CN100444423C - An organic luminous display device - Google Patents

An organic luminous display device Download PDF

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CN100444423C
CN100444423C CN 200310122856 CN200310122856A CN100444423C CN 100444423 C CN100444423 C CN 100444423C CN 200310122856 CN200310122856 CN 200310122856 CN 200310122856 A CN200310122856 A CN 200310122856A CN 100444423 C CN100444423 C CN 100444423C
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organic
luminous
display
device
organic luminous
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CN 200310122856
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CN1635822A (en )
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科 陈
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上海广电电子股份有限公司
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Abstract

本发明涉及一种有机发光显示器件,其特征在于:在阴极和电子传输层之间设有一光电传导层或在阳极和空穴传输层之间设有一光电传导层。 The present invention relates to an organic light emitting display device, comprising: a photo-conductive layer provided between the cathode and the electron transport layer, or provided with a photoelectric conducting layer between the anode and the hole transport layer. 使用时本发明在有机发光器件的阴极和电子传输层之间加入一层光电导电材料,或加在阳极和空穴传输层之间。 When using the present invention is added between the cathode and the electron transport layer of the organic light emitting layer of the photoelectric device of conductive material, or is applied between the anode and the hole transport layer. 加入光电导电层后,使得有机发光器件在某一电压范围内发光强度有两个差别较大的值,也就是双稳态区域,一旦有了双稳态器件就有了记忆功能,也就是说在这个电压范围内可以保存发光强度值;而且这两个稳定状态相互转化,也就是可以改变记忆的内容,这个显示器件还可广泛应用于其他存储电子设备中,它有发光的特性,也可以用于一些特殊的光电系统中。 After addition of the photoelectric conductive layer so that the organic light emitting device emits light intensity difference between two larger values ​​within a certain voltage range, i.e. bistable region, once there have bistable memory function, that is to say within this voltage range may be stored luminous intensity values; and this two stable states into each other, that is, can change the contents of memory, the display device can be widely applied to other electronic storage device, which has emission characteristics, can be for some special photovoltaic system.

