LQ121S1DC71

Display Modules - LCD, OLED, Graphic

The LQ121S1DC71 is a liquid crystal display (LCD) module designed for industrial applications. As an LCD module, it has the advantage of being a self-contained unit, with a built-in display, backlight, and character generator, allowing it to act as a single solution for monitoring and controlling devices. This article will discuss the application field and working principle of the module.

Application Field

The LQ121S1DC71 offers a number of features for industrial applications. It is highly reliable, with a long operational life and a wide range of temperatures in which it can operate. At the same time, it has a built-in LED backlight, making it suitable for industrial settings where lighting may be limited. Additionally, the LQ121S1DC71 can be used in space-constrained environments, as it takes up only 80x120x14.5 mm of space, making it an ideal choice for smaller systems.

In terms of its functional uses, the LQ121S1DC71 can be used for a variety of applications, including instrumentation, medical monitoring, and industrial control. Its features, such as its reliable performance and limited space requirements, make it a great choice for these applications. Additionally, the LQ121S1DC71 support various communication protocols, including RS232 and I2C, for easy integration into various systems.

Working Principle

In brief, the LQ121S1DC71 uses Liquid Crystal Displays (LCDs) to create images or text on a screen. The LCDs are sandwiched between two polarized glass panels, and each LCD cell contains two polarizing films with a liquid crystal in between them. The electric current passing through the two films will then cause the liquid crystal to rotate and the light passing through it to be twisted, thus creating an image on the screen.

The LCDs will be connected to a set of transistor logic. This logic will determine which LCD is activated and when, thus creating a pattern on the screen. This is referred to as active-matrix addressing, and it is how the module can accurately and quickly create images on the screen. The backlight of the module is also powered by a series of circuits, which use switches and voltage regulators to create a steady and consistent output of light.

Conclusion

The LQ121S1DC71 is an LCD module designed for industrial applications, offering features such as a long operational life and LED backlight. It is capable of supporting various communication protocols, making it simple to integrate into a wide range of systems. Additionally, the module uses active-matrix addressing to create images on the screen, and its backlight is driven by a series of circuits.