CN113066420A

CN113066420A - Display panel control method and device and display equipment

Info

Publication number: CN113066420A
Application number: CN202110340972.5A
Authority: CN
Inventors: 康彩亮
Original assignee: Lenovo Beijing Ltd
Current assignee: Lenovo Beijing Ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2021-07-02
Anticipated expiration: 2041-03-30
Also published as: CN113066420B

Abstract

The application provides a display panel control method, a display panel control device and display equipment, under the condition that a display panel to be identified is connected to a main board, preset driving current is sent to the display panel to be identified to control the display panel to be identified to enter a preparation state to operate, impedance voltage is generated, then, a driving signal corresponding to the current impedance voltage can be determined by obtaining the current impedance voltage of the display panel to be identified, and the driving signal is a target driving signal of the display panel to be identified, so that the target driving signal is transmitted to the display panel to be identified, the display panel to be identified can be controlled to enter a target state to operate, and application requirements are met. Therefore, the method for determining the target driving signal required by the display panel to be identified ensures that the same main board can support display panels of infinite categories; and under the scene of display panel access or replacement, developers are not required to change the design deployment of the bottom layer of the mainboard, so that the cost and the complexity of service are reduced.

Description

Display panel control method and device and display equipment

Technical Field

The present disclosure relates to the field of display control, and more particularly, to a display panel control method and apparatus, and a display device.

Background

In practical applications, in display devices such as televisions, mobile phones, computers, smartwatches, and independent displays, in order to meet display configuration requirements of different services, a main board is generally required to support different types of display panels, and the display panels are controlled to normally operate by sending required target driving signals to the display panels actually connected to the main board.

In the process of determining the target driving signal, the type of the display panel connected to the backlight Cable is generally identified by detecting level signals of a plurality of pins electrically connected to the backlight Cable, so that the preset driving signal corresponding to the display panel of the type is determined as the target driving signal, and the control of the display panel is realized.

Therefore, the control method needs to configure a backlight Cable for each display panel to determine the identification signal (e.g., the level signal of a plurality of pins) of the display panel, and the operation is complex; because the number of pins configured on the mainboard is limited, the number of the combination of the level signals output by each pin is limited, so that the number of the display panels supported by the mainboard is limited; in addition, in the scene of display panel access or replacement, developers are required to change the design deployment of the motherboard bottom layer, so that the service time and the cost are increased.

Disclosure of Invention

In view of this, the present application provides the following technical solutions:

in one aspect, the present application provides a display panel control method, including:

the method comprises the steps of conveying preset driving current to a display panel to be identified so as to control the display panel to be identified to enter a preparation state to operate;

acquiring the current impedance voltage of the display panel to be identified;

determining a target driving signal of the display panel to be identified corresponding to the current impedance voltage;

and transmitting the target driving signal to the display panel to be identified so as to control the display panel to be identified to enter a target state for operation.

In some embodiments, the supplying the preset driving current to the display panel to be identified includes:

acquiring signal change information generated by a panel connection detection interface on a mainboard;

according to the signal change information, determining that the panel connection detection interface is connected with the display panel to be identified;

and controlling a backlight driver to output a preset driving current, and transmitting the preset driving current to the display panel to be identified.

In some embodiments, the determining the target driving signal of the display panel to be identified corresponding to the current impedance voltage includes:

acquiring a first corresponding relation between impedance voltages of different display panels under the condition of inputting the preset driving current and driving signals required by the different display panels;

and inquiring the first corresponding relation, and determining the driving signal corresponding to the current impedance voltage as a target driving signal of the display panel to be identified.

In some embodiments, the first corresponding relationship between the impedance voltage of the different display panels when the preset driving current is input and the driving signals required by the different display panels includes:

a second corresponding relationship between impedance voltages and driving currents of different display panels when the preset driving current is input, wherein the impedance voltages are generated when the preset driving current is input to the corresponding display panel;

and the impedance voltage of the different display panels under the condition of inputting the preset driving current and the different display driving signals correspond to each other in a third way.

In some embodiments, the querying the first corresponding relationship and determining the driving signal corresponding to the current impedance voltage as the target driving signal of the display panel to be identified includes:

the first controller inquires the second corresponding relation and determines that the driving current of the display panel corresponding to the current impedance voltage is a target driving current;

the second controller inquires the third corresponding relation and determines that the display driving signal of the display panel corresponding to the current impedance voltage is a target display driving signal;

the transmitting the target driving signal to the display panel to be identified includes:

the first controller controls a backlight driver to output the target driving current, and the target driving current is transmitted to the display panel to be identified so as to control the backlight brightness of the display panel to be identified to reach target brightness;

and the second controller sends the target display driving signal to the display panel to be identified so as to control the display panel to be identified to display the target color.

In some embodiments, the querying the third corresponding relationship by the second controller to determine that the display driving signal of the display panel corresponding to the current impedance voltage is the target display driving signal includes:

the second controller receives the current impedance voltage sent by the first controller or a panel mark of a display panel corresponding to the current impedance voltage;

and the second controller inquires the third corresponding relation and determines the display driving signal corresponding to the current impedance voltage or the panel identification as a target display driving signal.

In yet another aspect, the present application also proposes a display panel control apparatus, the apparatus including:

the device comprises a preset driving current conveying module, a display panel identification module and a control module, wherein the preset driving current conveying module is used for conveying preset driving current to the display panel to be identified so as to control the display panel to be identified to enter a preparation state to operate;

the impedance voltage acquisition module is used for acquiring the current impedance voltage of the display panel to be identified;

the target driving signal determining module is used for determining a target driving signal of the display panel to be identified corresponding to the current impedance voltage;

and the target driving signal transmission module is used for transmitting the target driving signal to the display panel to be identified so as to control the display panel to be identified to enter a target state for operation.

