Organic electroluminescent display device

An electroluminescent display and display device technology, applied in the direction of electroluminescent light source, electric light source, identification device, etc., can solve the problems of large OFF current, low ON/OFF ratio, insufficient current for sufficient mobility supply, etc.

Active Publication Date: 2010-02-03
UDC IRELAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] When a TFT using a-IGZO is used, for example, as a driving circuit for a display device, the problem is that the 1-10cm 2 The mobility of / Vs is not enough to supply enough current, the OFF current is large, and the ON / OFF ratio is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] The processing conditions of each step are as follows:

[0106] Photoresist coating conditions: Photoresist OFPR-800 (manufactured by Tokyo Ohka Kogyo Co., Ltd.) was coated by spin coating at 4000 rpm for 50 sec.

[0107] 2) Formation of gate insulating film

[0108] Sputtering conditions: use RF magnetron sputtering device at 400W RF power supply and sputtering gas flow Ar / O 2 Sputtering was performed at =12.0 / 2.0 sccm.

[0109] 3) Form active layer and resistance layer

[0110] The sputtering conditions of the IGZO film with higher conductivity and the IGZO film with lower conductivity are as follows:

[0111] Sputtering conditions for IGZO films with higher conductivity: InGaZnO as target composition 4 On the polycrystalline sintered body, use the RF magnetron sputtering device at a DC power supply of 200W and a sputtering gas flow rate of Ar / O 2 Sputtering was performed at =12.0 / 0.6 sccm.

[0112] The patterning process by the photoresist method is the same as...

Embodiment 2

Embodiment 3

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Abstract

An organic electroluminescent display device includes at least a driving TFT and pixels which are formed by organic electroluminescent elements and are provided on a substrate of the TFT. The drivingTFT includes at least a substrate, a gate electrode, a gate insulating film, an active layer, a source electrode, and a drain electrode. The driving TFT further includes a resistive layer between theactive layer and at least one of the source electrode and the drain electrode. The pixels include at least one color-modified pixel which has a color filter that modifies the emission color of the color-modified pixel, and which emits light of the modified color.

Description

technical field [0001] The present invention relates to an organic electroluminescence display device having an organic electroluminescence element and a TFT (Thin Film Transistor), and more particularly, to an organic electroluminescence display device having an improved TFT using an amorphous oxide semiconductor and a color filter-based display device. An organic electroluminescent display device that emits organic electroluminescent elements. In the present invention, unless otherwise specified, TFT refers to a field effect TFT. Background technique [0002] In recent years, with advances in liquid crystal and electroluminescence (EL) technologies, flat and thin image display devices (flat panel displays: FPDs) have been put into practical use. In particular, organic electroluminescent elements (hereinafter referred to as "organic EL elements" in some cases) using thin-layer materials that emit light by current excitation can emit light with high Reductions in thickness...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L29/786G09F9/30H01L27/32H05B33/12H05B44/00
CPCH01L27/3262H01L27/322H01L2251/5338H01L29/7869H05B33/12H10K59/38H10K59/1213H10K2102/311H10K59/126
Inventor 松永淳中山昌哉田中淳
Owner UDC IRELAND
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