JP2010271552A - Display apparatus and electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display apparatus configured to satisfy not only reduction in thickness and weight thereof, but also, static-load resistance characteristics to a surface pressurizing force and dynamic-load resistance characteristics to a fall impact, that is, to achieve both the reduction in thickness and weight thereof and the rigidity; and to provide an electronic device including the display apparatus. <P>SOLUTION: The display apparatus includes: a display device; a top plate arranged on the opposite surface of the display screen of the display device; an intermediate buffer layer being combination of adhesive layers and a resin sheet, disposed in a gap between the display device and the top plate; and a glass top disposed on the display screen side of the display device. The top plate, the intermediate buffer layer, the display device and the glass top are integrally laminated in layers in a thickness direction. The glass top has an uneven thickness part where the outermost peripheral part in a planar direction is the thickest and the thickness becomes smaller as it comes closer to the center part in the planar direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a display device and an electronic device using the display device. In particular, the present invention relates to portable electronic devices such as portable communication terminal devices and portable information terminal devices.

  In recent years, the housing structure of portable electronic devices such as portable communication terminal devices and portable information terminal devices has not only been made thinner and lighter, but also with respect to static load resistance against surface pressure, drop impact force, etc. It is required to satisfy the dynamic load resistance characteristics. In particular, in a notebook personal computer terminal (hereinafter simply referred to as a notebook PC), it is an essential requirement to achieve both a reduction in thickness and weight and robustness.

  Here, a liquid crystal (Liquid Crystal Display) display panel (hereinafter simply referred to as an LCD panel) or an organic EL (Organic Electro Luminescence) made of a very fragile base material such as a glass plate is generally used for a display portion of a notebook PC. ) Display panels (hereinafter simply referred to as OEL panels) are frequently used. For this reason, in recent years, various proposals have been made regarding a housing structure that prevents the LCD panel or the OEL panel from being damaged even when a surface pressure or a drop impact force is applied.

  In particular, LCD panels or OEL panels used in notebook PCs have become very thin with respect to their areas, and it is the most effective means to take measures against the top panel of the LCD panel or OEL panel. For example, a special high-rigidity material is used to improve the top plate rigidity, and a complex cross-sectional shape is formed to increase the cross-sectional secondary moment of the top plate to increase the rigidity with a general material. Have been proposed.

  In addition, an elastic body is arranged in a frame shape along the outer edges of the front and back sides of the LCD panel to provide a substantially sealed space, and the LCD is provided with the elastic force of the elastic body and the air damper effect of the sealed space. Patent Document 1 discloses a structure that fixes a panel and reduces movement and deformation of the LCD panel due to vibration and impact. A display device described in Patent Document 1 is shown in FIG. An elastic material 903 is interposed between the liquid crystal panel 901 and the upper bottom wall portion 902a, and an elastic member 904 is interposed between the liquid crystal panel 901 and the lower bottom wall portion 902b. With this structure, even when an impact is received, the movement and deformation of the liquid crystal panel 901 can be minimized by the substantially sealed spaces 905a and 905b and the elastic members 903 and 904 disposed above and below the liquid crystal panel 901.

  Further, Patent Document 2 describes a structure in which an impact force is attenuated by sandwiching an LCD panel with a frame-shaped cushioning material. A display device described in Patent Document 2 is shown in FIG. Since the frame-shaped cushioning material 1002 is arranged on the upper surface of the LCD panel 1001, when an impact is applied from the upper surface of the LCD panel 1001, the frame-shaped cushioning material 1002 is deformed and converted into deformation energy. Therefore, impact energy to the liquid crystal display body is remarkably reduced, and damage to the liquid crystal display body can be prevented.

  Further, Patent Document 3 proposes a structure that attenuates impact force applied to the entire terminal by disposing buffer members at the four corners of the casing. A display device described in Patent Document 3 is shown in FIG. In a display device including an LCD panel, an impact cushioning material 1103 is provided between the housing 1101 and the protective members 1102 at the four corners. With this structure, since the protective member always collides and the impact force is buffered at the time of dropping, the display device can always be reliably protected.

