CN220137872U - Support backboard and display device - Google Patents

Abstract

The utility model discloses a support backboard and a slide roll display device, wherein the support backboard is attached to the surface of a flexible display panel, the support backboard comprises a plurality of composite carbon fiber material layers, the support backboard is provided with a first bending area, a second bending area and a third bending area which are respectively positioned at two sides of the first bending area, a plurality of first through holes are formed in the first bending area in an array mode, and a plurality of second through holes are formed in the second bending area and the third bending area in an array mode respectively. The support backboard is made of the multi-layer composite carbon fiber material, the weight of a product can be greatly reduced, and the bending performance of the support backboard can be improved, the stress generated during bending is reduced, and the problem of breakage during bending is avoided by arranging the first through holes in the first bending region and arranging the second through holes in the second bending region and the third bending region.

Description

Support backboard and display device

Technical Field

The utility model relates to the technical field of display. And more particularly, to a support back plate and a display device.

Background

With the development of display technology, the application field of display devices is very wide, and the requirements of people on various performances of display screens are gradually improved. The flexible display screen has characteristics of being bendable, crimpable, and the like, and by utilizing the characteristics, the display device can be crimped or folded, thereby bringing convenience to people to carry and use the display device, for example, a folded organic light emitting display device is used in a folding mobile phone.

At present, the back support plate on the back of the folding display panel is mainly a metal sheet, such as a stainless steel plate, a titanium alloy plate and the like, and the weight of the metal sheet is large, so that the weight of a product is not reduced.

Disclosure of Invention

The utility model aims to provide a support backboard and a display device, wherein the support backboard can provide enough support force for a flexible display panel, is easy to bend, has good bending performance and is light in weight.

According to one aspect of the present utility model, there is provided a support back plate attached to a surface of a flexible display panel, the support back plate including a plurality of composite carbon fiber material layers, the support back plate being provided with a first bending region, and a second bending region and a third bending region respectively located at two sides of the first bending region, the first bending region being provided with a plurality of first through holes in an array, and the second bending region and the third bending region being provided with a plurality of second through holes in an array respectively.

Optionally, the multiple composite carbon fiber material layers include a first support layer, a second support layer, and a third support layer that are stacked, and each of the first support layer, the second support layer, and the third support layer includes a resin and carbon fibers impregnated in the resin.

Optionally, the extending directions of the first supporting layer and the third supporting layer are the same, and the extending direction of the first supporting layer carbon fiber is perpendicular to the bending direction of the first bending region, and the extending direction of the second supporting layer carbon fiber is perpendicular to the extending direction of the first supporting layer carbon fiber.

Optionally, the thickness of the first supporting layer is equal to the thickness of the third supporting layer, and the thickness of the second supporting layer is greater than the thickness of the first supporting layer.

Optionally, the shape of the first through holes is strip-shaped, the first through holes are formed along the bending direction of the first bending region, the first through holes are formed in the first bending region in a staggered array, the length of the first through holes is greater than or equal to 4mm, the width of the first through holes is 0.05-0.1 mm, the distance along the length direction of the first through holes is 0.1-0.5 mm, and the distance along the width direction of the first through holes is 0.05-0.25 mm.

Optionally, the second through holes are in a strip shape and are formed along the bending directions of the second bending region and the third bending region, the second through holes are formed in the second bending region and the third bending region in a staggered array, the length of the second through holes is 1-2 mm, the width of the second through holes is 0.05-0.1 mm, the distance along the length direction of the second through holes is 1-2 mm, and the distance along the width direction of the second through holes is 0.25-0.5 mm.

According to another aspect of the present utility model, there is provided a display device including:

a flexible display panel;

the support backboard is attached to one side, far away from the light emitting side, of the flexible display panel through the first bonding layer.

Optionally, a polyimide film layer is further attached between the flexible display surface and the support back plate.

Optionally, the support back plate is attached to the polyimide film layer by a second adhesive layer.

Optionally, a light shielding glue layer is arranged between the first bending area of the support backboard and the second bonding layer.

The beneficial effects of the utility model are as follows:

the support backboard is made of the multi-layer composite carbon fiber material, the weight of a product can be greatly reduced, and the bending performance of the support backboard can be improved, the stress generated during bending is reduced, and the problem of breakage during bending is avoided by arranging the first through holes in the first bending region and arranging the second through holes in the second bending region and the third bending region.

