CN103136065A - Anti-interference self-recovery method for general liquid crystal display (LCD) module - Google Patents

Abstract

The invention discloses an anti-interference self-recovery method for a general liquid crystal display (LCD) module. The method includes the steps of selecting a RAM (random access memory) buffer which is used for saving display data of the general LCD module and setting the size of the buffer according to display resolution of the general LCD module; writing in the data of the general LCD module and synchronously saving the data into the RAM buffer; in the real-time displaying process of the general LCD module, reading the real-time display data of the general LCD module and then comparing the real-time display data with that of the RAM buffer; if the data are different, writing the data of the RAM buffer in the general LCD module and update the same synchronously; and in the real-time displaying process, repeating the initialization of the general LCD module.

Description

A kind of anti-interference self-recovery method of general Liquid Crystal Module

Technical field

The invention belongs to the Computer display technical field, particularly a kind of anti-interference self-recovery method of general Liquid Crystal Module.

Background technology

Along with the development of computer technology and user to use the interface require increasing, general Liquid Crystal Module is as a kind of display device, its unrivaled convenience, superiority have obtained maximum application, there is at present the product more than 80% all to use general Liquid Crystal Module as display device, the completing user interactive interface.Interface classification according to Liquid Crystal Module mainly contains two large classes, and a class is analog interface, and a class is digital interface.Because the complicacy of controlling with Liquid Crystal Module of greatly developing of computer technology constantly increases, digital interface has become main flow.

Unavoidablely be, in the communicating by letter of computing machine and general Liquid Crystal Module, due to the demand that dynamically shows or show in real time, at a high speed, a large amount of data stream exchanges becomes inevitable, in this process, if owing to there being defective on hardware design, perhaps outside when having high-intensity magnetic field, large interference source, the signal of high speed processing can be disturbed, error code occurs, gently cause liquid crystal display mess code to occur, flower screen, heavy directly shield in vain, blank screen.More seriously, control the computing machine of data stream exchange and do not know that Liquid Crystal Module is interfered, and mistake occurs, whether computing machine None-identified Liquid Crystal Module is normal in other words, still communicate according to normal logical and Liquid Crystal Module, in this case, only can make situation become more poor and more poor.

Summary of the invention

The anti-interference self-recovery method that the purpose of this invention is to provide a kind of general Liquid Crystal Module.

Technical scheme of the present invention is that a kind of anti-interference self-recovery method of general Liquid Crystal Module comprises the following steps:

Step 1 is selected a block RAM buffer zone, and the size of this buffer zone depends on the display resolution of described general Liquid Crystal Module, and this buffer zone is in order to preserve the demonstration data of described general Liquid Crystal Module;

Step 2 writes the data of described general Liquid Crystal Module, synchronously is saved in described ram buffer;

Step 3, in the real-time procedure for displaying of described general Liquid Crystal Module, the real-time demonstration data and the described ram buffer that read described general Liquid Crystal Module compare, in case find that data are different, synchronously write renewal with described ram buffer data to described general Liquid Crystal Module;

Step 4 in real-time procedure for displaying, repeats the described general Liquid Crystal Module of initialization.

For the T6963 controller, display resolution is the general Liquid Crystal Module of 240X128,

At first, the definition ram buffer comprises:

Calculate buffer size=240X128/8;

By computational length definition buffer zone,

Secondly, show that data write ram buffer, comprising:

Obtain general Liquid Crystal Module actual displayed position (x, y);

Calculate corresponding buffer zone address=(y*240/8)+x;

Write the demonstration data to general Liquid Crystal Module, synchronous save data again, compares the ram buffer data to the buffer zone corresponding address, comprising:

General Liquid Crystal Module is lined by line scan to go and is counted Row;

Read the general Liquid Crystal Module data of delegation by Row;

Calculate buffer zone address by Row;

The data and the buffer data that read are compared one by one, if both are not all equal, the corresponding buffer data of Row is write general Liquid Crystal Module;

The general Liquid Crystal Module row counting Row that lines by line scan adds 1;

The row counting Row=0 if Row=end line, general Liquid Crystal Module are lined by line scan;

Reinitialize general Liquid Crystal Module.

This method is used in the instrument of kinds of experiments chamber, when carrying out the EMC test before using, the situations such as white screen, flower screen, mess code will inevitably occur, and after use this method, all are normal.Experiment shows, has obtained good result.

Description of drawings

Fig. 1 is definition ram buffer process flow diagram in the embodiment of the present invention.

Fig. 2 shows in the embodiment of the present invention that data write the ram buffer process flow diagram.

Fig. 3 compares the ram buffer data flowchart in the embodiment of the present invention.

Embodiment

In conjunction with Fig. 1,2 and 3, for the T6963 controller, display resolution is the general Liquid Crystal Module of 240X128, at first, the definition ram buffer comprises:

Calculate buffer size=240X128/8;

By computational length definition buffer zone,

Secondly, show that data write ram buffer, comprising:

Obtain general Liquid Crystal Module actual displayed position (x, y);

Calculate corresponding buffer zone address=(y*240/8)+x;

Write the demonstration data to general Liquid Crystal Module, synchronous save data again, compares the ram buffer data to the buffer zone corresponding address, comprising:

General Liquid Crystal Module is lined by line scan to go and is counted Row;

Read the general Liquid Crystal Module data of delegation by Row;

Calculate buffer zone address by Row;

The data and the buffer data that read are compared one by one, if both are not all equal, the corresponding buffer data of Row is write general Liquid Crystal Module;

The general Liquid Crystal Module row counting Row that lines by line scan adds 1;

The row counting Row=0 if Row=end line, general Liquid Crystal Module are lined by line scan;

Reinitialize general Liquid Crystal Module.

Claims (2)

1. the anti-interference self-recovery method of a general Liquid Crystal Module, is characterized in that, comprises the following steps:

Step 1 is selected a block RAM buffer zone, and the size of this buffer zone depends on the display resolution of described general Liquid Crystal Module, and this buffer zone is in order to preserve the demonstration data of described general Liquid Crystal Module;

Step 2 writes the data of described general Liquid Crystal Module, synchronously is saved in described ram buffer;

Step 3, in the real-time procedure for displaying of described general Liquid Crystal Module, the real-time demonstration data and the described ram buffer that read described general Liquid Crystal Module compare, in case find that data are different, synchronously write renewal with described ram buffer data to described general Liquid Crystal Module;

Step 4 in real-time procedure for displaying, repeats the described general Liquid Crystal Module of initialization.

2. the anti-interference self-recovery method of general Liquid Crystal Module as claimed in claim 1, is characterized in that, for the T6963 controller, display resolution is the general Liquid Crystal Module of 240X128,

At first, the definition ram buffer comprises:

Calculate buffer size=240X128/8;

By computational length definition buffer zone,

Secondly, show that data write ram buffer, comprising:

Obtain general Liquid Crystal Module actual displayed position (x, y);

Calculate corresponding buffer zone address=(y*240/8)+x;

Write and show data to general Liquid Crystal Module, synchronous save data is to the buffer zone corresponding address,

Again, compare the ram buffer data, comprising:

General Liquid Crystal Module is lined by line scan to go and is counted Row;

Read the general Liquid Crystal Module data of delegation by Row;

Calculate buffer zone address by Row;

The data and the buffer data that read are compared one by one, if both are not all equal, the corresponding buffer data of Row is write general Liquid Crystal Module;

The general Liquid Crystal Module row counting Row that lines by line scan adds 1;

The row counting Row=0 if Row=end line, general Liquid Crystal Module are lined by line scan;

Reinitialize general Liquid Crystal Module.

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