JP2011249541A - Light emitting panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an unprecedented light emitting panel which is used in various ways.SOLUTION: The light emitting panel includes a light transmitting and emitting region which emits and transmits light. The light transmitting and emitting region includes a light emission portion emitting the light and a light transmitting portion transmitting the light. The light emission portion has a light emitting portion which emits the light and a light shielding layer shielding the light. The light traveling from the light emitting portion toward a first main surface of the light emitting panel is emitted from the first main surface. The light traveling from the light emitting portion toward a second main surface of the light emitting panel is shield by the light shield layer.

Description

  The present invention relates to a light emitting panel.

  A light-emitting panel can be used as a light source for an illumination device, a display device, or the like instead of a light bulb, a fluorescent light, a light bulb-type LED (Light Emitting Diode), or the like. An example of a light-emitting panel is one using an EL (electro-luminescence) element. Patent Document 1 discloses an organic EL element in which an organic light emitting layer made of organic EL is sandwiched between a glass substrate and a transparent protective layer. Light emitted from the organic light emitting layer is emitted to both sides of the organic EL element.

JP 2001-332392 A

  We provide a light-emitting panel that can be used in various ways that has never been seen before.

  According to one aspect of the present invention, there is provided a light-emitting panel including a transmissive light-emitting region that emits light and transmits light, wherein the transmissive light-emitting region includes a light emitting unit that emits light and a light transmissive that transmits light. The light emitting portion includes a light emitting portion that emits light and a light shielding layer that blocks light, and travels from the light emitting portion toward the first main surface of the light emitting panel. Light is emitted from the first main surface, and light directed from the light emitting portion toward the second main surface of the light emitting panel is shielded by the light shielding layer. .

  A light-emitting panel that can be used in various ways is provided.

FIG. 1A is a conceptual diagram illustrating a planar configuration of a light emitting panel according to an embodiment of the invention. FIG. 1B is a schematic diagram showing an example of the AA line cross section of the light emitting panel 100, and FIG. 1C is another example of the AA line cross section of the light emitting panel 100. It is a schematic diagram to represent. 2 is a schematic view illustrating the structure of a transmissive light emitting region 10. FIG. 4 is a cross-sectional view illustrating a specific example of a structure for feeding power to a light emitting unit 34. FIG. FIG. 5 is a schematic diagram illustrating another specific example of the structure of the transmissive light emitting region 10. 4 is a cross-sectional view illustrating a specific example of a structure for feeding power to a light emitting unit 34. FIG. It is a schematic diagram which illustrates the usage condition of the light emission panel of this embodiment. It is a schematic diagram which illustrates the other usage condition of the light emission panel of this embodiment. It is a schematic diagram which illustrates the other usage condition of the light emission panel 100 of this embodiment. It is a conceptual diagram for demonstrating an optical filter effect | action. It is a plane perspective view of the light emission panel 100 which this inventor made as an experiment. FIG. 11A is a cross-sectional view taken along line AA of the light emitting panel 100, and FIG. 11B is a cross-sectional view taken along line BB. It is the photograph which looked at the light emission panel 100 made as an experiment from the main surface 100A side. It is a photograph showing the lighting state of the light emitting panel 100 made as a prototype. It is a schematic plan view which illustrates the pattern of the light transmission part or light emission part in a transmission light emission area | region.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1A is a conceptual diagram illustrating a planar configuration of a light emitting panel according to an embodiment of the invention. FIG. 1B is a schematic diagram showing an example of the AA line cross section of the light emitting panel 100, and FIG. 1C is another example of the AA line cross section of the light emitting panel 100. It is a schematic diagram to represent. 1B and 1C, the detailed structure of the cross section of the light emitting panel 100 is omitted for convenience.

The light emitting panel 100 illustrated in FIG. 1 includes a transmissive light emitting region 10 and a peripheral region 20 provided around the light emitting region 10. As will be described later in detail, the transmissive light emitting region 10 emits light and allows light to pass through between the main surface 100A and the main surface 100B.
As illustrated in FIG. 1B, the light emitting panel 100 may have a planar plate shape on each of the main surfaces 100 </ b> A and 100 </ b> B on both sides.
Alternatively, the main surfaces 100A and 100B may be non-planar. For example, as illustrated in FIG. 1C, one of the main surfaces 100A and 100B may be curved. Alternatively, both of the main surfaces 100A and 100B may be curved surfaces. The curved surface may be a convex curved surface as shown in FIG. 1C, or may be a concave curved surface.
Furthermore, one or both of the main surfaces 100A and 100B may be uneven.

