CN113281928A - Display panel, manufacturing method thereof and display device - Google Patents
Display panel, manufacturing method thereof and display device Download PDFInfo
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- CN113281928A CN113281928A CN202010104611.6A CN202010104611A CN113281928A CN 113281928 A CN113281928 A CN 113281928A CN 202010104611 A CN202010104611 A CN 202010104611A CN 113281928 A CN113281928 A CN 113281928A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
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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
- G09F9/33—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
Abstract
The invention discloses a display panel, a manufacturing method thereof and a display device, and belongs to the technical field of display, wherein the display panel comprises a main display area and an extended display area, and in the range of the main display area, the display panel comprises a first substrate, a second substrate and a liquid crystal layer which are oppositely arranged, and the second substrate comprises a color resistance layer; in the range of the extended display area, the display panel comprises a third substrate, a frame glue layer and a fourth substrate, the first substrate is reused as the third substrate, one side, far away from the frame glue layer, of the fourth substrate is provided with a driving circuit and a Micro LED substrate which are electrically connected, and the substrate is located on one side, far away from the fourth substrate, of the Micro LEDs. The manufacturing method of the display panel is used for manufacturing the display panel. The display device comprises the display panel. The display panel can realize narrower frame display and even full-screen frame-free display, has no requirement on size, has low requirement on the development cost of products, and has high feasibility of mass production.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a manufacturing method of the display panel and a display device.
Background
In recent years, with the advance of technology, many different Display devices, such as Liquid Crystal Display (LCD) or electroluminescence Display (ELD) Display devices, have been widely used for flat panel displays. Taking the lcd as an example, most of the lcds are backlight lcds, which are composed of an lcd panel and a backlight module (backlight module). The liquid crystal display panel is composed of two transparent substrates and liquid crystal sealed between the substrates. With the rapid development of wearable display devices, Micro light emitting diode (Micro LED, uLED) technology has emerged. Micro LED technology, i.e. LED scaling and matrixing, refers to a high density Micro-sized LED array integrated on one chip. The power consumption of the Micro LED is much smaller than that of a Liquid Crystal Display (LCD), and the Micro LED is self-luminous like an Organic Light-Emitting Diode (OLED), and can reduce the distance between pixels from millimeter level to micrometer level, and the color saturation is close to that of the OLED.
However, in the LCD display device in the prior art, the liquid crystal needs to be encapsulated between the two transparent substrates by using the sealant, and the glass frame always exists, so that the frame cannot be further reduced or even no frame exists; however, with the increase of size and power consumption, the requirement on the huge transfer technology is higher and higher, the difficulty is higher and higher, and the Micro LED display device is limited by size, high cost, and mass production cannot be realized by the Micro process technology and the huge transfer technology at present.
Therefore, it is an urgent need to provide a display panel, a method for manufacturing the same, and a display device, which can achieve narrower-frame or even full-screen frameless display, have no requirement for size, have low requirement for product development cost, and have high feasibility for mass production.
Disclosure of Invention
In view of the above, the present invention provides a display panel, a manufacturing method thereof, and a display device, so as to solve the problems that in the existing display technology, a frame cannot be further reduced or even no frame is provided, and even if the frame can be realized, the size is limited, the cost is high, and mass production cannot be realized.
The present invention provides a display panel, comprising: the main display area and the extended display area are positioned on at least one side of the periphery of the main display area along the direction parallel to the light-emitting surface of the display panel; in the range of the main display area, along the direction vertical to the light-emitting surface of the display panel, the display panel comprises a first substrate, a second substrate and a liquid crystal layer, wherein the first substrate and the second substrate are oppositely arranged, the liquid crystal layer is positioned between the first substrate and the second substrate, the first substrate is positioned on one side of the second substrate, which is far away from the light-emitting surface of the display panel, and the second substrate comprises a color resistance layer; in the range of the extended display area, along the direction vertical to the light-emitting surface of the display panel, the display panel comprises a third substrate, a frame adhesive layer and a fourth substrate, wherein the first substrate is reused as the third substrate, the frame adhesive of the frame adhesive layer is arranged around the liquid crystal layer, and the fourth substrate is positioned on one side of the frame adhesive layer away from the third substrate; one side of the fourth base plate, which is far away from the frame glue layer, is provided with a driving circuit and a Micro LED base plate which are electrically connected, the Micro LED base plate comprises a substrate base plate and a plurality of Micro LEDs which are located on one side of the substrate base plate, the driving circuit is used for driving the plurality of Micro LEDs to emit light, and the substrate base plate is located on one side, far away from the fourth base plate, of the plurality of Micro LEDs.
Based on the same inventive concept, the invention also provides a manufacturing method of the display panel, which is used for manufacturing the display panel; the manufacturing method at least comprises the following steps: providing an array substrate, wherein the array substrate comprises a main display area and an expanded display area, and the expanded display area is positioned on at least one side of the periphery of the main display area along the direction parallel to the light-emitting surface of the display panel; the array substrate in the range of the main display area is used as a first substrate, and the array substrate in the range of the expanded display area is used as a third substrate; providing a color film substrate, wherein the color film substrate comprises a main display area and an extended display area, the color film substrate and the array substrate in the extended display area range are attached through frame glue of a frame glue layer, and a liquid crystal layer is filled between the array substrate and the color film substrate in the main display area range; cutting off the color film substrate in the range of the expanded display area, and using the residual color film substrate as a second substrate; providing at least one Micro LED module in the range of the expanded display area, wherein the Micro LED module comprises a fourth substrate, the surface of the fourth substrate is provided with a driving circuit and a plurality of Micro LEDs, and the driving circuit is used for driving the plurality of Micro LEDs to emit light; a substrate base plate is arranged on one side, away from the fourth base plate, of the Micro LEDs; the surface of one side of the fourth substrate, which is close to the third substrate, is attached to the frame adhesive layer, and the side of the fourth substrate, which is vertical to the light-emitting surface of the display panel, is attached to the side of the second substrate, which is vertical to the light-emitting surface of the display panel, through transparent adhesive; the surface of the substrate far away from the fourth substrate and the surface of the second substrate far away from the first substrate are on the same horizontal plane.
