Writable-erasable medium and a hand holdable writing device
AssigneeFreshape SA
InventorsYen-Cheng Kung, Yuhang Liu
Life of this patent
Estimating the term…
Abstract
The present invention concerns a hand holdable writing tool for generating a visual representation on a writable-erasable, passive medium. The invention also provides the assembly of the writing tool and the medium. The writing tool comprises a sensor capable of sensing non-visible light, and a data processing entity, configured for activating and/or disactivating individual inducer entities of the tool, thereby inducing image elements of the medium to generate said visual representation.
Claims18
A hand holdable writing device suitable for generating a visual representation on a writable-erasable medium comprising a plurality of image elements, the device comprising:
- a sensor capable of sensing non-visible light and configured to produce signals related to two-dimensional marker information associated with said writable-erasable medium;
- a plurality of inducer entities each inducer entity being configured for assuming independently at least two states, a first, inducing state, and a second, passive state, wherein, when in said first state, said inducer entities are configured for directing a predetermined amount of energy in the form of electromagnetic radiation in a predetermined direction;
- and
- a data processing entity, configured for acting on individual inducer entities so as to switch between said first and second states, said data processing entity being configured to act on said inducer entities on the basis of the signals produced by said sensor and on the basis of the visual representation to be generated on said writable-erasable medium,
- wherein said electromagnetic radiation is appropriate to generate a change of the light absorption characteristics in one or more image elements of said plurality of image elements, thereby contributing to the generation of said visual representation.
A writable-erasable medium capable of providing an erasable visual representation, the medium comprising a plurality of image elements, which, depending on a position, configuration, orientation and/or light absorption characteristics of said image elements, affect the reflection of visible light impinging on said writable-erasable medium and contribute to the generation of said visual representation, said medium further comprising a transparent support and two-dimensional marker information associated with said support, wherein said marker information is transparent to visible light, and wherein said image element comprises a photochromic and/or photoelectrochromic component.
Dependencies are inferred from the claim text.