Organic light emitting display device

Abstract

The invention discloses an organic light emitting display device comprising an organic light emitting diode which is composed of a first conductive electrode, an organic electroluminescence unit and a second conductive electrode from bottom to top. A micro lens array is arranged on the second conductive electrode. A buffer material layer is arranged on the micro lens array. A light absorption layer capable of absorbing ambient incident light is arranged on the buffer material layer. A light hole array including a plurality of light holes is arranged in the light absorption layer, and the light absorption layer corresponds to the micro lens array. The micro lens array includes a plurality of micro lenses. Self-emitted light of the organic light emitting diode can be converged through the micro lenses, and emitted out through the light holes. By adopting the organic light emitting display device of the invention, the ambient contrast ratio can be effectively improved, the luminous efficiency of the OLED device can be maintained to the maximum, and the visibility of an AMOLED device in the sunlight can be improved.

Description

technical field [0001] The present invention relates to an active matrix organic light emitting display (AMOLED, Active Matrix Organic Light Emitting Diode), in particular to an organic light emitting display device capable of improving contrast. Background technique [0002] Traditional organic light-emitting diode devices have top-emitting and bottom-emitting devices. The cathode of the top-emitting device usually uses a semi-reflective and semi-transparent low-work function conductive electrode, and the anode uses a reflective mirror metal or multi-layer conductive electrode structure with a high work function, while the bottom-emitting device The cathode usually uses a low work function conductive electrode with a reflective mirror, and the anode uses a transparent conductive electrode. When outdoor ambient light hits the light-emitting surface of the device, most of the ambient light will be reflected by the cathode or anode, resulting in AMOLED contrast under ambient l...

AI Technical Summary

Problems solved by technology

Although this method can eliminate part of the ambient light, it also relatively eliminates part of the self-illumination of the organic light-emitting diodes, and the change in the contrast of the display device is not obvious, and the visual effect is limited.

figure 1 As another way to eliminate ambient light in the prior art, a circular polarizer 103 is provided above the organic light emitting diode composed of the first conductive electrode 100, the organic electroluminescence unit 101 and the second conductive electrode 102, but this While absorbing part of the ambient light, the self-luminescence of the OLED is greatly lost, about 50% of the loss

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