CN113257123A - Display screen module and electronic equipment - Google Patents
Display screen module and electronic equipment Download PDFInfo
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- CN113257123A CN113257123A CN202110474258.5A CN202110474258A CN113257123A CN 113257123 A CN113257123 A CN 113257123A CN 202110474258 A CN202110474258 A CN 202110474258A CN 113257123 A CN113257123 A CN 113257123A
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- shaped groove
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
Abstract
The embodiment of the application provides a display screen module and electronic equipment. The display screen module comprises a support plate and a display screen panel; the supporting plate comprises a first plate surface and a second plate surface, the first plate surface and the second plate surface are arranged back to back, and the first plate surface is used for being attached to the display screen panel; the support plate comprises 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-shaped groove is parallel to the axis line of the display module when the display module is bent; the depth of the strip-shaped groove is less than or equal to the thickness of the supporting plate. Therefore, the strip-shaped grooves can provide enough deformation space for the material of the support plate when the support plate is bent, reduce the internal stress of the bending area and improve the bending performance of the bending area; in addition, because do not set up the bar groove with first face, consequently first face can keep smooth surface for can not produce the moulding after display screen panel and the laminating of first face, be favorable to improving the display effect of display screen module.
Description
Technical Field
The application relates to the technical field of display screens, in particular to a display screen module and electronic equipment.
Background
In recent years, the display screen technology of electronic devices has been developed rapidly, and particularly, the generation of flexible screens enables the electronic devices to develop more product forms, wherein a folding screen device is a product form emerging at present. The display screen module of the folding screen device may include a three-layer stack structure including a support plate, a display screen panel, and a cover plate in sequence from bottom to top. The support plate may include at least one bending region, and the display screen module is configured to implement bending and folding in the bending region.
At present, technicians can perform partial hollow-out treatment on the bending area of the support plate, and more deformation spaces are provided for the support plate, so that the internal stress generated when the support plate is bent is reduced, and the bending performance of the bending area is improved. However, the hollow structure destroys the structural continuity of the supporting plate, so that the anti-extrusion and impact resistance of the display screen module in the bending area are reduced sharply, and the display screen module is easier to sound and damage when being pressed by a user with force, extruded by a hard object or dropped. In addition, the hollow structure also enables the surface of the supporting plate to be not smooth any more, so that the display screen panel is easy to generate a bonding trace (also called a die mark) at the hollow structure when being bonded, and the display performance of the display screen is influenced.
Disclosure of Invention
The embodiment of the application provides a display screen module and electronic equipment, so that the extrusion resistance and the impact resistance of the display screen module in a bending area are improved.
In a first aspect, an embodiment of the present application provides a display screen module, including: a support plate and a display screen panel; the supporting plate comprises a first plate surface and a second plate surface, the first plate surface and the second plate surface are arranged back to back, and the first plate surface is used for being attached to the display screen panel; the support plate comprises 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 strip-shaped groove is a straight groove, and the length direction of the strip-shaped groove is parallel to the axis line of the display module when the display module is bent; the depth of the strip-shaped groove is less than or equal to the thickness of the supporting plate.
In the display screen module provided by the embodiment of the application, the strip-shaped grooves can provide enough deformation space for the material of the support plate when the support plate is bent, so that the internal stress of the bending area is reduced, and the bending performance of the bending area is improved; moreover, the depth of the strip-shaped groove can be smaller than that of the support plate without penetrating through the support plate, so that the structural continuity of the support plate is not damaged by the strip-shaped groove, and the extrusion resistance and the impact resistance of the support plate are ensured; in addition, because the bar groove only sets up at the second face, the first face of laminating with display screen panel does not set up the bar groove, consequently first face can keep smooth surface for display screen panel can not produce the die mark after laminating with first face, is favorable to improving the display effect of display screen module.
In one implementation manner, the bending region includes a first bending region and a second bending region, the display screen module is used for bending towards one side of the display screen panel in the first bending region, and the display screen module is used for bending towards one side of the support plate in the second bending region; the second face all is provided with a plurality of bar grooves in first bending zone and second bending zone, and the degree of depth in bar groove is less than the thickness of backup pad to make the backup pad have certain thickness in the bottom in bar groove, form continuous structure with the region that does not set up the bar groove. Therefore, the strip-shaped groove can provide more deformation spaces in the first bending area and the second bending area of the support plate, so that the internal stress of the first bending area and the second bending area is reduced, and the bending performance of the first bending area and the second bending area is improved; and the bar groove does not run through the support plate main body in the first bending area and the second bending area, so that the structural continuity of the support plate in the first bending area and the second bending area is not damaged, and the anti-extrusion and anti-impact performance of the display screen module in the first bending area and the second bending area is ensured.
In one implementation, the depth of the strip-shaped groove located in the first bending area is greater than the depth of the strip-shaped groove located in the second bending area. According to the embodiment of the application, the bending radius of the first bending area is generally smaller than that of the second bending area, and larger internal stress is generated more easily during bending, so that the depth of the strip-shaped groove of the first bending area is deeper, the internal stress during bending is reduced to a greater extent, and the bending performance of the first bending area is improved.
In one implementation, the depth of the strip-shaped groove in the first bending area is greater than one half of the thickness of the supporting plate, and the depth of the strip-shaped groove in the second bending area is equal to one half of the thickness of the supporting plate.
