Light Emitting Diode Display Device with Built-In Touch Sensor

Patent metadata

Field	Value
Publication number	US-2025165092-A1
Application number	US-202418936929-A
Country	US
Kind code	A1
Filing date	Nov 4, 2024
Priority date	Nov 20, 2023
Publication date	May 22, 2025
Grant date	—

Abstract

A light emitting diode display device with a built-in touch sensor according to embodiments of the present disclosure may include a substrate, a driving transistor included in a subpixel, and including an active layer, a source electrode, a gate electrode and a drain electrode, a light emitting diode included in the subpixel, and including a first electrode and a second electrode, a driving voltage line including a reflective metal material, a first electrode connection pattern electrically connecting the driving voltage line and the first electrode, and including a transparent electrode material, a touch sensor electrode including the transparent electrode material, and a touch routing line electrically connected to the touch sensor electrode and disposed between the substrate and the touch sensor electrode.

First claim

What is claimed is:

1 . A light emitting diode display device with a built-in touch sensor comprising:
a substrate; a driving transistor included in a subpixel, the driving transistor including an active layer, a source electrode, a gate electrode, and a drain electrode; a light emitting diode included in the subpixel, the light emitting diode including a first electrode and a second electrode; a driving voltage line including a reflective metal material; a first electrode connection pattern electrically connecting the driving voltage line and the first electrode, the first electrode connection pattern including a transparent electrode material; a touch sensor electrode including the transparent electrode material; and a touch routing line electrically connected to the touch sensor electrode, the touch routing line between the substrate and the touch sensor electrode.

2 . The light emitting diode display device with a built-in touch sensor of claim 1 , further comprising:
a support layer on the driving voltage line; and an insulating layer on the support layer, wherein the light emitting diode is between the support layer and the insulating layer, and the first electrode connection pattern is on the insulating layer, wherein one end of the first electrode connection pattern is electrically connected to the first electrode through a contact hole of the insulating layer, and another end of the first electrode connection pattern is electrically connected to the driving voltage line through another contact hole of the insulating layer, wherein the touch sensor electrode is on the insulating layer, and the touch routing line is below the support layer, wherein the touch sensor electrode is electrically connected to the touch routing line through a contact hole of the insulating layer and the support layer.

3 . The light emitting diode display device with a built-in touch sensor of claim 1 , further comprising:
a first display connection pattern electrically connecting the source electrode or the drain electrode to the second electrode, the first display connection pattern including the reflective metal material.

4 . The light emitting diode display device with a built-in touch sensor of claim 1 , further comprising:
a storage capacitor including a first capacitor electrode and a second capacitor electrode overlapping with each other, wherein the first capacitor electrode is a pattern electrically connected to the gate electrode, and the second capacitor electrode is a pattern electrically connected to the source electrode, wherein the storage capacitor is on the driving transistor.

5 . The light emitting diode display device with a built-in touch sensor of claim 4 , wherein the storage capacitor overlaps with at least a portion of the active layer, and overlaps with at least a portion of the source electrode.

6 . The light emitting diode display device with a built-in touch sensor of claim 1 , further comprising:
a light shielding pattern between the substrate and the active layer, and overlapping with the active layer.

7 . The light emitting diode display device with a built-in touch sensor of claim 6 , wherein the touch routing line is on a same layer as the light shielding pattern.

8 . The light emitting diode display device with a built-in touch sensor of claim 7 , further comprising:
a touch connection structure electrically connecting the touch sensor electrode and the touch routing line, the touch connection structure including a first touch connection pattern comprising the reflective metal material.

9 . The light emitting diode display device with a built-in touch sensor of claim 8 , wherein the touch connection structure further includes a second touch connection pattern within a metal layer in which at least one of the gate electrode, the source electrode and the drain electrode is disposed.

10 . The light emitting diode display device with a built-in touch sensor of claim 1 , wherein the touch routing line includes the reflective metal material.

11 . The light emitting diode display device with a built-in touch sensor of claim 1 , further comprising:
a transparent area through which light is transmitted; and a non-transparent area that is different from the transparent area, wherein the touch sensor electrode is in the transparent area, wherein the non-transparent area includes a pixel area in which the light emitting diode and the driving transistor are disposed.

12 . The light emitting diode display device with a built-in touch sensor of claim 11 , wherein the touch routing line is in the non-transparent area,
wherein an area where the touch routing line is disposed in the non-transparent area is an area that is different from the pixel area or an area overlapping with the pixel area, wherein a part of the touch sensor electrode extends from the transparent area to the non-transparent area and is electrically connected to the touch routing line disposed in the non-transparent area, or a part of the touch routing line or an electrical pattern connected to the touch routing line extends from the non-transparent area to the transparent area and is electrically connected to the touch sensor electrode disposed in the transparent area.

13 . The light emitting diode display device with a built-in touch sensor of claim 1 , further comprising:
a plurality of first touch sensors and a plurality of second touch sensors, wherein the plurality of first touch sensors are arranged in a matrix form, wherein first touch sensors among the plurality of first touch sensors that are in a same row are electrically connected, wherein each of the plurality of first touch sensors is configured in a mesh form including a plurality of touch sensor electrodes connected to each other.

14 . The light emitting diode display device with a built-in touch sensor of claim 13 , wherein the first touch sensors that are in the same row are electrically connected and form a transmitting touch sensor line or a receiving touch sensor line,
wherein each of the plurality of second touch sensors forms the receiving touch sensor line or the transmitting touch sensor line.

15 . A light emitting diode display device with a built-in touch sensor comprising:
a substrate; a touch sensor including a plurality of touch sensor electrodes electrically connected to each other, the touch sensor including a transparent electrode material; a light emitting diode including a first electrode and a second electrode; and a driving transistor including an active layer, a source electrode, a gate electrode, and a drain electrode, wherein the touch sensor comprises a horizontal connection pattern connecting the plurality of touch sensor electrodes in a horizontal direction and including the transparent electrode material, and a vertical connection pattern connecting the plurality of touch sensor electrodes in a vertical direction and including an opaque metal material.

16 . The light emitting diode display device with a built-in touch sensor of claim 15 , wherein the horizontal connection pattern is located on the vertical connection pattern.

17 . The light emitting diode display device with a built-in touch sensor of claim 15 , further comprising:
a transparent area where the plurality of touch sensor electrodes are disposed; and a pixel area where the light emitting diode is disposed.

18 . A display device comprising:
a substrate divided into a pixel area and a non-pixel area; a light emitting diode on the substrate

Assignees

• Lg Display Co Ltd

Inventors

• Lee Hwideuk
• Lee Byunghyun

Classifications

• G09F9/33

  being semiconductor devices, e.g. diodes · CPC title

• G09G3/3225

  using an active matrix · CPC title

• G09G3/32

  semiconductive, e.g. using light-emitting diodes [LED] · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title