Monitor for showing high-resolution and three-dimensional images and method

• US 20060109753A1
• Filed: 11/22/2005
• Published: 05/25/2006
• Est. Priority Date: 11/23/2004
• Status: Abandoned Application

• Current Assignee: Fergason Patent Properties
• Original Assignee: Fergason Patent Properties
• Inventors: Fergason, James L.
• Application Number:
  US11/285,132
• Publication Number:
  US 20060109753A1
• Time in Patent Office: Days
• US Class Current: 369/30.10
• CPC Class Codes: G02B 30/25 using polarisation techniques
• CPC Class Codes: G02B 5/3066 involving the reflection of light at a particular angle of incidence, e.g. Brewster's angle
• CPC Class Codes: H04N 13/337 using polarisation multiplexing
• CPC Class Codes: H04N 13/346 using prisms or semi-transparent mirrors
• CPC Class Codes: H04N 13/398 Synchronisation thereof; Control thereof

Abstract

A display system or monitor arrangement and method for stereoscopic displaying of images includes a pair of displays for providing respective left eye and right eye images and arranged in intersecting planes, a polarization sensitive beam splitter for combining the images from the displays in a common light path, and a viewing device to discriminate between respective images to present the respective left and right eye images to the eyes of a viewer for viewing. The polarization sensitive beam splitter preferentially reflects or transmits light based on polarization direction of the incident light thereon. A control tunes the intensity of light from the displays to balance the intensity thereof. Twisted nematic liquid crystal cells may be used as the displays, and optical retarders may be used in respective optical channels to rotate the plane of polarization of light and to compensate for optical dispersion.

Claims

1. A display system, comprising

a pair of displays, each operable to provide respective images,

a beam splitter, the beam splitter having optical polarization characteristics to provide different light transmission and light reflection effect based on optical polarization of light incident on the beam splitter,

the displays and beam splitter being positionally related such that the beam splitter transmits light from one display and reflects light from the other display whereby the transmitted and reflected light are provided via the beam splitter in substantially the same direction, and

wherein light that is incident on the beam splitter representing images that are provided by the displays is optically polarized in coordination with the optical polarization characteristics of the beam splitter.

2. The display system of claim 1, wherein the optical polarization characteristics for the beam splitter are such that for one direction of plane polarized light a greater percentage of light is reflected than for the orthogonal direction of plane polarized light.

3. The display system of claim 1, wherein the beam splitter is a Brewster angle device.

4. The display system of claim 1, wherein the beam splitter is a polarizing beam splitter.

5. The display system of claim 1, wherein the beam splitter is comprised of a number of dielectric layers.

6. The display system of claim 1, wherein the beam splitter comprises indium tin oxide.

7. The display system of claim 6, wherein the indium tin oxide has a thickness of a critical wavelength of light divided by two.

8. The display system of claim 1, wherein the beam splitter comprises titanium dioxide.

9. The display system of claim 8, wherein the titanium dioxide has a thickness of a critical wavelength of light divided by two.

10. The display system of claim 1, wherein the displays are liquid crystal displays that provide images formed by plane polarized light, and the plane of polarization of the light representing images from the respective displays as incident on the beam splitter are orthogonal to each other, whereby the beam splitter preferentially transmits light from one display and preferentially reflects light from the other display.

11. The display system of claim 10, wherein the direction of polarization of light that is more strongly reflected by the beam splitter and less strongly transmitted by the beam splitter is in the plane of the beam splitter.

12. The display system of claim 1, wherein the displays are liquid crystal displays that provide images formed by plane polarized light, and the plane of polarization of light from the respective displays is the same relative to the beam splitter, and further comprising a wave plate between one display and the beam splitter to rotate the plane of polarization of light from that display prior to impingement on the beam splitter, whereby the beam splitter preferentially transmits light from one display and preferentially reflects light from the other display.

13. The display system of claim 1, wherein the displays are twisted nematic liquid crystal displays that have substantially the same optical characteristics including the direction of plane of polarization of plane polarized light therefrom, the planes of the displays and the beam splitter being substantially parallel to a common generally linear axis, an optical retarder to rotate by ninety degrees the plane of polarization of light from one of the displays prior to impingement of such light on the beam splitter.

