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Discolouring field luminous screen of single organic mateiral

A technology of electroluminescence and organic materials, which is applied in the field of color-changing flat-panel display screens, can solve the problems of not meeting the requirements of dynamic display speed, slow decay of luminous light intensity, and inability to change the color of luminous light, etc., to achieve dynamic display and low cost , driving the effect of convenience

Inactive Publication Date: 2007-09-12
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The characteristics of the existing stable color-changing luminous screen are: (1) The luminous color of each material is fixed, changing the driving voltage can only change their relative intensity, and cannot change their respective luminous colors
(2) At least two or more luminescent materials are required; (3) After the excitation stops, the luminous light intensity decays slowly, which cannot meet the speed requirements of dynamic display
But screens that are usable in steady-state situations may not be usable in dynamic situations

Method used

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  • Discolouring field luminous screen of single organic mateiral
  • Discolouring field luminous screen of single organic mateiral

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Embodiment Construction

[0026] The present invention will be further described according to accompanying drawing 1 for embodiment:

[0027] The structure of the color-changing electroluminescent screen of a single organic material is as follows:

[0028] Aluminum Al electrode 1, electron acceleration layer 2, gold Au electrode 3 that can pass through electrons, organic electroluminescent layer 4, insulating layer 5 that restricts electron escape and allows hole injection, ITO electrode 6 and glass substrate 7.

[0029] Aluminum Al electrode thickness: more than 50nm.

[0030] The electron acceleration layer 2 uses silicon dioxide SiO 2 , its thickness is 50nm~500nm.

[0031] The film thickness of the electron-permeable gold Au electrode 3 is less than 1 nm. The electron-permeable electrode can also use silver Ag electrode with lower resistivity.

[0032] The organic electroluminescence layer 4 adopts poly[2-methoxy-5-(2-ethylhexyloxy)]p-phenylene vinylene MEH-PPV, and its thickness is 20nm-50nm. ...

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Abstract

The invention relates to an allochromatic field illuminant screen with single organic material, which is suitable for static and dynamic color displaying. The structure is: aluminum electrode Al, electron accelerating layer, gold Au electrode through which the electron can penetrate, organic field illuminant layer, insulating layer restraining the electron overflow and permitting the cavity pouring, ITO electrode and glass substrate. The driving conditions: the power V1 controls the acceleration of electron; the V2 controls the allochromatic of organic field illuminant. The two powers V1 and V2 are connected to the gold electrode connected to ground. V1 can be alternate current or direct current, when the V1 is direct current, the aluminum electrode is used as negative, the amplitude of the V1 is between 20V to 150V. When the V2 is direct current, when it is low voltage, ITO electrode is connected to the positive, when the V2 is high voltage, ITO electrode is connected to negative, and the amplitude of the V2 is between 0V to 100V. The invention only uses a single material but acquires brightness of different color, the lifespan of the material is shorter than 10 to the power -3 seconds.

Description

technical field [0001] The invention relates to a color-changing flat display screen, which is made of only one organic electroluminescent material and is suitable for stable and dynamic color display. Background technique [0002] Colorization is one of the main technical requirements in modern displays. There are two levels of display technology, steady state and dynamic, and colorization is also divided into steady state and dynamic. The technical solutions they implement are the same, but the dynamic display has higher requirements on materials, and it requires that the light-emitting period or lifespan be shorter than the time to replace a frame of image. The change speed of the luminous color of screen just can be faster than the replacement speed of each frame image like this. However, relying on the persistence of vision effect of the human eye on transient luminescence, it gives people a continuous change in vision, neither discrete images nor tailing. [0003] I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H05B33/14H05B33/00
Inventor 徐征
Owner BEIJING JIAOTONG UNIV