WO-2026091060-A1 - SUPPORT PLATE, DISPLAY MODULE, ELECTRONIC DEVICE, AND METHOD FOR MANUFACTURING SUPPORT PLATE

WO2026091060A1WO 2026091060 A1WO2026091060 A1WO 2026091060A1WO-2026091060-A1

Abstract

A support plate (16), a display module (10), an electronic device (100), and a method for manufacturing the support plate (16), relating to the technical field of electronic devices. The support plate (16) can solve the problem of poor compression resistance and impact resistance of existing display modules (10). The support plate (16) comprises a bending portion (160) capable of bending relative to the axis (L1), wherein the bending portion (160) comprises a first surface (16a) and a second surface (16b) opposite each other in the direction of thickness of the support plate (16), the bending portion (160) has a plurality of through holes (165a) extending through the support plate (16) in the direction of thickness of the support plate (16). Each through hole (165a) comprises a first opening (165a1) and a second opening (165a2) respectively located at two ends of the through hole (165a), the first opening (165a1) having a smaller area than the second opening (165a2).

Inventors

ZHAO, Baoxuan
LIU, Fangcheng

Assignees

荣耀终端股份有限公司

Dates

Publication Date: 20260507
Application Date: 20241031

Claims (19)

A support plate, characterized in that it includes a bendable bending portion, the bending portion having a plurality of through holes, the through holes penetrating the support plate along the thickness direction of the support plate; The through hole includes a first opening and a second opening located at both ends of the through hole, wherein the area of the first opening is smaller than the area of the second opening.
According to claim 1, the support plate is characterized in that the bending portion can be bent relative to an axis, the through hole is an elongated through hole, and the through hole extends in a direction parallel to the axis.
The support plate according to claim 1 or 2 is characterized in that the support plate includes a first surface and a second surface that are opposite to each other along the thickness direction, and the first opening is located on the first surface; The bent portion also has a first groove, which is formed by the second surface recessing into the first surface, and the second openings of the plurality of through holes all penetrate the bottom wall of the first groove.
The support plate according to any one of claims 1-3 is characterized in that the through hole is located between the first opening and the second opening at the minimum cross-sectional area perpendicular to the thickness direction of the support plate.
According to claim 4, the support plate is characterized in that, in the thickness direction of the support plate, the distance between the through hole and the first opening at the minimum cross-sectional area perpendicular to the thickness direction of the support plate is a first distance. The distance between the through hole at its minimum cross-sectional area perpendicular to the thickness direction of the support plate and the second opening is the second distance, and the first distance is less than the second distance.
According to claim 4 or 5, the support plate is characterized in that, from the point of minimum cross-sectional area perpendicular to the thickness direction of the support plate to both ends of the through hole, the cross-sectional area of the through hole gradually increases along the thickness direction of the support plate.
The support plate according to any one of claims 1-3 is characterized in that, in the direction from the first opening to the second opening, the cross-sectional area of the through hole gradually increases along the thickness direction of the support plate.
The support plate according to any one of claims 1-7 is characterized in that the bending portion is capable of bending relative to an axis, and the first direction is perpendicular to both the axis and the thickness direction of the support plate; The difference between the maximum dimension of the first opening along the first direction and the maximum dimension of the second opening along the first direction is greater than or equal to 0.03 mm and less than or equal to 0.16 mm.
According to claim 8, the support plate is characterized in that the dimension of the first opening along the first direction is less than or equal to the length of the through hole along the thickness direction of the support plate.
According to claim 9, the support plate is characterized in that the difference between the dimension of the first opening along the first direction and the length of the through hole along the thickness direction of the support plate is less than or equal to 0.04 mm.
According to claim 3, the support plate is characterized in that, in the thickness direction of the support plate, the ratio of the depth of the first groove to the thickness of the support plate is greater than or equal to 0.1 and less than or equal to 0.4.
The support plate according to any one of claims 1-11 is characterized in that the bending portion is capable of bending relative to an axis, the first direction is perpendicular to both the axis and the thickness direction of the support plate, and the support plate includes a first surface and a second surface that are opposite to each other along the thickness direction. The bending portion includes a first sub-bending portion and two second sub-bending portions. Along the first direction, the two second sub-bending portions are respectively disposed on both sides of the first sub-bending portion, and the plurality of through holes are located in the first sub-bending portion. The second sub-bend includes a plurality of second grooves, which are formed by recessing from the second surface toward the first surface and extend in a direction parallel to the axis.
According to claim 12, the support plate is characterized in that, in a direction parallel to the axis, the bending portion includes a first end face and a second end face facing away from each other, and the bending portion further includes at least one notch, the notch being formed by one of the first end face and the second end face being recessed into the other. The notch extends through the first surface and the second surface, and the second groove communicates with the notch at at least one end in a direction parallel to the axis.
According to claim 13, the support plate is characterized in that, in a direction parallel to the axis, the depth of the notch is greater than or equal to 0.05 mm and less than or equal to 0.3 mm.
A display module, characterized in that it comprises: The display panel includes a display surface and a backlight surface facing each other; Cover plates are stacked on the display surface; The support plate is the support plate according to any one of claims 1-14, and the support plate is stacked on the backlight surface; the first opening is closer to the display panel than the second opening.
An electronic device, characterized in that it comprises: The display module is the display module as described in claim 15; A support device is disposed on the side of the support plate opposite to the display panel.
The electronic device according to claim 16, characterized in that, The support device includes a first housing, a second housing, and a rotating shaft mechanism. The rotating shaft mechanism is disposed between the first housing and the second housing, and the support device supports the display module.
A method for manufacturing a support plate, characterized by comprising: A first mask layer is formed on the third surface of the support blank, and a second mask layer is formed on the fourth surface of the support blank; the third surface and the fourth surface are two surfaces of the support blank that are opposite to each other in the thickness direction; the first mask layer has a first perforation, and the second mask layer has a second perforation; The support plate blank is etched through the first and second perforations to form a through hole that penetrates the support plate blank along the thickness direction of the support plate blank. The through hole includes a first opening and a second opening along the thickness direction of the support plate blank. The time taken to etch the support plate blank through the first perforation is greater than the time taken to etch the support plate blank through the second perforation, so that the area of the first opening is smaller than the area of the second opening.
A method for manufacturing a support plate, characterized by comprising: A first mask layer is formed on the third surface of the support blank, and a second mask layer is formed on the fourth surface of the support blank; the third surface and the fourth surface are two surfaces of the support blank that are opposite to each other in the thickness direction, the first mask layer has a first perforation, and the second mask layer covers the fourth surface; The support plate blank is etched through the first perforation to form a through hole penetrating the support plate blank.

