Ing. Davide Terrenghi Projected Capacitive Input.

Size: px

Start display at page:

Download "Ing. Davide Terrenghi Projected Capacitive Input. www.amtouch.com.tw"

Mark Mathews
8 years ago
Views:

1 Ing. Davide Terrenghi Projected Capacitive Input

2 AMT Provides TOTAL SOLUTIONS - Sensor design - Control solution - Software design support - Integration Guide Support

3 Top View Struttura PCI control board X 1 X 2 X Y Each layer define one axis (X or Y) Cover Glass (Decor Glass) Top Film Bottom Film Conductive layer (EMI shielding) The conductive pads are designed by diamond shape Using two layers of conductive material by lamination Y 1 Y 2 Y 3 Y 4 Y 5

layer (EMI shielding) The conductive pads are designed by diamond shape

4 Principio di Funzionamento PCI Design Guide Because human body is a conductor, when a human finger approaches an electrode of Projected Capacitive Input (PCI) touch screen, the capacitance between that finger and the electrode will be changed, which makes it possible for controller to locate the touch position by finding out which line has capacitance change. Theoretically the operation force for projected capacitive touch screen is zero because the changes of capacitance can be detected when a conductor close enough to its surface. In addition, the surface material for PCI touch screens is glass, which is highly scratch-resistant, durable, and reliable under harsh environment. Since the capacitance will not change when an insulator approaches a PCI touch screen, this means that one can not activate projected capacitive touch with non-conducting object. The operation theory of a PCI touch screen is that, under the cover glass substrate, there are two patterned ITO layers which create X-axis and Y-axis electric field. These electric fields will project above the glass surface between adjacent ITO traces. Once a finger approaches the glass surface, a new balance of electric field will be established between the finger and the corresponding X-axis and Y-axis. The controller IC will locate the ITO traces which have capacitance changes to pinpoint the finger touch accurately.

Theoretically the operation force for projected capacitive touch screen is zero because the changes of capacitance can be detected when a conductor close enough to its surface.

5 Definizione dei Patterns in base al Chip (Microchip) Diamond Pitch:5~7mm Y2 Y1 (Y-Axis) (X-Axis) X1 X2 X3 Note: X- and Y-patterns are on different layers.

6 Construction F/F/F

7 3D View Struttura: Cover-Lens /Film/Film/Film PCI Touch Sensor Sensor (F-F-F) + Adhesive = 0.65mm Top Glass/Decor Glass Glass / PMMA / PC 0,7/1,1/2,8 mm Film Film OCA Optical adesive ITO Film ITO Patterns OCA Optical adesive ITO Patterns ITO Film OCA Optical adesive ITO Film EMI shield LCD Display

65mm Top Glass/Decor Glass Glass / PMMA / PC 0,7/1,1/2,8 mm Film Film OCA

8 Tail Design PCI Design Guide

9 FPC Design Sensor edge Tail Length no more than 50mm (Suggested) Standard AMT EMI Shielding Tape on Double Side COF Design No less than 15mm Bending Area Sensor edge Components Area A richiesta MOQ

10 Cover Lens/ Décor Glass Design

11 Cover Lens Features -Glass : Normal or chemically strengthened Thickness: 0.7/1.1/1.8/2.8mm Surface treatment: Clear/ Anti Glare + AR Color printing (Pantone / RAL) - PMMA & PC : Thickness: 1.0mm (other thickness in development) Note: for sensors under 10.4

12 Integration PCI Design Guide

13 Cover Lens can be designed by customer The design can be dome with rectangular corner or round corner Printed Cover Lens Decor TOP Film Full Transparent Cover Lens

14 Front Bezel & Gasket Design Cover Lens & Gasket Design (es. I-Phone)

15 3.5.6 PCI Design Guide Integration example Studiare tipo di integrazione durante lo sviluppo del prodotto X,Y,Z e componenti BOM Attenzione ai case metallici, mantenere le giuste distanze per evitare noise

prodotto X,Y,Z e componenti BOM Attenzione ai case

16 Optical Light Transmission: > 88% Haze: < 3% based on clear surface < 12% if AG type Mechanical Size: 2.8 to 10,4 diagonal size (12 end of may-15 ) Sensor Thickness: 0.95mm ~ 3.35mm and other options Glass Hardness: > 7H for AG type, Mohs 5 for clear type Tail design: FPC type Activation force: forceless Environmental Operating Temperature: -20 to +70 Storage Temperature: -40 to +80 Humidity: 90% RH at 40, non condensing Electrical Technology: Projected Capacitive Resolution: 1024 Reliability Touch Life: unlimited Chemical, Abrasion and Liquid Resistance: touch function not affected Calibration No Need

35mm and other options Glass Hardness: > 7H for AG type, Mohs 5 for clear type Tail design: FPC type Activation force: forceless Environmental Operating

17 SIZE PCI + Controller Board STANDARD SENSOR Design

18 SIZE PCI + Controller Board PenMount Control Board support multiple sizes PM1100 RS-232, I2C PM1200 USB/RS-232, I2C PM1300 USB, I2C Win7 Win Vista Win XP Android 2.2 Control Board Sensor Size Supported Interface Operating System Number of Touch same Time PM "~4.9" RS-232, I 2 C Win 7, Vista, XP 2 PM1200 5"~7.9" USB, RS-232, Win 7, Vista, XP, Android 2 I 2 C 2.2 PM1300 8"~10.9" USB, I 2 C Win 7, Vista, XP 2 With Gesture support other Driver under request

2 Control Board Sensor Size Supported Interface Operating System Number of Touch same Time PM1100 3.5"~4.

19 Supporto x New Firmware Update / Gesture 2 tocchi PenMount Utilities support FW Field update PCIMset Parameter adjustment

20 Custom Solution using Resistive Touch Technology Alta Durabilità Touch RESISTIVI Frameless HD Film 9H Framed Touch Touch Window For Stylus input, anti-scratch application Top HD film Easy to change the exist model with HD film. Light Touch Force with finger or stylus input Surface hardness : 9H Clear or AG surface finish 4-, 5- and 8-wire design Size from 3.8 to 10.9 Grafic Overlay

21 Thanks a lot PCI Design Guide

easytouch Projected capacitive touch for industrial applications Version: July 2013

easytouch Projected capacitive touch for industrial applications Version: July 2013 WHAT IS easytouch is a projected capacitive touch (PCAP/PCT) solution, developed and manufactured by DATA MODUL easytouch