CN111710309A

CN111710309A - Liquid crystal display screen driving method and device, liquid crystal display system and storage medium

Info

Publication number: CN111710309A
Application number: CN202010618034.2A
Authority: CN
Inventors: 李亚鉴
Original assignee: Shenzhen TCL Digital Technology Co Ltd
Current assignee: Shenzhen TCL Digital Technology Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2020-09-25
Anticipated expiration: 2040-06-30
Also published as: CN111710309B

Abstract

The invention provides a liquid crystal display screen driving method, a liquid crystal display screen driving device, a liquid crystal display system and a storage medium, wherein the method comprises the following steps: the method comprises the following steps that a liquid crystal display screen driving device obtains a signal identifier corresponding to the liquid crystal display screen and obtains a corresponding signal scheme according to the signal identifier; and outputting a corresponding driving signal according to the signal scheme so as to drive the liquid crystal display screen to display. The liquid crystal display screen driving device can automatically and universally match various types of liquid crystal display screens and drive display, solves the technical problem that the liquid crystal display screen needs to be driven by using a special main board, improves the adaptability of the liquid crystal display screen driving device, and provides convenience for daily maintenance and after-sale maintenance of the liquid crystal display screen.

Description

Liquid crystal display screen driving method and device, liquid crystal display system and storage medium

Technical Field

The invention relates to the technical field of display screens, in particular to a liquid crystal display screen driving method and device, a liquid crystal display system and a storage medium.

Background

A liquid crystal display panel is an active matrix liquid crystal display device driven by means of Thin Film Transistors (TFTs); in order to make the lcd normally display, the main board usually outputs a function signal corresponding to the lcd to drive the lcd.

With the rapid development of the television industry, liquid crystal display screens with different sizes and resolutions appear on televisions on the market, and the types of the main boards are diversified in order to be matched with the liquid crystal display screens. However, this kind of condition can bring inconvenience for liquid crystal display's daily use, when liquid crystal display assembles or maintains, if the mainboard that uses is not the special mainboard of liquid crystal display adaptation, will lead to unable drive liquid crystal display normal demonstration.

Disclosure of Invention

The invention mainly aims to provide a liquid crystal display screen driving method, a liquid crystal display screen driving device, a liquid crystal display system and a storage medium, and aims to solve the technical problem that a special main board is required to be used for driving the liquid crystal display screen.

In order to achieve the above object, an embodiment of the present invention provides a liquid crystal display driving method, where the liquid crystal display driving method is applied to a liquid crystal display driving apparatus, the liquid crystal display driving apparatus supports outputting of driving signals of two or more systems, and the liquid crystal display driving method includes:

acquiring a signal identifier corresponding to the liquid crystal display screen, and acquiring a corresponding signal scheme according to the signal identifier;

and outputting a corresponding driving signal according to the signal scheme so as to drive the liquid crystal display screen to display.

Optionally, the step of obtaining a signal identifier corresponding to the liquid crystal display screen and obtaining a corresponding signal scheme according to the signal identifier includes:

acquiring extended display identification data EDID of the liquid crystal display screen;

determining a first signal identifier corresponding to the liquid crystal display screen according to the EDID, and acquiring a corresponding first signal scheme according to the first signal identifier;

correspondingly, the step of outputting a corresponding driving signal according to the signal scheme to drive the liquid crystal display screen to display includes:

and outputting a corresponding driving signal according to the first signal scheme so as to drive the liquid crystal display screen to display.

Optionally, before the step of obtaining the extended display identification data EDID of the liquid crystal display screen, the method further includes:

judging whether a pre-stored second signal identifier corresponding to the liquid crystal display screen exists or not;

if the second signal identifier exists, acquiring a corresponding second signal scheme according to the second signal identifier;

outputting a corresponding driving signal according to the second signal scheme to drive the liquid crystal display screen to display;

correspondingly, the step of obtaining the extended display identification data EDID of the liquid crystal display screen includes:

and if the second signal identification does not exist, acquiring extended display identification data EDID of the liquid crystal display screen.

Optionally, the step of obtaining the extended display identification data EDID of the liquid crystal display screen includes:

and acquiring a memory address from a preset address database, and accessing the memory space of the liquid crystal display screen according to the memory address so as to acquire the EDID of the liquid crystal display screen from the memory space.

Optionally, after the step of obtaining a memory address from a preset address database and accessing the memory space of the liquid crystal display screen according to the memory address to obtain the EDID of the liquid crystal display screen from the memory space, the method further includes:

acquiring a first check code corresponding to the EDID from the memory space, and calculating to obtain a second check code according to the EDID;

if the first check code is inconsistent with the second check code, determining that the EDID is invalid, executing the step to acquire a memory address from a preset address database, and accessing the memory space of the liquid crystal display screen according to the memory address to acquire the EDID of the liquid crystal display screen from the memory space;

correspondingly, the step of determining the first signal identifier corresponding to the liquid crystal display screen according to the EDID and obtaining the corresponding first signal scheme according to the first signal identifier includes:

and if the first check code is consistent with the second check code, determining a first signal identifier corresponding to the liquid crystal display screen according to the EDID, and acquiring a corresponding first signal scheme according to the first signal identifier.

