Display arrangement and approaches therefor
First Claim
1. A light arrangement for providing light to form an image, the arrangement comprising:
- a plurality of light sources, that provide light for respective portions of the image;
a light controller configured and arranged for controlling a brightness level of each light source in response to brightness data for the portion of the image for which the light source is to provide light, the brightness level being controlled independent of another brightness level that is associated with another portion of the image; and
an attenuation arrangement to selectively pass light from the light sources.
1 Assignment
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Accused Products
Abstract
Desirable control of displays is facilitated. According to an example embodiment of the present invention, a light arrangement provides light to form an image using a plurality of light sources (e.g., light generating or producing elements), a control arrangement and an attenuation arrangement. Each light source provides light for a portion of the image and the control arrangement independently controls the amount of light generated by each source according to a brightness of the portion of the image for which each source is providing light and, for certain embodiments, facilitating desirable power savings and/or contrast. The attenuation arrangement selectively passes light from the light sources to form the image.
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Citations
24 Claims
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1. A light arrangement for providing light to form an image, the arrangement comprising:
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a plurality of light sources, that provide light for respective portions of the image; a light controller configured and arranged for controlling a brightness level of each light source in response to brightness data for the portion of the image for which the light source is to provide light, the brightness level being controlled independent of another brightness level that is associated with another portion of the image; and an attenuation arrangement to selectively pass light from the light sources. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An attenuation display arrangement for displaying an image comprising:
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a viewing surface; a backlight arrangement having an array of light sources, each light source arranged to direct light for illuminating a portion of the viewing surface; a control arrangement to control the amount of light generated by the light sources; an attenuation arrangement to control the amount of light absorbed from the light sources, prior to the generated light reaching said portion of the viewing surface; and wherein the control arrangement reduces the brightness of said at least one of the light sources in response to a brightness to be displayed on the viewing surface, and the attenuation arrangement controls the amount of light absorbed from the light sources in response to the reduced brightness of said at least one of the light sources and the image. - View Dependent Claims (9, 10, 11, 12)
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13. A method for displaying images via an attenuation-based display having light sources that each illuminate a subset of pixels for the display, the method comprising, for each subset of pixels:
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determining a brightness for a brightest portion of an image to be displayed by the subset of pixels; controlling the brightness of at least one light source that illuminates the subset of pixels to provide the determined brightness for said brightest portion of an image; determining an attenuation factor for the subset of pixels in response to the determined brightness, and after light is generated by said at least one light source and before the generated light reaches the subset of pixels, using the attenuation factor to selectively control the amount of the generated light that reaches each pixel in the subset of pixels. - View Dependent Claims (14, 15, 16)
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17. A method for selective power-reduction of the operation of an attenuation-based display having light sources that each illuminate a set of pixels for a displayable area of the display, the method including the steps of:
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for at least one of the light sources, determining a brightness level based upon a desired brightness for a first set of pixels that are illuminated by said at least one of the light sources in accordance with a portion of an image to be displayed via the first set of pixels; controlling the brightness of said at least one of the light sources in response to the step of determining a brightness level; determining an attenuation factor for the first set of pixels in response to the step of controlling the brightness and in response to an image to be displayed; and in response to the attenuation factor, controlling the ratio of light generated by the light source that reaches the displayable area to light generated by the light source that does not reach the displayable area. - View Dependent Claims (18, 19)
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20. A method for manufacturing an attenuation display illuminated with a plurality of individually-controllable light sources that are attenuated with an attenuation arrangement, the method comprising:
arranging a number of light sources for generating an image as a function of an expected viewing angle of the display, the attenuation capabilities of the attenuation arrangement and human eye light scattering characteristics, characterized in that the number of light sources is about a threshold number of light sources for which, when implemented with the attenuation display arrangement, adding light sources does not facilitate any increase in perceivable contrast relative to the light scattering characteristics, and removing light sources results in decreased perceivable contrast relative to the light scattering characteristics. - View Dependent Claims (21, 22)
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23. An apparatus for illuminating a video display, the apparatus comprising:
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first and second light sources respectively configured and arranged to illuminate first and second portions of the video display; and a light controller configured and arranged to control a brightness level of the first light source based upon brightness characteristics of pixel data for pixels to be displayed on the first portion of the video display, independent of the brightness level of pixels to be displayed on a different portion of the video display, control a brightness level of the second light source based upon brightness characteristics of pixel data for pixels to be displayed on the second portion of the video display, independent of the brightness level of pixels to be displayed on a different portion of the video display.
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24. An apparatus for controlling light sources to illuminate portions of a video display, the apparatus comprising:
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a first light driver circuit configured and arranged to control a brightness level of a first one of the light sources based upon brightness characteristics of pixel data for pixels to be displayed on a portion of the video display illuminated by the first one of the light sources, independent of brightness characteristics of pixel data for pixels to be displayed on a different portion of the video display; and a second light driver circuit configured and arranged to control a brightness level of a second one of the light sources based upon brightness characteristics of pixel data for pixels to be displayed on a portion of the video display illuminated by the second one of the light sources, independent of brightness characteristics of pixel data for pixels to be displayed on a different portion of the video display.
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Specification