Based on the same inventive concept, the invention also provides a manufacturing method of the display panel, which is used for manufacturing the display panel; the manufacturing method at least comprises the following steps: providing an array substrate, wherein the array substrate comprises a main display area and an expanded display area, and the expanded display area is positioned on at least one side of the periphery of the main display area along the direction parallel to the light-emitting surface of the display panel; the array substrate in the range of the main display area is used as a first substrate, and the array substrate in the range of the expanded display area is used as a third substrate; providing a color film substrate, wherein the color film substrate comprises a main display area and an extended display area, the color film substrate and the array substrate in the extended display area range are attached through frame glue of a frame glue layer, and a liquid crystal layer is filled between the array substrate and the color film substrate in the main display area range; the color film substrate in the range of the expanded display area is used as a fifth substrate, and the color film substrate in the range of the main display area is used as a second substrate; providing at least one Micro LED module in the range of the expanded display area, wherein the Micro LED module comprises a fourth substrate, the surface of the fourth substrate is provided with a driving circuit and a plurality of Micro LEDs, and the driving circuit is used for driving the plurality of Micro LEDs to emit light; a substrate base plate is arranged on one side, away from the fourth base plate, of the Micro LEDs; the surface of the fourth substrate close to one side of the third substrate is attached to the surface of the fifth substrate.
Based on the same inventive concept, the invention also provides a display device, which comprises the display panel.
Compared with the prior art, the display panel, the manufacturing method thereof and the display device provided by the invention at least realize the following beneficial effects:
according to the display panel provided by the invention, the Micro LED-based display module and the liquid crystal-based display module are combined, so that the frame on at least one side of the original liquid crystal display panel can be reduced, and even when the extended display area is arranged on the periphery of the main display area along the direction parallel to the light-emitting surface of the display panel, the frameless full-screen display can be realized. Because the display module based on the liquid crystal in the range of the main display area of the invention has low manufacturing cost, good display effect and mature technology, the expanded display area is only arranged at the outer side of the main display area, the area occupation is less, the requirements on Micro LED Micro process technology and mass transfer technology are low, thereby not only overcoming the problems that the liquid crystal in the original liquid crystal display panel needs to be encapsulated between two substrates by using frame glue and the glass frame always exists, but also integrating the Micro LED technology into the existing mature liquid crystal display technology, because the liquid crystal display technology and the Micro LED display technology respectively belong to the mature technology in the display industry, the process difficulty of the display panel of the invention is relatively low, the display module based on the Micro LED can realize full screen frameless display only by being attached to the side surface or the upper surface of a cut color film substrate (the second substrate comprising the color resistance layer of the invention), the size is not required, the development cost requirement on the product is low, and the possibility of mass production is easier to realize.
Of course, it is not necessary for any product in which the present invention is practiced to specifically achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic plan view of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic sectional view taken along line A-A' of FIG. 1;
FIG. 3 is a schematic plan view of another display panel according to an embodiment of the present invention;
FIG. 4 is a schematic view of another cross-sectional structure taken along line A-A' of FIG. 1;
FIG. 5 is a schematic view of another cross-sectional structure taken along line A-A' of FIG. 1;
FIG. 6 is a schematic view of another cross-sectional structure taken along line A-A' of FIG. 1;
FIG. 7 is a schematic diagram of a planar structure of another display panel according to an embodiment of the present invention;
FIG. 8 is a flowchart of a method for fabricating a display panel according to an embodiment of the present invention;
fig. 9 is a schematic cross-sectional view of the display panel after step S1 in fig. 8 is completed;
fig. 10 is a schematic cross-sectional view of the display panel after step S2 in fig. 8 is completed;
fig. 11 is a schematic cross-sectional view of the display panel after step S3 in fig. 8 is completed;
fig. 12 is a schematic cross-sectional view of the display panel after step S4 in fig. 8 is completed;
fig. 13 is a schematic cross-sectional view of the display panel after step S5 in fig. 8 is completed;
fig. 14 is a schematic cross-sectional view of the display panel after step S6 in fig. 8 is completed;
FIG. 15 is a flow chart of another method for fabricating a display panel according to an embodiment of the present invention;
fig. 16 is a schematic cross-sectional view of the display panel after step Q2 in fig. 15 is completed;
fig. 17 is a schematic cross-sectional view of the display panel after step Q3 in fig. 15 is completed;
fig. 18 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic plan view of a display panel according to an embodiment of the present invention, fig. 2 is a schematic sectional view taken along a direction a-a' of fig. 1, and a display panel 000 according to an embodiment of the present invention includes: the main display area AA1 and the extended display area AA2 are located on at least one side of the periphery of the main display area AA1 along a direction parallel to the light-emitting surface of the display panel 000 (for better understanding of the technical solution of the embodiment, the embodiment takes the example that the extended display areas AA2 are disposed on both sides of the periphery of the main display area AA1 along the direction parallel to the light-emitting surface of the display panel 000);
in the range of the main display area AA1, along a direction Z perpendicular to the light emitting surface E of the display panel 000, the display panel 000 includes a first substrate 10 and a second substrate 20 that are disposed opposite to each other, and a liquid crystal layer 30 located between the first substrate 10 and the second substrate 20, the first substrate 10 is located on a side of the second substrate 20 away from the light emitting surface E of the display panel 000, and the second substrate 20 includes a color-resist layer 201;
in the extended display area AA2, along a direction Z perpendicular to the light emitting surface E of the display panel 000, the display panel 000 includes a third substrate 40, a frame adhesive layer 50, and a fourth substrate 60, the first substrate 10 is reused as the third substrate 40, the sealant of the frame adhesive layer 50 is disposed around the liquid crystal layer 30, and the fourth substrate 60 is located on a side of the frame adhesive layer 50 away from the third substrate 40;
a driving circuit (not shown in the figure) and a Micro LED substrate 70 which are electrically connected are arranged on one side of the fourth substrate 60 away from the frame adhesive layer 50, the Micro LED substrate 70 includes a substrate 701 and a plurality of Micro LEDs 702 arranged in an array and located on one side of the substrate 701, the driving circuit is used for driving the plurality of Micro LEDs 702 to emit light, and the substrate 701 is located on one side of the plurality of Micro LEDs 702 away from the fourth substrate 60.
