Reflection type display apparatus and driving method thereof
AssigneeCanon Kabushiki Kaisha
InventorHajime Ikeda
Life of this patent
Estimating the term…
Abstract
A reflection type display apparatus includes: a light modulating layer having a first electrode having a light transmitting property on which an electroplating can be deposited, a second electrode disposed, in opposition to the first electrode, on a reflecting plate for reflecting light of a certain wavelength band, and an electrolytic solution containing a metal ion arranged in contact with the first and second electrodes, wherein, according to a density of current at an interface between the first electrode and the electrolytic solution, the light modulating layer controls a light transmitting ratio and a reflection ratio of the electroplating; and a control unit for setting a direction and the density of the current for depositing the electroplating of several colors.
Claims9
A reflection type display apparatus comprising:
- a light modulating layer having a first electrode having a light transmitting property on which an electroplating can be deposited, a second electrode disposed, in opposition to the first electrode, on a reflecting plate for reflecting light of a certain wavelength band, and an electrolytic solution containing a metal ion arranged in contact with the first and second electrodes, wherein, according to a density of current at an interface between the first electrode and the electrolytic solution, the light modulating layer controls a light transmitting ratio and a reflection ratio;
- and
- a control unit for setting a direction and the density of the current, wherein
- the control unit sets the density of the current at a first current density equal to a threshold current density or smaller than and approximately equal to the threshold current density at the time of depositing the electroplating of a first color, sets the density of the current at a second current density smaller than the first current density at the time of depositing the electroplating of a second color different from the first color, and sets the current to flow in a direction opposite to a direction of the current for forming the electroplating so that the electroplating disappears.
A driving method of a reflection type display apparatus comprising:
- a light modulating layer having a first electrode having a light transmitting property on which an electroplating can be deposited, a second electrode disposed, in opposition to the first electrode, on a reflecting plate for reflecting light of a certain wavelength band, and an electrolytic solution containing a metal ion arranged in contact with the first and second electrodes, wherein, according to a density of current at an interface between the first electrode and the electrolytic solution, the light modulating layer controls a light transmitting ratio and a reflection ratio, wherein the method comprising steps of:
- setting the density of the current at a first current density equal to a threshold current density or smaller than and approximately equal to the threshold current density, to deposited the electroplating of a first color, for displaying of the first color of the electroplating;
- setting the density of the current at a second current density smaller than the first current density, to deposited the electroplating of a second color different from the first color, for displaying of the second color of the electroplating;
- and
- setting the current to flow in a direction opposite to a direction of the current for forming the electroplating so that the electroplating disappears, for displaying of the color of the reflecting plate.
Dependencies are inferred from the claim text.