CN111640377B - Display module and display device - Google Patents

Display module and display device Download PDF

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Publication number
CN111640377B
CN111640377B CN202010614931.6A CN202010614931A CN111640377B CN 111640377 B CN111640377 B CN 111640377B CN 202010614931 A CN202010614931 A CN 202010614931A CN 111640377 B CN111640377 B CN 111640377B
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Prior art keywords
display panel
display
layer
display module
area
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CN202010614931.6A
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CN111640377A (en
Inventor
于泉鹏
姚绮君
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Shanghai Tianma Microelectronics Co Ltd
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Shanghai Tianma Microelectronics Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements
    • G09F9/3026—Video wall, i.e. stackable semiconductor matrix display modules
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/15—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission
    • H01L27/153—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission in a repetitive configuration, e.g. LED bars
    • H01L27/156—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission in a repetitive configuration, e.g. LED bars two-dimensional arrays
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays

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 invention relates to the technical field of display, in particular to a display module and a display device.
Background
With the demand of users for large area display devices, e.g., video walls for displaying video in electronic media, which place high demands on the area of the display device, multiple small area display panels can often be tiled to create larger display devices.
However, how to implement reasonable splicing of a plurality of small-area display panels to improve the performance of the display device, for example, reducing the splicing frame of the display device, rationalizing the structure of the display device is a problem that needs to be solved urgently.
Disclosure of Invention
The invention provides a display module and a display device, and aims to improve the performance of the display device, reduce the splicing frame of the display device and enable the structure of the display device to be more reasonable.
In one aspect, an embodiment of the present invention provides a display module, including: the display panel comprises a first substrate, a first display panel formed on the first substrate and a second display panel positioned below the first substrate; the first display panel displays a first portion of an image; the second display panel does not completely overlap with 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.
On the other hand, an embodiment of the invention provides a display device, which includes the display module.
According to the display module and the display device provided by the embodiment of the invention, the display module comprises a first substrate, a first display panel formed on the first substrate and a second display panel positioned below the first substrate, the first display panel displays a first part of an image, and the second display panel displays a 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. Furthermore, 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, and compared with the connection between the first display panel and the second display panel through other connection structures, the display module provided by the embodiment of the invention has smaller thickness, is convenient for realizing the lightness and thinness of the display module, and enables the structure of the display device to be more reasonable. Because first display panel and the incomplete overlap of second display panel, at this moment, the display screen of second display panel is easily sheltered from by first display panel, and when first substrate was the transparent substrate, first substrate can see through the light that is located the second display panel under the first substrate, reduces the overlapping area between first display panel and the second display panel to reduce display module's concatenation frame.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings in which like or similar reference characters refer to like or similar parts and which are not necessarily drawn to scale.
Fig. 1 is a schematic top view of a display module according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a first display panel and a second display panel according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of one of the display modules shown in FIG. 1 taken along the direction M-M;
FIG. 4 is a cross-sectional view of the display module shown in FIG. 1 taken along the direction M-M;
FIG. 5 is a cross-sectional view of still another display module shown in FIG. 1 taken along the direction M-M;
FIG. 6 is a schematic structural diagram of a display module provided in the comparative example of FIG. 5;
fig. 7 is a schematic top view illustrating a first display panel according to another embodiment of the present invention;
FIG. 8 is an enlarged schematic view at Q of FIG. 1;
FIG. 9 is a schematic diagram illustrating a top view of a display module according to another embodiment of the present invention;
fig. 10 is a schematic cross-sectional view of a display module according to another embodiment.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, 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 merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The embodiment of the invention provides a display module 1000 and a display device. The display module 1000 and the display device according to the embodiment of the invention are described in detail below with reference to the drawings.
