The advantages and disadvantages of the various touch technology Character LCD Modules

Infrared formula: using infrared matrix composed of rows and columns of the scanning line position can determine when an object blocking the light source.
This is commonly known as photo-interrupter switch, this technology is often seen in the film, used for preservation detection, and its wide range of applications, such as printer print head positioning, wheel mouse wheel, are to use the photo interrupter determination, the drawback is true resolution is not high, vulnerable to light impact, the reaction rate is slower, but can sense objects of any light obscuration.graphic lcd display module
The determination around there must be a pair of transmitter and receiver.
Infrared development is not interrupted, but after launching off objects in the reflection mode, somewhat similar to the radar gun this way can be simulated to achieve the multi-point, but there are still shielding problems, and transmitting and receiving component costs The increased provisioning intensive (increase the resolution) the relevant costs will be higher.
2 Resistance: let the two conductive layers through pressure contact, and then calculates the position of the object via the impedance value of the difference.
The early part of this technology is used in small tablet or touch panel membrane keyboard / waterproof keyboard, as well as the early analog joystick, is the use of the potential difference generated by the resistance, and now this technology is extensive use of mobile phones or small size of the touch screen above, its benefits can be enough to put pressure on the object as the hand with a pen to operate, accuracy will be subject to temperature and humidity of the impact of changes in impedance value change.COG LCD Module
Determination must have a pressure of touch, so there will be quite a stretch feeling, and the surface is soft material.
Due to the different process was divided into four-wire, five-wire, eight-wire.