A flexible screen

Abstract

The present invention relates to a flexible screen, comprising: a display substrate (1), the display substrate (1) comprising a first part (11), a second part (12) and a third part (13) which are connected in sequence, the second part (12) being bent to form an end of the flexible screen; and a support plate (2) for supporting the display substrate (1), wherein the first part (11) and the third part (13) of the display substrate (1) are opposite to each other, the support plate (2) is between the first part (11) and the third part (13) of the display substrate (1), and one end of the support plate (2) faces a surface of the second part (12); and an end heat dissipation device is provided on the surface of the second part (12) facing the support plate (2).

Description

Technical Field

[0001] The present disclosure relates to the field of flexible screens. Background Art

[0002] In the field of smart phones, LCD TVs and computer monitors, people are looking for full-screen displays with ultra-high screen-to-body ratios, and flexible screens are widely used. In order to achieve a better full-screen display effect, the flexible screen is usually bent. Specifically, the display substrate of the flexible screen is bent to the back, thereby reducing the width of the flexible screen frame and increasing the screen-to-body ratio. Summary of the invention

[0003] The present disclosure relates to a flexible screen, comprising: a display substrate, the display substrate comprising a first part, a second part and a third part which are connected in sequence, the second part being bent to form an end of the flexible screen; and a support plate for supporting the display substrate, wherein the first part and the third part of the display substrate are opposite, the support plate is between the first part and the third part of the display substrate and one end of the support plate faces a surface of the second part; wherein an end heat dissipation device is provided on the surface of the second part facing the support plate.

[0004] In one embodiment, the flexible screen further comprises at least one heat dissipation film, which is on the surface of the first part and / or the third part facing the support plate, and further improves the heat dissipation of the entire flexible screen.

[0005] In one embodiment, the first portion is a display area for displaying, and the third portion is a non-display area for carrying electronic components. Obviously, the display area or the non-display area can be interchangeable.

[0006] In one embodiment, the end heat dissipation device is heat dissipation silica gel, which can advantageously conduct away the heat generated by the second part.

[0007] Preferably, the shape of the heat dissipating silicone is conformal to the shape formed by the surface of the second part of the display substrate facing the supporting plate. This conformal shape allows the heat dissipating silicone to completely fit with the surface of the second part facing the supporting plate, thereby allowing the heat generated on the second part to be conducted away more quickly and effectively.

[0008] More preferably, the heat dissipating silicone rubber contacts the support plate and is pressed by the end of the support plate to make the surface fit with the surface of the second part of the display substrate. With this configuration, the support plate presses the end of the heat dissipating silicone rubber against the surface of the second part with a certain prestress, further ensuring that the heat dissipating silicone rubber fits the second part fully.

[0009] In one embodiment, the end heat sink is a heat dissipation film on the surface of the second portion facing the support plate. The heat dissipation film as the end heat sink advantageously transfers heat away.

[0010] More preferably, the flexible screen also includes a pressing block, which contacts the heat dissipation film at the second part of the display substrate and is used to apply force to the heat dissipation film so that the heat dissipation film is pressed against the second part; regardless of whether the third part is provided with a heat dissipation film, the pressing block can ensure sufficient and effective contact between the heat dissipation film and the second part.

[0011] Preferably, the pressing block is fixed on the support plate, so the support plate can provide a force for the pressing block to act on the heat dissipation film, thereby promoting effective contact between the heat dissipation film and the second part.

[0012] Preferably, the pressing block is a flexible pressing block, which can provide a certain pre-tightening force to ensure sufficient contact between the heat dissipation film and the second part.

[0013] Preferably, the heat dissipation film can be formed of the following materials: artificial graphite, natural graphite, graphene, nanocarbon, copper foil, thermal conductive silicone or a composite material formed of artificial graphite, natural graphite, graphene, nanocarbon, copper foil, thermal conductive silicone. The material selected for the heat dissipation film should ensure good thermal conductivity, thereby promoting heat dissipation of the entire flexible screen.

[0014] In one embodiment, the heat dissipation film on the second part is smoothly connected to the heat dissipation film on the first part and / or the third part. This smooth connection constitutes a heat dissipation system without gaps on the first part and / or the third part and the second part, ensuring sufficient and effective heat dissipation.

[0015] More preferably, the heat dissipation film on the second part and the heat dissipation film on the first part and / or the third part are formed of a single material, which effectively dissipates heat and is easier to manufacture.

