CN114490477B - Interface switching circuit, method, liquid crystal display screen and storage medium - Google Patents
Interface switching circuit, method, liquid crystal display screen and storage medium Download PDFInfo
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Abstract
The application belongs to the technical field of display, and provides an interface switching circuit, an interface switching method, a liquid crystal display screen and a storage medium, wherein the circuit comprises: a main control chip and a change-over switch module; the main control chip is connected with the switching switch module; the master control chip is configured to: is connected with the embedded display interface; detecting whether a connecting channel between an auxiliary channel of the embedded display interface and an auxiliary channel of the main control chip is reversely connected; if the connection path between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip is reversely connected, outputting a channel signal source selection signal to the change-over switch module; the switcher module is configured to: is connected with the embedded display interface; and switching the connection path between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip into correct connection according to the signal source selection signal. The application can automatically correct when the auxiliary signal output end and the auxiliary signal input end embedded into the display interface are reversely connected, so that the liquid crystal display screen can normally display.
Description
Technical Field
The application belongs to the technical field of display, and particularly relates to an interface switching circuit, an interface switching method, a liquid crystal display screen and a storage medium.
Background
Because of different definitions of Embedded display interfaces (Embedded DisplayPort, EDP) of different types of Liquid crystal display screens (Liquid CRYSTAL DISPLAY, LCD), a screen wire needs to be allocated once for each type of Liquid crystal display screen, and when the screen wire is allocated, the problem that an Auxiliary signal output end (AUXP) of an Auxiliary (AUX) channel Embedded in the display interface is reversely connected with an Auxiliary signal input end (AUXN) is often encountered, so that the Liquid crystal display screen cannot normally display.
Disclosure of Invention
In view of the above, the embodiments of the present application provide an interface switching circuit, an interface switching method, a liquid crystal display, and a computer readable storage medium, so as to solve the problem that the conventional liquid crystal display often has an auxiliary signal output end and an auxiliary signal input end of an auxiliary channel embedded in a display interface connected in opposite directions when a screen is wired, which results in a failure of normal display of the liquid crystal display.
A first aspect of an embodiment of the present application provides an interface switching circuit, which is applied to a liquid crystal display, where the circuit includes a main control chip and a switch module;
The main control chip is connected with the change-over switch module;
the master control chip is configured to:
is connected with the embedded display interface;
Detecting whether a connecting channel between an auxiliary channel of the embedded display interface and an auxiliary channel of the main control chip is reversely connected;
if the connection path between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip is reversely connected, outputting a channel signal source selection signal to the change-over switch module;
The switcher module is configured to:
is connected with the embedded display interface;
And switching a connection channel between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip into correct connection according to the signal source selection signal.
In one embodiment, an auxiliary channel of the main control chip is connected with two signal source input ends of the switch module, a selection output end of the main control chip is connected with a selection input end of the switch module, and a hot plug detection end of the main control chip is configured to be connected with a hot plug detection end of the embedded display interface;
The signal source output end of the change-over switch module is connected with a signal source input end and is configured to be connected with an auxiliary channel of the embedded display interface;
the master control chip is configured to:
detecting whether a connection channel between an auxiliary channel of the embedded display interface and an auxiliary channel of the main control chip is reversely connected or not according to a hot plug detection signal of a hot plug detection end of the embedded display interface;
If the connection path between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip is reversely connected, outputting a channel signal source selection signal to the selection input end of the change-over switch module;
The switcher module is configured to:
And switching the signal source output end to be connected with the other signal source input end according to the signal source selection signal so as to enable the connection passage between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip to be connected correctly.
In one embodiment, the interface switching circuit includes a plurality of the switch modules, and the main control chip and the embedded display interface include a plurality of auxiliary channels;
an auxiliary channel of the main control chip is connected with two signal source input ends of one change-over switch module;
the signal source output end of the change-over switch module is configured to be connected with an auxiliary channel of the embedded display interface.
