Nationwide low-power-consumption reinforced tablet terminal based on RK3588 chip

Abstract

The invention relates to a nationwide low-power-consumption reinforced tablet terminal based on an RK3588 chip, and belongs to the field of computer terminals. The hardware board card adopts a sub-module design mode and mainly comprises a core board module and a carrier board function module. Through the superposition design of the core board module and the loading board function module, the layout compactness of the device is greatly improved, and the miniaturization of the flat plate design is realized; the RK3588 chip and the peripheral function module are clamped, so that the tablet terminal has abundant functions and external interfaces; power management innovation and a plurality of man-machine interaction innovative designs are combined, so that the tablet terminal can operate with low power consumption and the use convenience of equipment is enhanced; the reinforcing design of the tablet terminal enhances the vibration impact resistance of the equipment. Domestic components are selected in the design process of the board card, the localization rate of the board card can reach 100%, and autonomous control is truly achieved.

Description

Technical Field

[0001] The present invention belongs to the field of computer terminals, and particularly relates to a domestic low-power ruggedized tablet terminal based on the RK3588 chip. Background Art

[0002] In recent years, the carry-on requirements of most terminal devices have been gradually enhanced, and ruggedized notebooks can no longer meet all current needs. A single device with rich interfaces and complete functions has strong portability, which can significantly reduce the number of actual carried equipment. With the continuous development of technology, as a portable and multi-functional mobile terminal device, ruggedized tablet terminals have been widely used in many fields such as communication and office.

[0003] There are many ARM processor manufacturers at home and abroad. According to the current latest international situation, in order to make the processor not subject to others, it is very necessary for mobile terminals to select domestic self-developed processors. Domestic ARM processor manufacturers mainly include HiSilicon, Spreadtrum, Allwinner, and Rockchip, etc. Among them, the predecessor of HiSilicon is the Huawei Integrated Circuit Design Center, and its Kirin series processors are mainly used for its own hardware platforms; Spreadtrum belongs to Tsinghua Unigroup Co., Ltd., and is committed to the development of core chips, dedicated software, and reference design platforms for wireless communication and multimedia terminals. The latest generation of its octa-core CPU model T740 has a main frequency of 1.8 GHz and supports 4K high-definition resolution and high-definition video decoding. Allwinner is a leading intelligent application processor SoC, high-performance analog device, and wireless interconnection chip design manufacturer, and has advantages in ultra-high-definition video codec and high-performance CPU / GPU / AI multi-core integration. Its most representative is the H80 octa-core processor. Rockchip is one of the most advanced processor design manufacturers in China and ranks among the top 20 global advanced chip design manufacturers. Among them, the RK3588 processor is the latest high-performance processor specifically for mobile terminals, boxes, etc. Its computing and graphics processing performance is very prominent, and it also has the advantages of rich interface functions, low power consumption, small volume, and low cost.

[0004] Based on this, the present invention designs a domestic low-power ruggedized tablet terminal based on the RK3588 chip. This design selects a domestic solution to realize the independent research and development and production of domestic ruggedized tablet products. The ruggedized design is beneficial to the high reliability and security of the equipment. Summary of the Invention

[0005] (1) Technical Problems to be Solved

[0006] The technical problem to be solved by the present invention is how to provide a domestic low-power ruggedized tablet terminal based on the RK3588 chip to solve the problems that the terminals equipped with the RK3588 chip in the prior art have insufficient interfaces and cannot meet most display control and wireless access requirements, and to overcome the difficulty that existing tablet devices cannot be independently controllable.

[0007] (2) Technical solution

[0008] To solve the above technical problems, the present invention proposes a domestic low-power ruggedized tablet terminal based on the RK3588 chip. The ruggedized tablet terminal includes: a core board module and a carrier board function module;

[0009] The core board module includes: a processor RK3588 chip, LPDDR4 / 4x memory particles CXDB5CCAM-MK, a power management chip RK806, and a DC / DC converter RK860; the power management chip RK806 realizes the unified management and distribution of the power-on timing sequence of the core board module, and the DC / DC converter RK860 is used as an auxiliary to be responsible for the power supply of high-power loads on the board;

[0010] The carrier board function module includes: a power management unit, a hardware expansion unit, a computing and storage unit, a function module unit, expansion interfaces and external interfaces, which are used to provide power management, positioning, wireless connection, data storage, screen touch operation, camera and audio, and externally provide a power port, a USB interface, an HDMI interface, a 1000Base-T network interface, a voice interface, a serial port and an antenna interface;

[0011] The ruggedized tablet terminal is designed with multiple power supply voltages for different modules, and each power supply voltage adopts a staggered power supply design; the power-on timing sequence of the whole board follows the design principle that the core board module is powered first and the carrier board function module is powered later, the low voltage is powered first and the high voltage is powered later in the same module, and the same voltage of the same module is powered on together; the power-on timing sequence is controlled by the RK3588 chip and the main power management chip RK806, and the reset of each module is controlled by the RK3588 chip; the power on and off control is performed through a control program, and at the same time, the reset and de-reset operations are completed before the Uboot is started.

