KR20090005967A - Display device and electronic apparatus - Google Patents

Abstract

A display device and an electronic device are provided to enlarge the space of display area without enlarging display element. A display has a display area(A1) and includes an electro-optic layer and a light-reflecting layer reflecting light emitted from the electro-optic layer to the viewing side of the display device, the light-reflecting layer being arranged in the display area. A plate-shaped exterior(40) has a frame area including a portion located outside the periphery of the display. An antireflective plate continuously covers both of the display area and the frame area. The antireflective plate prevents external light, which enters the viewing side of the display device and is reflected by the light-reflecting layer or the frame area, from emerging on the viewing side.

Description

Display Devices & Electronic Devices {DISPLAY DEVICE AND ELECTRONIC APPARATUS}

TECHNICAL FIELD This invention relates to the technique of displaying an image using electro-optical layers, such as a light emitting layer and a liquid crystal layer.

In the display body which reflects the reflected light from the reflection layer formed on the back side of the electro-optical layer to the observation side and uses it for display, external light incident on the display body from the observation side is reflected by the reflection layer and exits to the observation side. There is a problem in that the scenery of is superimposed on the original image (the background is reflected). Japanese Patent Laid-Open No. 8-321381 and Japanese Patent Laid-Open No. 9-127885 disclose a technique of suppressing background reflection by a circularly polarizing plate disposed on an observation side of an electro-optical layer.

(Summary of invention)

Large display is required for the display body. However, in order to realize the enlargement of the display body, it is necessary to solve various problems such as an increase in manufacturing cost, a decrease in yield, and a further increase in driving circuit and increase in power consumption. In view of the above circumstances, one object of this invention is to enlarge the area of an external display area, without making a display large.

MEANS TO SOLVE THE PROBLEM In order to solve the above subject, the display apparatus which concerns on the 1st aspect of this invention is a display apparatus in which the light reflection layer which reflects the emission light from an electro-optical layer to an observation side is formed in a display area, A plate-shaped exterior member having an edge region including a portion located outside, and a plate member which continuously covers both the display region and the edge region, wherein the external light is incident from the observation side and reflected from the light reflection layer or the edge region. It is provided with the antireflection plate which suppresses emission to an observation side. In the above structure, since the antireflection plate is continuous over the display area and the edge area, the boundary between the display body and the exterior body is inconspicuous. Therefore, it is possible to enlarge the area of the apparent display area without increasing the size of the display body. The display device according to the present invention is employed in various electronic devices.

In the specific example of the display apparatus which concerns on a 1st aspect, the optical characteristic in the edge area | region of an exterior body, and the display area of a display body (when all pixels are made into non-lighting etc.) It is substantially coincident with (approximately) the optical characteristic. More specifically, the reflectance (%) when the measurement light is irradiated to the edge region of the exterior body through the antireflection plate, and when the measurement light is irradiated to the display area of the display object through the antireflection plate The maximum value of the difference (e.g., the difference value Δ in FIG. 4) at the same wavelength as the reflectance (%) is 3% or less in the range where the wavelength of the measurement light is 500 nm or more and 600 nm or less. According to this aspect, the boundary between a display body and an exterior body can be made inconspicuous especially.

In the specific example of the display apparatus which concerns on a 1st aspect, the exterior body is a frame-shaped member in which the opening part was formed so that the display area of a display body may be located inside inner periphery. In addition, the display body includes a light shielding layer for shielding the gap of each pixel, and an outer periphery of the light shielding layer is located outside the inner periphery of the exterior body. According to this aspect, since the outer periphery of the light shielding layer is located outside the inner periphery of the exterior body, a gap (for example, the area GB of FIG. 5) is formed between the inner periphery of the exterior body and the outer periphery of the light shielding layer. Compared to the configuration with), it is possible to make the boundary between the display body and the exterior body more inconspicuous.

In the specific example of the display apparatus which concerns on a 1st aspect, the exterior body is bonded to the surface of the viewing side of the display body, and the antireflection plate is bonded to the surface of the viewing side of the exterior body. In this embodiment, since the antireflection plate is separated from the surface on the observation side of the display body, heat transfer from the display body to the antireflection plate is suppressed. Therefore, deterioration of the antireflection plate due to heating is suppressed. However, in the structure in which the antireflection plate is separated from the surface on the observation side of the display body, light reflection occurs on the surface on the observation side of the display body or on the back side surface of the antireflection plate. Thus, the display device according to a particularly suitable embodiment of the first aspect is an AR (Anti Reflection) formed on at least one of an opposing surface of the antireflection plate and an opposing surface of the display element. ) A coat layer is provided. Moreover, the display apparatus which concerns on another form is provided with the transparent filler filled in the space of the clearance gap between the surface of the display side of the display body, and an anti-reflective plate. According to each of the above forms, there exists an advantage that the reflection in the surface on the observation side of a display body, or the surface on the back side of an anti-reflective plate is suppressed.

In the specific example of the display apparatus which concerns on a 1st aspect, the exterior body is a plate-shaped member arrange | positioned at the back side of a display body. According to this embodiment, there is an advantage that the bonding between the exterior body and the display body is facilitated, and the mechanical strength of the display body is reinforced by the exterior body.

In another specific embodiment of the first aspect, a light-shielding property adjusting layer (for example, the characteristics of FIGS. 13 and 14) including a portion located on an outer surface of the anti-reflective plate with a display body on an outer side of the display area. The adjustment layer 80 is formed. According to the above aspect, even if the optical characteristic of the edge area of an exterior body does not correspond with the optical characteristic of the display area of a display body, a display body is made to match an optical characteristic in the display area of a characteristic adjustment layer and a display body. It is possible to make the edge of the edge (the boundary between the display area and the property adjustment layer) inconspicuous. In a more specific aspect, the property adjusting layer includes a first layer formed on the surface on the rear side of the antireflection plate and a second layer formed on the surface of the first layer, and a plurality of openings are formed in the second layer. . According to the above aspect, it is possible to adjust the optical characteristic of a characteristic adjustment layer by selecting suitably the form and distribution (total number and density) of each opening of a 2nd layer. In addition, when one of the 1st layer and the 2nd layer is formed with the film thickness thin enough so that the emission light from a display body may permeate | transmit enough, both of the outer side and inner side of a display area among antireflection plates ( The structure which provided the said layer in the whole area of the opposing surface with the display body in this is also employ | adopted.