Description

Support plate, display module, electronic device, and manufacturing method of support plate Technical Field This application relates to the field of electronic equipment technology, and in particular to a support plate, a display module, an electronic device, and a method for manufacturing the support plate. Background Technology Currently, in order to provide users with a better sensory experience, larger screens have become an inevitable development trend for display-based smart terminal products such as mobile phones, laptops, and tablets. However, larger screens also increase the size of the smart terminal, making it less convenient to carry around. To address the aforementioned issues, foldable electronic devices have emerged. When folded, these devices achieve a smaller size, making them easier for users to carry. The electronic device includes at least a flexible display screen and a support plate for supporting the flexible display screen. The flexible display screen includes a bending portion, and the support plate has through holes in the area corresponding to the bending portion to improve the bending performance of the support plate. However, setting through holes in the area corresponding to the bend on the support plate will make the bend of the flexible display screen less resistant to compression and impact, and the display screen is prone to display failure problems such as bright spots and black spots, which will reduce the user experience. Summary of the Invention This application provides a support plate, a display module, an electronic device, and a method for manufacturing the support plate. The support plate can solve the problems of poor extrusion resistance and poor impact resistance of existing display modules. To achieve the above objectives, the embodiments of this application adopt the following technical solutions: In a first aspect, this application provides a support plate including a bendable portion having a plurality of through holes extending through the support plate along its thickness direction. Each through hole includes a first opening and a second opening located at opposite ends, the area of the first opening being smaller than the area of the second opening. The aforementioned support plate can be used in a foldable display module. In the foldable display module, the support plate supports the backlight surface of the display panel, the bent portion of the support plate corresponds to the bent area of the display panel, and the first opening of the through hole on the support plate is closer to the display panel than the second opening. Because the area of the first opening is smaller than the area of the second opening, the solid area on the surface of the support plate used to support the display panel is larger than the solid area on the surface of the support plate facing away from the display panel. This means the contact area between the support plate and the display panel is increased. When the display module is subjected to impacts or pressure, stress is transferred to the support plate. The support plate disperses this stress using its first surface. The increased solid area of the support plate used to support the display panel avoids stress concentration on the support plate, thus preventing display module failure and further improving the reliability of the support plate's support for the display panel. From another perspective, the reduced area of the first opening increases the solid portion of the support plate near the display panel, thus improving its rigidity. When the display module is subjected to impacts or pressure, stress is transferred to the support plate. The support plate's high rigidity resists this stress, preventing breakage and thus avoiding issues like bright spots and black spots on the display panel. This further enhances the reliability of the support plate's support for the display panel. In one possible design of the first aspect, the bending portion can be bent relative to an axis, and the through hole is an elongated through hole extending in a direction parallel to the axis. This improves the bending resilience of the bending portion and enhances the user experience when bending the support plate. In one possible design of the first aspect, the support plate includes a first surface and a second surface opposite to each other along the thickness direction, with through holes penetrating both the first and second surfaces. A first opening is located on the first surface, and a second opening is located on the second surface. In this way, multiple through holes penetrate the support plate to form a bent portion of the support plate, resulting in a simple support plate structure that is easy to manufacture. In one possible design of the first aspect, the support plate includes a first surface and a second surface opposite to each other along the thickness direction, with a first opening located on the first surface. The bent po