Projection screen picture adjusting device and projection screen equipment

Abstract

The utility model discloses a projection screen picture adjusting device and projection screen equipment, the device comprises a signal receiving and transmitting circuit and a projection screen control circuit, the signal receiving and transmitting circuit is used for converting a projection screen picture adjusting signal into a target interface signal when receiving the projection screen picture adjusting signal, and transmitting the target interface signal to the projection screen equipment; the target interface signal is transmitted to the screen projection control circuit; and the screen projection control circuit is used for determining a screen projection adjustment demand parameter according to the target interface signal, and adjusting a screen projection picture of the display equipment according to the screen projection adjustment demand parameter. Visibly, according to the utility model, the projection screen picture of the display equipment can be adjusted as required through the signal receiving circuit and the projection screen control circuit, so that the picture of the display equipment can cover the whole screen as much as possible, the black edge condition is reduced, and the watching experience feeling of audiences can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of screen projection equipment, and in particular to a screen projection picture adjustment device and a screen projection equipment. Background Art

[0002] With the rapid development of the technology market, the use of screen projection devices is becoming more and more widespread. In order to enable the audience to have a better viewing experience, the resolution of screen projection devices has developed to 1080P60Hz or even 2160P30Hz, and the quality of the projected screen has become higher definition and smoother, making the user feel as if they are personally on the scene. However, the existing screen projection technology still has the following problems: when the screen projection device is connected to the display device, the display resolution signal output by the screen projection device may cause the picture displayed by the display device to be unable to cover its entire screen, resulting in black edges, and most display devices cannot adjust the screen by themselves to fill the screen, thereby affecting the audience's viewing experience. It can be seen that it is particularly important to provide a technical solution that can adjust the projected screen. Utility Model Content

[0003] In view of this, the utility model provides a projection picture adjustment device and a projection device, which can make the picture of the display device cover the entire screen as much as possible, reduce the occurrence of black edges, and thus improve the audience's viewing experience.

[0004] In order to solve the above technical problems, the first aspect of the present utility model discloses a projection screen adjustment device, the device comprising a signal receiving and sending circuit and a projection screen control circuit, wherein:

[0005] The output end of the signal receiving and transmitting circuit is electrically connected to the input end of the screen projection control circuit, the output end of the screen projection control circuit is used to electrically connect to a display device, and the voltage end of the signal receiving and transmitting circuit and the voltage end of the screen projection control circuit are both used to electrically connect to the power supply end of the power supply circuit;

[0006] The signal receiving and transmitting circuit is used to convert the projection screen adjustment signal into a target interface signal when receiving the projection screen adjustment signal, and transmit the target interface signal to the projection screen control circuit;

[0007] The screen projection control circuit is used to determine the screen projection adjustment requirement parameters according to the received target interface signal, and to adjust the projection image of the display device according to the screen projection adjustment requirement parameters.

[0008] As an optional implementation, in the first aspect of the utility model, the signal receiving and transmitting circuit includes a signal receiving module and a signal conversion module, wherein:

[0009] The output end of the signal receiving module is electrically connected to the receiving end of the signal conversion module, the output end of the signal conversion module is electrically connected to the input end of the screen projection control circuit, and the voltage end of the signal conversion module is used to electrically connect to the power supply end of the power supply circuit.

[0010] As an optional implementation, in the first aspect of the utility model, the signal receiving and transmitting circuit further includes an impedance adjustment module, the impedance adjustment module includes a first impedance adjustment component, a second impedance adjustment component and a third impedance adjustment component, wherein:

[0011] The first end of the first impedance adjustment component is electrically connected to the output end of the signal receiving module and the first end of the second impedance adjustment component, and the second end of the first impedance adjustment component is used for grounding;

[0012] The second end of the second impedance adjustment component is electrically connected to the first end of the third impedance adjustment component and the receiving end of the signal conversion module, and the second end of the third impedance adjustment component is used for grounding.

