CN112164331B

CN112164331B - Multi-curved-surface display device

Info

Publication number: CN112164331B
Application number: CN202011097866.0A
Authority: CN
Inventors: 王磊; 孙亮
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2022-05-31
Anticipated expiration: 2040-10-14
Also published as: CN112164331A

Abstract

The application discloses many curved surface display device has an edge area, many curved surface display device includes: a display module assembly and an apron, the display module assembly set up in one side of apron, the display module assembly includes the function rete of a plurality of range upon range of settings the marginal zone is provided with an at least fluting, is corresponding fluting department, many curved surfaces display device still includes: the first sub-bonding layer is arranged between the cover plate and the display module; at least one second sub-adhesive layer arranged between at least two adjacent functional film layers; wherein the first sub-adhesive layer is made of water gel; and the material of the second sub-adhesive layer is water glue.

Description

Multi-curved-surface display device

Technical Field

The application relates to the technical field of display, in particular to a multi-curved-surface display device.

Background

The display is an important medium for man-machine interaction in the modern society, and as the demand of people for man-machine interaction efficiency is continuously improved, the screen occupation ratio of the display also tends to be obviously increased.

The OLED display has the advantages of wide color gamut, high contrast, short response time and the like, and is increasingly applied to the display field. Compared with the traditional LCD and CRT display technologies, the OLED display has outstanding advantages in terms of flexibility and foldability. By utilizing the characteristic of flexibility of the OLED display, the edge of the OLED display can be bent down, and the frame is hidden, so that the screen occupation ratio of the display is greatly improved. Currently, display products with bent left and right borders have been produced. The display product that four frames of upper and lower, left and right side were buckled simultaneously has bigger screen than the left and right product of buckling and accounts for than, and pleasing to the eye degree is also higher. However, because the corners bear great stress when the four curved surfaces are attached, the development difficulty of the four-curved-surface display is obviously higher than that of a left-and-right-bent hyperboloid display.

In view of the above problems, the present invention provides a multi-curved-surface display device.

Disclosure of Invention

The embodiment of the application provides a multi-curved-surface display device, which is provided with an edge area, the multi-curved-surface display device comprises a cover plate and a display module, the display module comprises a plurality of functional film layers which are arranged in a stacked mode, at least one groove is formed in the edge area, and glue is respectively arranged between the cover plate and the display module and at least at the groove between two adjacent functional film layers to achieve splicing; therefore, reflection of the multi-curved-surface display device at an interlayer interface is reduced, light leakage at the splicing position is inhibited, and the light transmitting and emitting capacity of the multi-curved-surface display device is enhanced.

The embodiment of the application provides a multi-curved surface display device, has an edge area, multi-curved surface display device includes: a display module assembly and a apron, display module assembly set up in one side of apron, display module assembly includes the function rete of a plurality of range upon range of settings the marginal zone is provided with an at least fluting, is corresponding fluting department, many curved surfaces display device still includes: the first sub-bonding layer is arranged between the cover plate and the display module; at least one second sub-adhesive layer arranged between at least two adjacent functional film layers; wherein the first sub-adhesive layer is made of water gel; and the material of the second sub-adhesive layer is water glue.

In some embodiments, the slot is an open notch, and the slot is disposed at a corner of the edge region.

In some embodiments, the slot is disposed between a corner and two adjacent corners of the edge region.

In some embodiments, the contour line of the slot has a top surface, and the periphery of the top surface of the slot is provided with an arc-shaped round angle.

In some embodiments, the first sub-adhesive layer is a double-sided tape or a dispensing; the second sub-adhesive layer is double-sided adhesive or dispensing adhesive.

In some embodiments, a side surface of the cover plate facing the display module is concave.

In some embodiments, the display module comprises an array driving layer and a functional control layer, which are stacked, and a layer of the second sub-adhesive layer is disposed between the functional control layer and the array driving layer.

In some embodiments, the functional control layer is disposed between the array driving layer and the cover plate, and one layer of the first sub-adhesive layer is disposed between the cover plate and the functional control layer.

In some embodiments, the array driving layer is a flexible OLED display panel; the functional control layer is at least one of a touch layer or a polarizer.

In some embodiments, the display module is a liquid crystal display module, the display module further includes a backlight module disposed on a side of the array driving layer away from the cover plate, and the array driving layer is a flexible liquid crystal display panel.