[0012] (3) Beneficial effects

[0013] The present invention proposes a domestic low-power ruggedized tablet terminal based on the RK3588 chip. The hardware board of the present invention adopts a modular design method, mainly including a core board module and a carrier board function module. The core board module is designed in the physical form of a gold finger, and the point definitions of the gold finger are standardized. The carrier board function module is functionally partitioned. The core board module is connected to the carrier board function module through a 314PIN small connector and fixed with screws. This design is beneficial to the later upgrade and replacement of the main chip of the device, and the carrier board function module does not need to be redesigned. At the same time, the core board module can be synchronously applied to the carrier board modules composed of other functions. This design has strong flexibility in use, can save production costs to a certain extent, and improve the versatility of the board. The stacked design of the hardware board can make the integration degree of the whole board devices higher, reduce the board size on the basis of meeting the same functional requirements design, and is more conducive to the portability of the device.

[0014] All the components used in the design of this invention are domestic components, especially the processor, which adopts the high-end product RK3588 chip of Rockchip. RK3588 adopts a big.LITTLE architecture, with a structure of four Cortex-A76 big cores + four Cortex-A55 little cores, and has made significant optimizations in integers, floating-point numbers, memory, etc. It has revolutionary improvements in overall performance, power consumption, and core area. This chip has a high-performance dual-channel memory interface (LPDDR4 / LPDDR4x / LPDDR5), which can provide high memory bandwidth. At the same time, it provides a complete set of peripheral interfaces for applications. The overall performance is 45% higher than the previous generation, supporting better image decoding and 3D image processing capabilities, and providing faster computing speed and visual effects for mobile terminals.

[0015] The core board module in the design of this invention mainly includes: the processor RK3588 chip, the LPDDR4 / 4x memory particles CXDB5CCAM-MK of ChangXin Memory Technologies Inc., the power management chip RK806 of Rockchip, and the DC / DC converter RK860. The memory particles have a high access rate of 4266MT / s and occupy a small board space, achieving a higher storage capacity under a more compact layout; the power management chip RK806 can realize the unified management and distribution of the power-on timing of the core board module, and the DC / DC converter RK860 is used as an auxiliary to be responsible for the power supply of high-power loads on the board.

[0016] The carrier board functional module includes: a power management unit, a hardware expansion unit, a computing and storage unit, a functional module unit, expansion interfaces, and external interfaces, which can provide functions such as power management, positioning, wireless connection, data storage, screen touch operation, camera, and audio, and provide external functions such as a power port, a USB interface, an HDMI interface, a 1000Base-T network interface, a voice interface, a serial port, and an antenna interface.

[0017] The tablet terminal of this invention has multiple innovative designs for human-computer interaction and power management, realizing the low-power operation and convenience of use of the tablet. On the basis of ensuring that the tablet terminal has rich functions and external interfaces, it realizes nationalization of the design, ensures the autonomy and controllability of the product, and has important guiding significance in the field of nationalized rugged tablets.

[0018] The domestic-designed flat terminal housing of the present invention is manufactured by machining magnesium alloy, which is light in weight, high in strength, and good in thermal conductivity. The touch screen and display screen adopt an integrated full-lamination design to improve the overall stiffness. The hardware board cards improve the anti-vibration strength by reasonably designing the fixing holes and device layouts, and rubber corner guards are designed around the body to enhance the anti-vibration and shock resistance of the device; at the positions of components with higher power consumption such as the processor, heat pipe components and thermal conductive silica gel sheets with higher thermal conductivity are installed, and a heat dissipation method combining conduction, natural convection and radiation is adopted to dissipate heat quickly. The whole machine adopts silicone rubber material for waterproof sealing design. The design of the domestic flat terminal adheres to the concept of miniaturization and lightweight design, comprehensively considers factors such as strength, heat dissipation and weight, and the layout between components is reasonable and compact. Description of the Drawings

[0019] Figure 1 It is the overall hardware block diagram of the present invention, which can clearly illustrate the composition of each module of the flat terminal and the external interfaces;

[0020] Figure 2 It is the power supply design scheme of the present invention, which can clearly illustrate the power supply design of each module of the flat terminal;

[0021] Figure 3 It is the overall external view of the present invention, which can clearly show the appearance and reinforcement design form of the flat terminal. Detailed Implementation Modes

[0022] To make the objectives, content and advantages of the present invention clearer, the following further describes in detail the specific implementation modes of the present invention in conjunction with the drawings and embodiments.

