Wireless projection keyboard

Abstract

This invention provides a wireless screen projection keyboard, comprising a power supply module, a screen projection module, and a key module. The screen projection module is connected to the power supply module, a display device, and a screen projection device, respectively. The key module is connected to both the power supply module and the screen projection module. This wireless screen projection keyboard combines screen projection and control functions.

Description

Technical Field

[0001] This utility model relates to the field of keyboard technology, specifically to a wireless screen projection keyboard. Background Technology

[0002] Most keyboards only have input functionality, meaning users can input information into the system. However, as user demands increase, keyboards with only one function are gradually becoming insufficient. While most smartphones now have screen mirroring capabilities, allowing users to project their smartphone's content onto a display screen, current screen mirroring systems typically only support this function—projecting the content displayed on the smartphone's screen onto the display screen. Controlling the smartphone still relies on the smartphone's control panel. In other words, there is currently no keyboard that combines both screen mirroring and control functions. Utility Model Content

[0003] This invention provides a wireless screen projection keyboard, which aims to solve the problem that current keyboards cannot simultaneously perform screen projection and control functions.

[0004] In a first aspect, this utility model provides a wireless screen projection keyboard, which includes a power supply module, a screen projection module, and a key module; the screen projection module is connected to the power supply module, a display device, and a screen projection device respectively; the key module is connected to the power supply module and the screen projection module respectively.

[0005] Furthermore, the projection module includes a first control chip, an encoding module, and a wireless transmission module; the first control chip is connected to the encoding module, the button module, and the wireless transmission module respectively; the encoding module is connected to the display device; and the wireless transmission module is connected to the projection device.

[0006] Furthermore, the encoding module includes a first encoding unit and a second encoding unit; one end of the first encoding unit and the second encoding unit are both connected to the first control chip, and the other end of the first encoding unit and the second encoding unit are both connected to the display device.

[0007] Furthermore, the wireless transmission module is an integrated WIFI and Bluetooth module.

[0008] Furthermore, the button module includes a second control chip and a button array; the second control chip is connected to both the button array and the screen projection module.

[0009] Furthermore, it also includes a wireless charging module, which is connected to the power supply module.

[0010] Furthermore, the wireless charging module includes a third control chip, a transmitting coil, and a resonant capacitor; the third control chip is connected to the power supply module, the resonant capacitor, and the transmitting coil, respectively, and the resonant capacitor is connected to the transmitting coil.

[0011] Furthermore, the power supply module includes a first power chip and a second power chip; the first power chip is connected to the wireless charging module, and the second power chip is connected to the screen projection module and the button module respectively.

[0012] Furthermore, the power supply module also includes a power control unit, which is connected to the first power chip and the second power chip respectively.

[0013] Furthermore, the power control unit includes a first switching transistor, which is connected to both the first power chip and the second power chip.

[0014] This utility model discloses a wireless screen projection keyboard, which includes a power supply module, a screen projection module, and a key module connected to the power supply module. The power supply module is used to supply power to the screen projection module and the key module. The screen projection module is used to connect the screen projection device and the display device, and can project the content of the screen projection device onto the display device. At the same time, the screen projection module is also connected to the key module. In addition to realizing basic input functions, the key module can also control the screen projection device, so that the keyboard can perform both screen projection and control functions. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a block diagram of a wireless screen projection keyboard provided in an embodiment of the present invention;

[0017] Figure 2 This is a block diagram of a screen projection module provided in one embodiment of the present utility model;

[0018] Figure 3 This is a block diagram of a button module provided in one embodiment of the present invention;

[0019] Figure 4 This is a block diagram of a wireless screen projection keyboard provided in another embodiment of the present invention;

[0020] Figure 5This is a block diagram of a wireless charging module provided in an embodiment of the present invention;

[0021] Figure 6 This is a block diagram of a power supply module provided in an embodiment of the present utility model;

[0022] Figure 7 This is a circuit diagram of a power control unit provided in one embodiment of the present invention. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] It should be understood that, when used in this specification and the appended claims, the terms “comprising” and “including” indicate the presence of the described features, integrals, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, operations, elements, components and / or collections thereof.

[0025] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0026] Furthermore, the directional terms used in this invention, such as "up," "down," "front," "back," "left," "right," "inner," "outer," and "side," are only for reference to the accompanying drawings and the product's usage state. Therefore, the directional terms used are for explaining and understanding this invention, and not for limiting it. Additionally, in the accompanying drawings, structures that are similar or identical are indicated by the same reference numerals.

