of the first display screen LCD _1, and the command output end SDC of the liquid crystal display controller is connected with the command input end of the second display screen LCD _ 2.
Compared with the prior art, only one liquid crystal display controller is arranged in the processor supporting the single screen, single-screen display can only be carried out, the chip selection output end of the second liquid crystal display controller is simulated through the universal connecting end in the control assembly, the data output end, the clock output end and the command output end of the liquid crystal display controller are respectively connected to the first display screen and the second display screen, equivalently, the control assembly with the liquid crystal display controller is realized through the universal connecting end, the effect of expanding the control assembly into the two liquid crystal display controllers is achieved, only one universal connecting end is occupied, the pins of hardware are saved, extra components do not need to be added, the hardware cost is saved, and the problem that double-screen display is difficult to realize based on the processor supporting the single screen is solved. The operation is simple and convenient, and the user experience is improved.
In a specific embodiment, the control unit MCU is configured to control the chip select output terminal LCD _ CS to output a first chip select signal to the chip select input terminal of the first display screen LCD _1, and control the general connection terminal LCD _ CS2 to output a second chip select signal to the chip select input terminal of the second display screen LCD _2, so as to gate one of the first display screen LCD _1 and the second display screen LCD _2 at the same time.
The control component MCU controls the first chip selection signal and the second chip selection signal to gate one of the first display screen LCD _1 and the second display screen LCD _2 at the same time and gate one of the first display screen LCD _1 and the second display screen LCD _2 in a time-sharing manner, so that the other display screen is not influenced, and the purpose of displaying different data by two screens is realized.
In a specific embodiment, the control unit MCU is specifically configured to control the universal connection terminal LCD _ CS2 to output a high level to the chip selection input terminal of the second display screen LCD _2 and control the chip selection output terminal LCD _ CS to output a low level to the chip selection input terminal of the first display screen LCD _1 in the first display screen gating mode.
When the chip selection input end is at a low level, the display screen where the chip selection input end is located is gated, and when the chip selection input end is at a high level, the display screen where the chip selection input end is located is not gated.
In the first display screen gating mode, the general-purpose connection end LCD _ CS2 needs to be controlled to output a high level to the chip selection input end of the second display screen LCD _2, at this time, the second display screen LCD _2 is not gated, and even if data exists at the data output end SDA of the liquid crystal display controller, the second display screen LCD _2 is not affected. And then controlling the chip selection output end LCD _ CS to output a low level to the chip selection input end of the first display screen LCD _1, and at the moment, gating the first display screen LCD _1 to write data to the first display screen LCD _1 so as to display an interface.
In a specific embodiment, the control unit MCU is specifically 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 and control the universal connection terminal LCD _ CS2 to output a low level to the chip select input terminal of the second display screen LCD _2 in the second display screen gating mode.
When the chip selection input end is at a low level, the display screen where the chip selection input end is located is gated, and when the chip selection input end is at a high level, the display screen where the chip selection input end is located is not gated.
In the second display screen gating mode, the chip selection output end LCD _ CS needs to be controlled to output a high level to the chip selection input end of the first display screen LCD _1, at this time, the first display screen LCD _1 is not gated, and even if data exists on the data output end SDA of the liquid crystal display controller, the first display screen LCD _1 is not affected. And then controlling the general connection end LCD _ CS2 to output a low level to a chip selection input end of the second display screen LCD _2, and at the moment, gating the second display screen LCD _2, writing data to the second display screen LCD _2 and displaying an interface.
For example, the dual-screen display device is a dual-screen POS (Point of sale terminal), the dual-screen POS includes two display screens, the first display screen is a main screen facing to a payee for scanning a code, displaying commodity information, and the like, and the second display screen is a sub-screen facing to a payer for displaying order information, and the like.
The first step is as follows: in the process of scanning the commodity codes, a main screen gating mode is selected, the general connecting end LCD _ CS2 is controlled to output high level to the chip selection input end of the auxiliary screen LCD _2, the auxiliary screen is not gated, the chip selection output end LCD _ CS is controlled to output low level to the chip selection input end of the main screen LCD _1, the main screen is gated, and after code scanning is finished, the main screen displays commodity information and price information.
The second step is that: and selecting the auxiliary screen gating mode, controlling the chip selection output end LCD _ CS to output a high level to the chip selection input end of the main screen LCD _1, not gating the main screen, controlling the general connection end LCD _ CS2 to output a low level to the chip selection input end of the auxiliary screen LCD _2, gating the auxiliary screen, and displaying order information on the auxiliary screen.
The third step: and then selecting a main screen gating mode, controlling the universal connection end LCD _ CS2 to output a high level to the chip selection input end of the auxiliary screen LCD _2 without gating the auxiliary screen, controlling the chip selection output end LCD _ CS to output a low level to the chip selection input end of the main screen LCD _1, gating the main screen, scanning the payment code, and displaying the payment information on the main screen.
