Field-sequential color image display apparatus and method with reduced color breakup

• US 6,392,656 B1
• Filed: 05/19/1999
• Issued: 05/21/2002
• Est. Priority Date: 05/20/1998
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Someya, Jun, Shikama, Shinsuke
• Primary Examiner(s): Brier, Jeffery
• Assistant Examiner(s): HAVAN, THU THAO
• Application Number:
  US09/314,143
• Time in Patent Office: 1,098 Days
• Field of Search: 345/150, 345/151, 345/152, 345/153, 345/589, 345/591, 345/592, 345/593, 345/597, 345/600, 345/603, 345/604, 345/605, 345/549, 345/690, 345/3.2, 345/22, 345/72, 345/83, 345/88, 345/89, 348/268, 348/269, 348/263, 348/34, 348/223, 348/742, 348/743, 353/31
• US Class Current: 345/589
• CPC Class Codes: G09G 2310/0235 Field-sequential colour display
• CPC Class Codes: G09G 2340/06 Colour space transformation
• CPC Class Codes: G09G 3/2022 using sub-frames
• CPC Class Codes: G09G 3/3413 Details of control of colour illumination sources
• CPC Class Codes: G09G 5/02 characterised by the way in which colour is displayed details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607
• CPC Class Codes: H04N 9/30 using solid-state colour display devices

Abstract

A field-sequential color image display device receives red, green, and blue image data, and decomposes the received data into more than three monochromatic images. The monochromatic images may include at least two red, two green, and two blue images. Alternatively, the monochromatic images may include one white image and at least one red, one green, and one blue image. The monochromatic images are displayed sequentially, each monochromatic image followed by another monochromatic image of a different color. The increased number of monochromatic images alleviates the problem of color breakup.

Claims

1. A field-sequential color image display device for displaying a color image by sequentially displaying monochromatic images of different colors, comprising:

a data decomposing means receiving image data for three primary-color components of one full-color image, including one red component, one green component, and one blue component, and decomposing the received image data to generate one white monochromatic image, at least one red monochromatic image, at least one green monochromatic image, and at least one blue monochromatic image; and

a display means coupled to said data decomposing means, displaying the monochromatic images generated by said data decomposing means sequentially, in a predetermined order.

2. The field-sequential color image display device of claim 1, wherein said display means comprises:

a monochromatic display device displaying said white monochromatic image, said red monochromatic image, said green monochromatic image, and said blue monochromatic image as white displayed images; and

a colorizing device converting the white displayed images representing said red monochromatic image, said green monochromatic image, and said blue monochromatic image to a red displayed image, a green displayed image, and a blue displayed image, respectively.

3. The field-sequential color image display device of claims 1, wherein said data decomposing means comprises an achromatic component separating means generating one said white monochromatic image, one said red monochromatic image, one said green monochromatic image, and one said blue monochromatic image.

4. The field-sequential color image display device of claim 3, wherein said data decomposing means further comprises a luminance data decomposer generating a plurality of red monochromatic images from said one red monochromatic image, a plurality of green monochromatic images from said one green monochromatic image, and a plurality of blue monochromatic images from said one blue monochromatic image, said display means displaying the red, green, and blue monochromatic images generated by said luminance data decomposer.

5. A method of displaying a color image by displaying successive monochromatic images in different primary colors, said method comprising:

receiving an image data corresponding to a full-color image, said image data containing information about plural picture elements, the information being an M-bit integer per picture element, the signal also containing information about three different primary color components of the full-color image;

decomposing said image data to generate plural monochromatic images including N first primary color monochromatic images, N second primary color monochromatic images, and N third primary color monochromatic images, said first and second and third primary colors being different, N being an integer greater than one but not greater than M, said decomposing including dividing said M bits per picture element for each primary color component into N groups of bits, said dividing depending on the bits forming each individual M bits; and

displaying said plural monochromatic images in sequence.

