Display panel and display apparatus

Patent metadata

Field	Value
Publication number	US-2016231844-A1
Application number	US-201614995539-A
Country	US
Kind code	A1
Filing date	Jan 14, 2016
Priority date	Feb 11, 2015
Publication date	Aug 11, 2016
Grant date	—

Abstract

Disclosed is a display panel including: a liquid crystal layer; and a polarization-touch sensing layer stacked on one side of the liquid crystal layer, the polarization-touch sensing layer comprising: a plurality of wire grid areas configured to polarize incident light from a light source the wire grid areas including grid patterns configured to transmit a plurality of touch sensing signals; and a plurality of seam areas arranged in between the plurality of wire grid areas and including a conductive area configured to transmit the touch sensing signal between a pair of adjacent grid patterns, and a nonconductive area configured to block the plurality of touch sensing signals from being transmitted between the pair of grid patterns.
Thus, the large-sized wire grid polarizer formed by the plurality of wire grid polarizer may be used to achieve the touch-screen panel, thereby reducing costs and simplifying the structure while manufacturing a large-sized display apparatus with a touch screen function.

First claim

What is claimed is:

1 . A display panel comprising:
a liquid crystal layer; and a polarization-touch sensing layer stacked on one side of the liquid crystal layer, the polarization-touch sensing layer comprising: a plurality of wire grid areas configured to polarize incident light from a light source, the plurality of wire grid areas including grid patterns configured to transmit a plurality of touch sensing signals; and a plurality of seam areas arranged in between the plurality of wire grid areas, the seam areas comprising a conductive area configured to transmit the touch sensing signals between a pair of adjacent grid patterns, and a nonconductive area configured to block touch sensing signals from being transmitted between the pair of adjacent grid patterns.

2 . The display panel according to claim 1 , wherein each of the plurality of grid patterns comprises a plurality of grid sub-groups configured to transmit the plurality of touch sensing signals.

3 . The display panel according to claim 2 , wherein the conductive area of the seam areas is arranged to correspond to each of the plurality of grid sub-groups and comprises the same material as the plurality of grid patterns, and
wherein the nonconductive area has a predetermined size configured to prevent the touch sensing signal from being transmitted between the pair of adjacent grid patterns having the nonconductive area disposed therebetween.

4 . The display panel according to claim 3 , wherein the plurality of grid patterns is formed on the plurality of wire grid areas by etching a metal layer of the polarization-touch sensing layer other than the conductive area.

5 . The display panel according to claim 1 , wherein the plurality of grid patterns are separated from each other with the nonconductive area being disposed therebetween, and
wherein the nonconductive area is formed on the plurality of seam areas by etching a metal layer of the polarization-touch sensing layer other than the conductive area.

6 . The display panel according to claim 1 , further comprising a black matrix arranged to overlap at least a part of the seam area.

7 . The display panel according to claim 2 , wherein the polarization-touch sensing layer further comprises a connection area corresponding to each of the plurality of grid sub-groups, wherein some grids of the grid sub-groups are connected to electrodes for outputting the touch sensing signal.

8 . The display panel according to claim 7 , wherein, in the connection area, the number of grids that are not connected to the electrodes, is determined based on reducing interference of the touch sensing signal between adjacent grids of the grid sub-group.

9 . The display panel according to claim 1 , further comprising a second polarization-touch sensing layer arranged opposite the polarization-touch sensing layer, and having the liquid crystal layer disposed between the polarization-touch sensing layer and the second polarization-touch sensing layer,
the second polarization-touch sensing layer comprising: a plurality of second wire grid areas configured to polarize incident light from a light source, the second wire grid areas including grid patterns configured to transmit a plurality of touch sensing signals; and a plurality of second seam areas arranged in between the plurality of second wire grid areas, the second seam areas comprising a conductive area configured to transmit the touch sensing signal between a pair of adjacent second grid patterns, and a nonconductive area configured to block the plurality of touch sensing signals from being transmitted between the pair of second grid patterns.

10 . The display panel according to claim 9 , wherein the second grid pattern of the second polarization-touch sensing layer is arranged orthogonally to the grid pattern of the polarization-touch sensing layer.

11 . A display apparatus comprising:
signal receiving circuitry configured to receive an image signal; a signal processor configured to process the received image signal; a display panel configured to display an image based on the processed image signal; and a controller configured to control the display apparatus to display the image, the display panel comprising: a liquid crystal layer; and a polarization-touch sensing layer stacked on one side of the liquid crystal layer, the polarization-touch sensing layer comprising: a plurality of wire grid areas configured to polarize incident light from a light source, the wire grid areas including grid patterns configured to transmit a plurality of touch sensing signals; and a plurality of seam areas arranged in between the plurality of wire grid areas, the seam areas comprising a conductive area configured to transmit the touch sensing signal between a pair of adjacent grid patterns, and a nonconductive area configured to block the plurality of touch sensing signals from being transmitted between the pair of grid patterns.

12 . The display apparatus according to claim 11 , wherein each of the plurality of grid patterns comprises a plurality of grid sub-groups configured to transmit the plurality of touch sensing signals.

13 . The display apparatus according to claim 12 , wherein the conductive area of the seam areas is arranged to correspond to each of the plurality of grid sub-groups and comprises the same material as the plurality of grid patterns, and
wherein the nonconductive area has a predetermined size configured to block the touch sensing signal from being transmitted between the pair of adjacent grid patterns having the nonconductive area disposed therebetween.

14 . The display apparatus according to claim 13 , wherein the plurality of grid patterns is formed on the plurality of wire grid areas by etching a metal layer of the polarization-touch sensing layer other than the conductive area.

15 . The display apparatus according to claim 11 , wherein the plurality of grid patterns are separated from each other with the nonconductive area being disposed therebetween, and
wherein the nonconductive area is formed on the plurality of seam areas by etching a metal layer of the polarization-touch sensing layer other than the conductive area.

16 . The display apparatus according to claim 11 , further comprising a black matrix arranged to overlap at least a part of the seam area.

17 . The display apparatus according to claim 12 , wherein the polarization-touch sensing layer further comprises a connection area corresponding to each of the plurality of grid sub-groups, wherein some grids of the grid sub-groups are connected to electrodes for outputting the touch sensing signal.

18 . The display apparatus according to claim 17 , wherein in the connection area, the number of grids that are not connected to the electrodes, is determined based on reducing interference of the touch sensing signal between adjacent grids of the grid sub-group.

19 . The display apparatus according to claim 11 , further comprising a second polarization-touch sensing layer arranged opposite the polarization-touch sensing layer,
the second polarization-touch sensing layer comprising: a plurality of second wire grid areas configured to polarize incident light from a light source, the second wire grid areas including grid patterns configured to transmit a plurality of touch sensing signals; and a plurality of second seam areas arranged in between the plurality of second wire grid areas, the second seam areas comprising a conductive area configured to transmit the touch sensing signa

Assignees

• Samsung Electronics Co Ltd

Inventors

• Lee Joo Won
• Kang Young Mo
• Sung Jun Ho
• Lee Dong Jun
• Jung Il Yong

Classifications

• G02B5/3058 Primary

  comprising electrically conductive elements, e.g. wire grids, conductive particles · CPC title

• G02F1/13338 Primary

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

• G02F2001/133548

  Physics · mapped topic

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title