CN108597380B

CN108597380B - display panel

Info

Publication number: CN108597380B
Application number: CN201810791997.5A
Authority: CN
Inventors: 王�琦; 朱昆鹏
Original assignee: Kunshan Govisionox Optoelectronics Co Ltd
Current assignee: Kunshan Govisionox Optoelectronics Co Ltd
Priority date: 2018-07-18
Filing date: 2018-07-18
Publication date: 2023-10-20
Anticipated expiration: 2038-07-18
Also published as: CN108597380A

Abstract

In the display panel provided by the application, the supporting part comprises the supporting head and the supporting main body. The hardening layer is arranged on the surface of the supporting head and is attached to the first surface through the bonding layer. The hardened layer is attached to the first surface together, so that the flexible screen body in the bending area can be effectively supported, the flexible screen body in the bending area is prevented from being damaged due to bending stress or external force impact, and the bending state of the bending area can be effectively ensured to be stable.

Description

Display panel

Technical Field

The present application relates to the field of display, and in particular, to a display panel.

Background

With more and more flexible screen bodies, the phenomenon of poor display of the screen bodies caused by folding the flexible screen bodies is more and more. The stress generated after the flexible screen body is folded influences the reliability of the display module structure. Bending stress of a bending area of the flexible screen body is large, and the bending area is positioned at the edge of the screen body and is easy to damage due to external force impact.

Disclosure of Invention

Based on this, it is necessary to provide a display panel against the problem that the bending region of the flexible screen body is easily damaged.

A display panel, comprising:

the flexible screen body comprises a display area, a bending area and an extension area which are sequentially arranged, wherein the display area and the extension area are arranged in parallel, the bending area comprises a first surface and a second surface which are oppositely arranged, and the flexible screen body is bent towards the first surface;

the support part is clamped between the display area and the extension area and comprises a support head and a support main body, and the support head is close to the bending area;

the hardening layer is arranged on the surface of the supporting head, an adhesive layer is coated on the surface of the hardening layer, and the supporting head and the first surface are attached together through the adhesive layer.

In one embodiment, the material of the hardened layer comprises aluminum oxide, ceramic, or an organic gel.

In one embodiment, the first surface is provided with a plurality of grooves at intervals, and the adhesive layer fills the plurality of grooves.

In one embodiment, the cross section of the groove is circular, and the diameter of the groove gradually increases from the middle of the first surface to the two sides of the first surface.

In one embodiment, the inner wall of the groove is provided with burrs, and the adhesive layer is attached to the inner wall of the groove through the burrs.

In one embodiment, the thickness of the hardened layer tapers from a middle portion of the inflection region to both sides of the inflection region.

In one embodiment, the method further comprises a plurality of reinforcing particles, wherein the reinforcing particles are arranged on the surface of the hardening layer, which is close to the supporting head, at intervals.

In one embodiment, an end of the support head adjacent to the bending region is an arcuate surface having a different radius of curvature.

In one embodiment, the display device further comprises two support films respectively arranged between the display area and the support part and between the extension area and the support part.

In one embodiment, the display device further comprises a composite glue layer arranged between the display area and the support film.

Drawings

FIG. 1 is a schematic diagram of a display panel according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a display panel according to an embodiment of the application;

fig. 3 is a schematic view of a display panel according to another embodiment of the application.

Reference numerals illustrate:

display panel 10

Flexible screen 100

Display area 110

Inflection region 120

First surface 121

Groove 122

Second surface 123

Extension region 130

Support 200

Support head 210

Support body 240

Hardened layer 220

Reinforcing particles 221

Adhesive layer 230

Support film 300

Composite glue layer 400

Cover layer 500

Touch sensing layer 510

Polarizer 520

Cover plate 530

Ink layer 540

First adhesive layer 550

Second adhesive layer 560

The drive unit 610

Flexible circuit board 620

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the following embodiments are used to further describe the display panel of the present application in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated. In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature level is higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature level is less than the second feature.

Referring to fig. 1-2, a display panel 10 is provided according to an embodiment of the present application. The display panel 10 includes a flexible screen body 100 and a support head 210. The flexible screen body 100 includes a display area 110, a bending area 120 and an extension area 130, which are sequentially arranged. The display area 110 and the extension area 130 are disposed in parallel. The inflection zone 120 includes a first surface 121 and a second surface 123 disposed opposite each other. The flexible screen 100 is curved toward the first surface 121. The supporting portion 200 is sandwiched between the display area 110 and the extension area 130. The support 200 includes a support head 210 and a support body 240. The support head 210 is adjacent to the inflection zone (120). The hardened layer 220 is disposed on the surface of the supporting head 210. The surface of the hardened layer 220 is coated with an adhesive layer 230. The support head 210 is attached to the first surface 121 by the adhesive layer 230. The flexible screen 100 may have a flexible substrate. The flexible substrate may have a display driving circuit, an array of light emitting diodes, and the like. The flexible screen 100 may be an OLED display. The flexible screen body 100 may be bent along a certain direction, or may be bent along a plurality of directions at the same time. The surface of the display area 110 facing away from the support 200 may be used to display a pattern. It is understood that the display area 110 may have a frame around the periphery of the surface to be displayed. The bezel may serve as a non-display area. When the display panel 10 is a full screen display, the bezel may have a small width or no bezel.