In one implementation manner, the bending region includes a first bending region and a second bending region, the display screen module is used for bending towards one side of the display screen panel in the first bending region, and the display screen module is used for bending towards one side of the support plate in the second bending region; the plurality of strip-shaped grooves comprise a plurality of first strip-shaped grooves positioned in the first bending area and a plurality of second strip-shaped grooves positioned in the second bending area; the depth of the first strip-shaped groove is equal to the thickness of the supporting plate so as to form a hollow structure in the first bending area; the depth of the second strip-shaped groove is smaller than the thickness of the support plate, so that the support plate has a certain thickness at the bottom of the second strip-shaped groove and forms a continuous structure with an area where the second strip-shaped groove is not arranged. The bending radius of the first bending area is usually smaller than that of the second bending area, and larger internal stress is generated more easily during bending, so that the strip-shaped groove of the first bending area penetrates 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 one implementation, the first strip-shaped groove and the second strip-shaped groove are different in shape; the first strip-shaped groove has different widths in different position intervals in the length direction; the second strip-shaped groove has the same width at each position in the length direction. Like this, first bar groove can reduce the stress concentration when the backup pad inturn district buckles through the width change, and the second bar groove can set to the constant width structure in order to reduce the etching degree of difficulty because the degree of buckling in the excurvation district is lower.
In one implementation, the second strip-shaped groove penetrates through the second board surface along the axial lead direction when the display module is bent.
In one implementation, the depth of the second strip-shaped groove is equal to one half of the thickness of the support plate.
In one implementation, the strip-shaped groove comprises a first groove section and second groove sections positioned at two ends of the first groove section in the length direction of the strip-shaped groove; the first groove section and the second groove section are both of equal-width structures; the width of the second groove section is larger than that of the first groove section; the junction of the first groove section and the second groove section is in fillet transition. Like this, the thin dumbbell type structure in the wide centre in both ends is formed on the whole in bar groove, and the second groove section that the width is bigger can form the fillet transition of bigger radius at bar groove both ends, is favorable to reducing the stress concentration when buckling.
In one implementation, the center of the strip-shaped groove comprises a transition region, and the side wall of the strip-shaped groove protrudes in the transition region in a circular arc shape or a spline shape, so that the width of the strip-shaped groove in the transition region is greater than the width of the first groove section.
In one implementation, the strip-shaped groove comprises a transition section and extension sections positioned at two ends of the transition section; the width of the transition section is gradually increased 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 gradually increases in a fan shape along the direction far away from the transition section; the junction of the transition section and the extension section is in arc transition or spline transition. Like this, the bar groove is bigger at its both ends width, has the dynamics and reduces the stress concentration of bar groove both ends when buckling.
In one implementation, the strip-shaped groove is in rounded transition at both ends in the length direction.
In a second aspect, an embodiment of the present application provides an electronic device, including: at least one display screen module provided in the first aspect and each implementation manner of the embodiments of the present application.
In one implementation, a display screen module of an electronic device includes a first display area, a second display area, and a third 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 corresponds to the bending area of the support plate, so that the electronic equipment can be bent in the third display area to form a folding screen equipment shape.
Drawings
Fig. 1 is a schematic structural diagram of a folding screen device according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a display screen module of a folding screen device provided in an embodiment of the present application;
FIG. 3 is a schematic view of the support panel shown in an embodiment of the present application after deployment;
fig. 4 is a schematic view of a support plate of the folding screen apparatus in a folded state of the body according to the embodiment of the present application;
FIG. 5 is a schematic structural view of a support plate in a bending region according to an embodiment of the present application;
FIG. 6 is a schematic view of a support plate structure provided in a first embodiment of the present application;
FIG. 7 is a schematic view of the distribution of the stripe grooves according to the first embodiment of the present application;
FIG. 8 is an enlarged view of a portion of the strip grooves in the inner and outer curved regions according to the first embodiment of the present application;
FIG. 9 is a cross-sectional view of the inturned and inturned regions of the support plate shown in the first embodiment of the present application;
FIG. 10 is a schematic view of a support plate structure provided in a second embodiment of the present application;
FIG. 11 is a schematic view of the distribution of first and second elongated grooves provided in a second embodiment of the present application;
FIG. 12 is a cross-sectional view of the inturned and inturned regions of a support plate shown in a second embodiment of the present application;
fig. 13 is a schematic structural diagram of a stripe groove according to a third embodiment of the present application.
Detailed Description
In recent years, the display screen technology of electronic devices has been developed rapidly, and particularly, the generation of flexible screens enables the electronic devices to develop more product forms, wherein a folding screen device is a product form emerging at present.
Currently, the folding screen device may be divided into an inner folding screen device and an outer folding screen device according to the difference of the folding direction of the display screen 11. Fig. 1 is a schematic structural diagram of a folding screen device according to an embodiment of the present application. Wherein, the structure a in fig. 1 is a schematic structural view of the inner folding screen device, and the structure b in fig. 1 is a schematic structural view of the outer folding screen device. As shown in a structure a of fig. 1, the internal folding screen device means that a main body 10 of the electronic device can be folded toward a display screen 11, and the display screen 11 is hidden inside the main body 10 of the electronic device after the main body 10 of the electronic device is folded, thereby forming an effect that the display screen 11 is hidden in a folded state of the main body 10 and appears in an unfolded state of the main body 10; as shown in a structure b in fig. 1, the external folding screen device means that the main body 10 of the electronic device can be folded toward the back side of the main body 10, and the display screen 11 surrounds the outside of the main body 10 of the electronic device after the main body 10 of the electronic device is folded, so that the display screen 11 surrounds the main body 10 in the folded state of the main body 10 to form a surrounding screen, and the main body 10 presents a normal straight screen effect in the unfolded state.
