Browse Prior Art Database

Method and Apparatus for a Personal Digital Notepad with on-board handwriting recognition Disclosure Number: IPCOM000021599D
Original Publication Date: 2004-Jan-26
Included in the Prior Art Database: 2004-Jan-26
Document File: 2 page(s) / 45K

Publishing Venue



This invention describes a personal digital notepad with on-board handwriting recognition.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 52% of the total text.

Page 1 of 2

Method and Apparatus for a Personal Digital Notepad with on-board handwriting recognition

A personal digital notepad (PDN) is a device which records a user's handwriting simultaneously on paper and electronically as the user writes on the device. The electronic copy of the handwriting is a close approximation to the image of the handwriting on the paper. The system is analogous to an electronic version of carbon paper.

A PDN consists of a stylus and a suitably flat housing containing a power supply, power switch, display, triangulation device and electronic components for managing the operation of the device, recording the signal from the triangulation device and transmitting the recorded handwriting to other electronic devices. The user places paper on the housing and turns the PDN on. When the user writes with the stylus on the paper, the triangulation device in the housing triangulates in the tip of the stylus where it is writing on the paper. The location of the tip of the stylus is recorded by the electronic components in the housing and saved to non-volatile memory. The recorded data may then be saved, erased or uploaded to another device such as a personal computer. One embodiment of a PDN is the A.T. Cross CrossPad (*).

PDN's have numerous advantages over other similar technologies. They are lightweight compared to the Tablet PC (**). Since PDN's use paper as their writing surface, they do not suffer from glare, contrast and parallax problems that can occur when using the Tablet PC. Since they have minimal computational power, they require significantly less electrical power compared to Tablet PC's. Since PDN's are paper-based, a hardcopy of the user's handwriting is always available even when power is not available. Since a paper copy is made when using a PDN, it is useful in legal transactions and retail purchases. Because of PDN's minimal computational and power requirements they can be made larger then personal digital assistants (PDA's) allowing more room for the user to write. PDN's also have longer battery lives than PDA's.

To date, han...