Drawings

The following describes the embodiments of the present utility model in further detail with reference to the drawings.

Fig. 1 shows a schematic partial structure of a display device of the present utility model.

Fig. 2 shows a schematic structural view of the support back plate of the present utility model.

Fig. 3 shows a schematic view of a partial enlarged structure of the support back plate of the present utility model.

Fig. 4 shows a cross-sectional view of the display device of the present utility model.

Detailed Description

In order to more clearly illustrate the present utility model, the present utility model will be further described with reference to preferred embodiments and the accompanying drawings. Like parts in the drawings are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and that this utility model is not limited to the details given herein.

The flexible display screen has the advantage of being bendable and foldable, the foldable display device becomes an innovative application field of the flexible display screen, the area of the display area of the flexible display screen can be adjusted randomly by a user according to the needs of the user, the flexible display screen is convenient to carry about, a better experience effect is provided for the user, and the flexible display screen is an important direction for developing the flexible display screen. However, because the rigidity of the flexible display screen is lower, the back of the flexible display screen is required to be supported by attaching a supporting backboard to improve the touch operation of a user, but the current common supporting backboard is a metal plate, so that the weight of a product is larger. Based on this, some embodiments of the present utility model provide a support back plate and a folding display device having the same.

As shown in fig. 1, some embodiments of the present disclosure provide a folding display device 100, where the folding display device 100 may be used as a product with a display function, such as a television, a mobile phone, a tablet computer, a notebook computer, etc., and the application of the folding display device 100 is not limited.

In some embodiments, the folding display device 100 includes an electroluminescent display or other type of display.

In some examples, the electroluminescent display comprises an organic electroluminescent display (Organic Lig ht Emitting Diode Display), a quantum dot electroluminescent display (Quantum Dot Light Emitting Diodes), or a micro light emitting diode display (Micro LED Display)

In some embodiments, the folding display device 100 may include a flexible display panel 2 and a support back plate 1 disposed at a side of the flexible display panel 2 opposite to a light emitting side, and a housing 3. The housing 3 includes a two-part housing that is relatively rotatably foldable, and by folding rotation of the two-part housing, the display device 100 can be made to have both a folded state and an unfolded state, and when the display device 100 is in the unfolded state, the flexible display panel 2 is exposed to the surface of the display device 100 so that a user can view an image of the flexible display panel 2. When the display device 100 is in the folded state, the casing 3 wraps the flexible display panel 2, and the flexible display panel 2 is located inside the casing 3, that is, the flexible display panel 2 is folded in a folded manner.

As shown in fig. 2, the embodiment of the present disclosure provides a support back plate 1 that can be applied to the display device 100 described above, where the support back plate 1 is attached to a surface of the flexible display panel 2 on a side away from the light emitting side, that is, the support back plate 1 is attached to a back surface of the flexible display panel 2, so that the support back plate 1 supports the flexible display panel 2. The support backboard 1 is made of a multi-layer composite carbon fiber material, the support backboard 1 is provided with a first bending area 101, a second bending area 102 and a third bending area 103, the second bending area 102 and the third bending area 103 are respectively located on two sides of the first bending area 101, a plurality of first through holes 104 which are arranged in an array mode are formed in the first bending area 101, and a plurality of second through holes 105 which are arranged in an array mode are respectively formed in the second bending area 102 and the third bending area 103.

Since the display device 100 has a folding function, the display panel 2 is a flexible display panel and can be bent according to application requirements. That is, the support back plate 1 may be curved with the bending of the flexible display panel.

When the display device 100 shown in fig. 1 is in a folded state, the folded portion of the flexible display panel 2 is substantially in a shape of a water drop, and since the support back plate 1 is attached to the flexible display panel 2, the folded portion of the support back plate 1 is also substantially in a shape of a water drop, wherein the first folding region 101 is located at the bottom of the water drop, and is a main folding region, the second folding region 102 and the third folding region 103 are located at two sides of the top of the water drop, and the folding direction of the first folding region 101 is opposite to the folding direction of the second folding region 102 and the third folding region 103, i.e. the folding direction of the first folding region 101 is an inward folding direction, and the folding directions of the second folding region 102 and the third folding region 103 are outward folding directions of the first folding region 101, the second folding region 102 and the third folding region 103 are parallel to each other.

