Display device and method of manufacturing display device
A display device includes a base member, a thin film transistor, an organic insulation film, a light-emitting layer, and a sealing layer. The display device has an active area and a non-active area. The non-active area includes a notched portion and a protrusion portion surrounding the notched portion and having, on a notched portion side, a side face including a reverse-tapered face. The light-emitting layer is disconnected as a result of a step at the protrusion portion. A filling material is embedded in at least a part of a space located between the reverse-tapered face and a top face of the organic insulation film. The top face overlaps the reverse-tapered face in a plan view.
1 . A display device comprising:
a base member;
a thin film transistor layer formed on the base member, the thin film transistor layer having a thin film transistor and an organic insulation film formed on the thin film transistor;
a light-emitting layer formed on the thin film transistor layer, the light-emitting layer including a first electrode, a second electrode, an electroluminescence light-emitting layer positioned between the first electrode and the second electrode, and an organic film covering an edge of the first electrode; and
a sealing layer formed on the light-emitting layer,
the display device having:
an active area that contributes to display in a plan view;
a non-active area surrounded by the active area in the plan view; and
a notched portion formed in the non-active area in the plan view, the notched portion being a portion where the base member, the thin film transistor layer, the light-emitting layer, and the sealing layer are removed,
the non-active area including:
a protrusion portion formed between the active area and the notched portion, the protrusion portion surrounding the notched portion and having, on a notched portion side, a side face including a reverse-tapered face, the protrusion portion further being formed on the thin film transistor layer,
wherein:
the organic film is formed between the protrusion portion and the thin film transistor layer,
the organic film directly contacts the protrusion portion,
a filling material is embedded in at least a part of a space located between the reverse-tapered face and a top face of the organic film,
the top face overlaps the reverse-tapered face in the plan view,
the sealing layer includes a first inorganic sealing film, an organic sealing film, and a second inorganic sealing film, all of which are provided in this stated order from a side of the light-emitting layer,
the first inorganic sealing film covers the reverse-tapered face,
the second inorganic sealing film covers the filling material,
the filling material has a refractive index from 1.5 to 2.0, both inclusive, and
the filling material is formed of a material different from a material forming the organic sealing film and a material forming the organic film.
2 . The display device according to claim 1 , wherein, in a cross-section perpendicular to the reverse-tapered face and the top face of the organic film, a ratio of a cross-sectional area of the filling material to a cross-sectional area of the space is greater than or equal to 50%.
3 . The display device according to claim 1 , wherein the filling material and the protrusion portion differ in refractive index by less than 0.5.
4 . The display device according to claim 1 , wherein
the filling material and the organic film differ in refractive index by less than 0.5.
5 . The display device according to claim 1 , wherein
the filling material and the first inorganic sealing film differ in refractive index by less than 0.5.
6 . The display device according to claim 1 , wherein
the filling material and the second inorganic sealing film differ in refractive index by less than 0.5.
7 . The display device according to claim 1 , wherein the filling material has an optical concentration of 0.1 or greater.
8 . The display device according to claim 1 , wherein the filling material is a resin material.
9 . The display device according to claim 8 , wherein the resin material contains at least one of groups including polyurea, siloxane polymer, and acrylic.
10 . The display device according to claim 1 , wherein an external module is provided in the notched portion.
11 . The display device according to claim 1 , wherein
a slit is formed between the notched portion and the protrusion portion, the slit surrounding the notched portion, and
the slit is a portion where the thin film transistor layer, the light-emitting layer, and the sealing layer are removed.
12 . The display device according to claim 1 , wherein
the protrusion portion comprises a metal layer and a resist layer formed on the metal layer.
13 . The display device according to claim 1 , wherein
a metal layer is formed on the protrusion portion, and
the metal layer is made of the same material as the second electrode.
14 . The display device according to claim 1 , wherein
the protrusion portion has a second side face in proximity to the active area, the second side face including a reverse-tapered face.
15 . The display device according to claim 1 , wherein
a bank is formed in the non-active area, the bank surrounding the protrusion portion.