Apparatus and method for additive/subtractive pixel arrangement in color mosaic displays
AssigneeHoneywell Inc.
InventorMichael J. Johnson
Life of this patent
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Abstract
A liquid crystal display unit is described in which a first panel of pixel elements is used to control red and green portions of a displayed image using an additive technique while a second panel, having pixels aligned with the first panel pixels, controls the blue portion of the image through subtractive techniques. The resulting display system can provide enhanced brightness, resolution and color characteristics. The display system makes use of the fact that the eye is less sensitive to blue radiation for several visual parameters. As a result of the decreased sensitivity, the second (blue) panel can operate with less stringent requirements.
Claims20
A liquid crystal display system comprising:
- first panel means for controlling transmission of red and green image components therethrough;
- and
- second panel means for controlling transmission of blue image components therethrough, said second panel components being aligned with said red and green image components.
The method of displaying an image, said method comprising the steps of:
- controllably transmitting blue image components through a second panel in response to white light applied thereto;
- and
- controllably transmitting red and green image components through a first panel, said second panel receiving light from said second panel.
A liquid crystal display system for providing an image, said system comprising:
- a source of optical radiation;
- a second panel including first plurality of pixel units responsive to control signals for transmitting blue color components of said image along with red and green components of said optical radiation;
- and
- a first panel having a second and third plurality of pixel units responsive to control signals, said second plurality of pixels transmitting blue radiation and red color image components in response to radiation transmitted through said second panel, said third plurality of pixel units transmitting blue radiation and green color image components in response to radiation transmitted through said second panel.
Dependencies are inferred from the claim text.