CN218585306U - Touch screen convenient to splice or split screen and electronic equipment - Google Patents
Touch screen convenient to splice or split screen and electronic equipment Download PDFInfo
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- CN218585306U CN218585306U CN202222015862.4U CN202222015862U CN218585306U CN 218585306 U CN218585306 U CN 218585306U CN 202222015862 U CN202222015862 U CN 202222015862U CN 218585306 U CN218585306 U CN 218585306U
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Abstract
The utility model provides a touch screen convenient for splicing or splitting screen, which comprises a processor, a spliced screen and a switch module which are electrically connected with each other, wherein the spliced screen at least comprises a first spliced screen and a second spliced screen; when the switch module works in a first state, the first signal end is conducted with the second signal end, the third signal end is conducted with the fourth signal end, and the first spliced screen and the second spliced screen are connected with the driving output end of the processor after being cascaded; when the switch module works in the second state, the first signal end and the fourth signal end are conducted, the third signal end and the fourth signal end are disconnected, the first spliced screen is directly connected with the driving output end of the processor, flexible splicing or screen splitting among the touch screens is achieved, operation is simple, wires do not need to be laid again, and the touch screen splicing device is convenient to use.
Description
Technical Field
The utility model relates to a touch-sensitive screen field especially relates to a touch-sensitive screen and electronic equipment convenient to concatenation or split screen.
Background
Touch screens (Touch panels) are also called "Touch screens" and "Touch panels". One of them touch-sensitive screen is infrared touch-sensitive screen, and infrared touch-sensitive screen has two sets of opposite sides, and each group is provided with infrared transmitting tube and infrared receiving tube to the side homogeneous phase relatively, and the treater passes through polling mode drive infrared transmitting tube and infrared receiving tube work and forms the optical network, and when touching object got into the optical network, infrared light was sheltered from, and the treater acquires infrared light and is sheltered from the information and can obtain the touch point coordinate after handling the analysis to realize infrared touch function.
The infrared touch screen generally comprises a processor, a transmitting board and a receiving board, wherein a data bus for transmitting a driving signal is arranged between the processor and the transmitting board and between the processor and the receiving board, and the processor outputs the driving signal to the transmitting board or the receiving board through the data bus so as to drive the transmitting board or the receiving board to work. When the touch scanning is realized, the scanning is generally performed in a one-way mode, namely, polling scanning is performed from the right side to the left side of the infrared touch screen, or polling scanning is performed from the left side to the right side of the infrared touch screen.
The application scenes of the infrared touch screen are wide, the required size is diversified, namely, a touch screen with a large area is needed sometimes, and a touch screen with a small area is needed sometimes, so that the split joint type touch screen is provided. The spliced touch screen generally comprises a main screen and an auxiliary screen, if the touch scanning mode is still unidirectional scanning, a transmitting plate of the main screen and a transmitting plate of the auxiliary screen need to be connected with a processor after being cascaded, and a receiving plate of the main screen and a receiving plate of the auxiliary screen also need to be connected with the processor after being cascaded. Therefore, the data buses between the processor and the transmitting board and between the processor and the receiving board need to be removed and then re-arranged, but sometimes only the main screen needs to be used, and at the moment, the data buses have to be removed and re-connected, so that the problems of complex operation and inflexible splicing exist.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems in the related art, the embodiment of the present disclosure provides a touch screen and an electronic device convenient for splicing or splitting a screen, which can realize flexible splicing or splitting between multiple touch screens, and are simple in operation, do not need to lay wires again, and are relatively convenient to use.
