WO2022097720A1

WO2022097720A1 - Display device

Info

Publication number: WO2022097720A1
Application number: PCT/JP2021/040778
Authority: WO
Inventors: 康博荒木; 祐輔牧
Original assignee: 三菱電機株式会社
Priority date: 2020-11-05
Filing date: 2021-11-05
Publication date: 2022-05-12
Also published as: TW202219600A

Abstract

A display device (100) comprises a frame (21) for supporting a display panel (10). The frame (21) is provided with a fixing member (23) for fixing the display panel (10) to the frame (21). The frame (21) is provided with a protrusion (X1). The fixing member (23) has an engagement portion (K1) that engages with the protrusion (X1) of the frame (21).

Description

Display device

The present disclosure relates to a display device having a configuration in which a display panel is fixed to a frame.

The display device generally includes a resin or metal frame that supports the display panel. The frame may have an opening. The opening exists in the display area of the display panel for displaying an image. In the area around the display area, the display panel is fixed to the frame by a fixing member. The fixing member is a member having adhesiveness and cushioning property.

Patent Document 1 discloses a configuration in which a display panel is fixed to a middle frame by using double-sided tape as a fixing member (hereinafter, also referred to as "related configuration A").

Specifically, in the related configuration A, the double-sided tape is stored in the recess provided on the surface of the middle frame. The recess is provided at the intersection of the surfaces of the middle frame, which is the portion where the first double-sided tape and the second double-sided tape intersect. One of the first double-sided tape or the second double-sided tape is housed in the recess. Therefore, it is possible to absorb the step caused by the first double-sided tape overlapping with the second double-sided tape.

This makes it possible to prevent a gap from being generated at a position where the display panel is fixed to the frame without increasing the thickness of the display device. Therefore, foreign matter or the like generated between a plurality of members constituting the display device is suppressed from entering the inside of the display device.

Japanese Unexamined Patent Publication No. 2014-21166

In a configuration in which the display panel is fixed to the frame by a fixing member as in the related configuration A, the following problems occur when the position of the fixing member shifts. The defect is, for example, a decrease in the joint strength between the display panel and the frame.

Therefore, it is required to prevent the position of the fixing member for fixing the display panel to the frame from shifting.

The present disclosure has been made to solve such a problem, and an object of the present invention is to provide a display device capable of suppressing the position of a fixing member for fixing a display panel to a frame from being displaced. And.

In order to achieve the above object, the display device according to one aspect of the present disclosure includes a display panel for displaying an image and a frame for supporting the display panel, and the display panel is attached to the frame. A fixing member for fixing is provided, the display panel is fixed to the frame by the fixing member, the frame is provided with a protrusion, and the fixing member is the frame. It has an engaging portion that engages with the protrusion.

According to the present disclosure, the display device includes a frame that supports the display panel. The frame is provided with a fixing member for fixing the display panel to the frame. The frame is provided with protrusions. The fixing member has an engaging portion that engages with a protrusion on the frame.

This makes it possible to prevent the position of the fixing member for fixing the display panel to the frame from shifting.

It is an exploded perspective view of the display device which concerns on Embodiment 1. FIG. It is a top view of the display device which concerns on Embodiment 1. FIG. It is an enlarged view of the area R1 of FIG. It is sectional drawing of the display device along the line A1-A2 of FIG. It is a perspective view of a display panel. It is a top view of the display device which has the structure of the modification 1. FIG. It is an enlarged view of the region R2 of FIG. It is a top view which shows a part of the display device which has the structure of the modification 2. FIG. It is sectional drawing of the display device along the line B1-B2 of FIG. It is a top view which shows a part of the display device which has the structure of the modification 3. FIG. It is sectional drawing of the display device along the C1-C2 line of FIG.

Hereinafter, embodiments will be described with reference to the drawings. In the following drawings, the same components are designated by the same reference numerals. The components with the same reference numerals have the same or substantially the same functions.

The dimensions, materials, shapes, relative arrangements, etc. of the components exemplified in the embodiment may be appropriately changed depending on the configuration of the device, various conditions, and the like. In addition, the dimensions of the components in the figure may differ from the actual dimensions.

<Embodiment 1>
FIG. 1 is an exploded perspective view of the display device 100 according to the first embodiment. The display device 100 is, for example, a liquid crystal display device that displays an image using a liquid crystal display. The display device 100 is not limited to the liquid crystal display device, and may be a display device of another type. The display device 100 may be, for example, an organic EL display device using an organic EL (Electroluminescence) panel. In the following, the state in which a plurality of components of the display device 100 shown in FIG. 1 are assembled is also referred to as an “assembled state”.

In FIG. 1, the X direction, the Y direction, and the Z direction are orthogonal to each other. The X, Y, and Z directions shown in the figure below are also orthogonal to each other. In the following, the direction including the X direction and the direction opposite to the X direction (-X direction) is also referred to as "X-axis direction". Further, in the following, the direction including the Y direction and the direction opposite to the Y direction (−Y direction) is also referred to as “Y-axis direction”. Further, in the following, the direction including the Z direction and the direction opposite to the Z direction (−Z direction) is also referred to as “Z axis direction”.

Further, in the following, a plane including the X-axis direction and the Y-axis direction is also referred to as an “XY plane”. Further, in the following, a plane including the X-axis direction and the Z-axis direction is also referred to as an “XZ plane”. Further, in the following, a plane including the Y-axis direction and the Z-axis direction is also referred to as a “YZ plane”.

FIG. 2 is a plan view of the display device 100 according to the first embodiment. FIG. 2 shows an assembled state display device 100. In FIG. 2, in order to make the configuration of the planar light source device 20 easy to understand, the front housing 3 described later and the display panel 10 described later are not shown. That is, in FIG. 2, the planar light source device 20 is shown.

FIG. 3 is an enlarged view of the region R1 of FIG. FIG. 4 is a cross-sectional view of the display device 100 along the lines A1-A2 of FIG. In FIG. 4, the display panel 10 is shown by a dotted line in order to make it easier to see the configuration of the main part of the present configuration. Further, in FIG. 4, the front housing 3 is not shown in order to make it easier to see the configuration of the main part of the present configuration.

