Testing method for MIPI liquid crystal screen

Abstract

The invention discloses a testing method for an MIPI (mobile industry processor interface) liquid crystal screen. The method comprises the following steps of: (1) providing a test tool; (2) electrically connecting the to-be-tested liquid crystal screen with a backlight source driver module and an MIPI module; (3) powering on the test tool; (4 ) giving alarm if an abnormity is detected by a microprocessor, and performing initialization on the backlight source driver module, a liquid crystal driver module and a signal conversion module if no abnormity is detected by the microprocessor; (5) driving the backlight source of the to-be-tested liquid crystal screen to work by the backlight source driver module under the control of the microprocessor; (6) converting an RGB signal transmitted from the microprocessor into an MIPI signal by the signal conversion module and transmitting the MIPI signal to the to-be-tested liquid crystal screen, and enabling the to-be-tested liquid crystal screen to display the corresponding image according to the MIPI signal; and (7) judging whether the image is normal or not, determining that the to-be-tested liquid crystal screen is qualified if the image is normal, and otherwise determining that the to-be-tested liquid crystal screen is unqualified.

Description

technical field [0001] The invention relates to a method for testing a liquid crystal screen, in particular to a method for testing a liquid crystal screen with an MIPI interface. Background technique [0002] Liquid crystal display is a flat and ultra-thin display device, which is composed of a certain number of color or black and white pixels, placed in front of the light source or reflective surface. Liquid crystal displays are favored by engineers for their thinness, low power consumption, and wide application. [0003] The most commonly used connection modes for existing small and medium-sized LCD screens are generally MCU mode and RGB mode. The MCU mode is easy to control and does not require clock and synchronization signals, but it consumes GRAM and is difficult to achieve a large screen. It is often used to display still images; RGB mode does not require GRAM, and the transmission speed is faster, but the operation is complicated, requiring clock and synchronizatio...

AI Technical Summary

Problems solved by technology

[0003] The most commonly used connection modes for existing small and medium-sized LCD screens are generally MCU mode and RGB mode. The MCU mode is easy to control and does not require clock and synchronization signals, but it consumes GRAM and is difficult to achieve a large screen. It is often used to display still images; RGB mode does not require GRAM, and the transmission speed is faster, but the operation is complicated, requiring clock and synchronization signal control, often used to display video or animation

However, both of these two modes use FPGA circuit design. FPGA editing ability is poor, and complex designs cannot be completed. Moreover, FPGA circuits are complex, consume high energy, and signal transmission speed is slow, and they are also susceptible to interference.

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