CN109817094B - Stretchable display structure and display device - Google Patents
Stretchable display structure and display device Download PDFInfo
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- CN109817094B CN109817094B CN201910016995.3A CN201910016995A CN109817094B CN 109817094 B CN109817094 B CN 109817094B CN 201910016995 A CN201910016995 A CN 201910016995A CN 109817094 B CN109817094 B CN 109817094B
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Abstract
The embodiment of the invention provides a stretchable display structure and a display device, wherein the stretchable display structure comprises: a substrate; a plurality of rotatable members on the substrate, the rotatable members rotating relative to the substrate surface during convex or concave stretching of the substrate; a plurality of pixel modules, and each pixel module is fixed on the rotatable component; conductive wirings electrically connecting adjacent pixel modules. The invention enables concave stretching and convex stretching of a stretchable display structure.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a stretchable display structure and a display device.
Background
An OLED (Organic Light-Emitting Diode) is called an Organic electroluminescent Diode. The OLED display technology has many advantages, such as full solid state, active light emission, high contrast, ultra-thin, low power consumption, fast effect speed, wide working range, and easy implementation of flexible display and 3D display, and is currently applied to many display devices, for example, televisions and mobile devices.
Flexible OLEDs refer to flexible organic light emitting diodes that are manufactured on a flexible substrate and run on the flexible substrate. Compared with conventional rigid OLEDs, flexible OLEDs are more flexible, lighter and thinner, enabling foldable, rollable display technologies that are very widely used.
Disclosure of Invention
The present invention provides a stretchable display structure comprising: a substrate; a plurality of rotatable members on the substrate, the rotatable members rotating relative to the substrate surface during convex or concave stretching of the substrate; a plurality of pixel modules, and each pixel module is fixed on the rotatable component; conductive wirings electrically connecting adjacent pixel modules.
The invention also provides a display device which comprises the stretchable display structure.
Compared with the prior art, the technical scheme provided by the embodiment of the invention has the following advantages:
the invention provides a stretchable display structure with excellent structural performance, wherein a substrate is provided with a plurality of rotatable parts, pixel modules are fixed on the rotatable parts, and the rotatable parts rotate relative to the surface of the substrate in the process of carrying out convex stretching or concave stretching on the substrate, so that the pixel modules are driven to rotate relative to the surface of the substrate, and the concave stretching or convex stretching of the stretchable display structure is realized; moreover, the stretching of the pixel module is not limited by the substrate, so that the stretching size and the stretching direction of the pixel module are improved; in addition, the conductive wiring pair the upset of pixel module plays certain inhibitory action, is favorable to the balance the rotation direction of pixel module changes, avoids pixel module too to gather together or too turn up, can prevent pixel module pivoted angle is too big and reduce pixel module's rate of rotation to reduce the vision sense organ that shows the distortion and promote tensile in-process and experience. Therefore, the invention ensures that the stretchable display structure has good display effect while realizing convex stretching and concave stretching of the stretchable display structure.
In addition, the rotatable part includes the spherical rotating part that can rotate for the base plate surface, and pixel module is fixed in on the spherical rotating part, just pixel module is located on the tangent plane of spherical rotating part, and in the tensile or concave surface tensile process of convex surface, pixel module is located on the tangent plane of spherical rotating part all the time, therefore pixel module with the spherical rotating part crosses the radius of tangent plane is perpendicular all the time to be favorable to further visual sense organ experience in the tensile process of promotion.
In addition, the rotatable part is including being fixed in unable adjustment base on the base plate, and spherical rotating part is located in unable adjustment base, in tensile process, the spherical rotating part is in rotatory route in the unable adjustment base is simple, makes the rotatory angle of spherical rotating part can be better follows the tensile angle of base plate.
