Image display device and method of manufacturing the same

• US 20080043045A1
• Filed: 08/21/2007
• Published: 02/21/2008
• Est. Priority Date: 12/20/2001
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Tanaka, Yoshimitsu, Natori, Takehisa
• Granted Patent: US 8,648,888 B2
• Time in Patent Office: Days
• US Class Current: 345/690
• CPC Class Codes: G09F 9/33 being semiconductor devices, e.g. diodes
• 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 2310/0221 with use of split matrices G09G3/3644 and G09G3/3666 take precedence
• CPC Class Codes: G09G 2340/0457 Improvement of perceived resolution by subpixel rendering
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]
• CPC Class Codes: H01L 27/156 two-dimensional arrays

Abstract

The present invention relates to an image display device and a method of manufacturing the image display device that make it possible to form pixels with a smaller number of sub-pixels as compared with a case where one pixel is formed so as to separately include one each of sub-pixels of three colors of R, G, and B, and make full-color display by making the sub-pixels emit light by time division. The present invention can provide an image display device that makes it possible to reduce the number of sub-pixels and form pixels at a high density by sharing respective sub-pixels between pixels and displaying the sub-pixels by time division and thus realize high picture quality and reduction in the number of parts.

Claims

1. An image display device formed by arranging, in a form of a matrix, unit panels on which sub-pixels emitting colors different from each other are formed, said image display device characterized in that:

in a first pixel comprising first, second and third sub-pixels of different respective first, second, and third colors, the first sub-pixel at an edge portion of a unit panel is omitted, an adjacent sub-pixel emitting the first color in an adjacent pixel on an inner side is shared with the first pixel, and said adjacent sub-pixel emitting the first color is driven by time division, wherein each of the sub-pixels of the first pixel and the adjacent pixel lie in the same plane.

2. The image display device of claim 1, wherein the second and third sub-pixels are located on a first unit panel and the adjacent sub-pixel is located on a second unit panel separate from the first unit panel.

3. The image display device as claimed in claim 2, characterized in that:

said adjacent sub-pixel emits a color of a low visibility among said sub-pixels.

4. The image display device as claimed in claim 2, characterized in that:

said adjacent sub-pixel emits a blue color.

5. The image display device as claimed in claim 2, characterized in that:

said sub-pixel emitting the specific color is thinned out at an edge portion of one of said adjacent unit panels.

6. The image display device as claimed in claim 2, characterized in that:

said sub-pixels have a light emitting element.

7. The image display device as claimed in claim 6, characterized in that:

said light emitting element is a light emitting diode.

8. A method of manufacturing an image display device, said image display device having light emitting elements emitting different colors arranged in a form of a matrix, said method characterized by comprising:

a first transfer step for transferring said light emitting elements so as to bring said light emitting elements into a more widely spaced state than a state of said light emitting elements arranged on said first substrate, and making a temporary holding member hold said light emitting elements; and

a second transfer step for spacing said light emitting elements held by said temporary holding member more widely and transferring said light emitting elements onto said second substrate;

wherein at said second transfer step, said light emitting elements are detached from said temporary holding member by laser ablation by irradiation with laser light from an undersurface side of said temporary holding member and element suction by vacuum suction.

9. The method of manufacturing an image display device as claimed in claim 8, characterized in that:

said light emitting elements are light emitting diodes.

10. An image display device in which sub-pixels emitting colors different from each other are arranged in a form of a matrix and each pixel is formed by a plurality of sub-pixels, said image display device characterized in that:

first sub-pixels emitting a color of a highest visibility among said colors are arranged at a predetermined pitch and a second sub-pixel emitting another color is disposed between said first sub-pixels, wherein the second sub-pixel is driven with a predetermined timing; and

the image display device is adapted to drive a third sub-pixel in an adjacent pixel in place of the second sub-pixel with the predetermined timing of the second sub-pixel when said second sub-pixel does not emit the another color, the third sub-pixel having the same color as the second sub-pixel.

11. An image display device in which sub-pixels emitting colors different from each other are arranged in a form of a matrix and each pixel is formed by a plurality of sub-pixels, said image display device characterized in that:

first sub-pixels emitting a color of a highest visibility among said colors are arranged at a predetermined pitch and a second sub-pixel emitting another color is disposed between said first sub-pixels; and

each pixel is formed such that said second sub-pixel is shared by adjacent pixels and the sub-pixels are driven such that each pixel is displayed by time division;

wherein a peak brightness of said first sub-pixels is reduced and said first sub-pixels are driven on a non-time division basis.

12. An image display device in which sub-pixels emitting colors different from each other are arranged in a form of a matrix and each pixel is formed by a plurality of sub-pixels, said image display device characterized in that:

first sub-pixels emitting a color of a highest visibility among said colors are arranged at a predetermined pitch and a second sub-pixel emitting another color is disposed between said first sub-pixels; and

each pixel is formed such that said second sub-pixel is shared by adjacent pixels and the sub-pixels are driven such that each pixel is displayed by time division;

wherein the sub-pixels have a light emitting element.

13. The image display device as claimed in claim 12, characterized in that:

said light emitting element is a light emitting diode.