CN110545392A

CN110545392A - Circuit board, preparation method thereof and display device

Info

Publication number: CN110545392A
Application number: CN201910796871.1A
Authority: CN
Inventors: 徐鹏; 金飞; 杨龙
Original assignee: Qingdao Hisense Electronics Co Ltd
Current assignee: Qingdao Hisense Electronics Co Ltd
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2019-12-06
Anticipated expiration: 2039-08-27
Also published as: WO2021036207A1; CN110545392B

Abstract

The invention discloses a circuit board, a preparation method thereof and a display device, wherein a coupling component is arranged between a selection control end of a main control chip and an output control end of an HDMI switch chip according to the relation between a plurality of preset selection signals pre-stored in the main control chip and a target selection signal of the HDMI switch chip, so that the selection signal output by the selection control end of the main control chip is converted by the coupling component and then provided to the output control end of the HDMI switch chip, and the adaptability of the formed circuit board can be improved.

Description

Circuit board, preparation method thereof and display device

Technical Field

The invention relates to the technical field of electronics, in particular to a circuit board, a preparation method thereof and a display device.

background

the display device is generally provided with a plurality of HDMI (High Definition Multimedia Interface) input interfaces. When the HDMI input interface of the main control chip can not meet the product requirement, the HDMI switch chip is required to be arranged to expand the number of the HDMI input interfaces. In practical application, the main control chip pre-stores a preset relationship between the preset selection signal and the interface definition of the HDMI switch chip. Thus, the master control chip inputs selection signals to the pin PORT _ SEL [1] and the pin PORT _ SEL [0] of the HDMI chip so as to control the HDMI chip to output signals input into the corresponding HDMI input interface to the master control chip. However, the HDMI chips have different types and different selection signals corresponding to the HDMI input interfaces, so that after the selection signals corresponding to the HDMI input interfaces in the HDMI switch chip are changed, flexible conversion of the HDMI input interfaces cannot be realized, thereby resulting in large limitations.

disclosure of Invention

the embodiment of the invention provides a circuit board, a preparation method thereof and a display device, which are used for solving the problem of large limitation caused by the fact that flexible conversion of an HDMI input interface cannot be realized in the prior art.

an embodiment of the present invention provides a display device, including: a circuit board;

the circuit board includes: the HDMI switch comprises an HDMI switch chip, a main control chip and a coupling component;

The master control chip is pre-stored with the relationship between a plurality of preset selection signals and the interface definition of the HDMI switch chip;

The HDMI switch chip is pre-stored with the relationship between a plurality of target selection signals and interface definitions;

The coupling component is used for electrically connecting the selection control end of the main control chip and the output control end of the HDMI switch chip according to the relationship between a plurality of preset selection signals pre-stored in the main control chip and the target selection signal of the HDMI switch chip.

Optionally, in an embodiment of the present invention, the plurality of target selection signals include: a first target selection signal, a second target selection signal, and a third target selection signal; the first target selection signal corresponds to a first interface definition, the second target selection signal corresponds to a second interface definition, and the third target selection signal corresponds to a third interface definition;

the plurality of preset selection signals include: a first preset selection signal, a second preset selection signal and a third preset selection signal; the first preset selection signal corresponds to the first interface definition, the second preset selection signal corresponds to the second interface definition, and the third preset selection signal corresponds to the third interface definition.

Optionally, in an embodiment of the present invention, a level of the first target selection signal is the same as a level of the first preset selection signal, a level of the second target selection signal is the same as a level of the second preset selection signal, and a level of the third target selection signal is the same as a level of the third preset selection signal;

the output control terminal includes: a first output control terminal and a second output control terminal; the selection control terminal comprises: a first selection control terminal and a second selection control terminal;

the coupling member includes: a first coupling line and a second coupling line; the first selection control terminal is electrically connected with the first output control terminal through the first coupling line, and the second selection control terminal is electrically connected with the second output control terminal through the second coupling line.

Optionally, in an embodiment of the present invention, a level of the first target selection signal is the same as a level of the second preset selection signal, a level of the second target selection signal is the same as a level of the first preset selection signal, and a level of the third target selection signal is the same as a level of the third preset selection signal;

the coupling member includes: the first switch is connected with the first coupling line;

The first selection control end is electrically connected with the first output control end through the third coupling line;

the anode of the first diode is electrically connected with the first selection control end, and the cathode of the first diode is electrically connected with the first end of the first resistor;

the anode of the second diode is electrically connected with the second selection control end, and the cathode of the second diode is electrically connected with the first end of the first resistor;

The second end of the first resistor is electrically connected with the control end of the first switch;

the first end of the second resistor is electrically connected with a ground terminal, and the second end of the second resistor is electrically connected with the first end of the first resistor;

A first end of the first switch is electrically connected with the ground terminal, and a second end of the first switch is respectively electrically connected with a first end of the third resistor and the second output control terminal;

And the second end of the third resistor is electrically connected with the high-voltage signal end.

Optionally, in an embodiment of the present invention, a level of the first target selection signal is the same as a level of the first preset selection signal, a level of the second target selection signal is the same as a level of the third preset selection signal, and a level of the third target selection signal is the same as a level of the second preset selection signal;

The coupling member includes: a fourth coupling line and a fifth coupling line; the first selection control terminal is electrically connected with the second output control terminal through the fourth coupling line, and the second selection control terminal is electrically connected with the first output control terminal through the fifth coupling line.

Optionally, in an embodiment of the present invention, a level of the first target selection signal is the same as a level of the third preset selection signal, a level of the second target selection signal is the same as a level of the first preset selection signal, and a level of the third target selection signal is the same as a level of the second preset selection signal;

The coupling member includes: a sixth coupling line, a third diode, a fourth resistor, a fifth resistor, a sixth resistor and a second switch;

The first selection control end is electrically connected with the second output control end through the sixth coupling line; the anode of the third diode is electrically connected with the first selection control end, and the cathode of the third diode is electrically connected with the first end of the fourth resistor;

The anode of the fourth diode is electrically connected with the second selection control end, and the cathode of the fourth diode is electrically connected with the first end of the fourth resistor;

a second end of the fourth resistor is electrically connected with a control end of the second switch;

a first end of the fifth resistor is electrically connected with a ground terminal, and a second end of the fifth resistor is electrically connected with a first end of the fourth resistor;

A first end of the second switch is electrically connected with the ground terminal, and a second end of the second switch is respectively electrically connected with a first end of the sixth resistor and the first output control terminal;

and the second end of the sixth resistor is electrically connected with the high-voltage signal end.