In addition, the fixed base part is embedded into the substrate, and compared with the fact that the conductive wiring between the adjacent pixel modules has a fixed length, the scheme that the fixed base part is embedded into the substrate is adopted, so that the maximization of the change of the stretching angle of convex stretching or concave stretching of the substrate can be favorably realized, the maximization of the stretching angle of spherical stretching is realized while the length of the conductive wiring is not required to be increased, the RC delay effect is reduced, and the display uniformity of the stretchable display structure is improved.
In addition, the conductive wiring is bent, and the conductive wiring can be effectively prevented from being broken in the stretching process.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
FIG. 1 is a schematic diagram of a stretchable display screen;
FIG. 2 is a schematic cross-sectional view illustrating a stretchable display structure according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the stretchable display structure of FIG. 2 implementing convex stretching;
fig. 4 is a schematic diagram of the stretchable display structure shown in fig. 2 for realizing concave stretching.
Detailed Description
Referring to fig. 1, fig. 1 is a schematic structural diagram of a stretchable display panel, a structure of a current stretchable display panel mainly includes an island bridge structure, a substrate has a plurality of pixel structures 10, the plurality of light-emitting pixel structures 10 serve as islands, adjacent pixel structures 10 are electrically connected by using a conductive line 20, the conductive line 20 is further disposed in the pixel structures 10, and the conductive line serves as a bridge, wherein the conductive line 20 is S-shaped, and for a plurality of pixel structures 10 in a same row, the plurality of conductive lines 20 form a complete conductive line electrically connected to each other, and for a plurality of pixel structures in a same column, the plurality of conductive lines 20 form a complete conductive line electrically connected to each other.
The stretchable display screen can realize plane stretching and is difficult to realize spherical stretching.
The invention provides a stretchable display structure, which comprises a rotatable part positioned between a substrate and a pixel module; conductive wirings electrically connecting adjacent pixel modules. The invention improves the stretching display effect while realizing the stretching of the spherical surface.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in various embodiments of the invention, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.
Fig. 2 is a schematic cross-sectional view illustrating a stretchable display structure according to an embodiment of the present invention.
Referring to fig. 2, the present embodiment provides a stretchable display structure including: a substrate 100; a plurality of rotatable members 101 on the substrate 100, wherein the rotatable members 101 rotate relative to the surface of the substrate 100 during convex stretching or concave stretching of the substrate 100; a plurality of pixel modules 102, and each pixel module 102 is fixed on a rotatable member 101; the conductive wiring 103 of the adjacent pixel module 102 is electrically connected.
The stretchable display structure provided in the present embodiment will be described in detail below with reference to the accompanying drawings.
The material of the substrate 100 is a material having elasticity and ductility. The material of the substrate 100 includes Polyethylene (PE), polypropylene (PP), Polystyrene (PS), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or Polyimide (PI). The substrate 101 may also be an ultra-thin glass substrate, the thickness of which is less than or equal to 50 μm.
The pixel modules 102 are used to display luminescence as islands in a stretchable display structure; the conductive wiring 103 is used to electrically connect adjacent pixel modules 102 as a bridge in the stretchable display structure. In this embodiment, the plurality of pixel modules 102 are distributed on the substrate 100 in an array, and the plurality of pixel modules 102 include a plurality of rows of pixel modules 102 arranged along an X (not shown) direction and a plurality of columns of pixel modules 102 arranged along a Y (not shown) direction, where the X direction is perpendicular to the Y direction.
Correspondingly, the plurality of rotatable members 101 are also arranged in an array on the substrate 100, and the rotatable members 101 include a plurality of rows of rotatable members 101 arranged in the X direction and a plurality of rows of rotatable members 101 arranged in the Y direction.
It should be noted that, in this embodiment, for convenience of illustration and description, only two pixel modules 102 are shown in fig. 2.
In the process of stretching the substrate 100 in a convex or concave manner, the rotatable component 101 rotates relative to the surface of the substrate 100, so as to drive the pixel module 102 fixed on the rotatable component 101 to rotate relative to the substrate 100, thereby implementing the concave-convex stretching display of the stretchable display structure, that is, enabling the stretchable display structure to implement the spherical stretching purpose.
