KR100697373B1 - Double-sided electro-luminescent display and method for fabricating the same - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-sided light emitting display device and a method for manufacturing the same, in which a display in a transmission mode and a reflection mode can be implemented by a single display device.

According to the present invention, the organic EL portion of the first mode for the display of the transmission mode formed on the glass substrate, the second portion for the display of the reflection mode formed adjacent to the organic EL portion of the first mode on the glass substrate The organic EL portion of the mode, a plastic / glass member bonded to the opposing surface of the glass substrate, a plurality of spacers formed between the glass substrate and the plastic / glass member, the glass substrate and the plastic / glass member on the And a polarizing plate formed to exclude the range corresponding to the organic EL part of the first mode, and a polarizing plate attached to the glass substrate and the plastic / glass member, wherein the organic EL part of the first mode and the second mode is formed. Each is driven independently or integrally to implement a display in reflection mode and / or transmission mode.

Description

DOUBLE-SIDED ELECTRO-LUMINESCENT DISPLAY AND METHOD FOR FABRICATING THE SAME}

1 is a view for explaining the structure of an organic electroluminescent device according to a conventional example,

2 is a view for explaining the structure of a double-sided light emitting display device according to an embodiment of the present invention;

3A to 3K illustrate a method of manufacturing a double-sided light emitting display device according to the present invention.

* Explanation of symbols for main parts of drawings *

30: glass substrate, 40: organic EL portion of the first mode,

42: resin B / M layer, 50a, 50b: organic EL portion in second mode,

52: resin B / M layer, 60: plastic / glass member,

62: spacer, 64: polarizing plate,

66: aluminum reflector.

The present invention relates to a double-sided light emitting display device and a method of manufacturing the same. More specifically, a double-sided light emitting display as an organic electroluminescent device in which a screen is implemented in a transmissive mode on one side and a reflective mode on the other side. An apparatus and a method of manufacturing the same.

Currently, organic electroluminescent devices (i.e., organic electroluminescent displays) can drive DC low voltages, provide wide viewing angles, high contrast ratios, ease of moving images based on several response times, and relatively simple processes. It is possible to realize the ultra-thin display having the characteristics of manufacturing and low environmental pollution, and such organic ELD is a trend that is widely used in mobile phones or PDA (Personal Data Assistant).

1 is a view for explaining the structure of an organic ELD according to a conventional example.

Referring to the drawings, an anode ITO electrode layer 12 acting as an anode is formed on the glass substrate 10, and an insulating layer and a cathode sidewall are formed on the anode ITO electrode layer 12. Then, a hole injection layer 14 for hole injection, an organic light emitting layer 16 for emitting light by combining holes and electrons, and a multilayer organic material layer of an electron injection layer 18 for electron injection On the electron injection layer 18, a cathode metal electrode layer 20, which is formed of Al and functions as a cathode, is formed.

Therefore, in the organic ELD shown in FIG. 1, holes are discharged from the hole injection layer 14 in the state where a constant voltage is applied between the anode ITO electrode layer 12 and the cathode metal electrode layer 14. When electrons are injected into the organic light emitting layer 16 from the electron injection layer 18, light is emitted by the combination of electrons and holes in the organic light emitting layer 16, and R / G / Color image is expressed through B color filter.

However, in the structure of the organic ELD shown in FIG. 1, not only black is difficult to be formed by reflection of external light incident from the outside, but also the image is formed by bilateral light emission because a structure capable of realizing the image is adopted only on one side. It is impossible to implement this.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an organic EL layer (Organic Electron-Luminescent Layer) is formed separately on the outside and inside of the pixel to enable a double-sided display by double-sided light emission, It is an object of the present invention to provide a double-side light emitting display device and a method of manufacturing the same, which enable an effective implementation of a black state by aluminum (Al) reflection of an EL layer.

In order to achieve the above object, according to a preferred embodiment of the present invention and the organic EL portion of the first mode formed on the glass substrate; An organic EL portion of a second mode formed adjacent to the organic EL portion of the first mode on the glass substrate; A plastic / glass member bonded to the opposing surface of the glass substrate; A plurality of spacers formed between the glass substrate and the plastic / glass member; A double-sided light emitting display device including a polarizing plate formed on the glass substrate and the plastic / glass member except for a range corresponding to the organic EL portion of the first mode is provided.

Preferably, the organic EL portion of the first mode has a resin B / M layer having a constant height in planar shape on the glass substrate, and an Al layer, an organic layer, and an ITO layer as an organic EL layer on the resin B / M layer are sequentially It is laminated.

Similarly, the organic EL portion of the second mode is formed by laminating a resin B / M layer formed obliquely on the glass substrate, and an Al layer as an organic EL layer, an organic layer and an ITO layer are sequentially formed on the resin B / M layer. Preferably, the organic EL portion of the second mode is formed on at least two of four surfaces of the dot pixel.

