CN118471092A - Display module, display screen and electronic equipment - Google Patents
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- CN118471092A CN118471092A CN202311770434.5A CN202311770434A CN118471092A CN 118471092 A CN118471092 A CN 118471092A CN 202311770434 A CN202311770434 A CN 202311770434A CN 118471092 A CN118471092 A CN 118471092A
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Abstract
The embodiment of the application provides a display module, a display screen and electronic equipment, wherein the display module at least comprises a light-emitting layer and a polarizing layer which are arranged in a stacked manner; the light emitting layer includes: a plurality of pixel structures and a pixel definition layer for separating the different pixel structures; a metal isolation column is arranged between two adjacent pixel structures, and the metal isolation column is positioned at one side of the pixel definition layer facing the polarizing layer; further comprises: a plurality of cholesteric liquid crystal layers; the cholesteric liquid crystal layer is positioned between two adjacent metal isolation columns, the cholesteric liquid crystal layer is positioned on one side of the pixel structure facing the polarizing layer, and the orthographic projection of the pixel structure in the thickness direction of the display module is positioned in the orthographic projection of the cholesteric liquid crystal layer in the thickness direction of the display module. Like this, can alleviate or solve the technical problem that reflectivity and integrative black effect of display module assembly become poor (bluing) to can optimize the display effect of display screen, and then can promote the visual experience of consumer when using electronic equipment.
Description
Technical Field
The embodiment of the application relates to the technical field of terminals, in particular to a display module, a display screen and electronic equipment.
Background
At present, electronic equipment such as mobile phones and computers are indistinguishable from our lives, are visible everywhere in life, and greatly improve the living standard of people. With the rapid development of the technology of communication equipment, the related display screen industry is also continuously developed, so that the application range of the display screen is wider and wider.
In the related art, a display screen generally includes a display module and a glass cover plate, where the glass cover plate is located above the display module. The display module generally comprises a substrate layer, a light-emitting layer and a packaging layer which are sequentially stacked, wherein in order to improve the light-emitting brightness of the display module, a layer of cholesteric liquid crystal (cholesteric liquid crystal, CLC) is generally added between the light-emitting layer and the packaging layer, and because the pitch of the cholesteric liquid crystal is very sensitive to temperature, when the pitch is consistent with the wavelength of light, strong intensity selective reflection is generated, the cholesteric liquid crystal can directly emit left-handed polarized light in natural light emitted by the light-emitting layer through a polaroid, and right-handed polarized light is reflected by the cholesteric liquid crystal and then reflected by an electrode of the light-emitting layer to become left-handed polarized light and then emitted through the polaroid, so that the brightness of a certain color (usually blue) can be improved by 30% -50% through a brightness recycling mechanism.
However, in the above scheme, the blue light in the ambient light enters the display module and is reflected by the cholesteric liquid crystal and the electrode to form reflected light, so that the reflectivity and the integral black effect of the display module are poor (blue), the display effect of the display screen is affected, and the visual experience of a consumer when using the electronic device is further affected.
Disclosure of Invention
The embodiment of the application provides a display module, a display screen and electronic equipment, which can reduce or solve the technical problems of poor reflectivity and poor integral black effect (bluing) of the display module, so that the display effect of the display screen can be optimized, and further the visual experience of a consumer when the electronic equipment is used can be improved.
In a first aspect, an embodiment of the present application provides a display module, where the display module at least includes: a light-emitting layer and a polarizing layer which are laminated;
The light emitting layer includes: a plurality of pixel structures and a pixel definition layer for separating different ones of the pixel structures;
a metal isolation column is arranged between two adjacent pixel structures, and the metal isolation column is positioned at one side of the pixel definition layer, which faces the polarizing layer;
further comprises: a plurality of cholesteric liquid crystal layers; the cholesteric liquid crystal layer is positioned between two adjacent metal isolation columns, the cholesteric liquid crystal layer is positioned on one side of the pixel structure facing the polarizing layer, and the orthographic projection of the pixel structure in the thickness direction of the display module is positioned in the orthographic projection of the cholesteric liquid crystal layer in the thickness direction of the display module.
According to the display module provided by the embodiment of the application, the cholesteric liquid crystal layer is arranged between two adjacent metal isolation columns, the cholesteric liquid crystal layer is positioned on one side of the pixel structure facing the polarizing layer, and the orthographic projection of the pixel structure in the thickness direction of the display module is positioned in the orthographic projection of the cholesteric liquid crystal layer in the thickness direction of the display module, so that the cholesteric liquid crystal layer can realize recycling and brightening by utilizing the polarization reflection principle of light, in addition, the reflection problem of ambient light can be greatly relieved, and the technical problems of poor reflectivity and integral black effect (bluing) of the display module are reduced or solved, so that the display effect of the display screen can be optimized, and the visual experience of consumers when the electronic equipment is used can be further improved.
