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Light guide unit, image display device, and display apparatus

  • US 10,338,388 B2
  • Filed: 03/17/2015
  • Issued: 07/02/2019
  • Est. Priority Date: 03/25/2014
  • Status: Expired due to Fees
First Claim
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1. An image display device, comprising:

  • an image forming unit; and

    a light guide unit, the light guide unit including;

    a unitary light guide plate configured to guide light of an image formed in the image forming unit, wherein the unitary light guide plate has a thickness along a Z axis and a length along an X axis, and wherein the unitary light guide plate is configured to guide the light along the X axis;

    a support member; and

    one or more buffer members supporting the unitary light guide plate at, at least, a plurality of locations of the support member, wherein;

    the unitary light guide plate has a first elastic modulus;

    at least one buffer member of the one or more buffer members has a second elastic modulus selected to reduce image quality degradation caused by expansion or contraction of the unitary light guide plate, the second elastic modulus of the at least one buffer member being smaller than the first elastic modulus of the unitary light guide plate;

    the unitary light guide plate is attached to the support member at a first location of the support member via the at least one buffer member; and

    the unitary light guide plate is further attached to the support member at a second location of the support member via the at least one buffer member, the first and second locations being at opposite ends of the unitary light guide plate along the X axis.

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