[0013] As an optional implementation, in the first aspect of the utility model, the screen projection control circuit includes a screen projection control module and a screen projection signal output module, wherein:

[0014] The input end of the screen projection control module is electrically connected to the output end of the signal conversion module, the output end of the screen projection control module is electrically connected to the input end of the screen projection signal output module, the output end of the screen projection signal output module is used to electrically connect to the display device, and the voltage end of the screen projection control module is used to electrically connect to the power supply end of the power supply circuit;

[0015] The screen projection control module is used to determine the screen projection adjustment requirement parameters according to the received target interface signal, and determine the target screen projection signal according to the screen projection adjustment requirement parameters, so as to transmit the target screen projection signal to the screen projection signal output module;

[0016] The screen projection signal output module is used to convert the original screen projection image of the display device to a target screen projection image matching the target screen projection signal according to the received target screen projection signal.

[0017] As an optional implementation, in the first aspect of the utility model, the device further includes a voltage acquisition circuit, and the voltage acquisition circuit includes a voltage acquisition module, a first filtering module and an overvoltage protection module, wherein:

[0018] The voltage acquisition end of the voltage acquisition module is used to electrically connect to the power supply end of the power supply circuit, the voltage sending end of the voltage acquisition module is electrically connected to the voltage end of the signal conversion module and the voltage end of the screen projection control module, and the data transmission end of the voltage acquisition module is electrically connected to the data transmission end of the screen projection control module;

[0019] The first end of the first filter module and the first end of the overvoltage protection module are both electrically connected to the voltage sending end of the voltage acquisition module, and the second end of the first filter module and the second end of the overvoltage protection module are both grounded.

[0020] As an optional implementation, in the first aspect of the utility model, the voltage acquisition circuit further includes an electrostatic protection module, wherein:

[0021] The first end of the electrostatic protection module is electrically connected to the data transmission end of the voltage acquisition module, and the second end of the electrostatic protection module is used for grounding.

[0022] As an optional implementation, in the first aspect of the utility model, the device further includes a voltage conversion circuit, and the voltage conversion circuit includes a voltage conversion module and a voltage dividing module, wherein:

[0023] The voltage input end of the voltage conversion module is electrically connected to the voltage sending end of the voltage acquisition module, the voltage output end of the voltage conversion module is electrically connected to the first end of the voltage divider module, the voltage control end of the voltage conversion module is electrically connected to the second end of the voltage divider module and the voltage end of the screen projection control module, and the third end of the voltage divider module is used for grounding.

[0024] As an optional implementation, in the first aspect of the utility model, the voltage conversion circuit further includes a second filtering module, the second filtering module includes a first filtering component, a second filtering component and a third filtering component, wherein:

[0025] The first end of the first filter component is electrically connected to the voltage control end of the voltage conversion module, the second end of the first filter component is electrically connected to the first end of the second filter component, the second end of the voltage divider module, the first end of the third filter component and the voltage end of the projection control module, the second end of the third filter component is electrically connected to the first end of the voltage divider module, and the second end of the second filter component is used for grounding.

[0026] As an optional implementation, in the first aspect of the utility model, the overvoltage protection module includes a diode, wherein:

[0027] The cathode of the diode is electrically connected to the voltage sending end of the voltage acquisition module, and the anode of the diode is grounded.

[0028] The second aspect of the utility model discloses a screen projection device, which includes a shell and a circuit board arranged in the shell, and the circuit board includes a screen projection image adjustment device as described in any one of the items disclosed in the first aspect.

[0029] The implementation of this utility model has the following beneficial effects:

[0030] The utility model provides a projection picture adjustment device, which can adjust the projection picture of the display device as needed through a signal receiving and sending circuit and a projection screen control circuit. In this way, the picture of the display device can cover its entire screen as much as possible, reduce the occurrence of black edges, and thus improve the audience's viewing experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 It is a structural schematic diagram of a projection picture adjustment device disclosed in an embodiment of the utility model;

[0033] Figure 2 It is a structural schematic diagram of a signal receiving and transmitting circuit disclosed in an embodiment of the utility model;

[0034] Figure 3 It is a structural schematic diagram of a screen projection signal output module disclosed in an embodiment of the utility model;

[0035] Figure 4 It is a structural schematic diagram of a target electrostatic protection module disclosed in an embodiment of the utility model;

[0036] Figure 5 It is a structural schematic diagram of a voltage acquisition circuit disclosed in an embodiment of the utility model;