[0023] The objective of the present invention is to propose a domestic low-power and ruggedized flat terminal based on the Rockchip RK3588 chip, to solve the problems that the terminals equipped with the RK3588 chip in the prior art have insufficient interfaces and cannot meet most display control and wireless access requirements, and has multiple innovative human-computer interaction designs, and reduces the overall power consumption of the whole machine through an innovative power management method. The terminal device selects a domestic solution to overcome the difficulty that existing flat devices cannot be independently controllable.

[0024] As Figure 1 shown, the present invention provides a domestic low-power and ruggedized flat terminal based on the RK3588 chip. The ruggedized flat terminal mainly includes: a core board module and a carrier board function module. The carrier board function module includes: a power management unit, a hardware expansion unit, a computing and storage unit, a function module unit, expansion interfaces and external interfaces.

[0025] The core board module mainly includes: the RK3588 processor chip, the LPDDR4 / 4x memory chips CXDB5CCAM-MK of ChangXin Memory Technology Co., Ltd., the power management chip RK806 of Rockchip, and the DC / DC converter RK860. The memory chips have a high access rate of 4266MT / s and occupy a small board space, achieving a higher storage capacity under a more compact layout; the power management chip RK806 can realize the unified management and distribution of the power-on timing of the core board module, and the DC / DC converter RK860 is used as an auxiliary to be responsible for the power supply of high-power loads on the board.

[0026] The carrier board functional module includes: a power management unit, a hardware expansion unit, a computing and storage unit, a functional module unit, expansion interfaces and external interfaces, which can provide functions such as power management, positioning, wireless connection, data storage, screen touch operation, camera and audio, and externally provide functions such as a power port, a USB interface, an HDMI interface, a 1000Base-T network interface, a voice interface, a serial port and an antenna interface.

[0027] The reinforced tablet terminal is designed with multiple power supply voltages for different modules. To avoid the high load and large current generated during simultaneous power supply from causing abnormal operation of the power chip and the battery unit, a staggered power supply design is adopted for each power supply voltage. The power-on timing of the entire board follows the design principle that the core board module is powered first and the carrier board functional module is powered later, the low voltage is powered on first and the high voltage is powered on later in the same module, and the same voltage of the same module is powered on together.

[0028] The power-on timing of the hardware board of the present invention is controlled by the RK3588 chip and the main power management chip RK806, and the reset of each module is controlled by the RK3588 chip. The power on and off control is performed through a control program, and at the same time, the reset and de-reset operations are completed before the Uboot is started.

[0029] Embodiment 1:

[0030] The present invention provides a domestic low-power reinforced tablet terminal based on the RK3588 chip. The reinforced tablet terminal mainly includes: a core board module and a carrier board functional module. The carrier board functional module includes: a power management unit, a hardware expansion unit, a computing and storage unit, a functional module unit, expansion interfaces and external interfaces;

[0031] The core board module mainly includes: an RK3588 processor, 2 pieces of 8GB LPDDR4X memory chips in total, 1 power management chip RK806 and 3 DC / DC converters RK860;

[0032] The power management unit mainly includes: a DC / DC power input isolation and voltage stabilization module, a charging chip SC8885QDER, a DC / DC switching power supply module, a lithium-ion battery and an RTC battery;

[0033] The hardware expansion unit mainly includes: a positioning module, a WIFI module, and a 5G module;

[0034] The computing and storage unit is mainly a 512GB mSATA solid-state hard drive;

[0035] The function module unit mainly includes: a touch screen, a display screen, a camera module, an audio CODEC module, and a gigabit network module;

[0036] The expansion interfaces mainly include: a Beidou antenna and a WIFI antenna;

[0037] The external interface module mainly includes: left and right side buttons, indicator lights, USB interfaces, HDMI interfaces, destruction buttons, 1000Base-T network interfaces, voice interfaces, and serial ports.

[0038] The specific technology is as follows:

[0039] The core board module uses the Rockchip RK3588 chip as the main CPU, runs the program stored in the system memory, and is equipped with two pieces of LPDDR4x with a capacity of 4GB for data caching and processing. The core board module is designed in the form of a gold finger and is connected to the carrier board function module using a 314PIN small connector. Each function interface is led out through the defined points. The points of this module mainly include: HDMI interface, USB interface, MIPI interface, SATA interface, serial port, GMAC interface, DP interface, I2C interface, PCIE interface, GPIO interface, and 5V power input interface. Each interface can be expanded and applied on the carrier board function module.