[0027] See Figures 1 to 7 , Figure 1 This is a block diagram of a wireless screen projection keyboard 100 provided in one embodiment of the present utility model; Figure 2 This is a block diagram of the projection module 20 provided in one embodiment of the present utility model; Figure 3This is a block diagram of a button module 30 provided in one embodiment of the present utility model; Figure 4 This is a block diagram of a wireless projection keyboard 100 provided in another embodiment of the present invention; Figure 5 This is a block diagram of a wireless charging module 40 provided in one embodiment of the present invention; Figure 6 This is a block diagram of a power supply module 10 provided in one embodiment of the present utility model; Figure 7 This is a circuit diagram of a power control unit 13 provided in one embodiment of this utility model. Figure 1 As shown, the wireless projection keyboard 100 includes a power supply module 10, a projection module 20, and a key module 30; the projection module 20 is connected to the power supply module 10, the display device 300, and the projection device 200 respectively; the key module 30 is connected to the power supply module 10 and the projection module 20 respectively.

[0028] Specifically, the wireless projection keyboard 100 may include a power supply module 10, a projection module 20, and a key module 30. The power supply module 10 is connected to both the projection module 20 and the key module 30 to provide power to them. The projection module 20 is connected to both the display device 300 and the projection device 200. The display device 300 may be a display screen, and the projection device 200 may be any electronic device with projection functionality, such as a smartphone or tablet. The projection module 20 and the projection device 200 can connect wirelessly, such as via Bluetooth or Wi-Fi. The projection module 20 and the display device 300 can be connected via a video cable. When the projection module 20 is connected to both the projection device 200 and the display device 300, the content displayed on the projection device 200 can be displayed on the display device 300.

[0029] The button module 30 is connected to the projection module 20. On one hand, it provides basic button functions, allowing users to control devices connected to the button module 30. For example, when the button module 30 is connected to a computer host, the user can control the computer host and input information. On the other hand, the button module 30 can also be used to control the projection device 200. For instance, when the projection module 20 is connected to both the projection device 200 and the display device 300, the button module 30 is also simultaneously connected to the projection module 20, allowing reverse control of the projection device 200. In other words, after the button module 30, projection module 20, display device 300, and projection device 200 establish their respective connections, the user can control the projection device 200 through the button module 30.

[0030] In practical use, if the user only needs basic input functions, the wireless projection keyboard 100 can be connected to the host normally. In this case, the wireless projection keyboard 100 will function as a regular keyboard to perform basic input functions. If the user needs to project the screen, the projection module 20 can be connected to the projection device 200, and the wireless projection keyboard 100 can be connected to the display device 300, thus establishing a connection between the projection module 20 and the display device 300. At this time, the button module 30 is also connected to the projection module 20. The user can not only project the content on the projection device 200 to the display device 300, but also control the projection device 200 through the button module 30, without needing to control it through the projection device 200 itself.

[0031] In a further embodiment, the projection module 20 includes a first control chip 21, an encoding module 22, and a wireless transmission module 23; the first control chip 21 is connected to the encoding module 22, the button module 30, and the wireless transmission module 23 respectively; the encoding module 22 is connected to the display device 300; and the wireless transmission module 23 is connected to the projection device 200. Further, the encoding module 22 includes a first encoding unit 221 and a second encoding unit 222; one end of each of the first encoding unit 221 and the second encoding unit 222 is connected to the first control chip 21, and the other end of each of the first encoding unit 221 and the second encoding unit 222 is connected to the display device 300. Further, the wireless transmission module 23 is an integrated WIFI and Bluetooth module.

[0032] The screen projection module 20 may include a first control chip 21, an encoding module 22, and a wireless transmission module 23. The encoding module 22 may include a first encoding unit 221 and a second encoding unit 222. The first encoding unit 221 may be an HDMI signal encoding unit 22, and the second encoding unit 222 may be a DP signal encoding unit 22. The first encoding unit 221 may be connected to the display device 300 through the HDMI interface on the keyboard, and the second encoding unit 222 may be connected to the display device 300 through a TYPE-C interface.