According to a first aspect of the embodiments of the present disclosure, a touch screen convenient for splicing or splitting is provided, which includes a processor, a spliced screen, and a switch module electrically connected to each other, where the spliced screen includes at least a first spliced screen and a second spliced screen;
the processor is provided with a driving output end;
the switch module comprises a first signal end, a second signal end, a third signal end and a fourth signal end,
the first signal end is connected with the driving output end of the processor, the second signal end is connected with the input end of the second spliced screen, the third signal end is connected with the output end of the second spliced screen, and the fourth signal end is connected with the input end of the first spliced screen;
when the switch module works in a first state, the first signal end is conducted with the second signal end, the third signal end is conducted with the fourth signal end, and the first spliced screen and the second spliced screen are connected with the driving output end of the processor after being cascaded;
when the switch module works in the second state, the first signal end and the fourth signal end are conducted, the third signal end and the fourth signal end are disconnected, and the first spliced screen is directly connected with the driving output end of the processor.
According to a second aspect of the embodiments of the present disclosure, there is provided an electronic device including a touch screen facilitating splicing or splitting as set forth in any one of the above embodiments.
By applying the technical scheme of the embodiment of the disclosure, the switch module for splicing screen cascade is arranged between the first spliced screen and the second spliced screen and the processor, the working state of the switch module is controlled to realize the mutual cascade of the first spliced screen and the second spliced screen, the switch module works synchronously, or the working state of the switch module is controlled to realize the independent work of the first spliced screen or the second spliced screen, so that the flexible splicing or screen splitting among a plurality of touch screens can be realized, the operation is simple, wires do not need to be laid again, and the use is convenient.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
For a better understanding and practice, the present disclosure is described in detail below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic connection diagram of a touch screen according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a cascade of touch screens according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a cascade of touch screens according to a second embodiment of the disclosure;
fig. 4 is a schematic diagram illustrating multi-screen splicing according to an embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if as used herein may be interpreted as" at "8230; \8230when" or "when 8230; \823030, when" or "in response to a determination", depending on the context.
The embodiment of the disclosure provides a touch screen and an electronic device convenient to splice or split screen, and the touch screen convenient to splice or split screen can realize flexible splicing or split screen among a plurality of touch screens, and is simple in operation, does not need to lay wires again, and is comparatively convenient to use.
Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.
According to a first aspect of the embodiments of the present disclosure, a touch screen convenient for splicing or splitting is provided, which includes a processor 10, a spliced screen, and a switch module 30 electrically connected to each other, where the spliced screen includes at least a first spliced screen 21 and a second spliced screen 22, and the first spliced screen 21 and the second spliced screen 22 may be infrared touch screens or touch screens in other forms.
The processor 10 is configured to implement synchronous driving or independent driving of the first tiled screen 21 and the second tiled screen 22, and the specific model is not limited. The processor has at least drive outputs (102 and 103).
The switch module 30 is used for realizing cascade connection between the first spliced screen 21 and the second spliced screen 22 and connection between the two touch screens and the processor. The switch module 30 includes a first signal terminal 301, a second signal terminal 302, a third signal terminal 303, and a fourth signal terminal 304, wherein the first signal terminal 301 can be connected to the second signal terminal 302 or the fourth signal terminal 304, and the third signal terminal 303 can be connected to the fourth signal terminal 304.
The first signal terminal 301 is connected to the driving output terminals (102 and 103) of the processor 10, the second signal terminal 302 is connected to the input terminal of the second tiled screen 22, the third signal terminal 303 is connected to the output terminal of the second tiled screen 22, and the fourth signal terminal 304 is connected to the input terminal of the first tiled screen 21.
When the switch module 30 works in the first state, the first signal terminal 301 and the second signal terminal 302 are turned on, and the third signal terminal 303 and the fourth signal terminal 304 are turned on, so that the first tiled screen 21 and the second tiled screen 22 are connected to the driving output terminals (102 and 103) of the processor 10 after being cascaded. Therefore, the processor 10 can output a driving signal to the switch module 30 through the driving output end, transmit the driving signal to the input end of the second tiled screen 22 through the switch module 30, and transmit the driving signal of the output end of the second tiled screen 22 to the input end of the first tiled screen 21 through the switch module 30, so as to realize the cascade driving of the first tiled screen 21 and the second tiled screen 22, and can work synchronously to realize the splicing of the tiled screens.
