CN111640377B - Display module and display device - Google Patents

Abstract

The invention discloses a display module and a display device, wherein the display module comprises: a first substrate; a first display panel formed on the first substrate, the first display panel displaying a first portion of an image; a second display panel located under the first substrate, the second display panel not completely overlapping the first display panel; the second display panel displays a second portion of the image; the first display surface of the first display panel and the second display surface of the second display panel are in the same orientation, wherein the first display panel and the second display panel are connected through the first substrate. The invention can improve the performance of the display device, reduce the splicing frame of the display device and ensure that the structure of the display device is more reasonable.

Description

Display module and display device

technical field

The present invention relates to the field of display technology, in particular to a display module and a display device.

Background technique

With the user's demand for large-area display devices, for example, a video wall used to display video in electronic media requires a higher area of the display device, usually multiple small-area display panels can be spliced to create a larger display device.

However, how to realize reasonable splicing of multiple small-area display panels to improve the performance of the display device, such as reducing the splicing frame of the display device, and rationalizing the structure of the display device are urgent problems to be solved.

SUMMARY OF THE INVENTION

The present invention provides a display module and a display device, aiming at improving the performance of the display device, reducing the splicing frame of the display device, and making the structure of the display device more reasonable.

In one aspect, an embodiment of the present invention provides a display module, including: a first substrate, a first display panel formed on the first substrate, and a second display panel located under the first substrate; the first display panel A display panel displays a first part of an image; the second display panel does not completely overlap the first display panel; the second display panel displays a second part of the image; A display surface and a second display surface of the second display panel have the same orientation, wherein the first display panel and the second display panel are connected through the first substrate.

On the other hand, an embodiment of the present invention provides a display device including the above-mentioned display module.

According to the display module and the display device according to the embodiments of the present invention, the display module includes a first substrate, a first display panel formed on the first substrate, and a second display panel located under the first substrate. The display panel displays the first part of the image, and the second display panel displays the second part of the image, so that the first display panel and the second display panel can be spliced with each other to increase the display area of the display module. Further, the first display panel and the second display panel are connected through the first substrate, so that the connection between the first display panel and the second display panel is more compact, compared to using other connection structures to connect the two display panels. , the display module of the embodiment of the present invention has a smaller thickness, which is convenient to realize the lightness and thinness of the display module, and makes the structure of the display device more reasonable. Since the first display panel and the second display panel are not completely overlapped, at this time, the display image of the second display panel is easily blocked by the first display panel. When the first substrate is a transparent substrate, the first substrate can see through The light passing through the second display panel under the first substrate reduces the overlapping area between the first display panel and the second display panel, so as to reduce the splicing frame of the display module.

Description of drawings

Other features, objects and advantages of the present invention will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, wherein the same or similar reference numerals denote the same or similar features, and Figures are not drawn to actual scale.

1 is a schematic top-view structural diagram of a display module provided by an embodiment of the present invention;

2 is a schematic structural diagram of a first display panel and a second display panel provided by an embodiment of the present invention;

3 is a cross-sectional view of the display module shown in FIG. 1 along the M-M direction;

4 is a cross-sectional view of another display module shown in FIG. 1 along the M-M direction;

5 is a cross-sectional view of another display module shown in FIG. 1 along the M-M direction;

Fig. 6 is the structural representation of the display module provided by the comparative example in Fig. 5;

7 is a schematic top-view structural diagram of a first display panel provided by another embodiment of the present invention;

Fig. 8 is the enlarged schematic diagram at Q place in Fig. 1;

9 is a schematic top-view structure diagram of a display module provided by another embodiment of the present invention;

FIG. 10 is a schematic cross-sectional view of a display module provided by another embodiment.

Detailed ways

The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention, and are not configured to limit the present invention. It will be apparent to those skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present invention by illustrating examples of the invention.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element defined by the phrase "comprises" does not preclude the presence of additional identical elements in a process, method, article, or device that includes the element.

It will be understood that, in describing the structure of a component, when a layer or region is referred to as being "on" or "over" another layer or region, it can be directly on the other layer or region, or Other layers or regions are also included between it and another layer, another region. And, if the part is turned over, that layer, one area, will be "below" or "beneath" another layer, another area.

Features and exemplary embodiments of various aspects of the invention are described in detail below. Furthermore, the features, structures or characteristics described below may be combined in any suitable manner in one or more embodiments.

Embodiments of the present invention provide a display module 1000 and a display device. The display module 1000 and the display device according to the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Please refer to FIGS. 1 to 3 together. FIG. 1 is a schematic top view of a display module provided by an embodiment of the present invention, and FIG. 2 is a schematic structural diagram of a first display panel and a second display panel provided by an embodiment of the present invention. 3 is a cross-sectional view of a display module shown in FIG. 1 along the M-M direction. An embodiment of the present invention provides a display module 1000 including a first substrate 11 , a first display panel 100 formed on the first substrate 11 , and a second display panel 200 located under the first substrate 11 .

The first display panel 100 displays the first part of the image, the second display panel 200 does not completely overlap the first display panel 100, the second display panel 200 displays the second part of the image, and the first display surface of the first display panel 100 and The orientations of the second display surfaces of the second display panel 200 are the same, wherein the first display panel 100 and the second display panel 200 are connected through the first substrate 11 .