It can be understood that, because the display screen of the folding screen device needs to be bent frequently, compared with the electronic device in the conventional form, the display screen module of the folding screen device needs to be designed in some adaptability according to the use scene of the folding screen device, so that the display screen module can be kept in a good support form in different opening and closing states of the body.
Fig. 2 is a schematic structural diagram of a display screen module of a folding screen device according to an embodiment of the present application. As shown in fig. 2, the display panel module of the folding screen device may include a three-layer stack structure including a support plate 21, a display screen panel 22(panel), and a cover plate 23(cover) in this order from the bottom up. Wherein: the support plate 21 is the lowest layer of the display module, and is generally made of metal, such as stainless steel, or other materials with certain plasticity and rigidity, and the support plate 21 is used for supporting and maintaining the shape of the display in various opening and closing states of the body. The display screen panel 22 is an intermediate layer of a display screen module and can be attached above the supporting plate 21 by a sealing compound, the display screen panel 22 can be a flexible Organic Light-Emitting Diode (OLED) display screen panel 22, or can be other flexible (i.e., bendable) display screen panels 22, such as a flexible Micro LED display screen panel 22, a Mini LED display screen panel 22, and the like, which is not limited in the embodiments of the present disclosure. The cover plate 23 is the uppermost layer of the display panel module, and can be attached above the display panel 22 by glue, generally, in the electronic device of the non-folding screen, the cover plate 23 is made of glass, and in the electronic device of the folding screen, the cover plate 23 can be made of a transparent film material, such as a transparent polyimide film (CPI), or other materials, which is not limited in this embodiment.
Fig. 3 is a schematic view of the support plate shown in the embodiment of the present application after being unfolded. As shown in fig. 3, the supporting plate 21 may include at least one bending region 31, and the region outside the bending region 31 is a planar region 32. Here, the bending region 31 refers to a region where bending occurs when the body of the folding screen apparatus is folded, and the flat region 32 refers to a region where bending does not occur when the body of the folding screen apparatus is folded. It is obvious that the number of bending zones 31 is determined by the number of folds of the body of the folding screen device, and that the display screen module may comprise one bending zone 31 if the body of the folding screen device is folded only once (i.e. a single folding screen device), and two bending zones 31 if the body of the folding screen device is folded twice (i.e. a double folding screen device). As an example, the display panel module shown in fig. 3 includes a bending region 31 distributed up and down, and flat regions 32 located at the left and right sides of the bending region 31 for implementing left and right bending of the body of the folding screen apparatus. The number of bending regions 31 of the display panel module is not within the scope of the discussion of the embodiments of the present application, and therefore will not be described in greater detail below.
Fig. 4 is a schematic view of a support plate of the folding screen device in a folded state of the body 10, taking the folding screen device as an example. As shown in fig. 4, in the folded state of the fuselage 10, the bending zones may form an inflected zone 41 and an inflected zone 42 at different positions. In the embodiment of the present application, the in-bent region 41 refers to a region where the display panel module is bent toward the cover plate 23 and the display panel 22 side, and the out-bent region 42 refers to a region where the display panel module is bent toward the support plate 21 side. The bending region can specifically form the inward bending region 41 or the outward bending region 42, and the distribution of the inward bending region 41 and the outward bending region 42 may be different in different folding screen apparatuses, depending on the bending direction of the fuselage 10 and the structural design of the technician, which is not limited in the embodiment of the present application.
Fig. 5 is a schematic structural diagram of a support plate in a bending region according to an embodiment of the present application. As shown in fig. 5, at present, a technician may perform partial hollow-out processing on the bending region 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 deforms, and improve the bending performance of the bending region. However, the hollow structures 33 destroy the structural continuity of the supporting plate 21, which results in a sharp decrease in the anti-extrusion and impact resistance of the display screen module in the bending region, so that the display screen module is more prone to sound damage when being pressed by a user, squeezed by a hard object or dropped. As further shown in fig. 5, since the bending region has the hollow-out structure 33, the surface of the supporting plate 21 is not flat, so that the display screen panel 22 is easy to generate a fitting trace 34 (also called a mold mark) at the hollow-out structure during fitting, which affects the display performance of the display screen.
The embodiment of the application provides a supporting plate structure which can be used as a supporting plate of a display screen module and can improve the extrusion resistance and impact resistance of a bending area of the display screen module while ensuring the bending performance of the display screen module and avoid the generation of a die mark.
The following is a first embodiment of the present application.
Fig. 6 is a schematic view of a support plate structure provided in the first embodiment of the present application. As shown in fig. 6, the support plate 100 includes two upper and lower plate surfaces, and for convenience of description, in the embodiment of the present application, a plate surface of the support plate 100 attached to the display screen panel is referred to as a first plate surface 110, and a plate surface of the support plate 100 opposite to the first plate surface 110 is referred to as a second plate surface 120. The second plate surface 120 of the support plate 100 is provided with a plurality of stripe grooves 130, and the stripe grooves 130 can be formed by etching a certain depth on the second plate surface. The plurality of grooves 130 may be disposed in a region where the support plate 100 is bent, such as the inward bending region 41 (corresponding to the first bending region in the claims) and/or the outward bending region 42 (corresponding to the second bending region in the claims). The strip-shaped groove 130 is preferably a straight groove, i.e. extends in a straight line as a whole. The length direction of the bar-shaped groove 130 may be set according to the bending direction of the support plate 100 (i.e., the bending direction of the display panel module), and is preferably parallel to the direction of the axial line L when the support plate 100 is bent (i.e., the axial direction when the display panel module is bent). It should be noted that in the embodiment of the present application, the depth of the strip-shaped groove 130 is smaller than the thickness of the support plate 100, that is, the strip-shaped groove 130 does not penetrate through the support plate 100, so that the support plate 100 still has a certain thickness at the bottom of the strip-shaped groove 130, and a continuous structure is maintained.