When the switch module 30 operates in the second state, the first signal terminal 301 and the fourth signal terminal 304 are turned on, and the third signal terminal 304 and the fourth signal terminal 304 are turned off, so that the first tiled display screen 21 is directly connected to the driving output terminals (102 and 103) of the processor 10. Therefore, the processor 10 can output the driving signal to the switch module 30 through the driving output end, and directly transmit the driving signal to the input end of the first spliced screen 21 through the switch module 30, so as to drive the first spliced screen 21 to independently work, thereby realizing the split screen.
In the process of combining and splitting two touch screens, the on-off of the corresponding channel is controlled only by the switch module, the data line does not need to be cascaded to be disassembled and rearranged, the use is convenient, the time and the labor are saved, and the touch screen can be better applied to scenes with more sizes.
According to the technical scheme, the switch module used for splicing screen cascading is arranged between the first splicing screen and the second splicing screen and the processor, the switch module is controlled to work in the first working state to realize the mutual cascading of the first splicing screen and the second splicing screen, the switch module works synchronously, or the switch module works in the second working state to realize the independent work of the first splicing screen or the second splicing screen, and therefore the flexible splicing or splitting between the touch screens can be realized, the operation is simple, wires do not need to be laid again, and the use is convenient.
Alternatively, the switch module 30 may be an electronic switch or a mechanical switch.
If the switch module 30 is an electronic switch, the switch module 30 further includes a first controlled end 305, the processor 10 further has a switch control end 101, the switch control end 101 is connected to the first controlled end 305, the processor 10 sends a switch control signal to the first controlled end 305 of the switch module 30 through the switch control end 101, the switch module 30 receives the first switch control signal sent by the processor 10 and works in a first state, and the switch module 30 receives a second switch control signal sent by the processor 10 and works in a second state.
If the switch module 30 is a mechanical switch, the switch module 30 further includes a key, and when the key is in a first state (e.g., pressed), the switch module 30 operates in the first state, and when the key is in a second state (e.g., not pressed), the switch module 30 operates in the second state.
In an alternative embodiment, as shown in fig. 2, the switch module 30 may include a first switch SW1 and a second switch SW2, and the first switch SW1 and the second switch SW2 may be mechanical single-pole double-throw switches or other electronic switches. The switch module 30 may be a switch chip integrated with at least two electronic switches.
The first switch SW1 comprises a first connecting end, a second connecting end and a third connecting end, wherein the first connecting end is connected with the first signal end 301, the second connecting end is connected with the second signal end 302, and the third connecting end is suspended;
the second switch SW2 includes a fourth connection end, a fifth connection end and a sixth connection end, the fourth connection end is connected to the fourth signal end 304, the fifth connection end is connected to the third signal end 303, and the sixth connection end is connected to the first signal end 301.
Optionally, the first switch SW1 and the second switch SW2 are linked switches, and the first switch SW1 and the second switch SW2 act simultaneously with the switching operation of the user or the signal driving of the processor.
If the first switch SW1 and the second switch SW2 are electronic switches, if the first switch SW1 is in the first state in the power-off state, the first connection end is connected with the second connection end, and the first connection end is disconnected with the third connection end; when the first switch SW1 is in the second state, the first connection end is disconnected from the second connection end, and the first connection end is connected with the third connection end.
If the second switch SW2 is in the first state when losing the electric state, the fourth link is connected with the fifth link, and fourth link and sixth link disconnection, if the second switch SW2 is in the second state when getting the electric state, fourth link and fifth link disconnection, the fourth link is connected with the sixth link.
If the first switch SW1 and the second switch SW2 are electronic switches, when the switch control end of the processor 10 outputs a low level signal, the first connection end is connected to the second connection end, so that the first signal end 301 and the second signal end 302 of the switch module 30 are connected, and the fourth connection end is connected to the fifth connection end, so that the third signal end 303 and the fourth signal end 304 of the switch module are connected, and the data ends of the first tiled screen 21 and the second tiled screen 22 are connected to the driving output end of the processor after being cascaded.