JP-A-9-329777 JP-A-11-298157 JP 2000-15669 A

However, the structure using a special high-rigidity material for the top plate requires a gap of a certain amount or more to absorb the bending deformation of the top plate when an external force is applied between the top plate and the LCD panel. In order to reduce this gap, that is, to suppress bending deformation of the top plate, for example, when a highly rigid material such as stainless steel is used for the top plate, it is possible to reduce the thickness, but the density of stainless steel is 8000 kg / m ^3. Because it is large, it is impossible to reduce the weight.

  Furthermore, even in the case of a structure in which the cross-sectional shape of the top plate is a convex shape or a concave shape and the second moment of the cross section is increased, the step difference between the convex and concave portions is increased to obtain sufficient rigidity, for example, a magnesium alloy having a thickness of 0.5 mm. In this case, it is necessary to secure a step of about 4 mm, and it is possible to reduce the weight but not to reduce the thickness.

  Further, in Patent Document 1, it is necessary to provide a substantially sealed space by arranging an elastic body in a frame shape along the outer edges of the front side and the back side of the LCD panel. In Patent Document 2, it is necessary to sandwich the LCD panel with a frame-shaped cushioning material. In patent document 3, since it is necessary to arrange a buffer member at the four corners of the housing, none of them can achieve a reduction in thickness and weight.

  That is, in the above-described structure, there is a trade-off between thinning and weight reduction of the display device side housing and improvement in robustness.

[Object of the invention]
The present invention has been proposed in order to solve the problems of the related technology, and is not only thinner and lighter, but also has static load resistance against surface pressure and dynamic load against drop impact force. An object of the present invention is to provide a display device that satisfies the characteristics, that is, can achieve both a reduction in thickness and weight and robustness, and an electronic device including the display device.

  The present invention has been made in view of the above circumstances, and the display device of the present invention includes a display device, a top plate disposed on a surface opposite to the display surface of the display device, the display device, and the top plate. An intermediate buffer layer that is a combination of an adhesive layer and a resin sheet provided in the gap, and a glass top disposed on the display surface side of the display device, the top plate, the intermediate buffer layer, the display device, and the The glass top is laminated and integrated in a layered manner in the thickness direction, and the glass top has an uneven thickness portion where the outermost peripheral portion in the planar direction is the thickest and becomes thinner toward the central portion in the planar direction.

  According to the present invention, it is possible to achieve both reduction in thickness and weight and robustness.

It is a perspective view which shows the display apparatus of 1st embodiment by this invention. It is the expansion | deployment perspective view which showed the structure of the display device side housing | casing in the display apparatus of 1st embodiment by this invention. The structure of the display device side housing | casing in the display apparatus of 1st embodiment by this invention is shown, (a) is a perspective view after an assembly, (b) is AA arrow sectional drawing of (a), (c) ) Is a cross-sectional view taken along the line BB in FIG. It is sectional drawing which shows the display apparatus of 2nd embodiment by this invention. It is sectional drawing which shows the display apparatus of 3rd embodiment by this invention. It is sectional drawing which shows the display apparatus of 4th embodiment by this invention. It is a top view which shows an example of the resin sheet used for the display apparatus of 1st to 4th embodiment by this invention. It is sectional drawing which shows the display apparatus of 5th embodiment by this invention. 10 is a cross-sectional view showing a display device described in Patent Document 1. 10 is a cross-sectional view showing a display device described in Patent Document 2. FIG. 11 is a perspective view showing a display device described in Patent Document 3.

  FIG. 1 is a perspective view of the overall appearance of a terminal having a housing structure showing the configuration of a first embodiment of a display device according to the present invention. The display device according to the present embodiment includes an input interface side housing 202 having an input interface such as a keyboard 201 and a display device side housing 203 having a display device 101 such as an LCD panel or an OEL panel.

  2 and 3 are diagrams illustrating the display device-side casing 203 in FIG. 1 in detail. 2 is an exploded perspective view of the display device side housing 203, FIG. 3 (a) is an assembled perspective view, FIG. 3 (b) is an AA arrow sectional view, and FIG. 3 (c) is a BB arrow view. It is sectional drawing.

  As shown in FIG. 2, the display-side housing structure of a display device including a display device 101 such as an LCD panel or an OEL panel has a top plate 102, an intermediate buffer layer 105 comprising a resin sheet 103 and adhesive layers 104a and 104b. And the display device 101, the glass top 106, and the adhesive layer 107 that adheres the display device 101 and the glass top 106.

  In addition, as shown in FIGS. 2 and 3A, the display-side device housing structure has a top plate 102, an intermediate buffer layer 105, a display device 101, and a glass top 106, which are sequentially laminated in the thickness direction. Thus, a composite laminate structure is formed by integrating the adhesive layers 104a, 104b, and 107.

  Further, as shown in FIGS. 3B and 3C, the glass top 106 has an uneven thickness structure having an uneven thickness portion where the outermost peripheral portion is the thickest and becomes thinner toward the center portion.

  In the first embodiment of the present invention, an LCD panel or an OEL panel is described as an example of the display device 101. However, the display device 101 is not limited to this, and a display composed of a base material that is easily broken, such as an inorganic EL display. It may be a device. The uneven thickness processing of the glass top 106 is preferably performed by an etching method. However, the present invention is not limited to this, and may be performed by machining.

  A typical example of the size of the display device 101 is a 7-inch diagonal display surface. However, the display device 101 is not limited to this. The display screen diagonal of 2 to 22 inches generally used for portable electronic devices is not limited thereto. An inch-sized display device may be used.

  For the top plate 102, for example, a magnesium alloy can be used. However, the present invention is not limited to this. Stainless steel, aluminum material, alloy material using this as a main material, zinc material, alloy material using this as main material, titanium material, and alloy material using this as main material The same effect can be obtained even when using a metal material such as. In addition, PMMA (polymethyl methacrylate), PS (polystyrene), ABS (acrylonitrile butadiene styrene), PA (polyamide), PVC (polyvinyl chloride), PPS (poly phenylene sulfide), PBT (poly butylene terephthalate), and these It is also possible to use a synthetic resin material containing as a main component. However, in order to maximize the bending rigidity of the display device side housing 203, a metal material, particularly a light metal material such as a magnesium alloy or an aluminum alloy, is most suitable in consideration of weight reduction. An arbitrary thickness may be selected as the thickness of the top plate 102.

  For example, a polycarbonate resin (PC resin) can be used for the resin sheet 103 constituting the intermediate buffer layer 105. However, the present invention is not limited to this, and PMMA, PS, ABS, PA, PVC, PPS, PBT, and a synthetic resin material containing these as a main component can also be used, and the thickness can be arbitrarily selected.

  Further, for the adhesive layers 104a and 104b constituting the intermediate buffer layer 105 and the adhesive layer 107 for adhering the display device 101 and the glass top 106, for example, an acrylic adhesive material can be used.

  As the adhesive layer, a double-sided tape material, a thermosetting adhesive material, a thermoplastic adhesive material, a photocurable adhesive material, and a room temperature curable adhesive material that can adhere the top plate 102, the resin sheet 103, and the glass top 106 to each other. Etc. are preferable.

  However, the present invention is not limited to this, and any other material such as a synthetic adhesive and a synthetic adhesive may be used. These pressure-sensitive adhesive materials desirably have a Young's modulus after adhesion or adhesion of 10% or more of the Young's modulus of the resin sheet 103. At this time, the thickness of the adhesive layers 104 a and 104 b is desirably 20% or less of the thickness of the resin sheet 103.

  Further, the housing structure of the display device of this embodiment will be described in detail. The top plate 102 is made of a magnesium alloy as a base material, and is formed into a metal plate having an outer dimension of 120 mm in length, 200 mm in width, and 0.5 mm in thickness. It was formed into a mold shape.

  The intermediate buffer layer 105 is made of a polycarbonate resin (PC resin) as a base material, a resin sheet 103 whose outer dimensions are 100 mm long × 160 mm wide × 0.3 mm thick, and an adhesive based on an acrylic adhesive material. The transfer tape was formed from adhesive layers 104a and 104b having outer dimensions of 100 mm length × 160 mm width × 0.05 mm thickness.

  Further, as shown in FIGS. 3B and 3C, the glass top 106 is etched so that the surface on the side opposite to the display device 101 is thickest at the outermost peripheral part and gradually becomes thinner toward the central part. The outer shape was processed to the uneven thickness structure using the construction method. At this time, the thickest part of the glass top 106 was 0.8 mm in thickness, the thinnest part was 0.4 mm in thickness, and this uneven thickness part was formed in an area of 110 mm × 180 mm. In the present embodiment, the uneven thickness region is 110 mm × 180 mm, but is not limited to this, and it may be arranged in the same or more plane region as compared with the intermediate buffer layer 105. The length, width, and thickness of each member described above are not limited to the dimensions described above.

  As described above, in the first embodiment of the present invention, the top plate 102, the intermediate buffer layer 105, the display device 101, and the glass top 106 are laminated and integrated in layers in the thickness direction, and the glass top 106 is integrated. Are arranged on the display surface side of the display device, and have an uneven thickness portion where the outermost peripheral portion in the planar direction is the thickest and becomes thinner toward the central portion in the planar direction.

  That is, since the entire terminal has a composite laminated plate structure, the deformation amount of the entire terminal can be suppressed, and the display device 101 is sandwiched between the top plate 102 and the glass top 106 and there is no extra space. Therefore, the thickness can be reduced. In addition, when a concentrated (static) load is applied (especially when applied to the center), the glass top 106 is bent to suppress the display device 101 from being compressed between the top plate 102 and the glass top 106. When a drop impact load (acceleration load) is applied, the amount of deformation can be reduced because the weight is small.

  Therefore, troubles such as black spots / white spots of the display device 101 and cracks / chips of the glass substrate due to the load can be prevented. In other words, high rigidity can be achieved without increasing the thickness of the housing, static load resistance against surface pressure, dynamic load resistance against drop impact force, especially initial deformation suppression characteristics when maximum acceleration is applied. It can be improved, and it is possible to achieve both thinness and weight reduction and robustness.

  Next, a second embodiment will be described. FIG. 4 is a cross-sectional view showing the configuration of the second embodiment according to the present invention. 4 (a) and 4 (b) are views corresponding to the cross-sectional view taken along the arrow A-A and the cross-sectional view taken along the line A-B in FIG. 3 (b) according to the second embodiment of the present invention. is there. In the present embodiment, the glass top 406 is provided with an uneven thickness portion whose outermost peripheral portion is thickest on the surface facing the display device 101 and gradually becomes thinner toward the center portion. Other structures are the same as those of the first embodiment.

  In this embodiment, the space between the glass top and the display device can be further ensured by using the uneven thickness portion as the opposing surface of the display device. Therefore, in addition to the effect of the first embodiment, the display device is more easily bent when a concentrated (static) load is applied, so that the effect of suppressing the display device from being compressed between the top plate and the tempered glass top can be obtained. . Furthermore, since the flat portion is exposed on the surface layer, the display visibility is hardly impaired.

  Next, a third embodiment will be described. FIG. 5 is a cross-sectional view showing the configuration of the third embodiment of the present invention. FIGS. 5A and 5B are views corresponding to the cross-sectional view taken along the line AA and the cross-sectional view taken along the line A-B and FIG. 3C in the first embodiment according to the present invention. is there. As shown in FIGS. 5A and 5B, the outermost peripheral portion of the glass top 506 is formed on the surface opposite to the display device 101 so that the outermost peripheral portion is thickest and becomes thinner toward the central portion. And the thickness of the central part is changed in a rectangular shape. For example, the thicknesses of the outermost peripheral part and the central part are changed in a rectangular manner so that the thickest part is 0.8 mm and the thinnest part is 0.4 mm. Other structures are the same as those of the first embodiment.