[0016] The support plate is a single-layer material plate. Due to the good heat dissipation on the second part and the third part, less material can be used for the support plate. By using a single-layer material, the thickness of the flexible screen can be reduced and the weight of the flexible screen can be made lighter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of a display substrate of a currently existing flexible screen before being bent, wherein the back film in the bending area is removed so as to be able to be bent;

[0018] Figure 2 It is a schematic diagram of the structure of the display substrate of the currently existing flexible screen after being bent;

[0019] Figure 3is a three-dimensional diagram of a flexible screen according to a first embodiment of the present invention;

[0020] Figure 4 is an enlarged view of an end portion of a flexible screen according to a first embodiment of the present invention;

[0021] Figure 5 is a cross-sectional structural diagram of an end portion of a flexible screen according to a first embodiment of the present invention, wherein the end portion heat dissipation device is a heat dissipation silica gel disposed on a bending area of ​​a display substrate;

[0022] Figure 6 is a stereoscopic diagram of a flexible screen according to a second embodiment of the second embodiment of the present invention;

[0023] Figure 7 is an enlarged view of an end portion of a flexible screen according to a second embodiment of the invention;

[0024] Figure 8 is a cross-sectional structural diagram of an end portion of a flexible screen according to a second embodiment of the present invention, wherein the end heat dissipation device is a heat dissipation film arranged on a bending area of ​​a display substrate, and the heat dissipation film arranged on the bending area and the heat dissipation film on the display area and the heat dissipation film on the non-display area are formed of a single material; DETAILED DESCRIPTION

[0025] Figure 1 and Figure 2 A schematic diagram of the structure of a flexible screen used in the prior art is shown. As shown in the figure, the display screen includes a display substrate 1, and the display substrate 1 includes a first part 11 (display area) for displaying an image, a second part 12 (bending area) for bending the display substrate 1 to form an end of the display screen, and a third part 13 (non-display area) for carrying electronic components such as a display driving circuit and a flexible circuit board. During the manufacturing process of the display substrate 1, in order to keep the display substrate 1 flat, a back film 5 is bonded to the back of the display substrate 1. In the process of manufacturing the display screen and bending the display substrate 1, the back film on the back of the second part 12 needs to be removed for bending. After bending, as shown in FIG. Figure 2 As shown, the first part 11 and the second part 12 are arranged opposite to each other. During the manufacturing process of the display screen, a support plate 2 as shown in the figure is provided to support the display substrate of the entire display screen, and the support plate 2 is arranged between the first part 11 and the third part 13 of the display substrate 1. A resin glue 6 is provided on the outside of the flexible screen formed by the second part 12, and the resin glue 6 has a certain protective effect on the bending area, making it not easy to break.

[0026] In the existing flexible screen, as far as the heat dissipation structure is concerned, in order to dissipate heat from the display screen, a heat dissipation film 4 is usually only provided on one side of the support plate 2 close to the first portion 11, such as Figure 1 and2 As shown. The heat dissipation film 4 is generally arranged adjacent to the back film 5 on the back side of the first part 11, and the heat dissipation film 4 is in contact with the support plate 2, and the support plate 4 is usually made of metal, which is conducive to conducting the heat from the first part 11 through the heat dissipation film 4, the support plate 2, etc., so as to dissipate heat. Generally, no heat dissipation film is provided in the second part 12 and the third part 13 of the display substrate 1, resulting in that the heat in the second part 12 and the third part 13 is not easily conducted out, especially for the bending area, which is particularly prone to the problem of heat concentration. Part of the second part 12 and the third part 13 are in contact with the support plate 2, so part of the heat can be conducted out through the support plate 2. In this case, the support plate 2 generally adopts a double-layer setting, which increases the overall thickness of the flexible screen, and the problem of heat concentration in the second part 12 and the third part 13 has not been fundamentally solved.

[0027] In order to improve the heat dissipation of the flexible screen while taking into account the support and protection of the flexible screen, the present disclosure proposes a flexible screen, which improves the defect of insufficient heat dissipation of the existing flexible screen by adding a heat dissipation device in the bending area of ​​the display substrate 1.

