CN114335016A - Display device and manufacturing method thereof - Google Patents
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- CN114335016A CN114335016A CN202111622988.1A CN202111622988A CN114335016A CN 114335016 A CN114335016 A CN 114335016A CN 202111622988 A CN202111622988 A CN 202111622988A CN 114335016 A CN114335016 A CN 114335016A
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Abstract
The invention discloses a display device and a manufacturing method thereof. The display device includes: the fingerprint identification module comprises a display panel, a composite layer arranged on the backlight side of the display panel and a fingerprint identification module arranged on one side of the composite layer, which is far away from the display panel; wherein, the composite layer covers the display panel, the composite layer includes at least: a buffer layer disposed at a backlight side of the display panel; the buffer layer comprises a first area, the orthographic projection of the first area on the display panel covers the orthographic projection of the fingerprint identification module on the display panel, the buffer layer located in the first area is made of a first bonding material with high elastic modulus, and the elastic modulus of the first bonding material is 6-8 mpa. The scheme disclosed by the invention can improve the color difference problem of the display device and improve the display effect.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display device and a manufacturing method thereof.
Background
With the continuous development of display technologies, the underscreen fingerprints are gradually applied to the display screen as a new technical breakthrough of the touch display screen. The fingerprint under the screen is that a fingerprint sensor is integrated under the display screen, and the fingerprint sensor responds to the touch operation of a user on a preset position in the display screen and collects fingerprint information of the user. The fingerprint information can be used for fingerprint identification in the scenes of payment or unlocking and the like.
The existing display screen with the function of fingerprint under the screen can generally arrange the fingerprint sensor in the hollow area. When the display screen is lightened, optical chromatic aberration can be formed due to the fact that the reflectivity of the hollow area is inconsistent with the reflectivity of the non-hollow area, the phenomenon that shadow is visible in the hollow area can be caused, and the display effect is affected.
Disclosure of Invention
The invention provides a display device and a manufacturing method thereof, which can improve the color difference problem of the display device and improve the display effect.
In a first aspect, an embodiment of the present invention provides a display device, including:
the fingerprint identification module comprises a display panel, a composite layer arranged on the backlight side of the display panel and a fingerprint identification module arranged on one side of the composite layer, which is far away from the display panel; wherein the content of the first and second substances,
the composite layer covers the display panel, and the composite layer at least comprises: a buffer layer disposed at a backlight side of the display panel;
the buffer layer comprises a first area, the orthographic projection of the first area on the display panel covers the orthographic projection of the fingerprint identification module on the display panel, the buffer layer located in the first area is made of a first bonding material with high elastic modulus, and the elastic modulus of the first bonding material is 6-8 mpa.
As above, the buffer layer is optionally made entirely of the first adhesive material.
In the above display device, optionally, the buffer layer further includes a second region, an orthographic projection of the second region on the display panel does not overlap with an orthographic projection of the first region on the display panel, the buffer layer located in the second region is made of foam, and a color of the foam is consistent with a color of the first adhesive material.
According to the display device, optionally, the shortest distance from the edge of the orthographic projection of the fingerprint identification module on the display panel to the edge of the orthographic projection of the first area on the display panel is 1mm-2 mm.
The display device as above, optionally, the first adhesive material comprises a photo-curable adhesive material and/or a heat-curable adhesive material;
preferably, the first adhesive material is at least one of an optically clear adhesive OCA, an optically clear resin OCR, a pressure sensitive adhesive PSA.
The display device as above, optionally, the composite layer and the fingerprint identification module are bonded by a second adhesive material;
preferably, the second adhesive material is at least one of OCA, OCR, PSA.
According to the display device, optionally, the edge of the joint of the fingerprint identification module and the second adhesive material is provided with the sealant layer.