Specifically, in the display panel 000 of the embodiment of the invention, in a direction parallel to the light emitting surface of the display panel 000, at least one side of the periphery of the main display area AA1 is provided with an extended display area AA2, and in a direction Z perpendicular to the light emitting surface E of the display panel 000, the display panel 000 within the range of the main display area AA1 includes a first substrate 10 and a second substrate 20 which are oppositely disposed, and a liquid crystal layer 30 located between the first substrate 10 and the second substrate 20, the first substrate 10 is located on a side of the second substrate 20 away from the light emitting surface E of the display panel 000, and the second substrate 20 includes a color-resist layer 201, that is, the display panel 000 within the range of the main display area AA1 is a liquid crystal-based display module; the display panel 000 in the extended display area AA2 includes a third substrate 40, a frame adhesive layer 50, and a fourth substrate 60, the first substrate 10 is reused as the third substrate 40, the frame adhesive of the frame adhesive layer 50 is disposed around the liquid crystal layer 30, the fourth substrate 60 is located on one side of the frame adhesive layer 50 away from the third substrate 40, and one side of the fourth substrate 60 away from the frame adhesive layer 50 is provided with a driving circuit and a Micro LED substrate 70 which are electrically connected, the Micro LED substrate 70 includes a substrate 701 and a plurality of Micro LEDs 702 located on one side of the substrate 701, the driving circuit is used for driving the plurality of Micro LEDs 702 to emit light, wherein the substrate 701 is located on one side of the plurality of Micro LEDs 702 away from the fourth substrate 60, that is, the display panel 000 in the extended display area AA2 is a display module based on Micro LEDs. The display principle of the Micro LED-based display module is to thin, miniaturize and array the LED structure design, the size of the display module is only about 1-10 μm, then a plurality of Micro LEDs 702 of the Micro LED substrate 70 are transferred to the third substrate 40 in batch mode, the third substrate 40 can be a hard and soft (transparent and non-transparent) substrate, then a physical deposition process is utilized to complete a protective layer and an upper electrode, the Micro LED display module with a simple structure can be packaged, a display is manufactured, the surface of the third substrate 40 has to be manufactured into an array structure like an LED display, and each point pixel can be controlled and independently driven to be lightened. In the display panel 000 provided in this embodiment, the Micro LED-based display module is combined with the liquid crystal-based display module, so that a frame on at least one side of the original liquid crystal display panel can be reduced, and even when the extended display area AA2 is disposed on the periphery of the main display area AA1 along a direction parallel to the light emitting surface of the display panel 000, a full-screen display without a frame can be realized. Because the liquid crystal-based display module in the range of the main display area AA1 of this embodiment has low manufacturing cost, good display effect and mature technology, and the extended display area AA2 is only arranged at the outer side of the main display area AA1, which occupies a small area, and has low requirements on Micro LED Micro process technology and mass transfer technology, the problems that the liquid crystal in the original liquid crystal display panel needs to be sealed between two substrates by using frame glue and the glass frame always exists are overcome, and the Micro LED technology is integrated into the existing mature liquid crystal display technology, because the liquid crystal display technology and the Micro LED display technology respectively belong to mature technologies in the display industry, the process difficulty of the display panel 000 in this embodiment is relatively low, the Micro LED-based display module only needs to be attached to the side or top of the cut color film substrate (the second substrate 20 including the color resist layer 201 of this embodiment) to realize full-screen display, the size is not required, the development cost requirement on the product is low, and the possibility of mass production is easier to realize.
It should be noted that fig. 2 of this embodiment only schematically illustrates the structure of the liquid crystal-based display module in the main display area AA1 and the structure of the Micro LED-based display module in the extended display area AA2, in a specific implementation, the structure of the liquid crystal-based display module in the main display area AA1 is not limited thereto, but may also include other structures capable of implementing a liquid crystal display function, such as a polarizer, a thin film transistor of an array structure, and the like, and the structure of the Micro LED-based display module in the extended display area AA2 is not limited thereto, and may also include other structures capable of implementing a display function of the Micro LED, which is not described herein again.