[0033] The first control chip 21 is connected to the projection device 200 via a wireless transmission module 23. The wireless transmission module 23 can be either a WIFI module or a Bluetooth module, or it can be a combined WIFI and Bluetooth module, meaning that the wireless transmission module 23 can support both WIFI and Bluetooth transmission simultaneously. The first control chip 21 can be a SOC processor. For example, when the projection device 200 is a smartphone, the smartphone can connect to the first control chip 21 via the combined WIFI and Bluetooth module, and then send projection data to the combined WIFI and Bluetooth module via a WIFI signal. The combined WIFI and Bluetooth module transmits image data to the first control chip 21 via an SDIO interface. The first control chip 21 decodes, converts, and optimizes the received projection data, and then outputs the processed image data to the first encoding unit 221 and the second encoding unit 222, respectively. The first encoding unit 221 and the second encoding unit 222 then output the processed image data to the corresponding HDMI interface and TYPE-C interface, respectively, thereby achieving connection with various display devices 300 and completing the display of projection content.

[0034] Meanwhile, the button module 30 is also connected to the screen projection module 20. The button signals generated by the button module 30 communicate with the first control chip 21 via a USB interface. After receiving the button signals, the first control chip 21 encodes them, converting the original button signals into a format suitable for mobile phone recognition, and generating a reverse control signal. This signal is then transmitted to the integrated WIFI and Bluetooth module via a serial port, and then sent back to the mobile phone via Bluetooth, ultimately realizing reverse control of the mobile phone via the keyboard.

[0035] As a further embodiment, the button module 30 includes a second control chip 31 and a button array 32; the second control chip 31 is connected to the button array 32 and the screen projection module 20 respectively.

[0036] The button module 30 may include a second control chip 31 and a button array 32. The second control chip 31 may be an MCU, which may integrate Bluetooth and 2.4G wireless function modules, allowing it to bind up to three devices via Bluetooth and one device via the 2.4G wireless function module. Figure 3Devices 1, 2, 3, and 4 are included. The row and column lines of the key array 32 are connected to the corresponding pins of the second control chip 31. The key array 32 is scanned row by row or column by column by the second control chip 31. Upon detecting a key press, a key signal is generated, and the channel is switched via the key: USB wired mode, Bluetooth mode, and 2.4G mode. In USB wired mode, the signal is transmitted to the first control chip 21, which converts it into a key encoding signal and sends it to the mobile phone via the integrated WIFI and Bluetooth module for reverse control of the mobile phone. In Bluetooth mode, it can be used as a traditional keyboard. Shortcut keys allow switching to different Bluetooth channels to connect to different devices, transmitting scanned key signals to its own Bluetooth module for controlling other devices. In 2.4G mode, it is used as a traditional keyboard with a 2.4G dongle receiver. Key signals are transmitted to the receiver via 2.4G signals. The receiver can be plugged into the host's USB port to receive signals for controlling the host.

[0037] As a further embodiment, a wireless charging module 40 is also included, which is connected to the power supply module 10. Further, the wireless charging module 40 includes a third control chip 41, a transmitting coil 43, and a resonant capacitor 42; the third control chip 41 is connected to the power supply module 10, the resonant capacitor 42, and the transmitting coil 43, respectively, and the resonant capacitor 42 is connected to the transmitting coil 43.

[0038] The wireless charging module 40 may include a third control chip 41, a transmitting coil 43, and a resonant capacitor 42. The third control chip 41 is connected to both the resonant capacitor 42 and the transmitting coil 43. The resonant capacitor 42 is also connected to the transmitting coil 43. Together, the third control chip 41, the resonant capacitor 42, and the transmitting coil 43 form a resonant circuit, generating an alternating magnetic field to wirelessly charge a mobile phone or tablet placed in a specific area. The third control chip 41 communicates with the main control board via I2C. The main control board can send control signals to the third control chip 41 to control its sleep mode and wake-up. When no device is detected in the wireless charging area for a period of time, the main control board sends a signal to put the third control chip 41 into sleep mode to reduce power consumption. When a device is detected and ready to be charged, the main control board sends a wake-up signal. When a mobile phone or tablet is fully charged, the receiving coil sends a full charge status data packet to the transmitting coil 43 to inform the third control chip 41. After receiving the data packet, the third control chip 41 immediately disconnects the power transmission to the transmitting coil 43, thereby disconnecting the power transmission, preventing overcharging and reducing power consumption. At the same time, the main control board sends a signal to put the third control chip 41 into sleep mode to reduce power consumption.

