Display panel
The display panel design with a transparent resin sheet and convex portions addresses visibility and heat-induced deformation issues, enhancing visibility and stability.
Patent Information
- Application Number
- JP2021187010
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2021-11-17
- Publication Date
- 2026-01-21
- Estimated Expiration
- 2041-11-17
AI Technical Summary
Conventional decorative sheet and display devices experience reduced visibility due to gaps between the decorative sheet and the display device, which can lead to corner lifting and edge lifting caused by heat deformation of the transparent resin sheet.
A display panel design featuring a transparent resin sheet with a sheet body and convex portions that are integral and protruding towards the display surface, with specific dimensions to minimize heat-induced deformation and improve visibility.
The design effectively suppresses corner lifting and edge lifting, maintaining visibility and reducing heat-related deformation of the resin sheet.
Smart Images
Figure 0007803092000002 
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Figure 0007803092000004
Abstract
Description
[Technical Field]
[0001] To provide a display panel that transmits image light projected from a monitor from the rear side and displays the image on the front side, and that can suppress so-called corner lifting and edge lifting caused by heat generated from the monitor. [Background technology]
[0002] Conventionally, a "decorative sheet and display device" has been known in which a panel member is positioned between a display device and a decorative sheet, and the panel member has an opening (see paragraph
[0022] and Figures 1 to 3 of Patent Document 1). [Prior art documents] [Patent documents]
[0003] [Patent Document 1] Japanese Patent Publication No. 2020-34886 Summary of the Invention [Problem to be solved by the invention]
[0004] However, in the conventional "decorative sheet and display device" described above, a panel member is positioned between the display device and the decorative sheet, which creates a "gap" between the back surface of the decorative sheet and the display surface of the display device, resulting in reduced visibility. For this reason, it is conceivable that visibility can be improved by placing a transparent resin sheet in the "gap."
[0005] However, when the transmissive resin sheet is disposed, the transmissive resin sheet and the display surface of the display device come close to each other, and there is a risk that the transmissive resin sheet may be warped or deformed due to the influence of heat generated by the display device. When the transparent resin sheet deforms, gaps form between it and the decorative sheet, causing problems such as corner lifting and edge lifting. When corner lifting and edge lifting occur, there is a risk of "streaks" appearing around the image projected on the surface of the decorative sheet. Therefore, in order to solve the above-mentioned problems, the present invention focuses on the shape of the transparent resin sheet, making it possible to suppress so-called corner lifting and edge lifting caused by heat generated from the display device. [Means for solving the problem]
[0006] A display panel according to one aspect of the present invention comprises a decorative sheet that transmits image light projected from the display surface of a monitor from the back side to display the image on the front side; a monitor frame located between the monitor and the back side of the decorative sheet, the portion that overlaps with the display surface of the monitor being an opening and having a frame body that surrounds the opening; and a transparent resin sheet located between the frame body and the back side of the decorative sheet, wherein the portion of the transparent resin sheet located between the opening of the monitor frame and the back side of the decorative sheet and the portion of the monitor frame located between the frame body and the back side of the decorative sheet are integral with each other.
[0007] The transparent resin sheet is also characterized by having a sheet body located between the frame body, the opening, and the back side of the decorative sheet, and a transparent convex portion protruding from the sheet body through the opening toward the display surface. The transparent convex portion is characterized in that the protruding height from the sheet body is equal to or greater than the thickness of the frame body.
