INFRARED VISION WITH LIQUID CRYSTAL DISPLAY DEVICE
First Claim
1. A display system, comprising:
- a liquid crystal display device;
a display backlight configured to illuminate the liquid crystal display device by directing visible light toward an interior surface of the liquid crystal display device; and
a wavelength-selective reflector disposed between the display backlight and the liquid crystal display device and having a smooth surface facing the interior surface of the liquid crystal display device, where the wavelength-selective reflector has a wavelength-selective coating configured to cause incident visible light from the display backlight to be transmitted through the wavelength-selective reflector to the liquid crystal display device, and cause incident infrared light reflected from an object on or near an exterior surface of the liquid crystal display device to be reflected off of the wavelength-selective reflector and directed to an infrared vision subsystem.
2 Assignments
0 Petitions
Accused Products
Abstract
Various embodiments related to infrared vision for a liquid crystal display (LCD) device are disclosed herein. For example, one disclosed embodiment provides a display system, comprising an LCD device and a display backlight configured to illuminate the LCD device by directing visible light toward an interior surface of the LCD device. The display system further comprises a wavelength-selective reflector disposed between the display backlight and the LCD device and having a smooth surface facing the interior surface of the LCD device, where the wavelength-selective reflector has a wavelength-selective coating configured to cause incident visible light from the display backlight to be transmitted through the wavelength-selective reflector to the LCD device, and cause incident infrared light reflected from an object on or near an exterior surface of the LCD device to be reflected off of the wavelength-selective reflector and directed to an infrared vision subsystem.
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Citations
20 Claims
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1. A display system, comprising:
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a liquid crystal display device; a display backlight configured to illuminate the liquid crystal display device by directing visible light toward an interior surface of the liquid crystal display device; and a wavelength-selective reflector disposed between the display backlight and the liquid crystal display device and having a smooth surface facing the interior surface of the liquid crystal display device, where the wavelength-selective reflector has a wavelength-selective coating configured to cause incident visible light from the display backlight to be transmitted through the wavelength-selective reflector to the liquid crystal display device, and cause incident infrared light reflected from an object on or near an exterior surface of the liquid crystal display device to be reflected off of the wavelength-selective reflector and directed to an infrared vision subsystem. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A display system, comprising:
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a liquid crystal display device; a display backlight configured to illuminate the liquid crystal display device by directing visible light toward an interior surface of the liquid crystal display device; a dichroic mirror disposed between the display backlight and the liquid crystal display device and having a smooth surface facing the interior surface of the liquid crystal display device, where the dichroic mirror has a wavelength-selective coating configured to cause incident visible light from the display backlight to be transmitted through the dichroic mirror to the liquid crystal display device, and cause incident infrared light reflected from an object on or near an exterior surface of the liquid crystal display device to be reflected off of the dichroic mirror; and an offset infrared vision subsystem disposed outside of all straight-line optical paths occurring between corresponding operative portions of the display backlight and the liquid crystal display device, the offset infrared vision subsystem including an image sensor configured to receive infrared light directed from the dichroic mirror, the image sensor being positioned laterally offset from an optical axis of infrared light incident on the image sensor. - View Dependent Claims (13, 14)
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15. A display system of a surface computing system, the display system comprising:
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a liquid crystal display device; a display backlight configured to illuminate the liquid crystal display device by directing visible light toward an interior surface of the liquid crystal display device; an infrared illumination system configured to direct infrared light toward an object on or near an exterior surface of the liquid crystal display device; a wavelength-selective reflector disposed between the display backlight and the liquid crystal display device and having a smooth surface facing the interior surface of the liquid crystal display device, where the wavelength-selective reflector has a wavelength-selective coating configured to cause incident visible light from the display backlight to be transmitted through the wavelength-selective reflector to the liquid crystal display device, and cause incident infrared light reflected from the object on or near the exterior surface of the liquid crystal display device to be reflected off of the wavelength-selective reflector; a switchable diffuser disposed adjacent to the exterior surface of the liquid crystal display device and configured to aid in one or more of infrared illumination of the object and backlight uniformity; and an infrared vision subsystem disposed outside of all straight-line optical paths occurring between corresponding operative portions of the display backlight and the liquid crystal display device, the infrared vision subsystem including an image sensor configured to receive infrared light directed from the wavelength-selective reflector. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification