JP6529354B2 - Light source device and display device - Google Patents

Description

  The present invention relates to a light source device and a display device having a structure for fixing a light guide plate.

  A conventional display device (hereinafter, also referred to as “display device J”) that displays an image using liquid crystal includes a liquid crystal panel and a light source device. The liquid crystal panel is connected to the circuit substrate by flexible wiring. The display device J has a configuration in which the liquid crystal panel and the light source device are supported by a frame. Further, in the display device J, the light emitted from the light source device is irradiated to the back surface of the liquid crystal panel.

  As a method of emitting light by the light source device, there are a side light method (edge light method), a direct type, and the like. In the side light method, the light source of the light source device is disposed on the side surface of the housing of the light source device. In the direct type, the light source is disposed on the bottom surface of the housing of the light source device such that the light source of the light source device faces the back of the liquid crystal panel.

  In addition, in the light source device of a side light system, a light guide plate is generally used. The light guide plate is a member for guiding the light emitted from the light source to the opening of the housing. In a light source device having a light guide plate, light emitted from a linear light source, a side light unit, etc. is reflected in the light guide plate. The linear light source is, for example, a cold cathode tube. Further, the side light part is constituted by a plurality of point light sources arranged in a straight line. The point light source is, for example, a light emitting diode. Then, the light in the light guide plate is diffused by the diffusion pattern provided in the light guide plate. Thereby, planar light is emitted from the light guide plate.

  Hereinafter, the frame on the outer side (rear side) of the light source device is also referred to as an “outer frame”. The outer frame is a housing of the light source device.

  In the display device J including the side light type light source device, the reflection sheet is accommodated in the outer frame. Various configurations exist for the configuration of the reflective sheet housed in the outer frame. Patent Document 1 discloses a technology (hereinafter, also referred to as “related technology A”) using a reflection plate (reflection sheet) covering the side surface and the back surface of a light guide plate. Moreover, in patent document 2, the technique (it is also called the "related technology B" hereafter) using the reflective sheet which covers the back surface of a light-guide plate is disclosed.

  In the configuration in which the reflective sheet is accommodated in the outer frame, when a load such as vibration or impact is applied to the display device J from the outside, the light guide plate is likely to move inside the light source device. When the light guide plate moves, the following problems Df occur.

  The defect Df is, for example, the generation of abnormal noise. Further, the defect Df is, for example, the occurrence of a scratch on the surface of the optical sheet, the surface of the light guide plate, etc. The defect Df is, for example, the occurrence of display abnormality due to foreign matter. Further, the defect Df is the breakage of the light guide plate.

  Therefore, in order to suppress the movement of the light guide plate, it is important to fix the light guide plate. In Related Art A, the side surface of the light guide plate is fixed to the reflector by an adhesive such as a double-sided adhesive film.

  In the display device J, a gap of a predetermined size may be provided between the inner wall of the outer frame and the inner member. The internal members are a light guide plate and a reflective sheet. Hereinafter, a configuration in which a gap of a predetermined size is provided between the inner wall of the outer frame and the inner member is also referred to as “configuration Ctn”.

  In addition, in structure Ctn, in order to suppress the movement of a light-guide plate, the structure (Hereinafter, it is also called "structure Ctna") which makes the said clearance gap of structure Ctn small is also considered.

  However, in the configuration Ctna, when the light guide plate or the reflective sheet expands due to heat, a defect such as a warp of the light guide plate or a display abnormality may occur. Further, in the configuration Ctna, when the light guide plate or the reflective sheet is shrunk due to a temperature change, the clearance (clearance) becomes large. In this case, abnormal noise may occur due to rattling of the light guide plate, the reflection sheet, and the like.

  In the configuration Ctn, the light guide plate needs to be fixed in order to prevent the occurrence of the above-mentioned failure. In Related Art B, in the configuration Ctn, the reflection sheet of the light guide plate and the reflection sheet sandwiched by two frames is fixed to one of the frames by a double-sided adhesive tape.

Japanese Patent Application Laid-Open No. 8-087909 JP, 2009-199799, A (Drawing 2, paragraph 0016, paragraph 0023)

  In recent years, downsizing (thinning) of a light source device used for a display device is required. In related art A, an adhesive is applied to the entire side surface of the light guide plate. Therefore, in the related art A, the distance between the light guide plate and the frame is increased by the thickness of the adhesive. Therefore, the related art A is not suitable for miniaturizing the light source device.

  Further, in Related Art B, downsizing (thinning) of the light source device is achieved by providing a double-sided adhesive tape (adhesive) in the recess present in the reflective sheet. However, in related art B, the light guide plate is only sandwiched by two frames, and the light guide plate is not adhered to the frame by the adhesive. That is, the fixing strength of the light guide plate to the frame can not be sufficiently secured. Therefore, when the light source device vibrates, there is a problem that the light guide plate is likely to move.

  The present invention has been made to solve such problems, and in a configuration in which a reflective sheet is provided between a light guide plate and a frame, an increase in the distance between the light guide plate and the frame is suppressed while suppressing It is an object of the present invention to provide a light source device and the like capable of sufficiently securing the fixing strength of the light guide plate with respect to the frame.

  In order to achieve the above object, a light source device according to one aspect of the present invention includes a light source, a light guide plate on which light emitted from the light source is incident, a reflective sheet, and a frame. A sheet for reflecting light directed from the light guide plate to the reflection sheet, the frame holds the light guide plate and the reflection sheet, and the reflection sheet is provided between the light guide plate and the frame. The reflection sheet is provided with a penetration portion which is a portion penetrating a part of the reflection sheet, an adhesive is provided inside the penetration portion, and the light guide plate is fixed to the frame. The adhesive adheres to the light guide plate and the frame between the light guide plate and the frame.

  According to the present invention, the reflective sheet is provided between the light guide plate and the frame. The reflection sheet is provided with a penetration portion. An adhesive is provided inside the penetrating portion. The adhesive adheres to the light guide plate and the frame between the light guide plate and the frame so that the light guide plate is fixed to the frame.

  Thus, the light guide plate is fixed to the frame via the adhesive. Therefore, the fixing strength of the light guide plate to the frame can be sufficiently secured. In addition, an adhesive is provided in the inside of a penetration part. Therefore, in the configuration in which the reflective sheet is provided between the light guide plate and the frame, the fixing strength of the light guide plate to the frame can be sufficiently secured while suppressing an increase in the distance between the light guide plate and the frame.

FIG. 1 is an exploded perspective view of a display device according to Embodiment 1 of the present invention. FIG. 1 is a cross-sectional view of a display device in accordance with Embodiment 1 of the present invention. It is a developed view of a reflective sheet concerning Embodiment 1 of the present invention. It is a figure for demonstrating the deformation | transformation structure which made a part of light-guide plate deform | transformed. It is a figure for demonstrating another deformation | transformation structure which made the one part of the light-guide plate deform | transformed. It is a figure for demonstrating the deformation | transformation structure which made some flames | frames deform | transformed. It is a figure for demonstrating another deformation | transformation structure which made part of a flame | frame deform | transformed. It is sectional drawing which shows the structure of the display apparatus which concerns on Embodiment 2 of this invention. It is an expanded view of the reflective sheet which concerns on Embodiment 2 of this invention. It is sectional drawing which shows the structure of the display apparatus based on Embodiment 3 of this invention. It is an expanded view of the reflective sheet which concerns on Embodiment 3 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same components are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description about them may be omitted.

  Note that the dimensions, materials, shapes, relative arrangements, and the like of the components illustrated in the embodiments are appropriately changed according to the configuration of the apparatus to which the present invention is applied and various conditions, and the present invention is not limited thereto. It is not limited to those examples. Also, the dimensions of each component in each figure may differ from the actual dimensions.

Embodiment 1
(Overall configuration of display device)
FIG. 1 is an exploded perspective view of a display device 100 according to Embodiment 1 of the present invention. The display device 100 is, for example, a liquid crystal display device that displays an image using liquid crystal. The display device 100 is not limited to a liquid crystal display device, and may be a display device of another type. The display device 100 may be, for example, an organic EL (Electroluminescence) display. In addition, in FIG. 1, in order to simplify the drawing, the shapes of some of the components (reflection sheet 24 described later) are simplified and shown.