In a second aspect, an embodiment of the present invention further provides a method for manufacturing a display device, including:
respectively preparing a metal layer, a transition layer and a buffer layer to form a composite layer;
attaching the composite layer to the backlight side of the display panel;
arranging a fingerprint identification module on one side of the metal layer, which is far away from the display panel;
the buffer layer comprises a first area, orthographic projection of the first area on the display panel covers orthographic projection of the fingerprint identification module on the display panel, the buffer layer located in the first area is made of a first bonding material with high elastic modulus, and the elastic modulus of the first bonding material is 6-8 mpa.
In the above method for manufacturing a display device, the buffer layer may be entirely made of the first adhesive material.
Optionally, in the manufacturing method of the display device as above, the buffer layer further includes a second region, an orthographic projection of the second region on the display panel does not overlap with an orthographic projection of the first region on the display panel, and the preparing the buffer layer includes:
attaching foam to one side of the transition layer, which is far away from the metal layer, and cutting off the foam corresponding to the size and the position of the first area;
filling a first bonding material at the position where the foam is removed to form a buffer layer;
wherein the color of the foam is consistent with the color of the first bonding material.
The invention provides a display device and a manufacturing method thereof, wherein a composite layer is redesigned and at least comprises a buffer layer, wherein the buffer layer comprises a first area, the orthographic projection of the first area on a display panel covers the orthographic projection of a fingerprint identification module on the display panel, the buffer layer positioned in the first area is made of a first bonding material with high elastic modulus, the elastic modulus of the first bonding material is 6-8 mpa, and the influence of the traditional foam as a buffer layer material on the transmission of ultrasonic signals is avoided; meanwhile, the composite layer completely covers the display panel, so that the color difference problem of the display device can be improved, and the display effect is improved.
Drawings
FIG. 1 is a schematic cross-sectional view of a conventional display device with an underscreen fingerprint function;
fig. 2 is a schematic top view of a display device according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of a display device according to an embodiment of the invention;
fig. 4 is a schematic cross-sectional view of another display device according to an embodiment of the invention;
fig. 5 is a schematic flowchart illustrating a manufacturing method of a display device according to an embodiment of the present invention;
FIG. 6 is a schematic flow chart illustrating a method for fabricating a composite layer according to an embodiment of the present invention;
FIG. 7 is a schematic diagram illustrating the fabrication of a composite layer according to an embodiment of the present invention;
FIG. 8 is a schematic flow chart of another method for fabricating a composite layer according to an embodiment of the present invention;
fig. 9 is a schematic diagram of another composite layer according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Also, the drawings and description of the embodiments are to be regarded as illustrative in nature, and not as restrictive. Like reference numerals refer to like elements throughout the specification. In addition, the thickness of some layers, films, panels, regions, etc. may be exaggerated in the drawings for understanding and ease of description. It will also be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. In addition, "on … …" means that an element is positioned on or under another element, but does not essentially mean that it is positioned on the upper side of the other element according to the direction of gravity. For ease of understanding, the figures of the present invention depict one element on top of another.
Additionally, unless explicitly described to the contrary, the word "comprise", and variations such as "comprises" or "comprising", will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.
It should also be noted that references to "and/or" in embodiments of the invention are intended to include any and all combinations of one or more of the associated listed items. Various components are described in embodiments of the present invention with "first", "second", "third", and the like, but these components should not be limited by these terms. These terms are only used to distinguish one component from another. Also, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
While certain embodiments may be practiced differently, the specific process sequence may be performed differently than described. For example, two processes described consecutively may be performed at substantially the same time or in an order reverse to that described.
At present, the underscreen fingerprints are gradually applied to the display screen as a new technical breakthrough of the touch display screen. Fig. 1 is a schematic cross-sectional view illustrating a conventional display device having an underscreen fingerprint function, and as shown in fig. 1, the display device includes: display panel 1, bubble cotton 2, substrate 3, copper foil 4, fingerprint identification module 5 and tie coat 6. Because there is the air in the bubble cotton 2, the air can produce the influence to ultrasonic signal's transmission, consequently, can carry out trompil processing to bubble cotton 2, substrate 3 and copper foil 4, forms the fretwork district. Fingerprint identification module 5 sets up in the fretwork district, and fingerprint identification module 5 is attached on display panel 1 through tie coat 6. The area in fretwork district is greater than the area of the upper surface of fingerprint identification module 5, therefore remaining fretwork district can form the round in the periphery of fingerprint identification module 5 and leave whitely. When lighting up the display screen, the position of fingerprint identification module 5, leave white position and the reflectivity in non-fretwork district are all inconsistent, can form optical aberration, lead to the visible phenomenon of shadow can appear in the fretwork district, especially under the bright environment of light, this defect is more obvious, influences the display effect.