[0037] Figure 6 It is a structural schematic diagram of a voltage conversion circuit disclosed in an embodiment of the utility model;

[0038] Figure 7 It is a structural schematic diagram of a running data storage circuit disclosed in an embodiment of the utility model;

[0039] Figure 8 This is a structural schematic diagram of a screen projection data storage circuit disclosed in an embodiment of the utility model;

[0040] Fig. 9It is a structural schematic diagram of a reset control circuit disclosed in an embodiment of the utility model;

[0041] Fig.10 It is a structural schematic diagram of a screen projection device disclosed in an embodiment of the utility model. DETAILED DESCRIPTION

[0042] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that, unless otherwise clearly specified and limited, the term "electrical connection" in the specification and claims of the utility model and the above-mentioned drawings should be understood in a broad sense. For example, it can be a fixed electrical connection, a detachable electrical connection, or an integral electrical connection; it can be a mechanical electrical connection, an electrical electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. In addition, the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. The terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For those of ordinary skill in the art, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0044] Embodiment 1

[0045] See also Figure 1 , Figure 1 This is a schematic diagram of the structure of a projection screen adjustment device disclosed in an embodiment of the utility model. The device can be applied to any display device that needs to be projected, such as smart TVs, smart displays, projectors, tablet computers, desktop computers, laptops, smart phones, interactive somatosensory machines, etc., and the utility model embodiment does not limit it. Figure 1 As shown, the projection screen adjustment device includes a signal receiving and transmitting circuit 101 and a projection screen control circuit 102, wherein:

[0046] The output end of the signal receiving and transmitting circuit 101 is electrically connected to the input end of the projection control circuit 102, the output end of the projection control circuit 102 is used to electrically connect to the display device 103, and the voltage end of the signal receiving and transmitting circuit 101 and the voltage end of the projection control circuit 102 are both used to electrically connect to the power supply end of the power supply circuit 104;

[0047] The signal receiving and transmitting circuit 101 is used for converting the projection screen adjustment signal into a target interface signal when receiving the projection screen adjustment signal, and transmitting the target interface signal to the projection screen control circuit 102;

[0048] The screen projection control circuit 102 is used to determine the screen projection adjustment requirement parameters according to the received target interface signal, and adjust the projection image of the display device 103 according to the screen projection adjustment requirement parameters.

[0049] In the embodiment of the utility model, optionally, the projection screen adjustment signal can be sent by the user through a smart phone or a smart controller, and the projection screen adjustment signal can include the size parameter of the projection screen, the clarity of the projection screen, the color parameter of the projection screen, etc. Further optionally, the target interface signal can include a USB2.0 signal, a USB3.x signal, a USB4 signal, etc.

[0050] Furthermore, the device may also include an operation data storage circuit (such as Figure 7 As shown), screen projection data storage circuit (as shown Figure 8 As shown) and reset control circuit (as Fig. 9 As shown), etc., wherein the running data storage circuit is used to store the program and data being run by the projection control module in the projection control circuit 102, and the data can be called at any time during the program running, which is beneficial to the overall projection device to quickly read and write data, thereby improving the operation rate of the projection device; the projection data storage circuit is used to store the projection data of the projection device, such as the main pages and animations when the projection device is turned on, the main program running the projection device, the operation guide, the UI operation interface, the user's stored data, media files, etc.; and the reset control circuit is used to initialize and reset the circuit of the projection device or control the display mode, etc.

[0051] It can be seen that the implementation Figure 1 The described projection picture adjustment device can adjust the projection picture of the display device as needed through the signal receiving and sending circuit and the projection screen control circuit. In this way, the display device picture can be rotated horizontally / vertically and zoomed in / out proportionally, so that the picture of the display device can cover the entire screen as much as possible, reducing the occurrence of black edges, thereby improving the audience's viewing experience; at the same time, the projection screen device can be adapted to display devices of different sizes and types on the market, thereby improving the applicability of the projection screen device.