  In FIG. 1, the X direction, the Y direction, and the Z direction are orthogonal to one another. Each of the X direction, the Y direction and the Z direction shown in the following figures is also orthogonal to each other. In the following, a direction including the X direction and a direction (−X direction) opposite to the X direction is also referred to as “X axis direction”. Moreover, in the following, a direction including the Y direction and a direction (−Y direction) opposite to the Y direction is also referred to as “Y axis direction”. Also, in the following, a direction including the Z direction and a direction (−Z direction) opposite to the 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 “XY plane”. Further, in the following, a plane including the X-axis direction and the Z-axis direction is also referred to as "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 cross-sectional view of the display device 100 according to Embodiment 1 of the present invention. Specifically, FIG. 2 is a cross-sectional view of the display device 100 taken along the line A1-A2 of FIG.

  Referring to FIGS. 1 and 2, display device 100 includes a display panel 10, a light source device 20, a housing 3, and a circuit board CR1. Although details will be described later, the display device 100 displays an image using light emitted from the light source device 20.

  The light source device 20 is a device that emits light. The light source device 20 emits light to the back surface of the display panel 10. The display panel 10 and the light source device 20 are disposed inside the housing 3. The housing 3 has an opening 3H. In FIG. 1, a part of the display panel 10 which is visible through the opening 3H is omitted for simplification of the drawing.

  The display panel 10 is, for example, a liquid crystal panel. The display panel 10 displays an image. The circuit board CR1 is connected to the display panel 10 by the flexible wiring FL1.

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

(Display panel)
The display panel 10 is a transmissive or semi-transmissive liquid crystal panel. The display panel 10 displays an image by applying the birefringence of liquid crystal. The display panel 10 includes a substrate 11, a substrate 12, and a driving IC (Integrated Circuit) 13.

  The substrate 11 is a substrate in which a color filter, a light shielding layer, a counter electrode and the like are formed on an insulating substrate such as glass. The substrate 12 is a substrate in which pixel electrodes and the like using switching elements are formed in a matrix on an insulating substrate such as glass. The switching element is a thin film transistor (Thin Film Transistor). Hereinafter, the thin film transistor is simply referred to as "TFT".

  The driving IC 13 is disposed on a peripheral portion of the substrate 12 or on a tape-shaped wiring material connected to the peripheral portion of the substrate 12. The wiring material is, for example, TCP or COF (Chip On Film).

  Further, the display panel 10 is further provided with spacers, a sealing material, a liquid crystal, a sealing material, an alignment film, a polarizing plate, connection terminals, and the like, which are not illustrated. The spacer is a member that holds the distance between the substrate 11 and the substrate 12. The sealing material bonds the substrate 11 and the substrate 12 together. The liquid crystal is provided between the substrate 11 and the substrate 12.

  The sealing material is a member for sealing liquid crystal. The sealing material is provided at an injection port for injecting liquid crystal. The alignment film is a film for aligning liquid crystal. The polarizers are disposed on the outer surfaces of the substrate 11 and the substrate 12. The connection terminal is provided at the peripheral portion of the substrate 12. The flexible wiring FL1 is connected to the connection terminal.

(Flexible wiring)
The flexible wiring FL1 electrically connects the display panel 10 and the circuit board CR1. A copper pattern or the like is formed on the flexible wiring FL1. The flexible wiring FL1 is connected to the display panel 10 and the circuit board CR1 by a solder, an anisotropic conductive film (ACF), a connector, or the like. The flexible wiring FL1 is made of a material capable of transmitting an electrical signal. The flexible wiring FL1 is formed of, for example, a COF, an FPC, or the like.

(Circuit board)
The circuit board CR1 controls the display panel 10 and the light source by electrical input / output signals. The circuit board CR1 is configured by mounting an electronic component on a flexible printed circuit (FPC) of the flexible wiring FL1 connected to the display panel 10.

  The circuit board CR1 may be configured by forming a copper pattern on a glass epoxy or the like, and mounting an electronic component on the surface of the glass epoxy by soldering. The circuit board CR1 is mainly disposed (fixed) on the back side (the side where light is not emitted) of the display device 100.

  A protective cover (not shown) may be attached to the circuit board CR1 in order to protect the circuit board CR1 from external pressure, static electricity and the like. The protective cover is made of metal such as aluminum, stainless steel, galvanized steel sheet, or a thin resin in the form of a film such as PET (PolyEthylene Terephthalate).

  When using a metal protective cover, a resin sheet such as PET is attached to the circuit board CR1 to avoid electrical contact between the circuit board CR1 and the electronic components on the circuit board CR1. Be In this way, insulation measures can be taken.

(Light source device)
The light source device 20 emits (irradiates) light to the display panel 10 from the substrate 12 side. Referring to FIGS. 1 and 2, light source device 20 includes a light source 25, a light guide plate 23, an optical sheet portion 22, a reflective sheet 24, and frames 21F and 21B.

  The light source 25 emits light. The light guide plate 23 guides the light emitted by the light source 25 in a specific direction. The light guide plate 23 is a member for guiding light to the optical sheet unit 22. Specifically, the light guide plate 23 has a light emitting surface 23a, a back surface 23b, and a side surface 23s. The light emitting surface 23 a is a surface from which the light incident on the light guide plate 23 is emitted. The back surface 23 b is a surface of the light guide plate 23 opposite to the light emitting surface 23 a.

  The light emitted from the light source 25 is incident on the light guide plate 23. Specifically, the light emitted from the light source 25 propagates to the inside of the light guide plate 23 through the side surface 23 s of the light guide plate 23. The light propagated to the inside of the light guide plate 23 is emitted from the light emitting surface 23 a in the Z direction. That is, the light guide plate 23 emits the light emitted from the light source 25 from the light emitting surface 23 a. The display panel 10 is provided on the light emitting surface 23 a side of the light guide plate 23.

  The optical sheet portion 22 is provided on the light emitting surface 23 a of the light guide plate 23. The optical sheet unit 22 is configured of a plurality of optical sheets 2. In addition, the optical sheet part 22 may be comprised from the optical sheet 2 of 1 sheet. That is, the optical sheet unit 22 is configured of one or more optical sheets 2. The optical sheet 2 transmits light emitted from the light emitting surface 23 a (light source 25), which is used for displaying an image.

  Further, the optical sheet unit 22 controls the distribution and the spread of the light emitted from the light guide plate 23. The optical sheet unit 22 emits the light emitted from the light emitting surface 23 a to the display panel 10. The display panel 10 displays an image using light emitted from the light emitting surface 23a.

  The reflective sheet 24 is configured to cover the back surface 23 b and the side surface 23 s of the light guide plate 23. The reflective sheet 24 is a sheet that reflects light. Specifically, the reflective sheet 24 is a sheet that reflects light traveling from the light guide plate 23 toward the reflective sheet 24. Due to the presence of the reflective sheet 24, for example, light emitted from the light guide plate 23 in the −Z direction is reflected by the reflective sheet 24 and enters the light guide plate 23 again.

  The reflection sheet 24 is, for example, a white resin sheet having high light reflection performance. Moreover, the reflective sheet 24 is a metal vapor deposition sheet, for example. The said metal vapor deposition sheet is a sheet by which metal was vapor-deposited on the surface of the said metal vapor deposition sheet.

  A dot pattern may be provided on the surface of the reflective sheet 24. The dot pattern is a pattern for improving the luminance, color uniformity, and the like of planar light emitted from the light source device.

  The frame 21B is a back frame provided on the back side of the display device 100. The shape of the frame 21B is a substantially box shape having an opening. The frame 21B holds (accommodates) at least the light guide plate 23 and the reflection sheet 24 as will be described in detail later.

  The frame 21F holds the frame 21B holding the light guide plate 23 and the reflection sheet 24. That is, the frame 21F holds at least the light guide plate 23 and the reflection sheet 24. Details of the frames 21F and 21B will be described later.

  The light source 25 is a point light source that emits white light. The light source 25 is an LED (Light Emitting Diode), a laser diode (Laser Diode), or the like. The light source 25 may be a light source that emits red light (R), green light (G) and blue light (B). Moreover, the light source 25 may be a light source that emits light of colors other than RGB.

  The light source 25 is mounted on the light source substrate 26. The light source substrate 26 is a substrate configured based on a general glass epoxy resin, a substrate using a flexible flat cable, or the like. The light source substrate 26 may be a substrate configured based on metal (for example, aluminum or the like), ceramic, or the like in order to enhance heat dissipation.

  When the light source 25 is a point light source such as an LED, as the point light source, an element emitting monochromatic light such as red, green and blue, an element emitting blue light, and yellow light by the blue light There is an element or the like that emits pseudo white light which is made of a phosphor. In the present embodiment, the light source 25 will be described as an example of a point light source (LED) that emits pseudo white light.

  The light source 25 is not limited to a point light source mounted on the light source substrate 26, and may be a linear light source such as a cold cathode fluorescent lamp (CCFL (Cold Cathode Fluorescent Lamp)) or a fluorescent tube lamp.