With reference to FIGS. 1, 2, 3 and 4, the display device 100 includes a front housing 3, a display panel 10, a planar light source device 20, and a circuit board 4.

In the following, the image displayed by the display device 100 is also referred to as a "display image". Further, in the following, the side of the display device 100 on which the user visually recognizes the displayed image is also referred to as a “visual recognition side” or a “front side”. The visual recognition side (front side) of the display device 100 is, for example, the side of the display device 100 on which a surface on which a display image is displayed is provided.

Further, in the following, the side opposite to the visual recognition side of the display device 100 is also referred to as a "rear side". Further, in the following, in the components included in the display device 100, the surface on which the displayed image is displayed is also referred to as a “viewing side surface”. Further, in the following, the surface of the display device 100 on the visual recognition side is also referred to as "the front surface of the display device 100".

Further, in the following, the surface on the visual side of the display panel 10 is also referred to as "the front surface of the display panel 10." Further, the surface of the display panel 10 opposite to the front surface is referred to as a back surface. Further, in the other constituent members, the surface on the visual recognition side is referred to as the front surface of the other constituent members. Further, the surface on the back surface side of the other constituent member is referred to as the back surface of the other constituent member.

The display panel 10 has a function of displaying an image. The display panel 10 has a display surface 10a as a front surface and a back surface 10b. The display surface 10a is a surface for displaying an image. The display surface 10a is a surface on the viewing side. Further, a circuit board 4 is connected to the display panel 10. The circuit board 4 is a board for controlling the display panel 10.

The front housing 3 is a member for covering the display surface 10a side of the display panel 10.

A touch panel (not shown) may be provided on the display surface 10a of the display panel 10. The touch panel has a screen. The touch panel accepts a touch operation on the screen. In this case, the touch panel transmits a position signal indicating a touch position on the screen to, for example, a control unit (not shown).

Further, the screen of the touch panel may be covered with a protective member (not shown) for protecting the touch panel. The protective member is made of, for example, a transparent material having translucency.

The details will be described later, but the planar light source device 20 includes the frame 21. The frame 21 supports the display panel 10. Further, although the details will be described later, the display panel 10 is fixed to the frame 21 by the fixing member 23.

Further, a cover (not shown) may be provided on the back surface of the planar light source device 20. The cover protects the circuit board 4 of the display panel 10.

Next, each of the above-mentioned members constituting the display device 100 will be described in more detail.

(Front housing)
The front housing 3 has an opening H3 for displaying an image. In the assembled display device 100, the front housing 3 covers the peripheral edge of the display surface 10a of the display panel 10.

The front housing 3 is made of metal or resin. The metal is, for example, aluminum, stainless steel, iron or the like. The resin is PC (Polycarbonate: Polycarbonate), ABS (Acrylonitrile Butadiene Style: Acrylonitrile butadiene styrene), or the like.

(Display panel)
FIG. 5 is a perspective view of the display panel 10. The display panel 10 is a liquid crystal display panel. The display panel 10 is not limited to the liquid crystal display panel. For example, when the display device 100 is an organic EL display device, the display panel 10 may be an organic EL panel. The liquid crystal display panel is a panel to which the birefringence of the liquid crystal material is applied.

The liquid crystal display panel includes a substrate 11 and a substrate 12. The substrate 11 is an insulating substrate such as glass. A CF (color filter), a light-shielding layer, a counter electrode, and the like are formed on the substrate 11.

The substrate 12 is an insulating substrate such as glass. A switching element, a pixel electrode, and the like are formed on the substrate 12. The switching element is a thin film transistor (TFT).

The display panel 10 further includes a spacer (not shown), a sealing material (not shown), a liquid crystal layer (not shown), an alignment film (not shown), and a polarizing plate (not shown). , The driving IC 13.

The substrate 11 and the substrate 12 are provided so as to face each other. The spacer is provided so as to generate a predetermined distance between the substrate 11 and the substrate 12. The sealing material is a member for bonding the substrate 11 and the substrate 12 to each other. The liquid crystal layer is sandwiched between the substrate 11 and the substrate 12. In the display panel 10, the area surrounded by the sealing material is the display area. The display area is an area for displaying an image.

The alignment film is a film for orienting the liquid crystal constituting the liquid crystal layer. The polarizing plate is provided on the outer surface of the substrate 11. The polarizing plate is also provided on the outer surface of the substrate 12.

The drive IC 13 is provided on the peripheral edge of the substrate 12. The drive IC 13 may be provided on a tape-shaped wiring material (TCP, COF, etc.) connected to the peripheral edge of the substrate 12.

(Surface light source device)
The planar light source device 20 includes a frame 21 and a rear housing 22. The frame 21 supports the display panel 10. The detailed configuration of the frame 21 and the rear housing 22 will be described later.

The planar light source device 20 irradiates light toward the back surface 10b of the display panel 10. The planar light source device 20 further includes a light source (not shown), an optical sheet 24, a light guide plate 25, and a reflective sheet 26.

The light source emits light. The light guide plate 25 guides the light emitted by the light source in a specific direction. The light guide plate 25 is a member for guiding light to the optical sheet 24. The light guide plate 25 has a side surface, an exit surface, and a counter-exit surface. The emission surface is a surface on which light is emitted. The rebounding surface is a surface of the light guide plate 25 opposite to the emitting surface. The light emitted by the light source is incident on the light guide plate 25 from the side surface of the light guide plate 25. Most of the light incident on the light guide plate 25 is emitted from the emission surface of the light guide plate 25 toward the display panel 10.

The optical sheet 24 is provided on the exit surface of the light guide plate 25. The optical sheet 24 controls the distribution and spread of the light emitted from the light guide plate 25. The reflective sheet 26 is a sheet that reflects light. The light emitted from the anti-emission surface of the light guide plate 25 is reflected by the reflective sheet 26 and is incident on the light guide plate 25 again. The frame 21 and the rear housing 22 hold the optical sheet 24, the light guide plate 25, and the reflective sheet 26.

