OPTICAL READER HAVING REDUCED SPECULAR REFLECTION READ FAILURES

• US 20110049245A1
• Filed: 08/09/2010
• Published: 03/03/2011
• Est. Priority Date: 06/03/2005
• Status: Active Grant

• Current Assignee: Ynjiun P. Wang
• Original Assignee: Ynjiun P. Wang
• Inventors: Wang, Ynjiun P.
• Granted Patent: US 8,196,839 B2
• Time in Patent Office: Days
• US Class Current: 235/472.01
• CPC Class Codes: G06K 7/10 by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
• CPC Class Codes: G06K 7/10722 Photodetector array or CCD scanning
• CPC Class Codes: G06K 7/10732 Light sources
• CPC Class Codes: G06K 7/10752 Exposure time control
• CPC Class Codes: G06K 7/10811 Focalisation
• CPC Class Codes: G06K 7/12 using a selected wavelength, e.g. to sense red marks and ignore blue marks
• CPC Class Codes: G06K 7/14 using light without selection of wavelength, e.g. sensing reflected white light G06K7/10831 - G06K7/1097 take precedence
• CPC Class Codes: G06K 7/1417 2D bar codes
• CPC Class Codes: G06K 7/1443 locating of the code in an image
• CPC Class Codes: G06T 2207/10024 Color image
• CPC Class Codes: G06T 7/90 Determination of colour characteristics
• CPC Class Codes: H04N 23/10 for generating image signals from different wavelengths
• CPC Class Codes: H04N 23/843 Demosaicing, e.g. interpolating colour pixel values
• CPC Class Codes: H04N 25/134 based on three different wavelength filter elements
• CPC Class Codes: H04N 25/42 by switching between different modes of operation using different resolutions or aspect ratios, e.g. switching between interlaced and non-interlaced mode
• CPC Class Codes: H04N 25/532 by controlling global shutters in CMOS SSIS
• CPC Class Codes: H04N 25/76 Addressed sensors, e.g. MOS or CMOS sensors

Abstract

There is provided in one embodiment an optical reader having an image sensor array. In one embodiment, the image sensor array can include a first subset of pixels and a second subset of pixels. The first subset of pixels can be devoid of light polarizing filter elements, and the second subset of pixels can be light polarizing pixels including light polarizing filter elements. An optical reader can be configured to selectively read out image data from an image sensor array'"'"'s light polarizing pixels.

Claims

1. An optical reading device, said optical reading device comprising:

a solid state image sensor array having a plurality of pixels, the plurality of pixels being formed in a plurality of rows of pixels, wherein the solid state image sensor array includes a first subset of pixels, a second subset of pixels, and a third subset of pixels, the first subset of pixels being monochrome pixels, the second subset of pixels being color sensitive pixels, and a third subset of pixels being light polarizing pixels;

an imaging lens focusing an image onto said solid state image sensor array;

a hand held housing encapsulating said solid state image sensor array;

wherein said optical reading device is operative to read out a frame of image data from the solid state image sensor array, the frame of image data having image data corresponding to at least one of the first subset of pixels, the second subset of pixels, and the third subset of pixels.

2. The optical reading device of claim 1, wherein the optical reading device is operative so that for read out of the frame of image data, the optical reading device reads out image data from pixels of more than one of the first, second, and third subset of pixels.

3. The optical reading device of claim 1, wherein the optical reading device is operative so that for read out of the frame of image data, the optical reading device selectively addresses pixels of the first subset of pixels and selectively reads out image data from pixels of the first subset of pixels.

4. The optical reading device of claim 1, wherein the optical reading device is operative so that for read out of the frame of image data, the optical reading device selectively addresses pixels of the second subset of pixels and selectively reads out image data from pixels of the second subset of pixels.

5. The optical reading device of claim 1, wherein the optical reading device is operative so that for read out of the frame of image data, the optical reading device selectively addresses pixels of the third subset of pixels and selectively reads out image data from pixels of the third subset of pixels.

6. The optical reading device of claim 1, wherein the optical reading device is operative so that for read out of the frame of image data, the optical reading device reads out image data from pixels of more than one of the first, second, and third subset of pixels, and wherein the optical reading device is operative to selectively extract from the frame of image data image data corresponding to the third subset of pixels.

7. The optical reading device of claim 1, wherein said optical reading device includes separate reset control lines for facilitating independent reset of pixels of said first subset of pixels, said second subset of pixels, and said third subset of pixels.

8. The optical reading device of claim 1, wherein the optical reading device is operative to sense a saturation condition.

9. The optical reading device of claim 1, wherein the optical reading device is operative to sense a saturation condition by analysis of image data.

10. The optical reading device of claim 1, wherein the optical reading device includes an illumination assembly.