[0040] In the computing and storage unit, an mSATA electronic disk solution based on the SATA3.0 protocol is adopted, and a 512GB mSATA solid-state electronic disk is mounted for storing the system and data. The solid-state electronic disk has the characteristics of fast read and write speed, strong shock resistance, small size, light weight, less heat generation, and low power consumption, which is beneficial for the miniaturization design of the tablet and reduces the power consumption of the whole machine, thereby extending the working time.

[0041] In the hardware expansion unit, the positioning module uses Beidou positioning, integrates a Beidou antenna, and is accessed through the I2C interface, supporting the BDS global navigation satellite system for positioning data interaction; the WIFI module integrates 4 WIFI antennas, can realize the connection between the tablet device and the WIFI network and large data long-distance transmission, is connected to the core board module through USB3.0 and UART, and data transmission and control are carried out through 2 interfaces; the 5G module conducts data transmission and connection through 1 USB3.0. This module has a higher transmission speed, lower latency, and larger capacity, and can realize reliable and secure communication.

[0042] In the functional module unit, the display screen and touch screen module adopts the 10.8-inch OLED display touch screen module of the E01080015AT series from Shenzhen Everdisplay Optoelectronics Co., Ltd., with a maximum resolution of 2560×1536. The touch part uses a capacitive touch screen, supporting 10-point touch. The specific technical parameters of the integrated module of the OLED display screen and capacitive touch screen are shown in Table 1. The camera module includes a front camera and a rear camera, both of which are composed of a lens, a sensor, a flexible circuit board, and an image processing chip. MIPI0 directly output from the core board is used as the input interface for the front camera, and the light sensor chip enables the front camera to have a light sensing function; MIPI1 directly output from the core board is used as the input interface for the rear camera, and the LED flash enables the rear camera to support the flash function. I2C3 directly output from the core board is used to connect the front and rear cameras for the control function of the camera module. The audio CODEC module selects a low-power stereo audio codec chip from Nanxin, and uses the IIS interface built in the RK3588 chip to convert the left and right speakers, built-in microphone, and headphone function of the headset through the audio module. The gigabit network module adopts the scheme of mounting the domestic chip WX1860AL4 under the PCIE3.0 X4 directly output from the core board module, and externally expands 3 1000BASE-T network interfaces.

[0043] Table 1 Technical Parameters of OLED Display Touch Screen Module

[0044]

[0045]

[0046] In the external interface module, 2 USB interfaces are led out externally, expanded by a USB_HUB chip; 1 HDMI interface is directly output from the core board module; 2 RS232 serial ports and 1 RS485 serial port are expanded by a protocol conversion chip from the TTL serial port directly output from the core board module; the 1000BASE-T network interface is expanded by the domestic chip WX1860AL4. The microphone is set at the bottom of the tablet, enabling users to perform real-time voice recording. The 2 speakers are placed on the left and right sides at the bottom of the tablet, and there is also an integrated headphone jack on the headset. When it is inconvenient to use the speakers to play, switch to the headphone jack. The destruction button is used for the destruction of hard disk data, and this signal is directly connected to the hard disk; the control buttons are respectively placed on both sides of the screen, used for controlling functions such as volume and brightness. Different buttons are set by voltage division through resistors on the carrier board, and corresponding functions are matched for buttons with different voltages in the program; the indicator lights are used to display information such as the hard disk read and write speed, network connection status, tablet power-on status, and battery power status.

[0047] As Figure 2As shown in the figure, the flat-panel terminal has two power supply methods. One is when charging, the adapter's 24V passes through the DC / DC power input isolation and voltage regulation module to supply power to the system, and at the same time charges the battery. The other is when not charging, the lithium-ion battery directly supplies power to the system. The specific power supply design is introduced as follows:

[0048] When the system is charging, the adapter's 24V passes through the DC / DC isolation and voltage regulation module to output a 14V voltage and enters the charging management chip SC8885. The lithium-ion battery adopts a three-parallel and three-series battery architecture. When it is at full capacity of 6300mAh, the output voltage is 10.8V and is directly connected to the charging management chip SC8885. When the battery power is insufficient, the charging management chip adjusts the output voltage according to the voltage of the lithium-ion battery. This voltage is used as the system voltage VCC_SYS and is fed into the DC / DC switching power supply module, and at the same time charges the lithium-ion battery. When the system is not charging, the lithium-ion battery directly supplies power to the system. The RTC battery supplies power to the clock part in the system to ensure that the clock can operate stably in the system shutdown state, and when the system is powered on again, the system time of the device is consistent with the real time.

[0049] First is the power supply of the core board module. The DC / DC switching power supply module converts VCC_SYS into a 5V voltage (SYS_5V0) and feeds it into the core board. The core board module adopts a single PMIC (main power management chip) solution: 1-way PMIC (RK806) + 3-way RK860. RK806 integrates a 10-channel fast load transient synchronous buck converter, 6-way LDO regulators, and 5-way NMOS LDO high-efficiency regulators, and has configurable power-on / power-off. As the main PMIC, it manages multiple power rails, is responsible for the basic power supply of core modules such as the CPU, GPU, and memory, and peripheral circuits, and at the same time manages the power supply switching in the low-power mode. RK860 internally integrates a synchronous buck DC / DC converter, supports an output voltage of 0.5 to 1.5V, and is used for the independent power supply of high-power modules, including the high-current GPU core, high-speed interfaces, or peripheral power supply expansion.

[0050] Secondly is the power supply of each functional module on the carrier board. The DC / DC switching power supply module converts VCC_SYS into 5V (VCC_VBAT_5V) and 3.6V (VCC_3V6) to supply power to the Beidou module.

[0051] The DC / DC switching power supply module converts VCC_SYS into 3.3V (VCC_3V3_WIFI) to supply power to the WIFI module, and converts it into 3.8V (VCC_3V8) to supply power to the 5G module.

[0052] The DC / DC switching power supply module converts VCC_SYS into 3.3V (VCC_3V3_S3) in the S3 power domain. This voltage supplies power to the network card WX1860 chip, RTC chip, and camera module. At the same time, it is converted again to output 1.8V (VCC_1V8_S3) for the pull-up of the fan and related functions. This part of the power supply ensures that the tablet still has power in the sleep mode to support network communication and related functions such as RTC. VCC_SYS is converted into 1.1V (VCC_1V1_S3) in the S3 power domain, and this voltage is used to supply power to another voltage of the network card WX1860 chip.

[0053] The DC / DC switching power supply module converts VCC_SYS into 3.3V (VCC_3V3_S0) in the S0 power domain. This voltage supplies power to the solid-state drive, audio chip ES8388, serial port chip, and temperature sensor. At the same time, it is converted again to output 1.8V (VCCA_1V8), 1.8V (VDDI), and 3.3V (VCI), which are used to supply power to the audio module ES8388 and the touch screen / display module respectively.

[0054] The DC / DC switching power supply module converts VCC_SYS into a 4.2V voltage (VIN_4V2) and connects it to the Nanjing Semiconductor SC6104 chip. This chip simultaneously outputs ELVDD, ELVSS, and AVDD voltages, and the three voltages are used to supply power to the touch screen / display module. The tablet terminal can adjust the actual values of the three voltages according to the actual usage of the touch screen / display module, which is beneficial to the low-power operation of the tablet.

[0055] The DC / DC switching power supply module converts VCC_SYS into a 5.0V voltage (VCC_5V0) for the power supply of external interfaces such as USB, HDMI, speakers, and fans.

[0056] The present invention has multiple power supply voltages for different modules. To avoid the high load and large current generated during simultaneous power supply from causing abnormal operation of the power supply chip and battery unit, each power supply module adopts a power supply design with staggered peaks. The power-on timing of the entire board follows the design principle that the core board module is powered first and the carrier board functional module is powered later, the low voltage is applied first and the high voltage is applied later in the same module, and the same voltage of the same module is powered on together.

[0057] The power-on timing of the hardware board of the present invention is controlled by the RK3588 chip and the main power management chip RK806, and the reset of each module is controlled by the RK3588 chip. The power on and off control is performed through the control program, and at the same time, the reset and de-reset operations are completed before the Uboot is started.

[0058] The tablet terminal of the present invention has multiple innovative designs for human-computer interaction. First, it realizes the screen edge button design based on the successive approximation register analog-to-digital converter (SARADC), converts the analog signal into a digital signal by the method of successive approximation, and realizes multi-functional quick operation; second, it innovatively realizes the combination key function. The number of buttons on both sides of the screen is limited, and more function controls are realized through different button combinations; third, it supports the function of turning off the screen by short pressing the button and calling out the shutdown menu by long pressing, thereby enhancing the convenience of using the tablet; fourth, the communication peripherals are turned on and off with one button through the button, thereby optimizing power consumption management.

[0059] The tablet terminal of the present invention realizes power management innovation and refined power management. It adopts a true standby solution. The system is divided into a normal power supply area and a standby power-off area, and the two parts are powered independently. In normal operation, both power supply areas work normally, and the standby power-off area is designed to be powered off when in standby. Considering the improvement of the battery life of the whole machine and meeting the functional requirements of the device such as RTC and data destruction, this product is designed with three different working states: off, standby, and working.