In one embodiment, an auxiliary channel of the main control chip and the embedded display interface includes an auxiliary signal output end and an auxiliary signal input end;
Each signal source input end of the change-over switch module comprises a positive signal source input end and a negative signal source input end, and the signal source output end of the change-over switch module comprises a positive signal source output end and a negative signal source output end;
an auxiliary signal output end of an auxiliary channel of the main control chip is connected with a negative signal source input end of one signal source input end and a positive signal source input end of the other signal source input end of the change-over switch module, and an auxiliary signal input end of the auxiliary channel of the main control chip is connected with a positive signal source input end and a negative signal source input end of the other signal source input end of the change-over switch module;
The positive signal source output end and the negative signal source output end of the change-over switch module are respectively connected with the positive signal source input end and the negative signal source input end of one signal source input end in one-to-one correspondence, or are respectively connected with the negative signal source input end and the positive signal source input end of one signal source input end in one-to-one correspondence;
The positive signal source output end and the negative signal source output end of the change-over switch module are respectively configured to be connected with the auxiliary signal output end and the auxiliary signal input end of one auxiliary channel of the embedded display interface in a one-to-one correspondence mode.
In one embodiment, the switch module comprises a switch unit, a pull-down unit and a filtering unit;
The signal source input end, the signal source output end and the selection input end of the change-over switch unit are respectively a signal source input end, a signal source output end and a selection input end of the change-over switch module;
the output enabling end of the change-over switch unit is grounded through the pull-down unit;
The power supply end of the change-over switch unit is connected with a power supply and is grounded through the filtering unit;
The grounding terminal of the change-over switch unit is grounded.
In one embodiment, the master control chip is configured to:
Detecting whether a hot plug detection signal is received through the embedded display interface;
if the hot plug detection signal is not received through the embedded display interface, determining that a connection path between an auxiliary channel of the embedded display interface and an auxiliary channel of the main control chip is reversely connected.
A second aspect of the embodiment of the present application provides an interface switching method, applied to a main control chip of a liquid crystal display, where the method includes:
Detecting whether a connecting channel between an auxiliary channel of the embedded display interface and an auxiliary channel of the main control chip is reversely connected;
and if the connection path between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip is reversely connected, controlling the change-over switch module to change the connection path between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip into correct connection.
A third aspect of the embodiment of the present application provides a liquid crystal display, including an embedded display interface and an interface switching circuit provided in the first aspect.
A fourth aspect of the embodiments of the present application provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the steps of the interface switching method provided in the second aspect.
The interface switching circuit provided by the first aspect of the embodiment of the application is applied to a liquid crystal display screen, and comprises a main control chip and a switching switch module; the main control chip is connected with the switching switch module; by configuring the master chip to: is connected with the embedded display interface; detecting whether a connecting channel between an auxiliary channel of the embedded display interface and an auxiliary channel of the main control chip is reversely connected; if the connection path between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip is reversely connected, outputting a channel signal source selection signal to the change-over switch module; the switcher module is configured to: is connected with the embedded display interface; according to the signal source selection signal, the connection path between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip is switched to be correctly connected, and the connection path can be automatically corrected when the auxiliary signal output end of the auxiliary channel embedded in the display interface is reversely connected with the auxiliary signal input end, so that the liquid crystal display screen can normally display.
It will be appreciated that the advantages of the second to fourth aspects may be found in the relevant description of the first aspect and are not repeated here.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a first configuration of an interface switching circuit according to a first embodiment of the present application;
fig. 2 is a schematic diagram of a second configuration of an interface switching circuit according to a first embodiment of the present application;
fig. 3 is a schematic diagram of a third configuration of an interface switching circuit according to a first embodiment of the present application;
Fig. 4 is a schematic diagram of a fourth configuration of an interface switching circuit according to a first embodiment of the present application;
fig. 5 is a schematic diagram of a fifth configuration of an interface switching circuit according to a first embodiment of the present application;
fig. 6 is a sixth schematic diagram of an interface switching circuit according to a first embodiment of the present application;
Fig. 7 is a flowchart of an interface switching method according to an embodiment of the application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
It should also be understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Furthermore, the terms "first," "second," "third," and the like in the description of the present specification and in the appended claims, are used for distinguishing between descriptions and not necessarily for indicating or implying a relative importance.
Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the invention. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.
Example 1
The liquid crystal display generally includes a power panel, a voltage source conversion panel, a main board, a timing control board, a display panel, a data driving board, a scan driving board, a backlight assembly, a high voltage board, and the like. The voltage source conversion board comprises a voltage source conversion circuit and is used for providing working voltage for a main board, a time sequence control board, a data driving board, a scanning driving board, a high-voltage board and the like and generating common voltage. The motherboard includes Transition-minimized DIFFERENTIAL SIGNALING (TMDS) receiver, analog-to-digital converter, clock generator, master control chip (Scaler), microcontroller circuit, embedded display interface, etc. The microcontroller circuit typically includes a micro control unit (Microcontroller Unit, MCU) and memory, etc. The timing control board includes a timing controller (TCON, timing Controller), a data clock recovery (Clock and Data Recovery, CDR) circuit, and the like. The data driving board includes a data driving module, which may be a Source Driver Chip (Source Driver IC) or a thin Film Source Driver Chip (S-COF), etc. The scan driving board includes a Gate driving module, which may be a Gate driving Chip (GATE DRIVER IC) or a thin Film Gate driving Chip (G-COF), etc. The high voltage board may include an inverter circuit for supplying power to the backlight assembly.
The first embodiment of the application provides an interface switching circuit which is applied to a liquid crystal display screen, and can ensure that an auxiliary signal output end and an auxiliary signal input end of an auxiliary channel of an embedded display interface can normally display even if the auxiliary signal output end and the auxiliary signal input end of the auxiliary channel of the embedded display interface are connected reversely when the auxiliary channel of the embedded display interface is connected reversely with the corresponding wiring end of a time sequence controller, and the auxiliary signal output end and the auxiliary signal input end of the auxiliary channel of the embedded display interface are connected reversely when the auxiliary channel of the embedded display interface is connected reversely with the corresponding wiring end of the time sequence controller.
As shown in fig. 1, an interface switching circuit provided in an embodiment of the present application includes a main control chip 1 and a switch module 2;
the main control chip 1 is connected with the change-over switch module 2;
The main control chip 1 is configured to:
Is connected with the embedded display interface 3;
Detecting whether a connecting channel between an auxiliary channel AUX of the embedded display interface 3 and an auxiliary channel AUX of the main control chip 1 is reversely connected;
If the connection path between the auxiliary channel AUX of the embedded display interface 3 and the auxiliary channel AUX of the main control chip 1 is reversely connected, outputting a channel signal source selection signal to the change-over switch module 2;
the switcher module 2 is configured to:
is connected with an auxiliary channel AUX of the embedded display interface 3;
And switching the connection path between the auxiliary channel AUX of the embedded display interface 3 and the auxiliary channel AUX of the main control chip 1 into correct connection according to the signal source selection signal.
In application, the main control chip may be the main control chip of the motherboard. The change-over switch module can be realized through a change-over switch chip, a device or a circuit, and is used for being connected between an auxiliary channel of the main control chip and an auxiliary channel embedded in the display interface, and can realize the switching between the forward connection and the reverse connection of the auxiliary channel of the main control chip and the auxiliary channel embedded in the display interface under the control of the main control chip, so that a connecting channel can be corrected under the control of the main control chip when the auxiliary signal output end and the auxiliary signal input end of the auxiliary channel embedded in the display interface are reversely connected with corresponding wiring terminals of the time sequence control board.
