Patent Application
20160370641
The disclosure relates to a display device such as a television receiver, a monitor, and a portable device.
In display devices such at television sets and monitors, for purposes of size and weight reduction, a proposal has been made to attach a cover film to a front surface of a display cell, allowing the cover film to support the display cell (for example, refer to Patent Literature 1). A frame-shaped surrounding member (a protection member) may be provided around the display cell. A back chassis may be disposed behind the display cell. The cover film may be attached from the front surface of the display cell to a rear surface of the back chassis through the surrounding member.
Patent Literature 1: JP 2013-190576A
The use of such a cover film may involve possibilities of occurrence of deformities such as a level difference in a margin between the display cell and the surrounding member, and there has been still room for improvement.
It is therefore desirable to provide a display device that makes it possible to reduce deformities such as a level difference that occur in a margin between a display cell and a surrounding member when a cover film is attached to a front surface of the display cell.
A display device according to an embodiment of the disclosure includes component (A) to (E) as follows.
In the display device according to the embodiment of the disclosure, the relay member is provided behind the display cell, facing the margin between the display cell and the surrounding member. The adhesive layer is provided between the relay member and the display cell, and between the relay member and the surrounding member. Accordingly, in the margin between the display cell and the surrounding member, the cover film is backed and reinforced with the relay member and the adhesive layer. Thus, deformities such as a level difference are reduced.
According to the display device according to the embodiment of the disclosure, the relay member is provided behind the display cell, facing the margin between the display cell and the surrounding member. The adhesive layer is provided between the relay member and the display cell, and between the relay member and the surrounding member. Hence, it is possible to reduce deformities such as a level difference that occur in the margin between the display cell and the surrounding member.
It is to be noted that some effects described here are not necessarily limitative, and any of other effects described herein may be achieved.
In the following, some embodiments of the disclosure are described in detail with reference to the drawings. Note that description is made in the following order.
1. Example Embodiment (an example in which right and left sides of display cell are covered with extended parts of a cover film)
2. Modification Example 1 (an example in which a side surface of a surrounding member is shaped to form three sides of a rectangle with rounded corners)
3. Modification Example 2 (an example in which the side surface of the surrounding member is shaped to form two sides of a triangle)
4. Modification Example 3 (an example in which the right and the left sides and an upper side of the display cell are covered with the extended parts of the cover film)
5. Modification Example 4 (an example in which the upper side of the display cell is covered with the extended part of the cover film)
6. Modification Example 5 (an example in which, in the modification example 3, a corner of the surrounding member is covered with a concealment of the cover film)
7. Modification Example 6 (an example in which the display cell is curved in a rearward-protruded are shape)
8. Application Examples
Herein, viewed from front in front of the display panel 2, a horizontal direction (a rightward-leftward direction) is denoted as an X direction; a vertical direction (an upward-downward direction) is denoted as a Y direction; and a direction (a frontward-rearward direction, or a depthwise direction) orthogonal to the X direction and the Y direction is denoted as a Z direction.
In a front surface of the display panel 2, there may be provided a display region 2A and a frame region 2B (a rectangular frame-shaped region shaded in
The cover film 10 may include, for example, as illustrated in
The surface layer 11 may be made of, for example, TAC film. Moreover, the surface layer 11 may be provided with an anti-reflection coating layer (not illustrated). In the surface layer 11, a region corresponding to the frame region 2B may be subjected to black or dark-colored printing treatment, and may be shielded to prevent internal components from being seen through from outside. It is to be noted that in the surface layer 11, a region corresponding to the display region 2A may be transparent. The first adhesive layer 12 is adapted to bond the surface layer 11 and the main layer 13 together, and may be made of OCA (optical clear adhesive). The main layer 13 may be made of, for example, COC (cyclic olefin copolymer). The second adhesive layer 14 is adapted to bond the cover film 10 and the display cell 20 together, and may be made of OCA (optical clear adhesive).
The display cell 20 may include, for example, as illustrated in
The cover film 10 may be attached to the polarization plate 21 of the display cell 20, as denoted by an arrow A1 in
The surrounding member 30 as illustrated in
The surrounding member 30 may include, for example, as illustrated in
The relay member 40 and the adhesive layer 50 are adapted to fasten the display cell 20 and the surrounding member 30 together, and to enhance plurality of the front surface of the display panel 2. Moreover, the relay member 40 and the adhesive layer 50 may preferably have a buffer function of absorbing a difference between a linear expansion coefficient of the display cell 20 and a linear expansion coefficient of the surrounding member 30, reducing stress applied to the display cell 20, and reducing influences on image quality, e.g. display unevenness.
For this purpose, the relay member 40 may be preferable made of a material having a linear expansion coefficient close to a linear expansion coefficient of the display cell 20 (that may be mainly made of glass), specifically, one or more of a group consisting of glass, carbon, and a glass fiber. This makes it possible to restrain stress caused by a difference in expansion and contractions between the display cell 20 and the surrounding member 30 from being transmitted to the display cell 20, leading to reduction in the stress applied to the display cell 20.
