CN109411524B - Display module and display device - Google Patents

Display module and display device Download PDF

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Publication number
CN109411524B
CN109411524B CN201811470471.3A CN201811470471A CN109411524B CN 109411524 B CN109411524 B CN 109411524B CN 201811470471 A CN201811470471 A CN 201811470471A CN 109411524 B CN109411524 B CN 109411524B
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layer
light
touch
display module
display
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CN109411524A (en
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金祥
许杰
秦学思
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/40—OLEDs integrated with touch screens
    • 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
    • G09F9/301—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 flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The invention provides a display module and a display device, wherein the display module comprises a display panel; a touch layer on the display panel; the cover plate layer is positioned on the touch layer; a light absorbing layer positioned between the touch layer and the cover plate layer; wherein, the light absorption layer comprises at least two light absorption units distributed in an array. According to the invention, the light absorption layer for absorbing the external light source is arranged on the touch layer, and the light absorption units in the light absorption layer are distributed on the touch layer in an array manner, so that the influence of the external light source on the OLED display is greatly reduced, the loss of light intensity energy generated by the light emitting layer in the OLED display is avoided, and the contrast and the service life of the OLED display are improved.

Description

Display module and display device
Technical Field
The invention relates to the field of display, in particular to a display module and a display device.
Background
With the progress of display technology, flexible OLED displays are becoming mainstream. The conventional flexible OLED display includes a Polarizer (POL), which is mainly used to prevent light externally incident into the OLED display from exiting the OLED display, so as to improve the contrast of the OLED display.
However, the conventional polarizer has several problems:
one, POL itself is black in color, so POL will be an obstacle in manufacturing transparent OLED. Moreover, since POL is thicker, the difficulty of manufacturing a thinner and lighter OLED display is increased;
secondly, light reflected on the surface of the POL cannot be eliminated, and the POL has limited capability of improving the contrast of the OLED display;
and thirdly, the POL can weaken the light intensity (50%) of light emitted by the OLED while improving the contrast of the OLED display, and the service life of the OLED display is reduced to a certain extent.
Therefore, the present invention provides a novel structure based on this technical problem.
Disclosure of Invention
The invention provides a display panel and a display device, which aim to solve the technical problem that the existing OLED display is low in contrast.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
the invention provides a display module, which comprises:
a display panel;
a touch layer on the display panel;
the cover plate layer is positioned on the touch layer; and
a light absorbing layer positioned between the touch layer and the cover plate layer;
wherein, the light absorption layer comprises at least two light absorption units distributed in an array.
In the display module of the invention, the material of the light absorbing layer is one or more of graphite or metal oxide.
In the display module, the distances between two adjacent light absorption units in the first direction or the second direction are equal.
In the display module of the invention, the orthographic projection surface of the light absorption unit on the touch layer is one or a combination of more than one of a square, a rectangle or a circle.
In the display module of the invention, the display module further comprises a color film layer, and the color film layer is positioned between the touch layer and the light absorption layer.
The invention also provides a display device, which comprises a display module, wherein the display module comprises:
a display panel;
a touch layer on the display panel;
the cover plate layer is positioned on the touch layer; and
a light absorbing layer positioned between the touch layer and the cover plate layer;
wherein, the light absorption layer comprises at least two light absorption units distributed in an array.
In the display module of the invention, the material of the light absorbing layer is one or more of graphite or metal oxide.
In the display module, the distances between two adjacent light absorption units in the first direction or the second direction are equal.
In the display module of the invention, the orthographic projection surface of the light absorption unit on the touch layer is one or a combination of more than one of a square, a rectangle or a circle.
In the display module of the invention, the display module further comprises a color film layer, and the color film layer is positioned between the touch layer and the light absorption layer.
Has the advantages that: according to the invention, the light absorption layer for absorbing the external light source is arranged on the touch layer, and the light absorption units in the light absorption layer are distributed on the touch layer in an array manner, so that the influence of the external light source on the OLED display is greatly reduced, the loss of light intensity energy generated by the light emitting layer in the OLED display is avoided, and the contrast and the service life of the OLED display are improved.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for a person skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a diagram of a film structure of a display module according to the present application;
FIG. 2 is a top view of a light absorbing layer in a display module of the present application;
FIG. 3 is a first side view of a display module according to the present application;
fig. 4 is a second side view of the display module of the present application.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings that illustrate specific embodiments in which the invention may be practiced. The directional terms mentioned in the present invention, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], are only referring to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