The multi-curved-surface display device provided by the embodiment of the application is provided with an edge area, the multi-curved-surface display device comprises a cover plate and a display module, the display module comprises a plurality of functional film layers which are arranged in a stacked mode, at least one groove is arranged in the edge area, the groove is an open notch, and the groove is arranged at the corner of at least two adjacent side edges of the edge area; at the groove, a first sub-bonding layer is arranged between the cover plate and the display module, a second sub-bonding layer is arranged between at least two adjacent functional film layers, the first sub-bonding layer and the second sub-bonding layer are both water adhesives (OCR), and the water adhesives are utilized to realize splicing; the functional film layer comprises an array driving layer and a functional control layer, the array driving layer is a flexible OLED display panel or a flexible LCD display panel, and the functional control layer is at least one of a touch layer or a polarizer; the refractive index of the water gel is closer to that of the array driving layer, the touch layer or the polaroid and the cover plate, so that reflection at an interlayer interface of the multi-curved-surface display device can be reduced, light leakage at a splicing part is inhibited, and the light transmitting and emitting capacity of the multi-curved-surface display device is enhanced.

Drawings

The technical solutions and other advantages of the present application will become apparent from the following detailed description of specific embodiments of the present application when taken in conjunction with the accompanying drawings.

Fig. 1 is a top view of a multi-curved display device according to an embodiment of the present disclosure.

Fig. 2 is a schematic diagram of the multi-curved display device shown in fig. 1 spliced at a slot.

Fig. 3 is a diagram illustrating an interlayer refraction effect of the conventional OLED display device filled with OCA at the groove.

Fig. 4 is a diagram illustrating interlayer refraction effect of filling OCR at the grooves of the multi-curved display device shown in fig. 2.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically, electrically or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Specifically, please refer to fig. 1, fig. 2 and fig. 4, in which fig. 1 is a top view of a multi-curved-surface display device in an embodiment of the present application; FIG. 2 is a schematic view of the multi-curved display device shown in FIG. 1 being tiled at a slot; fig. 4 is a diagram illustrating interlayer refraction effect of filling OCR at the grooves of the multi-curved display device shown in fig. 2. As shown in fig. 1, in the present embodiment, a multi-curved-surface display device is provided, which has flexibility, and is suitable for electronic devices such as mobile phone screens, tablet computer screens, curtain walls, and exhibition windows, and the multi-curved-surface display device has an edge area 20.

As shown in fig. 4, the multi-curved-surface display device includes a display module 100 and a cover plate 200, the display module 100 has flexibility, the display module 100 is disposed on one side of the cover plate 200, and the display module 100 includes a plurality of stacked functional film layers. In this embodiment, a side surface of the cover plate 200 facing the display module 100 is a concave surface, that is, the cover plate 200 is an arc-shaped structure with a central angle not greater than 180 °, the cover plate 200 is used for accommodating the display module 100, and the cover plate 200 and the display module 100 are attached to each other to form the multi-curved-surface display device. In other embodiments, the cover plate 200 may also be a planar structure.

The Cover plate 200 may be selected from any one of a Glass Cover plate (CG) and a 3D Cover plate, and in this embodiment, the Cover plate is selected as a Glass Cover plate, and the Cover plate 200 may also be selected as a transparent Cover plate.

As shown in fig. 1, at least one groove 30 is disposed in the edge region 20 of the display module 100, see fig. 2 and 4, an adhesive layer is filled in the groove 30, the adhesive layer is disposed between the display module 100 and the cover plate 200, and is further disposed between at least two adjacent functional film layers of the display module 100, the adhesive layer is used for splicing the groove 30, and a slit 300 is formed at the spliced position.

In the embodiment of the present application, as shown in fig. 1, the slot 30 is an open notch, the contour line of the slot 30 is an arc shape, and an arc-shaped fillet is arranged on the periphery of the top surface of the slot 30. In this embodiment, the display module 100 is rectangular, the outline of the side edge of the edge region 20 is rectangular, the slot 30 is disposed on the side edge of the edge region 20, and the slot 30 is disposed at the corner of the edge region 20. In this embodiment, the number of fluting 30 is four, the profile line of fluting 30 has top surface 301, top surface 301 periphery of fluting 30 is equipped with the arc fillet, specifically, the profile line of fluting 30 is convex "V type", "V type" has the arc fillet.