Alternatively, the relay member 40 may preferably have a structure adapted to absorb the difference in expansion and contraction between the display cell 20 and the surrounding member 30. In one specific and preferred example, the relay member 40 may have a gap-including, extendable structure such as a honey-comb structure.
The adhesive layer 50 may be preferably made of, for example, an ultraviolet-curing resin (an UV resin). Moreover, the adhesive layer 50 may be preferably made of an elastic material. This makes it possible to allow the adhesive layer 50 to be deformed following expansion and contraction of the cover film 10, and to absorb the expansion and contraction of the cover film 10. Furthermore, by means of elastic deformation of the adhesive layer 50, it is also possible to absorb the difference in expansion and contraction between the display cell 20 and the surrounding member 30.
The adhesive layer 50 may preferably fill a recess R whose three sides are surrounded by a side surface of the display cell 20, a side surface of the surrounding member 30, and the cover film 10. This makes it possible to restrain more securely occurrence of deformities such as a level difference and wrinkle in the cover film 10 in the margin M between the display cell 20 and the surrounding member 30.
It is to be noted that, behind the relay member 40, a rear casing 60 and a backlight unit 70 may be provided. The rear casing 60 may include, for example, a back chassis 61 and a rear cover 62. The back chassis 61 may accommodate the backlight unit 70. The rear cover 62 may cover a rear surface of the back chassis 61. The back chassis 61 may be made of a metal plate such as aluminum (Al), and may be hooked on an attachment member 63, while being fixed to a rear surface of the backlight unit 70 by a screw 64. The attachment member 63 may be fixed to a rear surface of the relay member 40 by an adhesive layer (not illustrated). Between the attachment member 63 and the backlight unit 70, a cushion 65 may be disposed. The rear cover 62 may be made of a resin or a metal plate.
In one specific example, the extended part 10B of the cover film 10 may be guided to the rear side of the display cell 20, with the curve side surface 30C of the vertical member 30A serving as a guide surface, and may be coupled to the rear surface of the rear casing 60.
The extended part 10B may be preferably relatively movably coupled to the rear casing 60 by a movable coupling section 80. This makes it possible to allow the extended part 10B to be displaced following the expansion and contraction of the cover film 10. It is therefore possible to restrain the repetitive expansion and contraction of the cover film 10 from causing degradation in an appearance of the display panel 2 such as a wrinkle in the margin M between the display cell 20 and the surrounding member 30.
In one specific example, the movable coupling section 80 may include a screw 81 and a spring 82, for example, as illustrated in
It is to be noted that the screw 81 may be provided, for example, between a strip-shaped member 83 and the rear cover 62 of the rear casing 60, and may be screwed with the rear cover 62. The strip-shaped member 83 may be attached to an end of the extended part 10B. The spring 82 may be provided, for example, between a head of the screw 81 and the strip-shaped member 83. It is to be noted that the screw 81 may be provided between the strip-shaped member 83 and an attachment part (not illustrated) provided on the rear surface of the back chassis 61, and may be screwed with the attachment part. Moreover, the movable coupling section 80 is not limited to the configuration including the screw 81 and the spring 82, but may have other configurations as long as the movable coupling section 80 is adapted to apply tension to the extended part 10B.
The optical sheets 71 may include, for example, a diffusion sheet and a luminance-enhancement film. The reflection member 72 may be a frame-shaped member (a so-called middle chassis) adapted to support the optical sheets 71 and other components, and may be made of a resin having high reflectivity such as white-colored polycarbonate. The light guide plate 73 may be made of, for example, acryl (PMMA). The light sources 74 may include light emitting elements such as LEDs (Light Emitting Diodes). The reflection sheet 75 is adapted to allow light from the light sources 74 to be reflected toward the display cell 20, and may be made of, for example, a white-colored resin plate. The heat spreader 76 may be made of, for example, aluminum (Al).
The display device 1 may be assembled, for example, as follows. First, the backlight unit 70 and the display cell 20 may be accommodated in the rear casing 60. The surrounding member 30 may be disposed around the display cell 20. The front attachment part 10A of the cover film 10 may be attached to the display cell 20 and the surrounding member 30. The extended part 10B may be wrapped around the surrounding member 30 toward the rear side of the display cell 20. The end of the extended part 10B may be attached to the rear casing 60 with use of the movable coupling section 80. In this way, the display panel 2 may be formed. The stand 3 may be placed on an installment surface. The display panel 2 may be mounted on the stand 3, and may be fixed with, for example, a screw (not illustrated).
In the display device 1, the relay member 40 is provided behind the display cell 20, facing the margin M between the display cell 20 and the surrounding member 30. The adhesive layer 50 is provided between the relay member 40 and the display cell 20, and between the relay member 40 and the surrounding member 30. In this way, the display cell 20 and the surrounding member 30 are fastened together by the relay member 40 and the adhesive layer 50. This leads to reduction in deformities such as a level difference that occur in the margin M between the display cell 20 and the surrounding member 30. Moreover, the difference in the expansion and contraction between the display cell 20 and the surrounding member 30 is buffered by the relay member 40 and the adhesive layer 50. This causes a decrease in strength applied to the display cell 20, restraining influences on the image quality, e.g. display unevenness.