According to the present invention, the organic EL portion of the first mode is a transmissive display, and the organic EL portion of the second mode is formed of a reflective display through the reflective plate.

Preferably, the transmissive display by the organic EL unit of the first mode and the reflective display by the organic EL unit of the second mode are driven independently or integrated driving is performed.

According to another embodiment of the present invention, forming a resin matrix B / M (Black Matrix) for forming the organic EL portion of the first and second modes on the glass substrate; Forming organic EL portions in first and second modes on the corresponding resin B / M layers; Bonding a plastic / glass member to the opposite side of the glass substrate; A method of manufacturing a double-side light emitting display device is provided, which comprises bonding a glass plate and a reflective plate for blocking external light to the plastic / glass member.

Preferably, the resin B / M layer is formed by forming a non-conductive resin layer on the entire surface of the glass substrate and patterning the resin layer using a mask corresponding to the shape of the resin B / M layer. .

Further, the resin B / M layer includes a central flat resin B / M layer and a plurality of inclined resin B / M layers formed adjacent to the flat resin B / M layer.

In addition, the organic EL portion of the first and second modes is coated with an Al layer on the corresponding resin B / M layer, and then patterned using a mask, and then the organic layer and the ITO layer are sequentially applied on the Al layer and a mask is used. By patterning.

The glass substrate and the plastic / glass member are made through a spacer.

According to the present invention, the organic EL portion of the first mode is a transmissive display, and the organic EL portion of the second mode is formed of a reflective display through the reflective plate.

Furthermore, the transmissive display by the organic EL portion of the first mode and the reflective display by the organic EL portion of the second mode are driven independently or integratedly.

According to the double-sided light emitting display device and the manufacturing method thereof according to the present invention, a transmissive display is constituted by the organic EL portion of the first mode between the glass substrate and the plastic / glass member, while the organic EL portion of the second mode is formed. The reflective display is configured so that single-sided or double-sided displays can be implemented with independent or integrated driving.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.

FIG. 2 is a view for explaining the structure of a double-sided light emitting display device according to the present invention. The first mode has a planar structure at a central position (ie, inside of a pixel) on a glass substrate 30 indicated by reference numeral 30. The organic EL portion 40 (i.e., transmission mode) is formed.

Here, the organic EL portion 40 of the first mode is a non-conductive resin B / M (Black matrix) layer 42 having a predetermined height in a plane shape on the glass substrate 30, and the resin B / M On the layer 42, an Al layer 44 as an organic EL layer, an organic layer 46, and an indium tin oxide (ITO) layer 48 are sequentially stacked.

In addition, the organic EL portion of the second mode (that is, the reflection mode) formed on the glass substrate 30 in the periphery thereof, that is, the outer side of the organic EL portion 40 of the first mode in the corresponding pixel (ie, the reflection mode) ( 50a, 50b) are formed.

The organic EL portions 50a and 50b of the second mode are formed of an Al layer 54 as an organic EL layer, an organic layer 56 and an ITO layer on a non-conductive resin B / M layer 52 formed to be inclined at a predetermined angle. 58) has a sequentially stacked structure.

In addition, an absorbing layer 50c is preferably provided to prevent adverse effects on the organic EL layer laminated on the inclined resin B / M layer 52.

According to the present invention, it is preferable that the organic EL portions 50a and 50b in the second mode are formed on at least two of four surfaces of the dot pixel.

In addition, a lightweight plastic / glass member 60 is bonded to the pattern, and between the glass substrate 30 and the plastic / glass member 60, the organic EL parts of the first and second modes ( A plurality of spacers 62 are formed for protecting the device characteristics of 40; 50a and 50b and for external shock mitigation.

In addition, the polarizing plate 64 having an anti-glare layer capable of blocking external light for preventing high quality image by preventing reflection of the Al layer by external light is attached to both surfaces.

In addition, an aluminum reflecting plate 66 is provided on the bottom of the plastic / glass member 60 except for a range corresponding to the organic EL portion 40 of the first mode.

Accordingly, the double-sided light emitting display device shown in FIG. 2 realizes a transmission mode by the organic EL unit 40 in the first mode in a flat mode on one side thereof, and is inclined with the support of the aluminum reflector 66 on the other side thereof. The reflection mode by the organic EL portions 50a and 50b in the second mode is realized, and the independent driving and the integrated driving of the organic EL portions 40 and 50a and 50b in the first and second modes are assumed. The practicality of the double-sided display is achieved.

 Next, a method of manufacturing the double-sided light emitting display device according to the present invention shown in FIG. 2 will be described with reference to FIGS. 3A to 3K.

