JP2007206222A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device which is equipped with a circularly polarizing plate on a front surface side of a luminescent display element and in which the luminescent display element and its periphery have a sense of unity while the reflection due to external light is suppressed and the circularly polarizing plate is hardly peelable from an adherend. <P>SOLUTION: The display device is equipped with the electroluminescence display element 1, a translucent member 2 (the adherend) disposed on the front surface side of the electroluminescence display element 1, the circularly polarizing plate 3 disposed on the front surface side of the translucent member 2 and has a tacky adhesive layer 18 on the translucent member 2 side, and a light shielding layer 20 disposed at the translucent member 2 and covering the region other than the display region S of the electroluminescence display element 1, in which the circularly polarizing plate 3 is stuck via an adhesion reinforcing layer 21 to the translucent member 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a display device provided with a self-luminous display element such as an electroluminescent display element.

  As a display device including an electroluminescent display element, for example, there are Patent Document 1 and Patent Document 2 below. In the display device described in Patent Document 1, as shown in FIG. 1 of Patent Document 1, for example, a back electrode 29 constituting the electroluminescent display element 20 is provided on almost the entire surface of the glass substrate 25, thereby Even when external light such as light is radiated, substantially the entire range of the electroluminescent display element 20 appears to have a substantially uniform color tone, and there is no possibility of deteriorating appearance.

In addition, the display element described in Patent Document 2, as shown in FIG. 2 of Patent Document 2, for example, has a linearly polarizing plate 11 and birefringence on the transparent substrate 6 surface of the organic EL element 40 (electroluminescent display element). By bonding the circularly polarizing means 49 (circularly polarizing plate) made of the plate 23, it is possible to prevent the reflected light that is incident from the outside and reflected inside the organic EL element 40 from being emitted to the incident side, and This is to improve the contrast ratio with the display image.
JP 2002-132187 A Japanese Patent Laid-Open No. 9-127858

  However, in the display device described in Patent Document 1, only the electroluminescent display element 20 appears to have a substantially uniform color tone over the entire range, but as shown in FIG. Since the display panel 12 having the window portion 21 is disposed on the front side, the end face (cut) of the window portion 21 can be seen, and the light shielding layer 12b provided on the front surface side of the display plate 12 and the electroluminescent display element 20. The color tone is different and there is a sense of incongruity. A similar phenomenon can be seen in FIG.

  Further, the dial 39 shown in FIG. 7 has a transmissive portion 40 instead of a hole (window portion). Therefore, although the end face (cut) generated by providing the hole becomes invisible, the color tone and glossy state of the electroluminescent display element 20 viewed through the transmissive part 40 and the light shielding layer 39b (black) in the vicinity thereof can be seen. Different. 1 is also the same, but the separation (boundary) from the electroluminescent display element 20 is clear, giving the impression that the electroluminescent display element 20 is different (separately displayed).

  In Patent Document 2, the visibility of the organic EL element 40 alone is greatly improved. Such a display element is used for the display device shown in FIG. 7 of Patent Document 1, for example. In this case, there is also extraneous light that is reflected by the transmission part 40 in particular, and the effect as the circular polarization means 49 is reduced. Further, the circularly polarizing means 49 is bonded to the transparent substrate 6 through an adhesive layer. However, the edge of the circularly polarizing means 49 is easily peeled off from the transparent substrate 6 in a high temperature environment (if the transparent substrate is a resin, The circularly polarized light means may be partially lifted or peeled off due to gas release from the gas.

  Also, as shown in FIG. 9, when a printing layer b is provided on the surface of the transparent substrate a, for example, a so-called printing step is formed at the boundary between the portion with the printing layer b and the portion without the printing layer b. Then, when the circularly polarizing plate d with the adhesive layer c is subsequently attached to the front side of the transparent substrate a, air pockets (bubbles e) are formed at locations where there is no printed layer b near the boundary. When such a transparent substrate a with a circularly polarizing plate d is exposed to a high temperature, the bubbles e may expand and the circularly polarizing means may partially float, which adversely affects visibility and appearance quality. there were.