According to a second aspect of the present invention, there is provided a display device including a plurality of display bodies each having a light reflection layer reflecting the light emitted from the electro-optical layer toward the observation side, and a portion located outside the periphery of each display body. For example, a plate-shaped exterior body having a border area including a portion A2a in FIG. 8 or a portion A2b in FIG. 9, and the display area and the border area of a plurality of display bodies are successively provided. As a board | plate material to coat | cover, it is provided with the antireflection plate which suppresses the emission to the observation side of the external light which entered from the observation side and reflected in the light reflection layer or the edge area | region of each display body. In the above structure, since the antireflection plate is continuous over the plurality of display regions and the edge regions, the boundary between each display body and the exterior body is inconspicuous. Therefore, it is possible to enlarge the area of the apparent display area without increasing the size of each display body. The display device according to the second aspect is employed in various electronic devices.

In the specific example of the display apparatus which concerns on a 2nd aspect, the some display body is arrange | positioned apart from each other, and the exterior body is the part located in the clearance gap of each display body which adjoins mutually (for example, part A2b of FIG. 9). )). According to the above aspect, the area of an apparent display area can be further enlarged by separating each display body from each other, without making the boundary between each display body adjacent to each other, and the exterior body mutually noticeable.

In the specific example of the display apparatus which concerns on a 2nd aspect, the reflectance (%) at the time of irradiating a measurement light with the anti-reflection plate with respect to the edge area of an exterior body, and an anti-reflection plate with respect to the display area of each display body The maximum value of the difference value (for example, the difference value Δ in FIG. 4) at the same wavelength as the reflectance (%) when irradiated with the measurement light is 3 within the range of 500 nm to 600 nm. % Or less According to this aspect, the boundary between each display body and an exterior body can be made inconspicuous especially.

In the specific example of the display apparatus which concerns on a 2nd aspect, the exterior body is a board | plate material in which the some opening part was formed so that the display area of each display body may be located inside inner periphery. In addition, the display body includes a light shielding layer which is formed so that the outer periphery is positioned outside the inner periphery of the exterior body and shields the gap of each pixel. According to this aspect, since the outer periphery of the light shielding layer is located outside the inner periphery of the exterior body, a gap (for example, the area GB of FIG. 5) is formed between the inner periphery of the exterior body and the outer periphery of the light shielding layer. Compared with the structure with), it is possible to make the boundary between each display body and the exterior body more inconspicuous.

In the specific example of the display apparatus which concerns on a 2nd aspect, the exterior body is bonded to the surface of each observation side of a some display body, and the antireflection plate is bonded to the surface of the observation side of the exterior body. In this embodiment, since the antireflection plate is separated from the surface on the observation side of each display body, transfer of heat from the display body to the antireflection plate is suppressed. Thus, deterioration of the antireflection plate due to heating is suppressed. However, in the structure in which the antireflection plate is separated from the surface on the observation side of the display body, light reflection occurs on the surface on the observation side of each display body or on the surface of the back side of the antireflection plate. Therefore, the display device which concerns on the very suitable specific example of a 2nd aspect is AR coat formed in at least one of the opposing surface with each display body in an antireflection plate, and the opposing surface with the antireflection plate in each display body. With layers. Moreover, the display apparatus which concerns on another form is provided with the transparent filler filled in the space of the clearance gap between the surface of the observation side of each display body, and an anti-reflective plate. According to each form mentioned above, there exists an advantage that the reflection in the surface on the side of the observation side of each display body, or the surface of the back side of an anti-reflective plate is suppressed.

In the specific example of the display apparatus which concerns on a 2nd aspect, the exterior body is a plate-shaped member arrange | positioned at the back side of a some display body. According to this embodiment, there is an advantage in that the bonding between the exterior body and the plurality of display bodies is facilitated, and the mechanical strength of each display body is reinforced by the exterior body.

(The best form to carry out invention)

EMBODIMENT OF THE INVENTION Hereinafter, several embodiment of this invention is described, referring drawings. In addition, in the following description, each element with the same code | symbol is common in function and function except the case where there is no notice.

<A: First Embodiment>

1 is an exploded perspective view showing the configuration of a display device 100A according to a first embodiment of the present invention. 2 is a cross-sectional view of the display device 100A. As shown in FIG. 1 and FIG. 2, the display device 100A is a planar structure in which the display body D, the exterior body 40, and the antireflection plate 60 are stacked. The display body D displays various images by the plurality of pixels P arranged in the surface shape in the display area A1.

As shown in FIG. 2, the display body D includes a first substrate 10 and a second substrate 20 bonded by a light-transmissive adhesive layer 25. The 2nd board | substrate 20 is located in the observation side of the 1st board | substrate 10 (namely, the observer side which visually recognizes the display image by the display body D). On the opposing surface of the first substrate 10 with the second substrate 20, a plurality of light reflection layers 11 corresponding to the pixels P are formed apart from each other. Each light reflection layer 11 is a film body formed of a light reflective material. In addition, the structure in which the light reflection layer 11 continues throughout the display area A1 is also adopted.

On the surface of the first substrate 10, a light-transmissive insulating layer 12 covering each light reflection layer 11 is formed. On the surface of the insulating layer 12, a plurality of first electrodes 14 corresponding to each pixel P are formed apart from each other. Each first electrode 14 is an electrode formed of a transparent conductive material represented by ITO (Indium Tin Oxide). As shown in FIG. 2, the light reflection layer 11 and the first electrode 14 overlap each other when viewed in a direction perpendicular to the first substrate 10.

A partition layer 13 is formed on the surface of the insulating layer 12. The partition layer 13 is an insulating layer of a shape (lattice shape) that divides the space on the surface of the first substrate 10 for each pixel P. As shown in FIG. In the space surrounded by the inner circumferential surface of the partition layer 13 and having the first electrode 14 as the bottom surface, the light emitting layer 15 is formed of an organic EL (Electroluminescence) material. The partition layer 13 and the light emitting layer 15 are covered with the second electrode 16. The second electrode 16 is a light-transmitting conductive film that is continuous over the plurality of pixels P. As shown in FIG. The light emitting layer 15 emits white light of a light amount corresponding to electrical energy applied from the first electrode 14 (anode) and the second electrode 16 (cathode). Various images are displayed by the light emitted from the light emitting layer 15 to the observation side and the reflected light in the light reflection layer 11 passing through the second electrode 16 and exiting to the observation side. Each element on the first substrate 10 is sealed by a light-transmissive seal 17.