In order to solve the above problems, embodiments of the present invention provide a display device and a manufacturing method thereof, which can improve the color difference problem of the display device and improve the display effect. Next, the structure, manufacturing method, and technical effects of the display device will be described in detail.
In addition, in the following embodiments, the display device is illustrated as being rectangular, and the fingerprint identification area is illustrated as being circular, in practical applications, the display device may also be in a regular or irregular shape such as a circle or a polygon, and the fingerprint identification area may also be in a regular or irregular shape such as a rectangle or a droplet, which is not limited in particular by the present invention.
Fig. 2 is a schematic top view illustrating a display device according to an embodiment of the present invention, and as shown in fig. 2, the display device includes a display area AA and a non-display area NAA adjacent to the display area AA, where the non-display area NAA surrounds the display area AA in fig. 2. The display area AA is an area of the display device for displaying a picture; the non-display area NAA generally includes peripheral driving elements, peripheral traces, and a fan-out area. Optionally, in order to implement a narrow bezel, if the display device is a flexible display device, the non-display area NAA may further include a bending area and a non-bending area, the bending area is located between the non-bending area and the display area AA, and a bezel area (located in the non-display area) of the display device may be folded back to the back of the display device.
The display device has an off-screen fingerprint function, and therefore, the display area AA includes a fingerprint identification area 10 and a non-fingerprint identification area 11; wherein, be provided with the fingerprint identification module in fingerprint identification district 10, the fingerprint identification module includes at least one fingerprint identification sensor for display device both can show the picture, can realize the fingerprint identification function again, is favorable to display device to realize comprehensive screen design, reduces the frame.
In a first exemplary implementation manner, fig. 3 illustrates a schematic cross-sectional structure diagram of a display device provided in an embodiment of the present invention, and as shown in fig. 3, the display device includes: a display panel 100, a composite layer 200 and a fingerprint identification module 300.
Specifically, the composite layer 200 includes: a buffer layer 201 disposed on the backlight side of the display panel 100; a transition layer 202 disposed on a side of the buffer layer 201 away from the display panel 100; and the metal layer 203 is arranged on the side of the transition layer 202 far away from the buffer layer 201. The fingerprint recognition module 300 is disposed on a side of the composite layer 200 away from the display panel 100.
Referring to fig. 3, the composite layer 200 completely covers the display panel 100, the buffer layer 201 includes a first region 2011 and a second region 2012, an orthogonal projection of the first region 2011 on the display panel 100 covers an orthogonal projection of the fingerprint identification module 300 on the display panel 100, and an orthogonal projection of the second region 2012 on the display panel 100 does not overlap with an orthogonal projection of the first region 2011 on the display panel 100, that is, the second region 2012 is a region of the buffer layer 201 except for the first region 2011. The buffer layer 201 located in the first region 2011 is made of a first adhesive material having a high elastic modulus. Because the buffer layer 201 in the first region 2011 is made of the first bonding material with high elastic modulus, the traditional foam is no longer used as the material of the buffer layer 201, and the transmission influence of the buffer layer 201 on ultrasonic signals is avoided; meanwhile, the composite layer 200 completely covers the display panel 100, so that the color difference problem of the display device can be improved, and the display effect can be improved.
In one embodiment, the first adhesive material has a modulus of elasticity of 6mpa to 8 mpa. The first adhesive material having a high elastic modulus may play a role of buffering to protect the display device from being damaged.
The first bonding material includes, but is not limited to, a photo-curable bonding material and/or a heat-curable bonding material; optionally, the first Adhesive material is at least one of Optically Clear Adhesive (OCA), Optically Clear Resin (OCR), and Pressure Sensitive Adhesive (PSA).