  The present invention has been made in view of the above points, and in a display device having a circularly polarizing plate on the front side of a light emitting display element, the light emitting display element and its periphery have a sense of unity while suppressing reflection by external light. Another object of the present invention is to provide a display device in which a circularly polarizing plate is difficult to peel off from an adherend.

  To achieve the above object, the present invention provides a light emitting display element, a translucent member provided on the front side of the light emitting display element, and a translucent member provided on the front side of the translucent member. A circularly polarizing plate having an adhesive layer; and a light-shielding layer provided on the rear surface side of the circularly polarizing plate or on the light-transmitting member and covering a region other than the display area of the light-emitting display element. It is affixed to the member through an adhesion reinforcing layer.

  In addition, the light emitting display element includes an electroluminescent display element having a translucent substrate, a transparent electrode, a light emitting layer, and a back electrode, and the back electrode is disposed between the circularly polarizing plate and the light shielding layer. A reflective layer having the same color as the color tone or an approximate color is provided.

  The translucent member is made of a material having a substantially isotropic refractive index.

  A display plate provided on the front side of the light-emitting display element; and a circularly polarizing plate provided on the front side of the display plate and having an adhesive layer on the display plate side. Is formed by providing a light-transmitting substrate with a first display region provided with a transmissive display portion and a non-transmissive ground portion, and not providing the display portion and the ground portion corresponding to the light emitting display element. A second display region, and the circularly polarizing plate is attached to the display plate through an adhesion reinforcing layer.

  The light-emitting display element includes an electroluminescent display element having a translucent substrate, a transparent electrode, a light-emitting layer, and a back electrode, and the back electrode is disposed between the circularly polarizing plate and the ground portion. A reflective layer having the same color as the color tone or an approximate color is provided.

  Further, the substrate is made of a material having a substantially isotropic refractive index.

  In a display device having a circularly polarizing plate on the front side of a light emitting display element, the light emitting display element and its periphery have a sense of unity while suppressing reflection by external light, and the circularly polarizing plate is difficult to peel off from the adherend. Can be obtained.

  The present invention will be described based on each embodiment. 1 to 3 show a first embodiment of the present invention. FIG. 1 is a front view of a display device provided with an electroluminescent display element 1, and FIG. 2 is a cross-sectional view thereof (A-A cross section in FIG. 1). FIG. 3 is a cross-sectional view showing details of the electroluminescent display element 1.

  The display device according to this embodiment includes an electroluminescent display element 1, a translucent member 2 provided on the front side of the electroluminescent display element 1, and circularly polarized light provided on the front side of the translucent member 2. A hard plate is mounted with a plate 3, a case member 4 made of synthetic resin that holds the translucent member 2, a drive circuit that is electrically connected to the electroluminescent display element 1 and drives the electroluminescent display element 1. The circuit board 5, the cover 6 that covers the back side of the circuit board 5, and the opening 7 that is disposed on the front side of the periphery of the circularly polarizing plate 3 and defines the visible region of the circularly polarizing plate 3 (translucent member 2). A turning member 8 made of a black synthetic resin and a see-through plate 9 made of a colorless and transparent synthetic resin covering the front side of the circularly polarizing plate 3 are provided. The electroluminescent display element 1 is held by a holder 10 provided on the case member 4.

  The electroluminescent display element 1 has, for example, a letter-shaped display segment, and the display segment is displayed as a display unit by causing the organic layer to emit light. When the display device is provided in a vehicle, for example, the travel distance of the vehicle, the outside temperature, and the like are displayed. FIG. 3 shows a cross section of the electroluminescent display element 1. In the electroluminescent display element 1, a transparent electrode 12 made of ITO, an insulating layer 13, an organic layer 14, and a back electrode 15 made of aluminum or the like are sequentially laminated on the rear surface of a glass substrate 11 which is a light-transmitting substrate. A sealing glass 16 is disposed behind the back electrode 15. The sealing glass 16 is fixed to the glass substrate 11 with an adhesive 17. The organic layer 14 emits light by applying a voltage to the transparent electrode 12 and the back electrode 15.

