Portable display device with screen projection and charging and discharging functions

Abstract

The utility model provides a portable display device with screen projection and charging and discharging functions. The portable display device comprises a main control module, a display screen module, a data processing module, a wireless communication module and a charging and discharging module, the display screen module and the data processing module are respectively connected with the main control module; the wireless communication module is connected with the data processing module; the main control module, the display screen module, the data processing module and the wireless communication module are respectively connected with the charging and discharging module; the main control module is provided with a Type-C interface; and the Type-C interface is connected with the charging and discharging module. According to the utility model, wired / wireless screen projection and charging services can be carried out at the same time, the user convenience is greatly improved, and the comprehensive use cost of the user is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of display products, and in particular to a portable display device with screen projection and charging and discharging functions. Background Art

[0002] With the popularity of smart terminal devices and the increasing demand for small-screen projection to large-screen, users need to carry more and more devices when going out, such as mobile phones, portable monitors, power banks, data cables and even wireless screen projectors, which is very inconvenient. In addition, it also brings another problem, that is, when the interface of the mobile device is occupied, it is difficult to perform other operations, which seriously affects the user experience. For example, when charging a mobile phone with a power bank, the charging port of the mobile phone (which is also the data transmission interface) is occupied, and wired screen projection from the small screen to the large screen cannot be performed.

[0003] Therefore, the development of a portable display device with charging, discharging and screen projection functions has become an urgent problem to be solved by technicians in this field. Utility Model Content

[0004] The technical problem to be solved by the present invention is to provide a portable display device with screen projection and charging and discharging functions, which also has wired / wireless screen projection and charging and discharging functions, greatly improving convenience and reducing the user's comprehensive usage cost.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A portable display device with screen projection and charging and discharging functions, comprising: a main control module, a display screen module, a data processing module, a wireless communication module and a charging and discharging module;

[0007] The display screen module and the data processing module are respectively connected to the main control module; the wireless communication module is connected to the data processing module; the main control module, display screen module, data processing module and wireless communication module are respectively connected to the charging and discharging module;

[0008] The main control module is provided with a Type-C interface; the Type-C interface is connected to the charging and discharging module.

[0009] Optionally, the wireless communication module is a Wi-Fi module.

[0010] Optionally, the Wi-Fi module includes a single-transmitting and single-receiving unit or a dual-transmitting and dual-receiving unit.

[0011] Optionally, the Wi-Fi module further includes an SDIO interface and / or a USB interface; both the SDIO interface and the USB interface are connected to the data processing module.

[0012] Optionally, the Wi-Fi module supports AP mode.

[0013] Optionally, the data processing module supports Miracast wireless screen projection protocol and Airplay wireless screen projection protocol.

[0014] Optionally, the charge and discharge module includes a voltage stabilizing circuit, a battery unit and a charge and discharge management unit; the charge and discharge management unit, the battery unit and the voltage stabilizing circuit are connected in sequence; the Type-C interface is connected to the charge and discharge management unit; the main control module, the display module, the data processing module and the wireless communication module are respectively connected to the voltage stabilizing circuit.

[0015] Optionally, the charge and discharge management unit is further connected to the main control module via an I2C interface.

[0016] Optionally, the battery cell is a lithium-ion battery, a lithium polymer battery or a nickel-metal hydride battery.

[0017] Optionally, the display screen module includes an LCD display screen, an LED display screen or an OLED display screen.

[0018] The beneficial effects of the present invention are as follows: the portable display device provided by the present invention has the functions of screen projection and charging and discharging, which supports smart mobile terminals to realize screen projection from small screen to large screen through the device in wired or wireless form, and also supports the use of the device to charge smart mobile terminals or other devices; it can carry out screen projection and charging services at the same time, greatly improving user convenience and reducing the user's comprehensive usage cost; thereby enhancing the practicality and market competitiveness of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure and connection of a portable display device with screen projection and charging and discharging functions provided in the first embodiment of the present invention;

[0020] Figure 2 A schematic diagram of the structure and connection of a portable display device with screen projection and charging and discharging functions provided in the second embodiment of the present invention;

[0021] Figure 3 This is a circuit structure diagram of a charging and discharging module in a portable display device with screen projection and charging and discharging functions provided in Example 2 of the present utility model.