(Light guide plate)
The light guide plate 23 is made of transparent acrylic resin, polycarbonate resin, glass or the like. For example, a scattering dot pattern, a prism-shaped portion, and the like are formed on one or both of the light emitting surface 23 a and the back surface 23 b of the light guide plate 23. The scattering dot pattern, the prism-shaped portion, and the like are for emitting light and adjusting the light intensity distribution in the plane and the light emission direction.

  Further, an optical sheet portion 22 is disposed on the light guide plate 23 in order to adjust the intensity distribution of the light and the emission angle of the light. The optical sheet unit 22 is configured of a plurality of optical sheets 2 as described above.

(Optical sheet section)
The optical sheet unit 22 is configured by arranging a necessary number of lens sheets, a diffusion sheet, a viewing angle adjustment sheet, and the like according to the purpose. The lens sheet is a sheet for condensing light. The diffusion sheet is a sheet for homogenizing light. The viewing angle adjustment sheet is a sheet for adjusting the brightness in the direction of the viewing angle. That is, each optical sheet 2 which comprises the optical sheet part 22 is either a lens sheet, a diffusion sheet, a viewing angle adjustment sheet, etc.

  In addition, the optical sheet part 22 may be comprised from the optical sheet 2 of 1 sheet as mentioned above. The optical sheet 2 is made of a resin material such as PC (Poly Carbonate) or PET (Poly Ethylene Terephthalate).

(flame)
The frame 21F is a frame-like (closed loop) mold frame. The frame 21F has an opening H1. The opening H1 is a path of light emitted from the light emitting surface 23a of the light guide plate 23. The display panel 10 is mounted and positioned on the periphery of the upper surface of the frame 21F. Thus, the display panel 10 is held by the frame 21F. The material constituting the frame 21F is a metal such as aluminum, stainless steel or iron, or a resin material such as PC (polycarbonate) or ABS (acrylonitrile butadiene styrene).

  The frame 21B is a back frame provided on the back side of the display device 100 as described above.

  The light source 25 and the light source substrate 26 are positioned on the frame 21B. That is, the frame 21 B holds the light source 25 and the light source substrate 26. In order to conduct the heat emitted from the light source 25, it is desirable to use a metal having high thermal conductivity. Therefore, the frame 21B is particularly made of aluminum or an aluminum alloy having high thermal conductivity. With this configuration, the frame 21B can efficiently diffuse the heat from the light source 25 and can lower the temperature of the light source 25. Thereby, the heat can be prevented from remaining in the light source device 20.

  The frame 21F engages with the frame 21B by, for example, an engagement portion (not shown). That is, the frame 21F is fixed to the frame 21B. The said engaging part is a hook etc., for example. The engagement portion is provided on both or one of the frame 21F and the frame 21B. By fixing the frame 21F to the frame 21B, the optical sheet portion 22, the light guide plate 23, and the reflective sheet 24 are held by the frame 21F and the frame 21B. The frame 21F and the frame 21B may be integrated.

(Housing)
The housing 3 is a frame-shaped (frame-shaped) member. The housing 3 holds the display panel 10, the light source device 20, the circuit board CR1, and the like. The housing 3 is made of a thin plate metal, a resin molded product or the like. The housing 3 is fixed to the frame 21F of the light source device 20 by a claw-shaped fixing structure, screwing, or the like. The claw-like fixing structure is a structure in which claw-like projections provided on each of the housing 3 and the frame 21F engage with each other.

  The housing 3 may be integrally formed or may be configured by combining a plurality of members. Moreover, you may provide the attachment part (a screw, an attachment hole, etc.) to the final product in the side surface, front, back, or peripheral part etc. of the housing | casing 3. FIG.

(Characteristic configuration)
Next, the characteristic configuration (hereinafter also referred to as “feature configuration N1”) in the present embodiment will be described in detail. The reflective sheet 24 according to the characteristic configuration N1 is configured to cover the back surface 23b of the light guide plate 23 and the three side surfaces 23s of the four side surfaces 23s of the light guide plate 23. The reflective sheet 24 has three side portions 24s. That is, the shape of the reflective sheet 24 is a box shape having three side portions 24s.

  FIG. 3 is a development view of the reflective sheet 24 according to the first embodiment of the present invention. Specifically, FIG. 3 is a plan view showing the shape of the box-shaped reflection sheet 24. As shown in FIG. In addition, the thickness of the reflective sheet 24 of the state of FIG. 3 is uniform.

  Referring to FIG. 3, a line Ln1 shown in the reflective sheet 24 is a line for bending a portion of the line Ln1 in the reflective sheet 24. The reflection sheet 24 of FIG. 2 is obtained by deforming the reflection sheet 24 of FIG. 3 in accordance with the line Ln1 such that the three side portions 24s of the reflection sheet 24 of FIG. 3 are parallel to the Z-axis direction.

  Referring to FIGS. 2 and 3, the reflection sheet 24 is provided with a through portion H2. The penetration part H2 is a part which penetrates a part of reflective sheet 24. As shown in FIG. The penetration part H2 is a hole (penetration hole), for example. In addition, the penetration part H2 may be a notch.

  The frame 21B is configured to cover the back surface 23b and the side surface 23s of the light guide plate 23, as shown in FIG. In addition, the reflective sheet 24 is provided between the light guide plate 23 and the frame 21B. Specifically, the reflective sheet 24 is configured to be in contact with the back surface 23 b and the side surface 23 s of the light guide plate 23.

  The display device 100 has a display area Rd1. The display area Rd1 is an area where the display device 100 displays an image. The shape of the display area Rd1 in a plan view (XY plane) is a rectangular shape. The size of the display region Rd1 in plan view (XY plane) is smaller than the size of the light guide plate 23 in plan view (XY plane). Further, the display region Rd1 in a plan view (XY plane) is provided inside the outline of the light guide plate 23 in a plan view (XY plane).

  In the following, in the planar view (XY plane), a portion of the light guide plate 23 overlapping the area around the display region Rd1 is also referred to as “light guide plate peripheral portion”. The light guide plate peripheral portion is a peripheral portion of the light guide plate 23. The light guide plate peripheral portion is a portion overlapping the region outside the display region Rd1 in the light guide plate 23 in plan view (XY plane). That is, in the plan view (XY plane), the light guide plate peripheral portion does not overlap the display region Rd1.

  The penetrating portion H2 is provided on the back surface 23b side of the light guide plate 23. Specifically, the reflection sheet 24 is provided so that the penetration part H2 of the reflection sheet 24 exists between the back surface 23b and the frame 21B.

  Further, the through portion H2 is provided in a region overlapping the peripheral portion (light guide plate peripheral portion) of the light guide plate 23 in the reflection sheet 24 in plan view (XY plane). That is, the penetration part H2 is provided in the area | region which does not overlap with display area Rd1 among the reflective sheets 24 in planar view (XY surface).

  Further, as shown in FIG. 2, an adhesive 50 is provided inside the through portion H2. The adhesive 50 is, for example, a double-sided tape, an adhesive, or the like. The adhesive 50 adheres to the light guide plate 23 and the frame 21B between the light guide plate 23 and the frame 21B so that the light guide plate 23 is fixed to the frame 21B. That is, the light guide plate 23 is fixed to the frame 21 B by the adhesive 50.

  Hereinafter, a portion of the reflective sheet 24 in contact with the through portion H2 is also referred to as a “through peripheral portion”. Moreover, in the following, the region of the member to which the adhesive 50 is in contact is also referred to as a “pressure-sensitive adhesive disposition region”. The pressure-sensitive adhesive disposition area is, for example, a region of the light guide plate 23 to which the pressure-sensitive adhesive 50 adheres. Further, the adhesive disposition area is, for example, an area to which the adhesive 50 adheres in the frame 21B.

  The thickness of the adhesive 50 is the same as or equivalent to the thickness of the penetrating peripheral portion of the reflective sheet 24. That is, the thickness of the adhesive 50 is the same as or equivalent to the depth of the penetrating portion H2. Thereby, in the display device 100 (the light source device 20), it is possible to suppress an increase in the thickness of the adhesive disposition region in a plan view (XY plane).

  As described above, according to the present embodiment, the reflection sheet 24 is provided between the light guide plate 23 and the frame 21B. The reflection sheet 24 is provided with a through portion H2. An adhesive 50 is provided inside the through portion H2. The adhesive 50 adheres to the light guide plate 23 and the frame 21B between the light guide plate 23 and the frame 21B so that the light guide plate 23 is fixed to the frame 21B.