  In the present embodiment, the transmissive light emitting region 10 emits light from only one of the main surface 100A and the main surface 100B. For example, as illustrated by arrows L1 in FIGS. 1B and 1C, light is emitted from the main surface 100A side, but light is not substantially emitted from the main surface 100B side. Alternatively, conversely, light may be emitted from the main surface 100B without substantially emitting light from the main surface 100A.

  Furthermore, a part of the transmissive light emitting region 10 transmits light. For example, as shown by arrows L3 in FIGS. 1B and 1C, light can be transmitted from the main surface 100A side to the main surface 100B side, and as shown by the arrow L4, Light can be transmitted from the surface 100B side to the main surface 100A side.

  On the other hand, the peripheral region 20 is a region where, for example, electrode pads, drive circuits, and other various peripheral circuits and peripheral devices are appropriately provided. In the present embodiment, the peripheral region 20 is not necessarily essential and may be omitted as appropriate.

  Although FIG. 1A illustrates a substantially square shape as the planar shape of the light emitting panel 100, the present embodiment is not limited to this. That is, the planar shape of the light emitting panel 100 can be a polygon, a circle, an ellipse, or various other shapes. Further, the planar shape of the transmissive light emitting region 10 is not limited to a substantially rectangular shape as illustrated in FIG. 1A, and may be a polygon, a circle, an ellipse, or various other shapes. .

FIG. 2 is a schematic view illustrating the structure of the transmissive light emitting region 10. 2A is a partially enlarged plan view of the transmissive light emitting region 10, and FIG. 2B is a cross-sectional view taken along line AA.
The transmissive light emitting region 10 includes a light transmissive portion 12 and a light emitting portion 14. The transmissive light emitting region 10 has portions where the light transmissive portions 12 and the light emitting portions 14 are alternately provided. In the case of the specific example shown in FIG. 2, for example, when the portion on the line AA is seen, the light transmitting portions 12 and the light emitting portions 14 are alternately provided.

The transmissive light emitting region 10 includes a plurality of light transmissive portions 12 scattered in the light emitting portion 14. More specifically, when viewed from a direction perpendicular to the main surface 100A (or main surface 100B), a plurality of light transmitting portions 12 are provided in a substantially matrix shape in the light emitting portion.
As illustrated in FIG. 2B, the light emitting unit 14 includes a light shielding layer 32 that is selectively provided on the translucent substrate 30 and a light emitting unit 34 that is provided thereon. However, the order of lamination of the translucent substrate 30, the light shielding layer 32, and the light emitting unit 34 is not limited to the specific example of FIG. 2 and is arbitrary. As will be described later in detail, the light emitting unit 34 includes, for example, an EL layer, an LED (light emitting diode), an LD (laser diode), and the like.

FIG. 3 is a cross-sectional view illustrating a specific example of a power feeding structure to the light emitting unit 34.
In this specific example, a light shielding layer 32 and a light emitting unit 34 are selectively provided on a light transmitting substrate 30. The light emitting unit 34 is commonly connected by the transparent conductive layer 36, and the light transmitting substrate 38 is provided thereon.
The translucent substrates 30 and 38 can be formed of various materials such as glass, quartz, plastic, and resins. The light-transmitting substrates 30 and 38 need not have zero light transmittance, and may be colorless and transparent, colored and transparent, translucent, or opaque.
The light shielding layer 32 is made of a material that substantially shields light emitted from the light emitting portion 34 and can be formed of, for example, a metal, an organic material, an inorganic material, or the like. If the light shielding layer 32 is formed of a conductive material, it can also serve as a power feeding path for the light emitting section 34.
The transparent conductive layer 36 can be formed by, for example, tin oxide, indium and tin oxide, or the like.
In addition, when the light emitting part 34 has translucency, the light emitting part 34 is not selectively formed only in the light emitting part 14 as illustrated in FIGS. The light emitting unit 34 may be formed continuously.