(flame)
The frame 21 is provided with an opening H2 for passing the light emitted by the planar light source device 20. The opening H2 in the plan view corresponds to the display area of the display panel 10.

The shape of the frame 21 in a plan view is a closed loop shape. The frame 21 surrounds the display panel 10. The frame 21 is made of metal or resin. The metal is, for example, aluminum, stainless steel, iron or the like. The resin is PC, ABS, or the like.

(Rear housing)
The shape of the rear housing 22 is a box shape having a bottom and no lid. Further, the rear housing 22 positions and holds a light source (not shown) and a light source substrate (not shown). In order to conduct the heat emitted from the light source, the rear housing 22 is made of a metal having high thermal conductivity. The metal having high thermal conductivity is, for example, aluminum, an aluminum alloy, or the like. The rear housing 22 made of metal having high thermal conductivity efficiently dissipates heat from the light source of the light source substrate. This makes it possible to prevent heat from being trapped in the planar light source device 20.

The frame 21 and the rear housing 22 are fixed to each other by, for example, a hooking structure using claws, screwing, or the like. Therefore, the optical sheet 24, the light guide plate 25, and the reflective sheet 26 are held by the frame 21 and the rear housing 22. The frame 21 and the rear housing 22 may be integrated. Further, one of the frame 21 and the rear housing 22 may be provided on the outer periphery of the planar light source device 20.

(Fixing member)
The fixing member 23 is a member for fixing the display panel 10 to the frame 21. The fixing member 23 is a member having adhesiveness and cushioning property. The fixing member 23 is, for example, a double-sided tape having a cushioning property. The fixing member 23 is not limited to the double-sided tape. The fixing member 23 may be, for example, a solid adhesive member having a cushioning property.

The shape of the fixing member 23 is long. The shape of the fixing member 23 in a plan view is, for example, a rectangle, a rectangle, or the like. The shape of the fixing member 23 in a plan view is not limited to a rectangle, a rectangle, or the like. Further, the width of the fixing member 23 does not have to be constant in the longitudinal direction of the fixing member 23.

The fixing member 23 has a front surface and a back surface having adhesiveness. The front surface of the fixing member 23 is a surface facing the display panel 10. The back surface of the fixing member 23 is a surface to be attached to the protrusion 21x, which will be described later, included in the frame 21.

(light source)
The light source is a point light source, an LED, a fluorescent tube lamp or the like. The point light source emits RGB (three primary colors) light. RGB light includes red light, green light and blue light. When a point light source is used, a light source substrate on which the point light source is mounted is used. The light source substrate is constructed based on a general glass epoxy resin or polyimide resin.

In addition, in order to improve the heat dissipation of the light source substrate, the light source substrate may be configured based on a metal such as aluminum or ceramic. Further, when using a point light source, a flexible flat cable may be used. The LED emits light different from RGB light (for example, white light).

(Light guide plate)
The light guide plate 25 is made of a transparent material. The transparent material is acrylic resin, polycarbonate resin, glass, or the like. A light scattering portion is formed on one or both of the emission surface and the anti-emission surface of the light guide plate 25. The light scattering unit has a structure for emitting light from an emission surface and adjusting the intensity distribution of light in the surface, the emission direction of light, and the like. The light scattering unit is, for example, a scattering dot pattern. Further, the light scattering portion has, for example, a prism shape.

(Optical sheet)
As described above, the optical sheet 24 is provided on the exit surface of the light guide plate 25. The optical sheet 24 is a member for adjusting the intensity distribution of the emitted light, the emission angle of the light, and the like.

The optical sheet 24 is configured by using a required number of lens sheets, diffusion sheets, viewing angle adjustment sheets, etc. according to the purpose. The lens sheet is used for light collection. Diffusion sheets are used for light homogenization. The viewing angle adjusting sheet is used to adjust the brightness of light in the viewing angle direction.

(Circuit board)
The circuit board 4 controls the display panel 10, the light source, and the like by means of electrical input / output signals. The circuit board 4 is manufactured as follows. For example, a copper pattern is formed on glass epoxy or the like. Then, electronic components are mounted on the surface of the glass epoxy or the like by soldering. The circuit board 4 is mainly arranged and fixed on the back side (the side where light is not emitted) of the display device 100.

The circuit board 4 may be configured by mounting an electronic component on an FPC (Flexible Printed Circuit). The FPC has wiring formed on a base material on a film connected to the display panel 10.

Further, in order to protect the circuit board 4 from external pressure, static electricity, etc., a protective cover (not shown) may be attached to the circuit board 4. The protective cover is made of, for example, a metal or a thin film-like resin. The metal is aluminum, stainless steel, galvanized steel sheet, or the like. Further, the resin is PET (Polyethylene terephthalate) or the like.

When a metal protective cover is used, it is necessary to avoid electrical contact with the circuit board 4 and the electronic components on the circuit board 4. Therefore, it is desirable to attach a resin sheet such as PET to the circuit board 4 side and take insulation measures.

(Characteristic configuration)
Next, the characteristic configuration of the present embodiment will be described in detail. As described above, the planar light source device 20 includes a frame 21 and a rear housing 22. The frame 21 supports the display panel 10.

Here, the configuration in which the frame 21 supports the display panel 10 will be described in detail. The frame 21 has a protrusion 21x for supporting the display panel 10 (see FIGS. 2, 3 and 4). The protrusion 21x is a part of the frame 21.

The protrusion 21x protrudes toward the space inside the display device 100. The protrusion 21x extends in a direction along the display surface 10a of the display panel 10. That is, the protrusion 21x extends in a direction parallel to the display surface 10a of the display panel 10. The shape of the protrusion 21x is, for example, a plate.

As shown in FIGS. 2, 3 and 4, in a plan view, the protrusion 21x surrounds the opening H2. The protrusion 21x defines the opening H2 of the frame 21. In the following, a part of the frame 21 surrounding the opening H2 is also referred to as an “opening side portion”. The protrusion 21x is an opening side portion. The protrusion 21x has a surface 21a as a front surface.