Optionally, in an embodiment of the present invention, a level of the first target selection signal is the same as a level of the third preset selection signal, a level of the second target selection signal is the same as a level of the second preset selection signal, and a level of the third target selection signal is the same as a level of the first preset selection signal;

the coupling member includes: a seventh coupling line, a fifth diode, a sixth diode, a seventh resistor, an eighth resistor, a ninth resistor, and a third switch;

the second selection control end is electrically connected with the second output control end through the seventh coupling line;

The anode of the fifth diode is electrically connected with the first selection control end, and the cathode of the fifth diode is electrically connected with the first end of the seventh resistor;

the anode of the sixth diode is electrically connected with the second selection control end, and the cathode of the sixth diode is electrically connected with the first end of the seventh resistor;

A second end of the seventh resistor is electrically connected with a control end of the third switch;

a first end of the eighth resistor is electrically connected with a ground terminal, and a second end of the eighth resistor is electrically connected with a first end of the seventh resistor;

a first end of the third switch is electrically connected with the ground terminal, and a second end of the third switch is electrically connected with a first end of the ninth resistor and the first output control terminal respectively;

And the second end of the ninth resistor is electrically connected with the high-voltage signal end.

optionally, in an embodiment of the present invention, a level of the first target selection signal is the same as a level of the second preset selection signal, a level of the second target selection signal is the same as a level of the third preset selection signal, and a level of the third target selection signal is the same as a level of the first preset selection signal;

the coupling member includes: the fourth coupling line, the seventh diode, the eighth diode, the tenth resistor, the eleventh resistor, the twelfth resistor and the fourth switch;

the second selection control end is electrically connected with the first output control end through the eighth coupling line;

The anode of the seventh diode is electrically connected with the first selection control end, and the cathode of the seventh diode is electrically connected with the first end of the tenth resistor;

the anode of the eighth diode is electrically connected with the second selection control end, and the cathode of the eighth diode is electrically connected with the first end of the tenth resistor;

a second end of the tenth resistor is electrically connected with a control end of the fourth switch;

A first end of the eleventh resistor is electrically connected with a ground terminal, and a second end of the eleventh resistor is electrically connected with a first end of the tenth resistor;

a first end of the fourth switch is electrically connected with the ground terminal, and a second end of the fourth switch is respectively electrically connected with a first end of the twelfth resistor and the second output control terminal;

And the second end of the twelfth resistor is electrically connected with the high-voltage signal end.

the embodiment of the invention also provides a preparation method of the circuit board, and the circuit board comprises the following steps: the HDMI switch chip and the master control chip are connected;

determining the relationship between a plurality of preset selection signals pre-stored in the main control chip and the interface definition of the HDMI switch chip and the relationship between a plurality of target selection signals pre-stored in the HDMI switch chip and the interface definition; wherein one of the interface definitions corresponds to one of the preset selection signals and one of the target selection signals;

And according to the relationship between a plurality of preset selection signals prestored in the main control chip and the target selection signal of the HDMI switch chip, electrically connecting a coupling part between the selection control end of the main control chip and the output control end of the HDMI switch chip.

the embodiment of the invention also provides a circuit board prepared by the preparation method, and the circuit board comprises: the HDMI switch comprises an HDMI switch chip, a main control chip and a coupling component;

The invention has the following beneficial effects:

according to the circuit board, the preparation method thereof and the display device provided by the embodiment of the invention, the coupling component can be arranged between the selection control end of the main control chip and the output control end of the HDMI switch chip according to the relationship between a plurality of preset selection signals pre-stored in the main control chip and the target selection signal of the HDMI switch chip, so that the selection signal output by the selection control end of the main control chip is converted by the coupling component and then provided to the output control end of the HDMI switch chip, and the adaptability of the formed circuit board can be improved.

Drawings

Fig. 1 is a schematic structural view of a circuit board in the related art;

Fig. 2 is a flowchart of a method for manufacturing a circuit board according to an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of a circuit board according to an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of another circuit board according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of another circuit board according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of another circuit board according to an embodiment of the present invention;

Fig. 7 is a schematic structural diagram of another circuit board according to an embodiment of the present invention;

Fig. 8 is a schematic structural diagram of another circuit board according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.

unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

It should be noted that the sizes and shapes of the figures in the drawings are not to be considered true scale, but are merely intended to schematically illustrate the present invention. And the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

A plurality of HDMI (High Definition Multimedia Interface) input interfaces are generally provided in a circuit board of the display device. Fig. 1 is a schematic structural diagram of a circuit board. As shown in connection with fig. 1, the circuit board may include: an HDMI switch chip 10 and a main control chip 20. In the HDMI switch chip 10, along the clockwise direction, 1 of the HDMI output interface 01, the HDMI input interface 02, the HDMI input interface 03, the HDMI input interface 04, and the external signal (e.g. DVD signal) is input from the HDMI input interface 02, the HDMI input interface 03, and the HDMI input interface 04, and the main control chip 20 inputs the selection signal to the pins PORT _ SEL [0] and PORT _ SEL [1] of the HDMI switch chip 10, and controls the levels of the pins PORT _ SEL [0] and PORT _ SEL [1] to control the HDMI switch chip 10 to select which signal of the HDMI input interface is output from the output interface 01. For example, when the pins SEL [1] and SEL [0] of the main control chip 20 output the selection signal, and PORT _ SEL [1] is made to be 0 (herein, 0 represents a low level, 1 represents a high level, which is not indicated below) and PORT _ SEL [0] is made to be 0, the HDMI switch chip 10 may select the signal of the HDMI input interface 02 to be output from the output interface 01 for transmission to the main control chip 20. When PORT _ SEL [1] is set to 0 and PORT _ SEL [0] is set to 1, the HDMI switch chip 10 may select the signal of the HDMI input interface 03 to be output from the output interface 01 for transmission into the main control chip 20. When PORT _ SEL [1] is set to 1 and PORT _ SEL [0] is set to 0, the HDMI switch chip 10 may select the signal of the HDMI input interface 04 to be output from the output interface 01 for transmission into the master chip 20.

since the HDMI signal is a high-speed signal and is easily interfered by other signals to affect transmission accuracy, signal lines cannot be crossed and via cross layers cannot be punched when designing a circuit board. However, the Layout (Layout) of the circuit board in different display devices is different, which results in that the HDMI input interface of the HDMI switch chip on the circuit board does not correspond to the levels of the input pins PORT _ SEL [0] and PORT _ SEL [1] of the main control chip. In order to make the HDMI input interface of the HDMI switch chip in different display devices correspond to the HDMI input interface to be selected by the main control chip, the selection signal pre-stored in the main control chip can be adjusted by setting the software stored in the main control chip, so as to adjust the levels of the input pins PORT _ SEL [0] and PORT _ SEL [1 ]. However, the intelligence of the display device is higher and higher, so that the software architecture in the main control chip is more and more complex, and the iteration requirement is intensive. And after the user purchases the display device, the software version is upgraded in an Over the Air Technology (space download Technology) manner so as to continuously optimize the performance and experience. Moreover, the software versions of different model display devices are also many. Therefore, if the software adjustment is performed, the maintenance workload is large, and the instability of the system is increased. For the problem, when the circuit board is designed, a solution can be considered from the aspect of hardware so as to reduce the design difficulty of the circuit board and improve the adaptability of the prepared circuit board.

