Method of manufacturing display unit with a second electrode formed to extend across a bezel region
View Patent ↗A display unit includes a display panel including a display region and a terminal region on a first substrate, the display region including a plurality of pixels, each of the plurality of pixels including a light emitting element, and the terminal region including a plurality of terminals at a part of a peripheral region of the display region. The light emitting element includes a first electrode, an organic layer, and a second electrode that is provided commonly to the plurality of pixels, in order from the first substrate side. The second electrode extends, continuously in a plan view, to an end of the first substrate in a region on the first substrate except for the terminal region, and is configured to be electrically disconnected from an exterior member of the display panel.
1. A method of manufacturing a display unit, comprising:
forming a display panel including a display region and a terminal region, the display region including a plurality of pixels, each of the plurality of pixels including a light emitting element, and the terminal region including a plurality of terminals at a part of a peripheral region of the display region; and
forming, as the light emitting element, a first electrode, an organic layer, and a second electrode on a first substrate, the second electrode being common to the plurality of pixels, wherein
the second electrode is formed to extend, continuously in a plan view, to cover the display region and the second electrode is also formed to extend across a bezel region between the display region and an edge portion of the display panel at three sides, and the second electrode is formed to be electrically disconnected from an exterior member of the display panel.
2. The method according to claim 1 , wherein
the second electrode is formed on the first substrate with use of a film formation mask including an opening, and
the opening is provided over an entire region on the first substrate except for the terminal region.
3. The method according to claim 1 , wherein
a plurality of the display regions are formed along one direction on the first substrate with use of a film formation mask including one opening for the plurality of display regions.
4. The method according to claim 1 , wherein
the second electrode is covered with an insulating film provided at the end of the first substrate.
5. The method according to claim 1 , further comprising
forming an inverse-tapered structure at a part of the peripheral region before forming the second electrode, wherein
the second electrode is electrically discontinuous while being continuous in a plan view by forming the second electrode on the first substrate with the structure in between.
6. The method according to claim 1 , wherein
the display panel includes the first substrate and a second substrate that is provided oppositely to the first substrate and seals the light emitting element, and
the second electrode is disposed inside an outermost end of one or both of the first substrate and the second substrate.
7. The method according to claim 6 , wherein
one or both of the first substrate and the second substrate each have a tapered end surface.
8. The method according to claim 6 , wherein the second electrode is disposed inside the outermost end of one or both of the first substrate and the second substrate.
9. The method according to claim 1 , wherein
the second electrode is a transparent conductive film.
10. The method according to claim 1 , further comprising
forming an organic insulating film as an interlayer insulating film or a pixel separation film, the organic insulating film including a separation groove in the peripheral region, and the organic insulating film including an end located inside the end of the first substrate.
11. The method according to claim 1 , wherein the second electrode is formed not to extend across the bezel region at one side where the terminal region is formed.