WO2022227727A1 - Display screen module and electronic device - Google Patents

Abstract

A display screen module and an electronic device. The display screen module comprises a supporting plate and a display screen panel; the supporting plate (21) comprises a first plate surface (110) and a second plate surface (120), the first plate surface (110) and the second plate surface (120) are disposed back to back, and the first plate surface (110) is used for being attached to the display screen panel; the supporting plate (21) comprises a bending region, the display screen module is used for being bent in the bending region, and the second plate surface (120) is provided with a plurality of strip-shaped grooves (130) in the bending region; the length direction of the strip-shaped grooves (130) is parallel to the axis (L) of the display module when the display module is bent; and the depth of each strip-shaped groove (130) is smaller than or equal to the thickness of the supporting plate (21). In this way, the strip-shaped grooves (130) can provide enough deformation space for the material of the supporting plate (21) when the supporting plate (21) is bent, so that the internal stress of the bending region is reduced, and the bending performance of the bending region is improved; in addition, no strip-shaped groove (130) is formed in the first plate surface (110), so that the first plate surface (110) can be kept flat, die marks would not be produced after the display screen panel is attached to the first plate surface (110), and the display effect of the display screen module can be facilitated to be improved.

Description

A display module and electronic equipment

This application claims the priority of the Chinese patent application filed on April 29, 2021 with the application number 202110474258.5 and the invention titled "A Display Screen Module and Electronic Device", the entire contents of which are incorporated by reference in in this application.

technical field

The present application relates to the technical field of display screens, and in particular, to a display screen module and an electronic device.

Background technique

In recent years, the display technology of electronic devices has developed rapidly, especially the generation of bendable flexible screens has enabled the development of more product forms for electronic devices, among which, folding screen devices are an emerging product form. The display screen module of the folding screen device may include a three-layer stack structure, and the three-layer stack structure includes a support plate, a display screen panel and a cover plate in sequence from bottom to top. Wherein, the support plate may include at least one bending area, and the display screen module is used to realize bending and folding in the bending area.

At present, technicians will partially hollow out the bending area of the support plate to provide more deformation space for the support plate, so as to reduce the internal stress generated when the support plate is bent and improve the bending performance of the bending area. However, the hollow structure destroys the structural continuity of the support plate, resulting in a sharp decline in the anti-extrusion and impact resistance of the display module in the bending area, which makes the display module more difficult to be pressed by the user, squeezed by a hard object or dropped. Easy to sound damaged. In addition, the hollow structure also makes the surface of the support plate no longer flat, so that the display panel is likely to produce bonding marks (also called mold printing) at the hollow structure when the display panel is bonded, which affects the display performance of the display screen.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a display screen module and an electronic device, so as to improve the anti-extrusion and impact resistance performance of the display screen module in the bending area.

In a first aspect, an embodiment of the present application provides a display module, including: a support plate and a display panel; the support plate includes a first board surface and a second board surface, and the first board surface and the second board surface are arranged back-to-back, The first board surface is used to fit with the display panel; the support board includes a bending area, the display screen module is used for bending in the bending area, and the second board surface is provided with a plurality of strip-shaped grooves in the bending area; the strip-shaped The slot is a straight slot, and the length direction of the strip slot is parallel to the axis line when the display module is bent; the depth of the strip slot is less than or equal to the thickness of the support plate.

In the display screen module provided by the embodiment of the present application, the strip-shaped groove can provide sufficient deformation space for the support plate material when the support plate is bent, reduce the internal stress of the bending area, and improve the bending performance of the bending area; and, The depth of the strip groove can be less than the depth of the support plate without penetrating the support plate, so the strip groove will not destroy the structural continuity of the support plate, ensuring the anti-extrusion and impact resistance performance of the support plate; in addition, due to the strip groove It is only set on the second board surface, and the first board surface that is attached to the display panel is not provided with strip-shaped grooves, so the first board surface can maintain a flat surface, so that the display panel will not be attached to the first board surface. Die printing is generated, which is beneficial to improve the display effect of the display screen module.

In an implementation manner, the bending area includes a first bending area and a second bending area, the display screen module is used for bending to one side of the display panel in the first bending area, and the display screen module is used for bending at the second bending area. The bending area is bent to one side of the support plate; the second plate surface is provided with a plurality of strip-shaped grooves in both the first bending area and the second bending area, and the depth of the strip-shaped grooves is less than the thickness of the support plate, so that the support plate The bottom of the strip-shaped groove has a certain thickness, and forms a continuous structure with the area where the strip-shaped groove is not provided. In this way, the strip-shaped groove can provide more deformation space in the first bending area and the second bending area of the support plate, reduce the internal stress of the first bending area and the second bending area, and improve the first bending area. The bending performance of the bending area and the second bending area; and the strip groove does not penetrate the main body of the supporting plate in the first bending area and the second bending area, so that the supporting plate is in the first bending area and the second bending area. The structural continuity of the folded area is not damaged, which ensures the anti-extrusion and impact resistance of the display module in the first folded area and the second folded area.

In an implementation manner, the depth of the strip-shaped groove located in the first bending region is greater than the depth of the strip-shaped groove located in the second bending region. Considering that the bending radius of the first bending area is generally smaller than that of the second bending area, it is easier to generate large internal stress during bending, so the strip-shaped groove of the first bending area is The depth is deeper, thereby reducing the internal stress during bending to a greater extent and improving the bending performance of the first bending zone.

In an implementation manner, the depth of the strip groove located in the first bending area is greater than half the thickness of the support plate, and the depth of the strip groove located in the second bending area is equal to half the thickness of the support plate .

