JP2006012704A - Organic el panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an organic EL panel capable of displaying an image in a desired display form without increasing cost. <P>SOLUTION: This organic EL (electroluminescence) panel is composed by arranging, on a support substrate, a layered product composed by sandwiching an organic layer having at least a luminescent layer between a pair of electrodes. The organic EL panel is provided with: a transparent electrode 2 formed on a translucent glass substrate 1; an organic layer 4 located on the transparent electrode 2 for presenting luminescence; a back electrode 5 located on the organic layer 4 and facing the transparent electrode 2; and a plurality of adjustment parts 32 interlaid between the back electrode 5 and the transparent electrode 2 and formed in the form of dots in a luminescent region of the organic layer 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an organic EL (electroluminescence) panel in which a laminate in which an organic layer having at least a light emitting layer is sandwiched between a pair of electrodes is disposed on a support substrate.

Conventionally, as an organic EL panel, a transparent electrode (front electrode) serving as an anode by ITO (Indium Tin Oxide), a hole injection layer, a hole transport layer, a light emitting layer on a translucent substrate made of a glass material And an organic layer composed of an electron transport layer and a non-translucent back electrode such as aluminum (Al) serving as a cathode are sequentially laminated to form an organic EL element as a laminate, and a glass material covering the laminate There is known one in which a sealing member made of is disposed on a translucent substrate. Such an organic EL panel is disclosed in Patent Document 1, for example.
JP 2001-267066 A

  In such an organic EL panel, the material of the light emitting layer is limited, and it may be difficult to perform light emission display with a desired color. For this reason, it is necessary to use a color filter or the like for converting to a desired color, resulting in a problem of increasing costs. Further, there has been a demand for an organic EL panel that can cope with various display forms such as desired luminance and gradation display as well as color.

  Therefore, an object of the present invention is to provide an organic EL panel that can be displayed in a desired display form without increasing the cost.

  As described in claim 1, the organic EL panel of the present invention includes a transparent electrode formed on a translucent support substrate, an organic layer positioned on the transparent electrode and emitting light, and the organic A back electrode positioned on the layer and facing the transparent electrode; and a plurality of insulators interposed between the back electrode and the transparent electrode and provided in the light emitting region of the organic layer. It is characterized by.

  In addition, as described in claim 2, in the organic EL panel according to claim 1, the insulator is interposed between the transparent electrode and the organic layer, and has an outer diameter of 0.15 mm or less. A plurality of are provided.

  In addition, as described in claim 3, in the organic EL panel according to claim 1 or 2, the insulator is made of a translucent material.

  Moreover, as described in claim 4, in the organic EL panel according to claim 3, the insulator is made of a colored material.

  In addition, as described in claim 5, in the organic EL panel according to claim 4, the insulator is provided with a portion having a high arrangement density and a portion having a low arrangement density in the light emitting region. It is a feature.

  Moreover, the organic EL panel according to the present invention is an organic EL panel having a laminate in which an organic layer including at least a light emitting layer is sandwiched between a pair of electrodes on a support substrate. A plurality of insulators interposed between the pair of electrodes and provided in a dot shape in the light emitting region of the organic layer are provided.

  The present invention relates to an organic EL panel in which a stacked body in which an organic layer having at least a light emitting layer is sandwiched between a pair of electrodes is provided on a support substrate, and provides an organic EL panel that can be displayed in a desired display form without increasing costs. it can.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 and 2, an organic EL panel includes a glass substrate (support substrate) 1, a transparent electrode (electrode) 2, an insulating layer 3, an organic layer 4, a back electrode (electrode) 5, and a sealing member. 6, an adhesive member 7, and an adsorbing member 8.

  The glass substrate 1 is a translucent flat plate-like support substrate made of a glass material.

  The transparent electrode 2 is formed by forming a conductive material such as ITO on the glass substrate 1 by means such as a vapor deposition method or a sputtering method. The display portion 2a and a lead portion (wiring) formed from the display portion 2a are formed. Part) 2b and an electrode part 2c provided at the terminal part of the lead part 2b. The electrode portion 2c is provided near the end of the glass substrate 1.