[0060] First, in the working state, the power supply design is designed. All functional modules are powered by lithium-ion batteries. The CPU and GPU dynamically adjust the frequency and voltage according to the workload status. The RK3588 chip itself can support dynamic frequency modulation and core shutdown, so as to dynamically adjust the power input according to the demand. The actual brightness demand of the touch screen / display module will change. The system will adjust the output voltage of the Nanxin SC6104 power supply chip through the screen brightness adjustment signal. For external devices such as cameras, Beidou modules, WIFI modules, audio modules, 5G modules and network cards, users can turn off the power supply voltage of unused modules by pressing buttons according to actual use needs. The above design not only ensures the normal and stable operation of the equipment, reduces unnecessary expenses, but also saves battery power and increases battery life, ensuring that the equipment runs at lower power consumption.

[0061] Secondly, the power supply design in standby mode. The power supply in the standby power-off area is controlled by the GPIO pins of the PMIC chip and the RK3588 chip to shut down each independent power supply. In standby mode, at least four groups of power supplies are not shut down: one is the memory power DDR, the second is the GPIO power supply of the processor RK3588 chip, the third is the working power supply of the processor PLL, and the fourth is the working power supply of the processor OSC. According to actual usage needs, you can choose whether to keep the power supply of the network card WX1860 and the WIFI module.

[0062] Finally, it is the power supply design in the shutdown state. In the shutdown state of the system, the system clock module can still operate stably and reliably, ensuring that the system time of the device is consistent with the real time when the device is powered on again. The domestic tablet has a data destruction function in the shutdown state. The data destruction detection module can operate normally in the shutdown state. When the data destruction button is pressed in an emergency, the system needs to respond immediately and erase the data in the solid-state drive. At the same time, in the shutdown state, the system needs to detect the trigger of the user's power-on button. When the user presses the power-on button, the system can boot up normally.

[0063] As Figure 3 shown, the tablet terminal adopts a straight plate full-sealed structure, which is composed of a front shell assembly, a rear shell assembly and corner protectors. The structural design is carried out from aspects such as thermal design, anti-vibration and shock design, and electromagnetic compatibility design. At the same time, the characteristics of the device such as sealing, safety, reliability, and maintainability are fully considered in the design, and it can work reliably for a long time under various harsh environmental conditions.

[0064] The front and rear shell installation frames of the tablet terminal are both processed and formed from magnesium alloy, which is light in weight, high in strength, strong in toughness and shock absorption performance, and good in heat conduction performance. Vibration damping corner protectors are installed around the device to play a role in vibration isolation and buffering. A conductive rubber strip is installed on the overlapping surface of the front shell and the rear shell for shielding and sealing design. At the parts with higher power consumption such as the processor, a heat pipe assembly with a higher thermal conductivity and a thermal silicone sheet are installed, and a heat dissipation method combining conduction, natural convection and radiation is adopted to achieve the design of high heat dissipation rate in a small space.

[0065] Through the superimposed design of the core board module and the loading board function module, the present invention greatly improves the layout compactness of the components and realizes the miniaturization of the tablet design. With the support of the RK3588 chip and peripheral function modules, the tablet terminal has rich functions and external interfaces. With the support of the power management innovation and multiple human-computer interaction innovation designs, the tablet terminal can operate with low power consumption and enhance the convenience of device use. The reinforcement design of the tablet terminal enhances the anti-vibration and shock performance of the device. Domestic components are selected in the process of board design, and the domesticization rate of the board can reach 100%, truly realizing independent control.

[0066] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A national low-power ruggedized tablet terminal based on the RK3588 chip, characterized in that, The reinforced tablet terminal includes: a core board module and a carrier board function module; The core board module includes: a processor RK3588 chip, LPDDR4 / 4x memory chips CXDB5CCAM-MK, a power management chip RK806, and a DC / DC converter RK860; the power management chip RK806 realizes the unified management and distribution of the power-on sequence of the core board module, and the DC / DC converter RK860 serves as an auxiliary to be responsible for the power supply of high-power loads on the board; The carrier board function module includes: a power management unit, a hardware expansion unit, a computing and storage unit, a function module unit, expansion interfaces, and external interfaces, which are used to provide power management, positioning, wireless connection, data storage, screen touch operation, camera, and audio, and externally provide a power port, a USB interface, an HDMI interface, a 1000Base-T network interface, a voice interface, a serial port, and an antenna interface; The reinforced tablet terminal is designed with multiple power supply voltages for different modules, and each power supply voltage adopts a peak-shifting power supply design; the power-on sequence of the whole board follows the design principle that the core board module is powered first and the carrier board function module is powered later, the low voltage is powered first and the high voltage is powered later in the same module, and the same voltage of the same module is powered on together; the power-on sequence is controlled by the RK3588 chip and the main power management chip RK806, and the reset of each module is controlled by the RK3588 chip; the power on and off control is carried out through a control program, and at the same time, the reset and de-reset operations are completed before the Uboot starts.

