A drive board of 3.5-inch liquid crystal screen with HDMI interface

Abstract

The utility model provides a drive board of 3.5 inch liquid crystal screen with HDMI interface relates to the field of liquid crystal screen drive board. The HDMI conversion RGB module adopts RTD2660H chip, is used for converting HDMI input signal into RGB+TCON signal. The drive board of 3.5 inch liquid crystal screen with HDMI interface, one, expansion interface type: through the integration HDMI interface, has solved the limitation that only VGA and CVBS input are supported in existing PVI035VX2 drive board, can directly receive high -definition digital signal, two, improve display performance: adopt RTD2660H chip to realize signal conversion, has reduced the signal loss of external conversion equipment, guarantees display quality, three, strong speciality: specially designed for PVI035VX2 screen, through FLASH circuit preset adaptation parameter, need not additional debugging can stable work, four, structure optimization: the size structure of independent design is more adapted to the actual application scene, is convenient for installation integration, five, good compatibility: supports HDMI1.1 standard and LVDS signal, can adapt to a variety of high -definition signal source.

Description

Technical Field

[0001] This utility model relates to the field of LCD screen driver board technology, specifically a driver board for a 3.5-inch LCD screen with an HDMI interface. Background Technology

[0002] The PVI035VX2 model is a 3.5-inch LCD screen widely used in various small display devices. Currently, driver boards for this screen model generally suffer from a limited interface type, supporting only traditional analog signal inputs such as VGA and CVBS, and cannot directly receive high-definition digital signals such as HDMI.

[0003] With the increasing demand for high-definition displays, existing driver boards are no longer sufficient to meet the signal input requirements of modern devices. Users requiring HDMI signal sources must equip themselves with additional signal conversion devices, which not only increases device size and cost but may also lead to signal loss, display latency, and other issues, impacting overall display quality and user experience. Therefore, there is an urgent need for a driver control board with an integrated HDMI interface, specifically designed for the PVI035VX2 screen. Summary of the Invention

[0004] The purpose of this invention is to provide a driver board for a 3.5-inch LCD screen with an HDMI interface, which solves the problems mentioned in the background art.

[0005] Technical solution

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a driver board for a 3.5-inch LCD screen with an HDMI interface, including an HDMI to RGB module, wherein the HDMI to RGB module uses an RTD2660H chip to convert the HDMI input signal into an RGB+TCON signal.

[0007] The power supply circuit provides operating power to each module.

[0008] The TCON circuit is connected to the HDMI to RGB converter module and is used to drive the PVI035VX2 LCD screen.

[0009] The FLASH circuit is connected to the HDMI to RGB module and is used to store configuration programs and resolution parameters.

[0010] The backlight driving circuit is used to provide backlight power for the PVI035VX2 LCD screen.

[0011] Furthermore, the HDMI to RGB module receives external HDMI signals, converts them, and then drives the PVI035VX2 LCD screen for display via the TCON circuit.

[0012] Furthermore, the RTD2660H chip is in an LQFP128 package and supports HDMI 1.1 standard input.

[0013] Furthermore, the external dimensions and structure of the drive control board are designed and manufactured independently.

[0014] Furthermore, the FLASH circuit stores 640*480 resolution parameters adapted to the PVI035VX2 LCD screen.

[0015] This invention provides a driver board for a 3.5-inch LCD screen with an HDMI interface. It offers the following advantages: This driver board for a 3.5-inch LCD screen with an HDMI interface offers the following advantages: 1. Expanded Interface Types: By integrating an HDMI interface, it overcomes the limitation of existing PVI035VX2 driver boards that only support VGA and CVBS inputs, allowing direct reception of high-definition digital signals. 2. Enhanced Display Performance: Utilizing the RTD2660H chip for signal conversion reduces signal loss from external conversion devices, ensuring display quality. 3. High Dedicated Design: Specifically designed for the PVI035VX2 screen, it uses preset adaptation parameters in the FLASH circuit, enabling stable operation without additional debugging. 4. Optimized Structure: Its independently designed shape and size structure are better suited to actual application scenarios, facilitating installation and integration. 5. Good Compatibility: Supports HDMI 1.1 standards and LVDS signals, adapting to various high-definition signal sources. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] like Figure 1 As shown, this utility model embodiment provides a driver board for a 3.5-inch LCD screen with an HDMI interface, including an HDMI to RGB module: the core chip adopts RTD2660H (LQFP128 package), which has a built-in HDMI receiver and signal conversion circuit, supports the HDMI1.2 input standard, and can receive HDMI signals output by devices such as PCs and convert them into RGB parallel signals and TCON control signals; Power supply circuit: A DC-DC converter chip is used to convert the input 12V DC power supply into different voltage levels such as 3.3V and 5V, which provide working power for the RTD2660H chip, TCON circuit and other components. TCON circuit: Composed of timing control chip and peripheral circuit, it receives RGB+TCON signal output by RTD2660H, generates driving timing signal suitable for PVI035VX2 screen, and controls the display of screen pixels. FLASH circuit: It adopts an 8MB SPIFLASH chip to store the firmware program of RTD2660H, resolution parameters such as 640*480 adapted to the PVI035VX2 screen and color calibration data. Backlight driving circuit: It adopts an LED driver chip to provide a stable current output for the backlight LED of the PVI035VX2 screen and supports brightness adjustment. The size of the driver control board is designed according to the actual application equipment space. It adopts a 4-layer PCB board structure to ensure signal transmission stability.

[0022] Working principle: When the driver board is connected to a 12V power supply and the host's HDMI interface, the power circuit starts working, supplying power to each module; the RTD2660H chip reads the configuration information from the FLASH circuit and initializes it, sending the supported resolution information (which includes 640x480 by default) to the host; the host outputs a 640x480 resolution HDMI signal based on this information; after receiving the HDMI signal, the RTD2660H chip performs decoding and format conversion processing to generate a 640*480 resolution RGB signal and the corresponding TCON control signal; the TCON circuit performs timing matching processing on the RGB+TCON signal to drive the PVI035VX2 screen to display the image; at the same time, the backlight driver circuit starts, providing backlight to the screen, completing the entire display process.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A driver board for a 3.5-inch LCD screen with an HDMI interface, comprising an HDMI to RGB converter module, characterized in that: The HDMI to RGB module uses an RTD2660H chip to convert HDMI input signals into RGB+TCON signals. The power supply circuit provides operating power to each module. The TCON circuit is connected to the HDMI to RGB module and is used to drive the PVI035VX2 LCD screen; The FLASH circuit is connected to the HDMI to RGB module and is used to store configuration programs and resolution parameters; The backlight driving circuit is used to provide backlight power for the PVI035VX2 LCD screen.

2. The driver board for a 3.5-inch LCD screen with an HDMI interface according to claim 1, characterized in that: The HDMI to RGB module receives external HDMI signals, converts them, and then drives the PVI035VX2 LCD screen for display via the TCON circuit.

3. The driver board for a 3.5-inch LCD screen with an HDMI interface according to claim 1, characterized in that: The RTD2660H chip is packaged in an LQFP128 package and supports HDMI 1.1 standard input.

4. The driver board for a 3.5-inch LCD screen with an HDMI interface according to claim 1, characterized in that: The external dimensions and structure of the drive board were designed and manufactured independently.

5. The driver board for a 3.5-inch LCD screen with an HDMI interface according to claim 1, characterized in that: The FLASH circuit stores 640*480 resolution parameters adapted to the PVI035VX2 LCD screen.

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