[0022] Description of labels:

[0023] 1. Main control module; 2. Display screen module; 3. Data processing module; 4. Wireless communication module;

[0024] 5. Charge and discharge module;

[0025] 11. Type-C interface;

[0026] 51. Voltage stabilizing circuit; 52. Battery cell; 53. Charge and discharge management unit. DETAILED DESCRIPTION

[0027] In order to explain in detail the possible application scenarios, technical principles, specific solutions that can be implemented, and the purpose and effects of the present invention, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0028] References to "embodiments" herein mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the word "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.

[0029] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which the present invention belongs; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit the present application.

[0030] In the description of this utility model, the term "and / or" is used to describe a logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and both A and B exist. In addition, the character " / " in this document generally indicates that the objects before and after are in a logical "or" relationship.

[0031] In the present invention, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0032] Without further restrictions, in the present invention, the words "include", "comprise", "have" or other similar expressions used in sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0033] Consistent with the understanding in the Examination Guidelines, in this utility model, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. Furthermore, in the description of the embodiments of this utility model, "multiple" means two or more (including two), and similar expressions related to "multiple," such as "multiple groups" and "multiple times," are also understood in this manner, unless otherwise specifically defined.

[0034] In the description of the embodiments of the present invention, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present invention or facilitating the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be understood as a limitation on the embodiments of the present invention.

[0035] Unless otherwise expressly specified or limited, in the description of the embodiments of the present invention, the terms "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the technical field of the present invention, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0036] Please refer to Figure 1 , the first embodiment of the present utility model is:

[0037] This embodiment provides a portable display device with screen projection and charging and discharging functions, such as Figure 1As shown, it includes: a main control module 1, a display screen module 2, a data processing module 3, a wireless communication module 4 and a charging and discharging module 5;

[0038] The display screen module 2 and the data processing module 3 are respectively connected to the main control module 1; the wireless communication module 4 is connected to the data processing module 3; the main control module 1, the display screen module 2, the data processing module 3 and the wireless communication module 4 are respectively connected to the charging and discharging module 5;

[0039] The main control module 1 is provided with a Type-C interface 11 ; the Type-C interface 11 is connected to the charging and discharging module 5 .

[0040] The wireless communication module 4 is used to establish a wireless communication connection with an external device.

[0041] The data processing module 3 is used for encoding and decoding audio and video data to support various wireless screen projection protocols. The wireless screen projection protocols include but are not limited to Miracast, Airplay and other wireless screen projection protocols. Specifically, the data processing module can decode and process the received audio and video signals that comply with the relevant wireless screen projection protocols in real time, and then convert the decoded digital audio and video signals into a TMDS format suitable for HDMI transmission and output it to the main control module to achieve synchronous transmission of audio and video, thereby realizing wireless screen projection;

[0042] The main control module 1 is used to convert the HDMI signal sent by the data processing module into an audio and video playback signal and a display driving signal and then send it to the display module;

[0043] The display screen module 2 is used to play the audio and video playback signals transmitted by the main control module under the drive of the main control module;

[0044] The Type-C interface 11 is used to support wired projection of audio and video content; it is also used for external devices to charge the charging and discharging module, and for the charging and discharging module to discharge (i.e., charge) the external device;

[0045] The charging and discharging module 5 is used to manage the charging and discharging of the battery of the device.

[0046] In some specific implementations, the wireless communication module is a module with wireless communication function, such as a Wi-Fi module, a radio frequency module, a ZigBee wireless communication module, or a LoRa module.

[0047] In a preferred embodiment, the wireless communication module is a Wi-Fi module, including a built-in Wi-Fi antenna, capable of establishing a wireless communication connection between the device and external devices based on the Wi-Fi protocol. Furthermore, the Wi-Fi module supports AP (Access Point) mode and can be configured via software to set the Wi-Fi hotspot's network name (SSID), password, and other network parameters.