According to the specific example shown in FIG. 3, power can be supplied to the plurality of light emitting units 34 via the light shielding layer 32 and the transparent conductive layer 36 to emit light.
As shown in FIGS. 2 and 3, light traveling from the light emitting unit 34 toward the main surface 100A of the light emitting panel is emitted from the main surface 100A. On the other hand, light traveling from the light emitting unit 34 toward the main surface 100 </ b> B side of the light emitting panel is shielded by the light shielding layer 32.
That is, the light emitted from the light emitting unit 34 is emitted from the main surface 100A side of the transmissive light emitting region 10 as represented by the arrow L1. Since the light shielding layer 32 is provided, the light from the light emitting part 34 is not emitted in the direction of the arrow L2.

  On the other hand, in the light transmission part 12, the light shielding layer 32 is not provided. For this reason, light can be transmitted through the light-transmitting substrates 30 and 38 in the direction of the arrow L3 or, conversely, in the direction of the arrow L4.

FIG. 4 is a schematic diagram illustrating another specific example of the structure of the transmissive light emitting region 10. 4A is a partially enlarged plan view of the transmissive light emitting region 10, and FIG. 4B is a cross-sectional view taken along the line AA.
Also in this specific example, the transmissive light emitting region 10 has portions where the light transmissive portions 12 and the light emitting portions 14 are alternately provided. For example, when viewing the portion on the AA line, the light transmitting portions 12 and the light emitting portions 14 are provided alternately.
More specifically, the transmissive light emitting region 10 has a plurality of light emitting portions 14 scattered in the light transmitting portion 12. More specifically, a plurality of light emitting portions 14 are provided in a substantially matrix shape in the light transmitting portion 12. The details of these elements can be similar to those described above with respect to FIGS.

FIG. 5 is a cross-sectional view illustrating a specific example of a power feeding structure to the light emitting unit 34.
In this specific example, a transparent conductive layer 31 is provided on a translucent substrate 30, and a light shielding layer 32 and a light emitting unit 34 are selectively provided thereon. A transparent conductive layer 36 is commonly provided on the light emitting unit 34. The light emitting unit 34 is commonly connected by the transparent conductive layer 36, and the light transmitting substrate 38 is provided thereon. If the light shielding layer 32 is formed of a conductive material, it is possible to supply light to the plurality of light emitting portions 34 via the transparent conductive layers 31 and 36 to generate light emission. Also in this specific example, when the light emitting portion 34 has translucency, the light emitting portion 34 is not selectively formed only on the light emitting portion 14 as illustrated in FIGS. 4 and 5. The light emitting part 34 may also be formed continuously in the light transmitting part 12.

  Also in this specific example, the light emitted from the light emitting unit 34 is emitted from the main surface 100A side of the transmissive light emitting region 10 as represented by the arrow L1. Since the light shielding layer 32 is provided, the light from the light emitting part 34 is not emitted in the direction of the arrow L2. On the other hand, in the light transmission part 12, the light shielding layer 32 is not provided. For this reason, light can be transmitted through the light-transmitting substrates 30 and 38 in the direction of the arrow L3 or, conversely, in the direction of the arrow L4.

In addition, this embodiment is not limited to the specific example represented to FIGS. For example, as shown in FIG. 2A (or FIG. 4A), the planar shape of the light emitting portion 14 (or the light transmitting portion 12) is not limited to a substantially square shape, and other various types. It can be made into the shape. Further, the arrangement pattern of the light emitting portions 14 (or the light transmitting portions 12) is not limited to a matrix shape having an equal pitch in the vertical and horizontal directions, and may be a houndstooth check pattern or various non-periodic arrangement patterns. May be. For example, as will be described in detail later as a specific example, the light transmitting portion 12 and the light emitting portion 14 may be formed in a stripe shape and alternately arranged.
Further, the planar shape and planar size of the plurality of light emitting portions 14 (or light transmitting portions 12) are not necessarily the same, and may include light emitting portions 14 having different planar shapes and planar sizes.

