CN214279217U - Multifunctional display expansion board - Google Patents
Multifunctional display expansion board Download PDFInfo
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- CN214279217U CN214279217U CN202120092164.7U CN202120092164U CN214279217U CN 214279217 U CN214279217 U CN 214279217U CN 202120092164 U CN202120092164 U CN 202120092164U CN 214279217 U CN214279217 U CN 214279217U
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Abstract
The utility model discloses a multi-functional display extends board, multi-functional display extends board includes: the wireless magnetic induction receiver comprises a main control module, a wireless magnetic induction receiver and a wireless receiving coil, wherein the main control module is provided with at least one external interface, and the wireless magnetic induction receiver is internally provided with the wireless receiving coil; the input end of the expansion chip is connected with the external interface of the main control module, and the output end of the expansion chip is provided with at least two expansion interfaces so as to realize the expansion of the external interface. The utility model discloses technical scheme realizes the expansion of external interface for the variety of multi-functional display expansion board increases, and the function increases.
Description
Technical Field
The utility model relates to an integrated circuit field, in particular to multi-functional display expansion board.
Background
At present, the smart education all-in-one machine is light and thin and easy to carry, so that the function expansion is seriously insufficient after the smart education all-in-one machine is structurally reduced, the function cannot be expanded outwards due to the defect of a function external interface of the smart education all-in-one machine, the function is single, and updating iteration is not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a multi-functional demonstration expansion board aims at solving the technical problem of wisdom education all-in-one function singleness.
In order to achieve the above object, the utility model provides a multifunctional display extends board, multifunctional display extends the board and includes:
the wireless magnetic induction receiver comprises a main control module, a wireless magnetic induction receiver and a wireless receiving coil, wherein the main control module is provided with at least one external interface, and the wireless magnetic induction receiver is internally provided with the wireless receiving coil;
the input end of the expansion chip is connected with the external interface of the main control module, and the output end of the expansion chip is provided with at least two expansion interfaces so as to realize the expansion of the external interface.
Preferably, the expansion interface can be a USB3.0 interface, an HDMI external interface, a touch pad interface, a printing interface, an infrared receiver control interface, a remote control interface, a display screen external interface, and the like.
Preferably, the multifunctional display expansion board further comprises a reset module, wherein the reset module comprises a first resistor, a second resistor and a first capacitor, the first resistor is connected in series to a reset pin of the expansion chip, the second resistor is connected in parallel to the first capacitor, one end of the second resistor and one end of the first capacitor are connected to a series circuit of the first resistor, and the other end of the second resistor and the other end of the first capacitor are grounded respectively.
Preferably, when the expansion interface is an infrared receiver control interface, the multifunctional display expansion board further includes an infrared receiving module, the infrared receiving module is connected to the expansion interface of the expansion chip, wherein the infrared receiving module includes an infrared receiver, a third resistor and a second capacitor, an input end of the infrared receiver is connected to the expansion interface of the expansion chip, an output end of the infrared receiver is connected to the main control module, the third resistor is connected to the second capacitor in parallel, one end of the third resistor connected to the second capacitor in parallel is connected to the output end of the infrared receiver, and the other end of the third resistor connected to the second capacitor in parallel is grounded.
Preferably, the multifunctional display expansion board further comprises an audio receiver and an audio player, and the audio receiver and the audio player are connected with the main control module through the expansion chip.
Preferably, the expansion chip adopts a VL817 model.
Preferably, the external interface of the main control module adopts a USB2.0 interface.
The utility model discloses technical scheme carries out the extension of external interface to host system through extending the chip for the external equipment of extension interface that sets up on the host system accessible extension chip, with the extension that realizes external interface, make the diversity increase of multi-functional display expansion board, the function increases.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic block diagram of the multifunctional display expansion board of the present invention;
FIG. 2 is a schematic diagram of the connection of the reset module;
fig. 3 is a schematic connection diagram of the infrared receiving module.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1-3, the present invention provides a multifunctional display expansion board 10, wherein the multifunctional display expansion board 10 comprises:
the wireless magnetic induction wireless communication system comprises a main control module 100, wherein the main control module 100 is provided with at least one external interface 110, the main control module 100 is connected with a wireless magnetic induction receiver 300, and a wireless receiving coil is arranged in the wireless magnetic induction receiver 300;
an input end of the expansion chip 200 is connected to the external interface 110 of the main control module 100, and an output end of the expansion chip 200 is provided with at least two expansion interfaces 210 to realize expansion of the external interface 110.
The expansion interface 210 may be a USB3.0 interface, an HDMI external interface, a touch pad interface, a printing interface, an infrared receiver control interface, a remote control interface, a display screen external interface, or the like.