The surface of the substrate 100 facing the pixel module 102 is the front surface of the substrate 100, and the concave surface stretching refers to a stretching process in which the front surface of the substrate 100 is changed into a concave surface; the convex stretching refers to a stretching process in which the front surface of the substrate 100 becomes convex.
Specifically, during the convex stretching process of the substrate 100, the rotatable member 101 is rotated and turned outwards towards two sides, so as to drive the pixel module 102 to be turned outwards towards two sides correspondingly, thereby realizing the convex display of the stretchable display structure. In addition, as the conductive wiring 103 is arranged between the adjacent pixel modules 102, the conductive wiring 103 can limit the rotation angle of the pixel modules 102 to a certain extent, so that the problem that the outward flip angle of the pixel modules 102 is too large is solved, and the pixel modules 102 are prevented from being turned outwards too much; also, the conductive wiring 103 can reduce the rotation rate of the pixel module 102, so that the inversion rate of the pixel module 102 is moderate during convex stretching. From this, this embodiment is favorable to reducing the tensile in-process display distortion of convex surface, promotes the tensile in-process display visual effect of convex surface.
When the substrate 100 is concavely stretched, the rotatable component 101 rotates and turns inwards, so as to drive the pixel module 101 to correspondingly turn inwards along with the rotatable component 101, thereby realizing the concave display of the stretchable display structure. In addition, as the conductive wiring 103 is arranged between the adjacent pixel modules 102, the conductive wiring 103 can limit the rotation angle of the pixel modules 102 to a certain extent, so that the problem that the inward flip angle of the pixel modules 102 is too large is solved, and the pixel modules 102 are prevented from being gathered too much; also, the conductive wiring 103 can reduce the rotation rate of the pixel module 102, so that the inversion rate of the pixel module 102 is moderate during concave stretching. Therefore, the display distortion in the concave surface stretching process is reduced, and the display visual effect in the concave surface stretching process is improved.
The conductive wiring 103 has a curved shape in a direction parallel to the surface of the substrate 100. The benefits of such an arrangement include: since the conductive wirings 103 are bent, the conductive wirings 103 have a stretchable margin, and thus when the substrate 100 is stretched convexly, the lines of the S-shaped conductive wirings 103 are stretched, thereby effectively avoiding the problem that the conductive wirings 103 are broken in the stretching process, and being beneficial to increasing the distance between the adjacent pixel modules 102 in the stretched state. Note that, for convenience of illustration and explanation, the conductive wirings 103 are illustrated in a straight line shape in fig. 2.
In this embodiment, the conductive wiring 103 has an S-shaped strip shape in a direction parallel to the surface of the substrate 100.
The rotatable member 101 includes a spherical rotating portion 221, the spherical rotating portion 221 is rotatable with respect to the surface of the substrate 100, and the pixel module 102 is fixed on the spherical rotating portion 221. The spherical rotating portion 221 is beneficial to driving the pixel module 102 to turn over in a smooth transition manner when rotating relative to the surface of the substrate 100, so that distortion of a display image is avoided, and user experience is improved.
In this embodiment, the spherical rotating portion 221 is a solid ball, and the stability of the spherical rotating portion 221 of the solid ball is high, which is beneficial to improving the stability of the spherical rotating portion 221 and preventing the deformation problem of the spherical rotating portion 221 caused by the impact after the convex surface stretching or the concave surface stretching for many times. In other embodiments, the spherical rotating portion may also be a hollow sphere.
In this embodiment, a contact point is formed between the pixel module 102 and the spherical rotation portion 221, and a top surface of the pixel module 102 is perpendicular to a radius of the spherical rotation portion 221 passing through the contact point. This has the advantage that the top surface of the pixel module 102 is always perpendicular to the radius of the spherical rotation part 221 passing through the contact point during the convex stretching or concave stretching process, which is beneficial to improve the visual and sensory experience of the user.