It should be further noted that, as shown in fig. 2, the Micro LED substrate 70 of this embodiment may be a PET (polyethylene terephthalate) substrate, and the thickness selection space is large, and the thickness of the PET substrate may be adjusted according to the thickness of a color film substrate (the second substrate 20 including the color resist layer 201 of this embodiment), so that the total thickness of the film layers of the manufactured display panel 000 in the ranges of the main display area AA1 and the extended display area AA2 is substantially consistent; alternatively, the surface of the Micro LED substrate 70 may be sealed to make the total thickness of the film layer in the main display area AA1 and the extended display area AA2 consistent, which is not limited in this embodiment. The liquid crystal-based display module and the Micro LED-based display module of this embodiment each have a separate driving structure, for example, the driving structure of the liquid crystal-based display module may be disposed on a side of the first substrate 10 (equivalent to the array substrate) close to the liquid crystal layer 30, and the driving circuit of the Micro LED-based display module may be disposed on a side of the fourth substrate 60 close to the Micro LED substrate 70, and may be of other design structures, only that the two are driven separately to achieve the display effect.
In some alternative embodiments, please refer to fig. 3, fig. 3 is a schematic plane structure diagram of another display panel 000 according to an embodiment of the present invention, in which the extended display area AA2 is disposed around the main display area AA 1.
The present embodiment further explains that when the extended display area AA2 is disposed around the main display area AA1 in a direction parallel to the light emitting surface of the display panel 000, that is, the extended display area AA2 is disposed on the periphery of the main display area AA1, the display panel 000 of the present embodiment can better realize full-screen display without a bezel.
In some alternative embodiments, referring to fig. 1 and fig. 4, fig. 4 is another schematic sectional view along the direction a-a' of fig. 1, in which a side surface of the fourth substrate 60 perpendicular to the light emitting surface E of the display panel 000 and a side surface of the second substrate 20 perpendicular to the light emitting surface E of the display panel 000 are attached to each other through the transparent adhesive 80.
The embodiment further explains that when the Micro LED-based display module is attached to the side of the cut color film substrate (the second substrate 20 including the color resist layer 201 of the embodiment), the side of the fourth substrate 60 perpendicular to the light emitting surface E of the display panel 000 and the side of the second substrate 20 perpendicular to the light emitting surface E of the display panel 000 need to be attached to each other through the transparent adhesive 80, so that a better fixing effect is achieved, and meanwhile, a good light transmittance performance can be maintained, which is beneficial to improving the display quality of the whole display panel 000, and the problem of display quality reduction caused by the black line shadow generated at the attached part of the Micro LED-based display module and the liquid crystal-based display module is avoided. In addition, in the manufacturing process of the display panel 000 of this embodiment, after the color filter substrate (the second substrate 20 including the color resist layer 201 of this embodiment) of the display module based on the Micro LED is cut, the side surface of the fourth substrate 60 is attached and fixed to the side surface of the second substrate 20 through the transparent adhesive 80, so that the display pixels of the display module based on the Micro LED can be basically seamlessly spliced with the display pixels of the color filter substrate, and the display effect is finer.
In some alternative embodiments, with continuing reference to fig. 2 and fig. 4, in the present embodiment, a surface M of the substrate base 701 away from the fourth base 60 is on the same horizontal plane as a surface N of the second base 20 away from the first base 10.
This embodiment further explains that in order to make the film thickness of the whole display panel 000 substantially uniform and achieve better flatness, the surface M of the substrate base 701 on the side away from the fourth base plate 60 and the surface N of the second base plate 20 on the side away from the first base plate are on the same horizontal plane. In order to realize that the surface M of the substrate base 701 away from the fourth base 60 and the surface N of the second base 20 away from the first base are on the same horizontal plane, the Micro LED base 70 may be designed to be a PET (polyethylene terephthalate) base, the thickness selection space of the PET base is large, and further, the thickness of the PET base may be adjusted according to the thickness of a color filter base (the second base 20 including the color resist layer 201 in this embodiment), so that the surface M of the substrate base 701 away from the fourth base 60 and the surface N of the second base 20 away from the first base 10 are on the same horizontal plane; alternatively, the surface of the Micro LED substrate 70 may be sealed such that the surface M of the substrate 701 away from the fourth substrate 60 and the surface N of the second substrate 20 away from the first substrate are on the same horizontal plane.
It should be noted that, this embodiment is only an example of a structure that a surface M of the substrate base 701 away from the fourth base 60 and a surface N of the second base 20 away from the first base are on the same horizontal plane, but the present invention is not limited thereto, and other structures that can achieve the same effect may also be used, and the present embodiment is not described herein again.
In some alternative embodiments, referring to fig. 1 and fig. 5, fig. 5 is another schematic sectional view taken along the direction a-a' of fig. 1, in this embodiment, within the range of the extended display area AA2, a fifth substrate 90 is further included between the frame adhesive layer 50 and the fourth substrate 60, the second substrate 20 is reused as the fifth substrate 90, and the fourth substrate 60 is located on a side of the fifth substrate 90 away from the third substrate 40.
