Electronic book

• US 9,996,115 B2
• Filed: 05/31/2016
• Issued: 06/12/2018
• Est. Priority Date: 05/02/2009
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Yamazaki, Shunpei, Koyama, Jun, Arai, Yasuyuki, Kawamata, Ikuko, Miyaguchi, Atsushi, Moriya, Yoshitaka
• Primary Examiner(s): Nguyen, Kevin M
• Application Number:
  US15/168,674
• Publication Number:
  US 20160274623A1
• Time in Patent Office: 742 Days
• CPC Class Codes: G02F 1/133305 Flexible substrates, e.g. plastics, organic film
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G06F 1/1616 with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
• CPC Class Codes: G06F 1/1635 Details related to the integration of battery packs and other power supplies such as fuel cells or integrated AC adapter
• CPC Class Codes: G06F 1/1643 the display being associated to a digitizer, e.g. laptops that can be used as penpads details related to the relative motion of the display enclosure with respect to the body enclosure, e.g. to move between laptop and tablet PC configuration G06F1/1615
• CPC Class Codes: G06F 1/1647 including at least an additional display G06F1/1692 takes precedence
• CPC Class Codes: G06F 1/1652 the display being flexible, e.g. mimicking a sheet of paper, or rollable
• CPC Class Codes: G06F 3/1423 controlling a plurality of local displays, e.g. CRT and flat panel display
• CPC Class Codes: G06F 3/147 using display panels
• CPC Class Codes: G09G 2300/08 Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
• CPC Class Codes: G09G 2310/0218 with collection of electrodes in groups for n-dimensional addressing
• CPC Class Codes: G09G 2310/0267 Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
• CPC Class Codes: G09G 2310/0275 Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current
• CPC Class Codes: G09G 2310/0281 Arrangement of scan or data electrode driver circuits at the periphery of a panel not inherent to a split matrix structure
• CPC Class Codes: G09G 2330/02 Details of power systems and of start or stop of display operation
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2360/144 the light being ambient light
• CPC Class Codes: G09G 2380/14 Electronic books and readers
• CPC Class Codes: G09G 3/035 for flexible display surfaces
• CPC Class Codes: G09G 3/20 : for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 3/2096 : Details of the interface to the display terminal specific for a flat panel suitable for both CRT and flat panel G09G5/006; specific for a CRT G09G1/167
• CPC Class Codes: G09G 3/3225 : using an active matrix
• 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
• CPC Class Codes: G09G 3/3648 : using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 5/003 : Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto specific for a CRT G09G1/165; for a flat panel G09G3/2092

Abstract

An e-book reader in which destruction of a driver circuit at the time when a flexible panel is handled is inhibited. In addition, an e-book reader having a simplified structure. A plurality of flexible display panels each including a display portion in which display control is performed by a scan line driver circuit and a signal line driver circuit, and a binding portion fastening the plurality of display panels together are included. The signal line driver circuit is provided inside the binding portion, and the scan line driver circuit is provided at the edge of the display panel in a direction perpendicular to the binding portion.

Claims

1. An electronic device comprising:

a first display panel comprising a first display portion comprising a first display element;

a second display panel comprising a second display portion comprising a second display element;

a binding portion connecting the first display panel and the second display panel;

an image signal generation circuit operationally connected with the first display panel and the second display panel;

a memory portion operationally connected with the image signal generation circuit; and

a CPU operationally connected with the image signal generation circuit,

wherein the first display panel and the second display panel are touch displays,

wherein the CPU, the memory portion, and the image signal generation circuit are included in the binding portion,

wherein the first display panel and the second display panel are flexible display panels,

wherein a bending portion of the first display panel or the second display panel is provided on a side near the binding portion,

wherein a non-bending portion of the first display panel or the second display panel is provided on a side away from the binding portion, and

wherein the first display element or the second display element overlaps with the non-bending portion.

2. The electronic device according to claim 1, wherein the first display element and the second display element include electroluminescent materials.

3. The electronic device according to claim 1, further comprising a first signal line driver circuit and a second signal line driver circuit operationally connected with the first display panel and the second display panel, respectively,

wherein the first signal line driver circuit and the second signal line driver circuit are included in the binding portion.

4. The electronic device according to claim 1, further comprising a secondary battery in the binding portion.

5. The electronic device according to claim 1, wherein the CPU, the memory portion, and the image signal generation circuit are operationally connected to each other through an interface.

6. The electronic device according to claim 1,

wherein the memory portion is configured to store information to be displayed on the first display portion or the second display portion, and

wherein the memory portion comprises a random access memory.

7. The electronic device according to claim 1, further comprising a power feeding portion in the binding portion,

wherein the power feeding portion is configured to perform a wireless power feeding.

8. An electronic device comprising:

a first flexible display panel comprising a first display portion;

a second flexible display panel comprising a second display portion, wherein the first flexible display panel and the second flexible display panel are fastened with each other;

an image signal generation circuit operationally connected with the first flexible display panel and the second flexible display panel;

a memory portion operationally connected with the image signal generation circuit;

a CPU operationally connected with the image signal generation circuit;

a first reinforcing plate which prevents at least a portion of the first flexible display panel from bending; and

a second reinforcing plate which prevents at least a portion of the second flexible display panel from bending.

9. The electronic device according to claim 8, wherein the first flexible display panel and the second flexible display panel are touch displays.

10. The electronic device according to claim 8, wherein the CPU, the memory portion, and the image signal generation circuit are located between the first flexible display panel and the second flexible display panel.

11. The electronic device according to claim 8, further comprising a binding portion at which the first flexible display panel and the second flexible display panel are fastened.

12. The electronic device according to claim 11, further comprising a first signal line driver circuit and a second signal line driver circuit operationally connected with the first flexible display panel and the second flexible display panel, respectively,

wherein the first signal line driver circuit and the second signal line driver circuit are included in the binding portion.

13. The electronic device according to claim 11, further comprising a secondary battery in the binding portion.

14. The electronic device according to claim 11, further comprising a power feeding portion in the binding portion,

wherein the power feeding portion is configured to perform a wireless power feeding.