阅读说明：本技术 面板底部构件及包括面板底部构件的显示装置
(Panel bottom member and display device including the same
) 是由 郑炅浩
高玄锡
李在镐
章珠宁 于 2019-06-13 设计创作，主要内容包括：公开了面板底部组件。面板底部组件包括光阻挡件、振动声学装置、缓冲件和接合件,其中光阻挡件具有形成在其顶表面上的第一凹入图案；振动声学装置设置在光阻挡件下方,并联接到光阻挡件；缓冲件设置在光阻挡件下方；接合件设置在光阻挡件与振动声学装置之间,且接合件具有形成在其顶表面上的第二凹入图案,其中第二凹入图案与第一凹入图案不同。(A panel bottom assembly is disclosed. The panel bottom assembly includes a light blocker, a vibroacoustic device, a buffer, and a joint, wherein the light blocker has a first concave pattern formed on a top surface thereof; a vibroacoustic device disposed below the light barrier and coupled to the light barrier; the buffer member is arranged below the light blocking member; the bonding member is disposed between the light blocking member and the vibroacoustic device, and the bonding member has a second concave pattern formed on a top surface thereof, wherein the second concave pattern is different from the first concave pattern.)
1. A panel bottom assembly comprising:
a light blocking member having a first concave pattern formed on a top surface thereof;
a vibroacoustic device disposed below and coupled to the optical barrier;
a buffer disposed below the optical barrier; and
a bonding member disposed between the optical barrier and the vibroacoustic device, the bonding member having a second concave pattern formed on a top surface thereof,
wherein the second recessed pattern is different from the first recessed pattern.
2. The panel bottom assembly of claim 1, wherein a second volume per unit area of a second air channel formed by the second concave pattern between the top and bottom surfaces of the joint is greater than a first volume per unit area of a first air channel formed by the first concave pattern between the top and bottom surfaces of the light barrier.
3. The panel bottom assembly of claim 2, wherein a surface area of an upper portion of the second air channel in contact with the light barrier is in a range of 10% to 30% of the top surface of the engaging member.
4. The panel bottom assembly of claim 1, wherein a second depth of the second concave pattern in a thickness direction of the joint is greater than a first depth of the first concave pattern of the light blocker.
5. The panel bottom assembly of claim 1, wherein a second width of the second recessed pattern in a direction parallel to one surface of the joint is greater than a first width of the first recessed pattern.
6. The panel bottom assembly of claim 5 wherein said second width of said second recessed pattern is in the range of 5% to 15% of the width of a raised pattern defined by said second recessed pattern.
7. The panel bottom assembly of claim 1 wherein said joint is a double-sided adhesive tape.
8. The panel bottom assembly of claim 1 wherein said joint comprises:
a substrate having a third recess pattern aligned with the second recess pattern,
a first adhesive layer disposed on the top surface of the substrate, an
A second adhesive layer disposed on a bottom surface of the substrate.
9. The panel bottom assembly of claim 8 wherein said third pattern of depressions is repeatedly arranged in isolated islands.
10. The panel bottom assembly of claim 8 wherein said third pattern of depressions extends in a first direction and is repeatedly arranged in a second direction intersecting said first direction.
11. The panel bottom assembly of claim 8 wherein said substrate has a mesh structure.
12. The panel bottom assembly of claim 8, wherein said substrate has a fabric structure, an
Wherein the substrate comprises:
a first line extending in a first direction and arranged in a second direction intersecting the first direction, an
Second lines extending in the second direction and arranged in the first direction to cross the first lines.
13. The panel bottom assembly of claim 1, wherein said vibroacoustic device comprises a first electrode, a second electrode, and a layer of vibrating material disposed between said first electrode and said second electrode, and
wherein the vibration material layer includes a piezoelectric body, a piezoelectric film, and/or an electroactive polymer.
14. The panel bottom assembly of claim 1 wherein said light block comprises:
a substrate, a first electrode and a second electrode,
a first light blocking layer disposed on a top surface of the substrate and at least partially overlapping the vibroacoustic device, an
A top bonding layer disposed on a top surface of the first light blocking layer.
15. The panel bottom assembly of claim 14, wherein the first light blocking layer comprises a light absorbing material.
16. The panel bottom assembly of claim 14 wherein said light block further comprises a second light blocking layer at least partially overlapping said vibroacoustic device,
wherein the second light blocking layer is disposed on a bottom surface of the substrate, an
Wherein the joint and the vibroacoustic device are each disposed below the second light blocking layer.
17. The panel bottom assembly of claim 1 further comprising:
an interlayer bonding member disposed between the light blocking member and the buffer member and spaced apart from the bonding member,
wherein the interlayer joint does not overlap with the vibroacoustic device.
18. The panel bottom assembly of claim 1 further comprising:
a heat sink disposed between the light blocking member and the buffer member.
19. The panel bottom assembly of claim 18, wherein said heat sink at least partially overlaps said vibroacoustic device.
20. The panel bottom assembly of claim 1 further comprising:
a digitizer disposed between the optical barrier and the buffer,
wherein the digitizer at least partially overlaps the vibroacoustic device.
21. The panel bottom assembly of claim 1,
the bonding member is disposed between the light blocking member and the buffer member, an
Wherein the second concave pattern does not overlap with the buffer.
22. A panel bottom assembly comprising:
a light blocking member having a top surface and a bottom surface, a first concave pattern formed on the top surface, and a second concave pattern formed on the bottom surface;
a vibroacoustic device disposed below and coupled to the optical barrier; and
a buffer disposed below the optical barrier,
wherein a second air channel formed by the second concave pattern between the light barrier and the vibroacoustic device is different from a first air channel formed by the first concave pattern.
23. The panel bottom assembly of claim 22 wherein said first pattern of recesses is formed on the entire top surface of said light barrier,
wherein the second concave pattern is formed in a first region on the bottom surface of the light blocking member, an
Wherein the first region at least partially overlaps the vibroacoustic device.
24. The panel bottom assembly of claim 22 wherein the second volume per unit area of said second air passage is greater than the first volume per unit area of said first air passage.
25. The panel bottom assembly of claim 22 further comprising:
a bonding member disposed between the optical barrier and the vibroacoustic device and having a top surface on which a third concave pattern is formed,
wherein the vibroacoustic device is coupled to the optical barrier by the joint, an
Wherein the second air channel is formed by the second and third concave patterns.
26. The panel bottom assembly of claim 25, wherein the surface area of the lower portion of the second air channel in contact with the vibro-acoustic device is in the range of 10% to 30% of the top surface of the joint.
27. The panel bottom assembly of claim 25 wherein a second depth of the second recessed pattern in a thickness direction of the joint is greater than a first depth of the first recessed pattern.
28. The panel bottom assembly of claim 25 wherein a second width of said second pattern of indentations in a direction parallel to a surface of said joint is greater than a first width of said first pattern of indentations.
29. The panel bottom assembly of claim 25 wherein said first, second and third indentation patterns all have the same width and the same depth.
30. The panel bottom assembly of claim 25 wherein the second pattern of indentations extends in a first direction on the bottom surface of the light barrier and is aligned in a second direction that intersects the first direction, and
wherein the third concave patterns extend in the second direction on the top surface of the joint and are aligned in the first direction.
31. A display device, comprising:
a display panel; and
a panel bottom assembly disposed below the display panel,
wherein the panel bottom assembly comprises:
a light blocking member having a top surface, a first concave pattern formed on the top surface of the light blocking member,
a vibroacoustic device disposed below the optical barrier and coupled to the optical barrier,
a buffer disposed below the light blocking member, an
A joint disposed between the optical barrier and the vibroacoustic device and having a top surface on which a second concave pattern is formed, an
Wherein the second indentation pattern is different from the first indentation pattern.
