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Three dimensional viewing glasses

  • US 4,907,860 A
  • Filed: 03/03/1988
  • Issued: 03/13/1990
  • Est. Priority Date: 03/03/1988
  • Status: Expired due to Fees
First Claim
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1. A pair of three-dimensional viewing glasses for viewing a screen with separate right-eye and left-eye images presented in a time-divided three-dimensional system wherein the right-eye image and the left-eye image alternate on the screen, comprising:

  • a right lens and a left lens, each lens comprising a laminate with liquid crystal means between two layers of clear sheet material for obscuring vision through that lens in an "OFF" state and for providing clear view through the lens in an "ON" state in response to receipt of a control signal,a pair of frames for supporting the lenses,signal conducting means for carrying a control signal from the three-dimensional system to the liquid crystal means of each lens, to control the alternating state of each lens,the liquid crystal means comprising a large number of droplets of liquid crystal material encapsulated in transparent latex material and sandwiched between two layers of clear sheet material, and including means responsive to receipt of the control signal for establishing an electrostatic field between the two sheet material layers in the "ON"0 state, effective to align liquid crystals in the droplets substantially with the direction in which the light from the image travels through the lens,and the latex material having added to it a dark pigment, for improving the contrast ratio of what is viewed in the "ON" condition by absorbing light scattered transversely to the line of sight in the "ON" state, whereby dark sections of the screen are made to appear darker.

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