Test method and test system for implementing COMMAND-mode MIPI (mobile industry processor interface) modules

Abstract

The invention discloses a test method and a test system for implementing COMMAND-mode MIPI (mobile industry processor interface) modules and used for configuration testing of the COMMAND-mode MIPI modules before delivery. The test method mainly includes the steps that a PG (program guidance) image generator sets register configuration parameters and image data according to types of the COMMAND-mode MIPI modules, transmits the register configuration parameters to an MCU (microprogrammed control unit), and transmits the image data to an FPGA (field programmable gate array) through an LVDS (low voltage differential signaling) data bus interface; the MCU generates DCS (data communication system) instructions according to the register configuration parameters and transmits the DCS instructions to the FPGA; the FPGA receives image data signals through the LVDS data bus interface and has the DCS instructions and the image data packaged and transmitted to a bridge chip; the bridge chip transmits the DCS instructions for configuration of the MIPI modules and converts the image data to the MIPI signals which are transmitted to the MIPI modules, and the MIPI modules display the image data according to the MIPI signals to complete testing.

Description

technical field [0001] The invention belongs to the display field and testing technical field of liquid crystal modules, and specifically refers to a MIPI module testing method and testing system for realizing COMMAND mode. Background technique [0002] Display screens with MIPI interfaces are widely used in modern electronic devices such as smart phones and tablets. In the large-scale production process of MIPI display modules, the configuration test of MIPI modules before leaving the factory is a very important link. It is necessary to use the technology of reading and setting the internal registers of MIPI modules to complete the point screen test and Vcom adjustment. , MTP burning and other production processes. In VIDEO mode or COMMAND mode, the bridge chip sends the input signal to the MIPI module display in VIDEO mode or COMMAND mode through the internal conversion mechanism. VIDEO mode refers to the mode in which the host transmits to the LCD module using real-time...

AI Technical Summary

Problems solved by technology

[0003] At this stage, the MIPI module test system is only applicable to MIPI modules in VIDEO mode. The solution for configuring the bridge chip is to use two independent channels of SPI channel and RGB data channel to transmit parameter configuration data and image data respectively. However, the bridge chip works In COMMAND mode, the SPI interface used to transmit configuration parameters is closed, so the current MIPI module test system cannot perform point-screen testing of MIPI modules in COMMAND mode

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