A display device

Abstract

The present invention discloses a display device, comprising: a display panel, a heat dissipation film arranged on the side of the display panel away from the light emitting surface, and an antenna arranged between the display panel and the heat dissipation film and surrounding the display area of ​​the display panel; wherein the heat dissipation film comprises: a carbon nanotube layer, the orthographic projection of the carbon nanotube layer on the plane where the display panel is located at least covers the orthographic projection of the antenna. Since the carbon nanotube layer itself does not have the function of shielding signals, therefore, by at least arranging the carbon nanotube layer at the position corresponding to the antenna, the shielding effect of copper on the antenna signal can be effectively improved, thereby improving the antenna performance; and the carbon nanotube layer has good thermal conductivity, so that while improving the antenna performance, the heat dissipation performance of the display device can also be effectively guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display device. Background Art

[0002] With the arrival of 2019, the first year of 5G, the application of 5G mobile phones will set off a large-scale replacement boom, but consumers still have many concerns about 5G mobile phones. For example: 1. Is the 5G signal quality good? 5G network coverage is a gradual improvement process. While improving network coverage, the ability of mobile phones to receive and send signals is also an important factor affecting mobile phone signals. This requires not only the performance of the antenna, but also the integrated design of all parts of the whole machine; 2. The heat dissipation of 5G display products. With the significant improvement of performance, the power consumption of mobile phones will inevitably increase. The most direct reaction to the increase in power consumption is to emit more heat. The heat dissipation performance of a single module will directly affect the performance of the mobile phone.

[0003] To solve the heat dissipation problem, the relevant technology attaches a heat dissipation film (SCF) to the back of the mobile phone. However, the heat dissipation film uses copper and other metal materials as the heat dissipation substrate, which will shield or interfere with 5G signals and affect antenna performance. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides a display device to improve the antenna performance of a display product.

[0005] Therefore, an embodiment of the present invention provides a display device, comprising: a display panel, a heat dissipation film disposed on a side of the display panel away from a light emitting surface, and an antenna disposed between the display panel and the heat dissipation film and surrounding a display area of ​​the display panel;

[0006] Wherein, the heat dissipation film comprises: a carbon nanotube layer, and the orthographic projection of the carbon nanotube layer on the plane where the display panel is located at least covers the orthographic projection of the antenna.

[0007] In a possible implementation, in the above-mentioned display device provided by an embodiment of the present disclosure, an orthographic projection of the carbon nanotube layer on the plane where the display panel is located completely overlaps with the display panel.

[0008] In a possible implementation, in the display device provided in the embodiment of the present disclosure, the carbon nanotube layer includes: single-walled carbon nanotubes.

[0009] In a possible implementation, in the above-mentioned display device provided by the embodiment of the present disclosure, the axial direction of the single-walled carbon nanotube is perpendicular to the plane where the display panel is located.

[0010] In a possible implementation, in the display device provided in the embodiment of the present disclosure, the thickness of the carbon nanotube layer is 0.05 mm to 0.1 mm.

[0011] In a possible implementation, in the above-mentioned display device provided in the embodiment of the present disclosure, the heat dissipation film further includes: a foam layer located between the carbon nanotube layer and the display panel;

[0012] The orthographic projection of the foam layer on the plane where the display panel is located completely overlaps with the orthographic projection of the carbon nanotube layer.

[0013] In a possible implementation, in the display device provided in the embodiment of the present disclosure, the thickness of the foam layer is 0.08 mm to 0.18 mm.

[0014] In a possible implementation, in the above-mentioned display device provided in the embodiment of the present disclosure, the heat dissipation film further includes: a textured glue filled between the display panel and the foam layer.

[0015] In a possible implementation, in the above-mentioned display device provided in the embodiment of the present disclosure, the display panel further includes: a flexible circuit board;

[0016] The orthographic projection of the flexible circuit board on the plane where the display panel is located does not overlap with the orthographic projection of the antenna.

[0017] In a possible implementation, the display device provided in the embodiment of the present disclosure further includes: a protective cover plate located on one side of the light emitting surface of the display panel, and a light shielding strip located between the protective cover plate and the display panel;

[0018] The orthographic projection of the shading strip on the plane where the display panel is located covers the orthographic projection of the antenna.