In an embodiment of the present application, as shown in fig. 4, the display module 100 includes an array driving layer 101 and a function control layer 102, which are stacked, the function control layer 102 is disposed between the array driving layer 101 and the cover plate 200, and at the position corresponding to the slot 30, the adhesive layer includes a first sub-adhesive layer 201 and a second sub-adhesive layer 202, the first sub-adhesive layer 201 is filled in the slot 30 between the cover plate 200 and the display module 100, and the second sub-adhesive layer 202 is filled in the slot 30 between the function control layer 102 and the array driving layer 101.

In the present application, the first sub-adhesive layer 201 is a double-sided tape or a dispensing; the second sub-adhesive layer 202 is a double-sided tape or a dispensing tape.

As a most preferred embodiment, as shown in fig. 4, the material of the first sub-adhesive layer 201 is water gel (i.e., OCR); the material of the second sub-adhesive layer 202 is water gel (i.e., OCR). The first sub-adhesive layer 201 and the second sub-adhesive layer 202 are respectively set to be water glue, so that the sealing degree between the display module 100 and the cover plate 200 of the multi-curved-surface display device and between the two adjacent functional film layers of the display module 100 can be improved.

It should be further noted that the slots 30 are not in contact with the array driving layer 101 and the functional control layer 102. Equivalently, the edge region 20 of the multi-curved display device is defined as the peripheral region disposed on the array driving layer 101 and the functional control layer 102.

It should be noted that, in this embodiment, the array driving layer 101 is a flexible OLED display panel, and the array driving layer 101 includes a thin film transistor array substrate. And, as a preferred embodiment, the functional control layer 102 is any one of a touch layer or a polarizer.

In other embodiments, the functional control layer 102 includes, but is not limited to, the touch layer or the polarizer, and the functional control layer may further include other functional film layers such as a multi-layer anti-fog layer and a functional sheet, so as to make the performance of the display module 100 better. And further, the first sub-adhesive layer 201 and the second sub-adhesive layer 202 may be disposed between the adjacent antifogging layers and between the antifogging layer and the other functional film layers.

In addition, as shown in fig. 4, the array driving layer 101 further includes a substrate disposed on a side of the array driving layer 101 facing away from the cover plate 200. The substrate comprises an acrylic plate or film and has flexibility.

In this application embodiment, when function control layer 102 is the touch-control layer, the touch-control layer can be for on cell structure, the touch-control layer set up in on the thin film transistor array substrate, the touch-control layer with thin film transistor array substrate connects, and thin film transistor array substrate includes thin film transistor array layer, OLED luminescent layer and film encapsulation layer in proper order, the OLED luminescent layer including form in proper order in positive pole, hole injection layer, hole transport layer, organic luminescent layer, electron transport layer, electron injection layer and the negative pole of thin film transistor array layer top, the film encapsulation layer covers the OLED luminescent layer. In addition, in other embodiments, the touch layer may also have an in-cell structure, that is, the position of the touch layer is replaced by being built in the array driving layer 101, that is, the thin film transistor array substrate. In this embodiment, the array driving layer 101 is equivalent to a flexible imaging device and is used for displaying images, and the touch layer is used for collecting sensing signals and implementing a touch function. The touch layer can be selected from a flexible thin film capacitive touch panel.

In a preferred embodiment, the array driving layer 101 is an OLED display panel, and when the function control layer 102 is a polarizer, since the OLED is self-luminous, the OLED may not need a polarizer like an LCD in theory; however, ambient light will reflect back through the cathode (usually metal) and affect the viewing effect and contrast, and in order to solve the above problem, a polarizer +1/4 λ plate (this is also called circular polarization); when the external light passes through the polarizer, half of the external light cannot pass through, the half of the external light is deflected by 90 degrees with the original light after passing through the 1/4 lambda plate and being reflected, and the reflected light cannot pass through the polarizer, so that the reflection problem is solved, and therefore, when the functional control layer 102 is the polarizer, the effect of reflecting the external light at the cathode is achieved.

