ORGANIC LIGHT-EMITTING DISPLAY DEVICE

Abstract

An organic light-emitting display device, comprising: at least one thin-film transistor (TFT) on a substrate (100); an electrode (118) electrically connected to the at least one thin-film transistor (TFT); a dam (120) exposing an emission region of the electrode (118); a dielectric layer (122) on the dam and configured to either reflect or absorb light in an ultraviolet region; an organic light-emitting layer (130) overlapping the emission region and the dielectric layer (122) around the emission region; and a spacer (121) on the dam (120), wherein the dielectric layer (122) is further formed on at least one side surface of the spacer (121), and wherein the dielectric layer (122) is open on a top surface of the spacer (121).

Claims

[1] An organic light-emitting display device comprising: at least one thin-film transistor (TFT) on a substrate (100); an electrode (118) electrically connected to the at least one thin-film transistor (TFT); a dam (120) exposing an emission region of the electrode (118); a dielectric layer (122) on the dam and configured to either reflect or absorb light in an ultraviolet range; an organic light-emitting layer (130) overlapping the emission region and the dielectric layer (122) around the emission region; and a spacer (121) on the dam (120), wherein the dielectric layer (122) is further formed on at least one side surface of the spacer (121) and wherein the dielectric layer (122) is open on an upper surface of the spacer (121). [2] The organic light-emitting display device according to claim 1, further comprising: a planarization layer (117) covering the at least one thin-film transistor (TFT). [3] The organic light emitting display device according to claim 1 or 2, wherein the organic light emitting layer (130) is not formed over the dam (120). [4] The organic light-emitting display device according to claim 1 or 2, wherein the dielectric layer (232) exposes a portion of a side surface of the spacer (231) connected to the upper surface of the spacer (231) and on an upper surface of the spacer (231). [5] The organic light emitting display device according to claim 2, further comprising an auxiliary dielectric layer (128) configured to either reflect or absorb the light in the ultraviolet region on a top surface of the planarization layer (117). [6] The organic light-emitting display device according to any one of claims 1 to 5, further comprising an auxiliary ultraviolet (UV) blocking layer (128) provided in a region not provided with the electrode (118). [7] The organic light emitting display device according to any one of claims 1 to 6, wherein the spacer (121) and the dam (120) are formed of the same material. [8] The organic light emitting display device according to any one of claims 1 to 7, wherein the spacer (121) and the dam (120) are formed of polyamide or polyimide. [9] The organic light emitting display device according to claim 2, wherein the planarization layer (117) is an organic layer comprising a photoactive compound (PAC). [10] The organic light emitting display device according to any one of claims 1 to 9, wherein the ultraviolet region reflected or absorbed in the dielectric layer (122) has a wavelength of about 10 nm to 400 nm. [11] The organic light emitting display device according to any one of claims 1 to 10, wherein the dielectric layer (122) is an inorganic layer. [12] The organic light emitting display device according to claim 1, wherein the dielectric layer (122) comprises at least one selected from the group consisting of ZnO x , TiO x , Si x N y and Ta x O y . [13] The organic light-emitting display device according to any one of claims 1 to 12, wherein the dielectric layer (122, 242, 252) comprises a plurality of first ultraviolet (UV) blocking layers (242a, 252a, 252c, 252e) and at least one second UV blocking layer on the first UV blocking layers (242b, 252b, 252d, 252f). [14] The organic light-emitting display device according to claim 13, wherein the plurality of first UV-blocking layers (242a, 252a, 252c, 252e) are formed of inorganic layers and the at least one second UV-blocking layer (242b, 252f) is formed of an organic layer. [15] An organic light-emitting display device comprising: at least one thin-film transistor (TFT) on a substrate (100); an electrode (118) electrically connected to the at least one thin-film transistor (TFT); a dam (120) exposing an emission region of the electrode (118); a dielectric layer (122) on the dam and adapted to either reflect or absorb light in an ultraviolet range; and an organic light-emitting layer (130) overlapping the emission region and the dielectric layer (122) around the emission region; wherein the dielectric layer (122, 242, 252) comprises one or more pairs of an inorganic layer (242a, 252a, 252c, 252e) and an organic layer (242b, 252b, 252d, 252f) such that they are alternately stacked. [16] The organic light emitting display device according to claim 15, wherein: the inorganic layer (242a, 252a, 252c, 252e) comprises at least one selected from the group consisting of ZnO x , TiO x , Si x N y and Ta x O y ; and the organic layer (242b, 252b, 252d, 252f) comprises one selected from the group consisting of polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polyethylene terephthalate (PET), cyclo-olefin polymer (COP) and polycarbonate (PC). [17] The organic light emitting display device according to claim 15 or 16, wherein the dielectric layer (122) comprises a plurality of sub-layers, wherein an outermost sub-layer of the plurality of sub-layers is flexible.

Images