Compact electronic viewfinder
AssigneeDisplaytech, Inc.
InventorsPaul Weissman, Mark Handschy
Life of this patent
Estimating the term…
Abstract
An electronic viewfinder with a reflective microdisplay and associated optical elements in a design that utilizes one or more folded optical paths to achieve a compact size and volume that may have a dimension of less than 10 millimeters per side. Moreover, the optical design may have an effective focal length that is greater than the spacing of the optical elements from the microdisplay. Various embodiments include a pancake window arrangement with reflective surfaces that are spaced apart from each other and cube beamsplitter eyepieces with folded paths.
Claims11
A miniature display system, comprising:
- a microdisplay;
- a source of light positioned to direct light onto the microdisplay;
- and
- one or more optical elements positioned in front of the microdisplay to provide a magnified virtual image of the microdisplay for a viewer;
- wherein the optical elements are all located within 10 millimeters of the microdisplay.
A miniature display system, comprising:
- a microdisplay;
- a source of light positioned to direct light onto the microdisplay;
- and
- one or more optical elements positioned in front of the microdisplay to provide a magnified virtual image of the microdisplay for a viewer;
- wherein the optical elements have an effective focal length that is greater than the distance of the optical elements from the microdisplay.
A miniature display system, comprising:
- a microdisplay;
- a source of polarized light positioned to direct light onto the microdisplay;
- a polarizing beam splitter positioned to receive light reflected from the microdisplay;
- a mirror positioned to receive light from the beam splitter and redirect light into the beamsplitter;
- and
- a magnifying lens positioned to receive light from the beamsplitter;
- wherein two of the three of the microdisplay, the mirror, and the magnifying lens are positioned on the same axis and the other of the three is positioned orthogonally thereto.
Dependencies are inferred from the claim text.