Referring to fig. 1 to 3 together, fig. 1 is a schematic top view of a display module according to an embodiment of the present invention, fig. 2 is a schematic structural view of a first display panel and a second display panel according to an embodiment of the present invention, and fig. 3 is a cross-sectional view of the display module shown in fig. 1 along a direction M-M. The embodiment of the invention provides a display module 1000, which includes 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 a first portion of an image, the second display panel 200 does not completely overlap the first display panel 100, the second display panel 200 displays a second portion of the image, the first display surface of the first display panel 100 and the second display surface of the second display panel 200 are oriented in the same direction, 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 at an outer peripheral side of the first display area AA1, the second display panel 200 has a second display area AA2 and a second non-display area NA2 disposed at an outer peripheral side of the second display area AA2, the first display panel 100 includes a first substrate 11 and a laminated structure on the first substrate 11, at least a portion of the second display area AA2 does not overlap the laminated structure in the first display panel 100, so that the first display area AA1 of the first display panel 100 can display a first portion of an image, and the second display area AA2 of the second display panel 200 can display a second portion different from the first portion of the image. Further, the projections of the first portion and the second portion of the image in the plane of the upper surface of the first substrate 11 are located in different areas, so that the first portion and the second portion are arranged in parallel and are overlapped with each other to form a complete image, and the first display panel 100 and the second display panel 200 are spliced to form the display module 1000 with a larger area.
According to the display module 1000 of the embodiment of the invention, the first display panel 100 displays a first part of an image, and the second display panel 200 displays a 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, the display module 1000 is convenient to realize to be light and thin, and the structure of the display device is more reasonable. Because the first display panel 100 and the second display panel 200 are not completely overlapped, at this time, the display screen of the second display panel 200 is easily shielded by the first display panel 100, and when the first substrate 11 is a transparent substrate, the first substrate 11 can also transmit the light of the second display panel 200 located under the first substrate 11, so as to reduce the overlapping area between the first display panel 100 and the second display panel 200, and reduce the splicing frame of the display module 1000.
In some embodiments, the first display panel 100 is an 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 200 may also be an OLED display panel, so as to improve the display uniformity of the two display panels, further improve the display uniformity of the display module 1000, and improve the display effect of the display module 1000.
The structure of the first display panel 100 and the second display panel 200 will be described 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 defining layer 15, a first light emitting element layer 12, and a first encapsulation layer 13, which are sequentially stacked. The first array layer AR1 includes a wiring layer and a plurality of pixel circuits. The wiring layer comprises a scanning line, a data line and a power line, and the pixel circuits at least comprise a switch transistor, a driving transistor and a storage capacitor. The wiring layer is connected to the plurality of first sub-pixels PX1 located in the first display area AA1 through the plurality of pixel circuits, thereby driving the first sub-pixels PX1 to emit light. The first pixel defining 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 first electrode 121 is located on a side of the first light emitting structure 123 facing the first substrate 11, and the second electrode 122 is located on a side of the first light emitting structure 123 facing away from the first substrate 11. 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 Injecting Layer (HIL), a Hole Transporting Layer (HTL), a light emitting Layer, an Electron Transporting Layer (ETL), and an Electron Injecting Layer (EIL) sequentially arranged in a direction away from the first substrate 11. In some embodiments, the first light emitting structure 123 may further include an Electron Blocking Layer (EBL) between the Hole sub-transport Layer and the light emitting Layer, and a Hole Blocking Layer (HBL) between the light emitting Layer and the Electron transport Layer. In the light emitting display, hole carriers move to the light emitting layer along the hole injection layer and the hole transport layer, electron carriers move to the light emitting layer along the electron injection layer, the electron transport layer and the hole blocking layer, and holes and electrons react in the light emitting layer to enable the light emitting layer to emit 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 defining layer 35, a second light emitting element layer 32, and a second encapsulation layer 33, which are sequentially stacked. 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 defining layer 35 includes a second pixel opening, the second light emitting structure 323 is located in the second pixel opening, the third electrode 321 is located on a side of the second light emitting structure 323 facing the second substrate 31, and the fourth electrode 322 is located on a side of the second light emitting structure 323 facing away from the second substrate 31. 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 thus, the description thereof is omitted.
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, so as to improve the display effect of the display module 1000. Optionally, in order to enable the display module 1000 to satisfy multiple functions, 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, so as to be conveniently used for performing touch operation on the display module 1000.
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 region corresponding to the first display panel 100 is coplanar with the upper surface of the display module 1000 in the region corresponding to the second display panel 200. It can be understood that the upper surface of the display module 1000 in the region corresponding to the first display panel 100 and the upper surface of the display module 1000 in the region corresponding to the second display panel 200 can form a continuous plane, and by the above arrangement, the light reflection in multiple directions caused by the uneven upper surface of each region of the display module 1000 can be improved, and the display effect of the display module 1000 can be improved.