The fourth step: and finally, selecting an auxiliary screen gating mode, controlling the chip selection output end LCD _ CS to output a high level to the chip selection input end of the main screen LCD _1 without gating the main screen, controlling the general connection end LCD _ CS2 to output a low level to the chip selection input end of the auxiliary screen LCD _2, gating the auxiliary screen, and displaying a payment result on the auxiliary screen, wherein the payment result is payment success or payment failure.
In the embodiment of the present application, a dual-screen display method is provided, as shown in fig. 4, and is applied to a dual-screen display device provided in the embodiment of the present application, where the dual-screen display method mainly includes:
The control component MCU controls the first chip selection signal and the second chip selection signal to gate one of the first display screen LCD _1 and the second display screen LCD _2 at the same time and gate one of the first display screen LCD _1 and the second display screen LCD _2 in a time-sharing manner, so that the other display screen is not influenced, and the purpose of displaying different data by two screens is realized. The operation is simple and convenient, and the user experience is improved.
In one embodiment, according to the gating 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 controlling the general connection terminal to output a second chip select signal to the chip select input terminal of the second display screen includes: and when the gating mode is the first display screen gating mode, controlling the general connecting end to output a high level to the chip selection input end of the second display screen, and controlling the chip selection output end to output a low level to the chip selection input end of the first display screen.
When the chip selection input end is at a low level, the display screen where the chip selection input end is located is gated, and when the chip selection input end is at a high level, the display screen where the chip selection input end is located is not gated.
In the first display screen gating mode, the general-purpose connection end LCD _ CS2 needs to be controlled to output a high level to the chip selection input end of the second display screen LCD _2, at this time, the second display screen LCD _2 is not gated, and even if data exists at the data output end SDA of the liquid crystal display controller, the second display screen LCD _2 is not affected. And then controlling the chip selection output end LCD _ CS to output a low level to the chip selection input end of the first display screen LCD _1, and at the moment, gating the first display screen LCD _1 to write data to the first display screen LCD _1 so as to display an interface.
In one embodiment, according to the gating 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 controlling the general connection terminal to output a second chip select signal to the chip select input terminal of the second display screen includes: and when the gating mode is the second display screen gating mode, controlling the chip selection output end to output a high level to the chip selection input end of the first display screen, and controlling the general connection end to output a low level to the chip selection input end of the second display screen.
When the chip selection input end is at a low level, the display screen where the chip selection input end is located is gated, and when the chip selection input end is at a high level, the display screen where the chip selection input end is located is not gated.
In the second display screen gating mode, the chip selection output end LCD _ CS needs to be controlled to output a high level to the chip selection input end of the first display screen LCD _1, at this time, the first display screen LCD _1 is not gated, and even if data exists on the data output end SDA of the liquid crystal display controller, the first display screen LCD _1 is not affected. And then controlling the general connection end LCD _ CS2 to output a low level to a chip selection input end of the second display screen LCD _2, and at the moment, gating the second display screen LCD _2, writing data to the second display screen LCD _2 and displaying an interface.
For example, the dual-screen display device is a dual-screen POS (Point of sale terminal), the dual-screen POS includes two display screens, the first display screen is a main screen facing to a payee for scanning a code, displaying commodity information, and the like, and the second display screen is a sub-screen facing to a payer for displaying order information, and the like.
The first step is as follows: in the process of scanning the commodity codes, a main screen gating mode is selected, the general connecting end LCD _ CS2 is controlled to output high level to the chip selection input end of the auxiliary screen LCD _2, the auxiliary screen is not gated, the chip selection output end LCD _ CS is controlled to output low level to the chip selection input end of the main screen LCD _1, the main screen is gated, and after code scanning is finished, the main screen displays commodity information and price information.
The second step is that: and selecting the auxiliary screen gating mode, controlling the chip selection output end LCD _ CS to output a high level to the chip selection input end of the main screen LCD _1, not gating the main screen, controlling the general connection end LCD _ CS2 to output a low level to the chip selection input end of the auxiliary screen LCD _2, gating the auxiliary screen, and displaying order information on the auxiliary screen.
The third step: and then selecting a main screen gating mode, controlling the universal connection end LCD _ CS2 to output a high level to the chip selection input end of the auxiliary screen LCD _2 without gating the auxiliary screen, controlling the chip selection output end LCD _ CS to output a low level to the chip selection input end of the main screen LCD _1, gating the main screen, scanning the payment code, and displaying the payment information on the main screen.
The fourth step: and finally, selecting an auxiliary screen gating mode, controlling the chip selection output end LCD _ CS to output a high level to the chip selection input end of the main screen LCD _1 without gating the main screen, controlling the general connection end LCD _ CS2 to output a low level to the chip selection input end of the auxiliary screen LCD _2, gating the auxiliary screen, and displaying a payment result on the auxiliary screen, wherein the payment result is payment success or payment failure.