  The organic layer 14 may have at least a light emitting layer, but may have a hole injection layer, a hole transport layer, and an electron transport layer. Further, the back electrode 15 may be formed at least at a position corresponding to the display segment, whereas the glass substrate 11, the transparent electrode 12, the insulating layer 13 and the organic layer 14 are substantially transparent, whereas the back electrode 15 Since it is made of a metal such as aluminum and looks almost like a mirror surface, the back electrode 15 is formed not in a part of the glass substrate 11 but in almost the entire range, and the entire surface of the electroluminescent display element 1 appears substantially uniform. It is like that.

  The circularly polarizing plate 3 is a laminate of a linearly polarizing plate and a birefringent plate as described in Patent Document 2 described above, and light incident from the birefringent plate side passes through the linearly polarizing plate, but is linear. It is possible to suppress the light incident from the polarizing plate side, passing through the birefringent plate, and reflected on the birefringent plate side from returning to the incident side (reflected light is suppressed). A translucent adhesive layer 18 such as acrylic or silicon is provided on the translucent member 2 side (birefringent plate surface) of the circularly polarizing plate 3.

  The translucent member 2 is made of a material having a substantially isotropic refractive index, such as a colorless and transparent acrylic resin or polycarbonate resin. On the back surface side of the translucent member 2, the reflective layer 19 of silver or gray (in the case where the back electrode 15 is made of aluminum) that is the same color as the color tone of the back electrode 15 or an approximate color (when the back electrode 15 is made of aluminum), and the black light shielding layer 20. Is provided. The reflective layer 19 and the light shielding layer 20 define the display area S of the electroluminescent display element 1 and are provided at two light-transmissive members other than the area to be the display area S. In FIG. 1, a rectangular broken line is a display area S, and the display area S is narrower than the range of the back electrode 15 formed in the electroluminescent display element 1. Although the translucent member 2 is a colorless and transparent material, it may be colored as long as it is light transmissive.

  In addition, an adhesion enhancing layer 21 having translucency is provided on the front surface side (circular polarizing plate 3 side) of the translucent member 2. The adhesion reinforcing layer 21 prevents the gas generated from the translucent member 2 from coming out from the front side, that is, forms a thin film made of, for example, silicon resin having moisture resistance by printing or spin coating. Alternatively, there is a method of forming a thin film containing silicon oxide, aluminum oxide, or the like by a CVD method, a sputtering method, or the like, but a silicon resin with high moisture resistance is preferable. The circularly polarizing plate 3 having the adhesive layer 18 described above is attached to the front surface (on the adhesion reinforcing layer 21) of the translucent member 2. At this time, the circularly polarizing plate 3 is configured such that the birefringent plate is on the electroluminescent display element 1 side.

  In the display device configured as described above, since the circularly polarizing plate 3 is attached to the front side of the translucent member 2 when not displayed, external light is incident on the circularly polarizing plate 3 as described above. Even if the light is reflected in the translucent member 2 and the electroluminescent display element 1, the reflected light is suppressed, so that not only the display area S of the electroluminescent display element 1 but also the opening 7 of the turning member 8. The entire surface (visible region of the display device) is visually recognized as blackish. When a voltage is applied to the electroluminescent display element 1, the organic layer 14 emits light, and a display portion (not shown) is transmissively displayed on a uniform black surface. Further, if the translucent member 2 is a material having high birefringence, the reflected light tends to pass through the circularly polarizing plate 3 and the effect as the circularly polarizing plate 3 tends to be reduced. Since it is made of a material having a rate, reflected light is suppressed by the circularly polarizing plate 3.

  In addition, when strong external light shines in the visible region of the display device or when viewed from an oblique direction, the translucent member 2 or the electroluminescent display element 1 may be faintly visible. That is, although the reflected light is slightly emitted, the back electrode 15 of the electroluminescent display element 1 is formed on substantially the entire surface of the glass substrate 11 and the same color as the color tone of the back electrode 15 on the translucent member 2. Alternatively, since the reflective layer 19 having an approximate color is provided, the entire surface is visually recognized with a uniform color tone even when viewed from an oblique direction. If the visibility is not adversely affected, the reflective layer 19 may not be provided.