  Thus, the light guide plate 23 is fixed to the frame 21B via the adhesive 50. Therefore, the fixing strength of the light guide plate 23 with respect to the frame 21B can be sufficiently secured. In addition, the adhesive 50 is provided in the inside of the penetration part H2. Therefore, in the configuration in which the reflection sheet 24 is provided between the light guide plate 23 and the frame 21B, the fixing strength of the light guide plate 23 with respect to the frame 21B is sufficient while suppressing an increase in the distance between the light guide plate 23 and the frame 21B. Can be secured.

  Further, according to the present embodiment, the light guide plate 23 is fixed to the frame 21 B by the adhesive 50. Therefore, the light guide plate 23 is firmly fixed to the frame 21B. Therefore, even if a load such as vibration or impact is applied to the display device 100 from the outside, movement of the light guide plate 23 in the light source device 20 can be suppressed.

  Further, according to the present embodiment, the light guide plate 23 is fixed to the frame 21B without the reflection sheet 24 interposed. Therefore, the number of adhesive disposition areas can be reduced.

  Further, according to the present embodiment, the thickness of the adhesive 50 is the same as or equivalent to the thickness of the penetrating peripheral portion of the reflective sheet 24. That is, the thickness of the adhesive 50 is the same as or equivalent to the depth of the penetrating portion H2. Thereby, the increase in the thickness of the adhesive agent arrangement | positioning area | region of the display apparatus 100 (light source device 20) can be suppressed.

  Further, according to the present embodiment, the through portion H2 is provided in a region not overlapping the display region Rd1 in the reflective sheet 24 in a plan view (XY plane). That is, the adhesive 50 is provided in a region of the reflective sheet 24 which does not overlap the display region Rd1 in a plan view (XY plane). Thereby, the luminance of the light emitted from the light source device 20 and passing through the display region Rd1 can be made uniform.

  In addition, even when a load such as vibration or impact is applied to the display device 100 from the outside, the area of the adhesive 50 is required to reliably maintain the light guide plate 23 fixed to the frame 21B. The larger the better. In the present embodiment, the arrangement area of the pressure-sensitive adhesive 50, the number of the pressure-sensitive adhesives 50, and the arrangement position of the pressure-sensitive adhesive 50 are not limited to the above, and may be arbitrary positions.

  In addition, the adhesive 50 is not limited to a double-sided tape, an adhesive agent, etc. The adhesive 50 may be a member capable of fixing the light guide plate 23 to the frame 21B other than a double-sided tape, an adhesive, and the like. Moreover, the material which comprises the adhesive 50 may be any material which can fix the light-guide plate 23 to flame | frame 21B. The shape of the adhesive 50 may be any shape that can fix the light guide plate 23 to the frame 21B.

  Hereinafter, the light emitted from the light source device 20 is also referred to as “light source device light”. Also, in the following, the property of diffusing light is also referred to as “diffusion property”. Further, in the following, a member having a diffusion property is also referred to as a “diffusion property member”. Also, in the following, the characteristic of reflecting light is also referred to as "reflection characteristic". Moreover, in the following, a member having a reflection characteristic is also referred to as a "reflection characteristic member".

  In the present embodiment, the adhesive 50 may be used to control the uniformity of the luminance of the light source device light (hereinafter, also referred to as “deformed configuration N1”). The adhesive 50 in the modified configuration N1 includes one or more diffusion members. The diffusion member is a member having one or both of a diffusion characteristic and a reflection characteristic. The diffusion member is composed of one or both of the diffusion characteristic portion and the reflection characteristic member. The diffusion member is, for example, a substrate, particles, or the like. One or more diffusion members included in the adhesive 50 function as a diffusion pattern.

  In the modified configuration N1, for example, by adjusting the number of diffusion members included in the adhesive 50, the size of the diffusion members included in the adhesive 50, and the like, the diffusion characteristics, reflection characteristics, and the like of the light source device light are adjusted. . Therefore, the uniformity of the luminance of the light source device light can be controlled by adjusting the diffusion characteristic, the reflection characteristic, and the like.

  Further, in the present embodiment, the frame 21B may be used to control the uniformity of the luminance of the light source device light (hereinafter, also referred to as a “deformed configuration N2”). In the following, the area of the frame 21B to which the adhesive 50 is attached is also referred to as “adhesive placement area Rfb”. The pressure-sensitive adhesive disposition area Rfb is, for example, an area to which the pressure-sensitive adhesive 50 adheres in the frame 21B of FIG.

  In the modified configuration N2, a diffusion member is provided in the adhesive disposition area Rfb of the frame 21B. The diffusion member is, for example, a diffusion pattern provided in the adhesive disposition region Rfb by printing or the like. The diffusing member of the modified configuration N2 is the same as the diffusing member of the modified configuration N1. That is, the diffusion member of the modified configuration N2 is a member having one or both of the diffusion characteristic and the reflection characteristic.

  In the modified configuration N2, for example, the diffusion characteristic, the reflection characteristic, and the like of the light source device light are adjusted by adjusting the size of the diffusion member, the shape of the diffusion member, and the like. Therefore, the uniformity of the luminance of the light source device light can be controlled by adjusting the diffusion characteristic, the reflection characteristic, and the like.

  In the following, the area of the light guide plate 23 to which the adhesive 50 is attached is also referred to as “adhesive placement area Rpt”. The adhesive disposition area Rpt is, for example, an area to which the adhesive 50 adheres in the light guide plate 23 of FIG. Moreover, in the following, the thickness of the pressure-sensitive adhesive 50 is also referred to as “pressure-sensitive adhesive thickness”. In addition, as mentioned above, the part which contact | connects the penetration part H2 among the reflective sheets 24 is also called "the penetration peripheral part."

  The adhesive thickness is the same as or equivalent to the thickness of the penetrating peripheral portion of the reflective sheet 24, but the adhesive thickness may be different from the thickness of the penetrating peripheral portion of the reflective sheet 24. In the following, the thickness of the penetrating peripheral portion is also referred to as "penetrating peripheral thickness".

  Next, a configuration for causing the adhesive 50 to adhere to both the light guide plate 23 and the frame 21B will be described according to the thickness of the adhesive.

  In the following, the situation in which the thickness of the adhesive is smaller than the thickness around the penetration is also referred to as "the situation Sta1." Further, in the following, a configuration in which a part of the light guide plate 23 is deformed in order to cause the adhesive 50 to adhere to both the light guide plate 23 and the frame 21B in the situation Sta1 is also referred to as “deformed structure N3a1”. .

  FIG. 4 is a view for explaining a modified configuration N3a1 in which a part of the light guide plate 23 is deformed. Referring to FIG. 4, in the modified configuration N3a1, a convex portion 23X corresponding to the thickness of the adhesive 50 is provided in the adhesive disposition region Rpt of the light guide plate 23. Specifically, in the modified configuration N3a1, the convex portion 23X is formed on the light guide plate 23. The convex portion 23X is formed, for example, by causing the back surface 23b side of the light guide plate 23 to protrude in the -Z direction.

  The convex portion 23X is configured to cause the adhesive 50 to adhere to both the light guide plate 23 and the frame 21B in a situation Sta1 in which the adhesive thickness is smaller than the penetration peripheral thickness. In the following, the thickness obtained by adding the thickness of the convex portion 23X to the adhesive thickness in the situation Sta1 is also referred to as “convex portion addition thickness Th1a”. Specifically, the thickness of the convex portion 23X is set such that the convex portion addition thickness Th1a is equal to or equivalent to the penetration peripheral thickness in the situation Sta1.

  In the following, the situation in which the thickness of the adhesive is larger than the thickness around the penetration is also referred to as "a situation Stb1". Further, in the following description, a configuration in which a part of the light guide plate 23 is deformed in order to cause the adhesive 50 to adhere to both the light guide plate 23 and the frame 21B in the situation Stb1 is also referred to as a “deformed configuration N3b1”. .

  FIG. 5 is a view for explaining a modified configuration N3b1 in which a part of the light guide plate 23 is deformed. Referring to FIG. 5, in the modified configuration N3 b 1, a recess 23 V corresponding to the thickness of the adhesive 50 is provided in the adhesive disposition region Rpt of the light guide plate 23. The recess 23 </ b> V is a recess provided in a part of the light guide plate 23.

  The recess 23V is configured to cause the adhesive 50 to adhere to both the light guide plate 23 and the frame 21B in a situation Stb1 in which the adhesive thickness is larger than the penetration peripheral thickness. The adhesive 50 in the modified configuration N3b1 is adhered to the bottom surface of the recess 23V.

  In the following, the distance from the adhesive disposition area Rfb of the frame 21B to the bottom surface of the recess 23V of the light guide plate 23 is also referred to as "distance db1". The distance db1 is, for example, a distance in the Z-axis direction from the adhesive disposition area Rfb of the frame 21B to the bottom surface of the recess 23V of the light guide plate 23 in FIG.