[0019] The beneficial effects of the present invention are as follows:

[0020] A display device provided by an embodiment of the present invention includes: a display panel, a heat dissipation film arranged on the side of the display panel away from the light emitting surface, and an antenna arranged between the display panel and the heat dissipation film and surrounding the display area of ​​the display panel; wherein the heat dissipation film includes: a carbon nanotube layer, the orthographic projection of the carbon nanotube layer on the plane where the display panel is located at least covers the orthographic projection of the antenna. Since the carbon nanotube layer itself does not have the function of shielding signals, by at least arranging the carbon nanotube layer at the position corresponding to the antenna, the shielding effect of copper on the antenna signal can be effectively improved, thereby improving the antenna performance; and the carbon nanotube layer has good thermal conductivity, so that while improving the antenna performance, the heat dissipation performance of the display device can also be effectively guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a display device provided by an embodiment of the present invention;

[0022] Figure 2 For along Figure 1 Schematic diagram of the cross-sectional structure along line I-I';

[0023] Figure 3 Schematic diagram of the structure of single-walled carbon nanotube;

[0024] Figure 4 A schematic diagram of another structure of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of the embodiment of the present invention. The thickness and shape of each film layer in the drawings do not reflect the actual proportion, and the purpose is only to illustrate the content of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the invention belongs. The words "first", "second" and similar terms used in the specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Inside", "outside", "upper", "lower" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] A display device provided in an embodiment of the present invention may be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, a smart watch, a fitness wristband, a personal digital assistant, or the like.

[0028] Specifically, an embodiment of the present invention provides a display device, such as Figure 1 and Figure 2As shown, it includes: a display panel 001, a heat dissipation film 002 disposed on a side of the display panel 001 away from a light emitting surface, and an antenna 003 disposed between the display panel 001 and the heat dissipation film 002 and surrounding a display area AA of the display panel 001;

[0029] The heat dissipation film 002 includes a carbon nanotube layer 201 , and the orthographic projection of the carbon nanotube layer 201 on the plane where the display panel 001 is located at least covers the orthographic projection of the antenna 003 .

[0030] In the above-mentioned display device provided by the embodiment of the present invention, since the carbon nanotube layer 201 itself does not have the function of shielding signals, by arranging the carbon nanotube layer 201 at least at the position corresponding to the antenna 003, the shielding effect of copper on the antenna 003 signal can be effectively improved, thereby improving the performance of the antenna 003. In addition, the carbon nanotube layer 201 has good thermal conductivity, so that while improving the performance of the antenna 003, the heat dissipation performance of the display device can also be effectively guaranteed.

[0031] It should be noted that in Figure 1 The figure only illustrates a possible implementation of the antenna 003. In an actual product, the antenna 003 may be composed of multiple independent parts, which is not limited here.

[0032] Optionally, in the above display device provided by the embodiment of the present invention, if Figure 1 and Figure 2 As shown, the orthographic projection of the carbon nanotube layer 201 on the plane where the display panel 001 is located completely overlaps with the display panel 001 .

[0033] To ensure the quality of 5G signals, general 5G communication products (such as mobile phones) will adopt Massive MIMO antenna technology, which requires at least 8 antennas to be built into the mobile phone, and each antenna has its own power amplifier. The mobile phone antenna is an omnidirectional antenna, which means that the signal radiation intensity in all directions of the 360° cross section of the antenna 003 is the same to achieve the best communication effect. To achieve omnidirectional communication, a sufficiently open space (clearance) is required around the antenna in the mobile phone, and there must be no shielding or interference. By setting a carbon nanotube layer 201 whose orthographic projection completely overlaps with the display panel 001, it is equivalent to replacing the copper metal layer contained in the heat dissipation film 002 in the related art with a carbon nanotube layer 201 set on the entire surface, so that the signals in all directions of the 360° cross section of the antenna 003 will not be shielded, which significantly improves the performance of the antenna 003 and realizes omnidirectional communication.

[0034] Optionally, in the display device provided by the embodiment of the present invention, the carbon nanotube layer 201 includes: Figure 3 Single-walled carbon nanotubes (SWCNTS) shown.

[0035] Single-walled carbon nanotubes are one-dimensional quantum materials with a special structure (nanometer-level radial dimensions and micrometer-level axial dimensions). They are seamless tubes formed by curling graphite sheets. Their excellent mechanical properties, electrical properties, extremely high thermal conductivity, good thermal stability and chemical stability all give them broad application prospects in many fields such as nanostructures and functional composite materials, field effect transistors, transparent electrodes, lithium-ion batteries, and supercapacitors.