Technical Field
The present disclosure relates to a display device, and more particularly, to a panel bottom member and a display device including the panel bottom member.
Background
Electronic devices such as smart phones, digital cameras, notebook computers, navigation devices, and smart Televisions (TVs) may include a display device for displaying images to a user. A display device generally includes a display panel for generating and displaying an image and a panel bottom member disposed below the display panel. The panel base member may include various functional sheets for protecting the display panel from heat and external impact.
However, current display devices are generally equipped only with a function of displaying an image. Therefore, in order to provide sound, a separate speaker needs to be provided for the electronic device.
Disclosure of Invention
The panel bottom assembly includes a light blocker, a vibroacoustic device, a buffer, and a joint, wherein the light blocker has a first concave pattern formed on a top surface thereof; a vibroacoustic device disposed below the light barrier and coupled to the light barrier; the buffer member is arranged below the light blocking member; the bonding member is disposed between the light blocking member and the vibroacoustic device, and the bonding member has a second concave pattern formed on a top surface thereof, wherein the second concave pattern is different from the first concave pattern.
The panel bottom assembly includes a light blocker, a vibroacoustic device, a buffer, wherein the light blocker has a top surface with a first recessed pattern formed thereon and a bottom surface with a second recessed pattern formed thereon; a vibroacoustic device disposed below the light barrier and coupled to the light barrier; the buffer is disposed below the light block, and a second air passage is formed by a second concave pattern between the light block and the vibroacoustic device, the second air passage being different from the first air passage formed by the first concave pattern.
The display device includes a display panel and a panel bottom assembly disposed below the display panel. The panel bottom assembly includes a light blocker, a vibroacoustic device, a buffer, and a joint, wherein the light blocker has a top surface on which a first recessed pattern is formed; a vibroacoustic device disposed below the light barrier and coupled to the light barrier; the buffer member is arranged below the light blocking member; the joining member is disposed between the optical barrier and the vibroacoustic device, and the joining member has a top surface on which a second concave pattern is formed, wherein the second concave pattern is different from the first concave pattern.
Drawings
A more complete understanding of the present disclosure and many of the attendant aspects thereof will be readily obtained as the same become better understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein:
fig. 1 is a perspective view illustrating a display device according to an exemplary embodiment of the present disclosure;
fig. 2 is an exploded perspective view illustrating the display device of fig. 1;
FIG. 3 is a cross-sectional view taken along line A-A' of FIG. 1;
fig. 4 is a schematic view showing a vibroacoustic device included in the display device of fig. 1;
fig. 5 is an enlarged sectional view showing a portion Q1 of fig. 3;
fig. 6 is a plan view showing a bonding member and a bottom bonding layer included in the display device of fig. 1;
FIG. 7 is a cross-sectional view illustrating an exemplary panel bottom member;
FIGS. 8A-8C are perspective views of various exemplary engagement members that may be included in the panel bottom member of FIG. 7;
fig. 9-11 are cross-sectional views illustrating an exemplary panel bottom member;
FIG. 12 is a perspective view illustrating an exemplary engagement member included in the panel bottom member of FIG. 11;
FIG. 13 is a cross-sectional view illustrating an exemplary panel bottom member;
FIGS. 14 and 15 are cross-sectional views illustrating an exemplary panel bottom member;
fig. 16 is a sectional view of a display device according to an exemplary embodiment of the present disclosure;
fig. 17 is an enlarged sectional view showing a portion Q1 of fig. 16; and
fig. 18 is a cross-sectional view illustrating an exemplary panel bottom member.
Detailed Description
In describing the exemplary embodiments of the present disclosure illustrated in the drawings, specific terminology is employed for the sake of clarity. However, the disclosure is not intended to be limited to the specific terminology so selected, and it is to be understood that each specific element includes all technical equivalents that operate in a similar manner.
However, the present invention is not limited to the embodiments disclosed hereinafter, but may be implemented in various forms. The matters defined in the description, such as a detailed construction and elements, are provided to assist those of ordinary skill in the art in a comprehensive understanding of the invention.
If an element is described as being "on" or "positioned" on "another element, such as another element or a layer or a different layer, then this includes both the case where the element is positioned directly on the other element or layer and the case where the element is positioned on the other element via the other layer or further element.
In the description of the present invention, the same reference numerals may be used to designate the same or corresponding elements in the respective drawings.
Fig. 1 is a perspective view illustrating a display device according to an exemplary embodiment of the present disclosure. Fig. 2 is an exploded perspective view illustrating the display device of fig. 1. Fig. 3 is a sectional view taken along line a-a' of fig. 1. Fig. 4 is a schematic view illustrating a vibroacoustic device included in the display device of fig. 1. Fig. 5 is an enlarged sectional view showing a portion Q1 of fig. 3. Fig. 6 is a plan view showing a bonding member and a bottom bonding layer included in the display device of fig. 1.
Referring to fig. 1 to 6, the display device 10 may display an image. The display apparatus 10 may be a mobile terminal such as a tablet, a smart phone, a Personal Digital Assistant (PDA), a Portable Multimedia Player (PMP), a game console, or a wearable device such as a watch-type electronic apparatus, but the disclosure is not limited thereto. For example, the display device 10 may be a large-sized electronic device such as a Television (TV) or an outdoor billboard, or the display device 10 may be a medium-sized or small-sized electronic device such as a Personal Computer (PC) monitor, a notebook computer, a car navigation device, or a digital camera.
The display device 10 may have a substantially rectangular shape in plan view. The display device 10 may include two long sides (e.g., a first long side 10s11 and a second long side 10s12) and two short sides (e.g., a first short side 10s21 and a second short side 10s 22). As shown in fig. 1, corners where two long sides and two short sides of the display device 10 meet may be at right angles or may be rounded. However, the planar shape of the display device 10 is not particularly limited, and the display device 10 may be formed in various other shapes such as a circular shape.
The display device 10 may include a display panel 100 and a panel bottom member 20, and the panel bottom member 20 may include a vibroacoustic device 400 and a buffer member 520. The display device 10 may further include a functional module (or panel) 200, a window 300, and a stand 600.
The display panel 100 may be configured to display an image. For example, the display panel 100 may be an Organic Light Emitting Diode (OLED) display panel. In the following description, it is assumed that the display panel 100 is an OLED display panel, but the present disclosure is not limited thereto. For example, the display panel 100 may alternatively be a Liquid Crystal Display (LCD) panel, an electrophoretic display (EPD) panel, or a Plasma Display Panel (PDP).
The display panel 100 may include a plurality of OLEDs disposed on a substrate. The substrate may be a rigid substrate formed of glass or a flexible substrate formed of Polyimide (PI). In the case where the substrate is a PI substrate, the display panel 100 may be bendable, foldable, or rollable. The display panel 100 may have a display area DA and a non-display area NDA, wherein the non-display area NDA is disposed on a periphery of the display area DA and at least partially surrounds the display area DA.
Unless otherwise specified, the terms "upper", "top", and "top surface" as used herein denote the display surface side of the display panel 100, and the terms "lower", "bottom", and "bottom surface" as used herein denote the side opposite to the display surface side of the display panel 100.
