Method and device for recognizing liquid crystal display screen and terminal

Abstract

The invention discloses a method and a device for recognizing a liquid crystal display screen and a terminal, which can be automatically compatible with a plurality of liquid crystal display screens. The device comprises a storage module, a voltage regulating module and a recognition module, wherein the storage module is used for storing the driving chip parameter of the liquid crystal display screen; the voltage regulating module is used for regulating an output voltage of the liquid crystal display screen to the processing range of the recognition module according to a fixed voltage when connected to the liquid crystal display screen so as to obtain a regulating voltage; and the recognition module is used for storing the corresponding relation between the driving chip parameter and the regulating voltage of a corresponding type of liquid crystal display screen, receiving the regulating voltage of the voltage regulating module, and searching the driving chip parameter corresponding to the regulating voltage according to the regulating voltage and a preset corresponding relation.

Description

technical field [0001] The invention relates to the field of embedded mobile terminals, in particular to a method, device and terminal for identifying liquid crystal display screens. Background technique [0002] With the continuous development of science and technology, more and more embedded products are used in our daily life. They are popular for their small size and convenient use, and LCD screens are indispensable in many embedded products. It is part of people's most intuitive impression of this terminal product. The working principle of the LCD screen is that when the terminal system is turned on, the microprocessor first writes the working parameters corresponding to the internal driver chip of the LCD screen into the driver chip, and completes the initialization of the driver chip, so as to ensure that the LCD screen normal work. [0003] However, as the demand for terminal products continues to increase, the market for liquid crystal display screens is also incr...

AI Technical Summary

Problems solved by technology

At this stage, the LCD screens of the terminal products we see all use the corresponding fixed models. If the screen is accidentally damaged, it must be replaced by the same manufacturer, and the same type of display screen can be used. Although some terminal products It has also been compatible with two different types of LCD screens, such as the attached figure 1 As shown, the level of a GPIO (general-purpose input / output) pin (the identification pin of the LCD screen is connected to the power supply or ground) can be used to judge which type of LCD screen is used, but this method also has certain limitations. Because the update speed of the electronic market can be described as changing with each passing day, after a few years, perhaps the production of these two LCD screens has long been discontinued, so users have to replace new terminal products, which not only affects the use of users, but also affects the user experience. a waste of resources

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