At this time, the driving output end of the processor outputs a driving signal, the driving signal is transmitted to the input end of the second tiled screen 22 through the first signal end 301 and the second signal end 302 of the switch module 30, and the driving signal is transmitted to the first tiled screen 21 through the third signal end 303 and the fourth signal end 304 after being output through the output end of the second tiled screen 22, so that the first tiled screen 21 and the second tiled screen 22 can be driven simultaneously, even if the first tiled screen 21 and the second tiled screen 22 are combined and spliced into a whole touch screen.
If the first switch SW1 and the second switch SW2 are electronic switches, when the switch control end of the processor 10 outputs a high level signal, the first connection end is disconnected from the second connection end and connected to the third connection end, and meanwhile, the fourth connection end is disconnected from the fifth connection end and connected to the sixth connection end, so that the first tiled screen 21 is directly connected to the driving output end of the processor 10.
At this time, the driving output end of the processor outputs a driving signal, the driving signal is transmitted to the input end of the first spliced screen 21 through the first signal end 301 and the fourth signal end 304 of the switch module 30, the first spliced screen 21 is touched to work independently, the second spliced screen 22 does not work because the driving signal cannot be received, and the second spliced screen 22 can be taken down or left unused at this time.
The combined splicing and split screen use of the first spliced screen and the second spliced screen are realized through the control mode, the dismounting and the connection of a cascade wire are not needed, the operation is simple, and the use is convenient.
In an alternative embodiment, as shown in fig. 3, the switch module 30 may include a tri-state buffer including a not gate U4, a first transmission gate U1, a second transmission gate U2, and a third transmission gate U3;
the input end of the first transmission gate U1 and the input end of the third transmission gate U3 are connected with the first signal end 301, the output end of the first transmission gate U1 is connected with the second signal end 302, the input end of the second transmission gate U2 is connected with the third signal end 303, the output end of the second transmission gate U2 is connected with the fourth signal end 304, the input end of the third transmission gate U3 is connected with the first signal end 301, the output end of the third transmission gate U3 is connected with the fourth signal end 304, the controlled end of the first transmission gate U1, the controlled end of the second transmission gate U2 and the input end of the NOT gate U4 are connected with the switch control end 305, and the controlled end of the third transmission gate U3 is connected with the output end of the NAND gate U4.
When the switch control terminal 101 of the processor 10 outputs a low level signal, the first transmission gate U1 and the second transmission gate U2 are turned on, so that the first spliced screen 21 is cascaded with the second spliced screen 22 through the second transmission gate U2, and the second spliced screen 22 is connected with the drive output terminal 102 of the processor 10 through the first transmission gate U1.
At this time, the driving output end 102 of the processor 10 outputs a driving signal, the driving signal is transmitted to the second spliced screen 22 through the first transmission gate U1, and the second spliced screen 22 transmits the driving signal to the first spliced screen 21, so that the synchronous driving of the first spliced screen 21 and the second spliced screen 22 is realized, and the first spliced screen 21 and the second spliced screen 22 are combined and spliced into a whole touch screen.
When the switch control terminal 101 of the processor 10 outputs a high level signal, the first transmission gate U1 and the second transmission gate U2 are turned off, the not gate U4 is turned on, and the switch control signal is transmitted to the third transmission gate U3 to turn on the third transmission gate U3, so that the first tiled screen 21 is connected to the driving output terminal 102 of the processor 10 through the third transmission gate U3 and is not cascaded with the second tiled screen 22.
At this time, the driving output terminal 102 of the processor 10 outputs a driving signal, and the driving signal is transmitted to the first tiled screen 21 through the third transmission gate U31, so that the first tiled screen 21 is driven separately, and the screen splitting is realized.
In other embodiments, the switch module 30 may be implemented by other switches or combination circuits.
In an alternative embodiment, the driving output terminal of the processor 10 includes a first driving output terminal 102 and a second driving output terminal 103, the first driving output terminal 102 is connected to the first signal terminal 301 of the switch module 30, the first driving output terminal 102 is connected to the data signal port or the clock trigger port of the second tiled screen 22 and the data signal port or the clock trigger port of the first tiled screen 21 through the switch module 30, and the second driving output terminal 103 is connected to the clock trigger port or the data signal port of the first tiled screen 21 and the clock trigger port or the data signal port of the second tiled screen 22, respectively.