Optionally, if the first check code and the second check code are not consistent, the step of determining that the EDID is invalid, and performing the step of obtaining a memory address from a preset address database, and accessing the memory space of the liquid crystal display screen according to the memory address to obtain the EDID of the liquid crystal display screen from the memory space includes:

if the first check code is inconsistent with the second check code, determining that the EDID is invalid and updating the invalid times;

and if the updated invalid times are less than a preset threshold value, executing the step to obtain a memory address from a preset address database, and accessing the memory space of the liquid crystal display screen according to the memory address so as to obtain the EDID of the liquid crystal display screen from the memory space.

Optionally, after the step of determining that the EDID is invalid and updating the invalid times if the first check code and the second check code are not consistent, the method further includes:

if the updated invalid times are larger than or equal to a preset threshold value, acquiring a preset default signal identifier, and acquiring a corresponding default signal scheme according to the default signal identifier;

and outputting a corresponding driving signal according to the default signal scheme so as to drive the liquid crystal display screen to display.

Optionally, after the step of outputting the corresponding driving signal according to the signal scheme to drive the liquid crystal display to display, the method further includes:

if the display of the liquid crystal display screen is abnormal, acquiring a signal identifier again based on a user instruction, and determining a signal scheme again according to the newly acquired signal identifier;

and outputting a corresponding driving signal according to the newly determined signal scheme so as to drive the liquid crystal display screen to display.

and if the display of the liquid crystal display screen is normal, recording the signal identification so as to obtain the signal identification when the liquid crystal display screen is started next time.

In addition, in order to achieve the above object, an embodiment of the present invention further provides a liquid crystal display driving apparatus, where the liquid crystal display driving apparatus supports outputting of driving signals of two or more systems, the liquid crystal display driving apparatus includes a processor, a memory, and a computer program stored in the memory and executable by the processor, where the computer program, when executed by the processor, implements the steps of the liquid crystal display driving method as described above.

In addition, in order to achieve the above object, an embodiment of the present invention further provides a liquid crystal display system, where the liquid crystal display system includes a liquid crystal display driving device and a liquid crystal display, and the liquid crystal display driving device supports outputting driving signals of more than two systems;

the liquid crystal display screen driving device is used for acquiring a signal identifier corresponding to the liquid crystal display screen and acquiring a corresponding signal scheme according to the signal identifier; and outputting a corresponding driving signal according to the signal scheme so as to drive the liquid crystal display screen to display.

In addition, to achieve the above object, an embodiment of the present invention further provides a storage medium, where a computer program is stored, where the computer program, when executed by a processor, implements the steps of the liquid crystal display driving method as described above.

The liquid crystal display screen driving device of the embodiment of the invention supports signal output of various signal systems, thereby being capable of driving various different liquid crystal display screens to display; in the driving process, a signal identifier corresponding to the liquid crystal display screen is obtained firstly, then a corresponding signal scheme is obtained according to the signal identifier, and a driving signal is output based on a signal method so as to drive the liquid crystal display screen to display; through the mode, the liquid crystal display driving device can automatically and flexibly drive various types of liquid crystal displays to display, solves the technical problem that the liquid crystal display needs to be driven by using a special main board, improves the adaptability of the liquid crystal display driving device, and provides convenience for daily maintenance and after-sales maintenance of the liquid crystal display.

Drawings

Fig. 1 is a schematic diagram of a hardware configuration of a liquid crystal display driving apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart illustrating a method for driving a liquid crystal display panel according to a first embodiment of the present invention;

fig. 3 is a functional block diagram of a driving apparatus for a liquid crystal display according to a first embodiment of the invention.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The liquid crystal display screen driving method related by the embodiment of the invention is mainly applied to a liquid crystal display screen driving device, and the liquid crystal display screen driving device can be a mainboard or other devices with data processing functions.

Referring to fig. 1, fig. 1 is a schematic diagram of a hardware structure of a liquid crystal display driving apparatus according to an embodiment of the present invention. In this embodiment of the present invention, the lcd driving apparatus may include a processor 1001 (e.g., a Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used for realizing connection communication among the components; the user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard); the network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WI-FI interface, WI-FI interface); the memory 1005 may be a Random Access Memory (RAM) or a non-volatile memory (non-volatile memory), such as a magnetic disk memory, and the memory 1005 may optionally be a storage device independent of the processor 1001. Those skilled in the art will appreciate that the hardware configuration depicted in FIG. 1 is not intended to be limiting of the present invention, and may include more or less components than those shown, or some components in combination, or a different arrangement of components.

With continued reference to FIG. 1, the memory 1005 of FIG. 1, which is one type of computer-readable storage medium, may include an operating system, a communication module, and a computer program. In fig. 1, the communication module may be used to connect other devices (apparatuses) and perform data communication; and the processor 1001 may call the computer program stored in the memory 1005 and perform the steps of the embodiments of the liquid crystal display driving method of the present invention.

Based on the hardware architecture, the embodiments of the driving method of the liquid crystal display screen are provided.

The embodiment of the invention provides a liquid crystal display screen driving method.

Referring to fig. 2, fig. 2 is a flowchart illustrating a method for driving a liquid crystal display according to a first embodiment of the present invention.

