Display device and manufacturing method thereof
A display device including: electrodes on a base layer; an insulating layer on the electrodes and including a first protruding pattern and a second protruding pattern; light emitting elements on the insulating layer, a light emitting element from among the light emitting elements including a first end and a second end, wherein the light emitting elements include a first light emitting element, the first end of the first light emitting element being adjacent to the first protruding pattern, and the second end of the first light emitting element being adjacent to the second protruding pattern; a first connecting electrode electrically connected to the first end of the first light emitting element and including a first base portion and first protruding portions connected to the first base portion; and a second connecting electrode electrically connected to the second end of the first light emitting element.
1 . A display device comprising:
electrodes on a base layer;
an insulating layer on the electrodes and comprising a first protruding pattern and a second protruding pattern;
light emitting elements on the insulating layer, a light emitting element from among the light emitting elements comprising a first end and a second end, wherein the light emitting elements comprise a first light emitting element, the first end of the first light emitting element being adjacent to the first protruding pattern, and the second end of the first light emitting element being adjacent to the second protruding pattern;
a first connecting electrode electrically connected to the first end of the first light emitting element and comprising a first base portion and first protruding portions connected to the first base portion; and
a second connecting electrode electrically connected to the second end of the first light emitting element and comprising a second base portion and second protruding portions connected to the second base portion,
wherein the light emitting elements comprise a first surface having a first area at the first end and a second surface having a second area smaller than the first area at the second end,
wherein the first protruding pattern comprises first protruding spacing patterns spaced from each other by a first distance with one of the first protruding portions therebetween,
wherein the second protruding pattern comprises second protruding spacing patterns spaced from each other by a second distance with one of the second protruding portions therebetween, and
wherein the first distance is greater than the second distance.
2 . The display device of claim 1 , wherein the light emitting element comprises:
a first semiconductor layer adjacent to the first end and comprising a p-type semiconductor; a second semiconductor layer adjacent to the second end and comprising an n-type semiconductor; and an active layer between the first semiconductor layer and the second semiconductor layer,
wherein the light emitting element has an asymmetrical shape with respect to a direction from the first end toward the second end.
3 . The display device of claim 1 , wherein the first protruding portions and the second protruding portions respectively form pairs.
4 . The display device of claim 3 , wherein:
the first protruding portion overlaps the first end of the light emitting element in a plan view; and
the second protruding portion overlaps the second end of the light emitting element in the plan view.
5 . The display device of claim 1 , further comprising a first power line configured to supply a first power voltage to the first light emitting element; and a second power line configured to supply a second power voltage different from the first power voltage to the first light emitting element,
wherein the first connecting electrode electrically connects the first power line and the first end of the first light emitting element, and the second connecting electrode electrically connects the second power line and the second end of the first light emitting element.
6 . The display device of claim 5 , wherein:
the first end of the first light emitting element contacts the first protruding portion without physically contacting the first base portion; and
the second end of the first light emitting element contacts the second protruding portion without physically contacting the second base portion.
7 . The display device of claim 1 , wherein:
the first protruding spacing patterns form a first groove area;
the second protruding spacing patterns form a second groove area;
the insulating layer comprises a first insulating film covering the electrodes;
a portion of the first end of the first light emitting element contacts the first insulating film in the first groove area; and
a portion of the second end of the first light emitting element contacts the first insulating film in the second groove area.
8 . The display device of claim 1 , wherein:
the first protruding spacing patterns are between the first protruding portions; and
the second protruding spacing patterns are between the second protruding portions.
9 . The display device of claim 1 , wherein:
one of the first protruding spacing patterns is between the first protruding portions; and
one of the second protruding spacing patterns is between the second protruding portions.
10 . The display device of claim 9 , wherein:
the first protruding spacing patterns have a first length;
the second protruding spacing patterns have a second length; and
the first length is smaller than the second length.
11 . The display device of claim 1 , wherein one or more of the first protruding spacing patterns and one or more of the second protruding spacing patterns are integrally formed to provide a protruding spacing pattern extending in a direction from the first end toward the second end.
12 . The display device of claim 11 , wherein:
the protruding spacing pattern has a trapezoidal shape; and
a diagonal direction in which a side surface of the protruding spacing pattern extends is same as a diagonal direction in which a side surface of the first light emitting element extends.
13 . The display device of claim 1 , wherein:
the light emitting elements comprise a second light emitting element, wherein the first end of the second light emitting element facing the second connecting electrode and the second end of the second light emitting element facing the first connecting electrode; and
the second light emitting element do not correspond to a pair formed by the first protruding spacing patterns and the second protruding spacing patterns, and do not electrically connect the first connecting electrode and the second connecting electrode.
14 . The display device of claim 1 , wherein:
the light emitting elements comprise a third light emitting element, the first end of the third light emitting element facing the second connecting electrode and the second end of the third light emitting element facing the first connecting electrode; and
the third light emitting element is physically spaced from the second base portion, and do not electrically connect the first connecting electrode and the second connecting electrode.
15 . The display device of claim 14 , wherein:
the insulating layer comprises a first insulating film covering the electrodes;
a diameter of the first end of the third light emitting element is smaller than a distance between the second protruding spacing patterns adjacent to each other; and
a portion adjacent to the first end of the third light emitting element is on the adjacent second protruding spacing patterns to be spaced from the first insulating film.
16 . The display device of claim 15 , wherein:
the second connecting electrode comprises an isolated portion physically spaced from the second base portion; and
the third light emitting element contacts the isolated portion.
17 . A manufacturing method of a display device, comprising:
patterning electrodes on a base layer;
disposing an insulating layer on the electrodes;
disposing light emitting elements on the insulating layer; and
patterning connecting electrodes such that one or more of the connecting electrodes are electrically connected to the light emitting elements,
wherein the disposing of the insulating layer comprises disposing a first insulating film covering the electrodes, a first protruding pattern, and a second protruding pattern;
wherein the first protruding pattern comprises first protruding spacing patterns that are spaced from each other by a first distance;
wherein the second protruding pattern comprises second protruding spacing patterns that are spaced from each other by a second distance;
wherein the patterning of the connecting electrodes comprises: patterning a first base portion and first protruding portions connected to the first base portion; and
patterning a second base portion and second protruding portions connected to the second base portion;
wherein the first protruding portions are between the first protruding spacing patterns adjacent to each other;
wherein the second protruding portions are between the second protruding spacing patterns adjacent to each other;
wherein the light emitting element comprises a first end and a second end, and has an asymmetrical shape with respect to a direction from the first end toward the second end; and
wherein the first distance is larger than the second distance.
18 . The manufacturing method of the display device of claim 17 , wherein:
the disposing of the light emitting elements comprises: supplying an alignment signal to the electrodes, and aligning the light emitting elements based on an electric field according to the alignment signal; and
the patterning of the connecting electrodes is performed after the patterning of the electrodes.
19 . The manufacturing method of the display device of claim 17 , wherein:
the disposing of the light emitting elements comprises: disposing first light emitting elements; disposing second light emitting elements; and disposing third light emitting elements;
the disposing of the second light emitting elements comprises disposing the second light emitting elements such that they do not correspond to pairs formed by the first protruding portions and the second protruding portions; and
the disposing of the third light emitting elements comprises disposing the first end of the third light emitting elements to be directed to the second base portion and the second end of the third light emitting elements to be directed to the first base portion.
20 . The manufacturing method of the display device of claim 19 , wherein:
the patterning of the connecting electrodes comprises patterning an isolated portion to be adjacent to the first end of the third light emitting elements; and
the isolated portion is physically spaced from the second base portion.