CN117831406A - Display panel and display device - Google Patents

Abstract

The invention relates to a display panel, which comprises a display area, a binding area and a bending area positioned between the display area and the binding area, wherein the bending area bends to enable the binding area to be positioned on the backlight side of the display area, the edge of the display panel comprises a first part which is arc-shaped, the first part corresponds to one side of the display panel, on which the bending area is arranged, the boundary between the display area and the bending area is arc-shaped, and in a bending state, the outer surface of the bending area is a space curved surface with a positive Gaussian curvature.

Description

Display panel and display device

Technical Field

The invention relates to the technical field of manufacturing of display products, in particular to a display panel and a display device.

Background

The conventional display is mainly rectangular, and the area with the distribution of light emitting pixels is called an effective display area, and the area only for placing conductive leads and other necessary parts of the display is called an inactive display area. Leads and portions of the pixel drive circuitry are typically placed around the active display area to ensure maximum pixel density in the pixel area.

In order to increase the proportion of the viewing area of the display, only the portion serving as the lead of the driving circuit is fixed to the back of the display by reverse folding. The arc edge display, such as a round watch, is difficult to achieve significant screen duty cycle improvement by applying the circuit area reverse folding technique.

Disclosure of Invention

In order to solve the technical problems, the invention provides a display panel and a display device, which solve the problem of low screen occupation ratio of a display device of the display panel with arc edges.

In order to achieve the above purpose, the technical scheme adopted by the embodiment of the invention is as follows: the utility model provides a display panel, includes the display area, binds the district and is located the display area with bind the district between the district and buckle the district, buckle the district and make the binding the district is located the back light side of display area, display panel's edge is including the first part of shape for arc, first part corresponds display panel sets up one side of buckling the district, the display area with the boundary between the district of buckling is the arc, under the state of buckling, buckle the district surface and be the space curved surface that gaussian curvature is positive number.

Optionally, the bending area is provided with a hollowed pattern, and the hollowed pattern includes a plurality of hollowed holes.

Optionally, the bending region has a bending axis extending along an extending direction of a boundary between the display region and the bending region, and the hollowed-out hole is a bar-shaped through hole extending along the extending direction of the bending axis.

Optionally, the hollowed pattern includes a plurality of hollowed portions arranged side by side along a first direction perpendicular to an extending direction of the bending shaft, each hollowed portion includes a plurality of hollowed holes, a connecting portion is arranged between two adjacent hollowed holes in each hollowed portion, and a projection of the connecting portion in the first direction is located on the corresponding hollowed hole of the adjacent hollowed portion.

Optionally, in two adjacent rows of the hollowed-out parts in the hollowed-out pattern, one row of the hollowed-out parts is provided with a first sub-hollowed-out part, the other row of hollowed-out parts is provided with hollowed-out holes corresponding to the first sub-hollowed-out part, and the projection of the first sub-hollowed-out part in the first direction is positioned at the center point of the first sub-hollowed-out hole.

Optionally, the fretwork pattern includes two first edges that follow the extending direction of bent axle relatively sets up, and is listed as many fretwork portion includes the first sub-fretwork portion and the second sub-fretwork portion that the interval set up, first sub-fretwork portion is close to first edge the fretwork hole does not run through first edge, second sub-fretwork portion is close to first edge the fretwork hole runs through first edge sets up.

Optionally, the hollowed pattern includes two first edges that are oppositely arranged along the extending direction of the bending shaft, and each row of hollowed holes of the hollowed portion, which are close to the first edges, penetrate through the first edges.

Optionally, the strip-shaped through hole comprises two ends arranged along the extending direction of the strip-shaped through hole, and the ends are round ends.

Optionally, the hollowed-out hole is a rectangular through hole or a circular through hole.

Optionally, a boundary between the inflection region and the binding region is a straight line.

Optionally, the boundary between the bending region and the binding region is arc-shaped, and the bending direction of the boundary between the bending region and the binding region is the same as or opposite to the bending direction of the boundary between the display region and the bending region.

Optionally, the binding area has a first edge far from one side of the bending area, and the first edge is a straight line.

Optionally, the binding area has a first edge far from one side of the bending area, the first edge is arc-shaped, and the bending direction of the first edge is the same as or opposite to the bending direction of the boundary between the display area and the bending area.

Optionally, in the bending state, a hard filling layer is filled inside the bending region.

The embodiment of the invention also provides a display device which comprises the display panel.

