JP6785619B2 - Protective sheet and display device - Google Patents

Description

The present invention relates to a protective sheet and a display device having a configuration for protecting a surface on which an image is displayed.

A display device for displaying an image includes, for example, a liquid crystal display device. A general liquid crystal display device includes a frame, a liquid crystal display panel, and a light source device. The frame holds the liquid crystal display panel and the light source device. The light source device emits light. The liquid crystal display panel displays an image by using the light emitted by the light source device. The liquid crystal display panel includes a pair of substrates, a liquid crystal, and a polarizing plate provided so as to sandwich the pair of substrates. The liquid crystal is sandwiched between a pair of substrates.

Some liquid crystal display devices are further provided with a touch panel, a protective plate, and the like. In the following, the surface of the liquid crystal display device for displaying an image is also referred to as a “display surface”. Further, in the following, the outermost member existing on the display surface side of the liquid crystal display device is also referred to as an "outer member". The outer member is, for example, a liquid crystal display panel, a touch panel, a protective plate, or the like. The outer member is covered with a protective sheet. As a result, it is possible to prevent the outer member from being scratched and the outer member from being soiled.

Patent Document 1 discloses a technique of covering a display screen of an electronic device with a protective sheet (hereinafter, also referred to as "related technique A"). In the following, a member to be fixed to the protective sheet is also referred to as a “fixing target member”. The fixing target member in the related technology A is, for example, a display screen of an electronic device.

Further, in the following, the structure or member existing in the protective sheet for fixing the protective sheet to the member to be fixed is also referred to as a “fixing portion”. The fixing portion in the related technique A is a hole for being covered with the adhesive tape. In the related technique A, a part of the adhesive tape is fixed to the fixing target member (display screen) through the holes.

JP-A-2002-297041

In the related technique A, a fixing portion is provided in the central portion of the protective sheet. Therefore, there is a problem that the peripheral edge of the protective sheet is not fixed to the member to be fixed.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a protective sheet or the like capable of fixing the peripheral edge of the protective sheet.

In order to achieve the above object, the protective sheet according to one aspect of the present invention covers the display area of the display module having a display area for displaying an image and the peripheral area which is an area surrounding the display area. It is a sheet for. On the peripheral edge of the protective sheet, there is a fixing portion for fixing the protective sheet to the display module so that the protective sheet covers the display area and the peripheral area in a plan view, and the fixing portion Is a notch, and the protective sheet has a notch side end portion which is an end portion of the protective sheet in contact with the notch, and the notch side end portion of the protective sheet has a plan view. The adhesive tape is attached so that the adhesive tape covers the notch, and the portion of the adhesive tape that covers the notch is attached to the display module via the notch. Is .

According to the present invention, a fixing portion for fixing the protective sheet to the display module exists on the peripheral edge portion of the protective sheet so that the protective sheet covers the display area and the peripheral area in a plan view. To do.

As a result, the peripheral edge of the protective sheet can be fixed to the display module.

It is an exploded perspective view of the display device which concerns on Embodiment 1 of this invention. It is a top view of the display panel which concerns on Embodiment 1 of this invention. It is a top view of the display module which concerns on Embodiment 1 of this invention. It is a top view of the display device which concerns on Embodiment 1 of this invention. It is sectional drawing of the display device along the line A1-A2 of FIG. It is a figure for demonstrating the structure which the display module does not provide a protective plate. It is a top view which shows the display device which concerns on the modification 1 of Embodiment 1 of this invention. It is a top view which shows the display device which concerns on the modification 2 of Embodiment 1 of this invention. It is a top view which shows the display device which concerns on the modification 3 of Embodiment 1 of this invention. It is a figure which shows the structure of the display device which concerns on Embodiment 2 of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings below, the same components are designated by the same reference numerals. The names and functions of the components with the same reference numerals are the same. Therefore, detailed description of a part of each component having the same reference numeral may be omitted.

The dimensions, materials, shapes, relative arrangements, and the like of each component exemplified in the embodiment may be appropriately changed depending on the configuration of the device to which the present invention is applied, various conditions, and the like. In addition, the dimensions of each component in each drawing may differ from the actual dimensions.

<Embodiment 1>
(Overall configuration of display device)
FIG. 1 is an exploded perspective view of the display device 200 according to the first embodiment of the present invention. The display device 200 is, for example, a liquid crystal display device that displays an image using a liquid crystal. The display device 200 is not limited to the liquid crystal display device, and may be a display device of another type. The display device 200 may be, for example, an organic EL (Electroluminescence) display.

In FIG. 1, each of the X, Y, and Z directions is 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”.

With reference to FIG. 1, the display device 200 includes a protective sheet 30 and a display module 100. The display module 100 is a module for displaying an image. The protective sheet 30 is a sheet for protecting the display module 100. The display module 100 includes a light source device 5, a display panel 11, and a protective plate 12. The display module 100 does not have to include the protective plate 12.

The display module 100 may be configured to include a front frame (not shown) having an opening (hereinafter, also referred to as “configuration Ctf”). In the configuration Ctf, the front frame holds the display panel 11 and the light source device 5 by a claw-shaped fixing structure, a screwing structure, and the like. In configuration Ctf, the display module 100 does not include a protective plate 12.

The light source device 5 is a planar light source device having a planar shape. The light source device 5 includes an optical sheet unit, an intermediate frame, a rear frame, and the like.

Although the details will be described later, the display panel 11 displays an image using the light emitted by the light source device 5. The display panel 11 is, for example, a liquid crystal display panel. The display panel 11 is not limited to the liquid crystal display panel, and may be a display panel of another type.

FIG. 2 is a plan view of the display panel 11 according to the first embodiment of the present invention. With reference to FIG. 2, the display panel 11 has a display area Rg1 and a peripheral area Rg2. The display area Rg1 is an area for the display panel 11 (display module 100) to display an image.

