Projection type image display apparatus and adjusting method

• US 9,354,494 B2
• Filed: 01/15/2015
• Issued: 05/31/2016
• Est. Priority Date: 02/04/2014
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: Mashitani, Ken, Tani, Kazuma
• Primary Examiner(s): Le, Bao-Luan
• Application Number:
  US14/597,890
• Publication Number:
  US 20150219983A1
• Time in Patent Office: 502 Days
• US Class Current: 1/1
• CPC Class Codes: G02B 26/08 for controlling the direction of light in light guides G02B6/35
• CPC Class Codes: G02B 26/0875 by means of one or more refracting elements
• CPC Class Codes: G02B 26/0883 the refracting element being a prism
• CPC Class Codes: G02B 26/0891 forming an optical wedge
• CPC Class Codes: G03B 21/142 Adjusting of projection optics
• CPC Class Codes: G09G 2340/0407 Resolution change, inclusive of the use of different resolutions for different screen areas
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• CPC Class Codes: G09G 3/005 forming an image using a quickly moving array of imaging elements, causing the human eye to perceive an image which has a larger resolution than the array, e.g. an image on a cylinder formed by a rotating line of LEDs parallel to the axis of rotation
• CPC Class Codes: G09G 5/399 using two or more bit-mapped memories, the operations of which are switched in time, e.g. ping-pong buffers
• CPC Class Codes: H04N 9/3188 Scale or resolution adjustment scaling in general G06T3/40; resolution modifying circuits for displays in general G09G5/391

Abstract

A projection type image display apparatus includes an adjusting sub-frame image generator and a shift amount adjuster. The adjusting sub-frame image generator generates a primary adjusting sub-frame image having a design in which a first line having a first color and a width of an N pixel (N being a natural number) is displayed on a background image having a second color, and a secondary adjusting sub-frame image having a design in which a second line having a third color and a width of an M pixel set to N=M+α (M being an integer equal to or greater than 1, α being an integer equal to or greater than 0) is displayed on a background image having a fourth color. The shift amount adjuster adjusts the shift amount when the display positions of the primary and secondary adjusting sub-frame images on the projection surface are shifted relatively to each other.

Claims

1. A projection type image display apparatus configured to display an image formed of an image frame on a projection surface by projecting a plurality of sub-frame images forming the image frame onto the projection surface, the projection type image display apparatus configured to be capable of optically shifting projection positions of the sub-frame images when the sub-frame images are projected onto the projection surface,

the projection type image display apparatus comprising:

an adjusting sub-frame image generator configured to generate

a primary adjusting sub-frame image having a design in which a first line having a first color and a width of an N pixel (N being a natural number) is displayed on a background image having a second color; and

a secondary adjusting sub-frame image having a design in which a second line having a third color and a width of an M pixel where the width is set to N=M+α

(M being an integer equal to or greater than 1, α

being an integer equal to or greater than

     0) is displayed on a background image having a fourth color; and

a shift amount adjuster configured to adjust a shift amount when a display position of the primary adjusting sub-frame image on the projection surface and a display position of the secondary adjusting sub-frame image on the projection surface are shifted relatively to each other.

2. The projection type image display apparatus according to claim 1, wherein the adjusting sub-frame image generator generates the primary adjusting sub-frame image and the secondary adjusting sub-frame image in such a manner that

a relation of the width of the second line with respect to the width of the first line is set to N=M+1 or N=M+2, and

the first line and the second line are set so that the second line is displayed inside the first line when the primary adjusting sub-frame image and the secondary adjusting sub-frame image are projected onto the projection surface before adjustment of the shift amount.

3. The projection type image display apparatus according to claim 1, wherein the adjusting sub-frame image generator generates the primary adjusting sub-frame image and the secondary adjusting sub-frame image in such a manner that

the width of the first line and the width of the second line are each set to 1 pixel, and

the first line and the second line are set so that the second line is displayed in a position outside the first line and adjacent to a contour of the first line when the primary adjusting sub-frame image and the secondary adjusting sub-frame image are projected onto the projection surface before adjustment of the shift amount.

4. The projection type image display apparatus according to claim 1, wherein the adjusting sub-frame image generator generates the primary adjusting sub-frame image and the secondary adjusting sub-frame image in which the first color and the fourth color are both set to black and the second color and the third color are both set to white.

5. The projection type image display apparatus according to claim 1, wherein the adjusting sub-frame image generator generates the primary adjusting sub-frame image and the secondary adjusting sub-frame image in which the first color and the fourth color are both set to black and the second color and the third color are both set to green.

6. The projection type image display apparatus according to claim 1, wherein the adjusting sub-frame image generator generates the primary adjusting sub-frame image in which the first line is set to a design of combination of a line extending in a horizontal direction and a line extending in a vertical direction with respect to one side of an image to be displayed on the projection surface.

7. The projection type image display apparatus according to claim 6, wherein the adjusting sub-frame image generator generates the secondary adjusting sub-frame image in which the second line is set to a design of combination of a line extending in the horizontal direction and a line extending in the vertical direction with respect to the one side.

8. The projection type image display apparatus according to claim 6, wherein the adjusting sub-frame image generator generates the secondary adjusting sub-frame image in which the second line is set to a design of a line extending in either the horizontal direction or the vertical direction with respect to the one side.

9. The projection type image display apparatus according to claim 1, wherein the adjusting sub-frame image generator generates the primary adjusting sub-frame image and the secondary adjusting sub-frame image in which each of the first line and the second line is set to a design of a line extending in a diagonal direction with respect to one side of an image to be projected onto the projection surface.

10. The projection type image display apparatus according to claim 1, wherein, when two sub-frame images form one image frame in the projection type image display apparatus, the adjusting sub-frame image generator generates the one primary adjusting sub-frame image and the one secondary adjusting sub-frame image in the one image frame.

11. The projection type image display apparatus according to claim 1, wherein, when four sub-frame images form one image frame in the projection type image display apparatus, the adjusting sub-frame image generator generates the one primary adjusting sub-frame image, and the one secondary adjusting sub-frame image or a plurality of the secondary adjusting sub-frame images in the one image frame.

12. The projection type image display apparatus according to claim 1, wherein,

in a case where the shift amount, when the primary adjusting sub-frame image and the secondary adjusting sub-frame image are projected onto the projection surface, is defined as S, and a shift amount, when an image except the primary adjusting sub-frame image and the secondary adjusting sub-frame image is projected onto the projection surface, is defined as So,

the shift amount adjuster sets a relation between the shift amount S and the shift amount So to

So=S×

(α

%2+1)/2

where α

%2 represents a remainder when a is divided by 2.

13. An adjusting method for adjusting a shift amount of a projection type image display apparatus,

the projection type image display apparatus configured to display an image formed of an image frame on a projection surface by projecting a plurality of sub-frame images forming the image frame onto the projection surface, the projection type image display apparatus configured to be capable of optically shifting projection positions of the sub-frame images when the sub-frame images are projected onto the projection surface,

the adjusting method comprising:

generating a primary adjusting sub-frame image that has a design in which a first line having a first color and a width of an N pixel (N being a natural number) is displayed on a background image having a second color;

generating a secondary adjusting sub-frame image that has a design in which a second line having a third color and a width of an M pixel where the width is set to N=M+α

(M being an integer equal to or greater than 1, α

being an integer equal to or greater than

     0) is displayed on a background image having a fourth color; and

shifting a display position of the primary adjusting sub-frame image on the projection surface and a display position of the secondary adjusting sub-frame image on the projection surface relative to each other.