The 2nd board | substrate 20 is a light transmissive board | plate material in which the light shielding layer 21 and the some colored layer 22 (22R, 22G, 22B) were formed in the opposing surface with the 1st board | substrate 10. FIG. The light shielding layer 21 is formed in a lattice shape in which a region corresponding to each pixel P (the region overlapping the first electrode 14 or the light reflection layer 11) is opened to shield the gap of each pixel P. do.

3 is a conceptual diagram showing the planar relationship between the elements of the display device 100A. 3, the illustration of the antireflection plate 60 is omitted. As shown in FIG.2 and FIG.3, the dimension of the external shape of the light shielding layer 21 is large compared with display area A1. Therefore, the outer periphery Q1 of the light blocking layer 21 is located outside the display area A1.

Each colored layer 22 in Fig. 2 is a light-transmissive film body colored with any one of a plurality of display colors (red 22R, green 22G, blue 22B), and is used for each opening of the light shielding layer 21. It is formed inside. Therefore, the plurality of colored layers 22 are arranged in a plane shape in the display area A1. After the light emitted from the light emitting layer 15 passes through each of the colored layers 22 and exits to the observation side, the viewer perceives the color image.

As shown in FIG. 1 and FIG. 2, the exterior body 40 is an opaque frame-shaped board material in which the opening part 42 of rectangular shape was formed. The exterior body 40 is bonded by the double-sided tape 30 to the surface on the observation side of the display body D (that is, the surface on the observation side of the second substrate 20). For example, a plate of aluminum painted in black is suitably employed as the exterior body 40.

As shown in FIG. 2 and FIG. 3, the dimension of the outer shape of the exterior body 40 (the dimension of each side of the outer circumferential edge R1) is the dimension of the outer shape of the display body D (the first substrate 10 or the second). Larger than the dimensions of each side of the substrate 20). As for the exterior body 40 and the display body D, the outer periphery R1 of the exterior body 40 has the periphery of the display body D (the 1st board | substrate 10 or the 2nd board | substrate 20); It is fixed to be located outside of Q2). That is, the surface (henceforth "border area") A2 of the observation side of the exterior body 40 contains the part located outside the periphery Q2 of the display body D. As shown in FIG. In addition, the display area A1 is located inside the opening 42 (inner periphery R2 of the outer package 40), and the outer periphery Q1 of the light shielding layer 21 is the opening 42 ( It is located outside the inner circumferential edge R2 of the exterior body 40.

As shown in Figs. 1 and 2, the antireflection plate 60 is a rectangular plate material molded in a form (dimensions and shapes) that coincide with the outer circumferential edge R1 of the exterior body 40. It is a large area compared with the 1st board | substrate 10 and the 2nd board | substrate 20 of D). As shown in FIG. 2, the antireflection plate 60 is joined to the edge region A2 so that the periphery of the antireflection plate 60 and the outer periphery R1 of the exterior body 40 coincide with each other. Therefore, the anti-reflection plate 60 covers the display area A1 and the border area A2 so as to cover both the display body D and the exterior body 40 exposed in the opening 42 of the exterior body 40. Continue across. As shown in FIG. 2, the area inside the opening portion 42 between the surface on the back side of the anti-reflection plate 60 and the surface on the observation side of the display body D (the second substrate 20). In the space, a space V at an interval corresponding to the thickness of the exterior body 40 and the double-sided tape 30 is interposed. As described above, since the antireflection plate 60 and the display body D are separated from each other with the space V interposed therebetween, the display body is compared with the structure in which the antireflection plate 60 and the display body D are in close contact with each other. Heat generated in (D) is difficult to transfer to the antireflection plate 60. Therefore, there is an advantage that the deterioration of the antireflection plate 60 (particularly the circular polarizing plate 64) due to heating can be suppressed.

As shown in FIG. 1 and FIG. 2, the antireflective plate 60 is composed of a support 62 and a circular polarizer 64. The support body 62 is a light transmissive sheet material that reinforces the mechanical strength of the circular polarizing plate 64. A substrate made of glass or resin (for example, acrylic resin or polycarbonate resin) is suitably employed as the support body 62. As shown in FIG. 2, the circular polarizing plate 64 is composed of a retardation plate 641 bonded to the surface of the support side 62 on the observation side, and a polarizing plate 642 adhered to the surface of the retardation plate 641. . Therefore, even when external light enters the display device 100A from the observation side and reflects from the surface of the light reflection layer 11 or the edge region A2 of the exterior body 40, the emission of the reflected light to the observation side is suppressed. .

Fig. 4 shows the characteristics of the reflected light emitted to the observation side when the visible light having a predetermined spot diameter (hereinafter referred to as “measurement light”) is irradiated from the observation side to each part of the display device 100A. It is a graph. 4 is the wavelength (nm) of the measurement light, and the vertical axis is the reflectance (that is, the ratio (%) of the light amount of the reflected light to the light amount of the measurement light).

In the configuration C1 of FIG. 4 except for the antireflective plate 60, the measurement light is irradiated into the display area A1 after the light emitting layer 15 of all the pixels P is completely turned off. The measurement result in the case. On the other hand, in the configuration of the present embodiment in which the antireflection plate 60 is provided, the characteristic C2 is the display area through the antireflection plate 60 after the light emitting layer 15 of all the pixels P is completely turned off. It is a measurement result in the case of irradiating a measurement light in (A1). As understood from the contrast between the characteristic C1 and the characteristic C2, each element of the display body D (especially the light reflection layer 11) among the incident light from the observation side with respect to the display device 100A. The amount of light reflected by and reflected to the observation side is sufficiently suppressed by the antireflection plate 60. Therefore, it is possible to suppress the reflection of the background.

