TOUCH DISPLAY DEVICE FOR ENERGY HARVESTING

• US 20160124555A1
• Filed: 07/28/2015
• Published: 05/05/2016
• Est. Priority Date: 10/29/2014
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: HONG, Won-Ki, LEE, Jong Seo
• Granted Patent: US 9,753,538 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally

Abstract

Disclosed herein is a touch display device, including: a panel including a plurality of sensing electrodes which are arranged under a dielectric layer and in a matrix configuration; a rectification unit including at least one rectifier configured to be connected to at least two sensing electrodes; and an energy storage unit including at least one capacitive element which is connected to the rectifier.

Claims

1. A touch display device, comprising:

a panel including a plurality of sensing electrodes which are arranged under a dielectric layer and in a matrix configuration;

a rectification unit including at least one rectifier configured to be connected to at least two sensing electrodes; and

an energy storage unit including at least one capacitive element which is connected to the rectifier.

2. The touch display device of claim 1, wherein

the plurality of sensing electrodes comprises N pairs of the sensing electrodes, where N is a natural number;

the rectification unit includes N rectifiers, and

each pair of the sensing electrodes is connected to a different one of the rectifiers.

3. The touch display device of claim 1, wherein

the rectification unit comprises single rectifier, and

the plurality of sensing electrodes is connected to or disconnected from the single rectifier according to a control signal.

4. The touch display device of claim 1, wherein

the dielectric layer is charged with negative charge.

5. The touch display device of claim 1, wherein

the panel is bent so as to have a curved shape so as to have a first radius of curvature, and

the panel is further configured to receive a voltage and to flatten in response to the received voltage so as to have a second radius of curvature, the second radius of curvature being larger than the first radius of curvature.

6. The touch display device of claim 1, wherein

the touch display device is a self capacitance type display device.

7. The touch display device of claim 1, further comprising:

a timing control unit configured to output a control signal during at least one of a plurality of driving modes, the plurality of driving modes including a first driving mode, a second driving mode, and a third driving mode;

a touch control unit configured to supply a touch driving voltage and to process a touch signal; and

a mode selection unit configured to connect the sensing electrodes to the touch control unit in the first driving mode and to selectively connect ones of the sensing electrodes to the rectification unit in the second driving mode.

8. The touch display device of claim 7, further comprising

a haptic driving unit configured to supply a haptic voltage,

wherein the mode selection unit is further configured to connect the sensing electrodes to the haptic driving unit in the third driving mode.

9. The touch display device of claim 7, wherein the touch display device is further configured to implement each driving mode in a time divided manner.

10. The touch display device of claim 9, wherein

the touch display device is further configured to implement the second driving mode after the first driving mode,

at least two sensing electrodes form a circuit in the second driving mode, together with the rectifier of the rectification unit, and

the energy storage unit is configured to store a current generated in the closed circuit by a touch.

11. The touch display device of claim 10, wherein the touch display device is further configured to repeatedly implement the first driving mode and the second driving mode during a dead time of the display.