In this embodiment, the liquid crystal display driving method is applied to a liquid crystal display driving apparatus, the liquid crystal display driving apparatus supports outputting of driving signals of two or more systems, and the liquid crystal display driving includes the following steps:

step S10, acquiring a signal identifier corresponding to the liquid crystal display screen, and acquiring a corresponding signal scheme according to the signal identifier;

a liquid crystal display panel is an active matrix liquid crystal display device driven by means of Thin Film Transistors (TFTs); in order to make the lcd normally display, the main board usually outputs a function signal corresponding to the lcd to drive the lcd. With the rapid development of the television industry, liquid crystal display screens with different sizes and resolutions appear on televisions on the market, and the types of the main boards are diversified in order to be matched with the liquid crystal display screens. However, this kind of condition can bring inconvenience for liquid crystal display's daily use, when liquid crystal display assembles or maintains, if the mainboard that uses is not the special mainboard of liquid crystal display adaptation, will lead to unable drive liquid crystal display normal demonstration. In contrast, the present embodiment provides a method for driving a liquid crystal display, which is applied to a liquid crystal display driving apparatus, where the liquid crystal display driving apparatus supports signal output of multiple signal systems, so as to drive multiple different liquid crystal displays to display; in the driving process, a signal identifier corresponding to the liquid crystal display screen is obtained firstly, then a corresponding signal scheme is obtained according to the signal identifier, and a driving signal is output based on a signal method so as to drive the liquid crystal display screen to display; through the mode, the liquid crystal display driving device can automatically and flexibly drive various types of liquid crystal displays to display, solves the technical problem that the liquid crystal display needs to be driven by using a special main board, improves the adaptability of the liquid crystal display driving device, and provides convenience for daily maintenance and after-sales maintenance of the liquid crystal display.

The liquid crystal display driving device in this embodiment may be a main board or other device having a data processing function; for convenience of description, the main board is taken as an example in this embodiment. The SOC of the integrated chip of the mainboard supports global analog television systems, such as PAL-BG/DK/I, NTSC-M, PAL-M/N, SECAM-BG/DK, and also supports global digital television systems, such as DVB-T/S/T2/S2, ATSC, ISDB-T/S; meanwhile, the SOC of the mainboard supports independent output of more than two systems of driving signals for driving the liquid crystal display to display, such as LVDS supporting output of HD, LVDS of FHD, V-BY-ONE of UD and the like. In addition, the main board is compatible with interface function ports of liquid crystal displays such as HD, FHD, UD and the like, can adapt to liquid crystal displays of different types, and uses a program of the same version in the process of connecting and driving the liquid crystal displays of different types, and extended display identification data EDID of different liquid crystal displays, including parameters such as manufacturers, models, resolution ratios, sizes, frequencies and the like, is configured in a database of the program; the different extended display identification data EDID correspond to different signal identifications Project ID, which correspond to different signal schemes, and the content of the signal schemes includes screen parameters, PQ parameters, AQ parameters, etc. of the driving signals. For example, as shown below, the correspondence between the signal identification Project ID and the extended display identification data EDID and the signal scheme may be recorded by a relationship table, where table 1 is a relationship table between the Project ID and EDID in the database, and table 2 is a relationship table between the Project ID and the signal scheme in the database:

TABLE 1 relationship Table of Project ID and EDID

Serial number

Manufacturer of the product

Size of

Model number

Frequency of

Resolution ratio

…

Project ID

0000

CSOT

32 cun below the floor

ST3151A05-7

50Hz

1366X768

…

0000

0001

CSOT

32 cun below the floor

ST3151A05-8

60Hz

1366X768

…

0001

0002

CMO

40 inch (U)

V400HJ9-PE1

60Hz

1920X1080

…

0002

0003

AUO

65 cun in the front of the body

T650QVN08.7

120Hz

3840X2160

…

0003

…

TABLE 2 Project ID vs. Signal scheme Table

Of course, besides the above examples, the relation table in a specific application may include more contents, or the relation between the signal identification Project ID, the extended display identification data EDID and the signal scheme may be recorded in a different manner.

In this embodiment, the main board is connected to a liquid crystal display in advance. When the motherboard is started and initialized, the program of the motherboard SOC will obtain the signal identifier Project ID corresponding to the lcd. As described above, the extended display identification data EDID of different screens corresponds to different signal identifiers Project ID, and the signal identifiers Project ID correspond to signal schemes; when the signal identification Project ID is acquired, a signal scheme corresponding to the signal identification Project ID can be thus acquired from the database.

Step S20, outputting a corresponding driving signal according to the signal scheme to drive the liquid crystal display screen to display;

in this embodiment, when the SOC of the motherboard determines the signal scheme, the corresponding driving signal may be output according to each driving parameter in the signal scheme to drive the liquid crystal display to display, thereby implementing various types of liquid crystal displays that are automatically configured and drive the display.

The liquid crystal display driving method in the embodiment is applied to a liquid crystal display driving device, and the liquid crystal display driving device supports outputting of driving signals of more than two systems; the liquid crystal display screen driving device acquires a signal identifier corresponding to the liquid crystal display screen and acquires a corresponding signal scheme according to the signal identifier; and outputting a corresponding driving signal according to the signal scheme so as to drive the liquid crystal display screen to display. Through the mode, the liquid crystal display screen driving device supports signal output of various signal systems, so that various different liquid crystal display screens can be driven to display; in the driving process, a signal identifier corresponding to the liquid crystal display screen is obtained firstly, then a corresponding signal scheme is obtained according to the signal identifier, and a driving signal is output based on a signal method so as to drive the liquid crystal display screen to display; through the mode, the liquid crystal display driving device can automatically and flexibly drive various types of liquid crystal displays to display, solves the technical problem that the liquid crystal display needs to be driven by using a special main board, improves the adaptability of the liquid crystal display driving device, and provides convenience for daily maintenance and after-sales maintenance of the liquid crystal display.

