Display device having light shielding pattern

Patent metadata

Field	Value
Publication number	US-11515338-B2
Application number	US-202016832796-A
Country	US
Kind code	B2
Filing date	Mar 27, 2020
Priority date	Apr 16, 2019
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

A display device includes: a substrate; an active layer; a first insulating layer on the active layer; a gate electrode; a second insulating layer on the first conductive layer; a second conductive layer on the second insulating layer; a third insulating layer on the second conductive layer; and a source electrode connected to the source region of the first active pattern through a contact hole passing through the first insulating layer and the second insulating layer, and a drain electrode connected to the drain region, wherein the first active pattern, the gate electrode, the source electrode and the drain electrode constitute a thin film transistor, the display device further comprising at least one light shielding pattern around the thin film transistor, wherein the light shielding pattern includes a side light shielding pattern such that the third conductive layer passes through at least the third insulating layer.

First claim

What is claimed is:

1. A display device comprising:
a substrate;
an active layer on the substrate, the active layer including a first active pattern including a source region, a drain region, and an active region between the source region and the drain region;
a first insulating layer on the active layer;
a first conductive layer on the first insulating layer and including a gate electrode;
a second insulating layer on the first conductive layer;
a second conductive layer on the second insulating layer;
a third insulating layer on the second conductive layer; and
a third conductive layer on the second insulating layer and including a source electrode connected to the source region of the first active pattern through a contact hole passing through the first insulating layer and the second insulating layer, and a drain electrode connected to the drain region of the first active pattern through a contact hole passing through the first insulating layer and the second insulating layer,
wherein the first active pattern, the gate electrode, the source electrode and the drain electrode constitute a thin film transistor,
the display device further comprising at least one light shielding pattern around the thin film transistor in a plan view,
wherein the light shielding pattern includes a side light shielding pattern such that a constituent material of the third conductive layer passes through at least the third insulating layer in a thickness direction and wherein a whole area of a bottom surface of the side light shielding pattern contacts at least one of the first insulating layer, the second insulating layer and the third insulating layer.

2. The display device of claim 1 , wherein the side light shielding pattern is formed such that the constituent material of the third conductive layer passes through the third insulating layer.

3. The display device of claim 2 , wherein the side light shielding pattern further passes through the second insulating layer in a thickness direction.

4. The display device of claim 3 , wherein the side light shielding pattern passes through a part of the first insulating layer to terminate inside the first insulating layer.

5. The display device of claim 1 , wherein the side light shielding pattern is formed using a halftone or slit mask.

6. The display device of claim 1 , wherein the thin film transistor is configured to be electrically connected to a driving transistor.

7. The display device of claim 1 , wherein the light shielding pattern is provided plurally, the second conductive layer includes a first data pattern, and the plurality of light shielding patterns include a first light shielding pattern such that a constituent material of the first data pattern passes through the third insulating layer.

8. The display device of claim 1 , further comprising:
a lower light shielding pattern between the substrate and the active layer,
wherein a planar size of the lower light shielding pattern is larger than a planar size of the active layer.

9. The display device of claim 8 , wherein the active layer and the lower light shielding pattern are formed using the same mask.

10. The display device of claim 8 , wherein the lower light shielding pattern completely covers the active layer.

11. The display device of claim 8 , wherein a planar shape of the lower light shielding pattern is the same as a planar shape of the active layer.

12. The display device of claim 8 , wherein the lower light shielding pattern includes a metal material.

13. The display device of claim 1 , wherein the substrate includes a display area where a plurality of pixels including the thin film transistor are positioned, and a non-display area around the display area,
the display device further comprising:
a lower cover panel below the substrate, and an optical sensor surrounded by the lower cover panel in the plan view and below the display area of the substrate.

14. The display device of claim 13 , wherein the display area includes an optical sensor arrangement region where the optical sensor is positioned and an optical sensor non-arrangement region where the optical sensor is not positioned, and
wherein the side light shielding pattern is on the optical sensor arrangement region and is not on the optical sensor non-arrangement region.

15. The display device of claim 13 , wherein the display area includes an optical sensor arrangement region where the optical sensor is positioned and an optical sensor non-arrangement region where the optical sensor is not positioned, and
wherein the side light shielding pattern is over the optical sensor arrangement region and the optical sensor non-arrangement region.

16. A display device comprising:
a display panel;
a lower panel sheet below the display panel; and
an optical sensor below the display panel and within the lower panel sheet in a plan view,
wherein the display panel includes:
a display substrate;
an active layer on the display substrate, the active layer including a first active pattern including a source region, a drain region, and an active region between the source region and the drain region;
a first insulating layer on the active layer;
a first conductive layer on the first insulating layer and including a gate electrode;
a second insulating layer on the first conductive layer;
a second conductive layer on the second insulating layer;
a third insulating layer on the second conductive layer; and
a third conductive layer on the second insulating layer and including a source electrode connected to the source region of the first active pattern through a contact hole passing through the first insulating layer and the second insulating layer, and a drain electrode connected to the drain region of the first active pattern through a contact hole passing through the first insulating layer and the second insulating layer,
wherein the first active pattern, the gate electrode, the source electrode and the drain electrode constitute a first transistor electrically connected to a driving transistor,
the display device further comprising a plurality of light shielding patterns around the first transistor in a plan view,
wherein the light shielding patterns include a side light shielding pattern such that a constituent material of the third conductive layer passes through at least the third insulating layer in a thickness direction and
wherein a whole area of a bottom surface of the side light shielding pattern contacts at least one of the first insulating layer, the second insulating layer and the third insulating layer.

17. The display device of claim 16 , wherein the side light shielding pattern is formed such that the constituent material of the third conductive layer passes through the third insulating layer.

18. The display device of claim 17 , wherein the side light shielding pattern further passes through the second insulating layer in a thickness direction.

19. The display device of claim 18 , wherein the side light shielding pattern passes through a part of the first insulating layer to terminate inside the first insulating layer.

20. The display device of claim 16 , wherein the display area includes an optical sensor arrangement region where the optical sensor is positioned and an optical sensor non-arrangement region where the optical sensor is not positioned, and
wherein the side light shielding pattern is on the optical sensor arrangement region and is not on the optical sensor non-arrangement region.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Dong Bum
• Kim Chui Ho
• Park Yun Hwan
• Bae In Jun
• Seo Woo Ri
• Jeon Jin

Classifications

• H10W42/20

  protecting against electromagnetic or particle radiation, e.g. light, X-rays, gamma-rays or electrons · CPC title

• G09G3/3233

  with pixel circuitry controlling the current through the light-emitting element · CPC title

• G09G2320/0214

  with crosstalk due to leakage current of pixel switch in active matrix panels · CPC title

• G09G2300/0814

  used for selection purposes, e.g. logical AND for partial update · CPC title

• G09G2360/14

  Detecting light within display terminals, e.g. using a single or a plurality of photosensors · CPC title