JP2006228457A - Electroluminescent light source body and electroluminescent light source device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an EL light source body having high mechanical strength, that is easy to handle, and capable of uniformly supplying power to a luminous layer, as well as emitting a light with little brightness speck, and an EL light source device equipped with a plurality of such EL light source bodies. <P>SOLUTION: The EL light source body is constituted of a buffer member arranged overlapped on a translucent support substrate 2, an EL element 1, a conductive elastic body 4, a connecting conductor 5, a pressing member 7 or the like. The EL element 1 is constituted of an element board 1a and a sealing board 1b, arranged facing each other, between which is formed a luminous layer. An element electrode 1e, constituted of, for example, ITO (indium tin oxide), is guided out along a peripheral edge (side) of the sealing board 1b and arranged in extension on a face of the element board 1a facing the sealing board 1b. The conductive elastic body 4 is arranged along and facing the element electrode 1e, connected and conducted to the element electrode 1e, and the connecting conductor 5, arranged along and facing the conductive elastic body 4, is connected and conducted to the conductive elastic body 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an EL light source using an EL (electroluminescence) light emitting element, particularly an organic EL (organic EL light emitting element), and an EL light source device using such an EL light source.

  In recent years, the development of EL light-emitting elements, particularly organic EL light-emitting elements, has been attracting attention as a planar light source. An organic EL light-emitting element has an organic thin film containing a fluorescent organic compound sandwiched between a positive electrode and a negative electrode as a light-emitting layer, and injects electrons and holes (holes) from each electrode into the organic thin film, thereby providing a fluorescent property. Excitons of the compound are generated, and light emitted when the excitons return to the ground state is extracted to the outside.

  In such an EL light emitting element, it is necessary to form a planar electrode, to extract light from the light emitting layer to the outside, to form an organic thin film, to improve moisture resistance, etc. A glass substrate is generally used as the substrate and the sealing substrate.

  Moreover, since it is necessary to take out the light from a light emitting layer outside, a transparent electrode is used as an electrode (element electrode). As the transparent electrode (element electrode), ITO (indium tin oxide) is generally used because of its good transparency and easy manufacture.

  However, the glass substrate used as the element substrate and the sealing substrate is formed as thin as possible in order to improve the productivity of the EL light emitting element, and is usually as thin as several millimeters. Therefore, the conventional EL light emitting device has problems such as being easily affected by an external force due to its low mechanical strength, being easily damaged, and having a large area.

  In addition, ITO used as an element electrode is a conductor, but has a high resistivity, and the power supplied from the local connection with the external terminal has a large voltage drop due to the resistance of the ITO, and the power supplied to the light emitting layer As the distance from the connection point decreases, there are problems such as luminance spots and the fact that a large area cannot be constructed.

  In order to improve the mechanical strength of an EL light-emitting element, an EL light-emitting element using a protective transparent substrate in addition to a glass substrate as an element substrate is known (see, for example, Patent Document 1; hereinafter referred to as a conventional example). ). In Patent Document 1, an element electrode is represented as an anode layer, an EL light emitting element is represented as an organic EL panel, and a protective transparent substrate is represented as a panel mounting substrate.

  In the conventional example, the mechanical strength can be improved because the panel mounting substrate is used. However, since the connection portion to the element electrode is merely configured locally as a pad shape or a pin shape, the resistance of the element electrode is reduced. It is difficult to prevent a voltage drop due to the above, and it is difficult to eliminate luminance unevenness, and it is difficult to construct a large area EL light emitting element by itself.

In addition, since the connection portion of one of the element electrodes is formed so as to overlap the light emitting layer, there is a problem that a stable light emitting layer having a large influence on the light emitting layer cannot be formed. In addition, a large-area light-emitting panel is formed by mounting a plurality of EL light-emitting elements on a panel substrate. However, since the connection portions are pin-shaped, handling is not easy and replacement of each EL light-emitting element is not easy. There is no problem.
JP 2004-69774 A

  The present invention has been made in view of such a situation, and by placing the element substrate of the EL light emitting element on the translucent support substrate to protect the EL light emitting element from external force, the influence (damage etc.) due to the external force is achieved. Therefore, an object of the present invention is to provide an EL light source body that has high mechanical strength and is easy to handle.

  In addition, the present invention provides an element electrode by pressing a conductive elastic body and a connecting conductor arranged along and connected to the outer periphery of the sealing substrate of the EL light emitting element toward the element electrode by a pressing member. By connecting the connecting conductor to the light emitting layer, it has a structure that does not cause any mechanical influence on the light emitting layer, prevents a voltage drop due to the resistance of the element electrode, and supplies power uniformly to the light emitting layer to cause luminance fluctuations. Another object of the present invention is to provide an EL light source body capable of emitting light with a small amount.