  Specifically, the recess 23V is configured such that the distance db1 is the same as or equivalent to the adhesive thickness in the situation Stb1.

  In the following, a configuration in which a part of the frame 21B is deformed in order to cause the adhesive 50 to adhere to both the light guide plate 23 and the frame 21B in the above-mentioned situation Sta1 is also referred to as "deformed configuration N3a2."

  FIG. 6 is a view for explaining a modified structure N3a2 in which a part of the frame 21B is deformed. Referring to FIG. 6, in the modified configuration N3a2, a convex portion 21BX corresponding to the thickness of the adhesive 50 is provided in the adhesive disposition region Rfb of the frame 21B. Specifically, in the modified configuration N3a2, the convex portion 21BX is formed on the frame 21B. The convex portion 21BX is formed, for example, by projecting a part of the frame 21B (pressure sensitive adhesive disposition area Rfb) in the Z direction.

  The convex portion 21BX is configured to cause the adhesive 50 to adhere to both the light guide plate 23 and the frame 21B in a situation Sta1 in which the adhesive thickness is smaller than the penetration peripheral thickness. In the following, the thickness obtained by adding the thickness of the convex portion 21BX to the adhesive thickness in the situation Sta1 is also referred to as “convex portion addition thickness Th2a”. Specifically, the thickness of the convex portion 21BX is set such that the convex portion addition thickness Th2a is equal to or equivalent to the penetration peripheral thickness in the situation Sta1.

  In the following, a configuration in which a part of the frame 21B is deformed in order to cause the adhesive 50 to adhere to both the light guide plate 23 and the frame 21B in the above-described situation Stb1 is also referred to as "deformed configuration N3b2."

  FIG. 7 is a view for explaining a modified configuration N3b2 in which a part of the frame 21B is deformed. Referring to FIG. 7, in the modified configuration N3b2, a recess 21BV corresponding to the thickness of the adhesive 50 is provided in the adhesive disposition region Rfb of the frame 21B. The recess 21BV is a recess provided in a part of the frame 21B (adhesive placement area Rfb).

  The recess 21BV is configured to cause the adhesive 50 to adhere to both the light guide plate 23 and the frame 21B in the situation Stb1 in which the adhesive thickness is larger than the penetration peripheral thickness. The adhesive 50 in the modified configuration N3b2 is adhered to the bottom surface of the recess 21BV.

  In the following, the distance from the bottom surface of the recess 21BV of the frame 21B to the adhesive disposition region Rpt of the light guide plate 23 is also referred to as "the distance db2." The distance db2 is, for example, the distance in the Z-axis direction from the bottom surface of the recess 21BV of the frame 21B to the adhesive disposition region Rpt of the light guide plate 23 in FIG.

  Specifically, the recess 21BV is configured such that the distance db2 is the same as or equivalent to the thickness of the adhesive in the situation Stb1.

  According to the thickness of the adhesive, the adhesive 50 can be adhered to both the light guide plate 23 and the frame 21B by the modified configuration N3a1, the modified configuration N3b1, the modified configuration N3a2, the modified configuration N3b2 and the like as described above.

  The convex portion 23X of the modified configuration N3a1, the concave portion 23V of the modified configuration N3b1, the convex portion 21BX of the modified configuration N3a2, and the concave portion 21BV of the modified configuration N3b2 serve as marks for providing the adhesive 50 when assembling the light source device 20. It may be used.

  In the display apparatus J to which the above-described configuration Ctn is applied, in order to fix the back surface of the light guide plate to the outer frame, for example, the following configuration CtnJ is obtained. The configuration CtnJ is configured to provide an adhesive such as double-sided tape between the light guide plate and the reflective sheet, and between the reflective sheet and the outer frame.

  Specifically, the back surface of the light guide plate is fixed to the top surface of the reflective sheet by an adhesive. Moreover, in the said structure CtnJ, the back surface of a reflective sheet is fixed to the bottom face of an outer side frame with an adhesive. That is, in the configuration CtnJ, two adhesives overlap in the vertical direction. Therefore, in the configuration CtnJ, there is a problem that the thickness of the light source device is increased due to the thickness of the two pressure-sensitive adhesives. Moreover, in structure CtnJ, there exists a problem that an adhesive needs to be provided in two places.

  In the related art A described above, the adhesive is applied to the entire side surface of the light guide plate. Therefore, in the related art A, there is a problem that the size of the frame of the display device is increased by the thickness of the adhesive.

  Therefore, the light source device 20 of the present embodiment is configured as described above. Therefore, each of the above problems can be solved by the configuration of the light source device 20 in the present embodiment.

Second Embodiment
The configuration of the present embodiment is a configuration in which a through portion is provided in the side surface portion of the reflection sheet (hereinafter, also referred to as “deformed configuration A1”). Hereinafter, the light source device to which the modified configuration A1 is applied is also referred to as “light source device 20A”. Also, in the following, the display device to which the modified configuration A1 is applied is also referred to as “display device 100A”.

  FIG. 8 is a cross-sectional view showing a configuration of a display device 100A according to Embodiment 2 of the present invention. FIG. 8 shows the configuration of the display device 100A at the same position as the position where the configuration of FIG. 2 is provided. That is, FIG. 8 is a cross-sectional view of the display device 100A to which the modified configuration A1 is applied, taken along line A1-A2 of FIG.

  The display device 100A is different from the display device 100 of FIG. 2 in that a light source device 20A is provided instead of the light source device 20. The other configuration of display device 100A is the same as that of display device 100, and therefore detailed description will not be repeated.

  The light source device 20A is different from the light source device 20 in that the light source device 20A includes a reflection sheet 24A instead of the reflection sheet 24. The other configuration of light source device 20A is the same as that of light source device 20, and therefore detailed description will not be repeated.

  The reflective sheet 24A differs from the reflective sheet 24 in that it has a through portion H2s instead of the through portion H2. Other configurations and functions of the reflective sheet 24A are the same as those of the reflective sheet 24, and therefore the detailed description will not be repeated. That is, the shape of the reflective sheet 24A is a box shape having three side portions 24s.

  FIG. 9 is a developed view of a reflective sheet 24A according to Embodiment 2 of the present invention. Specifically, FIG. 9 is a plan view showing the shape of the box-shaped reflection sheet 24A. The reflection sheet 24A of FIG. 8 is obtained by deforming the reflection sheet 24A of FIG. 9 according to the line Ln1 such that the three side portions 24s of the reflection sheet 24A of FIG. 9 are parallel to the Z-axis direction.

  Referring to FIG. 8 and FIG. 9, the reflection sheet 24A is provided with a through portion H2s. Specifically, a through portion H2s is provided in the side surface portion 24s of the reflective sheet 24A.

  The penetration part H2s is a part which penetrates a part of reflective sheet 24A. The penetrating portion H2s is, for example, a hole (through hole). The penetrating portion H2s may be a notch.

  The frame 21B is configured to cover the back surface 23b and the side surface 23s of the light guide plate 23, as shown in FIG. In addition, the reflective sheet 24A is provided between the light guide plate 23 and the frame 21B. Specifically, the reflective sheet 24A is configured to be in contact with the back surface 23b and the side surface 23s of the light guide plate 23.

  The penetrating portion H2s is provided on the side surface 23s of the light guide plate 23. Specifically, the reflective sheet 24A is provided between the side surface 23s of the light guide plate 23 and the frame 21B such that the through portion H2s of the reflective sheet 24A is present.

  Further, the through portion H2s is provided in a region overlapping with the peripheral portion (the above-described light guide plate peripheral portion) of the light guide plate 23 in the reflection sheet 24A in plan view (XY plane). That is, the penetration part H2s is provided in the area | region which does not overlap with display area Rd1 among reflective sheet 24A in planar view (XY surface).

  Further, as shown in FIG. 8, an adhesive 50 is provided inside the through portion H2s. The adhesive 50 in the modified configuration A1 is the same as the adhesive 50 in the characteristic configuration N1. The adhesive 50 adheres to the light guide plate 23 and the frame 21B between the light guide plate 23 and the frame 21B so that the light guide plate 23 is fixed to the frame 21B. That is, the light guide plate 23 is fixed to the frame 21 B by the adhesive 50.

  Hereinafter, a portion of the reflective sheet 24A in contact with the through portion H2s is also referred to as a "through peripheral portion". In addition, as mentioned above, the area | region of the member which the adhesive 50 is adhering is also called "the adhesive arrangement | positioning area | region."