The functional module 200 may be disposed above the display panel 100. The functional module 200 may comprise at least one functional layer. The functional layer may be a layer that performs a touch sensing function, a color filtering function, a color conversion function, a polarization function, and/or a biometric information recognition function (e.g., a fingerprint recognition function). The functional layer may be a sheet, film layer, coating, panel and/or panel. The functional layer may consist of a single layer or may comprise a stack of multiple films or coating layers. For example, the functional layer may be a touch sensing panel, a color filter, an optical film, and/or a fingerprint sensing panel. The functional module 200 is an optional element and may be omitted.
The window 300 may be disposed above the functional module 200 (or above the display panel 100). The window 300 may be disposed to at least partially overlap the display panel 100 and cover the entire display panel 100. The size of the window 300 may be larger than that of the display panel 100. For example, the window 300 may protrude outward beyond the display panel 100 on both short sides of the display device 10 and/or the window 300 may also protrude outward beyond the display panel 100 on both long sides of the display device 10. The window 300 may protrude more than the display panel 100 on both short sides of the display panel 100 than on both long sides of the display panel 100.
The window 300 may comprise glass, sapphire, or plastic, and may be rigid, although the disclosure is not limited thereto. For example, the window 300 may alternatively be flexible.
The window 300 may include a central portion 310 and a light shielding pattern (or decorative element) 320. The central portion 310 may at least partially overlap the display area DA of the display panel 100, and may transmit light emitted from the display area DA through the central portion 310. The light shielding pattern 320 may be disposed along an edge of the window 300. The light shielding pattern 320 may at least partially overlap the non-display area NDA of the display panel 100 and may prevent the non-display area NDA from being seen by a user.
The window 300 may be coupled to the functional module 200 (or to the display panel 100) by a transparent bonding layer 710. The transparent bonding layer 710 may be an Optically Clear Adhesive (OCA) or an Optically Clear Resin (OCR).
The panel bottom member 20 may be disposed under the display panel 100, and may be coupled to the display panel 100. The panel bottom member 20 may have substantially the same size and shape as the display panel 100, and may be disposed to at least partially overlap the display panel 100. The edge of the panel bottom member 20 may be aligned with the edge of the display panel 100, but the present disclosure is not limited thereto.
The panel bottom member 20 may include a light blocking member 510, a vibroacoustic device 400, and a cushioning member 520.
The light blocking (or light absorbing) member 510 may have substantially the same shape and size as the display panel 100, and may be disposed under the display panel 100.
The light blocking member 510 may block transmission of light therethrough, and may prevent elements (e.g., the vibroacoustic device 400, the buffering member 520, etc.) disposed below the light blocking member 510 from being seen from above.
The light blocking member 510 may have a top surface on which the first concave pattern CC1 and/or the first convex pattern CV1 (or first relief pattern) are formed.
The first concave pattern CC1 is recessed from the top surface of the light blocking member 510. Similar to the second concave pattern CC2 of the coupling member 720 of fig. 6, the first concave pattern CC1 may form a mesh shape or a net shape in a plan view. The second recess pattern CC2 (or the first recess pattern CC1) may individually have a rectangular shape in a plan view, but the present disclosure is not limited thereto. For example, the second concave pattern CC2 may individually have a polygonal (e.g., rectangular or hexagonal) or circular shape in plan view.
The first concave patterns CC1 may be formed on the top surface of the light blocking member 510 by coating an adhesive (or an adhesive layer for forming the top surface of the light blocking member 510) on a release film having convex patterns corresponding to the first concave patterns CC1, and laminating and drying a substrate of the light blocking member 510 on the release film. The release film may be removed when the light blocking member 510 is bonded to the display panel 100.
Due to the presence of the first concave pattern CC1, a first air channel may be formed between the display panel 100 and the light blocking member 510 (or between the top and bottom surfaces of the light blocking member 510). Then, air bubbles generated between the display panel 100 and the light blocking member 510 in the process of attaching the light blocking member 510 to the display panel 100 may be released through the first air passage. The first concave pattern CC1 may collapse with time, and thus, the top surface of the light blocking member 510 may become substantially flat.
The structure of the light blocking member 510 will be described in detail later with reference to fig. 11.
The vibro-acoustic device 400 (or vibrator or actuator) may generate vibrations in response to an acoustic signal. The vibro-acoustic device 400 may comprise a piezoelectric device having a layer of vibrating material.
As shown in fig. 4, the vibro-acoustic device 400 may include a first electrode 410, a second electrode 430, and a layer of vibrating material 420. The second electrode 430 may be disposed to face the first electrode 410, and the vibration material layer 420 may be interposed between the first electrode 410 and the second electrode 430.
The first electrode 410 and the second electrode 430 may each include a conductive material. For example, the first electrode 410 and the second electrode 430 may each include a transparent conductor, such as Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO), an opaque metal, a conductive polymer, or a Carbon Nanotube (CNT).
The vibrating material layer 420 may include a piezoelectric material that vibrates in response to an electric field. For example, the vibration material layer 420 may include a piezoelectric body such as lead zirconate titanate (PZT), a piezoelectric film such as a polyvinylidene fluoride (PVDF) film, and/or an electroactive polymer.
The vibration material layer 420 may be compressed or relaxed according to the polarity of the voltage applied to the vibration material layer 420. For example, as shown in fig. 4, when a positive voltage is applied to the first electrode 410 and a negative voltage is applied to the second electrode 430, a compressive force F1 is generated in the vibration material layer 420 so that the vibration material layer 420 can be compressed in the thickness direction thereof. When a negative voltage is applied to the first electrode 410 and a positive voltage is applied to the second electrode 430, a relaxation force F2 is generated in the vibration material layer 420, so that the vibration material layer 420 can expand in the thickness direction thereof. Accordingly, when an alternating voltage of alternating polarity is applied to the first electrode 410 and the second electrode 430, the vibration material layer 420 may repeatedly contract and expand. Due to this phenomenon, vibration may be caused in the display panel 100 adjacent to the vibroacoustic device 400. These vibrations may be controlled by applying a voltage in order to produce the desired sound. Thus, the display panel 100 may function as a diaphragm of a speaker. For example, the sound may be generated by a change in air pressure caused by vibration of the display panel 100. When the OLED display panel is used as the display panel 100, sound can be generated without vibration causing screen distortion.
In general, the larger the size of the diaphragm of the speaker, the higher the pressure of sound output from the diaphragm, and the better the output characteristics of the speaker in the low frequency range. When the display panel 100, which occupies a larger portion of the display device 10, is used as the diaphragm, a larger diaphragm area can be secured than when a separate diaphragm is provided in the display device 10, and therefore, the display device 10 can provide excellent sound and excellent output characteristics, particularly in a low frequency range. When the display panel 100 is used as a diaphragm, it is not necessary to provide a separate speaker inside the display device 10. Therefore, the size of the display device 10 can be reduced, and the structure of the display device 10 can be simplified.
In the following description, it is assumed that the vibroacoustic device 400 includes a piezoelectric device, but the present disclosure is not limited thereto. For example, the vibroacoustic device 400 may alternatively include a permanent magnet and a coil wound around the permanent magnet such that a current corresponding to an acoustic signal flows through the coil and thereby generates a desired acoustic vibration.
The engaging member 720 may be disposed between the light blocking member 510 and the vibroacoustic device 400. The vibroacoustic device 400 may be coupled to the light blocking member 510 (or to the display panel 100) by an engaging member 720.
The engagement member 720 may comprise a double-sided adhesive tape. The engaging member 720 may include the same material as that of the top surface of the light blocking member 510 or a different material.