The characteristic C3 of FIG. 4 is a measurement when the measurement light is irradiated to the edge region A2 of the exterior body 40 through the antireflection plate 60 under the configuration of this embodiment in which the antireflection plate 60 is provided. The result is. As understood from the contrast between the characteristic C2 and the characteristic C3, in this embodiment, the light reflection characteristic in the edge region A2 of the exterior body 40 and the display region of the display body D ( The optical characteristics of each element of the edge region A2 of the exterior body 40 or the display body D are selected so that the light reflection characteristics in A1) substantially match (approximately coincide). In more detail, the measurement light is individually irradiated to each of the edge area A2 of the exterior body 40 and the display area A1 of the display body D to measure the reflected light, When the difference value Δ of the measured reflectances for the same wavelength is calculated, the maximum value of the difference value Δ in the wavelength range R of 500 nm to 600 nm is 3% or less (more preferably 1%). The optical characteristics (more specifically, a material and a processing method) of each element of the edge area A2 of the exterior body 40 and the display body D are selected so that it may become the following). For example, a paint having an optical characteristic that satisfies an ideal condition with respect to a reflectance measured beforehand in the display area A1 of the display body D is applied to the surface of the plate (border area A2). The exterior body 40 is created by apply | coating.

As described above, in this embodiment, the antireflection plate 60 of the form (size and shape) continuous over the display area A1 and the edge area A2 is provided with the exterior body 40 and the display body D. It is installed to cover both. Therefore, the exterior 40 and the display body are not only suppressed from the background, but also compared with the structure in which the antireflection plate 60 is not provided or the antireflection plate 60 overlaps only the display area A1. It is possible to make the border with (D) inconspicuous. In this embodiment, in particular, the characteristics of the exterior body 40 and the display body D are selected so that the light reflection characteristics (reflectance) substantially match (approximately coincide) in the border area A2 and the display area A1. The above effects become particularly remarkable. Then, the boundary between the exterior body 40 and the display body D is not clear, so that the display area of the display device 100A is as if the user is near the outer periphery R1 of the exterior body 40 (reflection prevention). Perception as if it is continuous to the whole plate 60). That is, in this embodiment, it is possible to enlarge the area of the apparent display area without increasing the size of the display device 100A.

In addition, when the entire display area A1 is made to emit light, the boundary between the display area A1 and the non-light emitting edge area A2 is perceived by the user, so that the area of the apparent display area is increased. The effect is optical for a non-light emitting area other than the subject in the display area A1 as if the subject was placed in the center of the display area A1 against the background of black when the light emitting layer 15 was turned off. This is particularly effective in the case of displaying an image in which the characteristic is equal to the border area A2).

In the above description, although the measurement result at the time of irradiating the measurement light in the display area A1 was illustrated as characteristic C2, the area | region inside the opening part 42 of the exterior body 40 outside the display area A1. The measurement result at the time of irradiating measurement light to (the area | region in which the light shielding layer 21 exists) (GA) becomes substantially equivalent to the characteristic C2. Therefore, the optical properties of the exterior body 40 and the display body D are substantially matched (approximately) to the light reflection characteristics of the area GA and the light reflection characteristics in the edge area A2 of the exterior body 40. You may select the phosphorus characteristic.

By the way, in the structure of FIG. 2, although the outer periphery Q1 of the light shielding layer 21 is located outside the opening part 42 of the exterior body 40, as shown in FIG. 5, outside of the light shielding layer 21 is shown. The structure in which the peripheral edge Q1 is located inside the opening part 42 (inner peripheral R2) of the exterior body 40 is also employ | adopted. The characteristic C4 of FIG. 4 irradiates a measurement light to the area | region GB between the outer periphery Q1 of the light shielding layer 21, and the inner periphery R2 of the exterior body 40 among the structures of FIG. This is the result of measuring the reflectance.

Since the wiring (not shown) for supplying a drive signal or a power supply potential is formed in the display area A1 in the area of the area GB of the first substrate 10, the characteristic C4 of the area GB is 4, the characteristic C3 of the edge area A2 of the exterior body 40 differs from the characteristic C2 in the display area A1. Therefore, in the configuration of FIG. 5, the boundary between the exterior body 40 and the display body D is surely inconspicuous as compared with the configuration in which the antireflective plate 60 is excluded (characteristic C1). Although possible, the boundary is likely to be perceived in comparison with the configuration of FIG. That is, in the structure of FIG. 2, since the outer periphery Q1 of the light shielding layer 21 is located outside the inner periphery R2 of the exterior body 40, the exterior body 40 compared with the structure of FIG. ) And the display body (D) is inconspicuous.

<B: Second Embodiment>

6 is an exploded perspective view showing the configuration of the display device 100B according to the second embodiment of the present invention. As shown in FIG. 6, the display device 100B is a planar type in which an exterior body 40 and an antireflective plate 60 are laminated on a display body DA and a display body DB disposed apart from each other in the same plane. It is a structure. Each of the display body DA and the display body DB has the same configuration as that of the display body D of the first embodiment, and is formed by a plurality of pixels P arranged in a plane shape in the display area A1. Displays an image. In the following description, when the display body DA and the display body DB do not need to be distinguished in particular, both are denoted as "display body D" in common.

7 is a conceptual diagram showing the planar relationship between the elements of the display device 100B. However, in FIG. 7, illustration of the anti-reflective plate 60 is abbreviate | omitted. 8 is a cross-sectional view (that is, a cross-sectional view of the periphery of the outer periphery of the exterior body 40) seen from the line Xa-Xa or Xb-Xb in FIG. 7, and FIG. 9 is X- in FIG. It is sectional drawing seen from the X-ray line (namely, sectional drawing of the vicinity of the clearance gap between display body DA and display body DB). As shown in FIG.7 and FIG.8, the dimension of the external shape of the light shielding layer 21 is large compared with display area A1. Therefore, the outer periphery Q1 of the light shielding layer 21 is located outside the display area A1.

As shown in FIG.6 and FIG.7, the exterior body 40 is an opaque board | plate material in which the opening part 42 of rectangular shape was formed in two places corresponding to each of the display body DA and the display body DB. The exterior body 40 is bonded by the double-sided tape 30 to the surface on the observation side of each display body D (that is, the surface of the observation side of the 2nd board | substrate 20).

