DISPLAY DEVICE HAVING A PLANAR SURFACE PORTION AND A CURVED SURFACE PORTION

• US 20180143669A1
• Filed: 11/07/2017
• Published: 05/24/2018
• Est. Priority Date: 11/22/2016
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: BOK, Seunglyong, KWAK, Heejune, KIM, Mugyeom, KIM, Youngseok, LEE, Hojung
• Granted Patent: US 10,795,417 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 1/1626 with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]
• CPC Class Codes: G06F 1/1637 Details related to the display arrangement, including those related to the mounting of the display in the housing
• 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 1/1692 the I/O peripheral being a secondary touch screen used as control interface, e.g. virtual buttons or sliders
• CPC Class Codes: G06F 2203/04102 Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
• CPC Class Codes: G06F 2203/04105 Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
• CPC Class Codes: G06F 2203/04106 Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/042 by opto-electronic means
• CPC Class Codes: G06F 3/043 using propagating acoustic waves
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A bent display device including: a display panel including a planar surface portion and a curved surface portion at an edge of the planar surface portion; a window having substantially the same shape as a shape of the display panel and disposed on the display panel; a first touch sensor overlapping the planar surface portion; and a second touch sensor overlapping the curved surface portion. The first touch sensor and the second touch sensor detect a touch using different methods, respectively.

Claims

1. A bent display device comprising:

a display panel comprising a planar surface portion and a curved surface portion disposed at an edge of the planar surface portion;

a window disposed on the display panel and having a substantially same shape as a shape of the display panel;

a first touch sensor disposed to overlap the planar surface portion; and

a second touch sensor disposed to overlap the curved surface portion,

wherein the first touch sensor and the second touch sensor are configured to detect a touch using different methods, respectively.

2. The bent display device as claimed in claim 1, wherein the first touch sensor is a capacitive touch sensor.

3. The bent display device as claimed in claim 1, wherein the second touch sensor comprises at least one of:

a pressure sensitive touch sensor, an optical touch sensor, and an ultrasonic touch sensor.

4. The bent display device as claimed in claim 1, wherein the first touch sensor has a substantially same shape as a shape of the planar surface portion on a plane.

5. The bent display device as claimed in claim 1, wherein the second touch sensor has a substantially same shape as a shape of the curved surface portion on a plane.

6. The bent display device as claimed in claim 1, wherein the first touch sensor and the second touch sensor comprise different driving units, respectively.

7. The bent display device as claimed in claim 1, wherein the display panel is an organic light emitting diode display panel.

8. The bent display device as claimed in claim 1, wherein the first touch sensor is disposed between the display panel and the window.

9. The bent display device as claimed in claim 1, wherein the first touch sensor is disposed inside the display panel.

10. The bent display device as claimed in claim 1, wherein the second touch sensor is disposed between the display panel and the window.

11. The bent display device as claimed in claim 1, wherein the second touch sensor is disposed on a rear surface of the display panel.

12. The bent display device as claimed in claim 1, wherein the second touch sensor comprises:

a first electrode and a second electrode opposing each other; and

a filler disposed between the first electrode and the second electrode.

13. The bent display device according to claim 12, wherein the filler comprises at least one of silicon and polydimethylsiloxane (PDMS).

14. The bent display device as claimed in claim 12, wherein the second touch sensor comprises a control unit configured to apply a voltage to the first electrode and the second electrode and sense a capacitance between the first electrode and the second electrode.

15. The bent display device as claimed in claim 1, wherein the second touch sensor comprises:

a sensor resistor having a resistance value that varies in accordance with a pressure applied by a contact;

a filter resistor connected in series to the sensor resistor and having a constant resistance value; and

a pressure sensing unit connected to a node between the sensor resistor and the filter resistor.

16. The bent display device as claimed in claim 11, wherein the curved surface portion comprises:

a pixel area at which an image is displayed; and

a transmissive area, disposed between the pixel areas, through which a light is transmitted.

17. The bent display device as claimed in claim 16, wherein the transmissive area gradually increases from a boundary between the planar surface portion and the curved surface portion toward an edge of the display panel.

18. The bent display device as claimed in claim 11, wherein the display panel comprises:

a first pixel disposed at the planar surface portion and configured to display an image; and

a second pixel disposed at the curved surface portion and configured to display an image,

wherein an area of the first pixel is larger than an area of the second pixel.