Based on the first embodiment of the liquid crystal display driving method, a second embodiment of the liquid crystal display driving method of the present invention is provided.

In this embodiment, the step S10 includes:

step A11, obtaining extended display identification data EDID of the liquid crystal display screen;

in this embodiment, the signal identifier Project ID corresponding to the liquid crystal display panel may be determined according to extended display identification data EDID of the liquid crystal display panel. The SOC of the main board will first obtain the extended display identification data EDID of the liquid crystal display. The extended display identification data EDID may be stored in the liquid crystal display, and the SOC of the main board accesses the liquid crystal display to obtain the extended display identification data EDID from the liquid crystal display; the extended display identification data EDID may also be stored in a network or other location, and the SOC of the main board first obtains a feature identifier of the liquid crystal display, such as a hardware number, a device number, and the like, and then obtains the extended display identification data EDID of the liquid crystal display from the network or other location according to the feature identifier. Of course, the extended display identification data EDID of the liquid crystal display panel may be obtained in other manners besides the above-mentioned examples.

Step A12, determining a first signal identifier corresponding to the liquid crystal display screen according to the EDID, and obtaining a corresponding first signal scheme according to the first signal identifier.

In this embodiment, when the SOC of the motherboard obtains the extended display identification data EDID of the liquid crystal display, the signal identifier Project ID corresponding to the liquid crystal display may be determined according to the extended display identification data EDID, and for convenience of description, the signal identifier determined according to the extended display identification data EDID in this embodiment may be referred to as a first signal identifier. The determination of the first signal identifier may be implemented based on a relationship between the Project ID and the extended display identification data EDID recorded in the main board data, for example, when the SOC of the main board obtains the extended display identification data EDID of the liquid crystal display screen, the above table 1 (a relationship table between the Project ID and the EDID) may be queried, so as to determine the corresponding first signal identifier. When the first signal identifier is determined, the SOC of the motherboard can obtain the corresponding signal scheme according to the first signal identifier, and for convenience of description, the signal scheme obtained according to the first signal identifier in this embodiment may be referred to as a first signal scheme. The obtaining of the first signal scheme may be implemented based on a relationship between the Project ID and the signal scheme recorded in the motherboard data, for example, when the SOC of the motherboard obtains the first signal identifier, the above table 1 (a relationship table between the Project ID and the signal scheme) may be queried to determine the corresponding first signal scheme.

Accordingly, the step S20 includes:

When the SOC of the mainboard determines the first signal scheme, corresponding driving signals can be output according to the driving parameters in the first signal scheme so as to drive the liquid crystal display screen to display signals, and therefore various types of liquid crystal display screens which are flexibly matched are driven to display.

For ease of understanding, the above steps are illustrated: firstly, the main board acquires EDID of the liquid crystal display screen, wherein the obtained EDID is (COST of manufacturer, size of 32 inches, model ST3151A05-8, frequency of 60Hz, resolution of 1366X 768.); the mainboard can query the table 1 according to the obtained EDID, so as to determine a corresponding first signal identifier 0001 in the Project ID column; then, according to the first signal identifier 0001, referring to table 2, a corresponding first signal scheme can be obtained, including screen parameter HD _ ST3151a05_8.ini, PQ parameter vip _ default _ PQ _ ID1.bin. lzma, AQ parameter ID00 soc _6o _5w.ini, etc.; when the first signal scheme is determined, the main board outputs corresponding driving signals according to the driving parameters in the first signal scheme so as to drive the liquid crystal display screen to display signals, and therefore various types of liquid crystal display screens which are flexibly matched are driven to display.

Through the mode, the mainboard can determine the corresponding signal identification based on the extended display screen identification data EDID of the liquid crystal display screen, and the corresponding signal scheme is used for driving the liquid crystal display screen to display by subsequently outputting the corresponding driving signal.

Further, in this embodiment, before the step a11, the method further includes:

step A13, judging whether a second signal identifier corresponding to a prestored liquid crystal display screen exists or not;

the corresponding signal identification Project ID with respect to the liquid crystal display panel may be determined from the previous drive record. Specifically, after the SOC of the motherboard inputs the driving signal, corresponding recording is performed, the recorded content includes the signal identifier Project ID corresponding to the driving signal, and is pre-stored in the database for use when the motherboard is started next time, and for convenience of description, the pre-stored signal identifier Project ID may be referred to as a second signal identifier; when the motherboard is started next time, whether the second signal identifier pre-stored in the database exists or not is judged.

Step A14, if the second signal identifier exists, acquiring a corresponding second signal scheme according to the second signal identifier;

in this embodiment, if the second signal identifier exists in the database, the SOC of the motherboard may directly obtain the corresponding signal scheme according to the second signal identifier, and for convenience of description, the signal scheme obtained according to the pre-stored second signal identifier may be referred to as a second signal scheme. Similar to the acquiring process of the first signal scheme, the second signal scheme may also be acquired based on the relationship between the Project ID and the signal scheme recorded in the motherboard data, for example, when the SOC of the motherboard obtains the second signal identifier, and the second signal identifier is 0002, the above table 2 (the relationship table between the Project ID and the signal scheme) may be queried to determine the corresponding second signal scheme, which includes the screen parameter FHD _ V400HJ9_ pe1.ini, the PQ parameter vip _ default _ PQ _ ID2.bin. lzma, and the AQ parameter ID00 SOC _6o _8 w.ini.

