CN201196732Y - Function-changing type liquid crystal key - Google Patents

Abstract

The utility model discloses a become functional formula liquid crystal button, including liquid crystal key unit to and host computer and next machine. The upper computer provides a program for modifying the key symbols displayed by the liquid crystal key unit. The lower computer comprises a central processing unit, a memory and a driver. The memory is used for storing symbol data and key functions displayed by the liquid crystal key unit; the central processing unit is used for controlling and processing the storage information of the memory; the driver is controlled by the central processing unit to realize that the liquid crystal key unit displays key symbols on each liquid crystal screen. In addition, various programs for realizing a certain function are arranged in the upper computer or the lower computer, and each key in the liquid crystal key unit corresponds to the program for realizing the certain function one by one according to the requirement. The utility model discloses a liquid crystal button can change the service function of liquid crystal button as required, changes the display symbol of corresponding button simultaneously to full play liquid crystal display's function has stronger expansibility.

Description

Variable function LCD button

technical field

The invention relates to a button, more specifically, to a liquid crystal button whose function can be changed by configuring an upper computer or a lower computer.

Background technique

The special function controller is mainly used to deal with special situations and when users need to manually intervene in broadcasting, and provides a fast and effective means for broadcasting personnel to quickly eliminate system failures and changes in scheduled program lists due to changes in broadcasting programs . At present, among the similar products of other companies in the market, buttons and LCD are mostly used to realize the control of special function controllers, such as the same type of controller produced by Shenzhen Company, whose front panel is shown in Figure 2. The design of using the LCD to represent the button operation can intuitively reflect the function of each button.

The problem is that these LCD buttons often have a single function during use, that is to say, each time a button is pressed, a certain function is correspondingly realized. This can completely replace expensive LCD keys with ordinary keys. Therefore, it is necessary to expand the scope of use for the liquid crystal display function of the liquid crystal key.

Contents of the invention

Aiming at the problem of solidified liquid crystal key functions in the prior art, the utility model provides a liquid crystal key module unit in which not only the display symbols of the liquid crystal keys are variable but also the functions of each key are variable. The purpose of the invention is to solve the problem of single function and poor expandability of the existing liquid crystal buttons, so as to achieve the purpose of making the best use of everything.

In order to solve the above problems, the utility model designs a function-changing liquid crystal button, which includes a liquid crystal button unit, and a host computer and a slave computer connected with communication and interactive information. Wherein, the host computer provides a program for modifying the key symbol displayed by the LCD key unit. The lower computer includes a central processing unit, a memory connected to communicate with the central processing unit and a driver, and the driver is used to connect and drive the display of the LCD key unit. Specifically explain the functions of each unit in the lower computer: memory, for storing the symbol data and key functions displayed by the liquid crystal key unit; central processing unit, for controlling and processing the memory storage information; driver, controlled by the central processing unit Realize that the liquid crystal key unit displays key symbols on each liquid crystal screen. In addition, various programs for realizing a certain function are set in the upper computer or the lower computer, and each key in the LCD key unit corresponds to the program for realizing a certain function according to needs.

In a preferred mode, the above-mentioned memory is selected from E ² PROM, the central processing unit is selected from a single-chip microcomputer or an ARM control chip; the driver is implemented from FPGA and CPLD.

The utility model can not only effectively realize the characteristics of the original controller's identification button function, but also realize the display of different languages, different contents, or different graphics according to different users. Therefore, the use of the buttons of the controller can be more flexible, eclectic, and the application range is wider, which can meet the needs of users of different nationalities and languages, more clearly reflect the functions of each button, and effectively reduce The problem of misoperation is improved, and the stability of the control system is improved. The utility model selects special keys including LCD liquid crystal display to cooperate with special devices, so that customers can change the functions of keys and the display content of LCD through the special software of the host computer according to their own needs, which solves the problem that other controllers cannot realize multiple functions. The disadvantages of this kind of control can enhance the flexibility of the controller, which can be more beneficial to the user's operation, and greatly avoid the impact of emergencies.

In a word, the liquid crystal key designed by the utility model can change the use function of the liquid crystal key as required, and change the display symbol of the corresponding key at the same time, thereby fully exerting the function of the liquid crystal display and having strong expansibility.

Description of drawings

Fig. 1 is the functional schematic diagram of the utility model variable-function liquid crystal button;

FIG. 2 is a schematic diagram of a panel display structure of a liquid crystal key in the prior art.