The implementation of the strip-shaped slot 130 is further described below in conjunction with fig. 7-9.
Fig. 7 is a schematic view of a distribution of the stripe groove 130 according to the first embodiment of the present application.
As shown in fig. 7, the second plate surface 120 of the support plate 100 is distributed with a plurality of slits 130 at both the inflected region 41 and the inflected region 42. The shape of the strip-shaped groove 130 located in the inward bending region 41 and the shape of the strip-shaped groove 130 located in the outward bending region 42 may be the same or different, and the size may be the same or different.
As shown in fig. 7, in the inner bending region 41 and the outer bending region 42, the strip-shaped groove 130 has an equal width structure as a whole; the strip-shaped groove 130 has a certain length G along the direction of the axis L of the support plate 100; the two ends of the strip-shaped groove 130 in the length direction can be transited by adopting the round corners 131, so that the side surface of the strip-shaped groove 130 is smooth as a whole, and large stress concentration cannot occur when the strip-shaped groove is bent.
As shown in fig. 7, in the inner bending area 41 and the outer bending area 42, a plurality of stripe-shaped grooves 130 are distributed in a rectangular array. The distribution of the plurality of stripe grooves 130 in the bending region can be regarded as two adjacent stripe grooves 130 as the basic array unit 140, and the basic array unit 140 is obtained by rectangular array along the length direction of the stripe grooves 130 and the width direction of the stripe grooves 130. For convenience of description, the two stripe grooves 130 in the basic array unit 140 are referred to as a stripe groove 130a and a stripe groove 130b, and the sizes of the stripe groove 130a and the stripe groove 130b may be the same or different. The strip groove 130b is located on one side of the strip groove 130a along the width direction of the strip groove 130, and is staggered from the strip groove 130a by a first distance W1 along the length direction, and the first distance W1 is about half of the length of the strip groove 130, so that one end of one strip groove 130 is located in the central region of the other strip groove 130. In this way, after the basic array unit 140 is rectangular-arrayed, any two of the stripe grooves 130 adjacent in the width direction are arranged to be shifted from each other in the longitudinal direction.
Fig. 8 is a partially enlarged view of the distribution of the stripe grooves 130 of the inward bending region 41 and the outward bending region 42 provided in the first embodiment of the present application. The specific shape of the strip groove 130 of the inner bending region 41 and the outer bending region 42 and the positional relationship between the adjacent strip grooves 130 are explained in more detail with reference to fig. 8.
As shown in fig. 8, the strip groove 130 may specifically include a first groove segment 132 and second groove segments 133 at two ends of the first groove segment 132 along the length direction thereof. The first groove segment 132 may be an equal-width structure with an overall width of C, the second groove segment 133 may be an equal-width structure with a width of a, and the width a of the second groove segment 133 is greater than the width C of the first groove segment 132, so that the bar-shaped groove 130 forms a dumbbell-shaped structure with two wide ends and a thin middle part as a whole. Thus, the second groove segment 133 with a larger width can form a fillet transition with a larger radius at two ends of the strip-shaped groove 130, which is beneficial to reducing stress concentration during bending.
As shown in fig. 8, the second groove segment 133 has a length B along the length direction of the strip-shaped groove 130, and the value of the length B can be determined by those skilled in the art, which is not limited by the embodiment of the present application. It should be noted that, since the second groove segment 133 is used to form a rounded transition with a larger radius at two ends of the strip groove 130, the second groove segment 133 does not need to be set to be 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 is not greater than one tenth of the length G of the strip groove 130, not less than one twentieth of the length G of the strip groove 130, and the like.
It will be appreciated that the side of the strip groove 130 will have a width variation at the junction 134 of the first groove segment 132 and the second groove segment 133 due to the different widths of the first groove segment 132 and the second groove segment 133. To avoid stress concentrations in the strip groove 130 at the junction 134 of the first groove segment 132 and the second groove segment 133, the embodiment of the present application preferably forms a circular arc transition or spline curve transition at the junction 134 of the first groove segment 132 and the second groove segment 133.
As shown in fig. 8, two adjacent grooves 130 (i.e., two adjacent grooves 130a or two adjacent grooves 130b) are spaced apart by a certain distance F in the longitudinal direction of the grooves 130, as shown in fig. 7. In the width direction of the strip groove 130, two adjacent strip grooves (as shown in fig. 7, that is, the adjacent strip groove 130a and the adjacent strip groove 130b) are separated by a certain distance D, wherein the distance D may refer to a distance between the first groove segments 132 of the two adjacent strip grooves 130.
As shown in fig. 8, any two adjacent stripe grooves 130 in the width direction are distributed along the length direction in a staggered manner, and specifically satisfy the following positional relationship: for any two of the strip grooves 130 adjacent in the width direction, one end of one of the strip grooves 130 is close to the center of the other strip groove 130. In a preferred implementation, the overlapping length of two adjacent stripe-shaped grooves 130 in the length direction is (G-F)/2.
