An LCD display must be connected to a PCB (printed circuit board) in order to display contents on its screen. The display connector on the LCD determines how that connection is made. Here are the standard connection types for liquid crystal displays:

  1. Elastomer Connector
  2. Pin Connector
  3. Flex Connector
  4. TCP Structure
  5. COG Structure

Elastomer Connector

LCD elastomer connector

Connection method: Mechanical compression
Structure: Alternate laminations of conductive and insulating rubber
Contact pitch: Min. 0.5mm recommended


  • Easily assembled
  • Long service life
  • Suitable for fine pitch


Pin Connector

LCD pin connector

Connection method: Solder
Structure: Plated metal pins
Contact Pitch: 1.5, 1.8, 2.0, 2.54 mm


  • SMT mount possible
  • Suitable small batch production


Flexible (Flex) Connector

LCD flexible connector

Connection method: Heat seal (heat + pressure), solder or mechanical compression
Structure: Base film with electro-conductive traces
Contact Pitch: Heat seal type 0.28mm Min. Solder type 0.8mm Min.


  • Light weight
  • Flexible
  • Thin structure

Tape Carrier Package (TCP) Structure (with driver)

LCD TCP connector

Connection method: Heat and pressure fitting (ACF), soldering.


  • High resolution display
  • Thin structure


Chip on Glass (COG) Structure

LCD COG structure connector

Connection Method: Heat and pressure fitting (ACF), heat seal, FPC, rubber, socket or pin.


  • High resolution display
  • Saves mounting space
  • Thin structure

Date first published: 12 Mar 2013