Organic light emitting display apparatus
An organic light emitting display apparatus wherein a shift of white light caused by a viewing angle is reduced by adjusting an offset distance between one end of a corresponding emission region and one end of the black matrix adjacent to the one end of the corresponding emission region, thereby preventing a white color shift phenomenon at various viewing angles. Accordingly, a certain image is produced regardless of a use environment of a user's viewing angle.
1. An organic light emitting display apparatus comprising:
a first substrate;
a second substrate opposing the first substrate;
a display unit disposed at a surface facing the second substrate among surfaces of the first substrate, and comprising a plurality of emission regions in which a plurality of organic light emitting diodes (OLEDs) are respectively disposed, each emission region comprising a resonance structure comprising a reflective pixel electrode and a semi-transmissive opposite electrode having an optical distance therebetween configured to satisfy an interference condition for light of a selected wavelength to provide a microcavity effect;
a black matrix disposed at a surface facing the first substrate among surfaces of the second substrate, and comprising light blocking elements in a single plane overlapping a peripheral region of a corresponding emission region; and
a plurality of color filters disposed adjacent to the light blocking elements of the black matrix in correspondence with the plurality of emission regions,
wherein a single set offset distance between one end of an emission region and one end of the light blocking element of the black matrix adjacent to the one end of the emission region for all ends of the emission region is different for selected emission regions to reduce a shift of white light caused by a viewing angle.
2. The organic light emitting display apparatus of claim 1 , wherein the display unit further comprises a pixel defining layer, and each of the plurality of emission regions is defined by the pixel defining layer.
3. The organic light emitting display apparatus of claim 1 , wherein the viewing angle is in a range of 0 degrees to 60 degrees.
4. The organic light emitting display apparatus of claim 2 , wherein the plurality of color filters comprise a red color filter, a green color filter, and a blue color filter, and are configured to generate the white light in a color mixing method.
5. The organic light emitting display apparatus of claim 4 , wherein a first offset distance of a red emission region is greater than a second offset distance of a green emission region and a third offset distance of a blue emission region.
6. The organic light emitting display apparatus of claim 4 , wherein one offset distance selected from one of a second offset distance of a green emission region and a third offset distance of a blue emission region is the same as a first offset distance of a red emission region, and the other offset difference is less than the first offset distance.
7. The organic light emitting display apparatus of claim 4 , wherein an inflection wavelength of a spectroscopic spectrum of the red color filter is in a range of 615 nm to 640 nm.
8. The organic light emitting display apparatus of claim 4 , wherein one or more of ends of the light blocking element of the black matrix disposed adjacent to both ends of a red emission region comprise an inclined portion.
9. The organic light emitting display apparatus of claim 7 , wherein an offset distance of each of a red emission region, a green emission region, and a blue emission region is determined based on the inflection wavelength of the spectroscopic spectrum of the red color filter.
10. The organic light emitting display apparatus of claim 8 , wherein the shift of the white light is adjusted based on an inclined angle of the inclined portion.