As shown in fig. 8, the vicinity of the center of each strip-shaped groove d may include the ends of at most four other strip-shaped grooves (e.g., strip-shaped grooves e, F, g, h), and since a certain distance F exists between two adjacent strip-shaped grooves e, F, g, h, a large non-grooved area may exist between the strip-shaped groove d and the strip-shaped grooves e, F, g, h, and this non-grooved area may generate a large stress during bending, which is not favorable for improving the bending performance of the whole support plate. To reduce this area, the center of each strip groove 130 also includes a transition region 135, and the side walls of the strip groove 130 are convex on both sides of the transition region 135 in a circular arc shape or spline shape, so that the width of the strip groove 130 at the transition region 135 is greater than the width of the first groove segment 132. The length of the transition region 135 may preferably be the same as the distance F. Thus, as shown in fig. 10, since the transition region 135 is added, the non-grooved region between the strip groove d and the strip grooves e, f, g, and h becomes smaller, and the distance between the strip groove d and the strip grooves e, f, g, and h becomes smaller, the stress of this region 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 groove 130 may satisfy the following dimensional constraints: the width A of the second groove section 133 is less than or equal to 0.6mm, and preferably less than or equal to 0.3 mm; the width C of the first groove section 132 is less than or equal to 0.4mm, and preferably less than or equal to 0.2 mm; the distance D between two adjacent strip-shaped grooves is more than or equal to 0.05mm, and the preferable distance D is more than or equal to 0.1 mm; the length G of the strip-shaped groove 130 is more than or equal to 1.5mm, and preferably, the length G is more than or equal to 3 mm; the distance F between two adjacent strip-shaped grooves is more than or equal to 0.3mm, and preferably, the distance F is more than or equal to 0.6 mm. The above dimensional constraints can not only improve the bending performance of the support plate 100, but also be easily realized in the process, thereby improving the yield and reliability of the process production.
Fig. 9 is a cross-sectional view of the inturned region 41 and the inturned region 42 of the support plate 100 shown in the first embodiment of the present application.
As shown in fig. 9, in the inner bending region 41, the etching depth H1 of the strip-shaped groove 130 is less than the thickness H3 of the support plate 100, so that the inner bending region 41 of the support plate 100 still has a certain thickness I1 at the position where the strip-shaped groove 130 is disposed, and I1-H3-H1, that is, the strip-shaped groove 130 does not penetrate through the support plate 100 in the inner bending region 41, which makes the first plate surface 110 of the support plate 100 still have structural continuity in the inner bending region 41, and does not have hollowing, so that the anti-extrusion and impact resistance of the inner bending region 41 are improved. In addition, because the first panel 110 is not hollowed in the inward bending region 41, the first panel 110 can keep a flat surface, so that no mold mark is generated after the display screen panel is attached to the first panel 110, which is beneficial to improving the display effect of the display screen module.
As shown in fig. 9, in the inner bending region 41, the thickness I1 of the strip-shaped groove 130 is preferably 0.02mm, which enables the strip-shaped groove 130 to have a sufficient depth, provides a sufficient deformation space for the material of the support plate 100 when the support plate 100 is bent, reduces the internal stress of the inner bending region 41, improves the bending performance of the inner bending region 41, and enables the inner bending region 41 of the support plate 100 to cope with a large degree of bending without damage.
As shown in fig. 9, in the outer bending region 42, the etching depth H2 of the stripe groove 130 is preferably half of the thickness H3 of the support plate 100, that is, H2 is 1/2H3, which not only enables the stripe groove 130 to provide a sufficient deformation space for the material of the support plate 100 when the support plate 100 is bent, reduces the internal stress of the outer bending region 42, improves the bending performance of the outer bending region 42, but also ensures that the anti-extrusion and anti-impact performance of the outer bending region 42 are improved.
As can be seen from fig. 4, in the inner folding screen apparatus, the bending radius of the support plate 100 in the inner bending area 41 is smaller than that of the outer bending area 42, which means that the support plate 100 is bent more in the inner bending area 41, and the requirement on the bending performance of the support plate 100 is higher, therefore, in the embodiment of the present application, the strip-shaped groove 130 of the inner bending area 41 can be etched deeper, and the strip-shaped groove 130 of the outer bending area 42 can be etched shallower, that is, the depth of the strip-shaped groove 130 in the inner bending area 41 is greater than that in the outer bending area 42, for example, the depth of the strip-shaped groove 130 in the inner bending area 41 is greater than one-half of the thickness of the support plate 100. Therefore, the strip-shaped groove 130 of the inner bending area 41 provides more deformation space when the inner bending area 41 is bent due to the larger depth, so that the internal stress of the inner bending area 41 is reduced to a greater extent, and the bending performance of the inner bending area 41 is improved; the bending radius of the outer bending region 42 is larger, and the internal stress generated during bending is naturally smaller than that of the inner bending region 41, so that the strip groove 130 can meet the bending performance by adopting a shallower depth, and the anti-extrusion and anti-impact performance of the outer bending region 41 can be ensured to the greatest extent.
In summary, in the technical solution provided in the first embodiment of the present application, the strip-shaped groove can provide a sufficient deformation space for the material of the support plate when the support plate is bent, so as to reduce the internal stress of the bending region and improve the bending performance of the bending region; moreover, the depth of the strip-shaped groove is smaller than that of the support plate and does not penetrate through the support plate, so that the structural continuity of the support plate is not damaged by the strip-shaped groove, and the extrusion resistance and the impact resistance of the support plate are ensured; in addition, because the bar groove only sets up at the second face, then do not set up the bar groove with the first face of display screen panel laminating, consequently, first face can keep smooth surface for display screen panel can not produce the die mark after laminating with first face, is favorable to improving the display effect of display screen module.
The following is a second embodiment of the present application.
