Wacom Digitizer Implementation Guide Component Business Division Wacom Co., Ltd. 1 • 30.10.
Contents Principle of Wacom EMR 2. General Specification 3. Structure 4. Digitizer Lineup 5. Display Lineup 6. Customizing Digitizer 7. System Designing (EM noise) 8. System Designing2 (metal parts) 9. System Calibration 10. Driver 1. 2 • 30.10.
1. Principle of Wacom EMR Receiving g and transmitting g coil in stylus y Y axis Pen Antenna coil X axis Sensor Board Coil switching V transmit/receive High frequency source Receiver Signal strength 3 • 30.10.
2. General Specification W Wacom Digitizer Di iti Unit U it Technology EMR (Electro-Magnetic Resonance) Active Area 263.12 * 165.2 mm for SU5E-12W16AS-00X Resolution 0.01mm (2540 ppi) Coordinate Accuracy ±0 4mm (see Note 1 and 2) ±0.
3-1. Structure EMR digitizer be inserted under the LCD 5 • 30.10.
3-2. Structure EMR digitizer be inserted under the LCD 6 • 30.10.
4-1. Digitizer Lineup Sensor : G4 ･･･ glass epoxy sensor G4.5 ･･･ glass epoxy sensor G5 ･･･ PET film or FPC (Polyimide) G4/G4.5 7 • 30.10.
4-2. Digitizer Lineup G5 sensor 8 • 30.10.
4-3. Digitizer Line up Technology : EMR only y 2. Resistive-DualTouch･･･ sensor + Resistive Touch screen interface 3. Capacitive-DualTouch･･･ sensor + Capacitive Touch screen interface 1. EMR only 9 • 30.10.
4-4. Digitizer Lineup Interface : UART, USB Si Signal l assignment i t (UART) 10 • 30.10.
4-5. Digitizer Lineup 11 • 30.10.
5. Display Lineup LCD---Kangaroo type 12 • 30.10.
6-1. Customizing Digitizer Condition for digitizer customization 1. Minimum Volume: 30K/ year y 2. There will be NRE and Tooling Cost 13 • 30.10.
6-2. Customizing Digitizer Sensor Board Design 1. Must be square shape rectangle 2. square heart round Must be flat NG OK 3 3. Non acti e area m Non-active must st be at least 4mm at each side outline tli active area 14 • 30.10.
6-3. Customizing Digitizer Sensor Board Design (continued) 4. Digitizer g active area needs at lease 1mm buffer from LCD active area at each side LCD outline 1mm 1mm 1mm LCD active area digitizer outline 1mm 15 • 30.10.
6-4. Customizing Digitizer Baby Board Design Only y standard design g available. Interface connector Connector C t on di digitizer: iti DF19L-14P-1H DF19L 14P 1H (HIROSE) or equivalent i l t Counterpart connector: DF19-14S-1S, DF19G-14S-1C (HIROSE) or equivalent 16 • 30.10.
6-5. Customizing Digitizer D Development l tS Schedule h d l No.
7-1. System Designing Prevention of EM noise problem Some transformers or coils in the po power er unit nit generates EM noise noise. To prevent this • • • Use transformers or coils that won’t allow magnetic flux leakage. Place them underneath the shield or in a distance as much as possible from the sensor board. Position them so that EM noise flux did not across the sensor board. EM noise source • • Inverter of LCD back light DC to DC converter in power circuit 18 • 30.10.
7-2. System Designing EM Noise Countermeasure LCD View B-B’ B Digitizer B’ Inverter or Digitizer is sensitive to Electromagnetic Noise. Inverter is one of the strongest EM source. Shielding the inverter with shield plate*1, would improve an affection of the EM noise from the Inverter Inverter. 19 • 30.10.
7-3. System Designing EM Noise Countermeasure2 PC Case COIL Like DC-DC Converter LCD Digitizer In case of PC in one body, motherboard is located right beneath the Digitizer g unit. Coils in the p power unit g generates the EM noise and it will cause of inaccuracy of the Digitizer. Shield the COIL with shield plate*1 for better Digitizer quality. 20 • 30.10.
7-4. System Designing Example of Noise Shield1 Noise Source 21 • 30.10.
7-5. System Designing Example of Noise Shield2 Noise Source 22 • 30.10.
8-1. System Designing2 Reduction of metal influence Some metal structure reduces digitizer signal which causes coordinate error. To prevent this • • Do not use metal for upper case. Contact Wacom to make Error calibrated firmware data. Metal influence source • • LCD metal bezel and lamp cover Upper case ( if it is made of metal ) 23 • 30.10.
8-2. System Designing2 Minimize Metal influence LCD Upper Bezel Upper case LCD Lamp cover EM signal decrease Metal on the digitizer will disturb the EM signal from the pen. 24 • 30.10.
8-3. System Designing2 Bad Example of Metal Parts1 Full Metal Upper Case 25 • 30.10.
8-4. System Designing2 Bad Example of Metal Parts2 Wrapped by Metal Sheet 26 • 30.10.
9-1. System Calibration Wacom will do following evaluation in order to prevent adverse affect from EM noise and metal parts 1. 2. 3 3. EM noise environment Coordinate stability Coordinate accuracy Wacom will provide FW data and evaluation report. Calibration work will take approximately 1-2 weeks. C lib i work Calibration k charge h iis US$1 US$1,200 200 per calibration. lib i 27 • 30.10.
9-2. System Calibration EM noise environment EM noise which mimic pen signal can cause digitizer malfunction. • Wacom will search the EM noise and measure the level level. • 28 • 30.10.
9-3. System Calibration Coordinate stability EM noise can cause vibration of coordinate detected by digitizer (jitter). Wacom quantifies the level of jitter by take 100 coordinate data at each spot and calculating standard deviation and max deviation from mean location. 29 • 30.10.
9-4. System Calibration C di t accuracy b Coordinate before f calibration lib ti Metal parts or EM noise will disturb digitizer signal and can cause the deterioration of digitizer accuracy. Digitizer signal can be compensated by calibration up to certain level. Wacom measures the accuracy before and after calibration. 30 • 30.10.
9-5. System Calibration Coordinate accuracy after calibration 31 • 30.10.
9-6. System Calibration Before sending calibration machine, please check below items. 1 1. 2. 3. 3 4. 5. 6. 7. Final design Tooled product All c criteria te a for o syste system des design g is s followed o o ed All accessories (eg. AC adaptor) are enclosed Valid OS is installed Wacom stylus (which pen to use with) Assembly drawing to show LCD and digitizer position Note: Calibration is required for each design. Any material or design changes will need another calibration.
10. Driver Device Driver Windows Vista, Windows XP, Windows 2000, Windows CE , Symbian Note: for dual touch, standard interface is USB 33 • 30.10.