[0008] The protruding height is less than the thickness of the frame body plus the distance of the gap from the end face of the opening facing the display surface to the display surface. The decorative sheet is characterized by having a transparent layer adjacent to the transparent resin sheet, a concealing layer laminated on the transparent layer and concealing the display surface, and a pattern layer laminated on the concealing layer and having a pattern formed on its surface. [Effects of the Invention]
[0009] According to one aspect of the present invention, by improving the shape of the transparent resin sheet, it is possible to suppress so-called corner lifting and edge lifting caused by heat generated from the monitor. [Brief explanation of the drawings]
[0010] [Figure 1] 3 is a partial cross-sectional view of a first display panel according to the first embodiment. FIG. [Figure 2] FIG. 2 is a partially exploded cross-sectional view of FIG. [Figure 3] FIG. 2 is a diagram showing the layer structure of the decorative sheet of FIG. [Figure 4] 2A and 2B show the first transmissive resin sheet of FIG. 1, where FIG. 2A is a cross-sectional view and FIG. 2B is an explanatory view illustrating a manufacturing method thereof. [Figure 5] FIG. 2 is a partial front view of the decorative sheet of FIG. [Figure 6] FIG. 6 corresponds to FIG. 5 and shows a partial front view of the decorative sheet with the monitor turned off. [Figure 7] FIG. 6 corresponds to FIG. 5 and is a partial front view of the decorative sheet for explaining the state of corner lifting and edge lifting of the transparent resin sheet. [Figure 8] 10A and 10B are cross-sectional views of a second transmissive resin sheet according to a modified example of the transmissive resin sheet, and FIG. 10B is an exploded cross-sectional view thereof. [Figure 9] FIG. 10 is a partial cross-sectional view of a second display panel according to a second embodiment. [Figure 10] FIG. 10 is a partial cross-sectional view of a third display panel according to a third embodiment. [Figure 11] FIG. 10 is a partial cross-sectional view of a fourth display panel according to a fourth embodiment. [Figure 12] 10 is a partial cross-sectional view of a fifth panel according to Comparative Example 1. FIG. [Figure 13] FIG. 2 is a partial perspective view of the first transparent resin sheet of FIG. 1. DETAILED DESCRIPTION OF THE INVENTION
[0011] (About the embodiment) DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The drawings are schematic, and the relationship between thickness and planar dimensions, the thickness ratio of each layer, etc., differ from the actual ones. Furthermore, the embodiments shown below are merely examples of configurations for embodying the technical idea of the present invention, and the technical idea of the present invention does not specify the materials, shapes, structures, etc. of the components as described below. The technical idea of the present invention can be modified in various ways within the technical scope defined by the claims.
[0012] (First display panel 10) In FIG. 1, 10 denotes a first display panel, which transmits image light projected from a monitor 30 from the rear side and displays the image on the front side. As shown in FIG. 2, the first display panel 10 is roughly divided into the following members: The following members will be described later: (1) Decorative sheet 40 (2) Monitor frame 50 (3) First transparent resin sheet 60 (4) Fixing member 70 The above members are not limited to the members (1) to (4). For example, although not shown, the fixing member 70 may be omitted and the monitor 30 may be fixed directly to the wall 20.
[0013] (Monitor 30) The monitor 30 uses, for example, a liquid crystal display. Although a liquid crystal display (LCD) has been exemplified as the monitor 30, it is not limited to this and a cathode ray tube display (CRT), a plasma display (PDP), an electroluminescence display (ELD), or a field emission display (FED) may also be used. 2, the monitor 30 has (1) a display surface 31 and (2) a protruding edge 32. Note that the configuration of the monitor 30 is not limited to the above-described (1) and (2), and although not shown, it is also possible to omit the protruding edge 32, for example. The display surface 31 is located on the front surface of the monitor 30. The protruding edge 32 frames the periphery of the display surface 31 and protrudes forward.
[0014] (Fixing member 70) The fixing member 70 is made of, for example, metal, and fixes the rear side of the monitor 30 to the wall 20 as shown in FIGS. Although metal is used as an example of the fixing member 70, there is no particular restriction on the material to be used, and it can be selected appropriately depending on the required strength. For example, wood, plastic, etc. may be used, or a combination of these materials may be used.
[0015] (Decorative sheet 40) 1 and 2, the decorative sheet 40 is positioned in front of the display surface 31 of the monitor 30. The decorative sheet 40 transmits the image light projected from the display surface 31 from the rear side, and displays the image on the front side, as shown in FIG. As shown in FIG. 3, the decorative sheet 40 is formed by laminating the following layers in order. The next layer will be described later. (1) Transparent base material 41 (2) Hiding layer 42 (3) Picture layer 43 (4) Surface protective layer 44 The layers of the decorative sheet 40 are not limited to the above-mentioned (1) to (4), and although not shown, for example, the surface protection layer 44 may be omitted.
