JP6919325B2 - Display device, array type display device - Google Patents

Description

The present invention relates to a display device for displaying an image and an array type display device in which the display devices are arranged.

Conventionally, various display devices such as a rear projection type display device, a plasma display device, a liquid crystal display device, and an organic EL (Electro-Lumisensence) (organic LED (light-emitting diode)) display device have been developed. With respect to such an array type display device, in order to display a better image, the weather resistance of the screen, the flatness of the screen, the visibility, and the like are improved (see, for example, Patent Documents 1 and 2). ).
In addition, an array-type display device or the like has been developed in which a plurality of these display devices are arranged to increase the screen size.

JP-A-2007-192977 International Publication No. 2008/149449

In the rear projection type display device, a frame structure for holding a transmissive screen for displaying an image is required, and in a plasma display device, a liquid crystal display device, and an organic EL display device, the display unit for displaying the image is made of glass or the like. Therefore, a frame structure for holding the panel is required at the peripheral edge of the display unit, and various wiring portions and the like are also present at the peripheral edge of the display unit.
Due to such a frame structure and wiring portion, in various display devices, there is a non-display area in which an image is not displayed on the peripheral portion of the display portion. In recent years, from the viewpoint of improving the design of the display device, there is an increasing demand for making this non-display area wider.

In particular, in an array-type display device in which various display devices are arranged to increase the screen size, a frame-shaped joint portion (joint portion) is formed between the arranged display devices by a non-display area in which no image is displayed. Therefore, there is a problem that the continuity of the image as an array type display device is lowered and the image quality is deteriorated.

An object of the present invention is to provide a display device and an array type display device in which a non-display area located at a peripheral edge of a display screen is hard to be visually recognized.

The present invention solves the above problems by the following solutions. In addition, in order to facilitate understanding, the description will be given with reference numerals corresponding to the embodiments of the present invention, but the present invention is not limited thereto.
The first invention is an array type display device in which a plurality of display devices (10) are arranged adjacent to each other, and the display device has a display area (110) capable of displaying an image and an outer periphery of the display area. A display unit (100) having a non-display area (120) provided on the side along the peripheral edge of the display area and not displaying an image, and a display unit (100) provided on the observer side of the display unit to display the display. A sheet-shaped optical member (200) that covers the region and the non-display region and has translucency, and the optical member covers at least the non-display region when viewed from the normal direction of the display region. A plurality of reflective layers (232) are arranged and provided on the observer side in the thickness direction of the optical member in the area to be covered, and the reflective layer is the reflective layer when viewed from the front direction of the display device. The non-display area extends in the direction parallel to the inner peripheral edge of the display area side as the longitudinal direction, and is arranged in the direction from the inner peripheral edge toward the outer peripheral edge side of the non-display area. In the cross section of the optical member parallel to the thickness direction of the optical member and the arrangement direction of the reflection layer, the end portion on the display portion side is located closer to the center side of the optical member than the end portion on the observer side. It is an array type display device (1, 2, 3, 4, 5) characterized by being tilted.
A second aspect of the present invention is the array type display device of the first invention, wherein the reflective layer (232) is formed in a cross section of the optical member parallel to the thickness direction of the optical member (200) and the arrangement direction of the reflective layer. An array-type display device, wherein the angle formed by the display region (110) with respect to the normal direction increases from the inner peripheral edge side to the outer peripheral edge side along the arrangement direction of the reflective layer. (2).
The third invention is the array type display device of the first or second invention, wherein the reflection layer (232) is the optical member parallel to the thickness direction of the optical member (200) and the arrangement direction of the reflection layer. The array type display device (4) is characterized in that, in the cross section of the above, the reflective layer is curved so as to be convex toward the inner peripheral edge side in the array direction.
According to a fourth aspect of the present invention, in any of the array-type display devices according to the first to third inventions, the display area (110) has a rectangular shape when viewed from the normal direction, and the optical member has a rectangular shape. A plurality of unit lenses (261) convex to the observer side are formed along the longitudinal direction of the reflective layer on a part of the area on the observer side surface that covers at least the plurality of reflective layers (232). The array-type display device (3) is characterized in that it extends and is arranged in a direction parallel to the arrangement direction of the reflective layer.
A fifth aspect of the invention is an array-type display device according to any one of the first to fourth inventions, wherein the display device (10) has a holding portion (600) for holding the optical member in the non-display area (120). ) Is provided in at least a part of the array type display device (5).

A sixth aspect of the present invention is a display area (110) capable of displaying an image and a non-display area (120) provided on the outer peripheral side of the display area along the peripheral edge of the display area so as not to display an image. A display unit (100) including the above, and a plate-shaped optical member (200) provided on the observer side of the display unit, covering the display area and the non-display area, and having translucency. In the display device, the optical member is a region that covers at least the non-display region when viewed from the normal direction of the display region, and has a plurality of reflective layers on the observer side in the thickness direction of the optical member. (232) are arranged and provided, and the reflective layer is parallel to the inner peripheral edge of the non-display region on the display region side corresponding to the region where the reflective layer is provided when viewed from the front direction of the display device. In the cross section of the optical member, which extends in the longitudinal direction and is arranged in the direction from the inner peripheral edge toward the outer peripheral edge side of the non-display region, and is parallel to the thickness direction of the optical member and the arrangement direction of the reflective layer. The display device (10) is characterized in that the end portion on the display portion side is inclined so as to be located on the central side of the optical member with respect to the end portion on the observer side.
A seventh aspect of the invention is the display device of the sixth aspect, wherein the reflective layer (232) is a cross section of the optical member parallel to the thickness direction of the optical member (200) and the arrangement direction of the reflective layer. The display device (10) is characterized in that the angle formed by the display region with respect to the normal direction increases from the inner peripheral edge side to the outer peripheral edge side along the arrangement direction of the reflective layers.
The eighth invention is the display device of the sixth or seventh invention, in which the reflective layer (232) is a cross section of the optical member parallel to the thickness direction of the optical member (200) and the arrangement direction of the reflective layer. The display device (10) is characterized in that it is curved so as to be convex toward the inner peripheral edge side in the arrangement direction of the reflective layer.
A ninth aspect of the invention is the display device according to any one of the sixth to eighth aspects, wherein the display area (110) has a rectangular shape when viewed from the normal direction, and the optical member (200). A plurality of unit lenses (261) convex to the observer side are formed along the longitudinal direction of the reflective layer on a part of the region covering at least the plurality of reflective layers (232) on the observer side surface. The display device (10) is characterized in that it extends in a vertical direction and is arranged in a direction parallel to the arrangement direction of the reflective layers.
In the tenth invention, in any of the display devices according to the sixth to ninth inventions, a holding portion (600) for holding the optical member is provided in at least a part of the non-display region (120). It is a display device (10) characterized by being present.