[0048] Optionally, the Wi-Fi module can be a single-transmit single-receive unit or a dual-transmit dual-receive unit. Here, the single-transmit single-receive unit, i.e., the antenna adopts a single-channel antenna mode of 1T1R (one transmitting antenna and one receiving antenna), which can be understood as a unidirectional transmission mode; the dual-transmit dual-receive unit, i.e., the antenna adopts a dual-channel antenna mode of 2T2R (two transmitting antennas and two receiving antennas), which can be understood as having bidirectional transmission capabilities. Users can flexibly configure the module based on their actual needs, specific application scenarios, and budget. A single-transmit single-receive unit can be selected if low cost and a compact structure are desired; a dual-transmit dual-receive unit can be selected if high-quality transmission (high speed, high coverage, and low interference) is desired.

[0049] Optionally, the Wi-Fi module is connected to and communicates with the data processing module through an interface such as SDIO or USB to transmit the received data to the data processing module for processing.

[0050] In some specific embodiments, the display screen module includes a display screen of a type such as an LCD display screen, an LED display screen, or an OLED display screen, etc. Preferably, the display screen module adopts an LCD display screen and includes its corresponding backlight system.

[0051] The portable display device with screen projection and charging and discharging functions provided in this embodiment has the following working principles:

[0052] (1) When a user uses a smart mobile device (such as a mobile phone, laptop computer, tablet computer, etc.) to wirelessly project the screen onto the portable display device of this embodiment (hereinafter referred to as the device):

[0053] a. If the smart mobile device is an Android phone, tablet, or a laptop with Windows 10 or above, it supports the Miracast screen projection protocol; the smart mobile device as the sender and the present device as the receiver will be connected through Wi-Fi Direct technology. The Wi-Fi Direct is a point-to-point connection technology that allows devices to connect directly without going through a Wi-Fi router or a Wi-Fi hotspot connected to the receiving device. During the Miracast screen projection process, the smart mobile device as the sender establishes a direct connection with the present device as the receiver through Wi-Fi Direct. Specifically, after turning on the Wi-Fi Direct function, the smart mobile device can search for nearby Miracast receiving devices, and the user can connect by selecting this device as the receiving device. The smart mobile device as the sender can then begin transmitting screen content to the present device as the receiver.

[0054] b. If the smart mobile device is an Apple phone or a computer running macOS, the smart mobile device, acting as the transmitter, connects to and communicates with this device via the AirPlay protocol. In this case, the Wi-Fi module in this device is configured as a hotspot. The smart mobile device searches for and connects to this device's Wi-Fi hotspot. This means the smart mobile device searches for and connects to this device's AirPlay receiver and establishes a connection. The smart mobile device, acting as the transmitter, simply opens the content (audio, video, or screen mirroring) on ​​the device, and playback begins synchronously on this device.

[0055] (2) When the user connects the smart mobile device to the device via a full-function Type-C cable, the audio and video of the smart mobile device can be projected onto the device in a wired manner for playback; at the same time, charging and discharging services can also be carried out between the device and the connected smart mobile device.

[0056] Specifically, the USB Type-C interface supports bidirectional data and power transmission, meaning it can simultaneously transmit audio and video signals and power. When a smart mobile device establishes a connection with this device via the Type-C interface, the two will negotiate signals based on the Type-C communication protocol to determine the supported Alternate Mode and PD fast charging parameters.

[0057] Then, the smart mobile device processes the image through the GPU (graphics processing unit), and then sends the video signal to this device through the Type-C interface using the Alternate Mode mode; the main control module of this device supports the corresponding Alternate Mode and can correctly receive and decode the video signal, thereby realizing audio and video screen projection.

[0058] At the same time, this device can also charge the connected smart mobile device through its charging and discharging module; or obtain power from the connected smart mobile device. Among them, the smart mobile device is required to support the PD fast charging protocol. Since both this device and the smart mobile device support the PD fast charging protocol, the PD parameters can be determined by negotiation during connection. In this way, it is possible for this device to provide power supply services for the smart mobile device; and it is possible for the smart mobile device to provide power replenishment for this device. When in the latter scenario, the smart mobile device is preferably an external power adapter.