As described, in the example embodiment, the relay member 40 is provided behind the display cell 20, facing the margin M between the display cell 20 and the surrounding member 30. The adhesive layer 50 is provided between the relay member 40 and the display cell 20, and between the relay member 40 and the surrounding member 30. Hence, it is possible to reduce deformation such as a level difference that occur in the margin between the display cell 20 and the surrounding member 30.
It is to be noted that, in the forgoing example embodiment, description is given on a case in which the side surface 30C of the surrounding member 30 is a curved surface. However, the side surface 30C of the surrounding member 30 is not limited to a curved surface, but may have other shapes. For example, as illustrated in
Moreover, in the foregoing example embodiment, description is given on a case in which the extended parts 10B of the cover film 10 are wrapped around the right and the left sides of the display panel 2. However, as illustrated in
With the cover film 10 attached, as illustrated in
Alternatively, as illustrated in
Next, as illustrated in
Thus, all the extended parts 10B are folded. Thereafter, as illustrated in
In the modification example, each of the extended parts 10B may be provided with the concealment part 10D. The corner 30D of the surrounding member 30 may be covered with the concealment part 10D. Hence, it is possible to avoid exposure of the corner 30D of the surrounding member 30, attaining enhanced designability of the display device 1.
In the following, description is given on application examples of the display device according to the above-described example embodiment with reference to
The tablet computer 110 may include the cover film 10 that includes the extended parts on its four sides, as illustrated in
Similarly to the application example 1, the smart phone 120 may include the cover film 10 that includes the extended parts 10B on its four sides, as illustrated in
Although description has been made by giving the example embodiments as mentioned above, the contents of the technology are not limited to the above-mentioned example embodiments and may be modified in a variety of ways. For example, although the cover film 10 may be directly attached to the side surface 30C of the surrounding member 30, an auxiliary film may be interposed between them. Also, an additional optical functional film may further be attached to the cover film 10.
Moreover, for example, in the foregoing example embodiment, description has been given on specific configurations of the display device 1. However, the display device 1 is not limited to a display device that includes all the components as illustrated in the figures. Moreover, part of components may be replaced with another component or other components.
Furthermore, stacked structures, shapes, dimensions, materials or other properties of the cover film 10 as described in the forgoing example embodiments are not limited to as exemplified above, but other stacked structures, shapes, dimensions, and materials may be adopted.
In addition, the display cell 20 may be any other display cell than a liquid crystal cell, e.g. an organic EL (Electroluminescence) cell, an electrophoretic display cell, an inorganic EL cell, and an electrodeposition or electrochromic display cell.
It is to be noted that effects described herein are merely exemplified and not limitative, and effects of the disclosure may be other effects or may further include other effects.
The contents of the technology may have the following configurations.
(1)
A display device, including:
a display cell;
a surrounding member provided around the display cell;
a cover film provided on front side of the display cell and the surrounding member;
a relay member provided on rear side of the display cell and the surrounding member, and facing a margin between the display cell and the surrounding member; and
an adhesive layer provided between the display cell and relay member, and between the surrounding member and the relay member.
(2)
The display device according to (1),
wherein the relay member is made of one or more of a group consisting of glass, carbon, and glass fiber.
(3)
The display device according to (1) or (2),
wherein the adhesive layer is made of an elastic material.
(4)
The display device according to any one of (1) to (3),
wherein the relay member has a configuration adapted to absorb a difference in expansion and contraction between the display cell and the surrounding member.
(5)
The display device according to any one of (1) to (4),
wherein the adhesive layer fills a recess whose three sides are surrounded by a side surface of the display cell, a side surface of the surrounding member, and the cover film.
(6)
The display device according to any one of (1) to (5),
wherein the cover film includes a front attachment part and an extended part outside the front attachment part, the front attachment part being attached to the display cell and the surrounding member, and the extended part being extended along the surrounding member toward the rear side of the display cell.
(7)
The display device according to (6), further including:
a rear casing provided on the rear side of the display cell and the surrounding member; and
a movable coupling section adapted to relatively movably couple the extended part to the rear casing.
(9)
The display device according to (7),
wherein the movable coupling section includes:
a screw that couples the extended part to the rear casing; and
a spring that energizes the screw in a direction in which the extended part is pulled toward the rear side of the display cell.
(9)
The display device according to any one of (1) to (8),
wherein the display cell is curved in a rearward-protruded arc shape.
This application claims the benefit of Japanese Priority Patent Application JP 2013-264895 filed on Dec. 24, 2013 the entire contents of which are incorporated herein by reference.
It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and alterations may occur depending on design requirements and other factors insofar as they are within the scope of the appended claims or the equivalents thereof.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2013-264895 | Dec 2013 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2014/082931 | 12/12/2014 | WO | 00 |