[0052] In an optional embodiment, if Figure 2 As shown, Figure 2 Schematic diagram of a signal receiving and transmitting circuit disclosed in an embodiment of the utility model. Figure 2As shown, the signal receiving and transmitting circuit 101 includes a signal receiving module JW04 and a signal conversion module UW01, wherein:

[0053] The output end of the signal receiving module JW04 is electrically connected to the receiving end of the signal conversion module UW01, the output end of the signal conversion module UW01 is electrically connected to the input end of the projection control circuit 102, and the voltage end of the signal conversion module UW01 is used to electrically connect to the power supply end of the power supply circuit 104.

[0054] In this optional embodiment, JW04 can be an onboard WIFI antenna, which can transmit the received projection picture adjustment signal to UW01, which is converted into a target interface signal, such as a USB2.0 signal, through its internal DAC.

[0055] In this optional embodiment, further, the signal receiving and transmitting circuit 101 further includes an impedance adjustment module, the impedance adjustment module includes a first impedance adjustment component CW04, a second impedance adjustment component RW03 and a third impedance adjustment component CW03, wherein:

[0056] A first end of the first impedance adjustment component CW04 is electrically connected to an output end of the signal receiving module JW04 and a first end of the second impedance adjustment component RW03, and a second end of the first impedance adjustment component CW04 is grounded;

[0057] The second end of the second impedance adjustment component RW03 is electrically connected to the first end of the third impedance adjustment component CW03 and the receiving end of the signal conversion module UW01, and the second end of the third impedance adjustment component CW03 is used for grounding.

[0058] In this optional embodiment, CW04, RW03 and CW03 in the impedance adjustment module mainly constitute the π-type circuit of the onboard WIFI antenna, which can adjust the circuit impedance of the antenna to achieve the maximum output of the antenna transmission power to achieve the best RF efficiency and index. Optionally, the structure of the second impedance adjustment component RW03 can be a single impedance adjustment resistor, multiple impedance adjustment resistors connected in series, or multiple impedance adjustment resistors connected in parallel; and the first impedance adjustment component CW04 and the third impedance adjustment component CW03 can both be a single impedance adjustment capacitor or multiple impedance adjustment capacitors connected in parallel.

[0059] Furthermore, the screen projection control circuit 102 includes a screen projection control module and a screen projection signal output module JH01 (such as Figure 3 ), where:

[0060] The input end of the projection control module is electrically connected to the output end of the signal conversion module UW01, the output end of the projection control module is electrically connected to the input end of the projection signal output module JH01, the output end of the projection signal output module JH01 is used to electrically connect to the display device 103, and the voltage end of the projection control module is used to electrically connect to the power supply end of the power supply circuit 104;

[0061] The screen projection control module is used to determine the screen projection adjustment requirement parameters according to the received target interface signal, and determine the target screen projection signal according to the screen projection adjustment requirement parameters, so as to transmit the target screen projection signal to the screen projection signal output module JH01;

[0062] The screen projection signal output module JH01 is used to convert the original screen projection picture of the display device 103 to a target screen projection picture matching the target screen projection signal according to the received target screen projection signal.

[0063] In this optional embodiment, optionally, the screen projection control circuit 102 may further include a target filtering module CH03, wherein:

[0064] The first end of the target filter module CH03 is electrically connected to the voltage end of the projection signal output module JH01, and the voltage end of the projection signal output module JH01 is used to electrically connect to the power supply end of the power supply circuit 104, and the second end of the target filter module CH03 is used for grounding.

[0065] Among them, the target filtering module CH03 can be a single filtering capacitor or a plurality of filtering capacitors connected in parallel.

[0066] Further optionally, the projection control circuit 102 may also include target electrostatic protection modules UH01 to UH03 (such as Figure 4 ), where:

[0067] The first end of the target electrostatic protection module UH01~UH03 is electrically connected to the output end of the screen projection control module, and the second end of the target electrostatic protection module UH01~UH03 is electrically connected to the input end of the screen projection signal output module JH01.

[0068] It can be seen that this optional embodiment can flexibly construct the signal receiving and sending circuit and the screen projection control circuit, and flexibly select the components according to the actual situation. In this way, the construction reliability and accuracy of the signal receiving and sending circuit and the screen projection control circuit can be improved, and then the stability and security of the overall circuit and communication can be ensured while satisfying the basic signal receiving and sending and signal analysis processes, thereby improving the efficiency of the screen projection image adjustment of the screen projection device.