In applications, the source selection signal may be active high or active low. When the signal source selection signal is high-level effective, the main control chip can control the change-over switch module to switch the connection path between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip by outputting the high-level signal source selection signal; when the signal source selection signal is effective in low level, the main control chip can control the change-over switch module to switch the connection path between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip by outputting the signal source selection signal in low level.
In one embodiment, the master chip is configured to:
detecting whether a hot plug detection signal is received through an embedded display interface;
If the hot plug detection signal is not received through the embedded display interface, determining that the connection path between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip is reversely connected.
In application, the starting-up principle of the liquid crystal display is as follows:
When the power supply of the power panel is started, after the main board is electrified, the voltage of the time sequence control panel of the liquid crystal display screen can gradually rise until the voltage is stable;
After the voltage of the time sequence controller is stabilized, the time sequence controller generates two signals to be sent to a main control chip, one is a high-level Hot Plug detection Signal (Hot Plug DETECT SIGNAL) and the other is a clock locking Signal (CDR Lock Signal), and after a data clock recovery circuit of the time sequence controller works normally, the Hot Plug detection Signal is pulled down by the time sequence controller;
the main control chip sends a clock signal to the time sequence controller after detecting the low level of the hot plug detection signal;
After the data clock recovery circuit locks the clock, the time sequence controller pulls down the clock locking signal, the main control chip sends effective data (VALID DATA) to the time sequence controller through the embedded display interface after detecting the low level of the clock locking signal, and the time sequence data board controls the data driving board to output data voltage to the display panel when receiving the effective data;
The main control chip controls the backlight source assembly to be lightened after a period of time, so that the liquid crystal display screen can normally display.
In application, when the auxiliary channel of the embedded display interface is correctly connected with the corresponding wiring terminal of the timing control board, the timing controller generates high-level and low-level hot plug detection signals to be sent to the main control chip, so that whether the hot plug detection signals are received through the embedded display interface or not is detected, whether the wiring between the auxiliary channel of the embedded display interface and the corresponding wiring terminal of the timing control board is reversely connected can be determined, if the hot plug detection signals are not detected, the wiring between the auxiliary channel of the embedded display interface and the corresponding wiring terminal of the timing control board is reversely connected, and therefore, the connection path between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip is reversely connected, and the connection path between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip is switched to be correctly connected through the switch module, so that the auxiliary signals can be correctly transmitted between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip.
As shown in fig. 2, in one embodiment, one auxiliary channel AUX of the main control chip 1 is connected to two signal source input terminals HSD1 and HSD2 of the switch module 2, a selection output terminal SWAP of the main control chip 1 is connected to a selection input terminal S of the switch module 2, and a hot plug detection terminal HPD of the main control chip 1 is configured to be connected to a hot plug detection terminal HPD of the embedded display interface 3;
the signal source output end D of the change-over switch module 2 is connected with a signal source input end HSD1 or HSD2 and is configured to be connected with an auxiliary channel AUX of the embedded display interface 3;
The main control chip 1 is configured to:
Detecting whether a connecting channel between an auxiliary channel AUX of the embedded display interface 3 and an auxiliary channel AUX of the main control chip 1 is reversely connected according to a hot plug detection signal of a hot plug detection end HPD of the embedded display interface 3;
if the connection path between the auxiliary channel AUX of the embedded display interface 3 and the auxiliary channel AUX of the main control chip 1 is reversely connected, outputting a channel signal source selection signal to a selection input end S of the change-over switch module 2;
the switcher module 2 is configured to:
If one signal source input end HSD1 of the change-over switch module 2 is set to be connected with the signal source output end D by default, the signal source output end D is switched to be connected with the other signal source input end HSD2 according to a signal source selection signal, so that a connecting channel between an auxiliary channel AUX of the embedded display interface 3 and an auxiliary channel AUX of the main control chip 1 is correctly connected;
if one signal source input end HSD2 of the change-over switch module 2 is set to be connected with the signal source output end D by default, the signal source output end D is switched to be connected with the other signal source input end HSD1 according to the signal source selection signal, so that a connection path between the auxiliary channel AUX of the embedded display interface 3 and the auxiliary channel AUX of the main control chip 1 is correctly connected.