[0028] Figure 3-Figure 8 shows a flexible screen according to the present disclosure, Figures 3 to 5 The flexible screen according to the first embodiment of the present invention is shown, wherein an end heat dissipation device of heat dissipation silica gel is provided. Figures 6 to 8 The heat dissipation screen according to the second embodiment of the present invention is shown, wherein an end heat dissipation device which is a heat dissipation film is provided. Figures 1 to 2Like the flexible screen shown in , the display substrate 1 includes a first part 11 connected in sequence, a second part 12 for bending the display substrate to form the end of the flexible screen, and a third part. Specifically, the first part 11 is a display area for displaying, and the third part 13 is a non-display area for carrying electronic components. The first part 11, the second part 12, and the third part 13 are on the same plane before being bent, and a back film 5 is provided on the back to make the entire display substrate 1 flat. When bending is to be performed, the back film on the second part 12 is removed and the second part is bent, so that after bending, the first part 11 and the third part 13 of the display substrate 1 are arranged relative to each other. The support plate 2 is arranged between the first part 11 and the third part 13 to provide support for the entire display substrate 1. In addition to the heat dissipation structure that can be provided with a heat dissipation film 4 on the back side of the first part 11 similar to the prior art, the flexible screen provided by the present disclosure is also provided with a heat dissipation device, especially on the second part 12 that is bent, which effectively improves the heat dissipation of the flexible screen. In one embodiment, a heat sink is provided on the surface of the second portion 12 of the display substrate 1 facing the support plate 2. In a preferred embodiment, a heat sink is provided on the surface of the first portion 11 and the second portion 12 of the display substrate 1 facing the support plate 2. In a more preferred embodiment, a heat sink is provided on the surface of the first portion 11, the second portion 12 and the third portion 13 of the display substrate 1 facing the support plate 2.

[0029] exist Figures 3 to 8 In the embodiment shown, the heat dissipation device used for the third part 13 is the heat dissipation film 4 which is the same as the heat dissipation device used for the first part 11. The advantage of this is that, in addition to the good heat dissipation of the third part 13, a symmetrical structure is formed on both sides of the support plate 2. This symmetrical structure has a good effect on the arrangement and positioning of the end heat dissipation device.

[0030] In particular, in one embodiment, the third portion 13 which is a non-display area may also adopt the currently conventional configuration of not setting a heat dissipation film, and only set an end heat dissipation device at the position of the second portion 12 which forms the end of the display screen.

[0031] exist Figures 3 to 5 In the first embodiment shown, an end heat sink is provided on the surface of the second portion 12 facing the support plate 2. The end heat sink is a heat dissipation silicone 3. The heat dissipation silicone 3 is pressed against the second portion 12 of the display substrate and is in close contact with the second portion 12 of the display substrate. The enlarged structure of the end heat sink of the heat dissipation silicone 3 is Figure 5. The heat dissipating silicone 3 is in contact with the support plate 2 and the support plate 2 presses the heat dissipating silicone 3 against the second part 12. In one embodiment, the heat dissipating silicone 3 can be fixed on the support plate 2, and it is conceivable that the heat dissipating silicone 3 can also be simply sleeved on the support plate 2 without being fixed. The heat dissipating silicone 3 absorbs heat from the second part 12 by contacting with the second part 12, and transfers the heat to the support plate 2 by contacting with the support plate 2, and the support plate 2 is optionally made of metal, thereby accelerating the heat dissipation. Since the heat dissipating silicone 3 has a certain elasticity, the heat dissipating silicone 3 can be pressed against the bending area 12 of the display substrate 1 with a certain amount of compression, thereby ensuring the close contact between the heat dissipating silicone 3 and the bending area 12, and promoting the heat dissipation of the bending area 12. In order to make the heat dissipating silicone 3 have a certain amount of compression, the thickness of the heat dissipating silicone 3 should be greater than the sum of the thicknesses of the supporting plate 2, the heat dissipating film 4 arranged on the first part 11 (and the heat dissipating film 4 arranged on the third part 13, if the third part 13 is also provided with a heat dissipating film 4), and the back film 5 at the first part 11 and the third part 13. That is to say, the thickness of the heat dissipating silicone 3 should be greater than the thickness of the arc segment formed by the surface of the second part 12 of the display substrate 1 facing the supporting plate 2.

[0032] In order to ensure good contact between the heat dissipating silicone 3 and the second portion 12, the shape of the heat dissipating silicone 3 in contact with the second portion 12 of the display substrate 1 is a shape corresponding to the bending shape of the second portion 12, that is, the shape of the heat dissipating silicone is conformal to the shape formed by the surface of the second portion of the display substrate facing the support plate. In other words, the shape of the heat dissipating silicone 3 is an arc corresponding to the bending arc segment of the second portion 12, so that the heat dissipating silicone 3 is well fitted with the bending area 12, thereby ensuring heat dissipation.