In an embodiment, the orthographic projection of the first area 2011 on the display panel 100 covers the orthographic projection of the fingerprint identification module 300 on the display panel 100, which refers to: the orthographic projection of the first region 2011 on the display panel 100 at least coincides with the orthographic projection of the fingerprint identification module 300 on the display panel 100. When first region 2011 orthographic projection on display panel 100 coincides with the orthographic projection of fingerprint identification module 300 on display panel 100, the width of first region 2011 equals with the width of fingerprint identification module 300, so, avoided being located buffer layer 201 of first region 2011 to ultrasonic signal's transmission influence, guarantee fingerprint identification module 300's performance.
Alternatively, in order to reduce the manufacturing difficulty, as shown in fig. 3, the orthographic projection of the fingerprint identification module 300 on the display panel 100 is in the orthographic projection of the first area 2011 on the display panel 100. That is, the width of the first area 2011 is slightly larger than the width of the fingerprint identification module 300. Optionally, referring to fig. 3, the shortest distance L from the edge of the orthographic projection of the fingerprint identification module 300 on the display panel 100 to the edge of the orthographic projection of the first area 2011 on the display panel 100 is 1mm to 2 mm.
With continued reference to fig. 3, the cushioning layer 201 in the second region 2012 is made of foam, and the color of the foam is consistent with the color of the first adhesive material. Typically, the foam and the first adhesive material are both black in color. Because the fingerprint identification module 300 is not arranged below the buffer layer 201 in the second region 2012, the buffer layer 201 in the region is made of foam and does not affect the transmission of the ultrasonic signal, and meanwhile, the buffer layer 201 in the region is made of foam and can control the production cost of the display device; meanwhile, the color of the foam is consistent with that of the first bonding material, and the reflectivity of the display device can be guaranteed to be consistent, so that the color difference problem of the display device is further improved, and the display effect is improved.
In a second exemplary implementation manner, fig. 4 shows a schematic cross-sectional structure diagram of another display device provided in an embodiment of the present invention. Different from the display device shown in fig. 3, the buffer layer 201 of the display device shown in fig. 4 is made of the first adhesive material, that is, the entire buffer layer 201 is made of the first adhesive material with the elastic modulus of 6mpa-8mpa, and the buffer layer 201 is an integrally formed structure, so that one die cutting process can be reduced, and the manufacturing difficulty of the buffer layer 201 can be reduced.
In one embodiment, the transition layer 202 is usually made of Polyimide (PI), which is the best temperature resistant material among the existing polymer materials, and has excellent chemical stability and mechanical properties. The metal layer 203 is typically a copper foil.
The metal layer 203 in the composite layer 200 is adhered to the fingerprint identification module 300 through a second adhesive material 301; the second adhesive material 301 has good adhesion to ensure the adhesion between the metal layer 203 and the fingerprint recognition module 300.
Optionally, the second adhesive material is at least one of OCA, OCR, PSA.
It is understood that when the first adhesive material and the second adhesive material are both OCR, the OCR of the first adhesive material and the OCR of the second adhesive material may be different. This is because the first adhesive material mainly functions as a buffer to protect the display device from being damaged; and the second adhesive material mainly serves to adhere the metal layer 203 and the fingerprint recognition module 300. I.e., the first adhesive material is focused on selecting a material with a high modulus of elasticity and the second adhesive material is focused on selecting a material with high adhesion.
Further, as shown in fig. 3 and 4, an adhesive layer 302 is disposed on an edge of the fingerprint identification module 300. The edge of the bonding of bond line 302 at second bonding material 301 and fingerprint identification module 300 junction prevents that steam from getting into fingerprint identification module 300. In addition, the glue layer 302 is usually made of black glue which can be naturally cured at normal temperature, and the glue can be cured at normal temperature, so that other components are not affected by stress in the glue curing process, and the black glue layer 302 can absorb overflowing light.