In one possible implementation, the cholesteric liquid crystal layer has a thickness of 0.5um to 3.5um.
In one possible implementation, the plurality of pixel structures includes at least: a red pixel structure, a green pixel structure, and a blue pixel structure;
The thickness of the cholesteric liquid crystal layer on the red pixel structure side is larger than that of the cholesteric liquid crystal layer on the green pixel structure side, and the thickness of the cholesteric liquid crystal layer on the green pixel structure side is larger than that of the cholesteric liquid crystal layer on the blue pixel structure side.
Based on wavelength differentiation of the red pixel structure, the green pixel structure and the blue pixel structure, the thickness of the cholesteric liquid crystal layer on one side of the red pixel structure is designed to be larger than that of the cholesteric liquid crystal layer on one side of the green pixel structure, and the thickness of the cholesteric liquid crystal layer on one side of the green pixel structure is larger than that of the cholesteric liquid crystal layer on one side of the blue pixel structure, so that the brightness of the pixel structures with different colors can be increased correspondingly through a brightness recycling mechanism.
In one possible implementation, the thickness of the cholesteric liquid crystal layer on one side of the red light pixel structure is 1.5um-3.5um;
the thickness of the cholesteric liquid crystal layer positioned at one side of the green pixel structure is 1um-3um;
The thickness of the cholesteric liquid crystal layer positioned at one side of the blue light pixel structure is 0.5um-2.5um.
In one possible implementation, the plurality of pixel structures includes at least: a red pixel structure, a green pixel structure, and a blue pixel structure;
The pitch of the cholesteric liquid crystal layer on the red pixel structure side is larger than that of the cholesteric liquid crystal layer on the green pixel structure side, and the pitch of the cholesteric liquid crystal layer on the green pixel structure side is larger than that of the cholesteric liquid crystal layer on the blue pixel structure side.
The cholesteric liquid crystal layer can selectively reflect one of left-handed and right-handed circularly polarized light with a specific wave band according to the difference of the self pitch and the rotation direction, and the rotation direction of the circularly polarized light is changed after the reflected circularly polarized light is reflected again by the reflecting electrode of the light-emitting panel, so that the circularly polarized light passes through the brightness enhancing layer. Therefore, based on wavelength differentiation of the red pixel structure, the green pixel structure and the blue pixel structure, the pitch of the cholesteric liquid crystal layer on the red pixel structure side is designed to be larger than the pitch of the cholesteric liquid crystal layer on the green pixel structure side, and the pitch of the cholesteric liquid crystal layer on the green pixel structure side is larger than the pitch of the cholesteric liquid crystal layer on the blue pixel structure side, so that the brightness of the pixel structures with different colors can be increased correspondingly through a brightness recycling mechanism.
In one possible implementation, the pitch of the cholesteric liquid crystal layer on one side of the red pixel structure is 370nm-430nm;
the pitch of the cholesteric liquid crystal layer positioned at one side of the green pixel structure is 340nm-380nm;
the pitch of the cholesteric liquid crystal layer positioned at one side of the blue light pixel structure is 270nm-320nm.
In one possible implementation, the projected area of the plurality of cholesteric liquid crystal layers onto the polarizing layer is less than 50% of the area of the polarizing layer. Compared with the prior art that the cholesteric liquid crystal layer is covered on the whole surface, the coverage rate of the cholesteric liquid crystal layer in the embodiment of the application is less than 50%, the reflection problem of ambient light can be greatly relieved, and the integral black effect is ensured.
In one possible implementation, the thickness of the pixel defining layer is 0.3um to 1.5um.
In one possible implementation, the orthographic projection of the metal isolation column in the thickness direction of the display module is located within the orthographic projection of the pixel defining layer in the thickness direction of the display module.
In one possible implementation, the thickness of the metal isolation column is 0.5um-2um.
In one possible implementation, the metal isolation column includes: a main body portion and a visor portion connected to the main body portion;
The main body part is positioned between the cap peak part and the pixel definition layer;
the width of the main body part near one end of the cap peak part is smaller than the width of the cap peak part, and the width of the main body part gradually becomes larger from one end near the cap peak part to one end far away from the cap peak part.
