ELECTRO-OPTICAL DEVICE, IMAGE PROCESSING CIRCUIT, AND ELECTRONIC DEVICE

• US 20080024652A1
• Filed: 06/27/2007
• Published: 01/31/2008
• Est. Priority Date: 07/25/2006
• Status: Abandoned Application

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: AOKI, Toru
• Application Number:
  US11/769,498
• Publication Number:
  US 20080024652A1
• Time in Patent Office: Days
• US Class Current: 348/361
• CPC Class Codes: H04N 9/3105 for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators simultaneous projection in colour photography G03B33/10; beam splitting or combining systems per se G02B27/10
• CPC Class Codes: H04N 9/312 Driving therefor driving of electronic spatial light modulators in displays other than projection devices G09G3/34, G09G3/36; control of liquid crystal elements G02F1/133; control of micromechanical modulators G02B26/08
• CPC Class Codes: H04N 9/3182 Colour adjustment, e.g. white balance, shading or gamut white balance per se H04N9/73; control of amplitude of colour signals H04N9/68; colour control circuits for displays in general G09G5/02, G09G3/2003, G09G3/3607

Abstract

An electro-optical device in which an image to be projected on a projection surface as a projection image having a size changed by a display device is displayed on a display area on the basis of input image data includes a first input image correction circuit generating first correction data which is used for reducing color non-uniformity of the projection image that occurs due to the size change on the basis of the size of the projection image using first reference correction data and correcting the input image data using the generated first correction data and a second input image correction circuit correcting the corrected input image data on the basis of a plurality of second reference correction data corresponding to a plurality of specific levels among levels that the input image data can have and set for a plurality of sets of reference coordinates in the display area for reducing the color non-uniformity.

Claims

1. An electro-optical device in which an image to be projected on a projection surface as a projection image having a size changed by a display device is displayed on a display area on the basis of input image data, the electro-optical device comprising:

a first input image correction circuit that (1) generates first correction data based on the size of the projection image and first reference correction data and (2) corrects the input image data using the generated first correction data; and

a second input image correction circuit that (1) corrects the input image data corrected by the first input image correction circuit based on a plurality of second reference correction data corresponding to a plurality of specific levels among preset input image data levels or for each set of a plurality of sets of reference coordinates in the display area.

2. The electro-optical device according to claim 1,

the display device being a projection-type display device including a zoom function for changing the size of the projection image;

and

the first input image correction circuit comprising;

a zoom amount detecting circuit that detects a zoom amount of the zoom function of the display device;

a first reference correction data storage circuit that stores a plurality of the first reference correction data, the first reference correction data being set to correspond to a plurality of specific zoom amounts among the zoom amounts;

a first correction data generating circuit that generates the first correction data by interpolating the plurality of the first reference correction data in accordance with the detected zoom amount; and

a first correction data adding circuit that adds the first correction data to the input image data.

3. The electo-optical device according to claim 2,

the first reference correction data storage circuit storing the first reference correction data for (1) each of the plurality of specific levels of the input image data or (2) for each set of reference coordinates, and

the first correction data generating circuit interpolating the plurality of first reference correction data among (1) the specific levels that are different from each other or (2) the sets of reference coordinates that are different from each other.

4. The electro-optical device according to claim 1, the second correction circuit comprising:

a second reference correction data storage circuit that stores the second reference correction data for each set of reference coordinates;

a second correction data generating circuit that generates second correction data corresponding to each level by performing an interpolation process for the levels of the second reference correction data for each set of reference coordinates;

a second correction data storage circuit that stores second correction data in correspondence with a set of reference coordinates and a level of the plurality of levels;

a second correction data selecting circuit that selects a second correction data among the second correction data stored in the second correction data storage circuit that corresponds to a plurality of sets of reference coordinates positioned in proximity to a set of coordinates determined based on address information in the display area and the level;

a third correction data generating circuit that generates third correction data corresponding to the input image data by interpolating the coordinates of the second correction data selected by the second correction data selecting circuit; and

a third correction data adding circuit that adds the third correction data to the corrected input image data.

11. An electronic device comprising:

a housing; and

an electro-optical device according to claim 1 positioned within the housing.