The beneficial effects of the invention are as follows: under the bending state, the bending area is a space curved surface with positive Gaussian curvature, and the narrow frame is realized when the boundary between the bending area and the display area is arc-shaped.

Drawings

FIG. 1 is a schematic diagram of a display panel according to the related art;

FIG. 2 is a schematic diagram showing a display effect of the display panel of FIG. 1;

FIG. 3 is a schematic diagram showing a bending region of the display panel of FIG. 1 in a bent state;

FIG. 4 is a second schematic diagram showing a bending region of the display panel of FIG. 1 in a bent state;

FIG. 5 is a schematic diagram of a second display panel according to the related art;

FIG. 6 is a schematic diagram showing a display effect of the display panel of FIG. 5;

FIG. 7 is a schematic diagram of a display panel according to an embodiment of the invention;

FIG. 8 is a schematic diagram showing a bending region of a display panel in a bending state according to an embodiment of the invention;

FIG. 9 is a schematic diagram showing a display effect of a display panel according to an embodiment of the present invention;

FIG. 10 is a second schematic diagram showing a bending region of the display panel in a bending state according to an embodiment of the invention;

FIG. 11 is a schematic diagram showing a second structure of a display panel according to an embodiment of the invention;

fig. 12 shows a third schematic structural diagram of a display panel according to an embodiment of the present invention;

FIG. 13 is a schematic diagram showing a hollow pattern according to an embodiment of the invention;

FIG. 14 is a second schematic diagram of a hollowed-out pattern according to an embodiment of the invention;

FIG. 15 is a third schematic view of a hollowed-out pattern according to an embodiment of the invention;

FIG. 16 is a schematic view of a display device according to an embodiment of the present invention;

FIG. 17 shows a schematic view with positive curvature;

FIG. 18 shows a schematic view with zero curvature;

fig. 19 shows a schematic view with negative curvature.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the invention, fall within the scope of protection of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 1-6, fig. 1 and 5 are schematic diagrams of a display area and a line distribution area in the conventional technical scheme, along a direction away from the display area 1, the line distribution area 2 includes a bending area 21 and a binding area 22, a boundary between the display area 1 and the bending area 21 in fig. 1 is a straight line, a boundary between the display area 1 and the bending area in fig. 5 is an arc shape, fig. 1 and 5 are compared, the display area in fig. 5 is a circle, so that the shape of the display area is consistent with the overall shape of the display panel, fig. 2 is a schematic diagram of a display effect of the display panel in fig. 1, fig. 6 is a view of a display effect of the display panel in fig. 5, fig. 2 and 6 are compared, a width of a non-display area 3 in fig. 2 is larger than a width of the non-display area 3 in fig. 2, fig. 3 and 4 are schematic diagrams of the display panel in a bending state, the display panel in fig. 1 and fig. 5 is a circle, the display panel includes a display area, a binding area and a region between the display area and the binding area, the bending area is a circle, so that the bending area is located on the bending side of the display area is consistent with the whole shape of the display area, and the bending area is a plane, so that the bending area is not required to be formed in the bending area (the straight line is a surface of the bending area in fig. 1 and the surface is a curve, and the bending area is required to be formed in the bending area in the surface is a surface of the bending area and a curve); or increasing the width of the bending region in the first direction (the direction from the display region to the bending region in the unfolded state), referring to fig. 5 and 6, the width of the bezel is increased, that is, it is difficult to simultaneously implement a circular display region and a narrow bezel for a display panel having an arc-shaped edge in a conventional bending scheme.

Referring to fig. 7-15, in view of the above problems, the present embodiment provides a display panel including a display area 1, a binding area 22, and a bending area 21 located between the display area 1 and the binding area 22, the bending area 21 bending such that the binding area 22 is located on a backlight side of the display area 1, an edge of the display panel includes a first portion having an arc shape, the first portion corresponding to a side of the display panel where the bending area 21 is located, a boundary (refer to a first boundary 201 in fig. 11-12) between the display area 1 and the bending area 21 is arc-shaped, and an outer surface of the bending area 21 is a space curved surface having a gaussian curvature as a positive number in a bending state.

In the flattened state (state when the bending region 21 is not bent), the bending region 21 has a first surface on the light emitting side of the display region, and in the bent state, the first surface serves as the outer surface to form a space curved surface having a positive gaussian curvature.