In view of this, embodiments of the present invention provide a method for manufacturing a circuit board, which can manufacture circuit board structures used in different display devices without changing software and without changing structures of an HDMI switch chip and a main control chip.

the embodiment of the invention provides a preparation method of a circuit board, which comprises the following steps as shown in fig. 2:

s201, determining the relationship between a plurality of preset selection signals pre-stored in a main control chip and an interface definition of an HDMI switch chip and the relationship between a plurality of target selection signals pre-stored in the HDMI switch chip and the interface definition; wherein, one interface definition corresponds to one preset selection signal and one target selection signal;

s202, according to the relation between a plurality of preset selection signals pre-stored in the main control chip and the target selection signal of the HDMI switch chip, the coupling component is electrically connected between the selection control end of the main control chip and the output control end of the HDMI switch chip.

according to the preparation method of the circuit board provided by the embodiment of the invention, the coupling component is arranged between the selection control end of the main control chip and the output control end of the HDMI switch chip according to the relationship between a plurality of preset selection signals pre-stored in the main control chip and the target selection signal of the HDMI switch chip, so that the selection signal output by the selection control end of the main control chip is converted by the coupling component and then provided to the output control end of the HDMI switch chip, and the adaptability of the formed circuit board can be improved.

in particular implementation, in the embodiment of the present invention, the Circuit Board may be a Printed Circuit Board (PCB). For example, other circuits except the HDMI switch chip and the main control chip may be further disposed on the printed circuit board, and these circuits may be substantially the same as the existing structure, and are not described herein again.

in specific implementation, in the embodiment of the present invention, as shown in fig. 3, the circuit board may include: an HDMI switch chip 100 and a main control chip 200. The HDMI switch chip 100 has a plurality of HDMI input interfaces. Illustratively, the HDMI switch chip 100 may have 3 HDMI input interfaces, such as a first HDMI input interface 110, a second HDMI input interface 120, and a third HDMI input interface 130. Of course, the HDMI switch chip 100 may have 4, 5, 6 or more HDMI input interfaces, which may be designed according to the actual application environment, and is not limited herein.

In specific implementation, in the embodiment of the present invention, as shown in fig. 3, the output control terminal of the HDMI switch chip 100 may include: a first output control terminal PS1 and a second output control terminal PS 2. Illustratively, the first output control terminal PS1 may be the above-mentioned pin PORT _ SEL [1], and the second output control terminal PS2 may be the above-mentioned pin PORT _ SEL [0 ]. It should be noted that the structure and the working principle of the HDMI switch chip may be substantially the same as those in the prior art, and are not described herein again.

in specific implementation, in the embodiment of the present invention, the interface definition of the HDMI switch chip may include: a first interface definition, a second interface definition, and a third interface definition. Specifically, in the HDMI switch chip, the first target selection signal corresponds to the first interface definition, so that when the first target selection signal is input at the pins PORT _ SEL [1] and PORT _ SEL [0], the HDMI switch chip provides the signal input at the first HDMI input interface 110 to the master signal 200. For example, the first target selection signal may include: a first sub-target selection signal having a first level (e.g., a low level or a high level) and a second sub-target selection signal having the first level. For example, the first sub-target selection signal of a low level is input to the pin PORT _ SEL [1] so that the level of the pin PORT _ SEL [1] is a low level. The second sub-target selection signal of the low level is output through the pin PORT _ SEL [0] so that the level of the pin PORT _ SEL [0] is the low level.

The second target selection signal corresponds to the second interface definition, such that when the second target selection signal is inputted to the pins PORT _ SEL [1] and PORT _ SEL [0], the HDMI switch chip provides the signal inputted to the second HDMI input interface 120 to the main control signal 200. For example, the second target selection signal may include: a third sub-target selection signal having a first level (e.g., a low level or a high level) and a fourth sub-target selection signal having a second level (e.g., a high level or a low level). For example, the third sub-target of the low level selects the signal input pin PORT _ SEL [1] so that the level of the pin PORT _ SEL [1] is the low level. The fourth sub-target selection signal of the high level is output through the pin PORT _ SEL [0] so that the level of the pin PORT _ SEL [0] is the high level.

the third target selection signal corresponds to the third interface definition, such that when the third target selection signal is input to the pins PORT _ SEL [1] and PORT _ SEL [0], the HDMI switch chip provides the signal input to the third HDMI input interface 130 to the main control signal 200. For example, the third target selection signal may include: a fifth sub-target selection signal having a second level (e.g., a high level or a low level) and a sixth sub-target selection signal having a first level (e.g., a low level or a high level). For example, the fifth sub-target selection signal of high level is input to the pin PORT _ SEL [1] so that the level of the pin PORT _ SEL [1] is high level. The sixth sub-target selection signal of the low level is output through the pin PORT _ SEL [0] so that the level of the pin PORT _ SEL [0] is the low level.

in specific implementation, in the embodiment of the present invention, as shown in fig. 3, the selecting the control end may include: a first selection control terminal SEL1 and a second selection control terminal SEL 2. Illustratively, the first selection control terminal SEL1 may be the pin SEL [1] of the main control chip 200, and the second selection control terminal SEL2 may be the pin SEL [0] of the main control chip 200. It should be noted that the structure and the working principle of the main control chip may be basically the same as those in the prior art, and are not described herein again. In specific implementation, in the embodiment of the present invention, the main control chip 200 stores a plurality of preset selection signals and a plurality of interface definitions in advance. Illustratively, the plurality of preset selection signals may include: a first preset selection signal, a second preset selection signal and a third preset selection signal. Specifically, in the main chip, the first preset selection signal corresponds to the first interface definition. For example, the first preset selection signal may include: a first sub preset selection signal having a first level (e.g., a low level) and a second sub preset selection signal having the first level. For example, the first sub preset selection signal of the low level is output through the pin SEL [1] so that the level of the pin SEL [1] is the low level. The second sub preset selection signal of low level is outputted through the pin SEL [0] so that the level of the pin SEL [0] is low level.

Wherein the second preset selection signal corresponds to the second interface definition. For example, the second preset selection signal may include: a third sub preset selection signal having a first level (e.g., a low level) and a fourth sub preset selection signal having a second level (e.g., a high level). For example, the third sub preset selection signal of the low level is output through the pin SEL [1] so that the level of the pin SEL [1] is the low level. The fourth sub preset selection signal of high level is output through the pin SEL [0] so that the level of the pin SEL [0] is high level.

wherein the third preset selection signal corresponds to the third interface definition. For example, the third preset selection signal may include: a fifth sub preset selection signal having a second level (e.g., a high level) and a sixth sub preset selection signal having a first level (e.g., a low level). Wherein, the fifth sub preset selection signal of high level is output through the pin SEL [1] to make the level of the pin SEL [1] be high level. The sixth sub preset selection signal of the low level is output through the pin PORT _ SEL [0] so that the level of the pin SEL [0] is the low level.

the present invention will be described in detail with reference to specific examples. It should be noted that the following examples are for better explaining the present invention, but not limiting the present invention.

