Browse Prior Art Database

Touch Sensor TrackPoint

IP.com Disclosure Number: IPCOM000132448D
Original Publication Date: 2005-Dec-16
Included in the Prior Art Database: 2005-Dec-16
Document File: 2 page(s) / 82K

Publishing Venue

IBM

Abstract

The invention provides an improved TrackPoint device for the laptop or portable computer. The new design has a sensor on the TrackPoint head. This sensor is capable of detecting vertical clicks or vertical pressure, as well as sliding moves in any horizontal direction.

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Touch Sensor TrackPoint

The present implementation of the track point pointing stick in Laptop or portable computer (e.g. ThinkPad) works like a mouse device. The TrackPoint is very convinent. But the size of the track point head is small and one finger is used to use the TrackPoint. In order to give more traction, the TrackPoint head is covered with a cap. But the TrackPoint is not good for the regular user who spend many hours of use. It strains user's finger tip. These are the prior arts (see http://www.almaden.ibm.com/cs/user/tp/tp.html ): Tactile TrackPoint - The Tactile TrackPoint has an actuator beneath the TrackPoint device which can stimulate the user's finger. It actually bumps up against your finger to give you tactile feedback which indicates the meaning of the cursor location. Negative Inertia TrackPoint - The dynamics of cursor movement are important for fast and accurate manipulation. With static transfer functions, the movement is always somewhat sluggish. It takes a finite time for the user to apply and remove force from the TrackPoint. Therefore the cursor motion always starts and stops slowly, as if the cursor had inertia -- it takes time to get it moving and get it to stop again. Negative Inertia solves this problem by counteracting that inertia. This effect is accomplished by exaggerating changes in the input force.

The Laptop computer also provide the trackpad as the replacement of the TrackPoint. But it is also not user friendly and many times, it is not easy to point the curser accurately. Thus, many users turn to the USB mouse device or wireless mouse device.

The invention provides an improved TrackPoint device for the laptop or portable computer. The new design has a sensor on the TrackPoint head. This sensor is capable of detecting vertical clicks or vertical pressure, as well as sliding moves in any horizontal direction. By touching and sliding the sensor on the TrackPoint head (moving finger to the target direction), the cursor moves in the target direction. In other words, the cursor follows the fingertip movement and therefore user does not need to press the TrackPoint to move the cursor.

The current implementations of the TrackPoint and Track Pad cursor mover is to provide user with a convenient function without attachable mouse for the laptop and portable computers. User holds hands in the typing position and presses TrackPoint with either index finger on the stick in the direction you want the cursor to move. Pressing the stick away from user moves the cursor up the screen; pressing it toward user moves the cursor down the screen. Yo...