In an implementation manner, the bending area includes a first bending area and a second bending area, the display screen module is used for bending to one side of the display panel in the first bending area, and the display screen module is used for bending at the second bending area. The bending area is bent to one side of the support plate; the plurality of strip-shaped grooves includes a plurality of first strip-shaped grooves located in the first bending area and a plurality of second strip-shaped grooves located in the second bending area; the first strip-shaped grooves The depth of the groove is equal to the thickness of the support plate, so as to form a hollow structure in the first bending area; the depth of the second strip groove is less than the thickness of the support plate, so that the support plate has a certain thickness at the bottom of the second strip groove, which is the same as the thickness of the second strip groove. The region where the second strip-shaped groove is not provided forms a continuous structure. Considering that the bending radius of the first bending area is generally smaller than that of the second bending area, it is easier to generate large internal stress during bending, so the strip-shaped groove of the first bending area is Through the support plate, the internal stress during bending is reduced to a greater extent, and the bending performance of the first bending area is improved.

In an implementation manner, the shapes of the first bar-shaped slot and the second bar-shaped slot are different; the first bar-shaped slot has different widths in different position intervals along its length direction; the second bar-shaped slot has different widths in its length direction The width of each position is equal. In this way, the first strip-shaped groove can reduce the stress concentration when the inner bending area of the support plate is bent by changing the width, and the second strip-shaped groove can be set to a structure of equal width to reduce the difficulty of etching due to the low degree of bending in the outer bending area. .

In an implementation manner, the second strip-shaped groove penetrates through the second board surface along the direction of the axis line when the display module is bent.

In one implementation, the depth of the second strip groove is equal to half the thickness of the support plate.

In an implementation manner, the strip groove includes a first groove segment in its length direction, and a second groove segment located at both ends of the first groove segment; the first groove segment and the second groove segment are both equal-width structures; the second groove segment The width of the groove segment is greater than the width of the first groove segment; the connection between the first groove segment and the second groove segment is a rounded transition. In this way, the bar-shaped groove as a whole forms a dumbbell-shaped structure with wide ends at both ends and thin in the middle, and the second groove segment with a larger width can form a rounded transition with a larger radius at both ends of the bar-shaped groove, which is beneficial to reduce the stress during bending concentrated.

In an implementation manner, the center of the strip-shaped groove includes a transition area, and the sidewall of the strip-shaped groove is in a circular arc shape or a spline-shaped protrusion in the transition area, so that the width of the strip-shaped groove in the transition area is larger than that of the first groove The width of the segment.

In one implementation, the strip groove includes a transition section and an extension section located at both ends of the transition section; the width of the transition section gradually increases from the two ends to the center; the width of the extension section has a minimum value at one end close to the transition section, And it gradually increases in a fan shape along the direction away from the transition section; the connection between the transition section and the extension section is in a circular arc or spline transition. In this way, the width of the bar-shaped groove is larger at both ends, which has the strength and reduces the stress concentration at both ends of the bar-shaped groove during bending.

In an implementation manner, the two ends of the strip-shaped groove in the length direction are rounded transitions.

In a second aspect, an embodiment of the present application provides an electronic device, including: at least one display screen module provided by the first aspect and each implementation manner of the embodiment of the present application.

In an implementation manner, the display screen module of the electronic device includes a first display area, a second display area, and a display area located between the first display area and the second display area and connected to the first display area and the second display area The third display area; the third display area corresponds to the bending area of the support plate, so that the electronic device can be bent in the third display area to form a folding screen device shape.

Description of drawings

FIG. 1 is a schematic structural diagram of a folding screen device shown in an embodiment of the present application;

2 is a schematic structural diagram of a display screen module of a folding screen device provided by an embodiment of the present application;

3 is a schematic diagram of the support plate shown in the embodiment of the present application after unfolding;

4 is a schematic diagram of the shape of the support plate of the folding screen device shown in the embodiment of the present application when the body is folded;

5 is a schematic structural diagram of the support plate in the bending area shown in the embodiment of the present application;

6 is a schematic diagram of a support plate structure provided by the first embodiment of the present application;

FIG. 7 is a schematic diagram of the distribution mode of the strip grooves provided by the first embodiment of the present application;

FIG. 8 is a partial enlarged view of the distribution mode of the strip grooves in the inner bending area and the outer bending area provided by the first embodiment of the present application;

FIG. 9 is a cross-sectional view of the inner bending area and the outer bending area of the support plate shown in the first embodiment of the present application;

10 is a schematic diagram of a support plate structure provided by the second embodiment of the present application;

11 is a schematic diagram of the distribution of the first strip groove and the second strip groove provided by the second embodiment of the present application;

FIG. 12 is a cross-sectional view of the inner bending area and the outer bending area of the support plate shown in the second embodiment of the present application;

FIG. 13 is a schematic structural diagram of a strip groove provided by a third embodiment of the present application.

Detailed ways

In recent years, the display technology of electronic devices has developed rapidly, especially the generation of bendable flexible screens has enabled the development of more product forms for electronic devices, among which, folding screen devices are an emerging product form.

