Device, system and method for electronic true color display

• US 6,870,523 B1
• Filed: 11/14/2000
• Issued: 03/22/2005
• Est. Priority Date: 06/07/2000
• Status: Expired due to Term

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Genoa Color Technologies Limited
• Inventors: Ben-David, Ilan, Ben-Chorin, Moshe
• Primary Examiner(s): Nguyen, Jimmy H.
• Application Number:
  US09/710,895
• Time in Patent Office: 1,589 Days
• Field of Search: 345/84, 345/85, 345/691, 345/697, 345/32, 349/5, 349/106, 349/108, 348/743, 348/544
• US Class Current: 345/84
• CPC Class Codes: G09G 2310/0235 Field-sequential colour display
• CPC Class Codes: G09G 2340/06 Colour space transformation
• 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 9/3114 by using a sequential colour filter producing one colour at a time

Abstract

A device, system and a method for displaying an expanded spectrum of colors. The present invention is suitable for various types of electronic display devices, such as televisions and monitor devices (“monitors”) for computational devices, for example. The present invention operates by electronic production of more than three primary colors. As previously described, the term “primary color” specifically does not include light as produced by a neutral filter. Thus, unlike background art systems and devices, the present invention is not limited to combinations of colors which are produced from only three primary colors, such as red, green and blue for example.

Claims

1. A device for displaying a color image comprising:

a light source to selectively produce light of at least four different,

a polychromatic source; and

a color rotating mechanism able to sequentially place at least four color filters, each color filter corresponding to one of said at least four primary colors, in the path of polychromatic light from said polychromatic source at a rotating rate equal to a rate of the frame frequency at which said color image to be displayed is to be refreshed, such that light of all of said at least four primary colors is produced in each rotation of said color rotating mechanism; and

a controller to receive image data representing said color image in terms of said at least four primary colors and, based on said image data, to produce a light pattern corresponding to said color image by selectively controlling the path of light of said at least four primary colors,

wherein at least one of said at least four primary colors is not an exact complementary of any of the other primary colors.

2. The device of claim 1 further comprising at least one optical element which projects said light pattern onto a viewing screen.

3. The device of claim 1, wherein said color rotating mechanism comprises:

a color wheel for holding said at least four color filters; and

a motor for rotating said color wheel at said rotating rate.

4. The device of claim 1 wherein the controller comprises a spatial light modulator which selectively modulates the light of said at least four primary colors in accordance with said image data.

5. The device according to claim 4, wherein said light source sequentially produces light of said at least four primary colors at said rotating rate, and wherein said spatial light modulator sequentially modulates the light of said at least four primary colors based on said color image data at said rotating rate.

6. The device of claim 4, where said spatial light modulator is selected from the group consisting of a binary modulation type and a continuous modulation type.

7. The device of claim 6, wherein said spatial light modulator is selected from the group consisting of deformable micro-mirror device (DMD), Ferroelectric liquid crystal (FLC) device, quantum well modulator, and electro-optical modulator.

8. The device of claim 6, wherein said spatial light modulator is selected from the group consisting of liquid crystal device (LCD), electro-optical modulator and magneto-optical modulator.

9. The device of claim 1, wherein said light source comprises a continuously variable neutral density filter for controlling the brightness of the light of said at least four primary colors.

10. The device of claim 1, wherein said light source selectively produces light of at least five primary colors.

11. The device of claim 10, wherein said light source selectively produces light of at least six primary colors.

12. The device of claim 1, wherein said light source additionally produces white light affecting the brightness of said image.

13. The device of claim 1 wherein said image data comprises digital image data.

14. The device of claim 1 wherein said image data comprises analog image data.

15. The device of claim 1 wherein the wavelength ranges of said at least four primary colors are selected to produce a desired color gamut for said color image.

16. A system for displaying a color image, the system comprising:

a light source to selectively produce light of at least four different non-white and non-black, primary colors, said light source comprising a polychromatic source and a color rotating mechanism able to selectively place at least four color filters, each color filter corresponding to one of said at least four primary colors, in the path of polychromatic light from said polychromatic source at a rotating rate equal to a rate of the frame frequency at which said color image to be displayed is to be refreshed, such that light of all of said at least four primary colors is produced in each rotation of said rotating mechanism;

a converter to convert three-primary-color input data representing said color image into converted image data representing said color image in terms of said at least four primary colors; and

a controller to produce a light pattern corresponding to said color image by selectively controlling the path of light of said at least four primary colors based on said converted image data,

wherein at least one of said at least four primary colors is not an exact complementary of any of the other primary colors.

17. A system according to claim 16 wherein said three-primary-color input data comprises related to red-green-blue (RGB).

18. The system of claim 16 wherein the wavelength ranges of said at least four primary colors are selected to produce a desired color gamut for said color image.

19. A method for displaying a color image comprising:

selectively producing light of at least four different, non-white and non-black primary colors;

converting three-primary-color input data representing said color image into converted image data representing said color image in terms of said at least four primary colors; and

selectively controlling the path of light of said at least four primary colors based on said converted image data to produce a light pattern corresponding to said color image,

wherein at least one of said at least four primary colors is not an exact complementary of any of the other primary colors, and wherein selectively producing the light of said at least four primary colors comprises selectively filtering polychromatic light using at least four color filters, each color filter corresponding to one of said at least four primary colors, at a rate equal to a rate of the frame frequency at which said color image be displayed is to be refreshed.

20. A method according to claim 19 wherein said three-primary-color input data comprises red-green-blue (RGB) input data.

21. The method of claim 19 wherein the wavelength ranges of said at least four primary colors are selected to produce a desired color gamut for said color image.

22. A device for projecting a color image comprising:

a light source to sequentially produce light of at least four different, non-white and non-black, primary colors, the light source comprising a polychromatic source and at least four color filters, each color filter adapted to filter polychromatic light from said polychromatic source to produce the light of one of said at least four primary colors, and a color rotating mechanism able to sequentially place said at least four color filters in the path of polychromatic light from said polychromatic source at a rotating rate equal to a rate of the fame frequency at which said color image to be displayed is to be refreshed, such that light of all of said at least four primary colors is produced in each rotation of said color rotating mechanism;

a controller to receive image data representing said color image in terms of said at least four primary colors and, based on said image data, to produce a light pattern corresponding to said color image by selectively controlling the path of light of said at least four primary colors, said controller comprising a spatial light modulator to sequentially modulate the light of said at least four primary colors in accordance with said image data; and

at least one optical element to project said light pattern,

wherein at least one of said at least four primary colors is not an exact complementary of any of the other primary colors.

23. The device of claim 22 wherein the wavelength ranges of said at least four primary colors are selected to produce a desired color gamut for said color image.

24. A device for displaying a color image comprising:

a light source comprising a polychromatic source and at least four color filters, each color filter adapted to filter polychromatic light from said polychromatic source to produce light of one of at least four different, non-white and non-black, primary colors, and a color rotating mechanism able to sequentially place said at least four color filters in the path of polychromatic light from said polychromatic source at a rotating rate equal to a rate of the frame frequency at which said color image to be displayed is to be refreshed, such that light of all of said at least four primary colors is produced in each rotation of said color rotating mechanism; and

a controller to receive image data representing said color image in terms of said at least four primary colors and, based on said image data, to produce a light pattern corresponding to said color image by selectively controlling the path of light of said at least four primary colors,

wherein at least one of said at least four primary colors is not an exact complementary of any of the other primary colors.