The peripheral region Rg2 is provided around the display region Rg1 in a plan view (XY plane). Specifically, the peripheral region Rg2 is a region surrounding the display region Rg1 in a plan view (XY plane). The shape of the peripheral region Rg2 in a plan view (XY plane) is a closed loop shape. The peripheral area Rg2 is an area in which no image is displayed (hereinafter, also referred to as a “non-display area”).

The display area Rg1 and the peripheral area Rg2 are also applied to the XY plane, the XZ plane, and the YZ plane in the display module 100 including the display panel 11 in the same manner as the display panel 11.

The protective plate 12 is made of a transparent material having translucency. The protective plate 12 covers the display area Rg1 and the peripheral area Rg2 of the display panel 11.

FIG. 3 is a plan view of the display module 100 according to the first embodiment of the present invention. In FIG. 3, for the protective plate 12 made of a transparent material, only the outline of the protective plate 12 is shown. As described above, the display region Rg1 and the peripheral region Rg2 are also applied to the XY plane, the XZ plane, and the YZ plane in the display module 100 in the same manner as the display panel 11. Therefore, the display module 100 has a display area Rg1 and a peripheral area Rg2, similarly to the display panel 11.

Next, each of the above-mentioned members constituting the display device 200 will be described in more detail.

(Display panel)
As described above, the display panel 11 is a liquid crystal display 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 color filter substrate, a TFT substrate, a spacer, a sealing material, a liquid crystal layer, an alignment film, and a polarizing plate.

The color filter substrate is a substrate on which a color filter, a light-shielding layer, and the like are formed. The TFT substrate has a thin transistor, a pixel electrode, or the like formed on another substrate. In the following, the thin transistor is also referred to as a "TFT (Thin Film Transistor)". The TFT is a switching element.

The color filter substrate and the TFT substrate are provided so as to face each other. The spacer is provided so as to generate a predetermined distance between the color filter substrate and the TFT substrate. The sealing material is a member for bonding the color filter substrate and the TFT substrate to each other. The liquid crystal layer is sandwiched between the color filter substrate and the TFT substrate. The alignment film is a film for aligning the liquid crystals constituting the liquid crystal layer.

The liquid crystal display panel controls the orientation of the liquid crystal in the liquid crystal layer by changing the switching element (TFT) to an on state or an off state. Then, the liquid crystal display panel modulates the light incident on the liquid crystal display panel in accordance with the video signal. As a result, the liquid crystal display panel displays an image.

The drive system of the liquid crystal display panel is, for example, a TN (Twisted Nematic) system, an IPS (In Plane Switching) system, an FFS (Fringe Field Switching) system, or the like. The TN method is a method of displaying an image by applying an electric field propagating in a direction substantially perpendicular to the color filter substrate and the TFT substrate to the liquid crystal layer. The IPS system is a system in which a switching element and a counter electrode are provided on a TFT substrate, and an electric field propagating in a lateral direction or an oblique direction is applied to a liquid crystal layer.

The display panel 11 is not limited to the liquid crystal display panel, and may be, for example, a panel in which characters, pictures, etc. are printed on a transparent plate.

(Light source device)
The light source device 5 includes a light source, a light source substrate, a light guide plate, an optical sheet portion, a reflective sheet, and a rear frame. The light source device 5 does not have to include the rear frame.

The light source emits light. The light source substrate is a substrate provided with a light source. The light guide plate guides the light emitted by the light source in a specific direction. The light guide plate is a member for guiding light to the optical sheet portion. The light guide plate has an exit surface and a counter-exit surface. The exit surface is the surface on which light is emitted. The counter-emission surface is a surface of the light guide plate opposite to the exit surface.

The light emitted by the light source is incident on the light guide plate, and most of the light incident on the light guide plate is emitted in the Z direction from the emission surface of the light guide plate. As a result, the light guide plate emits planar light. A part of the light incident on the light guide plate is emitted in the −Z direction.

The optical sheet portion is provided on the exit surface of the light guide plate. The optical sheet unit is composed of a plurality of optical sheets. The optical sheet unit controls the distribution and spread of the light emitted from the light guide plate.

The reflective sheet is provided on the side of the light emitting surface of the light guide plate. The reflective sheet is a sheet that reflects light. Due to the presence of the reflective sheet, the light emitted from the light guide plate in the −Z direction is reflected by the reflective sheet and is incident on the light guide plate again.

The rear frame holds a light source, a light guide plate, an optical sheet portion, a reflective sheet, and the like.

The light source device 5 may further include an intermediate frame. In the following, the configuration in which the light source device 5 includes the intermediate frame is also referred to as “configuration Ctm”.

(Light guide plate)
The light guide plate is made of a transparent material. The transparent material is acrylic resin, polycarbonate resin, glass, or the like. Further, a light scattering portion is formed on the incident surface of the light guide plate. The light scattering unit has a structure that disturbs the propagation direction of the light incident on the light guide plate so that the light is emitted from the emitting surface.

The light scattering unit functions as a reflecting means for reflecting light toward the inside of the light guide plate. The reflecting means is configured, for example, by printing dots on the return surface. Further, the reflecting means is configured by, for example, roughening the ejection surface to form a textured surface. Further, the reflecting means is configured by forming, for example, a minute spherical surface, unevenness, or the like on the return surface.

(Optical sheet)
As described above, the optical sheet unit is composed of a plurality of optical sheets. The optical sheet unit is configured by combining, for example, an optical sheet such as a lens sheet and a diffusion sheet. The optical sheet portion may be configured by sandwiching the lens sheet with the diffusion sheet.

Further, in order to improve the brightness, the optical sheet portion may be composed of a plurality of lens sheets in which the directions of the prisms are optimally combined. Further, the optical sheet portion may be composed of two or more diffusing sheets in order to improve the diffusivity of light. The optical sheet unit is configured by arranging a plurality of optical sheets selected in order to obtain a desired brightness, a desired viewing angle, and the like in an appropriate order.