[0069] In another optional embodiment, the device further includes a voltage acquisition circuit (such as Figure 5As shown), the voltage acquisition circuit includes a voltage acquisition module JP01, a first filtering module CP26 / CP27 and an overvoltage protection module DP01, wherein:

[0070] The voltage acquisition end of the voltage acquisition module JP01 is used to electrically connect to the power supply end of the power supply circuit 104, the voltage transmission end of the voltage acquisition module JP01 is electrically connected to the voltage end of the signal conversion module UW01 and the voltage end of the projection control module, and the data transmission end of the voltage acquisition module JP01 is electrically connected to the data transmission end of the projection control module;

[0071] The first end of the first filter module CP26 / CP27 and the first end of the overvoltage protection module DP01 are both electrically connected to the voltage sending end of the voltage acquisition module JP01, and the second end of the first filter module CP26 / CP27 and the second end of the overvoltage protection module DP01 are both grounded.

[0072] In this optional embodiment, the first filtering module may be as follows: Figure 5 The multiple filter capacitors connected in parallel as shown may also be a single filter capacitor, or may be other filter components that can play the same filtering role.

[0073] Furthermore, the voltage acquisition circuit also includes electrostatic protection modules DP02-DP04, wherein:

[0074] The first ends of the electrostatic protection modules DP02 ˜ DP04 are electrically connected to the data transmission end of the voltage acquisition module JP01 , and the second ends of the electrostatic protection modules DP02 ˜ DP04 are grounded.

[0075] Furthermore, the overvoltage protection module DP01 includes a diode, wherein:

[0076] The cathode of the diode is electrically connected to the voltage sending end of the voltage acquisition module JP01, and the anode of the diode is used for grounding.

[0077] In this optional embodiment, the diode may also be replaced by other devices or components that can play an equivalent role in controlling the direction of electrical signal flow.

[0078] It can be seen that the implementation of this optional embodiment can obtain the voltage required by the voltage acquisition circuit and protect the circuit through the corresponding protection module. In this way, the stability and safety of the voltage acquisition circuit can be improved, and the occurrence of components in the circuit being burned out can be reduced, thereby ensuring the normal acquisition of voltage.

[0079] In yet another optional embodiment, the device further includes a voltage conversion circuit (such as Figure 6 As shown), the voltage conversion circuit includes a voltage conversion module UP05 and a voltage dividing module RP01 / RP03, wherein:

[0080] The voltage input end of the voltage conversion module UP05 is electrically connected to the voltage sending end of the voltage acquisition module JP01, the voltage output end of the voltage conversion module UP05 is electrically connected to the first end of the voltage divider module RP01 / RP03, the voltage control end of the voltage conversion module UP05 is electrically connected to the second end of the voltage divider module RP01 / RP03 and the voltage end of the projection control module, and the third end of the voltage divider module RP01 / RP03 is used for grounding.

[0081] In this optional embodiment, RP01 and RP03 in the voltage divider module may be a single resistor, a plurality of resistors connected in series, or a plurality of resistors connected in parallel.

[0082] Furthermore, the voltage conversion circuit further includes a second filtering module, the second filtering module includes a first filtering component LP03, a second filtering component CP31 / CP22 and a third filtering component CP03, wherein:

[0083] The first end of the first filter component LP03 is electrically connected to the voltage control end of the voltage conversion module UP05, the second end of the first filter component LP03 is electrically connected to the first end of the second filter component CP31 / CP22, the second end of the voltage divider module RP01 / RP03, the first end of the third filter component CP03 and the voltage end of the projection control module, the second end of the third filter component CP03 is electrically connected to the first end of the voltage divider module RP01 / RP03, and the second end of the second filter component CP31 / CP22 is used for grounding.

[0084] In this optional embodiment, optionally, the first filter component LP03 can be a single filter inductor or a plurality of filter inductors connected in series, and the second filter component CP31 / CP22 and the third filter component CP03 can be a single filter capacitor or a plurality of filter capacitors connected in parallel. Further optionally, the specific circuit structure of the voltage conversion circuit corresponding to the projection signal output module, the signal receiving and sending circuit, the operation data storage circuit, the projection data storage circuit and the reset control circuit can be constructed with reference to this embodiment.