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 surface of the first encapsulation layer 13 facing away from the first substrate 11; when the second display panel 200 includes the second encapsulation layer 33 and the film layer of the second encapsulation layer 33 farthest from the second substrate 31, the upper surface of the second display panel 200 is a surface of the second encapsulation layer 33 facing away from 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 film layer farthest from the first substrate 11, the upper surface of the first display panel 100 is the surface of the first polarizing layer 14 away from the first 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 surface of the second polarizing layer 34 away from the second substrate 31. It is understood that the film structures 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 structures of the first display panel 100 and the second display panel 200 are not completely the same, the upper surface of the first display panel 100 may be a 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 a surface of the second polarizing layer 34 facing away from the second substrate.
Because 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, a height difference is easily generated between the display surface of the first display panel 100 and the display surface of the second display panel 200, and then a display unevenness phenomenon is easily caused, in order to solve the above problems, the light transmittance of the film layer from the upper surface of the first display panel 100 to the upper surface of the display module 1000 is consistent with the light transmittance of the film layer from the upper surface of the second display panel 200 to the upper surface of the display module 1000, wherein the film layers included by the first display panel 100 and the second display panel 200 are consistent. 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 light quantity in the area where the first display panel 100 is located and the light quantity in the area where the second display panel 200 is located are approximately consistent, the display effect of the display module 1000 formed by splicing is improved, and the condition of uneven brightness is improved.
It is understood that the film layers included in the first display panel 100 and the second display panel 200 are identical, which means that the film layers included in the first display panel 100 and the second display panel 200 are identical in structure, thickness, number, and composition materials of the film layers. Through the arrangement, the display effect gap is obvious and the user experience is influenced due to the fact that the structures of the two display panels are different. Further, the OLED display panel performs light emitting display in the light emitting layer, and in order to effectively improve the display uniformity of the display module 1000 in each region, it is preferable that the light transmittance of the film layer from the upper surface of the light emitting layer of the first display panel 100 to the upper surface of the display module 1000 is set to be the same as the light transmittance of the film layer from the upper surface of the light emitting layer of the second display panel 200 to the upper surface of the display module 1000.
Referring further to fig. 3, in some embodiments, the layers from the top surface of the first display panel 100 to the top surface of the display module 1000 include: a first adhesive layer 21 and a first protective layer 22 which are stacked; the film layers from the upper surface of the second display panel 200 to the upper surface of the display module 1000 include: the light-transmitting film comprises a second adhesive layer 41 and a second protective layer 42 which are arranged in a stacked mode, wherein the first adhesive layer 21, the first protective layer 22, the second adhesive layer 41 and the second protective layer 42 are single-layer or comprise a plurality of adjacent or non-adjacent stacked sub-layers, and the first combined light transmittance of the first adhesive layer 22 and the first adhesive layer 21 is the same as the second combined light transmittance of the second adhesive layer 41 and the second protective layer 42. The combined transmittance refers to a total transmittance of light when the light passes through the protective layer and the adhesive layer, that is, after the light enters the adhesive layer and leaves the protective layer with the first radiation energy, the second radiation energy is obtained, and the combined transmittance is a ratio of the second radiation energy to the first radiation energy. The material of the first Adhesive layer 21 and the second Adhesive layer 41 may be Optical Clear Adhesive (OCA).
In the embodiment of the present invention, the first protection layer 22 is disposed on the upper surface side of the first display panel 100, so as to effectively protect the first display panel 100 and prevent the first display panel 100 from being damaged by external stress, and the second protection layer 42 is disposed on the upper surface side of the second display panel 200, so as to 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 transmittance of the first protective layer 22 and the first adhesive layer 21 to be the same as the second combined transmittance of the second adhesive layer 41 and the second protective layer 42, the thickness of the first adhesive layer 21 and the first protective layer 22 is effectively prevented from being large, and the light emitting uniformity of the first display panel 100 and the second display panel 200 is prevented from being influenced by the large thickness and the uneven thickness of the second adhesive layer 41 and the second protective layer 42.