The multifunctional display expansion board 10 further comprises a reset module, the reset module comprises a first resistor R1, a second resistor R2 and a first capacitor C1, wherein the first resistor R1 is connected in series to a reset pin of the expansion chip 200, the second resistor R2 is connected in parallel to the first capacitor C1, the second resistor R2 is connected to one end of the first capacitor C1 in series to the first resistor R1, and the second resistor R2 is connected to the other end of the first capacitor C1 in ground.
When the expansion interface 210 is an infrared receiver a1 control interface, the multifunctional display expansion board further includes an infrared receiving module, the infrared receiving module is connected to the expansion interface 210 of the expansion chip 200, wherein the infrared receiving module includes an infrared receiver a1, a third resistor R3 and a second capacitor C2, an input end of the infrared receiver a1 is connected to the expansion interface 210 of the expansion chip 200, an output end of the infrared receiver a1 is connected to the main control module, the third resistor R3 is connected to the second capacitor C2 in parallel, one end of the third resistor R3 connected to the second capacitor C2 in parallel is connected to the output end of the infrared receiver a1, and the other end of the third resistor R3 connected to the second capacitor C2 in parallel is grounded.
The multifunctional display expansion board 10 further includes an audio receiver and an audio player, and the audio receiver and the audio player are connected to the main control module 100 through the expansion chip 200.
The expansion chip 200 adopts a VL817 model.
The external interface 110 of the main control module adopts a USB2.0 interface.
According to the technical scheme, the external interface 110 is expanded to the main control module 100 through the expansion chip 200, so that the main control module 100 can be externally connected with equipment through the expansion interface 210 arranged on the expansion chip 200 to realize the expansion of the external interface 110, the diversity of the multifunctional display expansion board 10 is increased, and the functions are increased.
The above only is the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all under the concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.
Claims (7)
1. The utility model provides a multi-functional display expansion board which characterized in that, multi-functional display expansion board includes:
the wireless magnetic induction receiver comprises a main control module, a wireless magnetic induction receiver and a wireless receiving coil, wherein the main control module is provided with at least one external interface, and the wireless magnetic induction receiver is internally provided with the wireless receiving coil;
the input end of the expansion chip is connected with the external interface of the main control module, and the output end of the expansion chip is provided with at least two expansion interfaces so as to realize the expansion of the external interface.
2. The multi-functional display expansion board of claim 1, wherein the expansion interface can be a USB3.0 interface, an HDMI external interface, a touch pad interface, a printing interface, an infrared receiver control interface, a remote control interface, a display screen external interface, or the like.
3. The multi-functional display expansion board of claim 1, further comprising a reset module, wherein the reset module comprises a first resistor, a second resistor and a first capacitor, wherein the first resistor is connected in series to a reset pin of the expansion chip, the second resistor is connected in parallel to the first capacitor, one end of the second resistor and one end of the first capacitor are connected to a series connection line of the first resistor, and the other end of the second resistor and the other end of the first capacitor are grounded, respectively.
4. The multifunctional display expansion board according to claim 1, wherein when the expansion interface is an infrared receiver control interface, the multifunctional display expansion board further comprises an infrared receiving module, the infrared receiving module is connected to the expansion interface of the expansion chip, wherein the infrared receiving module comprises an infrared receiver, a third resistor and a second capacitor, an input end of the infrared receiver is connected to the expansion interface of the expansion chip, an output end of the infrared receiver is connected to the main control module, the third resistor is connected in parallel to the second capacitor, one end of the third resistor connected in parallel to the second capacitor is connected to the output end of the infrared receiver, and the other end of the third resistor connected in parallel to the second capacitor is grounded.
5. The multi-functional display expansion board of claim 1, further comprising an audio receiver and an audio player, wherein the audio receiver and the audio player are connected to the main control module through the expansion chip.
6. The multi-functional display expansion board of claim 1, wherein the expansion chip is of model VL 817.
7. The multi-functional display expansion board of claim 1, wherein the external interface of the main control module adopts a USB2.0 interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120092164.7U CN214279217U (en) | 2021-01-14 | 2021-01-14 | Multifunctional display expansion board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120092164.7U CN214279217U (en) | 2021-01-14 | 2021-01-14 | Multifunctional display expansion board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214279217U true CN214279217U (en) | 2021-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120092164.7U Active CN214279217U (en) | 2021-01-14 | 2021-01-14 | Multifunctional display expansion board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214279217U (en) |
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2021
- 2021-01-14 CN CN202120092164.7U patent/CN214279217U/en active Active
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