[0059] Alternate Mode is a feature in the USB Type-C interface specification that allows the USB Type-C interface to transmit not only USB data but also other types of signals, such as video and audio. Therefore, when a smart mobile device and this device are connected via USB Type-C, the devices must negotiate signals to determine whether they will use Alternate Mode for transmission, rather than the USB protocol. This enables bidirectional data and power transfer between the smart mobile device and this device.

[0060] This embodiment provides a portable display device with screen projection and charging and discharging functions. Users can use this device to do the following two things at the same time: 1. Charge the mobile device through this device; 2. The mobile device can project audio and video content to this device for playback in a wired or wireless manner, and no additional screen projector is required for wireless screen projection. Therefore, the portable display device provided by this embodiment not only integrates wireless / wired screen projection and charging functions, but also supports the simultaneous use of the two functions. Therefore, the portable display device of this embodiment can greatly improve convenience while reducing the overall cost of use for users.

[0061] Please refer to Figure 2 and Figure 3 , the second embodiment of the present utility model is:

[0062] This embodiment is a further expansion of the first embodiment, and specifically refines the charge and discharge module therein.

[0063] The portable display device of this embodiment has the functions of screen projection and charging and discharging, such as Figure 2 As shown, the charge and discharge module 5 includes a voltage stabilizing circuit 51, a battery unit 52, and a charge and discharge management unit 53. The charge and discharge management unit 53, the battery unit 52, and the voltage stabilizing circuit 51 are connected in sequence; the Type-C interface 11 is connected to the charge and discharge management unit 53; and the main control module 1, the display module 2, the data processing module 3, and the wireless communication module 4 are respectively connected to the voltage stabilizing circuit 51.

[0064] The charge and discharge management unit supports the USB Type-C interface and the USB PD protocol, and can communicate and charge with external devices that also support the USB PD protocol (such as smart phones, tablets, laptops and other smart mobile terminals).

[0065] Furthermore, the charge and discharge management unit is also connected to the main control module via an I2C interface, so that the main control module can monitor and adjust the charge and discharge parameters in the charge and discharge module in real time.

[0066] In this embodiment, the voltage stabilizing circuit is used to manage and supply power to various modules in the portable display device;

[0067] The charge and discharge management unit is used to manage the charging of the battery in the portable display device and to manage the discharge function of the connected external device.

[0068] The battery unit is used to provide power to each module in the portable display device and the connected external devices. Optionally, the battery unit can be a lithium-ion battery, a lithium polymer battery, a nickel-metal hydride battery, or other battery types.

[0069] As a preferred embodiment, the circuit structure of the charging and discharging module is as follows: Figure 3 shown.

[0070] The charge and discharge management unit can use the SC8886 charge and discharge management chip, a synchronous bidirectional buck-boost charger controller, to manage the battery's charging and discharging processes. The SC8886 charge and discharge management chip has an I2C interface that connects to the main control module. The main control module can be used to set the charge / discharge mode and control parameters such as charging current and charging voltage.

[0071] Among them, there are 5 PMOS tubes, namely Q1, Q2, Q3, Q4 and Q5, whose G poles (gates) are respectively connected to the HD1, HD2, LD1, LD2 and BATDRV pins of the charge and discharge management chip SC8886. Here, Q1 and Q2 are called high-side MOS; Q3 and Q4 are called low-side MOS; Q5 is called BATFET switch. The D pole (drain) and S pole (source) of Q1 are connected to the input voltage VBUS_IN of the device and the D pole of Q3; the D pole and S pole of Q2 are respectively connected to the converted device system power supply voltage VSYS# and the D pole of Q4. The VSYS# is responsible for powering the subsequent load of the device system, and VSYS# is connected to the S pole of Q5; the D pole of Q5 is connected to the battery cell built into the device; the S poles of Q3 and Q4 are connected to the ground, and an inductor L6 is connected in series between the S poles of Q1 and Q2; the D pole output of Q2 is connected in parallel with multiple energy storage capacitors.