  In addition, the present invention simplifies the manufacturing process by pressing the conductive elastic body and the connecting conductor by the pressing member to make the element electrode and the connecting conductor conductive, and the coefficient of thermal expansion between the element electrode and the connecting conductor. Another object of the present invention is to provide a highly reliable EL light source body that does not cause the problem of poor connection between the element electrode and the connecting conductor based on the difference of the above.

  In addition, the present invention improves the adhesion and conductivity between the element electrode and the connecting conductor by conducting the element electrode and the connecting conductor through the conductive elastic body, thereby reducing the voltage drop due to the resistance of the element electrode. Another object is to provide a highly reliable EL light source body capable of suppressing the above.

  Further, the present invention ensures that the conductive elastic body is pressed against the element electrode by making the pressing member into a frame shape, and the element electrode and the connecting conductor are made continuous (equal) along the element electrode, Another object of the present invention is to provide a highly reliable EL light source body that can be reliably conducted.

  Another object of the present invention is to provide an EL light source body with good luminous efficiency that can be driven with low voltage, low current, and low power consumption by using an organic EL light emitting element as the EL light emitting element.

  In addition, the present invention provides a large-area EL light source device having a shape corresponding to the arrangement of the EL light source body by disposing a plurality of EL light source bodies according to the present invention on the translucent support substrate. It is another object to provide an EL light source device that can be easily mounted and replaced (maintenance) and is easy to handle.

  An EL light source body according to the present invention includes an EL light emitting element having an element substrate and a sealing substrate disposed to face the element substrate, and a translucent support substrate on which the element substrate is placed. Two element electrodes having different polarities respectively led out along the side of the sealing substrate and disposed on the element substrate, and disposed along the element electrode and connected to the element electrode. A conductive elastic body, a connecting conductor disposed along the conductive elastic body and connected to the conductive elastic body, and pressing the conductive elastic body and the connecting conductor toward the element electrode toward the element electrode; And a pressing member for conducting the device electrode.

  With this configuration, the influence of external force can be prevented, so that the EL light source body with high mechanical strength and easy handling can be obtained. Since a uniform voltage is applied to the element electrode along the side (in the side direction) by the connecting conductor arranged along the element electrode, a voltage drop in the side direction due to the resistance of the element electrode can be prevented, and the light emitting layer Since it is possible to apply a uniform voltage (power supply), it is possible to prevent the occurrence of luminance spots. Further, by using a conductive elastic body and a pressing member, it is possible to improve the adhesion and conductivity between the connecting conductor and the element electrode (reduce the resistance between the connecting conductor and the element electrode), and the EL light emitting element It is possible to prevent deterioration of conduction between the two conductors due to the difference in coefficient of thermal expansion between the conductor and the connecting conductor.

  The EL light source body according to the present invention includes a connection member that is connected to the connecting conductor and supplies electric power.

  With this configuration, power can be easily supplied from the outside of the EL light source body.

  In the EL light source body according to the present invention, the connection member is engaged with the pressing member.

  With this configuration, it is easy to align the connecting conductor and the connecting member, and the structure of the connecting member and the pressing member can be simplified, so that an EL light source body that can be easily assembled is obtained.

  In the EL light source body according to the present invention, the pressing member is arranged on the outer periphery of the sealing substrate so as to correspond to the element substrate, and has a frame shape.

  With this configuration, the periphery of the element substrate can be evenly pressed by the four sides of the EL light emitting element, the conduction between the element electrode and the connecting conductor is ensured, and the EL light emitting element can be stably transmitted. Therefore, the EL light source body with high mechanical strength and high reliability can be obtained.

  In the EL light source body according to the present invention, the pressing member is engaged with an alignment substrate disposed on the outer periphery of the EL light emitting element so as to face the translucent support substrate.

  With this configuration, the pressing accuracy of the pressing member can be improved, and the alignment in the pressing direction and the alignment of the connecting member with respect to the connecting conductor can be reliably performed.

  In the EL light source body according to the present invention, a power supply member connected to the connection member and supplying the power is engaged with the matching substrate.

  With this configuration, it is possible to easily supply power to the connection member from the outside via the power supply member.

  In the EL light source body according to the present invention, a part of the power supply member is sandwiched between the translucent support substrate and the alignment substrate.

  With this configuration, when, for example, a film-like wiring pattern is applied as a part of the power supply member, it is only necessary to sandwich the wiring pattern between the translucent support substrate and the matching substrate. Can be freely set, and the formation of the power feeding member is facilitated. Further, since the power feeding member is shielded from the outside, safety and reliability can be improved.

  In the EL light source body according to the present invention, the conductive elastic body and the connecting conductor are plate-shaped.

  With this configuration, manufacturing is facilitated, and the connecting conductors and the element electrodes can be reliably connected to each other because they can be laminated in a plate shape, and alignment is facilitated.