The display panel sets up the edge portion of one side of buckling district 21 is the arc, display area 1 with the boundary between the district 21 of buckling is the arc, buckling district 21 is the space curved surface that gaussian curvature is positive under the bending state, at this moment, can guarantee buckling form of buckling district 21, guarantee buckling district 21's holistic smoothness, avoid distributing in the circuit on the district 21 of buckling is broken because of buckling district 21 takes place the condition such as fold to guaranteed that display area 1 corresponds the edge of the part of district 21 of buckling is the arc, guaranteed narrow frame (need not to increase buckling district 21 can realize in keeping away from the width of the direction of display area 1 the buckling of district 21 simultaneously.

Fig. 3 and fig. 4 are schematic diagrams of the bending region 21 of the display panel of fig. 1 in a bending state, fig. 8 and fig. 10 are schematic diagrams of the bending region 21 of the display panel of the present embodiment in a bending state, fig. 7 is a schematic diagram of the display region 1 and the line distribution region 2 of one implementation of the present embodiment, fig. 2 and fig. 9 are compared, in the case of the same frame width, the boundary between the display region 1 and the bending region 21 in fig. 1 is in a straight line shape, and the boundary between the display region 1 and the bending region 21 in fig. 7 is in an arc shape, so that the corresponding display edge of the display region 1 is ensured to be in an arc shape. In contrast to fig. 6 and fig. 9, in the case where the edge of the display area 1 corresponding to the side of the bending area 21 is curved, that is, the boundary between the display area 1 and the bending area 21 is curved, the width of the non-display area 1 in fig. 6 is greater than the width of the non-display area 1 in fig. 9, and the above scheme of the embodiment realizes a narrow frame.

It should be noted that, the edge portion of the display panel on the side where the bending region 21 is disposed is arc-shaped, and the shape of the other edge portion of the display panel where the bending region 21 is not disposed may be arc-shaped, straight line, etc., and the shape is not limited herein, for example, the whole edge of the display panel is circular.

It should be noted that the arc may be a part of a circle and a part of an ellipse, but is not limited thereto.

Note that, regarding the gaussian curvature: how to describe a curved surface, gaussian gives a discrimination method-Gaussian curvature. By definition, we can make an infinite number of lines through a point on the surface, assuming that the convex curvature of these lines is positive (the more convex curvature is greater), referring to fig. 17, straight is 0, referring to fig. 18, concave is negative (the more concave curvature is smaller), referring to fig. 19. Gaussian curvature = max { curvature of all lines }, min { curvature of all lines }, and lines corresponding to maximum curvature and minimum curvature (also called principal curvature) are orthogonal.

For a sheet of flat paper, the line passing at any point on the paper is a straight line, so the gaussian curvature is zero (0= 0*0); when we bend the paper into a cylindrical or conical surface, the gaussian curvature is zero (0=positive number x 0) although the form changes from a flat surface to a curved surface. For example, the display panel of fig. 1-3 has a gaussian curvature of zero when the bending region 21 is in a bent state. In summary, we conclude that: a curved surface is bent at will, and the Gaussian curvature of the curved surface is invariable as long as the curved surface is not elongated, compressed or torn, and the Gaussian curvature of the curved surface is invariable, which is the basis for judging whether the curved surface is an expandable curved surface or not, namely, judging whether the Gaussian curvature of the curved surface is zero or not. The bending region 21 in the display panel of fig. 1 and 5 can be unfolded after bending, i.e. it is restored to the unbent state, and the surface area is kept unchanged. However, the bending region 21 in the present embodiment cannot be changed to a planar state in which the surface area is unchanged by simple expansion in a space curved surface bent to have a positive gaussian curvature.

Referring to fig. 11-15, in an exemplary embodiment, the bending region 21 is provided with a hollowed-out pattern, and the hollowed-out pattern includes a plurality of hollowed-out holes 2001.

The hollow pattern ensures the flexibility of the bending area 21, which is beneficial to the deformation of the bending area 21 during bending, namely, the formation of the space curved surface.

In an exemplary embodiment, the bending region 21 has a bending axis extending along an extending direction of a boundary between the display region 1 and the bending region 21, and the hollowed-out hole 2001 is a bar-shaped through hole extending along the extending direction of the bending axis.

The hollow hole 2001 is a bar-shaped through hole extending along the extending direction of the bending shaft, which is beneficial to the stretching deformation of the bending region 21 during bending.

