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US 9,285,635 B2Granted
Stereoscopic flat panel display with updated blanking intervals
AssigneeRealD Inc.
InventorsMichael G. Robinson, Jianmin Chen
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Abstract
This disclosure describes stereoscopic flat panel display systems based on the polarization encoding of sequentially displayed left and right eye images. The systems comprise line-by-line addressed liquid crystal display (LCD) panels, illuminating back light units and polarization control panels (PCPs). Right and left eye images are written sequentially onto the LCD whose polarization is controlled by a substantially synchronously driven PCP. The backlight may be continuously illuminated, or modulated temporally, spatially or both, as can the PCP.
Claims20
A flat panel display operable to display stereoscopic imagery, comprising:
- a backlight operable to selectively provide light;
- a liquid crystal (LC) modulation panel positioned to receive the light incident from the backlight and operable to modulate the light incident from the backlight;
- and
- a polarization control panel (PCP) positioned to receive the modulated light incident from the LC modulation panel and operable to selectively transform the state of polarization (SOP) of the modulated light incident from the LC modulation panel in synchronization with the backlight and LC modulation panel;
- wherein the flat panel display has at least two operating states, comprising:
- a presentation state in which the backlight provides light to the LC modulation panel, in which the PCP operates in one of a right-eye polarization mode and a left-eye polarization mode, wherein when the PCP operates in the left-eye polarization mode the LC modulation panel operates in a left-eye image mode, and wherein when the PCP operates in the right-eye polarization mode the LC modulation panel operates in a right-eye image mode;
- and
- a transition state in which the backlight does not provide light to substantially any portion of the LC modulation panel when the LC modulation panel changes between the left-eye and right-eye image modes, and when the PCP transitions between the left-eye and the right-eye polarization modes;
- wherein the right-eye polarization mode comprises altering the light to circularly polarized light capable of being analyzed by a right-eye analyzer.
6 more elements
A flat panel display operable to display stereoscopic imagery, comprising:
- a backlight operable to selectively provide light;
- a liquid crystal (LC) modulation panel positioned to receive the light incident from the backlight and operable to modulate the light incident from the backlight;
- and
- a polarization control panel (PCP) positioned to receive the modulated light incident from the LC modulation panel and operable to selectively transform the state of polarization (SOP) of the modulated light incident from the LC modulation panel in synchronization with the backlight and LC modulation panel;
- wherein the flat panel display has at least two operating states, comprising:
- a presentation state in which the backlight provides light to the LC modulation panel, in which the PCP operates in one of a right-eye polarization mode and a left-eye polarization mode, wherein when the PCP operates in the left-eye polarization mode the LC modulation panel operates in a left-eye image mode, and wherein when the PCP operates in the right-eye polarization mode the LC modulation panel operates in a right-eye image mode;
- and
- a transition state in which the backlight does not provide light to substantially any portion of the LC modulation panel when the LC modulation panel changes between the left-eye and right-eye image modes, and when the PCP transitions between the left-eye and the right-eye polarization modes;
- and
- wherein the right-eye polarization mode comprises a mode in which the PCP transforms the SOP of the modulated light into opposite handed circular polarized light for a certain design wavelength, and wherein the left-eye polarization mode comprises a mode in which the PCP transforms the SOP of the modulated light into opposite handed circular polarized light for the certain design wavelength.
7 more elements
A method for displaying stereoscopic imagery on a flat panel display having a backlight, a liquid crystal (LC) modulation panel and a polarization control panel (PCP), the method comprising:
- presenting stereoscopic imagery in a presentation state comprising:
- providing light from the backlight to the LC modulation panel;
- providing modulated light from the LC modulation panel to the PCP;
- operating the PCP in one of a right-eye polarization mode and a left-eye polarization mode, wherein when the PCP operates in the left-eye polarization mode the LC modulation panel operates in a left-eye image mode, and wherein when the PCP operates in the right-eye polarization mode the LC modulation panel operates in a right-eye image mode;
- and
- transitioning between left-eye and right-eye views in a transition state comprising:
- not providing light from the backlight to substantially any portion of the LC modulation panel when the LC modulation panel changes between the left-eye and right-eye image modes, and when the PCP transitions between the left-eye and the right-eye polarization modes;
- wherein operating the PCP in the right-eye polarization mode comprises altering the light to linearly polarized light capable of being analyzed by a right-eye analyzer.
5 more elements
Dependencies are inferred from the claim text.