In yet another aspect, the present application further proposes a display apparatus, including:

a main board; a display panel;

a panel connector disposed on the motherboard and connected to the display panel;

the control device is arranged on the mainboard and connected with the panel connector, and comprises a conversion control unit and a signal control unit:

the conversion control unit is used for connecting the panel connector, forming a first path with the display panel, transmitting a driving current to the display panel and reading the current impedance voltage of the display panel;

the signal control unit is used for connecting the conversion control unit and the panel connector and forming a second passage with the display panel;

the signal control unit controls the conversion control unit to output a preset driving current, receives the current impedance voltage read by the conversion control unit, determines a target driving signal of the display panel corresponding to the current impedance voltage, and transmits the target driving signal to the display panel through the first path and the second path so as to control the display panel to enter a target state for operation.

In some embodiments, the display panel includes: backlight unit and display module assembly:

the backlight module is used for connecting a first connecting port of the panel connector;

the display module is used for connecting a second connector of the panel connector;

the conversion control unit is specifically used for connecting the first connecting port and forming the first channel with the backlight module;

the signal control unit includes a first controller and a second controller, wherein:

the first controller is used for connecting the conversion control unit and a third connector of the panel connector, controlling the conversion control unit to transmit a preset driving current to the backlight module through the first channel, acquiring a current impedance voltage read by the conversion control unit, determining a target driving current of the backlight module corresponding to the current impedance voltage, and controlling the conversion control unit to transmit the target driving current to the backlight module through the first channel so as to control the backlight brightness of the backlight module to reach a target brightness;

the second controller is used for connecting the first controller and the second connector, forming a second path with the display module, receiving the current impedance voltage sent by the first controller, and transmitting a target display driving signal corresponding to the current impedance voltage to the display module through the second path so as to control the display module to display a target color.

In some embodiments, the conversion control unit comprises a backlight driver and a voltage reader, wherein:

the backlight driver is used for connecting the first controller and the first connecting port and forming the first channel with the backlight module;

the voltage reader is used for being connected with the first controller;

the display panel is provided with a panel identification interface for connecting the third connecting port, and the first controller is provided with a panel connection detection interface for connecting the third connecting port;

and under the condition that the panel connection detection interface and the panel identification interface are respectively connected with the third connector to form a third channel, the panel connection detection interface generates signal change information to indicate the first controller to control the backlight driver to output preset driving current, and the voltage reading circuit reads the current impedance voltage of the display panel.

Therefore, the application provides a display panel control method, a display panel control device and display equipment, under the condition that a display panel to be identified is connected to a main board, a preset driving current is sent to the display panel to be identified to control the display panel to be identified to enter a preparation state to operate, impedance voltage is generated, then a driving signal corresponding to the current impedance voltage can be determined by obtaining the current impedance voltage of the display panel to be identified, and the driving signal is a target driving signal of the display panel to be identified, so that the display panel to be identified can be controlled to enter a target state to operate by transmitting the target driving signal to the display panel to be identified, and application requirements are met. Therefore, in the process of determining the target driving signal required by the display panel to be identified, the method does not depend on the combination of high and low level signals of the display panel connected to the plurality of connectors of the main board, does not need to configure a cable for each type of display panel, simplifies the operation complexity, and does not limit the number of types of display panels supported by the main board, namely the same main board can support display panels of infinite types; under the scene of display panel access or replacement, direct access can be achieved, developers are not required to change the design and deployment of the bottom layer of the main board, and the cost and complexity of service are reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic diagram of a hardware configuration of an alternative example of a display device adapted to the display panel control method and apparatus proposed in the present application;

fig. 2 is a schematic diagram of a hardware configuration of still another alternative example of a display device adapted to the display panel control method and apparatus proposed in the present application;

FIG. 3 is a schematic diagram of a hardware configuration of yet another alternative example of a display device adapted to the display panel control method and apparatus proposed in the present application;

FIG. 4 is a schematic diagram of a hardware configuration of yet another alternative example of a display device adapted to the display panel control method and apparatus proposed in the present application;

fig. 5 is a schematic flowchart of an alternative example of a display panel control method proposed in the present application;

fig. 6 is a signaling flow diagram illustrating another alternative example of the display panel control method proposed in the present application;

fig. 7a is a schematic diagram illustrating an alternative representation of correspondence between different impedance voltages of different display panel types under a preset driving current and different target driving currents in a display panel control method according to the present application;

FIG. 7b is a schematic diagram of target display driving signals required by a display panel to display a target color according to the display panel control method of the present application;

FIG. 7c is a schematic diagram of a target display driving signal required by another display panel to display a target color, which is suitable for the display panel control method of the present application;

fig. 8 is a schematic structural diagram of an alternative example of the display panel control device provided in the present application.

Detailed Description

To solve the problems of the background art, the present application proposes to identify the type of the display panel connected to the backlight Cable no longer according to the high-low level combination of the plurality of pins connected to the backlight Cable (Cable), thereby solving various problems caused by the display panel category implementation manner. Specifically, it can be known through analyzing the distinguishing characteristics of different display panels that the impedances of different display panels are often different, so that the type of the display panel can be determined by obtaining the impedance of the connected display panel, and then the driving current and the display signal required by the display panel are determined, and the display panel is controlled to normally work.

However, the implementation of the impedance obtaining method of the display panel is not easy, and the application further proposes to convert the electrical property of the impedance into a voltage electrical property parameter, so as to achieve the purpose of identifying the display panel by using the characteristic that the impedance voltage of the display panel is easier to obtain. Specifically, the corresponding relationship between different impedances and different display panels can be converted into the corresponding relationship between different impedance voltages and different display panels according to an operation principle that the current is multiplied by the impedance to be equal to the voltage, wherein the impedance voltage of each display panel can be obtained by multiplying the corresponding impedance by a preset driving current, the preset driving current is greater than or equal to the minimum driving current for ensuring that each type of display panel is successfully started to work, and the specific numerical value is not limited.