In an exemplary embodiment, the hollowed pattern includes a plurality of hollowed portions arranged side by side along a first direction perpendicular to an extending direction of the bending axis, each hollowed portion includes a plurality of hollowed holes 2001, a connection portion is between two adjacent hollowed holes 2001 in each hollowed portion, and a projection of the connection portion in the first direction is located on the corresponding hollowed hole 2001 of the adjacent hollowed portion.

In an exemplary embodiment, in two adjacent rows of the hollowed-out portions in the hollowed-out pattern, one row of the hollowed-out portions is a first sub-hollowed-out portion, and the hollowed-out hole 2001 corresponding to the first sub-hollowed-out portion on the other row of the hollowed-out portions is a first sub-hollowed-out hole, and the projection of the first sub-hollowed-out portion in the first direction is located at the center point of the first sub-hollowed-out hole.

In an exemplary embodiment, the hollowed pattern includes two first edges that are oppositely disposed along the extending direction of the bending axis, the hollowed portions include a first sub-hollowed portion 10 and a second sub-hollowed portion 20 that are disposed at intervals, the hollowed holes 2001 of the first sub-hollowed portion 10 that are close to the first edge do not penetrate the first edge, and the hollowed holes 2001 of the second sub-hollowed portion 20 that are close to the first edge penetrate the first edge.

In an exemplary embodiment, the hollowed pattern includes two first edges disposed opposite to each other along the extending direction of the bending axis, and the hollowed holes 2001 of each row of the hollowed portions near the first edges are disposed through the first edges.

In an exemplary embodiment, the strip-shaped through hole includes two ends disposed along an extending direction thereof, the ends being rounded ends.

In an exemplary embodiment, the hollowed-out hole 2001 is a rectangular through hole or a circular through hole.

The distribution density of the hollow holes 2001 can be set according to needs, and the number of the hollow holes 2001 can be set according to actual needs.

The size of the hollow hole 2001 may be set according to actual needs, in an embodiment, when the hollow hole 2001 is circular, the diameter of the hollow hole 2001 is 0.01-0.5mm, when the hollow hole 2001 is a bar-shaped through hole, the length of the hollow hole 2001 in the extending direction thereof is 0.01-0.5mm, and the length of the hollow hole 2001 in the direction perpendicular to the extending direction thereof is 0.01-0.5mm.

The border between the display area 1 and the bending area 21 is arc-shaped, the edge of the part of the display area 1 corresponding to the bending area 21 is arc-shaped, when the display panel is circular, the border between the display area 1 and the bending area 21 is arc-shaped, the whole shape of the display area 1 is circular, and a narrow frame (bending of the bending area 21 can be realized without increasing the frame) can be realized. On this basis, the shape of the edge of the side of the bending region 21 away from the display region 1 may be set according to actual needs, that is, the shape of the boundary between the bending region 21 and the binding region 22 may be set according to actual needs, and the shape of the edge of the side of the binding region 22 away from the bending region 21 may also be set according to actual needs.

In an exemplary embodiment, the boundary between the inflection region 21 and the binding region 22 (refer to the second boundary 202 in fig. 11) is a straight line.

In an exemplary embodiment, the boundary between the inflection region 21 and the bonding region 22 (refer to the second boundary 202 in fig. 12) is arc-shaped, and the bending direction of the boundary between the inflection region 21 and the bonding region 22 is the same or opposite to the bending direction of the boundary between the display region 1 and the inflection region 21.

Referring to fig. 11 and 12, in an exemplary embodiment, the binding region 22 has a first edge 203 remote from a side of the inflection region 21, the first edge 203 being a straight line.

In an exemplary embodiment, the binding area 22 has a first edge 203 far from one side of the bending area 21, the first edge 203 is arc-shaped, referring to fig. 7, and the bending direction of the first edge 203 is the same as or opposite to the bending direction of the boundary between the display area 1 and the bending area 21.

In the exemplary embodiment, in the folded state, the inside of the folded region 21 is filled with the hard filler layer 4.

The bending process of the bending region 21 with a positive gaussian curvature is implemented by, in an unfolded state, the bending region 21 having a first surface located on the light-emitting side of the display region 1 and a second surface located on the backlight side of the display region 1, binding the display region 1, the bending region 21 and the binding region 22, fixing the display region 1 and the binding region 22, or fixing the display region 1 and the binding region 22 on a base by a clamping tool or the like, and ensuring that the display region 1 and the binding region 22 are located on the same plane. The hard mold remains to be reused as the hard filler layer 4 so that the bending region 21 is maintained in a preset shape in a bent state.