In application, the number of the auxiliary channels of the main control chip can be one or more. The number of auxiliary channels of the main control chip, the number of the change-over switch modules and the number of the auxiliary channels of the embedded display interface comprise the following three conditions:
In the first case, the number of the switch modules, the number of the auxiliary channels of the embedded display interface and the number of the auxiliary channels of the main control chip are equal;
in the second case, the number of the auxiliary channels of the main control chip is equal to the number of the change-over switch modules and is smaller than the number of the auxiliary channels of the embedded display interface;
In the third case, the number of the auxiliary channels of the main control chip is equal to the number of the change-over switch modules and is larger than the number of the auxiliary channels of the embedded display interface.
In the application, in the second case, the redundancy exists in the auxiliary channel of the embedded display interface, and when the main control chip, the change-over switch module and the embedded display interface are applied to the liquid crystal display screen, the redundant auxiliary channel of the embedded display interface is not used in an empty state; in the third case, the auxiliary channel and the switch module of the main control chip are redundant, and when the main control chip, the switch module and the embedded display interface are applied to the liquid crystal display, the redundant auxiliary channel and the redundant switch module of the main control chip are not empty.
Fig. 2 illustrates a case where the number of auxiliary channels of the main control chip, the number of switch modules, and the number of auxiliary channels of the embedded display interface are all one.
As shown in fig. 3, in one embodiment, the interface switching circuit includes a plurality of switch modules 2, and the main control chip 1 and the embedded display interface 2 include a plurality of auxiliary channels AUX;
an auxiliary channel AUX of the main control chip 1 is connected with two signal source input ends HSD1 and HSD2 of a change-over switch module 2;
the signal source output D of the switcher module 2 is configured to be connected to an auxiliary channel AUX of the embedded display interface 3.
Fig. 3 exemplarily shows a case where the number of auxiliary channels of the main control chip, the number of switch modules, and the number of auxiliary channels of the embedded display interface are two.
In one embodiment, the main control chip and the embedded display interface each comprise m main channels, the main control chip and the embedded display interface each comprise n auxiliary channels, and the number of the switch modules is n;
when m is equal to 2 or 4, n is equal to 1;
When m is equal to 8, n is equal to 2.
In application, the number of auxiliary channels of the main control chip, the number of the change-over switch modules and the number of the auxiliary channels of the embedded display interface can be set according to the numbers of the main control chip and the main channels of the embedded display interface, and the resolution of the liquid crystal display screen is higher as the number of the main channels is larger. Typically 2 or 4 main channels, corresponding to 1 auxiliary channel and 1 switch-diverter switch module.
As shown in fig. 4 and 5, in one embodiment, one auxiliary channel AUX of the main control chip 1 and the embedded display interface 3 includes an auxiliary signal output terminal AUXP and an auxiliary signal input terminal AUXN;
the signal source input end HSD1 of the change-over switch module 2 comprises a positive signal source input end HSD1+ and a negative signal source input end HSD1-, the signal source input end HSD2 comprises a positive signal source input end HSD2+ and a negative signal source input end HSD2-, and the signal source output end D of the change-over switch module 2 comprises a positive signal source output end D+ and a negative signal source output end D-;
An auxiliary signal output terminal AUX of one auxiliary channel AUX of the main control chip 1 is connected with a negative signal source input terminal HSD 1-of one signal source input terminal HSD1 of one switching switch module 2 and a positive signal source input terminal hsd2+ of the other signal source input terminal HSD2, and an auxiliary signal input terminal AUXN of one auxiliary channel AUX of the main control chip 1 is connected with a positive signal source input terminal hsd1+ of the other signal source input terminal HSD1 of the one switching switch module 2 and a negative signal source input terminal HSD 2-of the other signal source input terminal HSD 2;
The positive signal source output end D+ and the negative signal source output end D-of the signal source output end D of the change-over switch module 2 are set to be respectively connected with the positive signal source input end HSD1+ and the negative signal source input end HSD 1-of one signal source input end HSD1 in a one-to-one correspondence manner, or are set to be connected with the positive signal source input end HSD2+ and the negative signal source input end HSD 2-of the other signal source input end HSD2 in a one-to-one correspondence manner by default;
The positive signal source output d+ and the negative signal source output D-of the signal source output D of the switcher module 2 are configured to be connected in one-to-one correspondence with the auxiliary signal output AUXP and the auxiliary signal input AUXN of one auxiliary channel AUX of the embedded display interface 3, respectively.