Correspondingly, the step S20 further includes:

and outputting a corresponding driving signal according to the second signal scheme so as to drive the liquid crystal display screen to display.

When the SOC of the mainboard determines the second signal scheme, corresponding driving signals can be output according to the driving parameters in the second signal scheme so as to drive the liquid crystal display screen to display signals, and therefore various types of liquid crystal display screens which are flexibly matched are driven to display.

Correspondingly, the step a12 includes:

In this embodiment, if the second signal identifier does not exist in the database, the SOC of the motherboard needs to obtain the extended display identification data EDID of the liquid crystal display, and determine the first signal identifier according to the extended display identification data EDID of the liquid crystal display; the specific obtaining process can be seen in step a12, which is not described herein again.

Through the above manner, the mainboard can judge whether the pre-stored second signal identifier exists or not at first when being started, and if the pre-stored second signal identifier exists, the signal scheme is determined according to the second signal identifier without acquiring extended display screen identification data EDID, so that the processing efficiency is improved; and if the pre-stored second signal identification does not exist, acquiring extended display screen identification data EDID for acquiring the first signal identification and determining the signal scheme.

For ease of understanding, the flow of the above-described second embodiment is briefly described: after the mainboard is started, whether a pre-stored second signal identifier exists before is judged (namely whether a previous use record exists is inquired); if the first signal identifier exists, the second signal identifier can be obtained, a second signal scheme is determined according to the second signal identifier, and a driving signal is output according to the second signal scheme; and if the driving signal does not exist, the EDID of the liquid crystal display screen is obtained, the first signal identification is determined according to the EDID, the first signal scheme is determined according to the first signal identification, and the driving signal is output according to the first signal scheme.

Based on the second embodiment of the liquid crystal display driving method described above, a third embodiment of the liquid crystal display driving method of the present invention is provided.

In this embodiment, the step a11 includes:

step A111, obtaining a memory address from a preset address database, and accessing the memory space of the liquid crystal display screen according to the memory address to obtain the EDID of the liquid crystal display screen from the memory space.

In this embodiment, the extended display identification data EDID of the liquid crystal display is stored in a memory space of the liquid crystal display, for example, in an EEPROM (Electrically Erasable Programmable read only memory), where the EEPROM refers to a charged Electrically Erasable Programmable read only memory; in order to obtain the extended display identification data EDID, the SOC of the main board needs to access the content space of the liquid crystal display. Specifically, the database of the motherboard further stores memory addresses of the liquid crystal display, and a set formed by the memory addresses may also be referred to as an address database, and of course, the memory addresses may be recorded in a table form, for example, as shown in table 3 below, table 3 is an EEPROM address table of the liquid crystal display:

TABLE 3 EEPROM Address Table for liquid Crystal display

Serial number	EEPROM address
		0001	0X0010
0002	0X0020
		…	…

The SOC of the motherboard may obtain a memory address of the liquid crystal display from the address database (or table 3 above), and then access a memory space (EEPROM) of the liquid crystal display according to the memory address to obtain extended display identification data EDID of the liquid crystal display from the memory space; when accessing the memory space of the liquid crystal display, the access may be performed in the form of an Inter-Integrated Circuit (IIC) bus. Wherein,

it should be noted that the address database may store the memory addresses of a plurality of liquid crystal displays; in this regard, the SOC of the motherboard may respectively call each memory address in a traversal manner to attempt to access a memory space (EEPROM) of the liquid crystal display until the memory address corresponding to the liquid crystal display is determined, and then obtain extended display identification data EDID of the liquid crystal display from the memory space of the liquid crystal display.

Through the above manner, the main board in this embodiment first obtains the memory address of the liquid crystal display, and then accesses the memory space of the liquid crystal display based on the memory address, so as to obtain the extended display identification data EDID of the liquid crystal display, so as to subsequently determine the corresponding first signal identification.

Further, after the step a111, the method further includes:

step A15, obtaining a first check code corresponding to the EDID from the memory space, and calculating to obtain a second check code according to the EDID;

in this embodiment, the extended display identification data EDID acquired by the SOC of the main board from the liquid crystal display screen is not necessarily valid, and therefore, the relevant verification processing is performed after the acquisition. Specifically, after the SOC of the motherboard acquires extended display identification data EDID from the memory space of the liquid crystal display, the SOC of the motherboard also acquires a first check code CRC1 corresponding to the EDID from the memory space; then, the SOC of the motherboard calculates a second check code CRC2 according to the EDID; after the first check code CRC1 and the second check code CRC2 are obtained, the SOC of the motherboard compares the two codes to determine whether the two codes are consistent.

Step A16, if the first check code and the second check code are not consistent, determining that the EDID is invalid, executing the steps to obtain a memory address from a preset address database, and accessing the memory space of the liquid crystal display screen according to the memory address to obtain the EDID of the liquid crystal display screen from the memory space.

In this embodiment, if the first check code CRC1 and the second check code CRC2 are not consistent, it may be considered that the check is failed, and it is determined that the currently acquired EDID is invalid; at this time, the SOC of the motherboard acquires the memory address from the address library again, and accesses the memory space of the liquid crystal display screen according to the memory address to acquire the EDID of the liquid crystal display screen again, that is, the steps of steps a111 and a15 are executed again.