In other preferred embodiments, the display module 100 is selected as a liquid crystal display module (LCM), the display module 100 further includes a backlight module 110, the backlight module 110 is disposed on a side of the array driving layer 101 away from the cover plate 200, the array driving layer 101 is a flexible Liquid Crystal Display (LCD) screen, and the function control layer 102 is a polarizer. The backlight module 110 is provided with an LED light source, a light guide plate and an optical film set, wherein the optical film set comprises a reflective sheet, a diffusion sheet and a brightness enhancement sheet.

It should be further noted that, as shown in fig. 3 and fig. 4, fig. 3 is a diagram illustrating an interlayer refraction effect of a conventional OLED display device filled with an OCA at a groove, and fig. 4 is a diagram illustrating an interlayer refraction effect of a multi-curved display device shown in fig. 2 filled with an OCR at a groove. The conventional OLED display device is different from the multi-curved display device described herein in that the materials of the first Adhesive layer 201 and the second Adhesive layer 202 are both OCR, and the conventional multi-curved display device includes a first Adhesive layer 201 ', a second Adhesive layer 202', and both the materials of the first Adhesive layer 201 'and the second Adhesive layer 202' are transparent optical Adhesive (OCA). In addition, different film layers of the multi-curved display device have different optical refractive indexes, and different film layers of the conventional OLED display device have different optical refractive indexes. The refractive index data of the corresponding film layers of the conventional OLED display device are shown in table 1 below.

Material	Thickness of	Refractive index
			Cover Glass	550	1.51
OCA	150	1.47
			TP	50	1.63
POL	147	1.53
			BP	90	1.65

Table 1

As can be seen from table 1 above, and with reference to fig. 3 in succession, in the conventional OLED display device, the conventional OLED display device includes a Back Plate (BP)110, a display Panel (Panel)101, an OCA film layer 201 ', a touch layer (TP)102 or a Polarizer (POL)102, an OCA film layer 202', a Cover plate 200, the refractive indexes of the OCA film layer 201 'and the OCA film layer 202' are 1.47, the refractive index of the Cover plate (Cover Glass)200 is 1.51, the refractive index of the touch layer (TP)102 is 1.63, the refractive index of the Polarizer (POL)102 is 1.53, and the refractive index of the Back Plate (BP)110 is 1.65, so that the refractive indexes of the OCA film layer 201 'and the OCA film layer 202' are lower than the refractive indexes of other film layers of the conventional OLED display device. According to the principle of light reflection and refraction, the larger the difference between the refractive indexes of the adjacent layers of the conventional OLED display device is, the more light is reflected at the interface, and the less light is transmitted. Therefore, in the conventional OLED display device, more light is reflected by the interface of the OCA film layer, and the transmittance and contrast of the film layer of the conventional OLED display device are reduced to some extent.

Compare in conventional OLED display device, if this application many curved surface display device first bond line 201 reaches second bond line 202 fills OCA, rather than filling OCR, the more phenomenon of reflected light takes place for the interface department of OCA rete, promptly, this application above-mentioned phenomenon can be more serious among the many curved surface display device, because the light of OCA rete interface reflection can be followed fluting 30's edge and derived, forms the side light leak, and slit 300 after the concatenation can send obvious stray light, greatly influences this application many curved surface display device's display effect.

Aiming at the problem that filling the OCA in the multi-curved-surface display device can cause poor display effect, in the embodiment of the application, the groove 30 is replaced by an Optical Clear Adhesive (OCA) with a higher refractive index, the typical refractive index of the OCR is 1.51, and the refractive index of the OCR is closer to the cover plate 200 and the film layers such as the touch layer 102.

It should be noted that, as shown in fig. 1, four of the slots 30 on the multi-curved-surface display device are formed by splicing the first adhesive layer 201 and the second adhesive layer 202 with water glue, and then the four-curved-surface OLED display device of the present application is formed, as shown in fig. 2, one of the slots 30 forms the slit 300 after being spliced, and the influence of the slit 300 on breaking the screen integration is reduced by controlling the number, depth and position of the slots 30. In this embodiment, the setting of the slot 30 can realize the screen occupation ratio and the aesthetic degree of the multi-curved-surface display device.