In some embodiments, the film layer from the upper surface of the second display panel 200 to the upper surface of the display module 1000 is formed by a first adhesive layer 21 and a first protective layer 22 which are stacked, and 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 a second adhesive layer 41 and a second protective layer 42 which are stacked. Through the above arrangement, the film layer structures 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 is simplified, and the first combined transmittance through controlling the first bonding layer 21 and the first protection layer 22 is the same as the second combined transmittance through controlling the second bonding layer 41 and the second protection layer 42, so that the display uniformity of the display module 1000 in each region can be effectively improved.
Referring to fig. 3, the second protection layer 42 of the second display panel 200 and the first substrate 11 are made of the same layer and the same material, and the second protection layer 42 and the first substrate 11 are integrally formed.
Based on this, in some embodiments, when the second protection layer 42 is integrally formed with the first substrate 11, the second adhesion layer 41 is composed of a first adhesion sublayer 411 and a second adhesion sublayer 412, the first adhesion sublayer 411 is located between the second display panel 200 and the second protection layer 42, the second adhesion sublayer 412 is located on a side of the second protection layer 42 facing away from the second display panel 200, and an upper surface of the second adhesion sublayer 412 is coplanar with an upper surface of the display module 1000. Under adhering the second display panel 200 to the first substrate 11 through the first adhesive sublayer 411, further, fill to the one side that the second protection layer 42 deviates from the second display panel 200 through the second adhesive sublayer 412, can reduce the difference in level between the second protection layer 42 and the first protection layer 22, reduce the unevenness of the upper surface of the display module 1000.
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, the non-overlapping portion can be used for displaying a second portion of an image, in order to make the flatness and continuity of the upper surface of the display module 1000 in each region, the second adhesive sublayer 412 covers the non-overlapping portion, and the upper surface of the first protective layer 22 is in coplanar engagement with the upper surface of the second adhesive sublayer 412.
When the upper surface of the first protection layer 22 is coplanar with the upper surface of the display module 1000, and the upper surface of the second adhesive sublayer 412 is coplanar with the upper surface of the display module 1000, the light emitted from the first display panel 100 is emitted into the air through the first protection layer 22 to be recognized by a user, and the light emitted from the second display panel 200 is emitted into the air through the second adhesive sublayer 412 to be recognized by the user.
Referring to fig. 4, fig. 4 is a cross-sectional view of the display module shown in fig. 1 along the direction M-M. In some embodiments, the display module 1000 further includes a first adhesive layer 21 and a first protective layer 22 sequentially disposed on the first display panel 100, and a second adhesive layer 41 and a second protective layer 42 sequentially disposed on the second display panel 200, the first substrate 11 is reused as the second protective layer 42 of the second display panel 200, the display area of the second display panel 200 includes a non-overlapping area that is not overlapped with the first display panel 100, so that the non-overlapping area can be used for displaying a second portion of an image, the display module 1000 further includes a third adhesive layer 43 disposed on the first substrate 11, the third adhesive layer 43 covers the non-overlapping area, optionally, the third adhesive layer 43 may completely cover the non-overlapping area; the upper surface of the third adhesive layer 43 is coplanar and joined with the upper surface of the first protective layer 22; the combined light transmittance of the first adhesive layer 21 and 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, 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 are continuous and coplanar, the display uniformity of the display module 1000 in each area can be effectively improved, and the quality of the display module 1000 is improved.
Referring to fig. 5, fig. 5 is a cross-sectional view of another display module shown in fig. 1 along the direction M-M. 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, the second adhesive layer 41 is composed of a third adhesive sublayer 413 and a fourth adhesive sublayer 414, the third adhesive sublayer 413 is connected between the second protective layer 42 and the second display panel 200, the fourth adhesive sublayer 414 is located on the upper surface of the second display panel 200, and an orthogonal projection of the fourth adhesive sublayer 414 on the plane of the second display surface of the second display panel 200 is connected between an orthogonal projection of the first protective layer 22 on the plane of the second display surface of the second display panel 200 and an orthogonal projection of the second protective layer 42 on the second display surface of the second display panel 200. Through the arrangement, the upper surface of the display module 1000 is smooth.