As the flatness of the vibroacoustic device 400 decreases (or the roughness of the top surface of the vibroacoustic device 400 increases), or as the ductility of the light blocking member 510 or the display panel 100 to which the joining member 720 is coupled decreases, the joining member 720 may become thicker. For example, the thickness of the engagement member 720 may be in the range of 30 μm to 180 μm, 60 μm to 120 μm, or 90 μm to 180 μm, inclusive. In this example, the thickness of the light blocking member 510 may be 1/3 to 1/2 of the thickness of the engaging member 720. For example, if the coupling member 720 has a thickness in the range of 90 to 180 μm, the light blocking member 510 may have a thickness in the range of 30 to 60 μm, but the present disclosure is not limited thereto.
The second concave pattern CC2 and/or the second convex pattern CV2 (or a second relief pattern) may be formed on the top surface of the engagement member 720. Similar to the first recess pattern CC1, the second recess pattern CC2 may be recessed from the top surface of the engagement member 720. As shown in fig. 6, the second concave pattern CC2 may form a mesh shape or a net shape in a plan view.
Due to the presence of the second concave pattern CC2, a second air passage may be formed between the light blocking member 510 and the vibroacoustic device 400 (or between the top surface and the bottom surface of the coupling member 720). Then, in the process of attaching the vibroacoustic device 400 to the light blocking member 510 (or to the display panel 100 to which the light blocking member 510 is attached on the display panel 100), air bubbles generated between the light blocking member 510 and the vibroacoustic device 400 may be released through the second air passage.
The second concave pattern CC2 of the coupling member 720 may be different from the first concave pattern CC1 of the light blocking member 510.
The cross-sectional area (or volume per unit area) of the second air passage formed by the second concave patterns CC2 of the coupling member 720 may be greater than the cross-sectional area (or volume per unit area) of the first air passage formed by the first concave patterns CC1 of the light blocking member 510.
According to an exemplary embodiment of the present disclosure, a surface area of the second air passage formed by the second concave patterns CC2 of the coupling member 720 (or a surface area of an upper portion of the second air passage in contact with the light blocking member 510) may be greater than a surface area of the first air passage formed by the first concave patterns CC1 of the light blocking member 510 (or a surface area of an upper portion of the first air passage in contact with the display panel 100).
For example, the surface area of the second air passage (or the surface area of the upper portion of the second air passage that is in contact with the light blocking member 510) formed by the second concave pattern CC2 of the coupling member 720 may be in the range of 10% to 30%, 10% to 20%, or 20% to 30% of the total area of the top surface of the coupling member 720. In this example, the surface area of the first air channel (or the surface area of the upper portion of the first air channel contacting the display panel 100) formed by the first concave pattern CC1 of the light blocking member 510 may be 10% or less, or 20% or less, of the total area of the top surface of the light blocking member 510.
According to an exemplary embodiment of the present disclosure, the second depth T2 of the second concave pattern CC2 (or the second convex pattern CV2) may be greater than the first depth T1 of the first concave pattern CC1 (or the first convex pattern CV1) in the thickness direction of the engaging member 720.
For example, the second depth T2 of the second concave pattern CC2 may be in the range of 1.3 to 3 times, 1.5 to 2 times, or 1.3 to 1.5 times the first depth T1 of the first concave pattern CC 1. For example, the second depth T2 of the second concave pattern CC2 may be in a range of 4 to 15 μm, 4 to 8 μm, or 8 to 15 μm in consideration of the thickness of the coupling member 720. The first depth T1 of the first recess pattern CC1 may be less than the second depth T2 of the second recess pattern CC 2. For example, if the second depth T2 of the second concave pattern CC2 is 12 μm, the first depth T1 of the first concave pattern CC1 may be in the range of 4 μm to 6 μm.
The second width D2 of the second recess pattern CC2 (e.g., the width of the second recess pattern CC2 in a direction parallel to the engaging member 720) may be the same as the first width D1 of the first recess pattern CC1 or smaller than the first width D1 of the first recess pattern CC 1. Accordingly, the cross-sectional area (or volume) of the second air passage formed by the second concave patterns CC2 may be greater than the cross-sectional area (or volume) of the first air passage formed by the first concave patterns CC 1.
According to an exemplary embodiment of the present disclosure, the second width D2 of the second concave pattern CC2 of the engaging member 720 may be greater than the first width D1 of the first concave pattern CC1 of the light blocking member 510.
For example, the second width D2 of the second concave pattern CC2 of the engaging member 720 may be in the range of 5% to 15% of the width W2 of the second convex pattern CV2 of the engaging member 720, or may be in the range of 5% to 15% of the distance between the second concave patterns CC2, wherein the second convex pattern CV2 is defined by the second concave pattern CC2 and protrudes upward beyond the second concave pattern CC 2. For example, the width W2 of the second protrusion patterns CV2 (or the distance between the second recess patterns CC 2) may be in the range of 150 to 800 μm, 150 to 250 μm, or 400 to 800 μm, and the second width D2 of the second recess patterns CC2 may be in the range of 4 to 15 μm, 4 to 8 μm, or 8 to 15 μm.
For example, the first width D1 of the first concave pattern CC1 of the light blocking member 510 may be 5% or less of the width W1 of the first convex pattern CV1 of the light blocking member 510, or may be 5% or less of the distance between the first concave patterns CC1, wherein the first convex pattern CV1 is defined by the first concave patterns CC1 and protrudes upward beyond the first concave patterns CC 1. For example, the width W1 of the first protrusion patterns CV1 (or the distance between the first recess patterns CC1) may be in the range of 150 μm to 200 μm, and the first width D1 of the first recess patterns CC1 may be in the range of 3 μm to 6 μm.
Accordingly, the cross-sectional area of the second air passage formed by the second concave pattern CC2 may be greater than the cross-sectional area of the first air passage formed by the first concave pattern CC 1.
The bottom surface of the display panel 100 may be relatively flat, and the light blocking member 510 may be relatively flexible. Therefore, even if the display panel 100 to which the window 300 is coupled is rigid, only a relatively small amount of bubbles can be generated in the display panel 100 when the light blocking member 510 is coupled or attached to the display panel 100. Then, even if the first air passage is relatively narrow, the generated bubbles can be appropriately released through the first air passage.
The top surface of the vibroacoustic device 400 may be relatively rough (e.g., the flatness of the top surface of the vibroacoustic device 400 may be less than the flatness of the bottom surface of the display panel 100), and the vibroacoustic device 400 may be rigid. When a separate light blocking member 510 or a light blocking member 510 attached to the display panel 100 is coupled to the vibroacoustic device 400 (e.g., when two objects that are relatively rigid and have an uneven surface are coupled), a relatively large amount of air bubbles may be generated. However, since the first air passage may be formed relatively wide due to the presence of the second concave patterns CC2 of the coupling member 720, air bubbles generated between the light blocking member 510 and the vibroacoustic device 400 may be effectively released through the first air passage. Therefore, even if a separate vacuum apparatus is not used, the vibroacoustic device 400 can be coupled to the light blocking member 510 by the coupling member 720 on which the second concave pattern CC2 is formed without generating air bubbles.
Since the shape of the second concave pattern CC2 of the engaging member 720 may be maintained for a period of time, air bubbles remaining unreleased between the light blocking member 510 and the vibroacoustic device 400 (e.g., air bubbles generated when coupling the vibroacoustic device 400 and the light blocking member 510 and which cannot be released) may be appropriately released during use of the display device 10. Therefore, any defect that may be caused by the bubbles (for example, a phenomenon in which the bubbles become visible on the screen or a zebra pattern is generated on the screen due to the bubbles) can be prevented.