  In the EL light source body according to the present invention, the conductive elastic body has a cylindrical shape, and the connecting conductor is disposed on a cylindrical core portion.

  With this configuration, it is not necessary to align the connecting conductor and the conductive elastic body, the assembly process is facilitated, and the positioning of the element electrode and the connecting conductor is also facilitated.

  In the EL light source body according to the present invention, a buffer member is provided between the translucent support substrate and the element substrate.

  With this configuration, the element substrate can be stably supported, so that the element substrate can be prevented from being damaged. Further, the buffer member can be a mask material or a polarizing plate.

  In the EL light source body according to the present invention, a heat radiating member is provided on the sealing substrate.

  With this configuration, heat dissipation can be improved and temperature rise during operation can be prevented, so that a highly reliable EL light source body that can emit light with stable luminance can be obtained.

  In the EL light source body according to the present invention, the EL light emitting element is an organic EL light emitting element.

  With this configuration, an EL light source body with high luminous efficiency that can be driven with low voltage, low current, and low power consumption is obtained.

  The EL light source device according to the present invention is characterized in that a plurality of EL light source bodies according to the present invention are arranged on the translucent support substrate.

  With this configuration, the EL light source body can be easily handled and replaced, and a large-area EL light source device having a shape corresponding to the arrangement of the EL light source body can be obtained.

  According to the EL light source body according to the present invention, since the EL light emitting element (element substrate) is placed on the translucent support substrate, it is possible to prevent the influence of the external force on the EL light emitting element, so that high mechanical strength is obtained. Therefore, it is easy to handle and high reliability can be obtained.

  According to the EL light source body of the present invention, a conductive elastic body that is continuously (equally) arranged and connected along the element electrode led out along the side (periphery) of the sealing substrate of the EL light emitting element, and By pressing the connecting conductor to the element electrode side with a pressing member to make the element electrode and the connecting conductor conductive, the mechanical effect on the light emitting layer does not occur at all, and a uniform voltage is applied in the side direction. By applying the voltage to the light emitting layer, it is possible to prevent a voltage drop due to the resistance of the element electrode and to supply power uniformly to the light emitting layer, so that it is possible to emit light with less luminance unevenness.

  According to the EL light source body according to the present invention, since the conductive elastic body and the connecting conductor are pressed by the pressing member to make the element electrode and the connecting conductor conductive, the manufacturing process can be simplified. As a result, it is possible to apply a uniform voltage to the element electrodes. Further, since there is no problem of poor connection between the element electrode and the connecting conductor based on the difference in thermal expansion coefficient between the element electrode and the connecting conductor, there is an effect that high reliability can be obtained.

  According to the EL light source body according to the present invention, since the connecting member that supplies power is connected to the connecting conductor, there is an effect that power can be easily supplied to the connecting conductor. Further, since the connecting member is engaged with the pressing member, it is easy to align the connecting conductor and the connecting member, and the connecting member and the pressing member can be integrated to simplify the structure. There is an effect that it becomes easy.

  According to the EL light source body according to the present invention, since the pressing member has a frame shape, the conductive elastic body and the connecting conductor can be evenly pressed against the element electrode, so that the element electrode and the connecting conductor are continuously formed. (Equally), it is possible to reliably conduct, and there is an effect that high mechanical strength and high reliability can be obtained.

  According to the EL light source body according to the present invention, the pressing member is engaged with the alignment substrate disposed opposite to the translucent support substrate on the outer periphery (outside of the peripheral edge) of the EL light emitting element. The accuracy can be improved, and there is an effect that the alignment in the pressing direction and the alignment of the connecting member with respect to the connecting conductor can be reliably performed.

  According to the EL light source body according to the present invention, since the power supply member connected to the connection member is engaged with the matching substrate, there is an effect that power can be easily supplied from the outside to the connection member via the power supply member. .

  According to the EL light source body according to the present invention, a part of the power supply member (wiring pattern) is sandwiched between the translucent support substrate and the matching substrate, so that the arrangement of the power supply member (wiring pattern) can be freely set. The power feeding member can be easily formed.

  According to the EL light source body of the present invention, since an organic EL light emitting element is used as the EL light emitting element, it is possible to drive with low voltage, low current, and low power consumption, and to improve the light emission efficiency.

  According to the EL light source device according to the present invention, since a plurality of EL light source bodies according to the present invention are arranged on the translucent support substrate, a light emitting surface having a large area with a shape corresponding to the arrangement of the EL light source bodies (light emission) Part) can be obtained. Further, the EL light source body can be easily mounted and replaced (maintenance), and the handling is easy.

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

<Embodiment 1>
FIG. 1 is an exploded perspective view showing a part of the structure of the EL light source body according to Embodiment 1 of the present invention.