  The thickness of the adhesive 50 is the same as or equivalent to the thickness of the penetrating peripheral portion of the reflection sheet 24A. That is, the thickness of the adhesive 50 is the same as or equivalent to the depth of the penetrating portion H2s. Thereby, in the display device 100A (the light source device 20A), it is possible to suppress an increase in the size in the X-axis direction of the peripheral portion (frame) of the display region Rd1.

  As described above, according to the present embodiment, the reflection sheet 24A is provided between the side surface 23s of the light guide plate 23 and the frame 21B such that the through portion H2s of the reflection sheet 24A exists. Further, the adhesive 50 adheres to the light guide plate 23 and the frame 21B between the light guide plate 23 and the frame 21B so that the light guide plate 23 is fixed to the frame 21B. That is, the light guide plate 23 is fixed to the frame 21 B by the adhesive 50.

  Therefore, the light guide plate 23 is firmly fixed to the frame 21B. Therefore, even if a load such as vibration or impact is applied to the display device 100A from the outside, movement of the light guide plate 23 in the light source device 20A can be suppressed.

  Further, the same effect as that of the first embodiment can be obtained by the modified configuration A1 of the present embodiment. That is, in the configuration in which the reflective sheet 24A is provided between the light guide plate 23 and the frame 21B, the fixing strength of the light guide plate 23 with respect to the frame 21B is sufficient while suppressing an increase in the distance between the light guide plate 23 and the frame 21B. Can be secured.

  Further, according to the present embodiment, the light guide plate 23 is fixed to the frame 21B without the reflection sheet 24A. Therefore, the number of adhesive disposition areas can be reduced.

  Further, according to the present embodiment, the thickness of the adhesive 50 is the same as or equivalent to the depth of the penetrating portion H2s. Thereby, in the display device 100A (the light source device 20A), it is possible to suppress an increase in the size in the X-axis direction of the peripheral portion (frame) of the display region Rd1.

  In the following, the light emitted from the light source device 20A is also referred to as "light source device light".

  Note that the adhesive 50 in the modified configuration A1 of the present embodiment may be the adhesive 50 of the above-described modified configuration N1. The adhesive 50 of the modified configuration N1 includes one or more diffusion members as described above. The diffusion member is a member having one or both of the diffusion characteristic and the reflection characteristic as described above. Thereby, also in the modified configuration A1 of the present embodiment, the effect of the modified configuration N1 can be obtained.

  Further, the above-described modified configuration N2 may be applied to the modified configuration A1 of the present embodiment. As described above, in the modified configuration N2, the diffusion member is provided in the adhesive disposition area Rfb of the frame 21B. The pressure-sensitive adhesive disposition area Rfb is, for example, an area to which the pressure-sensitive adhesive 50 adheres in the frame 21B of FIG. Thereby, also in the modified configuration A1 of the present embodiment, the effect of the modified configuration N2 can be obtained.

  As described above, the region of the light guide plate 23 to which the adhesive 50 is attached is also referred to as “adhesive placement region Rpt”. The adhesive disposition area Rpt is, for example, an area to which the adhesive 50 adheres in the light guide plate 23 of FIG. Further, as described above, the thickness of the adhesive 50 is also referred to as “adhesive thickness”. In addition, as mentioned above, the part which contact | connects penetration part H2s among reflective sheet 24A is also called "penetration periphery part." Also, in the following, the thickness of the penetrating peripheral portion is also referred to as "penetrating peripheral thickness".

  In the present embodiment, the adhesive thickness is the same as or equivalent to the thickness of the penetrating peripheral portion of the reflective sheet 24A, but the adhesive thickness may be different from the thickness of the penetrating peripheral portion of the reflective sheet 24A.

  That is, the above-described modified configuration N3a1 may be applied to the modified configuration A1 of the present embodiment (hereinafter, “modified configuration AN3a1”).

  In the modified configuration AN3a1, in the pressure-sensitive adhesive disposition region Rpt of the light guide plate 23, the convex portion 23X corresponding to the thickness of the pressure-sensitive adhesive 50 is provided. Specifically, in the modified configuration AN3a1, the convex portion 23X is formed on the light guide plate 23. The protrusion 23X in the modified configuration AN3a1 is formed, for example, by causing the side surface 23s of the light guide plate 23 to protrude in the X direction. The configuration of the convex portion 23X in the modified configuration AN3a1 is the configuration described in the modified configuration N3a1, and thus the detailed description will not be repeated. In addition, the shape of the convex part 23X in deformation | transformation structure AN3 a1 is the same as that of the convex part 23X of FIG. 4, for example.

  In addition, the above-described modified configuration N3b1 may be applied to the modified configuration A1 of the present embodiment (hereinafter, “modified configuration AN3b1”). In the modified configuration AN 3 b 1, the concave portion 23 V corresponding to the thickness of the adhesive 50 is provided in the adhesive disposition region Rpt of the light guide plate 23. The recess 23V in the modified configuration AN3b1 is a recess provided on the side surface 23s of the light guide plate 23. The configuration of recess 23V in modified configuration AN3b1 is the configuration described in modified configuration N3b1, and therefore detailed description will not be repeated. In addition, the shape of the recessed part 23V in deformation | transformation structure AN3 b1 is the same as that of the recessed part 23V of FIG. 5, for example.

  In addition, the above-described modified configuration N3a2 may be applied to the modified configuration A1 of the present embodiment (hereinafter, “modified configuration AN3a2”). In the modified configuration AN3a2, in the pressure-sensitive adhesive disposition area Rfb of the frame 21B, the convex portion 21BX corresponding to the thickness of the pressure-sensitive adhesive 50 is provided. Specifically, in the modified configuration AN3a2, the convex portion 21BX is formed on the frame 21B. The convex portion 21BX in the modified configuration AN3a2 is formed, for example, by causing the side surface portion of the frame 21B to protrude in the -X direction. The configuration of the convex portion 21BX in the modified configuration AN3a2 is the configuration described in the modified configuration N3a2, and thus the detailed description will not be repeated. In addition, the shape of convex part 21BX in deformation | transformation structure AN3 a2 is the same as that of the convex part 21 BX of FIG. 6, for example.

  In addition, the above-described modified configuration N3b2 may be applied to the modified configuration A1 of the present embodiment (hereinafter, “modified configuration AN3b2”). In the modified configuration AN3b2, the concave portion 21BV corresponding to the thickness of the adhesive 50 is provided in the adhesive disposition area Rfb of the frame 21B. The recess 21BV in the modified configuration AN3b2 is a recess provided inside the side surface portion of the frame 21B. The configuration of the recess 21BV in the modified configuration AN3b2 is the configuration described in the modified configuration N3b2, and thus the detailed description will not be repeated. In addition, the shape of the recessed part 21BV in deformation | transformation structure AN3 b2 is the same as that of the recessed part 21 BV of FIG. 7, for example.

  According to the thickness of the adhesive, the adhesive 50 can be adhered to both the light guide plate 23 and the frame 21B by the modified configuration AN3a1, the modified configuration AN3b1, the modified configuration AN3a2, the modified configuration AN3b2 and the like as described above.

Embodiment 3
The configuration of the present embodiment is a configuration in which a through portion is provided on the upper portion of a reflection sheet configured to cover the light emitting surface of the light guide plate (hereinafter, also referred to as “deformed configuration B1”). Hereinafter, the light source device to which the modified configuration B1 is applied is also referred to as "light source device 20B". Also, in the following, a display device to which the modified configuration B1 is applied is also referred to as a “display device 100B”.

  FIG. 10 is a cross-sectional view showing a configuration of a display device 100B according to Embodiment 3 of the present invention. FIG. 10 shows the configuration of the display device 100B at the same position as the position where the configuration of FIG. 2 is provided. That is, FIG. 10 is a cross-sectional view of the display device 100B to which the modified configuration B1 is applied, taken along line A1-A2 of FIG.

  The display device 100B is different from the display device 100 of FIG. 2 in that the light source device 20B is provided instead of the light source device 20. The remaining configuration of display device 100B is similar to that of display device 100, and therefore detailed description will not be repeated.

  The light source device 20B is different from the light source device 20 in that a reflective sheet 24B is provided instead of the reflective sheet 24. The other configuration of the light source device 20B is the same as that of the light source device 20, and thus the detailed description will not be repeated.

  The reflective sheet 24B is different from the reflective sheet 24 in that the reflective sheet 24B further has three upper surface portions 24u and a point having a through portion H2u instead of the through portion H2. The other configurations and functions of the reflective sheet 24B are the same as those of the reflective sheet 24, and therefore the detailed description will not be repeated.

  The three upper surface portions 24 u are parts of the reflective sheet 24 </ b> B. The three upper surface portions 24 u are respectively connected to the three side surface portions 24 s. The three upper surface portions 24 u are parallel to the light emitting surface 23 a (XY plane). That is, the shape of the reflective sheet 24B is a box shape having three side portions 24s.

  FIG. 11 is a development view of a reflective sheet 24B according to Embodiment 3 of the present invention. Specifically, FIG. 11 is a plan view showing the shape of the box-shaped reflective sheet 24B. As described above, the three upper surface portions 24 u are respectively connected to the three side surface portions 24 s. Referring to FIG. 11, a line Ln2 shown in the reflective sheet 24B is a line for bending a portion of the line Ln2 in the reflective sheet 24B.

  In the reflective sheet 24B of FIG. 10, the three side portions 24s of the reflective sheet 24B of FIG. 11 are parallel to the Z-axis direction, and the three upper surface portions 24u of FIG. 11 are parallel to the light emitting surface 23a. The reflection sheet 24B of FIG. 11 is deformed according to the lines Ln1 and Ln2.

  In FIG. 10, in order to make the configuration of the through portion H2u easy to understand, the sizes of some components are shown to be different from those in FIG. The sizes of some of the components are, for example, the thickness of the upper portion of the frame 21F, the thickness of the optical sheet 2, and the like. In addition, in FIG. 2 and FIG. 10, each member (for example, flame | frame 21F, the optical sheet 2) to which the same code | symbol is attached | subjected actually has the same size and the same shape.

  Referring to FIG. 10 and FIG. 11, the reflection sheet 24B is provided with a through portion H2u. Specifically, a through portion H2u is provided in the upper surface portion 24u of the reflective sheet 24B.

  The penetration part H2u is a part which penetrates a part of reflective sheet 24B. The penetrating portion H2u is, for example, a hole (through hole). The through portion H2u may be a notch.

  The frame 21B is configured to cover the back surface 23b and the side surface 23s of the light guide plate 23, as shown in FIG. In addition, the reflective sheet 24B is provided between the light guide plate 23 and the frame 21B. In addition, the reflective sheet 24B is configured to cover the above-described light guide plate peripheral portion. Specifically, the reflective sheet 24B is configured to be in contact with the back surface 23b, the side surface 23s, and the light emitting surface 23a of the light guide plate 23.

  Further, the shape of the frame 21F in a plan view (XY plane) is a frame shape (closed loop shape). Further, the frame 21F holds the light guide plate 23 and the reflection sheet 24B. The frame 21F is configured to cover the peripheral portion of the light emitting surface 23a of the light guide plate 23.

  Specifically, the frame 21F is configured to cover the side surface of the frame 21B and the peripheral portion (light guide peripheral portion) of the light guide plate 23. Thus, the reflective sheet 24B is provided between the light guide plate 23 and the frame 21F.

  The penetrating portion H2u is provided on the light emitting surface 23a side of the light guide plate 23. Specifically, the reflective sheet 24B is provided such that a through portion H2u of the reflective sheet 24B is present between the peripheral portion of the light emitting surface 23a and the frame 21F.

  In addition, the through portion H2u is provided in a region overlapping the peripheral edge portion (the light guide plate peripheral edge portion described above) of the light guide plate 23 in the reflective sheet 24B in plan view (XY plane). That is, the penetration part H2u is provided in the area | region which does not overlap with display area Rd1 among reflective sheet 24B in planar view (XY surface).

  Further, as shown in FIG. 10, an adhesive 50 is provided inside the through portion H2u. The adhesive 50 in the modified configuration B1 is the same as the adhesive 50 in the characteristic configuration N1. The adhesive 50 adheres to the light guide plate 23 and the frame 21F between the light guide plate 23 and the frame 21F so that the light guide plate 23 is fixed to the frame 21F. That is, the light guide plate 23 is fixed to the frame 21F by the adhesive 50.

  Hereinafter, a portion of the reflective sheet 24B in contact with the through portion H2u is also referred to as a “through peripheral portion”. In addition, as mentioned above, the area | region of the member which the adhesive 50 is adhering is also called "the adhesive arrangement | positioning area | region."

  The thickness of the adhesive 50 is the same as or equivalent to the thickness of the penetrating peripheral portion of the reflective sheet 24B. That is, the thickness of the adhesive 50 is the same as or equivalent to the depth of the through portion H2u. Thereby, in the display device 100B (the light source device 20B), it is possible to suppress an increase in the thickness of the adhesive disposition region in a plan view (XY plane). That is, in the display device 100B (the light source device 20B), an increase in the thickness of the peripheral portion (frame) of the display region Rd1 can be suppressed.

  As described above, according to the present embodiment, the reflective sheet 24B is provided such that the through portion H2u of the reflective sheet 24B is present between the peripheral portion of the light emitting surface 23a and the frame 21F. Further, the adhesive 50 adheres to the light guide plate 23 and the frame 21F between the light guide plate 23 and the frame 21F so that the light guide plate 23 is fixed to the frame 21F. That is, the light guide plate 23 is fixed to the frame 21F by the adhesive 50.

  Therefore, the light guide plate 23 is firmly fixed to the frame 21F. Therefore, even if a load such as vibration or impact is applied to the display device 100B from the outside, movement of the light guide plate 23 in the light source device 20B can be suppressed.

  Further, the same effect as that of the first embodiment can be obtained by the modified configuration B1 of the present embodiment. That is, in the configuration in which the reflective sheet 24B is provided between the light guide plate 23 and the frame 21F, the fixing strength of the light guide plate 23 with respect to the frame 21F is sufficient while suppressing an increase in the distance between the light guide plate 23 and the frame 21F. Can be secured.

  Further, according to the present embodiment, the light guide plate 23 is fixed to the frame 21F without the reflection sheet 24B. Therefore, the number of adhesive disposition areas can be reduced.

  Further, according to the present embodiment, the thickness of the adhesive 50 is the same as or equivalent to the depth of the penetrating portion H2u. Thereby, in the display device 100B (the light source device 20B), it is possible to suppress an increase in the thickness of the adhesive disposition region in a plan view (XY plane). That is, in the display device 100B (the light source device 20B), an increase in the thickness of the peripheral portion (frame) of the display region Rd1 can be suppressed.

  Hereinafter, the light emitted from the light source device 20B is also referred to as "light source device light".

  The adhesive 50 in the modified configuration B1 of the present embodiment may be the adhesive 50 of the above-described modified configuration N1. The adhesive 50 of the modified configuration N1 includes one or more diffusion members as described above. The diffusion member is a member having one or both of the diffusion characteristic and the reflection characteristic as described above. Thereby, also in the modified configuration B1 of the present embodiment, the effects of the modified configuration N1 can be obtained.

  Further, in the present embodiment, the frame 21F may be used to control the uniformity of the luminance of the light source device light (hereinafter, also referred to as "deformed configuration N2b"). In the following, the area of the frame 21F to which the adhesive 50 is attached is also referred to as "adhesive placement area Rfu". The adhesive disposition area Rfu is, for example, an area to which the adhesive 50 adheres in the frame 21F of FIG.

  In the modified configuration N2b, a diffusion member is provided in the adhesive disposition area Rfu of the frame 21F. The diffusion member is, for example, a diffusion pattern provided in the adhesive disposition area Rfu by printing or the like. The diffusing member of the modified configuration N2b is the same as the diffusing member of the modified configuration N1. That is, the diffusion member of the modified configuration N2b is a member having one or both of the diffusion characteristic and the reflection characteristic.

  In the modified configuration N2b, for example, the diffusion characteristic, the reflection characteristic, and the like of the light source device light are adjusted by adjusting the size of the diffusion member, the shape of the diffusion member, and the like. Therefore, the uniformity of the luminance of the light source device light can be controlled by adjusting the diffusion characteristic, the reflection characteristic, and the like.

  As described above, the region of the light guide plate 23 to which the adhesive 50 is attached is also referred to as “adhesive placement region Rpt”. The adhesive placement area Rpt is, for example, an area to which the adhesive 50 adheres in the light guide plate 23 of FIG. Further, as described above, the thickness of the adhesive 50 is also referred to as “adhesive thickness”. Note that, as described above, a portion of the reflective sheet 24B in contact with the through portion H2u is also referred to as a “through peripheral portion”. Also, in the following, the thickness of the penetrating peripheral portion is also referred to as "penetrating peripheral thickness".

  In the present embodiment, the adhesive thickness is the same as or equivalent to the thickness of the penetrating peripheral portion of the reflective sheet 24B, but the adhesive thickness may be different from the thickness of the penetrating peripheral portion of the reflective sheet 24B.