The first display panel 100 has a first display area AA1 and a first non-display area NA1 disposed on the periphery of the first display area AA1, and the second display panel 200 has a second display area AA2 and disposed on the periphery of the second display area AA2 The second non-display area NA2, the first display panel 100 includes a first substrate 11 and a stacked structure on the first substrate 11, and at least part of the second display area AA2 is different from the stacked structure in the first display panel 100 overlapping, so that the first display area AA1 of the first display panel 100 can display the first part of the image, and the second display area AA2 of the second display panel 200 can display the second part different from the first part of the image. Further, the projections of the first part and the second part of the image in the plane where the upper surface of the first substrate 11 is located are located in different regions, so that the first part and the second part are arranged side by side and superimposed on each other to form a complete image, so as to realize the first part and the second part. The display panel 100 and the second display panel 200 are spliced together to form a display module 1000 with a larger area.

According to the display module 1000 of the embodiment of the present invention, the first display panel 100 displays the first part of the image, and the second display panel 200 displays the second part of the image, so that the first display panel 100 and the second display panel 200 can be spliced with each other to The display area of the display module 1000 is increased. Further, the first display panel 100 and the second display panel 200 are connected through the first substrate 11 , which makes the connection between the first display panel 100 and the second display panel 200 more compact, and facilitates the realization of the display module 1000 Thinning makes the structure of the display device more reasonable. Since the first display panel 100 and the second display panel 200 do not completely overlap, at this time, the display image of the second display panel 200 is easily blocked by the first display panel 100. When the first substrate 11 is a transparent substrate, the A substrate 11 can also transmit light from the second display panel 200 located under the first substrate 11, reducing the overlapping area between the first display panel 100 and the second display panel 200, thereby reducing the display module 1000 stitched borders.

In some embodiments, the first display panel 100 is an organic light-emitting diode (Organic Light-Emitting Diode, OLED) display panel, and the second display panel 200 and the first display panel 100 may be the same type of display panel, that is, the second display panel The panel 200 can also be an organic light emitting diode, so as to improve the display uniformity of the two display panels, thereby improving the display uniformity of the display module 1000 and improving the display effect of the display module 1000 .

The structures of the first display panel 100 and the second display panel 200 will be described below with reference to FIG. 2 . In some embodiments, the first display panel 100 includes a first substrate 11 , a first array layer AR1 , a first planarization layer PL1 , a first pixel definition layer 15 , a first light emitting element layer 12 and a An encapsulation layer 13 . The first array layer AR1 includes a wiring layer and a plurality of pixel circuits. The wiring layer includes scanning lines, data lines and power supply lines, and the plurality of pixel circuits at least include switching transistors, driving transistors and storage capacitors. The wiring layer is connected to a plurality of first sub-pixels PX1 in the first display area AA1 through the plurality of pixel circuits, so as to drive the first sub-pixels PX1 to emit light. The first pixel definition layer 15 includes a first pixel opening. The first light-emitting element layer 12 may include a first light-emitting structure 123, a first electrode 121 and a second electrode 122. The first light-emitting structure 123 is located in the first pixel opening. The electrode 121 is located on the side of the first light emitting structure 123 facing the first substrate 11 , and the second electrode 122 is located on the side of the first light emitting structure 123 away from the first substrate 11 . Wherein, one of the first electrode 121 and the second electrode 122 is an anode, and the other is a cathode.

Specifically, the first light-emitting structure 123 may include a hole injection layer (Hole Injecting Layer, HIL), a hole transport layer (Hole Transporting Layer, HTL), a light-emitting layer, an electron transport layer, and a light-emitting layer, which are sequentially arranged in a direction away from the first substrate 11 . Layer (Electron Transporting Layer, ETL) and Electron Injection Layer (Electron Injecting Layer, EIL). In some embodiments, the first light emitting structure 123 may further include an Electron Blocking Layer (EBL) between the hole transport layer and the light emitting layer, and a hole blocking layer between the light emitting layer and the electron transport layer Layer (Hole Blocking Layer, HBL). In light-emitting display, the hole carriers move to the light-emitting layer along the hole injection layer and the hole transport layer, and the electron carriers move to the light-emitting layer along the electron injection layer, the electron transport layer and the hole blocking layer. The holes and electrons react in the light-emitting layer so that the light-emitting layer emits light.

In some embodiments, the second display panel 200 may include a second substrate 31, a second array layer AR2, a second planarization layer PL2, a second pixel definition layer 35, a second light emitting element layer 32 and The second encapsulation layer 33 . The second light emitting element layer 32 may include a second light emitting structure 323, a third electrode 321 and a fourth electrode 322, the second pixel definition layer 35 includes a second pixel opening, the second light emitting structure 323 is located in the second pixel opening, and the third The electrode 321 is located on the side of the second light emitting structure 323 facing the second substrate 31 , and the fourth electrode 322 is located on the side of the second light emitting structure 323 away from the second substrate 31 . Wherein, one of the third electrode 321 and the fourth electrode 322 is an anode, and the other is a cathode. The structure of the second display panel 200 may be similar to that of the second display panel 200 , and details are not repeated here.

In some embodiments, the first display panel 100 may further include a first polarizing layer 14 , and the second display panel 200 may further include a second polarizing layer 34 to improve the display effect of the display module 1000 . Optionally, in order to satisfy the various functions of the display module 1000, the first display panel 100 may further include a first touch layer, and the second display panel 200 may further include a second touch layer, which is convenient for the display module Group 1000 performs touch operations.