  The EL light source body according to the present embodiment includes an EL light-emitting element 1, a translucent support substrate 2 (see FIG. 4), a buffer member 3, a conductive elastic body 4, a connecting conductor 5, and a press, which are arranged in a stacked manner. It is comprised by the member 7 grade | etc.,. Further, a connecting point 5c is formed on the connecting conductor 5, and a connecting member 6 is connected to the connecting point 5c.

  The EL light-emitting element 1 is composed of an element substrate 1a and a sealing substrate 1b arranged to face each other, and a light-emitting layer (not shown) is formed therebetween. A positive hole transport layer (not shown) is formed on the plus side and an electron transport layer (not shown) is formed on the minus side with the light emitting layer interposed therebetween. An organic EL light-emitting element is formed by forming a light-emitting layer with organic molecules.

  When the EL light emitting element 1 is an organic EL light emitting element, it can be driven with a low voltage and a low current, and can be an EL light source body having high emission luminance with respect to the supplied power and good light emission efficiency. Various types of internal structures such as the light-emitting layer of the EL light-emitting element 1 and the hole transport layer and the electron transport layer stacked on the light-emitting layer have been proposed and are not limited to the above-described structures.

  The element substrate 1a is required to be transparent in order to extract light from the light emitting portion 1d (see FIG. 2) to the outside, and the element electrode 1e (plus element electrode 1ep and minus element electrode 1em. Plus element electrode 1ep and minus element) When it is not necessary to distinguish the electrodes 1em, the element electrodes 1e) need to be formed. The sealing substrate 1b is preferably a glass substrate, like the element substrate 1a.

  The element electrode 1e is led out along the outer periphery (side) of the sealing substrate 1b on the surface of the element substrate 1a facing the sealing substrate 1b. Since the element electrode 1e is required to be transparent, it is made of, for example, ITO (indium tin oxide), and the element electrode 1e has at least two electrodes having different polarities (plus and minus) (the above-described plus element electrode 1ep and minus). Element electrodes 1em) are respectively formed.

  The positive conductive elastic body 4p is disposed so as to face along the positive element electrode 1ep, and is laminated and connected to the positive element electrode 1ep. Further, the negative conductive elastic body 4m is disposed so as to face the negative element electrode 1em, and is laminated and connected to the negative element electrode 1em (the positive conductive elastic body 4p and the negative conductive elastic body 4m are distinguished from each other). When it is not necessary to do this, it is referred to as a conductive elastic body 4). As the conductive elastic body 4, for example, conductive rubber can be applied.

  The plus connecting conductor 5p is disposed so as to face along the plus conductive elastic body 4p, and is laminated and connected to the plus conductive elastic body 4p. The negative connecting conductor 5m is disposed so as to face the negative conductive elastic body 4m, and is laminated and connected to the negative conductive elastic body 4m (it is not necessary to distinguish the positive connecting conductor 5p and the negative connecting conductor 5m). In this case, it is called the connecting conductor 5). As the connection conductor 5, a metal plate with high electrical conductivity, such as a copper plate, can be applied, for example. Since the conductive elastic body 4 and the connecting conductor 5 are pressed in the direction of the element electrode 1 e by the pressing member 7, the connecting conductor 5 and the element electrode 1 e are electrically connected via the conductive elastic body 4.

  The conductive elastic body 4 and the connecting conductor 5 are arranged along the element electrode 1e and are continuously (equally) connected (conducted) in the side direction of the sealing substrate 1b, so that the element electrode 1e is uniform in the side direction. Can be applied. That is, since a voltage drop in the side direction due to the resistance of the element electrode 1e can be prevented and a uniform voltage can be applied to the element electrode 1e, it is possible to supply uniform power to the light emitting layer. The occurrence of spots can be prevented.

  Since the element electrode 1e and the connecting conductor 5 are electrically connected via the conductive elastic body 4, the adhesion and conductivity between the element electrode 1e and the connecting conductor 5 can be increased and made uniform. The contact resistance between the connecting conductor 5 and the element electrode 1e can be reduced. Further, since conduction is made through the conductive elastic body 4, it is not necessary to bond (connect) the conductive material between the element electrode 1 e and the connecting conductor 5 using a conductive adhesive or the like. That is, since it is only necessary to press the conductive elastic body 4 and the connecting conductor 5, the manufacturing process can be simplified, and the conductive adhesive based on the difference in thermal expansion coefficient between the element substrate 1 a and the connecting conductor 5. Thus, a highly reliable EL light source body that does not cause the problem of poor connection such as peeling of the substrate is obtained.

  The connecting conductor 5 is formed to have a length that protrudes to the outside of the pressing member 7, and a connection point 5c is formed at the tip. A connection member 6 such as a lead wire can be connected to the connection point 5c. If a voltage is applied to the connecting member 6 from the outside, power is supplied to the light emitting layer through the connecting conductor 5, the conductive elastic body 4, and the element electrode 1e, and light can be emitted from the light emitting portion 1d to the outside. Since the connecting conductor 5 and the connecting member 6 are connected, it is possible to easily apply a voltage to the connecting conductor 5 from the outside, and it is possible to easily supply electric power from the outside to the light emitting layer.