Referring to fig. 1, fig. 1 is a film structure diagram of a display module according to the present application.
The display module 100 includes:
the display panel 10, the display panel 10 may be an OLED display or other kinds of flexible display, and is not limited in particular.
The display panel 10 includes a substrate 20 and a thin-film transistor layer 30 on the substrate 20.
In one embodiment, the substrate 20 may be a rigid substrate. The material of the rigid substrate may be one of a glass substrate, a quartz substrate, a resin substrate, and the like.
In one embodiment, the substrate 20 may be a flexible substrate. The flexible material of the flexible substrate is not limited in this application, such as a polyimide film.
The thin film transistor layer 30 includes an etching barrier layer type, a back channel etching type, or a top gate thin film transistor type, and the like, and is not particularly limited. The thin-film-transistor layer 30, for example, of a top-gate thin-film-transistor type, may include: the semiconductor device comprises a barrier layer, a buffer layer, an active layer, a first gate insulating layer, a gate electrode, a second gate insulating layer, a second metal layer, an interlayer insulating layer and a source drain electrode.
A light emitting device layer 40 on the thin-film-transistor layer 30.
The light emitting device layer 40 includes an anode layer on the thin film transistor layer 30, a light emitting layer on the anode layer, and the cathode layer on the light emitting layer.
In one embodiment, the light emitting device is a top emission type OLED device, and the light emitting device is a white OLED device emitting white light. Thus, the anode layer is a non-transparent reflective layer and the cathode layer is a transparent metal layer.
The encapsulation layer 50 on the cathode layer. The encapsulation layer 50 may be deposited by CVD, Sputter, ALD, vacuum evaporation, IJP, etc. The encapsulation layer 50 mainly plays a role of blocking water and oxygen, and prevents external water vapor from corroding the organic light emitting layer, and the encapsulation layer 50 comprises at least one organic layer and at least one inorganic layer which are alternately stacked.
A touch layer 60 on the encapsulation layer 50.
In one embodiment, the touch layer 60 may be formed directly on the encapsulation layer using a deposition process.
In one embodiment, the touch layer 60 may be embedded within the encapsulation layer.
In one embodiment, the touch layer 60 may be prepared in advance and directly bonded to the encapsulation layer through an optical adhesive.
A color film layer (not shown) on the touch layer 60.
In one embodiment, the color film layer may be disposed between the encapsulation layer 50 and the touch pad, the color film layer is not limited to be disposed on the touch pad 60, and the positions of the two layers may be interchanged.
A light absorbing layer 70 on the touch layer 60.
In one embodiment, the material of the light absorbing layer 70 may be one or a combination of more than one of graphite or metal oxide.
Referring to fig. 2, fig. 2 is a top view of a light absorbing layer in a display module according to the present application.
The light absorbing layer 70 includes at least two light absorbing units 701 distributed in an array on the light absorbing layer 70.
The orthographic projection area of the light absorption unit 701 on the touch layer 60 is one or a combination of more than one of a square, a rectangle or a circle.
In one embodiment, the forward projection surfaces of the light absorbing units 701 on the touch layer 60 are the same in shape, and are all square with a side length of 2 micrometers.
The distances between two adjacent light absorption units 701 in the first direction or the second direction are equal.
In one embodiment, the first direction is parallel to a long side of the display module 100, and the second direction is parallel to a short side of the display module 100.
Referring to fig. 2, in the first direction, a distance between two adjacent light absorbing units 701 is 5 μm. In the second direction, the distance between two adjacent light absorbing units 701 is 5 micrometers.
Referring to fig. 3, fig. 3 is a first side view of a display module according to the present application.
The light absorbing unit 701 is a rectangular parallelepiped. The thickness of the light emitting layer was 20 microns.
When an external light source is incident into the display module 100, the incident light is not absorbed by the light absorbing layer 70 only when the incident angle is not greater than θ 1.
In this embodiment, θ 1 is arctan (2.5/20).
Referring to fig. 4, fig. 4 is a second side view of the display module of the present application.
The light absorbing unit 701 is a triangular prism. The thickness of the light emitting layer was 10 microns.
When an external light source is incident into the display module 100, the incident light is not absorbed by the light absorbing layer 70 only when the incident angle is not greater than θ 2.
In this embodiment, θ 2 is arctan (2.5/10).
In one embodiment, the shape of the light absorbing unit 701 and the thickness of the light emitting layer are not limited to the above two cases.
A cover plate layer 80 positioned over the light absorbing layer 70.
In one embodiment, the cover plate layer 80 may be prepared in advance and bonded directly to the underlying film structure by an optical adhesive.
In one embodiment, the cover plate layer 80 may be formed directly on the light absorbing layer 70 by a deposition process.
According to the invention, the light absorption layer for absorbing the external light source is arranged on the touch layer, and the light absorption units in the light absorption layer are distributed on the touch layer in an array manner, so that the influence of the external light source on the OLED display is greatly reduced, the loss of light intensity energy generated by the light emitting layer in the OLED display is avoided, and the contrast and the service life of the OLED display are improved.
The application also provides a display device, the display device comprises a display module.
Referring to fig. 1, the display module 100 includes:
the display panel 10, the display panel 10 may be an OLED display or other kinds of flexible display, and is not limited in particular.
The display panel 10 includes a substrate 20 and a thin-film transistor layer 30 on the substrate 20.