[0016] (50 monitor slots) As shown in Figures 1 and 2, the monitor frame 50 is located between the monitor 30 and the back side of the decorative sheet 40, and the part that overlaps with the display surface 31 of the monitor 30 is an opening 52, and it is provided with a frame body 51 that surrounds the opening 52. The frame 51 is made of, for example, sheet metal. Although a metal frame, i.e., a metal sheet, is used as the frame 51, the frame is not limited to metal, and there are no particular restrictions on the material used, and the material is appropriately selected depending on the required strength, and may be, for example, wood, plastic, or a combination of these materials. The opening 52 is a portion that overlaps with the display surface 31 of the monitor 30. The size of the opening 52 is approximately equal to the size of the display surface 31 of the monitor 30, and penetrates from the front to the back. Although the size of the opening 52 is set to be equal to the display surface 31 of the monitor 30, it is not limited to this, and it may be larger or smaller than the display surface 31 as long as it can transmit all or part of the image light projected from the monitor 30. The frame 51 is configured so that the opening 52 is located in front of the display surface 31 of the monitor 30, and a part of the frame 51 covers the front surface of the monitor 30. This is to create a structure in which, when a load is applied to the surface of the decorative sheet 40, the load is less likely to be applied to the display surface 31 of the monitor 30. Although the configuration is such that part of the frame body 51 covers the front surface of the monitor 30, it is not limited to this, and although not shown, it is also possible to adopt a configuration in which part of the frame body 51 is located on the top surface of the monitor 30 and the first transparent resin sheet 60 is located in front of the monitor 30. Even when this configuration is adopted, it is possible to achieve a structure in which load is less likely to be applied to the display surface 31 of the monitor 30.
[0017] (First transparent resin sheet 60) As shown in Figures 1 and 2, the first transparent resin sheet 60 is sandwiched between the frame body 51 and the back side of the decorative sheet 40, and allows the image light projected from the monitor 30 to pass through to the back side of the decorative sheet 40. The material of the first transparent resin sheet 60 may be, for example, acrylic, polycarbonate, polyethylene terephthalate, or polybutylene terephthalate. Acrylic, which has high transparency, is suitable as the material of the first transparent resin sheet 60. The first transparent resin sheet 60 may also be made of, for example, a translucent colored material. As shown in FIG. 4( a ), the first transparent resin sheet 60 includes (1) a first sheet main body 61 and (2) a first transparent convex portion 62 .
[0018] (First seat body 61) As shown in FIGS. 1, 2, 4(a) and 13, the first sheet body 61 is, for example, flat, and is positioned between the frame 51, the opening 52 and the rear surface side of the decorative sheet 40. The first sheet body 61 has a first part A, which is a part located between the opening 52 of the monitor frame 50 and the back side of the decorative sheet 40, and a second part B, which is another part located between the frame body 51 of the monitor frame 50 and the back side of the decorative sheet 40, and the first part A and the second part B are integral. The first portion A is continuous with the first transparent convex portion 62 (described later) in the thickness direction, and has approximately the same size as the first transparent convex portion 62. The second portion B is continuous with the first portion A in the planar direction, and extends from the end of the first transparent convex portion 62 in all directions, that is, in the height direction and left and right width directions of the first display panel 10. For example, if the first transparent resin sheet 60 were made up of only the first portion A, there is a risk that the first portion A would be deformed by the heat of the monitor 30. That is, when the monitor 30 is turned on and remains on, the display surface 31 heats up. The heat from the display surface 31 is radiated to the first transparent convex portions 62, which will be described later, causing the temperature of the first transparent convex portions 62 to rise. The heat from the first transparent convex portions 62 is transferred to the first portion A that is continuous with it, and there is a risk that the first portion A will warp and deform due to the heat. In contrast to this, by configuring the first sheet body 61 by adding the second portion B to the first portion A, the first transparent resin sheet 60 as a whole can be made into a structure that is less susceptible to the effects of heat. That is, since the second part B is larger than the first part A, is integral with the first part A, and is positioned between the frame body 51 of the monitor frame 50 and the rear surface of the decorative sheet 40, the phenomenon in which the first transparent resin sheet 60 warps and deforms due to the influence of heat from the monitor 30 can be reduced. For example, the four corners and end faces of the four sides of second part B are far away from first part A, so the temperature rise due to heat conduction is kept low compared to first part A, and since second part B is sandwiched between frame body 51 of monitor frame 50 and the back surface of decorative sheet 40, if it warps in a direction away from the back surface of decorative sheet 40, it will come into contact with frame body 51, limiting the amount of warping or preventing warping. Furthermore, since second part B is large and located far away from first part A, the corners and end faces of second part B can be expected to have a heat dissipation effect. Therefore, when the first sheet body 61 is composed of the first part A and the second part B, the overall deformation of the first sheet body 61 can be significantly reduced compared to when the first sheet body 61 is composed of only the first part A.