The support backboard of the display device is made of a plurality of layers of composite carbon fiber materials, the weight of the support backboard 1 can be greatly reduced, the tensile strength of the support backboard 1 made of the carbon fiber materials is more than several times that of common steel, the elastic modulus is superior to that of the steel, and the support backboard has excellent creep resistance, corrosion resistance and shock resistance. And through setting up first through-hole 104 in first bending zone 101 to and set up second through-hole 105 in second bending zone 102 and third bending zone 103, can improve the bending performance of supporting backplate 1, reduce the stress that produces when buckling, avoid breaking the problem when buckling.

The multi-layer composite carbon fiber material is formed by laminating and bonding a plurality of layers of carbon fiber reinforced composite materials, each layer is formed by arranging a plurality of carbon fibers according to a certain direction, and then the carbon fibers are tightly connected into a whole by using resin or other bonding materials. The carbon fibers and the resin together form a fibrous composite, the engineering properties of which depend not only on the properties of the individual carbon fibers, but also on the properties of the resin and the density of the fibers, as well as on the direction of the fibers, i.e. the properties of the final carbon fiber material are a weighted average of the properties of the fibers and the properties of the filling resin.

In some examples, the support back 1 is made of a plurality of composite carbon fiber material layers including at least a first support layer, a second support layer, and a third support layer, each including a resin and carbon fibers impregnated in the resin.

In one example, the extending direction of the carbon fibers in the first support layer is the same as the extending direction of the carbon fibers in the third support layer, and the extending direction of the carbon fibers in the first support layer is perpendicular to the bending direction of the first bending region, and the extending direction of the carbon fibers in the second support layer is perpendicular to the extending direction of the carbon fibers in the first support layer. That is, the carbon fiber arrangement direction of the first, second and third support layers is 0/90/0.

In one example, the thickness of the first support layer is equal to the thickness of the third support layer, the thickness of the second support layer is greater than the thickness of the first support layer, specifically, the thicknesses of the first support layer and the third support layer are both 30um, the thickness of the second support layer is 100um, that is, a structure with a thickness of 30/100/30 is adopted, and the tensile modulus and the bending rigidity of the support back plate 1 of the structure are the highest.

In one example, as shown in fig. 3 and fig. 4, the first through hole 104 formed in the first bending region 101 has a long strip shape, that is, the first through hole 104 has a long strip-shaped racetrack shape, and the extending direction of the first through hole 104 is parallel to the bending direction of the first bending region 101. The first through holes 104 are arranged in the first bending region 101 in a staggered array, that is to say, a through hole 104 is Man Budi in the first bending region 101, the length A of the first through holes 104 is greater than or equal to 4mm, the width D is 0.05-0.1 mm, the distance B along the length direction of the first through holes 104 is 0.1-0.5 mm, and the distance C along the width direction of the first through holes is 0.05-0.25 mm.

The second through holes 105 formed in the second bending region 102 and the third bending region 103 are in a strip shape, that is, the second through holes 105 are in a strip-shaped racetrack shape, and the extending direction of the second through holes 105 is parallel to the bending direction of the second bending region 102. I.e. the first through holes 104 are parallel to the direction of extension of the second through holes 105. The second through holes 105 are arranged in the second bending region 102 and the third bending region 103 in a staggered array, that is to say, the second through holes 105 are fully distributed in the second bending region 102 and the third bending region 103, the length of the second through holes 105 is 1-2 mm, the width of the second through holes 105 is 0.05-0.1 mm, the distance along the length direction of the second through holes is 1-2 mm, and the distance along the width direction of the second through holes is 0.25-0.5 mm.

The length of the first through holes 104 is greater than the length of the second through holes 105 in the present embodiment, the width of the first through holes 104 is equal to the width of the second through holes 105, and the pitch of the adjacent first through holes 104 is smaller than the pitch of the adjacent second through holes 105, that is, the density of the first through holes 104 is greater than the density of the second through holes 105, so that the bending performance of the first bending region 101 is greater than the bending performance of the second bending region 102 and the third bending region 103.

In some examples, as shown in fig. 2, a first adhesive layer 3 may be included between the flexible display panel 2 and the support back 1, and the first adhesive layer 3 may be in contact with and connected to the support back 1, the flexible display panel 2, respectively, and the material of the first adhesive layer 3 may include a thermosetting resin or a photocurable resin. Illustratively, the material of the adhesive layer is a pressure-sensitive adhesive, such as an acrylate pressure-sensitive adhesive, to improve the connection stability with the support back plate 1.

