Interactive polarization-preserving projection display
First Claim
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1. An interactive display, comprising:
- a polarization-preserving screen disposed to reflect infrared (IR) light;
a visible-light image displayed on the polarization-preserving screen;
a polarized IR light source capable of illuminating the polarization-preserving screen with a polarized IR light beam having a first polarization direction;
a polarization analyzer disposed to intercept a reflected portion of the polarized IR light beam; and
an IR sensor disposed to detect the reflected portion of the polarized IR light beam that passes through the polarization analyzer,wherein the polarization-preserving screen is a front projection screen and is polarization-preserving for IR light.
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Abstract
The disclosure generally relates to optical devices, such as interactive displays, and in particular to interactive projection displays having passive input devices. The present disclosure also provides a passive interactive input device having the ability to overcome problematic ambient interference signals in an interactive display, such as an interactive projection display.
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Citations
22 Claims
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1. An interactive display, comprising:
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a polarization-preserving screen disposed to reflect infrared (IR) light; a visible-light image displayed on the polarization-preserving screen; a polarized IR light source capable of illuminating the polarization-preserving screen with a polarized IR light beam having a first polarization direction; a polarization analyzer disposed to intercept a reflected portion of the polarized IR light beam; and an IR sensor disposed to detect the reflected portion of the polarized IR light beam that passes through the polarization analyzer, wherein the polarization-preserving screen is a front projection screen and is polarization-preserving for IR light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An interactive display, comprising:
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a polarization-preserving screen disposed to reflect infrared (IR) light; a visible-light image displayed on the polarization-preserving screen; a polarized infrared (IR) light source capable of illuminating the polarization-preserving screen with a polarized IR light beam having a first polarization direction; at least one polarization analyzer disposed to intercept a reflected portion of the polarized IR light beam; and an IR sensor disposed to detect the reflected portion of the polarized IR light beam that passes through each of the at least one polarization analyzer, wherein the polarization-preserving screen is a front projection screen and is polarization-Preserving for IR light. - View Dependent Claims (16, 17)
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18. An interactive projection system, comprising:
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a polarization-preserving reflective screen; a visible-light projector configured to display an image on the polarization-preserving reflective screen; a polarized infrared (IR) light source capable of illuminating the polarization-preserving reflective screen with a polarized IR light beam; a polarization analyzer disposed to intercept a reflected portion of the polarized IR light beam; and at least one IR sensor disposed to detect the reflected portion of the polarized IR light beam that passes through the polarization analyzer, wherein the polarization-preserving reflective screen is a front projection screen and is polarization-preserving for IR light. - View Dependent Claims (19)
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20. An interactive imaging system, comprising:
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a polarization-preserving reflective screen; a polarized infrared (IR) light source capable of illuminating a region of the polarization-preserving reflective screen with a polarized IR light beam; and at least one IR sensor disposed to intercept a plurality of reflected portions of the polarized IR light beam, wherein the polarized IR light beam comprises IR light having a first polarization direction, and the at least one IR sensor detects IR light having a second polarization direction orthogonal to the first polarization direction wherein the polarization-preserving reflective screen is a front projection screen and is polarization-preserving for IR light. - View Dependent Claims (21, 22)
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Specification