Description

一种有机发光显示器件技术领域:本发明涉及电子显示器件的技术领域,具体地说是一种记忆型的有机发光显示器件。 An organic light emitting display device Technical Field: The present invention relates to the field of electronic display devices, in particular to a memory type organic light emitting display device. 背景技术:目前的有机发光器件都是无记忆功能的,所谓无记忆就是当发光器件通电时,电压到达某一域值后开始发光(过程1),发光强度隨着电压的增大而增强,当电压降低时则反之(过程2),用图1说明,图中的直线表示亮度随着电压变化的情况,图线的箭头表示电压升高的方向,两个箭头表示电压由低到高,再由高到低的过程,对于无记忆器件,这个两个过程的图线是基本重合的,图1中就认为两条线是完全重合的,故看上去只有一条线。 BACKGROUND OF THE INVENTION: The organic light emitting device is currently no memory function, a so-called non-light-emitting device when the memory is powered, the voltage reaches a certain threshold to start emitting light (process 1), the emission intensity is enhanced with increasing voltage, when the voltage decreases and vice versa (process 2) described using FIG 1, FIG straight line represents luminance changes with the voltage, the direction of the arrow in FIG line represents the voltage rise, two arrows represents the voltage from low to high, the process then high, no memory for the device, the two processes are substantially coincident FIG line in Figure 1 is considered completely overlap two lines, so only one line appears. 这种特征的器件,我们就称无记忆器件,因为当电压降低时,器件没有表现出任何以前的信息。 This feature of the device, we say no memory devices, because when the lower voltage, the device did not show any previous information. 这种无记忆功能的有机发光器件存在着一些问题,它的驱动方式有比较高的要求,对于用简单的无源矩阵驱动,就是通过行脉冲扫描来实现平面显示,当行数越大脉冲的占空比就越小,由于有机发光器件没有记忆功能,必须在瞬间有很强的发光强度,平均亮度才会较高。 This non-memory organic light emitting device, there are some problems, its drive a relatively high demand for a simple passive matrix driving, a flat display is achieved by scanning line pulse, when the pulse representing the larger number of rows smaller than the air, since the organic light emitting device has no memory function, there must be a strong emission intensity at the moment, the average luminance will be high. 因为有机发光器件是属于电流驱动的,所以瞬间驱动电流比较大,有很大部分电能消耗在驱动线路上,电能转化为热能,使器件温度升高, 对器件寿命很不利,另外亮度过高会大大降低有机发光器件的寿命, 而寿命是制约有机发光器件产业化的关键因素,因此无源矩阵驱动的有机发光显示方式无法实现大屏幕显示,这是一个无记忆器件的不利的特征。 Since the organic light emitting device is part of the current driving, the instantaneous driving current is relatively large, the great majority of power consumption in the driving circuit, electric energy into heat, the device temperature, it is disadvantageous to the life of the device, high brightness will be further greatly reduce the lifespan of the organic light-emitting device, and life is a key factor restricting the industrialization of organic light-emitting device, and therefore the passive matrix organic light-emitting display can not achieve large-screen display, which is a non-memory devices unfavorable characteristics. 如果要制造大尺寸高分辨率的显示屏,无记忆有机发光器件必须采用TFT (薄膜晶体管)有源矩阵驱动技术,但有机发光器件的TFT技术制造工艺比较复杂,而且要采用多晶硅TFT技术,其技术还没成熟,目前TFT面板成本很高,而且TFT技术和有机发光器件制造技术不兼容,增加了工艺流程,还有目前的TFT技术还不能做成柔性的面板,这将限制显示器的应用场合。 To manufacture a high-resolution large-size display, no memory organic light emitting device must TFT (thin film transistor) active matrix driving technique, the TFT manufacturing process of the organic light-emitting device technology is relatively complicated and polysilicon TFT technology to be used, which technology not mature, the current high cost of TFT panel, and organic light emitting device and TFT technology is not compatible with manufacturing technique, an increase of the process, as well as the current technology can not be made flexible TFT panel, which will limit the display of applications . 发明内容:本发明的目的在于提供一种改进的有机发光显示器件,它可克服现有技术中的一些不足。 SUMMARY OF THE INVENTION: The purpose of the present invention to provide an improved organic light emitting display device, which can overcome some of the deficiencies of the prior art. 为了实现上述目的,本发明的技术方案是: 一种有机发光显示器件,它主要包括壳体、设在壳体内的阴极和阳极、以及设在阴极处空穴传输层,其特征在于:在阴极和电子传输层之间设有一光电传导层或在阳极和空穴传输层之间设有一光电传导层。 To achieve the above object, the technical solution of the present invention is: an organic light emitting display device, which includes a housing, the housing provided in the cathode and the anode, and the cathode provided in the hole-transporting layer, wherein: the cathode and the electron transport layer is provided between a photoelectric conductive layer is provided with a photoelectric conducting layer or between the anode and the hole transport layer. 使用时本发明在有机发光器件的阴极和电子传输层之间加入一层光电导电材料,或加在阳极和空穴传输层之间。 When using the present invention is added between the cathode and the electron transport layer of the organic light emitting layer of the photoelectric device of conductive material, or is applied between the anode and the hole transport layer. 