Flexible easy-to-expand liquid crystal screen testing platform

Abstract

The invention relates to a flexible easy-to-expand liquid crystal screen testing platform. The testing platform comprises a core control module, an eMMC module, a display output interface, an LCD power module, an external interface module, an external MCU module and an IO expansion and HMI interface; the core control module is the core of the whole system, controls all functions of the system and is composed of a CPU, a GPU and a DDR memory; the eMMC module is used for storing application programs and picture data; the display output interface comprises an RGB / LVDS output interface module and a display interface expansion module; the LCD power module is an expansion module; the external interface module comprises an Ethernet interface module, an SD card interface module, a USB interface module and a serial port module; an HMI interface module provides a human-computer interaction interface, and a user can set and monitor the system without using a PC. The platform is not a solution only for a display screen, but a universal testing platform, and the platform can support the needs of different customers and has high expandability.

Description

technical field [0001] The invention relates to a flexible and easily expandable liquid crystal screen test platform, which belongs to the technical field of liquid crystal test. Background technique [0002] The basic composition of a general liquid crystal test system includes a nuclear control module, an external interface module (Ethernet, SD card, serial port, etc.), a display output module, a liquid crystal display power supply module, IO expansion and key control, etc., and its main function is to light up The liquid crystal display screen reaches a certain refresh rate, tests the color, brightness and flicker of the liquid crystal display, adjusts the parameters to achieve the best display effect, and finally completes the initialization settings of the liquid crystal display. [0003] With the increase of display interface types and the demand for high resolution (4Kx2K), the traditional test system faces the following problems: (1) poor scalability, usually a test ...

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Problems solved by technology

[0003] With the increase of display interface types and the demand for high resolution (4Kx2K), the traditional test system faces the following problems: (1) poor scalability, usually a test system can only support one display interface, such as RGB or MIPI Interfaces, etc., cannot support multiple interfaces at the same time; (2) The resolution supported is limited, some devices cannot support 4K resolution, and some devices only support high resolution; (3) The power-on loading speed is slow, and many devices are powered on Finally, the application program needs to be loaded from NandFlash or SD, and the speed is not high, so the time from power-on to displaying pictures is very long; (4) There is no open external programming interface, and it is difficult for users to carry out secondary development based on this system; (5) ) lacks an automated upgrade process, most of which are based on SD cards to complete the upgrade of system functions and pictures, but the rate is very slow and lacks an automated process

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