Image display apparatus and image display method

• US 8,963,941 B2
• Filed: 03/12/2013
• Issued: 02/24/2015
• Est. Priority Date: 11/12/2007
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Aragaki, Takumi, Hasegawa, Hiroshi
• Primary Examiner(s): Sajous, Wesner
• Application Number:
  US13/795,732
• Publication Number:
  US 20130187945A1
• Time in Patent Office: 714 Days
• Field of Search: 345/581, 345/589, 345/606, 345/690, 345612-613, 345547-549, 348253-254, 348/553, 348/557, 348/560, 358518-520, 358/525, 382/162, 382/167, 382/254, 382/274, 382/276, 382/305, 382299-300, 353/46, 353 69- 70
• US Class Current: 345/581
• CPC Class Codes: G02B 27/1046 for use with transmissive spatial light modulators
• CPC Class Codes: G02B 27/145 having sequential partially reflecting surfaces
• CPC Class Codes: G02B 27/149 using crossed beamsplitting surfaces, e.g. cross-dichroic cubes or X-cubes
• CPC Class Codes: G02B 27/285 comprising arrays of elements, e.g. microprisms
• CPC Class Codes: G03B 21/006 using LCD's
• CPC Class Codes: G03B 33/12 using beam-splitting or beam-combining systems, e.g. dichroic mirrors
• CPC Class Codes: G06T 5/80 Geometric correction
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2320/02 Improving the quality of display appearance
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 2340/10 Mixing of images, i.e. displayed pixel being the result of an operation, e.g. adding, on the corresponding input pixels
• CPC Class Codes: G09G 2340/14 Solving problems related to the presentation of information to be displayed
• CPC Class Codes: G09G 3/002 to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: H04N 9/3185 Geometric adjustment, e.g. keystone or convergence optical or mechanical adjustment of convergence H04N9/317; using scanning means H04N3/22; optical or mechanical adjustments of projectors not peculiar to the presence of an electronic spatial light modulator G03B21/14
• CPC Class Codes: H04N 9/3194 including sensor feedback
• CPC Class Codes: H04N 9/3197 using light modulating optical valves

Abstract

An image display apparatus that displays an image on the basis of input image signals corresponding to sub-pixels forming one pixel includes a shift-amount storing unit that stores shift amounts of display positions of the sub-pixels relative to given reference positions in a display image, an image-signal correcting unit that corrects the input image signals according to the shift amounts, and an image display unit that displays an image on the basis of the image signals corrected by the image-signal correcting unit.

Claims

1. A projector comprising:

a projecting unit configured to project a first image of a first color and a second image of a second color;

a storing unit configured to store first information indicating displacement of the second image relative to the first image at a first position, and second information indicating displacement of the second image relative to the first image at a second position; and

an image-signal correcting unit configured to correct image signals of the second image according to the first information and the second information to reduce the displacement of the second image, wherein

the projecting unit projects a third image of a third color,

the storing unit stores information indicating displacement of the third image relative to the first image, and

the image-signal correcting unit corrects image signals of the third image according to the information indicating displacement of the third image to reduce the displacement of the third image.

2. The projector of claim 1, wherein the image-signal correcting unit corrects the image signals of the second image by interpolation processing.

3. The projector of claim 1, further comprising a zoom-state detecting unit that detects a zoom state of the images displayed by the projecting unit.

4. The projector of claim 1, wherein, for a given pixel, the storing unit stores a first displacement amount for a sub-pixel of the third color, and stores a second displacement amount for a sub-pixel of a fourth color.

5. The projector of claim 1, wherein the second image displayed by the projecting unit is also displayed on the basis of input image signals corrected by the image-signal correcting unit, the image-signal correcting unit using same displacement amounts used in a display of the first image.

6. The projector of claim 1, wherein

the information indicating displacement of the third image relative to the first image includes third information indicating displacement of the third image relative to the first image at the first position, and fourth information including displacement of the third image relative to the first image at the second position, and

the image-signal correcting unit configured to correct image signals of the third image according to the third information and the fourth information to reduce displacement of the third image.