摘要:
Methods and apparatus are provided for encoding and decoding image data using localized gamut definitions. The localized gamut definitions may be defined based on gamut characteristics of the image data. A gamut transform is applied to the image data wherein color coordinates specified by the image data are mapped to corresponding color coordinates in the localized gamut definition. Use of localized gamut definitions may facilitate image data compression of increased color depth specification of image data.
摘要:
A display has a screen which incorporates a light modulator. The screen may be a front projection screen or a rear-projection screen. The screen is illuminated with light from an illuminator comprising an array of individually-controllable light sources. The light sources and elements of the light modulator may be controlled to adjust the intensity and frequency of light emanating from corresponding areas on the screen. The display may be calibrated to compensate for differences in intensities of the light sources.
摘要:
In one embodiment the present invention includes a display system for displaying video. The display system includes a backlight layer and an LCD layer. The display system controls the backlight layer and the LCD layer to emulate a cathode ray tube response. This emulation may be accomplished by applying a gamma function to a gamma corrected input signal. In this manner, the effects resulting from the “crushed blacks” phenomenon may be reduced.
摘要:
Chromaticity of light output by a light-emitting diode, such as a light-emitting diode (LED), is adjusted while maintaining a brightness of the illumination source substantially constant by adjusting a drive schema for the illumination source. A driver for LEDs or other light-emitting diodes provides for varying a drive schema to adjust chromaticity of driven LEDs.
摘要:
A display has a screen which incorporates a light modulator. The screen may be a front projection screen or a rear-projection screen. The screen is illuminated with light from an illuminator comprising an array of individually-controllable light sources. The light sources and elements of the light modulator may be controlled to adjust the intensity and frequency of light emanating from corresponding areas on the screen. The display may be calibrated to compensate for differences in intensities of the light sources.
摘要:
Approximation errors commonly occur when color transformation values stored in color look-up tables are interpolated to produce color display drive signals, since the stored transformation values typically correspond to non-linear functions. Such errors can be reduced by applying a pre-indexing function to the transformation values before they are stored in the look-up table, and by applying the same function to values extracted from the table during look-up operations. Alternatively, such errors can be reduced by providing one or more additional look-up tables to achieve higher order (i.e. more accurate) interpolation results that are achievable by interpolation of values stored in a single look-up table.
摘要:
A display including a color panel, an achromatic panel, a backlight, and a panel controller configured to generate color panel and achromatic panel drive values. The panels may be LCD panels. The color panel drive values dynamically compensating for variations in the color of light transmitted by the achromatic panel due to varying drive conditions of the achromatic panel. The invention includes a system, method, or controller for generating or providing color panel drive values (and optionally also achromatic panel drive values) for a dual panel display in accordance with any embodiment of the method), and optionally also storing the drive values in an look-up table, and a computer readable medium which stores code for implementing any embodiment of the method.
摘要:
In one embodiment the present invention includes a display system for displaying video. The display system includes a backlight layer and an LCD layer. The display system controls the backlight layer and the LCD layer to emulate a cathode ray tube response. This emulation may be accomplished by applying a gamma function to a gamma corrected input signal. In this manner, the effects resulting from the “crushed blacks” phenomenon may be reduced.
摘要:
A compact arrangement of 3D filters is provided by a light source such as an LED and a spectral filter positioned to divide light from the light source into first and second lights having first and second spectral properties. A plurality of the compact sources may be arranged to illuminate (e.g., backlight) a modulator of a display (e.g., an LCD display). The modulator may be configured such that one region is illuminated by the first light and another region is illuminated by the second light (un modulated buffer between regions may be utilized to prevent crosstalk between the regions). The first and second lights are then modulated, for example, according to first and second channels of a 3D display.
摘要:
Approximation errors commonly occur when color transformation values stored in color look-up tables are interpolated to produce color display drive signals, since the stored transformation values typically correspond to non-linear functions. Such errors can be reduced by applying a pre-indexing function to the transformation values before they are stored in the look-up table, and by applying the same function to values extracted from the table during look-up operations. Alternatively, such errors can be reduced by providing one or more additional look-up tables to achieve higher order (i.e. more accurate) interpolation results that are achievable by interpolation of values stored in a single look-up table.