As described above, the shape of the frame 21 in a plan view is a closed loop shape. Therefore, the shape of the protrusion 21x in a plan view is a closed loop shape. Therefore, the shape of the surface 21a in a plan view is a closed loop shape.

Further, a groove V5 is provided on the surface 21a of the protrusion 21x. That is, the protrusion 21x is provided with a groove V5. The shape of the groove V5 in a plan view is a closed loop shape.

The groove V5 of the protrusion 21x of the frame 21 accommodates four fixing members 23. Specifically, four fixing members 23 are attached to the bottom surface of the groove V5 of the protrusion 21x of the frame 21. That is, the frame 21 is provided with four fixing members 23. In the following, the surface to which the fixing member 23 is attached is also referred to as “surface 2s”. Therefore, the bottom surface of the groove V5 of the protrusion 21x is the surface 2s to which the fixing member 23 is attached.

The front surface of each fixing member 23 provided on the protrusion 21x of the frame 21 is attached to the back surface 10b of the display panel 10. As a result, the display panel 10 is fixed to the protrusion 21x of the frame 21 by each fixing member 23.

With the above configuration, the protrusion 21x of the frame 21 supports the display panel 10 via each fixing member 23. As described above, the fixing member 23 has a cushioning property. Therefore, by sandwiching the fixing member 23 between the protrusion 21x of the frame 21 and the display panel 10, it is possible to prevent a gap from being generated between the protrusion 21x of the frame 21 and the display panel 10. Therefore, it is possible to prevent foreign matter from entering the inside of the display device 100.

In the following, the four fixing members 23 provided on the frame 21 are also referred to as fixing

members

23a, 23b, 23c, 23d, respectively. That is, the groove V5 provided in the frame 21 accommodates the fixing

members

23a, 23b, 23c, 23d.

Each of the fixing

members

23a and 23c extends in the X-axis direction. Each of the fixing

members

23b and 23d extends in the Y-axis direction. For example, the fixing member 23a and the fixing member 23b are adjacent to each other. Further, for example, the fixing member 23b and the fixing member 23c are adjacent to each other.

The number of fixing members 23 provided on the frame 21 is not limited to 4, and may be 1, 2, 3, or 5 or more. In the following, the situation in which the fixing member 23 is attached to the frame 21 is also referred to as a “pasting situation”. 2 and 3 show the configuration of each member in the pasting situation.

Further, the shape of the contour of the protrusion 21x (opening side portion) in a plan view is a rectangle (hereinafter, also referred to as “rectangular Rt”). Therefore, the protrusion 21x has a corner portion. The corner portion of the protrusion 21x is a portion of the protrusion 21x corresponding to the corner portion of the rectangular Rt. The corner portion of the protrusion 21x is close to the opening H2. In the following, the corner portion of the protrusion 21x is also referred to as an “opening proximity corner portion”.

Further, the protrusion 21x (opening side portion) of the frame 21 has a non-corner portion. The non-corner portion is a portion included in the protrusion 21x and different from the corner portion (opening proximity corner portion).

Further, the frame 21 is provided with a protrusion X1. Specifically, the protrusion X1 is provided on each of the corner portion of the protrusion 21x of the frame 21 and the non-corner portion of the protrusion 21x of the frame 21. The non-angled portion of the protrusion 21x is, for example, a portion of the protrusion 21x corresponding to the center of the side of the rectangle Rt. That is, the protrusion X1 is provided on the protrusion 21x of the frame 21.

FIG. 3 shows a state in which two protrusions X1 are provided as an example at the opening proximity angle portion of the protrusion 21x of the frame 21. The protrusion X1 is a part of the protrusion 21x. That is, the protrusion 21x has the protrusion X1.

In the following, the portion of the protrusion 21x corresponding to the center of the side of the rectangular Rt is also referred to as the "center of the side". The rectangle Rt has four sides. Therefore, the protrusion 21x has four side center portions that are non-corner portions.

In FIG. 2, as an example, four protrusions X1 are provided at the center of each of the four sides included in the protrusion 21x. That is, in FIG. 2, a protrusion X1 is provided at the center of each side which is a non-cornered portion. In the following, the protrusion X1 provided on the non-corner portion of the protrusion 21x is also referred to as “protrusion X1n”. In FIG. 2, four protrusions X1n are provided at the center of each of the four sides included in the protrusion 21x. That is, the protrusion X1n is provided on the non-cornered portion (center portion of the side) of the protrusion 21x of the frame 21.

The protrusion X1 may be provided only at the opening proximity angle portion of the protrusion 21x of the frame 21.

As shown in FIG. 3, the shape of the protrusion X1 in a plan view is a circle. The shape of the protrusion X1 in a plan view is not limited to a circle. The shape of the protrusion X1 in a plan view may be, for example, a shape in which the protrusion X1 can be easily processed, or another shape. The shape of the protrusion X1 that can be easily processed is, for example, a quadrangle, an ellipse, or the like.

Further, the protrusion 21x has a wall W2. The wall W2 is a part of the protrusion 21x. The wall W2 is the tip of the protrusion 21x. The wall W2 covers the side surface of the groove V5. Each fixing member 23 housed in the groove V5 is positioned by the wall W2.

The protrusion X1 is provided on the bottom surface (surface 2s) of the groove V5 of the protrusion 21x of the frame 21.

Further, the protrusion X1 and the wall W2 are configured so that the protrusion X1 and the wall W2 do not come into contact with the display panel 10. In the following, the height of the protrusion X1 is also referred to as “height h1” or “h1”. Further, in the following, the thickness of the fixing member 23 is also referred to as “thickness t3” or “t3”. Further, in the following, the height of the wall W2 is also referred to as “height h2” or “h2”.

Specifically, the height h1 of the protrusion X1 is equal to or less than the thickness t3 of the fixing member 23. Further, the height h2 of the wall W2 is equal to or less than the thickness t3 of the fixing member 23. The height h2 of the wall W2 corresponds to the depth of the groove V5. The height h1 of the protrusion X1 is equivalent to the height h2 of the wall W2. The height h1 of the protrusion X1 may be different from the height h2 of the wall W2.

Further, as shown in FIGS. 2 and 3, the fixing member 23 has an engaging portion K1. The engaging portion K1 engages with the protrusion X1 of the protrusion 21x of the frame 21. That is, the engaging portion K1 engages with the protrusion X1 of the frame 21.

In the following, the region where the protrusion X1 exists in the pasted state is also referred to as the "protrusion presence region". In a plan view, the engaging portion K1 is provided in the region of the fixing member 23 that overlaps with the region where the protrusion exists. That is, the engaging portion K1 is provided in the region of the fixing member 23 corresponding to the protrusion X1 of the frame 21.

The engaging portion K1 is a notch V1 or a hole H1. The engaging portion K1 is provided on the fixing member 23 so that the fixing member 23 does not interfere with the side surface of the protrusion X1. The fixing member 23 may come into contact with the side surface of the protrusion X1.

The shape of the notch V1 in the plan view corresponds to the shape of the protrusion X1 in the plan view. Further, the shape of the hole H1 in the plan view is a shape corresponding to the shape of the protrusion X1 in the plan view. The hole H1 is a penetrating hole. Further, the size of the engaging portion K1 which is the notch V1 or the hole H1 is set so that the fixing member 23 does not interfere with the side surface of the protrusion X1.

The engaging portion K1 is provided in the region of the fixing member 23 corresponding to the protrusion X1 of the protrusion 21x. For example, the engaging portion K1 is provided at the end portion of the fixing member 23 in the longitudinal direction. Therefore, the engaging portion K1 of the fixing member 23 engages with the protrusion X1 provided at the corner of the protrusion 21x (opening side portion) of the frame 21. That is, the engaging portion K1 of the fixing member 23 engages with the protrusion X1 provided on the protrusion 21x (opening side portion) of the frame 21.

The engaging portion K1 of the fixing member 23b shown in FIG. 3 is a notch V1. In the following, the end portion of the fixing member 23 existing on the opening H2 side of the frame 21 in the pasting situation is also referred to as an “opening side end portion”. The opening-side end is the end of the fixing member 23 that is close to the opening H2 of the frame 21 in the width direction of the fixing member 23.

As shown in FIG. 3, the notch V1 which is the engaging portion K1 is provided at the opening side end portion of the fixing member 23b. The notch V1 of the fixing member 23b has a protrusion X1 which is one of the two protrusions X1. That is, the notch V1 of the fixing member 23b engages with the protrusion X1. As a result, the fixing member 23b is positioned by the protrusion X1.

Further, the engaging portion K1 of the fixing member 23a shown in FIG. 3 is a hole H1. A protrusion X1 which is the other of the two protrusions X1 is inserted into the hole H1 of the fixing member 23a. That is, the hole H1 of the fixing member 23a engages with the protrusion X1. As a result, the fixing member 23a is positioned by the protrusion X1.

In the following, the situation where the protrusion X1 is inserted into the hole H1 is also referred to as the “protrusion insertion situation”. FIG. 3 shows a protrusion insertion state in which the protrusion X1 is inserted into the hole H1 of the fixing member 23a. In the following, the gap existing in the hole H1 in the protrusion insertion state is also referred to as a “hole gap”.

Further, in the following, the characteristic that the length of the hole gap in the longitudinal direction of the fixing member 23 is longer than the length of the hole gap in the width direction of the fixing member 23 is also referred to as "characteristic A". The characteristic A is a characteristic of the hole H1 in the protrusion insertion state.

The shape of the hole H1 in a plan view is a shape corresponding to the characteristic A. As shown in FIG. 3, the shape of the hole H1 in a plan view is, for example, an ellipse corresponding to the characteristic A.

The shape of the hole H1 in a plan view is not limited to the shape (ellipse) corresponding to the characteristic A. The shape of the hole H1 in a plan view may be, for example, a rectangle, a circle, or the like corresponding to the characteristic A.

As described above, the engaging portion K1 is provided in the region of the fixing member 23 corresponding to the protrusion X1 of the protrusion 21x. In the following, the central portion of the fixing member 23 in the longitudinal direction of the fixing member 23 is also referred to as a “member central portion”.

For example, as shown in FIG. 2, the engaging portion K1 engages with the protrusion X1n provided at the non-cornered portion (center of the side) of the protrusion 21x, so that the engaging portion K1 engages with the fixing member 23b. It is provided in the center of the member. That is, the fixing member 23b further has an engaging portion K1 that engages with the protrusion X1n of the frame 21.

In the following, the engaging portion K1 that engages with the protrusion X1n is also referred to as “engaging portion K1n”. As shown in FIG. 2, the engaging portion K1n of the fixing member 23b engages with the protrusion X1n provided at the non-cornered portion (center side portion) of the protrusion 21x of the frame 21. The engaging portion K1n of the fixing member 23b is a hole H1. The shape of the engaging portion K1n in a plan view is, for example, a circle. The engaging portion K1n of the fixing member 23b may be a notch V1.

The configuration of the fixing member 23c is the same as the configuration of the fixing member 23a described above. Further, the configuration of the fixing member 23d is the same as the configuration of the fixing member 23b described above.

(Action)
As described above, according to the present embodiment, the display device 100 includes a frame 21 that supports the display panel 10. The frame 21 is provided with a fixing member 23 for fixing the display panel 10 to the frame 21. The frame 21 is provided with a protrusion X1. The fixing member 23 has an engaging portion K1 that engages with the protrusion X1 of the frame 21.

In the following, the difference between the linear expansion coefficient of the material constituting the display panel 10 and the linear expansion coefficient of the material constituting the frame 21 is also referred to as “expansion coefficient difference”. Further, in the following, an environment in which heat shrinkage and expansion of the display device 100 are repeated is also referred to as a “heat cycle environment”.