[0033] It is conceivable that in addition to the heat dissipation silicone mentioned above, any material suitable for heat dissipation can be used to make the end heat dissipation device according to the present disclosure. Optionally, the material suitable for heat dissipation has a certain elasticity. When the heat dissipation material has a certain elasticity, the thickness of the heat dissipation material 3 should be greater than the sum of the thicknesses of the support plate 2, the heat dissipation film 4 arranged on the first part 11 (and the heat dissipation film 4 arranged on the third part 13, if the third part 13 is also provided with a heat dissipation film 4), and the back film 5 at the first part 11 and the third part 13. In some embodiments, when the heat dissipation material is not elastic, the thickness of the heat dissipation material 3 should be equal to the sum of the thicknesses of the support plate 2, the heat dissipation film 4 arranged on the first part 11 (and the heat dissipation film 4 arranged on the third part 13, if the third part 13 is also provided with a heat dissipation film 4) and the back film 5 at the first part 11 and the third part 13.

[0034] exist Figure 6-8In the embodiment shown, the end heat dissipation device is a heat dissipation film 4, and the heat dissipation film 4 is pressed against the second portion 12 of the display substrate 1. Figure 6-8 It can be seen from the figure that in the case where both the first part 11 and the third part 13 have heat dissipation films, the heat dissipation film 4 as the end heat dissipation device is connected to the heat dissipation film 4 on the first part 11 and the third part 13 on both sides of the support plate 2, and more particularly, the heat dissipation film 4 as the end heat dissipation device is smoothly connected to the heat dissipation film 4 on the first part 11 and the third part 13 on both sides of the support plate 2. More particularly, in the manufacturing process, the heat dissipation film 4 used for the display substrate 1 is a whole heat dissipation film, that is, the whole heat dissipation film 4 is made of a single material, and more particularly, the whole heat dissipation film 4 is a single heat dissipation film, and the heat dissipation device of the whole heat dissipation film is respectively in contact with the first part 11, the second part 12 and the third part 13 of the heat dissipation substrate 1, so that the setting and positioning of the heat dissipation device are easier. In an embodiment not shown in the drawings, if a heat dissipation film is arranged only on one of the first part 11 or the third part 13, the heat dissipation film 4 as the end heat dissipation device can be connected to the heat dissipation film arranged on the first part or the third part, or formed as a single heat dissipation film. Alternatively, it is conceivable that the heat dissipation films on the first part 11 , the second part 12 , and the third part 13 are not connected, but have gaps between them.

[0035] Although in the examples shown in the drawings, the heat dissipation films 4 located in the first part 11, the second part 12 and the third part 13 have the same thickness. It is conceivable that in some embodiments not shown in the drawings, the heat dissipation films 4 located at different positions may have different characteristics and parameters, such as their thickness, or the materials forming them may be different, which is conducive to improving heat dissipation in some cases. In this case, the heat dissipation film 4 constituting the entire heat dissipation structure is composed of two or three heat dissipation films with different parameters connected together. In an embodiment not shown in the drawings, no heat dissipation film is provided in the third part 13, so that the heat dissipation film 4 as the end heat dissipation device is connected to the heat dissipation film on the first part 11, and the entire heat dissipation film 4 is still made of a single material, that is, it is still a single piece of heat dissipation film, and accordingly, the heat dissipation device of the entire heat dissipation film is in contact with the first part 11 and the second part of the heat dissipation substrate 1 respectively. Similarly, as described above, the heat dissipation films 4 located in different parts can still have the same or different parameters.

[0036] In an embodiment of the present invention, the heat dissipation film can be formed of the following materials: artificial graphite, natural graphite, graphene, nanocarbon, copper foil, thermal conductive silicone or a composite material formed of artificial graphite, natural graphite, graphene, nanocarbon, copper foil, thermal conductive silicone. Alternatively, the heat dissipation film can also be made of other materials, as long as the material of the selected heat dissipation film should ensure good thermal conductivity, thereby promoting heat dissipation of the entire flexible screen.

[0037] Optionally, the heat dissipation structure further comprises a pressing block 7 which contacts the heat dissipation film 4 at the second portion 12 of the display substrate 1 and is used to apply force to the heat dissipation film 4 so that it is pressed against the surface of the second portion 12, and the pressing block 7 is fixed to the end of the support plate 2. Optionally, the pressing block 7 is an elastic pressing block, which can elastically press the heat dissipation film 4 against the inner surface of the second portion 12 of the display substrate 1 with a certain amount of compression, thereby ensuring good contact between the heat dissipation film 4 and the second portion 12 of the display substrate 1, thereby ensuring good heat dissipation. Figure 4 The pressing block 7 shown has a symmetrical structure with respect to the support plate 2. Specifically, the pressing block 7 is made of foam glue. The foam glue has a certain elasticity and can press the heat dissipation film 4 against the display substrate 1 with a certain amount of compression. It is conceivable that the elastic pressing block 7 can be made of other elastic materials, such as rubber, elastomeric materials, etc. in addition to being made of foam glue. In order to achieve a certain amount of compression of the elastic pressing block, the thickness of the elastic pressing block should be greater than the thickness of the arc segment formed by the surface of the heat dissipation film 4 on the second part 12 facing the support plate 12. When the heat dissipation film 4 is provided on the first part 11 and the third part 13, the thickness of the elastic pressing block should be greater than the sum of the thicknesses of the back films 5 on the first part 11 and the third part 13.