2. The domestic low-power reinforced tablet terminal based on the RK3588 chip according to claim 1, wherein The core board module includes: an RK3588 processor, 2 pieces of a total of 8GB LPDDR4X memory chips, 1 power management chip RK806, and 3 DC / DC converters RK860; The power management unit includes: a DC / DC power input isolation and voltage stabilization module, a charging chip SC8885QDER, a DC / DC switching power supply module, a lithium-ion battery, and an RTC battery; The hardware expansion unit includes: a positioning module, a WIFI module, and a 5G module; The computing and storage unit is a 512GB mSATA solid-state drive; The function module unit includes: a touch screen, a display screen, a camera module, an audio CODEC module, and a gigabit network module; The expansion interfaces include: a Beidou antenna and a WIFI antenna; The external interface module includes: left and right side buttons, indicator lights, a USB interface, an HDMI interface, a destruction button, a 1000Base-T network interface, a voice interface, and a serial port.

3. The domestic low-power ruggedized tablet terminal based on the RK3588 chip as described in claim 1, characterized in that, The core board module uses the Rockchip RK3588 chip as the main CPU, runs the program stored in the system memory, and is equipped with two pieces of LPDDR4x with a capacity of 4GB for data caching and processing; the core board module is designed in the form of a gold finger, and is connected to the carrier board function module through a 314PIN small connector, and each function interface is led out through the defined points.

4. The domestic low-power ruggedized tablet terminal based on the RK3588 chip as claimed in claim 1, wherein In the computing storage unit, an mSATA electronic disk solution based on the SATA3.0 protocol is adopted, and a 512GB mSATA solid-state electronic disk is mounted to store the system and data.

5. The domestic low-power ruggedized tablet terminal based on the RK3588 chip according to claim 1, characterized in that, In the hardware expansion unit, the positioning module adopts Beidou positioning, integrates Beidou antenna, is accessed through the I2C interface, and supports the BDS global navigation satellite system for positioning data interaction; the WIFI module integrates 4 WIFI antennas to realize the connection between the tablet device and the WIFI network and the long-distance transmission of big data, is connected to the core board module through USB3.0 and UART, and performs data transmission and control through two interfaces; the 5G module performs data transmission and connection through 1 USB3.

0.

6. The domestic low-power ruggedized tablet terminal based on the RK3588 chip according to claim 1, characterized in that, In the functional module unit, the display screen and touch screen module adopt the 10.8-inch OLED display touch screen module of the E01080015AT series, and the camera module includes: a front camera and a rear camera, both of which are composed of a lens, a sensor, a soft board and an image processing chip. The MIPI0 directly output from the core board is used as the input interface of the front camera, and the light sensing chip enables the front camera to have a light sensing function; the MIPI1 directly output from the core board is used as the input interface of the rear camera, and the LED flash enables the rear camera to support the flash function; the I2C3 directly output from the core board is used to connect the front and rear cameras, and is used for the control function of the camera module; the audio CODEC module uses a low-power stereo audio codec chip, and uses the IIS interface of the RK3588 chip to convert the earphone functions of the left and right speakers, the built-in microphone and the headset through the audio module; the gigabit network module uses the PCIE3.0 X4 directly output from the core board module to mount the WX1860AL4 solution, and expands 3 1000BASE-T network interfaces to the outside.

7. The domestic low-power ruggedized tablet terminal based on the RK3588 chip according to claim 1, characterized in that, In the external interface module, 2 USB interfaces are externally led out by USB_HUB chip expansion; 1 HDMI interface is directly led out by the core board module; 2 RS232 serial ports and 1 RS485 serial port are extended from the TTL serial port directly output from the core board module through the protocol conversion chip expansion; 1000BASE-T network interface is extended and led out by the domestic chip WX1860AL4; the microphone is arranged at the bottom of the tablet to enable the user to input voice in real time, 2 speakers are placed on the left and right sides of the bottom of the tablet, and the headset is also integrated with a headphone interface, which is switched to the headphone interface when it is inconvenient to use the speaker to play; the destroy button is used to destroy the hard disk data, and the signal is directly connected to the hard disk; the control buttons are respectively placed on both sides of the screen for controlling the volume and brightness functions, different buttons are divided by resistors on the carrier board, and the corresponding functions are matched for buttons of different voltages in the program; the indicator light is used to display the hard disk read and write speed, network connection status, tablet power supply status, and battery power status information.

