Organic luminescent display device
View Patent ↗An organic electroluminescent display device of the invention includes an element substrate, an organic electroluminescent light-emitting element disposed on the element substrate, and a sealing film disposed on the organic electroluminescent light-emitting element, wherein the organic electroluminescent light-emitting element includes an anode formed of metal and disposed on the element substrate, a light-emitting layer disposed on the anode, and a transparent cathode disposed on the light-emitting layer, and the sealing film includes a light-transmittance-reducing layer colored in black.
1. An organic electroluminescent display device comprising:
an element substrate;
a thin film transistor formed on the element substrate;
an insulation layer formed on the thin film transistor;
a plurality of organic electroluminescent light-emitting elements disposed on the insulation layer;
an insulation bank formed on the insulation layer, the insulation bank including a first bank and a second bank; and
a sealing film disposed on each of the organic electroluminescent light-emitting elements, the first insulation bank, and the second insulation bank,
wherein each of the organic electroluminescent light-emitting elements includes an anode disposed on the element substrate,
an organic layer including a light-emitting layer disposed on the anode, and
a transparent cathode disposed on the organic layer,
wherein each of the organic electroluminescent light-emitting elements is arranged between the first bank and the second bank,
wherein the sealing film includes a light-transmittance-reducing layer colored in black to form a gray filter,
wherein the gray filter is configured to spread continuously from a first region above the first bank to a second region above the second bank through a third region above each of the organic electroluminescent light-emitting elements,
wherein the gray filter covers the plurality of organic electroluminescent light-emitting elements if plan view, and
wherein the gray filter is configured to attenuate light transmitting from each of the organic electroluminescent light-emitting elements while letting the light pass outside of the organic electroluminescent display device.
2. The organic electroluminescent display device according to claim 1 , wherein an upper surface of the sealing film is covered with an antireflection film.
3. The organic electroluminescent display device according to claim 2 , wherein the antireflection film is comprised of a single-layer film.
4. The organic electroluminescent display device according to claim 2 , wherein the antireflection film is comprised of a multi-layer film.
5. The organic electroluminescent display device according to claim 1 , wherein the sealing film includes
a first sealing layer covering a lower surface of the light-transmittance-reducing layer, and
a second sealing layer covering an upper surface of the light-transmittance-reducing layer.
6. The organic electroluminescent display device according to claim 1 , wherein the sealing film contains silicon nitride.
7. The organic electroluminescent display device according to claim 1 , wherein the light-transmittance-reducing layer contains chromium.
8. The organic electroluminescent display device according to claim 7 , wherein the light-transmittance-reducing layer further contains chromium oxide.
9. The organic electroluminescent display device according to claim 7 , wherein
in each of the organic electroluminescent light-emitting elements, the anode is connected to the organic layer and the organic layer is connected to the transparent cathode, and
outside the organic electroluminescent light-emitting element, the anode and the organic layer is separated by the insulation bank.