In an embodiment, the display device may further include: a polarizer disposed on a side of the display panel 100 away from the composite layer 200; an adhesive layer disposed on a side of the polarizer away from the display panel 100; and the cover plate is arranged on one side of the bonding layer away from the polaroid.
The display panel 100 includes a driving circuit layer (including a thin film transistor), a light emitting element disposed on the driving circuit layer, and an encapsulation layer disposed on the light emitting element.
Taking a thin film transistor as an example of a thin film transistor with a top gate structure, specifically, the thin film transistor includes: the semiconductor device comprises a substrate, a buffer film layer, an active layer, a grid electrode insulating layer, a grid electrode, an interlayer insulating layer, a source electrode and a drain electrode, wherein the buffer film layer is positioned on the substrate, the active layer is positioned on the buffer film layer, the grid electrode insulating layer is positioned on the active layer, the grid electrode is positioned on the grid electrode insulating layer, the interlayer insulating layer is positioned on the grid electrode, and the source electrode and the drain electrode are positioned on the interlayer insulating layer; a passivation layer on the source and drain electrodes; the source and the drain may be located in the same layer and obtained by a one-step patterning process, and therefore, the source and the drain may also be referred to as a source and drain metal layer.
When the light emitting element is an organic light emitting diode, the light emitting element sequentially comprises an anode, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode in the direction away from the substrate. An anode of the light emitting element is electrically connected to a drain of the thin film transistor. Specifically, the anode is electrically connected to the drain electrode through a via hole penetrating the passivation layer.
The encapsulation layer may include at least one inorganic encapsulation layer and at least one organic encapsulation layer, wherein the inorganic encapsulation layer and the organic encapsulation layer are sequentially overlapped.
The display device may also include a front camera and a sensor. The front camera and the sensor are correspondingly disposed below the display area of the display panel 100. Optionally, besides the front camera and the sensor, other devices, such as a gyroscope or an earphone, may be disposed below the display area.
The display panel 100 may be any one of display panels such as an Organic Light-Emitting Diode (OLED) display panel, an In-Plane Switching (IPS) display panel, a Twisted Nematic (TN) display panel, a Vertical Alignment (VA) display panel, electronic paper, a Quantum Dot Light Emitting (QLED) display panel, or a micro LED (micro Light Emitting Diode, μ LED) display panel, which is not particularly limited In this respect. The light emitting mode of the display panel 100 may be top emission, bottom emission, or both-side emission.
The display device provided by the embodiment of the invention can be applied to intelligent wearable equipment (such as an intelligent bracelet and an intelligent watch) and also can be applied to equipment such as an intelligent mobile phone, a tablet personal computer and a display.
An embodiment of the present invention provides a display device, including: the fingerprint identification module comprises a display panel, a composite layer arranged on the backlight side of the display panel and a fingerprint identification module arranged on one side of the composite layer, which is far away from the display panel; wherein, the composite layer covers the display panel, the composite layer includes at least: a buffer layer disposed at a backlight side of the display panel; the buffer layer comprises a first area, the orthographic projection of the first area on the display panel covers the orthographic projection of the fingerprint identification module on the display panel, the buffer layer located in the first area is made of a first bonding material with high elastic modulus, and the elastic modulus of the first bonding material is 6-8 mpa. Through redesigning the composite layer, the composite layer at least comprises a buffer layer, wherein the buffer layer comprises a first area, the orthographic projection of the first area on the display panel covers the orthographic projection of the fingerprint identification module on the display panel, the buffer layer positioned in the first area is made of a first bonding material with high elastic modulus, the elastic modulus of the first bonding material is 6-8 mpa, and the influence of the traditional foam cotton as a buffer layer material on the transmission of ultrasonic signals is avoided; meanwhile, the composite layer completely covers the display panel, so that the color difference problem of the display device can be improved, and the display effect is improved.
Fig. 5 is a schematic flowchart illustrating a manufacturing method of a display device according to an embodiment of the present invention, the manufacturing method is used for manufacturing the display device shown in fig. 3 or fig. 4, and as shown in fig. 5, the manufacturing method of the display device may include steps S101 to S103.