The processor 10 may output a data signal or a clock trigger signal to the first signal terminal 301 of the switching module 30 through a driving output terminal.
In an alternative embodiment, the first tiled screen 21 and the second tiled screen 22 have a transmitting board and a receiving board, and a plurality of shift registers on the transmitting board of the same tiled screen are cascaded with each other, and a plurality of shift registers on the receiving board of the same tiled screen are cascaded with each other. The processor 10 is connected to the transmitting board of the second tiled screen 22 and the transmitting board of the first tiled screen 21 through the switch module 30, or the processor 10 is connected to the receiving board of the second tiled screen 22 and the receiving board of the first tiled screen 21 through the switch module 30.
It should be noted that: the shift registers are provided with a data input port, a data output port and a clock port, the plurality of shift registers can be cascaded through the data output port and the data input port, and data signals can be transmitted to the data input port of the next shift register through one data output port due to the fact that data transmission is serial transmission. And if the clock signal is triggered by a rising edge, when the clock signal rises from a low level to a high level, the data moves forward by one bit, and the multi-position data output port simultaneously outputs a signal to drive the infrared geminate transistors connected to the rear end to work, so that touch scanning is realized. The register bit number of the shift register may be various bit numbers such as 1 bit, 2 bits, 4 bits, 6 bits, 8 bits, 16 bits, and in this embodiment, a shift register with 8 bit data bits may be selected.
In an optional embodiment, the touch screen further includes a third tiled screen 23, and the third tiled screen 23 is cascaded with the first tiled screen 21 and then cascaded with the second tiled screen 22, so as to implement three-screen tiling. Optionally, a fourth spliced screen may be further included, and the fourth spliced screen may be cascaded with the second spliced screen and then cascaded with the first spliced screen and the third spliced screen, so as to implement four-screen splicing.
On the basis of the splicing structure of the touch screen in the embodiment, the scanning mode can be a one-way scanning mode no matter the single-screen independent work or the multi-screen splicing simultaneous work is performed.
The processor may be disposed on the first tiled screen, the second tiled screen, or the third tiled screen, but in order to enable the first tiled screen to work independently, preferably, the processor 10 may be disposed on the first tiled screen 21, and the first tiled screen 21 is used as the main screen, and the other tiled screens are used as the sub-screens. In addition, in order to reduce the connection complexity and the length of the wire, the switch module 30 may be disposed on the first tiled screen 21.
According to the technical scheme, the first splicing screen, the second splicing screen and the processor are provided with the switch modules for splicing screen cascading, the working states of the switch modules are controlled to realize the mutual cascading of the first splicing screen and the second splicing screen, the switch modules work synchronously, or the working states of the switch modules are controlled to realize the independent work of the first splicing screen or the second splicing screen, so that the flexible splicing or screen splitting among a plurality of touch screens can be realized, the operation is simple, wires do not need to be laid again, and the use is convenient.
According to a second aspect of the present disclosure, an electronic device is provided, which includes a touch screen that is convenient to be spliced or split as described in any one of the above embodiments, and the touch screen may include several spliced screens.
The electronic device may be an interactive tablet, an intelligent blackboard, an intelligent whiteboard, a personal computer, an industrial computer, an intelligent home-control electronic device with a touch function, and the embodiment is not limited.
The above examples only show several embodiments of the present disclosure, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the concept of the present disclosure, and these changes and modifications are all within the scope of the present disclosure.
