使用触摸传感器的设备的输入和控制，第2部分：控制器和开发包

　　使用触摸传感器的设备的输入和控制，第2部分：控制器和开发包

　　在本系列触摸感知的第1部分中，我们研究了各种类型的触摸传感器技术。在第2部分中，我们将探讨触摸感知系统的创建要素，并考虑一些控制器和开发工具包，这些功能使工程师能够创建流线型、吸引人和可靠的基于触摸的产品设计。

　　当创建触摸显示屏时，各种组件必须包括传感器、氧化锡薄膜和其他透明导体材料、触摸控制器IC、覆盖透镜玻璃、LCD和OLED显示模块，等等。

　　技术进步可以在覆盖层厚度、互连、投射电容和形状因子中看到。今天的电容式传感器设计需要3毫米或更少的叠加，与以前较厚的解决方案相比，增加了更高的精度。

　　Touch has been integrated into LCD modules， too. Indium-tin oxide （ITO）， the conductor used in touch displays， allows the capacitive sensor to be up to 90 percent transparent for one-layer designs. Projected capacitive touch （PCT） is now more attractive based on the accuracy and flexibility gained by etching the conductive layer， replacing earlier sensor-in-pixel solutions.

　　In touch and LCD integration the “cell” is the area between the color filter glass and TFT glass. When the touch transmitter and receiver are located below the top of the color filter glass， the integrated LCD/touch system is referred to as an “in cell solution.” This integration can eliminate redundant structures creating a slimmer display. “Glass-on-glass” touchscreen technology is also known as “on cell，” meaning both touch transmitter and receiver are on top of the color filter glass.