2D/3D SWITCHABLE COLOR DISPLAY APPARATUS

• US 20090190095A1
• Filed: 01/29/2008
• Published: 07/30/2009
• Est. Priority Date: 01/29/2008
• Status: Active Grant

• Current Assignee: Eastman Kodak Company
• Original Assignee: Eastman Kodak Company
• Inventors: Ellinger, Carolyn R., Kane, Paul J.
• Granted Patent: US 8,029,139 B2
• Time in Patent Office: Days
• US Class Current: 353/7
• CPC Class Codes: G02B 30/23 using wavelength separation, e.g. using anaglyph techniques
• CPC Class Codes: H04N 13/324 Colour aspects
• CPC Class Codes: H04N 13/334 using spectral multiplexing
• CPC Class Codes: H04N 13/359 Switching between monoscopic and stereoscopic modes
• CPC Class Codes: H04N 13/363 using image projection screens volumetric display H04N13/388

Abstract

A 2D/3D switchable display system having a selector for selecting a two-dimensional (2D) or a three-dimensional (3D) image processing path; a first processor for processing image data through the two-dimensional image processing path; a second processor, independent of the first processor, for processing image data through the three dimensional image processing path; a first set of at least three emitters having corresponding first wavelengths; a second set of at least three emitters having corresponding second wavelengths; and a controller that during a 2D operation activates both first and second sets of emitters to present a single image, while during a 3D operation activates the first set of emitters to present a first image having one half of stereo image information and activates the second set of emitters to present a second image having a second half of stereo image information.

Claims

1. A 2D/3D switchable display system comprising:

a) a selector for selecting a two-dimensional (2D) or a three-dimensional (3D) image processing path;

b) a first processor for processing image data through the two-dimensional image processing path;

c) a second processor, independent of the first processor, for processing image data through the three dimensional image processing path;

d) a first set of at least three emitters having corresponding first wavelengths;

e) a second set of at least three emitters having corresponding second wavelengths; and

f) a controller that during a 2D operation activates both first and second sets of emitters to present a single image, while during a 3D operation activates the first set of emitters to present a first image having one half of stereo image information and activates the second set of emitters to present a second image having a second half of stereo image information.

2. The 2D/3D switchable display system of claim 1 further comprising 3D image-viewing glasses having a left eye filter set and a right eye filter set that correspond to first and second wavelengths respectively, so as to present one set of emitters to each eye of the viewer for creating stereo images.

3. The 2D/3D switchable display of claim 1, wherein the first set of emitters has a corresponding gamut and the second set of emitters has a different gamut from the first set of emitters, and during 3D operation the displayed image is mapped to a gamut within an intersection of the gamuts corresponding to the first and second emitters.

4. The 2D/3D switchable display of claim 3 wherein during 3D operation the displayed image is mapped to the entire gamut defined by the intersection of the gamuts corresponding to the first and second emitters.

5. The 2D/3D switchable display of claim 1, wherein the first set of emitters has a corresponding gamut and the second set of emitters has a different gamut from the first set of emitters, and during 2D operation the displayed image is mapped to the gamut defined by union of the corresponding gamuts for the first and second set of emitters.

6. The 2D/3D switchable display of claim 1 wherein during 2D operation the gamut of the displayed image has an intersection area with the NTSC triangle of equal to or greater than 95% and wherein the gamut of the displayed image has an intersection area with the Rec. 709 triangle of equal to or greater than 95%.

7. The 2D/3D switchable display of claim 1 wherein during 3D operation the gamut of the displayed image has an intersection area with the Rec. 709 triangle of equal to or greater than 95%.

8. The 2D/3D switchable display of claim 1 wherein the first set of at least three emitters and the second set of at least three emitters have cross-talk less than 5%.

9. The 2D/3D switchable display of claim 1 wherein the 2D power as defined by the radiance in W/(sr·

m²) needed to produce a white of 100 cd/m² using any three of the primaries is less than 210 W/(sr·

m²).

10. The 2D/3D switchable display of claim 1 wherein the 3D power as defined by the sum of the radiances in W/(sr·

m²) needed to produce a white of 100 Cd/m² using the first set of at least three emitters and the optical power in W/(sr·

m²) needed to produce the same white of 100 Cd/m² using the second set of at least three emitters is less than 600 W/(sr·

m²).

11. The 2D/3D switchable display system of claim 1, wherein the display is a flat panel display.

12. The 2D/3D switchable display system of claim 1, wherein the display is a front projection or rear projection display.

13. The 2D/3D switchable display system of claim 11, wherein the first and second sets of at least three emitters comprise a plurality of independently controlled light emitting elements.

14. The 2D/3D switchable display system of claim 13, wherein at least one light emitting element comprises inorganic core/shell quantum dots.

15. The 2D/3D switchable display system of claim 13, wherein at least one light emitting element comprises:

a first patterned electrode;

a second electrode opposed to the first electrode; and

a polycrystalline inorganic light emitting layer comprising core/shell quantum dots within a semiconductor matrix formed between the electrodes.

16. The 2D/3D switchable display system of claim 12, further comprising:

(a) at least one dichroic combiner for transmitting a first emitter color and reflecting a second emitter color toward a color combining element that directs, along an illumination axis, a colored illumination beam having, at any one time, any one of the at least six different colors defined by the first set and second set of emitters;

(b) a linear array of electromechanical grating devices for receiving the colored illumination beam along the illumination axis;

(c) an obstructing element for blocking a zeroth order light beam reflected from the linear array of electromechanical grating devices from reaching the display surface;

(d) a projection lens cooperating with a scanning element for directing at least one diffracted light beam from the linear array of electromechanical grating devices toward the display surface, thereby forming a line image of the linear array on the display surface; and

wherein the controller controls the timing of the emitters for providing image data to the linear array of electromechanical grating devices.

17. The 2D/3D switchable display system of claim 12, further comprising:

a) a first modulation system for providing a first modulated beam, said first modulation system comprising a first spatial light modulator for modulating a first incident light beam from the first set of emitters in order to form said first modulated beam according to said digital data;

(b) a second modulation system for providing a second modulated beam, said second modulation system comprising a second spatial light modulator for modulating a second incident light beam from the second set of emitters in order to form said second modulated beam according to said digital data;

(c) an optical combiner for directing said first modulated beam and said second modulated beam for projection onto a surface by a projection lens.