  Next, a configuration for causing the adhesive 50 to adhere to both the light guide plate 23 and the frame 21F will be described according to the thickness of the adhesive.

  In the following, a configuration in which a part of the light guide plate 23 is deformed in order to cause the adhesive 50 to adhere to both the light guide plate 23 and the frame 21F in the above-mentioned situation Sta1 is also referred to as “modified configuration BN3a1”. .

  In the modified configuration BN 3 a 1, the convex portion 23 X corresponding to the thickness of the adhesive 50 is provided in the adhesive disposition region Rpt of the light guide plate 23. Specifically, in the modified configuration BN 3 a 1, the convex portion 23 X is formed on the light guide plate 23. The convex portion 23X in the modified configuration BN 3a1 is formed, for example, by projecting the light emitting surface 23a side of the light guide plate 23 in the Z direction. In addition, the shape of the convex part 23X in deformation | transformation structure BN3a1 is the same as that of the convex part 23X of FIG. 4, for example.

  The convex portion 23X in the modified configuration BN 3a1 is configured to cause the adhesive 50 to adhere to both the light guide plate 23 and the frame 21F in the above-described situation Sta1 in which the adhesive thickness is smaller than the penetration peripheral thickness. The thickness of the convex portion 23X in the modified configuration BN3a1 is set such that the above-mentioned convex portion added thickness Th1a is the same as or equivalent to the penetration peripheral thickness in the situation Sta1.

  Hereinafter, in the above-described situation Stb1, a configuration in which a portion of the light guide plate 23 is deformed in order to cause the adhesive 50 to adhere to both the light guide plate 23 and the frame 21F is also referred to as "deformed configuration BN3b1". .

  In the modified configuration BN 3 b 1, a recess 23 V corresponding to the thickness of the adhesive 50 is provided in the adhesive disposition region Rpt of the light guide plate 23. The recess 23 V in the modified configuration BN 3 b 1 is a recess provided on the light emitting surface 23 a side of the light guide plate 23. In addition, the shape of the recessed part 23V in deformation | transformation structure BN3 b1 is the same as that of the recessed part 23V of FIG. 5, for example.

  The recess 23V in the modified configuration BN 3b1 is configured to cause the adhesive 50 to adhere to both the light guide plate 23 and the frame 21F in the situation Stb1 in which the adhesive thickness is larger than the penetration peripheral thickness. The adhesive 50 in the modified configuration BN 3 b 1 is adhered to the bottom surface of the recess 23 V.

  In the following, the distance from the adhesive disposition area Rfu of the frame 21F to the bottom surface of the recess 23V of the light guide plate 23 is also referred to as a "distance du1." Specifically, the recess 23V in the modified configuration BN 3b1 is configured such that the distance du1 is equal to or the same as the thickness of the adhesive in the situation Stb1.

  In the following, a configuration in which a part of the frame 21F is deformed in order to cause the adhesive 50 to adhere to both the light guide plate 23 and the frame 21F in the above-mentioned situation Sta1 is also referred to as "deformed configuration BN3a2".

  In the modified configuration BN3a2, the convex portion BFx corresponding to the thickness of the adhesive 50 is provided in the adhesive disposition area Rfu of the frame 21F. Specifically, in the modified configuration BN3a2, the convex portion BFx is formed on the frame 21F. The convex portion BFx is formed, for example, by projecting a part of the frame 21F (adhesive placement region Rfu) in the -Z direction. In addition, the shape of convex part BFx is the same as that of convex part 21 BX of FIG. 6, for example.

  The convex portion BFX is configured to cause the adhesive 50 to adhere to both the light guide plate 23 and the frame 21F in a situation Sta1 in which the adhesive thickness is smaller than the penetration peripheral thickness. In the following, the thickness obtained by adding the thickness of the convex portion BFX to the adhesive thickness in the situation Sta1 is also referred to as “convex portion addition thickness Th2b”. Specifically, the thickness of the convex portion BFX is set such that the convex portion addition thickness Th2b is the same as or equivalent to the penetration peripheral thickness in the situation Sta1.

  In the following, a configuration in which a part of the frame 21F is deformed in order to cause the adhesive 50 to adhere to both the light guide plate 23 and the frame 21F in the above-mentioned situation Stb1 is also referred to as "deformed configuration BN3b2".

  In the modified configuration BN 3 b 2, the concave portion BFV corresponding to the thickness of the adhesive 50 is provided in the adhesive disposition area Rfu of the frame 21 F. The recess BFV is a recess provided in a part of the frame 21F (adhesive placement region Rfu). The shape of the recess BFV is, for example, the same as the shape of the recess 21BV of FIG.

  The recess BFV is configured to cause the adhesive 50 to adhere to both the light guide plate 23 and the frame 21F in the situation Stb1 in which the adhesive thickness is larger than the penetration peripheral thickness. The adhesive 50 in the deformed configuration BN 3 b 2 is adhered to the bottom of the recess BFV.

  In the following, the distance from the bottom surface of the concave portion BFV of the frame 21F to the adhesive disposition region Rpt of the light guide plate 23 is also referred to as a “distance du2”. Specifically, the recess 21BFV is configured such that the distance du2 is the same as or equivalent to the adhesive thickness in the situation Stb1.

  The adhesive 50 can be adhered to both the light guide plate 23 and the frame 21F according to the thickness of the adhesive by the modified configuration BN3a1, the modified configuration BN3b1, the modified configuration BN3a2, the modified configuration BN3b2 and the like as described above.

  The convex portion 23X of the deformed configuration BN3a1, the concave portion 23V of the deformed configuration BN3b1, the convex portion BFX of the deformed configuration BN3a2, and the concave portion BFV of the deformed configuration BN3b2 are marks for providing the adhesive 50 when assembling the light source device 20B. It may be used.

  In the present invention, within the scope of the invention, each embodiment can be freely combined, or each embodiment can be appropriately modified or omitted.

  Reference Signs List 10 display panel 20, 20A, 20B light source device, 21B, 21F frame, 23 light guide plate, 23a light emitting surface, 23b back surface, 23s side surface, 21BV, 23V, BFV recess, 21BX, 23X, BFX protrusion, 24, 24A, 24B reflective sheet, 24s side surface portion, 24u upper surface portion, 25 light source, 100, 100A, 100B display device, H2, H2s, H2u penetration portion.

Claims (10)

Light source,
A light guide plate on which light emitted from the light source is incident;
A reflective sheet,
Equipped with a frame,
The reflection sheet is a sheet that reflects light directed from the light guide plate to the reflection sheet,
The frame holds the light guide plate and the reflective sheet.
The reflective sheet is provided between the light guide plate and the frame,
The reflection sheet is provided with a penetration portion which is a portion penetrating a part of the reflection sheet,
An adhesive is provided in the inside of the penetration part,
The adhesive adheres to the light guide plate and the frame between the light guide plate and the frame so that the light guide plate is fixed to the frame. A light source device. The light guide plate has a light emitting surface from which the light incident on the light guide plate is emitted,
The frame is configured to cover a back surface which is a surface opposite to the light emitting surface of the light guide plate,
The light source device according to claim 1, wherein the reflection sheet is provided such that the penetration part of the reflection sheet is present between the back surface and the frame. The light source device according to claim 2, wherein the penetration portion is provided in a region overlapping with a peripheral portion of the light guide plate in the reflective sheet in a plan view. The frame is configured to cover a side surface of the light guide plate.
The light source device according to claim 1, wherein the reflection sheet is provided such that the penetration portion of the reflection sheet is present between a side surface of the light guide plate and the frame. The light guide plate has a light emitting surface from which the light incident on the light guide plate is emitted,
The frame is configured to cover a peripheral portion of the light emitting surface of the light guide plate,
The light source device according to claim 1, wherein the reflection sheet is provided such that the penetration portion of the reflection sheet is present between a peripheral portion of the light emitting surface and the frame. The light source device according to any one of claims 1 to 5, wherein the adhesive includes a diffusion member having one or both of a property to diffuse light and a property to reflect light. The diffusion member having one or both of a light-diffusing property and a light-reflecting property is provided in a region of the frame to which the pressure-sensitive adhesive adheres. Light source device. The light source device according to any one of claims 1 to 5, wherein a convex portion or a concave portion corresponding to a thickness of the pressure-sensitive adhesive is provided in a region of the light guide plate to which the pressure-sensitive adhesive adheres. The light source device according to any one of claims 1 to 5, wherein a convex portion or a concave portion corresponding to a thickness of the adhesive is provided in a region of the frame to which the adhesive is adhered. A light source device according to any one of claims 1 to 9, comprising:
The display apparatus which displays an image using the light which the said light source device radiate | emits.

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