(Reflective sheet)
The reflective sheet is composed of, for example, a material obtained by mixing polyethylene or polyethylene terephthalate with barium sulfate or titanium oxide.

The reflective sheet may be made of, for example, a material in which fine bubbles are formed in the resin. Further, the reflective sheet may be made of, for example, a material obtained by depositing silver on a metal plate. Further, the reflective sheet may be made of, for example, a metal plate coated with a paint containing titanium oxide.

The reflectance of the reflective sheet is preferably 90% or more in order to suppress the reflection loss on the reflective surface. Therefore, the reflective sheet may be made of, for example, a material for realizing specular reflection. Due to the presence of the reflective sheet, the light emitted from the light guide plate in the −Z direction is reflected by the reflective sheet and is incident on the light guide plate again. Therefore, the light utilization efficiency can be improved.

(Rear frame)
The shape of the rear frame is a box shape with a bottom and no lid. The rear frame mainly accommodates a light source, a light source substrate, a light guide plate, an optical sheet portion, a reflective sheet, and the like. As an example, the rear frame may be made of a metal having high thermal conductivity in order to conduct heat emitted from the light source of the light source substrate. The metal having high thermal conductivity is, for example, aluminum, an aluminum alloy, or the like. The rear frame made of metal with high thermal conductivity efficiently dissipates heat from the light source of the light source substrate. As a result, it is possible to prevent heat from being trapped in the light source device 5.

(Intermediate frame)
In the above-described configuration Ctm, the intermediate frame has an opening for passing light from the exit surface of the light guide plate. In the configuration Ctm, the display panel 11 is mounted on the upper surface of the intermediate frame. That is, the display panel 11 is held in the intermediate frame.

The intermediate frame is made of metal. The metal is aluminum, stainless steel, iron or the like. The intermediate frame may be made of resin. The resin is PC (Polycarbonate), ABS (Acrylonitrile Butadiene Styrene: acrylonitrile butadiene styrene), or the like.

The rear frame is generally fixed to the intermediate frame by a claw-shaped fixing structure, a screwing structure, or the like. The claw-shaped fixed structure is a structure in which claw-shaped protrusions provided on each of the rear frame and the intermediate frame engage with each other. The rear frame and the intermediate frame hold a light source, a light source substrate, a light guide plate, an optical sheet portion, a reflective sheet, and the like.

(Front frame)
In the configuration Ctf described above, the front frame holds the display panel 11 and the light source device 5. The front frame is made of thin metal, resin molded products, and the like. In the configuration Ctf, the front frame is fixed to the light source device 5 by a claw-shaped fixing structure, a screwing structure, or the like. The front frame is made up of one member.

The front frame may be configured by combining a plurality of members. Further, the front frame may be provided with mounting portions (screws, mounting holes, etc.) on the side surface, the front surface, the back surface, the peripheral edge portion, and the like. The mounting portion is, for example, a portion to be mounted on the housing (not shown) of the display module 100.

(Protective plate)
The protective plate 12 is made of a transparent material having translucency. The transparent material is, for example, glass, resin, or the like. The protective plate 12 may have a touch panel function. The shape of the protective plate 12 in a plan view (XY plane) is rectangular. The shape of the protective plate 12 in a plan view (XY plane) may be, for example, a shape other than a rectangle.

(Protective sheet)
The protective sheet 30 is made of a transparent material having translucency. The protective sheet 30 is made of a resin material such as polyethylene terephthalate (PET). The shape of the protective sheet 30 in a plan view (XY plane) is substantially rectangular. The shape of the protective sheet 30 in a plan view (XY plane) may be a shape other than a substantially rectangular shape.

(Characteristic configuration)
Next, the characteristic configuration of the present embodiment will be described. FIG. 4 is a plan view of the display device 200 according to the first embodiment of the present invention. In FIG. 4, the protective sheet 30 made of a transparent material is represented in a state where the entire protective sheet 30 is transparent. That is, in FIG. 4, only the outline of the protective sheet 30 is shown for the protective sheet 30 made of the transparent material. Therefore, in FIG. 4, the display area Rg1 and the peripheral area Rg2 of the display module 100 (display panel 11) are also shown.

The display area Rg1 and the peripheral area Rg2 are also applied to the XY surface, the XZ surface, and the YZ surface of the protective plate 12 included in the display module 100 in the same manner as the display panel 11. Therefore, the protective plate 12 has a display area Rg1 and a peripheral area Rg2, similarly to the display panel 11.

The size of the protective sheet 30 in the X-axis direction is the same as the size of the protective plate 12 in the X-axis direction. Further, the size of the protective sheet 30 in the Y-axis direction is the same as the size of the protective plate 12 in the Y-axis direction. That is, in a plan view (XY plane), the size of the protective sheet 30 is the same as the size of the protective plate 12.

The expression "the size of the protective sheet 30 is the same as the size of the protective plate 12" also includes the meaning that "the size of the protective sheet 30 is the same as the size of the protective plate 12". For example, the size of the protective sheet 30 may be, for example, a size in the range of 0.8 to 1.2 times the size of the protective plate 12.

The size of the protective plate 12 in the plan view (XY plane) is the size of the outer shell of the protective plate 12 (display module 100) in the plan view (XY plane). Therefore, in a plan view (XY plane), the size of the protective sheet 30 is the same as the size of the outer shell of the display module 100. The expression "the size of the protective sheet 30 is the same as the size of the outer shell of the display module 100" also includes the meaning that "the size of the protective sheet 30 is the same as the size of the outer shell of the display module 100". .. For example, the size of the protective sheet 30 may be, for example, a size in the range of 0.8 to 1.2 times the size of the outer shell of the display module 100.