In order to improve the display effect of the display module 1000 and optimize the appearance of the display module 1000 , in some embodiments, the upper surface of the display module 1000 in the area corresponding to the first display panel 100 and the display module 1000 in the area corresponding to the second display module 1000 The upper surfaces in the region where the display panel 200 is located are coplanar. It can be understood that the upper surface of the display module 1000 in the area corresponding to the first display panel 100 and the upper surface of the display module 1000 in the area corresponding to the second display panel 200 can form a continuous plane. , which can improve the reflection of light in multiple directions due to the uneven top surface of each area of the display module 1000 , and improve the display effect of the display module 1000 .

In a specific embodiment, when the first display panel 100 includes the first encapsulation layer 13 and the first encapsulation layer 13 is the film layer farthest from the first substrate 11 , the upper surface of the first display panel 100 is the first encapsulation layer 13 away from the surface of the first substrate 11; when the second display panel 200 includes the second encapsulation layer 33 and the second encapsulation layer 33 is the farthest film layer from the second substrate 31, the upper surface of the second display panel 200 is the first The two encapsulation layers 33 face away from the surface of the second substrate 31 . Alternatively, when the first display panel 100 includes the first polarizing layer 14 and the first polarizing layer 14 is the farthest film layer from the first substrate 11 , the upper surface of the first display panel 100 is such that the first polarizing layer 14 is away from the first polarizing layer 14 . The surface of the substrate 11; when the second display panel 200 includes the second polarizing layer 34 and the second polarizing layer 34 is the film layer farthest from the second substrate 31, the upper surface of the second display panel 200 is the second polarizing layer 34 away from the surface of the second substrate 31 . It can be understood that the film structure of the upper surface of the first display panel 100 and the upper surface of the second display panel 200 may be different. For example, when the film structure of the first display panel 100 and the second display panel 200 are not completely the same Meanwhile, the upper surface of the first display panel 100 may be the surface of the first encapsulation layer 13 facing away from the first substrate 11 , and the upper surface of the second display panel 200 may be the surface of the second polarizing layer 34 facing away from the second substrate.

Since the first display panel 100 is formed on the first substrate 11 , and the second display panel 200 is located under the first substrate 11 , it is easy to exist between the display surface of the first display panel 100 and the display surface of the second display panel 200 The height difference is likely to cause uneven display. In order to solve the above problem, the light transmittance of the film between the upper surface of the first display panel 100 and the upper surface of the display module 1000 is the same as that between the upper surface of the second display panel 200 and the display. The light transmittances of the film layers between the upper surfaces of the module 1000 are the same, wherein the film layers included in the first display panel 100 and the second display panel 200 are the same. Through the above arrangement, when the light emitted by the first display panel 100 and the second display panel 200 reaches the upper surface of the display module 1000 , the amount of light in the area where the first display panel 100 is located and the area where the second display panel 200 is located are close to the same. , to improve the display effect of the display module 1000 formed by splicing, and to improve the uneven brightness and darkness.

It can be understood that the consistency of the film layers included in the first display panel 100 and the second display panel 200 means that the structure, thickness, quantity, and composition materials of the film layers included in the first display panel 100 and the second display panel 200 are all uniform. Consistent. Through the above arrangement, it can be avoided that the structures of the two display panels are different, resulting in an obvious difference in display effect, which affects the user's experience. Further, the OLED display panel performs light-emitting display in the light-emitting layer. In order to effectively improve the display uniformity of the display module 1000 in each area, it is preferable to set the upper surface of the light-emitting layer of the first display panel 100 to the display module 1000. The light transmittance of the film between the upper surfaces of the second display panel 200 is consistent with the light transmittance of the film between the upper surface of the light-emitting layer of the second display panel 200 and the upper surface of the display module 1000 .

Referring further to FIG. 3 , in some embodiments, the film layer between the upper surface of the first display panel 100 and the upper surface of the display module 1000 includes: a first adhesive layer 21 and a first protective layer 22 arranged in layers; The film layer between the upper surface of the second display panel 200 and the upper surface of the display module 1000 includes: the second adhesive layer 41 and the second protective layer 42 arranged in layers, the first adhesive layer 21 and the first protective layer 22 , the second adhesive layer 41 and the second protective layer 42 are each a single layer or include multiple sub-layers stacked adjacent or not adjacent, wherein the first combination of the first protective layer 22 and the first adhesive layer 21 is transparent. The light rate is the same as the second combined light transmittance of the second adhesive layer 41 and the second protective layer 42 . It should be noted that the combined transmittance refers to the total transmittance of light passing through the protective layer and the adhesive layer, that is, when the light enters the adhesive layer and leaves the protective layer with the first radiant energy, the second light is obtained. Two radiant energy, the combined transmittance is the ratio of the second radiant energy to the first radiant energy. The materials of the first adhesive layer 21 and the second adhesive layer 41 may be optical adhesive (Optically Clear Adhesive, OCA).