The buffer member 520 prevents damage to the display panel 100, the window 300, and the like by absorbing external impact. The cushioning member 520 may be composed of a single layer or a stack of multiple films or coating layers. For example, the cushioning member 520 may be formed of a polymer resin such as Polyurethane (PU), Polycarbonate (PC), polypropylene (PP), or Polyethylene (PE), or may include an elastic material such as a foam rubber sponge, a polyurethane-based material, or an acrylic material. The cushion member 520 may be a cushion layer.
The cushioning member 520 may not overlap the vibroacoustic device 400. Since the buffering member 520 may be formed of an elastic material and may not overlap the vibroacoustic device 400, vibrations generated by the vibroacoustic device 400 may be transmitted to the display panel 100 without being absorbed by the buffering member 520.
The stand 600 may be disposed under the display panel 100 and the panel base member 20 (or under the vibroacoustic device 400 and the buffer member 520).
The stand 600 may be a container for receiving and protecting various parts and elements of the display device 10 therein. For example, the stand 600 may receive the functional module 200, the display panel 100, and the panel base member 20 therein.
The bracket 600 may be formed of a synthetic resin material, a metal material, or a combination of different materials.
The stand 600 may be partially exposed on the side of the display panel 100 to form the outside of the display device 10. The housing may be coupled to the bottom of the bracket 600, but the present disclosure is not limited thereto. For example, the stand 600 may alternatively be provided as a housing of the display device 10.
The bracket 600 may include a bottom portion 610 and a sidewall 620. The top surface of the bottom portion 610 may face the bottom surfaces of the vibroacoustic device 400 and the cushioning member 520. The side wall 620 of the stand 600 may face the side of the functional module 200, the side of the display panel 100, and the side of the buffer member 520. The top of the sidewall 620 may face the window 300. The outside of the bracket 600 may be aligned with the outside of the window 300. The window 300 may be attached to the bracket 600 by a waterproof tape.
The sidewall 620 of the bracket 600 may be disposed outside the outside of the window 300, and the side of the bracket 600 may face the outside of the window 300.
The bottom portion 610 may include a recess 650 corresponding to the vibroacoustic device 400. In the case where the vibroacoustic device 400 protrudes downward beyond the cushioning member 520, the vibroacoustic device 400 may be received in the recess 650 of the bottom portion 610. The bottom surface and the side surfaces of the vibroacoustic device 400 may be spaced apart from the top surface of the bottom portion 610 (including the groove 650) so that a space for vibration of the vibroacoustic device 400 may be secured. However, the present disclosure is not limited to this particular configuration. For example, alternatively, the bottom surface and/or sides of the vibroacoustic device 400 may be partially in contact with the groove 650, or may alternatively be coupled to the groove 650 by a double-sided tape.
The bottom surface of the bottom portion 610 may be flat. Accordingly, a portion of the bottom portion 610 where the vibroacoustic device 400 is disposed (e.g., a thickness of a portion of the bottom portion 610 where the groove 650 is formed) may be thinner than the rest of the bottom portion 610. The thickness of the bottom portion 610 may be uniform in a region other than the region where the vibroacoustic device 400 is disposed.
The bottom portion 610 of the bracket 600 may further include a hole penetrating the bottom portion 610 in a thickness direction of the bottom portion 610. For example, the bottom portion 610 of the stand 600 may also include a battery aperture 670, wherein a battery is inserted into the battery aperture 670. A battery hole 670 may be formed in a middle portion of the bottom portion 610 of the stand 600. Battery aperture 670 may at least partially overlap cushioning member 520. For example, the buffering member 520 may be removed from an area corresponding to the groove 650, and may be formed in an area corresponding to the battery hole 670 to cover the battery hole 670.
Cushioning member 520 may also include a top bonding layer and a bottom bonding layer 530. The buffer member 520 may be fixed to the display panel 100 by a top bonding layer, and the buffer member 520 may be fixed to the support 600 by a bottom bonding layer 530.
Each of the top and bottom tie layers 530 may include an adhesive layer or a resin layer. For example, each of the top and bottom tie layers 530 may include a silicone-based polymer, a urethane-based polymer, a silicone-urethane hybrid polymer, an acrylic polymer, an isocyanate polymer, a polyvinyl alcohol polymer, a gelatin polymer, a vinyl polymer, a latex polymer, a polyester polymer, and/or a water-based polyester polymer.
The bottom bonding layer 530 may be disposed below the cushioning member 520. For example, the bottom bonding layer 530 may have a thickness in a range of 60 μm to 120 μm, but the present disclosure is not limited thereto. The bottom bonding layer 530 may be disposed to expose at least a portion of a bottom surface of the cushioning member 520.
As shown in fig. 3 and 6, the bottom bonding layer 530 may have island-like patterns isolated from each other. The bottom bonding layer 530 may not overlap the grooves 650 and the battery holes 670 of the bottom portion 610 of the stand 600, and may be disposed at a uniform density in a region other than a region where the grooves 650 and the battery holes 670 are formed. The island pattern of the bottom bonding layer 530 may have a circular shape, but the present disclosure is not limited thereto. For example, the island-like pattern of the bottom bonding layer 530 may alternatively have a rectangular shape or another polygonal shape.
The buffering member 520 and the bracket 600 may be spaced apart from each other in a region where the bottom bonding layer 530 is not disposed. The region where the bottom bonding layer 530 is not disposed (e.g., the region where the cushioning member 520 and the bracket 600 are spaced apart from each other) is disposed in the entire cushioning member 520. Empty spaces where the bottom bonding layer 530 is not disposed may be connected to each other and may also be connected to the vibroacoustic device 400. These empty spaces may become resonance spaces of the enclosure that can serve as speakers, and may amplify the sound generated by the vibroacoustic device 400. Since the entire region where the bottom bonding layer 530 is not provided can be used as a resonance space, a sufficiently large resonance space can be configured compared to the size of the entire display device 10. When an empty space where the bottom bonding layer 530 is not provided is connected to the battery hole 670, the empty space inside the battery hole 670 (or a space between the buffer member 520 and the battery mounted in the battery hole 670) may also serve as a resonance space, and sound may be further amplified.
As described above, since the panel base member 20 includes the vibration acoustic device 400, the display device 10 can be equipped with a sound emission function.
The vibroacoustic device 400 may be coupled to the light blocking member 510 (or the display panel 100) by the coupling member 720 on which the second concave pattern CC2 is formed, without generating bubbles and without the aid of an additional vacuum apparatus.
Since the shape of the second concave pattern CC2 (or the shape of the second relief pattern) of the engaging member 720 may be maintained for a period of time, remaining unreleased air bubbles between the engaging member 720 and the light blocking member 510 may be released through the second air passage formed by the second concave pattern CC2, and thus, defects that may be caused by the air bubbles may be prevented.
Since the bottom bonding layer 530 has an island-like pattern and couples the stand 600 to the cushioning member 520 while leaving an empty space between the stand 600 and the cushioning member 520, a large resonance space can be formed by spatially connecting the empty space between the stand 600 and the cushioning member 520, and thus, the sound emission function of the display device 10 can be made more effective.
FIG. 7 is a cross-sectional view of an exemplary panel bottom member. Fig. 8A-8C are perspective views of various exemplary engagement members that may be included in the panel bottom member of fig. 7.
Referring to fig. 7 and 8A, the panel bottom member 20_1 is different from the panel bottom member 20 of fig. 5 in that the panel bottom member 20_1 of fig. 7 and 8A includes an engagement member 720_ 1.