The rotatable member 101 is a cardan shaft member; the universal shaft member includes: a fixing base 222 fixed on the surface of the substrate 100, wherein the spherical rotating part 221 is disposed in the fixing base 222. In the universal shaft assembly, the spherical rotating portion 221 can rotate within the fixing base 222 along any angle, so that the pixel module 102 fixed on the spherical rotating portion 222 can rotate along any angle, thereby realizing the concave stretching or convex stretching of the stretchable display structure.
In the convex stretching or concave stretching process of the substrate 100, the rotation angle of the spherical rotating part 221 is greater than the stretching angle of the substrate 100, so that the stretching direction and the stretching size of the pixel module 102 are no longer limited by the stretching direction and the stretching size of the substrate 100, which is beneficial to increasing the maximum stretching amount of the pixel module 102 and increasing the stretching direction of the pixel module 102.
In this embodiment, the shape of the fixing base 222 is an arc, and the shape of the fixing base 222 matches the shape of the spherical rotating portion 221, so as to ensure that the spherical rotating portion 221 can rotate in the fixing base 222, and reduce the resistance from the fixing base 222 to the spherical rotating portion 221 in the rotating process. In other embodiments, the shape of the fixing base may be other shapes, so as to protect the spherical rotating part from rotating relative to the fixing base during the convex stretching or the concave stretching.
In order to prevent the spherical rotation part 221 from falling off from the fixing base 222 during the stretching process, in the present embodiment, the opening area of the fixing base 222 having the arc shape is smaller than the large circular area of the spherical rotation part 221. The great circle means a circle obtained by intersecting a plane passing through the center of the spherical surface of the spherical rotating portion 221 with the spherical surface of the spherical rotating portion 221, and the center of the great circle coincides with the center of the spherical surface of the spherical rotating portion 221.
In this embodiment, the radius of the spherical rotating part 221 is equal to the inner diameter of the fixing base 222. In other embodiments, in order to reduce the resistance of the fixing base to the spherical rotating portion, the radius of the spherical rotating portion may be smaller than the inner diameter of the fixing base.
The ratio of the surface area of the top of the pixel module 102 to the area of the large circle of the spherical rotating part 221 should not be too large or too small. For a stretchable display structure having an equal number and an equal size of spherical rotation sections 221, if the ratio is too small, the pixel density in the stretchable display structure is too small; if the ratio is too large, the area of the corresponding single pixel module 102 is large, and the rotatable range of the pixel module 102 is easily limited. For this reason, in the present embodiment, the ratio between the area of the top surface of the pixel module 102 and the area of the large circle of the spherical rotation portion 221 is greater than or equal to 1 and less than or equal to 1.5, and within this ratio range, the pixel module 102 is ensured to have a larger rotatable range while ensuring that the stretchable display structure has a larger pixel density.
In the universal shaft component, the shape and the structure of the spherical rotating part 221 are simple, and the rotating direction of the spherical rotating part 221 can timely follow the stretching degree of the response substrate 100 in the stretching process, so that the matching degree between the rotating angle of the pixel module 102 and the stretching degree of the substrate 100 is improved. In this embodiment, the fixing base 222 is partially embedded in the substrate 100, and when the substrate 100 is stretched by a certain angle, it is beneficial to maximize the rotation angle of the spherical rotating portion 221 located in the fixing base 222 under the influence of the substrate 100, that is, to maximize the change value of the stretching angle of the pixel module 102 under the influence of the substrate 100, so that even if the substrate 100 is stretched by a small angle, the stretching angle of the pixel module 102 is relatively large, thereby further reducing the influence of the limitation of the stretching angle and direction of the pixel module 102 on the stretching angle and direction of the substrate 100.