FIG. 5 is a cross-sectional view of the display device 200 along the lines A1-A2 of FIG. In the present embodiment, as shown in FIG. 5, a protective plate 12 is provided on the display panel 11. The surface of the display panel 11 is protected by the protective plate 12.

In the following, in the display module 100, the surface for displaying an image is also referred to as a “display surface”. Further, in the following, the outermost member existing on the display surface side of the display module 100 is also referred to as an “outer member”. The image displayed by the display panel 11 is also displayed on the outer member. That is, the outer member has a display surface. As shown in FIG. 5, the outer member in the present embodiment is a protective plate 12.

In addition, a black frame having an opening may be provided in the peripheral region Rg2 of the protective plate 12 (hereinafter, also referred to as “configuration Ct1w”). The black frame is composed of, for example, a seal, a paint, or the like. In the configuration Ct1w, the opening is for exposing the display region Rg1 of the protective plate 12. The shape of the black frame is a closed loop shape.

Further, in the following, a member having a role of a design on the front surface of the display module 100 is also referred to as a “front design member”. In the configuration Ct1w, the outer member (protective plate 12) of the display module 100 is the front design member. In the configuration Ct1w, the protective plate 12 provided with the black frame in the peripheral region Rg2 has a role as a design on the front surface of the display module 100. Therefore, in the configuration Ct1w, the protective sheet 30 is provided so as to cover the black frame and the display area Rg1 of the protective plate 12 in a plan view (XY plane).

Even when the protective plate 12 as the outer member is not provided with the black frame, the protective plate 12 has a role as a front design member.

The protective sheet 30 is a sheet for covering the surface of the front design member (outer member) of the display module 100. Specifically, the protective sheet 30 is a sheet for covering the display area Rg1 of the display module 100 and the peripheral area Rg2 of the display module 100. Although the details will be described later, the protective sheet 30 is attached to the display module 100 by the adhesive tape 4. As shown in FIG. 1, the adhesive tape 4 has a main surface 4a and an adhesive surface 4b. An adhesive is provided on the entire adhesive surface 4b.

With reference to FIGS. 1, 4 and 5, there is a notch V1 on the peripheral edge of the protective sheet 30. The "peripheral portion of the protective sheet 30" corresponds to a portion of the protective sheet 30 that covers the display area Rg1. Therefore, the notch V1 exists in a portion of the protective sheet 30 that does not overlap with the display area Rg1 in a plan view (XY plane). The shape of the peripheral edge of the protective sheet 30 in a plan view is a closed loop shape.

Further, in a plan view (XY plane), the size of the adhesive tape 4 is larger than the size of the notch V1.

In the following, the end portion of the protective sheet 30 in contact with the notch V1 is also referred to as “notch side end portion Ed1”. That is, the protective sheet 30 has a notched side end Ed1. As shown in FIG. 4, the notch side end portion Ed1 is a portion of the protective sheet 30 around the notch V1. Further, the notch V1 exists in a portion of the protective sheet 30 that does not overlap with the display area Rg1 in a plan view (XY plane).

As shown in FIG. 4, the shape of the notched side end Ed1 in the plan view (XY plane) is, for example, U-shaped.

In the present embodiment, as shown in FIGS. 1 and 4, there are two notches V1 on the peripheral edge of the protective sheet 30.

A notch V1 is present at the notch side end Ed1 of the protective sheet 30. Further, the adhesive tape 4 is attached to the notch side end portion Ed1 so that the adhesive tape 4 covers the notch V1 in a plan view (XY plane). That is, the adhesive tape 4 is attached to the notch side end portion Ed1 so that the adhesive tape 4 covers the entire notch V1.

The area to which the adhesive tape 4 is attached is the entire notch side end portion Ed1 or a part of the notch side end portion Ed1. Note that FIG. 4 shows, as an example, a state in which the adhesive tape 4 is attached to the entire notch side end portion Ed1.

In the following, the portion of the adhesive tape 4 that covers the notch V1 is also referred to as a “notch corresponding portion”. The notch corresponding portion is, for example, a portion of the adhesive tape 4 of FIG. 4 that covers the notch V1. The notch corresponding portion is attached to the display module 100 via the notch V1.

Specifically, the portion of the adhesive surface 4b corresponding to the notch corresponding portion is attached to the display module 100 (protective plate 12) via the notch V1. That is, the protective sheet 30 is fixed to the display module 100 (protective plate 12) by using the adhesive tape 4 and the notch V1. Therefore, in the display device 200, the display region Rg1 and the peripheral region Rg2 of the display module 100 are covered by the protective sheet 30 in a plan view (XY plane).

In the following, the configuration existing in the protective sheet 30 for fixing the protective sheet 30 to the display module 100 so that the protective sheet 30 covers the display area Rg1 and the peripheral area Rg2 in a plan view (XY plane) or The member is also referred to as a "fixed portion". In the present embodiment, the fixing portion is a notch V1. That is, a fixing portion (notch V1) exists on the peripheral edge portion of the protective sheet 30.

As described above, according to the present embodiment, the protective sheet 30 covers the display area Rg1 and the peripheral area Rg2 in a plan view (XY plane) on the peripheral edge of the protective sheet 30. There is a fixing portion for fixing 30 to the display module 100.

As a result, the peripheral edge of the protective sheet 30 can be fixed to the display module 100.

Further, in the present embodiment, the size of the protective sheet 30 is the same as the size of the outer shell of the protective plate 12 (display module 100) in a plan view (XY plane). In the present embodiment, the entire surface of the protective plate 12, which is the front design member, is covered by the protective sheet 30 and the notch-corresponding portion of the adhesive tape 4. Therefore, it is possible to prevent the surface of the front design member (protective plate 12) from being scratched and the front design member (protective plate 12) from being soiled. Therefore, the front design member of the display module 100 can be protected.

Further, in the present embodiment, the fixing portion (notch V1) exists at the peripheral edge portion of the protective sheet 30. Therefore, the protective sheet 30 can be fixed to the peripheral region Rg2 other than the display region Rg1, which is an important region in the display module 100, by using the adhesive tape 4 and the notch V1.

