ST STVM100DC6F

КалибраторВидеодисплей

Overview

The STVM100DC6F is a programmable VCOM adjustment solution for thin-film transistor (TFT) liquid-crystal displays (LCDs) to remove “flickers”. It is also used in e-paper and e-book applications to avoid the “ghosting” effect (residual pixels after display refresh). It can replace a mechanical potentiometer, so that the factory operator can physically view the front screen when performing the VCOM adjustment. This significantly reduces labor costs, increases reliability, and enables automation.

The STVM100DC6F provides a digital I2C interface to control the sink current output (IOUT). This output drives an external resistive voltage divider, which can then be applied to an external VCOMbuffer. Three external resistors R1, R2, and RSET determine the highest and lowest value of the VCOM. An increase in the output sink current will lower the voltage on the external divider so that the VCOMcan be adjusted by 128 steps within this range. Once the desired VCOMsetting is achieved, it can be stored in the internal EEPROM that will be automatically recalled during each power-up. The STVM100DC6F is available in an 8-pin, 3 mm x 3 mm TDFN8 or 3 mm x 3 mm TSSOP8 package.

Features