Moreover, compared with the case that the conductive wires 103 between the adjacent pixel modules 102 have a fixed length, the scheme that the fixing base 222 is partially embedded into the substrate 100 is beneficial to maximizing the variation of the stretching angle of the pixel modules 102 capable of convex stretching or concave stretching, so that the stretching angle of spherical stretching is maximized without increasing the length of the conductive wires 103, the RC delay effect is reduced, and the display uniformity of the stretchable display structure is improved.
It should be noted that, in other embodiments, the fixing base can also be disposed on the surface of the substrate.
Fig. 3 is a schematic structural view of the stretchable display structure in fig. 2 implementing convex stretching, and fig. 4 is a schematic structural view of the stretchable display structure in fig. 2 implementing concave stretching.
Referring to fig. 3, during the convex stretching process of the substrate 100, the front surface of the substrate 100 becomes convex, the spherical rotation part 221 in the rotatable part 101 rotates along the direction AA1, so as to drive the adjacent pixel modules 102 to turn outwards, and the lines of the conductive wirings 103 are stretched, thereby realizing the convex stretching of the stretchable display structure. In addition, in the process that the pixel module 102 is turned outwards towards two sides, the conductive wiring 103 has a certain tensile force effect on the pixel module 102, so that the turning-outwards angle of the pixel module 102 can be prevented from being too large, the turning-outwards rate of the pixel module 102 towards two sides can be reduced, the display distortion is reduced, and the visual and sensory experience in the convex stretching process can be improved.
In addition, in the process that the pixel module 102 is turned outwards, the pixel module 102 is always located on the tangential plane of the spherical rotating part 221, which is beneficial to further improving the visual and sensory experience.
Referring to fig. 4, during the concave stretching process of the substrate 100, the front surface of the substrate 100 becomes concave, the spherical rotation part 221 in the rotatable component 101 rotates along the direction BB1, so as to drive the adjacent pixel modules 102 to turn inwards, and the lines of the conductive wiring 103 are compressed, thereby realizing the concave stretching of the stretchable display structure. In addition, in the process of turning the pixel module 102 to the inside, the conductive wiring 103 has a certain thrust effect on the pixel module 102, so that the pixel module 102 can be prevented from being turned to the inside by an excessively large angle, the rate of turning the pixel module 102 to the inside can be reduced, and the display distortion can be reduced, so that the visual and sensory experience can be improved in the concave stretching process.
In addition, in the process of turning the pixel module 102 inward, the pixel module 102 is always located on the tangent plane of the spherical rotating portion 221, which is beneficial to further improving the visual and sensory experience.
The pixel module 102 includes at least one light emitting pixel unit and at least one pixel driving circuit unit electrically connected to the light emitting pixel unit, and the conductive wires 103 are electrically connected to the pixel driving circuit unit to provide driving signals to the pixel driving circuit unit to make the light emitting pixel unit in different operating states, where the driving signals may be at least one of data signals or scanning signals, and accordingly, the conductive wires 103 include at least one of data lines or scanning lines.
In the present embodiment, taking the plurality of conductive wirings 103 including data lines and scan lines as an example, the conductive wirings 103 include: first conductive wirings electrically connected to each row of adjacent pixel modules 102, the first conductive wirings serving as scan lines for providing scan signals to the pixel driving circuit units; and the second conductive wirings of each column of adjacent pixel modules 102 are electrically connected and used as data lines to provide data signals for the pixel driving circuit units.
It should be noted that, in other embodiments, the conductive wirings may also be only data lines, or only scan lines.
In this embodiment, the pixel module 102 is an OLED pixel module, and correspondingly, the light-emitting pixel unit is an OLED light-emitting pixel unit.
It should be noted that, in other embodiments, the pixel module may also be a Micro LED pixel module, and the corresponding light-emitting pixel unit is a Micro LED light-emitting pixel unit, or the pixel module may also be an LCD pixel module, and the corresponding light-emitting pixel unit is an LCD light-emitting pixel unit.