According to the present invention, it is possible to provide an array type display device and a display device in which a non-display area located at a peripheral edge of a display screen is hard to be visually recognized.

It is a figure explaining the array type display device 1 of 1st Embodiment. It is a figure explaining the display part 100 and the optical member 200 of the display device 10 of 1st Embodiment. It is a figure explaining the display part 100 and the optical member 200 of the display device 10 of 1st Embodiment. It is a figure which shows a part of the cross section of the array type display device 1 of 1st Embodiment. It is a figure explaining the array type display device 2 of the 2nd Embodiment. It is a figure which shows a part of the cross section of the array type display device 3 of 3rd Embodiment. It is a figure which shows a part of the cross section of the array type display device 4 of 4th Embodiment. It is a figure which shows a part of the cross section of the array type display device 5 of a modified form. It is a figure which shows the deformation form of the reflection layer 232 of a corner part. It is a figure which shows the deformation form of the optical member 200. It is a figure explaining the modified form of an array type display device.

Hereinafter, embodiments of the present invention will be described with reference to the drawings and the like. It should be noted that each of the figures shown below, including FIG. 1, is a diagram schematically shown, and the size and shape of each part are exaggerated as appropriate for easy understanding.
In the present specification, terms that specify a shape or a geometric condition, for example, terms such as parallel and orthogonal, have the same optical function in addition to their strict meanings, and can be regarded as parallel or orthogonal. It shall also include the state having the error of.
Further, the numerical values such as the dimensions of each member and the material names described in the present specification are examples as an embodiment, and are not limited to these, and may be appropriately selected and used.

Further, in this specification, terms such as board and sheet are used, but as a general usage, these are used in the order of thickness, board, sheet, and film. It is used accordingly in the specification. However, since there is no technical meaning in such proper use, these words can be replaced as appropriate.
Further, in the present specification, the sheet surface means a surface of a sheet-like member that is in the plane direction of the sheet when viewed as the whole sheet. The same applies to the plate surface and the film surface.

(First Embodiment)
FIG. 1 is a diagram illustrating an array type display device 1 of the first embodiment.
1 (a) is a perspective view of the array type display device 1, and FIG. 1 (b) is parallel to the thickness direction of the array type display device 1 along the arrows A1-A2 shown in FIG. 1 (a). It is a figure which showed the cut cross section.
Here, in each of the following figures including FIG. 1, the XYZ Cartesian coordinate system is appropriately used. The left-right direction of the screen of the array type display device 1 is the X direction, the up-down direction of the screen is the Y direction, and the thickness direction (depth direction) is the Z direction. The upper side of is the + Y side, and the observer side in the thickness direction is the + Z direction.
Further, in order to facilitate understanding, in the display device 10 (optical member 200 and display unit 100) described later, the center side (screen center side, center side of the optical member 200) of the display area 110 for displaying an image is inside. The outer peripheral edge side of the non-display area 120 is referred to as the outer side.

The array type display device 1 is a display device in which a plurality of display devices 10 are arranged adjacent to each other to form a large screen.
In the present embodiment, the four display devices 10 (10A to 10D) are arranged adjacent to each other so that the display surface capable of displaying the image is located on one plane.
Further, the four display devices 10 (10A to 10D) of the present embodiment are vertically and horizontally, that is, two in each of the screen vertical direction (Y direction) and the screen left and right direction (X direction) of the array type display device 1 in the used state. They are arranged adjacent to each other, and their shape is rectangular when viewed from the observer side (+ Z side).
The number of display devices 10 forming the array type display device 1 can be changed according to the desired size of the screen size and the like, and is not limited to four, but may be two, six or eight. , 9 and so on.

2 and 3 are views for explaining the display unit 100 and the optical member 200 of the display device 10 of the first embodiment.
FIG. 2A shows a plan view of the optical member 200, and FIG. 2B shows a plan view of the display unit 100. Further, FIG. 3 (a) is a cross-sectional view of the optical member 200 parallel to the screen left-right direction and the thickness direction (X direction and Z direction), and FIG. 3 (b) shows a part of FIG. 3 (a). It is an enlarged view, and FIG. 3C shows a cross-sectional view of the display unit 100 parallel to the screen left-right direction and the thickness direction (X direction and Z direction).
For ease of understanding, FIGS. 2 and 3 show the display unit 100 and the optical member 200 in one display device 10 as representatives, but the other three arranged as the array type display device 1. The two display devices 10 have the same shape.

The display device 10 has a display unit 100 that displays an image, and an optical member 200 that is arranged on the observer side (+ Z side) of the display unit 100 and covers the display unit 100.
The display unit 100 includes a display area 110 that serves as a display surface (screen) on which an image can be displayed, and a non-display area 120 that is located around the display area 110 and cannot display an image due to a frame member, wiring, an electrode unit, or the like. Have.
The display area 110 of the present embodiment has a substantially rectangular shape when viewed from the observer side (+ Z side). Further, the non-display area 120 is located at the same width so as to be adjacent to the outside of the display area 110 and surround its periphery (four sides) when viewed from the observer side (+ Z side).
The display unit 100 may be a plasma display device, a liquid crystal display device, an organic EL display device (organic LED display device), or the like, or may be a rear projection type display device.

In the present embodiment, the four display devices 10 (10A to 10D) are arranged adjacent to each other so that the display surface (observation side surface) of each display area 110 is located on one plane. Further, in each display device 10, the display surface thereof is perpendicular to the thickness direction (depth direction) of the array type display device 1.

