Electronic display devices and methods

• US 6,859,218 B1
• Filed: 11/07/2000
• Issued: 02/22/2005
• Est. Priority Date: 11/07/2000
• Status: Expired due to Fees

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Johnson, Samuel A., Luman, David J., Camis, Thomas
• Primary Examiner(s): Tran, Henry N.
• Application Number:
  US09/708,362
• Time in Patent Office: 1,568 Days
• Field of Search: 345/169, 345/864, 345/536, 347/55, 347/139, 358/1.13, 358/1.15, 704/270, 707/200, 399/158
• US Class Current: 347/139
• CPC Class Codes: G03G 15/04054 by LED arrays
• CPC Class Codes: G03G 15/221 Machines other than electrographic copiers, e.g. electrophotographic cameras, electrostatic typewriters
• CPC Class Codes: Y10S 345/901 Electronic book with display

Abstract

Electronic display devices and methods are described. In one embodiment, a display device comprises a housing and a display area provided within the housing to display content for a user. Memory is provided within the housing to hold data that is to be rendered into user-viewable content. An electrophotographic assembly is provided within the housing and is configured to electrophotographically render user-viewable content from the data that is held in the memory. A loop of material is disposed proximate the electrophotographic assembly and is configured to receive electrophotographically rendered content and present the content for user viewing within the display area. A control area is provided on the housing and includes one or more user-engagable structures to permit a user to interact with the device. The control area is positioned on the housing to accommodate one-handed use of the device. In one embodiment, the control area is provided on a sidewall that extends between front and back faces of the housing. The user-engagable structures can comprise any suitable user engagable structure, with an exemplary structure comprising a rocker-type switch which accommodates one-handed use of the display reader.

Claims

1. An electronic display device comprising:

a housing;

a display area provided within the housing to display content for a user;

memory within the housing to hold data that is to be rendered into user-viewable content;

an electrophotographic assembly within the housing configured to electrophotographically render user-viewable content from the data that is held in the memory;

a loop of material disposed proximate the electrophotographic assembly and configured to receive electrophotographically rendered content and present the content for user viewing within the display area; and

a control area on the housing comprising one or more user-engagable structures to permit a user to interact with the device, the control area being positioned on the housing to accommodate one-handed use of the device; and

wherein the housing comprises a front and back face and at least one sidewall extending therebetween, the control area being disposed on the sidewall.

2. The electronic display device of claim 1, wherein the loop of material comprises a dielectric material.

3. The electronic display device of claim 1 further comprising a power source internally of the housing.

4. The electronic display device of claim 3, wherein the power source comprises one or more batteries.

5. An electronic display device comprising:

a housing;

a display area provided within the housing to display content for a user;

memory within the housing to hold data that is to be rendered into user-viewable content;

an electrophotographically render user-viewable content from the data that is held in the memory;

a loop of material disposed proximate the electrophotographic assembly and configured to receive electrophotographically rendered content and present the content for user viewing within the display area; and

a control area on the housing comprising one or more user-engagable structures to permit a user to interact with the device, the control area being positioned on the housing to accommodate one-handed use of the device; and

wherein the device is portable.

6. The electronic display device of claim 5, wherein the housing comprises a front and back face and at least one sidewall extending therebetween, the control area being disposed on the sidewall.

7. The electronic display device of claim 5, wherein the loop of material comprises a dielectric material.

8. The electronic display device of claim 5 further comprising a power source internally of the housing.

9. The electronic display device of claim 8, wherein the power source comprises one or more batteries.

10. An electronic display device comprising:

a housing;

a display area provided within the housing to display content for a user;

memory within the housing to hold data that is to be rendered into user-viewable content;

an electrophotographic assembly within the housing configured to electrophotographically render user-viewable content from the data that is held in the memory, the content being renderable by the assembly at at least 300 dpi;

a loop of material disposed proximate the electrophotographic assembly and configured to receive electrophotographically rendered content and present the content for user viewing within the display area; and

a control area on the housing comprising one or more user-engagable structures to permit a user to interact with the device, the control area being positioned on the housing to accommodate one-handed use of the device; and

wherein the housing comprises a front and back face and at least one sidewall extending therebetween, the control are being disposed on the sidewall.

11. The electronic display device of claim 10, wherein at least one of the user-engagable structures comprises a rocker-type switch.

12. The electronic display device of claim 10, wherein the assembly is configured to render the content at 600 dpi.

13. The electronic display device of claim 10, wherein the assembly is configured to render the content at 600 dpi, and the device weighs no more than two pounds.

14. An electronic display device comprising:

a housing;

a display area provided with the housing to display content for a user;

memory within the housing to hold data that is to be rendered into user-viewable content;

a print media within the housing and configured to display, with toner, user-viewable content for a user;

a toner shuttling system within the housing configured to shuttle toner between different locations within the housing from which the toner can be used and reused; and

a control area on the housing comprising one or more user-engagable structures to permit a user to interact with the device, the control area being positioned on the housing to accommodate one-handed use of the device; and

wherein the housing comprises a front and back face and at least one sidewall extending therebetween, the control area being disposed on the sidewall, at least one of the user-engagable structures comprising a rocker-type switch.

15. The electronic display device of claim 14 further comprising an exposure station within the housing positioned to expose the loop of material so that toner can be applied and retained thereon.

16. An electronic display device comprising:

a housing;

a display area provided within the housing to display content for a user;

memory within the housing to hold data that is to be rendered into user-viewable content;

a print media within the housing and configured to display, with toner, user-viewable content for a user;

a toner shuttling system within the housing configured to shuttle toner between different locations within the housing from which the toner can be used and reused; and

a control area on the housing comprising one or more user-engagable structures to permit a user to interact with the device, the control area being positioned on the housing to accommodate one-handed use of the device; and

wherein the housing comprises a front and back face and at least one sidewall extending therebetween, the control area being disposed on the sidewall.

17. The electronic display device of claim 16 further comprising an exposure station within the housing positioned to expose the loop of material so that toner can be applied and retained thereon.

18. A method of displaying images comprising:

providing a hand-held, portable display device having a control area containing user-engagable structures that permit a user to interact with the device, the sttructures being positioned to accommodate one-handed operation of the device, the device comprising an electrophotographic assembly configured to electrophotographically render user-viewable content, and a loop of material proximate the electrophotographic assembly to receive electrophotographically rendered content and present the content to a user for viewing;

advancing the loop of material through the electrophotographic assembly;

electrophotographically forming an image on the loop of material; and

displaying the image for a user to view.

19. The method of claim 18, wherein the loop of material is configured to provide a black/white contrast when used in connection with black toner.

20. The method of claim 18, wherein said forming of the image comprises retaining toner on the loop of material using only electrostatic forces.

21. The method of claim 18, wherein said forming of the image comprises applying non-fused toner to the loop of material.

22. The method of claim 21 further comprising reclaiming toner that has been used to form an image and reusing the reclaimed toner to form additional images.