Image display device and method of manufacturing the same

• US 8,648,888 B2
• Filed: 08/21/2007
• Issued: 02/11/2014
• Est. Priority Date: 12/20/2001
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Natori, Takehisa, Tanaka, Yoshimitsu
• Primary Examiner(s): Moon, Seokyun
• Application Number:
  US11/894,534
• Publication Number:
  US 20080043045A1
• Time in Patent Office: 2,366 Days
• Field of Search: None
• US Class Current: 345/694
• 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:

a first unit panel of the unit panels comprises a first pixel comprising first, second and third sub-pixels of different respective first, second, and third colors, and a second pixel adjacent to the first pixel and directly adjacent a first edge of the unit panel, the second pixel comprising a fourth sub-pixel of the first color, a fifth sub-pixel of the second color, and the third sub-pixel, which is shared with the first pixel,

wherein the third sub-pixel is driven by time division,

wherein the second color is of the highest visibility relative to the first and third colors and wherein the fifth sub-pixel of the second color is positioned closest to the first edge relative to the fourth and third sub-pixels, and

wherein each of the sub-pixels of the first pixel and the second pixel lie in the same plane.

8. The image display device of claim 1, wherein sub-pixels of the first pixel are driven so as to be illuminated simultaneously and sub-pixels of the second pixel are driven so as to be illuminated simultaneously.

9. The image display device of claim 1, wherein the image display device is configured such that for pixels of the unit panel that are not directly adjacent the first edge, sub-pixel sharing does not occur.

2. 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 comprising:

a first unit panel of the unit panels comprising a first portion of a first pixel directly adjacent a first edge of the first unit panel, the first portion of the first pixel comprising a first sub-pixel of a first color and a second sub-pixel of a second color; and

a second unit panel of the unit panels, the second unit panel being separate from the first unit panel and comprising a second portion of the first pixel, the second portion of the first pixel comprising a shared third sub-pixel of a third color, and a second pixel directly adjacent to a second edge of the second unit panel, the second pixel comprising a fourth sub-pixel of the first color, a fifth sub-pixel of the second color and the shared third sub-pixel of a third color;

wherein the third sub-pixel is driven by time division so as to be shared between the first and second pixels;

wherein the third sub-pixel is displaced from the second edge of the second unit panel by at least one sub-pixel; and

wherein each of the sub-pixels of the first pixel and the second pixel lie in the same plane.

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

said shared third sub-pixel emits a color of a low visibility among said sub-pixels of the first and second pixels.

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

said third color is blue.

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

sub-pixels of the third color are thinned out at an edge portion of the first unit panel.

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

each of said first, second, third, fourth, fifth and sixth sub-pixels has 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.

10. The image display device of claim 2, wherein the second color is of the highest visibility relative to the first and third colors and wherein the second sub-pixel of the second color is positioned closer to the first edge than the first sub-pixel.

11. The image display device of claim 2, wherein the image display device is configured such that for pixels of the first unit panel that are not directly adjacent the first edge, sub-pixel sharing does not occur.

12. The image display device of claim 2, further comprising circuitry configured to drive the first pixel separately from the second pixel.