8.0 Inch TFT LCD Display With LVDS Interface From China Manufacturer Now Available!
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LCD and CTP Interface Introduction-Serial Interface
March 03, 2024
3033
China LCD TFT Display Manufacturer, Global Supplier
HOTHMI's recent R&D achievements, technological breakthroughs and developments
March 03, 2024
3033
Fig. 1 Connection Between MCU to LCD
LCD can’t be driven with DC (Direct Current), it has to be driven with AC (Alternative Current) and the overall current has to be ZERO. Otherwise, the Liquid Crystal Material will be damaged sooner or later.
Fig. 2 LCD Driving Waveform
There are two types of Driver IC’s, Common Drivers and Segment Drivers. Common Drivers output signals to create the rows or numbers of lines. The Segment Drivers output the necessary signals to create the characters or columns.
The Controller IC receives data written in ASCII or JIS code from the MPU and stores this data in RAM. This data is then converted into serial character patterns and transferred to the LCD driver IC.
Drive/Controller IC is probably the most commonly found in a graphics module. This IC receives data from the MPU and stores it in RAM. Also, it accepts commands directly from the MPU for both the common and segment drivers.
Serial Interface include: I2C, SPI, RS232
PROs: less connection, hardware lower cost
CONs: Software is more complicated
China LCD TFT Display Manufacturer, Global Supplier