The first embodiment,

in specific implementation, the relationship between the preset selection signals pre-stored in the main control chip and the target selection signal of the HDMI switch chip may be as follows: the level of the first target selection signal is the same as the level of the first preset selection signal, the level of the second target selection signal is the same as the level of the second preset selection signal, and the level of the third target selection signal is the same as the level of the third preset selection signal. In an embodiment of the present invention, as shown in fig. 3, the coupling member 300 may include: a first coupling line S1 and a second coupling line S2; the first selection control terminal SEL1 is electrically connected to the first output control terminal PS1 through a first coupling line S1, and the second selection control terminal SEL2 is electrically connected to the second output control terminal PS2 through a second coupling line S2.

specifically, referring to table 1, the level of the first target selection signal is the same as the level of the first preset selection signal, which refers to: the level a1 of the first sub-target selection signal is the same as the level B1 of the first sub-preset selection signal, and the level a2 of the second sub-target selection signal is the same as the level B2 of the second sub-preset selection signal. The level of the second target selection signal is the same as the level of the second preset selection signal, which means that: the level A3 of the third sub-target selection signal is the same as the level B3 of the third sub-preset selection signal, and the level a4 of the fourth sub-target selection signal is the same as the level B4 of the fourth sub-preset selection signal. The level of the third target selection signal is the same as the level of the third preset selection signal, which means that: the level a5 of the fifth sub-target selection signal is the same as the level B5 of the fifth sub-preset selection signal, and the level a6 of the sixth sub-target selection signal is the same as the level B6 of the sixth sub-preset selection signal. Wherein "O" represents the same and "-" represents the same, regardless, and the following meanings are not specified.

Level of electricity

A1

A2

A3

A4

A5

A6

B1

O

—

B2

—

O

—

B3

—

O

—

B4

—

O

—

B5

—

O

—

B6

—

O

TABLE 1

Specifically, the main control chip 200 outputs a first sub-preset selection signal having a low level through the first selection control terminal SEL1, and the first sub-preset selection signal is input to the first output control terminal PS1 through the first coupling line S1, so that the first output control terminal PS1 is at a low level (i.e., 0). The main control chip 200 outputs a second sub-preset selection signal having a low level through the second selection control terminal SEL2, and the second sub-preset selection signal is input to the second output control terminal PS2 through the second coupling line S2, so that the second output control terminal PS2 is at a low level. This enables the HDMI chip 200 to output the signal of the first HDMI input interface 110 defined by the corresponding first interface to the main control chip 200.

the main control chip 200 outputs a third sub-preset selection signal having a low level through the first selection control terminal SEL1, and the third sub-preset selection signal is input to the first output control terminal PS1 through the first coupling line S1, so that the first output control terminal PS1 is at a low level. The main control chip 200 outputs a fourth sub-preset selection signal having a high level through the second selection control terminal SEL2, and the fourth sub-preset selection signal is input to the second output control terminal PS2 through the second coupling line S2, so that the second output control terminal PS2 is at a high level (i.e., 1). This enables the HDMI chip 200 to output the signal of the second HDMI input interface 120 defined by the second interface to the main control chip 200.

the main control chip 200 outputs a fifth sub-preset selection signal having a high level through the first selection control terminal SEL1, and the fifth sub-preset selection signal is input to the first output control terminal PS1 through the first coupling line S1, so that the first output control terminal PS1 is at a high level. The main control chip 200 outputs a sixth sub-preset selection signal having a low level through the second selection control terminal SEL2, and the sixth sub-preset selection signal is input to the second output control terminal PS2 through the second coupling line S2, so that the second output control terminal PS2 is at a low level. This enables the HDMI chip 200 to output a signal of the third HDMI input interface 130 defined corresponding to the third interface to the main control chip 200.

Example II,

in specific implementation, in the embodiment of the present invention, the relationship between the preset selection signals pre-stored in the main control chip and the target selection signal of the HDMI switch chip may be as follows: the level of the first target selection signal is the same as the level of the second preset selection signal, the level of the second target selection signal is the same as the level of the first preset selection signal, and the level of the third target selection signal is the same as the level of the third preset selection signal. Thus, the target selection signal and the preset selection signal defined corresponding to the second interface are different, and the target selection signal and the preset selection signal defined corresponding to the third interface are also different. Therefore, the coupling component can be designed, so that the preset selection signal can be converted through the coupling component, the converted target selection signal can control the HDMI switch chip to select the HDMI input interface defined by the corresponding interface, and the signal input into the HDMI input interface can be accurately output to the main control chip.

Specifically, referring to table 2, the level of the first target selection signal is the same as the level of the second preset selection signal, which refers to: the level a1 of the first sub-target selection signal is the same as the level B3 of the third sub-preset selection signal, and the level a2 of the second sub-target selection signal is the same as the level B4 of the fourth sub-preset selection signal. The level of the second target selection signal is the same as the level of the first preset selection signal, which means that: the level A3 of the third sub-target selection signal is the same as the level B1 of the first sub-preset selection signal, and the level a4 of the fourth sub-target selection signal is the same as the level B2 of the second sub-preset selection signal. The level of the third target selection signal is the same as the level of the third preset selection signal, which means that: the level a5 of the fifth sub-target selection signal is the same as the level B5 of the fifth sub-preset selection signal, and the level a6 of the sixth sub-target selection signal is the same as the level B6 of the sixth sub-preset selection signal.

level of electricity

A1

A2

A3

A4

A5

A6

B1

—

O

—

B2

—

O

—

B3

O

—

B4

—

O

—

B5

—

O

—

B6

—

O

TABLE 2

In particular implementation, in an embodiment of the present invention, as shown in fig. 4, the coupling component 300 may include: a third coupling line S3, a first diode VD1, a second diode VD2, a first resistor R1, a second resistor R2, a third resistor R3, and a first switch M1;

The first selection control terminal SEL1 is electrically connected to the first output control terminal PS1 through a third coupling line S3;

the anode of the first diode VD1 is electrically connected with a first selection control end SEL1, and the cathode of the first diode VD1 is electrically connected with the first end of the first resistor R1;

the anode of the second diode VD2 is electrically connected to the second selection control terminal SEL2, and the cathode of the second diode VD2 is electrically connected to the first terminal of the first resistor R1;

a second end of the first resistor R1 is electrically connected with a control end of the first switch M1;

a first end of the second resistor R2 is electrically connected to the ground GND, and a second end of the second resistor R2 is electrically connected to a first end of the first resistor R1;

a first end of the first switch M1 is electrically connected to the ground GND, and a second end of the first switch M1 is electrically connected to a first end of the third resistor R3 and the second output control terminal PS2, respectively;

a second terminal of the third resistor R3 is electrically connected to the high voltage signal terminal VDD.

In practical implementation, in the embodiment of the present invention, the first switch M1 may be a transistor or a Metal Oxide Semiconductor field effect transistor (MOS), which is not limited herein.

In specific implementation, in the embodiment of the invention, the structures of the first diode VD1 and the second diode VD2 may be substantially the same as those of the diodes in the prior art, and are not described herein again.

In practical implementation, in the embodiment of the present invention, the resistance of the first resistor R1 may be 4.7k Ω, the resistance of the second resistor R2 may be 47k Ω, and the resistance of the third resistor R3 may be 4.7k Ω. Of course, the resistance value of the first resistor R1, the resistance value of the second resistor R2, and the resistance value of the third resistor R3 may be designed according to the practical application environment, and are not limited herein.

Specifically, the main control chip 200 outputs the first sub-preset selection signal having a low level through the first selection control terminal SEL1, and then the level of the first selection control terminal SEL1 is a low level, so that the level of the first output control terminal PS1 is a low level. The second sub preset selection signal having a low level is output through the second selection control terminal SEL2, and the level of the second selection control terminal SEL2 is a low level. The first diode VD1 and the second diode VD2 are disconnected from each other, and the first switch M1 is controlled to be turned off, so that the level of the second output control terminal PS2 is at a high level. This enables the HDMI chip 200 to output the signal of the first HDMI input interface 110 defined by the corresponding first interface to the main control chip 200.

the main control chip 200 outputs the third sub-preset selection signal having a low level through the first selection control terminal SEL1, and then the level of the first selection control terminal SEL1 is a low level, so that the level of the first output control terminal PS1 is a low level. The fourth sub preset selection signal having a high level is output through the second selection control terminal SEL2, and the level of the second selection control terminal SEL2 is a high level. When the two ends of the first diode VD1 are disconnected and the second diode VD2 is turned on, the first switch M1 is controlled to be turned on, so that the level of the second output control terminal PS2 is low. This enables the HDMI chip 200 to output the signal of the second HDMI input interface 120 defined by the second interface to the main control chip 200.

The main control chip 200 outputs the fifth sub-preset selection signal having a high level through the first selection control terminal SEL1, and the level of the first selection control terminal SEL1 is a high level, so that the level of the first output control terminal PS1 is a high level. The sixth sub preset selection signal having a low level is output through the second selection control terminal SEL2, and the level of the second selection control terminal SEL2 is a low level. When the first diode VD1 is turned on and both ends of the second diode VD2 are turned off, the first switch M1 is controlled to be turned on, so that the level of the second output control terminal PS2 is low. This enables the HDMI chip 200 to output a signal of the third HDMI input interface 130 defined corresponding to the third interface to the main control chip 200.

example III,

In specific implementation, in the embodiment of the present invention, the relationship between the preset selection signals pre-stored in the main control chip and the target selection signal of the HDMI switch chip may be as follows: the level of the first target selection signal is the same as the level of the first preset selection signal, the level of the second target selection signal is the same as the level of the third preset selection signal, and the level of the third target selection signal is the same as the level of the second preset selection signal. Therefore, the coupling component can be designed, so that the preset selection signal can be converted through the coupling component, the converted target selection signal can control the HDMI switch chip to select the HDMI input interface defined by the corresponding interface, and the signal input into the HDMI input interface can be accurately output to the main control chip.

specifically, referring to table 3, the level of the first target selection signal is the same as the level of the first preset selection signal, which indicates that: the level a1 of the first sub-target selection signal is the same as the level B1 of the first sub-preset selection signal, and the level a2 of the second sub-target selection signal is the same as the level B2 of the second sub-preset selection signal. The level of the second target selection signal is the same as the level of the third preset selection signal, which means that: the level A3 of the third sub-target selection signal is the same as the level B5 of the fifth sub-preset selection signal, and the level a4 of the fourth sub-target selection signal is the same as the level B6 of the sixth sub-preset selection signal. The level of the third target selection signal is the same as the level of the second preset selection signal, which means that: the level a5 of the fifth sub-target selection signal is the same as the level B3 of the third sub-preset selection signal, and the level a6 of the sixth sub-target selection signal is the same as the level B4 of the fourth sub-preset selection signal.

level of electricity

A1

A2

A3

A4

A5

A6

B1

O

—

B2

—

O

—

B3

—

O

—

B4

—

O

B5

—

O

—

B6

—

O

—

TABLE 3

In particular implementation, in an embodiment of the present invention, as shown in fig. 5, the coupling component 300 may include: a fourth coupling line S4 and a fifth coupling line S5; the first selection control terminal SEL1 is electrically connected to the second output control terminal PS2 through a fourth coupling line S4, and the second selection control terminal SEL2 is electrically connected to the first output control terminal PS1 through a fifth coupling line S5.

specifically, the main control chip 200 outputs the first sub-preset selection signal having a low level through the first selection control terminal SEL1, and then the level of the first selection control terminal SEL1 is a low level, so that the level of the second output control terminal PS2 is a low level. The second sub-preset selection signal having a low level is output through the second selection control terminal SEL2, and the level of the second selection control terminal SEL2 is a low level, so that the level of the first output control terminal PS1 is a low level. This enables the HDMI chip 200 to output the signal of the first HDMI input interface 110 defined by the corresponding first interface to the main control chip 200.

the main control chip 200 outputs the third sub-preset selection signal having a low level through the first selection control terminal SEL1, and then the level of the first selection control terminal SEL1 is a low level, so that the level of the second output control terminal PS2 is a low level. When the fourth sub preset selection signal having a high level is output through the second selection control terminal SEL2, the level of the second selection control terminal SEL2 is a high level, so that the level of the first output control terminal PS1 is a high level. This enables the HDMI chip 200 to output the signal of the second HDMI input interface 120 defined by the second interface to the main control chip 200.

the main control chip 200 outputs the fifth sub-preset selection signal having a high level through the first selection control terminal SEL1, and the level of the first selection control terminal SEL1 is a high level, so that the level of the second output control terminal PS2 is a high level. When the sixth sub preset selection signal having a low level is output through the second selection control terminal SEL2, the level of the second selection control terminal SEL2 is a low level, so that the level of the first output control terminal PS1 is a low level. This enables the HDMI chip 200 to output a signal corresponding to the third HDMI input interface 120 defined by the third interface to the main control chip 200.

example four,

In specific implementation, in the embodiment of the present invention, the relationship between the preset selection signals pre-stored in the main control chip and the target selection signal of the HDMI switch chip may be as follows: the level of the first target selection signal is the same as the level of the third preset selection signal, the level of the second target selection signal is the same as the level of the first preset selection signal, and the level of the third target selection signal is the same as the level of the second preset selection signal. Therefore, the coupling component can be designed, so that the preset selection signal can be converted through the coupling component, the converted target selection signal can control the HDMI switch chip to select the HDMI input interface defined by the corresponding interface, and the signal input into the HDMI input interface can be accurately output to the main control chip.