  The pressing member 7 is formed in the shape of a frame arranged corresponding to the element substrate 1a on the outer periphery (outside of the peripheral edge) of the sealing substrate 1b in order to uniformly apply a pressing force to the element electrode 1e. Is preferred. That is, the pressing member 7 has a shape that uniformly presses the periphery of the element substrate 1a on the four sides of the EL light emitting element. Further, by adopting a frame shape, the arrangement of the pressing member 7 is facilitated, the mechanical strength is increased, and a mechanically stable and highly reliable EL light source body is obtained. Needless to say, it may be configured corresponding to each element electrode 1e instead of the frame shape.

  Further, on the outer periphery of the sealing substrate 1b where the conductive elastic body 4 and the connecting conductor 5 are not disposed (the right front side and the left front side in the figure), the total thickness of the conductive elastic body 4 and the connecting conductor 5 is By disposing non-conductive elastic bodies (not shown) having the same thickness as spacers, the pressing force of the pressing member 7 can be made uniform evenly. The pressing member 7 can be molded from an appropriate synthetic resin such as plastic.

  The buffer member 3 is provided in a frame shape between the periphery of the EL light emitting element 1 (element substrate 1a) and the translucent support substrate 2, and stably supports the element substrate 1a, thereby preventing damage to the element substrate 1a. The mechanical strength of the EL light source body can be improved.

  2A and 2B are explanatory diagrams of an EL light-emitting element applied to the EL light source body according to Embodiment 1 of the present invention. FIG. 2A is a plan view seen from the side from which the element electrode is derived, and FIG. It is a side view in the arrow A direction of (A).

  In the EL light emitting device 1, a light emitting layer or the like is laminated and enclosed between the element substrate 1a and the sealing substrate 1b as described above. The element substrate 1a and the sealing substrate 1b are, for example, 10 to 20 cm square glass substrates, and the thickness is, for example, about 1 to 2 mm. Since the element electrode 1e is formed on the peripheral edge (peripheral region, peripheral edge portion) of the element substrate 1a along the side of the sealing substrate 1b, the peripheral edge of the element substrate 1a is the peripheral edge of the sealing substrate 1b. It is configured to be arranged on the outer side.

  For example, a positive element electrode 1ep for applying a positive voltage is arranged on the left edge of the element substrate 1a on the drawing, and a negative element electrode 1em for applying a negative voltage is arranged on the upper edge of the element substrate 1a on the drawing, for example. This state is illustrated. The light emitting portion 1d is defined by the plus element electrode 1ep and the minus element electrode 1em.

  The element electrode 1e is illustrated as being derived and arranged on two adjacent sides in consideration of easiness of understanding and the like, but it is naturally possible to derive and arrange on two opposite sides. It is also possible to derive and arrange on four sides.

  FIG. 3 is an explanatory view showing an arrangement state of the conductive elastic body connected to the EL light emitting element applied to the EL light source body according to Embodiment 1 of the present invention and the connecting conductor, and FIG. The top view seen from the side formed, (B) is a side view in the arrow A direction of (A).

  As described above, the plus element electrode 1ep and the minus element electrode 1em led out along the side of the sealing substrate 1b are arranged and formed on the surface of the element substrate 1a of the EL light emitting element 1. A positive conductive elastic body 4p and a positive connecting conductor 5p are stacked and superimposed on the positive element electrode 1ep, and a negative conductive elastic body 4m and a negative connecting conductor 5m are stacked and stacked on the negative element electrode 1em.

  The conductive elastic body 4 is formed, for example, in a plate shape, has elasticity, and is pressed, so that it can be reliably connected to the element electrode 1e. Moreover, since it is plate-shaped, manufacture is easy and it can be set as high dimensional accuracy.

  The connecting conductor 5 is made of, for example, plate-like copper (copper plate), can be easily manufactured, can have high dimensional accuracy, and can be reliably connected to the plate-like conductive elastic body 4. Further, the connecting conductor 5 has a much lower resistivity than the element electrode 1e (ITO), so that the resistance can be reduced. That is, an equal voltage can be applied to the element electrode 1e regardless of the position on the side corresponding to the sealing substrate 1b, and a voltage drop due to the resistance of the element electrode 1e can be prevented. Therefore, since it is possible to prevent the occurrence of luminance spots in the light emitting portion 1d, a large area light emitting portion 1d (that is, an EL light source body) can be obtained.