Fig. 10 is a schematic view of a support plate structure provided in a second embodiment of the present application. As shown in fig. 10, the support plate 100 includes two upper and lower plate surfaces, and for convenience of description, in the embodiment of the present application, a plate surface of the support plate 100 attached to the display screen panel is referred to as a first plate surface 110, and a plate surface of the support plate 100 opposite to the first plate surface 110 is referred to as a second plate surface 120. The support plate 100 includes at least one bendable region, which may be divided into an inner bending region 41 (corresponding to a first bending region in the claims) and/or an outer bending region 42 (corresponding to a second bending region in the claims) according to the bending direction. Wherein the inner curved region 41 of the support plate 100 is provided with a plurality of first linear grooves 230, the first linear grooves 230 are preferably straight grooves, i.e. extend in a linear manner as a whole. The length direction of the first bar-shaped groove 230 may be set according to the bending direction of the support plate 100 (i.e., the bending direction of the display panel module), and is preferably parallel to the direction of the axis L when the support plate 100 is bent (i.e., the axis direction when the display panel module is bent). It should be noted that the first strip-shaped groove 230 is different from the first 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 to the second plate surface 120 of the support plate 100, and penetrates the support plate 100, so that the support plate 100 forms a hollow structure in the inward bending region 41.
As shown in fig. 10, the outwardly bent region 42 of the support plate 100 is provided with a plurality of second strip-shaped grooves 330. The second strip-shaped groove 330 is located on the second plate surface 120, and the second strip-shaped groove 330 is preferably a straight groove, and the length direction thereof may be set according to the bending direction of the support plate 100 (i.e., the bending direction of the display screen module), and is preferably in the direction of the axial line L when the support plate 100 is bent. It should be noted that, unlike the first strip-shaped groove 230, the depth of the second strip-shaped groove 330 is smaller than the thickness of the support plate 100, i.e. the second strip-shaped groove 330 does not penetrate through the support plate 100, so that the support plate 100 still has a certain thickness at the bottom of the second strip-shaped groove 330, and a continuous structure is maintained.
As shown in fig. 10, in one implementation, the second strip-shaped groove 330 extends from one end side to the other end side of the support plate along the direction of the axis L so as to penetrate the second plate surface 120 along the direction of the axis L.
In the embodiment of the present application, the first bar-shaped groove 230 and the second bar-shaped groove 330 have different shapes; the concrete expression is as follows: the first bar-shaped groove 230 has different widths at different position intervals in the length direction thereof; the second stripe-shaped groove 330 has the same width at each position in the length direction thereof. Implementations of the first and second elongated slots 230 and 330 are further described below in conjunction with fig. 11-12.
Fig. 11 is a schematic diagram of the distribution of the first and second linear grooves 230 and 330 according to the second embodiment of the present application.
As shown in fig. 11, in the inner bent region 41, the first linear groove 230 has a certain length G along the axis L direction of bending of the support plate 100; the first bar-shaped groove 230 may be transited by rounded corners 131 at both ends in the length direction thereof, so that the side surface of the first bar-shaped groove 230 is entirely smooth, and a large stress concentration does not occur when bending occurs.
As shown in fig. 11, in the inner bending region 41, a plurality of first linear grooves 230 are distributed in an array. The distribution of the plurality of first bar-shaped grooves 230 at the bending region can be regarded as two adjacent first bar-shaped grooves 230 as a basic array unit 240, and the basic array unit 240 is obtained by rectangular array along the length direction of the first bar-shaped grooves 230 and the width direction of the first bar-shaped grooves 230. For convenience of description, the two first bar-shaped grooves 230 in the basic array unit 240 are referred to herein as a first bar-shaped groove 230a and a first bar-shaped groove 230b, and the first bar-shaped groove 230a and the first bar-shaped groove 230b may be the same or different in size. Wherein the first bar-shaped groove 230b is positioned at one side of the first bar-shaped groove 230a in the width direction of the first bar-shaped groove 230a and is offset from the first bar-shaped groove 230a by a first distance W1 in the length direction, the first distance W1 being about half the length of the first bar-shaped groove 230 such that one end of one of the first bar-shaped grooves 230 is positioned at the center region of the other first bar-shaped groove 230. In this way, after the basic array unit 240 is rectangular-arrayed, any two first linear grooves 230 adjacent in the width direction are arranged to be shifted from each other in the length direction.
In one implementation, the specific shape of the first bar-shaped groove 230 and the position relationship between the adjacent first bar-shaped grooves 230 can be implemented by referring to the bar-shaped groove 130 in fig. 8, and details thereof are not repeated herein.
As shown in fig. 11, in the inflection region 42, the plurality of second stripe-shaped grooves 330 are distributed in a linear array along a direction perpendicular to the axis L. The second stripe-shaped groove 330 has the same width at each position in the length direction thereof. The number of the second grooves 330 may be determined according to the length of the outer bent region 42 in the direction perpendicular to the axis L, and the larger the length of the outer bent region 42 is, the larger the number of the second grooves 330 is, the smaller the length of the outer bent region 42 is, and the smaller the number of the second grooves 330 is.
Fig. 12 is a cross-sectional view of the inturned region 41 and the inturned region 42 of the support plate 100 shown in the second embodiment of the present application.
As shown in fig. 12, in one implementation, in order to avoid the problem of generating a mold mark when the display screen panel is attached to the support plate 100, the flexible medium 160 is filled in each first linear groove 230 (in fig. 12, the flexible medium 160 is only illustrated in a part of the first linear grooves 230, and the remaining first linear grooves 230 not shown in the flexible medium 160 are also filled with the flexible medium 160), and the area where the flexible medium 160 is filled and the area where the support plate 100 is not grooved are located in the same plane, so that the mold mark is not generated after the display screen panel is attached.
In one implementation, the flexible medium 160 may be, for example, Liquid Silicone Rubber (LSR). The liquid silicone rubber may be injected into the first bar-shaped groove 230 through a Liquid Injection Molding System (LIMS) such that the liquid silicone rubber forms an integral structure with the body of the support plate 100.
