DISPLAY MODULE WITH PIEZOELECTRIC HAPTICS

• US 20100117809A1
• Filed: 11/11/2008
• Published: 05/13/2010
• Est. Priority Date: 11/11/2008
• Status: Abandoned Application

• Current Assignee: Motorola Mobility LLC (Lenovo Group Ltd.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Baciu, Paul, Zhuang, Zhiming, Dai, Xunhu
• Application Number:
  US12/268,628
• Publication Number:
  US 20100117809A1
• Time in Patent Office: Days
• US Class Current: 340/407.200
• CPC Class Codes: G06F 3/016 Input arrangements with force or tactile feedback as computer generated output to the user
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means

Abstract

A mobile communication terminal (10) is provided. The mobile communication terminal (10) includes a touch sensitive liquid crystal display (LCD) module (12) having a predetermined plurality of touch sensitive areas (20, 22) and a plurality of piezoelectric elements (106, 108, 110, 112) disposed along a periphery of a cover glass of the display module (12) wherein activation of the piezoelectric elements provides tactile feedback to a user of activation of a portion of the touch sensitive LCD module (12) by the user.

Claims

1. A mobile communication terminal comprising:

a touch sensitive liquid crystal display (LCD) module having a predetermined plurality of touch sensitive areas; and

a plurality of piezoelectric elements disposed along a periphery of a cover glass of the display module wherein activation of the piezoelectric elements provides tactile feedback to a user confirming activation of a portion of the touch sensitive LCD module by the user.

2. The mobile communication terminal as in claim 1 wherein the touch sensitive LCD module further comprises an LCD glasses.

3. The mobile communication terminal as in claim 2 wherein the LCD glasses further comprises a front display cover glass surface and a rear cover glass surface with the plurality of piezoelectric elements disposed on the rear surface along a set of outside edges of the LCD active area.

4. The mobile communication terminal as in claim 3 further comprising a plurality of transparent thin film wires disposed on the rear surface connecting the plurality of piezoelectric elements to a driver.

5. The mobile communication terminal as in claim 3 comprising a plurality of flex circuit boards connecting the plurality of piezoelectric elements to a driver.

6. The mobile communication terminal as in claim 1 further comprising a controller that detects activation of a portion of the touch sensitive display and in response activates at least some of the plurality of piezoelectric elements.

7. The mobile communication terminal as in claim 5 further comprising a drive signal applied to the at least some of the piezoelectric elements.

8. The mobile communication terminal as in claim 6 wherein the drive signal further comprises a temporal length of 0.001 to 0.5 seconds first following activation of the portion of the touch sensitive display.

10. The mobile communication terminal as in claim 8 further comprising a touch panel processor that detects activation of a touch sensitive area of the plurality of touch sensitive areas.

12. The mobile communication terminal as in claim 10 further comprising a signal applied to the at least some piezoelectric elements upon detection of the touch sensitive areas.

14. The mobile communication terminal as in claim 12 further comprising a plurality of thin film wires disposed on the rear surface connecting the plurality of piezoelectric elements to a driver of the signal.

15. The mobile communication terminal as in claim 8 further comprising a cellular telephone.

16. The mobile communication terminal as in claim 14 wherein the cellular telephone further comprises a housing and flexible mount wherein the flexible mount isolates the housing from vibration from the LCD display.

18. The mobile communication terminal as in claim 16 further comprising a housing with a flexible mount where the LCD floats within the housing on the flexible mount.

19. The mobile communication terminal as in claim 16 wherein the touch sensitive area further comprises a plurality of touch sensitive areas.

20. The mobile communication terminal as in claim 18 further comprising a touch panel processor that detects activation of a touch sensitive area of the plurality of touch sensitive areas.

9. A mobile communication terminal comprising:

a liquid crystal display (LCD);

a touch sensitive panel having a plurality of discrete, non-overlapping touch sensitive areas, said touch sensitive panel disposed over a viewing surface of the LCD; and

a plurality of piezoelectric elements disposed along a periphery of a rear surface of the LCD.

11. The mobile communication terminal as in claim 9 further comprising a driver coupled to the touch panel processor that activates at least some of the plurality of piezoelectric elements in response to detection of activation of the touch sensitive area.

13. The mobile communication terminal as in claim 11 wherein the 300 Hz signal further comprises a duration of from 0.001 to 5 seconds first following detection of activation of the touch sensitive area.

21. The mobile communication terminal as in claim 9 further comprising a driver coupled to the touch panel processor that activates at least some of the plurality of piezoelectric elements with a varying voltage signal in response to detection of activation of the touch sensitive area by the touch panel processor.

17. A mobile communication terminal comprising:

a liquid crystal display (LCD) having an upper viewing cover glass and a lower cover glass;

a touch sensitive member disposed on the upper viewing glass cover of the LCD; and

a plurality of piezoelectric elements disposed around a periphery of the lower cover glass and outside of a viewing area of the LCD.