At present, according to the different folding directions of the display screen 11, the folding screen devices can be divided into inner folding screen devices and outer folding screen devices. FIG. 1 is a schematic structural diagram of a folding screen device shown in an embodiment of the present application. Wherein, structure a in FIG. 1 is a schematic structural diagram of an inner folding screen device, and structure b in FIG. 1 is a schematic structural diagram of an outer folding screen device. As shown in the structure a of FIG. 1 , the internal folding screen device means that the body 10 of the electronic device can be folded toward the display screen 11 , and the display screen 11 is hidden in the body 10 of the electronic device after the body 10 of the electronic device is folded. Inside, the display screen 11 is hidden in the folded state of the fuselage 10, and the effect presented in the unfolded state of the fuselage 10; as shown in the structure b in FIG. 1, the external folding screen device refers to the fuselage 10 of the electronic device It can be folded to the back side of the fuselage 10, and the display screen 11 surrounds the outside of the fuselage 10 of the electronic device after the fuselage 10 of the electronic device is folded, so that the display screen 11 surrounds the fuselage 10 when the fuselage 10 is folded. A surround screen is formed, and the effect of a normal straight screen is presented when the fuselage 10 is unfolded.

It is understandable that since the display screen of the folding screen device needs to be bent frequently, compared with the traditional electronic device, the display module of the folding screen device needs to be adapted to the use scenarios that are often bent, so as to avoid The display module maintains a good supporting form in different opening and closing states of the fuselage.

FIG. 2 is a schematic structural diagram of a display screen module of a folding screen device provided by an embodiment of the present application. As shown in FIG. 2 , the display screen module of the folding screen device may include a three-layer stack structure, and the three-layer stack structure includes a support plate 21 , a display screen panel 22 (panel) and a cover plate 23 (cover) sequentially from bottom to top. Among them: the support plate 21 is the bottom layer of the display screen module, and the material is generally metal, such as stainless steel, or other materials with certain plasticity and rigidity. The support plate 21 is used to support and Keep the display form. The display panel 22 is the middle layer of the display module, which can be pasted above the support plate 21 by sealing glue. The display panel 22 can be a flexible organic light-emitting diode (Organic Light-Emitting Diode, OLED) display panel, or other Flexible (that is, bendable) display panels, such as flexible Micro LED display panels, Mini LED display panels, etc., are not limited in the embodiments of the present application. The cover plate 23 is the uppermost layer of the display screen module, and can be attached to the top of the display screen panel 22 by sealing glue. Generally, in electronic devices with non-folding screens, the cover plate 23 is generally made of glass material, while in folding screen devices, the cover plate 23 is generally made of glass. Considering the bending performance, the cover plate 23 may be made of a transparent film material, such as a transparent polyimide film (CPI), or other materials, which are not limited in this embodiment of the present application.

FIG. 3 is a schematic diagram of the support plate shown in the embodiment of the present application after being unfolded. As shown in FIG. 3 , the support plate 21 may include at least one bending area 31 , and the area other than the bending area 31 is a flat area 32 . Wherein, the bending area 31 refers to an area that will bend when the body of the folding screen device is folded, and the flat area 32 refers to an area that does not bend when the body of the folding screen device is folded. Obviously, the number of the bending areas 31 is determined by the number of folds of the body of the folding screen device. If the body of the folding screen device is folded only once (ie, a single folding screen device), the support plate 21 may include one bending area 31. If If the body of the folding screen device is folded twice (ie, a double folding screen device), the support plate 21 may include two bending regions 31 . As an example, the support plate 21 shown in FIG. 3 includes a bending area 31 , which is distributed up and down, and the plane areas 32 are located on the left and right sides of the bending area 31 for realizing the left and right bending of the folding screen device body. The number of the bending regions 31 of the support plate 21 is not within the scope of the discussion of the embodiments of the present application, and therefore will not be described further below.

FIG. 4 is an example of an internal folding screen device, which shows a schematic diagram of the shape of the support plate of the folding screen device in the folded state of the body 10 . As shown in FIG. 4 , in the folded state of the fuselage 10 , the bending area may form an inner bending area 41 and an outer bending area 42 at different positions. In the embodiment of the present application, the inward bending area 41 refers to the area where the display module bends toward the cover plate 23 and the display panel 22 , and the outward bending area 42 refers to the area where the display module bends toward the support plate 21 . Whether the bending area can form the inner bending area 41 or the outer bending area 42 depends on the bending direction of the fuselage 10 and the structural design of the technician. Therefore, in different folding screen devices, the inner bending area 41 and the outer bending area 42 are The distribution may be different, which is not limited in this embodiment of the present application.

FIG. 5 is a schematic structural diagram of a support plate in a bending area according to an embodiment of the present application. As shown in FIG. 5, at present, technicians will partially hollow out the bending area of the support plate to provide more deformation space for the support plate 21, so as to reduce the internal stress generated when the support plate 21 is deformed and improve the bending bending properties of the area. However, the hollow structure 33 destroys the structural continuity of the support plate 21, resulting in a sharp decline in the anti-extrusion and impact resistance of the display module in the bending area, so that the display module is pressed or dropped by the user when pressed hard by a hard object. more prone to sound damage. Further as shown in FIG. 5 , due to the hollow structure 33 in the bending area, the surface of the support plate 21 is no longer flat, so that the display panel 22 is likely to produce bonding marks 34 (also called mold printing) at the hollow structure when the display panel 22 is bonded. Affects the display performance of the display.

In view of the problems existing in the display module of the current folding screen device, the embodiments of the present application provide a support plate structure, which can be used as the support plate of the display module, and can ensure the bending performance of the display module while ensuring the bending performance of the display module. , to improve the anti-extrusion and impact resistance of the bending area of the display module, and avoid mold printing.

The following is the first embodiment of the present application.

