Display device

• US 8,497,957 B2
• Filed: 07/13/2010
• Issued: 07/30/2013
• Est. Priority Date: 06/19/2006
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Nakamura, Kozo, Ueki, Shun, Taguchi, Tokio, Itou, Akiko
• Primary Examiner(s): KIM, RICHARD H
• Application Number:
  US12/835,052
• Publication Number:
  US 20100277677A1
• Time in Patent Office: 1,113 Days
• Field of Search: 349/109
• US Class Current: 349/109
• CPC Class Codes: G02B 5/201 in the form of arrays
• CPC Class Codes: G02B 5/23 Photochromic filters
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/134345 Subdivided pixels, e.g. for grey scale or redundancy
• CPC Class Codes: G02F 2201/52 RGB geometrical arrangements
• 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 2300/0456 with a reflective area and a transmissive area combined in one pixel, such as in transflectance pixels
• CPC Class Codes: G09G 2320/041 Temperature compensation
• CPC Class Codes: G09G 2340/06 Colour space transformation
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 5/026 Control of mixing and/or overlay of colours in general G09G5/022 and G09G5/024 take precedence
• CPC Class Codes: H01J 2211/42 Fluorescent layers
• CPC Class Codes: H01J 2329/30 Shape or geometrical arrangement of the luminescent material
• CPC Class Codes: H04N 9/30 using solid-state colour display devices
• CPC Class Codes: H10K 59/351 comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]

Abstract

A display device in which an image with a wide color reproduction range and bright red can be displayed is provided. The display device is a display device such as, for example, a liquid crystal display device, a cathode ray tube, an organic electroluminescent display device, a plasma display panel, and a field emission display. The display device includes a display surface including a pixel having red, green, blue, and yellow sub-pixels, wherein the red sub-pixel preferably has the largest aperture area.

Claims

1. A display device comprising:

a display surface including a pixel having red, green, blue, and yellow sub-pixels;

wherein

the red sub-pixel has a larger aperture area than an aperture area of the green sub-pixel, an aperture area of the blue sub-pixel, and an aperture area of the yellow sub-pixel; and

a lightness value of red light displayed by the pixel is between 12% and 25% of a lightness value of white light displayed by the pixel.

2. The display device according to claim 1, wherein the green, the blue, and the yellow sub-pixels have the same size aperture area.

3. The display device according to claim 1, wherein the pixel includes a sub-pixel having an aperture area that is smaller than an aperture area of the blue sub-pixel.

4. The display device according to claim 1, wherein the green sub-pixel has the smallest aperture area.

5. The display device according to claim 1, wherein the yellow sub-pixel has the smallest aperture area.

6. A display device comprising:

a display surface including a pixel having red, green, blue, and yellow sub-pixels;

wherein

the yellow sub-pixel has the smallest aperture area;

a lightness value of red light displayed by the pixel is between 12% and 25% of a lightness value of white light displayed by the pixel; and

the pixel includes a sub-pixel that has an aperture area that is larger than an aperture area of the blue sub-pixel.

7. The display device according to claim 6, wherein, in the pixel, the red and green sub-pixels have the largest aperture area.

8. The display device according to claim 7, wherein, in the pixel, there is a same number of the red and green sub-pixels that is greater than a number of either of the yellow or the blue sub-pixels.

9. The display device according to claim 8, wherein the pixel includes green sub-pixels having different color characteristics.