IMAGE SENSING DEVICE FOR IMPROVING IMAGE QUALITY AND REDUCING COLOR SHIFT EFFECT

• US 20050230597A1
• Filed: 11/24/2004
• Published: 10/20/2005
• Est. Priority Date: 04/15/2004
• Status: Abandoned Application

• Current Assignee: PixArt Imaging Incorporated
• Original Assignee: PixArt Imaging Incorporated
• Inventors: Huang, Chien-Chang, Hsieh, Chih-Cheng
• Application Number:
  US10/904,742
• Publication Number:
  US 20050230597A1
• Time in Patent Office: Days
• US Class Current: 250/208.100
• CPC Class Codes: G01J 3/51 using colour filters
• CPC Class Codes: H01L 27/14621 Colour filter arrangements
• CPC Class Codes: H01L 27/14625 Optical elements or arrangements associated with the device
• CPC Class Codes: H01L 27/14627 Microlenses

Abstract

An image sensing device includes a plurality of color units. Each color unit has a photosensor element for converting light of a specific spectrum range into an electrical signal. Different arrangements of the photosensor elements are set in diagonal directions. In this way, such layout is capable of reducing color shift effect.

Claims

1. An image sensing device for reducing color shift effect comprising:

a plurality of color units each comprising a photosensor element for converting light of a specific spectrum range into an electrical signal;

wherein different arrangements of the photosensor elements are set in diagonal directions.

2. The image sensing device of claim 1, wherein the arrangements of the photosensor elements of the colors unit at opposed diagonals are separated by a 180-degree angle.

3. The image sensing device of claim 1, wherein the plurality of color units are set in a plurality of areas, and the arrangement of all photosensor elements of the color units in the same area is identical.

4. The image sensing device of claim 3 comprising four areas, wherein the arrangements of the photosensor elements of the color units respectively in adjacent areas are separated by a 90 degree angle.

5. The image sensing device of claim 3 comprising four areas, wherein the arrangements of the photosensor elements of the color units respectively in different areas are separated by a 180-degree angle.

6. The image sensing device of claim 1, wherein each color unit comprises an amplifier, coupled to the photosensor element, for amplifying the electrical signal generated by the photosensor element.

7. The image sensing device of claim 1, wherein two adjacent photosensor elements with different arrangements are coupled to a single amplifier.

8. The image sensing device of claim 1, wherein each photosensor element is a charge-coupled device (CCD).

9. The image sensing device of claim 1, wherein each photosensor element is a CMOS photosensor.

10. The image sensing device of claim 1, wherein the plurality of color units are aligned as a Bayer pattern color filter array.

11. The image sensing device of claim 1, wherein each color unit further comprises a filter element for filtering out light inconsistent with the red, green, or blue light spectrum.

12. The image sensing device of claim 1, wherein each color unit further comprises a filter element for filtering out light inconsistent with the yellow, magenta, or cyan light spectrum.