Display panel apparatus and method of fabricating display panel apparatus
View Patent ↗A method of fabricating a display panel apparatus, includes forming a TFT layer, forming a planarizing film, forming a lower electrode, an electrode plate, and an auxiliary electrode, forming banks, forming the organic EL layer, and forming an upper electrode. The electrode plate has an opening exposing a portion of a surface of the planarizing film. In at least one of the forming of the lower electrode, the electrode plate and the auxiliary electrode, and the forming of the banks, the opening of the electrode plate outgasses the planarizing film. The electrode plate has a power supply that receives current through the electrode plate. The opening extends in parallel with a side of the display near the opening. Current flowing between the power supply and a portion connecting the auxiliary electrode and the electrode plate flows along an extending direction of the opening.
1. A method of fabricating a display panel apparatus, comprising:
forming a TFT layer including a driver element which causes an organic EL layer, containing an organic luminescent material, to emit light;
forming a planarizing film which planarizes an upper surface of the TFT layer;
forming a lower electrode in a display of a display panel above the planarizing film, an electrode plate in a region around the display of the display panel above the planarizing film, and an auxiliary electrode outside of a region in which the lower electrode is formed in the display of the display panel above the planarizing film, the auxiliary electrode being electrically insulated from the lower electrode and electrically connected to the electrode plate;
forming, above the lower electrode, banks for partitioning pixels;
forming the organic EL layer in regions partitioned by the banks; and
forming, above the organic EL layer, an upper electrode for causing the organic layer to emit light by a current supply to and from the lower electrode, the upper electrode being electrically connected to the auxiliary electrode,
wherein the electrode plate has an opening exposing a portion of a surface of the planarizing film,
in at least one of the forming of the lower electrode, the electrode plate and the auxiliary electrode, and the forming of the banks, the opening of the electrode plate outgasses the planarizing film,
the electrode plate has a power supply that receives current through the electrode plate, and
the opening extends in parallel with a side of the display near the opening, and
current flowing between the power supply and a portion connecting the auxiliary electrode and the electrode plate flows along an extending direction of the opening.
2. The method of fabricating a display panel apparatus according claim 1 ,
wherein at least one of the forming of the lower electrode, the electrode plate and the auxiliary electrode, and the forming of the banks includes a heat treatment, and
with the heat treatment in the at least one of the forming of the lower electrode, the electrode plate and the auxiliary electrode, and the forming of the banks, the opening of the electrode plate outgasses the planarizing film.
3. The method of fabricating a display panel apparatus according to claim 2 ,
wherein the heat treatment in the forming of the lower electrode, the electrode plate and the auxiliary electrode comprises annealing the lower electrode, the electrode plate, and the auxiliary electrode.
4. The method of fabricating a display panel apparatus according to claim 2 ,
wherein the heat treatment in the forming of the banks comprises annealing the banks.
5. The method of fabricating a display panel apparatus according to claim 1 , further comprising
forming a pixel regulating layer that partitions the pixels above the lower electrode, the electrode plate, and the auxiliary electrode, the pixel regulating layer being formed after the lower electrode, the electrode plate, and the auxiliary electrode are formed, and before the banks are formed.
6. The method of fabricating a display panel apparatus according to claim 5 ,
wherein the upper electrode comprises a cathode,
the lower electrode comprises an anode, and
the method of fabricating the display panel apparatus further comprises
forming, between the lower electrode and the organic EL layer, a hole injection layer that injects holes from the lower electrode to the organic EL layer, the hole injection layer being formed after the pixel regulating layer is formed and before the banks are formed,
wherein the forming of the hole injection layer includes a heat treatment, and
with the heat treatment in the forming of the hole injection layer, the opening of the electrode plate outgasses the planarizing film.
7. The method of fabricating a display panel apparatus according to claim 6 ,
wherein the heat treatment in the forming of the hole injection layer comprises annealing the hole injection layer.
8. The method of fabricating a display panel apparatus according claim 1 ,
wherein the upper electrode comprises a cathode,
the lower electrode comprises an anode, and
the method of fabricating the display panel apparatus further comprises
forming, between the upper electrode and the organic EL layer, an electron transport layer that transports electrons from the upper electrode to the organic EL layer, the electron transport layer being formed after the organic EL layer is formed and before the upper electrode is formed.