  The insulating layer 3 is made of, for example, a polyimide-based insulating material, and a translucent material containing a fluorescent pigment can be applied. The insulating layer 3 is formed by means such as photolithography, for example. The insulating layer 3 is composed of a frame portion 31 corresponding to a contour for light emission display and an adjustment portion (insulator) 32 provided in the light emitting region, and is an organic layer sandwiched between the transparent electrode 2 and the back electrode 5. In FIG. 4, partial energization is prevented.

  The frame portion 31 is formed so as to slightly overlap the peripheral edge portion of the display portion 2a of the transparent electrode 2 in order to clearly display the outline of the light emitting region. The frame portion 31 has a cutout portion 31 a corresponding to an electrode portion described later of the back electrode 5, and is disposed so as to cover the lead portion 2 b in order to ensure insulation between the transparent electrode 2 and the back electrode 5. Is done.

  In addition, a large number of adjusting portions 32 are provided in a dot shape with an outer diameter of, for example, 0.15 mm in the light emitting region of the organic layer 4 partitioned by the frame portion 31. In this case, the adjustment unit 32 is provided with a portion having a high arrangement density and a portion having a low density in the light emitting region.

  The organic layer 4 only needs to have at least a light emitting layer, but in the embodiment of the present invention, a hole injection layer, a hole transport layer, a light emitting layer, and an electron transport layer are sequentially stacked by means such as vapor deposition. It is formed. The organic layer 4 is disposed with a predetermined size so as to correspond to the position where the frame portion 31 is formed in the insulating layer 3.

  The back electrode 5 is formed of a metal conductive material such as aluminum (Al), aluminum lithium (Al: Li), magnesium silver (Mg: Ag) or the like by means such as vapor deposition or sputtering, It is disposed on the organic layer 4. The back electrode 5 is electrically connected to a lead portion 5 a provided on one side of the glass substrate 1 so as to be adjacent to each electrode portion 2 c in the transparent electrode 2. An electrode portion 5b is provided at the end of the lead portion 5a, and the lead portion 5a and the electrode portion 5b are made of the same material as the transparent electrode 2.

  As described above, the laminated body A in which the transparent electrode 2, the insulating layer 3, the organic layer 4, and the back electrode 5 are sequentially laminated on the glass substrate 1, and the lead portions 2b and 5a and the electrodes 2c and 5b are formed. Thus, an organic EL panel capable of emitting light can be obtained.

  The sealing member 6 is formed by forming a recess 6a in a flat plate member made of, for example, a glass material. The sealing member 6 is formed so as to surround the recess 6 a, and a support portion 6 b for holding a predetermined interval (for example, 0.5 mm) with respect to the glass substrate 1 is hermetically sealed on the glass substrate 1 via the adhesive member 7. Thus, the sealing member 6 and the glass substrate 1 constitute an airtight space S in which the laminate A is stored. The sealing member 6 is configured slightly smaller than the glass substrate 1 so that the electrode portion 2c of the transparent electrode 2 and the electrode portion 5b of the back electrode 5 are exposed to the outside.

  As the adhesive member 7, for example, a fast-curing material made of an ultraviolet curable epoxy resin adhesive is used. The adhesive member 7 adheres the glass substrate 1 and the sealing member 6 while being linearly disposed on the support portion 6b surface of the sealing member 6 (the portion of the sealing member 6 that contacts the glass substrate 1). It is to be fixed. Further, the sealing member 6 and the glass substrate 1 are hermetically bonded by the adhesive member 7, thereby isolating the hermetic space S from the outside.

  The adsorption member 8 is disposed on the surface of the sealing member 6 facing the organic EL element 10, that is, near the periphery of the bottom surface of the recess 6a of the sealing member 6 (in the vicinity of the support portion 6b). The adsorbing member 8 has an adsorbent that physically or chemically adsorbs moisture such as activated alumina, molecular sieves, potassium oxide, and barium oxide, and has a viscosity such that the adsorbent does not flow. It is a member.