In a specific embodiment, after the obtaining of the gating mode, according to the gating mode, the dual-screen display method further includes, before controlling the chip select output terminal to output the first chip select signal to the chip select input terminal of the first display screen and controlling the general connection terminal to output the second chip select signal to the chip select input terminal of the second display screen: and controlling the frequency of a serial bus of the liquid crystal display controller to identify the corresponding frequency for the gated display screen.
For example: when the gating mode is the first display screen gating mode, controlling the frequency of a serial bus of the liquid crystal display controller to be the frequency of the first display screen; and when the gating mode is the second display screen gating mode, controlling the frequency of the serial bus of the liquid crystal display controller to be the frequency of the second display screen.
In one embodiment, after controlling the chip select output terminal to output the first chip select signal to the chip select input terminal of the first display screen and controlling the general connection terminal to output the second chip select signal to the chip select input terminal of the second display screen according to the gating mode, the dual-screen display method further includes: acquiring an operation instruction; and controlling the display screen corresponding to the gated display screen identification to write data and display the data according to the operation instruction.
In a specific embodiment, after controlling the display screen corresponding to the gated display screen identifier to write data and display the data according to the operation instruction, the dual-screen display method further includes: and setting the serial bus of the liquid crystal display controller to be in an idle state after the operation of writing data into the display screen corresponding to the gated display screen identification and displaying the data is finished.
In a specific embodiment, after the operation of writing data into the display screen corresponding to the gated display screen identifier and displaying the data is completed, and before the serial bus of the liquid crystal display controller is set to the idle state, the dual-screen display method further includes: and controlling the chip selection input end of the display screen corresponding to the gated display screen identification to input high level.
And after the operation is finished, controlling the chip selection input end of the display screen corresponding to the gated display screen identification to input high level, and controlling the display screen gated at this time not to be gated.
In a specific embodiment, before acquiring the gating mode, the dual-screen display method further includes: and determining the state of the serial bus of the liquid crystal display controller to be an idle state.
If the state of the serial bus of the liquid crystal display controller is not in an idle state, the double-screen display method in the application is not executed, the data transmission on the serial bus is prevented from being influenced, the operation that the display screen corresponding to the display screen identification which is in control gating is influenced to write in data and display the data is prevented from being influenced, and the interference of misoperation on the data writing in and display of the display screen is prevented.
In one embodiment, after controlling the chip select output terminal to output the first chip select signal to the chip select input terminal of the first display screen and controlling the general connection terminal to output the second chip select signal to the chip select input terminal of the second display screen according to the gating mode, the dual-screen display method further includes: and controlling the display screen corresponding to the gated display screen identification to write in the initial configuration parameters.
And sequential initialization configuration of the two display screens is realized.
In a specific embodiment, before acquiring the gating mode, the dual-screen display method further includes: initializing the liquid crystal display controller, and configuring each pin of the liquid crystal display controller to be the functions of a chip selection output end LCD _ CS, a data output end SDA, a clock output end CLK and a command output end SDC.
In a specific embodiment, after the display screen corresponding to the gated display screen identifier is written with the initialization configuration parameter, the dual-screen display method further includes: and controlling the chip selection input end of the display screen corresponding to the gated display screen identification to input high level.
And after the initialization configuration is finished, controlling the chip selection input end of the display screen corresponding to the gated display screen identification to input high level, and controlling the display screen gated at this time not to be gated.
In one embodiment, as shown in fig. 5, a flow of an operation method of the dual-screen display is shown.
And judging whether the bus is idle, if so, judging which path of LCD is selected, and otherwise, ending the process.
If the LCD _1 is selected, configuring the SPI bus frequency of the LCD controller to be the LCD _1 frequency, setting the pin of the LCD _ CS2 to be output high level, configuring the pin of the LCD _ CS to be output low level, gating the LCD _1, calling the writing interface of the LCD _1, writing commands and displaying data, waiting for the end of operation, and setting the bus to be in an idle state.
If the LCD _2 is selected, configuring the SPI bus frequency of the LCD controller to be the LCD _2 frequency, configuring the pin of the LCD _ CS to be the output high level, setting the pin of the LCD _ CS2 to be the output low level, gating the LCD _2, calling the writing interface of the LCD _2, writing a command and displaying data, waiting for the end of operation, setting the pin of the LCD _ CS2 to be the output high level, not gating the LCD _2, and setting the bus to be in an idle state.
In a specific embodiment, as shown in fig. 6, a flow of an initialization configuration method for dual-screen display is provided.
And initializing the LCD controller, and configuring controller pins as CS, SDA, SDC and CLK functions.
The pin LCD _ CS2 is set to output high level, CLK is configured to be the clock of LCD _1, the pin LCD _ CS is configured to output low level, and LCD _1 is gated.