Based on this, in practical application, for a display panel connected to a main board in an electronic system, a preset driving current may be directly transmitted to the display panel, so as to turn on the backlight of the display panel, and then, the impedance voltage generated by the display panel at this time may be read, and the type of the connected display panel may be determined according to the corresponding relationship between the preset different impedance voltages and the different display panels, so as to determine a target driving signal, such as a target driving current, a target display driving signal, etc., required for the normal operation of the display panel.

Therefore, in the display panel control method provided by the application, the number of pins of the display panel connected to the mainboard and the high/low level of each pin are not depended on, various problems caused by the pins can be avoided, in the scene of display panel connection or replacement, a new display panel can be accurately identified directly according to the display panel control method provided by the application, a required target driving signal is provided for the new display panel, developers are not required to change the design and the arrangement of the bottom layer of the mainboard, the service cost is saved, and the working efficiency is improved.

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments, so that the drawings only show the parts related to the related inventions, and the embodiments and features in the embodiments in the present application can be combined with each other without conflict, that is, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts based on the embodiments in the present application belong to the protection scope of the present application.

It should be understood that "system", "apparatus", "unit" and/or "module" as used herein is a method for distinguishing different components, elements, parts or assemblies at different levels. However, other words may be substituted by other expressions if they accomplish the same purpose.

As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements. An element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

In the description of the embodiments herein, "/" means "or" unless otherwise specified, for example, a/B may mean a or B; "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more than two. The terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Additionally, flow charts are used herein to illustrate operations performed by systems according to embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed in the exact order in which they are performed. Rather, the various steps may be processed in reverse order or simultaneously. Meanwhile, other operations may be added to the processes, or a certain step or several steps of operations may be removed from the processes.

Referring to fig. 1, a schematic diagram of a hardware structure of an alternative example of a display device adapted to the display panel control method and apparatus proposed in the present application may include, but is not limited to: independent display/display screen, smart mobile phone, panel computer, netbook, mobile unit, desktop computer etc. this application does not do the restriction to this display device's product type, and can decide as the circumstances.

As shown in fig. 1, the display apparatus may include: mainboard 100, display panel 200, panel connector 300 and controlling means 400, wherein:

the main board 100 is one of the most basic and important components of the display device. The display device is generally a rectangular circuit board, on which main circuit systems forming the display device, such as a BIOS (Basic Input/Output System) chip, an I/O control chip, a panel control switch interface, an indicator light connector, an expansion slot, a main board, and a dc power supply connector of a plug-in card, and the like, may be mounted. The structure, the shape and the like of the main board in the display equipment are not limited, and the main board can be determined according to the actual requirements of real equipment.

The display panel 200 may be a component that implements a content display function of the display device. In practical applications, target driving signals, such as driving currents and display driving signals, required for implementing functions of different types of display panels 200 are often different, and detailed correspondence between different display panels 200 and the required target driving signals is not described herein, and may be determined according to circumstances.

The panel connector 300 may be disposed on the motherboard 100 and can be connected to the display panel 200, that is, when determining a display panel of a type required by the display device and connecting the display panel to the motherboard 100, the display panel 200 is usually connected to the panel connector 300 on the motherboard 100 to implement data interaction between the motherboard 100 and the display panel 200, and a specific connection manner is not limited in this application.

In a possible implementation manner, since the communication manner between the motherboard 100 and the display panel 200 is not unique, such as transmission of driving current, transmission of display driving signal, transmission of display panel connection/disconnection signal, etc., in order to satisfy the transmission of these different data, the panel connector 300 may include a plurality of connectors, such as an interface connector including a plurality of pins, and the present application does not limit the type and the composition of the panel connector 300, as the case may be.

The control device 400 may be disposed on the motherboard 100 and connected to the panel connector 300, so that the control device 400 can be electrically connected to the display panel 200 connected to the panel connector 300 through the panel connector 300, thereby implementing display control of the display panel.

As shown in fig. 1, the control device 400 may include a switching control unit 410 and a signal control unit 420. The conversion control unit 410 may be connected to the panel connector 300 to form a first path with the display panel 200, so as to supply a driving current to the display panel 200 through the first path to drive the backlight of the display panel 200 to be lit in the display panel control process, which may be described in corresponding parts of the method embodiments below.

Furthermore, in order to enable the control device to identify the type of the display panel 200 currently connected to the panel connector 300 to determine the required target driving signal, and control the display panel 200 to operate normally, the conversion control unit may read the current impedance voltage of the display panel when the preset driving current is input to the display panel to enable the backlight thereof to be turned on, and the detailed implementation process of reading the impedance voltage is not described in detail in this application.

The signal control unit 420 in the control device 400 may connect the conversion control unit 410 and the panel connector 300 to enable the signal control unit 420 to form a second path with the display panel 200 connected to the panel connector 300, so that, after the signal control unit determines a target driving signal required for connecting the display panel 200 connected to the panel connector 300 based on the received current impedance voltage of the display panel, the target driving signal may be transmitted to the display panel 200 through the formed first path and second path to control the display panel to enter a target state for operation.

Before the control device 400 reads the current impedance voltage of the display panel 200, the type of the display panel 200 and the target driving signal required for the operation thereof are unknown, and in order to avoid that the driving signal directly transmitted to the connected display panel 200 is inappropriate under the unknown condition, which causes damage to the display panel or reduces the service life of the display panel, or fails to reach the operating state required by the user, the control device 400 needs to determine the type of the connected display panel 200 first, obtain the target driving signal required for the normal operation of the display panel 200 of the type, and then directly generate the target driving signal to be transmitted to the display panel 200, thereby ensuring the normal operation of the display panel 200.

It can be understood that different types of target driving signals can be transmitted through different paths, so that each type of target driving signal can be transmitted to the display panel through the first path or the second path, and the specific transmission process of the embodiment of the present application is not described in detail herein.