The embodiment further explains that another display module based on Micro LEDs is combined with a display module based on liquid crystal to realize a structure of borderless full-screen display, the display module based on Micro LEDs may be directly attached to the top of a color film substrate (the second substrate 20 including the color resist layer 201 in this embodiment) of a manufactured liquid crystal display module, that is, in the range of the extended display area AA2, a fifth substrate 90 is further included between the frame glue layer 50 and the fourth substrate 60, the second substrate 20 extends to the range of the extended display area AA2 and is reused as the fifth substrate 90, the fourth substrate 60 is located on a side of the fifth substrate 90 away from the third substrate 40, at this time, the fourth substrate 60 is directly attached to the extended second substrate 20, and the Micro LED substrate 70 is located on a side of the fourth substrate 60 away from the second substrate 20. The display panel 000 of the embodiment can realize narrow-frame or even frameless display, and the display module based on the Micro LED can be directly attached to the liquid crystal display module after the liquid crystal display module is manufactured, so that the mass production performance is higher, and the efficiency is higher.
It should be noted that, in the display panel 000 of this embodiment, the Micro LED-based display module is directly attached to the color filter substrate (the second substrate 20 including the color resist layer 201 of this embodiment) after the liquid crystal display module is manufactured, and a surface M of the substrate 701 on a side away from the fourth substrate 60 and a surface N of the second substrate 20 on a side away from the first substrate 10 may not be on the same horizontal plane, at this time, a sealant may be filled on the surface N of the second substrate 20 on a side away from the first substrate 10 within the range of the main display area AA1, so that the total thicknesses of the films of the manufactured display panel 000 in the ranges of the main display area AA1 and the extended display area AA2 are substantially the same.
In some optional embodiments, please refer to fig. 1 and fig. 6, fig. 6 is another schematic sectional view along the direction a-a' of fig. 1, in this embodiment, the display panel 000 further includes a backlight module 100, the backlight module 100 is located on a side of the first substrate 10 away from the light emitting surface E of the display panel 000, a lower polarizer 200 is disposed between the backlight module 100 and the first substrate 10, and an upper polarizer 300 is disposed on a side of the second substrate 20 away from the first substrate 10.
This embodiment further explains that since the liquid crystal display is a passive type display mode, it cannot emit light by itself, and it is necessary to achieve the purpose of display by modulating external light. Therefore, the backlight is important in the liquid crystal display mode. The backlight module 100 of the present embodiment is one of the key components of the liquid crystal display panel, and its main function is to provide a uniform and high-brightness light emitter for the liquid crystal display panel, and the basic principle is to convert the commonly used point or linear light emission into a high-brightness and uniform gray surface light emission, so that the liquid crystal display panel can normally display images. The lower polarizer 200 is disposed between the backlight module 100 and the first substrate 10, and the upper polarizer 300 is disposed on the side of the second substrate 20 away from the first substrate 10, and is called a polarizer, which can control the polarization direction of the specific light beam. In this embodiment, the lower polarizer 200 is used to convert the light beam generated by the backlight module 100 into polarized light, and the upper polarizer 300 is used to analyze the polarized light after being electrically modulated by the liquid crystal to generate contrast, so as to generate a display image on the light emitting surface E of the display panel 000.
It should be noted that fig. 6 of the present embodiment only schematically illustrates a partial structure of the backlight module 100, it can be understood that the backlight module 100 may be any one of a direct-type backlight module or a side-type backlight module, the backlight module 100 may include structures such as a light guide plate, a reflective sheet, a housing for accommodating a light source, a light guide plate, and an optical film, and other structures such as a light shielding adhesive may be included between the backlight module 100 and the display panel 000, and the structure of the backlight module of the present embodiment can be understood through a side-type backlight module or a direct-type backlight module in the prior art, which is not described herein again.
In some alternative embodiments, with continuing reference to fig. 1 and fig. 3, in this embodiment, the main display area AA1 includes a plurality of first pixels PX1, the extended display area AA2 includes a plurality of second pixels PX2, and a forward projection area of the first pixels PX1 to the light-emitting surface E of the display panel 000 is the same as a forward projection area of the second pixels PX2 to the light-emitting surface E of the display panel 000.
The present embodiment further explains that the forward projection areas of the first pixel PX1 located within the range of the main display area AA1 and the second pixel PX2 located within the range of the extended display area AA2 to the light emitting surface E of the display panel 000 are the same, so that the display in the main display area AA1 and the extended display area AA2 can be made more uniform without affecting the display effect due to the difference in the display modes.
In some optional embodiments, please refer to fig. 7, where fig. 7 is a schematic plan view illustrating another display panel according to an embodiment of the present invention, in this embodiment, the display panel 000 further includes a chip bonding area BA, and the chip bonding area BA and the extended display area AA2 are at least partially overlapped along a direction perpendicular to the light emitting surface E of the display panel 000.
The present embodiment further illustrates that a driving Circuit required for integrating the display panel 000 may be a driving chip 400 (IC), the driver Chip 400 can be directly bonded to the Glass substrate by COG (Chip On Glass, which can greatly reduce the size of the LCD module and is easy for mass production) or COF (Chip On Flex, or, Chip On Film, commonly called as a Chip On Film, a technology for mounting a driver Chip On a flexible circuit board by a die-On-Film package, which is a technology for bonding a Chip and a flexible substrate circuit by using a flexible additional circuit board as a package Chip carrier) within the BA range of the Chip bonding area of the display panel 000, and is electrically connected to signal lines (not shown) in the display panel 000, such as scan lines and data lines, to provide driving signals for the display panel 000 to perform display functions. The chip binding area BA and the extended display area AA2 are at least partially overlapped in the direction perpendicular to the light emitting surface E of the display panel 000, so that the display area of the display panel 000 can be further increased, and the Micro LED display module in the range of the extended display area AA2 is provided with an independent driving circuit for driving and displaying, so that the chip binding area BA and the extended display area AA2 are at least partially overlapped without affecting the display effect of the liquid crystal display module, the frame of the display panel 000 can be further reduced, and the frameless full-screen display can be more favorably realized.