In specific implementation, the third adhesive sub-layer 413 may be firstly adhered to one side of the second protective layer 42, then the third adhesive sub-layer 413 and the second protective layer 42 are integrally adhered to the upper surface of the second display panel 200, and finally the liquid fourth adhesive sub-layer 414 is filled between the first protective layer 22 and the second protective layer 42, so as to achieve the smooth upper surface of the display module 1000.
To better illustrate that the display module shown in fig. 5 can well achieve the upper surface of the display module 1000 to be flat, the following description is made with reference to the comparative example shown in fig. 6. Referring to fig. 6, fig. 6 is a schematic structural diagram of a display module provided in the comparative example of fig. 5. In fig. 6, when the second protection layer 42 is bonded, the second bonding layer 41 may be disposed on the upper surface of the second display panel 200, and then the second protection layer 42 is bonded to the upper surface of the second bonding layer 41, because the second bonding layer 41 is an integral glue layer structure, in the process of bonding the second protection layer 42, a predetermined pressing effect may be generated, which may easily cause local protrusion or unevenness of the second bonding layer 41, and may easily cause unevenness of the upper surface of the second bonding layer 41 and the upper surface of the second protection layer 42 between the first protection layer 22 and the second protection layer 42. In the embodiment of the present invention, the second adhesive layer 41 is configured as the third adhesive sublayer 413 and the fourth adhesive sublayer 414, and the third adhesive sublayer 413 and the fourth adhesive sublayer 414 can be separately configured, so as to improve and effectively improve the problem of uneven upper surface of the display module 1000 caused in the comparative example.
In some embodiments, an orthogonal projection of the third adhesive sublayer 413 on the second display surface overlaps with an orthogonal projection of the second protective layer 42 on the second display surface, and a combined light transmittance of the third adhesive sublayer 413 and the second protective layer 42 is the same as a light transmittance of the fourth adhesive sublayer 414. With the above arrangement, the difference between the absorptance of the fourth adhesive sublayer 414 and the combined absorptance of the third adhesive sublayer 413 and the second protective layer 42 to light is effectively prevented from affecting the uniformity of the light output of the first display panel 100 and the second display panel 200. The combined absorption rate is the sum of the absorption rates of the third adhesive sub-layer 413 and the second protective layer 42 for light.
In order to realize the flat and continuous upper surface of each region of the display module 1000, the upper surface of the first protection layer 22, the upper surface of the fourth adhesive sub-layer 414, and the upper surface of the second protection 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 sublayer 414, and the refractive index of the second protective layer 42 are the same. At this time, the reflectivity of the light at the interface between the first protection layer 22 and the air is the same as the reflectivity of the light at the interface between the fourth adhesive sub-layer 414 and the air, so as to improve 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 spliced frame in the display module 1000, in some embodiments, the first display panel 100 has a first display area AA1 and a first non-display area NA1 disposed at 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, the overlapping area overlaps with the second display area AA2, and the overlapping area can transmit light so that the light emitted by the second display panel 200 can transmit through the first display panel 100. Alternatively, the material of the first substrate 11 is a transparent material, for example, the material of the first substrate 11 may be Polyimide (CPI) to transmit light emitted from the second display panel 200. Through the arrangement, the frame splicing of the first display panel 100 and the second display panel 200 can be effectively reduced, namely, the non-light-emitting area of the overlapping area is reduced.
Referring to fig. 7 and 8 together, fig. 7 is a schematic top view of a first display panel according to another embodiment of the present invention, and fig. 8 is an enlarged schematic view of a 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 disposed opposite to each other along the first direction X, the display panel includes a plurality of scan lines 16 and a scan driving circuit 17, the scan driving circuit 17 includes a plurality of scan driving modules 171, each scan line 16 receives a signal via one scan driving module 171, the partial scan driving module 171 is located in the first frame area FR1, and the partial scan driving module 171 is located in the second frame area FR 2. The first direction X may be a row direction of the first display panel 100, and the second direction Y may be a column direction of the first display panel 100. By driving each scan line 61 in a single-sided manner, and positioning the partial scan driving module 171 in the first frame region FR1 and the partial scan driving module 171 in the second frame region FR2, the number of the scan driving modules 171 positioned in the first frame region FR1 and the second frame region FR2 can be reduced compared to positioning the entire number of the scan driving modules 171 in one frame region, so that the region of the first frame region FR1 where no scan driving module 171 is positioned can transmit light, and the region of the second frame region FR2 where no scan driving module 171 is positioned can 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 display module 1000 without a display region.