specifically, the level of the first target selection signal is the same as the level of the third preset selection signal, which means that: the level a1 of the first sub-target selection signal is the same as the level B5 of the fifth sub-preset selection signal, and the level a2 of the second sub-target selection signal is the same as the level B6 of the sixth sub-preset selection signal. The level of the second target selection signal is the same as the level of the first preset selection signal, which means that: the level A3 of the third sub-target selection signal is the same as the level B1 of the first sub-preset selection signal, and the level a4 of the fourth sub-target selection signal is the same as the level B2 of the second sub-preset selection signal. The level of the third target selection signal is the same as the level of the second preset selection signal, which means that: the level a5 of the fifth sub-target selection signal is the same as the level B3 of the third sub-preset selection signal, and the level a6 of the sixth sub-target selection signal is the same as the level B4 of the fourth sub-preset selection signal.

Level of electricity

A1

A2

A3

A4

A5

A6

B1

—

O

—

B2

—

O

—

B3

—

O

—

B4

—

O

B5

O

—

B6

—

O

—

TABLE 4

in particular implementation, in an embodiment of the present invention, as shown in fig. 6, the coupling component 300 may include: a sixth coupling line S6, a third diode VD3, a fourth diode VD4, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a second switch M2;

The first selection control terminal SEL1 is electrically connected to the second output control terminal PS2 through a sixth coupling line S6;

The anode of the third diode VD3 is electrically connected to the first selection control terminal SEL1, and the cathode of the third diode VD3 is electrically connected to the first terminal of the fourth resistor R4;

The anode of the fourth diode VD4 is electrically connected to the second selection control terminal SEL2, and the cathode of the fourth diode VD4 is electrically connected to the first end of the fourth resistor R4;

A second end of the fourth resistor R4 is electrically connected with the control end of the second switch M2;

A first end of the fifth resistor R5 is electrically connected to the ground GND, and a second end of the fifth resistor R5 is electrically connected to a first end of the fourth resistor R4;

A first end of the second switch M2 is electrically connected to the ground GND, and a second end of the second switch M2 is electrically connected to a first end of the sixth resistor R6 and the first output control terminal PS1, respectively;

A second terminal of the sixth resistor R6 is electrically connected to the high voltage signal terminal VDD.

in practical implementation, in the embodiment of the present invention, the second switch M2 may be a transistor or a Metal Oxide Semiconductor field effect transistor (MOS), which is not limited herein.

in specific implementation, in the embodiment of the present invention, the structures of the third diode VD3 and the fourth diode VD4 may be substantially the same as those of the diodes in the prior art, and are not described herein again.

in practical implementation, in the embodiment of the present invention, the resistance of the fourth resistor R4 may be 4.7k Ω, the resistance of the fifth resistor R5 may be 47k Ω, and the resistance of the sixth resistor R6 may be 4.7k Ω. Of course, the resistance value of the fourth resistor R4, the resistance value of the fifth resistor R5, and the resistance value of the sixth resistor R6 may be designed according to the practical application environment, and are not limited herein.

specifically, the main control chip 200 outputs the first sub-preset selection signal having a low level through the first selection control terminal SEL1, and then the level of the first selection control terminal SEL1 is a low level, so that the level of the second output control terminal PS2 is a low level. The second sub preset selection signal having a low level is output through the second selection control terminal SEL2, and the level of the second selection control terminal SEL2 is a low level. The third diode VD3 and the fourth diode VD4 are disconnected from each other, and the second switch M2 is controlled to be turned off, so that the level of the first output control terminal PS1 is at a high level. This enables the HDMI chip 200 to output the signal of the first HDMI input interface 110 defined by the corresponding first interface to the main control chip 200.

The main control chip 200 outputs the third sub-preset selection signal having a low level through the first selection control terminal SEL1, and then the level of the first selection control terminal SEL1 is a low level, so that the level of the second output control terminal PS2 is a low level. The fourth sub preset selection signal having a high level is output through the second selection control terminal SEL2, and the level of the second selection control terminal SEL2 is a high level. When the third diode VD3 is turned off and the fourth diode VD4 is turned on, the second switch M2 is controlled to be turned on, so that the level of the first output control terminal PS1 is at a low level. This enables the HDMI chip 200 to output the signal of the second HDMI input interface 120 defined by the second interface to the main control chip 200.

the main control chip 200 outputs the fifth sub-preset selection signal having a high level through the first selection control terminal SEL1, and the level of the first selection control terminal SEL1 is a high level, so that the level of the second output control terminal PS2 is a high level. The sixth sub preset selection signal having a low level is output through the second selection control terminal SEL2, and the level of the second selection control terminal SEL2 is a low level. When the third diode VD3 is turned on and both ends of the fourth diode VD4 are turned off, the second switch M2 is controlled to be turned on, so that the level of the first output control terminal PS1 is at a high level. This enables the HDMI chip 200 to output a signal of the third HDMI input interface 130 defined corresponding to the third interface to the main control chip 200.

Example V,

In specific implementation, in the embodiment of the present invention, the relationship between the preset selection signals pre-stored in the main control chip and the target selection signal of the HDMI switch chip may be as follows: the level of the first target selection signal is the same as the level of the third preset selection signal, the level of the second target selection signal is the same as the level of the second preset selection signal, and the level of the third target selection signal is the same as the level of the first preset selection signal. Therefore, the coupling component can be designed, so that the preset selection signal can be converted through the coupling component, the converted target selection signal can control the HDMI switch chip to select the HDMI input interface defined by the corresponding interface, and the signal input into the HDMI input interface can be accurately output to the main control chip.

Specifically, referring to table 5, the level of the first target selection signal is the same as the level of the third preset selection signal, which indicates that: the level a1 of the first sub-target selection signal is the same as the level B5 of the fifth sub-preset selection signal, and the level a2 of the second sub-target selection signal is the same as the level B6 of the sixth sub-preset selection signal. The level of the second target selection signal is the same as the level of the second preset selection signal, which means that: the level A3 of the third sub-target selection signal is the same as the level B3 of the third sub-preset selection signal, and the level a4 of the fourth sub-target selection signal is the same as the level B4 of the fourth sub-preset selection signal. The level of the third target selection signal is the same as the level of the first preset selection signal, which means that: the level a5 of the fifth sub-target selection signal is the same as the level B1 of the first sub-preset selection signal, and the level a6 of the sixth sub-target selection signal is the same as the level B2 of the second sub-preset selection signal.