In some optional embodiments, please refer to fig. 8, fig. 8 is a flowchart of a manufacturing method of a display panel according to an embodiment of the present invention, the manufacturing method in the embodiment is used for manufacturing the display panel shown in fig. 4, and the manufacturing method at least includes:
s1: providing an array substrate 01, wherein the array substrate 01 comprises a main display area AA1 and an expanded display area AA2, and the expanded display area AA2 is positioned on at least one side of the periphery of the main display area AA1 along the direction parallel to the light-emitting surface of the display panel;
as shown in fig. 9, the array substrate 01 in the main display area AA1 is used as the first substrate 10, and the array substrate 01 in the extended display area AA2 is used as the third substrate 40, where fig. 9 is a schematic cross-sectional structure diagram of the display panel after the step S1 in fig. 8 is completed;
s2: providing a color film substrate 02, optionally, the color film substrate includes a color resist layer 201, the color film substrate 02 includes a main display area AA1 and an extended display area AA2, the color film substrate 02 and the array substrate 01 within the extended display area AA2 are attached to each other through frame glue of a frame glue layer 50, and a liquid crystal layer 30 is filled between the array substrate 01 and the color film substrate 02 within the main display area AA1, as shown in fig. 10, fig. 10 is a schematic cross-sectional structure diagram of the display panel after the step S2 in fig. 8 is completed;
s3: cutting off the color filter substrate 02 in the extended display area AA2, and using the remaining color filter substrate 02 as the second substrate 20, as shown in fig. 11, where fig. 11 is a schematic cross-sectional structure diagram of the display panel after the step S3 in fig. 8 is completed;
s4: providing at least one Micro LED module 03 in the range of the extended display area AA2, wherein the Micro LED module 03 comprises a fourth substrate 60, and a driving circuit (not shown) and a plurality of Micro LEDs 702 are arranged on the surface of the fourth substrate 60, and the driving circuit is used for driving the plurality of Micro LEDs 702 to emit light; a substrate base plate 701 is disposed on a side of the Micro LEDs 702 away from the fourth base plate 60, as shown in fig. 12, fig. 12 is a schematic cross-sectional structure diagram of the display panel after step S4 in fig. 8 is completed;
s5: the surface of the fourth substrate 60 close to the third substrate 40 is attached to the frame adhesive layer 50, the side of the fourth substrate 60 perpendicular to the light-emitting surface E of the display panel and the side of the second substrate 20 perpendicular to the light-emitting surface of the display panel are attached to each other through a transparent adhesive 80, as shown in fig. 13, where fig. 13 is a schematic cross-sectional structure diagram of the display panel after the step S5 in fig. 8 is completed;
s6: as shown in fig. 14, a surface M of the substrate base 701 away from the fourth base 60 is on the same horizontal plane as a surface N of the second base 20 away from the first base 10, and fig. 14 is a schematic cross-sectional structure diagram of the display panel after step S6 in fig. 8 is completed.
In this embodiment, a manufacturing method of the display panel shown in fig. 4 is further explained, after the color film substrate 02 is cut, the Micro LED module 03 is directly attached to the side surface of the cut color film substrate, that is, the side surface of the fourth substrate 60 perpendicular to the light emitting surface E of the display panel 000 and the side surface of the second substrate 20 perpendicular to the light emitting surface E of the display panel 000 need to be attached to each other through the transparent adhesive 80, so that a better fixing effect is achieved, and meanwhile, a good light transmittance performance can be maintained, which is beneficial to improving the display quality of the whole display panel 000, and the problem of display quality reduction caused by black line shadow generated at the attached portion of the Micro LED-based display module and the liquid crystal-based display module is avoided. In addition, in the manufacturing process of the display panel 000 of this embodiment, after the color filter substrate 03 is cut, the Micro LED module 03 attaches and fixes the side surface of the fourth substrate 60 to the side surface of the second substrate 20 through the transparent adhesive 80, so that the display pixels of the Micro LED module 03 can be basically seamlessly spliced with the display pixels of the color filter substrate, and the display effect is finer.
