US 7,292,231 B2 · Writing device for color electronic paper

Abstract

A writing device is provided for color electronic paper which is capable of performing full color display. The writing device includes a head unit, a head unit moving mechanism which moves the head unit in a first direction, a feeding mechanism which moves electronic paper, and a controller. The head unit includes a writing head, an LED which emits light of three primary colors, an image sensing element consisting of a CMOS sensor, and an optical system. The writing head includes an optically transparent head main portion provided with pixel electrodes, and a common electrode (counter electrode). In the controller, an arrangement of three types of microcapsules in a microcapsule layer is detected to perform electric field formation for each of the pixel electrodes based on a detection result.

Claims15

Dependent claims

A writing device for performing writing with respect to color electronic paper which includes a microcapsule layer having microcapsules, whose colors change depending upon a direction of an electric field, the microcapsule layer including a plurality of types of microcapsules which are formed so as to be capable of displaying one color among a plurality of predetermined colors, respectively, the writing device for color electronic paper comprising:

a color arrangement detector which detects an arrangement of the plurality of types of microcapsules in the microcapsule layer;
and
an electric field controller which controls the electric field formation for each of the microcapsules on the basis of a result of the color arrangement detection by the color arrangement detector.

A writing device for color electronic paper which applies a voltage to color electronic paper with respective pixels formed of a plurality of encapsulating regions, which encapsulate charged particles or dispersion media colored in any one of a plurality of predetermined colors, and displays the color of the charged particles or dispersion media, which are encapsulated in the plurality of encapsulating regions, on a display surface, the writing device for color electronic paper comprising:

a first voltage applicator which applies a voltage to a predetermined region of the color electronic paper such that all the encapsulating regions in the predetermined region come into a color developed state;
a color detector which detects which color of the plurality of colors is a color displayed on the display surface of the predetermined region when the voltage is applied by the first voltage applicator;
and
a second voltage applicator which applies a voltage to the predetermined region so as to control the color developed state of the respective encapsulating regions in the predetermined region on the basis of colors of respective pixels forming a display image, which is displayed in the predetermined region, and a result of detection of the color detector.

1 more element

Dependencies are inferred from the claim text.

Writing device for color electronic paper

Life of this patent

Writing device for color electronic paper

Life of this patent

Abstract

Claims15