  Since the connecting conductor 5 presses the element electrode 1e through the conductive elastic body 4, the element electrode 1e and the element substrate 1a are not mechanically damaged. Further, since the conductive elastic body 4 and the connecting conductor 5 are disposed along the outer periphery (outside of the peripheral edge) of the sealing substrate 1b, the light emitting layer is not damaged and the light emitting portion 1d is not damaged. Therefore, it is possible to obtain a stable and reliable EL light source body.

  The connection point 5c formed at the tip of the connecting conductor 5 is outside the element substrate 1a (and further outside the pressing member 7 (not shown) as described above) so that the connection to the outside (connection member 6) can be easily performed. ) Protruding and extending.

  As described above, a non-conductive spacer (not shown) is disposed on the side where the element electrode 1e, the conductive elastic body 4, and the connecting conductor 5 are not disposed, so that the pressing force of the pressing member 7 is evenly distributed. It is configured to be applied to 1a.

  FIG. 4 shows a state in which the translucent support substrate, the buffer member, the EL light emitting element, the conductive elastic body, and the connecting conductor are overlapped and pressed by the pressing member in the direction of arrow BB in FIG. It is principal part sectional drawing.

  An EL light emitting element 1 (an element substrate 1a having a light emitting portion 1d) is placed (superimposed) on the translucent support substrate 2. Note that the internal structure of the EL light-emitting element 1 is omitted for easy understanding of the present invention. The buffer member 3 is arranged corresponding to the non-light emitting portion generated at the periphery of the EL light emitting element 1 (element substrate 1a). As shown in FIG. 3, the conductive elastic body 4 and the connecting conductor 5 are superimposed on and connected to the element electrode 1e, and the conductive elastic body 4 and the connecting conductor 5 are pressed toward the element electrode 1e by the pressing member 7. ing. Since the pressing member 7 is mechanically fixed to the translucent support substrate 2 by an appropriate fixing member 8, the conductive elastic body 4 and the connecting conductor 5 can be reliably pressed in the direction of the element electrode 1e. .

  The translucent support substrate 2 is made of acrylic resin or tempered glass having a higher strength than the element substrate 1a and the sealing substrate 1b (glass substrate). The thickness of the translucent support substrate 2 can be set as appropriate in order to ensure the required strength, and is set to, for example, 5 to 10 mm.

  Since the EL light-emitting element 1 is mounted on the translucent support substrate 2, the EL light source body can be increased in mechanical strength, is not damaged by external force, and is easy to handle and highly reliable. Can have sex.

  Since the buffer member 3 is arranged corresponding to the periphery of the EL light emitting element 1 (element substrate 1a), it functions as a mask material for masking the non-light emitting part (the outer peripheral part of the element substrate 1a) of the EL light emitting element 1. be able to. By masking (shielding) the non-light emitting portion (outer peripheral portion), the aesthetic appearance (designability) when used as an illumination device or the like is improved. As the buffer member 3, silicone rubber or the like can be applied, and a color can be obtained by mixing an appropriate dye (pigment or the like).

  Although the buffer member 3 has a frame shape, for example, when it is disposed as a polarizing plate, it is preferably disposed on the entire surface (front surface) of the element substrate 1a. If the polarizing plate (circularly polarizing plate) is disposed on the entire surface, it is possible to prevent a phenomenon in which the light emitting portion 1d (element substrate 1a) of the EL light emitting element 1 is visually recognized in a light-off state, for example.

  The fixing member 8 includes an appropriate member such as a screw or an adhesive (not shown). One end is appropriately fixed to the translucent support substrate 2 and the pressing member 7 is appropriately fixed at the other end. can do. The fixing member 8 can be made of a synthetic resin or the like, or can have a suitable elasticity. When the fixing member 8 has elasticity, the pressing action by the pressing member 7 can be functioned more reliably and stably.

<Embodiment 2>
FIG. 5 is a diagram showing a state in which the translucent support substrate, the buffer member, the EL light emitting element, the conductive elastic body, and the connecting conductor of the EL light source body according to Embodiment 2 of the present invention are superimposed and pressed by the pressing member. FIG. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  In the present embodiment, the matching substrate 9 is disposed around (outer periphery) of the EL light emitting element 1 so as to face (contact) the translucent support substrate 2. A pressing member 7 is fixed (engaged) to the alignment substrate 9 by an appropriate fixing member 8 (for example, a screw). The alignment substrate 9 is made of, for example, acrylic resin, and is formed to have an appropriate thickness so that the pressing position of the pressing member 7 is aligned and the pressing force is adjusted.

  It is preferable that the pressing member 7 has a frame shape as in the first embodiment. Further, the connecting member 6 is engaged with the pressing member 7, and the connecting member 6 is connected (connected) to the connecting conductor 5 by fixing the pressing member 7 to the alignment substrate 9. 5 and the connection member 6 can be easily aligned, and the structure of the connection member 6 and the pressing member 7 can be simplified, so that assembly is facilitated. With this configuration, electric power can be easily supplied from the outside to the element electrode 1 e through the connection member 6, the connecting conductor 5, and the conductive elastic body 4. Needless to say, the connecting member 6 and the pressing member 7 may be formed in advance as an integrated body.

