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Electrophoretic display panel with selective line erasure

  • US 5,066,946 A
  • Filed: 07/03/1989
  • Issued: 11/19/1991
  • Est. Priority Date: 07/03/1989
  • Status: Expired due to Fees
First Claim
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1. An electrophoretic display apparatus comprises a display panel having a display surface and containing an electrophoretic dispersion of particles in a suspension medium, writing means for forming an image on the display surface in a write mode by attracting charged particles from the dispersion onto the display surface in a plurality of image lines, and line erasing means for selectively erasing a particular image line from among said plurality of image lines during a line erase mode, said particular image being erased by repelling charged particles from only a portion of the display surface corresponding to the image line to be erased such that a remainder of said plurality of image lines remains undisturbed during said line erase mode thereby allowing a new frame having substantial portions the same as the previous frame.

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