The injection molding process of the liquid silicone gel according to the embodiments of the present application is exemplified below. Generally, the liquid silica gel is a two-component gel comprising a gel A and a gel B, wherein the gel A and the gel B are liquid at normal temperature and can be rapidly cured by heating to a certain temperature after being mixed. Before injection molding, firstly, executing a material mixing process, namely mixing glue A and glue B; then, the mixed liquid silica gel is injected into the first bar-shaped groove 230, preferably filling the whole first bar-shaped groove 230; finally, the injected liquid silicone gel is heated and pressurized to be cured, the cured liquid silicone gel is integrated with the main structure of the support plate 100, and the liquid silicone gel and the plate surface of the support plate 100 are located in the same plane.
As shown in FIG. 12, in one implementation mode, the second strip-shaped groove 330 is a trapezoidal groove, the width W2 of the second strip-shaped groove 330 gradually decreases from the groove top to the groove bottom, the width W2 of the second strip-shaped groove 330 is less than or equal to 4mm, and the width W2 is less than or equal to 2 mm. The etching depth H2 of the second stripe-shaped groove 330 is preferably half of the thickness H3 of the support plate 100, i.e., H2 is 1/2H3, which not only enables the second stripe-shaped groove 330 to provide a sufficient deformation space for the material of the support plate 100 when the support plate 100 is bent, reduces the internal stress of the outer bending region 42, improves the bending performance of the outer bending region 42, but also ensures that the anti-extrusion and anti-impact performance of the outer bending region 42 are improved.
In summary, in the technical solution provided in the second embodiment of the present application, the support plate is provided with the first strip-shaped groove and the second strip-shaped groove, so that a sufficient deformation space for a material of the support plate can be provided when the support plate is bent, an internal stress of the bending area is reduced, and a bending performance of the bending area is improved; in addition, in the outward bending area, because the depth of the second strip-shaped groove is smaller than that of the support plate and does not penetrate through the support plate, the structural continuity of the outward bending area of the support plate cannot be damaged by the second strip-shaped groove, and the extrusion resistance and the impact resistance of the outward bending area of the support plate are ensured.
The following is a third embodiment of the present application.
The present application provides a bar-shaped groove of a dumbbell-shaped structure in the first embodiment, and it is understood that the bar-shaped groove in the embodiments of the present application may have other shapes besides the dumbbell-shaped structure. The third embodiment of the present application provides another strip-shaped groove, which may be the strip-shaped groove 130 in the first embodiment of the present application or the first strip-shaped groove 230 in the second embodiment of the present application, and the array manner thereof may also refer to the array manner of the strip-shaped groove 130 in the first embodiment of the present application or the first strip-shaped groove 230 in the second embodiment of the present application.
Fig. 13 is a schematic structural diagram of a stripe groove according to a third embodiment of the present application. As shown in fig. 13, the strip-shaped groove 430 includes a transition section 431 and extension sections 432 at both ends of the transition section 431 and extending away from the transition section 431. In the length direction of the strip-shaped groove 430, the width of the transition section 431 has a minimum value k at both ends thereof, and gradually increases toward the center of the transition section 431, and the center of the transition section 431 is in a circular arc shape or spline-shaped transition, so that the strip-shaped groove 430 has smooth side walls at the transition section 431. The width of the extension 432 has a minimum value k near one end of the transition 431 and gradually increases in a fan shape in a direction away from the transition 431, and the extension 432 transitions in a circular arc shape at both ends away from the transition 431. The junction of the transition section 431 and the extension section 432 is in the shape of a circular arc or spline transition.
In one example, as shown in FIG. 13, the radius R of the rounded transition at both ends of the extension 432 is 0.6mm or less, preferably 0.3mm or less; when the extension section 432 is increased in a fan shape, the included angle beta between the two side wall surfaces of the strip-shaped groove 430 is less than or equal to 20 degrees, and the preferred included angle beta is less than or equal to 10 degrees; the width K of the center of the transition section 431 is less than or equal to 0.6mm, and the preferred width K is less than or equal to 0.3 mm; the length G of the strip-shaped groove 430 is more than or equal to 1.5mm, and preferably, the length G is more than or equal to 3 mm; the distance F between two adjacent strip-shaped grooves 430 is less than or equal to 1.2mm, and the preferable distance F is less than or equal to 0.6 mm. The size restriction can improve the bending performance of the supporting plate, and the bending performance can be easily realized in the technical process, so that the yield and the reliability of the technical production are improved.
The strip-shaped groove provided by the embodiment of the application is beneficial to reducing the stress concentration of the support plate during bending, reduces the stress during bending, and improves the integral bending performance of the support plate.
The embodiment of the application provides an electronic device which can be a folding screen device, a scroll screen device or any electronic device with a bendable display screen. The electronic device can comprise one or more display screen modules, wherein at least one display screen module comprises the support plate provided by the embodiment of the 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, where the inner screen refers to a display screen module hidden in a folded state of the body, and the outer screen refers to a display screen module exposed in any state of the body, and the inner screen includes the support plate provided by the embodiment of the present application, so as to provide good bending performance, and good anti-extrusion and anti-impact performance.
In an implementation manner, a 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 third 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 corresponds to the bending area of the support plate, so that the electronic equipment can be bent in the third display area to form a folding screen equipment shape.
It is understood that a person skilled in the art can combine, split, recombine and the like the embodiments of the present application to obtain other embodiments on the basis of several embodiments provided by the present application, and the embodiments do not depart from the scope of the present application.