Therefore, it is possible to prevent a defect caused by the adhesive of the adhesive tape 4 from occurring in the display region Rg1. The defect caused by the adhesive is, for example, a defect that the surface characteristics of the portion to which the adhesive is attached change.

Further, the notch V1 exists at the peripheral edge of the protective sheet 30. Therefore, the difficulty of processing when manufacturing the protective sheet 30 is the same as the difficulty of processing when manufacturing a conventional rectangular protective sheet in which the notch V1 does not exist. Therefore, the protective sheet 30 can be manufactured at a cost equivalent to the manufacturing cost of the conventional protective sheet.

Here, it is assumed that the shape of the protective sheet 30 is the same as the shape of the protective plate 12. That is, it is assumed that the protective sheet 30 does not have the notch V1. In the hypothetical configuration, a part of the adhesive tape 4 can be attached to the side surface of the display module 100 by bending the adhesive tape 4.

However, if the notch V1 of the protective sheet 30 is used as in the present embodiment, the protective sheet 30 can be fixed in close contact with the front design member. Therefore, the front design member can be more reliably protected than the above-mentioned hypothetical configuration.

Further, in the present embodiment, the notch corresponding portion of the adhesive tape 4 is attached to the front design member via the notch V1 without bending the adhesive tape 4. Therefore, when it becomes necessary to peel off the adhesive tape 4, the adhesive tape 4 can be easily peeled off. Therefore, the protective sheet 30 can be easily attached and detached.

As long as the protective sheet 30 can be fixed to a predetermined area in the display module 100, the number of notches V1 existing in the protective sheet 30 and the size of the notches V1 are not limited to the above configuration.

For example, the number of notches V1 existing in the protective sheet 30 is not limited to 2, and may be 1 or 3 or more. Further, the size of the notch V1 is not limited to the size of the notch V1 shown in FIG. For example, the size of the notch V1 may be in the range of 0.5 to 2 times the size of the notch V1 shown in FIG.

Further, in the present embodiment, the outer member of the display module 100 is the protective plate 12, but the present invention is not limited to this. For example, the display module 100 may be configured not to include the protective plate 12 (hereinafter, also referred to as “configuration Ct1n”). FIG. 6 is a diagram for explaining the configuration Ct1n.

In the configuration Ct1n, the outer member of the display module 100 is the display panel 11. The display panel 11 as an outer member is a front design member. In the configuration Ct1n, the protective sheet 30 is fixed to the display module 100 (display panel 11) by using the adhesive tape 4 and the notch V1.

In the configuration Ct1n, the notch-corresponding portion of the adhesive tape 4 is attached to the display module 100 via the notch V1. Specifically, the portion of the adhesive surface 4b corresponding to the notch corresponding portion is attached to the display module 100 (display panel 11) via the notch V1.

Further, in the configuration Ctf in which the display module 100 includes a front frame (not shown), the front frame is a front design member (outer member). The front frame is configured such that the opening of the front frame exposes the display area Rg1 of the display panel 11 and the front frame covers the peripheral area Rg2 of the display panel 11. In the configuration Ctf, the protective sheet 30 is fixed to the display module 100 (front frame) by using the adhesive tape 4 and the notch V1.

The conventional protective sheet (hereinafter referred to as "protective sheet N") is generally smaller than the size of the outer shell of the display module and larger than the display area. Therefore, conventionally, the peripheral edge portion of the protective sheet is fixed to the display module by the adhesive tape while the protective sheet covers the display area.

Therefore, in the fixing method using the protective sheet N, there is a portion of the peripheral edge of the display module that is not covered by the protective sheet N and the adhesive tape. Therefore, in the fixing method using the protective sheet N, there is a possibility that the peripheral edge of the display module is scratched, the peripheral edge of the display module is dirty, and the like.

Therefore, a fixing method using a protective sheet having the same size as the outer shell of the display module in a plan view (XY plane) can be considered. However, in the fixing method, it is necessary to attach one end of the adhesive tape to the protective sheet and the other end of the adhesive tape to the side surface of the display module in a bent state. The fixing method has a problem that the work of peeling off the protective sheet is complicated when it becomes necessary to peel off the adhesive tape from the display module.

Therefore, the protective sheet 30 of the present embodiment is configured as described above. Therefore, the protective sheet 30 and the display device 200 provided with the protective sheet 30 can solve each of the above problems.

<Modification 1 of the first embodiment>
The configuration of the modification 1 of the present embodiment is a configuration relating to a mark for attaching the adhesive tape (hereinafter, also referred to as “configuration Ct1A”). In the following, the display device having the configuration Ct1A will also be referred to as “display device 200A”. The display device 200A is different from the display device 200 in that the protective sheet 30A is provided instead of the protective sheet 30. Since the other configurations of the display device 200A are the same as those of the display device 200, the detailed description will not be repeated.

FIG. 7 is a plan view showing the display device 200A according to the first modification of the first embodiment of the present invention. In FIG. 7, the outer shell of the display module 100 is shown by a dotted line.

The protective sheet 30A is different from the protective sheet 30 of FIG. 4 in that the notched side end portion Ed1 has a mark portion X1. Further, the shape of the notch V1 of the protective sheet 30A is different from the shape of the notch V1 of the protective sheet 30. Since the other configurations of the protective sheet 30A are the same as those of the protective sheet 30, detailed description will not be repeated.

The mark portion X1 is a portion that serves as a mark for attaching the adhesive tape 4 to a predetermined area of the protective sheet. In the following, the end portion of the protective sheet 30A in contact with the notch V1 is also referred to as “notch side end portion Ed1”. The notch side end portion Ed1 exists in a portion of the protective sheet 30A that does not overlap with the display region Rg1 in a plan view (XY plane). Further, the mark portion X1 is a portion serving as a mark for attaching the adhesive tape 4 to the notch side end portion Ed1.

The mark portion X1 is a part of the notch side end portion Ed1. That is, the notch side end portion Ed1 of the protective sheet 30A has a mark portion X1. In a plan view (XY plane), the mark portion X1 projects toward the notch V1.

Note that FIG. 7 shows, as an example, a state in which each of the two notched side end portions Ed1 existing in the protective sheet 30A has two marking portions X1. That is, FIG. 7 shows a state in which the protective sheet 30A has four marking portions X1.

Further, FIG. 7 shows, as an example, a state in which the adhesive tape 4 is attached to a part of each notch side end portion Ed1. The adhesive tape 4 may be attached to the entire Ed1 on each notch side.

Further, in the display device 200A, the display region Rg1 and the peripheral region Rg2 of the display module 100 are covered by the protective sheet 30A in a plan view (XY plane).

As described above, according to the first modification of the present embodiment, the notch-side end Ed1 of the protective sheet 30A serves as a mark for the adhesive tape 4 to be attached to the notch-side end Ed1. It has a mark portion X1. Therefore, in the manufacturing process of the display device 200A, the operator can easily attach the adhesive tape 4 to the notch side end portion Ed1 of the protective sheet 30A. That is, the sticking accuracy of the adhesive tape 4 can be improved.

Therefore, almost the entire area of the front design member of the display module 100 can be covered with the protective sheet 30A and the adhesive tape 4. As a result, the front design member of the display module 100 can be more reliably protected.

The shape of the mark portion X1 is not limited to the shape shown in FIG. 7, and may be another shape. Further, the number of the mark portions X1 existing in the protective sheet 30A is not limited to 4, and may be 1 to 3, or 5 or more.

<Modification 2 of the first embodiment>
The configuration of the modified example 2 of the present embodiment is a configuration in which the protective sheet has a portion existing outside the outer shell of the display module 100 in a plan view (XY plane) (hereinafter, also referred to as “configuration Ct1B”). .. In the following, the display device having the configuration Ct1B is also referred to as “display device 200B”. The display device 200B is different from the display device 200 in that the protective sheet 30B is provided instead of the protective sheet 30. Since the other configurations of the display device 200B are the same as those of the display device 200, the detailed description will not be repeated.

FIG. 8 is a plan view showing the display device 200B according to the second modification of the first embodiment of the present invention. In FIG. 8, the outer shell of the display module 100 is shown by a dotted line.

In the following, the portion of the protective sheet existing outside the outer shell of the display module 100 in a plan view (XY plane) is also referred to as “outer portion W1” or “outer portion”. The outer portion W1 is a portion that does not overlap with the display module 100 in a plan view (XY plane).

The protective sheet 30B is different from the protective sheet 30 of FIG. 4 in that the notched side end portion Ed1 has an outer portion W1. Further, the shape of the protective sheet 30B is different from the shape of the protective sheet 30. Further, a part of the notch V1 of the protective sheet 30B exists outside the outer shell of the display module 100 in a plan view (XY plane). Since the other configurations of the protective sheet 30B are the same as those of the protective sheet 30, detailed description will not be repeated.

In the following, the end portion of the protective sheet 30B in contact with the notch V1 is also referred to as “notch side end portion Ed1”. The notch side end portion Ed1 exists in a portion of the protective sheet 30B that does not overlap with the display area Rg1 in a plan view (XY plane). The outer portion W1 is a part of the notch side end portion Ed1. That is, the notched side end portion Ed1 of the protective sheet 30B has an outer portion W1.

Note that FIG. 8 shows, as an example, a state in which each of the two notched side end portions Ed1 existing in the protective sheet 30B has two outer portions W1. That is, FIG. 8 shows a state in which the protective sheet 30B has four outer portions W1.

Further, FIG. 8 shows, as an example, a state in which the adhesive tape 4 is attached to a part of each outer portion W1. The adhesive tape 4 may be attached to the entire outer portion W1.

Further, in the display device 200B, the display region Rg1 and the peripheral region Rg2 of the display module 100 are covered by the protective sheet 30B in a plan view (XY plane).

As described above, according to the second modification of the present embodiment, the notch side end portion Ed1 of the protective sheet 30B is outside the outer shell of the display module 100 in a plan view (XY plane). It has a part W1. Therefore, by attaching the adhesive tape 4 to the outer portion W1 of the protective sheet 30B, the entire area of the front design member of the display module 100 can be covered with the protective sheet 30B and the adhesive tape 4. As a result, the front design member of the display module 100 can be more reliably protected.

The shape of the outer portion W1 is not limited to the shape shown in FIG. 8, and may be another shape. Further, the number of outer portions W1 existing in the protective sheet 30B is not limited to 4, and may be 1 to 3, or 5 or more.

<Modification 3 of Embodiment 1>
The configuration of the modification 3 of the present embodiment is a configuration in which the above-mentioned configuration Ct1A and the above-mentioned configuration Ct1B are combined (hereinafter, also referred to as “configuration Ct1Ab”). In the following, a display device having the configuration Ct1Ab is also referred to as a “display device 200Ab”. The display device 200Ab is different from the display device 200 in that the protective sheet 30Ab is provided instead of the protective sheet 30. Since the other configurations of the display device 200Ab are the same as those of the display device 200, the detailed description will not be repeated.

FIG. 9 is a plan view showing a display device 200Ab according to a modification 3 of the first embodiment of the present invention. In FIG. 9, the outer shell of the display module 100 is shown by a dotted line.

The protective sheet 30Ab is different from the protective sheet 30B of FIG. 8 in that the notched side end portion Ed1 has a mark portion X1. Since the other configurations of the protective sheet 30Ab are the same as those of the protective sheet 30B, the detailed description will not be repeated.