[0019] (First transparent convex portion 62) As shown in FIGS. 1, 2, 4(a) and 13, the first transparent convex portions 62 protrude from the surface of the first sheet main body 61 toward the display surface 31 through the openings 52. The size of the periphery of first transparent convex portion 62 is set to be equal to or smaller than the size of the inside of opening 52 of frame body 51, and is set to be approximately the same as the size of opening 52, for example. Furthermore, the protruding height of the first transparent convex portion 62 is set to be equal to or greater than the thickness of the frame body 51, i.e., the thickness of the metal plate. For example, if the thickness of the metal plate is assumed to be "2 mm", the protruding height of the first transparent convex portion 62 will be "2 mm" or greater. Since the protruding height is set to be equal to or greater than the thickness of the frame body 51, the tip of the first transparent convex portion 62 can be brought closer to the display surface 31 of the monitor 30, further improving visibility. More specifically, the protrusion height is set to be less than the thickness of the frame body 51 plus the distance of the "gap" from the end face of the first transparent convex portion 62 on the side of the opening 52 facing the display surface 31 to the display surface 31. For example, if the thickness of the metal plate is 2 mm and the "gap" is 2 mm, the added value is 4 mm. The distance less than the added value is, for example, 2.1 to 3.9 mm, and preferably 3.5 to 3.8 mm. If the protruding height is made to match the distance of the "gap," the tip of the first transparent convex portion 62 will come into contact with the display surface 31 of the monitor 30. Therefore, when a load is applied to the surface of the decorative sheet 40, the load may be more likely to act on the display surface 31 of the monitor 30 through the first transparent convex portion 62.
[0020] (Method for manufacturing the first transparent resin sheet 60) A method for manufacturing the first transparent resin sheet 60 will be described with reference to FIG. 4(b). The material of the first transmissive resin sheet 60 is a flat plate material shown by the dotted line in FIG. 4(b). The plate material is cut to leave the first transparent convex portions 62 and to form cut portions 63 surrounding the first transparent convex portions 62 on all four sides, thereby forming the first transparent resin sheet 60 having the first transparent convex portions 62 shown in FIG. 4(a) and FIG. According to this manufacturing method, no mold is required, and the product can be manufactured easily and inexpensively by cutting commercially available materials. Of course, the first transmissive resin sheet 60 may be formed using a mold.
[0021] (Transparent base material 41) The transparent substrate 41 serves as a support for the decorative sheet 40, and as shown in FIGS. 2 and 3, it is adjacent to the first transmissive resin sheet 60 and constitutes a "transparent layer." The transparent substrate 41 can be made of a wide range of transparent resins, but since it is affected by heat from the monitor 30, it is preferable to use a heat-resistant material such as "PET" (for example, 0.25 mmt).
[0022] (Hiding layer 42) As shown in FIG. 3, the concealing layer 42 is laminated on the transparent substrate 41 to conceal the display surface 31 of the monitor 30, and may be, for example, solid white.
[0023] (Picture layer 43) As shown in FIG. 3, the pattern layer 43 is laminated on the concealing layer 42, and has a pattern such as a "wood grain pattern" formed on the surface. Although a "wood grain pattern" is exemplified as the pattern of the pattern layer 43, the pattern is not limited to this and can be any pattern depending on the purpose of use, the user's preferences, etc. In addition to wood grain patterns, other common patterns include, for example, stone patterns and abstract patterns. The type of pattern is not limited to the types exemplified above and may be, for example, a full-surface solid print.
[0024] (Surface protective layer 44) As shown in FIG. 3, the surface protection layer 44 is laminated on the design layer 43 to protect the surface of the design layer 43.
[0025] (Installation method of the first display panel 10) The method of installing the first display panel 10 will be described with reference to FIGS. As shown in FIG. 1, the monitor 30 is fixed to the wall 20 via a fixing member 70. At this time, the lower end of the monitor frame 50 is placed on the floor 21. The first transparent convex portion 62 of the first transmissive resin sheet 60 is positioned in the opening 52 of the monitor frame 50 and fitted toward the display surface 31 of the monitor 30 . The first transparent resin sheet 60 is sandwiched between the rear surface of the decorative sheet 40 and the monitor frame 50. As shown in FIG. 1, there is a gap between the opposing surfaces of the frame body 51 of the monitor frame 50 and the first sheet main body 61 of the first transparent resin sheet 60, but the frame body 51 and the first sheet main body 61 may be brought into close contact with each other.
