Display device with connection interface for common signal lines placed under planarization layer

Patent metadata

Field	Value
Publication number	US-9910523-B2
Application number	US-201514979522-A
Country	US
Kind code	B2
Filing date	Dec 28, 2015
Priority date	Dec 28, 2015
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

A display of an electric device includes a plurality of separated transparent electrode blocks, which are configured to provide one or more of supplemental features such as touch recognition. Signal paths between the transparent electrode blocks and the driver for the supplemental features are implemented with a plurality of conductive lines positioned under one or more planarization layers. The conductive lines implementing the signal paths are routed across the display area, directly toward a non-display area where drive-integrated circuits are located.

First claim

What is claimed is:

1. A display panel, comprising:
a plurality of common signal lines on a substrate;
a lower planarization layer on the plurality of common signal lines, the lower planarization layer provided in a display area and a part of a non-display area;
a plurality of thin-film transistors, each of the thin-film transistors having a semiconductor layer, a gate, a source and a drain that are placed above the lower planarization layer;
a connection interface coupled with a touch driver, the connection interface placed in a part of the non-display area, which is not covered by the lower planarization layer;
an upper planarization layer on the plurality of thin-film transistors;
a layer of separated transparent electrode blocks on the upper planarization layer in the display area, each of the transparent electrode blocks having a dedicated signal path implemented with one or more of the common signal lines placed under the lower planarization layer; and
a plurality of touch link lines connecting said one or more of the common signal lines to the connection interface, and
wherein each of the plurality of touch link lines has a first portion covered under the lower planarization layer and a second portion that is not covered under the lower planarization layer, the first portion and the second portion of each of the touch link lines are connected via a contact hole through the lower planarization layer.

2. The display panel of claim 1 , wherein the plurality of touch link lines are formed of a same metal layer as the plurality of common signal lines.

3. The display panel of claim 1 , wherein the first portion of the touch link line is formed of a same metal as the plurality of common signal lines whereas the second portion of the touch link line is formed of a same metal as a plurality of gate lines.

4. The display panel of claim 1 , further comprising a plurality of data link lines routed from a connection interface coupled to a data driver to a plurality of data lines, wherein the connection interface for the data driver is placed in the part of the non-display area that is not covered by the lower planarization layer such that the each of the data link lines has a first portion routed on the lower planarization layer and a second portion routed in the part of the non-display area that is not covered by the lower planarization layer.

5. The display panel of claim 4 , wherein the first portions of at least some of the touch link lines are routed across the first portions of at least some of the data link lines.

6. The display panel of claim 4 , wherein the first portions of at least some of the touch link lines at least partially overlapping with the first portion of at least some of the data link lines.

7. The display panel of claim 1 , wherein the plurality of the common signal lines is formed of a first metal layer, wherein the gate of the TFTs is formed of a second metal layer, wherein the source and drain of the TFTs are formed of a third metal layer, and wherein the transparent electrode blocks are formed of a transparent metal oxide layer.

8. The display panel of claim 7 , wherein the first portion and the second portion of each of the plurality of touch link lines are formed of the first metal layer and the second metal layer, respectively.

9. The display panel of claim 8 , further comprising a plurality of data link lines routed from a connection interface coupled to a data driver to a plurality of data lines, wherein the connection interface for the data driver is placed in the part of the non-display area that is not covered by the lower planarization layer such that the each of the data link lines has a first portion routed on the lower planarization layer and a second portion routed in the part of the non-display area that is not covered by the lower planarization layer, and
wherein the first portion and the second portion of each of the plurality of data link lines are formed of the third metal layer.

10. The display panel of claim 8 , further comprising a plurality of data link lines routed from a connection interface coupled to a data driver to a plurality of data lines, wherein the connection interface for the data driver is placed in the part of the non-display area that is not covered by the lower planarization layer such that the each of the data link lines has a first portion routed on the lower planarization layer and a second portion routed in the part of the non-display area that is not covered by the lower planarization layer, and
wherein the first portion and the second portion of each of the plurality of data link lines are formed of the second metal layer and the third metal layer, respectively.

11. The display panel of claim 7 , wherein the connection interface coupled with the touch driver includes a plurality of pads, each of the pads including a stack of the second metal layer, the third metal layer and the transparent metal oxide layer.

12. The display panel of claim 7 , wherein the connection interface coupled with the data driver includes a plurality of pads, each of the pads including a stack of the third metal layer and the transparent metal oxide layer.

13. An electronic device with a display panel, comprising:
a plurality of gate lines and a plurality of data lines;
a layer of thin-film-transistors implementing an array of pixel circuitry arranged in a display area, each of the pixel circuitry provided with a thin-film-transistor connected to one of the gate lines and one of the data lines;
an organosiloxane hybrid planarization layer including Si—O monomer and polymer provided under the layer of thin-film-transistors, the plurality of gate lines and plurality of data lines;
a plurality of separated transparent electrode blocks provided above the layer of TFT array and arranged to overlap with the plurality of pixels in the display area;
a gate driver having a shift register implemented with a plurality of thin-film transistors in a non-display area;
a touch driver coupled to a connection interface provided in the non-display area; and
a plurality of common signal lines provided under the organosiloxane hybrid planarization layer, each of the common signal lines connected to a touch link line routed to the connection interface, wherein the plurality of common signal lines are configured to form a plurality of signal paths of which each signal path connects each one of the plurality of separated transparent electrode blocks to the touch driver,
wherein a portion of the plurality of common signal lines overlaps with a portion of the plurality of gate lines or the plurality of data lines.

14. The electronic device with a display of claim 13 , wherein the gate driver is configured to provide a scan signal on a first set of gate lines among the plurality of gate lines during a first display period and to provide the scan signal on a second set of gate lines that are subsequent to the gate lines of the first set during a second display period, the first display period and the second display period being parts of a single frame that are separated by an intermediate touch scan period during which no gate lines are provided with the scan signal.

15. The electronic device with a display of claim 14 , wherein the touch driver is configured to communicate with each of the separated transparent electrode blocks during the intermediate touch scan period to identify touch inputs made on the display.

16. The electronic device with a display of claim 14 , wherein the connection interface is provided in a part of the non-display area, which is not provided with t

Assignees

• Lg Display Co Ltd

Inventors

• Kim Jongbin
• Kim Tae Sang
• Jung Moonseok

Classifications

• H01L27/14636

  Electricity · mapped topic

• G02F1/133345

  Insulating layers (G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence) · CPC title

• G02F1/13338

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

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• H01L27/124

  Electricity · mapped topic