Display-input apparatus for a multi-configuration portable device

• US 20050243069A1
• Filed: 04/30/2004
• Published: 11/03/2005
• Est. Priority Date: 04/30/2004
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Moskowitz, Douglas W., Tracy, James L., Fredley, David S., Yorio, Rudy
• Granted Patent: US 7,330,178 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G02F 1/134327 Segmented, e.g. alpha numeric display
• CPC Class Codes: G02F 1/13478 based on selective reflection
• 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 1/1677 for detecting open or closed state or particular intermediate positions assumed by movable parts of the enclosure, e.g. detection of display lid position with respect to main body in a laptop, detection of opening of the cover of battery compartment
• CPC Class Codes: G06F 1/1692 the I/O peripheral being a secondary touch screen used as control interface, e.g. virtual buttons or sliders
• CPC Class Codes: G06F 2200/1614 Image rotation following screen orientation, e.g. switching from landscape to portrait mode
• CPC Class Codes: G06F 3/04886 by partitioning the display area of the touch-screen or the surface of the digitising tablet into independently controllable areas, e.g. virtual keyboards or menus
• CPC Class Codes: H04M 1/0222 Foldable in two directions, i.e. using a two degree of freedom hinge
• CPC Class Codes: H04M 1/72466 with selection means, e.g. keys, having functions defined by the mode or the status of the device
• CPC Class Codes: H04M 2250/22 including a touch pad, a touch sensor or a touch detector digitizers for touch screens G06F3/041

Abstract

A portable electronic device includes a display-input apparatus (108) for displaying alternate character sets, in correspondence with a selected mode of operation of the device. The display-input apparatus uses first and second cholesteric display layers (302, 304) to display the different character sets. Each cholesteric display layer displays a different character set when active. When not active, the cholesteric display layer is rendered transparent.

Claims

1. A display-input apparatus for a portable electronic device, comprising:

a first cholesteric display layer for displaying a first character set, and having top and bottom electrode elements made of transparent conductor; and

a second cholesteric display layer for displaying a second character set, wherein at least a portion of the first character set and the second character set are coincident, and having a top electrode made of transparent conductor;

wherein the first cholesteric display layer is operated in a transparent mode when the display-input apparatus is displaying the second character set.

2. A display-input apparatus as defined in claim 1, wherein the first character set and the second character set each comprise at least one character.

3. A display-input apparatus as defined in claim 1, wherein the first character set and the second character set are oriented differently so that the first character set is to be normally viewed from a first orientation and the second character set is to be normally viewed from a second orientation.

4. A display-input apparatus as defined in claim 3, wherein the portable electronic device comprises at least two body portions and may be physically configured into at least a first configuration corresponding to a first mode of operation, and a second configuration corresponding to a second mode of operation, the first character set is displayed when the portable electronic device is in the first configuration and the second character set is displayed when the portable electronic device is in the second configuration.

5. A display-input apparatus as defined in claim 1, wherein the second cholesteric display layer is operated in a transparent state when the first cholesteric display layer is used to display the first character set.

6. A display-input apparatus as defined in claim 1, wherein the first cholesteric display layer and the second cholestenic layer are each a different color.

7. A display-input apparatus as defined in claim 1, further comprising a touch screen layer disposed on top of the first cholesteric display layer for detecting a tactile input location of a user.

8. A multi-configuration portable electronic device, comprising:

a first body portion;

a second body portion hingeably connected to the first body portion;

wherein the first and second body portions are moveable relative to each other so as to allow configuration of the multi-configuration portable electronic device into at least a first configuration and a second configuration, and wherein the first configuration is used when the multi-configuration portable electronic device is operated in a first mode of operation, and the second configuration is used when the multi-configuration portable electronic device is operated in a second mode of operation; and

a display-input apparatus disposed on the second body portion, the display-input apparatus comprising;

a first cholesteric display layer for displaying a first character set when the multi-configuration portable electronic device is operated in the first mode of operation; and

a second cholesteric display layer for displaying a second character set when multi-configuration portable electronic device is operated in the second mode of operation, wherein at least a portion of the first character set and the second character set are coincident.

9. A multi-configuration portable electronic device as defined in claim 8, wherein the first character set and the second character set each comprise at least one character.

10. A multi-configuration portable electronic device as defined in claim 8, wherein the first character set and the second character set are oriented differently so that the first character set is to be normally viewed from a first orientation and the second character set is to be normally viewed from a second orientation.

11. A multi-configuration portable electronic device as defined in claim 10, wherein the portable electronic device comprises at least two body portions and may be physically configured into at least a first configuration corresponding to a first mode of operation, and a second configuration corresponding to a second mode of operation, the first character set is displayed when the portable electronic device is in the first configuration and the second character set is displayed when the portable electronic device is in the second configuration.

12. A multi-configuration portable electronic device as defined in claim 8, wherein the second cholesteric display layer is operated in a transparent state when the first cholesteric display layer is used to display the first character set.

13. A multi-configuration portable electronic device as defined in claim 8, wherein the first cholesteric display layer and the second cholesteric display layer are each a different color.

14. A multi-configuration portable electronic device as defined in claim 8, further comprising a touch screen layer disposed on top of the first cholesteric display layer for detecting a tactile input location of a user.

15. A method of operating a display-input apparatus for a portable electronic device, the display-input apparatus having a first cholesteric display layer and a second cholesteric display layer, the first cholesteric display layer having top and bottom electrodes made of transparent conductor, the second cholesteric display layer having a top electrode made of transparent conductor, the method comprising:

arranging the first and second cholesteric display layers so that at least a portion of the second cholesteric display layer is only visible through the first cholesteric display layer;

displaying a first character set on the first cholesteric display layer when the portable electronic device is operated in a first mode; and

displaying a second character set on the second cholesteric display layer when the portable electronic device is operated in a second mode.