8. The domestic low-power ruggedized tablet terminal based on the RK3588 chip as claimed in claim 1, wherein The tablet terminal has two power supply methods. One is when charging, the adapter's 24V passes through the DC / DC power input isolation and voltage regulation module to supply power to the system and charge the battery at the same time. The other is when not charging, the lithium-ion battery directly supplies power to the system. When the system is charging, the adapter's 24V passes through the DC / DC isolation and voltage regulation module to output a 14V voltage into the charging management chip SC8885. The lithium-ion battery adopts a three-parallel and three-series battery architecture. When it is at full capacity of 6300mAh, the output voltage is 10.8V, which is directly connected to the charging management chip SC8885. When the battery power is insufficient, the charging management chip adjusts the output voltage according to the voltage of the lithium-ion battery, and this voltage is used as the system voltage VCC_SYS to feed into the DC / DC switching power supply module and charge the lithium-ion battery at the same time. When the system is not charging, the lithium-ion battery directly supplies power to the system. The RTC battery supplies power to the clock part in the system to ensure that the clock can run stably when the system is shut down, and the system time of the device is consistent with the real time when the system is powered on again.

9. The domestic low-power ruggedized tablet terminal based on the RK3588 chip as claimed in claim 8, wherein First is the power supply of the core board module. The DC / DC switching power supply module converts VCC_SYS into a 5V voltage and feeds it into the core board. The core board module adopts a single PMIC solution: 1 path of RK806 + 3 paths of RK860. Second is the power supply of each functional module on the carrier board. The DC / DC switching power supply module converts VCC_SYS into 5V and 3.6V to supply power to the Beidou module. The DC / DC switching power supply module converts VCC_SYS into 3.3V to supply power to the WIFI module and converts it into 3.8V to supply power to the 5G module. The DC / DC switching power supply module converts VCC_SYS into 3.3V in the S3 power domain. This voltage supplies power to the network card WX1860 chip, RTC chip, and camera module. At the same time, it is converted again to output 1.8V for the pull-up of the fan and related functions. This part of the power supply ensures that the tablet still exists in the sleep mode and is used to support network communication and RTC-related functions. VCC_SYS is converted into 1.1V in the S3 power domain, and this voltage is used to supply power to another voltage path of the network card WX1860 chip. The DC / DC switching power supply module converts VCC_SYS into 3.3V in the S0 power domain. This voltage supplies power to the solid-state drive, audio chip ES8388, serial port chip, and temperature sensor. At the same time, it is converted again to output 1.8V, 1.8V, and 3.3V, which are used to supply power to the audio module ES8388 and the touch screen / display module respectively. The DC / DC switching power supply module converts VCC_SYS into a 4.2V voltage and connects it to the Nanjin SC6104 chip. This chip simultaneously outputs ELVDD, ELVSS, and AVDD voltages, and the 3 voltages are used to supply power to the touch screen / display module. The tablet terminal adjusts the actual values of the 3 voltages according to the actual usage situation of the touch screen / display module, which is beneficial to the low-power operation of the tablet. The DC / DC switching power supply module converts VCC_SYS into a 5.0V voltage for power supply to the external interfaces such as USB, HDMI, speakers, and fans.

10. The domestic low-power ruggedized tablet terminal based on the RK3588 chip as described in claim 9, characterized in that, The ruggedized tablet terminal adopts a true standby solution. The system is divided into a constant power supply area and a standby power-off area, and the two parts are independently powered; when working normally, both power supply areas work normally, and the standby power-off area is designed for power-off during standby; the ruggedized tablet terminal is designed with three different working states: shutdown, standby, and working. First, the power supply design in the working state: all functional modules are powered by the lithium-ion battery. The CPU and GPU dynamically adjust the frequency and voltage according to the working load state. The RK3588 chip itself supports dynamic frequency modulation and core shutdown, so as to dynamically adjust the power input according to the demand. The actual brightness requirement of the touch screen / display module will change, and the system will regulate the output voltage of the SC6104 power supply chip through the screen brightness adjustment signal; for the camera, Beidou module, WIFI module, audio module, 5G module, and network card, the user can turn off the power voltage of the unused module by pressing a button according to the actual usage requirement. Secondly, the power supply design in the standby state: the power supply in the standby power-off area controls the shutdown of each independent power supply through the GPIO pins of the PMIC chip and the RK3588 chip. At least four groups of power supplies are kept on in the standby state: one is the DDR memory power supply, the second is the GPIO power supply of the RK3588 chip of the processor, the third is the working power supply of the processor PLL, and the fourth is the working power supply of the processor OSC; according to the actual usage requirement, choose whether to keep the power supplies of the network card WX1860 and the WIFI module. Finally, the power supply design in the shutdown state: in the shutdown state of the system, the system clock module can still run; in the shutdown state, it has a data destruction function. The data destruction detection module can run normally in the shutdown state. In an emergency, when the data destruction button is pressed, the system needs to immediately respond and erase the data in the solid-state drive; at the same time, in the shutdown state, the trigger of the user's power-on button is detected. When the user presses the power-on button, the system can start up normally.

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