Infrared vision with liquid crystal display device

A technology of infrared vision and liquid crystal display, applied in nonlinear optics, input/output process of data processing, instruments, etc., can solve problems such as increasing image distortion and inappropriate aberration

Inactive Publication Date: 2012-07-18
MICROSOFT TECH LICENSING LLC
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  • Abstract
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Problems solved by technology

Additionally, such optics may add distortion, aberrations, etc. to the resulting image and may not be suitable for high quality imaging applications

Method used

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  • Infrared vision with liquid crystal display device
  • Infrared vision with liquid crystal display device
  • Infrared vision with liquid crystal display device

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Embodiment Construction

[0013] Display systems can use LCD-based technology to visually display content such as text, images, photos, movies, and the like. As described above, certain design challenges may arise when combining an LCD-based display system with a vision subsystem for optical touch detection or for otherwise optically detecting objects on or near the LCD device. The present disclosure provides a display system employing an LCD device and a smooth wavelength selective reflector positioned between the LCD device and a display backlight. The wavelength selective reflector and various other components are arranged to enable the infrared vision subsystem to "see" (detect) or image objects on or near the outside of the LCD panel without interfering with the display backlight illuminating the LCD. Various embodiments of such systems are described in more detail below.

[0014] figure 1 A block diagram of an embodiment of an example display system 100 is shown. Such a display system may be u...

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PUM

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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.

Description

Background technique [0001] Display devices may utilize various technologies for displaying images (eg, cathode ray tube (CRT) technology, projection-based technologies, liquid crystal display (LCD)-based technologies, etc.). Some display devices may also be configured to detect touches by physical objects on the display surface using techniques such as capacitive detection, resistive detection, optical detection, and the like. In some cases, the optical detection technology may also be configured to detect a "proximity touch" of a physical object located near the display surface. [0002] Computing systems that combine the functionality of a display device with optical detection, such as infrared vision subsystems, may have one or more characteristics that are compromised by integrating the two technologies. As an example, such a display system may combine a projection-based display system with a standard infrared vision subsystem; however, the use of a projection-based disp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335G02F1/13357
CPCG06F3/042G06F3/0425
Inventor K.鲍威尔刘志强P.马萨尔卡
Owner MICROSOFT TECH LICENSING LLC
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