In this embodiment, a water gel (OCR) is filled in the slot 30, specifically, the water gel is respectively filled between the cover plate 200 and the display module 100, and the water gel is filled in the slot 30 between the array driving layer 101 and the functional control layer 101 of the display module 100, because a refractive index of the OCR is closer to a refractive index of the array driving layer 101, the functional control layer 102, i.e., the touch layer or the polarizer, and a refractive index of the cover plate 200, reflection at an interlayer interface of the multi-curved-surface display device can be reduced, light leakage at a spliced position can be suppressed, especially, side light leakage can be reduced, transmission light-emitting capability of the multi-curved-surface display device can be enhanced, and a light refraction path at the interlayer interface of the multi-curved-surface display device is shown in fig. 4.

In the embodiment, the application range and thickness of the OCR film may be adjusted according to design and manufacturing process.

In other embodiments, the shape, number, depth and position of the slots 30 include, but are not limited to, the slots 30 disposed at the corners, depending on the design and requirements of the embodiments of the present application. In some other preferred embodiments, the slots 30 are disposed at the corners of the edge region 20 and between two adjacent corners.

The multi-curved-surface display device provided by the embodiment of the application is provided with an edge area 20, the multi-curved-surface display device comprises a cover plate 200 and a display module 100, the display module 100 comprises a plurality of functional film layers which are arranged in a stacked mode, at least one groove 30 is arranged in the edge area 20, the groove 30 is an open notch, and the groove 30 is arranged at the corner of at least two adjacent side edges of the edge area 20; at the open slot 30, a first sub-adhesive layer 201 is filled between the cover plate 200 and the display module 100, and a second sub-adhesive layer 202 is filled between at least two adjacent functional film layers to realize splicing, where the first sub-adhesive layer 201 and the second sub-adhesive layer 202 are both water adhesives (OCR), the functional film layers include the array driving layer 101 and the functional control layer 102, the array driving layer 101 is a flexible OLED display screen or a flexible LCD display screen, and the functional control layer 102 is at least one of a touch layer or a polarizer; because the refractive index of the water gel is closer to the refractive indexes of the array driving layer 101, the functional control layer 102, namely the touch layer or the polarizer and the cover plate 200, the reflection at the interlayer interface of the multi-curved-surface display device can be reduced, the light leakage of the slit 300 at the splicing position is inhibited, and the light transmitting and emitting capacity of the multi-curved-surface display device is enhanced. In addition, the multi-curved surface display device has flexibility.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The multi-curved-surface display device provided by the embodiment of the present application is described in detail above, and a specific example is applied to illustrate the principle and the implementation manner of the present application, and the description of the above embodiment is only used to help understanding the technical scheme and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims

1. A multi-curved display device having an edge area, the multi-curved display device comprising: a display module and a cover plate, the display module is arranged at one side of the cover plate and comprises a plurality of functional film layers which are arranged in a stacking way,

at least one groove is formed in the edge area, an adhesive layer is filled in the groove, and the adhesive layer is used for splicing the groove;

the adhesive layer includes:

the first sub-bonding layer is arranged between the cover plate and the display module;

at least one second sub-adhesive layer arranged between at least two adjacent functional film layers; wherein the content of the first and second substances,

the first sub-adhesive layer is made of water gel; the material of the second sub-adhesive layer is water gel; the first sub-adhesive layer is double-sided adhesive tape or dispensing; the second sub-adhesive layer is double-sided adhesive tape or dispensing;

the open groove is an open notch and is arranged at the corner of the edge area; the contour line of the slot is provided with a top surface, and the periphery of the top surface of the slot is provided with an arc-shaped fillet; the slots are arranged at the corners of the edge region and between two adjacent corners;

the surface of one side of the cover plate, which faces the display module, is a concave surface.

2. The multi-surface display device of claim 1, wherein the display module comprises an array driving layer and a functional control layer stacked on each other, and a layer of the second sub-adhesive layer is disposed between the functional control layer and the array driving layer.

3. The multi-surface display device according to claim 2, wherein the function control layer is disposed between the array driving layer and the cover plate, and a layer of the first sub-adhesive layer is disposed between the cover plate and the function control layer.

4. The multi-curved display device of claim 2, wherein the array driving layer is a flexible OLED display panel; the functional control layer is at least one of a touch layer or a polarizer.

5. The multi-curved display device as claimed in claim 2, wherein the display module is a liquid crystal display module, the display module further comprises a backlight module disposed on a side of the array driving layer away from the cover plate, and the array driving layer is a flexible liquid crystal display panel.