Fig. 4 illustrates a case where the number of auxiliary channels of the main control chip, the number of the switch modules, and the number of the auxiliary channels of the embedded display interface are all one on the basis of fig. 2.
Fig. 5 illustrates, on the basis of fig. 3, a case in which the number of auxiliary channels of the main control chip, the number of switch modules, and the number of auxiliary channels of the embedded display interface are two.
As shown in fig. 6, in one embodiment, the switch module 2 in fig. 4 and 5 includes a switch unit 21, a pull-down unit 22, and a filter unit 23;
The positive signal source input end hsd1+ and the negative signal source input end HSD1-, the positive signal source input end hsd2+ and the negative signal source input end hsd2-, the positive signal source output end d+ and the negative signal source output end D-and the selection input end S of the signal source input end HSD1 of the switch unit 21 are the positive signal source input end hsd1+ and the negative signal source input end HSD1-, the positive signal source input end hsd2+ and the negative signal source input end HSD2-, the positive signal source output end d+ and the negative signal source output end D-and the selection input end S of the signal source output end D of the switch module 2, respectively;
The output enable end OE of the change-over switch unit 21 is grounded through the pull-down unit 22;
The power supply end VCC of the change-over switch unit 21 is connected to the power supply VCC and is grounded through the filter unit 23;
the ground GND of the switch unit 21 is grounded.
In an application, the switching unit may be implemented by a switching chip or a circuit, for example, a high-speed switching chip SGM7227. The pull-down unit may be implemented by at least one pull-down resistor, and when the pull-down unit is implemented by a plurality of pull-down resistors, the plurality of pull-down resistors are connected in series. The filter unit may be implemented by at least one filter capacitor, and when the filter unit is implemented by a plurality of filter capacitors, the plurality of filter capacitors are connected in parallel.
In fig. 6, the pull-down unit 22 is exemplarily shown to be implemented by a pull-down resistor, and the filter unit 23 is implemented by a filter capacitor.
Example two
As shown in fig. 7, a second embodiment of the present application provides an interface switching method, which is applied to a main control chip of a liquid crystal display, and can be executed by the main control chip when running a corresponding computer program, and the method includes steps S101 and S102 as follows:
Step S101, detecting whether a connection channel between an auxiliary channel of an embedded display interface and an auxiliary channel of a main control chip is reversely connected;
step S102, if the connection path between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip is reversed, the control switch module switches the connection path between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip to be correctly connected.
In application, when the main control chip is reversely connected with the connection channel between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip, a signal source selection signal is output to the switching control module, and the switching control module is controlled to switch the connection channel between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip through the signal source selection signal.
In one embodiment, step S101 includes:
Detecting whether a hot plug detection signal is received through the embedded display interface;
if the hot plug detection signal is not received through the embedded display interface, determining that a connection path between an auxiliary channel of the embedded display interface and an auxiliary channel of the main control chip is reversely connected.