[0036] The excellent performance of single-walled carbon nanotubes is specifically manifested as follows: single-walled carbon nanotubes are the best known thermal conductive material, and the speed of transferring heat energy in one dimension can reach 10,000 m / s. Proper arrangement of single-walled carbon nanotubes can obtain very high anisotropic thermal conductive materials; electrons in the radial direction of single-walled carbon nanotubes (i.e. Figure 3 The movement in the axial direction (i.e. Figure 3 The movement of single-walled carbon nanotubes (in the direction perpendicular to the paper) is unrestricted, and they are considered to be ballistic conductors, with electrical conductivity second only to superconductors. Due to the short distance between carbon atoms in single-walled carbon nanotubes and the small diameter of single-layer single-walled carbon nanotubes, defects in the structure are not easy to exist, and they exhibit extremely high strength and great toughness. When axial pressure is applied or the single-walled carbon nanotubes are bent, when the external pressure exceeds the strength limit or bending strength of the single-walled carbon nanotubes, the single-walled carbon nanotubes will not break, but will bend at a large angle, curl and twist together to form a "twisted" object, and the carbon nanotubes will return to their original shape after the external force is released.

[0037] Based on the excellent performance of single-walled carbon nanotubes, by using single-walled carbon nanotubes to achieve demetallization of the display device to improve the performance of the antenna 003, the strength and folding and stretching performance of the display device can also be increased, which has a wide range of application prospects in flexible OLED modules. Of course, in specific implementation, the carbon nanotube layer 201 can also include multi-walled carbon nanotubes, which is not specifically limited here.

[0038] Optionally, in the display device provided in the embodiment of the present invention, the axial direction of the single-walled carbon nanotube is perpendicular to the plane where the display panel 001 is located. Since the speed at which the single-walled carbon nanotube transfers heat energy in one-dimensional direction (specifically the axial direction) can reach 10000 m / s, by setting the axial direction of the single-walled carbon nanotube to be perpendicular to the plane where the display panel 001 is located, it is beneficial to quickly conduct away the heat generated by the display panel 001.

[0039] Optionally, in the display device provided by the embodiment of the present invention, the thickness of the carbon nanotube layer 201 is 0.05 mm to 0.1 mm, such as 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, etc.

[0040] Since the carbon nanotube layer 201 not only has the function of heat dissipation, but also provides a buffering material to a certain extent, the carbon nanotube layer 201 with a thickness of 0.05 mm to 0.1 mm can not only effectively enhance the strength of the display device, but also buffer external forces and protect the display device, thereby improving the anti-fall performance of the display device.

[0041] Optionally, in the above display device provided by the embodiment of the present invention, if Figure 2 As shown, the heat dissipation film 002 may further include: a foam layer (Foam) 202 located between the carbon nanotube layer 201 and the display panel 001;

[0042] The orthographic projection of the foam layer 202 on the plane where the display panel 001 is located completely overlaps with the orthographic projection of the carbon nanotube layer 201 .

[0043] Specifically, the material of the foam layer 202 can be polyurethane (PU) foam, conductive foam, aluminum foil foam, rubber (CR) foam, etc. Therefore, the thermal conductivity is good, and the heat generated by the display panel 001 can be quickly conducted away. At the same time, since the orthographic projection of the foam layer 202 on the plane where the display panel 001 is located completely coincides with the orthographic projection of the carbon nanotube layer 201, the contact area between the foam layer 202 and the carbon nanotube layer 201 is ensured to be large, so that the heat conducted away by the foam layer 202 can be further conducted away by the carbon nanotube layer 201, so that the heat dissipation performance of the heat dissipation film 002 is better.

[0044] Optionally, in the display device provided in the embodiment of the present disclosure, the thickness of the foam layer 202 is 0.08 mm to 0.18 mm, such as 0.08 mm, 0.09 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, etc. The foam layer 202 has a moderate thickness, which is conducive to the rapid conduction of heat, and can also buffer external forces, play a role in protecting the display device, and further improve the anti-fall performance of the display device.

[0045] Optionally, in the above display device provided by the embodiment of the present invention, if Figure 2 As shown, the heat dissipation film 002 further includes: an EMBO 203 filled between the display panel 001 and the foam layer 202 .

[0046] The textured adhesive 203 itself has good viscosity, making it easier, more convenient and faster to assemble the heat dissipation film 002 on the display device, greatly improving production efficiency. In addition, the textured adhesive 203 can be bent, which is suitable for flexible OLED display modules. Since the textured adhesive 203 mainly plays a bonding and fixing role, the thickness of the textured adhesive 203 is not specifically limited here. For example, the thickness of the textured adhesive 203 can be 0.03 mm. In actual application, the thickness can be set as needed.

