Display device
A technology of display device and light-emitting layer, which is applied in the direction of electrical components, electrical solid-state devices, circuits, etc.
Active Publication Date: 2015-05-06
BEIJING VISIONOX TECH
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Problems solved by technology
[0005] For this reason, what the present invention aims to solve is the problem that the existing multi-color stacked OLEDs must be driven by direct current, and further improve a display device that can be driven by alternating current. By designing an auxiliary PN junction in the device, it can be controlled by a single alternating current power Under the condition of no intermediate electrode lead wire, by adjusting the time distribution ratio of the positive and negative currents of the alternating current, a complete color toning effect can be achieved
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[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe in detail the embodiments of the present invention in conjunction with the accompanying drawings.
[0028] This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of the invention to those skilled in the art, and the present invention will only be defined by the appended claims. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. It will be understood that when an element such as a layer, region or substrate is referred to as being "formed on" or "disposed on" another element, it can be directly on the other element or present middle element. In contrast, when an element is referred to as bei...
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The invention relates to a display device. the display device comprises a first electrode layer, at least one middle transparent conductive layer and a second electrode layer which are stacked on a substrate and a plurality of light emitting layers arranged between the electrode layers and / or the at least one middle transparent conductive layer. The light emitting layers comprise at least one first light emitting layer and a second light emitting layer. The flow directions of currents capable of passing through the at least one first light emitting layer and currents capable of passing through the second light emitting layer are opposite. Unidirectional current control valves capable of passing through the light emitting layers are arranged between the electrode layers, and the flow directions of currents capable of passing through the unidirectional current control valves and currents capable of passing through the light emitting layers on the same layer are opposite. According to the display device, auxiliary PN junctions are designed in the device, and the distribution ratio of negative and positive voltages of alternating currents to current time is adjusted, accordingly, the effect can be displayed completely.
Description
technical field [0001] The invention relates to the field of organic electroluminescence, in particular to a display device driven by alternating current. Background technique [0002] After nearly 30 years of development, organic electroluminescent devices (English full name Organic Light Emitting Device, referred to as OLED) as the next generation of lighting and display technology, has a wide color gamut, fast response, wide viewing angle, no pollution, high contrast , Planarization and other advantages have been applied to a certain extent in lighting and display. A typical organic electroluminescent device generally includes a transparent glass substrate, a first electrode, a second electrode, and an organic functional layer disposed between the two electrodes. [0003] CN101371619 B provides a stacked organic light-emitting device, which includes: a first conductive layer, at least one intermediate conductive layer and a second conductive layer, and a light-emitting u...
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IPC IPC(8): H01L27/32
Inventor 高松刘嵩
Owner BEIJING VISIONOX TECH