  Further, the ratio of the area of the light transmitting portion 12 and the light emitting portion 14 is not limited to that illustrated in FIGS. If the area ratio of the light transmission part 12 is increased, the amount of light transmitted through the light emitting panel 100 can be increased. On the contrary, if the ratio of the area of the light emitting portion 14 is increased, the amount of light emitted from the light emitting panel 100 can be increased. Therefore, the ratio of these areas can be appropriately adjusted according to the use of the light-emitting panel 100, required specifications, performance, and the like.

  As described above, the light emitting panel 100 of the present embodiment emits light only from the one main surface 100A (or 100B) side, and emits light between the one main surface 100A and the other main surface 100B. Can be transmitted. Thus, when a light-emitting panel that transmits light and emits light only in one direction is used, for example, it can be used as a window that can take in external light and can turn on illumination as necessary.

FIG. 6 is a schematic view illustrating the usage mode of the light-emitting panel of this embodiment.
In this specific example, the light emitting panel 100 of this embodiment is attached to the roof 410 of the building 400. As shown in FIG. 6A, the outside light 900 can be transmitted through the light emitting panel 100 into the building 400 during the daytime. That is, the light emitting panel 100 functions as a “lighting window”.
On the other hand, as illustrated in FIG. 6B, at night, the light emitting panel 100 can emit light to be used as “illumination”. At this time, light from the light emitting panel 100 is emitted toward the inside of the building 400, but is not emitted toward the outside of the building 400. That is, light leakage to the outside of the building 400 can be prevented. If the light-shielding layer 32 (see FIGS. 2 and 4) of the light emitting unit 14 is given a reflecting action, the light emitted from the light-emitting unit 34 is reflected by the light-shielding layer 32 and emitted toward the interior of the building 400. Can do. That is, the light emitted from the light emitting unit 14 can be efficiently extracted in only one direction, and the interior of the building 400 can be illuminated.

  6 shows a specific example in which the light-emitting panel 100 is installed on the roof 410 of the building 400, but other than this, for example, the light-emitting panel 100 may be installed on an outer wall of the building 400 or a wall partitioning the room. . In addition, for example, the light emitting panel 100 can be attached to an automobile, a ship, or the like, so that both taking in external light and indoor lighting can be achieved.

FIG. 7 is a schematic view illustrating another usage mode of the light-emitting panel of this embodiment.
In this specific example, the light-emitting panel 100 can be used as a reading lamp. That is, the reader 920 can read the book 910 via the light emitting panel 100. At this time, for example, as illustrated as an inset in FIG. 7, by increasing the area ratio of the light transmitting section 12 and decreasing the area ratio of the light emitting section 14, the light emitting section 14 is disturbed. Can be prevented. Actually, in the state where the reader's 920 is focused on the book 910, the light emitting portion 14 of the light-emitting panel 100 is out of the focus of the reader's 920's eyes. There are few.

When the ambient brightness is not sufficient, the light emitting panel 100 is turned on, and light can be emitted as indicated by the arrow L1 to illuminate the book 910. At this time, since the light from the light emitting panel 100 is not emitted in the direction of the reader 920, the reader 920 does not feel dazzling.
According to this example, it is possible to provide a reading light that is thin, lightweight, and has excellent design and ease of use. Further, for example, as illustrated in FIG. 1C, if the light emitting panel 100 is formed in a lens shape, an enlarged display of the book 910 can be performed.
This specific example is not limited to a reading light, and can be used for, for example, a working light when working while illuminating a hand in a dark place, an enlarged loupe used for repairing a watch, and the like.

On the other hand, the light emitting panel 100 of the present embodiment also has an optical filter function.
FIG. 8 is a schematic view illustrating another usage mode of the light emitting panel 100 of this embodiment.
When the light-emitting panel 100 is in a non-lighting state, the observer 930 can see the object to be observed 940 through the light-emitting panel 100 as shown in FIG. That is, the light image of the observation object 940 can be captured through the light transmission part 12 (see FIGS. 2 and 4) of the light-emitting panel 100.
However, as shown in FIG. 8B, when the light emitting panel 100 is turned on and light is emitted in the direction of the observer 930, the observer 930 becomes difficult to see the observed object 940.