  In this way, regardless of the display or non-display time, the boundary between the electroluminescent display element 1 and its periphery (or the difference in level) or the difference in color tone can be eliminated, and a display device with a sense of unity can be obtained. Therefore, a display device with a sense of unity can be achieved without using a large electroluminescent display element corresponding to the visible region of the display device, and cost increase can be suppressed.

  In addition, since the circularly polarizing plate 3 is attached to the translucent member 2 via the adhesion reinforcing layer 21, the gas that is to be released from the translucent member 2 to the circularly polarizing plate 3 side even in a high temperature environment. Is suppressed by the adhesion reinforcing layer 21, and the circularly polarizing plate 3 can be prevented from floating or peeling off from the translucent member 2.

  The light shielding layer 20 also serves to prevent display light (light emission) from the electroluminescent display element 1 from being reflected by the reflective layer 19 and illuminating the surface of the glass substrate 11 of the electroluminescent display element 1. Therefore, the light shielding layer 20 is not limited to black, but a dark color system such as dark ash, dark blue, and dark green is desirable. Further, although the electroluminescent display element 1 is used as the light emitting display element, a self-luminous display element such as a fluorescent display tube, an inorganic EL element, or a light emitting diode display element may be applied.

  FIG. 4 shows a second embodiment of the present invention, and is a partial cross-sectional view showing a state in which a circularly polarizing plate 3 is pasted on a translucent member 2. In the present embodiment, the light shielding layer 20 and the reflective layer 19 in the first embodiment are provided on the surface side of the translucent member 2, and the other parts are the same as in the first embodiment, and thus the same. Reference numerals are assigned and detailed description is omitted.

  The translucent member 2 is made of, for example, a colorless and transparent acrylic resin or polycarbonate resin made of a material having a substantially isotropic refractive index, and has a black light-shielding layer 20 on the surface side as in the first embodiment. A reflective layer 19 having the same color as the color tone of the back electrode 15 or an approximate color is provided. At that time, the light shielding layer 20 is located closer to the electroluminescent display element 1 than the reflective layer 19. Further, an adhesion reinforcing layer 21 is provided on the front side (circularly polarizing plate 3 side) of the translucent member 2 after the light shielding layer 20 and the reflective layer 19 are provided. And the circularly-polarizing plate 3 is affixed on the front surface of the translucent member 2 provided with the adhesion reinforcement layer 21. At this time, the circularly polarizing plate 3 has a birefringent plate on the electroluminescent display element 1 side.

  With this configuration, as in the first embodiment, there is no boundary (or step difference) between the electroluminescent display element 1 and its periphery, a difference in color tone, and the like, and a display device with a sense of unity is obtained. Can do. In addition, since the circularly polarizing plate 3 is attached to the translucent member 2 via the adhesion reinforcing layer 21, the gas that is to be released from the translucent member 2 to the circularly polarizing plate 3 side even in a high temperature environment. Is suppressed by the adhesion reinforcing layer 21, and the circularly polarizing plate 3 can be prevented from floating or peeling off from the translucent member 2.

  Further, even if a so-called printing step is formed by providing the light shielding layer 20 and the reflective layer 19 on the surface of the translucent member 2, when the adhesion reinforcing layer 21 is provided, the adhesion reinforcing layer is changed so that the printing step gradually changes. 21 is formed, and when the circularly polarizing plate 3 with the pressure-sensitive adhesive layer 18 is pasted, air accumulation (bubbles) is unlikely to occur between the adhesion reinforcing layer 21 and the pressure-sensitive adhesive layer 18 (circularly polarizing plate 3). Even if exposed, the bubbles do not expand and the circularly polarizing means does not float.

  5 to 7 show a third embodiment of the present invention. FIG. 5 is a front view of a display device for a vehicle provided with the electroluminescent display element 1, and FIG. 6 is a cross-sectional view thereof (BB cross section in FIG. 5). FIG. 7 is a partial cross-sectional view showing a state where a circularly polarizing plate is attached to the display plate. In addition, the same code | symbol is attached | subjected to the same or equivalent part as the said 1st Embodiment, and the detailed description is abbreviate | omitted.

