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OPTICAL WRITING APPARATUS, OPTICAL WRITING METHOD, AND RECORDING MEDIUM

  • US 20100091203A1
  • Filed: 06/10/2009
  • Published: 04/15/2010
  • Est. Priority Date: 10/10/2008
  • Status: Abandoned Application
First Claim
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1. An optical writing apparatus comprising:

  • an irradiation unit which irradiates a writing light on a photoconductor layer of an optical writing image display medium, the optical writing image display medium comprising the photoconductor layer, which has an electrical resistance which is changed according to a light amount of an irradiated writing light, and further comprising a display layer which displays an image by reflecting and transmitting light having a wavelength according to a magnitude of a voltage applied through the photoconductor layer;

    a voltage applying unit which applies an image writing pulse voltage to the display layer and the photoconductor layer; and

    a control unit which, at the time of image writing, controls the irradiation unit such that, at a first time interval at which the writing light is irradiated, the writing light is irradiated on the photoconductor layer, and which controls the voltage applying unit such that a first pulse voltage is applied to the display layer and the photoconductor layer at an interval which is longer than the first time interval, and such that a second pulse voltage whose polarity is opposite to a polarity of the first pulse voltage and whose absolute value is larger than an absolute value of the first pulse voltage is applied after application of the first pulse voltage.

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