[0026] (Monitor 30 on / off) The display state of the decorative sheet 40 when the monitor 30 is in an on / off state will be described with reference to FIGS. When the monitor 30 is turned on, the light source lights up and an image is displayed on the display surface 31. The image passes through the first transparent resin sheet 60 and the decorative sheet 40, and various information such as the date and time, weather, and messages is displayed on the surface of the decorative sheet 40, as shown in Figure 5. When the monitor 30 is turned off, the light source is turned off and the image disappears from the display surface 31. Therefore, as shown in Figure 6, the image disappears from the surface of the decorative sheet 40, and only the pattern is visible.
[0027] (The effects of corner lift and edge lift) When the monitor 30 is turned on, heat is generated, and the heat is transferred to the first transparent convex portions 62 of the first transparent resin sheet 60, causing the first transparent resin sheet 60 to heat up. If the first transparent resin sheet 60 is heated for a long period of time, the resin may warp and become separated from the back surface side of the decorative sheet 40 . A "gap" occurs when the first transparent resin sheet 60 separates from the back surface of the decorative sheet 40. When a "gap" occurs, vague or intermittent white streaks may appear around the periphery of the image displayed on the front surface of the decorative sheet 40, as shown in FIG. This phenomenon is called corner lift X or edge lift Y caused by the first transmitting resin sheet 60 .
[0028] Here, "corner lift X" refers to the situation where the corners located at the four corners of the first sheet main body 61 lift in a direction away from the back surface of the decorative sheet 40, creating a gap between the decorative sheet 40. When a "gap" occurs, image light or external light does not pass through the first transmissive resin sheet 60 but enters directly onto the back surface of the decorative sheet 40, which can cause a phenomenon in which vague or intermittent white streaks are visible on the surface of the decorative sheet 40. Furthermore, "edge surface lift Y" refers to the occurrence of "gaps" due to the edge surfaces located on the four sides of the first sheet main body 61 lifting up in the same manner.
[0029] (Prevents corner and end lift) In the present invention, as explained above, the first sheet body 61 is formed by adding the second part B to the first part A, thereby making the first transparent resin sheet 60 as a whole a structure that is less susceptible to the effects of heat, thereby preventing or suppressing the occurrence of corner lifting and edge lifting.
[0030] (Modification of the transparent resin sheet) Next, a modified example of the first transmissive resin sheet 60 shown in FIG. 4 will be described with reference to FIGS. As shown in FIG. 8(a), the second transmissive resin sheet 100 is composed of a second sheet main body 101 and second transparent convex portions 102, similar to the first transmissive resin sheet 60 in FIG. During manufacturing, as shown in FIG. 8(b), the second sheet main body 101 and the second transparent convex portion 102 are manufactured separately. Thereafter, the second sheet main body 101 and the second transparent convex portion 102 are bonded to each other via the bonding portion 103, as shown in Fig. 8(a). For example, a transparent double-sided tape is used for the bonding portion 103, and the second sheet main body 101 and the second transparent convex portion 102 are bonded to each other. Although, for example, a transparent double-sided tape is used for the joint 103, this is not limiting and any material that is translucent may be used, for example, a semi-transparent double-sided tape, or a transparent or semi-transparent adhesive may be used for adhesion. As shown in FIG. 4, the second transmissive resin sheet 100 can be manufactured at low cost compared to when the first transmissive resin sheet 60 is cut. Furthermore, since there is a joint 103 between the second sheet main body 101 and the second transparent convex portion 102, light scattering may occur at the joint 103, and visibility may be inferior to that of the first transparent resin sheet 60.
[0031] (Features and Effects of the Embodiments Based on the Present Invention) The features of the embodiment of the present invention are as follows. (First feature) A first characteristic feature is that, as shown in Figures 1 and 2, the monitor frame 50 is positioned between the monitor 30 and the back side of the decorative sheet 40, and the portion that overlaps with the display surface 31 of the monitor 30 is an opening 52, and the monitor frame 50 has a frame body 51 that surrounds the opening 52, and a transparent resin sheet (e.g., a first transparent resin sheet 60) is positioned between the frame body 51 and the back side of the decorative sheet 40, and as shown in Figure 4, the portion of the transparent resin sheet (first transparent resin sheet 60) that is positioned between the opening 52 of the monitor frame 50 and the back side of the decorative sheet 40 (e.g., a first portion A) and the portion that is positioned between the frame body 51 of the monitor frame 50 and the back side of the decorative sheet 40 (e.g., a second portion B) are integral.