Level of electricity

A1

A2

A3

A4

A5

A6

B1

—

O

—

B2

—

O

B3

—

O

—

B4

—

O

—

B5

O

—

B6

—

O

—

TABLE 5

In particular implementation, in an embodiment of the present invention, as shown in fig. 7, the coupling component 300 may include: a seventh coupling line S7, a fifth diode VD5, a sixth diode VD6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, and a third switch M3;

The second selection control terminal SEL2 is electrically connected to the second output control terminal PS2 through a seventh coupling line S7;

The anode of the fifth diode VD5 is electrically connected to the first selection control terminal SEL1, and the cathode of the fifth diode VD5 is electrically connected to the first terminal of the seventh resistor R7;

The anode of the sixth diode VD6 is electrically connected to the second selection control terminal SEL6, and the cathode of the sixth diode VD6 is electrically connected to the first end of the seventh resistor R7;

A second end of the seventh resistor R7 is electrically connected to a control end of the third switch M3;

a first end of the eighth resistor R7 is electrically connected to the ground GND, and a second end of the eighth resistor R8 is electrically connected to a first end of the seventh resistor R7;

a first end of the third switch M3 is electrically connected to the ground GND, and a second end of the third switch M3 is electrically connected to a first end of the ninth resistor R9 and the first output control terminal PS1, respectively;

A second terminal of the ninth resistor R9 is electrically connected to the high voltage signal terminal VDD.

In practical implementation, in an embodiment of the present invention, the third switch M3 may be a transistor or a Metal Oxide Semiconductor field effect transistor (MOS), which is not limited herein.

in specific implementation, in the embodiment of the present invention, the structures of the fifth diode VD5 and the sixth diode VD6 may be substantially the same as those of the diodes in the prior art, and are not described herein again.

In practical implementation, in the embodiment of the present invention, the resistance of the seventh resistor R7 may be 4.7k Ω, the resistance of the eighth resistor R8 may be 47k Ω, and the resistance of the ninth resistor R9 may be 4.7k Ω. Of course, the resistance value of the seventh resistor R7, the resistance value of the eighth resistor R8, and the resistance value of the ninth resistor R9 may be designed according to the practical application environment, and are not limited herein.

Specifically, the main control chip 200 outputs the second sub-preset selection signal having a low level through the second selection control terminal SEL2, and the level of the second selection control terminal SEL2 is a low level, so that the level of the second output control terminal PS2 is a low level. The first sub preset selection signal having a low level is output through the first selection control terminal SEL1, and the level of the first selection control terminal SEL1 is a low level. The fifth diode VD5 and the sixth diode VD6 are disconnected from each other, and the third switch M3 is controlled to be turned off, so that the level of the first output control terminal PS1 is at a high level. This enables the HDMI chip 200 to output the signal of the first HDMI input interface 110 defined by the corresponding first interface to the main control chip 200.

the main control chip 200 outputs the fourth sub-preset selection signal having a high level through the second selection control terminal SEL2, and the level of the second selection control terminal SEL2 is a high level, so that the level of the second output control terminal PS2 is a high level. The third sub preset selection signal having a high level is output through the first selection control terminal SEL1, and the level of the first selection control terminal SEL1 is a high level. When the fifth diode VD5 is turned on and both ends of the sixth diode VD6 are turned off, the third switch M3 is controlled to be turned on, so that the level of the first output control terminal PS1 is low. This enables the HDMI chip 200 to output the signal of the second HDMI input interface 120 defined by the second interface to the main control chip 200.

The main control chip 200 outputs the sixth sub-preset selection signal having a low level through the second selection control terminal SEL2, and the level of the second selection control terminal SEL2 is a low level, so that the level of the second output control terminal PS2 is a low level. The fourth sub preset selection signal having a low level is output through the first selection control terminal SEL1, and the level of the first selection control terminal SEL1 is a low level. When the two ends of the fifth diode VD5 are disconnected and the sixth diode VD6 is turned on, the third switch M3 is controlled to be turned on, so that the level of the first output control terminal PS1 is low. This enables the HDMI chip 200 to output a signal of the third HDMI input interface 130 defined corresponding to the third interface to the main control chip 200.

Example six,

In specific implementation, in the embodiment of the present invention, the relationship between the preset selection signals pre-stored in the main control chip and the target selection signal of the HDMI switch chip may be as follows: the level of the first target selection signal is the same as the level of the second preset selection signal, the level of the second target selection signal is the same as the level of the third preset selection signal, and the level of the third target selection signal is the same as the level of the first preset selection signal. Therefore, the coupling component can be designed, so that the preset selection signal can be converted through the coupling component, the converted target selection signal can control the HDMI switch chip to select the HDMI input interface defined by the corresponding interface, and the signal input into the HDMI input interface can be accurately output to the main control chip.

specifically, referring to table 6, the level of the first target selection signal is the same as the level of the second preset selection signal, which refers to: the level a1 of the first sub-target selection signal is the same as the level B3 of the third sub-preset selection signal, and the level a2 of the second sub-target selection signal is the same as the level B4 of the fourth sub-preset selection signal. The level of the second target selection signal is the same as the level of the third preset selection signal, which means that: the level A3 of the third sub-target selection signal is the same as the level B5 of the fifth sub-preset selection signal, and the level a4 of the fourth sub-target selection signal is the same as the level B6 of the sixth sub-preset selection signal. The level of the third target selection signal is the same as the level of the first preset selection signal, which means that: the level a5 of the fifth sub-target selection signal is the same as the level B1 of the first sub-preset selection signal, and the level a6 of the sixth sub-target selection signal is the same as the level B2 of the second sub-preset selection signal.

level of electricity

A1

A2

A3

A4

A5

A6

B1

—

O

—

B2

—

O

B3

O

—

B4

—

O

—

B5

—

O

—

B6

—

O

—

TABLE 6

in particular implementation, in an embodiment of the present invention, as shown in fig. 8, the coupling component 300 may include: an eighth coupling line SL8, a seventh diode VD7, an eighth diode VD8, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, and a fourth switch M4;

the second selection control terminal SEL2 is electrically connected to the first output control terminal PS1 through the eighth coupling line S8;

The anode of the seventh diode VD7 is electrically connected to the first selection control terminal SEL1, and the cathode of the seventh diode VD7 is electrically connected to the first terminal of the tenth resistor R10;

the anode of the eighth diode VD8 is electrically connected to the second selection control terminal SEL2, and the cathode of the eighth diode VD8 is electrically connected to the first end of the tenth resistor R10;

A second end of the tenth resistor R10 is electrically connected to the control end of the fourth switch M4;

a first end of the eleventh resistor R11 is electrically connected to the ground GND, and a second end of the eleventh resistor R11 is electrically connected to a first end of the tenth resistor R10;

a first end of the fourth switch M4 is electrically connected to the ground GND, and a second end of the fourth switch M4 is electrically connected to a first end of the twelfth resistor R12 and the second output control terminal PS2, respectively;

A second terminal of the twelfth resistor R12 is electrically connected to the high-voltage signal terminal VDD.