14. The display system of claim 13, further comprising a viewing device, including plane polarizers that have the same direction of polarization for transmitting light having such polarization direction, and an optical retarder optically upstream of one of the plane polarizers to rotate the plane of polarized light incident on such polarizer by ninety degrees, the plane polarizers of the viewing device being oriented such that the plane polarizer having the optical polarizer optically upstream thereof transmits light from the display that does not have an optical retarder between the display and the beam splitter.

15. A display method, comprising directing respective images to a beam splitter that has optical polarization characteristics to provide different light transmission and light reflection effect based on optical polarization of light incident on the beam splitter, wherein the displays and beam splitter are positionally related such that the beam splitter transmits light from one display and reflects light from the other display whereby the transmitted and reflected light are provided via the beam splitter in substantially the same direction, and wherein light that is incident on the beam splitter representing images that are provided by the displays is optically polarized in coordination with the optical polarization characteristics of the beam splitter.

17. The method of claim 15, further comprising using the beam splitter to reflect light and to transmit light along a substantially common light path.

18. The method of claim 17, further comprising directing plane polarized light to the beam splitter, and using the beam splitter to reflect to the substantially common light path light that has a direction of plane of polarization that is generally parallel to the plane of the beam splitter and to transmit light to the substantially common light path light that has a direction of plane of polarization that is generally perpendicular to the plane of the beam splitter.

16. A method of display including providing respective images using light having optical polarization characteristics to a beam splitter that has optical polarization characteristics to provide different light transmission and light reflection effect based on optical polarization of light incident on the beam splitter, wherein the beam splitter transmits light representing one image and reflects light representing the other image.

19. A system for images, comprising

a polarizing beam splitter receiving respective images, which have plane polarized light characteristics, along respective first and second light paths and directing the images to a common light path by reflection and transmission substantially without changing the direction of optical polarization,

a viewer to receive the images in the common light path to discriminate the images based on plane polarized light characteristics, the viewer having first and second viewing channels to provide for viewing the images from the first and second light paths, respectively, wherein the viewer includes a pair of plane polarizers having the same polarization direction,

a first optical retarder introducing optical retardation in one light path optically upstream of the beam splitter to rotate the plane of polarization of light in the one light path to a crossed relation relative to light from the other light path, and

a second optical retarder introducing optical retardation in the second viewing channel to rotate the plane of polarization of light to a crossed relation to light in the first viewing channel and to compensate for dispersion by the first optical retarder.

20. The system of claim 19, said retarders comprising half wave plates.

21. The system of claim 19, further comprising liquid crystal displays providing images to the beam splitter, and wherein the displays are oriented at an angle relative to each other and are generally parallel to a common axis, and the beam splitter is oriented in a plane that is generally parallel to the axis and is at the bisectrix of the angle.

22. A display system, comprising

a pair of liquid crystal displays,

a polarization sensitive beam splitter,

the displays and beam splitter being relatively positioned such that light from one display is reflected by the beam splitter in a first direction and light from the other display is transmitted by the beam splitter in substantially the same direction, and

wherein the beam splitter is a polarizing beam splitter that has increased transmission or reflection for one direction of polarization of light incident thereon.

23. The display system of claim 22, wherein the beam splitter comprises a light transmissive plate having a coating of indium tin oxide or of titanium dioxide thereon.

24. The display system of claim 22, further comprising a control to tune the intensity of light from at least one of the displays.

25. The display system of claim 24, wherein the control further comprises a sensor responsive to light in the common light path to detect the intensity thereof and to provide an automatic adjustment of the intensity of light from at least one of the displays.

26. A display method, comprising using a polarization sensitive beam splitter to transmit and to reflect in a common light path respective images that have crossed optical plane polarization such that the beam splitter that has increased transmission or reflection for one direction of polarization of light incident thereon relative to the other direction of polarization of light.

27. The display method of claim 26, further comprising adjusting the intensity of light representing at least one of the images incident on the beam splitter.

28. The display method of claim 27, said adjusting comprising tuning at least one of the displays substantially to balance the intensity of light representing the respective images in the common light path.

29. The display method of claim 28, further comprising sensing the intensity of light in the common light path and said adjusting comprising automatically adjusting.