Illumination compensation device of scanner

• US 5,950,053 A
• Filed: 06/16/1998
• Issued: 09/07/1999
• Est. Priority Date: 01/29/1997
• Status: Expired due to Fees

• Current Assignee: Bob Lin
• Original Assignee: Bob Lin
• Inventors: Lin, Bob
• Primary Examiner(s): Braun, Fred L
• Application Number:
  US09/097,805
• Time in Patent Office: 448 Days
• Field of Search: 399/220, 362/217, 362/225, 358/480, 358/509
• US Class Current: 399/220
• CPC Class Codes: H04N 1/02815 Means for illuminating the original, not specific to a particular type of pick-up head
• CPC Class Codes: H04N 1/0287 using a tubular lamp or a combination of such lamps
• CPC Class Codes: H04N 1/02885 Means for compensating spatially uneven illumination, e.g. an aperture arrangement

Abstract

An illumination compensation device of a scanner for balancing the light intensity on the optic-electric sensor of the scanner and facilitating the connection of the power wires and power supply. The device includes at least one curved light source having a curved middle portion and two bent ends whereby the light intensity on a whole optic-electric sensor can transfer images to electric signals without distortion, and the scanning quality is upgraded. In addition, both bent ends of the curved light source of the invention can facilitate the connection of its power wires and power supply.

Claims

1. An illumination compensation device of a scanner, comprising:

at least one light source, providing bright light, including a curved middle portion and two ends, the two ends being bent asymmetrically inward;

whereby the bright light of said light source projected to a document sheet being scanned, an image of the document sheet being focused to an optic-electric sensor of the scanner through a lens of the scanner with uniform light intensity on said whole optic-electric sensor, and the scanning quality of the scanner are upgraded.

2. The illumination compensation device of a scanner of claim 1, wherein one of said bent ends of said light source is L-shape and the other of said bent ends of said light source is U-shape.