In some embodiments, referring to a schematic diagram of a hardware structure of another optional example of the display device shown in fig. 2, this embodiment may be an optional refinement structure of the hardware structure of the display device described in the foregoing embodiment, specifically, as shown in fig. 2, the display panel 200 in the display device described in the foregoing embodiment may include a backlight module 210 and a display module 220, where:

the backlight assembly 210 may be connected to the first connection port 310 of the panel connector 300.

In practical applications, the backlight module 210 is one of the key components of the display panel, and is mainly used for supplying a light source with sufficient brightness and uniform distribution, so that the backlight module can normally display images, that is, the backlight module can be a backlight light source of the whole display panel, and the backlight module 210 can be divided into different corresponding categories according to different types of light sources, such as LEDs, CCFLs (Cold Cathode Fluorescent lamps), ELs (Electro luminescence), and the like, and the light source distribution positions of the backlight modules of the different categories may be different, which is determined according to the circumstances and will not be described in detail herein.

The first connection ports 310 may include one or more connection ports, which may be determined according to a composition of a backlight cable for connecting the backlight module 210 and the panel connector 300, that is, the backlight module 210 may be connected to one or more first connection ports 310 of the panel connector 300 through the backlight cable. In order to distinguish the connectors for connecting other components, in the embodiment of the present application, the connector that is connected to the backlight module 210 among the plurality of connectors included in the panel connector 300 is referred to as a first connector 310.

In the embodiment of the present application, in combination with the related description of the display panel control process in the foregoing embodiment, in order to realize the control of the backlight module 210, as shown in fig. 2, the conversion control unit 410 is specifically connected to the first connection port 310 of the panel connector 300, so that the first path is formed between the conversion control unit 410 and the backlight module 210, which are both connected to the first connection port 310, so that the driving current output by the conversion control unit 410 can be transmitted to the backlight module 210 through the first path to control the backlight lighting of the backlight module 210, and the specific backlight driving principle is not described in detail herein.

The display module 220 may be connected to the second connector 320 of the panel connector 300.

In conjunction with the above description of the first connection interface 310, the second connection interface 320 may include one or more connection interfaces in the panel connector 300, which may be determined according to the specific communication requirements of the display module 220, and the embodiment of the present application is for convenience of description and is distinguished from the connection interfaces in the panel connector for connecting other components, so the connection interfaces for connecting the display module 220 are collectively referred to as the second connection interface 320.

Based on the above description of the signal control unit 420 and the connection relationship shown in fig. 1, the signal control unit 420 may form a second path with the display panel 200 connected to the panel connector 300 to transmit a target driving signal, so that a display driving signal for controlling the display color of the display module 220 may be transmitted through the second path on the basis of a driving signal of the same type as the driving current transmitted through the first path. Therefore, the signal control unit 420 may be connected to the second connection port 320, so that a second path is formed between the signal control unit 420 and the display module 220, both of which are connected to the second connection port 320.

Specifically, in the control application of the display panel 200, the control principle of the backlight module 210 and the control principle of the display module 220 are often different, and different controllers can be adopted to realize the control of the backlight module 210 and the control of the display module 220. Therefore, as shown in fig. 2, the signal control unit 420 may include a first controller 421 and a second controller 422, and the application does not limit the specific types of the two controllers and the operation principle thereof.

In the embodiment of the present application, as shown in fig. 2, the first controller 421 may connect the conversion control unit 410 and the third connection port 330 of the panel connector 300. Similarly to the first connector 310 and the second connector 320, the third connector 330 may include at least one connector, and may be determined according to a data line for connecting the first controller 421 to the third connector 330, and one or more connectors connected to the first controller 421 in the panel connector 300 may be referred to as the third connector 330 in order to distinguish connectors connected to other components.

In conjunction with the above-mentioned connection relationship, the first controller 421 can control the conversion control unit 410 to output the driving current, and the driving current is transmitted to the backlight module 210 through the connected first connection port 310 to control the backlight illumination. For a specific control process, reference may be made to the description of a corresponding part of the context embodiment, which is not described herein again.

As shown in fig. 2, the second controller 422 may be connected to the first controller 421 and the second connection port 320, such that the second controller 422 and the display module 220 connected to the second connection port 320 form a second path. In practical application of this embodiment, after obtaining the current impedance voltage of the display panel currently connected to the motherboard, the first controller 421 determines the type of the display panel, and then may query a target driving signal required by the operation of the display panel of the type, that is, a target driving signal corresponding to the display panel with the current impedance voltage, such as a target driving current and a target display driving signal.

Based on this, the second controller 422 can obtain the type or the current impedance voltage of the accessed display panel from the first controller 421, so as to query the target driving signal corresponding thereto, and then transmit the target driving signal to the display module 220 through the formed second path to control the display module 220 to display the target color.

In a possible implementation manner, the first Controller 421 may include, but is not limited to, an EC (Embedded Controller), and for a second corresponding relationship between the impedance voltage of the different types of display panels under the preset driving current and the target driving current of the type of display panel, the impedance voltage may be written into the first Controller 421 in advance for storage, or an independent memory may be configured for storage, which is not limited in this application. It is understood that in a scenario where a separate memory is configured, the first controller 421 may be connected to the memory to read the target driving current and the like recorded in the memory corresponding to the current impedance voltage, and a specific circuit connection relationship is not described in detail in this application.

The second controller 422 may include, but is not limited to, a scaler display controller. For the third corresponding relationship between different types of display panels (which can be represented by the impedance voltage generated by the display panel under the preset driving current) and the target display driving signal in the present application, similar to the storage manner of the second corresponding relationship, the third corresponding relationship can be directly stored in the storage space in the second controller 422, or an independent memory can be configured to store the third corresponding relationship, in this case, the memory can establish a communication connection with the second controller 422, so that the second controller 422 can read the target display driving signal required by the display panel currently connected to the motherboard from the memory, and the specific control circuit connection relationship is not described in detail in the present application.

