Image display device and display unit for image display device

Patent metadata

Field	Value
Publication number	US-9599323-B2
Application number	US-201314021223-A
Country	US
Kind code	B2
Filing date	Sep 9, 2013
Priority date	Feb 25, 2008
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

To provide an image display device in which the number of pixels of arranged light emitting elements or the like can be reduced and the cost can be drastically reduced while image degradation is minimized, and a display unit used therefor. In an image display device in which plural display units including pixels formed by light emitting elements or the like are arranged in a plane, the display unit is configured by two-dimensionally arranging lattice-shaped pixel groups formed by providing pixels in locations corresponding to three lattice points of a square lattice, respectively, and forming a space area in which no pixel exists in a location corresponding to the remaining lattice point.

First claim

What is claimed is:

1. An image display device in which plural display units are arranged in a plane, each of the display units having a plurality of pixel groups two-dimensionally arranged as a square lattice and each forming a lattice square, each pixel group having pixels provided at locations corresponding to three lattice points of the lattice square, and having a space area in which no pixel exists at a location corresponding to the other one lattice point of the lattice square, the pixel groups each being rotated in a predetermined direction by 45° around the center point of the square lattice, such that two of the pixels of a pixel group provided at locations corresponding to the three lattice points are scanned by a same scan line among plural scan lines, and only the remaining one of the three pixels in the group is scanned by a different line of the plural scan lines.

2. The image display device according to claim 1 , wherein the space areas are arranged in a staggered manner.

3. The image display device according to claim 1 , wherein the pixels provided at locations corresponding to the three lattice points are light emitting elements of R, G, and B, respectively.

4. The image display device according to claim 3 , wherein image signals corresponding to the light emitting elements of R, G, and B are separately sampled according to the spatial locations of R, G, and B, and the light emitting elements of R, G, and B are driven based on the sampled signals.

5. The image display device according to claim 4 , wherein
the light emitting element of G is provided at a location scanned by an odd-numbered line of scan lines, and
the light emitting element of B and the light emitting element of R are provided at locations scanned by an even-numbered line of the scan lines.

6. The image display device according to claim 4 , wherein
the light emitting element of G is provided at a location scanned by an even-numbered line of scan lines, and
the light emitting element of B and the light emitting element of R are provided at locations scanned by an odd-numbered line of the scan lines.

7. The image display device according to claim 1 , wherein the pixels provided at locations corresponding to the three lattice points are LED devices of a 3-in-1 system including LED chips of R, G, and B in one LED lamp.

8. The image display device according to claim 1 , wherein the pixels provided at the locations corresponding to three lattice points of the lattice square are LEDs.

9. The image display device of claim 1 , wherein the space area is blackened.

10. The image display device of claim 1 , wherein a pitch between two pixels in the same pixel group is the same as a pitch between a first pixel in one pixel group and a second pixel in an adjacent pixel group, where the first and second pixels are adjacent each another.

11. The image display device of claim 1 , wherein,
in a scan line which scans two of the pixels of a pixel group, the same two respective pixels are scanned for each pixel group scanned in that scan line, and
in a scan line which scans only one pixel of a pixel group, the same respective pixel is scanned for each pixel group scanned in that scan line.

12. The image display device according to claim 1 , wherein a maximum of two colors are scanned in each scan line.

13. A display unit for image display device, the display unit having a plurality of pixel groups two-dimensionally arranged as a square lattice and each forming a lattice square, each pixel group having pixels provided at locations corresponding to three lattice points of the lattice square, and having a space area in which no pixel exists at a location corresponding to the other one lattice point of the lattice square, the pixel groups each being rotated in a predetermined direction by 45° around the center point of the square lattice, such that the space areas of pixel groups are staggered, wherein the space areas of pixel groups which are closest to each other are offset from one another in at least one of (i) the direction of a scan line and (ii) a direction perpendicular to a scan line, and pixel groups which are closest to each other overlap one another in at least one of (i) a scanning direction or (ii) a direction perpendicular to the scanning direction.

14. The display unit for image display device according to claim 13 , wherein the pixels provided at locations corresponding to the three lattice points are light emitting elements of R, G, and B, respectively.

15. The display unit for image display device according to claim 13 , wherein the pixels provided at locations corresponding to the three lattice points are LED devices of a 3-in-1 system including LED chips of R, G, and B in one LED lamp.

16. The display unit for image display device according to claim 13 , wherein the pixels provided at the locations corresponding to three lattice points of the lattice square are LEDs.

17. The display unit for image display device according to claim 13 , wherein the space area is blackened.

18. The display unit for image display device of claim 13 , wherein a pitch between two pixels in the same pixel group is the same as a pitch between a first pixel in one pixel group and a second pixel in an adjacent pixel group, where the first and second pixels are adjacent each another.

19. A display unit for an image display device, the display unit having a plurality of pixel groups two-dimensionally arranged as a square lattice and each forming a lattice square, each pixel group having pixels provided at locations corresponding to three lattice points of the lattice square, and having a space area in which no pixel exists at a location corresponding to the other one lattice point of the lattice square, the pixel groups each being rotated in a predetermined direction by 45° around the center point of the square lattice, such that two of the pixels of a pixel group provided at locations corresponding to the three lattice points are scanned by a same scan line among plural scan lines, and only the remaining one of the three pixels in the group is scanned by a different line of the plural scan lines.

20. The display unit for an image display device of claim 19 , wherein,
in a scan line which scans two of the pixels of a pixel group, the same two respective pixels are scanned for each pixel group scanned in that scan line, and
in a scan line which scans only one pixel of a pixel group, the same respective pixel is scanned for each pixel group scanned in that scan line.

21. The image display unit according to claim 19 , wherein a maximum of two colors are scanned in each scan line.

22. An image display device in which plural display units are arranged in a plane, each of the display units having a plurality of pixel groups two-dimensionally arranged as a square lattice and each forming a lattice square, each pixel group having pixels provided at locations corresponding to three lattice points of the lattice square, and having a space area in which no pixel exists at a location corresponding to the other one lattice point of the lattice square, the pixel groups each being rotated in a predetermined direction by 45° around the center point of the square lattice, such that the space areas of pixel groups are staggered, wherein the space areas of pixel groups which are closest to each other are offset from one another in at least one of (i) the direction of a scan line and (ii) a direction perpendicular to a scan line, and pixel groups which a

Assignees

• Mitsubishi Electric Corp

Inventors

• Hara Zenichirou

Classifications

• H04N9/12

  Picture reproducers (H04N9/11 takes precedence) · CPC title

• G09G3/32

  semiconductive, e.g. using light-emitting diodes [LED] · CPC title

• F21V21/00 Primary

  Supporting, suspending, or attaching arrangements for lighting devices (F21V17/00, F21V19/00 take precedence; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q, stands for supporting apparatus or articles in general F16M11/00); Hand grips · CPC title

• G09G3/007 Primary

  Use of pixel shift techniques, e.g. by mechanical shift of the physical pixels or by optical shift of the perceived pixels · CPC title