[0032] (Effect of the first feature) According to the first feature, by improving the shape of the transmissive resin sheet (first transmissive resin sheet 60), so-called corner lifting and edge lifting caused by heat generated from the monitor 30 can be suppressed.
[0033] (Second feature) The second characteristic feature, i.e., the transparent resin sheet (first transparent resin sheet 60), comprises, as shown in FIG. 4, a sheet body (e.g., first sheet body 61) located between the frame body 51 and the opening 52 and the back side of the decorative sheet 40, and a transparent convex portion (e.g., first transparent convex portion 62) protruding from the sheet body (first sheet body 61) through the opening 52 toward the display surface 31. (Effect of the second feature) According to the second feature, the transparent convex portion (first transparent convex portion 62) protrudes toward the display surface 31 of the monitor 30, thereby improving visibility. Furthermore, since visibility can be improved, there is an advantage that a monitor 30 with low brightness, low heat generation, and a relatively inexpensive monitor can be used. As a result, the use of a low-brightness monitor reduces heat generation and is also advantageous in preventing "corner lift" and the like.
[0034] (Third feature) The third characteristic is that the transparent convex portions (first transparent convex portions 62) protrude from the sheet main body (first sheet main body 61) to a height equal to or greater than the thickness of the frame body 51, as shown in FIG. (Effect of the third feature) According to the third feature, the decrease in visibility due to the influence of the thickness of the frame body 51 can be reduced.
[0035] (Fourth feature) The fourth characteristic, i.e., the protruding height, is less than the value obtained by adding the thickness of the frame body 51 to the distance of the gap from the end face of the opening 52 facing the display surface 31 to the display surface 31, as shown in FIG. 1, for example. (Effect of the fourth feature) According to the fourth feature, it is possible to reduce the decrease in visibility due to the influence of gaps. Furthermore, if the protruding height is made to match the distance of the "gap," the tip of the first transparent convex portion 62 will come into contact with the display surface 31 of the monitor 30. Therefore, when a load is applied to the surface of the decorative sheet 40, the load may be more likely to act on the display surface 31 of the monitor 30 through the first transparent convex portion 62.
[0036] (5th feature) The fifth characteristic feature, that is, the decorative sheet (decorative sheet 40), as shown in FIG. 3, has a transparent layer (e.g., transparent substrate 41) adjacent to the transparent resin sheet (first transparent resin sheet 60), a concealing layer 42 laminated on the transparent layer (transparent substrate 41) and concealing the display surface 31, and a pattern layer 43 laminated on the concealing layer 42 and having a pattern formed on its surface. (Effect of the fifth feature) According to the fifth feature, when the monitor 30 is turned on, the display surface 31 can be hidden by the concealing layer 42, and when the monitor 30 is turned off, the image on the image layer 43 can be seen.
[0037] (6th feature) The sixth feature is that the transparent convex portion (e.g., the second transparent convex portion 102) is formed separately from the transmissive resin sheet (e.g., the second transmissive resin sheet 100) and is bonded to the transmissive resin sheet (e.g., the second transmissive resin sheet 100), as shown in FIG. 8, for example. (Effect of the 6th feature) According to the sixth feature, a transmissive resin sheet (for example, the second transmissive resin sheet 100) having transparent convex portions (for example, the second transparent convex portions 102) can be manufactured simply and inexpensively. [Example]
[0038] Examples 1 to 4 and Comparative Example 1 will be described below with reference to Figures 1, 2, and 9 to 12. However, the present invention is not limited to Examples 1 to 4 below. Example 1 In Example 1, as shown in Figures 1 and 2, a monitor frame 50 is attached to a monitor 30, and a first transparent resin sheet 60 is positioned between the monitor frame 50 and the decorative sheet 40. The first transparent resin sheet 60 is made of acrylic, and as shown in Figure 4(a), it is composed of a first sheet main body 61 and a first transparent convex portion 62. The first sheet body 61 is flat and is positioned between the frame body 51 and the opening 52 and the rear surface side of the decorative sheet 40 . The first transparent convex portion 62 is protruded toward the display surface 31 of the monitor 30 through the opening 52 of the monitor frame 50, thereby producing the first display panel 10 of the first embodiment.