[0038] It is conceivable that, in some embodiments, the pressure block 7 may not be elastic. In this case, the thickness of the elastic pressure block should be equal to the thickness of the arc segment formed by the surface of the heat dissipation film 4 on the second part 12 facing the support plate 12. When the heat dissipation film 4 is provided on the first part 11 and the third part 13, the thickness of the elastic pressure block should be equal to the sum of the thicknesses of the back films 5 on the first part 11 and the third part 13.

[0039] The thickness of the pressing block should be equal to the sum of the thicknesses of the backing film 5 on both sides of the first portion 11 and the third portion 13 .

[0040] and Figure 3 Similar to the embodiment shown in , the pressing block 7 should have a shape corresponding to the inner side of the heat dissipation film in contact with the second portion 12. Since the heat dissipation film 4 is closely attached to the inner surface of the bending area 12, that is, the shape formed by the heat dissipation film 4 should be an arc corresponding to the arc segment of the bending of the second portion 12, the pressing block 7 should have an arc shape corresponding to the arc segment of the bending of the second portion 12. The arc shape of the pressing block 2 is particularly suitable for fully pressing the heat dissipation film 4 against the second portion 12 of the display substrate 1.

[0041] Preferably, the support plate 2 is formed of a single layer of material. Specifically, the support plate 2 can be composed of a single layer of steel plate. Figure 1 and Figure 2Compared with the support plate 2 formed of a double-layer material, the support plate 2 formed of a single layer of material can make the thickness of the flexible screen smaller. Of course, it is also possible to use a support plate 2 of a double-layer steel plate in the heat dissipation screen of the present disclosure.

[0042] For those skilled in the art, various modifications and variations may be made to the embodiments disclosed above without departing from the scope or spirit of the present invention. Other embodiments of the present invention will be apparent to those skilled in the art from the practice of the present invention disclosed in this specification. This specification and the examples disclosed therein should be considered to be illustrative only, and the true scope of the present invention is specified by the appended claims and their equivalents.

Claims

1. A flexible screen, comprising: A display substrate (1) comprises a first part (11) connected in sequence, a second part (12) bent to form an end portion of a flexible screen, and a third part (13); and a support plate (2) for supporting the display substrate (1), The first part (11) and the third part (13) of the display substrate (1) are opposite to each other, the support plate (2) is between the first part (11) and the third part (13) of the display substrate (1), and one end of the support plate (2) faces one surface of the second part (12); Wherein, an end heat dissipation device is provided on the surface of the second part (12) facing the support plate (2); The end heat dissipation device is a heat dissipation film (4) on the surface of the second part (12) facing the support plate; The flexible screen further comprises a pressing block (7), wherein the pressing block (7) contacts the heat dissipation film (4) at the second part (12) of the display substrate (1) and is used to apply force to the heat dissipation film (4) so ​​that the heat dissipation film is pressed against the second part (12).

2. The flexible screen according to claim 1, wherein: The flexible screen further comprises a heat dissipation film on the surface of the first part (11) and / or the third part (13) facing the support plate (2).

3. The flexible screen according to claim 1, wherein: The pressing block (7) is fixed on the supporting plate (2).

4. The flexible screen according to claim 3, wherein: The pressing block (7) is a flexible pressing block.

5. The flexible screen according to claim 1, wherein: The heat dissipation film (4) is formed of the following materials: artificial graphite, natural graphite, graphene, nano-carbon, copper foil, thermal conductive silica gel or a composite material formed of artificial graphite, natural graphite, graphene, nano-carbon, copper foil and thermal conductive silica gel.

6. The flexible screen according to claim 2, wherein: The heat dissipation film (4) on the second part (12) is smoothly connected to the heat dissipation film (4) on the first part (11) and / or the third part (13).

7. The flexible screen according to claim 6, wherein: The heat dissipation film (4) on the second portion (12) and the heat dissipation film (4) on the first portion (11) and / or the third portion (13) are formed of a single material.

8. The flexible screen according to claim 1, wherein: The support plate (2) is a single-layer material plate.

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