In one embodiment, the substrate 20 may be a rigid substrate. The material of the rigid substrate may be one of a glass substrate, a quartz substrate, a resin substrate, and the like.
In one embodiment, the substrate 20 may be a flexible substrate. The flexible material of the flexible substrate is not limited in this application, such as a polyimide film.
The thin film transistor layer 30 includes an etching barrier layer type, a back channel etching type, or a top gate thin film transistor type, and the like, and is not particularly limited. The thin-film-transistor layer 30, for example, of a top-gate thin-film-transistor type, may include: the semiconductor device comprises a barrier layer, a buffer layer, an active layer, a first gate insulating layer, a gate electrode, a second gate insulating layer, a second metal layer, an interlayer insulating layer and a source drain electrode.
A light emitting device layer 40 on the thin-film-transistor layer 30.
The light emitting device layer 40 includes an anode layer on the thin film transistor layer 30, a light emitting layer on the anode layer, and the cathode layer on the light emitting layer.
In one embodiment, the light emitting device is a top emission type OLED device, and the light emitting device is a white OLED device emitting white light. Thus, the anode layer is a non-transparent reflective layer and the cathode layer is a transparent metal layer.
The encapsulation layer 50 on the cathode layer. The encapsulation layer 50 may be deposited by CVD, Sputter, ALD, vacuum evaporation, IJP, etc. The encapsulation layer 50 mainly plays a role of blocking water and oxygen, and prevents external water vapor from corroding the organic light emitting layer, and the encapsulation layer 50 comprises at least one organic layer and at least one inorganic layer which are alternately stacked.
A touch layer 60 on the encapsulation layer 50.
In one embodiment, the touch layer 60 may be formed directly on the encapsulation layer using a deposition process.
In one embodiment, the touch layer 60 may be embedded within the encapsulation layer.
In one embodiment, the touch layer 60 may be prepared in advance and directly bonded to the encapsulation layer through an optical adhesive.
A color film layer (not shown) on the touch layer 60.
In one embodiment, the color film layer may be disposed between the encapsulation layer 50 and the touch pad, the color film layer is not limited to be disposed on the touch pad 60, and the positions of the two layers may be interchanged.
A light absorbing layer 70 on the touch layer 60.
In one embodiment, the material of the light absorbing layer 70 may be one or a combination of more than one of graphite or metal oxide.
Referring to fig. 2, the light absorbing layer 70 includes at least two light absorbing units 701, and the light absorbing units are distributed in an array on the light absorbing layer 70.
The orthographic projection area of the light absorption unit 701 on the touch layer 60 is one or a combination of more than one of a square, a rectangle or a circle.
In one embodiment, the forward projection surfaces of the light absorbing units 701 on the touch layer 60 are the same in shape, and are all square with a side length of 2 micrometers.
The distances between two adjacent light absorption units 701 in the first direction or the second direction are equal.
In one embodiment, the first direction is parallel to a long side of the display module 100, and the second direction is parallel to a short side of the display module 100.
Referring to fig. 2, in the first direction, a distance between two adjacent light absorbing units 701 is 5 μm. In the second direction, the distance between two adjacent light absorbing units 701 is 5 micrometers.
Referring to fig. 3, the light absorbing unit 701 is a rectangular parallelepiped. The thickness of the light emitting layer was 20 microns.
When an external light source is incident into the display module 100, the incident light is not absorbed by the light absorbing layer 70 only when the incident angle is not greater than θ 1.
In this embodiment, θ 1 is arctan (2.5/20).
Referring to fig. 4, the light absorbing unit 701 is a triangular prism. The thickness of the light emitting layer was 10 microns.
When an external light source is incident into the display module 100, the incident light is not absorbed by the light absorbing layer 70 only when the incident angle is not greater than θ 2.
In this embodiment, θ 2 is arctan (2.5/10).
In one embodiment, the shape of the light absorbing unit 701 and the thickness of the light emitting layer are not limited to the above two cases.
A cover plate layer 80 positioned over the light absorbing layer 70.
In one embodiment, the cover plate layer 80 may be prepared in advance and bonded directly to the underlying film structure by an optical adhesive.
In one embodiment, the cover plate layer 80 may be formed directly on the light absorbing layer 70 by a deposition process.
According to the invention, the light absorption layer for absorbing the external light source is arranged on the touch layer, and the light absorption units in the light absorption layer are distributed on the touch layer in an array manner, so that the influence of the external light source on the OLED display is greatly reduced, the loss of light intensity energy generated by the light emitting layer in the OLED display is avoided, and the contrast and the service life of the OLED display are improved.
In one embodiment, the display device includes, but is not limited to, a mobile phone, a tablet computer, a computer monitor, a game machine, a television, a display screen, a wearable device, and other life or household appliances with display function.
The invention provides a display module and a display device, wherein the display module comprises a display panel; a touch layer on the display panel; the cover plate layer is positioned on the touch layer; a light absorbing layer positioned between the touch layer and the cover plate layer; wherein, the light absorption layer comprises at least two light absorption units distributed in an array. According to the invention, the light absorption layer for absorbing the external light source is arranged on the touch layer, and the light absorption units in the light absorption layer are distributed on the touch layer in an array manner, so that the influence of the external light source on the OLED display is greatly reduced, the loss of light intensity energy generated by the light emitting layer in the OLED display is avoided, and the contrast and the service life of the OLED display are improved.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.