In still other embodiments proposed in the present application, referring to a hardware structure diagram of yet another optional example of the display device shown in fig. 3, the conversion control unit 410 may include a backlight driver 411 and a voltage reader 412, where the backlight driver 411 may be connected to the first controller 421 and the first connection interface 310, so that the first controller 421, the backlight driver 411 and the backlight module 210 form the first path. And the voltage reader 412 is connected to the first controller 421 so as to transmit the read current impedance voltage of the currently accessed display panel to the first controller 421.

Alternatively, the connection between the first controller 421 and the backlight driver 411 and the voltage reader 412 may be implemented by using a control Bus, which may include, but is not limited to, a System Management Bus (SMbus), and the communication principle of such a Bus of the SMbus is not described in detail in this application.

In practical applications of the present invention, in order to detect whether the main board is connected to the display panel, as shown in fig. 3, a panel connection detection interface connected to the third connection port 330 may be configured in the first controller 421, and a panel identification interface capable of being connected to the third connection port 330 may be configured in the display panel, so that a third path may be formed when the panel connection detection interface and the panel identification interface are respectively connected to the third connection port 330.

It can be understood that, at the moment when the third path is formed, that is, the display panel 200 is connected to the main board 100, and the panel identification interface on the display panel 200 is connected to the third connection port 330, the signal output by the third connection port 330 will change, so that the panel connection detection interface obtains or generates corresponding signal change information, and sequentially determines that the display panel 200 is connected to the main board 100, and then according to the technical concept proposed in this application, the type of the connected display panel 200 can be identified to determine what content of the target control information is transmitted thereto.

It should be noted that, the specific implementation manner for detecting whether the main board is connected to the display panel is not limited to the above-described detection manner for detecting the change of the interface output signal, and may be determined according to the actual situation, and this application is not listed here.

In addition, for the panel connector 300 in each of the above embodiments, as shown in fig. 2, a plurality of connectors may be included, and two components that need to communicate with each other or have a control relationship may be connected to the same connector to implement a path between the two components, but the implementation manner of forming a path between the two components is not limited.

In still other embodiments, the panel connector 300 may also include a plurality of sets of connectors, each set of connectors may include two connectors that are symmetrically disposed and electrically connected, so that two components that need to communicate with each other or have a control relationship may be selected, and one or more sets of connectors may be selected to connect the connectors disposed on one side of each set of connectors, respectively, so as to achieve electrical connection between the two components, and so on. Of course, the panel connector 300 of the present application may also have other connection structures, and all of them belong to the protection scope of the present application as long as the electrical connection between the components on the motherboard and the components on the display panel can be achieved, and the detailed description of the present application is not made here.

Based on the hardware composition and the structural connection relationship of the display device described in the foregoing embodiments, referring to an optional application structural relationship of the display device shown in fig. 4, in this optional example, the first controller 421 may be an EC controller, the second controller 422 may be a Scalar controller, the Memory for storing the third correspondence may be a charged Erasable Programmable Read-Only Memory (EEPROM), and the Scalar controller and the EEPROM may also implement data interaction through an SMbus bus, and a specific communication process is not described in detail.

As shown in fig. 4, the panel connection detection interface in the first controller 421 may be a General-purpose input/output (GPIO) interface, and in practical applications, the GPIO interface may detect a panel identification interface in the display panel 200 to determine whether the motherboard is connected to the display panel, and after determining that the motherboard is connected to the display panel, the EC controller may notify the backlight driver 411 in the LED converter (i.e., the conversion control unit 410, which is described in this application by taking an LED backlight source as an example) to output a preset driving current of the LED to the display panel through the SMbus, so as to drive the backlight of the backlight module 210 to be turned on.

Thereafter, there may be a voltage reader 412 configured in the LED converter to read the current impedance voltage of the display panel according to the basic circuit of the LED converter, etc. It can be understood that the preset driving currents are different, and the current impedance voltage generated by the display panel changes correspondingly at the moment, so that in the display panel control method, the preset driving current can be determined firstly, the impedance voltage generated by inputting the preset driving current into various display panels can be determined by combining the known impedances of various display panels, and the corresponding relation between the preset driving current and the target display driving signal required by the operation of various display panels is established. On the basis, in the process of identifying the display panel which is actually accessed, the driving current which is started to be input is the preset driving current which is used for constructing the corresponding relation, so that the control reliability is ensured.

Based on the above analysis, after the EC controller learns the current impedance voltage of the currently accessed display panel, the EC controller may query the second correspondence stored in advance, determine the target driving current required by the operation of the display panel, and then control the backlight driver to output the target driving current to the backlight module, thereby ensuring that the backlight brightness meets the requirement.

Similarly, after the Scalar controller may obtain the current impedance voltage from the EC controller, or after determining the panel identifier (which has a unique characteristic) of the currently accessed display panel based on the current impedance voltage, the Scalar controller may query the third corresponding relationship stored in the EEPROM to obtain a target display driving signal required by the currently accessed display panel to display a target color, and then the Scalar controller may output the target display driving signal to the display module, so that the display module responds to the target display driving signal to display the target color. The specific color display control principle is not described in detail in this application.

It should be noted that, regarding the connection manner between the display panel and the motherboard, the connection manner is not limited to the connection manner shown in the panel connector structure described in the above embodiment, and the connection between the two components in the display device is usually realized by a panel cable, and the application does not detail the internal composition of the panel cable and the connection configuration process in the use process thereof.

In addition, how the voltage reader 412 reads the current impedance voltage of the accessed display panel is implemented, the present application is not limited, and a control chip having a program instruction for implementing the function may be configured according to the voltage reading requirement provided by the present application.

In summary, for the display device with the above structure provided in the present application, in order to determine the type of the display panel included in the display device, so that the control device of the main board can directly and accurately provide the required target driving signal for the display device, the present application will utilize the characteristics of different types of display panels, firstly input the preset driving current to the connected display panel, and query and obtain the driving signal corresponding to the current impedance voltage, i.e. the target driving signal required by the currently connected display panel to operate, according to the read current impedance voltage of the display panel.