The above embodiments are only for illustrating the embodiments of the present invention and are not to be construed as limiting the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the embodiments of the present invention shall be included in the scope of the present invention.
Claims (14)
1. A display screen module, comprising: a support plate and a display screen panel;
the supporting plate comprises a first plate surface and a second plate surface, the first plate surface and the second plate surface are arranged back to back, and the first plate surface is used for being attached to the display screen panel;
the support plate comprises 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-shaped groove is parallel to the axis line of the display module when the display module is bent;
the depth of the strip-shaped groove is smaller than or equal to the thickness of the supporting plate.
2. The display screen module of claim 1,
the bending area comprises a first bending area and a second bending area, the display screen module is used for bending towards one side of the display screen panel in the first bending area, and the display screen module is used for bending towards one side of the supporting plate in the second bending area;
the second face is in first bending zone with the second bending zone all is provided with a plurality of the bar groove, the degree of depth in bar groove is less than the thickness of supporting plate, so that the backup pad is in the bottom in bar groove has certain thickness, with not setting up the region in bar groove forms continuous structure.
3. The display screen module of claim 2,
the depth of the strip-shaped groove in the first bending area is greater than that of the strip-shaped groove in the second bending area.
4. The display screen module of claim 2,
the depth of the strip-shaped groove in the first bending area is larger than one half of the thickness of the supporting plate, and the depth of the strip-shaped groove in the second bending area is equal to one half of the thickness of the supporting plate.
5. The display screen module of claim 1,
the bending area comprises a first bending area and a second bending area, the display screen module is used for bending towards one side of the display screen panel in the first bending area, and the display screen module is used for bending towards one side of the supporting plate in the second bending area;
the plurality of strip-shaped grooves comprise a plurality of first strip-shaped grooves positioned in the first bending area and a plurality of second strip-shaped grooves positioned in the second bending area; the depth of the first strip-shaped groove is equal to the thickness of the supporting plate, so that a hollow structure is formed in the first bending area; the depth of the second strip-shaped groove is smaller than the thickness of the support plate, so that the support plate has a certain thickness at the bottom of the second strip-shaped groove and forms a continuous structure with an area where the second strip-shaped groove is not arranged.
6. The display screen module of claim 1, further characterized in that,
the first strip-shaped groove and the second strip-shaped groove are different in shape;
the first strip-shaped groove has different widths in different position intervals in the length direction;
the second strip-shaped groove has equal width at each position in the length direction.
7. The display screen module of claim 5 or 6,
the second strip-shaped groove penetrates through the second plate surface along the axial lead direction when the display module is bent.
8. The display screen module of claim 7,
the depth of the second strip-shaped groove is equal to one half of the thickness of the supporting plate.
9. The display screen module of any of claims 1-4,
the strip-shaped groove comprises a first groove section and second groove sections positioned at two ends of the first groove section in the length direction;
the first groove section and the second groove section are both of equal-width structures;
the width of the second groove section is larger than that of the first groove section;
the junction of the first groove section and the second groove section is in fillet transition.
10. The display screen module of claim 9,
the center of the strip-shaped groove comprises a transition area, and the side wall of the strip-shaped groove protrudes in the transition area in a circular arc shape or spline shape, so that the width of the strip-shaped groove in the transition area is larger than that of the first groove section.
11. The display screen module of any of claims 1-4,
the strip-shaped groove comprises a transition section and extension sections positioned at two ends of the transition section;
the width of the transition section is gradually increased from two ends to the center;
the width of the extension section has a minimum value near one end of the transition section and gradually increases in a fan shape along a direction away from the transition section;
the junction of the transition section and the extension section is in arc-shaped or spline-shaped transition.
12. A display screen module according to any one of claims 1 to 11,
the two ends of the strip-shaped groove in the length direction are in fillet transition.
13. An electronic device, comprising: at least one display screen module according to any one of claims 1 to 12.
14. The electronic device of claim 13, wherein the display screen module comprises a first display area, a second display area, and a third 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 corresponds to the bending area of the support plate, so that the electronic device is used for bending in the third display area.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110474258.5A CN113257123A (en) | 2021-04-29 | 2021-04-29 | Display screen module and electronic equipment |
| PCT/CN2022/072701 WO2022227727A1 (en) | 2021-04-29 | 2022-01-19 | Display screen module and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110474258.5A CN113257123A (en) | 2021-04-29 | 2021-04-29 | Display screen module and electronic equipment |
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| CN113257123A true CN113257123A (en) | 2021-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110474258.5A Pending CN113257123A (en) | 2021-04-29 | 2021-04-29 | Display screen module and electronic equipment |
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| CN (1) | CN113257123A (en) |
| WO (1) | WO2022227727A1 (en) |
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| WO2023138017A1 (en) * | 2022-01-18 | 2023-07-27 | 荣耀终端有限公司 | Display assembly and electronic device |
| CN114446170A (en) * | 2022-01-29 | 2022-05-06 | 合肥维信诺科技有限公司 | Supporting plate, foldable display module and foldable display device |
| WO2023221060A1 (en) * | 2022-05-19 | 2023-11-23 | 北京小米移动软件有限公司 | Foldable screen and terminal device |
| EP4300255A1 (en) * | 2022-06-29 | 2024-01-03 | Samsung Display Co., Ltd. | Display device |
| CN115240557A (en) * | 2022-08-02 | 2022-10-25 | 昆山国显光电有限公司 | Display module and display device |
| CN115331551A (en) * | 2022-08-09 | 2022-11-11 | 维沃移动通信有限公司 | Folding screen and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022227727A1 (en) | 2022-11-03 |
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