In the following, the end portion of the protective sheet 30Ab in contact with the notch V1 is also referred to as “notch side end portion Ed1”. The notch side end portion Ed1 exists in a portion of the protective sheet 30Ab that does not overlap with the display region Rg1 in a plan view (XY plane).

Note that FIG. 9 shows, as an example, a state in which each of the two notched side end portions Ed1 existing in the protective sheet 30Ab has two marking portions X1 and two outer portions W1. A part of each mark portion X1 shown in FIG. 9 is also an outer portion W1.

The configurations of the mark portion X1 and the outer portion W1 are the same as those described above. In the display device 200Ab, the display region Rg1 and the peripheral region Rg2 of the display module 100 are covered with the protective sheet 30Ab in a plan view (XY plane).

As described above, according to the modification 3 of the present embodiment, the effect of the above-described configuration Ct1A and the effect of the above-mentioned configuration Ct1B can be obtained. That is, in the manufacturing process of the display device 200Ab, the operator can easily attach the adhesive tape 4 to the notch side end portion Ed1 of the protective sheet 30Ab. Further, by attaching the adhesive tape 4 to the mark portion X1 and the outer portion W1 of the protective sheet 30Ab, the entire area of the front design member of the display module 100 can be covered with the protective sheet 30Ab and the adhesive tape 4. As a result, the front design member of the display module 100 can be more reliably protected.

<Embodiment 2>
The configuration of the present embodiment is a configuration using a part of the protective sheet (hereinafter, also referred to as “configuration Ct2”). In the following, the display device having the configuration Ct2 is also referred to as “display device 200C”. The display device 200C is different from the display device 200 of FIG. 4 in that the protective sheet 30C is provided instead of the protective sheet 30. Since the other configurations of the display device 200C are the same as those of the display device 200, the detailed description will not be repeated.

FIG. 10 is a diagram showing a configuration of a display device 200C according to a second embodiment of the present invention. FIG. 10A is a plan view of the display device 200C according to the second embodiment of the present invention. In FIG. 10A, the outer shell of the display module 100 is shown by a dotted line in order to make the configuration of the display device 200C easy to understand. 10 (b) is a cross-sectional view of the display device 200C along the line B1-B2 of FIG. 10 (a).

The protective sheet 30C is different from the protective sheet 30 of FIG. 4 in that it has a holding portion Hd instead of the notch V1. Further, the size of the protective sheet 30C in the plan view (XY plane) is larger than the size of the protective sheet 30 in the plan view (XY plane). Since the other configurations of the protective sheet 30C are the same as those of the protective sheet 30, detailed description will not be repeated.

The shape of the protective sheet 30C in a plan view (XY plane) is rectangular. Further, as an example, the size of the protective sheet 30C in the plan view (XY plane) in the X-axis direction is larger than the size of the display module 100 in the plan view (XY plane) in the X-axis direction.

The protective sheet 30C has, for example, two holding portions Hd. Each holding portion Hd is a part of the peripheral portion of the protective sheet 30C. That is, each holding portion Hd is present on the peripheral portion of the protective sheet 30C. Each holding portion Hd exists in a portion of the protective sheet 30C that does not overlap with the display region Rg1 in a plan view (XY plane).

The two holding portions Hd of the protective sheet 30C face each other in the X-axis direction. Further, the protective sheet 30C has a main surface 30Ca and a back surface 30Cb.

In the following, the protective sheet 30C in which the holding portion Hd does not exist in the protective sheet 30C is also referred to as “protective sheet 30CN”. The holding portion Hd is generated by forming a notch along the line segment CL1 in FIG. 10A, for example, at the peripheral portion of the protective sheet 30CN.

The shape of the holding portion Hd is semicircular. In the following, the tip portion of the holding portion Hd is also referred to as a “holding tip portion”.

The holding portion Hd is configured so that the holding tip portion can rotate around the line segment CL2 as a rotation axis. 10 (a) and 10 (b) show a state in which the holding tip portion exists on the back surface 30Cb side of the protective sheet 30C. In the following, the state in which each holding tip portion of the protective sheet 30C exists on the back surface 30Cb side of the protective sheet 30C is also referred to as a “back surface protruding state”. When the operator pushes each holding tip portion of the protective sheet 30C toward the back surface 30Cb side, the state of the protective sheet 30C becomes a back surface protruding state.

Further, FIG. 10B shows a state in which the side surface of the display module 100 is held (sandwiched) by the tip ends of the two holding portions Hd of the protective sheet 30C in the back surface protruding state.

Further, the two holding portions Hd of the protective sheet 30C are provided in a region inside the protective sheet 30C where the display module 100 can be sandwiched between the tip portions of the two holding portions Hd in the back surface protruding state.

In the manufacturing process of the display device 200C, the operator pushes each holding tip portion of the protective sheet 30C toward the back surface 30Cb so that the state of the protective sheet 30C is in the back surface protruding state. Then, the operator fixes the protective sheet 30C to the display module 100 so that the side surfaces of the display module 100 are held by the tips of the two holding portions Hd of the protective sheet 30C. As a result, as shown in FIG. 10B, the tip ends of the two holding portions Hd of the protective sheet 30C hold the side surface of the display module 100. That is, each holding portion Hd of the protective sheet 30C holds the side surface of the display module 100. In this case, the protective sheet 30C covers the display area Rg1 and the peripheral area Rg2 in a plan view (XY plane). That is, in the display device 200C, the display region Rg1 and the peripheral region Rg2 of the display module 100 are covered by the protective sheet 30C in a plan view (XY plane).

In the following, the configuration existing in the protective sheet 30C for fixing the protective sheet 30C to the display module 100 so that the protective sheet 30C covers the display area Rg1 and the peripheral area Rg2 in a plan view (XY plane) or The member is also referred to as a "fixed portion". In the present embodiment, the fixing portion is the holding portion Hd. That is, a fixing portion (holding portion Hd) exists on the peripheral edge portion of the protective sheet 30C.