It can be seen that, in the whole implementation process of implementing the identification and control of the display panel, the display panel is identified without depending on the level signal combination generated by the plurality of connectors of the display panel accessing the motherboard (taking three connectors as an example, the output may be 001, 110, 101, etc., and each combination may represent one type of display panel). Therefore, different display panels are connected into the mainboard of the display equipment, the display equipment can be realized by using one cable, the cables corresponding to each type of display panel are not needed to be configured, the level signal combination for identifying the type of display panel is configured, the operation complexity is simplified, the type and the quantity of the display panels which can be supported by the mainboard can not be limited, and in the scene of connecting or replacing the display panels, the display equipment can be directly connected, the design and the deployment of the bottom layer of the mainboard are not needed to be changed by developers, and the service cost and the service complexity are reduced.

In conjunction with the above description about the constituent structure of the display device and the implementation of the functions thereof, the present application will hereinafter describe a display panel control method applicable to the display device of the above structure, but not limited to the display device described in the above embodiments.

Specifically, referring to fig. 5, a flowchart of an optional example of the display panel control method provided by the present application is shown, where the method may be applied to the control device in the display device, and a specific execution main body may be determined in conjunction with the description of the corresponding component function in the foregoing embodiment, which is not described in detail in this embodiment. As shown in fig. 5, the display panel control method provided in this embodiment may include:

step S11, transmitting a preset driving current to the display panel to be identified so as to control the display panel to be identified to enter a preparation state for operation;

in combination with the above description of the technical concept of the present application, in a case that it is determined that the main board is connected to the display panel, the currently connected display panel is marked as the display panel to be identified, and a preset driving current is supplied to the display panel, so that the display panel generates a certain impedance voltage, which is convenient for determining the category of the display panel to be identified.

The preset driving current is usually smaller than a target driving current required by normal operation of each type of display panel, and in order to reduce power consumption and ensure successful start of each type of display panel, a backlight capable of driving each type of display panel may be turned on to generate a minimum power required by a certain impedance voltage. But is not limited to this manner of obtaining the preset driving current, which may be determined as the case may be.

It can be understood that after the preset driving current is transmitted to the display panel to be identified, the backlight brightness is often lower at this time because the preset driving current is smaller than the target driving current required by the normal operation of the display panel, but because the time spent in the display panel identification process is shorter, the low-brightness display time can be ignored, and the display requirement of the current scene on the display panel is not substantially affected.

In practical application, in combination with the above description of the hardware structure, the signal control unit may control the conversion control unit to generate the preset driving current, and transmit the preset driving current to the display panel to be identified.

Step S12, obtaining the current impedance voltage of the display panel to be identified;

after the above analysis, since the backlight is turned on under the driving of the preset driving current, the impedance voltage is generated, and the present impedance voltage of the display panel to be identified can be read by the voltage reader on the main board and then sent to the first controller in the signal control unit to execute the subsequent operation. The specific read implementation of the impedance voltage is not described in detail in this application.

Step S13, determining a target driving signal of the display panel to be identified corresponding to the current impedance voltage;

and step S14, transmitting a target driving signal to the display panel to be recognized so as to control the display panel to be recognized to enter a target state for operation.

In the embodiment of the present application, because the driving signals required by the normal operation of the display panels of different types, such as the driving current and the display driving signals, may have differences, and the impedances of the display panels of different types are different, so that the display panels of different types may have differences in the generated impedance voltages under the condition of inputting the preset driving current. The present application does not limit the manner of representing the first correspondence relationship and the manner of storing the first correspondence relationship.

Based on this, in practical application, after the current impedance voltage generated by the display panel to be identified after the preset driving current is input is obtained, the first corresponding relationship between the predetermined same impedance voltage and the driving signals required by different display panels can be obtained, and the driving signal corresponding to the current impedance voltage is determined as the target driving signal of the display panel to be identified by querying the first corresponding relationship, and the specific query implementation process is not described in detail in the present application.

It can be seen that, in the whole process of determining the target driving signal required by the display panel to be identified, the embodiment of the application only needs to transmit the driving current to the display panel to be identified, and can read the impedance voltage of the display panel to be identified, and does not depend on the identification number of the preset configuration of the cable connecting the display panel to the mainboard to be identified, namely, the level signals generated by the multiple connectors of the cable connecting mainboard are combined, so that various problems caused by the identification mode can be avoided, thereby enabling the same mainboard to support an unlimited number of display panels, and under the scene of display panel access or replacement, the application can directly access the display panel, developers do not need to change the design and deployment of the bottom layer of the mainboard, and the cost and complexity of service are reduced.

Referring to fig. 6, a signaling flow diagram of another optional example of the display panel control method proposed in the present application, where this embodiment may be an optional detailed implementation method of the display panel control method described in the foregoing embodiment, but is not limited to the detailed implementation method described in this embodiment, and as shown in fig. 6, the method may include:

step S21, the first controller obtains the signal change information generated by the panel connection detection interface on the mainboard;

step S22, the first controller determines the panel connection detection interface to be connected with the display panel to be identified according to the signal change information;

step S23, the first controller sends a first driving command to the backlight driver;

step S24, the backlight driver executes the first driving command, and transmits the output preset driving current to the display panel to be identified;

in this application practical application, controlling means on the mainboard needs confirm this mainboard connection earlier and has a display panel, just can regard it as waiting to discern display panel, predetermine drive current to its transport. The implementation of detecting whether the main board is connected to the display panel is not limited to the determination based on the signal change generated by the panel connection detection interface described in the embodiment.

Optionally, the panel connection detection interface may be disposed in the first controller, for example, a GPIO interface in the EC controller, that is, the EC controller may detect a preset connection port on the panel connector through the GPIO interface, for example, the third connection port, to determine whether the motherboard is connected to the display panel.