Claims (10)
1. A touch screen convenient for splicing or splitting is characterized by comprising a processor, a spliced screen and a switch module which are electrically connected with each other, wherein the spliced screen at least comprises a first spliced screen and a second spliced screen;
the processor has a drive output;
the switch module comprises a first signal end, a second signal end, a third signal end and a fourth signal end,
the first signal end is connected with the driving output end of the processor, the second signal end is connected with the input end of the second spliced screen, the third signal end is connected with the output end of the second spliced screen, and the fourth signal end is connected with the input end of the first spliced screen;
when the switch module works in a first state, the first signal end is conducted with the second signal end, the third signal end is conducted with the fourth signal end, and the first spliced screen and the second spliced screen are connected with the driving output end of the processor after being cascaded;
when the switch module works in a second state, the first signal end and the fourth signal end are conducted, the third signal end and the fourth signal end are disconnected, and the first spliced screen is directly connected with the driving output end of the processor.
2. The touch screen facilitating splicing or splitting of screens of claim 1, wherein the switch module is an electronic switch, the switch module further comprises a first controlled end, the processor further comprises a switch control end, the switch control end is connected with the first controlled end, the processor sends a switch control signal to the first controlled end of the switch module through the switch control end,
the switch module receives a first switch control signal sent by the processor and works in a first state,
and the switch module receives a second switch control signal sent by the processor and works in a second state.
3. The touch screen facilitating splicing or splitting of a screen of claim 2, wherein the switch module comprises a first switch and a second switch, the first switch and the second switch being single pole double throw switches,
the first switch comprises a first connecting end, a second connecting end and a third connecting end, the first connecting end is connected with the first signal end, the second connecting end is connected with the second signal end, and the third connecting end is suspended;
the second switch comprises a fourth connecting end, a fifth connecting end and a sixth connecting end, the fourth connecting end is connected with the fourth signal end, the fifth connecting end is connected with the third signal end, and the sixth connecting end is connected with the first signal end.
4. The touch screen facilitating splicing or splitting of the screen according to claim 3, wherein the first switch and the second switch are linked switches, and the first switch and the second switch act simultaneously with signal driving of the first controlled terminal.
5. The touch screen facilitating splicing or splitting of a screen of claim 2, wherein the switch module comprises a tri-state buffer comprising a not gate, a first transmission gate, a second transmission gate, and a third transmission gate;
the input of first transmission gate with the input of third transmission gate with first signal end is connected, the output of first transmission gate with the second signal end is connected, the input of second transmission gate with the third signal end is connected, its output with the fourth signal end is connected, the input of third transmission gate with first signal end is connected, its output with the fourth signal end is connected, the controlled end of first transmission gate, the controlled end of second transmission gate and the input of not gate all with the on-off control end is connected, the controlled end of third transmission gate with the output of not gate is connected.
6. The touch screen facilitating splicing or splitting of screens of claim 1, wherein the driving output of the processor comprises a first driving output and a second driving output, the first driving output is connected with the first signal terminal of the switch module, the first driving output is connected with the data signal port or the clock trigger port of the second spliced screen and the data signal port or the clock trigger port of the first spliced screen through the switch module,
and the second driving output end is respectively connected with the clock trigger port or the data signal port of the first spliced screen and the clock trigger port or the data signal port of the second spliced screen.
7. The touch screen facilitating splicing or splitting of a screen of claim 1, further comprising a third spliced screen, the third spliced screen being cascaded with the first spliced screen.
8. The touch screen facilitating splicing or splitting of screens of claim 1, wherein the first and second spliced screens have a transmitter board and a receiver board;
the processor is connected with the transmitting plate of the second spliced screen and the transmitting plate of the first spliced screen through the switch module, or,
the processor is connected with the receiving plate of the second spliced screen and the receiving plate of the first spliced screen through the switch module.
9. The touch screen convenient for splicing or splitting according to claim 1, wherein the touch screen adopts a unidirectional scanning mode to realize touch scanning.
10. An electronic device characterized by comprising a touch screen according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222015862.4U CN218585306U (en) | 2022-08-01 | 2022-08-01 | Touch screen convenient to splice or split screen and electronic equipment |
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| CN202222015862.4U CN218585306U (en) | 2022-08-01 | 2022-08-01 | Touch screen convenient to splice or split screen and electronic equipment |
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| CN218585306U true CN218585306U (en) | 2023-03-07 |
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