Correspondingly, the step a12 includes:

In this embodiment, if the first check code CRC1 is consistent with the second check code CRC2, the check may be considered as successful, at this time, it is determined that the currently obtained EDID is valid, the first signal identifier corresponding to the liquid crystal display screen may be determined according to the EDID, and the corresponding first signal scheme may be obtained according to the first signal identifier; for specific implementation, refer to step a12, which is not described herein again.

Through the above manner, after the EDID is obtained from the memory space of the liquid crystal display screen, the EDID is checked and whether the EDID is valid is judged; the signal identification is obtained when the EDID is valid, and the signal identification is obtained again when the EDID is invalid, so that the conditions of subsequent signal scheme errors and driving errors caused by invalid EDID are avoided.

Still further, the step a16 includes:

if the first check code is inconsistent with the second check code, the checking can be regarded as failed, and at the moment, the EDID is determined to be invalid, and the invalid times are updated; when the EDID is invalid due to inconsistency between the first check code and the second check code, the number of times of invalidation is increased by one, and then the magnitude relationship between the number of times of invalidation and a preset threshold value may be determined, where the preset threshold value may be set according to actual conditions, for example, to 3.

If the first check code CRC1 and the second check code CRC2 are not consistent, it may be determined that the currently acquired EDID is invalid; at the moment, the SOC of the mainboard updates the invalid times;

If the updated invalid times are smaller than the preset threshold, the SOC of the motherboard acquires the memory address from the address library again, and accesses the memory space of the liquid crystal display screen according to the memory address to acquire the EDID of the liquid crystal display screen again, that is, the steps a111 and a15 are executed again. For example, the updated invalid times are 2 times and less than the preset threshold value for 3 times, and at this time, the SOC of the motherboard obtains the EDID of the liquid crystal display again and verifies the EDID.

If the updated invalid times are larger than or equal to a preset threshold value, the EDID which is continuously obtained for multiple times at present can be considered invalid; at this moment, in order to avoid resource waste caused by continuously obtaining the EDID, the SOC of the mainboard obtains a preset default signal identifier, obtains a corresponding default signal scheme according to the default signal identifier, and then outputs a corresponding driving signal according to the default signal scheme to drive the liquid crystal display to display; the default signal identifier may be a default Prejec ID preset by a user, or the master board uses the Prejec ID with the highest frequency of use (or the largest number of times of use) as the default signal identifier according to a historical driving condition, which may of course be another setting manner, and the default signal scheme is a driving parameter scheme corresponding to the default signal identifier. For example, the updated invalid times are 4 times, which is equal to the preset threshold value 3 times, at this time, the SOC of the motherboard obtains the default signal identifier, and thus obtains the corresponding signal scheme, and outputs the corresponding driving signal.

Through the above manner, the embodiment can judge whether to continue to acquire the EDID currently or not through the comparison of the invalid times, and if the invalid times are too many, the preset default signal identifier can be acquired to acquire the corresponding signal scheme for driving and displaying, so that resource waste caused by acquiring the invalid EDID for many times is avoided.

Based on the first embodiment of the liquid crystal display driving method, a fourth embodiment of the liquid crystal display driving method of the present invention is provided.

In this embodiment, after step S20, the method further includes:

and A30, if the display of the liquid crystal display screen is normal, recording the signal identification so as to obtain the signal identification when the liquid crystal display screen is started next time.

In this embodiment, the SOC of the main board drives the liquid crystal display screen by outputting the driving signal, and then detects whether the liquid crystal display screen normally displays. If the output driving signal is matched with the liquid crystal display screen, the liquid crystal display screen displays normally; at this time, the SOC of the motherboard records the signal identifier Project ID corresponding to the signal scheme used this time, and directly obtains the signal identifier Project ID when starting the next time.

Through above mode, but detect liquid crystal display's demonstration condition behind output drive signal, if show normal then record signal sign to directly acquire the use when supplying the next start, thereby improve subsequent drive efficiency.

A fifth embodiment of the liquid crystal display driving method according to the present invention is provided based on any one of the first to fourth embodiments of the liquid crystal display driving method.

In this embodiment, after step S20, the method further includes:

step A40, if the liquid crystal display screen is abnormal, re-acquiring the signal identification based on the user instruction, and re-determining the signal scheme according to the newly acquired signal identification;

in this embodiment, the SOC of the main board drives the liquid crystal display screen by outputting the driving signal, and then detects whether the liquid crystal display screen normally displays. If the output driving signal is not matched with the liquid crystal display screen, the liquid crystal display screen displays abnormity, the SOC of the mainboard can acquire the Project ID of the signal identification again through a user instruction at the moment, and the signal scheme is determined again according to the newly acquired Project ID of the signal identification. Specifically, if the liquid crystal display supports displaying an OSD (On-screen display, screen adjustment menu), when the liquid crystal display fails to display, corresponding identification options are displayed in the OSD menu according to the signal identification Project ID stored in the data of the main board for a user to select, and the user can select one identification option in the OSD menu through a remote controller or keys of the liquid crystal display body; when the user finishes the selection, the SOC of the mainboard can reacquire the corresponding signal identifier Project ID according to a user instruction triggered by the user selection, and can reacquire the signal scheme according to the newly acquired signal identifier Project ID. If the liquid crystal display does not support displaying the OSD menu, the liquid crystal display does not display related menu options but displays a bright screen (or displays a curtain with default colors, such as a white screen, a blue screen and the like), and at the moment, a user can input a related password in the input box through a remote controller or keys of the liquid crystal display body so as to select a signal identification Project ID; when the user input is finished, the SOC of the mainboard can reacquire the corresponding signal identifier Project ID according to a user instruction triggered by the user input, and can reacquire the signal scheme according to the newly acquired signal identifier Project ID. It should be noted that even if the lcd supports displaying the OSD menu, the user may trigger the user command by inputting the signal identifier Project ID, so that the SOC of the motherboard can obtain the corresponding signal identifier Project ID again according to the user command triggered by the user input.

