Organic light emitting display device

Abstract

An organic light emitting display device includes a substrate including a sub-pixel region and a transparent region, a first semiconductor element in the sub-pixel region on the substrate, a second semiconductor element overlapping at least a portion of the sub-pixel region on the substrate, and is spaced apart from the first semiconductor element, a first lower electrode disposed in the sub-pixel region on the first semiconductor element and electrically connected to the first semiconductor element, a second lower electrode disposed in the transparent region on the substrate and electrically connected to the second semiconductor element, a first light emitting layer on the first lower electrode, a second light emitting layer on the second lower electrode, and an upper electrode on the first and second light emitting layers where second lower electrode has a thickness that is less than a thickness of the first lower electrode, and transmits a light.

What is claimed is: 
     
         1 . An organic light emitting display device, comprising:
 a substrate including a sub-pixel region and a transparent region;   a first semiconductor element in the sub-pixel region on the substrate;   a second semiconductor element overlapping at least a portion of the sub-pixel region on the substrate, the second semiconductor element being spaced apart from the first semiconductor element;   a first lower electrode in the sub-pixel region on the first semiconductor element, the first lower electrode being electrically connected to the first semiconductor element;   a second lower electrode in the transparent region on the substrate, the second lower electrode being electrically connected to the second semiconductor element, the second lower electrode having a thickness which is less than a thickness of the first lower electrode, the second lower electrode which transmits a light;   a first light emitting layer on the first lower electrode;   a second light emitting layer on the second lower electrode; and   an upper electrode on the first and second light emitting layers.   
     
     
         2 . The organic light emitting display device of  claim 1 , wherein the first semiconductor element includes:
 a first active layer in the sub-pixel region on the substrate;   a first gate electrode on the first active layer;   a first source electrode which contacts a first portion of the first active layer, the first source electrode being on the first gate electrode; and   a first drain electrode which contacts a second portion of the first active layer, the first drain electrode being on the first gate electrode.   
     
     
         3 . The organic light emitting display device of  claim 2 , wherein the second semiconductor element includes:
 a second active layer on the substrate;   a second gate electrode on the second active layer;   a second source electrode which contacts a first portion of the second active layer, the second source electrode being on the second gate electrode; and   a second drain electrode which contacts a second portion of the second active layer, the second drain electrode being on the second gate electrode,   wherein a portion of the second semiconductor element overlaps the transparent region.   
     
     
         4 . The organic light emitting display device of  claim 3 , wherein the second light emitting layer includes an organic emission layer, and at least a portion of the second semiconductor element overlaps the organic emission layer of the second light emitting layer. 
     
     
         5 . The organic light emitting display device of  claim 3 , wherein the second light emitting layer includes an organic emission layer, and the second semiconductor element does not overlap the organic emission layer of the second light emitting layer. 
     
     
         6 . The organic light emitting display device of  claim 3 , wherein the second portion of the second active layer overlaps the transparent region, and the second drain electrode is disposed in the transparent region. 
     
     
         7 . The organic light emitting display device of  claim 3 , further comprising:
 a planarization layer on the first and second semiconductor elements; and   a pixel defining layer on the planarization layer, the pixel defining layer covering both lateral portions of the first lower electrode and both lateral portions of the second lower electrode.   
     
     
         8 . The organic light emitting display device of  claim 7 , wherein a first contact hole and a second contact hole are defined in the planarization layer, and
 wherein the first lower electrode contacts the first drain electrode via the first contact hole, and the second lower electrode contacts the second drain electrode via the second contact hole.   
     
     
         9 . The organic light emitting display device of  claim 8 , wherein the second light emitting layer includes an organic emission layer, and the second contact hole is located under the organic emission layer of the second light emitting layer. 
     
     
         10 . The organic light emitting display device of  claim 8 , wherein the second light emitting layer includes an organic emission layer, and the second contact hole is located under the pixel defining layer such that the second contact hole does not overlap the organic emission layer of the second light emitting layer. 
     
     
         11 . The organic light emitting display device of  claim 1 , wherein the first light emitting layer emits a light in a first direction which is perpendicular to an upper surface of the substrate, and the second light emitting layer emits a light in a second direction which is opposite to the first direction. 
     
     
         12 . The organic light emitting display device of  claim 1 , wherein the first lower electrode reflects a light which is emitted from the first light emitting layer, and the second lower electrode transmits a light which is emitted from the second light emitting layer. 
     
     
         13 . The organic light emitting display device of  claim 3 , wherein the second light emitting layer emits a light of a white color. 
     
     
         14 . The organic light emitting display device of  claim 13 , wherein when the second semiconductor element is activated, the second light emitting layer emits the light of the white color, and
 wherein when the second semiconductor element is not activated, an image of an object which is located in a back of the organic light emitting display device is transmitted via the transparent region.   
     
     
         15 . An organic light emitting display device, comprising:
 a substrate including a sub-pixel region and a transparent region;   a first semiconductor element in the sub-pixel region on the substrate;   a second semiconductor element spaced apart from the first semiconductor element, the second semiconductor element being in the sub-pixel region on the substrate;   a first lower electrode in the sub-pixel region on the first semiconductor element, the first lower electrode being electrically connected to the first semiconductor element;   a second lower electrode in a portion of the sub-pixel region and the transparent region on the substrate, the second lower electrode being electrically connected to the second semiconductor element, the second lower electrode having a thickness which is less than a thickness of the first lower electrode, the second lower electrode which transmits a light;   a first light emitting layer on the first lower electrode;   a second light emitting layer on the second lower electrode; and   an upper electrode on the first and second light emitting layers.   
     
     
         16 . The OLED device of  claim 15 , wherein the first semiconductor element includes:
 a first active layer in the sub-pixel region on the substrate;   a first gate electrode on the first active layer;   a first source electrode which contacts a first portion of the first active layer, the first source electrode being on the first gate electrode; and   a first drain electrode which contacts a second portion of the first active layer, the first drain electrode being on the first gate electrode.   
     
     
         17 . The OLED device of  claim 16 , wherein the second semiconductor element includes:
 a second active layer on the substrate;   a second gate electrode on the second active layer;   a second source electrode which contacts a first portion of the second active layer, the second source electrode being on the second gate electrode; and   a second drain electrode which contacts a second portion of the second active layer, the second drain electrode being on the second gate electrode.   
     
     
         18 . The OLED device of  claim 17 , further comprising:
 a planarization layer on the first and second semiconductor elements; and   a pixel defining layer on the planarization layer, the pixel defining layer covering both lateral portions of the first lower electrode and both lateral portions of the second lower electrode,   wherein a first contact hole and a second contact hole are defined in the planarization layer, and   wherein the first lower electrode which contacts the first drain electrode via the first contact hole, and the second lower electrode which contacts the second drain electrode via the second contact hole.   
     
     
         19 . The OLED device of  claim 18 , wherein the first and second contact holes are located in the sub-pixel region. 
     
     
         20 . The OLED device of  claim 18 , wherein the second light emitting layer includes an organic emission layer, and the second contact hole is located under the pixel defining layer such that the second contact hole does not overlap the organic emission layer of the second light emitting layer.