In combination with the above analysis, in order to implement the driving process, the first controller may send a first driving instruction to a backlight driver, such as a current driving circuit, for generating the driving current, so as to instruct the backlight driver to output a preset driving current, where the content of the first driving instruction and the output mode thereof are not limited in the present application.

Step S25, the voltage reader reads the current impedance voltage of the display panel to be identified;

step S26, the voltage reader sends the current impedance voltage to the first controller;

step S27, the first controller obtains a second corresponding relation between the impedance voltage and the driving current of different display panels;

step S28, the first controller queries the second corresponding relationship, and determines that the driving current of the display panel corresponding to the current impedance voltage is the target driving current;

in conjunction with the description of the corresponding parts of the above embodiments, the first corresponding relationship between the impedance voltage of the different display panels at the input of the preset driving current and the driving signal required by the different display panels generally includes: the display driving circuit comprises a first corresponding relation between impedance voltage and driving current of different display panels under the condition of inputting preset driving current, and a second corresponding relation between impedance voltage and driving current of different display panels under the condition of inputting preset driving current, and a third corresponding relation between impedance voltage and different display driving signals of different display panels under the condition of inputting preset driving current. The impedance voltage in the second corresponding relation is generated under the condition that the corresponding display panel inputs the preset driving current.

Based on this, in practical application, different types of display panels may be predetermined, and in the case that the preset driving current is input, the generated impedance voltage and the target driving current required for normal operation of the display panels of different types may be established, and then, a second corresponding relationship between different display panel types, different impedance voltages under the preset driving current, and different target driving currents may be established, as shown in fig. 7a, the second corresponding relationship may be recorded in a table manner, but is not limited to a representation manner and a storage manner of the corresponding relationship, and may be determined according to circumstances, which is not described in detail herein.

Step S29, the first controller sends the received current impedance voltage to the second controller;

in combination with the structural schematic diagrams of the display device shown in fig. 3 and fig. 4, after the first controller may determine the type of the display panel currently connected to the main board according to the above manner, the first controller may actively or passively notify the second controller so that the second controller may determine the target display driving signal required by the display panel, and the specific notification manner may be determined according to a third corresponding relationship stored in the second controller or a memory connected to the second controller, for example, the first controller may directly notify the second controller of the obtained current impedance voltage, or may notify the second controller of the panel identifier of the display panel corresponding to the current impedance voltage in the second corresponding relationship, and the application does not limit the implementation manner of notifying the type of the display panel connected to the second controller.

Step S210, the second controller obtains a third corresponding relation between the impedance voltages of different display panels and different display driving signals;

step S211, the second controller inquires the third corresponding relation, and determines the display driving signal of the display panel corresponding to the current impedance voltage as the target display driving signal;

in practical applications, the display driving signals required for normal operation of any type of display panel may include Low-Voltage differential signaling (LVDS) signals such as a pixel clock (DCLK), a horizontal synchronization signal (Hysnc), a vertical synchronization signal (Vysnc), and the like, and the display module driving the display panel to output a required color through these display driving signals, but not limited to these display driving signals, and the detailed operation principle of controlling the display color of the display panel is not described in detail in this application.

Based on this, referring to fig. 7b and fig. 7c, the target display driving signal diagrams corresponding to two different types of display panels are shown, the present application may determine in advance, in an experiment or the like, the target display driving signal content required for normal operation of the different types of display panels, where the type of the display panel may be represented by a panel identifier and then is associated with the impedance voltage under the determined preset driving current; of course, the impedance voltage at the preset driving current may also be directly represented, and the application is not limited thereto.

After determining the target display driving signals corresponding to the different types of display panels, when storing the target display driving signals, the stored target display driving signals may be associated with panel identifiers of different display panels or impedance voltages at preset driving currents and then stored, that is, a third corresponding relationship between the impedance voltages at the preset driving currents and the different display driving signals of the different display panels is established, so as to be queried when the target display driving signals of a certain display panel are queried subsequently.

The third correspondence may be an association between storage addresses of different target driving signals and different display panels, but is not limited thereto, and the present application does not limit the expression and storage manner of the third correspondence, and the content of the display driving signal required by one display panel to display a color is not limited to the content of the display driving signal shown in fig. 7b and 7c, which may be determined as the case may be, and is not listed here.

It should be understood that, in combination with the above analysis, in the process of querying the third correspondence relationship, the second controller may specifically receive the current impedance voltage sent by the first controller, or a panel identifier of the display panel corresponding to the current impedance voltage, and then query the third correspondence relationship (for example, a correspondence relationship stored in the EEPROM), determine that the display driving signal corresponding to the current impedance voltage or the panel identifier is the target display driving signal, and the specific implementation process is not described in detail in this application.

Step S212, the first controller sends a second driving instruction to the backlight driver;

step S213, the backlight driver executes the second driving command, and transmits the output target driving current to the display panel to be identified, so as to control the backlight brightness of the display panel to be identified to reach the target brightness;

in step S214, the second controller sends a target display driving signal to the display panel to be recognized to control the display panel to be recognized to display a target color.

It can be understood that after the first controller determines the target driving current of the display panel to be identified and the second controller determines the target display driving signal of the display panel to be identified, the two may be simultaneously transmitted to the display panel, or may be directly transmitted when each is determined, and the application does not limit the specific execution sequence of the above steps.

In summary, in the embodiment of the present application, after determining that the motherboard is connected to the display panel to be identified through signal change of the board connection detection interface on the motherboard, the first controller controls the backlight driver to send a preset driving current to the display panel to be identified, and lights the backlight thereof to generate an impedance voltage, so that the voltage reader can read the current impedance voltage of the display panel to be identified, so that the first controller queries the display panel category corresponding to the current impedance voltage according to the preset driving current, and determines the target driving current required by the display panel to be identified, thereby controlling the backlight driver to transmit the target driving current to the display panel to be identified, and enabling the backlight brightness thereof to reach the target brightness; meanwhile, the first controller can inform the second controller of the current impedance voltage or the type of the display panel corresponding to the current impedance voltage, the second controller inquires a target display driving signal corresponding to the current impedance voltage and transmits the target display driving signal to the display panel to be identified to control the display panel to display the target color, and application requirements are met.