The inflection zones 120 may be used to bend the flexible screen 100. The inflection zones 120 may not have a distinct demarcation line. The size and bend radius of the inflection region 120 may be flexibly changed. In one embodiment, the base material of the inflection region 120 is more flexible than the materials of the display region 110 and the extension region 130. The extension 130 may be used to provide a circuit device. A display pattern is visible in the display area 110 of the second surface 123.

After the flexible screen 100 is bent, a U-shaped structure may be formed by the bending region 120. Inside the U-shaped structure may be the first surface 121. Outside the U-shaped structure is the second surface 123. The parallel arrangement of the extension area 130 and the display area 110 may enable the display panel 10 to have a plate-like structure, and facilitate the fixation of the flexible screen 100. It is understood that the display area 110, the inflection area 120, and the extension area 130 may be integrally formed.

The supporting portion 200 may serve to support the flexible screen 100 after bending, to prevent the flexible screen 100 from being damaged by external pressure. The support body 240 may have two relatively parallel surfaces. The display region 110 and the extension region 130 are disposed parallel to the two opposite parallel surfaces, respectively, to minimize the thickness of the display panel 10.

In one embodiment, the bonding layer 230 may be an organic glue, an optically clear adhesive, or the like. The adhesive layer 230 may have a certain flexibility. Therefore, the adhesive layer 230 may play a role of buffering when the flexible screen 100 located in the bending region 120 is impacted by external force, so as to further enhance the stability of the flexible screen 100 located in the bending region 120.

In one embodiment, the support body 240 may be a cubic structure. The support head 210 is disposed at one end of the cube. It will be appreciated that the shape of the support head 210 may determine the shape and degree of bending of the bending region 120. The support 200 may be made of a material having a certain hardness and flexibility. The support body 240 has a certain hardness to prevent the flexible screen from being damaged by the pressing. The support body 240 has a certain toughness to help the flexible screen to cushion external pressure impact. In one embodiment, the support body 240 may be made of silicone. In one embodiment, the inside of the support body 240 may be made of a hard material, and the outside of the support body 240 may be made of a soft material. In one embodiment, the inner material of the support body 240 is hard plastic, and the outer surface of the support body 240 is rubber material.

In one embodiment, the support body 240 and the support head 210 may be integrally formed. The support body 240 and the support head 210 may also be connected by a mechanical connection.

The stiffening layer 220 may be used to increase the strength of the flexible screen 100 at the inflection zone 120. In one embodiment, the material of the hardened layer 220 includes aluminum oxide, ceramic, or an organic gel. The hardening layer 220 may be an organic adhesive coated on the surface of the supporting head 210, and formed through a hardening process. The hardening process may be a high temperature hardening process or an ion exchange process. It will be appreciated that the flexible screen 100 located in the bending zone 120 may be subject to deformation stress due to bending deformation. Compressive stress may be generated at the first surface 121 and tensile stress may be generated at the second surface 123. The distance between molecules of the material of the second surface 123 is large and is easily damaged. The hardened layer 220 is disposed on the surface of the supporting head 210 near the bending region 120, and can effectively resist the pressure from the outside on the bending region 120, disperse the pressure, and reduce the pressure locally applied to the flexible screen body 100 in the bending region 120. Therefore, the hardened layer 220 may effectively prevent the bending region 120 from being damaged due to bending stress or external impact force.

In the display panel 10 provided by the present application, the supporting part 200 includes the supporting head 210 and the supporting body 240. The hardened layer 220 is disposed on the surface of the supporting head 210, and is adhered to the first surface 121 through the adhesive layer 230. The hardened layer 220 is attached to the first surface 121, so that the flexible screen body 100 located in the bending region 120 can be effectively supported, damage to the flexible screen body 100 located in the bending region 120 due to bending stress or external impact is avoided, and stable bending state of the bending region 120 can be effectively ensured.