In the display device 10 of the present embodiment, the optical member 200 and the display unit 100 are integrally joined by a bonding layer 300 (see FIG. 1B).
In the present embodiment, as an example, the bonding layer 300 is provided only on the observer side of the non-display area 120, and the air layer 400 is provided between the display area 110 and the optical member 200. In this case, there are no particular restrictions on the refractive index and light transmittance of the bonding layer 300. Further, in this case, the bonding layer 300 may be formed of an adhesive or an adhesive, or an adhesive tape having adhesiveness on both sides may be used. Further, the optical member 200 and the display unit 100 may be supported around the optical member 200 and the display unit 100 by a support member (not shown) without the joint layer 300, and may be integrally fixed.
Further, the present invention is not limited to this, and for example, the bonding layer 300 may be formed on the entire surface of the non-display area 120 and the display area 110 on the observer side. In this case, the bonding layer 300 is formed of an adhesive or an adhesive, has high light transmittance, has the same refractive index as the optical member 200 (or is small enough to be regarded as having no difference in refractive index), and is optically equivalent. Is preferable.

The optical member 200 is a transparent sheet-like member arranged on the observer side (+ Z side) of the display unit 100.
The optical member 200 is arranged so as to correspond to each display unit 100 in each display device 10. Further, when viewed from the front direction of the screen of the array type display device 1 (display device 10), the size of the optical member 200 matches the size of the corresponding display unit 100, and the display unit 100 is on the observer side. Covered from.
As shown in FIG. 1 and the like, two optical members 200 are arranged vertically and horizontally (in the vertical and horizontal directions of the screen and the horizontal direction of the screen of the array type display device 1 in the used state), for a total of four members. , Each side is in contact at the adjacent portion.

As shown in FIG. 2, the optical member 200 has a translucent region 210 which is a region corresponding to the display region 110 of the display unit 100 and a non-transmissive region 210 when viewed from a direction (+ Z side) orthogonal to the sheet surface of the optical member 200. It has a reflection area 220 which is an area corresponding to the display area 120. In the present embodiment, the reflection region 220 is located so as to surround the outside of the light transmission region 210.
In the reflection region 220, a reflection layer portion 230 is provided near the surface on the observer side (+ Z side) in the thickness direction of the optical member 200.
The portion on the display unit 100 side of the reflection layer portion 230 and the light transmissive region 210 are the main body portion 240. Further, a surface layer 250 is provided on the outermost surface of the optical member 200 on the observer side.

The main body portion 240 is a sheet-like member having high light transmission, and a plurality of unit optical shapes 231 are arranged in a region corresponding to the reflection layer portion 230.
The unit optical shape 231 is a substantially triangular column shape that is convex toward the observer side, and the unit optical shape 231 is provided in the longitudinal direction of the reflection region 220 provided with the unit optical shape 231 (when viewed from the observer side, the unit optical shape 231 is provided). The direction parallel to the non-display region 120 to which the reflection region 220 corresponds is the longitudinal direction, and the width direction of the reflection region 220 provided with the unit optical shape 231 (the unit optical shape 231 when viewed from the observer side). A plurality of reflection regions 220 provided with the above are arranged along the width direction of the corresponding non-display region 120).
As shown in FIG. 3B, the unit optical shape 231 has a substantially triangular cross-sectional shape parallel to the arrangement direction and the thickness direction of the optical member 200, and has a first surface 231a located inside and a first surface 231a. It has a second surface 231b that is a surface facing the surface 231a of the first surface and is located on the outer side.

In the cross section shown in FIG. 3B, the angle formed by the first surface 231a in the direction perpendicular to the sheet surface of the optical member 200 (Z direction) is θ. Further, the array pitch of the unit optical shape 231 is P.
In the present embodiment, the unit optical shapes 231 having the same shape are arranged along the arrangement direction thereof, and the angle θ and the arrangement pitch P are constant in the arrangement direction of the unit optical shapes 231.

The main body 240 is preferably formed by using, for example, a polycarbonate (PC) resin, an acrylic resin, a styrene resin, an olefin resin, glass, a ceramic, or the like. Further, the main body portion 240 can be formed by an injection molding method, a cast molding method, or the like using these materials, a cutting method for cutting a plate material formed of the above-mentioned materials, or the like.

The reflective layer portion 230 is a portion formed with a plurality of reflective layers 232 having a function of reflecting at least a part of the incident light. In the present embodiment, the reflective layer portion 230 is located at the upper and lower end portions, the left and right end portions, and the corner portions of the optical member 200 when the optical member 200 is viewed from the front direction on the observer side.
Further, in the present embodiment, the width of the reflective layer portion 230 is the same as the width of the non-display area 120 when viewed from the front direction. However, the present invention is not limited to this, and the width of the reflective layer portion 230 may be slightly larger than the width of the non-display region 120, that is, a part of the inside of the reflective layer portion 230 may be applied to the display region 110. That is, it is preferable that the reflective layer portion 230 covers at least the non-display region 120.

The reflection layer 232 is a layer that reflects at least a part of the incident light.
The reflective layer 232 extends in a direction parallel to the inner peripheral edge (periphery on the display area 110 side) of the non-display region 120 to which the reflective region 220 provided on the reflective layer 232 corresponds as a longitudinal direction, and extends from the inner peripheral edge thereof. A plurality of non-display areas 120 are arranged in the direction toward the outer peripheral edge side. Therefore, the longitudinal direction of the reflective layer 232 is the longitudinal direction of the reflective region 220 (reflective layer portion 230) provided with the reflective layer 232 (when viewed from the observer side, the reflective region 220 provided with the reflective layer 232). Is parallel to the corresponding non-display region 120 (longitudinal direction), and the arrangement direction is the width direction (the reflection when viewed from the observer side) of the reflection region 220 (reflection layer portion 230) provided with the reflection layer 232. The reflection region 220 provided with the layer 232 is parallel to the corresponding non-display region 120 (in the width direction).
Further, as shown in FIG. 3B, the reflective layer 232 has a cross section parallel to the arrangement direction thereof and the thickness direction of the optical member 200, and the inner end portion is on the display portion 100 side (−Z side). It is located and tilted so that the outer end is located on the observer side (+ Z side).

The reflective layer 232 of the present embodiment is formed along the first surface 231a of the unit optical shape 231 described above. Therefore, in a cross section parallel to the arrangement direction of the reflective layer 232 and the thickness direction of the optical member 200, the angle formed by the reflective layer 232 in the direction perpendicular to the sheet surface of the optical member 200 (Z direction) is θ, and the reflection is reflected. The arrangement pitch of the layer 232 is P, and the angle θ and the arrangement pitch P are constant in the arrangement direction of the reflection layer 232.
In the present embodiment, in FIG. 3 and the like, six reflective layers 232 are arranged, but the number of the reflective layers 232 arranged is not limited to this, and the number of the reflective layers 232 arranged is the non-display area 120. It may be appropriately selected according to the width (width of the reflection region 220), the angle θ of the reflection layer 232, and the like.