As described above, according to the present embodiment, the protective sheet 30C has each holding portion Hd which is a part of the peripheral edge portion of the protective sheet 30C. Each holding portion Hd holds the side surface of the display module 100.

As a result, the protective sheet 30C can be fixed to the display module 100 without using the adhesive tape as in the first embodiment and the first to third modifications of the first embodiment. Therefore, the manufacturing cost of the display device 200C can be reduced.

Further, the holding portion Hd of the protective sheet 30C is generated by forming a notch in the protective sheet 30CN along the line segment CL1. Therefore, the difficulty of processing when manufacturing the protective sheet 30C is the same as the difficulty of processing when manufacturing a conventional rectangular protective sheet in which the holding portion Hd does not exist. Therefore, the protective sheet 30C can be manufactured at a cost equivalent to the manufacturing cost of the conventional protective sheet.

In the present embodiment, the direction in which the two holding portions Hd of the protective sheet 30C face each other is the X-axis direction, but the direction is not limited to this. The direction in which the two holding portions Hd of the protective sheet 30C face each other may be, for example, the Y-axis direction.

In the following, the two holding portions Hd facing each other will be referred to as a “opposing holding structure”. Further, in the following, the distance between the tip portions of the two holding portions Hd facing each other in the back surface protruding state is also referred to as “distance D1”. The interval D1 is the length of the portion of the display module 100 that is in the back surface protruding state and is sandwiched between the two opposing holding portions Hd. For example, the interval D1 is the length of the display module 100 in FIG. 10B in the X-axis direction.

In the present embodiment, the protective sheet 30C is assumed to have one facing holding structure, but the present invention is not limited to this. One protective sheet 30C may have a plurality of types of facing holding structures having different intervals D1. According to this configuration, the one protective sheet 30C can be commonly used for a plurality of types of display modules 100 having different intervals D1. Therefore, the cost can be reduced as compared with the case where a plurality of protective sheets having different intervals D1 are prepared.

The shape of the holding portion Hd is not limited to a semicircular shape. The shape of the holding portion Hd may be a shape other than a semicircular shape as long as the protective sheet 30C can be easily fixed to the display module 100.

Further, the number of holding portions Hd existing in the protective sheet 30C is not limited to 2, and may be 3 or more. The position of the holding portion Hd existing on the protective sheet 30C is not limited to the position shown in FIG. 10, and may be another position. For example, the protective sheet 30C may have two holding portions Hd facing each other in the Y-axis direction.

Further, a perforation may be provided in the line segment CL2 of the protective sheet 30C. As a result, the operator can easily push each holding tip portion of the protective sheet 30C toward the back surface 30Cb side. Therefore, the workability of the worker can be improved. Even when the protective sheet 30C is provided with perforations, the protective sheet 30C can be manufactured at the same cost as the conventional one.

In the present invention, within the scope of the invention, the modified examples of each embodiment and the embodiment may be freely combined, and the modified examples of the respective embodiments and embodiments may be appropriately modified or omitted. It is possible.

4 Adhesive tape, 5 Light source device, 11 Display panel, 12 Protective plate, 30, 30A, 30Ab, 30B, 30C Protective sheet, 200, 200A, 200Ab, 200B, 200C display device, 100 display module, Hd holder, Rg1 display Region, Rg2 peripheral region.

Claims (8)

A protective sheet for covering the display area of a display module having a display area for displaying an image and a peripheral area which is an area surrounding the display area.
At the peripheral edge of the protective sheet, there is a fixing portion for fixing the protective sheet to the display module so that the protective sheet covers the display area and the peripheral area in a plan view .
The fixing portion is a notch and
The protective sheet has a notch-side end that is an end of the protective sheet that is in contact with the notch.
The adhesive tape is attached to the notch-side end of the protective sheet so that the adhesive tape covers the notch in a plan view.
The portion of the adhesive tape that covers the notch is a protective sheet that is attached to the display module via the notch . A protective sheet for covering the display area of a display module having a display area for displaying an image and a peripheral area which is an area surrounding the display area.
At the peripheral edge of the protective sheet, there is a fixing portion for fixing the protective sheet to the display module so that the protective sheet covers the display area and the peripheral area in a plan view.
The fixing portion is a notch and
The protective sheet has a notch-side end that is an end of the protective sheet that is in contact with the notch.
The notch side end portion of the protective sheet has an outer portion which is a portion existing outside the outer shell of the display module in a plan view.
Protection sheet. The said notch end of the previous SL protective sheet, so that the adhesive tape in a plan view to cover the notch, and the adhesive tape is adhered,
The protective sheet according to claim 2 , wherein a portion of the adhesive tape that covers the notch is attached to the display module via the notch. The adhesive tape is attached to the notch-side end of the protective sheet so that the adhesive tape covers the notch in a plan view.
The aspect according to any one of claims 1 to 3 , wherein the notch side end portion of the protective sheet has a mark portion which is a mark portion for attaching the adhesive tape to the notch side end portion. Protective sheet. The protective sheet according to claim 4 , wherein the mark portion projects toward the notch in a plan view. In plan view, the size of the protective sheet, protective sheet according to claim 1 is the same as the outer size of the display module. A protective sheet for covering the display area of a display module having a display area for displaying an image and a peripheral area which is an area surrounding the display area.
At the peripheral edge of the protective sheet, there is a fixing portion for fixing the protective sheet to the display module so that the protective sheet covers the display area and the peripheral area in a plan view.
The fixing portion is a holding portion that is a part of the peripheral portion of the protective sheet.
The holding portion holds the side surface of the display module .
The holding portion is generated by forming a notch in the peripheral portion of the protective sheet.
Protection sheet. The protective sheet according to any one of claims 1 to 7, and the protective sheet.
A display device including the display module whose display area and its peripheral area are covered with the protective sheet.

Images