High Contrast Thin Film Electroluminescent Device
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Electroluminescent display
High contrast
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Recently, the electroluminescent (EL) technology has made a great progress in developing multi-color panels. In this paper, first, both AC and DC ZnS electroluminescent display devices having powder or thin film structures are reviewed, and their properties and characteristics are discussed. Secondly, the present fabrication techniques are outlined, and finally, the state of the arts in the electroluminescent display devices and its future trends also are discussed.
Electroluminescent display
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A new electroluminescent device concept is proposed to achieve low voltage operation. The device is based on a lattice matched semiconductor/insulator/luminescent layer/insulator/semiconductor structure in which, under bias, electrons are injected from the semiconductor into the electroluminescent layer at high energy. This tunnel thin film electroluminescent device is integrable with silicon and suitable for use in very low voltage, high brightness electroluminescent displays. Preliminary results indicate operation as low as 15 V with a peak brightness of 22 fL at 24 V.
Electroluminescent display
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Abstract The sections in this article are Powder Electroluminescent Devices Thin‐Film Electroluminescent Devices Electrical Behavior of Thin‐Film Electroluminescent Devices Optical Behavior of Thin‐Film Electroluminescent Devices Thin‐Film Electroluminescent Color Displays
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AC-driven high field thin film electroluminescent (TFEL) displays based on inorganic light emitting layers have reached a general acceptance in demanding display applications where excellent performance is required. It is believed that this type of displays can be seen as the ultimate flat panel display due to its all solid state structure which is advantegeous among all competing technologies.
Electroluminescent display
Flat panel display
Flat panel
Solid-State Lighting
Flexible display
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Design of thin-film electroluminescent structures is a complex task and requires a significant operator performance. The developed program "IDECSoft" allows to solve this type of problem and synthesize the structure of the thin-film electroluminescent display.
Electroluminescent display
Operator (biology)
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Multicolor organic electroluminescent QVGA display device shave been developed through application of patterned lateral three-color electroluminescent layers which are driven by the single matrix method. The devices have achieved almost practical level in their performance. The organic electroluminescent layers and the metal cathodes have been fabricated using metal shadow masks. Further examination of the panel fabrication process and the organic materials has been made, and the results have been applied to the display devices. The organic electroluminescence device structure of the display panel is a four-layer stack consisting of a hole injection layer, hole transport layer, light emitting layer, and electron transport layer. The display pixel consists of three color elements which are green, orange, and blue. The green and blue emitting materials and the electron transport material have been newly developed. The display panel has been encapsulated by a glass cap and driven by the single matrix method. At the Japan Electronics Show in October 1997, the early stage sample of this display device has been demonstrated at video rate moving pictures. After then several improvement have been achieved on the driving technology and on the panel fabrication technology and the display succeeded to perform at 80 cd/m2 of maximum luminance. In this paper,the fabrication and operating method of the electroluminescent panel are reported.
Electroluminescent display
Flat panel display
Shadow mask
CRTS
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An extremely stretchable electroluminescent device is fabricated by P. S. Lee and co-workers, as described on page 4490. The stretchable alternating-current electroluminescent (ACEL) device possesses extremely high stretchability, and can be linearly stretched to 700% with the luminance being maintained at 70% of the initial value before stretching. The device can be repeatedly stretched to 400% with stable emission behavior. The presented device will provide new opportunities in stretchable lighting, volumetric 3D displays, interactive readout systems, and other unprecedented applications.
Electroluminescent display
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Thin film electroluminescent display is one of the main flat panal display technologies. In this paper, the study on mechanism of electroluminescence is introduced, the research development of this technology on material and device in recent years is reviewed, and the methods to achieve high blue luminescence are discussed in detail.
Electroluminescent display
Research development
Flat panel display
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