In some optional embodiments, please refer to fig. 15, fig. 15 is a flowchart of another manufacturing method of the display panel according to the embodiment of the present invention, the manufacturing method in the embodiment is used for manufacturing the display panel shown in fig. 5, and the manufacturing method at least includes:
q1: providing an array substrate 01, wherein the array substrate 01 comprises a main display area AA1 and an expanded display area AA2, and the expanded display area AA2 is positioned on at least one side of the periphery of the main display area AA1 along the direction parallel to the light-emitting surface of the display panel;
referring to fig. 9, step S1 in fig. 8 is the same as step Q1 of the manufacturing method of this embodiment, in which the array substrate 01 in the range of the main display area AA1 is used as the first substrate 10, and the array substrate 01 in the range of the extended display area AA2 is used as the third substrate 40;
q2: providing a color film substrate 02, wherein the color film substrate 02 comprises a main display area AA1 and an extended display area AA2, the color film substrate 02 and the array substrate 01 in the range of the extended display area AA2 are attached through frame glue of a frame glue layer 50, and a liquid crystal layer 30 is filled between the array substrate 01 and the color film substrate 02 in the range of the main display area AA 1; as shown in fig. 16, the color filter substrate 02 in the extended display area AA2 is used as the fifth substrate 90, and the color filter substrate 02 in the main display area AA1 is used as the second substrate 20, where fig. 16 is a schematic cross-sectional structure diagram of the display panel after the step Q2 in fig. 15 is completed;
q3: providing at least one Micro LED module 03 in the range of the expanded display area AA2, wherein the Micro LED module 03 comprises a fourth substrate 60, the surface of the fourth substrate 60 is provided with a driving circuit and a plurality of Micro LEDs 702, and the driving circuit is used for driving the plurality of Micro LEDs 702 to emit light; a substrate base plate 701 is arranged on one side, away from the fourth base plate 60, of the Micro LEDs 702;
as shown in fig. 17, a surface of the fourth substrate 60 close to the third substrate 40 is attached to a surface of the fifth substrate 90, and fig. 17 is a schematic cross-sectional structure diagram of the display panel after the step Q3 in fig. 15 is completed.
In this embodiment, a manufacturing method of the display panel shown in fig. 5 is further explained, in which the Micro LED module 03 is directly attached to the top surface of the color film substrate 02 of the manufactured liquid crystal display module, that is, within the range of the extended display area AA2, a fifth substrate 90 is further included between the frame glue layer 50 and the fourth substrate 60, the second substrate 20 is extended to the range of the extended display area AA2 and used as the fifth substrate 90, the fourth substrate 60 is located on a side of the fifth substrate 90 away from the third substrate 40, at this time, the fourth substrate 60 is directly attached to the extended second substrate 20, and the Micro LED substrate 70 of the Micro LED module 03 is located on a side of the fourth substrate 60 away from the second substrate 20. The display panel 000 of the embodiment can realize narrow-frame or even frameless display, and the display module based on the Micro LED can be directly attached to the liquid crystal display module after the liquid crystal display module is manufactured, so that the mass production performance is higher, and the efficiency is higher.
The method for manufacturing the display panel 000 of this embodiment may further include a step of filling a sealant on the surface N of the second substrate 20 away from the first substrate 10 within the range of the main display area AA1, so that the total thickness of the film layers of the manufactured display panel 000 within the ranges of the main display area AA1 and the extended display area AA2 is substantially consistent. Since the Micro LED module 03 is directly attached to the color filter substrate 02 after the liquid crystal display module is manufactured, the surface M of the substrate 701 away from the fourth substrate 60 and the surface N of the second substrate 20 away from the first substrate 10 may not be on the same horizontal plane, and at this time, the sealant may be filled on the surface N of the second substrate 20 away from the first substrate 10 within the range of the main display area AA1, so that the total thicknesses of the film layers of the manufactured display panel 000 within the ranges of the main display area AA1 and the extended display area AA2 are substantially the same.
In some optional embodiments, please refer to fig. 18, fig. 18 is a schematic structural diagram of a display device according to an embodiment of the present invention, and the display device 111 according to this embodiment includes the display panel 000 according to the above embodiment of the present invention, and can be manufactured by using the manufacturing method according to the above embodiment. The embodiment of fig. 18 is only an example of a mobile phone, and the display device 111 is described, it is understood that the display device 111 provided in the embodiment of the present invention may be another display device 111 having a display function, such as a computer, a television, and a vehicle-mounted display device, and the present invention is not limited thereto. The display device 111 provided in the embodiment of the present invention has the beneficial effects of the display panel 000 and the manufacturing method thereof provided in the embodiment of the present invention, and specific descriptions of the display panel 000 and the manufacturing method thereof in the above embodiments may be specifically referred to, and details of the embodiment are not repeated herein.
As can be seen from the above embodiments, the display panel, the manufacturing method thereof, and the display device provided by the present invention at least achieve the following beneficial effects:
according to the display panel provided by the invention, the Micro LED-based display module and the liquid crystal-based display module are combined, so that the frame on at least one side of the original liquid crystal display panel can be reduced, and even when the extended display area is arranged on the periphery of the main display area along the direction parallel to the light-emitting surface of the display panel, the frameless full-screen display can be realized. Because the display module based on the liquid crystal in the range of the main display area of the invention has low manufacturing cost, good display effect and mature technology, the expanded display area is only arranged at the outer side of the main display area, the area occupation is less, the requirements on Micro LED Micro process technology and mass transfer technology are low, thereby not only overcoming the problems that the liquid crystal in the original liquid crystal display panel needs to be encapsulated between two substrates by using frame glue and the glass frame always exists, but also integrating the Micro LED technology into the existing mature liquid crystal display technology, because the liquid crystal display technology and the Micro LED display technology respectively belong to the mature technology in the display industry, the process difficulty of the display panel of the invention is relatively low, the display module based on the Micro LED can realize full screen frameless display only by being attached to the side surface or the upper surface of a cut color film substrate (the second substrate comprising the color resistance layer of the invention), the size is not required, the development cost requirement on the product is low, and the possibility of mass production is easier to realize.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (11)
1. A display panel, comprising: the display panel comprises a main display area and an expanded display area, wherein the expanded display area is positioned on at least one side of the periphery of the main display area along the direction parallel to the light emergent surface of the display panel;
in the range of the main display area, along a direction perpendicular to a light-emitting surface of the display panel, the display panel comprises a first substrate and a second substrate which are arranged oppositely, and a liquid crystal layer positioned between the first substrate and the second substrate, wherein the first substrate is positioned on one side of the second substrate, which is far away from the light-emitting surface of the display panel, and the second substrate comprises a color resistance layer;
in the extended display area range, the display panel comprises a third substrate, a frame adhesive layer and a fourth substrate along a direction perpendicular to a light-emitting surface of the display panel, the first substrate is reused as the third substrate, the frame adhesive of the frame adhesive layer is arranged around the liquid crystal layer, and the fourth substrate is positioned on one side of the frame adhesive layer, which is far away from the third substrate;
keep away from the fourth base plate one side of frame glue film is provided with drive circuit and the Micro LED base plate of electricity connection, the Micro LED base plate includes the substrate base plate and is located a plurality of Micro LED of substrate base plate one side, drive circuit is used for driving a plurality of the Micro LED is luminous, the substrate base plate is located a plurality of Micro LED keep away from one side of fourth base plate.