Therefore, in the process of determining the target driving signal required by the display panel to be identified, the method does not depend on the combination of high and low level signals of the display panel connected to the plurality of connectors of the main board, does not need to configure a cable for each type of display panel, simplifies the operation complexity, and does not limit the number of types of display panels supported by the main board, namely the same main board can support display panels of infinite types; under the scene of display panel access or replacement, direct access can be achieved, developers are not required to change the design and deployment of the bottom layer of the main board, and the cost and complexity of service are reduced.

Referring to fig. 8, a schematic structural diagram of an alternative example of the display panel control apparatus proposed in the present application is shown, and the apparatus may be applied to the display device, and may be specifically applied to the control apparatus in the display device. As shown in fig. 8, the display panel control apparatus may include:

the device comprises a preset driving current transmission module 11, a display panel identification module and a control module, wherein the preset driving current transmission module is used for transmitting a preset driving current to the display panel to be identified so as to control the display panel to be identified to enter a preparation state to operate;

the impedance voltage obtaining module 12 is configured to obtain a current impedance voltage of the display panel to be identified;

a target driving signal determining module 13, configured to determine a target driving signal of the display panel to be identified, where the target driving signal corresponds to the current impedance voltage;

and the target driving signal transmission module 14 is configured to transmit the target driving signal to the display panel to be identified, so as to control the display panel to be identified to enter a target state for operation.

In some embodiments, the preset driving current delivery module 11 may be specifically disposed in a first controller in a motherboard, and the preset driving current delivery module 11 may include:

the information acquisition unit is used for acquiring signal change information generated by a panel connection detection interface on the mainboard;

the connection determining unit is used for determining that the panel connection detection interface is connected with the display panel to be identified according to the signal change information;

and the first control unit is used for controlling the backlight driver to output preset driving current and transmitting the preset driving current to the display panel to be identified.

In still other embodiments, the target driving signal determining module 13 may include:

the first corresponding relation obtaining unit is used for obtaining the first corresponding relation between the impedance voltage of different display panels under the condition of inputting the preset driving current and the driving signals required by the different display panels;

and the first query unit is used for querying the first corresponding relation and determining the driving signal corresponding to the current impedance voltage as a target driving signal of the display panel to be identified.

In a possible implementation manner, the first correspondence obtaining unit may include:

a second corresponding relation obtaining unit, configured to obtain a second corresponding relation between impedance voltages and driving currents of different display panels when the preset driving current is input, where the impedance voltages are generated when the preset driving current is input to the corresponding display panel;

and the third corresponding relation acquisition unit is used for acquiring a third corresponding relation between the impedance voltage of different display panels under the condition of inputting the preset driving current and different display driving signals.

Accordingly, the first query unit may include:

a target driving current determining unit in the first controller, configured to query the second correspondence, and determine that the driving current of the display panel corresponding to the current impedance voltage is a target driving current;

a target display driving signal determining unit in the second controller, configured to query the third corresponding relationship, and determine that the display driving signal of the display panel corresponding to the current impedance voltage is a target display driving signal;

in one possible implementation, the target display driving signal determination unit may include:

the first receiving unit is used for receiving the current impedance voltage sent by the first controller or a panel identifier of a display panel corresponding to the current impedance voltage;

and the first determining unit is used for inquiring the third corresponding relation and determining the display driving signal corresponding to the current impedance voltage or the panel identifier as a target display driving signal.

Based on the description of the above embodiment, the above target driving signal delivery module 14 may include:

the first control unit is positioned in the first controller and used for controlling the backlight driver to output the target driving current and transmitting the target driving current to the display panel to be identified so as to control the backlight brightness of the display panel to be identified to reach the target brightness;

and the second control unit is positioned in the second controller and used for sending the target display driving signal to the display panel to be identified so as to control the display panel to be identified to display the target color.

It should be noted that, various modules, units, and the like in the embodiments of the foregoing apparatuses may be stored in the memory as program modules, and the processor executes the program modules stored in the memory to implement corresponding functions, and for the functions implemented by the program modules and their combinations and the achieved technical effects, reference may be made to the description of corresponding parts in the embodiments of the foregoing methods, which is not described in detail in this embodiment.

The present application also provides a storage medium on which a computer program can be stored, and the computer program can be called and loaded by a processor to implement the steps of the display panel control method described in the above embodiments.

Finally, it should be noted that, in the present specification, the embodiments are described in a progressive or parallel manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. The device and the display device disclosed by the embodiment correspond to the method disclosed by the embodiment, so that the description is relatively simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel control method, the method comprising:

acquiring the current impedance voltage of the display panel to be identified;

2. The method of claim 1, wherein the delivering a preset drive current to the display panel to be identified comprises:

3. The method of claim 1 or 2, the determining a target driving signal of the display panel to be identified corresponding to the current impedance voltage, comprising:

4. The method of claim 3, wherein the first correspondence between the impedance voltage of the different display panel when the preset driving current is input and the driving signal required by the different display panel comprises:

5. The method according to claim 4, wherein the querying the first corresponding relationship and determining the driving signal corresponding to the current impedance voltage as the target driving signal of the display panel to be identified comprises:

6. The method of claim 5, wherein the second controller queries the third correspondence to determine that the display driving signal of the display panel corresponding to the current impedance voltage is a target display driving signal, and comprises:

7. A display panel control apparatus, the apparatus comprising:

8. A display device, the display device comprising:

a main board; a display panel;

9. The display device of claim 8, the display panel comprising: backlight unit and display module assembly:

10. The display device of claim 9, the transition control unit comprising a backlight driver and a voltage reader, wherein:

the voltage reader is used for being connected with the first controller;