[0072] Furthermore, PMOS transistors Q1, Q2, Q3, Q4, inductor L6, and the energy storage capacitor form a switching network that cooperates with the SC8886 charge-discharge management chip to control the PWM on / off of the high-side and low-side PMOS transistors, achieving buck-boost conversion. Specifically, when the high-side PMOS is on, the input voltage VBUS_IN charges inductor L6. When the high-side PMOS is off and the low-side PMOS is on, the energy stored in the inductor flows to the load through the low-side PMOS. Simultaneously, by controlling the duty cycle of the PWM signal, the voltage across the inductor can be adjusted to achieve step-up or step-down. Furthermore, by monitoring the inductor current and adjusting the PWM duty cycle in real time, the output charge and discharge current can be controlled. The BATDRV pin of the SC8886 charge-discharge management chip is the gate drive output of the P-channel battery FET (BATFET). This pin is used to control the external P-channel MOSFET connected to the battery cell to achieve battery cell charge and discharge management.

[0073] During charging, if an external power source, such as a power adapter, is present, the BATFET can be turned on by a low-level signal on the BATDRV pin, allowing the external power source to charge the battery cell. During discharging, if only the battery cell is providing power, the BATFET can be turned on by a low-level signal on the BATDRV pin, allowing the battery cell to provide power to the system. When the BATFET is off, the system is powered by the external power source. The main control module can control the charging current via the I2C interface to protect the battery system from overheating or damage from high current.

[0074] In summary, the portable display device with screen projection and charging and discharging functions provided by the present invention supports smart mobile terminals to achieve screen projection from a small screen to a large screen through the device in wired or wireless form, and also supports the use of the device to charge smart mobile terminals or other devices. Therefore, the portable display device with screen projection and charging and discharging functions provided by the present invention can simultaneously carry out screen projection and charging services, greatly improving user convenience and reducing the user's comprehensive usage costs; thereby enhancing the practicality and market competitiveness of the display device.

[0075] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the description and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A portable display device with screen projection and charging and discharging functions, characterized in that: include: Main control module, display module, data processing module, wireless communication module and charging and discharging module; The display screen module and the data processing module are respectively connected to the main control module; the wireless communication module is connected to the data processing module; the main control module, display screen module, data processing module and wireless communication module are respectively connected to the charging and discharging module; The main control module is provided with a Type-C interface; the Type-C interface is connected to the charging and discharging module.

2. A portable display device with screen projection and charging and discharging functions as claimed in claim 1, characterized in that: The wireless communication module is a Wi-Fi module.

3. A portable display device with screen projection and charging and discharging functions as claimed in claim 2, characterized in that: The Wi-Fi module includes a single-transmitting and single-receiving unit or a dual-transmitting and dual-receiving unit.

4. The portable display device with screen projection and charging and discharging functions according to claim 2, wherein: The Wi-Fi module further includes an SDIO interface and / or a USB interface; both the SDIO interface and the USB interface are connected to the data processing module.

5. The portable display device with screen projection and charging and discharging functions according to claim 2, characterized in that: The Wi-Fi module supports AP mode.

6. The portable display device with screen projection and charging and discharging functions according to claim 1, wherein: The data processing module supports Miracast wireless screen projection protocol and Airplay wireless screen projection protocol.

7. The portable display device with screen projection and charging and discharging functions according to claim 1, wherein: The charge and discharge module includes a voltage stabilizing circuit, a battery unit and a charge and discharge management unit; the charge and discharge management unit, the battery unit and the voltage stabilizing circuit are connected in sequence; the Type-C interface is connected to the charge and discharge management unit; the main control module, the display module, the data processing module and the wireless communication module are respectively connected to the voltage stabilizing circuit.

8. The portable display device with screen projection and charging and discharging functions according to claim 7, characterized in that: The charge and discharge management unit is also connected to the main control module via an I2C interface.

9. The portable display device with screen projection and charging and discharging functions according to claim 7, wherein: The battery unit is a lithium-ion battery, a lithium polymer battery or a nickel-metal hydride battery.

10. The portable display device with screen projection and charging and discharging functions according to claim 1, wherein: The display screen module includes an LCD display screen, an LED display screen or an OLED display screen.

Images