The bonding member 720_1 may include a substrate 721, a first bonding layer 723, and a second bonding layer 724. The coupling member 720_1 may further include a protrusion pattern 722.
As shown in fig. 8A, the substrate 721 may have a plate shape. The substrate 721 may be formed of a flexible polymer material, such as polyethylene terephthalate (PET), PI, PC, PE, PP, Polysulfone (PSF), polymethyl methacrylate (PMMA), triacetyl cellulose (TAC), and/or Cyclo Olefin Polymer (COP).
The protrusion patterns 722 may be disposed on the substrate 721 and may be arranged in a matrix form at intervals of a predetermined distance (e.g., having a first width D1). The protruding patterns 722 may have a rectangular shape in a plan view to correspond to the second concave patterns CC2 (or the second convex patterns CV2), but the present disclosure is not limited thereto. For example, the protrusion pattern 722 may alternatively have a circular shape, a triangular shape, or another polygonal shape in plan view. The width of the protrusion pattern 722 may be the same as the width W2 of the second protrusion pattern CV2 or less than the width W2 of the second protrusion pattern CV 2. The distance between the protrusion patterns 722 may be the same as the second width D2 of the second concave pattern CC2 or greater than the second width D2 of the second concave pattern CC 2. The height H1 of the protrusion pattern 722 may be the same as the second depth T2 of the second concave pattern CC2 or greater than the second depth T2 of the second concave pattern CC 2.
The protrusion pattern 722 may include the same material as the substrate 721. For example, the protrusion pattern 722 may be formed as one body with the substrate 721.
The first bonding layer 723 may be disposed over the substrate 721 and the protrusion pattern 722 (or on top surfaces of the substrate 721 and the protrusion pattern 722), and may include an adhesive layer or a resin layer. For example, the first tie layer 723 may include a silicone-based polymer, a urethane-based polymer, a silicone-urethane hybrid polymer, an acrylic polymer, an isocyanate polymer, a polyvinyl alcohol polymer, a gelatin polymer, a vinyl polymer, a latex polymer, a polyester polymer, and/or a water-based polyester polymer.
The first bonding layer 723 may be uniformly applied or coated on the substrate 721 and may have a relief pattern (or the first protrusion pattern CV1 and the first recess pattern CC1) due to the presence of the protrusion pattern 722. The shape of the relief pattern of the first bonding layer 723 (or the bonding member 720_1) may be maintained for a period of time due to the presence of the protrusion pattern 722.
The second bonding layer 724 may be provided below the substrate 721 (or on the bottom surface of the substrate 721), and may include one of the above-described examples of the material of the first bonding layer 723.
Fig. 8A illustrates the protrusion pattern 722 as an island pattern, but the present disclosure is not limited thereto.
Referring to fig. 8B, the coupling member 720_1 is different from the coupling member 720_1 of fig. 8A in that the coupling member 720_1 of fig. 8B includes a protrusion pattern 722_ 1.
The protrusion patterns 722_1 may be linear patterns having a predetermined width (e.g., the width W2 of the second protrusion pattern CV2), and the protrusion patterns 722_1 may extend in the first direction DR1 and may be arranged at intervals of a predetermined distance (e.g., the second width D2) in the second direction DR2 intersecting the first direction DR 1. In this case, the second air passage formed by the second concave patterns CC2 may be connected to the outside only in the first direction DR 1.
Referring to fig. 8C, the joining member 720_2 is different from the joining member 720_1 of fig. 8A in that the joining member 720_2 includes a substrate 721_2 and a protrusion pattern 722_ 2.
The substrate 721_2 may include a linear pattern having a predetermined width (e.g., the width W2 of the second protrusion pattern CV2) and extending in the second direction DR2, and may be arranged at intervals of a predetermined distance (e.g., the second width D2) in the first direction DR 1. The protrusion patterns 722_2 may be disposed on the substrate 721_2, may have a predetermined width (e.g., a width W2 of the second protrusion pattern CV2), may extend in the first direction DR1, and may be arranged at intervals of a predetermined distance (e.g., a second width D2) in the second direction DR 2. For example, the substrate 721_2 and the protrusion pattern 722_2 may form a mesh structure or a fabric structure in a plan view.
As described above with reference to fig. 7 to 8C, the coupling member 720, 720_1, or 720_2 includes the protruding pattern 722, 722_1, or 722_2 corresponding to the second recessed pattern CC 2. Accordingly, the shape of the second concave pattern CC2 may be maintained for a period of time.
Fig. 9-11 are cross-sectional views of various exemplary panel bottom members. Fig. 12 is a perspective view illustrating an exemplary engaging member included in the panel bottom member of fig. 11.
Referring to fig. 1, 3, 5 and 9, the panel bottom member 20_2 is different from the panel bottom member 20 of fig. 5 in that the panel bottom member 20_2 of fig. 9 includes a light blocking member 510_ 1.
The light blocking member 510_1 may include a substrate 511, a first light absorbing (or light blocking) layer 512, and an upper bonding layer 513. The light blocking member 510_1 may further include a second light absorbing layer 514.
The substrate 511 may be formed of PET, PI, PC, PE, PP, PSF, PMMA, TAC, and/or COP.
The first light absorbing layer 512 may be disposed on the top surface of the substrate 511. The first light absorbing layer 512 may be disposed directly on the top surface of the substrate 511. The first light absorbing layer 512 may be disposed on the entire top surface of the substrate 511.
The first light absorbing layer 512 may block light from passing therethrough and thus may prevent the vibroacoustic device 400 thereunder from being visible from above. The first light absorbing layer 512 may include a light absorbing material, such as a black pigment or dye. For example, the first light absorbing layer 512 may include black ink. The first light absorbing layer 512 may be formed on the top surface of the substrate 511 by coating or printing.
The upper bonding layer 513 may be disposed on the top surface of the first light absorbing layer 512 (or the substrate 511). The upper bonding layer 513 may attach the light blocking member 510_1 to the bottom surface of the display panel 100. The upper tie layer 513 may include an adhesive layer or a resin layer. For example, the upper tie layer 513 may include a silicone-based polymer, a urethane-based polymer, a silicone-urethane hybrid polymer, an acrylic polymer, an isocyanate polymer, a polyvinyl alcohol polymer, a gelatin polymer, a vinyl polymer, a latex polymer, a polyester polymer, or a water-based polyester polymer.
The first recess pattern CC1 may be formed on the top surface of the upper bonding layer 513. As described above, the first recess pattern CC1 may be formed by coating an adhesive (or an adhesive for forming the upper bonding layer 513) on the release film having the protrusion pattern corresponding to the first recess pattern CC1 and drying the adhesive. The release film may be removed when the light blocking member 510_1 is bonded to the display panel 100, and the light blocking member 510_1 may be coupled to the display panel 100 through the upper bonding layer 513.
The second light absorbing layer 514 may be disposed on the bottom surface of the substrate 511 and may be substantially the same as the first light absorbing layer 512. Accordingly, any details regarding the omitted description of the second light absorbing layer 514 may be understood to be at least similar to the corresponding details described above.
Referring to fig. 5 and 10, the panel bottom member 20_3 of fig. 10 is different from the panel bottom member 20 of fig. 5 in that the panel bottom member 20_3 of fig. 10 includes a first coupling member 720_3 and a second coupling member 730.
The first coupling member 720_3 of fig. 10 is different from the coupling member 720 of fig. 5 in that the first coupling member 720_3 includes a second concave pattern CC2_1 (or a relief pattern).