6. The method of claim 5, wherein said first primary color is red, said second primary color is green, and said third primary color is blue.

7. The method of claim 5, wherein said dividing includes dividing said each individual M bits into N groups of bits in ascending order of significance.

8. The method of claim 5, wherein said integer N is equal to 2 and said integer M is greater than N, and said dividing includes dividing said each individual M bits into even and odd bits.

9. The method of claim 5, wherein said integer N is greater than 2 and said integer M is greater than N, and said dividing includes dividing said each individual M bits into a group of most significant bits and a group of least significant bits.

10. A method of displaying a color image by displaying successive monochromatic images in different colors, comprising the steps of:

receiving image data for three primary-color components of one full-color image, including one first primary component, one second primary component, and one third primary component;

decomposing said image data to generate more than three monochromatic images, wherein said monochromatic images include one white monochromatic image, one first primary component monochromatic image, one second primary component monochromatic image, and one third primary component monochromatic image; and

displaying said generated monochromatic images sequentially.

11. The method of claim 10, wherein said monochromatic images include one white monochromatic image, one red monochromatic image, one green monochromatic image, and one blue monochromatic image.

12. The method of claim 11, wherein said monochromatic images include one white image, N red monochromatic images, N green monochromatic images, and N blue monochromatic images, N being an integer greater than one.

13. A field-sequential color image display device for displaying a color image by sequentially displaying monochromatic images of primary colors, said image display device comprising:

an input receiving an image data corresponding to a full-color image, said image data containing information about plural picture elements, the information being an M-bit integer per picture element, the signal also containing information about three different primary color components of the full-color image;

a processor operatively coupled to said input, said processor decomposing said image data to generate plural monochromatic images including N first primary color monochromatic images, N second primary color monochromatic images, and N third primary color monochromatic images, said first and second and third primary colors being different, N being an integer greater than one but not greater than M, said processor dividing said M bits per picture element for each primary color component into N groups of bits, said dividing depending on the bits forming each individual M bits; and

a display component operatively coupled to said processor, said display component displaying said plural monochromatic images in sequence.

14. The image display device according to claim 13, wherein said first primary color is red, said second primary color is green, and said third primary color is blue.

15. The field-sequential color image display device of claim 14, wherein said display component includes:

a monochromatic display device displaying said red monochromatic images, said green monochromatic images, and said blue monochromatic images as white images; and

a colorizing device converting said white images to red displayed images, green displayed images, and blue displayed images in said predetermined order.

16. The field-sequential color image display device of claim 15, wherein said colorizing device includes a color filter wheel.

17. The image display device according to claim 13, wherein said processor divides said each individual M bits into N groups of bits in ascending order of significance.

18. The image display device according to claim 13, wherein said integer N is equal to 2 and said integer M is greater than N, and said processor divides said each individual M bits into even and odd bits.

19. The image display device according to claim 13, wherein said integer N is greater than 2 and said integer M is greater than N, and said processor divides said each individual M bits into a group of most significant bits and a group of least significant bits.

20. A field-sequential color image display device for displaying a color image by sequentially displaying monochromatic images of primary colors, said image display device comprising:

an input receiving image data for three primary-color components of one full-color image, including one first primary component, one second primary component, and one third primary component;

a processor operatively coupled to said input, said processor decomposing said image data to generate more than three monochromatic images, wherein said monochromatic images include one white monochromatic image, one first primary component monochromatic image, one second primary component monochromatic image, and one third primary component monochromatic image; and

a display component operatively coupled to said processor, said display component displaying said generated monochromatic images sequentially.

21. The image display device according to claim 20, wherein said monochromatic images generated by said processor include one white monochromatic image, one red monochromatic image, one green monochromatic image, and one blue monochromatic image.

22. The image display device according to claim 21, wherein said monochromatic images generated by said processor include one white image, N red monochromatic images, N green monochromatic images, and N blue monochromatic images, N being an integer greater than one.