As shown in FIGS. 7 and 8, the exterior body 40 and each display body D have an outer circumferential edge R1 of the exterior body 40 on the outer side of the peripheral edge Q2 of each display body D. FIG. It is fixed to be located. Therefore, the edge area | region A2 which is the surface on the observation side of the exterior body 40 contains the part A2a located outside the periphery Q2 of each display body D, as shown in FIG. . In addition, in this embodiment, since the display body DA and the display body DB are separated from each other, as shown in FIG. 9, the edge area A2 has a clearance between the display body DA and the display body DB. And a portion A2b located within. 7 to 9, the display area A1 of each display body D has an opening 42 corresponding to the display body D (inner circumferential edge R2 of the exterior body 40). ), And the outer circumferential edge Q1 of the light shielding layer 21 of each display body D has an opening 42 corresponding to the display body D (the inner circumferential edge of the outer body 40). R2) outside.

6 and 8, the anti-reflection plate 60 is a rectangular plate formed in a shape (dimensions and shapes) matching with the outer circumferential edge R1 of the exterior body 40. It is large compared with the total area of DA) and the indicator (DB). As in the first embodiment, the antireflection plate 60 is composed of the support body 62 and the circular polarizing plate 64.

The antireflection plate 60 is joined to the edge region A2 so that the periphery of the antireflection plate 60 and the outer periphery R1 of the exterior body 40 coincide with each other. Therefore, the anti-reflection plate 60 covers each display area DA so as to cover both the display body DA and the display body DB and the exterior body 40 exposed from each opening 42 of the exterior body 40. It continues over A1) and the edge area | region A2. As shown in FIG. 8 and FIG. 9, a space V is interposed between the surface on the back side of the antireflection plate 60 and the surface on the observation side of each display body D. As shown in FIG. Therefore, compared with the structure in which the antireflection plate 60 is in close contact with the display body D, heat generated in the display body D is less likely to be transmitted to the antireflection plate 60. That is, there exists an advantage that the deterioration of the circularly polarizing plate 64 resulting from heating can be suppressed.

As described with reference to FIG. 4, also in this embodiment, the light reflection characteristics in the edge region A2 of the exterior body 40 and the light reflection characteristics in the display region A1 of each display body D. FIG. The optical characteristic of each element of the edge area A2 of the exterior body 40 or the display body D is selected so that this may correspond substantially. In more detail, the measurement light is individually irradiated to each of the edge area A2 of the exterior body 40 and the display area A1 of the display body D to measure the reflected light, When the difference value Δ of the measured reflectances for the same wavelength is calculated, the maximum value of the difference value Δ in the wavelength range R of 500 nm to 600 nm is 3% or less (more preferably 1%). The optical characteristics (more specifically, a material and a processing method) of each element of the edge area A2 of the exterior body 40 and the display body D are selected so that it may become the following).

As described above, in this embodiment, the antireflection plate 60 of the form (size and shape) that is continuous over the display area A1 and the edge area A2 is provided with the exterior body 40 and each display body D. ) Are installed to cover both sides. Therefore, not only the reflection of the background is suppressed, but also the exterior where the antireflection plate 60 is not provided or the antireflection plate 60 overlaps only the display area A1 of each display body D. The boundary between the sieve 40 (parts A2a and A2b) and the display body D can be made inconspicuous. In this embodiment, in particular, since the characteristics of the exterior body 40 and each of the display bodies D are selected so that the light reflection characteristics (reflectance ratios) substantially match in the edge region A2 and the display region A1, the above-described effects It becomes very remarkable. Then, the boundary between the exterior body 40 and the display body D is not clear, so that the observer is assured that the display area of the display device 100B is as close to the outer periphery R1 of the exterior body 40 as antireflection. Perception as if it is continuous to the whole plate 60). That is, in this embodiment, it is possible to enlarge the area of the apparent display area without increasing the size of the display device 100B.

<C: Third Embodiment>

Next, a third embodiment of the present invention will be described. In addition, below, although the structure based on 1st Embodiment is illustrated, 3rd Embodiment-6th Embodiment display of 2nd Embodiment provided with some display body D (DA, DB). The same applies to the apparatus 100B.

10 is a cross sectional view showing a configuration of a display device 100C according to a third embodiment of the present invention. As shown in Fig. 10, an AR (Anti Reflection) coat layer 70 (70A, 70B) for suppressing reflection on the surface is provided on a surface of the light transmissive element of the display device 100C in contact with air. 70C) is formed. More specifically, an AR coat layer 70A is formed on the surface of the anti-reflection plate 60 (the circular polarizing plate 64 on the observation side, and on the surface of the back side of the anti-reflection plate 60 (the support 62). An AR coat layer 70B is formed, and an AR coat layer 70C is formed on the surface on the observation side of the display body D (second substrate 20).

In the structure of 1st Embodiment, since the surface of the back side of the anti-reflective plate 60 and the surface of the observation side of the display body D contact with air, the light emitted from the light emitting layer 15 will reflect on the said surface. easy to do. In contrast, in this embodiment, reflection on the surface on the back side of the antireflection plate 60 and on the surface on the observation side of the display body D is suppressed by the AR coat layers 70 (70B, 70C). It is possible to improve the utilization efficiency of the emitted light from the light emitting layer 15. In addition, since the AR coat layer 70A is formed on the surface on the observation side of the antireflection plate 60, there is an advantage that the reflection of the background due to reflection on the surface is effectively prevented.

<D: fourth embodiment>

11 is a cross sectional view showing a configuration of a display device 100D according to a fourth embodiment of the present invention. As shown in FIG. 11, the surface on the back side of the anti-reflection plate 60 (support 62), the surface on the side of observation of display body D (second substrate 20), and exterior body 40 The light-transmitting filler 75 is filled in the space V surrounded by the inner circumferential surface of the opening part 42 of (). The filler 75 is formed of a resin material, for example. The refractive index of the filler 75 is equal to the refractive index of at least one of the support body 62 and the second substrate 20.