As shown in fig. 8, in some embodiments, the first frame region FR1 overlaps the second display region AA2, the first frame region FR1 includes a first light-transmitting region FR11, and the first light-transmitting region FR11 is disposed adjacent to an end of the scan line 16 not connected to the scan driving circuit 17. With the above arrangement, the first light-transmitting region FR11 is formed in the first frame region FR1 where the scan driving module 171 is not disposed, so as to transmit light emitted from 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, the second display panel 200 includes a plurality of second sub-pixels PX2 located in the second display area AA2, and the same color fill lines represent the same color sub-pixels in fig. 7 and 8. In the first frame region FR1, the scan lines 16 in the 2 nd and 4 th rows are schematically shown in fig. 8 without connecting the scan driving circuit 17, the number of wirings is reduced in this region, the light transmission area can be effectively increased to form a plurality of first light transmission regions FR11, in which first light transmission regions FR11 the light emitted from the second sub-pixels PX2 on the second display panel 200 can be transmitted, that is, in the first light transmission regions FR11, the second sub-pixels PX2 in the 2 nd row and the second sub-pixels PX2 in the 4 th row can be transmitted.
In some embodiments, the scan lines 16 extend along a first direction X and are arranged along a second direction Y, the first direction X intersects the second direction Y, the scan lines 16 alternately connect the scan driving module 171 located in the first frame region FR1 and the scan driving module 171 located in the second frame region FR2, and the scan driving circuit 17 and the first light-transmitting region FR11 are alternately arranged along the second direction Y in the first frame region FR 1. In an embodiment, one scan line 16 is connected to the first sub-pixels PX1 in the same row, the scan driving module 171 connected to the scan line 16 in the odd-numbered row may be disposed in the first frame region FR1, and the scan driving module 171 connected to the scan line 16 in the even-numbered row may be disposed in the second frame region FR2, so that the scan driving circuit 17 and the first light-transmitting region FR11 are alternately disposed in the second direction Y in the first frame region FR 1. Through the above arrangement, the light emitted from the second display panel 200 can uniformly transmit through the first display panel 100, and the display uniformity of the overlapping region can be improved.
Referring to fig. 9 and 10, fig. 9 is a schematic top view of a display module according to another embodiment of the present disclosure, and fig. 10 is a schematic cross-sectional view of the display module according to another embodiment of the present disclosure. Since the entire number of the scan driving modules 171 are dispersedly disposed in the first frame region FR1 and the second frame region FR2, in some embodiments, the second frame region FR2 includes a second light-transmitting region FR21, and the second light-transmitting region FR21 is disposed adjacent to one end of the scan line 16 not connected to the scan driving circuit 17. Through the arrangement, the light transmission area of the second frame region FR2 can be effectively increased, and another display panel can be spliced in the region corresponding to the second frame region FR2 conveniently, so that the display panels can be spliced continuously in rows, and the display module 1000 can be expanded to be larger in 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, the third display panel 300 includes a third display area AA3 and pixels located in a third display area AA3, specifically, the third display panel 300 includes third sub-pixels PX3 located in a third display area AA3, and the third display area overlaps with the second light-transmitting area FR 21; at least a part of the pixels of the third display panel 300 are displayed through the second light transmission region FR 21. As shown in fig. 9, at least a portion of the third subpixel PX3 of the third display panel 300 is displayed through the second light transmission region FR 21.
Since a partial number of the scan driving modules 171 are disposed in the second frame region FR2, and still block a part of the pixels in the third display panel 300, in order to approximate the display effect of the overlapping region and the non-overlapping region of the third display panel 300 and the first display panel 100, in some embodiments, the pixels displayed through the second light-transmitting region FR21 in the third display panel 300 include Micro light emitting diodes (Micro LEDs). The size of the micro light emitting diode is small compared to the size of the organic light emitting diode, and therefore, a larger number of micro light emitting diodes may be disposed 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 transmissive region FR11 include micro light emitting diodes, so as to effectively improve the display effect of the overlapping region of the first display panel 100 and the second display panel 200. In specific implementation, based on the manufacturing temperature of the micro light emitting diode and the manufacturing temperature of the organic light emitting diode, the micro light emitting diode can be manufactured and molded first, and then the organic light emitting diode can be manufactured.