In one possible implementation manner, the main body portion is made of aluminum;
the hat brim is made of titanium.
In one possible implementation, the maximum width of the metal isolation column is 5um-20um.
In one possible implementation, the method further includes: a first encapsulation layer; the first packaging layer covers one surface of the metal isolation column, part of the pixel definition layer and the pixel structure, which faces the polarizing layer.
In a second aspect, an embodiment of the present application provides a display screen, including at least: a glass cover plate and any one of the display modules; the glass cover plate is covered on the display module.
The display screen provided by the embodiment of the application at least comprises the display module and the glass cover plate covered on the display module, wherein the cholesteric liquid crystal layer is arranged between two adjacent metal isolation columns, the cholesteric liquid crystal layer is positioned on one side of the pixel structure facing the polarizing layer, and the orthographic projection of the pixel structure in the thickness direction of the display module is positioned in the orthographic projection of the cholesteric liquid crystal layer in the thickness direction of the display module, so that the cholesteric liquid crystal layer can realize recycling and brightening by utilizing the polarization reflection principle of light, in addition, the reflection problem of ambient light can be greatly relieved, the technical problems of the reflectivity of the display module and the deterioration (bluing) of the integral black effect can be reduced or solved, the display effect of the display screen can be improved, and the visual experience of consumers when the electronic equipment is used can be further improved.
In a third aspect, an embodiment of the present application provides an electronic device, including at least: a middle frame and the display screen;
One end of the metal isolation column in the display screen is electrically connected with the cathode of the pixel structure, and the other end of the metal isolation column is electrically connected with the middle frame.
The electronic equipment at least comprises a display screen, wherein the display screen at least comprises a display module and a glass cover plate, a cholesteric liquid crystal layer is arranged between two adjacent metal isolation columns, the cholesteric liquid crystal layer is positioned on one side of a pixel structure facing a polarizing layer, and orthographic projection of the pixel structure in the thickness direction of the display module is positioned in orthographic projection of the cholesteric liquid crystal layer in the thickness direction of the display module, so that the cholesteric liquid crystal layer can realize recycling and brightening by utilizing the polarization reflection principle of light, in addition, the reflection problem of ambient light can be greatly relieved, the technical problems of poor reflectivity and integral black effect (bluing) of the display module are reduced or solved, the display effect of the display screen can be improved, and visual experience of consumers when the electronic equipment is used can be improved.
Drawings
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a schematic cross-sectional view of a display screen in an electronic device according to an embodiment of the present application;
fig. 4 is a schematic cross-sectional view of a display module in a display screen of an electronic device according to an embodiment of the present application;
Fig. 5 is a schematic cross-sectional view of a display module in a display screen of an electronic device according to an embodiment of the present application;
fig. 6 is a schematic process flow diagram of a manufacturing process of a display module of a display screen of an electronic device according to an embodiment of the application;
Fig. 7 is a schematic process flow diagram of a manufacturing process of a display module of a display screen of an electronic device according to an embodiment of the application;
Fig. 8 is a schematic process flow diagram of a manufacturing process of a display module of a display screen of an electronic device according to an embodiment of the application;
fig. 9 is a schematic process flow diagram of a manufacturing process of a display module of a display screen of an electronic device according to an embodiment of the application.
Reference numerals illustrate:
200-a mobile phone; 210-a display screen; 212-a first opening;
220-a middle frame assembly; 221-a metal middle frame; 2221-top bezel;
2222-bottom bezel; 2223-left side border; 2224-right side border;
230-a circuit board; 240-cell; 250-battery cover;
251-a second opening; 260-a front camera module; 270-a rear camera module;
211-glass cover plate; 100-a display module; 110-a light emitting layer;
A 111-red pixel structure; 112-green pixel structure; 113-blue light pixel structure;
114-a pixel definition layer; 115-metal isolation columns; 1151-a body portion;
1152-a visor; 120-a polarizing layer; 130-a cholesteric liquid crystal layer;
140-a first encapsulation layer; 150-a second encapsulation layer; 160-a third encapsulation layer;
170-substrate layer; 180-open area.
Detailed Description
The terminology used in the description of the embodiments of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application, as will be described in detail with reference to the accompanying drawings.
The embodiment of the application provides an electronic device, which may include, but is not limited to, mobile or fixed terminals with display screens, such as mobile phones, tablet computers, notebook computers, ultra-mobile personal computers (ultra-mobile personal computer, UMPC), handheld computers, touch televisions, interphones, netbooks, point of sale (POS) machines, personal Digital Assistants (PDAs), wearable devices, virtual reality devices, wireless U-discs, bluetooth sound/earphone/glasses, vehicle-mounted front-mounted devices, automobile recorders, security devices, and the like.