  The organic EL panel is configured by the above-described units. Such an organic EL panel includes a transparent electrode 2 formed on a translucent glass substrate 1, an organic layer 4 that is located on the transparent electrode 2 and emits light, and is transparent on the organic layer 4. A back electrode 5 facing the electrode 2, and a plurality of adjustment portions 32 that are interposed between the back electrode 5 and the transparent electrode 2 and are provided in a dotted shape within the light emitting region of the organic layer 4.

  Therefore, the adjustment unit 32 partially insulates between the back electrode 5 and the transparent electrode 2 so that no current flows through the organic layer 4, and this portion does not emit light, so that the luminance is slightly reduced. For this reason, it is possible to perform partial luminance adjustment or delicate luminance adjustment.

  Moreover, since the adjustment part 32 and the frame part 31 can form the organic EL panel mentioned above with the same material at the same process, brightness, a color tone, etc., without raising cost using extra parts. The display can be adjusted to a desired display form.

  Further, since the adjustment unit 32 is made of a colored and translucent material including a fluorescent color pigment, the light emitted from the organic layer 4 around the dot-like adjustment unit 32 is transmitted and refracted to be slightly colored. Can be changed.

  In addition, the adjustment unit 32 has an outer diameter of 0.15 mm or less that is difficult to view, and is translucent, so that the viewer of the organic EL panel is unaware of the presence of the adjustment unit 32. Display forms such as luminance and color can be adjusted.

  In addition, the adjustment unit 32 can display a gradation by, for example, shades of color or brightness and brightness by providing a dense portion with a high arrangement density and a sparse portion with a low density. Further, by providing the adjustment unit 32 in a partially dense manner, it is possible to partially adjust the luminance and color. In addition, by arranging the outer diameters (areas) of the adjustment unit 32 so as to be different from each other, it is possible to obtain the same shade of color or brightness brightness as in the adjustment of the display mode by the density of the arrangement adjustment unit 32. it can.

  In addition, although the adjustment part 32 in embodiment mentioned above gave and demonstrated the example about the structure provided between the transparent electrode 2 and the organic layer 4, this invention is not limited to this and is insulated. The adjustment part which becomes a body should just be provided between a pair of electrodes which pinch | interpose an organic layer, for example, the structure provided between a back electrode and an organic layer may be sufficient. Further, one electrode having a light-shielding property may be provided on the support substrate, and the adjustment portion serving as an insulator, the organic layer, and the other transparent electrode may be laminated in order, and the same effect as the above-described embodiment may be obtained. can get.

The perspective view which shows the organic electroluminescent panel of embodiment of this invention. Sectional drawing of the organic electroluminescent panel of embodiment same as the above.

Explanation of symbols

1 Glass substrate (support member)
2 Transparent electrode (electrode)
2b Lead part (wiring part)
32 Adjustment part (insulator)
4 Organic layer 5 Back electrode (electrode)
5a Lead part (wiring part)

Claims (6)

  A transparent electrode formed on a translucent support substrate, an organic layer that emits light on the transparent electrode, a back electrode that is positioned on the organic layer and faces the transparent electrode, An organic EL panel comprising: a plurality of insulators interposed between the back electrode and the transparent electrode and provided in the light emitting region of the organic layer.   2. The organic EL panel according to claim 1, wherein the insulator is interposed between the transparent electrode and the organic layer, and a plurality of insulators having an outer diameter of 0.15 mm or less are provided.   The organic EL panel according to claim 1, wherein the insulator is made of a translucent material.   The organic EL panel according to claim 3, wherein the insulator is made of a colored material.   The organic EL panel according to claim 4, wherein the insulator is provided with a portion having a high arrangement density and a portion having a low arrangement density in the light emitting region. An organic EL panel comprising a laminate that sandwiches an organic layer including at least a light emitting layer between a pair of electrodes on a support substrate,
An organic EL panel comprising a plurality of insulators interposed between the pair of electrodes and provided in a dot shape within the light emitting region of the organic layer.

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