  Next, a fourth embodiment will be described. FIG. 6 is a cross-sectional view showing the configuration of the fourth embodiment according to the present invention. 6 (a) and 6 (b) are views corresponding to the cross-sectional view taken along arrows AA and 3B and the cross-sectional view taken along arrows BB in FIG. 3 (b) according to the second embodiment of the present invention. is there. As shown in FIGS. 6A and 6B, the glass top 606 is formed on the surface facing the display device 101 so that the outermost peripheral portion is thickest and the outermost peripheral portion and the center are thinned rectangularly toward the central portion. The thickness of the part is changed rectangularly. Other structures are the same as those in the first embodiment.

  Here, in FIGS. 5A and 5B and FIGS. 6A and 6B, the glass top 106 has a two-stage uneven thickness structure having two types of thicknesses, but is not limited thereto. Instead of a thing, it is good also as a multi-stage uneven thickness structure with multiple types of thickness. At this time, the structure with an infinite variety of thicknesses and the glass top 106 shown in FIGS. 3B and 3C and FIGS. 4A and 4B have the thickest outermost part and are directed toward the center. Needless to say, the outer shape processed by the etching method so as to become thinner gradually becomes the same shape.

  Next, the resin sheet used in the first to fourth embodiments will be described. The resin sheet 103 is made of a uniform material on the entire surface, but is not limited thereto.

  FIGS. 7A and 7B are plan views showing other examples of the resin sheet used in the first to fourth embodiments. The difference from the resin sheet 103 used in the first to fourth embodiments described above is that it is composed of two or more types of materials. In this structure, layers having a large Young's modulus and a small loss coefficient and layers having a small Young's modulus and a large loss coefficient are alternately arranged in the plane direction.

  As the resin sheet 703 constituting the intermediate buffer layer 105, as shown in FIG. 7A, two kinds of materials having greatly different loss coefficients at 25 ° C. were used. Here, resin layers 701a, 701b, 701c based on polycarbonate resin (PC resin: loss coefficient tan δ = 0.1 to 0.2 at 25 ° C.) and vibration-proof rubber having a large loss coefficient at 25 ° C. Layers 702a, 702b, and 702c (loss factor tan δ at 25 ° C. = 0.7 to 0.8) were arranged in a plane direction so as to alternate toward the center.

  Here, when the intermediate buffer layer 105 having an external dimension of 100 mm in length, 160 mm in width, and 0.4 mm in thickness (including 0.05 mm in thickness of the adhesive layers 104a and 104b) is used, the shape of the resin sheet 703 is: The outermost resin layer 701a has a frame shape in which an outer dimension is 100 mm in length, 160 mm in width, and 0.3 mm in thickness on a sheet-like base material with holes of 80 mm in width and 128 mm in width.

  Next, an anti-vibration rubber layer 702a arranged inside the outermost resin layer 701a was formed by punching a hole of 64 mm in length and 102 mm in width on a sheet-like base material having an outside dimension of 80 mm × width 128 mm × thickness 0.3 mm. I made a picture frame. Next, the resin layer 701b disposed on the inner side was formed into a frame shape in which a hole of 44.8 mm × 71.7 mm in width was formed in a sheet-like base material having an outer dimension of 64 mm × width 102 mm × thickness 0.3 mm. Next, the anti-vibration rubber layer 702b disposed inside the resin layer 701b has a hole of 29.1 mm × 46.5 mm in a sheet-like base material having an outside dimension of 44.8 mm × width 71.7 mm × thickness 0.3 mm. A frame with an empty space. Next, the resin layer 701c disposed inside the anti-vibration rubber layer 702b has a hole of 17.4 mm × 27.8 mm in a sheet-like base material having an outside dimension of 29.1 mm × width 46.5 mm × thickness 0.3 mm. A frame with an empty space. Next, a vibration-proof rubber layer 702c disposed inside the resin layer 701c was a sheet-like base material having outer dimensions of 17.4 mm in length, 27.8 mm in width, and 0.3 mm in thickness.