[0047] Generally, if Figure 2 As shown, the display panel 001 may include: a stacked protective film 101, a display module 102, a first transparent adhesive 103, a touch module 104, a polarizer 105, and a second transparent adhesive 106. Optionally, the display module 102 is a flexible OLED display module. Other essential components of the display panel 001 are well understood by those skilled in the art, and are not described in detail herein, nor should they be used as limitations to the present invention.

[0048] Optionally, in the above display device provided in the embodiment of the present disclosure, if Figure 4 As shown, the display panel 001 also includes: a flexible circuit board for Figure 2 The display panel 001 of the structure shown, the flexible circuit board may specifically include a touch flexible circuit board (T-FPC) 1071 and a display flexible circuit board (M-FPC) 1072;

[0049] The orthographic projection of the flexible circuit board on the plane where the display panel 001 is located does not overlap with the orthographic projection of the antenna 003. For example, the touch flexible circuit board 1071 is designed with a relative position of center routing and bonding relative to the lower border of the display panel 001. In this way, more clearance area C can be provided, thereby further improving the performance of the antenna 003 in the full-screen mobile phone.

[0050] Optionally, in the above display device provided by the embodiment of the present invention, if Figure 2 As shown, it also includes: a protection cover plate 004 located on one side of the light emitting surface of the display panel 001, and a light shielding strip 005 located between the protection cover plate 004 and the display panel 001;

[0051] The orthographic projection of the shading strip 005 on the plane where the display panel 001 is located covers the orthographic projection of the antenna 003 .

[0052] The shading strip 005 can shield the antenna 003, preventing the antenna 003 from being observed, thereby improving the product appearance experience. In addition, the shading strip 005 can also solve the problem of light leakage at the edge of the display panel 001. Specifically, the shading strip 005 can be ink or black tape.

[0053] The display device provided by the embodiment of the present invention comprises: a display panel, a heat dissipation film arranged on the side of the display panel away from the light emitting surface, and an antenna arranged between the display panel and the heat dissipation film and surrounding the display area of ​​the display panel; wherein the heat dissipation film comprises: a carbon nanotube layer, the orthographic projection of the carbon nanotube layer on the plane where the display panel is located at least covers the orthographic projection of the antenna. Since the carbon nanotube layer itself does not have the function of shielding signals, therefore, by at least arranging the carbon nanotube layer at the position corresponding to the antenna, the shielding effect of copper on the antenna signal can be effectively improved, thereby improving the antenna performance; and the carbon nanotube layer has good thermal conductivity, so that while improving the antenna performance, the heat dissipation performance of the display device can also be effectively guaranteed.

[0054] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A display device, characterized in that: include: A display panel, a heat dissipation film disposed on a side of the display panel away from a light emitting surface, and an antenna disposed between the display panel and the heat dissipation film and surrounding a display area of ​​the display panel; Wherein, the heat dissipation film comprises: a carbon nanotube layer, the orthographic projection of the carbon nanotube layer on the plane where the display panel is located at least covers the orthographic projection of the antenna; The heat dissipation film further includes: a foam layer located between the carbon nanotube layer and the display panel, and a textured glue filled between the display panel and the foam layer; The display device further comprises a flexible circuit board, wherein an orthographic projection of the flexible circuit board on the plane where the display panel is located does not overlap with an orthographic projection of the antenna; The display device further includes a protective cover plate located on one side of the light emitting surface of the display panel, and a shading strip located between the protective cover plate and the display panel; the orthographic projection of the shading strip on the plane where the display panel is located covers the orthographic projection of the antenna.

2. The display device according to claim 1, wherein: The orthographic projection of the carbon nanotube layer on the plane where the display panel is located completely overlaps with the display panel.

3. The display device according to claim 1, wherein: The carbon nanotube layer includes single-walled carbon nanotubes.

4. The display device according to claim 3, characterized in that The axial direction of the single-walled carbon nanotube is perpendicular to the plane where the display panel is located.

5. The display device according to claim 1, wherein: The thickness of the carbon nanotube layer is 0.05 mm to 0.1 mm.

6. The display device according to any one of claims 1 to 5, characterized in that: The orthographic projection of the foam layer on the plane where the display panel is located completely overlaps with the orthographic projection of the carbon nanotube layer.

7. The display device according to claim 6, wherein: The thickness of the foam layer is 0.08 mm to 0.18 mm.

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