in practical implementation, in the embodiment of the present invention, the fourth switch M4 may be a transistor or a Metal Oxide Semiconductor field effect transistor (MOS), which is not limited herein.

in specific implementation, in the embodiment of the present invention, the structures of the seventh diode VD7 and the eighth diode VD8 may be substantially the same as those of the diodes in the prior art, and are not described herein again.

in practical implementation, in the embodiment of the present invention, the resistance of the tenth resistor R10 may be 4.7k Ω, the resistance of the eleventh resistor R11 may be 47k Ω, and the resistance of the twelfth resistor R12 may be 4.7k Ω. Of course, the resistance value of the tenth resistor R10, the resistance value of the eleventh resistor R11, and the resistance value of the twelfth resistor R12 may be designed according to the practical application environment, and are not limited herein.

specifically, the main control chip 200 outputs the second sub-preset selection signal having a low level through the second selection control terminal SEL2, and the level of the second selection control terminal SEL2 is a low level, so that the level of the first output control terminal PS1 is a low level. The first sub preset selection signal having a low level is output through the first selection control terminal SEL1, and the level of the first selection control terminal SEL1 is a low level. The seventh diode VD7 and the eighth diode VD8 are disconnected from each other, and the fourth switch M4 is controlled to be turned off, so that the level of the second output control terminal PS2 is at a high level. This enables the HDMI chip 200 to output the signal of the first HDMI input interface 110 defined by the corresponding first interface to the main control chip 200.

The main control chip 200 outputs the fourth sub-preset selection signal having a high level through the second selection control terminal SEL2, and the level of the second selection control terminal SEL2 is a high level, so that the level of the first output control terminal PS1 is a high level. The third sub preset selection signal having a high level is output through the first selection control terminal SEL1, and the level of the first selection control terminal SEL1 is a high level. When the seventh diode VD7 is turned on and both ends of the eighth diode VD8 are turned off, the fourth switch M4 is controlled to be turned on, so that the level of the second output control terminal PS2 is at a low level. This enables the HDMI chip 200 to output the signal of the second HDMI input interface 120 defined by the second interface to the main control chip 200.

The main control chip 200 outputs the sixth sub-preset selection signal having a low level through the second selection control terminal SEL2, and the level of the second selection control terminal SEL2 is a low level, so that the level of the first output control terminal PS1 is a low level. The fifth sub preset selection signal having a low level is output through the first selection control terminal SEL1, and the level of the first selection control terminal SEL1 is a low level. When the seventh diode VD7 is turned off and the eighth diode VD8 is turned on, the fourth switch M4 is controlled to be turned on, so that the level of the second output control terminal PS2 is at a low level. This enables the HDMI chip 200 to output a signal corresponding to the third HDMI input interface 120 defined by the third interface to the main control chip 200.

it should be noted that the voltage value of the high voltage signal terminal VDD is greater than the voltage value of the ground terminal. In practical applications, the voltage value of the high voltage signal terminal VDD may be determined according to practical application environments, and is not limited herein.

based on the same inventive concept, the embodiment of the invention also provides the circuit board prepared by the preparation method. As shown in fig. 3 to 8, the circuit board may include: the HDMI switch chip 100, the main control chip 200, and the coupling component 300; the relationship between a plurality of preset selection signals and the interface definition of the HDMI switch chip 100 is pre-stored in the main control chip 200; the HDMI switch chip 100 stores in advance the relationship between a plurality of target selection signals and interface definitions; the coupling component 300 is configured to be electrically connected between the selection control terminal of the main control chip 200 and the output control terminal of the HDMI switch chip 100 according to a relationship between a plurality of preset selection signals pre-stored in the main control chip 200 and the target selection signal of the HDMI switch chip 100. The structure of the circuit board may refer to the structure in the above embodiments, and details are not described herein.

based on the same inventive concept, the embodiment of the invention also provides a display device, which comprises the circuit board provided by the embodiment of the invention. As shown in fig. 3 to 8, the circuit board may include: the HDMI switch chip 100, the main control chip 200, and the coupling component 300; the relationship between a plurality of preset selection signals and the interface definition of the HDMI switch chip 100 is pre-stored in the main control chip 200; the HDMI switch chip 100 stores in advance the relationship between a plurality of target selection signals and interface definitions; the coupling component 300 is configured to be electrically connected between the selection control terminal of the main control chip 200 and the output control terminal of the HDMI switch chip 100 according to a relationship between a plurality of preset selection signals pre-stored in the main control chip 200 and the target selection signal of the HDMI switch chip 100. The structure of the circuit board may refer to the structure in the above embodiments, and details are not described herein.

The principle of the display device for solving the problems is similar to that of the circuit board, so the implementation of the display device can be referred to the implementation of the circuit board, and repeated details are not repeated herein.

in a specific implementation, the display device may be a television. Of course, in practical applications, the display device may also be: any product or component with a display function, such as a mobile phone, a tablet computer, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should not be construed as limiting the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. a display device, comprising: a circuit board;

2. The display device of claim 1, wherein the plurality of target selection signals comprises: a first target selection signal, a second target selection signal, and a third target selection signal; the first target selection signal corresponds to a first interface definition, the second target selection signal corresponds to a second interface definition, and the third target selection signal corresponds to a third interface definition;

3. The display device according to claim 2, wherein a level of the first target selection signal is the same as a level of the first preset selection signal, a level of the second target selection signal is the same as a level of the second preset selection signal, and a level of the third target selection signal is the same as a level of the third preset selection signal;

4. The display device according to claim 2, wherein a level of the first target selection signal is the same as a level of the second preset selection signal, a level of the second target selection signal is the same as a level of the first preset selection signal, and a level of the third target selection signal is the same as a level of the third preset selection signal;

5. The display device according to claim 2, wherein a level of the first target selection signal is the same as a level of the first preset selection signal, a level of the second target selection signal is the same as a level of the third preset selection signal, and a level of the third target selection signal is the same as a level of the second preset selection signal;

6. the display device according to claim 2, wherein a level of the first target selection signal is the same as a level of the third preset selection signal, a level of the second target selection signal is the same as a level of the first preset selection signal, and a level of the third target selection signal is the same as a level of the second preset selection signal;

7. The display device according to claim 2, wherein a level of the first target selection signal is the same as a level of the third preset selection signal, a level of the second target selection signal is the same as a level of the second preset selection signal, and a level of the third target selection signal is the same as a level of the first preset selection signal;

8. the display device according to claim 2, wherein a level of the first target selection signal is the same as a level of the second preset selection signal, a level of the second target selection signal is the same as a level of the third preset selection signal, and a level of the third target selection signal is the same as a level of the first preset selection signal;

9. A method of manufacturing a circuit board, the circuit board comprising: the HDMI switch chip and the master control chip are connected;

10. a circuit board manufactured by the manufacturing method according to claim 9, comprising: the HDMI switch comprises an HDMI switch chip, a main control chip and a coupling component;