×

Lightguide structure, optical device and imaging system

  • US 10,656,421 B2
  • Filed: 09/11/2014
  • Issued: 05/19/2020
  • Est. Priority Date: 07/11/2014
  • Status: Active Grant
First Claim
Patent Images

1. A lightguide structure comprising:

  • a first portion configured to receive light rays emitted by an external display;

    a second portion configured to output the light rays from the first portion and ambient light incident on the second portion; and

    an intermediate portion disposed between the first portion and the second portion, and configured to reflect the light rays from the first portion and transfer the light rays to the second portion,wherein the second portion comprises;

    a plurality of first surfaces connected to each other and forming a stepped structure, the plurality of first surfaces being configured to reflect the light rays from the first portion; and

    at least one second surface configured to output the ambient light and the light rays reflected from the plurality of first surfaces,wherein the plurality of first surfaces comprise a plurality of inclined surfaces that are inclined with respect to the at least one second surface and at least one parallel surface located between the inclined surfaces, the at least one parallel surface being substantially parallel to the at least one second surface, andwherein a top plane surface of the intermediate portion and a bottom plane surface of the intermediate portion are inclined at a same angle, respectively, relative to a second surface among the at least one second surface of the second portion adjacent to the bottom plane surface of the intermediate portion.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×