The capacitance TFT Display Module screen technology axis interleaved

Axis staggered (also known as Profile-based) technology, the conductive layer on the diamond-shaped sensing unit planning, 1 layer each axial conductive layer. 2-axis type, for example, the detection of the touch sensing controller respectively scan horizontal / vertical axis, resulting in the capacitive coupling of the horizontal / vertical sensing point rise crest (peak), and 2-axis at the intersection of that the right touch points. As each measurement for the use of a single conductive layer and touch objects capacitive coupling phenomenon, so in the case of the self-capacitance technology.OLED Display Module
Axis interleaved capacitive touch technology, in fact notebook touch pad (touch pad) implementation technology, technology is quite mature, but the Touch Pad and Touch screen maximum difference is that the former is opaque, which is transparent the. Opaque, the touchpad can be used in the sensing area electrode metal or carbon atoms. Projected capacitive touch screen is transparent, required as a conductive transparent ITO electrode, and this layer ITO unlike resistive or surface capacitive uniform conductive layer, and design style.
Single-touch applications, the axis staggered to get the exact touch position, so unlike surface capacitive subject to calibration correction. Through
Some algorithms, the axis staggered can do multi-touch gesture recognition function, but to locate the multi-touch correct position will be
Difficult. 2-axis scanning, the two touch points, respectively, in the X-axis and Y-axis each produce two peaks, the intersection on the four contacts, two points pseudo touch points (Ghost Point) This will cause the system can not be correctly interpreted.lcd graphic display
However, there are still ways to solve the multi-point positioning. 2-axis touch screen, you can use two fingers touch the time difference to distinguish the front / rear contact, or to identify the direction of movement of the contacts. Also, the capacity of the the axial increase can identify the contact position, the number for each additional 1 axially of identification (e.g., 3-axis recognizable 2 points, 4 of shaft 3); However, each increase of one axial , it is necessary to multi-layer conductive layer, which increases the thickness, weight and cost of the design of the touch panel, this is not the portable would like to see the results.