S101, preparing a metal layer, a transition layer and a buffer layer respectively to form a composite layer.
The buffer layer comprises a first area, orthographic projection of the first area on the display panel covers orthographic projection of the fingerprint identification module on the display panel, the buffer layer located in the first area is made of a first bonding material with high elastic modulus, and the elastic modulus of the first bonding material is 6-8 mpa.
In a possible implementation manner, specifically, fig. 6 shows a schematic flow chart of a manufacturing method of a composite layer according to an embodiment of the present invention, and fig. 7 shows a schematic manufacturing diagram of a composite layer according to an embodiment of the present invention. As shown in fig. 6, the method of forming the composite layer may specifically include S101a-S101 c:
s101a, preparing a metal layer and a transition layer respectively, and bonding the metal layer and the transition layer together.
As shown in fig. 7, the metal layer 203 is typically a copper foil. The transition layer 202 is usually made of PI, which is the best material with the highest temperature resistance among the existing polymer materials, and has excellent chemical stability and mechanical properties.
S101b, attaching foam on the side, far away from the metal layer, of the transition layer, and cutting off the foam corresponding to the size and the position of the first area.
As shown in fig. 7, after the foam is cut, only the foam located in the second region 2012 remains. Because the fingerprint identification module can not set up in the below of second region 2012, consequently adopt traditional cotton material of bubble can not influence the performance of fingerprint identification module.
And S101c, filling the first adhesive material at the position where the foam is removed to form a buffer layer.
The first adhesive material is located in the first area 2011, and the orthographic projection of the first area 2011 on the display panel 100 covers the orthographic projection of the fingerprint identification module on the display panel 100. Since the buffer layer 201 in the first region 2011 is made of the first adhesive material with high elastic modulus, the conventional foam is no longer used as the material of the buffer layer 201, and therefore, the transmission influence of the buffer layer 201 on the ultrasonic signal is avoided.
In another possible implementation manner, specifically, fig. 8 shows a schematic flow chart of a manufacturing method of another composite layer provided in the embodiment of the present invention, and fig. 9 shows a schematic manufacturing diagram of another composite layer provided in the embodiment of the present invention. As shown in fig. 8, the method of forming the composite layer may specifically include S101y and S101 z:
s101y, preparing a metal layer, a transition layer and a buffer layer respectively.
As shown in fig. 9, the metal layer 203 is typically a copper foil. The transition layer 202 is usually made of PI, which is the best material with the highest temperature resistance among the existing polymer materials, and has excellent chemical stability and mechanical properties.
And S101z, bonding the metal layer, the transition layer and the buffer layer together to form a composite layer.
And S102, attaching the composite layer to the backlight side of the display panel.
After the composite layer is formed through the two possible embodiments, the composite layer is attached to the backlight side of the display panel, and the composite layer covers the display panel.
S103, a fingerprint identification module is arranged on one side of the metal layer, which is far away from the display panel.
The side of keeping away from display panel at the metal level is passed through second adhesive material and is glued fingerprint identification module and metal level. Optionally, can also set up the adhesive tape layer at the edge of fingerprint identification module and second bonding material junction, prevent that steam from getting into the fingerprint identification module.
The glue layer is usually made of black glue which can be naturally cured at normal temperature, the glue can be cured at normal temperature, other parts cannot be affected due to stress in the glue curing process, and the black glue layer can absorb overflowing light.