加入光电导电层后, 使得有机发光器件在某一电压范围内发光强度有两个差别较大的值, 也就是双稳态区域, 一旦有了双稳态器件就有了记忆功能,也就是说在这个电压范围内可以保存发光强度值.,而且这两个稳定状态相互转化,也就是可以改变记忆的内容,这个显示器件还可广泛应用于其他存储电子设备中,它有发光的特性,也可以用于一些特殊的光电系统中。 After addition of the photoelectric conductive layer so that the organic light emitting device emits light intensity difference between two larger values ​​within a certain voltage range, i.e. bistable region, once there have bistable memory function, that is to say within this voltage range may be stored luminous intensity values, and these two stable states into each other, that is, can change the contents of memory, the display device can be widely applied to other electronic storage device, which has emission characteristics, but also It can be used for particular photovoltaic system. 附图说明:图1为现有技术中有机发光器件的性能示意图图2为本发明的性能示意图图3为本发明一实施例的结构示意图图4为本发明又一实施例的结构示意图具体实施方式:下面结合附图和实施例对本发明作进一步的描述。 BRIEF DESCRIPTION OF DRAWINGS: Figure 1 is a schematic view of the performance properties of the prior art schematic diagram of organic light emitting device 2 of the present invention. FIG. 3 is a schematic structural diagram of an embodiment 4 of the present invention further structural diagram of an embodiment of the invention DETAILED DESCRIPTION Method: the present invention will be further described in conjunction with the accompanying drawings and embodiments. 本发明主要包括壳体l、设在壳体内的阴极2和阳极3、以及设在阴极处的电子传输层4和设在阳极处的空穴传输层5,其特征在于:在阴极和电子传输层之间设有一光电传导层6或在阳极和空穴传输层之间设有一光电传导层6;电子传输层与空穴传输层之间设有一复合发光层7;光电传导层为8 0 — 1 5 Onm厚的茈红。 The present invention mainly comprises a housing L, is provided in the housing 3 and the anode 2 cathode, and the electron transporting layer disposed at the cathode 4 is provided at the anode and a hole transport layer 5, characterized in that: the cathode and the electron transport a photovoltaic layer provided between the conductive layer 6 is provided with a photoelectric conducting layer or between the anode 6 and the hole transporting layer; 7 is provided with a composite layer between the electron transport emission layer and the hole transport layer; a conductive layer as a photoelectric 80-- 1 5 Onm thick perylene red. 加入光电导电层后,当有机发光器件上电压有低升高时,由于没有光照,光电导电材料的电阻很高,当电压低时通过器件的电流很小(过程l),无法驱动器件发光,当电压升高到一定程度(过程2), 电流足以驱动器件发光后,器件发出的光一部分被光电导材料吸收, 这时光电导材料的电阻由于光照而下降,降低的电阻导致电流增大, 电流增大又使器件发光增强,这样发光增强又会促使电流增大,产生正反馈效应,由于这个正反馈效应会使发光强度随电压的升高而激增,当电压开时降低时(过程3),由于正反馈效应,发光强度缓慢下降,当电压下降到一定程度(过程4),发光强度无法维持正反馈时,电流急剧下降,发光强度很快将为零,到此完成了电压由低到高再由高到低的过程。 After addition of the photoelectric conducting layer, the organic light emitting device when a low voltage is increased, the absence of light, high resistance of the photo conductive material, when a low-voltage current through the device is small (process L), the light emitting device can not be driven, when the voltage is increased to a certain extent (procedure 2), after the current is sufficient to drive the light emitting device, a part of light emitted from the device is absorbed by the photoconductive material, then the resistance of a photoconductive material is lowered due to the light, resulting in a reduced current resistance increases, the current the device is increased and enhanced emission, so that enhanced emission current increase will cause, generates a positive feedback effect, since the positive feedback effect causes the emission intensity increases with voltage surge when the voltage is decreased opening (process 3) , due to the positive feedback effect, the emission intensity decreased slowly when the voltage drops to a certain extent (process 4), the light emission intensity can not be maintained when the positive feedback, a sharp decline in the current, the emission intensity will soon be zero, this voltage from low to complete the process was high from high to low. 这四个过程可以用图2表示,箭头表示过程进行的方向,可以看出该图线与无记忆器件的不同,电压由低到高和由高到低的两个过程的图线不再重合,在某一电压范围内发光强度有两个差别较大的值(过程1和3),也就是双稳态区域, 一旦有了双稳态器件就有了记忆功能,也就是说在这个电压范围内可以保存发光强度4值;而过程2, 4可以使这两个稳定状态相互转化,也就是改变记忆的内容。 This process can be represented by four in FIG. 2, the arrow indicates the direction of the process, it can be seen that the plot with no memory device is different from a line voltage from low to high and high to low two processes are no longer coincident , within a certain voltage range of the emission intensity difference between two larger values ​​(process 1 and 3), i.e. bistable region, once there have bistable memory function, that is to say the voltage It can be stored in the range of luminous intensity value 4; and the process 2, 4 may make these two stable states into each other, that is, change the contents of memory. 