  The display device in this embodiment includes a speedometer 22 and a tachometer 23. A description of the tachometer 23 is omitted. The speedometer 22 includes an electroluminescent display element 1, a display plate 25 provided on the front side of the electroluminescent display element 1 and provided with a display unit 24 such as a scale, numbers, characters, and the like indicating the speed of the vehicle, and a display unit 24. Are electrically connected to the indicator 26, the indicator main body 27 for rotating the indicator 26, the circularly polarizing plate 3 provided on the front side of the display plate 25, the indicator main body 27 and the electroluminescent display element 1. A hard circuit board 5 on which a drive circuit for driving the display body 27 and the electroluminescent display element 1 is mounted, and light emitting diodes 28 and 28A as light sources for illuminating the pointer 26 and the display board 25 are provided.

  In addition, the case member 4 disposed between the display board 25 and the circuit board 5, the cover 6 covering the back side of the circuit board 5, and the circularly polarizing plate 3 (display) The plate 25 is provided with a turn-back member 8 made of, for example, a black synthetic resin and having an opening 7 for defining a visible region, and a transparent plate 9 made of a colorless and transparent synthetic resin covering the front side of the circularly polarizing plate 3. In addition, since the basic structure of the circularly-polarizing plate 3 provided with the electroluminescent display element 1 and the adhesive layer 18 is the same as that of the first embodiment, description thereof is omitted. Although details will be described later, in FIG. 5, the display unit 24 is not visually recognized unless the light-emitting diode 28 </ b> A for illuminating the display panel is lit.

  The pointer 26 has an instruction unit 29 made of, for example, a colorless and transparent synthetic resin, and a white foil (not shown) is hot stamped on the back surface of the instruction unit 29. For example, when the light emitting diode 28 for pointer illumination that emits red light is turned on, the red light is reflected on the white foil, and the indicator 29 is visually recognized in red.

  The case member 4 is made of a white synthetic resin having a light shielding property, and includes an outer peripheral wall 30, a placement portion 31 on which the display plate 25 is placed, a cylindrical portion 32 surrounding the light emitting diode 28 for pointer illumination, and the holder 10. Etc. The electroluminescent display element 1 is held by a holder 10.

  The display board 25 is formed by not providing the first display region S1 in which the light-transmissive substrate 33 is provided with the transmissive display portion 24 and the non-transmissive ground portion 34, and the display portion 24 and the ground portion 34 are not provided. And a second display area S2. The substrate 33 is made of a material having a substantially isotropic refractive index, such as a colorless and transparent acrylic resin or polycarbonate resin, as in the first embodiment, but may be colored. On the back side of the substrate 33, a dark-colored light shielding layer 20 (black, dark gray, dark blue, dark green, etc.) is provided except for the portion that becomes the display unit 24. The ground portion 34 is formed by providing the light shielding layer 20, and the portion where the light shielding layer 20 is not provided is the transmissive display portion 24.

  Further, the light shielding layer 20 is provided at a location excluding the region corresponding to the electroluminescent display element 1. The region corresponding to the electroluminescent display element 1 is the second display region S2, which is narrower than the range of the back electrode 15 formed in the electroluminescent display element 1. In FIG. 5, the inside of the rectangular broken line is the second display area S2. That is, the second display area S2 in the present invention refers to an area corresponding to the electroluminescent display element 1, and the other area is the first display area S1. Therefore, in the case where a notification display unit (for example, a turn display unit or an engine oil display unit) for displaying the operating state of the vehicle or details of abnormality is provided in the speedometer 22, the light shielding layer 20 is not provided around the notification display unit. Even if there is a transparent portion in a narrow range, it is referred to as the first display region S1 including them.

  In addition, a reflective layer 19 having the same color as the color tone of the back electrode 15 of the electroluminescent display element 1 or an approximate color is provided between the substrate 33 and the light shielding layer 20 (ground portion 34). In addition, the display part 24 should just have transparency. Therefore, a transmissive colored layer may be provided at a location corresponding to the display unit 24, or the reflective layer 19 may be provided if the reflective layer 19 is transmissive. Further, the adhesion reinforcing layer 21 having the same translucency as that of the first embodiment is provided on the front side of the substrate 33, and the circularly polarizing plate 3 having the adhesive layer 18 is stuck on the adhesion enhancing layer 21. is there. At this time, the circularly polarizing plate 3 is configured such that the birefringent plate is on the electroluminescent display element 1 side.