Claims (10)

1. A display module, comprising:
the OLED display panel comprises a substrate, a thin film transistor layer, a light emitting device layer and an encapsulation layer, wherein the thin film transistor layer is positioned on the substrate, the light emitting device layer is positioned on the thin film transistor layer, and the encapsulation layer is positioned on the light emitting device layer;
the touch layer is positioned on the packaging layer and is directly deposited on the packaging layer through a deposition process; the cover plate layer is positioned on the touch layer; and
a light absorbing layer positioned between the touch layer and the cover plate layer;
wherein, the light absorption layer comprises at least two light absorption units distributed in an array.
2. The display module of claim 1, wherein the light absorbing layer is made of a composition of one or more of graphite or metal oxide.
3. The display module according to claim 1, wherein the distance between two adjacent light absorbing units in the first direction or the second direction is equal.
4. The display module according to claim 1, wherein an orthographic projection area of the light absorbing unit on the touch layer is one or a combination of more than one of a square, a rectangle or a circle.
5. The display module of claim 1, further comprising a color film layer between the touch layer and the light absorbing layer.
6. The utility model provides a display device, includes the display module assembly, its characterized in that, the display module assembly includes:
the OLED display panel comprises a substrate, a thin film transistor layer, a light emitting device layer and an encapsulation layer, wherein the thin film transistor layer is positioned on the substrate, the light emitting device layer is positioned on the thin film transistor layer, and the encapsulation layer is positioned on the light emitting device layer;
the touch layer is positioned on the packaging layer and is directly deposited on the packaging layer through a deposition process;
the cover plate layer is positioned on the touch layer; and
a light absorbing layer positioned between the touch layer and the cover plate layer;
wherein, the light absorption layer comprises at least two light absorption units distributed in an array.
7. The display device according to claim 6, wherein the material of the light absorbing layer is a composition of one or more of graphite or metal oxide.
8. The display device according to claim 6, wherein the adjacent two light absorption units have equal spacing in the first direction or the second direction.
9. The display device according to claim 6, wherein an orthographic projection area of the light absorption unit on the touch layer is one or a combination of more than one of a square, a rectangle or a circle.
10. The display device according to claim 6, wherein the display module further comprises a color film layer, and the color film layer is located between the touch layer and the light absorbing layer.
CN201811470471.3A 2018-12-04 2018-12-04 Display module and display device Active CN109411524B (en)

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