Further, referring to fig. 10, the display module 1000 may further include a fourth adhesive layer 51 and a third protective layer 52 sequentially disposed on the third display panel 300, the first substrate 11 is reused as the third protective layer 52 of the third display panel 300, a display area of the third display panel 300 includes a non-overlapping area that is not overlapped with the first display panel 100, an upper surface of the fourth adhesive layer 51 is coplanar and joined with an upper surface of the first protective layer 22, and in order to improve a display effect of the display module 1000, a combined transmittance of the fourth adhesive layer 51 and the third protective layer 52 is the same as a combined transmittance of the first adhesive layer 21 and the first protective layer 22. Alternatively, the fourth adhesive layer 51 and the third protective layer 52 may be disposed in a manner similar to that of the second adhesive layer 41 and the second protective layer 42 shown in fig. 5, and thus, their description will be omitted.
In summary, the display module 1000 according to the embodiment of the invention includes the first substrate 11, the first display panel 100 formed on the first substrate 11, and the second display panel 200 located under the first substrate 11, wherein the first display panel 100 displays a first portion of an image, and the second display panel 200 displays a second portion of the image, so that the first display panel 100 and the second display panel 200 can be spliced to 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, and compared with the case that two display panels are connected through other connection structures, the display module 1000 according to the embodiment of the invention has a smaller thickness, which is convenient for realizing the lightness and thinness of the display module 1000, so that the structure of the display device is more reasonable. Because the first display panel 100 and the second display panel 200 are not completely overlapped, at this time, the display picture of the second display panel 200 is easily shielded by the first display panel 100, and when the first substrate 11 is a transparent substrate, the first substrate 11 can transmit the light of the second display panel 200 positioned under the first substrate 11, so that the overlapping area between the first display panel 100 and the second display panel 200 is reduced, and the splicing frame of the display module 1000 is reduced.
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 embodiments. According to the display device of the embodiment of the 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, and compared with the case that two display panels are connected through other connection structures, the display module 1000 according to the embodiment of the invention has a smaller thickness, which is convenient for realizing the lightness and thinness of the display module 1000, so that the structure of the display device is more reasonable. Because the first display panel 100 and the second display panel 200 are not completely overlapped, at this time, the display content of the second display panel 200 is easily shielded by the first display panel 100, and when the first substrate 11 is a transparent substrate, the light of the second display panel 200 positioned below the first substrate 11 can also be transmitted, so that the overlapping area between the first display panel 100 and the second display panel 200 is reduced, the splicing frame of the display device is reduced, and the popularization and the application are facilitated.
In accordance with the above embodiments of the present invention, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.

Claims (21)

1. A display module, comprising:
a first substrate;
the display module comprises a first substrate, a first display panel and a second display panel, wherein the first display panel is formed on the first substrate and displays a first part of an image, and a film layer from the upper surface of the first display panel to the upper surface of the display module comprises a first adhesive layer and a first protective layer which are arranged in a stacked mode;
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 film layer between the upper surface of the second display panel and the upper surface of the display module comprises a second bonding layer and a second protective layer which are stacked;
the first display surface of the first display panel and the second display surface of the second display panel are oriented in the same direction,
the first substrate extends to cover the second display panel, the first substrate is reused as the second protective layer of the second display panel, and the first display panel is connected with the second display panel through the first substrate;
the first bonding layer, the first protection layer, the second bonding layer and the second protection layer are respectively a single layer or comprise a plurality of sub-layers which are stacked adjacently or non-adjacently;
the first combined light transmittance of the first protective layer and the first bonding layer is the same as the second combined light transmittance of the second bonding layer and the second protective layer.
2. The display module according to claim 1, wherein an upper surface of the display module in the area corresponding to the first display panel is coplanar with an upper surface of the display module in the area corresponding to the second display panel.