  In the display device configured as described above, only the pointer 26 is visually recognized in the opening 7 of the turn-back member 8, and the circular polarizing plate 3 is provided on the front side of the display plate 25 in other cases. , The entire surface is visually recognized as blackish. For example, when the light emitting diode 28A for illuminating the display panel that emits white light is turned on, the display unit 24 is transmitted and illuminated on a uniformly black surface. In addition, when a voltage is applied to the electroluminescent display element 1, the organic layer 14 emits light, and a display portion (not shown) is transmissively displayed on a uniform black surface.

  Further, even when the speedometer 22 is viewed from an oblique direction, the reflective layer 19 provided on the back surface side of the substrate 33 has the same color as the color tone of the back electrode 15 of the electroluminescent display element 1 or an approximate color. The entire surface is visually recognized with a uniform color tone. Note that the reflective layer 19 is not necessarily provided as long as the visibility is not adversely affected.

  In this way, a display device with a sense of unity can be obtained as in the first embodiment, regardless of whether the display unit 24 or the electroluminescent display element 1 is displayed. In addition, since the circularly polarizing plate 3 is attached to the substrate 33 via the adhesion reinforcing layer 21, gas release that tends to exit from the substrate 33 to the circularly polarizing plate 3 side is caused even in a high temperature environment. The circularly polarizing plate 3 can be prevented from floating or peeling off from the substrate 33 (display plate 25). The light shielding layer 20 and the reflective layer 19 may be provided on the surface side of the substrate 33 as in the second embodiment, and even in this case, the same effect as in the second embodiment can be obtained.

  FIG. 8 is a partial cross-sectional view of a display panel and a circularly polarizing plate showing a fourth embodiment of the present invention. Although not shown, the display device including the electroluminescent display element 1 according to the present embodiment does not include the pointer as described in the third embodiment. Therefore, the display board is not provided with a display portion such as a scale, a number, or a character indicated by the pointer, and in this embodiment, a notification display portion is provided as a display portion. In addition, since the basic structure of the circularly-polarizing plate 3 provided with the electroluminescent display element 1 and the adhesive layer 18 is the same as that in each of the embodiments, description thereof is omitted.

  The display board 25 is formed by not providing the first display area S1 in which the notification display unit 37 and the non-transparent ground part 34 are provided on the light transmissive substrate 33, and the notification display part 37 and the ground part 34. And a second display area S2. The notification display unit 37 is a display unit (for example, a turn display unit or an engine oil display unit) that displays the operating state of the vehicle or the contents of abnormality, and a mark 38 for turns and engine oil is formed by, for example, the black light shielding layer 20. , A transmission part 39 is provided around the mark 38 (light shielding layer 20). Further, the ground portion 34 is formed around the notification display portion 37 by providing the black light shielding layer 20. Alternatively, the mark 38 may be formed of a transmissive colored layer without providing the transmissive portion 39. Moreover, the character display part for the alerting | reporting display part 37 may be added. In this way, the first display region S1 is formed.

  The second display area S2 is an area corresponding to the electroluminescent display element 1, and the notification display part 37 and the ground part 34 (light shielding layer 20) are not provided in this area. The display device configured as described above has a uniformly black surface as long as the electroluminescent display element 1 or the notification display unit 37 is not displayed. And the transmission part 39 of the alerting | reporting display part 37 is permeate | transmitted by lighting of the light source arrange | positioned behind the display board 25 corresponding to each alerting | reporting display part 37. FIG. The electroluminescent display element 1 is also transmissively displayed as in the above embodiments.

  Moreover, the adhesion reinforcing layer 21 having the same translucency as that of each of the above embodiments is provided on the front side of the substrate 33, and the circularly polarizing plate 3 having the adhesive layer 18 is stuck on the adhesion reinforcing layer 21. . At this time, the circularly polarizing plate 3 is configured such that the birefringent plate is on the electroluminescent display element 1 side.