  Here, the resin sheet 703 constituting the intermediate buffer layer 105 uses resin layers 701a to 701c made of polycarbonate resin (PC resin) having a thickness of 0.3 mm. However, the present invention is not limited to this, and PMMA is used. PS, ABS, PA, PVC, PPS, PBT, and synthetic resin materials containing these as main components can also be used. Further, the thickness may be arbitrarily selected. Further, the anti-vibration rubber layers 702a to 702c have a loss coefficient tan δ at 25 ° C. of 0.7 to 0.8, but the present invention is not limited to this and the tan δ is 0.5 or more. A resin having a high vibration effect can be selected. At this time, the thickness needs to be the same as the thickness of the resin layers 701a, 701b, and 701c to be combined.

  Moreover, in this embodiment, although the resin sheet 703 which comprises the intermediate | middle buffer layer 105 is formed in substantially frame shape as shown to Fig.7 (a), it is not limited to this. For example, as shown in a resin sheet 704 in FIG. 7B, resin layers 705a, 705b, and 705c and vibration-proof rubber layers 706a, 706b, and 706c are formed in a substantially elliptical shape so as to alternate toward the center. May be. Moreover, it is good also as a shape which combined these shapes.

  Furthermore, in this embodiment, resin layers 701a and 705a are disposed on the outermost peripheral portions of the resin sheets 703 and 704 constituting the intermediate buffer layer 105, and vibration-proof rubber layers 702a and 706a are disposed on the inner sides thereof. However, the present invention is not limited to this, and the anti-vibration rubber layers 702a and 706a may be disposed on the outermost peripheral portions of the resin sheets 703 and 704, and the resin layers 701a and 705a may be disposed on the inner sides thereof. The area ratio also improves the dynamic load resistance against drop impact force, etc., especially the effect of suppressing initial deformation when maximum acceleration is applied, and the residual vibration suppression effect when drop impact force is applied. Any value can be selected depending on which is expressed higher.

  Furthermore, in this embodiment, the resin sheets 703 and 704 constituting the intermediate buffer layer 105 include two types of resin layers 701a to 701c or one of 705a to 705c and one type of anti-vibration rubber layer 702a to 702c or one of 706a to 706c. However, the present invention is not limited to this, and a plurality of types of resin layers 701a to 701c or 705a to 705c and a plurality of types of vibration-proof rubber layers 702a to 702c or 706a to 706c may be arbitrarily combined. Is possible.

  Here, generally, the Young's modulus of the synthetic resin material typified by the polycarbonate resin used in the present embodiment is several hundred MPa to several tens GPa (500 MPa to 25 GPa). Therefore, it is possible to increase the rigidity without increasing the thickness of the display device side housing 203 according to the present embodiment, the static load characteristics against surface pressure, etc., the dynamic load characteristics against drop impact force, etc. It is possible to improve the initial deformation suppression characteristic when the maximum acceleration is applied. On the other hand, the loss coefficient tan δ at 25 ° C. is very small, about 0.2 or less, and the residual vibration suppressing effect when a drop impact force or the like is applied is low.

  On the other hand, a rubber material such as a vibration proof rubber generally having a high vibration proof (vibration damping) effect has a very large loss coefficient tan δ at 25 ° C. of 0.5 or more and 1.0 or more depending on the material. Therefore, the effect of suppressing the residual vibration when a drop impact force or the like is applied is high, but the Young's modulus is very small, from several hundred KPa to several tens MPa (250 KPa to 50 MPa). Therefore, it is possible to increase the rigidity without increasing the thickness of the display device side housing 203, and the static load characteristics against surface pressure and the like, the dynamic load characteristics against the drop impact force and the like, especially when the maximum acceleration is applied. The effect of improving the initial deformation suppressing property cannot be effectively exhibited.

  That is, as in the present embodiment, the resin sheets 703 and 704 constituting the intermediate buffer layer 105 are made of a resin made of polycarbonate resin (PC resin) having a Young's modulus of 2.26 GPa and a loss coefficient tan δ at 25 ° C. of 0.1. By alternately arranging the layers 701a to 701c or 705a to 705c and the anti-vibration rubber layers 702a to 702c or 706a to 706c having a Young's modulus of 6300 KPa and a loss coefficient tan δ at 25 ° C. of 0.8 Further, the rigidity can be increased without increasing the thickness of the display device side housing 203, and the static load resistance against surface pressure and the dynamic load resistance against drop impact force can be improved. In particular, the effect of improving the initial deformation suppression characteristics when the maximum acceleration is applied can be effectively expressed, and the residual vibration suppression effect when a drop impact force or the like is applied can be highly expressed.