In the embodiment of the present invention, by disposing the first protective layer 22 on the upper surface side of the first display panel 100, the first display panel 100 can be effectively protected, and the first display panel 100 can be prevented from being damaged by external stress. The second protective layer 42 is disposed on the upper surface of the second display panel 200 , which can effectively protect the second display panel 200 and prevent the second display panel 200 from being damaged by external stress, thereby improving the strength and stability of the display module 1000 . Further, by setting the first combined light transmittance of the first protective layer 22 and the first adhesive layer 21 to be the same as the second combined light transmittance of the second adhesive layer 41 and the second protective layer 42, the The thicknesses of the adhesive layer 21 and the first protective layer 22 are relatively large, and the thicknesses of the second adhesive layer 41 and the second protective layer 42 are relatively large and uneven, which will affect the performance of the first display panel 100 and the second display panel 200 . Uniformity of light output.

In some embodiments, the film layer between the upper surface of the second display panel 200 and the upper surface of the display module 1000 is composed of the first adhesive layer 21 and the first protective layer 22 which are arranged in layers. The first adhesive layer 21 and the first protective layer 22 are sequentially disposed in a direction away from the first substrate 11 . The film layer between the upper surface of the second display panel 200 and the upper surface of the display module 1000 is composed of the second adhesive layer 41 and the second protective layer 42 which are arranged in layers. Through the above arrangement, the film layer structure between the upper surface of the display module 1000 and the upper surfaces of the first display panel 100 and the second display panel 200 can be simplified, the structure of the display module 1000 can be simplified, and by controlling the first adhesive layer The first combined transmittance of 21 and the first protective layer 22 is the same as the second combined transmittance of the second adhesive layer 41 and the second protective layer 42, which can effectively improve the display uniformity of the display module 1000 in each area. .

Please further refer to FIG. 3 , the second protective layer 42 of the second display panel 200 is of the same layer and the same material as the first substrate 11 . At this time, the second protective layer 42 and the first substrate 11 are integrally formed. Through the above arrangement, it is possible to avoid Disposing the second protective layer 42 separately simplifies the manufacturing process, saves costs, improves the structural stability of the joint between the two display panels, simplifies the structure of the joint, avoids additional connection areas at the joint, and facilitates the consistency of light output.

Based on this, in some embodiments, when the second protective layer 42 is integrally formed with the first substrate 11 , the second adhesive layer 41 is composed of the first adhesive sub-layer 411 and the second adhesive sub-layer 412 . An adhesive sub-layer 411 is located between the second display panel 200 and the second protective layer 42, and the second adhesive sub-layer 412 is located on the side of the second protective layer 42 away from the second display panel 200. At this time, the second adhesive The top surface of the sub-layer 412 is coplanar with the top surface of the display module 1000 . The second display panel 200 is adhered under the first substrate 11 through the first adhesive sub-layer 411 , and further, a portion of the second protective layer 42 facing away from the second display panel 200 is filled through the second adhesive sub-layer 412 . side, the step difference between the second protective layer 42 and the first protective layer 22 can be reduced, and the unevenness of the upper surface of the display module 1000 can be reduced.

In order to enlarge the display area of the display module 1000, the second display panel 200 includes a non-overlapping portion that does not overlap with the first display panel 100, and the non-overlapping portion can be used to display the second part of the image. The flatness and continuity of the upper surface of 1000 in each area, the second adhesive sub-layer 412 covers the non-overlapping portion, and the upper surface of the first protective layer 22 and the upper surface of the second adhesive sub-layer 412 are coplanarly connected.

When the upper surface of the first protective layer 22 is coplanar with the upper surface of the display module 1000 and the upper surface of the second adhesive sub-layer 412 is coplanar with the upper surface of the display module 1000 , the light emitted from the first display panel 100 The light emitted from the second display panel 200 is emitted into the air through the first protective layer 22 to be recognized by the user, and the light emitted from the second display panel 200 is emitted into the air through the second adhesive sub-layer 412 to be recognized by the user. In some embodiments, the refractive index of the first protective layer 22 is the same as the refractive index of the second adhesive sub-layer 412, at this time, the reflection of light at the interface between the first protective layer 22 and the air The rate is the same as the reflectivity of light at the interface between the second adhesive sub-layer 412 and the air, which improves the display effect of the display module 1000 .

Please refer to FIG. 4 , which is a cross-sectional view of another display module shown in FIG. 1 along the M-M direction. In some embodiments, the display module 1000 further includes a first adhesive layer 21 and a first protective layer 22 disposed in sequence on the first display panel 100 , and a second adhesive layer disposed in sequence on the second display panel 200 layer 41 and the second protective layer 42, the first substrate 11 is multiplexed as the second protective layer 42 of the second display panel 200, and the display area of the second display panel 200 includes a non-overlapping non-overlapping layer with the first display panel 100. The overlapped area is used to display the second portion of the image. The display module 1000 further includes a third adhesive layer 43 located on the first substrate 11, and the third adhesive layer 43 covers the non-overlapping area. area, optionally, the third adhesive layer 43 can completely cover the non-overlapping area; the upper surface of the third adhesive layer 43 is coplanar with and connected to the upper surface of the first protective layer 22; the first adhesive layer 21 and The combined light transmittance of the first protective layer 22 is the same as the combined light transmittance of the second adhesive layer 41 , the third adhesive layer 43 and the third protective layer 52 . Through the above arrangement, not only the upper surface of the display module 1000 corresponding to the area where the first display panel 100 is located and the upper surface of the area where the second display panel 200 is located can be made continuous and coplanar, but also the display module 1000 can be effectively improved in each area. The display uniformity is improved, and the quality of the display module 1000 is improved.