  With this configuration, a display device having a sense of unity can be obtained in the present embodiment as in the above embodiments. Further, since the circularly polarizing plate 3 is attached to the substrate 33 via the adhesion reinforcing layer 21, the circularly polarizing plate 3 is floated or peeled off from the substrate 33 (display plate 25) as in the above embodiments. Can be prevented, and the visibility and appearance quality are not adversely affected.

  In the present embodiment, the reflective layer 19 having the same color or approximate color as the color tone of the back electrode 15 of the electroluminescent display element 1 is not provided on the back side of the substrate 33, but it may be provided. As described above, even when viewed from an oblique direction as described above, the entire surface is visually recognized with a uniform color tone, and the display device is more integrated. Further, the light shielding layer 20 may be provided on the surface side of the substrate 33 as in the second embodiment, and even in that case, the same effect as in the second embodiment can be obtained.

  Further, in each of the above embodiments, the light shielding layer 20 may be provided on the back side of the circularly polarizing plate 3. In addition, the reflective layer 19 and the light shielding layer 20 may be provided on the back surface side of the circularly polarizing plate 3. In this case, the adhesive layer 18 is provided after the light shielding layer 20 or the reflective layer 19 and the light shielding layer 20 are provided. Further, the member to which the circularly polarizing plate 3 is attached is an adherend, and refers to the translucent member 2 in the first and second embodiments, and the display board in the third and fourth embodiments. 25 (substrate 33).

The front view of the display apparatus which shows 1st Embodiment of this invention. Sectional drawing (AA cross section in FIG. 1) of the display apparatus. Sectional drawing of the electroluminescent display element used for the display apparatus. The fragmentary sectional view of the translucent member and circularly-polarizing plate which show 2nd Embodiment of this invention. The front view of the display apparatus which shows 3rd Embodiment of this invention. Sectional drawing of the same display apparatus (BB cross section in FIG. 5). The partial cross section figure of the display board and circularly-polarizing plate used for the display apparatus. The partial cross section figure of the display board which shows 4th Embodiment of this invention, and a circularly-polarizing plate. The fragmentary sectional view of the transparent substrate and circularly-polarizing plate which show a prior art example.

Explanation of symbols

1 Electroluminescent display element (light-emitting display element)
2 Translucent member 3 Circularly polarizing plate 15 Back electrode 18 Adhesive layer 19 Reflective layer 20 Light-shielding layer 21 Adhesion enhancing layer 24 Display unit 25 Display plate 33 Substrate

Claims (6)

  A light-emitting display element, a translucent member provided on the front side of the light-emitting display element, a circularly polarizing plate provided on the front side of the translucent member and having an adhesive layer on the translucent member side, A light-shielding layer provided on the back side of the circularly polarizing plate or on the translucent member and covering the area other than the display area of the light-emitting display element, and the circularly polarizing plate is attached to the translucent member via an adhesion reinforcing layer. A display device.   The light emitting display element comprises an electroluminescent display element having a translucent substrate, a transparent electrode, a light emitting layer, and a back electrode. Between the circularly polarizing plate and the light shielding layer, a color tone of the back electrode is provided. The display device according to claim 1, further comprising a reflective layer of the same color or an approximate color.   The display device according to claim 1, wherein the translucent member is made of a material having a substantially isotropic refractive index.   A light emitting display element; a display plate provided on the front side of the light emitting display element; and a circularly polarizing plate provided on the front side of the display plate and having an adhesive layer on the display plate side. A first display region in which a transmissive display portion and an impermeable ground portion are provided on a transmissive substrate, and a second display region that is formed by not providing the display portion and the ground portion corresponding to the light emitting display element. And the circularly polarizing plate is attached to the display plate through an adhesion reinforcing layer.   The light emitting display element comprises an electroluminescent display element having a translucent substrate, a transparent electrode, a light emitting layer, and a back electrode, and between the circularly polarizing plate and the ground portion, The display device according to claim 4, wherein a reflective layer of the same color or an approximate color is provided.   6. The display device according to claim 4, wherein the substrate is made of a material having a substantially isotropic refractive index.

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