Display device preventing unauthorized copying
AssigneeSeiko Epson Corporation
InventorsMunenori Sawada, Kazunori Hiramatsu
Life of this patent
Estimating the term…
Abstract
The present invention is adapted to make all the pixels of electrophoretic display 17 white (step S103) when light no longer incomes on the face of electrophoretic display 17 (“Yes” at step S102) . When someone places the face of electrophoretic display 17 on a contact glass of a copy machine to copy the contents on electrophoretic display 17 as they are, all the contents currently displayed on electrophoretic display 17 is deleted. As the result, the present invention can prevent the contents on electrophoretic display 17 from being easily copied by the copy machine as they are.
Claims8
A hand-held device including a memory display to keep displaying content even after power supply stops, the hand-held device comprising:
- a detecting section that detects that something touches a display screen by using a touch sensor;
- a display controlling section that deletes all of the content
- when the detecting section detects that something touches the display screen;
- a determination section that determines whether the content is allowed to be copied;
- and
- an operation forbidding section that forbids an operation of the display controlling section when the determination section determines that the content is allowed to be copied.
A hand-held device including a memory display to keep displaying content even after power supply stops, the hand-held device comprising:
- a detecting section that detects an amount of incoming light on a display screen displaying the content;
- a display controlling section that deletes all of the content
- when the detecting section determines that at least one of:
- the amount of the incoming light is equal to or smaller than a first threshold;
- the amount of the incoming light is equal to or greater than a second threshold;
- and
- a difference between the amount of the incoming light at different positions is equal to or greater than a third threshold;
- a determination section that determines whether the content is allowed to be copied;
- and
- an operation forbidding section that forbids an operation of the display controlling section when the determination section determines that the content is allowed to be copied.
Dependencies are inferred from the claim text.