In this embodiment, the stretchable display structure is a stretchable OLED structure. In other embodiments, the stretchable structure may also be a stretchable LCD structure or a stretchable Micro LED structure. Correspondingly, the embodiment of the invention also provides a display device, and the display device comprises the stretchable display structure. The display device can be a product or a component with a television function, such as a mobile phone, a tablet computer, a television, a display, a digital photo frame or a navigator. The display device can realize convex stretching or concave stretching.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A stretchable display structure, comprising:
a substrate;
a plurality of rotatable members on the substrate, the rotatable members rotating relative to the substrate surface during convex or concave stretching of the substrate;
a plurality of pixel modules, and each pixel module is fixed on the rotatable component;
conductive wirings electrically connecting adjacent pixel modules.
2. A stretchable display structure according to claim 1, wherein the rotatable member comprises: the pixel module comprises a fixing base fixed on the substrate and a spherical rotating part borne in the fixing base, wherein the spherical rotating part can rotate relative to the surface of the substrate, and the pixel module is fixed on the spherical rotating part.
3. A stretchable display structure according to claim 2, wherein the pixel module has a contact point with the spherical rotation portion, and the pixel module top surface is perpendicular to a radius of the spherical rotation portion passing through the contact point.
4. A stretchable display structure according to claim 2, wherein a ratio between the pixel module top surface area and the great circle area of the spherical rotation section is greater than or equal to 1 and less than or equal to 1.5.
5. A stretchable display structure according to claim 4, wherein the cross-sectional shape of the fixing base in a direction perpendicular to the substrate surface is a circular arc.
6. A stretchable display structure according to claim 5, wherein the opening area of the fixing base is smaller than or equal to the large circular area of the spherical rotation part.
7. A stretchable display structure according to claim 4, wherein the fixed base portion is embedded within the substrate.
8. A stretchable display structure according to claim 1, wherein the conductive wiring is shaped as a meander.
9. A stretchable display structure according to claim 1, wherein the pixel module comprises at least one light emitting pixel unit and at least one pixel driving circuit unit electrically connected to the light emitting pixel unit, the pixel driving circuit unit being electrically connected to the conductive wiring.
10. A display device comprising a stretchable display structure according to any of claims 1-9.
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| CN109904338B (en) * | 2019-01-10 | 2021-09-03 | 云谷（固安）科技有限公司 | Display screen body and display device |
| CN110796957B (en) * | 2019-11-26 | 2022-01-04 | 武汉华星光电半导体显示技术有限公司 | Flexible display panel and display device |
| CN113888965B (en) * | 2020-08-21 | 2023-09-26 | 友达光电股份有限公司 | Stretching display |
| CN112053632B (en) * | 2020-09-16 | 2022-07-29 | 京东方科技集团股份有限公司 | Display device and manufacturing method thereof |
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| JP5148259B2 (en) * | 2007-12-14 | 2013-02-20 | 株式会社 東北テクノアーチ | Processing equipment |
| EP2255378B1 (en) * | 2008-03-05 | 2015-08-05 | The Board of Trustees of the University of Illinois | Stretchable and foldable electronic devices |
| EP2346108A1 (en) * | 2010-01-15 | 2011-07-20 | Nederlandse Organisatie voor toegepast -natuurwetenschappelijk onderzoek TNO | Foil shaped electro-optical product, semi-finished product and method and apparatus for manufacturing the same |
| CN202816916U (en) * | 2012-10-10 | 2013-03-20 | 矽力杰半导体技术(杭州)有限公司 | Inversion packaging device |
| US9841548B2 (en) * | 2015-06-30 | 2017-12-12 | Apple Inc. | Electronic devices with soft input-output components |
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| CN106875850A (en) * | 2017-04-18 | 2017-06-20 | 京东方科技集团股份有限公司 | A kind of flexible display screen and its deformation driving method, display device |
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