And step A50, outputting a corresponding driving signal according to the newly determined signal scheme to drive the liquid crystal display screen to display.

In this embodiment, when the SOC of the motherboard determines a new signal scheme, the corresponding driving signal may be output according to each driving parameter in the newly determined signal scheme, so as to drive the liquid crystal display to display a signal. Of course, after the re-output, the display condition of the liquid crystal display screen may also be detected again, and if the display is still abnormal, steps a40 and a50 may be executed again, which is not described herein again.

Through the mode, the display condition of the liquid crystal display screen can be detected after the driving signal is output, if the display is abnormal, the signal identification can be determined according to the user instruction instead of the automatic selection signal identification, so that the signal scheme is determined according to the newly determined signal identification, the driving signal is output, and the normal display of the liquid crystal display screen is facilitated.

It should be noted that, the steps of the liquid crystal display driving method according to the above embodiments may be combined according to actual situations. For ease of understanding, the following is briefly exemplified:

when a certain liquid crystal display screen is matched with the original main board for use, the liquid crystal display screen cannot normally display, and the original main board cannot be used continuously after being detected to be damaged; when in maintenance, the original main board can be replaced by the main board (the liquid crystal display driving device) in the scheme of the embodiment, and the newly replaced main board outputs driving signals of more than two systems. When a new mainboard is started and initialized, whether a pre-stored second signal identifier exists or not is judged; if the first signal identifier exists, the second signal identifier can be obtained, a second signal scheme is determined according to the second signal identifier, and a driving signal is output according to the second signal scheme; and if not, obtaining the EDID of the liquid crystal display screen. When the EDID is obtained, the validity of the EDID is judged in a check code mode; if invalid EDID is obtained for multiple times, the mainboard obtains a default signal identification, obtains a corresponding default signal scheme according to the default signal identification, and outputs a corresponding driving signal according to the default signal scheme; and if the EDID is valid, determining a first signal identification according to the EDID, determining a first signal scheme according to the first signal identification, and outputting the driving signal according to the first signal scheme. After the driving signal is output, if the display of the liquid crystal display screen is normal, the currently used signal identifier can be recorded, so that the signal identifier can be obtained to determine a signal scheme (namely, the current signal identifier is prestored) when the liquid crystal display screen is started next time; if the liquid crystal display screen is abnormal, the signal identification can be obtained again based on the user instruction, the signal scheme is determined again according to the newly obtained signal identification, and the corresponding driving signal is output, and the user instruction can be triggered in a selection and input mode.

In addition, the embodiment of the invention also provides a liquid crystal display driving device.

Referring to fig. 3, fig. 3 is a functional block diagram of a driving apparatus for a liquid crystal display according to a first embodiment of the present invention.

In this embodiment, the liquid crystal display driving apparatus supports output of driving signals of two or more systems, and the liquid crystal display driving apparatus includes:

the scheme acquisition module 10 is configured to acquire a signal identifier corresponding to the liquid crystal display screen and acquire a corresponding signal scheme according to the signal identifier;

and the signal output module 20 is configured to output a corresponding driving signal according to the signal scheme to drive the liquid crystal display to display.

Each virtual function module of the liquid crystal display driving apparatus is stored in the memory 1005 of the liquid crystal display driving apparatus shown in fig. 1, and is used for implementing all functions of a computer program; when executed by the processor 1001, the modules may perform the function of driving the lcd panel.

Further, the scheme acquiring module 10 includes:

the data acquisition unit is used for acquiring extended display identification data EDID of the liquid crystal display screen;

the scheme obtaining unit is used for determining a first signal identifier corresponding to the liquid crystal display screen according to the EDID and obtaining a corresponding first signal scheme according to the first signal identifier;

correspondingly, the signal output module 20 is further configured to output a corresponding driving signal according to the first signal scheme to drive the liquid crystal display screen to display.

Further, the scheme acquiring module 10 further includes:

the identification judgment unit is used for judging whether a pre-stored second signal identification corresponding to the liquid crystal display screen exists or not;

the scheme obtaining unit is further configured to obtain a corresponding second signal scheme according to the second signal identifier if the second signal identifier exists;

correspondingly, the signal output module 20 is further configured to output a corresponding driving signal according to the second signal scheme to drive the liquid crystal display screen to display;

the data obtaining unit is further configured to obtain extended display identification data EDID of the liquid crystal display screen if the second signal identifier does not exist.

Further, the data obtaining unit is specifically configured to obtain a memory address from a preset address database, and access the memory space of the liquid crystal display screen according to the memory address, so as to obtain the EDID of the liquid crystal display screen from the memory space.