FIG. 9 is a conceptual diagram for explaining such an optical filter action.
This specific example is a light emitting panel 100 in which the light transmitting portions 12 and the light emitting portions 14 are formed in stripes and arranged alternately. That is, in FIG. 9, along the horizontal direction, the transmissive light emitting region 10 has portions where the light transmissive portions 12 and the light emitting portions 14 are alternately provided.

When the light emitting panel 100 is not lit, as shown in FIG. 9A, the observed object 940 can be seen through the light transmitting portion 12. Further, it is possible to see the observer 930 (see FIG. 8) as seen from the observed object 940.
FIG. 9B illustrates a state in which the light emitting panel 100 is turned on and light is emitted from the light emitting unit 14 toward the viewer (the side toward the front in FIG. 9). In this state, the light emitted from the light emitting portion 14 makes it difficult to see the background through the surrounding light transmitting portion 12. That is, the background of the light transmission part 12 is visually hidden by the light emission part 14 becoming bright.
On the other hand, even in this state, the observer 930 (see FIG. 8) can be seen from the observed object 940.

  FIG. 9C shows a state in which the amount of light emitted from the light emitting unit 14 is further increased. When the light emitting part 14 shines brighter, the background of the light transmitting part 12 is completely hidden and cannot be seen. That is, the observed object 940 becomes invisible as viewed from the observer 930 (see FIG. 8).

  Even in this state, the observer 930 can be seen from the observed object 940. This is, for example, the same operation as the reading lamp described above with reference to FIG.

  Thus, according to this example, when the light emitting panel 100 is in a non-lighting state, the opposite sides can be seen from both sides of the light emitting panel 100. On the other hand, when the light-emitting panel 100 is in a lighting state, the other side cannot be seen (or becomes difficult to see) from one side of the light-emitting panel 100, and one side can be seen from the other side of the light-emitting panel 100. it can.

  Such a unique optical filter action may cause new usages and effects in a wide range of applications such as housing equipment, restaurant windows, shop show windows, displays, amusements, games, etc. .

Next, a prototype example of the light emitting panel 100 of the present embodiment implemented by the present inventor will be described.
FIG. 10 is a perspective plan view of the light-emitting panel 100 prototyped by the inventors.
Moreover, Fig.11 (a) is an AA sectional view taken on the line of this light emission panel 100, and FIG.11 (b) is a BB sectional drawing.
In the light-emitting panel 100 of this prototype, a transparent conductive layer 36, an EL layer 34 as a light-emitting portion, and an electrode 32 as a light-shielding layer are stacked on a light-transmitting substrate 38, and a moisture-impermeable protective cap 42 is further formed. It has the structure sealed by. The transparent conductive layer 36 and the electrode 32 are electrically insulated by the insulating layer 40. In the planar configuration shown in FIG. 10, a substantially square portion surrounded by the insulating layer 40 corresponds to the transmissive light emitting region 10, and an outer region corresponds to the peripheral region 20 (see FIG. 1). In the transmissive light emitting region 10, the electrodes 32 as a light shielding layer are formed in a stripe shape and are provided at intervals. The portion where the electrodes 32 are provided is the light emitting portion 14, and the portion where the electrodes 32 are not provided is the light transmitting portion 12.

Hereinafter, the light emitting panel 100 of this prototype will be described in more detail with reference to the manufacturing method thereof.
A soda-lime glass substrate (vertical and horizontal 100 mm × 100 mm, thickness = 0.7 mm) was used as the non-moisture transmissive substrate 38. On the surface, as the transparent conductive layer 36, ITO (Indium Tin Oxide) was formed to a thickness of 150 nm by sputtering. Subsequently, the formed ITO film was patterned by photolithography so as to cover the entire transmissive light emitting region 10 and extend to a part of the peripheral region 20.

  Next, a polyimide film having a thickness of 1.5 μm was formed as the insulating layer 40 by using a spin coating method. Then, the formed polyimide film was patterned by a photolithography method and processed into a shape surrounding the outer edge portion of the transmissive light emitting region 10.

