Organic light emitting diode display
View Patent ↗An organic light emitting diode display device constructed with an organic light emitting element including a first electrode, an organic emission layer, and a second electrode sequentially laminated together, a transmittance control layer formed on the organic light emitting element, a selective reflective layer formed on the transmittance control layer, a polarizing plate formed on the selective reflective layer, and a phase retardation plate disposed between the organic light emitting element and the polarizing plate.
1. An organic light emitting diode (OLED) display device, comprising:
an organic light emitting element comprising a first electrode, an organic emission layer, and a second electrode sequentially laminated together;
a transmittance control layer formed on the organic light emitting element;
a selective reflective layer formed on the transmittance control layer;
a polarizing plate formed on the selective reflective layer; and
a phase retardation plate disposed between the organic light emitting element and the polarizing plate, wherein
the transmittance control layer is made of a resin containing a light absorption material, and the light absorption material comprises at least one of a polyene-based pigment, an azo-based pigment, a quinine-based pigment, an indigo-based pigment, and a quinacridone-based pigment; and
the polyene-based pigment includes at least one of compounds of the following Chemical Formulas 1 and 2:
the azo-based pigment includes a compound of the following Chemical Formula 3:
the quinacridone-based pigment includes at least one of compounds of the following Chemical Formulas 4 and 5:
the quinine-based pigment includes at least one of compounds of the following Chemical Formulas 6 to 8:
the indigo-based pigment includes at least one of compounds of the following Chemical Formulas 9 to 11:
2. The organic light emitting diode display device of claim 1 , wherein
the selective reflective layer is a cholesteric liquid crystal layer, and
the phase retardation plate is disposed between the polarizing plate and the cholesteric liquid crystal layer.
3. The organic light emitting diode display device of claim 2 , wherein
the cholesteric liquid crystal layer passes one of left circular polarized light and right circular polarized light and reflects the other one of the left circular polarized light and the right circular polarized light.
4. The organic light emitting diode display device of claim 3 , wherein
light that is linearly polarized through the polarizing plate is converted into circular polarized light while passing through the phase retardation plate.
5. The organic light emitting diode display device of claim 4 , wherein
the phase retardation plate is a ¼ wavelength plate, and
an intersection angle between an optical axis of the phase retardation plate and a polarization axis of the polarizing plate is 45 degrees.
6. The organic light emitting diode display device of claim 1 , wherein
the selective reflective layer is a dual brightness enhancement film, and
the phase retardation plate is disposed between the organic light emitting element and the transmittance control layer or between the transmittance control layer and the dual brightness enhancement film.
7. The organic light emitting diode display device of claim 6 , wherein
the polarizing plate has the same polarization axis as the polarization axis of the dual brightness enhancement film.
8. The organic light emitting diode display device of claim 7 , wherein
light that is linearly polarized through the dual brightness enhancement film is converted into the circular polarized light while passing through the phase retardation plate.
9. The organic light emitting diode display device of claim 8 , wherein
the phase retardation plate is the ¼ wavelength plate, and
the intersection angle between the optical axis of the phase retardation plate and the polarization axis of the polarizing plate is 45 degrees.
10. The organic light emitting diode display device of claim 1 , wherein
transmittance of light of the transmittance control layer is controlled depending on the kind and content of the light absorption material.
11. The organic light emitting diode display device of claim 1 , wherein
the transmittance control layer has a selective transmittance for each wavelength band of light.
12. The organic light emitting diode display device of claim 1 , wherein
the resin includes at least one of polycarbonate, polymethyl methacrylate (PMMA), polyether sulfone (PES), polyethylene terephthalate (PET), and triacetate cellulose (TAC).
13. An organic light emitting diode (OLED) display device, comprising:
an organic light emitting element comprising a first electrode, an organic emission layer, and a second electrode sequentially laminated together;
a transmittance control layer formed on the organic light emitting element;
a selective reflective layer formed on the transmittance control layer;
a polarizing plate formed on the selective reflective layer; and
a phase retardation plate disposed between the organic light emitting element and the polarizing plate, wherein
the transmittance control layer is made of a resin containing a light absorption material, and the light absorption material comprises aromatic hydrocarbons, the aromatic hydrocarbons comprise at least one of compounds of Chemical Formulas 12 to 18: