摘要:
Phase retardation compensation can be achieved in liquid crystal-on-silicon imagers by stress freezing a photoelastic medium. As a result, a simple, one-piece compensator for the residual birefringence of the imagers may be provided in some cases. The stress may be frozen by subjecting a photoelastic material to a desired stress and temperature regime, resulting in a material which exhibits birefringence due to a stress level which is fixed or frozen at the molecular level within the material.
摘要:
A projection display may be formed by an imager which creates a portion of each of a plurality of spatially separated segments which together make up an overall image. The imager may produce one of those segments at any given instant of time. That segment is then replicated to fill each of the segments that form the overall image area. However, the segments that correspond to locations where that image portion should not exist are filtered out so that only one image portion for the correct segment is displayed. Each of the other segments may be produced in a time sequential fashion so that sequentially the segments fill the entire image. Thus, using this technique, substantially higher resolution may be achieved from a projection display system using fewer number of pixels in the microdisplay, in some embodiments.
摘要:
Some embodiments describe techniques that may relate to switching of display refresh rates. In one embodiment, modification of a display refresh rate may be initiated after the last pixel of a portion of a first image frame is driven. Other embodiments are also described.
摘要:
An apparatus may include a backlight for illuminating a liquid crystal display and a control module for controlling the illumination of the backlight. The control module may alternate between turning the backlight on and off at a first frequency and turning the backlight on and off at a second frequency.
摘要:
Some embodiments describe techniques that relate to power efficient, high frequency displays with motion blur mitigation. In one embodiment, the refresh rate of a display device may be dynamically modified, e.g., to reduce power consumption and/or reduce motion blur. Other embodiments are also described.
摘要:
Real human detection and confirmation in personal credential verification is described. In one example, a camera image of a user is received at a computer system. The image is tested for recognition against a user account and it is confirmed that the image corresponds to a real human. If the image is authenticated and corresponds to a real human, then the user is authenticated to the corresponding user account of the computer system.
摘要:
Embodiments of an optical detection apparatus are disclosed which may include one or more of a waveguide, a trench formed in the waveguide, a reflective surface, and a photodetector. The waveguide may be formed in a semiconductor substrate to propagate an optical signal received at a first end of the waveguide. The trench may also be formed in the waveguide having a first sidewall and a second sidewall, the first and second sidewalls forming first and second angles with the waveguide's propagation direction. The second sidewall may include a reflective surface formed thereon. The photodetector may be configured to receive an optical signal propagated in the waveguide, through the first sidewall and reflected from the reflective surface on the second sidewall.
摘要:
Embodiments of an optical detection apparatus are disclosed which may include one or more of a waveguide, a trench formed in the waveguide, a reflective surface, and a photodetector. The waveguide may be formed in a semiconductor substrate to propagate an optical signal received at a first end of the waveguide. The trench may also be formed in the waveguide having a first sidewall and a second sidewall, the first and second sidewalls forming first and second angles with the waveguide's propagation direction. The second sidewall may include a reflective surface formed thereon. The photodetector may be configured to receive an optical signal propagated in the waveguide, through the first sidewall and reflected from the reflective surface on the second sidewall.
摘要:
Some embodiments provide a device including a first material associated with a controllable refractive index, a second material associated with a first refractive index, and a third material disposed between the first material and the second material, the third material being substantially transparent to a plurality of visible light wavelengths and being associated with a second refractive index greater than the first refractive index. Devices according to some embodiments may be employed as a display in a laptop computer, a desktop computer, a personal digital assistant, a minicomputer, a projection television, a front projector, etc.
摘要:
Some embodiments provide a device including a first material associated with a controllable refractive index, a second material associated with a first refractive index, and a third material disposed between the first material and the second material, the third material being substantially transparent to a plurality of visible light wavelengths and being associated with a second refractive index greater than the first refractive index. Devices according to some embodiments may be employed as a display in a laptop computer, a desktop computer, a personal digital assistant, a minicomputer, a projection television, a front projector, etc.