The second width D2 of the second concave pattern CC2_1, the distance between the second concave patterns CC2_1 (or the width W2 of the second convex pattern CV2_ 1), and the second depth T2 of the second concave pattern CC2_1 formed on the top surface of the first coupling member 720_3 may be the same as the first width D1 of the first concave pattern CC1, the distance between the first concave patterns CC1 (or the width W1 of the first convex pattern CV1), and the first depth T1 of the first concave pattern CC1, respectively, formed on the top surface of the light blocking member 510.
The second coupling member 730 may be disposed between the light blocking member 510 and the first coupling member 720_ 3. A third concave pattern CC3 (and a third convex pattern CV3) may be formed on the bottom surface of the second coupling member 730.
The third width D3 of the third concave pattern CC3, the distance between the third concave patterns CC3 (or the width W3 of the third convex pattern CV3), and the third depth T3 of the third concave pattern CC3 of the second engaging member 730 may be the same as the second width D2 of the second concave pattern CC2_1, the distance between the second concave patterns CC2_1 (or the width W2 of the second convex pattern CV2_ 1), and the second depth T2 of the second concave pattern CC2_1, respectively, formed on the top surface of the first engaging member 720_ 3.
For example, the second coupling member 730 and the first coupling member 720_3 may be integrally formed as a single coupling member (e.g., a double-sided adhesive tape) and may be cut (or otherwise separated) to be attached to the top surface of the vibroacoustic device 400 and the bottom surface of the light blocking member 510, respectively, to couple the vibroacoustic device 400 and the light blocking member 510. For example, the second coupling member 730 may be formed as one body with the light blocking member 510.
The second concave pattern CC2_1 of the first coupling member 720_3 and the third concave pattern CC3 of the second coupling member 730 may form a second air passage, and the size (or cross-sectional area) of the second air passage may be greater than the size (or cross-sectional area) of the first air passage formed by the first concave pattern CC1 of the light blocking member 510. Therefore, even if a large number of bubbles are generated or remaining large number of bubbles are not released in the process of coupling the light blocking member 510 alone or the light blocking member 510 coupled with the display panel 100 to the vibroacoustic device 400, the bubbles can be easily released through the second air passage.
As shown in fig. 10, even if an engaging member having a relatively small concave pattern (or a relief pattern) formed thereon is used, by attaching the engaging member to the bottom surface of the light blocking member 510 and the top surface of the vibroacoustic device 400, it is possible to prevent generation of air bubbles or defects that may be caused by such air bubbles during coupling of the light blocking member 510 and the vibroacoustic device 400.
Referring to fig. 11 and 12, the panel bottom member 20_4 of fig. 11 is different from the panel bottom member 20_3 of fig. 10 in that the panel bottom member 20_4 of fig. 11 includes a first coupling member 720_4 and a second coupling member 730_ 1.
The first coupling member 720_4 may be disposed on the top surface of the vibroacoustic device 400, and may have a top surface on which the second concave pattern CC2_1 is formed. Similarly, the second coupling member 730_1 may be disposed on the bottom surface of the light blocking member 510, and may have a bottom surface on which the third concave pattern CC3 is formed.
The first engagement member 720_4 may be substantially the same as the engagement member 720_1 of fig. 8B. For example, the second concave pattern CC2_1 of the first coupling member 720_4 may extend in the first direction DR1, and may be repeatedly arranged in the second direction DR 2.
The second coupling member 730_1 may be obtained by turning the first coupling member 720_4 upside down and rotating the first coupling member 720_4 clockwise (or counterclockwise) by 90 degrees with respect to a vertical axis (e.g., an axis perpendicular to one surface of the first coupling member 720_ 4). For example, the third concave patterns CC3 of the second coupling member 730_1 may extend in the second direction DR2, and may be repeatedly arranged in the first direction DR 1.
The second recess pattern CC2_1 of the first coupling member 720_4 and the third recess pattern CC3 of the second coupling member 730_1 may intersect each other and may form a second air passage in a mesh shape.
FIG. 13 is a cross-sectional view of an exemplary panel bottom member.
Referring to fig. 3, 5 and 13, the panel bottom member 20_5 of fig. 13 is different from the panel bottom member 20 of fig. 5 in that the panel bottom member 20_5 of fig. 13 includes a light blocking member 510_2, but does not include the engaging member 720 of fig. 5.
The light blocking member 510_2 may have a bottom surface on which the third concave pattern CC3 is formed and a top surface on which the first concave pattern CC1 is formed.
The first recess pattern CC1 may be substantially the same as the first recess pattern CC1 of fig. 5. Accordingly, any details relating to the omitted description may be understood as at least similar to the corresponding details of the above description.
The third recess pattern CC3 may be substantially the same as the second recess pattern CC2 of fig. 5. For example, the third width D3 of the third concave pattern CC3, the distance between the third concave patterns CC3 (or the width W3 of the third convex pattern CV3 defined by the third concave pattern CC 3), and the third depth T3 of the third concave pattern CC3 may be substantially the same as the second width D2 of the second concave pattern CC2 of fig. 5, the distance between the second concave patterns CC2 of fig. 5 (or the width W2 of the second convex pattern CV2 of fig. 5), and the second depth T2 of the second concave pattern CC2 of fig. 5, respectively.
The third concave pattern CC3 may be formed only on a portion of the bottom surface of the light blocking member 510_2 overlapping the vibroacoustic device 400. For example, the third concave patterns CC3 may not be formed on a portion of the bottom surface of the light blocking member 510_2 overlapping the buffering member 520, but the present disclosure is not limited thereto. For example, a concave pattern different from the third concave pattern CC3 may be formed on a portion of the bottom surface of the light blocking member 510_2 overlapping with the buffer member 520. Alternatively, in the case where a rigid functional layer is disposed between the light blocking member 510_2 and the buffer member 520, the third concave patterns CC3 may be formed on the entire bottom surface of the light blocking member 510_ 2.
The bottom surface of the light blocking member 510_2 may be adhesive, and thus, the vibroacoustic device 400 may be directly coupled to the bottom surface of the light blocking member 510_ 2. For example, no joining member may be interposed between the light blocking member 510_2 and the vibroacoustic device 400.
Fig. 14 and 15 are cross-sectional views of an exemplary panel bottom member.
Referring first to fig. 13 and 14, the panel bottom member 20_6 of fig. 14 differs from the panel bottom member 20_5 of fig. 13 in that the panel bottom member 20_6 of fig. 14 includes a light blocking member 510_ 3.
The light blocking member 510_3 may include a substrate 511, a first light absorbing layer 512, an upper bonding layer 513, a second light absorbing layer 514, and a lower bonding layer 515. The light blocking member 510_3 is different from the light blocking member 510_1 of fig. 9 in that the light blocking member 510_3 further includes a lower bonding layer 515.
The lower bonding layer 515 may be disposed on the bottom surface of the second light absorbing layer 514 (or on the bottom surface of the substrate 511). The lower bonding layer 515 may couple the light blocking member 510_3 and the vibroacoustic device 400 together, and may couple the light blocking member 510_3 and the buffer member 520 together. The lower bonding layer 515 may include an adhesive layer or a resin layer, and may include the same material as the upper bonding layer 513.
A third concave pattern CC3 may be formed on the bottom surface of the lower bonding layer 515. Similarly to the first concave patterns CC1, the third concave patterns CC3 may be formed by coating an adhesive (or an adhesive layer for forming the lower bonding layer 515) on a release film having a convex pattern corresponding to the third concave patterns CC3 and laminating and drying the substrate 511 of the light blocking member 510_3 (or the substrate 511 coupled with the second light absorbing layer 514).