利用这个记忆特性,就可以实现简单无源矩阵驱动的大屏幂有机发光显示器,由于像素有了记忆功能,扫描脉冲可分成两种,一种是写入脉冲,另一种是保持脉冲,当写入脉冲作用时,列数据线可以任意控制发光器件的发光状态,当保持脉冲作用时,发光器件保持原先的发光状态,所以不象无记忆器件是一行行逐一发光的,在这里所有的扫描行可以同时显示,因而不需要发光器件瞬时高强度发光, 减小了电流强度和发热,大大降低驱动电路上的电能消耗,从而延长了显示器的寿命。 With this memory characteristics, can achieve a simple passive matrix driving power of the large-screen organic light emitting display, since the pixel has memory function, a scan pulse can be divided into two, one is a write pulse, sustain pulse and the other is, when when the write pulse, the data lines can be arbitrarily controlled light emission state of the light emitting device, when the holding pulse, the light emission of the light emitting device to maintain the original state, the memory device is not unlike one by one the light emitting rows, where all scan lines can be displayed simultaneously, and thus does not require a high instantaneous intensity of the emission light-emitting device, the current intensity and reduced heat generation, power consumption is greatly reduced on the drive circuit, thereby extending the life of the display. 由于采用简单的无源矩阵驱动,可降低大尺寸有机发光显示屏的成本;另外由于它是一种新的记忆器件,可以广泛应用于其他存储电子设备中,它又有发光的特性,也可以用于一些特殊的光电系统中。 As a result of the simple passive matrix driving, it can reduce the cost of a large-sized organic light emitting display panel; Also because it is a new memory device can be widely applied to other electronic storage devices, which have emission characteristics, can be for some special photovoltaic system. 下面给出一个具体实施方式,器件结构为IT0/NPB/A1Q3: QA/AlQ3/Me-PTC/Mg:Ag,结构如图3所示。 The following gives a specific embodiment, the device structure IT0 / NPB / A1Q3: QA / AlQ3 / Me-PTC / Mg: Ag, the structure as shown in FIG. 先在IT0(透明电极)上,蒸镀一层50nmNPB(双萘基二苯基二苯胺)作为空穴传输层;再在NPB上蒸镀一层60nm的A1Q3(八羟基喹啉铝),其中掺杂AQ(二羟基喹啉并吖喷),这一层作为发光层;再蒸30nm的AlQ3,作为电子传输层;再在电子传输层蒸一层100nm的Me-PTC(菲红),作为光电传导层;最后蒸200nm的Mg:Ag(镁银)合金,作为阴极。 IT0 in the first (transparent electrode), a layer of deposited 50nmNPB (naphthyl diphenyl bis aniline) as the hole transport layer; and then deposited on the NPB layer of 60nm A1Q3 (eight-hydroxyquinoline aluminum), wherein doped AQ (acridine-dihydroquinoline and spray), this layer as a light emitting layer; and further distilling the A1Q3 30nm, as the electron transporting layer; electron-transporting layer was distilled again in the 100nm layer of Me-PTC (phenanthrene red), as photoelectric conducting layer; 200nm finally distilling the Mg: Ag (magnesium silver) alloy, as a cathode. 在另一实施方式中,器件结构为ITO/Me-PTC/NPB/A1Q3:QA /AlQ3/Mg:Ag,结构如图4所示。 In another embodiment, the device structure is ITO / Me-PTC / NPB / A1Q3: QA / AlQ3 / Mg: Ag, the structure shown in FIG. 先在ITO(透明电极)上,蒸镀一层lOOnm的Me-PTC(茈红),作为光电传导层;再在光电传导层上蒸镀一层50nmNPB(双萘基二苯基二苯胺)作为空穴传输层;再在NPB上蒸一层60nm的A1Q3(八羟基喹啉铝),其中掺杂AQ(二羟基喹啉并吖啶), 这一层作为发光层;然后再蒸发30皿的A1Q3,作为电子传输层; 最后蒸200nm的Mg:Ag(镁银)合金,作为阴极。 In the first ITO (transparent electrode), the deposition of a layer of lOOnm Me-PTC (perylene red), as the photoelectric conducting layer; re-deposited layer 50nmNPB (naphthyl diphenyl bis aniline) on the conductive layer as a photoelectric a hole transport layer; 60nm layer was distilled again in the NPB A1Q3 (eight-hydroxyquinoline aluminum), wherein the doping AQ (dihydroxy acridine and quinoline), which one light-emitting layer; then evaporation dish 30 A1Q3, as the electron transporting layer; 200nm finally distilling the Mg: Ag (magnesium silver) alloy, as a cathode.

Claims (2)

  1. 1、一种有机发光显示器件,它主要包括壳体、设在壳体内的阴极和阳极、以及设在阴极下边的电子传输层和设在阳极上边的空穴传输层,其特征在于:在阴极和电子传输层之间设有一光电传导层或在阳极和空穴传输层之间设有一光电传导层,光电传导层的材料为苝红,厚度为80-150nm。 1, an organic light emitting display device, which includes a housing, the housing provided in the cathode and the anode, and the cathode provided in the lower electron transport layer and the anode provided on top of the hole transport layer, wherein: the cathode and the electron transport layer is provided between a photoelectric conductive layer is provided with a photoelectric conducting layer or between the anode and the hole transport layer, the conductive layer of photovoltaic material is perylene red, the thickness of 80-150nm.
  2. 2、 根据权利要求1所述的一种有机发光显示器件,其特征在于: 电子传输层与空穴传输层之间设有一复合发光层。 2, according to claim one organic light emitting display device of claim 1, wherein: a composite light-emitting layer provided between the electron transport layer and the hole transport layer.
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