3. The display module of claim 1, wherein the first display panel and the second display panel comprise a film layer.
4. The display module according to claim 3, wherein a film layer from the upper surface of the first display panel to the upper surface of the display module is formed by the first adhesive layer and the first protective layer which are stacked, and the first adhesive layer and the first protective layer are sequentially disposed in a direction away from the first substrate;
and the film layer from the upper surface of the second display panel to the upper surface of the display module is formed by the second bonding layer and the second protective layer which are stacked.
5. The display module according to claim 4, wherein the second adhesive layer is composed of a first adhesive sublayer and a second adhesive sublayer, the first adhesive sublayer is located between the second display panel and the second protective layer, and the second adhesive sublayer is located on a side of the second protective layer facing 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, the second adhesive sub-layer covers the non-overlapping portion,
the upper surface of the first protection layer is in coplanar engagement with the upper surface of the second adhesive sublayer.
7. The display module according to claim 5 or 6, wherein the refractive index of the first protective layer is the same as the refractive index of the second adhesive sublayer.
8. The display module assembly of claim 1, wherein the display module assembly further comprises:
the first bonding layer and the first protective layer are sequentially arranged on the first display panel;
the second bonding layer and the second protective layer are sequentially arranged 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 comprises a third bonding layer positioned on the first substrate, and the third bonding layer covers the non-overlapping area; the upper surface of the third bonding layer is coplanar and jointed with the upper surface of the first protective layer;
the combined light transmittance of the first adhesive layer and the first protective layer is the same as that 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 comprises a non-overlapping area that does not overlap with the first substrate, the second adhesive layer is located in the non-overlapping area, the second adhesive layer is composed of a third adhesive sublayer and a fourth adhesive sublayer,
the third adhesive sublayer is connected between the second protective layer and the second display panel,
the fourth adhesive sublayer is located on the upper surface of the second display panel, and an orthographic projection of the fourth adhesive sublayer on a plane where the second display surface of the second display panel is located is connected between an orthographic projection of the first protective layer on the plane where the second display surface of the second display panel is located and an orthographic projection of the second protective layer on the second display surface of the second display panel.
10. The display module according to claim 9, wherein an orthographic projection of the third adhesive sublayer on the second display surface overlaps with an orthographic projection of the second protective layer on the second display surface,
the combined light transmittance of the third adhesive sublayer and the second protective layer is the same as that of the fourth adhesive sublayer.
11. The display module of claim 9, wherein the upper surface of the first passivation layer, the upper surface of the fourth adhesive sublayer, and the upper surface of the second passivation layer are coplanar and contiguous.
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 sublayer and the refractive index of the second protective layer are the same.
13. The display module of claim 1, wherein the first display panel has a first display region and a first non-display region disposed at an outer peripheral side of the first display region, the second display panel has a second display region,
the first non-display area comprises an overlapping area, the overlapping area overlaps with the second display area, and the overlapping area can transmit light so that light emitted by the second display panel can transmit through 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 disposed opposite to each other along a first direction, the display panel comprises a plurality of scan lines and a scan driving circuit, the scan driving circuit comprises a plurality of scan driving modules, each of the scan lines receives a signal via one of the scan driving modules,
and part of the scanning driving module is positioned in the first frame area, and part of the scanning driving module is positioned 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 comprising a first transparent area, the first transparent area being disposed adjacent to an end of the scan line not connected to the scan driving circuit.
16. The display module of claim 15, wherein the scan lines extend along a first direction and are arranged along a second direction, the first direction intersects the second direction, the plurality of scan lines alternately connect the scan driving module located in the first frame region and the scan driving module located in the second frame region,
in the first frame area, the scan driving circuit and the first light-transmitting area are alternately arranged along the second direction.
17. The display module of claim 14, wherein the second frame region comprises a second transparent region, and the second transparent region is disposed adjacent to an end of the scan line not connected to the scan driving circuit.
18. The display module assembly of claim 17, wherein the display module assembly further comprises:
a third display panel positioned under the first substrate, the third display panel including a third display region and pixels positioned in the third display region, the third display region overlapping the second light-transmitting region;
at least 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 the pixels displayed through the second transparent region in the third display panel comprise micro light emitting diodes.
20. The display module of claim 1, wherein the first display panel and the second display panel are both OLED 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.
CN202010614931.6A 2020-06-30 2020-06-30 Display module and display device Active CN111640377B (en)

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