Two-panel reflective liquid crystal display projection system and method of using the same
AssigneeSharp Laboratories of America, Inc.
InventorJames M. Florence
Life of this patent
Estimating the term…
Abstract
A system provides a two-panel projection system wherein both display devices run a sequence of red, green, and blue color fields with the sequences staggered so that two different color images are projected at any given time. Each panel shows a color field for two thirds of a frame time while the combination of colors displayed changes every one third of a frame time. With two separate red-green-blue sequences being projected, the display will be twice as bright as a single panel system and the presence of two different color fields at any give time will reduce the visibility of any color splitting artifacts.
Claims20
A two-panel reflective liquid crystal display projection system comprising:
- a screen adapted for displaying red, blue and green light;
- a polarized light beam splitter;
- a first liquid crystal display panel that receives light from said polarized light beam splitter and which provides a sequence of red, blue and green light to said screen;
- and
- a second liquid crystal display panel that receives light from said polarized light beam splitter and which provides a sequence of red, blue and green light to said screen,
- wherein said sequence provided by said second liquid crystal display panel is provided simultaneous to and staggered with respect to said sequence provided by said first liquid crystal display panel, such that at least two colors of red, blue and green light are simultaneously displayed on said screen.
A two-panel reflective liquid crystal display projection system comprising:
- a light source that provides light having a plurality of color bands and a predetermined orientation;
- a polarized light beam splitter adapted for passing light having a first predetermined orientation, and adapted for re-directing light having a second predetermined orientation;
- a first color switch positioned between said light source and said polarized light beam splitter, said first color switch adapted for changing an orientation of a color band of light provided by said light source;
- a first liquid crystal display panel positioned to receive said light re-directed by said polarized light beam splitter, said first liquid crystal display panel adapted for rotating an orientation of a color band of light received from said polarized light beam splitter;
- a second liquid crystal display panel positioned to receive said light passed by said polarized light beam splitter, said second liquid crystal display panel adapted for rotating an orientation of a color band of light received from said polarized light beam splitter;
- and
- a second color switch adapted for rotating an orientation of a color band of light incident on said second color switch, wherein said second color switch is positioned to receive light provided simultaneously from said first and second liquid crystal display panels.
A method of providing an image having at least two colors simultaneously projected at a given time, comprising the steps of:
- providing to a first color switch, light having at least three color bands, each color band having an orientation;
- operating said first color switch to rotate said orientation of at least one of said color bands;
- providing a beam splitter for receiving light from said first color switch, said beam splitter passing light having a first orientation and redirecting light having a second orientation;
- providing a first liquid crystal display panel for receiving light passed by said beam splitter, and operating said first liquid crystal display panel to rotate an orientation of a color band received by said first liquid crystal display panel;
- providing a second liquid crystal display panel for receiving light redirected by said beam splitter, and operating said second liquid crystal display panel to rotate an orientation of a color band received by said second liquid crystal display panel;
- and
- providing a second color switch for receiving light from said first and second liquid crystal display panels, and operating said second color switch to rotate said orientation of a color band received by said second color switch.
Dependencies are inferred from the claim text.