Please refer to FIG. 5 . FIG. 5 is a cross-sectional view of another display module shown in FIG. 1 along the M-M direction. In some embodiments, the display area of the second display panel 200 includes a non-overlapping area that does not overlap with the first substrate 11 , the second adhesive layer 41 is located in the non-overlapping area, and the second adhesive layer 41 is formed by the first substrate 11 . Three adhesive sub-layers 413 and a fourth adhesive sub-layer 414 are formed. The third adhesive sub-layer 413 is connected between the second protective layer 42 and the second display panel 200 , and the fourth adhesive sub-layer 414 is located in the second display panel 200 . The upper surface of the panel 200, the orthographic projection of the fourth adhesive sub-layer 414 on the plane where the second display surface of the second display panel 200 is located, is connected to the first protective layer 22 where the second display surface of the second display panel 200 is located Between the orthographic projection on the plane and the orthographic projection of the second protective layer 42 on the second display surface of the second display panel 200 . Through the above arrangement, it is convenient to make the upper surface of the display module 1000 flat.

In specific implementation, the third adhesive sub-layer 413 can be firstly adhered to one side of the second protective layer 42, and then the third adhesive sub-layer 413 and the second protective layer 42 can be integrally adhered to the second display panel 200 , and finally fill the liquid fourth adhesive sub-layer 414 between the first protective layer 22 and the second protective layer 42 , so as to facilitate the smoothing of the upper surface of the display module 1000 .

In order to better illustrate that the display module shown in FIG. 5 can well realize the flatness of the upper surface of the display module 1000 , the following description is made with reference to the comparative example shown in FIG. 6 . Please refer to FIG. 6 , which is a schematic structural diagram of the display module provided by the comparative example in FIG. 5 . In FIG. 6 , when the second protective layer 42 is bonded, the second bonding layer 41 may be disposed on the upper surface of the second display panel 200 first, and then the second protective layer 42 may be bonded to the second bonding layer On the upper surface of 41, since the second adhesive layer 41 is an integral adhesive layer structure, in the process of bonding the second protective layer 42, there will be a predetermined pressing action, which is easy to cause partial parts of the second adhesive layer 41. The protrusion or unevenness is likely to cause unevenness between the upper surface of the second adhesive layer 41 and the upper surface of the second protective layer 42 between the first protective layer 22 and the second protective layer 42 . However, in the embodiment of the present invention, by setting the second adhesive layer 41 as the third adhesive sub-layer 413 and the fourth adhesive sub-layer 414, the third adhesive sub-layer 413 and the fourth adhesive sub-layer can be separately provided Step 414 , improve and effectively improve the unevenness of the upper surface of the display module 1000 caused in the comparative example.

In some embodiments, the orthographic projection of the third adhesive sub-layer 413 on the second display surface overlaps with the orthographic projection of the second protective layer 42 on the second display surface, and the third adhesive sub-layer 413 and the second protective layer 413 overlap with each other. The combined light transmittance of the layer 42 is the same as the light transmittance of the fourth adhesive sub-layer 414 . Through the above arrangement, the light absorption rate of the fourth adhesive sub-layer 414 and the combined light absorption rate of the third adhesive sub-layer 413 and the second protective layer 42 are effectively prevented from affecting the first display panel 100 and the second display panel 100. Uniformity of light output from the display panel 200 . The combined absorptivity refers to the sum of the absorptivity of the third adhesive sub-layer 413 and the second protective layer 42 to light.

In order to achieve a flat and continuous upper surface at each area of the display module 1000 , the upper surface of the first protective layer 22 , the upper surface of the fourth adhesive sub-layer 414 and the upper surface of the second protective layer 42 are coplanar and connected.

In some embodiments, the refractive index of the first protective layer 22 , the refractive index of the fourth adhesive sub-layer 414 , and the refractive index of the second protective layer 42 are the same. At this time, the reflectivity of light at the interface between the first protective layer 22 and the air is the same as the reflectivity of light at the interface between the fourth adhesive sublayer 414 and the air, which improves the display effect of the display module 1000 .

Since the display module 1000 is formed by splicing the first display panel 100 and the second display panel 200, in order to reduce the splicing frame in the display module 1000, in some embodiments, the first display panel 100 has the first display area AA1 and The first non-display area NA1 disposed on the outer peripheral side of the first display area AA1, the second display panel 200 has a second display area AA2, the first non-display area NA1 includes an overlapping area, and the overlapping area overlaps with the second display area AA2. The overlapping area can transmit light so that the light emitted by the second display panel 200 can pass through the first display panel 100 . Optionally, the material of the first substrate 11 is a transparent material, for example, the material of the first substrate 11 may be polyimide (Colorless Polyimide, CPI), so as to transmit the light emitted by the second display panel 200 . Through the above arrangement, the splicing frame of the first display panel 100 and the second display panel 200 can be effectively reduced, that is, the non-light-emitting area of the overlapping area can be reduced.