  Since the connecting member 6 is formed by engaging with the inner surface of the pressing member 7 (the surface on the side corresponding to the alignment substrate 9 and the surface on the side corresponding to the element electrode 1e), it is not exposed to the outside. Since there is no external influence, stable power supply is possible. Further, since the connection member 6 is connected to the connecting conductor 5 in a bridge shape, the end portion of the EL light emitting element 1 is not damaged and a mechanically stable EL light source body can be obtained. By forming an appropriate connection contact at the tip of the connection member 6, the connection between the connecting conductor 5 and the connection member 6 can be made more reliable. Needless to say, the connecting member 6 may be configured to be disposed on the outer surface of the pressing member 7.

  A power supply member 10 (through conductor 10a, wiring pattern 10b, and through conductor 10c) is engaged (formed, mounted) on the matching substrate 9, and one end of the power supply member 10 (through conductor 10a) is connected to the connection member 6. (Communication) and power is supplied. Further, the other end (through conductor 10c) of the power supply member 10 is connected (communication) to an external power supply line 11 and is supplied with power from the outside. The through conductors 10a and 10c can be configured by an appropriate metal conductor, and can be configured by applying various shapes such as a spring, a screw, and a rod. Further, the through conductor 10a and the through conductor 10c are connected by a wiring pattern 10b.

  Since the pattern shape of the wiring pattern 10b can be set freely, the position of the through conductor 10c can be set freely, so that power can be easily supplied from the outside. The wiring pattern 10b constituting a part of the power supply member 10 is securely fixed and mechanically stable by being sandwiched between the translucent support substrate 2 and the matching substrate 9. 10 can be used.

  For example, a film substrate can be used as the wiring pattern 10b. Moreover, since the main part (the through conductor 10a and the wiring pattern 10b) of the power supply member 10 is shielded from the outside, an EL light source body with high safety and reliability can be obtained.

<Embodiment 3>
6A and 6B are explanatory views for explaining a conductive elastic body and a connecting conductor applied to an EL light source body according to Embodiment 3 of the present invention, FIG. 6A is a perspective view, and FIG. FIG. The same components as those in the first and second embodiments are denoted by the same reference numerals and description thereof will be omitted as appropriate.

  In the present embodiment, the conductive elastic body 4 and the connecting conductor 5 used in the first embodiment are configured concentrically. That is, the conductive elastic body 4 has a cylindrical shape, and the connecting conductor 5 is disposed on the cylindrical core portion. Concentricity eliminates the need for aligning the conductive elastic body 4 and the connecting conductor 5 during assembly, simplifying the assembly process, and allowing easy manufacture.

  FIG. 2B shows a state in which the conductive elastic body 4 superposed on the element electrode 1e is pressed by the pressing member 7 and is slightly flattened. Since the conductive elastic body 4 only needs to be disposed on the element electrode 1e and pressed, it is easy to align the element electrode 1e and the conductive elastic body 4 (pressing member 7), and the assembly process is further simplified. Can be

<Embodiment 4>
FIG. 7 is a cross-sectional view of an essential part of an EL light source body according to Embodiment 4 of the present invention. The same components as those in the first to third embodiments are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  In the present embodiment, a heat sink 13 as a heat radiating member is provided on the sealing substrate 1b of the EL light source body (FIG. 4) of the first embodiment. A heat sink 13 is provided on the sealing substrate 1b via the heat conductive elastic body 12. The heat conductive elastic body 12 is made of, for example, silicone rubber, and the heat sink 13 is made of, for example, aluminum.

  The heat conductive elastic body 12 functions as a buffer material that protects the sealing substrate 1b from external force, and improves the adhesion between the sealing substrate 1b and the heat sink 13, so that the heat from the sealing substrate 1b is transferred to the heat sink 13. It functions as a heat transfer material that conducts heat efficiently.

  With this configuration, the heat dissipation characteristics of the EL light emitting element 1 can be improved, and an EL light source body having excellent thermal characteristics and stable light emission characteristics can be obtained. In other embodiments, it goes without saying that the heat sink 13 as a heat radiating member can be provided similarly.

<Embodiment 5>
FIG. 8 is a plan view of an essential part of an EL light source device according to Embodiment 5 of the present invention. The same components as those in the first to fourth embodiments are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  In the present embodiment, an EL light source device is formed by arranging a plurality of EL light source bodies according to the second embodiment (FIG. 5) on a translucent support substrate 2. In the figure, the wiring pattern 10b (through conductor 10c) is shown on the assumption that the matching substrate 9 is transparent. By providing the matching substrate 9 with a hanging tool 14 having an appropriate shape, the EL light source device can be a ceiling lamp, for example.