Further, the scheme acquiring module 10 further includes:

the check code obtaining unit is used for obtaining a first check code corresponding to the EDID from the memory space and calculating to obtain a second check code according to the EDID;

the data acquisition unit is further configured to determine that the EDID is invalid if the first check code and the second check code are not consistent, execute the steps to acquire a memory address from a preset address database, and access the memory space of the liquid crystal display screen according to the memory address to acquire the EDID of the liquid crystal display screen from the memory space;

and the scheme obtaining unit is further configured to determine a first signal identifier corresponding to the liquid crystal display screen according to the EDID if the first check code is consistent with the second check code, and obtain a corresponding first signal scheme according to the first signal identifier.

Further, the data obtaining unit is further configured to determine that the EDID is invalid and update the invalid times if the first check code and the second check code are inconsistent; and if the updated invalid times are less than a preset threshold value, executing the step to obtain a memory address from a preset address database, and accessing the memory space of the liquid crystal display screen according to the memory address so as to obtain the EDID of the liquid crystal display screen from the memory space.

Further, the scheme obtaining module 10 is further configured to obtain a preset default signal identifier if the updated invalid number is greater than or equal to a preset threshold, and obtain a corresponding default signal scheme according to the default signal identifier;

the signal output module 20 is further configured to output a corresponding driving signal according to the default signal scheme, so as to drive the liquid crystal display to display.

Further, the scheme obtaining module 10 is further configured to, if the display of the liquid crystal display screen is abnormal, obtain a signal identifier again based on a user instruction, and re-determine a signal scheme according to the newly obtained signal identifier;

the signal output module 20 is further configured to output a corresponding driving signal according to the newly determined signal scheme to drive the liquid crystal display to display.

Further, the liquid crystal display driving apparatus further includes:

and the identification recording module is used for recording the signal identification if the display of the liquid crystal display screen is normal so as to acquire the signal identification when the liquid crystal display screen is started next time.

The function implementation of each module in the liquid crystal display driving device corresponds to each step in the liquid crystal display driving method embodiment, and the function and implementation process are not described in detail here.

In addition, the embodiment of the invention also provides a liquid crystal display system, which comprises a liquid crystal display screen driving device and a liquid crystal display screen, wherein the liquid crystal display screen driving device supports outputting driving signals with more than two systems;

In the above liquid crystal display system, the implementation of the functions of the liquid crystal display driving apparatus and the liquid crystal display corresponds to the steps in the above liquid crystal display driving method embodiment, and the functions and implementation processes are not described in detail here.

In addition, the embodiment of the invention also provides a readable storage medium.

The readable storage medium of the present invention stores thereon a computer program, wherein the computer program, when executed by a processor, implements the steps of the liquid crystal display driving method as described above.

The method implemented when the computer program is executed may refer to each embodiment of the liquid crystal display driving method of the present invention, and will not be described herein again.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system 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 system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A liquid crystal display driving method is applied to a liquid crystal display driving device, the liquid crystal display driving device supports outputting of driving signals of more than two systems, and the liquid crystal display driving method comprises the following steps:

2. The method for driving a liquid crystal display panel according to claim 1, wherein the step of obtaining a signal identifier corresponding to the liquid crystal display panel and obtaining a corresponding signal scheme according to the signal identifier comprises:

3. The liquid crystal display driving method of claim 2, wherein the step of obtaining extended display identification data EDID of the liquid crystal display is preceded by:

4. The liquid crystal display driving method of claim 2, wherein the step of acquiring extended display identification data EDID of the liquid crystal display includes:

5. The method according to claim 4, wherein after the step of obtaining the memory address from the predetermined address database and accessing the memory space of the liquid crystal display according to the memory address to obtain the EDID of the liquid crystal display from the memory space, the method further comprises:

6. The method for driving a liquid crystal display panel according to claim 5, wherein the step of determining that the EDID is invalid if the first check code and the second check code are not identical, and the step of executing the step of obtaining a memory address from a preset address database and accessing the memory space of the liquid crystal display panel according to the memory address to obtain the EDID of the liquid crystal display panel from the memory space comprises:

7. The liquid crystal display driving method of claim 6, wherein the step of determining that the EDID is invalid and updating the number of invalidations if the first check code and the second check code are not identical further comprises:

8. The method of driving a liquid crystal display panel according to claim 1, wherein after the step of outputting a corresponding driving signal according to the signal scheme to drive the liquid crystal display panel to display, further comprising:

9. The method of driving a liquid crystal display panel according to claim 1, wherein after the step of outputting a corresponding driving signal according to the signal scheme to drive the liquid crystal display panel to display, further comprising:

10. A liquid crystal display driving apparatus supporting output of driving signals of two or more standards, the liquid crystal display driving apparatus comprising a processor, a memory, and a computer program stored on the memory and executable by the processor, wherein the computer program, when executed by the processor, implements the steps of the liquid crystal display driving method as recited in any one of claims 1 to 9.

11. The liquid crystal display system is characterized by comprising a liquid crystal display screen driving device and a liquid crystal display screen, wherein the liquid crystal display screen driving device supports outputting of driving signals with more than two systems;

12. A storage medium having stored thereon a computer program, wherein the computer program, when executed by a processor, implements the steps of the liquid crystal display driving method according to any one of claims 1 to 9.