Display device and method of manufacturing same
A display device includes a substrate, a circuit element layer and a bank region. The substrate includes a light emitting region and a non-light-emitting region. The light emitting region forms an opening region. The non-light-emitting region is adjacent to the light emitting region. The circuit element layer is formed in the non-light-emitting region. The bank layer covers a top of the circuit element layer. The bank layer is not formed in the light emitting region.
1. A display device comprising:
a substrate including:
a light emitting region; and
a non-light-emitting region adjacent to the light emitting region;
a storage capacitor formed in the non-light-emitting region on the substrate and having an upper electrode and a lower electrode;
a light absorption layer formed on the storage capacitor;
an anode electrode formed on the light absorption layer;
a first via hole formed in such a manner as to pass through the light absorption layer; and
a bank layer formed on the light absorption covering a top of the storage capacitor,
an overcoat layer formed of an organic material and formed between the light absorption layer and the bank layer and in the first via hole;
wherein the bank layer is not formed in the light emitting region, and
wherein the anode electrode is in direct contact with the upper electrode of the storage capacitor through the first via hole and the overcoat layer, and
wherein the light absorption layer includes a colorant capable of selectively transmitting incident light in substantially only one portion of a wavelength band by transmitting light in a first wavelength band and blocking light in a second wavelength band,
wherein the light absorption layer has a structure of at least a first absorption layer contains a pigment of a first color and a second absorption layer contains a pigment of a second color different from the first color stacked on top of each other.
2. The display device of claim 1 , further comprising:
a first conductive layer including the lower electrode of the storage capacitor and arranged on top of the substrate;
a buffer layer covering the first conductive layer;
an active layer arranged on top of the buffer layer;
a gate insulating layer covering the active layer; and
a second conductive layer including the upper electrode of the storage capacitor and being arranged on top of the gate insulating layer and including at least one electrode of a transistor.
3. The display device of claim 2 , further comprising:
a passivation layer arranged on top of the gate insulating layer; and
an overcoat layer arranged on top of the passivation layer,
wherein the passivation layer and the overcoat layer are formed on all regions of the substrate, the all regions including the light emitting region and the non-light-emitting region.
4. The display device of claim 3 , further comprising:
a light emitting layer arranged on top of the anode electrode; and
a cathode electrode arranged on top of the light emitting layer,
wherein the anode electrode is arranged on top of the overcoat layer, and
wherein the bank layer is interposed between the anode electrode and the light emitting layer.
5. The display device of claim 4 , further comprising:
a data line and a sensing line that extend in a direction of pixels arranged in columns, the pixels, in operation, displaying a white, red, green, or blue color,
wherein the data line or the sensing line is arranged between the columns in which the pixels are arranged.
6. The display device of claim 5 , wherein the anode electrode does not overlap the data line or the sensing line.
7. The display device of claim 3 , further comprising:
a color filter having the red, green, or blue color,
wherein the color filter is arranged in the light emitting region and is interposed between the passivation layer and the overcoat layer.
8. The display device of claim 2 , wherein the at least one transistor includes a drive transistor configured to control an amount of electric current flowing to the anode electrode, and
wherein the drive transistor comprises:
a source electrode being arranged on the second conductive layer and being electrically connected to a power line;
a gate electrode being included in the second conductive layer and being electrically connected to the lower electrode of the storage capacitor; and
a drain electrode being arranged on the second conductive layer and being electrically connected to the upper electrode of the storage capacitor.
9. The display device of claim 8 , wherein the passivation layer is interposed between the lower electrode of the storage capacitor and the upper electrode thereof.
10. The display device of claim 1 , where the bank layer is realized in a stripe pattern in the display device.
11. The display device of claim 1 , further comprising: wherein the overcoat layer is disposed between the anode electrode and the sidewall of the first via hole in the first via hole.
12. The display device of claim 8 , wherein the upper electrode of the storage capacitor is included in the second conductive layer, and
the gate electrode and the upper electrode of the storage capacitor are disposed on a same layer.