White organic light emitting diode

Abstract

The invention relates to a white organic light emitting diode which comprises a transparent electrode, a blue-ray complementary color light emitting layer, a semitransparent electrode, a blue-ray light emitting layer and a non-transparent electrode, wherein the blue-ray complementary color light emitting layer is formed on the transparent electrode; the semitransparent electrode is formed on the blue-ray complementary color light emitting layer; a first potential difference is reserved between the transparent electrode and the semitransparent electrode; the blue-ray light emitting layer is formed on the semitransparent electrode; the non-transparent electrode is formed on the blue-ray light emitting layer; and a second potential difference is reserved between the semitransparent electrode and the non-transparent electrode. The invention can enable light extraction of a blue-ray organic light emitting diode and a blue-ray complementary light organic light emitting diode to reach optimization effect, further achieve the white organic light emitting diode with adjustable color temperature, thereby overcoming the color temperature drift problem of the prior white organic light emitting diode and increasing application range of the white organic light emitting diode.

Description

technical field [0001] The invention relates to a white organic light emitting diode, especially to a white organic light emitting diode with adjustable color temperature (color tunable) of a blue light emitting layer and a blue complementary color light emitting layer that can be independently driven. Background technique [0002] Organic Light-Emitting Diode (OLED) has the advantages of high luminous efficiency, no mercury (Hg) and surface light source, so it has been widely used in the backlight source of liquid crystal display and OLED display. In the white organic light-emitting diode (White Organic Light-Emitting Diode, WOLED), the depletion speed of the blue light-emitting material will be faster than that of the green light-emitting material and the red light-emitting material, so as the use time increases, the white organic light-emitting diode The color temperature of the LED will shift toward the yellowish direction due to the weakening of the blue light, thus lim...

AI Technical Summary

Problems solved by technology

[0003] One of the objectives of the present invention is to provide a white organic light-emitting diode with adjustable color temperature that can independently drive the blue light-emitting layer and the blue-light complementary color light-emitting layer, so as to solve the problem of color temperature drift of the existing white organic light-emitting diodes

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