Display device
View Patent ↗When an alignment film is applied to the whole surface of a substrate, adhesion intensity between a sealing material and the alignment film is further deteriorated. A display device includes an array substrate having a first alignment film, a counter substrate having a second alignment film, a liquid crystal layer in contact with the first alignment film and the second alignment film, and a sealing material for bonding the first alignment film and the second alignment film together, wherein the sealing material is provided with a portion adapted to increase the area of the adhered portion.
1. A display device comprising:
an array substrate including a first alignment film;
a counter substrate including a second alignment film;
a liquid crystal layer in contact with the first alignment film and the second alignment film; and
a sealing material for bonding the first alignment film and the second alignment film together, wherein
the array substrate includes a flattening film under the first alignment film,
the flattening film includes a first groove and a second groove which is provided in connecting with a lower portion of the first groove and has a section with a width that is wider than the first groove in a direction of lateral surface of the first groove, and
the sealing material is filled in the first and second grooves.
2. The display device according to claim 1 , wherein a light shielding film is provided on a lateral surface and a bottom surface of the second groove.
3. The display device according to claim 2 ,
wherein the first alignment film is formed on the light shielding film of the second groove of the flattening film.
4. The display device according to claim 1 ,
wherein the light shielding film on the lateral surface of the second groove is made of Al, and
the light shielding film on the bottom surface of the second groove is made of Ti.
5. The display device according to claim 4 ,
wherein the light shielding film on the lateral surface of the second groove is 100 nm to 500 nm.
6. The display device according to claim 4 ,
wherein the ration with distance d from the lateral surface of the first groove to the Al edge face of the shielding film of the second groove and thickness of h of the Al of the shielding film is 0.5<d/h<1.
7. The display device according to claim 1 , wherein the first alignment film is subjected to rubbing orientation processing.
8. A display device comprising:
an array substrate including a first alignment film;
a counter substrate including a second alignment film;
a liquid crystal layer in contact with the first alignment film and the second alignment film;
a sealing material for bonding the first alignment film and the second alignment film together; and
a columnar spacer provided in the sealing material,
wherein the columnar spacer has such a cross sectional shape that a width on a side of the array substrate is larger than a width on a side of the counter substrate.
9. The display device according to claim 8 , wherein the columnar spacer has an inverted trapezoidal cross section.