As described above, the display panel 10 is fixed to the frame 21 by the fixing member 23. Therefore, the larger the difference in expansion coefficient, the larger the load applied to the fixing member 23 in the heat cycle environment. As a result, the load may cause a situation in which the position of the fixing member 23 is displaced.

According to the present embodiment, the display device 100 further has a configuration that can cope with the positional deviation of the fixing member 23. Specifically, the position for attaching the fixing member 23 is determined by the engaging portion K1 of the fixing member 23 and the protrusion X1 of the frame 21. For example, the position for attaching the fixing member 23a is determined by the hole H1 which is the engaging portion K1 of the fixing member 23a and the protrusion X1 of the frame 21. Further, for example, the position for attaching the fixing member 23b is determined by the notch V1 which is the engaging portion K1 of the fixing member 23b and the protrusion X1 of the frame 21. Further, the front surface of each fixing member 23 provided on the protrusion 21x of the frame 21 is attached to the back surface 10b of the display panel 10.

Therefore, the amount that the fixing member 23 can move is limited (controlled) by the size of the engaging portion K1 that is the notch V1 or the hole H1. Therefore, even if the position of the fixing member 23 is displaced as described above, it is possible to prevent the fixing member 23 from invading the display area beyond the wall W2. That is, in the heat cycle environment, it is possible to prevent the fixing member 23 from invading the display area corresponding to the opening H2.

Further, according to the present embodiment, the notch V1 is provided at the opening side end portion of the fixing member 23, which is close to the opening H2 of the planar light source device 20 (frame 21). Further, the notch V1 engages with the protrusion X1. As a result, the protrusion X1 functions as a wall that prevents the fixing member 23 from moving. Therefore, it is possible to prevent the fixing member 23 from invading the display area corresponding to the opening H2.

Further, according to the present embodiment, the hole H1 which is the engaging portion K1 is provided in the region corresponding to the protrusion X1 of the frame 21. Therefore, the protrusion X1 and the wall W2 can prevent the fixing member 23 from invading the display area. Further, the protrusion X1 and the wall W2 can control the amount of movement of the fixing member 23 in a direction different from the direction toward the display area. Therefore, it is possible to prevent the frame 21 from protruding from the groove V5.

Further, according to the present embodiment, the shape of the hole H1 in the plan view corresponds to the shape of the protrusion X1 in the plan view. Specifically, the shape of the hole H1 in a plan view is a shape corresponding to the characteristic A (for example, an ellipse). As described above, the characteristic A is that the length of the hole gap in the longitudinal direction of the fixing member 23 is longer than the length of the hole gap in the width direction of the fixing member 23. This makes it possible to improve workability for positioning the fixing member 23.

In the present embodiment, the groove V5 is provided on the surface 21a of the protrusion 21x, but the present invention is not limited to this. The groove V5 may not be provided on the surface 21a of the protrusion 21x (hereinafter, also referred to as “deformation configuration A”).

In the modified configuration A, each fixing member 23 is attached to the surface 21a of the protrusion 21x. That is, in the modified configuration A, each fixing member 23 is provided on the surface 21a of the protrusion 21x. Therefore, in the modified configuration A, the surface 21a of the protrusion 21x is the surface 2s to which each fixing member 23 is attached. Further, in the modified configuration A, the protrusion X1 is provided on the protrusion 21x so that the engaging portion K1 of the fixing member 23 engages with the protrusion X1 in the pasting situation.

By the way, in the above-mentioned related configuration A, the display panel is fixed to the middle frame by the double-sided tape. In the following, the difference between the linear expansion coefficient of the material constituting the display panel and the linear expansion coefficient of the material constituting the middle frame is also referred to as “expansion coefficient difference”.

The larger the difference in expansion coefficient, the greater the load applied to the double-sided tape in the heat cycle environment. As a result, the load may cause the double-sided tape to shift in position, causing the double-sided tape to invade the display area of the display panel.

The display device 100 of the present embodiment has a configuration for achieving the above effects. Therefore, the display device 100 of the present embodiment can prevent the above-mentioned problems from occurring.

<Modification 1>
The configuration of this modification is characterized by the number of protrusions X1 provided at the opening proximity corners of the protrusions 21x. The configuration of this modification is applied to the first embodiment.

FIG. 6 is a plan view of the display device 100 having the configuration of the modified example 1. FIG. 6 shows, as an example, a display device 100 to which the configuration of this modification is applied to the configuration of FIG. That is, the configuration of FIG. 6 is a modified configuration of FIG. 2, which is the configuration of the first embodiment. FIG. 7 is an enlarged view of the region R2 of FIG.

In the configuration of this modification shown in FIG. 7, the number of protrusions X1 provided at the opening proximity angle portion of the protrusion 21x of the frame 21 is 1. The shape of the protrusion X1 in a plan view is, for example, an ellipse. The fixing member 23 has one engaging portion K1 that engages with one protrusion X1 provided at the opening proximity angle portion of the protrusion 21x of the frame 21. The engaging portion K1 shown in FIG. 7 is a notch V1.

Note that one engaging portion K1 that engages with one protrusion X1 provided at the opening proximity angle portion of the protrusion 21x may be a hole H1. Further, the shape of the protrusion X1 in a plan view is not limited to an ellipse, and may be a circle.

In FIG. 7, as an example, one engaging portion K1 of the fixing member 23b and one engaging portion K1 of the fixing member 23a are provided at the opening proximity angle portion of the protrusion 21x. The state of being engaged with X1 is shown. Each of the engaging portion K1 of the fixing member 23b and the engaging portion K1 of the fixing member 23a is a notch V1 as an example.

As a result, the fixing

members

23a and 23b are positioned by one protrusion X1 provided at the opening proximity angle portion of the protrusion 21x of the frame 21.

As described above, according to the present modification, the fixing

members

23a and 23b are positioned by one protrusion X1 provided at the opening proximity angle portion of the protrusion 21x of the frame 21. Further, each of the engaging portion K1 of the fixing member 23b and the engaging portion K1 of the fixing member 23a is a notch V1. As a result, it is possible to prevent a gap from being formed between the fixing member 23a and the fixing member 23b at the opening proximity angle portion of the protrusion 21x of the frame 21. Therefore, it is possible to prevent foreign matter or the like generated between a plurality of members constituting the display device 100 from entering the display area.