As shown in fig. 14, the third concave patterns CC3 may be formed only on a portion of the bottom surface of the lower bonding layer 515 that overlaps the vibroacoustic device 400. For example, the third concave patterns CC3 may not be formed on the portion of the lower bonding layer 515 overlapping the buffer member 520, but the present disclosure is not limited thereto.
Referring to fig. 13 and 15, the panel bottom member 20_7 is different from the panel bottom member 20_5 of fig. 13 in that the panel bottom member 20_7 of fig. 15 includes a light blocking member 510_4 and an engaging member 720_ 3.
The light blocking member 510_4 is different from the light blocking member 510_2 of fig. 13 in that the light blocking member 510_4 of fig. 15 includes a bottom surface on which a third concave pattern CC3 is formed.
The third recess pattern CC3 may be substantially the same as the third recess pattern CC3 of fig. 10. For example, the third width D3 of the third concave pattern CC3, the distance between the third concave patterns CC3 (or the width W3 of the third convex pattern CV3), and the third depth T3 of the third concave pattern CC3 formed on the bottom surface of the light blocking member 510_4 may be the same as the first width D1 of the first concave pattern CC1, the distance between the first concave patterns CC1 (or the width W1 of the first convex pattern CV1), and the first depth T1 of the first concave pattern CC1, respectively, formed on the top surface of the light blocking member 510_ 4.
The third concave pattern CC3 may be formed only on a portion of the bottom surface of the light blocking member 510_4 overlapping the vibroacoustic device 400. For example, the third concave pattern CC3 may not be formed on a portion of the light blocking member 510_4 overlapping the buffering member 520, but the present disclosure is not limited thereto.
The coupling member 720_3 may be substantially the same as the first coupling member 720_3 of fig. 10. For example, the second width D2 of the second concave pattern CC2, the distance between the second concave patterns CC2 (or the width W2 of the second convex pattern CV2), and the second depth T2 of the second concave pattern CC2 formed on the top surface of the engaging member 720_3 may be the same as the first width D1 of the first concave pattern CC1, the distance between the first concave patterns CC1 (or the width W1 of the first convex pattern CV1), and the first depth T1 of the first concave pattern CC1, respectively, formed on the top surface of the light blocking member 510_ 4.
Therefore, even if the light blocking member 510_4 and the engaging member 720_3 have relatively small concave patterns (or relief patterns), it is possible to prevent generation of bubbles or defects that may be caused by the bubbles during coupling of the light blocking member 510_4 and the vibroacoustic device 400 by allowing the third concave pattern CC3 of the light blocking member 510_4 and the second concave pattern CC2 of the engaging member 720_3 to overlap each other or to directly contact each other.
Fig. 16 is a cross-sectional view of the display device taken along line a-a' of fig. 1 according to an exemplary embodiment of the present disclosure. Fig. 17 is an enlarged sectional view illustrating a portion Q1 of fig. 16.
Referring to fig. 1, 3, 16, and 17, the display device 10_1 of fig. 16 is different from the display device 10 of fig. 3 in that the display device 10_1 of fig. 16 includes a panel bottom member 20_ 8. The panel bottom member 20_8 differs from the panel bottom member 20 of fig. 5 in that the panel bottom member 20_8 further includes a functional layer 540.
The panel bottom member 20_8 may perform a heat dissipation function, an electromagnetic shielding function, a pattern visibility prevention function, a grounding function, a reinforcement function, and/or a digitization function. In this case, the functional layer 540 may be a support substrate, a heat dissipation layer, an electromagnetic shielding layer, an impact absorption layer, a bonding layer, a pressure sensor, and/or a digitizer.
The functional layer 540 may be disposed between the light blocking member 510 and the vibroacoustic device 400 (or the coupling member 720) and between the light blocking member 510 and the buffering member 520.
The functional layer 540 may have substantially the same size and shape as the light blocking member 510, may be disposed under the light blocking member 510, and may be coupled to the bottom surface of the light blocking member 510 by an additional adhesive film.
The functional layer 540 may be a sheet, film layer, coating, panel, and/or panel. The functional layer 540 may consist of a single layer, or may comprise a stack of multiple films or coating layers.
According to an exemplary embodiment of the present disclosure, the functional layer 540 may be a black stripe. Here, the black band may prevent elements (e.g., the vibroacoustic device 400, the cushioning member 520, etc.) disposed thereunder from being visible from above.
According to an exemplary embodiment of the present disclosure, the functional layer 540 may be a digitizer. The digitizer may be coupled to the bottom surface of the light blocking member 510 by an adhesive film.
The digitizer receives information about a location specified by a user on the screen. The digitizer recognizes the movement of, for example, a stylus or finger, and converts the recognized movement into a digital signal. The digitizer may be provided in the form of a film or panel.
Fig. 16 shows only one functional layer, but the present disclosure is not limited thereto. For example, the functional layer 540 may be composed of a stacked body of at least two of a support substrate, a heat dissipation layer, an electromagnetic shielding layer, a pressure sensor, and a digitizer.
FIG. 18 is a cross-sectional view of an exemplary panel bottom member.
Referring to fig. 18, the panel bottom member 20_9 is different from the panel bottom member 20_8 of fig. 17 in that the panel bottom member 20_9 of fig. 18 includes a heat dissipation member 550.
Similar to the functional layer 540 of fig. 17, the heat dissipation member 550 may be disposed between the light blocking member 510 and the vibroacoustic device 400 (or the joining member 720) and between the light blocking member 510 and the buffering member 520.
The heat dissipation member 550 may include at least one heat dissipation layer. The heat dissipation member 550 may include two heat dissipation layers, e.g., a first heat dissipation layer 551 and a second heat dissipation layer 555, and a bonding layer 553.
The first and second heat dissipation layers 551 and 555 may be formed of the same material, or may be formed of different materials having different heat dissipation characteristics. For example, the first heat dissipation layer 551 may include graphite or CNTs. The second heat dissipation layer 555 may block electromagnetic waves, and may include various materials having excellent thermal conductivity. For example, the second heat dissipation layer 555 may include a thin film formed of a metal such as copper, nickel, ferrite, or silver.
The second heat dissipation layer 555 may be disposed below the first heat dissipation layer 551. The first and second heat dissipation layers 551 and 555 may be disposed to overlap each other. The size of the first heat dissipation layer 551 may be smaller than that of the second heat dissipation layer 555, and the sides of the first heat dissipation layer 551 may be disposed inside the sides of the second heat dissipation layer 555.
Bonding layer 553 may be disposed between first heat spreading layer 551 and second heat spreading layer 555. Bonding layer 553 may couple first heat dissipation layer 551 and second heat dissipation layer 555 together and may completely cover first heat dissipation layer 551. Bonding layer 553 may be formed of one of the above examples of materials of bottom bonding layer 530.
According to an exemplary embodiment of the present disclosure, the heat dissipation member 550 may not overlap the vibroacoustic device 400, similar to the buffering member 520. Here, a sufficient space for vibrating the vibration of the acoustic device 400 can be ensured.
Fig. 17 and 18 illustrate the panel bottom members 20_8 and 20_9 as including only one functional layer 540 or including only one heat dissipation member 550, respectively, but the present disclosure is not limited thereto. For example, each of the three layers (e.g., the first heat dissipation layer 551, the bonding layer 553, and the second heat dissipation layer 555) included in the panel bottom member 20_9 may alternatively be one of a support substrate, a heat dissipation layer, an electromagnetic shielding layer, an impact absorption layer, a bonding layer, a pressure sensor, and a digitizer.
Although the exemplary embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention.