Please refer to FIG. 7 and FIG. 8 together. FIG. 7 is a schematic top-view structure diagram of a first display panel according to another embodiment of the present invention, and FIG. 8 is an enlarged schematic diagram of the position Q in FIG. 1 . In some embodiments, the first non-display area NA1 includes a first frame area FR1 and a second frame area FR2 oppositely disposed along the first direction X, the display panel includes a plurality of scan lines 16 and a scan driving circuit 17 , and the scan driving circuit 17 includes a plurality of scan driving modules 171, each scan line 16 receives signals via one scan driving module 171, some of the scan driving modules 171 are located in the first frame area FR1, and some scan driving modules 171 are located in the second frame area FR2. The first direction X may be the row direction of the first display panel 100 , and the second direction Y may be the column direction of the first display panel 100 . By driving each scan line 61 on one side, some scan driving modules 171 are located in the first frame area FR1 and some scan driving modules 171 are located in the second frame area FR2, compared to placing all scan driving modules 171 in one The frame area can reduce the number of scan driving modules 171 located in the first frame area FR1 and the second frame area FR2, so that the area where the scan driving modules 171 are not arranged in the first frame area FR1 can transmit light, and the second frame area The scan driving module 171 is not arranged in FR2 to transmit light, which effectively reduces the splicing frame of the first display panel 100 and the second display panel 200 , and reduces the area of the non-display area in the display module 1000 .

As shown in FIG. 8 , in some embodiments, the first frame area FR1 overlaps with the second display area AA2 , the first frame area FR1 includes a first light-transmitting area FR11 , and the first light-transmitting area FR11 is not connected to the scan line 16 . One end connected to the scan drive circuit 17 is disposed adjacent to each other. Through the above arrangement, the first light-transmitting region FR11 is formed in the region of the first frame region FR1 where the scan driving module 171 is not arranged, so as to transmit the light emitted by the second display panel 200 .

In a specific embodiment, the first display panel 100 includes a plurality of first sub-pixels PX1 located in the first display area AA1, and the second display panel 200 includes a plurality of second sub-pixels PX2 located in the second display area AA2. 7 and FIG. 8, the filled lines of the same color represent sub-pixels of the same emission color. In the first frame area FR1, FIG. 8 schematically shows that the scan lines 16 located in the second row and the fourth row are not connected to the scan driving circuit 17, and the number of wirings in this area is reduced, which can effectively increase the light transmission area to A plurality of first light-transmitting regions FR11 are formed. In the first light-transmitting regions FR11, the light emitted by the second sub-pixels PX2 located on the second display panel 200 can pass through, that is, in the first light-transmitting regions FR11 , can pass through the second sub-pixel PX2 located in the second row and the second sub-pixel PX2 located in the fourth row.

In some embodiments, the scan lines 16 extend along the first direction X and are arranged along the second direction Y, the first direction X and the second direction Y intersect, and the plurality of scan lines 16 alternately connect the scan lines located in the first frame region FR1 The driving module 171 and the scanning driving module 171 located in the second frame region FR2, in the first frame region FR1, along the second direction Y, the scanning driving circuits 17 and the first transparent regions FR11 are alternately arranged. In a specific embodiment, one scan line 16 is connected to the first sub-pixels PX1 located in the same row, and the scan driving module 171 connected to the scan lines 16 of odd rows can be arranged in the first frame area FR1, and the scan lines 171 of the even rows can be connected to The scan driving modules 171 connected by the lines 16 are disposed in the second frame region FR2, so that in the first frame region FR1, along the second direction Y, the scan driving circuits 17 and the first light-transmitting regions FR11 are alternately arranged. Through the above arrangement, the light emitted by the second display panel 200 can be uniformly transmitted through the first display panel 100, thereby improving the display uniformity of the overlapping area.

Please refer to FIGS. 9 and 10 , FIG. 9 is a schematic top view of a display module provided by another embodiment of the present invention, and FIG. 10 is a cross-sectional schematic view of a display module provided by another embodiment. Since all the scan driving modules 171 are distributed in the first frame area FR1 and the second frame area FR2, in some embodiments, the second frame area FR2 includes the second transparent area FR21 and the second transparent area FR21 It is provided adjacent to one end of the scan line 16 which is not connected to the scan drive circuit 17 . Through the above arrangement, the light-transmitting area of the second frame area FR2 can be effectively increased, and another display panel can be easily spliced in the area corresponding to the second frame area FR2, thereby realizing the continuous splicing of multiple display panels in rows. The display module 1000 is expanded to a larger size.

Based on this, in some embodiments, the display module 1000 further includes a third display panel 300 , the third display panel 300 is located under the first substrate 11 , and the third display panel 300 includes a third display area AA3 and is located in the third display area AA3 Pixels in area AA3, specifically, the third display panel 300 includes third sub-pixels PX3 located in the third display area AA3, and the third display area overlaps with the second light-transmitting area FR21; at least part of the pixels of the third display panel 300 Displayed through the second transparent region FR21. As shown in FIG. 9 , at least part of the third sub-pixels PX3 of the third display panel 300 are displayed through the second light-transmitting region FR21 .

Since a part of the scan driving modules 171 are arranged in the second frame region FR2, some pixels in the third display panel 300 are still blocked. In order to make the display effect of the overlapping area of the third display panel 300 and the first display panel 100 match the same The display effect of the non-overlapping area is close. In some embodiments, in the third display panel 300, the pixels displayed through the second light transmission area FR21 include micro light emitting diodes (Micro LEDs). The size of the micro light emitting diode is smaller than that of the organic light emitting diode. Therefore, a larger number of micro light emitting diodes can be arranged in the second light-transmitting region FR21, thereby improving the display effect of the overlapping region.