The reflective layer portion 230 corresponding to the non-display region 120 at the corner portion will be described.
In the present embodiment, as shown in FIG. 2A, the reflective layer portion 230 (the reflective layer portion 230 at the corner) corresponding to the non-display region 120 at the corner is the screen of the region where the reflective layer 232 is adjacent. It is formed so that the longitudinal direction forms an angle with respect to the reflective layer 232 whose longitudinal direction is the vertical direction and the reflective layer 232 whose longitudinal direction is the left-right direction of the screen. In the present embodiment, the corner reflective layer 232 has a direction of 45 ° with respect to the reflective layer 232 having the X direction as the longitudinal direction and 45 ° with respect to the reflective layer 232 having the Y direction as the longitudinal direction. It is in the longitudinal direction. This angle may be changed as appropriate.

Further, in the present embodiment, the reflection layer 232 at the corner portion forms an angle θ with respect to the direction (Z direction) perpendicular to the sheet surface of the optical member 200, and the display unit, like the reflection layer 232 in the other region. The end located on the 100 side (−Z side) is inclined so as to be located inside the end located on the observer side (+ Z side). Further, the arrangement pitch of the reflection layer 232 at the corner is P as in the other minutes, and therefore, the number of the reflection layers 232 at the corner is larger than that of other adjacent regions.

The reflective layer 232 is preferably a thin film formed of a metal having a high light reflectance, for example, aluminum, silver, nickel, or the like. Further, the reflection layer 232 is preferably a half mirror that reflects a part of the incident light and transmits a part of the incident light. The reflective layer 232 of the present embodiment is a half mirror formed by depositing aluminum.
The reflective layer 232 is not limited to this, and may be formed by, for example, sputtering a metal having high light reflectivity. Further, the reflective layer 232 may be formed by depositing a dielectric multilayer film or the like. Further, the reflective layer 232 may be in a form in which transmitted light is not generated instead of a half mirror.
Further, the reflective layer 232 may be formed of, for example, a low refractive index resin having a refractive index lower than that of the unit optical shape 231 or the surface layer 250 and having translucency, or may be formed by air. ..

The surface layer 250 is a layer that covers the surface of the optical member 200 on the observer side. The surface layer 250 is on the observer side (+ Z side) of the main body 240 so that the reflection region 220 having the concave-convex shape on which the unit optical shape 231 and the reflection layer 232 are formed and the light-transmitting region 210 are flush with each other. It is formed by being applied to. Therefore, in the reflection region 220, the display device side (−Z side) of the surface layer 250 is in a form of filling the unevenness of the unit optical shape 231.
The surface layer 250 is preferably formed of a material having high light transmittance, and preferably has no difference in refractive index from the above-mentioned main body 240 (or is small enough to be regarded as having no difference in refractive index). .. As the material of such a surface layer 250, the same material as that of the main body portion 240 described above is preferable. In this embodiment, the surface layer 250 is made of the same resin as the main body 240.
If the reflection region 220 and the translucent region 210 are flush with each other, the surface layer 250 is not limited to the entire surface of the optical member 200, but only the reflection region 220 (the observer side of the reflection layer 232 and the unit optical shape 231). ) May be provided.

FIG. 4 is a diagram showing a part of a cross section of the array type display device 1 of the first embodiment. In FIG. 4, the outer (−X side) end of the array type display device 1 is enlarged in a cross section cut parallel to the thickness direction of the array type display device 1 along the A1-A2 line shown in FIG. Is shown. Further, in order to facilitate understanding, the configuration of the display device 10 is shown in a simplified manner. In FIG. 4, the left side in the drawing is the outside, and the right side is the inside (center side of the screen).
Although FIG. 4 shows only the cross section of one of the four sides of the display unit 100 and the optical member 200, the other three sides have the same shape.

In the cross section shown in FIG. 4, the width of the non-display region 120 is W, and the dimension from the surface of the non-display region 120 in the thickness direction of the display device 10 to the end of the reflection layer portion 230 on the display portion 100 side (−Z side). Is D, the dimension D preferably satisfies W ≦ D ≦ 3 × W.
When the dimension D is D <W, the amount of light incident on the reflective layer portion 230 is small, and the non-display portion cannot be sufficiently inconspicuous. Further, when the dimension D is D> 3 × W, the thickness of the optical member 200 increases and the weight also increases, which is not preferable. Therefore, the dimension D preferably satisfies the above range.

Here, with reference to FIG. 4, the light (image light) emitted from the display area 110 of the display unit 100 and incident on the optical member 200 will be described.
The light L1 emitted from the central portion of the display area 110 to the front side (+ Z side) is incident on the optical member 200, transmitted through the optical member 200, and is emitted from the light transmitting area 210 in the front direction.
Further, at least a part of the light L2 that is obliquely emitted to the outside of the screen from the region outside the display region 110 (the region adjacent to the non-display region 120) S and is incident on the optical member 200 is incident on the reflection layer portion 230. Then, it is reflected by the reflective layer 232 and emitted in the front direction (+ Z side) or in the direction in which the angle formed with the front direction is small.
Therefore, when the display device 10 is observed from the front direction on the observer side (+ Z side), the image is also displayed in the reflection area 220 corresponding to the non-display area 120, and the image is displayed on the entire optical member 200. The non-display area 120 is less likely to be visually recognized.

In FIG. 4 and the above description, one end of the display device 10 in the left-right direction of the screen has been described as an example, but the other end facing the display device 10 and both ends in the vertical direction of the screen may also be used. Similarly, the non-display area 120 becomes difficult to see. Further, also in the corner portion, as described above, the light emitted to the outside is reflected by the reflection layer 232 and heads toward the front direction, so that the non-display area 120 of the corner portion is difficult to see.

Therefore, according to the present embodiment, even when the display devices 10 are arranged as the array type display device 1 to increase the screen size, the non-display area 120 between the display areas 110 (seam portion and joint portion between the display devices 10) ) Can be made difficult to see.
Further, this makes it possible to improve the continuity of the images between the display areas 110, and further improve the image quality of the array type display device 1.
Further, according to the present embodiment, the surface of the array type display device 1 on the observer side is flat and is not provided with a concavo-convex shape such as a lens shape, so that the design can be improved.