<Modification 2>
The configuration of this modification is a configuration in which two adjacent fixing members 23 overlap each other. Further, the configuration of this modification is also a configuration in which a recess is provided in the frame 21. The configuration of this modification is applied to all or part of the first embodiment and the first modification.

FIG. 8 is a plan view showing a part of the display device 100 having the configuration of the modified example 2. As an example, FIG. 8 shows a display device 100 to which the configuration of the present modification is applied to the configuration of FIG. 7, which is the configuration of the modification 1. That is, the configuration of FIG. 8 is a modified configuration of the configuration of FIG. 7. Similar to the configuration of FIG. 7, the configuration of FIG. 8 is similar to the configuration of FIG. 7, and two adjacent fixing members 23 (fixing

members

23a, 23b) are provided by one protrusion X1 provided at the opening proximity angle portion of the protrusion 21x of the frame 21. Positioning is performed.

FIG. 9 is a cross-sectional view of the display device 100 along the B1-B2 line of FIG. As shown in FIGS. 8 and 9, in the configuration of this modification, the two adjacent fixing members 23 overlap each other at the opening proximity angle portion of the protrusion 21x.

In the following, the two adjacent fixing members 23 are also referred to as a fixing member A and a fixing member B. As an example, the fixing member A is the fixing member 23a, and the fixing member B is the fixing member 23b. Further, in the following, a situation in which a part of the fixing member A overlaps with a part of the fixing member B is also referred to as an “overlapping situation”.

Further, in the following, in an overlapping situation where a part of the fixing member A overlaps with a part of the fixing member B, a part composed of the part of the fixing member A and a part of the fixing member B is configured. , Also called "overlapping part 23w".

In FIGS. 8 and 9, as an example, a part of the fixing member 23a overlaps with a part of the fixing member 23b. The overlapping portion 23w of FIG. 9 is composed of a part of the fixing member 23a and a part of the fixing member 23b in an overlapping situation where a part of the fixing member 23a overlaps with a part of the fixing member 23b. ..

A recess V2 is provided in the protrusion 21x of the frame 21. The overlapping portion 23w is housed in the recess V2. In the following, the situation in which the overlapping portion 23w is accommodated in the recess V2 is also referred to as a “dent accommodation situation”.

Further, in the configuration of this modification, the protrusion X1 is provided at the bottom of the recess V2. Therefore, the height h1 of the protrusion X1 is the height from the bottom of the recess V2 to the upper end of the protrusion X1.

In FIG. 9, as an example, a fixing member 23b is attached to the protrusion 21x of the frame 21 along the recess V2. Further, the engaging portion K1 of the fixing member 23b is engaged with the protrusion X1. The engaging portion K1 of the fixing member 23b is a hole H1. The engaging portion K1 of the fixing member 23b may be a notch V1.

Further, the fixing member 23a is attached to the protrusion 21x of the frame 21 so that a part of the fixing member 23a overlaps with a part of the fixing member 23b. As a result, the overlapping portion 23w composed of a part of the fixing member 23a and a part of the fixing member 23b is housed in the recess V2. Further, the front surface of the fixing member 23a, which corresponds to the front surface of the overlapping portion 23w, is attached to the back surface 10b of the display panel 10.

Further, the engaging portion K1 of the fixing member 23a is engaged with the protrusion X1. The engaging portion K1 of the fixing member 23a is a hole H1. The engaging portion K1 of the fixing member 23a may be a notch V1.

In the following, the thickness of the overlapping portion 23w is also referred to as "thickness t3w" or "t3w". Here, it is assumed that each of the thickness of the fixing member 23a and the thickness of the fixing member 23b is the thickness t3. In this case, the thickness t3w of the overlapping portion 23w is "t3 × 2". Further, in the following, the depth of the recess V2 is also referred to as “depth d2” or “d2”.

In this modification, the dent V2 is configured so as to absorb the step due to the presence of the overlapping portion 23w in the overlapping situation and the dent accommodating situation. Specifically, the depth d2 of the recess V2 and the shape of the recess V2 are set so that the value obtained by the formula of "thickness t3w-depth d2" is equal to or less than the height h1 of the protrusion X1. To.

That is, the length obtained by subtracting the length corresponding to the depth d2 of the recess V2 from the length corresponding to the thickness t3w of the overlapping portion 23w is equal to or less than the length corresponding to the height h1 of the protrusion X1. As such, the recess V2 is configured.

As described above, according to this modification, the depth d2 of the recess V2 and the depth d2 of the recess V2 so that the value obtained by the equation of "thickness t3w-depth d2" is equal to or less than the height h1 of the protrusion X1. The shape of the recess V2 is set. Therefore, the value obtained by the formula of "thickness t3w-depth d2" can be set to the height h1 or less of the protrusion X1.

Therefore, in the overlapping situation and the recessing accommodation situation, the recess V2 can absorb the step due to the presence of the overlapping portion 23w.

Further, the recess V2 can suppress the generation of a gap between the fixing member 23a and the fixing member 23b. Therefore, it is possible to prevent foreign matter from entering the display area from the outside.

Note that the configuration of this modification may be applied to the configuration of FIG. 3, which is the configuration of the first embodiment. In the configuration in which the configuration of this modification is applied to the configuration of FIG. 3, two protrusions X1 provided at the opening proximity angle portion of the protrusion 21x are engaged with two protrusions X1 corresponding to the fixing

members

23a and 23b, respectively. The portion K1 engages.

Further, in the configuration in which the configuration of this modification is applied to the configuration of FIG. 3, the overlapping portion 23w formed by overlapping the fixing

members

23a and 23b with each other is housed in the recess V2 of the frame 21 as in FIG. Will be done.

<Modification 3>
The configuration of this modification is a configuration in which a tapered surface and a pin are provided on the protrusion X1. The configuration of this modification is applied to all or a part of the first embodiment, the first modification and the second modification.

