Display device and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-2017192322-A1
Application number	US-201615337420-A
Country	US
Kind code	A1
Filing date	Oct 28, 2016
Priority date	Jan 6, 2016
Publication date	Jul 6, 2017
Grant date	—

Abstract

A display device includes: a first substrate; a gate line on the first substrate, where the gate line extends in a first direction; a data line on the first substrate, where the data line extends in a second direction which intersects the first direction; a thin film transistor connected to the gate line and the data line; a passivation layer on the gate line, the data line and the thin film transistor, where the passivation layer includes a recessed portion; a light blocking portion on the recessed portion of the passivation layer; a main column spacer which protrudes upwardly from the light blocking portion; and a sub-column spacer which protrudes upwardly from the light blocking portion, where the sub-column spacer is spaced apart from the main column spacer.

First claim

What is claimed is:

1 . A display device comprising:
a first substrate; a gate line on the first substrate, wherein the gate line extends in a first direction; a data line on the first substrate, wherein the data line extends in a second direction which intersects the first direction; a thin film transistor connected to the gate line and the data line; a passivation layer on the gate line, the data line and the thin film transistor, wherein the passivation layer comprises a recessed portion; a light blocking portion on the recessed portion of the passivation layer; a main column spacer which protrudes in a third direction from the light blocking portion, wherein the third direction is perpendicular to the first and second directions; and a sub-column spacer which protrudes in the third direction from the light blocking portion, wherein the sub-column spacer is spaced apart from the main column spacer.

2 . The display device as claimed in claim 1 , wherein the main column spacer has a height greater than a height of the sub-column spacer with respect to a surface of the light blocking portion.

3 . The display device as claimed in claim 1 , wherein the light blocking portion, the main column spacer and the sub-column spacer comprise a same material as each other.

4 . The display device as claimed in claim 1 , wherein the recessed portion has a depth in a range of about 10% to about 200% of a thickness of the light blocking portion.

5 . The display device as claimed in claim 1 , wherein the light blocking portion has a thickness in a range of about 0.5 micrometer to about 2.5 micrometers.

6 . The display device as claimed in claim 1 , wherein at least a portion of the recessed portion overlaps at least one of the gate line and the data line.

7 . The display device as claimed in claim 1 , wherein at least one of the main column spacer and the sub-column spacer overlaps the thin film transistor.

8 . The display device as claimed in claim 1 , further comprising:
a first color filter and a second color filter, which are between the first substrate and the passivation layer, wherein the second color filter has a color different from a color of the first color filter, wherein the first color filter and the second color filter overlap each other in a border area of the first color filter and the second color filter, and at least a portion of the recessed portion is defined to overlap the border area of the first color filter and the second color filter.

9 . The display device as claimed in claim 1 , further comprising:
a second substrate on the light blocking portion to oppose the first substrate; and a liquid crystal layer between the first substrate and the second substrate.

10 . A display device comprising:
a first substrate; a first color filter on the first substrate; a second color filter on the first substrate, wherein the second color filter has a color different from a color of the first color filter; a passivation layer on the first color filter and the second color filter, wherein the passivation layer comprises a recessed portion; and a light blocking portion on the recessed portion of the passivation layer, wherein the first color filter and the second color filter overlap each other in a border area thereof, and at least a portion of the recessed portion overlaps the border area in which the first color filter and the second color filter overlap each other.

11 . The display device as claimed in claim 10 , wherein the recessed portion has a depth in a range of about 10% to about 200% of a thickness of the light blocking portion.

12 . The display device as claimed in claim 10 , further comprising:
a gate line between the first substrate and the passivation layer, wherein the gate line extends in a first direction; a data line between the first substrate and the passivation layer, wherein the data line extends in a second direction which intersects the first direction; and a thin film transistor connected to the gate line and the data line, wherein at least a portion of the recessed portion overlaps at least one of the gate line and the data line.

13 . The display device as claimed in claim 12 , further comprising:
a main column spacer which protrudes in a third direction from the light blocking portion, wherein the third direction is perpendicular to the first and second directions; and a sub-column spacer which protrudes in the third direction from the light blocking portion, wherein the sub-column spacer is spaced apart from the main column spacer.

14 . The display device as claimed in claim 13 , wherein the main column spacer is disposed to overlap the thin film transistor.

15 . A method of manufacturing a display device, the method comprising:
providing a thin film transistor on the first substrate; providing a passivation layer on the thin film transistor, wherein the passivation layer comprises a recessed portion; providing a light blocking portion on the recessed portion of the passivation layer; and providing a main column spacer and a sub-column spacer on the light blocking portion, wherein the main column spacer protrudes upwardly from the light blocking portion, and the sub-column spacer protrudes upwardly from the light blocking portion and is spaced apart from the main column spacer.

16 . The method as claimed in claim 15 , the providing the passivation layer comprises:
coating a first photosensitive composition on the thin film transistor; disposing a first exposure mask on the first photosensitive composition and irradiating light to the first photosensitive composition through the first exposure mask; and developing the first photosensitive composition after the irradiating the light thereto, wherein the first exposure mask comprises a transmissive pattern, a semi-transmissive pattern, and a blocking pattern.

17 . The method as claimed in claim 15 , wherein the providing the light blocking portion and the providing the main column spacer and the sub-column spacer are performed in a same process.

18 . The method as claimed in claim 17 , wherein the providing the light blocking portion and the providing the main column spacer and the sub-column spacer comprise:
coating a second photosensitive composition on the passivation layer; disposing a second exposure mask on the second photosensitive composition and irradiating light to the second photosensitive composition through the second exposure mask; and developing and curing the second photosensitive composition after the irradiating the light thereto wherein the second exposure mask comprises a transmissive pattern, a first semi-transmissive pattern, a second semi-transmissive pattern and a blocking pattern.

19 . The method as claimed in claim 15 , further comprising:
providing a color filter on the first substrate before the providing the passivation layer.

20 . The method as claimed in claim 19 , wherein the providing the color filter comprises:
providing a first color filter on the first substrate; and providing a second color filter on the first substrate, wherein the second color filter has a color different from a color of the first color filter, wherein the first color filter and the second color filter overlap each other in a border area thereof, and at least a portion of the recessed portion is provided to overlap the border area in which the first color filter and the second color filter overlap each other.

2

Assignees

• Samsung Display Co Ltd

Inventors

• Jung Yangho
• PARK Chulwon

Classifications

• G02F1/136209 Primary

  Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element · CPC title

• G02F1/136286

  Wiring, e.g. gate line, drain line · CPC title

• G02F1/13394

  spacers regularly patterned on the cell subtrate, e.g. walls, pillars (G02F1/133377 takes precedence) · CPC title

• G02F1/133512

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02F1/133345 Primary

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