In application, the main control chip and the switch module together form an interface switching circuit in the first embodiment. By improving the functions of the main control chip in the existing liquid crystal display screen and combining the switch modules with the same number as the auxiliary channels of the main control chip, the switching of the connection paths between the auxiliary channels of the embedded display interface and the auxiliary channels of the main control chip can be realized, when the corresponding wiring terminals of the auxiliary channels of the embedded display interface and the timing controller are reversed, the physical connection between the auxiliary channels of the embedded display interface and the corresponding wiring terminals of the timing controller does not need to be changed in hardware, and the connection paths between the auxiliary channels of the embedded display interface and the auxiliary channels of the main control chip are automatically switched to be correctly connected only by the interface switching method realized based on the main control chip, so that auxiliary signals can be correctly transmitted between the auxiliary channels of the embedded display interface and the auxiliary channels of the main control chip, and when the auxiliary signal output ends and the auxiliary signal input ends of the auxiliary channels of the embedded display interface are connected reversely, the liquid crystal display screen can normally display even if the auxiliary signal output ends of the auxiliary channels of the embedded display interface are connected reversely, and the screen matching line difficulty of the liquid crystal display screen is simplified.
It should be noted that, because the content of information interaction and execution process between the steps of the method and the circuit embodiment of the present application are based on the same concept, specific functions and technical effects thereof can be found in the circuit embodiment section, and the details are not repeated here.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to perform all or part of the functions described above. The functional modules in the embodiment may be integrated in one processing module, or each module may exist alone physically, or two or more modules may be integrated in one module, where the integrated modules may be implemented in a form of hardware or a form of software functional modules. In addition, the specific names of the functional modules are only for distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
The embodiment of the application also provides a liquid crystal display screen which comprises an embedded display interface and the interface switching circuit.
The embodiment of the application also provides a computer readable storage medium, wherein a computer program is stored in the computer readable storage medium, and when the computer program is executed by a processor, the steps in the above-mentioned interface switching method embodiment can be realized.
The embodiment of the application provides a computer program product, which enables a server to realize the steps in the interface switching method embodiment when the computer program product runs on a main control chip.
The integrated modules, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the present application may implement all or part of the flow of the method of the above-described embodiments, and may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of the method embodiments described above. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, executable files or in some intermediate form, etc. The computer readable medium may include at least: any entity or device capable of carrying computer program code to a data acquisition terminal or client, recording medium, computer Memory, read-Only Memory (ROM), random access Memory (RAM, random Access Memory), electrical carrier signals, telecommunications signals, and software distribution media. Such as a U-disk, removable hard disk, magnetic or optical disk, etc.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed circuits/apparatuses and methods may be implemented in other manners. For example, the circuit/apparatus embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the present application may implement all or part of the flow of the method of the above embodiment, or may be implemented by instructing related hardware by a computer program, where the computer program may be stored in a computer readable storage medium, and the computer program may implement the steps of each of the method embodiments described above when executed by a drive board. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium contains content that can be appropriately scaled according to the requirements of jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is subject to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (10)
1. An interface switching circuit is characterized by being applied to a liquid crystal display screen, and comprises a main control chip and a switching switch module;
The main control chip is connected with the change-over switch module;
the master control chip is configured to:
is connected with the embedded display interface;
Detecting whether a connecting channel between an auxiliary channel of the embedded display interface and an auxiliary channel of the main control chip is reversely connected;
if the connection path between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip is reversely connected, outputting a channel signal source selection signal to the change-over switch module;
The switcher module is configured to:
the auxiliary channel is connected with the embedded display interface;
And switching a connection channel between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip into correct connection according to the signal source selection signal.
