Touch sensor sheet, touch display panel, and display apparatus

Patent metadata

Field	Value
Publication number	US-10222925-B2
Application number	US-201514810743-A
Country	US
Kind code	B2
Filing date	Jul 28, 2015
Priority date	Aug 18, 2014
Publication date	Mar 5, 2019
Grant date	Mar 5, 2019

Abstract

A touch display panel including: a backlight unit including a plurality of light-emitting devices; and a touch sensor sheet disposed on the backlight unit, comprising at least one hole corresponding to at least one of the plurality of light-emitting devices and a touch sensor configured to sense a user touch on the touch display panel.

First claim

What is claimed is:

1. A touch display panel comprising:
a backlight unit including a plurality of light-emitting devices;
a touch sensor sheet disposed directly on an upper surface of the backlight unit, comprising a plurality of holes and a touch sensor configured to sense a user touch on the touch display panel; and
an LCD cell disposed on the touch sensor sheet.

2. The touch display panel as claimed in claim 1 , further comprising an optical sheet configured to transfer light emitted from the plurality of light-emitting devices,
wherein the touch sensor sheet is disposed between the optical sheet and the backlight unit.

3. The touch display panel as claimed in claim 1 , wherein a position and size of the at least one hole corresponds to a position and size of the at least one of the plurality of light-emitting devices.

4. The touch display panel as claimed in claim 1 , wherein the touch sensor has a predefined pattern in a region of the touch sensor sheet excluding the at least one hole.

5. The touch display panel as claimed in claim 4 , wherein the touch sensor sheet comprises:
at least one first touch sensor sheet having a touch sensor pattern of a first direction configured to sense an X-axis coordinate of the user touch; and
at least one second touch sensor sheet having a touch sensor pattern of a second direction crossing the first direction configured to sense a Y-axis coordinate of the user touch.

6. The touch display panel as claimed in claim 4 , wherein the predefined pattern comprises a pattern surrounding the at least one hole.

7. The touch display panel as claimed in claim 1 , wherein the backlight unit is a direct type backlight unit.

8. The touch display panel as claimed in claim 1 , wherein a color of the touch sensor sheet is white.

9. A display apparatus comprising:
a touch display panel; and
a driver configured to drive the touch display panel,
wherein the touch display panel comprises:
a backlight unit including a plurality of light-emitting devices;
a touch sensor sheet disposed directly on an upper surface of the backlight unit, and comprising a plurality of holes and a touch sensor configured to sense a user touch on the touch display panel; and
an LCD cell disposed on the touch sensor sheet.

10. The display apparatus as claimed in claim 9 , wherein
the touch display panel further comprises an optical sheet configured to transfer light emitted from the plurality of light-emitting devices, and
the touch sensor sheet is disposed between the optical sheet and the backlight unit.

11. The display apparatus as claimed in claim 9 , wherein a position and size of the at least one hole corresponds to a position and size of the at least one of the plurality of light-emitting devices.

12. The display apparatus as claimed in claim 9 , wherein the touch sensor has a predefined pattern in a region of the touch sensor sheet excluding the at least one hole.

13. The display apparatus as claimed in claim 12 , wherein the touch sensor sheet comprises:
at least one first touch sensor sheet having a touch sensor pattern of a first direction configured to sense an X-axis coordinate of the user touch; and
at least one second touch sensor sheet having a touch sensor pattern of a second direction crossing the first direction configured to sense a Y-axis coordinate of the user touch.

14. The display apparatus as claimed in claim 12 wherein the predefined pattern comprises a pattern surrounding the at least one hole.

15. The display apparatus as claimed in claim 9 , wherein the backlight unit is a direct type backlight unit.

16. The display apparatus as claimed in claim 9 , wherein a color of the touch sensor sheet is white.

17. A touch sensor sheet comprising:
a first substrate having a plurality of first holes formed therein; and
at least one electromagnetic induction (EMI) type touch sensor disposed on a region of the first substrate excluding the plurality of first holes.

18. The touch sensor sheet according to claim 17 , wherein the at least one EMI type touch sensor comprises at least one respective elongated sensing coil.

19. The touch sensor sheet according to claim 18 , wherein a portion of the at least one elongated sensing coil surrounding the at least one first hole has a greater thickness than a portion of the at least one elongated sensing coil not surrounding the at least one first hole.

20. The touch sensor sheet according to claim 17 , further comprising:
a second substrate having at least one second hole, a size and position of the at least one second hole corresponding to a size and position of the at least one first hole; and
at least one second touch sensor disposed on a region of the second substrate excluding the at least one second hole,
wherein a pattern of the at least on EMI type touch sensor formed on the first substrate differs from a pattern of the at least one second touch sensor formed on the second substrate.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Han Young-Ran
• Choi Kyoung-Oh

Classifications

• G06F3/046

  by electromagnetic means · CPC title

• G02F1/133603

  with LEDs · CPC title

• G06F3/047 Primary

  using sets of wires, e.g. crossed wires · CPC title

• G02F1/13338

  Input devices, e.g. touch panels · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title