Polarizer film, and organic light emitting display apparatus providing the same
View Patent ↗An organic light emitting display apparatus includes a polarizer film arranged on a substrate or an encapsulation substrate that faces an image realized by a display unit, wherein the polarizer film includes a plurality of regions having different light transmittances. By using the polarizer film, a luminance difference due to a voltage drop may be compensated for so that a uniform luminance may be obtained when the image is realized.
1. An organic light emitting display apparatus comprising:
a substrate;
a display unit arranged on the substrate configured to realize an image;
a voltage applying unit configured to apply voltage to the display unit;
an encapsulation substrate which encapsulates and is longer than the display unit: and a polarizer film shorter than the encapsulation substrate comprising a plurality of regions arranged on and contacting the encapsulation substrate that faces the image realized by the display unit,
wherein the plurality of regions have substantially the same thickness and different nonzero light transmittances and comprise a first region, and a second region with a transmittance higher than the first region;
the second region corresponds to the center region of the display unit, and the first region corresponds to end portions of the display unit,
wherein the end portions surround the second region, and wherein the encapsulation substrate is between the polarizer film and the display unit, and
wherein the display unit comprises a pixel electrode arranged in each pixel, and a common electrode arranged to extend over entire pixels, and wherein the voltage applying unit applies a constant voltage to the common electrode via a plurality of voltage lines connecting the voltage supplying unit to the common electrode and disposed on at least two sides of the display unit.
2. The organic light emitting display apparatus of claim 1 , wherein the first region is in the display unit and is adjacent to the voltage applying unit, and the second region is in the display unit and is relatively far from the voltage applying unit.
3. The organic light emitting display apparatus of claim 1 , wherein the voltage applying unit is arranged to surround the display unit.
4. The organic light emitting display apparatus of claim 1 , wherein the voltage applying unit is arranged to be adjacent to one side region of the display unit, and wherein the first region corresponds to the one side region of the display unit, and the second region corresponds to another side region of the display unit.
5. The organic light emitting display apparatus of claim 1 , wherein the polarizer film comprises a polyvinyl alcohol film.
6. The organic light emitting display apparatus of claim 5 wherein the polyvinyl alcohol film further comprises absorbed iodine.
7. The organic light emitting display apparatus of claim 6 , wherein light transmittances of the plurality of regions become different from each other according to a difference between amounts of the iodine absorbed by the polyvinyl alcohol film.
8. The organic light emitting display apparatus of claim 7 , wherein the difference between the amounts of the absorbed iodine is due to spraying of the polyvinyl alcohol film with an iodine liquid while a portion of the polyvinyl alcohol film is covered.
9. The organic light emitting display apparatus of claim 7 , wherein the difference between the amounts of the absorbed iodine is due to a difference between time periods during which the polyvinyl alcohol film is soaked in an iodine liquid.
10. The polarizer film of claim 9 , wherein the plurality of regions comprise a first region corresponding to one end region of the main portion, and a second region corresponding to another end region of the main portion.
11. The polarizer film of claim 9 , wherein the difference between the amounts of the absorbed iodine is due to a difference between time periods during which the polyvinyl alcohol film is soaked in an iodine liquid.