[0085] It can be seen that the implementation of this optional embodiment can divide the voltage obtained from the voltage acquisition circuit and output it to the projection control module and other circuit modules, and filter the circuit module where it is located through the corresponding filtering module. In this way, the stability and safety of the voltage conversion circuit can be improved, and the normal transmission of the divided voltage can be ensured, thereby ensuring the normal acquisition of the voltage of the corresponding circuit module.

[0086] In summary, combined with Figure 1-Figure 9 The working principle of the projection screen adjustment device in the embodiment of the utility model is described as follows:

[0087] When the onboard antenna (i.e., the signal receiving module) in the signal receiving and transmitting circuit of the device receives the projection picture adjustment signal sent by the user, such as adjusting the projection picture ratio from 4:3 to 16:9, the onboard antenna sends the projection picture adjustment signal to the signal conversion module, and then the signal conversion module converts the projection picture adjustment signal into a target interface signal - a USB2.0 signal, and sends the USB2.0 signal to the projection control module, so that the projection control module performs calculations based on the USB2.0 signal to determine the projection adjustment requirement parameters, such as the projection picture length needs to be extended by 4cm and the width needs to be extended by 2cm, and further determines the target projection signal, such as a transition modulation differential signal, a digital down-conversion signal, and a hot plug detection signal, etc., so as to transmit the target projection signal to the projection signal output module, so that the projection signal output module can extend the length of the original projection picture of the display device by 4cm and the width by 2cm according to the target projection signal, so as to achieve a 16:9 picture ratio and display the target projection picture.

[0088] Embodiment 2

[0089] See also Fig.10 , Fig.10 It is a structural schematic diagram of a screen projection device disclosed in an embodiment of the utility model, and the screen projection device includes a shell and a circuit board arranged in the shell, and the circuit board includes any one of the screen projection picture adjustment devices as in Example 1. Optionally, the screen projection device can be applied to any display device that needs to be projected, such as smart TVs, smart displays, projectors, tablet computers, desktop computers, laptops, smart phones, interactive somatosensory machines, etc., and the embodiments of the utility model are not limited. It should be noted that for a detailed description of a screen projection picture adjustment device, please refer to the specific description of the relevant content in Example 1, which will not be repeated in this embodiment.

[0090] It can be seen that the implementation Fig.10 The described screen projection device can adjust the projected screen of the display device as needed, so that the screen of the display device can be rotated horizontally / vertically and zoomed in / out, so that the screen of the display device can cover the entire screen as much as possible, reducing the occurrence of black edges, thereby improving the audience's viewing experience; at the same time, it can also adapt to display devices of different sizes and types on the market, thereby improving the applicability of the screen projection device.

[0091] The above is a detailed introduction to a projection picture adjustment device and a projection equipment disclosed in an embodiment of the utility model. Specific embodiments are used in this article to illustrate the principle and implementation mode of the utility model, but the above preferred embodiments are not used to limit the utility model. The description of the above embodiments is only used to help understand the method of the utility model and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the utility model, without departing from the spirit and scope of the utility model, there will be changes in the specific implementation mode and the scope of application. Therefore, the scope of protection of the utility model is defined by the claims.

Claims

1. A projection screen adjustment device, characterized in that: The device includes a signal receiving and sending circuit and a screen projection control circuit, wherein: The output end of the signal receiving and transmitting circuit is electrically connected to the input end of the screen projection control circuit, the output end of the screen projection control circuit is used to electrically connect to a display device, and the voltage end of the signal receiving and transmitting circuit and the voltage end of the screen projection control circuit are both used to electrically connect to the power supply end of the power supply circuit; The signal receiving and transmitting circuit is used to convert the projection screen adjustment signal into a target interface signal when receiving the projection screen adjustment signal, and transmit the target interface signal to the projection screen control circuit; The screen projection control circuit is used to determine the screen projection adjustment requirement parameters according to the received target interface signal, and to adjust the projection image of the display device according to the screen projection adjustment requirement parameters.

2. A projection screen adjustment device according to claim 1, characterized in that: The signal receiving and transmitting circuit includes a signal receiving module and a signal conversion module, wherein: The output end of the signal receiving module is electrically connected to the receiving end of the signal conversion module, the output end of the signal conversion module is electrically connected to the input end of the screen projection control circuit, and the voltage end of the signal conversion module is used to electrically connect to the power supply end of the power supply circuit.

3. The projection image adjustment device according to claim 2, characterized in that: The signal receiving and transmitting circuit further includes an impedance adjustment module, and the impedance adjustment module includes a first impedance adjustment component, a second impedance adjustment component and a third impedance adjustment component, wherein: The first end of the first impedance adjustment component is electrically connected to the output end of the signal receiving module and the first end of the second impedance adjustment component, and the second end of the first impedance adjustment component is used for grounding; The second end of the second impedance adjustment component is electrically connected to the first end of the third impedance adjustment component and the receiving end of the signal conversion module, and the second end of the third impedance adjustment component is used for grounding.

4. A projection image adjustment device according to claim 2 or 3, characterized in that: The screen projection control circuit includes a screen projection control module and a screen projection signal output module, wherein: The input end of the screen projection control module is electrically connected to the output end of the signal conversion module, the output end of the screen projection control module is electrically connected to the input end of the screen projection signal output module, the output end of the screen projection signal output module is used to electrically connect to the display device, and the voltage end of the screen projection control module is used to electrically connect to the power supply end of the power supply circuit; The screen projection control module is used to determine the screen projection adjustment requirement parameters according to the received target interface signal, and determine the target screen projection signal according to the screen projection adjustment requirement parameters, so as to transmit the target screen projection signal to the screen projection signal output module; The screen projection signal output module is used to convert the original screen projection image of the display device to a target screen projection image matching the target screen projection signal according to the received target screen projection signal.

5. The projection image adjustment device according to claim 4, characterized in that: The device further includes a voltage acquisition circuit, which includes a voltage acquisition module, a first filtering module and an overvoltage protection module, wherein: The voltage acquisition end of the voltage acquisition module is used to electrically connect to the power supply end of the power supply circuit, the voltage sending end of the voltage acquisition module is electrically connected to the voltage end of the signal conversion module and the voltage end of the screen projection control module, and the data transmission end of the voltage acquisition module is electrically connected to the data transmission end of the screen projection control module; The first end of the first filter module and the first end of the overvoltage protection module are both electrically connected to the voltage sending end of the voltage acquisition module, and the second end of the first filter module and the second end of the overvoltage protection module are both grounded.

6. A projection image adjustment device according to claim 5, characterized in that: The voltage acquisition circuit also includes an electrostatic protection module, wherein: The first end of the electrostatic protection module is electrically connected to the data transmission end of the voltage acquisition module, and the second end of the electrostatic protection module is used for grounding.

7. A projection image adjustment device according to claim 5 or 6, characterized in that: The device further includes a voltage conversion circuit, which includes a voltage conversion module and a voltage dividing module, wherein: The voltage input end of the voltage conversion module is electrically connected to the voltage sending end of the voltage acquisition module, the voltage output end of the voltage conversion module is electrically connected to the first end of the voltage divider module, the voltage control end of the voltage conversion module is electrically connected to the second end of the voltage divider module and the voltage end of the screen projection control module, and the third end of the voltage divider module is used for grounding.

8. The projection image adjustment device according to claim 7, characterized in that: The voltage conversion circuit further includes a second filtering module, wherein the second filtering module includes a first filtering component, a second filtering component and a third filtering component, wherein: The first end of the first filter component is electrically connected to the voltage control end of the voltage conversion module, the second end of the first filter component is electrically connected to the first end of the second filter component, the second end of the voltage divider module, the first end of the third filter component and the voltage end of the projection control module, the second end of the third filter component is electrically connected to the first end of the voltage divider module, and the second end of the second filter component is used for grounding.

9. A projection image adjustment device according to claim 5 or 6, characterized in that: The overvoltage protection module includes a diode, wherein: The cathode of the diode is electrically connected to the voltage sending end of the voltage acquisition module, and the anode of the diode is grounded.

10. A screen projection device, comprising a housing and a circuit board disposed in the housing, characterized in that: The circuit board includes a projection image adjustment device as described in any one of claims 1-9.

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