12. A projection-type display device comprising:

a housing; and

an electro-optical device according to claim 2 positioned within the housing.

5. An electro-optical device in which an image to be projected on a projection surface as a projection image having a size than can be changed is displayed in a display area on the basis of input image data, the electro-optical device comprising:

a first correction circuit that (1) generates correction data for reducing color non-uniformity of the projection image based on a plurality of reference correction data that correspond to a plurality of predetermined input image data levels and each set of a plurality of sets of reference coordinates in the display area; and

a second correction circuit that corrects the correction data based on a correction coefficient that is set based on a change in the size of the projection image.

6. The electro-optical device according to claim 5, the first correction circuit comprising:

a reference correction data storage circuit that stores the reference correction data for each set of reference coordinates;

a first correction data generating circuit that generates first correction data corresponding to levels of the reference correction data by performing an interpolation process for the levels of the reference correction data for each set of reference coordinates;

a first correction data storage circuit that stores the first correction data in correspondence with a set of reference coordinates and a level,

a selection circuit that selects a first correction data piece among the first correction data stored in the first correction data storage circuit which corresponds to a plurality of sets of reference coordinates positioned near a set of coordinates determined on the basis of address information in the display area and the level; and

a correction data generating circuit that generates the correction data by interpolating the set of coordinates of the first correction data piece selected by the selection circuit.

7. An image processing circuit for reducing color non-uniformity of a projection image which occurs on the basis of a change in the size of the projection image at a time when an image displayed in a display area of an electro-optical device is projected on a projection surface as the projection image, the image processing circuit comprising:

a first input image correction circuit that generates first correction data, based on the size of the projection image and that corrects the input image data using the generated first correction data; and

a second input image correction circuit that corrects the corrected input image data based on a plurality of second reference correction data that correspond to a plurality of specific levels among levels that the input image data can have or corresponding to each set of a plurality of sets of reference coordinates in the display area.

8. An image processing circuit for reducing color non-uniformity of a projection image based on a change in the size of the projection image at a time when an image displayed in a display area of an electro-optical device is projected on a projection surface as the projection image, the image processing circuit comprising:

a first correction circuit that generates correction data for reducing color non-uniformity of the projection image based on a plurality of reference correction data that correspond to a plurality of specific predetermined input image data levels and for each set respectively of a plurality of sets of reference coordinates in the display area; and

a second correction circuit that corrects the correction data based on a correction coefficient that is set in accordance with the size change.

9. An image processing method of reducing color non-uniformity of a projection image which occurs based on a change in the size of the projection image at a time when an image displayed in a display area of an electro-optical device is projected on a projection surface as the projection image, the image processing method comprising:

generating first correction data, based on the size of the projection image

correcting the input image data using the generated first correction data; and

correcting the corrected input image data based on a plurality of second reference correction data that correspond to a plurality of specific predetermined input image data levels and for each set respectively of a plurality of sets of reference coordinates in the display area.

10. An image processing method for reducing color non-uniformity of a projection image which occurs based on a change in the size of the projection image at a time when an image displayed in a display area of an electro-optical device is projected on a projection surface as the projection image, the image processing method comprising:

generating correction data for reducing color non-uniformity of the projection image based on a plurality of reference correction data that corresponds respectively to a plurality of specific levels among predetermined input image data levels and each set respectively of a plurality of sets of reference coordinates in the display area; and

correcting the correction data based on a correction coefficient that is set in accordance with the size change.

13. An image processing circuit, comprising:

a first color correction circuit that receives input image data, the first color correction circuit including;

a zoom amount detecting circuit that detects a detected zoom amount of the projection lens; and

a first correction unit that (1) calculates first correction data based on a reference data set and the detected zoom amount, and (2) adds the first correction data to the input image data to generate an updated correction data; and

a second color correction circuit that receives the updated correction data, the second color correction circuit including

an interpolation processing circuit that generates a coordinate correction data piece based on a reference coordinate correction data set; and

a second correction unit that (1) generates second correction data based on the coordinate correction data piece, (2) adds the second correction data to the updated correction data to generate color non-uniformity correction data.