The embodiment of the invention provides a manufacturing method of a display device, which comprises the following steps: respectively preparing a metal layer, a transition layer and a buffer layer to form a composite layer; attaching the composite layer to the backlight side of the display panel; arranging a fingerprint identification module on one side of the metal layer, which is far away from the display panel; the buffer layer comprises a first area, orthographic projection of the first area on the display panel covers orthographic projection of the fingerprint identification module on the display panel, the buffer layer located in the first area is made of a first bonding material with high elastic modulus, and the elastic modulus of the first bonding material is 6-8 mpa. Through redesigning the composite layer, the composite layer at least comprises a buffer layer, wherein the buffer layer comprises a first area, the orthographic projection of the first area on the display panel covers the orthographic projection of the fingerprint identification module on the display panel, the buffer layer positioned in the first area is made of a first bonding material with high elastic modulus, the elastic modulus of the first bonding material is 6-8 mpa, and the influence of the traditional foam cotton as a buffer layer material on the transmission of ultrasonic signals is avoided; meanwhile, the composite layer completely covers the display panel, so that the color difference problem of the display device can be improved, and the display effect is improved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A display device, comprising:
the fingerprint identification module comprises a display panel, a composite layer arranged on the backlight side of the display panel and a fingerprint identification module arranged on one side, far away from the display panel, of the composite layer; wherein the content of the first and second substances,
the composite layer covers the display panel, and the composite layer at least includes: a buffer layer disposed on a backlight side of the display panel;
the buffer layer comprises a first area, the orthographic projection of the first area on the display panel covers the orthographic projection of the fingerprint identification module on the display panel, the buffer layer located in the first area is made of a first adhesive material with high elastic modulus, and the elastic modulus of the first adhesive material is 6-8 mpa.
2. The display device according to claim 1, wherein the buffer layer is entirely made of the first adhesive material.
3. The display device according to claim 1, wherein the buffer layer further comprises a second region, an orthographic projection of the second region on the display panel is not overlapped with an orthographic projection of the first region on the display panel, the buffer layer located in the second region is made of foam, and the color of the foam is consistent with the color of the first adhesive material.
4. The display device according to claim 3, wherein the shortest distance from the edge of the orthographic projection of the fingerprint identification module on the display panel to the edge of the orthographic projection of the first area on the display panel is 1mm-2 mm.
5. The display device according to any one of claims 1 to 4, wherein the first adhesive material comprises a photo-curable adhesive material and/or a heat-curable adhesive material;
preferably, the first adhesive material is at least one of optically clear adhesive OCA, optically clear resin OCR, pressure sensitive adhesive PSA.
6. The display device of claim 1, wherein the composite layer and the fingerprint identification module are bonded by a second adhesive material;
preferably, the second adhesive material is at least one of OCA, OCR, PSA.
7. The display device according to claim 6, wherein an adhesive layer is disposed on an edge of a joint of the fingerprint identification module and the second adhesive material.
8. A method for manufacturing a display device, comprising:
respectively preparing a metal layer, a transition layer and a buffer layer to form a composite layer;
attaching the composite layer to the backlight side of the display panel;
arranging a fingerprint identification module on one side of the metal layer, which is far away from the display panel;
the buffer layer comprises a first area, the orthographic projection of the first area on the display panel covers the orthographic projection of the fingerprint identification module on the display panel, the buffer layer located in the first area is made of a first adhesive material with high elastic modulus, and the elastic modulus of the first adhesive material is 6-8 mpa.
9. The method for manufacturing a display device according to claim 8, wherein the buffer layer is entirely made of the first adhesive material.
10. The method of claim 8, wherein the buffer layer further comprises a second region, and an orthographic projection of the second region on the display panel is not overlapped with an orthographic projection of the first region on the display panel, and the preparing the buffer layer comprises:
attaching foam to one side of the transition layer, which is far away from the metal layer, and cutting off the foam corresponding to the size and the position of the first area;
filling the first bonding material at the position where the foam is removed to form the buffer layer;
wherein the color of the foam is consistent with the color of the first bonding material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111622988.1A CN114335016A (en) | 2021-12-28 | 2021-12-28 | Display device and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111622988.1A CN114335016A (en) | 2021-12-28 | 2021-12-28 | Display device and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN114335016A true CN114335016A (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111622988.1A Pending CN114335016A (en) | 2021-12-28 | 2021-12-28 | Display device and manufacturing method thereof |
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| CN (1) | CN114335016A (en) |
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2021
- 2021-12-28 CN CN202111622988.1A patent/CN114335016A/en active Pending
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