  Next, a fifth embodiment will be described. FIG. 8 is a cross-sectional view taken along the arrow showing the configuration of the fifth embodiment of the present invention. FIGS. 8A and 8B are views corresponding to the cross-sectional view taken along arrows AA and 3B and the cross-sectional view taken along arrows BB in FIG. 3B according to the first embodiment of the present invention. is there.

  As shown in FIGS. 8A and 8B, in the fifth embodiment, a transparent resin 801 is filled in the uneven thickness portion of the glass top 106. Other configurations are the same as those of the first embodiment.

  The transparent resin 801 uses PMMA, but is not limited to this, and other acrylic transparent resins, transparent ABS, and the like having a visible light transmittance of 80% or more are arbitrarily selected. Can do.

  For example, the thickest part of the glass top 106 is 0.8 mm, the thinnest part is 0.4 mm, and this uneven thickness part is completely filled with a transparent resin 801 having a visible light transmittance of 92% (here, PMMA is used). The overall thickness was made uniform at 0.8 mm.

According to the present embodiment, it is possible to minimize the distortion of the image of the display device 101 displayed through the glass top 106 having the uneven thickness structure.
In the fifth embodiment, the resin sheet 703 or 704 shown in FIGS. 7A and 7B may be used.

101: Display device 102: Top plates 103, 703, 704: Resin sheets 104a, 104b, 107: Adhesive layer 105: Intermediate buffer layers 106, 406, 506, 606: Glass top 107: Adhesive layer 201: Keyboard 202: Input interface Side housing 203: Display device side housings 701a, 701b, 701c, 705a, 705b, 705c: Resin layers 702a, 702b, 702c, 706a, 706b, 706c: Anti-vibration rubber layer 801: Transparent resin 901: Liquid crystal panel 902a: Upper low wall (first plate-like member)
902b: Lower low wall portion (second plate-like member)
903: Elastic member (first elastic member)
904: Elastic member (second elastic member)
905a, 905b: substantially sealed space 1001: LCD panel 1002: cushioning material 1101: casing 1102: protective member 1103: shock cushioning material

Claims (10)

A display device;
A top plate disposed on the opposite surface of the display surface of the display device;
An intermediate buffer layer that is a combination of an adhesive layer and a resin sheet provided in a gap between the display device and the top plate;
A glass top disposed on the display surface side of the display device,
The top plate, the intermediate buffer layer, the display device, and the glass top are laminated and integrated in a layered manner in the thickness direction,
In addition, the glass top has a thickened portion where the outermost peripheral portion in the planar direction is the thickest and becomes thinner toward the central portion in the planar direction. 2. The display device according to claim 1, wherein the uneven thickness portion is disposed in the same or a larger planar area than the intermediate buffer layer. The display device according to claim 1, wherein the thickness of the uneven thickness portion continuously changes from an outermost peripheral portion of the glass top toward a central portion. 3. The display device according to claim 1, wherein the thickness of the uneven thickness portion changes in a substantially step shape from an outermost peripheral portion of the glass top toward a central portion. 4. . The resin sheet constituting the intermediate buffer layer is composed of two or more types of resin materials, a layer having a large Young's modulus and a small loss coefficient, and a layer having a small Young's modulus and a large loss coefficient compared to the layer. The display device according to claim 1, wherein the display device has a structure in which the surfaces are alternately arranged in a planar direction. 6. The uneven thickness portion is filled with a transparent resin, and the thickness of the outermost peripheral portion in the planar direction and the central portion in the planar direction of the glass top is made uniform. The display device according to item. The display device according to claim 6, wherein the transparent resin is a resin having a visible light transmittance of 80% or more. The display apparatus according to claim 1, wherein the uneven thickness portion is opposed to the display device. 8. The display device according to claim 1, wherein the uneven thickness portion faces a surface opposite to the display device. An electronic device comprising the display device according to any one of claims 1 to 9.

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