According to the above structure, since the difference of the refractive index between the inside of space V and the support body 62 or the 2nd board | substrate 20 is reduced compared with the structure which air exists in space V, reflection prevention Light reflection on the surface of the back side of the board 60 and the surface of the observation side of the display body D is suppressed. Therefore, despite the configuration in which the AR coat layers 70B and 70C in the third embodiment are omitted, it is possible to increase the utilization efficiency of the emitted light from the light emitting layer 15. However, the AR coat layers 70B and 70C of FIG. 10 may be formed in the configuration of FIG.

<E: 5th Embodiment>

12 is a cross-sectional view illustrating a configuration of a display device 100E according to the fifth embodiment. As shown in FIG. 12, the exterior body 40 in this form is a plate-shaped member arrange | positioned at the back side of the display body D. As shown in FIG. An opening is not formed in the exterior body 40. The surface on the back side of the display body D (first substrate 10) is bonded to the surface of the exterior body 40. The region outside of the periphery Q2 of the display body D becomes the edge region A2 among the surfaces on the observation side of the exterior body 40. The light shielding layer 21 of the display body D is formed over the whole of the second substrate 20.

The anti-reflection plate 60 is provided so as to be continuous over the edge area A2 and the display area A1 to cover the exterior body 40 and the display body D. FIG. In addition, similarly to the first embodiment, the light reflection characteristics in the edge region A2 of the exterior body 40 and the light reflection characteristics in the display region A1 of the display body D substantially coincide with each other. The optical characteristics of each element of the edge region A2 of the exterior body 40 or the display body D are selected. Therefore, also in this embodiment, the same effects as in the first embodiment are obtained. In addition, according to this embodiment, there is an advantage that the work of joining the exterior body 40 and the display body D is facilitated, and the mechanical strength of the display body D is reinforced by the exterior body 40. In addition, you may add AR coat layer 70 (70A, 70B, 70C) of 3rd Embodiment to the display apparatus 100E of this embodiment.

<F: 6th Embodiment>

13 is a cross-sectional view illustrating a configuration of a display device 100F according to the sixth embodiment. As shown in FIG. 13, the display apparatus 100F of this embodiment is the structure which added the characteristic adjustment layer 80 to the display apparatus 100A of 1st Embodiment. The characteristic adjustment layer 80 is formed of the display area A1 of the display body D among the surfaces on the back side of the anti-reflection plate 60 (that is, the surface facing the display body D on the support body 62). It is a light reflective (light-shielding) film formed to cover a region located outside. The characteristic adjustment layer 80 is formed of a resin material in which black materials such as carbon black are dispersed, and light-shielding metal materials such as chromium. Moreover, you may form the characteristic adjustment layer 80 by apply | coating a black paint to the anti-reflective plate 60. FIG.

The processing method, the material, and the film thickness of the characteristic adjustment layer 80 include light reflection characteristics of the contact surface with the antireflection plate 60 in the characteristic adjustment layer 80 and the display area A1 of the display body D. Are selected so that their light reflection characteristics are approximately the same. That is, in the wavelength range R of 500 nm or more and 600 nm or less, the same as the conditions described above with reference to FIG. 4 for the edge area A2 of the exterior body 40 and the display area A1 of the display body D. FIG. Characteristic adjustment layer so that the maximum value of the difference value (DELTA) between the reflectance of the characteristic adjustment layer 80 and the reflectance of the display area A1 at the time of irradiation of light may be 3% or less (more suitably 1% or less). 80 is formed.

As described above, since the optical characteristics of the characteristic adjusting layer 80 positioned on the observation side with respect to the exterior body 40 coincide with the display area A1, the edge region A2 and the display body of the exterior body 40 are described. Even when the light reflection characteristics (reflectance) differ in the display area A1 in (D), the same effect as in the first embodiment can be obtained in that the area of the apparent display area can be enlarged. Therefore, the present invention is particularly suitable when it is difficult to match the optical characteristics of the exterior body 40 to the display area A1 (for example, when the material or processing method of the exterior body 40 is restricted). . In other words, since the optical conditions required for the exterior body 40 are alleviated, the exterior body 40 can be produced at low cost.

In addition, although the structure whose characteristic adjustment layer 80 is a single layer was illustrated in FIG. 13, the structure which made the characteristic adjustment layer 80 into the laminated body of multiple layers is also suitable as illustrated in FIG. The characteristic adjusting layer 80 of FIG. 14 is composed of a first layer 81 and a second layer 82. The 1st layer 81 is a film body of light reflection (shielding property) formed in the surface (region outside of display area A1) of the back surface side of the antireflection plate 60. The second layer 82 is a light shielding film body laminated on the first layer 81. The first layer 81 and the second layer 82 are separate materials selected from various light blocking materials such as resin materials in which black materials such as carbon black are dispersed, and light blocking metal materials such as aluminum and chromium. Is formed. For example, a configuration in which the first layer 81 is formed of one of aluminum and chromium, and the second layer 82 is formed of the other of aluminum and chromium is very suitable. As shown in FIG. 14, a plurality of openings 821 are formed (patterned) in the second layer 82. Each opening 821 is distributed uniformly in the surface of the 2nd layer 82. For example, the second layer 82 is formed to have the same pattern as the light shielding layer 21 of the display body D.

Since the first layer 81 is formed with a sufficiently thin film thickness, the optical characteristic of the contact surface with the antireflection plate 60 in the characteristic adjusting layer 80 is in addition to the characteristics of the first layer 81. It also depends on the properties of the second layer 82. That is, the optical characteristic of the characteristic adjustment layer 80 changes with the dimension and distribution (total number or density) of the opening 821 formed in the 2nd layer 82. FIG. Therefore, by appropriately selecting the dimensions and distribution of the openings 821 of the second layer 82, the light reflection characteristics of the characteristic adjusting layer 80 are matched with the display area A1 of the display body D with high accuracy. It is possible to make the boundary between the characteristic adjusting layer 80 and the display area A1 inconspicuous.

In addition, although the case where the characteristic adjustment layer 80 was added to the display apparatus 100A of 1st Embodiment was illustrated in FIG. 13 and FIG. 14, the structure of FIGS. 6-12 (or the structure of FIG. 15 mentioned later) is shown. The structure which added the characteristic adjustment layer 80 to the inside is also suitable.

