Display device and control method thereof

• US 9,939,903 B2
• Filed: 05/11/2016
• Issued: 04/10/2018
• Est. Priority Date: 09/28/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Jihwan
• Primary Examiner(s): Merkoulova, Olga
• Application Number:
  US15/152,294
• Publication Number:
  US 20160252960A1
• Time in Patent Office: 699 Days
• CPC Class Codes: G06F 2203/04808 Several contacts: gestures triggering a specific function, e.g. scrolling, zooming, right-click, when the user establishes several contacts with the surface simultaneously; e.g. using several fingers or a combination of fingers and pen
• 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
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

A display device and method for controlling the display device are discussed. The display device can include a display unit for displaying a first object and a second object on a display screen, a tactile feedback unit for generating tactile feedback on the display screen; and a controller configured to generate a first tactile feedback according to properties of the first object while a first touch input is detected in a first region where the first object is displayed, generate a second tactile feedback according to properties of the second object while a second touch input is detected in a second region where the second object is displayed, detect a pressure of the first touch input or the second touch input, and adjust the intensity of the first tactile feedback or the second tactile feedback according to the detected pressure of the first touch input or the second touch input.

Claims

1. A display device comprising:

a display unit configured to display a plurality of objects including a first object and a second object on a display screen;

a tactile feedback unit configured to generate tactile feedback on the display screen; and

a controller configured to;

generate a first tactile feedback, via the tactile feedback unit, according to a first touch input in a first region where the first object is displayed, wherein the first tactile feedback varies via properties of the first object including at least one of a pattern, shape, size, intensity and brightness of the displayed first object,

detect a second touch input from the first region to a second region where a second object is displayed,

detect a releasing of the second touch input in the second region,

generate a second tactile feedback, via the tactile feedback unit, according to the detecting the releasing of the second touch input in the second region, wherein the second tactile feedback varies via properties of the second object including at least one of a pattern, shape, size, intensity and brightness of the displayed second object.

2. The display device according to claim 1, wherein the first tactile feedback is different than the second tactile feedback when the properties of the first object are different than the properties of the second object.

3. The display device according to claim 1, further comprising a piezoelectric sensor configured to detect the pressure of the first touch input or the second touch input.

4. The display device according to claim 1, wherein the controller is further configured to:

recognize a detection area of the first touch input or the second touch input, and

detect the pressure of the first touch input or the second touch input based on the recognized detection area of the first touch input or the second touch input.

5. The display device according to claim 1, wherein the tactile feedback unit is further configured to:

apply a first fine current to the display screen for the first tactile feedback, and

apply a second fine current to the display screen for the second tactile feedback, and

wherein the first fine current and the second fine current have a different strength.

6. The display device according to claim 1, wherein the tactile feedback unit is further configured to:

apply a first fine current to the display screen for the first tactile feedback, and

apply a second fine current to the display screen for the second tactile feedback, and

wherein the first fine current and the second fine current have a different generation period.

7. The display device according to claim 1, wherein the tactile feedback unit is further configured to:

generate a first ultrasonic wave for the first tactile feedback, and

generate a second ultrasonic wave for the second tactile feedback, and

wherein the first ultrasonic wave and the second ultrasonic wave have different magnitudes of resonance frequency.

8. The display device according to claim 1, wherein the tactile feedback unit is further configured to:

generate a first ultrasonic wave for the first tactile feedback, and

generate a second ultrasonic wave for the second tactile feedback, and

wherein the first ultrasonic wave and the second ultrasonic wave have different resonance generation periods of frequency.