In one embodiment, the first surface 121 is provided with a plurality of grooves 122 at intervals. The bonding layer 230 fills the plurality of grooves 122. The surface of the groove 122 may cover the adhesive layer 230. The grooves 122 may roughen the first surface 121, thus enhancing friction between the adhesive layer 230 and the first surface 121, and enhancing adhesive strength. The cross-section of the groove 122 may be circular or irregular polygonal. Since the first surface 121 has a compressive deformation stress, the density between molecules of the material increases, and the deformation stress of the first surface 121 can be released by providing the grooves 122, so that the bending region 120 is prevented from being damaged due to the accumulation of the deformation stress.

In one embodiment, the grooves 122 are circular in cross-section. The diameter of the groove 122 becomes gradually larger from the middle of the first surface 121 to both sides of the first surface 121. It will be appreciated that the process of making the recess 122 with a circular cross-sectional area is readily accomplished. The curved shape of the inflection zone 120 may be arcuate. The bending deformation of the arc-top area is thus greatest and the deformation stress accumulated at said first surface 121 is also greatest. The deformation stress can be effectively released by providing the groove 122 having a larger diameter at the arc top, that is, the middle portion of the bending region 120. The deformation stress of the first surface 121 gradually decreases from the middle of the first surface 121 to both sides of the first surface 121. The diameter of the corresponding recess 122 may also be gradually reduced, so that the stress relief of the first surface 121 may be made more uniform.

Referring to fig. 3, in one embodiment, the inner wall of the recess 122 is provided with a burr 124. The adhesive layer 230 is attached to the inner wall of the groove 122 by the burrs. The burr 124 may be a separate structure provided on the inner surface of the recess 122. The burr 124 may also be formed by a wire drawing process during the formation of the recess 122. When the adhesive layer 230 is applied to the inner surface of the groove 122, the burr 124 may increase the adhesive force between the groove 122 and the adhesive layer 230. The burrs 124 can improve the firmness between the grooves 122 and the adhesive layer 230 by approximately 30%.

In one embodiment, the thickness of the hardened layer 220 is tapered from the middle of the inflection region 120 to both sides of the inflection region 120. The arcuate surface may correspond to the curved shape of the curved region 120, and thus the arcuate surface may conform to the first surface 121. It will be appreciated that the radius of curvature of the arcuate surfaces and the first surface 121 may be the same, thus ensuring an optimal fit. When the bending region 120 is in an arc shape, the arc top deforms the most, and the deformation stress is the greatest, so that the impact resistance is the worst. And the bending area 120 is located at the edge of the flexible screen body 100, which is more easily damaged by collision. Thus, the hardened layer 220 located in the middle of the inflection zone 120 is thickest, and the deformation resistance and impact resistance of the dome of the inflection zone 120 can be further enhanced.

In one embodiment, the display panel 10 further includes a plurality of reinforcing particles 221. The reinforcing particles 221 are disposed on the surface of the hardened layer 220 near the supporting head 210 at intervals. The reinforcing particles 221 may be an inorganic material. In one embodiment, the strengthening particles 221 may be ceramic strengthening particles 221. The reinforcing particles 221 may be partially embedded in the surface of the support head 210 adjacent to the hardened layer 220. The reinforcing particles 221 may enhance friction between the hardened layer 220 and the support head 210. When the hardened layer 220 is formed on the surface of the supporting head 210, the hardened layer 220 may shrink and deform during hardening of the hardened layer 220. The hardened layer 220 is tightly wrapped around the reinforcing particles 221 after shrinking, so that the connection between the hardened layer 220 and the supporting head 210 can be ensured, and the hardened layer 220 is prevented from falling off.

In one embodiment, the surface of the support head 210 adjacent to the bending region 120 is an arc-shaped surface. The arcuate surfaces have different radii of curvature. The adhesion between the flexible screen 100 and the supporting head 210 can be increased.

In one embodiment, the radius of curvature of the curved surface in the middle of the support head 210 is smaller than the radius of curvature of the curved surfaces on both sides of the support head 210. The first surface 121 of the bending region 120 is to be attached to the supporting head 210. The shape of the support head 210 may thus determine the curved shape of the inflection zone 120. When the radius of curvature of the curved surface in the middle of the supporting head 210 is smaller than the radius of curvature of the curved surfaces on both sides of the supporting head 210, the radius of curvature of the middle portion of the bending region 120 is also smaller than the radius of curvature of the curved surfaces on both sides of the bending region 120. The smaller bending radius of the middle portion of the bending region 120 may make the deformation of the middle portion of the bending region 120 relatively gentle, so as to avoid the flexible screen body 100 from being damaged by abrupt deformation. Meanwhile, when the bending region 120 is impacted by external force, the impact force can be effectively transferred to the periphery, so that the stability of the bending region 120 is further enhanced.