[0039] In a further embodiment, the power supply module 10 includes a first power chip 11 and a second power chip 12; the first power chip 11 is connected to the wireless charging module 40, and the second power chip 12 is connected to the screen projection module 20 and the button module 30, respectively. Further, the power supply module 10 also includes a power control unit 13, which is connected to both the first power chip 11 and the second power chip 12. Further, the power control unit 13 includes a first switching transistor Q1, which is connected to both the first power chip 11 and the second power chip 12.

[0040] The power supply module 10 may include a first power chip 11, a second power chip 12, and a power control unit 13. The power control unit 13 is connected to both the first power chip 11 and the second power chip 12. The first power chip 11 is connected to the wireless charging module 40, and the second power chip 12 is connected to both the projection module 20 and the button module 30. A PD adapter can be connected to the keyboard main interface via a TYPE-C cable and controls the power control unit 13 to output 20V via a PDsink chip. The first power chip 11 and the second power chip are voltage regulator chips or LDO chips. Based on a preset reference voltage, they can adjust the duty cycle of the output voltage or use a feedback control mechanism to ensure that the output voltage remains stable at the specific value required by each module. For example, when the load changes and causes the output voltage to fluctuate, the voltage regulator chip will quickly and automatically adjust to maintain a stable output. Stable voltage is precisely distributed to each functional module, such as the 12V required by the wireless charging module 40 and the 5V required by the projection module 20 and the button module 3017, achieving on-demand voltage supply through different voltage regulation circuit branches. Figure 7 The PDSINK_SW_L signal is used to control the on and off state of the first switch Q1. When PDSINK_SW_L is low, the first switch Q1 is turned on, and the input power supply VCC_20V_SYS of the wireless projection keyboard 100 is powered on. When there is no adapter or no valid fast charging protocol, PDSINK_SW_L is high, the first switch Q1 is turned off, and the input power supply VCC_20V_SYS of the system circuit is powered off.

[0041] The wireless projection keyboard power supply module disclosed in this utility model is used to power the projection module and the key module. The projection module is used to connect the projection device and the display device, and can project the content of the projection device onto the display device. At the same time, the projection module is also connected to the key module. In addition to realizing basic input functions, the key module can also control the projection device, so that the keyboard can perform both projection and control functions.

[0042] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A wireless projection keyboard, characterized in that, include: Power supply module; A projection module is connected to the power supply module, the display device, and the projection device. A button module is provided, which is connected to both the power supply module and the screen projection module.

2. The wireless projection keyboard of claim 1, wherein, The projection module includes a first control chip, an encoding module, and a wireless transmission module; The first control chip is connected to the encoding module, the button module, and the wireless transmission module respectively; The encoding module is connected to the display device; The wireless transmission module is connected to the screen projection device.

3. The wireless projection keyboard of claim 2, wherein, The encoding module includes a first encoding unit and a second encoding unit; One end of both the first encoding unit and the second encoding unit is connected to the first control chip, and the other end of both the first encoding unit and the second encoding unit is connected to the display device.

4. The wireless screen projection keyboard as described in claim 2, characterized in that, The wireless transmission module is an integrated WIFI and Bluetooth module.

5. The wireless screen projection keyboard as described in claim 1, characterized in that, The button module includes a second control chip and a button array; The second control chip is connected to both the button array and the screen projection module.

6. The wireless screen projection keyboard as described in claim 1, characterized in that, It also includes a wireless charging module, which is connected to the power supply module.

7. The wireless screen projection keyboard as described in claim 6, characterized in that, The wireless charging module includes a third control chip, a transmitting coil, and a resonant capacitor. The third control chip is connected to the power supply module, the resonant capacitor, and the transmitting coil, respectively, and the resonant capacitor is connected to the transmitting coil.

8. The wireless screen projection keyboard as described in claim 6, characterized in that, The power supply module includes a first power chip and a second power chip. The first power chip is connected to the wireless charging module, and the second power chip is connected to both the screen projection module and the button module.

9. The wireless screen projection keyboard as described in claim 8, characterized in that, The power supply module also includes a power control unit, which is connected to the first power chip and the second power chip respectively.

10. The wireless screen projection keyboard as described in claim 9, characterized in that, The power control unit includes a first switching transistor, which is connected to the first power chip and the second power chip respectively.

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