Touch Pad with slide and position two mode.pptVIP

The Wei-Hua Co. ( ShenZhen ) Notice : Patent Pending in China 200810028397.X and Global priority for 3 years according to PCT The Easy to Use and Low Cost Touch Pad for NB  Modify the Touch pad SOC drive software, let it can judge the finger tip motion at the primary stage is 1.quick click or 2. stay on for short time of 0.3 - 0.5sec or 3. sliding on touch pad. 1. If finger quick click, send the L key or R key signal according to the position clicked.  2. If finger short time stay on same position for 0.3-0.5sec ---use absolute Position mode  3. If finger sliding ---use Relative Sliding Mode  Operate Touch Pad by two steps  STEP 1. short time stay on one point for 0.3-0.5sec --- Execute Absolute Position mode Put on the Touch Pad by finger tip at the position where contrast to the target on screen. ------The cursor on screen will direct move directly to the position contrast to the pointing position on touch pad.  ------ If finger stay excess 0.3 - 0.5sec and move cursor to near target.  Then can keep contact touch pad and slide finger, the cursor will move by absolute position mode.  STEP 2. sliding on surface -----Execute Relative Sliding Mode  ----Lift finger tip and the software resume simultaneously,  Then put finger on touch pad again and slide a little to achieve target.   Although operate by two steps but no need to slide for 3-4 times, so the overall efficiency is higher. The other benefit is cost down because can use smaller PCB and low grade IC, also no need to use double IC Even can replace optical mouse The Shortage of Common NB 1. The sensitivity and utility of