In one embodiment, the arcuate surface is a frosted surface. The frosted surface may increase friction between the hardened layer 220 and the supporting head 210, and thus may prevent the hardened layer 220 from falling off.

In one embodiment, the display panel 10 further includes two support films 300. The support film 300 is disposed between the display area 110 and the support 200, and between the extension area 130 and the support 200, respectively. The support film 300 may be a polyethylene terephthalate or polyimide film. The support film 300 may have a certain hardness and toughness. It is possible to prevent the flexible screen 100 located at the extension area 130 and the display area 110 from being damaged by an external impact.

In one embodiment, the display panel 10 further includes a composite glue layer 400. The composite glue layer 400 is disposed between the display area 110 and the support film 300. The composite glue layer 400 may be foam or a material with elasticity and toughness. It is understood that the area of the composite glue layer 400 may be greater than or equal to the area of the display area 110. The edges of the display area 110 can be buffered by the composite glue layer 400 when impacted. The composite glue layer 400 may prevent the display area 110 from being damaged by compression or local stress impact.

In one embodiment, the display panel 10 further includes a cover layer 500. The cover layer 500 is disposed on the surface of the display area 110. The cover layer 500 includes a touch sensing layer 510, a polarizer 520, and a cover 530 sequentially disposed in the display area 110 away from the supporting layer. The touch sensing layer 510 may be used as a touch signal input terminal. The display area 110 may trigger different display patterns according to the sensing signal of the touch sensing layer 510. The polarizer 520 may absorb part of the light to prevent the natural light from affecting the display. The cover 530 may be made of glass material or organic material. The cover 530 may be provided with an ink layer 540 on a side adjacent to the display area 110. The ink layer 540 may be used to block light to enhance display. The ink layer 540 may be formed on the surface of the cap plate 530 by coating.

In one embodiment, the ink layer 540 and the polarizer 520 may be fixed by a first adhesive layer 550. The touch sensing layer and the display area 110 may be fixed by a second adhesive layer 560. The first adhesive layer 550 and the second adhesive layer 560 may be made of an optical adhesive, an organic resin, or the like.

In one embodiment, the display panel 10 further includes a driving unit 610 and a flexible circuit board 620. The driving unit 610 and the flexible circuit board 620 are respectively disposed at intervals in the extension region 130. The driving unit 610 may be configured to receive a control signal sent from a motherboard and input the control signal into the flexible screen 100. The flexible circuit board 620 may be connected to a motherboard and provide power to the motherboard.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the patent. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims

1. A display panel, comprising:

the flexible screen body (100) comprises a display area (110), a bending area (120) and an extension area (130) which are sequentially arranged, wherein the display area (110) and the extension area (130) are arranged in parallel, the bending area (120) comprises a first surface (121) and a second surface (123) which are oppositely arranged, the flexible screen body (100) is bent towards the first surface (121), and the flexible screen body (100) is provided with a flexible substrate;

the support part (200) is clamped between the display area (110) and the extension area (130), the support part (200) comprises a support head (210) and a support main body (240), and the support head (210) is close to the bending area (120);

the hardening layer (220) is arranged on the surface of the supporting head (210), an adhesive layer (230) is coated on the surface of the hardening layer (220), and the supporting head (210) and the first surface (121) are attached together through the adhesive layer (230).

2. The display panel of claim 1, wherein the material of the hardened layer (220) comprises aluminum oxide, ceramic, or an organic gel.

3. The display panel according to claim 2, wherein the first surface (121) is provided with a plurality of grooves (122) at intervals, and the adhesive layer (230) fills the plurality of grooves (122).

4. A display panel as claimed in claim 3, characterized in that the recess (122) has a circular cross-section, the diameter of the recess (122) increasing from the middle of the first surface (121) to both sides of the first surface (121).

5. A display panel as claimed in claim 3, characterized in that the inner wall of the recess (122) is provided with a burr (124), and the adhesive layer (230) is attached to the inner wall of the recess (122) by means of the burr (124).

6. The display panel according to claim 1, wherein the thickness of the hardened layer (220) is tapered from a middle portion of the bending region (120) to both sides of the bending region (120).

7. The display panel of claim 2, further comprising a plurality of reinforcing particles (221), the plurality of reinforcing particles (221) being disposed at intervals on a surface of the hardened layer (220) adjacent to the support head (210).

8. The display panel according to claim 1, wherein an end of the supporting head (210) near the bending region (120) is an arc-shaped surface having different radii of curvature.

9. The display panel according to claim 1, further comprising two support films (300) respectively disposed between the display region (110) and the support portion (200), and between the extension region (130) and the support portion (200).

10. The display panel of claim 9, further comprising a composite glue layer (400) disposed between the display area (110) and the support film (300).