In the example of FIG. 14, the first layer 81 and the second layer 82 are formed only in the region outside the display area A1, but the light emitted from the display body D sufficiently passes through the observation side. In the case of forming the first layer 81 at a film thickness of a degree (for example, when a thin film of sufficiently thin aluminum is formed as the first layer 81), the surface of the back side of the antireflection plate 60 is formed. The first layer 81 may be formed over the whole area. According to the above structure, patterning becomes unnecessary at the time of formation of the 1st layer 81. FIG. In addition, by appropriately selecting the film thickness of the characteristic adjusting layer 80 in FIG. 13, or at least one of the first layer 81 and the second layer 82 in FIG. The method of adjusting the light reflection characteristic of (80) is also very suitable.

<G: modified example>

Various modifications can be made to each of the above forms. Illustrative forms of specific modifications are as follows. Moreover, you may select and combine two or more forms arbitrarily from the following examples.

(1) Modification Example 1

The shape or position of the exterior body 40 is not limited to the above example. For example, as shown in FIG. 15, an opening 42 is formed in the exterior body 40 having a dimension substantially coincident with (or slightly larger) the outer shape of the display body D, so that the display body D is formed. You may arrange | position the display body D inside the opening part 42 so that a side end surface and the inner peripheral surface of the opening part 42 may face. As shown in Fig. 15, according to the configuration in which the surface on the viewing side of the display body D (second substrate 20) and the edge region A2 are positioned in the same plane, the antireflection plate 60 is covered. The display device 100 (100A, 100B, 100C, 100D, 100E, etc.) can be easily and firmly bonded to the sieve 40 and the display body D and the space V is omitted. 100F) has an advantage of thinning.

(2) Modification 2

As long as the mechanical strength of the circularly polarizing plate 64 is ensured alone to the extent necessary for the manufacture or use of the display device 100, a configuration in which the support 62 is omitted from the antireflection plate 60 is also employed. In addition, in order to prevent the damage of the circularly polarizing plate 64 by the effect of an external force, you may arrange | position a light transmissive board | plate material on the observation side of the circularly polarizing plate 64. As shown in FIG.

(3) Modification 3

The configuration in which the forms (dimensions and shapes) of the plurality of display bodies D (DA, DB) in the second embodiment are common is not essential in the present invention. That is, the size and shape of each display body D may differ for every display body D. In addition, in FIG. 6, although the structure which the some display body D separated from each other was illustrated, the structure in which each display body D was arrange | positioned without gap (for example, the side surface of display body DA and display body DB Is also suitable. However, according to the structure of 2nd Embodiment in which each display body D is mutually arrange | positioned, compared with the structure which each display body D contacts, the area | region of an external display area can be enlarged easily, There is an advantage that the form (for example, position) of the arrangement of each display body D can be selected with high degree of freedom.

(4) Modification 4

The form of arrangement | positioning of several display body D in 2nd Embodiment is arbitrary. The form of the specific arrangement | positioning of each display body D is illustrated below. As will be understood from the following examples, in the display device 100 according to the specific embodiment of the present invention, since a plurality of display bodies D are arranged, the display is compared with the configuration using only one display body D. It is possible to increase the degree of freedom in design of the device 100. The configuration illustrated in Figs. 16 to 18 is particularly suitable for displaying images of goods in various stores, for example.

The number of display bodies D constituting the display device 100 is arbitrary. For example, as shown in FIG. 16, the structure which arrange | positioned five display bodies D in substantially cross shape is employ | adopted. The exterior body 40 (not shown in Fig. 16) or the antireflection plate 60 is molded into a suitable shape covering all the display bodies D.

The plurality of display bodies D need not be arranged in parallel. For example, as shown in FIG. 17, the structure which arrange | positioned the some display object D in the curved shape along the wall surface of structures (pillar body 35), such as a building, is also employ | adopted. The display device 100 of FIG. 17 is formed of a plurality of display bodies D arranged along the circumferential direction on the side of the columnar pillar 35 and a curved surface along the side surface of the columnar body 35. An antireflection plate 60 is provided. In addition, illustration of the exterior body 40 is abbreviate | omitted in FIG.

It is not necessary for the plurality of display bodies D to be located in the same plane. For example, as shown in FIG. 18, you may arrange | position the some display body D so that the distance to the planar antireflection plate 60 may differ for every display body D. FIG. As shown in Fig. 18, the exterior body 40 is shaped into a step shape.

(5) Modification 5

 The light emitting layer 15 of the organic EL material is only an example of the electro-optical layer. The electro-optical layer applied to each of the above-described display apparatuses 100 differs from the self-luminous type that emits light and a non-luminous type (for example, a liquid crystal element) that changes the transmittance of external light, or supplies current. The distinction between the current driven type driven by and the voltage driven type driven by application of voltage is irrelevant. Various electro-optical layers, such as a light emitting layer of an inorganic EL material, a liquid crystal layer and an electrophoretic layer, are used in the display device of the present invention. That is, the electro-optical layer is defined as a portion in which optical characteristics such as brightness and transmittance change by supply of electrical energy (for example, supply of current or application of voltage).

<H: Application Example>

Next, an electronic device using the display device according to the present invention will be described. 19 to 22 show a form of an electronic device employing the display device 100 (100A, 100B, 100C, 100D, 100E, 100F) according to any one of the forms described above.

19 is a perspective view showing the configuration of a mobile personal computer employing the display device 100. The personal computer 2000 is provided with the display apparatus 100 which displays various images, and the main-body part 2010 in which the power switch 2001 and the keyboard 2002 were provided.

20 is a perspective view showing the structure of a mobile telephone to which the display device 100 is applied. The mobile phone 3000 includes a plurality of operation buttons 3001 and scroll buttons 3002, and a display device 100 displaying various images. By operating the scroll button 3002, the screen displayed on the display device 100 is scrolled.

21 is a perspective view showing the configuration of a portable digital assistant (PDA) to which the display device 100 is applied. The portable information terminal 4000 includes a plurality of operation buttons 4001, a power switch 4002, and a display device 100 displaying various images. When the power switch 4002 is operated, various types of information such as an address book and a schedule notebook are displayed on the display device 100.

