An LCD controller or LCD Display driver or an LCD Driver is an integrated circuit that offers an interface between the LCDs and the Microcontroller (MCU) or Microprocessor (MPU) system. Generally, a standard parallel or serial electronic interface is used for connection with MCU or MPU. LCD Drivers can be discrete chips executed in standard semiconductor chip bundles, with enormous I/O interconnects to a different LCD glass through gadgets like bonded flexible looms or elastomeric connectors. To beat the extremely high I/O interconnection necessities of the controller to the glass, the controller chip can be bonded straightforwardly to the glass, with the serial interface and power supply being the main I/O associations.
The above figure is that of an LCD circuit.
Display drives drive a matrix of liquid crystal segments or dots. The enormous number of spots broadens the achievable number of ports that can be associated with the chip. To beat this exceptional technique for driving, a dot matrix grid is implemented. This is accomplished by implementing the LCD as a cluster, or network of lines and sections, and driving the lines and segments by exceptional waveform shapes. The signal pattern on the LCD Controller ports is defined already to empower driving without contention and work in order to not harm the LCD.
LCD Drivers / Controller also consists of characters stored in a different language to enable driving the display efficient. They also come with programmable shape memory such that they can offer user-defined characters. The manufacturer of the driver/controller will generally offer a generic software driver to provide interfacing with the device. They usually provide regulation of voltage for changing the port waveform amplitude, managing the contrast and adapt to several ambient temperatures. They also come with the inbuilt functionality to manage backlighting.
Though a short one but this was all we have regarding LCD drivers. Hope you liked going through it. Brands that manufacture them are Texas Instruments, NXP and Maxim. Make sure to follow them using the links as provided.
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