FIG. 10 is a plan view showing a part of the display device 100 having the configuration of the modified example 3. As an example, FIG. 10 shows a display device 100 to which the configuration of this modification is applied to the configuration of FIG. 3, which is the configuration of the first embodiment. That is, the configuration of FIG. 10 is a modified configuration of the configuration of FIG.

In the configuration of FIG. 10, the engaging portion K1 of the fixing member 23a is the hole H1. Further, the engaging portion K1 of the fixing member 23b is a hole H1. A protrusion X1 is inserted into each of the hole H1 of the fixing member 23a and the hole H1 of the fixing member 23a. That is, FIGS. 10 and 11 show a protrusion insertion situation in which the protrusion X1 is inserted into the hole H1.

The engaging portion K1 of the fixing member 23a may be a notch V1. Further, the engaging portion K1 of the fixing member 23b may be a notch V1.

FIG. 11 is a cross-sectional view of the display device 100 along the line C1-C2 of FIG. In FIG. 11, in order to make the configuration of the present modification easy to understand, the components related to the configuration of the present modification are mainly shown. In FIG. 11, for example, the rear housing 22, the optical sheet 24, the light guide plate 25, the reflective sheet 26, and the like are not shown.

In the configuration of this modification, the protrusion X1 of the frame 21 has a tapered portion X1b and a pin X1a. The shape of the pin X1a is a rod shape. The pin X1a extends along the vertical direction (Z-axis direction). The pin X1a exists on the tapered portion X1b.

The tapered portion X1b has a tapered shape. Therefore, the tapered portion X1b is configured so that the portion of the tapered portion X1b closer to the pin X1a has a smaller cross-sectional area. As a result, the tapered portion X1b has a tapered surface Tp1 which is a slope.

Further, the cross-sectional area of the pin X1a is smaller than the area of the upper surface of the tapered portion X1b. Further, the height h1 of the protrusion X1 is equal to or less than the thickness t3 of the fixing member 23.

As described above, according to this modification, the protrusion X1 has a tapered portion X1b having a tapered shape. Further, the pin X1a exists on the tapered portion X1b. The pin X1a extends along the vertical direction. Further, the cross-sectional area of the pin X1a is smaller than the area of the upper surface of the tapered portion X1b.

This makes it easy to attach the fixing member 23a to the surface 2s in a state where the protrusion X1 does not interfere with the hole H1 of the fixing member 23a. Further, the presence of the pin X1a limits the movement of the fixing member 23a in the protrusion insertion state. Therefore, it is possible to prevent the fixing member 23a from invading the display area in the heat cycle environment.

It is possible to freely combine the embodiments and the modified examples of the embodiments, and to appropriately modify or omit the embodiments and the modified examples.

10 display panel, 20 planar light source device, 21 frame, 21x protrusion, 22 rear housing, 23, 23a, 23b, 23c, 23d fixing member, 23w overlapping part, 100 display device, H1 hole, K1, K1n engagement Part, Tp1 tapered surface, V1 notch, V2 dent, V5 groove, X1, X1n protrusion, X1a pin, X1b tapered part.

Claims

It ’s a display device,
A display panel that displays images and
A frame that supports the display panel is provided.
The frame is provided with a fixing member for fixing the display panel to the frame.
The display panel is fixed to the frame by the fixing member.
The frame is provided with protrusions, and the frame is provided with protrusions.
The fixing member has an engaging portion that engages with the protrusion of the frame.
Display device.
The frame is provided with an opening.
The frame has an opening side portion that surrounds the opening and is part of the frame.
The protrusion is provided on the opening side portion of the frame, and the protrusion is provided on the opening side portion of the frame.
The engaging portion of the fixing member engages with the protrusion provided on the opening side portion of the frame.
The display device according to claim 1.
The shape of the contour of the opening side portion in a plan view is rectangular, and is
The protrusion is provided at a corner of the opening side portion of the frame.
The engaging portion of the fixing member engages with the protrusion provided at the corner of the opening side portion of the frame.
The display device according to claim 2.
The number of the protrusions provided at the corners of the opening side of the frame is 1.
The fixing member has one engaging portion that engages with one projection provided at a corner of the opening side of the frame.
The display device according to claim 3.
The frame is further provided with another fixing member for fixing the display panel to the frame.
A part of the fixing member overlaps with a part of the other fixing member.
A recess is provided in the opening side portion of the frame.
The recess contains an overlapping portion composed of a part of the fixing member and a part of the other fixing member.
The length obtained by subtracting the length corresponding to the depth of the recess from the length corresponding to the thickness of the overlapping portion is equal to or less than the length corresponding to the height of the protrusion. The depression is composed,
The display device according to claim 3 or 4.
The opening side portion of the frame has a non-corner portion which is a portion different from the corner portion.
Another protrusion is provided on the non-corner portion of the opening side portion of the frame.
The fixing member further comprises another engaging portion that engages with the other projection of the frame.
The other engaging portion of the fixing member engages with the other protrusion provided on the non-corner portion of the opening side portion of the frame.
The display device according to any one of claims 3 to 5.
The protrusion of the frame has a tapered portion and a rod-shaped pin existing on the tapered portion.
The tapered portion has a tapered shape and has a tapered shape.
The tapered portion is configured so that the portion closer to the pin of the tapered portion has a smaller cross-sectional area.
The pins extend along the vertical direction,
The display device according to any one of claims 1 to 6.
The engaging portion is a notch and
The protrusion is present in the notch.
The display device according to any one of claims 1 to 7.
The frame is provided with an opening.
The frame has an opening side portion that surrounds the opening and is part of the frame.
The protrusion is provided on the opening side portion of the frame, and the protrusion is provided on the opening side portion of the frame.
The notch, which is the engaging portion, is provided at the end of the fixing member, which is present on the opening side of the frame.
The display device according to claim 8.
The engaging portion is a hole and
The protrusion is inserted in the hole.
The display device according to any one of claims 1 to 7.