Infrared correction in color scanners

• US 6,768,565 B1
• Filed: 09/07/2000
• Issued: 07/27/2004
• Est. Priority Date: 09/07/2000
• Status: Expired due to Fees

• Current Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Original Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Inventors: Jedlicka, Josef E., Perregaux, Alain E.
• Primary Examiner(s): Coles, Edward
• Assistant Examiner(s): SHERRILL, JASON L
• Application Number:
  US09/657,342
• Time in Patent Office: 1,419 Days
• Field of Search: 358/512, 358/513, 358/514, 358/482, 358/483, 250/208.1, 250/226, 250/214, 250/338.1, 250/339.02, 250/339.05, 257/277, 438/70, 438/71, 359/356, 359/351, 359/352, 359/353
• US Class Current: 358/505
• CPC Class Codes: H01L 27/14621 Colour filter arrangements
• CPC Class Codes: H04N 1/031 the photodetectors having a one-to-one and optically positive correspondence with the scanned picture elements, e.g. linear contact sensors
• CPC Class Codes: H04N 2201/02493 Additional optical elements not otherwise provided for, e.g. filters, polarising plates, masks or apertures

Abstract

The present invention generally relates to a digital scanner for scanning images. More specifically, the present invention is directed to a method and apparatus for enhancing the quality of scanned images obtained by filtering out the infrared component of digital data to provide enhanced digital images.

Claims

1. A semiconductor device comprising:

a main surface including first, second and third linear arrays of photosites and bonding pads defined in the main surface, each linear array including a plurality of photosites;

a clear layer deposited over the main surface exclusive of the bonding pads;

a first primary color filter layer deposited over the first linear array;

a second primary color filter layer deposited over the second linear array; and

a third primary color filter layer deposited over a first subset of photosites in the third linear array, and an infrared filter layer deposited over a second subset of photosites in the third linear array.

2. The semiconductor device as in claim 1, wherein the clear layer and the first, second and third primary color filter layers consist of polyimide or acrylic.

3. The semiconductor device as in claim 1, wherein the infrared filter layer consists of polyimide.

4. The semiconductor device as in claim 1, wherein the third primary color is red.

12. The device of claim 1, wherein the photosites in the second subset are substantially regularly distributed among the photosites of the first subset along the third linear array.

13. The device of claim 12, wherein the photosites in the second subset alternate with the photosites of the first subset along the third linear array.

5. An assembly comprising:

a substrate; and

a plurality of semiconductor chips attached to the substrate and arranged end to end to form a full width array having three linear arrays of photosites on the substrate, each of the semiconductor chips having a main surface including first, second and third linear arrays of photosites and bonding pads defining the main surface, a clear layer deposited over the main surface exclusive of the bonding pads, a first primary color filter layer deposited over the first linear array, a second primary color filter layer deposited over the second linear array, and a third primary color filter layer deposited over a first subset of photosites on the third linear array and an infrared filter layer deposited over a second subset of photosites on the third linear array.

6. The assembly as in claim 5, wherein the clear layer and the first, second and third primary color filter layers consist of polyimide or acrylic.

7. The assembly as in claim 5, wherein the infrared filter layer consists of polyimide.

8. The assembly as in claim 5, wherein the third primary color is red.

14. The assembly of claim 5, wherein the photosites in the second subset are substantially regularly distributed among the photosites of the first subset along the third linear array.

15. The assembly of claim 14, wherein the photosites in the second subset alternate with the photosites of the first subset along the third linear array.

9. A digital imaging system for generating an image from output image signals comprising:

a photoreceptor;

a plurality of charging units charging the photoreceptor;

a plurality of exposure units receiving Image signals and exposing the photoreceptor to place a latent image on the photoreceptor based on the image signals;

a scanner for scanning the images, generating the output image signals and transmitting the output image signals to the exposure units, wherein the scanner includes a plurality of semiconductor chips mounted end to end to a substrate, wherein each semiconductor chip;

includes a main surface including first, second and third linear arrays of photosites and bonding pads defined in the main surface, a clear layer deposited over the main surface exclusive of the bonding pads and outer photosites, a first primary color filter layer deposited over the first linear array, a second primary color filter layer deposited over the second linear array, and a third primary color filter layer deposited on a first subset of photosites on the third linear array and an infrared filter layer deposited a second subset of photosites on the third linear array;

a plurality of developer structures, each developer structure being connected to a corresponding dispenser, each dispenser having a different toner, and each developer structure applying toner to the photoreceptor;

a transfer unit transferring the toner on the photoreceptor to a support material;

a fusing unit fusing the toner to the support material; and

a cleaner cleaning the photoreceptor after the support material has passed through the transfer unit.

10. The digital imaging system as in claim 9, wherein the clear layer and the first, second and third primary color filter layers consist of polyimide or acrylic.

11. The digital imaging system as in claim 9, wherein the infrared filter layer consists of polyimide.

16. A photosensitive imaging apparatus comprising:

a first linear array of photosites, the first linear array of photosites being sensitive to substantially only a first color in a visible spectrum;

a second linear array of photosites, the second linear array of photosites being sensitive to substantially only a second color in a visible spectrum;

a third linear array of photosites, including a first subset of photosites sensitive to substantially only a third color in a visible spectrum, and a second subset of photosites sensitive to substantially only infrared light.

17. The apparatus of claim 16, wherein the photosites in the second subset are substantially regularly distributed among the photosites of the first subset along the third linear array.

18. The apparatus of claim 17, wherein the photosites in the second subset alternate with the photosites of the first subset along the third linear array.

19. The apparatus of claim 16, wherein the photosites in the first subset are associated with a first translucent filter disposed thereon.

20. The apparatus of claim 19, wherein the photosites in the second subset are associated with a second translucent filter disposed thereon.

21. The apparatus of claim 20, wherein the second translucent filter includes polyimide.

22. The apparatus of claim 16, wherein the first, second, and third linear arrays are disposed on a semiconductor chip.

23. The apparatus of claim 16, further comprising a document handler for moving an image-bearing sheet relative to the first, second, and third linear arrays.