2D/3D switchable color display apparatus with narrow band emitters

• US 8,029,139 B2
• Filed: 01/29/2008
• Issued: 10/04/2011
• Est. Priority Date: 01/29/2008
• Status: Expired due to Fees

• Current Assignee: Eastman Kodak Company
• Original Assignee: Eastman Kodak Company
• Inventors: Ellinger, Carolyn R., Kane, Paul J.
• Primary Examiner(s): Legasse, Jr.; Francis M
• Application Number:
  US12/021,519
• Publication Number:
  US 20090190095A1
• Time in Patent Office: 1,344 Days
• Field of Search: 353/7, 353/8, 353/10, 353/30, 349/5, 348/750, 382/154, 359/462, 359/464, 359/465, 359/478
• 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 including a display that is a front projection or rear projection display 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 narrow band emitters having corresponding first peak emission wavelengths;

e) a second set of at least three narrow band emitters having corresponding second peak emission wavelengths which are different than the first peak emission wavelengths;

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

(g) 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 narrow band emitters;

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

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

(j) 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 of the front projection or rear projection display, thereby forming a line image of the linear array on the display surface; and

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

2. The 2D/3D switchable display of claim 1, wherein the first set of narrow band emitters has a corresponding gamut and the second set of narrow band emitters has a different gamut from the first set of narrow band 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.

3. The 2D/3D switchable display of claim 1, wherein the first set of narrow band emitters has a corresponding gamut and the second set of narrow band emitters has a different gamut from the first set of narrow band 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 narrow band emitters.

4. 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%.

5. 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%.

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

7. 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 narrow band emitters is less than 210 W/(sr·

m²).

8. 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 narrow band 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 narrow band emitters is less than 600 W/(sr·

m²).

9. The 2D/3D switchable display of claim 2 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 narrow band emitters.