In addition, the flexible display panel 2 and the support back plate 1 may be fixed together by other structures, such as fasteners, buckles, etc., and the fixing manner of the flexible display panel 2 and the support back plate 1 is not limited in the embodiments of the present disclosure, as long as the fixing between the two can be achieved.

In some examples, a polyimide film layer 3 is further attached between the flexible display panel 2 and the support back plate 1, that is, a polyimide film layer 4 is attached to the back surface of the flexible display panel 2 through a first adhesive layer 3, and the support back plate 1 is attached to the back surface of the polyimide film layer 4.

In one example, the support backplate 1 is attached to the polyimide film layer 4 by a second adhesive layer 5.

In one example, a light-shielding adhesive layer 6 is disposed between the first bending region 101 and the second adhesive layer 5 of the support back plate 1, and the light-shielding adhesive layer 6 may be a black light-shielding adhesive tape, so as to avoid reflection or light transmission in the first bending region 101. The thickness of the light-shielding glue layer 6 is equal to the thickness of the second adhesive layer 5 at the first bending region 101, and the thickness of the second adhesive layer 5 at the first bending region 101 is half of the thickness of the second adhesive layer 5 at other positions of the support back plate 1, that is, the thickness of the second adhesive layer 5 at the first bending region 101 is thinned by half, so that the light-shielding glue layer 6 is arranged at the position, that is, the second adhesive layer 5 covers the light-shielding glue layer 6.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It is further noted that in the description of the present utility model, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

It should be understood that the foregoing examples of the present utility model are provided merely for clearly illustrating the present utility model and are not intended to limit the embodiments of the present utility model, and that various other changes and modifications may be made therein by one skilled in the art without departing from the spirit and scope of the present utility model as defined by the appended claims.

Claims (10)

1. The utility model provides a support backplate, is attached in flexible display panel surface, its characterized in that, support backplate includes the compound carbon fiber material layer of multilayer, it is equipped with first bending zone to support the backplate, and is located respectively the second bending zone and the third bending zone of first bending zone both sides, a plurality of first through-holes have been seted up to first bending zone array, a plurality of second through-holes have been seted up to second bending zone and third bending zone array respectively.

2. The support back plate of claim 1 wherein the plurality of layers of composite carbon fiber material comprises a first support layer, a second support layer, and a third support layer in a stacked arrangement, each of the first support layer, the second support layer, and the third support layer comprising a resin and carbon fibers impregnated in the resin.

3. The support back plate of claim 2 wherein the first support layer and the third support layer carbon fibers have the same direction of extension, and the first support layer carbon fibers have a direction of extension perpendicular to the direction of bending of the first bending zone, and the second support layer carbon fibers have a direction of extension perpendicular to the direction of extension of the first support layer carbon fibers.

4. The support back of claim 2 wherein the thickness of the first support layer is equal to the thickness of the third support layer and the thickness of the second support layer is greater than the thickness of the first support layer.

5. The back support plate according to claim 1, wherein the first through holes are elongated and are formed along the bending direction of the first bending region, the first through holes are formed in the first bending region in a staggered array, the length of the first through holes is equal to or greater than 4mm, the width of the first through holes is 0.05-0.1 mm, the distance along the length direction of the first through holes is 0.1-0.5 mm, and the distance along the width direction of the first through holes is 0.05-0.25 mm.

6. The back support plate according to claim 1, wherein the second through holes are elongated and are formed along the bending directions of the second bending region and the third bending region, the second through holes are formed in the second bending region and the third bending region in a staggered array, the length of the second through holes is 1-2 mm, the width of the second through holes is 0.05-0.1 mm, the distance along the length direction of the second through holes is 1-2 mm, and the distance along the width direction of the second through holes is 0.25-0.5 mm.

7. A display device, comprising:

a flexible display panel;

the support back of any of claims 1 to 6, attached to a side of the flexible display panel remote from the light exit side by a first adhesive layer.

8. The display device according to claim 7, wherein a polyimide film layer is further attached between the flexible display surface and the support back plate.

9. The display device of claim 8, wherein the support back is attached to the polyimide film layer by a second adhesive layer.

10. The display device of claim 9, wherein a light shielding glue layer is disposed between the first bending region of the support back plate and the second adhesive layer.