FIG. 22 is a conceptual diagram illustrating a form in which the display device 100B according to the second embodiment is employed in an on-vehicle instrument panel of an automobile. As shown in FIG. 22, the on-vehicle instrument includes a display device 100B in which the display body DA and the display body DB are arranged in the horizontal direction, the drive circuits 82A, 82B, and the control circuit 84. Equipped. The drive circuit 82A displays the image instructed by the control circuit 84 on the display body DA. The drive circuit 82B displays the image instructed by the control circuit 84 on the display body DB. For example, the control circuit 84 displays the speed of the car on the display DA and displays a map created by the car navigation device (not shown) to guide the route to the destination on the display DB. Let's do it.

The control circuit 84 is connected with a detector (not shown) for detecting abnormality of the display body DA or the display body DB. For example, the temperature sensor which detects the temperature of the display body DA or the display body DB, the ammeter which detects the electric current which flows through the light emitting layer 15 of each pixel P, or the brightness | luminance of each pixel P is measured. A luminance meter to measure is suitably employed as a detector. The control circuit 84 determines that an abnormality has occurred in the display body DA or the display body DB when the detected value by the detector exceeds (or falls below a predetermined threshold value) and executes the predetermined control. do. For example, when the abnormality of the display body DA is detected, the control circuit 84 causes the display body DB to display the speed of the vehicle displayed on the display body DA. According to the above aspect, in the state in which there is no abnormality, various images can be displayed using both the display body DA and the display body DB, and an abnormality in either of the display body DA or the display body DB is carried out. When this occurs, there is an advantage that the high priority information (for example, speed) can be surely displayed by changing the display destination of the desired information to the other display member D.

As the electronic apparatus to which the display device according to the present invention is applied, in addition to the apparatus illustrated in Figs. 19 to 22, a digital still camera, a television, a video camera, a car navigation apparatus, a pager, an electronic notebook, Examples include electronic paper, electronic calculators, word processors, workstations, TV phones, POS terminals, printers, scanners, copiers, video players, and touch panels.

1 is an exploded perspective view of a display device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the display device of FIG. 1.

3 is a plan view illustrating a relationship between elements of the display device of FIG. 1.

4 is a graph showing optical characteristics of each part of the display device of FIG.

5 is a cross-sectional view of a display device according to another example.

6 is an exploded perspective view of a display device according to a second embodiment of the present invention.

FIG. 7 is a plan view illustrating a relationship between elements of the display device of FIG. 6.

FIG. 8 is a cross-sectional view taken along line VII-VIIa or VIIb-VIIb in FIG. 7.

FIG. 9 is a sectional view taken along the line VII-VII in FIG. 7. FIG.

10 is a cross-sectional view of a display device according to a third embodiment of the present invention.

11 is a cross-sectional view of a display device according to a fourth embodiment of the present invention.

12 is a cross-sectional view of a display device according to a fifth embodiment of the present invention.

13 is a cross-sectional view of a display device according to a sixth embodiment of the present invention.

14 is a cross-sectional view of a display device according to another embodiment of the sixth embodiment.

15 is a cross-sectional view of a display device according to a modification.

16 is a plan view of a display device according to a modification of the second embodiment.

17 is a cross-sectional view of a display device according to a modification of the second embodiment.

18 is a sectional view of a display device according to a modification of the second embodiment.

Fig. 19 is a perspective view showing a form (personal computer) of an electronic apparatus according to the present invention.

20 is a perspective view showing a form of a electronic device (mobile phone) according to the present invention.

Fig. 21 is a perspective view showing a form (portable information terminal) of an electronic device according to the present invention.

Fig. 22 is a block diagram showing a form (vehicle mounting instrument) of an electronic apparatus according to the present invention.

Claims (13)

A display body in which a light reflection layer for reflecting the light emitted from the electro-optical layer to the observation side is formed in the display area; A plate-shaped exterior body having an edge region including a portion located outside the periphery of the display body; A plate material which covers both of the display area and the edge area in succession, the display having an antireflection plate which suppresses the emission of external light incident from the observation side and reflected from the light reflection layer or the edge area to the observation side. Device. The method of claim 1, The reflectance (%) when the measurement light is irradiated to the edge area of the exterior body through the antireflection plate, and the measurement light is irradiated to the display area of the display object through the antireflection plate. The maximum value of the difference in the same wavelength as the reflectance (%) at the time of doing is 3% or less in the range whose wavelength of the said measurement light is 500 nm or more and 600 nm or less. The method of claim 1, And the exterior body is a frame-shaped member having an opening formed such that the display area of the display body is positioned inside the inner periphery. The method of claim 3, The display body includes a light shielding layer that shields gaps between pixels. An outer periphery of the light blocking layer is located outside the inner periphery of the exterior body. The method of claim 3, The exterior body is bonded to the surface of the viewing side of the display body, The anti-reflection plate is bonded to the surface of the observation side of the exterior body. The method of claim 5, And an AR coat layer formed on at least one of an opposing surface of the antireflection plate to the display body and an opposing surface of the display body to the antireflection plate. The method of claim 5, And a light-transmitting filler filled in a space between the surface of the display body on the observation side and the gap between the anti-reflection plate. The method of claim 1, The exterior device is a display device which is a plate-shaped member disposed on the back side of the display body. The method of claim 1, And a light blocking property adjusting layer including a portion located outside the display area on an opposite surface of the anti-reflection plate to the display body. A plurality of displays formed in the display area with a light reflection layer that reflects the emitted light from the electro-optical layer to the observation side; A plate-shaped exterior member having an edge region including a portion located outside the periphery of each display body; A plate member which continuously covers both the display area and the edge area of the plurality of display objects, and emits light emitted from the observation side to the observation side of external light reflected from the light reflection layer or the edge area of each display body. A display device provided with an antireflection plate to suppress. The method of claim 10, The plurality of display bodies are disposed apart from each other, And the exterior body includes a portion positioned in a gap between the display bodies adjacent to each other. The method of claim 10, The reflectance (%) when the measurement light is irradiated to the edge region of the exterior body through the antireflection plate, and when the measurement light is irradiated to the display area of each display object through the antireflection plate. The maximum value of the difference value in the same wavelength as the reflectance (%) of the display device is 3% or less in the range whose wavelength of the said measurement light is 500 nm or more and 600 nm or less. An electronic device comprising the display device of claim 1.

Images