Further, according to the present embodiment, it is possible to use the display device 10 as a single unit including a pair of display units 100 and an optical member 200, and even in such a form, the non-display area 120 is visually recognized. The display device 10 is difficult and has a large image display area, and the immersive feeling in the image can be improved. As a form used by such a display device 10 alone, it can be applied to a smartphone, a tablet, or the like, and the design of these can be improved.
Further, according to the present embodiment, the width of the non-display area 120 can be secured without making the width of the gorge, so that the strength of the display device 10 can be maintained. Further, since the non-display area 120 is less likely to be visually recognized, the appearance of the display device 10 becomes a cleaner impression, and the design can be improved. Further, since the surface of the display device 10 on the observer side is flat and does not have an uneven shape such as a lens shape, the design can be improved.

(Second Embodiment)
FIG. 5 is a diagram illustrating the array type display device 2 of the second embodiment. FIG. 5A is an enlarged view of a part of the cross section of the array type display device 2, and the cross section of the array type display device 2 shown in FIG. 5A is shown in FIG. 4 of the first embodiment. It corresponds to the cross section of the array type display device 1 shown. FIG. 5 (b) shows an enlarged view of the reflective layer portion 230 in the cross section shown in FIG. 5 (a).
The array-type display device 2 of the second embodiment has the same embodiment as the array-type display device 1 of the first embodiment described above, except that the angle θ of the reflective layer 232 changes along the arrangement direction. Therefore, in the second embodiment, the same reference numerals or the same reference numerals are given to the parts that perform the same functions as those in the first embodiment, and duplicate description will be omitted as appropriate. Similarly, in the third to fifth embodiments to be described later, the same reference numerals or the same reference numerals are given to the parts that perform the same functions as those of the first embodiment described above, and redundant description will be given. Omitted as appropriate.

In the optical member 200 of the second embodiment, the angle θ formed by the reflective layer 232 in the direction perpendicular to the sheet surface of the optical member 200 (Z direction) increases from the inside to the outside in the arrangement direction. That is, the reflective layer 232 has a form in which the reflective layer portion 230 (reflective region 220) is inclined outward from the inside to the outside.
Similarly, with respect to the reflective layer 232 of the reflective layer portion 230 at the corner portion, the angle θ of the reflective layer 232 increases from the inside to the outside of the corner portion.

Here, with reference to FIG. 5, the light (image light) emitted from the display area 110 of the display unit 100 and incident on the optical member 200 will be described.
The light L1 emitted from the central portion of the display area 110 to the front side of the observer (+ Z side) is the same as that of the first embodiment described above.
At least a part of the light L3 emitted obliquely to the outside of the screen from the outer peripheral side region (region adjacent to the non-display region 120) S of the display region 110 and incident on the optical member 200 is incident on the reflective layer portion 230. , Reflected by the reflective layer 232 and emitted in the front direction (+ Z side).
As a result, when the display unit 100 and the optical member 200 are observed from the front direction (+ Z side) on the observer side, the image is also displayed in the reflection area 220 corresponding to the non-display area 120, and the image is displayed on the entire optical member 200. The non-display area 120 is less likely to be visually recognized.

Further, at this time, as for the light reflected by the reflection layer 232 and heading toward the front, the light incident on the outer reflection layer 232 is more incident on the reflection layer 232 than the light incident on the inner reflection layer 232. The angle formed with the direction orthogonal to the plate surface (Z direction) of the optical member 200 is large. The region S from which the light emitted obliquely from the display region 110 and incident on the reflective layer portion 230 is emitted is narrower than the width W of the non-display region 120. That is, in the reflection region 220, the image emitted from the region S adjacent to the non-display region 120 is enlarged and displayed.
At the other end of the display device 10 in the left-right direction of the screen, both ends in the vertical direction of the screen, and the corners, as described above, the light emitted to the outside is reflected by the reflection layer 232 and heads toward the front. It is enlarged and displayed in the reflection area 220 at the corner, and the non-display area 120 becomes difficult to see.

Therefore, according to the present embodiment, as in the first embodiment, the display device 10 and the array type display device 2 in which the non-display area 120 located at the peripheral edge of the display area 110 is difficult to see can be displayed. The design of the device 10 and the array type display device 2 can be improved.
Further, according to the present embodiment, the image of the display area 110 of the area S adjacent to the non-display area 120 is enlarged and displayed in the reflection area 220, so that the continuity of the image between the display areas 110 is maintained. Improve more.

(Third Embodiment)
FIG. 6 is a diagram showing a part of a cross section of the array type display device 3 of the third embodiment. The cross section of the array type display device 3 shown in FIG. 6 corresponds to the cross section of the array type display device 1 shown in FIG. 4 of the first embodiment.
The array-type display device 3 of the third embodiment has the same embodiment as the array-type display device 1 of the first embodiment described above, except that the shape of the reflection region 220 of the optical member 200 is different.

In the optical member 200 of the third embodiment, a plurality of unit lenses 261 are arranged on the observer side surface of the reflection region 220 located at both ends in the left-right direction of the screen. The unit lens 261 is not formed on the observer side surface of the reflection region 220 located at both ends in the vertical direction of the screen.
The unit lens 261 has a partial shape of a cylinder, and the arrangement direction and the longitudinal direction are equal to the arrangement direction and the longitudinal direction of the reflection layer 232. The unit lens 261 has an arcuate cross-sectional shape in a cross section parallel to the arrangement direction and the thickness direction of the optical member 200. That is, the optical member 200 of the present embodiment has a lenticular lens shape formed on the surface of the display device 10 on the observer side of the reflection regions 220 located at both ends in the left-right direction of the screen.

The width of the region where the unit lens 261 is formed is preferably at least the same as that of the reflective layer portion 230, and may be slightly larger than the width of the reflective layer portion 230. Further, the lens width, the arrangement pitch, the radius of curvature, etc. of the unit lens 261 may be appropriately set according to the desired optical performance and the like.
Further, in the reflective layer portion 230 (the reflective layer portion 230 of the corner portion) corresponding to the non-display region 120 of the corner portion, the unit lens 261 has a longitudinal direction and an arrangement direction thereof in the longitudinal direction of the reflective layer 232 of the corner portion. And are formed in a direction parallel to the arrangement direction.