Likewise, as shown in FIG. 9 , in some embodiments, in the second display panel 200 , the pixels displayed through the first light-transmitting region FR11 include micro-LEDs, so as to effectively improve the performance of the first display panel 100 and the second display panel 100 . Display effect of the overlapping area of the display panel 200 . During specific implementation, based on the fabrication temperature of the micro-LED and the fabrication temperature of the organic light-emitting diode, the molded micro-LED may be fabricated first, and then the organic light-emitting diode may be fabricated.

Further, please refer to FIG. 10 , the display module 1000 may further include a fourth adhesive layer 51 and a third protective layer 52 arranged on the third display panel 300 in sequence, and the first substrate 11 is multiplexed into the third display panel The third protective layer 52 of 300, the display area of the third display panel 300 includes a non-overlapping area that does not overlap with the first display panel 100, the upper surface of the fourth adhesive layer 51 and the upper surface of the first protective layer 22 Coplanar and connected, in order to improve the display effect of the display module 1000, the combined transmittance of the fourth adhesive layer 51 and the third protective layer 52 and the combined transmittance of the first adhesive layer 21 and the first protective layer 22 same. Alternatively, the arrangement of the fourth adhesive layer 51 and the third protective layer 52 may be similar to the arrangement of the second adhesive layer 41 and the second protective layer 42 shown in FIG. 5 , and will not be described again.

To sum up, the display module 1000 according to the embodiment of the present invention includes the first substrate 11 , the first display panel 100 formed on the first substrate 11 , and the second display panel located under the first substrate 11 200, the first display panel 100 displays the first part of the image, and the second display panel 200 displays the second part of the image, so that the first display panel 100 and the second display panel 200 can be spliced with each other to increase the display area of the display module 1000 . Further, the first display panel 100 and the second display panel 200 are connected through the first substrate 11, so that the connection between the first display panel 100 and the second display panel 200 is more compact, compared to using other connection structures By connecting two display panels, the display module 1000 according to the embodiment of the present invention has a smaller thickness, which is convenient to realize the lightness and thinness of the display module 1000 and makes the structure of the display device more reasonable. Since the first display panel 100 and the second display panel 200 do not completely overlap, at this time, the display image of the second display panel 200 is easily blocked by the first display panel 100. When the first substrate 11 is a transparent substrate, the A substrate 11 can transmit light from the second display panel 200 located under the first substrate 11 , reducing the overlapping area between the first display panel 100 and the second display panel 200 , thereby reducing the size of the display module 1000 stitching border.

On the other hand, an embodiment of the present invention further provides a display device including the display module 1000 provided in any of the above embodiments. According to the display device of the embodiment of the present invention, the first display panel 100 and the second display panel 200 can be spliced with each other to increase the display area of the display module 1000 . Further, the first display panel 100 and the second display panel 200 are connected through the first substrate 11, so that the connection between the first display panel 100 and the second display panel 200 is more compact, compared to using other connection structures By connecting two display panels, the display module 1000 according to the embodiment of the present invention has a smaller thickness, which is convenient to realize the lightness and thinness of the display module 1000 and makes the structure of the display device more reasonable. Since the first display panel 100 and the second display panel 200 do not completely overlap, at this time, the display of the second display panel 200 is easily blocked by the first display panel 100. When the first substrate 11 is a transparent substrate, The light of the second display panel 200 located under the first substrate 11 can pass through, reducing the overlapping area between the first display panel 100 and the second display panel 200, so as to reduce the splicing frame of the display device and facilitate the promotion application.

In accordance with the present invention such as the above embodiments, these embodiments do not exhaustively describe all the details, nor do they limit the invention to only the described specific embodiments. Obviously, many modifications and variations are possible in light of the above description. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present invention, so that those skilled in the art can make good use of the present invention and modifications based on the present invention. The present invention is to be limited only by the claims and their full scope and equivalents.

Claims (21)

