A hardware architecture circuit design implementation method for a new display device

Abstract

The present invention relates to the field of display technology, and specifically to a method for implementing the hardware architecture circuit design of a new display device. The present invention achieves the effects of higher module flexibility, lower research and development costs, higher structural expandability and more guaranteed security by independently designing a main board, a sub-board and a screen board. The present invention can greatly improve compatibility, expandability and security, thereby enabling this new display device to replace traditional televisions and projectors and improve people's user experience.

Description

Technical Field

[0001] The present invention relates to the field of display technology, in particular to a method for implementing hardware architecture circuit design of a novel display device. Background Art

[0002] With the rapid development of science and technology, product technologies in various fields are rapidly iterating. Among them, large-screen display technologies have been widely used because they are close to people's lives, such as projectors, large-screen TVs, etc.

[0003] In large-screen display technology, the screen is enlarged and zoomed out through optical secondary folding, and the image is formed on a virtual screen 6 meters away, thus realizing a 151-inch large-screen display. This design has the function of protecting eyesight, supporting the installation of applications, and further realizing the functions of reading, watching movies, playing games, etc., and can further connect with other terminal devices for wired and wireless screen projection, realizing the function of an integrated terminal for large-screen display.

[0004] The above multiple integrated functions require the design of a new hardware technology architecture to carry them. Similar solutions in the existing technology have the following shortcomings: First, the power supply design and the mainboard are placed on the same board, and the high-voltage power supply is separated from the low-voltage power supply by ground isolation. This design requires a lot of skills in controlling the PCB layout and routing. If it is not well controlled, it will lead to frequent plate verification, thus reducing R&D efficiency.

[0005] Secondly, MIPI is usually driven directly by the CPU. In this way, since MIPI is at a lower level, it is necessary to adjust various screen parameters such as contrast, sharpness, chroma, saturation, etc. This takes a long time and requires more R&D investment. Under this premise, if the CPU is replaced, the previously adjusted parameters will need to be readjusted, which is not conducive to the derivation and iteration of the product.

[0006] Furthermore, traditional large-screen devices cannot be connected to and compatible with other terminals or devices, so their versatility is slightly insufficient. In addition, in other traditional devices, the sub-board is usually built together with the main board, which limits the expansibility of the sub-board as a functional board. Once the function needs to be expanded, it must be redone together with the main board, which will cost a lot in R&D investment and time cost.

[0007] Based on the above reasons, the present invention designs a hardware architecture circuit design implementation method of a new display device, improves the hardware architecture of existing home large-screen display devices, and can greatly improve compatibility, scalability, and security. Thus, the new display device can replace traditional TVs and projectors and improve people's user experience. Summary of the invention

[0008] The purpose of the present invention is to overcome the shortcomings of the prior art, provide a new display device hardware architecture circuit design implementation method, improve the hardware architecture of existing home large-screen display devices, and greatly improve compatibility, scalability, and security. Thus, our new display device can replace traditional TVs and projectors and improve people's user experience.

[0009] In order to achieve the above-mentioned purpose, the present invention provides a hardware architecture circuit design implementation method of a new display device, including a main board, a sub-board and a screen board that exist independently of each other. The main board includes CPU, PMU, Memory main control core components and serves as a core computing unit to carry an operating system and software applications; the sub-board is used for external expansion functions, including an audio speaker, a keyboard and a USB expansion port; the screen board is used to drive the display of the screen; the main board and the sub-board and the screen board are electrically connected for signal transmission, specifically: The 12V DC power supply in the screen panel is connected to the OVP / OCP through a DC transformer. The OVP / OCP is an overvoltage and overcurrent protector. The OVP / OCP is connected to the power management module PMU in the mainboard through the Load Switch load switch. The power management module PMU converts the voltage to 1.2V, 1.8V and 3.3V respectively and then connects to the CPU on the mainboard. The CPU is connected to the LPDDR4 through the DB interface, the CPU is connected to the TF Card through the SDIO interface, and the CPU is connected to the WiFi or Bluetooth with the antenna ANT through the SDIO interface; the CPU outputs the video signal to the LCM through the HDMI interface, the CPU controls the projection chip through the UART interface to adjust the contrast and color, the CPU enables the projection chip through the GPIO interface, and the projection chip is connected to the LCM through the MIPI to drive the LCM to display in accordance with the effect specifications; the CPU is connected to the left and right channel speakers in the auxiliary board through the power amplifier interface PA, the CPU is connected to the power switch, volume switch and brightness switch in the auxiliary board and then grounded, and the CPU is connected to the USB interface in the auxiliary board.