The unit lens 261 may have a partial shape of an ellipse or a partial shape of an ellipse in a cross section parallel to the arrangement direction and the thickness direction of the optical member 200, or may be a polygonal shape such as a triangular shape. May be good. Further, the unit lens 261 has a circular, elliptical or polygonal shape when viewed from the front direction, and may be a lens array shape in which these are arranged along two directions. Further, a mat shape in which a fine uneven shape is formed may be provided on the surface of the optical member 200 on the observer side.

The unit lens 261 has, for example, a reflective region located at both ends in the left-right direction of the screen, such as a shaping mold that shapes the shape of the unit lens 261 on the observer side after applying the resin forming the surface layer 250. It may be formed by curing the resin while pressing it at a position corresponding to 220, or sheet-shaped members in which unit lenses 261 are arranged are placed on the reflection regions 220 located at both ends in the left-right direction of the screen. It may be provided by sticking them together.

Here, with reference to FIG. 6, the light (image light) emitted from the display area 110 of the display unit 100 and incident on the optical member 200 will be described.
The light L1 emitted to the front observer side (+ Z side) in the central portion of the display area 110 is the same as that of the first embodiment described above. Further, the light L4 emitted in the oblique direction at the central portion of the display region 110 or the like is incident on the optical member 200, transmitted through the optical member 200, and is emitted from the light transmitting region 210 in the oblique direction.
At least a part of the light L5 that is obliquely emitted to the outside of the screen from the outer peripheral side region of the display region 110 (the region adjacent to the non-display region 120) and is incident on the optical member 200 is incident on the reflective layer portion 230. It is reflected by the reflective layer 232 and heads toward the front direction (+ Z side) or a direction forming a small angle with respect to the front direction. Then, it is incident on the unit lens 261, and a part of the lens is appropriately diffused in the left-right direction of the screen and emitted, and a part of the lens is emitted in the front direction.
Since the unit lens 261 is not formed in the reflection regions 220 located at both ends in the vertical direction of the screen, the light reflected by the reflection layer 232 of the reflection layer portion 230 is mainly emitted in the front direction.

Therefore, when the display unit 100 and the optical member 200 are observed from the front direction (+ Z side) on the observer side, the image is visually recognized in the reflection area 220 corresponding to the non-display area 120, and the image is displayed on the entire optical member 200. The non-display area 120 is less likely to be visually recognized. Further, when observing from a direction (oblique direction) at an angle with the front direction in the left-right direction of the screen, the image is visually recognized in the reflection area 220 corresponding to the non-display area 120, and the non-display area 120 is difficult to be visually recognized. Become.
Further, also at both ends and corners of the display device 10 in the vertical direction of the screen, as described above, the light emitted to the outside is reflected by the reflection layer 232 and heads toward the front, and the non-display area 120 at the corners is visible. It becomes difficult to be done.

Further, in general, in a video display device, the viewing angle in the left-right direction of the screen is more important than the viewing angle in the up-down direction of the screen, and is often set wider. Along with this, the non-display areas 120 between the display areas 110 arranged in the left-right direction of the screen and the non-display areas 120 at both ends in the left-right direction of the screen are the non-display areas 120 between the display areas 110 arranged in the vertical direction of the screen. There is a desire to make it more positively less visible than 120. In this embodiment, it is possible to meet such a request.

Therefore, according to the present embodiment, as in the first embodiment, the display device 10 and the array type display device 3 in which the non-display area 120 located at the peripheral edge of the display area 110 is difficult to see can be used.
Further, according to the present embodiment, the unit lens 261 can diffuse the image light in the left-right direction of the screen, and the array-type display device 3 is formed from an oblique direction (a direction forming an angle with respect to the front direction in the left-right direction of the screen). It is possible to make it difficult to visually recognize the non-display area 120 even when observing.

(Fourth Embodiment)
FIG. 7 is a diagram showing a part of a cross section of the array type display device 4 of the fourth embodiment. The cross section of the array type display device 4 shown in FIG. 7 corresponds to the cross section of the array type display device 1 shown in FIG. 4 of the first embodiment.
The array-type display device 4 of the fourth embodiment has the same configuration as the array-type display device 1 of the first embodiment described above, except that the shape of the reflection layer 232 of the reflection layer portion 230 of the optical member 200 is different. ..

The reflective layer 232 of the fourth embodiment is curved so as to be convex inward in the arrangement direction (center side of the display area 110) in a cross section parallel to the arrangement direction and the thickness direction (Z direction) of the optical member 200. It has a shape. In the present embodiment, the radius of curvature of this curved shape is shown to be constant in the arrangement direction of the reflective layer 232, but the radius of curvature gradually or gradually increases toward the outside along the arrangement direction. May be.
At this time, the second surface 231b (the surface on the side where the reflection layer 232 is not formed) of the unit optical shape 231 may be a flat surface, or a convex curved surface having the same or different radius of curvature as the first surface 231a. However, the shape thereof is not particularly limited.

Here, with reference to FIG. 7, the light (image light) emitted from the display area 110 of the display unit 100 and incident on the optical member 200 will be described.
The light L1 emitted to the front observer side (+ Z side) in the central portion of the display area 110 and the light L4 emitted in the oblique direction in the central portion of the display area 110 are as described above.
At least a part of the light L6 that is obliquely emitted to the outside of the screen from the outer peripheral side region of the display region 110 (the region adjacent to the non-display region 120) and is incident on the optical member 200 is incident on the reflective layer portion 230. It is reflected by the reflective layer 232 and is appropriately diffused and emitted in the arrangement direction of the reflective layer 232, and a part of the light is emitted in the front direction.

Therefore, when the display unit 100 and the optical member 200 are observed from the front direction (+ Z side) on the observer side, the image is visually recognized in the reflection area 220 corresponding to the non-display area 120, and the image is displayed on the entire optical member 200. The non-display area 120 is less likely to be visually recognized. Further, even when the image is observed from an oblique direction, the image is visually recognized in the reflection area 220 corresponding to the non-display area 120, and the non-display area 120 is difficult to be visually recognized.
Further, also at both ends and corners of the display device 10 in the vertical direction of the screen, as described above, the light emitted to the outside is reflected and diffused by the reflection layer portion 230, making it difficult to visually recognize the non-display area 120.