  By arranging a plurality of EL light source bodies on the translucent support substrate 2, an EL light source device having a shape (design) corresponding to the number can be obtained. For example, if a plurality of devices are juxtaposed in one direction, an EL light source device having a planar shape, a long shape and a large area is obtained.

  Further, by configuring the fixing member 8 with a removable member such as a screw, the EL light emitting element 1 can be easily mounted and replaced (maintenance), and an illumination device using a fluorescent lamp (fluorescent tube) or the like. As in the case of, the EL light source device can be easily handled.

It is a disassembled perspective view which decomposes | disassembles the EL light source body which concerns on Embodiment 1 of this invention, and shows a one part structure. It is explanatory drawing of EL light emitting element applied to the EL light source body which concerns on Embodiment 1 of this invention, (A) is the top view seen from the side where the element electrode was derived | led-out, (B) is (A). It is a side view in the arrow A direction. It is explanatory drawing which shows the arrangement | positioning condition of the electroconductive elastic body connected to the EL light emitting element applied to the EL light source body which concerns on Embodiment 1 of this invention, and a connection conductor, (A) is an element electrode formed. The top view seen from the side, (B) is a side view in the arrow A direction of (A). FIG. 3A is a cross-sectional view of an essential part showing a state in which a translucent support substrate, a buffer member, an EL light emitting element, a conductive elastic body, and a connecting conductor are superimposed and pressed by a pressing member in the direction of arrow BB in FIG. It is. It is principal part sectional drawing which shows the state which superimposed the translucent support substrate of the EL light source body concerning Embodiment 2 of this invention, a buffer member, EL light emitting element, a conductive elastic body, and a connection conductor, and was pressed with the press member. is there. It is explanatory drawing explaining the electroconductive elastic body and connection conductor which are applied to the EL light source body which concerns on Embodiment 3 of this invention, (A) is a perspective view, (B) shows the superimposed state to an element electrode. It is sectional drawing shown. It is principal part sectional drawing of the EL light source body which concerns on Embodiment 4 of this invention. It is a principal part top view of the EL light source device which concerns on Embodiment 5 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 EL light emitting element 1a Element board | substrate 1b Sealing board | substrate 1d Light emission part 1e Element electrode 1ep Plus element electrode 1em Minus element electrode 2 Translucent support board | substrate 3 Buffer member 4 Conductive elastic body 5 Connection conductor 5c Connection point 6 Connection member 7 Press member 8 Fixing member 9 Matching substrate 10 Power supply member 10a, 10c Through conductor 10b Wiring pattern 11 Power supply line 12 Thermally conductive elastic body 13 Heat sink (heat dissipation member)
14 Suspension

Claims (13)

An EL light source body comprising an EL substrate having an element substrate and a sealing substrate disposed to face the element substrate, and a translucent support substrate on which the element substrate is placed,
Two element electrodes of different polarities respectively led out along the side of the sealing substrate and disposed on the element substrate;
A conductive elastic body disposed along the element electrode and connected to the element electrode;
A connecting conductor disposed along the conductive elastic body and connected to the conductive elastic body;
An EL light source body comprising: a pressing member that presses the conductive elastic body and the connecting conductor toward the element electrode to conduct the connecting conductor and the element electrode.   The EL light source body according to claim 1, further comprising a connection member that is connected to the connecting conductor and supplies electric power.   The EL light source body according to claim 2, wherein the connection member is engaged with the pressing member.   The EL light source body according to any one of claims 1 to 3, wherein the pressing member is arranged in a frame shape on the outer periphery of the sealing substrate so as to correspond to the element substrate.   5. The pressing member according to claim 1, wherein the pressing member is engaged with an alignment substrate disposed opposite to the translucent support substrate on an outer periphery of the EL light emitting element. The EL light source described in 1.   The EL light source body according to claim 5, wherein a power supply member connected to the connection member and supplying the power is engaged with the matching substrate.   The EL light source body according to claim 6, wherein a part of the power supply member is sandwiched between the translucent support substrate and the alignment substrate.   The EL light source body according to claim 1, wherein the conductive elastic body and the connecting conductor are plate-shaped.   8. The EL light source body according to claim 1, wherein the conductive elastic body has a cylindrical shape, and the connecting conductor is disposed in a cylindrical core portion. 9.   10. The EL light source body according to claim 1, wherein a buffer member is provided between the translucent support substrate and the element substrate.   The EL light source body according to claim 1, wherein a heat radiating member is provided on the sealing substrate.   The EL light source body according to any one of claims 1 to 11, wherein the EL light emitting element is an organic EL light emitting element.   13. An EL light source device, wherein a plurality of the EL light source bodies according to claim 1 are arranged on the translucent support substrate.

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