[0010] Contrast and chromaticity are ready-made parameters that have been adjusted inside the projection chip.

[0011] The USB interface in the sub-board is compatible with UAC, UVC, and OTG protocols.

[0012] The Core end of the CPU is connected to a 1.2V voltage, the IO end of the CPU is connected to a 1.8V voltage, and the Peripheral end of the CPU is connected to a 3.3V voltage.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention outputs HDMI to the screen board through the CPU, and the screen board drives the screen of the MIPI interface. The screen board is made into a standardized module, so that the CPU main board can be modularly replaced. The functional sub-board is designed separately from the main board. When the function needs to be expanded, the functional sub-board can be changed alone without changing the main board; when the main board needs to be replaced, the main board can be replaced alone without changing the sub-board, thereby achieving higher module flexibility and lower R&D cost.

[0014] 2. The main board and the sub-board of the present invention are separated, and the sub-board has strong expandability. The multi-channel separated USB ports and the support of multiple protocols will greatly improve the expandability and achieve a higher structural expandability.

[0015] 3. The present invention separates the 12V power supply circuit from the main CPU circuit, thereby separating the 12V from low-voltage circuits such as 1.2V, 1.8V, 3.3V, and 5V, achieving a safer effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the physical wiring diagram of the hardware circuit board of the present invention.

[0017] Figure 2 This is a block diagram of the hardware circuit architecture of the present invention.

[0018] Figure 3 The figure is a schematic diagram of a specific example of the hardware architecture of an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the CPU modular drive LCM architecture of the present invention. DETAILED DESCRIPTION

[0020] See also Figure 1 to Figure 4 The present invention is now further described in conjunction with the accompanying drawings. The present invention provides a method for implementing a hardware architecture circuit design of a new display device: It includes independent main board, sub-board and screen board.

[0021] The mainboard only contains the core minimum system. When you need to upgrade the computing power, functions, etc. of the mainboard, there is no need to modify the other two boards.

[0022] When the slave board needs to redefine the interface, expand functions, and audio performance, there is no need to modify the other two boards.

[0023] The high voltage system of the power supply is independent of the motherboard. The motherboard only needs to focus on its core functions and does not need to pay attention to the power supply. The power supply is far away from the low voltage 1.2V, 1.8V, 3.3V, and the power supply safety performance is higher.

[0024] The main board includes the CPU, PMU, and Memory master core components and serves as the core computing unit, carrying the operating system and software applications; the sub-board is used for external expansion functions, including audio speakers, keyboards, and USB expansion ports; the screen board is used to drive the screen display.

[0025] The main board, sub-board and screen board are electrically connected for signal transmission, specifically: The 12V DC power supply in the panel is connected to the OVP / OCP through a DC transformer. The OVP / OCP is an overvoltage and overcurrent protector. Since the high-voltage power supply is placed on the panel, safety is increased. The OVP / OCP is connected to the power management module PMU in the mainboard through the Load Switch. The power management module PMU converts the voltage to 1.2V, 1.8V and 3.3V respectively and connects to the CPU on the mainboard, forming a power management circuit that converts 12V to 5V and 5V to 1.2V, 1.8V, and 3.3V.

[0026] The CPU is connected to LPDDR4 through the DB interface, the CPU is connected to the TF Card through the SDIO interface, and the CPU is connected to WiFi or Bluetooth with antenna ANT through the SDIO interface, forming the main control circuit of CPU, LPDDR, TF Card, WIFI / BT, and also adding devices for wirelessly connecting peripherals.