Therefore, according to the present embodiment, as in the first embodiment, the display device 10 and the array type display device 4 in which the non-display area 120 located at the peripheral edge of the display area 110 is difficult to see can be used. Moreover, the design can be improved.
Further, according to the present embodiment, the curved shape of the reflective layer 232 allows the image light to be diffused, and is an array type from an oblique direction (a direction forming an angle in the horizontal direction of the screen or the vertical direction of the screen with respect to the front direction). Even when the display device 4 is observed, the non-display area 120 can be made difficult to see.

(Transformed form)
Not limited to each of the embodiments described above, various modifications and changes are possible, and these are also within the scope of the present invention.
(1) In each embodiment, the width of the reflective layer portion 230 may be larger than the width of the non-display area 120, and a part thereof may overlap on the display area 110 when viewed from the front direction.

(2) In each embodiment, the surface of the main body 240 on the observer side is made flat, a reflection layer 230 separate from the main body 240 is formed, and the reflection layer 220 is appropriately joined to the reflection region 220 of the main body 240. May be good. Further, in each embodiment, the reflective layer portion 230 may be formed so as to be convex toward the observer side (+ Z side) with respect to the observer side surface of the light transmissive region 210 of the main body portion 240.
Further, in each embodiment, the surface layer 250 may be formed of an adhesive, an adhesive or the like, and a protective sheet or the like for protecting the optical member 200 may be attached to the observer side of the surface layer 250.

(3) In each embodiment, the unit optical shapes 231 are arranged adjacent to each other in the arrangement direction, but the present invention is not limited to this, and the unit optical shapes 231 are arranged apart from each other in the arrangement direction. A flat portion may be formed between adjacent unit optical shapes 231.

(4) In each embodiment, the arrangement pitch of the reflective layer 232P may be changed along the arrangement direction thereof. With such a form, it is possible to make the non-display portion less visible more effectively.

(5) In each embodiment, the optical member 200 may be held by a holding portion 600 provided in the non-display area 120.
FIG. 8 is a diagram showing a part of a cross section of the array type display device 5 in a modified form. The cross section of the modified display device 5 shown in FIG. 8 corresponds to the cross section of the array display device 1 shown in FIG. 4 of the first embodiment.
The array-type display device 5 of this modified form is the array-type display device of the first embodiment, except that the display unit 100 includes a holding unit 600 for holding the optical member 200, except that the display unit 100 is different from the first embodiment described above. It has the same form as 1.

The display unit 100 includes a holding unit 600 for holding the optical member 200 in the non-display area 120.
In FIG. 8, the holding portion 600 is convex toward the optical member 200 side (+ Z side) at the outer end portions of the non-display area 120 located at both ends of the display unit 100 in the left-right direction of the screen and both ends in the vertical direction of the screen. The holding portion 600 holds the optical member 200 by engaging the concave portion (notch) provided in the optical member 20 with the convex portion 601 provided at the tip of the holding portion 600. ing.
The holding portion 600 is preferably provided in the non-display region 120 (that is, in the region corresponding to the reflection region 220 in which the reflection layer portion 230 is provided). By arranging the holding unit 600 in such a region on the display unit 100 side where the image light does not pass, the effect of making the non-display area 120 difficult to see by the reflective layer unit 230 makes it difficult to see the holding unit 600.

The shape, number, and the like of the holding portions 600 may be appropriately selected, and the attachment method to the non-display area 120 and the like may be appropriately selected.
Further, the holding portion 600 has been described with an example of a form in which the convex portion 601 and the concave portion (notch) of the optical member 20 are engaged with each other. The optical member 200 may be adhered and held by the adhesive layer shown in the drawing, and the mechanism and form for holding the optical member 200 may be appropriately selected.

The holding portion 600 may be the same color or a similar color to the non-display area 120, which is a dark color system such as black, or may be a different color. Further, the surface may be in a form having a function of reflecting at least a part of light.

With such a form, the optical member 200 can be firmly held by the holding portion 600, and the position of the optical member 200 can be determined and fixed, so that the deviation of the optical member 200 during use can be significantly suppressed.
Further, by adopting such a form, the holding portion 600 is arranged in the region where the image light does not pass as described above, and the holding portion 600 is more visually recognized by the effect of making it difficult to see the non-display area by the reflective layer 232. It can be made difficult.

(6) FIG. 9 is a diagram showing a deformed form of the reflective layer 232 at the corner. FIG. 9 shows a state in which the reflective layer portion 230 at the corner is viewed from the observer side.
In each embodiment, the arrangement direction, the longitudinal direction, and the like of the reflective layer 232 at the corner of the non-display area 120 may be appropriately selected and set.
For example, as shown in FIG. 9A, the reflective layer 232 at the corner may also have a form in which the reflective layer 232 of the reflective layer portions 230 at the upper and lower ends of the screen and the left and right edges of the screen extends.
Further, for example, as shown in FIG. 9B, the reflective layer 232 at the corner may have an arcuate shape that is convex outward when viewed from the front direction of the optical member 200.

(7) In each embodiment, an example is shown in which the side surface 280 of the optical member 200 is a flat surface perpendicular to the display surface (the surface on the observer side) of the display area 110, but the present invention is not limited to this, and the side surface 280 is a curved surface. It may be a shape formed by combining a plurality of planes or the like. Further, a reflective layer or the like may be formed on the side surface 280.
FIG. 10 is a diagram showing a modified form of the optical member 200.
For example, as shown in FIG. 10A, a reflective layer 700 capable of reflecting light may be formed on the side surface 280 of the optical member 200. With such a shape, the light incident on the side surface 280 is reflected, and a part of the light is transmitted between the reflection layers 232 of the reflection layer portion or a part of the light is reflected by the reflection layer 232 on the observer side. Since it emits light to, the non-display area (seam portion) 120 can be made difficult to see.
The reflective layer 700 may have a concave-convex shape on the side surface 280 side. In such a shape, the light incident on the side surface 280 is diffusely reflected, so that the amount of light reflected by the side surface 280 and emitted from the reflection layer portion is increased, and the non-display region (seam portion) 120 Can be made difficult to see.