2. The interface switching circuit of claim 1, wherein an auxiliary channel of the main control chip is connected with two signal source input ends of the switch module, a selection output end of the main control chip is connected with a selection input end of the switch module, and a hot plug detection end of the main control chip is configured to be connected with a hot plug detection end of the embedded display interface;
The signal source output end of the change-over switch module is connected with a signal source input end and is configured to be connected with an auxiliary channel of the embedded display interface;
the master control chip is configured to:
detecting whether a connection channel between an auxiliary channel of the embedded display interface and an auxiliary channel of the main control chip is reversely connected or not according to a hot plug detection signal of a hot plug detection end of the embedded display interface;
If the connection path between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip is reversely connected, outputting a channel signal source selection signal to the selection input end of the change-over switch module;
The switcher module is configured to:
And switching the signal source output end to be connected with the other signal source input end according to the signal source selection signal so as to enable the connection passage between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip to be connected correctly.
3. The interface switching circuit of claim 2, comprising a plurality of said switch modules, said master control chip and said embedded display interface comprising a plurality of auxiliary channels;
an auxiliary channel of the main control chip is connected with two signal source input ends of one change-over switch module;
the signal source output end of the change-over switch module is configured to be connected with an auxiliary channel of the embedded display interface.
4. The interface switching circuit of claim 2 or 3, wherein one auxiliary channel of the main control chip and the embedded display interface includes an auxiliary signal output terminal and an auxiliary signal input terminal;
Each signal source input end of the change-over switch module comprises a positive signal source input end and a negative signal source input end, and the signal source output end of the change-over switch module comprises a positive signal source output end and a negative signal source output end;
an auxiliary signal output end of an auxiliary channel of the main control chip is connected with a negative signal source input end of one signal source input end and a positive signal source input end of the other signal source input end of the change-over switch module, and an auxiliary signal input end of the auxiliary channel of the main control chip is connected with a positive signal source input end and a negative signal source input end of the other signal source input end of the change-over switch module;
The positive signal source output end and the negative signal source output end of the change-over switch module are respectively connected with the positive signal source input end and the negative signal source input end of one signal source input end in one-to-one correspondence, or are respectively connected with the negative signal source input end and the positive signal source input end of one signal source input end in one-to-one correspondence;
The positive signal source output end and the negative signal source output end of the change-over switch module are respectively configured to be connected with the auxiliary signal output end and the auxiliary signal input end of one auxiliary channel of the embedded display interface in a one-to-one correspondence mode.
5. The interface switching circuit according to claim 4, wherein the switch module comprises a switch unit, a pull-down unit, and a filter unit;
The signal source input end, the signal source output end and the selection input end of the change-over switch unit are respectively a signal source input end, a signal source output end and a selection input end of the change-over switch module;
the output enabling end of the change-over switch unit is grounded through the pull-down unit;
The power supply end of the change-over switch unit is connected with a power supply and is grounded through the filtering unit;
The grounding terminal of the change-over switch unit is grounded.
6. The interface switching circuit of claim 2 or 3, wherein the master control chip is configured to:
Detecting whether a hot plug detection signal is received through the embedded display interface;
if the hot plug detection signal is not received through the embedded display interface, determining that a connection path between an auxiliary channel of the embedded display interface and an auxiliary channel of the main control chip is reversely connected.
7. An interface switching method is characterized by being applied to a main control chip of a liquid crystal display screen, and comprises the following steps:
Detecting whether a connecting channel between an auxiliary channel of the embedded display interface and an auxiliary channel of the main control chip is reversely connected;
and if the connection path between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip is reversely connected, controlling the change-over switch module to change the connection path between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip into correct connection.
8. The interface switching method as claimed in claim 7, wherein the detecting whether the connection path between the auxiliary channel of the embedded display interface and the auxiliary channel of the main control chip is reversed comprises:
Detecting whether a hot plug detection signal is received through the embedded display interface;
if the hot plug detection signal is not received through the embedded display interface, determining that a connection path between an auxiliary channel of the embedded display interface and an auxiliary channel of the main control chip is reversely connected.
9. A liquid crystal display screen comprising an embedded display interface and an interface switching circuit as claimed in any one of claims 1 to 6.
10. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when executed by a processor, implements the steps of the interface switching method according to claim 7 or 8.
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