[0027] The CPU outputs the video signal to the LCM through the HDMI interface. The HDMI interface is the standard output port of the CPU motherboard. After all the parameters of the screen board are adjusted, it only needs to perform normal data transmission with HDMI. In this way, when the CPU motherboard is replaced, there is no need to repeat the MIPI debugging work, which maximizes the flexibility and improves the competitiveness of the product accordingly. The CPU controls the projection chip through the UART interface to adjust the contrast and color. The CPU enables the projection chip through the GPIO interface. The projection chip is connected to the LCM through MIPI to drive the LCM to display in accordance with the effect specifications, forming an LCM display circuit.

[0028] The CPU is connected to the left and right channel speakers in the sub-board through the power amplifier interface PA, the CPU is connected to the power switch, volume switch and brightness switch in the sub-board and then grounded, and the CPU is connected to the USB interface in the sub-board to form a sub-board circuit including speakers, keyboards, and USB ports.

[0029] Contrast and chromaticity are ready-made parameters that have been adjusted inside the projection chip, so UART only needs to call simple commands.

[0030] The USB interface in the sub-board is compatible with UAC, UVC, and OTG protocols, enhancing compatibility.

[0031] The Core end of the CPU is connected to a 1.2V voltage, the IO end of the CPU is connected to a 1.8V voltage, and the Peripheral end of the CPU is connected to a 3.3V voltage.

[0032] The above are only preferred embodiments of the present invention, which are only used to help understand the method and core ideas of the present application. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

[0033] The present invention solves the problem of frequent plate making and verification caused by the confusion of various boards of large-screen display devices in the prior art, thereby reducing R&D efficiency, causing large R&D investment, being unfavorable for iteration and derivation, and being unfavorable for the expansion of functional boards, which further leads to increased R&D investment and time costs. By designing the main board, sub-board and screen board independently, the module is more flexible, the R&D cost is lower, the structural expandability is higher and the security is more guaranteed.

Claims

1. A method for implementing a hardware architecture circuit design of a new display device, characterized in that: It includes a main board, a sub-board and a screen board that exist independently. The main board includes CPU, PMU, Memory main control core components and serves as a core computing unit to carry the operating system and software applications; the sub-board is used for external expansion functions, including audio speakers, keyboards and USB expansion ports; the screen board is used to drive the display of the screen; the main board and the sub-board and the screen board are electrically connected for signal transmission, specifically: The 12V DC power supply in the screen panel is connected to the OVP / OCP through a DC transformer. The OVP / OCP is an overvoltage and overcurrent protector. The OVP / OCP is connected to the power management module PMU in the main board through the Load Switch load switch. The power management module PMU converts the voltage to 1.2V, 1.8V and 3.3V respectively and then connects to the CPU on the main board. The CPU is connected to LPDDR4 through the DB interface, the CPU is connected to the TF Card through the SDIO interface, and the CPU is connected to the WiFi or Bluetooth with the antenna ANT through the SDIO interface; the CPU outputs the video signal to the LCM through the HDMI interface, the CPU controls the projection chip through the UART interface to adjust the contrast and chromaticity, the CPU enables the projection chip through the GPIO interface, and the projection chip is connected to the LCM through MIPI to drive the LCM to display in accordance with the effect specifications; the CPU is connected to the left and right channel speakers in the auxiliary board through the power amplifier interface PA, the CPU is connected to the power switch, volume switch and brightness switch in the auxiliary board and then grounded, and the CPU is connected to the USB interface in the auxiliary board.

2. The method for implementing the hardware architecture circuit design of the new display device according to claim 1, characterized in that: The contrast and the chromaticity are ready-made parameters that have been adjusted inside the projection chip.

3. The method for implementing the hardware architecture circuit design of the new display device according to claim 1, characterized in that: The USB interface in the sub-board is compatible with UAC, UVC, and OTG protocols.

4. The method for implementing the hardware architecture circuit design of the new display device according to claim 1, characterized in that: The Core end of the CPU is connected to the 1.2V voltage, the IO end of the CPU is connected to the 1.8V voltage, and the Peripheral end of the CPU is connected to the 3.3V voltage.

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