Referring to fig. 16, an embodiment of the present invention further provides a display device including the display panel 40 described above.

The light-emitting side of the display panel is provided with a cover plate 30, and in a folded state, a hard filling layer 4 is disposed between the binding area 22 and the display area, and it should be noted that, in this embodiment, the drawing is a schematic diagram, and fig. 16 shows a positional relationship of the hard filling layer 4, but a gap exists between the hard filling layer 4 and the folded area 21 shown in fig. 16, but in reality, an end of the hard filling layer 4 near the folded area 21 extends to the folded area 21 and contacts the folded area 21 to fill a portion inside the folded area 21, so as to maintain the folded form of the folded area 21.

It should be noted that the display device may be a flexible OLED display or a flexible micro-LED display, or a display in which other circuit distribution areas are flexible polymer films.

Illustratively, the flexible polymeric membrane layer may be a polyimide PI material.

It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present invention, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the invention, and are also considered to be within the scope of the invention.

Claims (15)

1. The utility model provides a display panel, includes the display area, binds the district and is located the display area with bind the district between the district and buckle the district, buckle the district and make the binding the district is located the back light side of display area, its characterized in that, display panel's edge is including the first part of shape for arc, first part corresponds display panel sets up one side of buckling the district, the display area with the boundary between the district of buckling is the arc, under the state of buckling, the surface of buckling the district is the space curved surface that gaussian curvature is the positive number.

2. The display panel of claim 1, wherein the bending region is provided with a hollowed pattern, and the hollowed pattern comprises a plurality of hollowed holes.

3. The display panel according to claim 2, wherein the bending region has a bending axis extending along an extending direction of a boundary between the display region and the bending region, and the hollowed-out hole is a bar-shaped through hole extending along the extending direction of the bending axis.

4. A display panel according to claim 3, wherein the hollowed pattern comprises a plurality of hollowed portions arranged side by side along a first direction perpendicular to the extending direction of the bending axis, each hollowed portion comprises a plurality of hollowed holes, a connecting portion is arranged between two adjacent hollowed holes in each hollowed portion, and projections of the connecting portions in the first direction are located on the corresponding hollowed holes of the adjacent hollowed portions.

5. The display panel according to claim 4, wherein, in two adjacent rows of the hollow portions in the hollow pattern, one of the hollow portions is a first sub-connecting portion, and the hollow hole corresponding to the first sub-connecting portion on the other row of the hollow portion is a first sub-hollow hole, and the projection of the first sub-connecting portion in the first direction is located at the center point of the first sub-hollow hole.

6. The display panel according to claim 4, wherein the hollowed pattern includes two first edges disposed opposite to each other along an extending direction of the bending axis, the hollowed portions include a first sub-hollowed portion and a second sub-hollowed portion disposed at intervals, the hollowed holes of the first sub-hollowed portion adjacent to the first edge do not penetrate the first edge, and the hollowed holes of the second sub-hollowed portion adjacent to the first edge penetrate the first edge.

7. The display panel according to claim 4, wherein the hollowed pattern includes two first edges disposed opposite to each other along an extending direction of the bending axis, and the hollowed holes of each row of the hollowed portions near the first edges are disposed through the first edges.

8. A display panel according to claim 3, characterized in that the strip-shaped through hole comprises two ends arranged in the direction of extension thereof, the ends being rounded ends.

9. The display panel of claim 2, wherein the hollowed-out hole is a rectangular through hole or a circular through hole.

10. The display panel of claim 2, wherein a boundary between the inflection region and the bonding region is a straight line.

11. The display panel according to claim 2, wherein a boundary between the bending region and the binding region is arc-shaped, and a bending direction of the boundary between the bending region and the binding region is the same as or opposite to a bending direction of the boundary between the display region and the bending region.

12. The display panel of claim 2, wherein the binding region has a first edge distal from a side of the inflection region, the first edge being a straight line.

13. The display panel according to claim 2, wherein the binding region has a first edge far from a side of the bending region, the first edge is arc-shaped, and a bending direction of the first edge is the same as or opposite to a bending direction of a boundary between the display region and the bending region.

14. The display panel according to claim 2, wherein in a folded state, an inner side of the folded region is filled with a hard filling layer.

15. A display device comprising the display panel of any one of claims 1-14.