And initializing and configuring the LCD _ 1.
The pin LCD _ CS is set to output high level, CLK is configured to be the clock of LCD _2, the pin LCD _ CS2 is configured to output low level, and LCD _2 is gated.
And initializing and configuring the LCD _2, and setting the LCD _ CS2 to output high level after the configuration is finished.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to 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 (10)
1. A double-screen display device is characterized by comprising a control component, a first display screen and a second display screen;
the control assembly comprises a liquid crystal display controller and a universal connecting end;
the chip selection output end of the liquid crystal display controller is connected with the chip selection input end of the first display screen, and the universal connecting end is connected with the chip selection input end of the second display screen;
the data output end of the liquid crystal display controller is connected with the data input end of the first display screen, the data output end of the liquid crystal display controller is connected with the data input end of the second display screen, the clock output end of the liquid crystal display controller is connected with the clock input end of the first display screen, the clock output end of the liquid crystal display controller is connected with the clock input end of the second display screen, the command output end of the liquid crystal display controller is connected with the command input end of the first display screen, and the command output end of the liquid crystal display controller is connected with the command input end of the second display screen.
2. The dual-screen display device of claim 1, wherein the control component is configured to control the chip select output to output a first chip select signal to the chip select input of the first display screen, and control the universal connection to output a second chip select signal to the chip select input of the second display screen, so as to enable one of the first display screen and the second display screen to be gated at the same time.
3. The dual-screen display device of claim 2, wherein the control component is specifically configured to control the universal 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 a low level to the chip select input terminal of the first display screen in a first display screen gating mode.
4. The dual-screen display device of claim 2, wherein the control component is specifically 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 control the universal connection terminal to output a low level to the chip select input terminal of the second display screen in a second display screen gating mode.
5. A dual-screen display method applied to the dual-screen display device of claim 1, comprising:
acquiring a gating mode, wherein the gating mode comprises a gated display screen identifier;
and according to the gating mode, controlling the chip selection output end to output a first chip selection signal to the chip selection input end of the first display screen, and controlling the general connecting end to output a second chip selection signal to the chip selection input end of the second display screen.
6. The dual-screen display method of claim 5, wherein the controlling the chip select output to output a first chip select signal to the chip select input of the first display screen and the controlling the general purpose connection to output a second chip select signal to the chip select input of the second display screen according to the gating mode comprises:
and when the gating mode is a first display screen gating mode, controlling the general connecting end to output a high level to the chip selection input end of the second display screen, and controlling the chip selection output end to output a low level to the chip selection input end of the first display screen.
7. The dual-screen display method of claim 5, wherein the controlling the chip select output to output a first chip select signal to the chip select input of the first display screen and the controlling the general purpose connection to output a second chip select signal to the chip select input of the second display screen according to the gating mode comprises:
and when the gating mode is a second display screen gating mode, controlling the chip selection output end to output a high level to the chip selection input end of the first display screen, and controlling the general connecting end to output a low level to the chip selection input end of the second display screen.
8. The dual screen display method of any one of claims 5 to 7, wherein after the obtaining of the gating mode, the controlling of the chip select output to output a first chip select signal to the chip select input of the first display screen and the controlling of the general purpose connection to output a second chip select signal to the chip select input of the second display screen according to the gating mode further comprises:
and controlling the frequency of a serial bus of the liquid crystal display controller to identify the corresponding frequency for the gated display screen.
9. The dual-screen display method of claim 8, wherein after controlling the chip select output to output a first chip select signal to the chip select input of the first display screen and controlling the general purpose connection to output a second chip select signal to the chip select input of the second display screen according to the strobe mode, the method further comprises:
acquiring an operation instruction;
and controlling the display screen corresponding to the gated display screen identification to write data and display the data according to the operation instruction.
10. The dual screen display method of any one of claims 5 to 7, wherein after controlling the chip select output to output a first chip select signal to the chip select input of the first display screen and controlling the universal connection to output a second chip select signal to the chip select input of the second display screen according to the gating mode, the method further comprises:
and controlling the display screen corresponding to the gated display screen identification to write in the initial configuration parameters.
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|---|---|---|---|
| CN202111523165.3A CN114415996A (en) | 2021-12-13 | 2021-12-13 | Double-screen display device and method |
| PCT/CN2022/099846 WO2023109058A1 (en) | 2021-12-13 | 2022-06-20 | Double-screen display device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111523165.3A CN114415996A (en) | 2021-12-13 | 2021-12-13 | Double-screen display device and method |
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| CN114415996A true CN114415996A (en) | 2022-04-29 |
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Cited By (1)
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| WO2023109058A1 (en) * | 2021-12-13 | 2023-06-22 | 西安广和通无线软件有限公司 | Double-screen display device and method |
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