First, the resin layer 70 for forming the resin B / M layers 42 and 52 on the entire surface of the glass substrate 30 is formed (FIG. 3A), and then the resin B / M layers 42 and 52 are formed. The resin layer 70 is patterned (FIG. 3B) using a mask 72 corresponding to the above to form the resin B / M layers 42 and 52 (FIG. 3C).

Thereafter, the entire surface including the resin B / M layers 42 and 52 is coated with an aluminum film 74 (FIG. 3D), and in that state is inclined with the resin B / M layer 42 in the planar shape. The aluminum layer 74 is formed on the resin B / M layers 42 and 52 by patterning the aluminum film 74 using a mask 76 having a shape of the resin B / M layer 52 formed. (FIGS. 3E and 3F).

Similarly, the dielectric film 78 and the ITO film 80 are laminated (FIG. 3g) on the entire surface including the aluminum layer 54, and the dielectric film 78 and the ITO film 80 are formed. The dielectric layers 56 and 46 and the ITO layers 58 and 48 are formed using the mask 82 shown in FIG. 3H (FIG. 3I).

 After that, the aluminum reflector plate 66 is provided on the bottom surface of the plastic / glass member 60 except for the range corresponding to the organic EL portion 40 of the first mode, and a plurality of spacers 62 are formed ( 3J), the plastic / glass member 60 is coupled with the glass 30 through the spacer 62, and the coupling causes the spacer 62 to connect the organic EL portion 50a of the second mode. , 50b).

Then, the polarizing plate 64 is attached to the glass 30 and the plastic / glass member 60 to prevent reflection of external light from the Al layer.

As described above, according to the double-sided light emitting display device and the manufacturing method thereof, the double-sided display can be realized by forming the organic EL structure inside and outside the pixels.

Claims (15)

An organic EL portion of the first mode formed on the glass substrate; An organic EL portion of a second mode formed adjacent to the organic EL portion of the first mode on the glass substrate; A plastic / glass member bonded to the opposing surface of the glass substrate; A plurality of spacers formed between the glass substrate and the plastic / glass member; And a polarizing plate formed on the glass substrate and the plastic / glass member except for a range corresponding to the organic EL portion of the first mode. The organic EL portion according to claim 1, wherein the organic EL portion in the first mode has a plane B / M layer having a predetermined height on the glass substrate, and an Al layer, an organic layer, and an ITO layer as an organic EL layer on the resin B / M layer. A double-sided light emitting display device, characterized in that formed sequentially stacked. The organic EL portion of the second mode is a resin B / M layer formed obliquely on the glass substrate, and an Al layer as an organic EL layer, an organic layer, and an ITO layer are sequentially stacked on the glass B / M layer. A double-sided light emitting display device, characterized in that formed.       The display device of claim 1, wherein the organic EL unit of the second mode is formed on at least two of four surfaces of a dot pixel. The display device according to claim 1, wherein the organic EL portion of the first mode is a transmissive display, and the organic EL portion of the second mode is a reflective display through the reflective plate. The display device according to claim 5, wherein the transmissive display by the organic EL unit in the first mode and the reflective display by the organic EL unit in the second mode are driven independently of each other. The display device according to claim 5, wherein the transmissive display by the organic EL unit in the first mode and the reflective display by the organic EL unit in the second mode are integrally driven. Forming a resin B / M (Black Matrix) layer on the glass substrate for forming the organic EL portions in the first and second modes; Forming organic EL portions in first and second modes on the corresponding resin B / M layers; Bonding a plastic / glass member to the opposite side of the glass substrate; Adhering a polarizing plate for blocking external light to the glass substrate and the plastic / glass member. The method of claim 8, wherein the resin B / M layer is formed by forming a non-conductive resin layer on the entire surface of the glass substrate and patterning the resin layer using a mask corresponding to the shape of the resin B / M layer. Method for manufacturing a double-sided light emitting display device, characterized in that formed. The resin B / M layer of claim 9, wherein the resin B / M layer comprises a central flat resin B / M layer and a plurality of inclined resin B / M layers formed adjacent to the flat resin B / M layer. Method for manufacturing a double-sided light emitting display device, characterized in that. 9. The organic EL portion of the first and second modes is coated with an Al layer on the corresponding resin B / M layer, and then patterned using a mask, and the organic layer and the ITO layer are sequentially applied on the Al layer. And patterning the same using a mask. The method of claim 8, wherein the glass substrate and the plastic / glass member are formed through spacers. 9. The method of claim 8, wherein the organic EL portion of the first mode is a transmissive display, and the organic EL portion of the second mode is a reflective display through the reflective plate. 10. The method of claim 8, wherein the transmissive display by the organic EL unit in the first mode and the reflective display by the organic EL unit in the second mode are independently driven. Way. 10. The method of claim 8, wherein the transmissive display by the organic EL unit in the first mode and the reflective display by the organic EL unit in the second mode are integrally driven. .

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