Scanner system with local scanning capability for graphic reading

• US 5,026,953 A
• Filed: 03/20/1990
• Issued: 06/25/1991
• Est. Priority Date: 03/20/1990
• Status: Expired due to Fees

• Current Assignee: Wintime Technology, Inc.
• Original Assignee: Wintime Technology, Inc.
• Inventors: Hsu, Danny
• Primary Examiner(s): Schreyer, Stafford D.
• Application Number:
  US07/495,993
• Time in Patent Office: 462 Days
• Field of Search: 178/19, 178/18, 250/556, 250/271, 250/334, 382/58, 382/59, 382/80, 382/65, 382/67, 382/69, 382/13
• US Class Current: 178/18.01
• CPC Class Codes: G06F 3/03543 Mice or pucks G06F3/03541 takes precedence

Abstract

A scanner system with local scanning capability for graphic reading, which comprises a tablet, a scanner, a stylus or cursor control mouse and a main frame CPU. The scanner comprises a plurality of oscillators (induction coils) at both sides by the light source thereof to produce induced current on the plane of circuit of the tablet. The CPU of the tablet obtains the X,Y coordinate data of the oscillators through sample-and-hold amplifier circuit and A/D converter circuit. Simultaneously, the scanner projects light to reflect the picture to CCD so as to record the start and end location of every line. After a picture is read by the scanner the digital data of every line of the image and the X, Y coordinate data of the start and end location of every line of the image are stored in the storage of the main frame for further graphic data processing through its CPU so that any image distortion can be modified and local scanning can be achieved. The scanner is controlled to move by the tablet which provides a high resolution of 1000 lines per inch, such that the pitch between lines can be shortened, and a clear image can be obtained.

Claims

1. A scanner system with local scanning capability for graphic reading, including:

a tablet comprising a plane of circuit formed of horizontal and vertical multiplex circuits for scanning and controlled by a tablet CPU to indicate the corresponding location of an induced current, said induced current being treated through a sample-and-hold amplifier circuit and A/D converter circuit and sent to said tablet CPU to provide the corresponding coordinate data of the induced location;

a scanner connected to said tablet CPU, comprising a plurality of oscillators at both sides by the light source thereof to induce an induced current on said plane of circuit permitting said plane of circuit to induce the X, Y coordinate data of patterns, characters and lines, said light source being to projecting light on a reading target for reflection an image of said reading target to a CCD through glasses to produce digital data corresponding to said image through the operation of a scanning circuit and a graphic digitizing circuit;

a stylus connected to said tablet CPU, comprising an oscillator and being used to localize a preferred scanning region on said plane of circuit permitting said tablet to provide the coordinate data of the localized region; and

a main frame comprising a CPU to process and store the digital data provided from said tablet CPU via an input/output circuit;

characterized in that when said scanner is placed on said plane of circuit it obtains the X, Y coordinate data of the detected lines from the start to the end through its oscillators and simultaneously obtains the digital data of the image which is reflected from the reading target placed on said plane of circuit to said CCD by the light projected from its light source;

when said scanner is moving on said plane of circuit its oscillators to move and the change of X, Y coordinate data is simultaneously detected by said tablet to drive said scanner to read the digital data of the new image detected for matching with the last digital data it obtained so as to modify any distorted graphic character.

2. The scanner system as claimed in claim 1, wherein said stylus (or cursor control mouse) is used to define a localized region on said tablet and drive said scanner to scan said localized region.