使用觸摸傳感器的設備的輸入和控制，第2部分：控制器和開發包

　　在本系列觸摸感知的第1部分中，我們研究了各種類型的觸摸傳感器技術。在第2部分中，我們將探討觸摸感知系統的創建要素，并考慮一些控制器和開發工具包，這些功能使工程師能夠創建流線型、吸引人和可靠的基于觸摸的產品設計。

　　當創建觸摸顯示屏時，各種組件必須包括傳感器、氧化錫薄膜和其他透明導體材料、觸摸控制器IC、覆蓋透鏡玻璃、LCD和OLED顯示模塊，等等。

　　技術進步可以在覆蓋層厚度、互連、投射電容和形狀因子中看到。今天的電容式傳感器設計需要3毫米或更少的疊加，與以前較厚的解決方案相比，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.