2. The display panel according to claim 1, wherein the extended display area is provided around the main display area.
3. The display panel according to claim 1 or 2, wherein a side of the fourth substrate perpendicular to the light exit surface of the display panel and a side of the second substrate perpendicular to the light exit surface of the display panel are bonded to each other through a transparent adhesive.
4. The display panel according to claim 3, wherein a surface of the substrate base plate on a side away from the fourth base plate is on the same level as a surface of the second base plate on a side away from the first base plate.
5. The display panel according to claim 1 or 2, wherein a fifth substrate is further included between the frame glue layer and the fourth substrate within the extended display area, the second substrate is reused as the fifth substrate, and the fourth substrate is located on a side of the fifth substrate away from the third substrate.
6. The display panel of claim 1, wherein the display panel further comprises a backlight module disposed on a side of the first substrate away from the light emitting surface of the display panel, a lower polarizer is disposed between the backlight module and the first substrate, and an upper polarizer is disposed on a side of the second substrate away from the first substrate.
7. The display panel of claim 1, wherein the main display area comprises a plurality of first pixels, and the extended display area comprises a plurality of second pixels, and wherein an area of forward projection of the first pixels to the light-emitting surface of the display panel is the same as an area of forward projection of the second pixels to the light-emitting surface of the display panel.
8. The display panel of claim 1, wherein the display panel further comprises a chip bonding area, and the chip bonding area at least partially overlaps with the extended display area along a direction perpendicular to a light emitting surface of the display panel.
9. A method for manufacturing a display panel, the method being used for manufacturing the display panel according to claim 4;
the manufacturing method at least comprises the following steps:
providing an array substrate, wherein the array substrate comprises a main display area and an expanded display area, and the expanded display area is positioned on at least one side of the periphery of the main display area along a direction parallel to a light emergent surface of the display panel;
the array substrate in the range of the main display area is used as a first substrate, and the array substrate in the range of the extended display area is used as a third substrate;
providing a color film substrate, wherein the color film substrate comprises a main display area and an extended display area, the color film substrate and the array substrate in the extended display area range are attached through frame glue of a frame glue layer, and a liquid crystal layer is filled between the array substrate and the color film substrate in the main display area range;
cutting off the color film substrate in the extended display area range, and using the residual color film substrate as a second substrate;
providing at least one Micro LED module in the range of the extended display area, wherein the Micro LED module comprises a fourth substrate, a driving circuit and a plurality of Micro LEDs are arranged on the surface of the fourth substrate, and the driving circuit is used for driving the Micro LEDs to emit light; a substrate is arranged on one side, away from the fourth substrate, of the Micro LEDs;
the surface of one side, close to the third substrate, of the fourth substrate is attached to the frame adhesive layer, and the side, perpendicular to the light-emitting surface of the display panel, of the fourth substrate is attached to the side, perpendicular to the light-emitting surface of the display panel, of the second substrate through transparent adhesive;
the surface of one side of the substrate base plate, which is far away from the fourth base plate, and the surface of one side of the second base plate, which is far away from the first base plate, are on the same horizontal plane.
10. A manufacturing method of a display panel, wherein the manufacturing method is used for manufacturing the display panel according to claim 5;
the manufacturing method at least comprises the following steps:
providing an array substrate, wherein the array substrate comprises a main display area and an expanded display area, and the expanded display area is positioned on at least one side of the periphery of the main display area along a direction parallel to a light emergent surface of the display panel;
the array substrate in the range of the main display area is used as a first substrate, and the array substrate in the range of the extended display area is used as a third substrate;
providing a color film substrate, wherein the color film substrate comprises a main display area and an extended display area, the color film substrate and the array substrate in the extended display area range are attached through frame glue of a frame glue layer, and a liquid crystal layer is filled between the array substrate and the color film substrate in the main display area range; the color film substrate in the expanded display area range serves as a fifth substrate, and the color film substrate in the main display area range serves as a second substrate;
providing at least one Micro LED module in the range of the extended display area, wherein the Micro LED module comprises a fourth substrate, a driving circuit and a plurality of Micro LEDs are arranged on the surface of the fourth substrate, and the driving circuit is used for driving the Micro LEDs to emit light; a substrate is arranged on one side, away from the fourth substrate, of the Micro LEDs;
and the surface of one side of the fourth substrate, which is close to the third substrate, is attached to the surface of the fifth substrate.
11. A display device characterized by comprising the display panel according to any one of claims 1 to 8.
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Application publication date: 20210820 |