  Next, as the light emitting portion 34, an organic EL laminated body that emits two-wavelength white light was formed on the ITO film 36 using a vacuum deposition method. As the organic EL laminate, first, α-NPD was deposited to a thickness of 60 nm as a hole transport layer. Subsequently, a blue light-emitting layer was formed to a thickness of 20 nm so that the host was α-NPD, the dopant was perylene, and the dopant concentration was 1 wt%. Next, as a red light emitting layer, the host was Alq3, the dopant was DCM1, and a film having a thickness of 40 nm was formed so that the dopant concentration was 1 wt%. Finally, Alq3 was deposited to a thickness of 20 nm as an electron transport layer.

  Next, as the light shielding layer 32, a reflective film was formed on the organic EL laminated body 34 by using a vacuum deposition method. Here, in order to determine the transmittance of the transmissive light emitting region 10, for example, in the case of creating a light emitting panel in which the area ratio of the light transmitting portion 12 is 85%, the total area of the masks is the total area of the window portions of the vapor deposition mask. The light shielding layer 32 was formed using vapor deposition masks arranged at regular intervals and periodically so as to be 15%. As the light shielding layer 32, LiF was formed to a thickness of 0.7 nm and Al was formed to a thickness of 150 nm.

  The organic EL element produced in this way is very fragile with respect to moisture in the outside air. For this reason, the light-emitting portion 34 is hermetically sealed with a moisture-impermeable protective cap 42. In the present embodiment, since the light transmitting portion 12 needs to have light transmittance, the non-moisture permeable protective cap 42 also needs to have light transmittance. Therefore, a soda lime glass substrate was used as the moisture-impermeable protective cap 42. As a method of hermetic sealing, a UV curable adhesive is applied to the edge of a soda lime glass substrate, a protective cap 42 is bonded so as to cover the transmissive light emitting region 10, and then the light emitting portion 34 is irradiated with UV. In an unshielded state, the adhesive application part was irradiated with UV to cure the adhesive and airtightly bonded.

FIG. 12 is a photograph of the prototype light emitting panel 100 as viewed from the main surface 100A side.
FIG. 12A shows a non-lighting state. The light emitting panel 100 is supported by a clip 950 and is supplied with power by terminals 960 and 960. An illustration 980 imitating the face of a lion is arranged behind the light emitting panel 100. It can be seen that the illustration 980 behind the light emitting panel 100 can be observed through the light transmitting portion 12 of the transmissive light emitting region 10 in a state where the light emitting portion 34 does not emit light. The light emitting panel 100 has a light transmittance of 70% in the transmissive light emitting region 10. That is, the area ratio of the light transmission part 12 in the transmissive light emitting region 10 is 70%, and the area ratio of the light emission part 14 is 30%.

  FIG. 12B shows a lighting state. That is, FIG. 12B shows a state in which light from the light emitting unit 14 is emitted toward the front side of the sheet. In this state, the illustration 980 (see FIG. 12A) behind the light emitting panel 100 is hardly visible. That is, the contrast of the illustration 980 behind the light emitting panel 100 is very low.

  In this way, when light is emitted to the viewer side, the contrast of the background image via the light emitting panel 100 is significantly reduced. If the light amount of the light emitting panel 100 is increased, the image behind the light emitting panel 100 can be hidden from the observer as shown in FIG. According to this embodiment, usage like an optical shutter is possible in this way.

FIG. 13 is a photograph showing the lighting state of the prototype light emitting panel 100.
FIG. 13A shows a state in which the main surface 100B of the light-emitting panel 100 is arranged upward on the illustration 980 imitating the face of a lion and is lit. That is, the light from the light emitting panel 100 is emitted toward the direction of the illustration 980 (the back direction of the paper surface), not the direction of the observer (the front side of the paper surface).
In this state, the background image behind the light emitting panel 100 is brightly illuminated, and the background image can be clearly observed. Compared to FIG. 12 (a), it can be seen that the illustration 980 can be illuminated so that it can be observed very clearly. This is similar to the reading lamp described above with respect to FIG.

Similarly, FIG. 13B shows a state in which the main surface 100B of the light emitting panel 100 is arranged upward on the illustration 980 so that the light is turned on, and the illustration 980 is viewed from the side without the light emitting panel 100 being interposed. . That is, the light from the light emitting panel 100 is emitted toward the direction of the illustration 980 (back direction of the paper surface).
Even in this state, the illustration 980 is brightly illuminated and can be clearly observed. This is, for example, the same usage as a lighting fixture called “desk light”, “table light”, or “stand”. According to this embodiment, the usage as such a conventional lighting fixture is also possible.

