초록 ▼

A color display system includes a color light separator that separates incident white illumination light into red, green and blue wavelength bands to be directed to distinct color component sub-pixels (sometimes called dots) that are arranged in a dot-matrix, color triad arrangement (e.g., stripe or

A color display system includes a color light separator that separates incident white illumination light into red, green and blue wavelength bands to be directed to distinct color component sub-pixels (sometimes called dots) that are arranged in a dot-matrix, color triad arrangement (e.g., stripe or delta) to form individual picture elements (pixels) on a pixelated electronic image device (e.g., LCD of DMD). The entire picture is optically shifted from one set of color component sub-pixels to another in a 3-field sequence. As a result, the sets of red, green and blue color component sub-pixels appear to an observer as a single full-color image, thereby providing a dot sequential color display.

대표청구항 ▼

What is claimed is: 1. A color display optical system, comprising: a refractive lens array for receiving and focusing diverging color components of light; an imaging device that defines a plane with an array of pixels with pixel apertures; and a holographic grating positioned between the refracti

What is claimed is: 1. A color display optical system, comprising: a refractive lens array for receiving and focusing diverging color components of light; an imaging device that defines a plane with an array of pixels with pixel apertures; and a holographic grating positioned between the refractive lens and the imaging device to receive the color components of light from the refractive lens array and to align the color components of light along distinct, telecentric, non-diverging paths that are normal to the plane of the imaging device. 2. The system of claim 1 in which the lens array includes an array of cylindrical lenses. 3. The system of claim 1 in which the holographic grating is continuous and without optical power. 4. The system of claim 1 in which the holographic grating includes a volume hologram. 5. The system of claim 1 further comprising a color divergence element that provides the diverging color components of light to the refractive lens array. 6. The system of claim 5 in which the color divergence element includes plural angularly inclined dichroic mirrors for providing color separation of incident multi-color illumination light. 7. The system of claim 5 in which the color divergence element includes a holographic grating for providing color separation of incident multi-color illumination light. 8. The system of claim 7 in which the holographic grating of the color divergence element is substantially the same as the holographic grating for aligning the color components of light. 9. The system of claim 1 in which the holographic grating delivers the distinct color components of light to a selected plane and is positioned substantially midway between the selected plane and the lens array. 10. In an optical system having a focusing element for focusing separated color components of light to plural distinct regions of an imaging plane of an electronic imaging device with an array of pixel apertures, the improvement comprising: a diffractive color dispersing layer positioned between the focusing element and the imaging plane for aligning the color components of light along distinct, telecentric, non-diverging paths that are normal to the imaging plane at the pixel apertures. 11. The system of claim 10 in which the focusing element includes a microlens array. 12. The system of claim 11 in which the microlens array includes plural cylindrical lenses. 13. The system of claim 10 in which the diffractive color dispersing layer aligns the color components of light to be normal to the imaging plane. 14. The system of claim 10 in which the diffractive color dispersing layer includes a volumetric hologram. 15. The system of claim 14 in which the diffractive color dispersing layer is isotropic and without optical power. 16. The system of claim 10 in which the imaging plane is a transmissive type electronic display panel with pixel apertures in a stripe formation. 17. The system of claim 10 further comprising a color divergence element that provides diverging color components of light to the focusing element. 18. A telecentric color filtering method for providing telecentric color-filtered light to an imaging plane of an electronic imaging device, comprising: forming plural diverging color light components; directing the plural diverging color light components through a focusing element positioned before a holographic grating; and directing the plural diverging color light components through the holographic grating to align the color light components along distinct, non-diverging paths that are telecentric with respect to the imaging plane so that all the color light components are normal to the imaging plane. 19. The method of claim 18 in which the focusing element includes a lens array. 20. The method of claim 18 in which forming the plural diverging color light components includes directing multi-color illumination light toward plural angularly inclined dichroic mirrors that provide color separation of the incident multi-color illumination light. 21. The method of claim 18 in which forming the plural diverging color light components includes directing multi-color illumination light through a holographic grating for providing color separation of incident multi-color illumination light.