1. a display module, is characterized in that, comprises: a first substrate; A first display panel formed on a first substrate, the first display panel displaying a first portion of an image, and a film layer between the upper surface of the first display panel and the upper surface of the display module includes a stacked arrangement The first adhesive layer and the first protective layer; a second display panel under the first substrate, the second display panel does not completely overlap the first display panel; the second display panel displays a second portion of the image; the second display panel The film layer between the upper surface of the display panel and the upper surface of the display module includes a second adhesive layer and a second protective layer arranged in layers; The orientation of the first display surface of the first display panel and the second display surface of the second display panel is the same, Wherein, the first substrate extends to cover the second display panel, the first substrate is multiplexed as the second protective layer of the second display panel, the first display panel and the second display panel The two display panels are connected through the first substrate; Each of the first adhesive layer, the first protective layer, the second adhesive layer, and the second protective layer is a single layer or includes a plurality of sub-layers stacked adjacently or not; Wherein, the first combined light transmittance of the first protective layer and the first adhesive layer is the same as the second combined light transmittance of the second adhesive layer and the second protective layer. 2 . The display module according to claim 1 , wherein an upper surface of the display module in an area corresponding to the first display panel and an upper surface of the display module corresponding to the second display panel The upper surfaces in the region are coplanar. 3 . The display module of claim 1 , wherein the first display panel and the second display panel have the same film layers. 4 . 4 . The display module according to claim 3 , wherein the film layer between the upper surface of the first display panel and the upper surface of the display module is formed by the laminated first adhesive layer. 5 . layer and the first protective layer, the first adhesive layer and the first protective layer are arranged in sequence along the direction away from the first substrate; The film layer between the upper surface of the second display panel and the upper surface of the display module is composed of the second adhesive layer and the second protective layer arranged in layers. 5 . The display module according to claim 4 , wherein the second adhesive layer is composed of a first adhesive sub-layer and a second adhesive sub-layer, and the first adhesive sub-layer is located at the between the second display panel and the second protective layer, the second adhesive sub-layer is located on the side of the second protective layer away from the second display panel. 6 . The display module according to claim 5 , wherein the second display panel includes a non-overlapping portion that does not overlap with the first display panel, and the second adhesive sublayer covers the second display panel. 7 . the non-overlapping portion, The upper surface of the first protective layer and the upper surface of the second adhesive sub-layer are coplanarly connected. 7 . The display module according to claim 5 , wherein the refractive index of the first protective layer is the same as the refractive index of the second adhesive sub-layer. 8 . 8. The display module according to claim 1, wherein the display module further comprises: a first adhesive layer and a first protective layer arranged in sequence on the first display panel; a second adhesive layer and a second protective layer arranged in sequence on the second display panel; The display area of the second display panel includes a non-overlapping area that does not overlap with the first display panel, The display module further includes a third adhesive layer on the first substrate, the third adhesive layer covers the non-overlapping area; the upper surface of the third adhesive layer is connected to the The upper surfaces of the first protective layer are coplanar and connected; The combined light transmittance of the first adhesive layer and the first protective layer is the same as the combined light transmittance of the second adhesive layer, the third adhesive layer and the second protective layer. 9 . The display module according to claim 1 , wherein the display area of the second display panel includes a non-overlapping area that does not overlap with the first substrate, and the second adhesive layer in the non-overlapping area, the second adhesive layer is composed of a third adhesive sublayer and a fourth adhesive sublayer, the third adhesive sub-layer is connected between the second protective layer and the second display panel, The fourth adhesive sub-layer is located on the upper surface of the second display panel, and the orthographic projection of the fourth adhesive sub-layer on the plane where the second display surface of the second display panel is located is connected to the second display panel. The orthographic projection of the first protective layer on the plane where the second display surface of the second display panel is located is the same as the orthographic projection of the second protective layer on the second display surface of the second display panel. between projections. 10 . The display module of claim 9 , wherein the orthographic projection of the third adhesive sub-layer on the second display surface and the second protective layer on the second display surface The orthographic projections on the overlap, The combined light transmittance of the third adhesive sub-layer and the second protective layer is the same as the light transmittance of the fourth adhesive sub-layer. 11 . The display module according to claim 9 , wherein the upper surface of the first protective layer, the upper surface of the fourth adhesive sub-layer and the upper surface of the second protective layer are coplanar. 12 . and connect. 12. The display module according to any one of claims 9 to 11, wherein the refractive index of the first protective layer, the refractive index of the fourth adhesive sub-layer and the second protective layer have the same refractive index. 13 . The display module according to claim 1 , wherein the first display panel has a first display area and a first non-display area disposed on the outer peripheral side of the first display area, and the second display area. 14 . The display panel has a second display area, The first non-display area includes an overlap area, the overlap area overlaps with the second display area, and the overlap area can transmit light so that the light emitted by the second display panel can pass through the overlap area. the first display panel. 14 . The display module of claim 13 , wherein the first non-display area comprises a first frame area and a second frame area opposite to each other along the first direction, and the display panel comprises a plurality of scanning lines. 15 . line and scan drive circuit, the scan drive circuit includes a plurality of scan drive modules, each of the scan lines receives a signal via one of the scan drive modules, Some of the scan driving modules are located in the first frame area, and some of the scan driving modules are located in the second frame area. 15 . The display module of claim 14 , wherein the first frame area overlaps the second display area, the first frame area comprises a first light-transmitting area, and the first The light-transmitting area is disposed adjacent to one end of the scan line that is not connected to the scan driving circuit. 16 . The display module according to claim 15 , wherein the scan lines extend along the first direction and are arranged along the second direction, the first direction and the second direction intersect, and there are many 16 . The scan lines are alternately connected to the scan driving module located in the first frame area and the scan driving module located in the second frame area, In the first frame area, along the second direction, the scan driving circuits and the first light-transmitting area are alternately arranged. 17 . The display module of claim 14 , wherein the second frame region comprises a second light-transmitting region, and the second light-transmitting region and the scan lines are not connected to the scan driving circuit. 18 . One end is adjacent. 18. The display module according to claim 17, wherein the display module further comprises: A third display panel, located under the first substrate, the third display panel includes a third display area and pixels located in the third display area, and the third display area intersects the second light-transmitting area stack; At least a part of the pixels of the third display panel are displayed through the second light-transmitting area. 19 . The display module of claim 18 , wherein, in the third display panel, the pixels displayed through the second light-transmitting region comprise micro-LEDs. 20 . 20. The display module according to claim 1, wherein the first display panel and the second display panel are both organic light emitting diode display panels, The material of the first substrate is a transparent material. 21. A display device, comprising the display module according to any one of claims 1 to 20.

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