Detailed ways

The utility model is a function-changing liquid crystal key, comprising a liquid crystal key unit (the Key&LCD unit in Fig. 1 ) and a host computer and a lower computer connected with communication and interactive information. Referring to Fig. 1, the PC is the upper computer, which provides a program for modifying the key symbols displayed on the LCD key unit. In the figure, the lower computer includes a central processing unit CPU, a memory and a driver (FPGA) connected and communicated with the CPU. Wherein, the memory is used to store symbol data displayed by the LCD key unit; the central processing unit is used to control the memory to store information; the driver is controlled by the central processing unit to realize the display of key symbols on each LCD screen by the liquid crystal key unit. In the figure, the communication between the upper computer and the lower computer uses RS232/422 bus.

In a preferred mode, the memory is selected from E ² PROM; the CPU is selected from a single-chip microcomputer or an ARM control chip; and the driver is implemented using FPGA in the figure, or CPLD.

In order to realize the change of key functions, the upper computer or the lower computer is provided with various programs to realize a certain function. These programs are artificially compiled according to the needs, and can be used for the control of various peripherals, and can also be used to realize a certain function of the host computer. And at this moment, it is only necessary to correspond each button with a certain function program actually required by the liquid crystal button module unit provided by the utility model, and when a button is pressed, the corresponding program is called, and the real-time response program is completed The corresponding function is enough.

If you need to change the symbol displayed by a certain button, you only need to use the program in the upper computer to modify the button symbol displayed by the LCD button unit, and store the LCD display symbol of the corresponding button in the memory through the CPU in the lower computer; Next, the symbol information in the memory is called, and the driver drives the liquid crystal screen of the liquid crystal button to display the symbol, so as to achieve the purpose of changing the symbol of the liquid crystal. Correspondingly, the function program corresponding to a certain key is set as one-to-one correspondence in the upper computer or the lower computer, so that when the button is pressed, the required program is called to complete the required function, and the variable frequency is achieved. The purpose of the key function.

The utility model selects special buttons, including LCD liquid crystal display, and uses FPGA to provide dynamic character refresh for the button LCD, so that customers can change the display content of the LCD on the button through the host computer according to their own needs, and the displayed content can be based on The different settings of the user can realize the display of different language types, which solves the problem of unclear identification of other controllers or the inconvenience of changing the identification, which can be more conducive to the operation of the user and greatly avoids the occurrence of misoperation. The influence of misoperation due to confusion of identification is avoided.

Wherein, the program for modifying the key symbol displayed by the LCD key unit in the host computer is the TrueType software in the prior art. The working process is as follows: first, the user opens the TrueType software according to the need, selects the corresponding serial number according to the position of the LCD to be changed, and the user defines the content to be displayed on each LCD. The defined content can be any graphics such as text and patterns, and then according to the system In the process of the flow chart, the CPU sends the newly set display content to the FPGA (as shown in Figure 1), and at the same time stores the displayed characters for use after power failure, and then the FPGA sends different data to each of the different LCD addresses , to achieve effective control of the specific display content of the LCD. The FPGA part works as shown in the FPGA flow chart, which is divided into three parts: input display data, temporarily store display data to corresponding positions according to different addresses of LCD, and output display data to LCD. The display content can be set by the upper computer according to the user's needs, so that it can be adjusted at any time according to the needs.

The process of button function change is as follows: first, the user conducts secondary development on the controller (including LCD buttons) according to the needs. Write the content after the secondary definition into the main control chip of the controller, and the main control chip will reset the display content of the LCD and the various functions of the keys according to the user's definition, and store the settings in the relevant storage device , when the user writes the defined content into the main control chip of the controller, he can separate from the PC and control the controlled instrument independently. The key operation controls the controlled instrument accordingly. During the display process, the main control device sends the display content of each LCD interface to the display control device according to the user's settings, and the display control device drives and displays each LCD display interface, and the LCD completes the display process.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. The equivalent replacement or change of the new technical solution and the concept of the utility model shall be covered by the protection scope of the utility model.

Claims (2)

1. A function-changing liquid crystal button, comprising a liquid crystal button unit, characterized in that it also includes a host computer and a lower computer connected to the communication; the host computer provides a program for modifying the key symbols displayed by the liquid crystal button unit; The lower computer includes a central processing unit, a memory connected to the central processing unit and a driver, and the driver is connected to the liquid crystal key unit; in, The memory is used to store symbol data and key functions displayed by the liquid crystal key unit; The central processing unit is configured to control the memory to store information; The driver is controlled by the central processing unit to realize that the liquid crystal key unit displays key symbols on each liquid crystal screen; also, The upper computer or the lower computer is provided with various programs for realizing a certain function, and each key in the liquid crystal key unit corresponds to the program for realizing a certain function. 2. The function-changing liquid crystal button according to claim 1, wherein the memory is E ² PROM, the central processing unit is a single-chip microcomputer or an ARM control chip; the driver is implemented by FPGA or CPLD.

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