Further, as shown in FIG. 10B, at least a part of the side surface 280 may be a slope 290, or a reflective layer 700 may be formed on the slope 290 and the side surface 280.
Further, as shown in FIG. 10C, the reflective layer 700 may be formed by forming the side surface 280 into a curved surface.
At this time, the bonding layer 300 may be formed as shown in FIGS. 10B and 10C to increase the degree of bonding between the optical member 200 and the display unit 100. Further, as described above, the reflective layer 700 may have an uneven shape on the surface on the side surface 280 side, or the side surface 280 or the slope 290 may have an uneven shape on the surface thereof.
With such a shape, the light emitted from the reflection layer portion can be increased by being reflected by the side surface 280 and the slope 290, and the non-display region (seam portion) 120 can be made difficult to see.

(8) In the array type display devices 1 to 4 of the first to fourth embodiments, the optical member 200 may be formed from one plate-shaped member. With such a shape, it becomes easier for the observer to recognize the display screen on which the image is displayed as one screen, and the continuity of the image can be further enhanced.

(9) FIG. 11 is a diagram illustrating a modified form of the array type display device.
In each embodiment, the array type display devices 1 to 4 show an example in which the display devices 10 including the display unit 100 and the optical member 200 are arranged in a plane, but the present invention is not limited to this, and for example, it is shown in FIG. As described above, the display devices may be arranged so that the display screens are at an angle with each other. With such a shape, the convenience and design of the array type display device can be enhanced, and an image display suitable for the application and environment can be displayed to the observer O.

(10) In each embodiment, an example is shown in which the display surface (surface on the observer side) of the display area 110 of the display unit 100 is flat, but the display screen is not limited to this, and the display screen is cylindrical or spherical. It may be curved like a shape. In such a form, the optical member 200 (particularly, the translucent region 210) may have a shape that follows the shape of the display surface of the display region 110 of the display unit 100.

(11) The optical member 200 may be in the form of containing a diffusing agent inside, or may be in the form of a matte surface having a fine uneven shape on the observer side surface, depending on the desired optical performance and the like. Further, a layer having various functions such as an antiglare layer, an antireflection layer, a hard coat layer, an antifouling layer, an antistatic layer, an ultraviolet absorbing layer, and a touch panel layer may be appropriately provided on the observer side of the optical member 200. good.

Although the present embodiment and the modified form can be used in combination as appropriate, detailed description thereof will be omitted. Moreover, the present invention is not limited to each of the embodiments described above.

1,2,3,4 Array type display device 10 Display device 100 Display unit 110 Display area 120 Non-display area 200 Optical member 210 Translucency area 220 Reflection area 230 Reflection layer part 231 Unit optical shape 232 Reflection layer 240 Main body 250 Surface layer

Claims (8)

An array type display device in which a plurality of display devices are arranged adjacent to each other.
The display device is
A display unit including a display area capable of displaying an image and a non-display area provided on the outer peripheral side of the display area along the peripheral edge of the display area and not displaying an image.
A sheet-shaped optical member provided on the observer side of the display unit, covering the display area and the non-display area, and having translucency.
With
The optical member is a region that covers at least the non-display region when viewed from the normal direction of the display region, and a plurality of reflective layers are arranged and provided on the observer side in the thickness direction of the optical member. ,
The reflective layer is
When viewed from the front direction of the display device, a direction parallel to the inner peripheral edge of the non-display area corresponding to the region provided with the reflective layer on the display area side extends as a longitudinal direction, and the inner peripheral edge extends from the inner peripheral edge. Arranged in the direction toward the outer peripheral edge of the hidden area,
In the cross section of the optical member parallel to the thickness direction of the optical member and the arrangement direction of the reflection layer, the end portion on the display portion side is located closer to the center side of the optical member than the end portion on the observer side. It is inclined, and the angle formed by the normal direction of the display area increases from the inner peripheral edge side to the outer peripheral edge side along the arrangement direction of the reflective layer.
An array type display device characterized by. In the array type display device according to claim 1,
The reflective layer is curved so as to be convex toward the inner peripheral edge in the array direction of the reflective layer in the cross section of the optical member parallel to the thickness direction of the optical member and the arrangement direction of the reflective layer. ,
An array type display device characterized by. In the array type display device according to claim 1 or 2.
The display area has a rectangular shape when viewed from the normal direction.
In the optical member, a plurality of unit lenses projecting toward the observer extend along the longitudinal direction of the reflective layer on a part of an area on the surface on the observer side that covers at least the plurality of the reflective layers. However, it must be arranged in a direction parallel to the arrangement direction of the reflective layer.
An array type display device characterized by. In the array type display device according to any one of claims 1 to 3.
The display device is provided with a holding portion for holding the optical member in at least a part of the non-display area.
An array type display device characterized by. A display unit including a display area capable of displaying an image and a non-display area provided on the outer peripheral side of the display area along the peripheral edge of the display area and not displaying an image.
A plate-shaped optical member provided on the observer side of the display unit, covering the display area and the non-display area, and having translucency.
Is a display device equipped with
The optical member is a region that covers at least the non-display region when viewed from the normal direction of the display region, and a plurality of reflective layers are arranged and provided on the observer side in the thickness direction of the optical member. ,
The reflective layer is
When viewed from the front direction of the display device, a direction parallel to the inner peripheral edge of the non-display area corresponding to the region provided with the reflective layer on the display area side extends as a longitudinal direction, and the inner peripheral edge extends from the inner peripheral edge. Arranged in the direction toward the outer peripheral edge of the hidden area,
In the cross section of the optical member parallel to the thickness direction of the optical member and the arrangement direction of the reflection layer, the end portion on the display portion side is located closer to the center side of the optical member than the end portion on the observer side. It is inclined, and the angle formed by the normal direction of the display area increases from the inner peripheral edge side to the outer peripheral edge side along the arrangement direction of the reflective layer.
A display device characterized by. In the display device according to claim 5,
The reflective layer is curved so as to be convex toward the inner peripheral edge in the array direction of the reflective layer in the cross section of the optical member parallel to the thickness direction of the optical member and the arrangement direction of the reflective layer. ,
A display device characterized by. In the display device according to claim 5 or 6.
The display area has a rectangular shape when viewed from the normal direction.
In the optical member, a plurality of unit lenses projecting toward the observer extend along the longitudinal direction of the reflective layer on a part of an area on the surface on the observer side that covers at least the plurality of the reflective layers. However, it must be arranged in a direction parallel to the arrangement direction of the reflective layer.
A display device characterized by. In the display device according to any one of claims 5 to 7.
The holding portion for holding the optical member is provided in at least a part of the non-display area.
A display device characterized by.

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