[0039] Example 2 Example 2 is the same as Example 1 except that the first sheet body 61 in FIG. 4(a) is replaced with the second transmissive resin sheet 100 in FIG. 8, and a second display panel 110 shown in FIG. 9 is produced. As shown in FIG. 9, there is a gap between the opposing surfaces of the frame body 51 of the monitor frame 50 and the second sheet main body 101 of the second transparent resin sheet 100, but the frame body 51 and the second sheet main body 101 may be brought into close contact with each other.
[0040] Example 3 Example 3 is the same as Example 1, except that the first sheet main body 61 in Figure 4(a) is changed to a flat third transmissive resin sheet 130 as shown in Figure 10, and a third display panel 120 shown in Figure 10 is produced. The third transparent resin sheet 130 differs from the first display panel 10 of Example 1 in that it does not have the first transparent convex portion 62 and is composed only of the first sheet main body 61. Therefore, without the first transparent convex portion 62, the opening 5 of the monitor frame 50 remains empty. As shown in FIG. 10, there is a gap between the opposing surfaces of the frame body 51 of the monitor frame 50 and the third transparent resin sheet 130, but the frame body 51 and the third transparent resin sheet 130 may be brought into close contact with each other.
[0041] Example 4 Example 4 is the same as Example 1 except that the first transmissive resin sheet 60 is changed from "acrylic" in Example 1 to "polycarbonate" and a fourth display panel 140 of Example 4 is produced as shown in FIG. As shown in FIG. 11, there is a gap between the opposing surfaces of the frame body 51 of the monitor frame 50 and the first sheet main body 61 of the first transparent resin sheet 60, but the frame body 51 and the first sheet main body 61 may be tightly attached to each other.
[0042] (Comparative Example 1) Comparative Example 1 is the same as Example 1 except that the first sheet body 61 in FIG. 4(a) is replaced with the fourth transmissive resin sheet 160 in FIG. 12, and a fifth display panel 150 of Comparative Example 1 is produced. The fourth transparent resin sheet 160 differs from the first display panel 10 of Example 1 in that it does not have the first sheet main body 61, but is composed only of the first transparent convex portions 62. Therefore, without the first sheet main body 61, the back surface of the decorative sheet 40 and the monitor frame 50 are in direct contact with each other.
[0043] (evaluation) The display panels of Examples 1 to 4 and Comparative Example 1 prepared above were evaluated and judged based on the following two points. (1) Evaluation method for corner lifting After storage at 40°C for 2000 hours, the occurrence of "corner lifting" was visually confirmed. The evaluation criteria for "corner lift" were "Good" when no "corner lift" occurred, and "Poor" when "corner lift" occurred. "Good" was considered pass, and "Poor" was considered fail. (2) Visibility evaluation method The monitor was turned on, and with letters or the like displayed on the surface of the decorative sheet, it was visually confirmed whether the letters or the like could be read through the decorative sheet. The criteria for judging "visibility" were as follows: "◎" indicates that the letters were clearly legible, "〇" indicates that the letters were not clearly legible, and "×" indicates that the letters were indecipherable. "◎" and "〇" were considered pass, and "×" was considered fail. The evaluation results are shown in Table 1 below. [Table 1]
[0044] (Results of "corner lift" judgment) As is clear from Table 1, the evaluation of "corner lift" was "good" for all Examples 1 to 4, and they passed. Example 4 did not have "corner lift," but "yellowing" was observed. It is presumed that the cause of the "yellowing" in Example 4 was that the material of the transparent resin sheet was changed from "acrylic" to "polycarbonate." Comparative Example 1 was marked "x" for "corner lift" and failed. The reason for the failure of Comparative Example 1 is presumed to be that the fourth transparent resin sheet 160 was positioned only within the opening 52 of the monitor frame 50. In other words, the fourth transparent resin sheet 160 of Comparative Example 1 is composed only of the fourth transparent resin sheet 160 corresponding to the first transparent convex portion 62 of Example 1. In other words, the reason for the failure of Comparative Example 1 is that it does not have a configuration corresponding to the first sheet main body 61 of Example 1.
