Graphics input apparatus
US4875033A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1987 |
| Grant date | Oct 17, 1989 |
| Priority date | — |
| Expiry date | Jun 2, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P90/02
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The graphics input apparatus enables an operator to input a two or three-dimensional schematic figure into a computer simply by hand-writing a two-dimensioanl figure in a picture plane of a display device such as a cathode ray tube. The graphics input apparatus is provided with a display device, a memory, a position indicator for indicating predetermined positions in the picture plane of the display device, and a cursor display for displaying a cursor at the position indicated by the position indicator. Element inputting means displays a starting point at the indicated position of the cursor, assigning a specified node number to a node in the vicinity of the starting node if the node has not been specifically numbered, storing the node number in memory, displaying the elements at the position to which the cursor is moved by the position indicator, further displaying an ending point, assigning a specified node number to a node in the vicinity of the ending point if the node is not already numbered, storing the node number of the nodes in the vicinity of the ending point and making the memory store information on connection between the starting point and the ending point. Shape recog…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.