FIG. 6 is a schematic diagram of the support plate structure provided by the first embodiment of the present application. As shown in FIG. 6 , the support board 100 includes two upper and lower board surfaces. For the convenience of unified description, in the embodiment of the present application, the board surface of the support board 100 that is attached to the display panel is called the first board surface 110 , and the support board is referred to as the first board surface 110 . The board surface of 100 facing away from the first board surface 110 is called the second board surface 120 . The second plate surface 120 of the support plate 100 is provided with a plurality of strip-shaped grooves 130, and the strip-shaped grooves 130 can be obtained by etching the second plate surface to a certain depth. The plurality of strip-shaped grooves 130 may be specifically arranged in the area where the support plate 100 will be bent, for example, the inner bending area 41 (corresponding to the first bending area in the claims) and/or the outer bending area 42 (corresponding to the claims) the second bending zone in the book). The strip-shaped groove 130 is preferably a straight groove, that is, it extends linearly as a whole. The length direction of the strip groove 130 can be set according to the bending direction of the support plate 100 (that is, the bending direction of the display screen module), preferably the direction of the axis L when the support plate 100 is bent (that is, the bending direction of the display screen module). when the axis direction) is parallel. It should be noted here that, in the embodiment of the present application, the depth of the strip groove 130 is smaller than the thickness of the support plate 100 , that is, the strip groove 130 does not penetrate the support plate 100 . A certain thickness to maintain a continuous structure.

The implementation manner of the strip groove 130 will be further described below with reference to FIGS. 7-9 .

FIG. 7 is a schematic diagram of a distribution manner of the strip grooves 130 provided in the first embodiment of the present application.

As shown in FIG. 7 , the second plate surface 120 of the support plate 100 has a plurality of strip-shaped grooves 130 distributed in both the inner curved region 41 and the outer curved region 42 . The shape of the strip groove 130 in the inner bending area 41 and the strip groove 130 in the outer bending area 42 may be the same or different, and the size may be the same or different, which is not specifically limited in the embodiment of the present application.

As shown in FIG. 7 , in the inner bending area 41 and the outer bending area 42 , the strip-shaped grooves 130 are of the same width as a whole; G; the two ends of the strip groove 130 in the length direction can be transitioned by rounded corners 131, so that the side surface of the strip groove 130 is smooth as a whole, and no large stress concentration occurs when bending occurs.

As shown in FIG. 7 , in the inner curved area 41 and the outer curved area 42 , the plurality of strip-shaped grooves 130 are distributed in a rectangular array. The distribution of the plurality of strip-shaped grooves 130 in the bending area can be regarded as taking two adjacent strip-shaped grooves 130 as the basic array unit 140, and dividing the basic array unit 140 along the length direction of the strip-shaped groove 130 and the strip shape. A widthwise rectangular array of grooves 130 is obtained. For ease of description, the two strip-shaped grooves 130 in the basic array unit 140 are referred to as strip-shaped grooves 130a and 130b herein, and the strip-shaped grooves 130a and 130b may have the same or different sizes. The strip-shaped groove 130b is located on one side of the strip-shaped groove 130a along the width direction of the strip-shaped groove 130, and is staggered from the strip-shaped groove 130a along the length direction by a first distance W1, and the first distance W1 is about the length of the strip-shaped groove 130. half, so that one end of one of the bar-shaped grooves 130 is located in the central area of the other bar-shaped groove 130 . In this way, after the basic array units 140 are in a rectangular array, any two strip-shaped grooves 130 adjacent to each other in the width direction are staggered and distributed along the length direction.

FIG. 8 is a partial enlarged view of the distribution of the strip grooves 130 in the inner curved area 41 and the outer curved area 42 according to the first embodiment of the present application. The specific shapes of the strip-shaped grooves 130 in the inwardly curved region 41 and the outer-curved region 42 and the positional relationship between the adjacent strip-shaped grooves 130 will be explained in more detail below with reference to FIG. 8 .

As shown in FIG. 8 , the strip groove 130 may specifically include a first groove segment 132 along its length direction, and a second groove segment 133 located at both ends of the first groove segment 132 . Wherein, the first groove section 132 may be an equal-width structure with an overall width of C, the second groove section 133 may be an equal-width structure with a width A, and the width A of the second groove section 133 is greater than the width C of the first groove section 132 , so that the bar-shaped groove 130 as a whole forms a dumbbell-shaped structure with wide ends at both ends and thin in the middle. In this way, the second groove section 133 with a larger width can form a rounded transition with a larger radius at both ends of the strip groove 130, which is beneficial to reduce the stress concentration during bending.

As shown in FIG. 8 , the second groove section 133 has a length B along the length direction of the strip groove 130 , and the value of the length B can be determined by those skilled in the art, which is not limited in the embodiment of the present application. It should be noted here that since the function of the second groove section 133 is to form a rounded transition with a larger radius at both ends of the strip groove 130 , the second groove section 133 does not need to be set too long. For example, the length B of the second groove segment 133 is preferably greater than the width A of the second groove segment 133 , and not greater than one-tenth of the length G of the strip-shaped groove 130 and not less than one-twentieth of the length G of the strip-shaped groove 130 Wait.

It can be understood that, since the widths of the first groove segment 132 and the second groove segment 133 are different, the width of the side surface of the strip groove 130 will vary at the connection 134 of the first groove segment 132 and the second groove segment 133 . In order to prevent the strip groove 130 from generating stress concentration at the connection 134 of the first groove segment 132 and the second groove segment 133 , in this embodiment of the present application, an arc is preferably formed at the connection 134 of the first groove segment 132 and the second groove segment 133 . transition or spline transition.

As shown in FIG. 8, in the length direction of the strip grooves 130, two adjacent strip grooves 130 (as shown in FIG. 7, that is, two adjacent strip grooves 130a or two adjacent strip grooves 130b) are spaced apart a certain distance F. In the width direction of the bar-shaped groove 130, two adjacent bar-shaped grooves (as shown in FIG. 7, that is, the adjacent bar-shaped grooves 130a and 130b) are separated by a certain distance D, wherein the distance D may refer to is the distance between the first groove segments 132 of two adjacent strip grooves 130 .

As shown in FIG. 8 , any two strip-shaped grooves 130 adjacent to each other in the width direction are dislocated from each other along the length direction, and specifically satisfy the following positional relationship: for any two strip-shaped grooves 130 adjacent in the width direction, one strip One end of the shaped groove 130 is close to the center of the other strip-shaped groove 130 . As a preferred implementation manner, the overlapping length of two adjacent strip-shaped grooves 130 along the length direction is (G-F)/2.

As shown in FIG. 8 , the vicinity of the center of each bar-shaped groove d may include the ends of up to four other bar-shaped grooves (eg, bar-shaped grooves e, f, g, h), since the two adjacent bar-shaped grooves e There is a certain distance F between , f and g, h, so there will be a large unslotted area between strip groove d and strip groove e, f, g, h, this unslotted area The area will generate large stress during bending, which is not conducive to improving the overall bending performance of the support plate. In order to reduce this area, the center of each strip groove 130 further includes a transition area 135, and the side walls of the strip groove 130 are in the transition area 135 to both sides protrude in a circular arc or spline shape, so that the strip groove The width of 130 in the transition region 135 is greater than the width of the first groove segment 132 . The length of the transition zone 135 may preferably be the same as the distance F. In this way, as shown in FIG. 10, due to the addition of the transition area 135, the ungrooved area between the strip groove d and the strip grooves e, f, g, and h becomes smaller, and the strip groove d and the strip grooves e, The distance between f, g and h becomes smaller, so the stress in this area during bending can be reduced, and the bending performance of the whole support plate can be improved.

In one example, as shown in FIG. 8 , the strip grooves 130 may satisfy the following size constraints: the width A of the second groove segment 133 is less than or equal to 0.6 mm, preferably the width A is less than or equal to 0.3 mm; the width of the first groove segment 132 is C≤0.4 mm, preferably width C≤0.2mm; distance D≥0.05mm between two adjacent strip grooves, preferably distance D≥0.1mm; length G≥1.5mm of strip groove 130, preferably length G≥3mm; The distance between two adjacent strip grooves is F≥0.3mm, preferably the distance F≥0.6mm. The above size constraints can not only improve the bending performance of the support plate 100 , but also be easily implemented in the process, thereby improving the yield and reliability of process production.

FIG. 9 is a cross-sectional view of the inner curved area 41 and the outer curved area 42 of the support plate 100 according to the first embodiment of the present application.

As shown in FIG. 9 , in the inwardly curved region 41 , the etching depth H1 of the strip-shaped groove 130 is smaller than the thickness H3 of the support plate 100 , so the inwardly curved region 41 of the support plate 100 still has a certain amount at the position where the strip-shaped groove 130 is provided. Thickness I1, I1=H3-H1, that is to say, the strip groove 130 will not penetrate the support plate 100 in the inwardly curved region 41, which makes the first plate surface 110 of the supporting plate 100 still have structural continuity in the inwardly curved region 41, There will be no hollow out, so that the anti-extrusion and impact resistance of the inner bending area 41 are improved. In addition, since the first board surface 110 is not hollowed out in the inwardly curved region 41 , the first board surface 110 can maintain a flat surface, so that no stamping is generated after the display panel is attached to the first board surface 110 , which is beneficial to Improve the display effect of the display module.

As shown in FIG. 9 , the thickness I1 of the strip groove 130 in the inward bending area 41 is preferably 0.02 mm, so that the strip groove 130 can have a sufficient depth and provide sufficient deformation of the material of the supporting plate 100 when the supporting plate 100 is bent space, reduce the internal stress of the inner bending area 41, improve the bending performance of the inner bending area 41, so that the inner bending area 41 of the support plate 100 can cope with a large degree of bending without damage.

As shown in FIG. 9 , in the outward bending region 42 , the etching depth H2 of the strip groove 130 is preferably one half of the thickness H3 of the support plate 100 , that is, H2 = 1/2H3 , so that the strip groove 130 can be supported When the plate 100 is bent, it provides sufficient deformation space for the material of the supporting plate 100, reduces the internal stress of the outer bending area 42, improves the bending performance of the outer bending area 42, and ensures the anti-extrusion and impact resistance of the outer bending area 42. promote.

As can be seen from FIG. 4 , in the inner folding screen device, the bending radius of the inner bending area 41 of the support plate 100 is smaller than the bending radius of the outer bending area 42, which means that the bending degree of the supporting plate 100 in the inner bending area 41 is greater, The bending performance of the support plate 100 is required to be higher. Therefore, in the embodiment of the present application, the strip-shaped grooves 130 in the inward bending area 41 may be etched deeper, and the strip-shaped grooves 130 in the outer bending area 42 may be etched shallower. Some, that is, the depth of the strip grooves 130 in the inner curved region 41 is greater than that in the outer curved region 42 , for example, the depth of the strip grooves 130 in the inner curved region 41 is greater than half the thickness of the support plate 100 . In this way, due to the greater depth of the strip grooves 130 in the inwardly curved region 41, more deformation space is provided when the inwardly curved region 41 is bent, the internal stress of the inwardly curved region 41 is reduced to a greater extent, and the strength of the inwardly curved region 41 is improved. Bending performance; due to the larger bending radius of the outer bending area 42, the internal stress generated during bending is naturally smaller than that of the inner bending area 41, so the strip groove 130 can meet the bending performance with a shallower depth, and can maximize the bending performance. The anti-extrusion and anti-impact properties of the outer bending area 41 are guaranteed.

To sum up, in the technical solution provided in the first embodiment of the present application, the strip groove can provide sufficient deformation space for the support plate material when the support plate is bent, reduce the internal stress in the bending area, and improve the bending area of the bending area. In addition, since the depth of the strip groove is less than that of the support plate and does not penetrate the support plate, the strip groove will not destroy the structural continuity of the support plate and ensure the anti-extrusion and impact resistance of the support plate; in addition , since the strip-shaped groove is only provided on the second board surface, and the first board surface that is attached to the display panel is not provided with a strip-shaped groove, therefore, the first board surface can maintain a flat surface, so that the display panel and the first board surface can be kept flat. There will be no mold printing after the board surface is laminated, which is beneficial to improve the display effect of the display screen module.

The following is the second embodiment of the present application.

FIG. 10 is a schematic diagram of a support plate structure provided by the second embodiment of the present application. As shown in FIG. 10 , the support board 100 includes two upper and lower board surfaces. For the convenience of unified description, in the embodiment of the present application, the board surface of the support board 100 that is attached to the display panel is called the first board surface 110 , and the support board is referred to as the first board surface 110 . The board surface of 100 facing away from the first board surface 110 is called the second board surface 120 . The support plate 100 includes at least one bendable area, which can be divided into an inner bending area 41 (corresponding to the first bending area in the claims) and/or an outer bending area 42 (corresponding to the bending direction) according to the different bending directions. the second bending zone in the claims). Wherein, a plurality of first strip-shaped grooves 230 are provided in the inwardly curved region 41 of the support plate 100 , and the first strip-shaped grooves 230 are preferably straight grooves, that is, extend linearly as a whole. The length direction of the first strip groove 230 can be set according to the bending direction of the support plate 100 (that is, the bending direction of the display module), and is preferably the direction of the axis L of the support plate 100 when the support plate 100 is bent (that is, the bending direction of the display module). The axis direction at the time of bending) is parallel. It should be noted here that the first strip-shaped groove 230 is different from the strip-shaped groove in the first embodiment of the present application, and the first strip-shaped groove 230 extends from the first plate surface 110 of the support plate 100 to the second plate surface Step 120 , penetrate the support plate 100 so that the support plate 100 forms a hollow structure in the inwardly curved region 41 .

As shown in FIG. 10 , a plurality of second strip-shaped grooves 330 are provided in the outwardly curved region 42 of the support plate 100 . The second strip-shaped groove 330 is located on the second board surface 120 . The second strip-shaped groove 330 is preferably a straight groove, and its length direction can be set according to the bending direction of the support plate 100 (ie, the bending direction of the display module), preferably the same as the bending direction of the display module. The axis L direction when the support plate 100 is bent. It should be noted here that, unlike the first strip groove 230 , the depth of the second strip groove 330 is smaller than the thickness of the support plate 100 , that is, the second strip groove 330 does not penetrate the support plate 100 , so that the support plate 100 The bottom of the second strip groove 330 still has a certain thickness and maintains a continuous structure.

As shown in FIG. 10 , in an implementation manner, the second strip groove 330 extends from one end side of the support plate to the other end side along the axis L direction, so as to penetrate the second plate along the axis L direction face 120.

In the embodiment of the present application, the shapes of the first strip-shaped groove 230 and the second strip-shaped groove 330 are different; the specific performance is as follows: the first strip-shaped groove 230 has different widths at different positions in the length direction; the second strip-shaped groove 230 has different widths; The groove 330 has the same width at each position along its length. The implementation manner of the first strip-shaped groove 230 and the second strip-shaped groove 330 will be further described below with reference to FIGS. 11-12 .

FIG. 11 is a schematic diagram of the distribution of the first strip grooves 230 and the second strip grooves 330 provided by the second embodiment of the present application.

As shown in FIG. 11 , in the inward bending area 41 , the first strip-shaped groove 230 has a certain length G along the axis L direction of the bending of the support plate 100 ; the first strip-shaped groove 230 is at both ends of its length direction Rounded corners 131 may be used for transition, so that the side surface of the first strip groove 230 is smooth as a whole, and no large stress concentration occurs when bending occurs.

As shown in FIG. 11 , in the inwardly curved region 41 , the plurality of first strip-shaped grooves 230 are distributed in an array. The distribution of the plurality of first strip-shaped grooves 230 in the bending area can be regarded as taking two adjacent first strip-shaped grooves 230 as the basic array unit 240, and dividing the basic array unit 240 along the first strip-shaped groove 230 A rectangular array in the length direction and the width direction of the first strip groove 230 is obtained. For convenience of description, the two first strip-shaped grooves 230 in the basic array unit 240 are referred to as the first strip-shaped groove 230a and the first strip-shaped groove 230b, and the Dimensions can be the same or different. The first strip-shaped groove 230b is located on one side of the first strip-shaped groove 230a along the width direction of the first strip-shaped groove 230, and is staggered from the first strip-shaped groove 230a along the length direction by a first distance W1, the first distance W1 It is about half of the length of the first strip grooves 230 , so that one end of one of the first strip grooves 230 is located in the central area of the other first strip groove 230 . In this way, after the basic array units 240 are arranged in a rectangular array, any two first strip-shaped grooves 230 adjacent in the width direction are staggered and distributed along the length direction.

In an implementation manner, the specific shape of the first strip-shaped grooves 230 and the positional relationship between the adjacent first strip-shaped grooves 230 can be realized with reference to the strip-shaped grooves 130 in FIG. 8 , which will not be repeated here.

As shown in FIG. 11 , in the outward bending region 42 , the plurality of second strip-shaped grooves 330 are distributed in a linear array along the direction perpendicular to the axis L. As shown in FIG. The widths of the second strip-shaped grooves 330 are equal at each position along the length direction. The number of the second strip-shaped grooves 330 can be determined according to the length of the outer bending area 42 in the direction perpendicular to the axis L. The longer the length of the outer bending area 42 is, the greater the number of second strip-shaped grooves 330 The smaller the length of 42 is, the smaller the number of the second strip grooves 330 is.

FIG. 12 is a cross-sectional view of the inner curved area 41 and the outer curved area 42 of the support plate 100 according to the second embodiment of the present application.

As shown in FIG. 12 , in an implementation manner, in order to avoid the problem of stamping when the display panel is attached to the support plate 100 , each of the first strip-shaped grooves 230 is filled with a flexible medium 160 (in FIG. 12 only the The flexible medium 160 is shown in some of the first strip grooves 230, and the remaining first strip grooves 230 without the flexible medium 160 are also filled with the flexible medium 160). The areas are in the same plane, so that no stenciling occurs when the display panels are attached.

In one implementation, the flexible medium 160 may be, for example, liquid silicone rubber (LSR). The liquid silica gel can be injected into the first strip groove 230 through a liquid silica gel injection molding system (LIMS), so that the liquid silica gel and the main body of the support plate 100 form an integral structure.

The injection molding process of the liquid silica gel involved in the embodiments of the present application is exemplified below. Generally speaking, liquid silica gel is a two-component glue, including glue A and glue B, glue A and glue B are liquid at room temperature, and can be quickly cured when heated to a certain temperature after mixing. Before injection molding, the mixing process is performed first, that is, the A glue and the B glue are mixed; then, the mixed liquid silica gel is injected into the first strip groove 230, preferably filling the entire first strip groove 230; finally; , heat and pressurize the injected liquid silica gel to solidify, the solidified liquid silica gel will be integrated with the main structure of the support plate 100 , and the liquid silica gel and the board surface of the support plate 100 are located in the same plane.

As shown in FIG. 12 , in an implementation manner, the second strip-shaped groove 330 is a trapezoidal groove, the width W2 of the second strip-shaped groove 330 gradually decreases from the top of the groove to the bottom of the groove, and the width of the second strip-shaped groove 330 W2≤4mm, preferably the width W2≤2mm. The etching depth H2 of the second strip-shaped groove 330 is preferably half of the thickness H3 of the support plate 100 , that is, H2 = 1/2H3 , so that the second strip-shaped groove 330 can provide sufficient material for the support plate 100 when the support plate 100 is bent. The deformation space is reduced, the internal stress of the outer bending area 42 is reduced, the bending performance of the outer bending area 42 is improved, and the anti-extrusion and impact resistance performance of the outer bending area 42 can be improved.

To sum up, in the technical solution provided in the second embodiment of the present application, the support plate is provided with a first strip-shaped groove and a second strip-shaped groove, which can provide sufficient deformation space for the support plate material when the support plate is bent, reducing the The internal stress in the bending area improves the bending performance of the bending area; and, in the outer bending area, since the depth of the second strip groove is less than that of the support plate and does not penetrate the support plate, the second strip groove will not be damaged. The structural continuity of the outer bending area of the support plate ensures the anti-extrusion and impact resistance performance of the outer bending area of the support plate.

The following is a third embodiment of the present application.

The present application provides a bar-shaped groove with a dumbbell-shaped structure in the first embodiment. It can be understood that, in addition to the dumbbell-shaped structure, the bar-shaped groove in each embodiment of the present application may also have other shapes. The third embodiment of the present application provides a bar-shaped groove of another shape, and the bar-shaped groove may be the bar-shaped groove 130 in the first embodiment of the present application or the first bar-shaped groove 230 in the second embodiment of the present application , the array manner can also be realized by referring to the array manner of the strip-shaped grooves 130 in the first embodiment of the present application or the first strip-shaped grooves 230 in the second embodiment of the present application.

FIG. 13 is a schematic structural diagram of a strip groove provided by a third embodiment of the present application. As shown in FIG. 13 , the strip groove 430 includes a transition section 431 and extension sections 432 located at both ends of the transition section 431 and extending away from the transition section 431 . In the length direction of the strip groove 430 , the width of the transition section 431 has a minimum value k at both ends, and gradually increases toward the center of the transition section 431 , and the center of the transition section 431 is arc-shaped or spline-shaped transition so that the strip groove 430 has smooth sidewalls at the transition section 431 . The width of the extension section 432 has a minimum value k at one end close to the transition section 431 , and gradually increases in a fan shape along the direction away from the transition section 431 . The connection between the transition section 431 and the extension section 432 is in a circular arc or spline transition.

In an example, as shown in FIG. 13 , the radius R of the arc-shaped transition at both ends of the extended section 432 is less than or equal to 0.6 mm, preferably the radius R is less than or equal to 0.3 mm; when the extended section 432 is enlarged in a fan shape, the two side walls of the strip groove 430 The included angle β≤20°, preferably the included angle β≤10°; the width K≤0.6mm of the center of the transition section 431, preferably the width K≤0.3mm; the length G≥1.5mm of the strip groove 430, preferably the length G ≥3mm; the distance F≤1.2mm between two adjacent strip grooves 430, preferably the distance F≤0.6mm. The above size constraints can not only improve the bending performance of the support plate, but also be easily implemented in the process, thereby improving the yield and reliability of process production.

The strip grooves provided in the embodiments of the present application are beneficial to reduce the stress concentration during the bending of the support plate, reduce the stress during bending, and improve the overall bending performance of the support plate.

The embodiment of the present application provides an electronic device, and the electronic device may be, for example, a folding screen device, a scroll screen device, or any electronic device with a bendable display screen. The electronic device may include one or a display screen module, wherein at least one display screen module includes the support plate provided by the embodiments of the present application. For example, the electronic device may be an inner folding screen device, and the inner folding screen device may include an inner screen and an outer screen, wherein the inner screen refers to the display module hidden in the folded state of the body, and the outer screen refers to It is a display screen module that is exposed in any state of the fuselage, and the inner screen includes the support plate provided by the embodiments of the present application, so as to have good bending performance, and good anti-extrusion and impact resistance performance.

In an implementation manner, the display screen module including the support plate provided by the embodiment of the present application may include a first display area, a second display area, and a first display area and a second display area located between the first display area and the second display area A third display area connecting the display area and the second display area; wherein, the third display area corresponds to the bending area of the support plate, so that the electronic device can be bent in the third display area to form a folding screen device shape.

It is easy to understand that those skilled in the art can combine, split, and reorganize the embodiments of the present application on the basis of the several embodiments provided in the present application to obtain other embodiments, and these embodiments do not exceed the scope of the present application. protected range.

The above specific embodiments further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention, and are not intended to limit the protection scope of the present invention. On the basis of the technical solutions of the present invention, any modifications, equivalent replacements, improvements, etc. made shall be included within the protection scope of the present invention.

Claims (14)

1. A display screen module, comprising: a support plate and a display screen panel;

   the support plate includes a first board surface and a second board surface, the first board surface and the second board surface are arranged back to back, and the first board surface is used to fit with the display screen panel;

   The support plate includes a bending area, the display screen module is used for bending in the bending area, and the second plate surface is provided with a plurality of strip-shaped grooves in the bending area;

   The length direction of the strip groove is parallel to the axis line of the display module when it is bent;

   The depth of the strip groove is less than or equal to the thickness of the support plate.
2. The display screen module according to claim 1, wherein,

   The bending area includes a first bending area and a second bending area, the display screen module is used for bending to one side of the display panel in the first bending area, and the display screen module is used for Bending to one side of the support plate in the second bending area;

   The second plate surface is provided with a plurality of the strip-shaped grooves in both the first bending area and the second bending area, and the depth of the strip-shaped grooves is smaller than the thickness of the support plate, so that the The support plate has a certain thickness at the bottom of the strip groove, and forms a continuous structure with the area where the strip groove is not provided.
3. The display screen module according to claim 2, wherein,

   The depth of the strip-shaped groove located in the first bending region is greater than the depth of the strip-shaped groove located in the second bending region.
4. The display screen module according to claim 2, wherein,

   The depth of the strip-shaped groove located in the first bending area is greater than half of the thickness of the support plate, and the depth of the strip-shaped groove located in the second bending area is equal to the thickness of the support plate one-half of .
5. The display screen module according to claim 1, wherein,

   The bending area includes a first bending area and a second bending area, the display screen module is used for bending to one side of the display panel in the first bending area, and the display screen module is used for Bending to one side of the support plate in the second bending area;

   The plurality of strip-shaped grooves include a plurality of first strip-shaped grooves located in the first bending area and a plurality of second strip-shaped grooves located in the second bending area; The depth is equal to the thickness of the support plate, so as to form a hollow structure in the first bending area; the depth of the second strip groove is less than the thickness of the support plate, so that the support plate is in the second The bottom of the strip-shaped groove has a certain thickness, and forms a continuous structure with the region where the second strip-shaped groove is not provided.
6. The display screen module according to claim 1, other proofs are,

   The shape of the first strip groove is different from that of the second strip groove;

   The first strip-shaped groove has different widths at different position intervals along its length direction;

   The widths of the second strip-shaped grooves are equal at each position along the length direction thereof.
7. The display screen module according to claim 5 or 6, wherein,

   The second strip-shaped groove penetrates through the second board surface along the axis line direction of the display module when it is bent.
8. The display screen module according to claim 7, wherein,

   The depth of the second strip groove is equal to half of the thickness of the support plate.
9. The display screen module according to any one of claims 1-4, wherein,

   The strip-shaped groove includes a first groove segment in its length direction, and a second groove segment located at both ends of the first groove segment;

   The first groove section and the second groove section are of equal width structure;

   The width of the second groove segment is greater than the width of the first groove segment;

   The connection between the first slot segment and the second slot segment is a rounded transition.
10. The display screen module according to claim 9, wherein,

    The center of the strip groove includes a transition area, and the side wall of the strip groove is convex in a circular arc or spline shape in the transition area, so that the width of the strip groove in the transition area is larger than that in the transition area. the width of the first slot segment.
11. The display screen module according to any one of claims 1-4, wherein,

    The strip groove includes a transition section and extension sections located at both ends of the transition section;

    The width of the transition section gradually increases from both ends to the center;

    The width of the extension section has a minimum value at one end close to the transition section, and gradually increases in a fan shape along the direction away from the transition section;

    The connection between the transition section and the extension section is in a circular arc or spline transition.
12. The display screen module according to any one of claims 1-11, wherein,

    Both ends of the strip groove in the length direction are rounded transitions.
13. An electronic device, comprising: at least one display screen module according to any one of claims 1-12.
14. The electronic device according to claim 13, wherein the display screen module comprises a first display area, a second display area, and a second display area located between the first display area and the second display area. a third display area connecting the first display area and the second display area; the third display area corresponds to the bending area of the support plate, so that the electronic device is used for the third display area area bends.

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