Image display apparatus and image display method

• US 9,406,111 B2
• Filed: 01/12/2015
• Issued: 08/02/2016
• 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:
  US14/594,820
• Publication Number:
  US 20150123989A1
• Time in Patent Office: 568 Days
• US Class Current: 1/1
• 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 measuring unit configured to acquire first imaging data by imaging the first image projected by the projecting unit, and acquire second imaging data by imaging the second image projected by the projecting unit; and

an image-signal correcting unit configured to correct image signals of the first image based on the first imaging data and the second image data to reduce the displacement of the first image.

2. The projector of claim 1, wherein

the projecting unit is configured to project a third image of a third color,

the measuring unit is configured to acquire third imaging data by imaging the third image projected by the projecting unit, and

the image-signal correcting unit is configured to correct image signals of the first image based additionally on the third imaging data to reduce displacement of the first image.

3. The projector of claim 1, wherein the image-signal correcting unit is configured to correct the image signals of the first image by interpolation processing.

4. The projector of claim 1, further comprising a zoom-state detecting unit that is configured to detect a zoom state of the images displayed by the projecting unit.

5. The projector of claim 1, further comprising a storing unit that is configured to store a first displacement amount of the first image, and store a second displacement amount of the second image.

6. The projector of claim 1, wherein

the storing unit is configured to store a third displacement amount of a third image, and

the image-signal correcting unit is configured to correct image signals of the third image according to the third displacement amount to reduce the displacement of the third image.

7. The projector of claim 1, wherein

the image-signal correcting unit is configured to correct image signals of the first image based on calculated shift amounts relative to given reference positions of the projected first image.