  As described above, in the state where the light emitting panel 100 is turned on, the background image is hidden when viewed from the light emitting side, whereas the background image is displayed when viewed from the light shielding side. It becomes possible to observe clearly.

  The light emitting panel of this embodiment having such a unique directionality or filter property enables creation of new usages and effects in various unprecedented applications.

  The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to these embodiments. The transmissive light emitting region, the light transmissive portion, the light emitting portion, the peripheral region, the translucent substrate, the transparent conductive layer, the light shielding layer, the electrode, the light emitting portion, the EL laminate, the transparent conductive layer, etc. constituting the light emitting panel of the present invention Even if those skilled in the art have made various design changes regarding the material, shape, size, arrangement, etc. of each element, they are included in the scope of the present invention without departing from the gist of the present invention.

For example, the light transmitting portion or the light emitting portion in the transmissive light emitting region is not necessarily divided into a plurality, and may be a pattern in which a plurality of portions are connected to each other.
FIG. 14 is a schematic plan view illustrating such a pattern.
In the transmissive light emitting region 10, the light transmissive portion 12 has a plurality of stripe-shaped portions 12S. However, the plurality of striped portions 12S are not divided from each other and are connected to each other by the connecting portion 12C. Even if the light transmission part 12 is formed in such a pattern, the effects described above with reference to FIGS. 1 to 13 can be similarly obtained. Further, in the specific example illustrated in FIG. 14, the light transmitting portion 12 and the light emitting portion 14 may be reversed. That is, you may form so that the light emission part 14 may have a pattern like the light transmissive part 12 represented to FIG.

On the other hand, as illustrated in FIG. 4, when a plurality of light emitting portions 12 are scattered in the light transmitting portion 14, each light emitting portion 12 may be individually turned on. This can be realized by using a switching element such as a TFT (Thin Film Transistor). In this way, only a part of the transmissive light emitting area 10 can be turned on, and characters, figures, image data, etc. can be displayed.
Still further, for example, a light emitting section 12 that emits red (R), a light emitting section 12 that emits green (G), and a light emitting section 12 that emits blue (B) are arranged adjacent to each other. These pixels can be periodically arranged in the transmissive light emitting region 10. In this case, color display is also possible by controlling the emission intensity of red, green and blue of each pixel.

 DESCRIPTION OF SYMBOLS 10 Transmission light emission area | region, 12 Light transmission part, 14 Light emission part, 20 Peripheral area | region, 30 Translucent board | substrate, 31 Transparent conductive layer, 32 Light shielding layer (electrode), 34 Light emission part (EL laminated body), 36 Transparent conductive layer , 38 translucent substrate, 40 insulating layer, 42 protective cap, 100 light emitting panel, 100A main surface, 100B main surface, 400 building, 410 roof, 900 outside light, 910 book, 920 reader, 930 observer, 940 body

Claims (6)

A light-emitting panel having a transmissive light-emitting region that emits light and transmits light,
The transmissive light emitting region has a light emitting part that emits light and a light transmissive part that transmits light,
The light emitting portion includes a light emitting portion that emits light and a light shielding layer that blocks light,
The light traveling from the light emitting unit toward the first main surface of the light emitting panel is emitted from the first main surface, and the light traveling from the light emitting unit toward the second main surface of the light emitting panel is A light-emitting panel which is shielded by a light-shielding layer.   The light-emitting panel according to claim 1, wherein the transmissive light-emitting region has a portion in which the light emitting portion and the light transmissive portion are alternately provided.   The light-emitting panel according to claim 1, wherein the light-shielding layer has reflectivity with respect to light emitted from the light-emitting portion.   The light-emitting panel according to claim 1, wherein the transmissive light-emitting region includes a plurality of the light transmissive portions provided in the light emitting portion.   The light-emitting panel according to any one of claims 1 to 3, wherein the transmissive light-emitting region includes a plurality of the light emitting portions provided in the light transmissive portion.   The light emitting panel according to claim 1, wherein the light emitting unit includes an EL laminate.