Display Device

• US 20170263191A1
• Filed: 07/29/2014
• Published: 09/14/2017
• Est. Priority Date: 07/29/2014
• Status: Active Grant

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Birecki, Henryk, Gila, Omer, Leoni, Napoleon J., Simske, Steven J.
• Granted Patent: US 10,565,942 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 1/1652 the display being flexible, e.g. mimicking a sheet of paper, or rollable
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2310/0251 Precharge or discharge of pixel before applying new pixel voltage
• CPC Class Codes: G09G 3/344 based on particles moving in a fluid or in a gas, e.g. electrophoretic devices electrophoretic devices per se G02F1/167

Abstract

One example provides a display device. The display device includes an electronic paper display imageable by receiving charges on an imaging surface of the electronic paper display. The display device includes a first ground electrode opposite to a first portion of the imaging surface of the electronic paper display and a second ground electrode opposite to a second portion of the imaging surface of the electronic paper display. Writing to the second portion of the electronic paper display is selectively disableable.

Claims

1. A display device comprising:

an electronic paper display imageable by receiving charges on an imaging surface of the electronic paper display;

a first ground electrode opposite to a first portion of the imaging surface of the electronic paper display;

a second ground electrode opposite to a second portion of the imaging surface of the electronic paper display;

a ground connection contact; and

a severable electrical link between the ground connection contact and the second ground electrode.

2. The display device of claim 1, wherein the severable electrical link is physically severable.

3. The display device of claim 1, wherein the severable electrical link is electrically severable.

4. The display device of claim 1, wherein the severable electrical link comprises a conductive material which upon exposure to radiation turns nonconductive.

5. The display device of claim 1, wherein the severable electrical link comprises a charge transfer agent that when depleted turns the link nonconductive.

6. The display device of claim 1, wherein the severable electrical link comprises a switch.

7. A display device comprising:

an electronic paper display imageable by receiving charges on an imaging surface of the electronic paper display, the electronic paper display comprising a first portion and a second portion;

a first ground electrode opposite to the first portion of the electronic paper display; and

a second ground electrode opposite to the second portion of the electronic paper display,

wherein writing to the second portion of the electronic paper display is selectively disableable.

8. The display device of claim 7, wherein writing to the second portion of the electronic paper display is selectively disableable by a pre-conductive ink over the imaging surface of the second portion which upon curing turns conductive and shorts to the second ground electrode.

9. The display device of claim 7, wherein writing to the second portion of the electronic paper display is selectively disableable by breaking an electrical link between the first ground electrode and the second ground electrode.

10. The display device of claim 7, wherein writing to the second portion of the electronic paper display is selectively disableable by breaking an electrical link between the second ground electrode and a ground connection contact of the display device.

11. A method for disabling rewriting of a portion of a display device, the method comprising:

writing to a first portion of an electronic paper display imageable by receiving charges on an imaging surface of the electronic paper display;

writing to a second portion of the electronic paper display; and

disabling rewriting of the second portion of the electronic paper display.

12. The method of claim 11, wherein disabling rewriting of the second portion comprises severing a ground connection to the second portion.

13. The method of claim 11, wherein disabling rewriting of the second portion comprises electronically burning a fuse between a ground electrode of the second portion and a ground connection contact.

14. The method of claim 11, wherein disabling rewriting of the second portion comprises physically breaking an electrical link between a ground electrode of the second portion and a ground connection contact.

15. The method of claim 11, wherein writing to the second portion comprises writing a security code to the second portion.