[0045] ("Visibility" judgment result) As is clear from Table 1, in terms of the judgment of "visibility," Examples 1 to 4 and Comparative Example 1 were all rated "good" or "great", and therefore passed. The reason why Examples 1, 4 and Comparative Example 1 were given the "Excellent" rating is presumably because the transparent resin sheet and the display surface 31 of the monitor 30 are closer than in Examples 2 and 3. That is, it can be assumed that this is because in Example 1, the first transparent convex portions 62 of the first transmissive resin sheet 60 in FIG. Moreover, it can be assumed that this is because Example 4 uses the same first transmissive resin sheet 60 as Example 1, as shown in FIG. In the case of Comparative Example 1, it is presumed that this is because the fourth transmissive resin sheet 160 in FIG. 12 was fitted into the opening 52 of the monitor frame 50 and brought close to the display surface 31 of the monitor 30. On the other hand, in Examples 2 and 3, the letters were not clear but were still distinguishable, and the "visibility" was at an average level. It can be assumed that this is because in Example 2, second sheet main body 101 and second transparent convex portion 102 in FIGS. 8 and 9 are bonded via bonding portion 103. This is presumably because in the third embodiment, the third display panel 120 in FIG. 10 is positioned away from the display surface 31 of the monitor 30, with the opening 52 of the monitor frame 50 sandwiched between them. [Explanation of symbols]
[0046] 10 First display panel 20 Wall 21 beds 30 monitors 31 Display surface 32 Edge 40 decorative sheets 41 Transparent base material 42 Hidden Layer 43 Picture layer 44 Surface protective layer 50 monitor frames 51 Frame 52 Opening 60 First transparent resin sheet 61 First seat body 62 First transparent convex part 63 Cutting part X Sheet angle floating Y Sheet edge lift 70 Fixing member 100 Second transparent resin sheet 101 Second seat body A Part 1 B Second part 102 second transparent convex portion 103 Joint 110 Second display panel 120 Third display panel 130 Third transparent resin sheet 140 4th display panel 150 5th display panel 160 4th transparent resin sheet
Claims
1. a decorative sheet that transmits the image light projected from the monitor's display surface from the back side to display the image on the front side; a monitor frame positioned between the monitor and the rear surface of the decorative sheet, the portion of the monitor overlapping the display surface being an opening, the monitor frame having a frame body surrounding the opening; a transparent resin sheet positioned between the frame body and the back side of the decorative sheet, a portion of the transmissive resin sheet located between the opening of the monitor frame and the rear surface side of the decorative sheet and a portion of the transmissive resin sheet located between the frame body of the monitor frame and the rear surface side of the decorative sheet are integral with each other, The monitor is a display panel having a protruding edge surrounding the display surface.
2. The transparent resin sheet is a sheet body positioned between the frame body, the opening, and the back surface side of the decorative sheet; The display panel according to claim 1 , further comprising a transparent convex portion that protrudes from the sheet body through the opening toward the display surface.
3. A display panel as described in claim 2, characterized in that there is no interface between the sheet body and the transparent convex portion.
4. A display panel as described in claim 2 or claim 3, characterized in that the transparent resin sheet is a sheet in which the sheet body and the transparent convex portion are integrally formed.
5. A display panel described in any one of claims 2 to 4, characterized in that the sheet body and the transparent convex portion are formed from the same material.
6. 6. The display panel according to claim 2, wherein the transparent convex portion protrudes from the sheet body by a height equal to or greater than the thickness of the frame body.
7. The display panel according to claim 6, characterized in that the protruding height is less than the value obtained by adding the thickness of the frame body to the distance of the gap from the end face of the opening facing the display surface to the display surface.
8. The decorative sheet is The display panel according to any one of claims 1 to 7, characterized in that it comprises a transparent layer adjacent to the transparent resin sheet, a concealing layer laminated on the transparent layer and concealing the display surface, and a pattern layer laminated on the concealing layer and having a pattern formed on its surface.
9. A display panel described in any one of claims 1 to 8, characterized in that the protruding edge is in contact with the frame body.
10. A display panel described in any one of claims 1 to 9, characterized in that the portion located between the frame body and the back side of the decorative sheet is not in contact with the frame body.
11. Further comprising a fixing member, 11. The display panel according to claim 1, wherein the fixing member is in contact with only a portion of the rear surface of the monitor.