In the embodiment of the present application, the mobile phone 200 is taken as an example of the electronic device, and the mobile phone 200 provided in the embodiment of the present application may be a curved screen mobile phone, a flat screen mobile phone, a bar phone or a folding screen mobile phone, and the embodiment of the present application is taken as an example of the flat screen mobile phone 200.
Fig. 1 and fig. 2 show an overall structure and a split structure of a bar phone 200, respectively, and a display screen 210 of the phone 200 according to an embodiment of the present application may be a water drop screen, liu Haibing, a full screen or a hole digging screen (see fig. 1), for example, a first opening 212 is formed in the display screen 210, and the following description will take the hole digging screen as an example.
Referring to fig. 2, the mobile phone 200 may include: the display 210, the middle frame assembly 220, the battery cover 250, and the battery 240 between the middle frame assembly 220 and the battery cover 250, wherein the battery 240 may be disposed on a side of the middle frame assembly 220 facing the battery cover 250 (as shown in fig. 2), or the battery 240 may be disposed on a side of the middle frame assembly 220 facing the display 210, e.g., a side of the middle frame assembly 220 facing the battery cover 250 may have a battery compartment (not shown in the drawings) in which the battery 240 is mounted.
In some other examples, the cell phone 200 may further include a circuit board 230, wherein the circuit board 230 may be disposed on the middle frame assembly 220, for example, the circuit board 230 may be disposed on a side of the middle frame assembly 220 facing the battery cover 250 (as shown in fig. 2), or the circuit board 230 may be disposed on a side of the middle frame assembly 220 facing the display screen 210, with the display screen 210 and the battery cover 250 being located on opposite sides of the middle frame assembly 220, respectively.
The battery 240 may be connected to the charge management module and the circuit board 230 through a power management module, where the power management module receives input from the battery 240 and/or the charge management module and provides power to the processor, the internal memory, the external memory, the display 210, the camera module (e.g., the front camera module 260 and the rear camera module 270 in fig. 2), the communication module, and the like. The power management module can also be used for monitoring parameters such as battery capacity, battery cycle times, battery health status (leakage, impedance) and the like. In other embodiments, the power management module may also be disposed in the processor of the circuit board 230. In other embodiments, the power management module and the charge management module may be disposed in the same device.
When the mobile phone 200 is a flat-screen mobile phone 200, the display 210 may be an Organic Light-Emitting Diode (OLED) display or a Liquid crystal display (Liquid CRYSTAL DISPLAY, LCD), and when the mobile phone 200 is a curved-screen mobile phone 200, the display 210 may be an OLED display.
With continued reference to fig. 2, the middle frame assembly 220 may include a metal middle frame 221 and a rim disposed one revolution around the outer periphery of the metal middle frame 221. In general, the frame may include a top frame 2221, a bottom frame 2222, a left side frame 2223, and a right side frame 2224, the top frame 2221, the bottom frame 2222, the left side frame 2223, and the right side frame 2224 enclosing a frame in a square ring structure. The material of the metal middle frame 221 includes, but is not limited to, aluminum plate, aluminum alloy, stainless steel, steel-aluminum composite die-casting plate, titanium alloy or magnesium alloy, etc. The frame can be a metal frame, a ceramic frame or a glass frame. When the frame is a metal frame, the material of the metal frame includes, but is not limited to, aluminum alloy, stainless steel, steel-aluminum composite die-casting plate or titanium alloy. The metal middle frame 221 and the frame may be clamped, welded, adhered or integrally formed, or the metal middle frame 221 and the frame may be fixedly connected by injection molding.
Referring to fig. 2, the top frame 2221 and the bottom frame 2222 are oppositely disposed, the left side frame 2223 and the right side frame 2224 are oppositely disposed, the top frame 2221 is connected with one end of the left side frame 2223 and one end of the right side frame 2224 by a rounded corner, and the bottom frame 2222 is connected with the other end of the left side frame 2223 and the other end of the right side frame 2224 by a rounded corner, so as to form a rounded corner rectangular area together. The battery cover ground plane is disposed in the rounded rectangular area and is connected to the top frame 2221, the bottom frame 2222, the left side frame 2223 and the right side frame 2224, respectively. It is understood that the battery cover ground plane may be the battery cover 250 of the handset 200.
The battery cover 250 may be a metal battery cover, a glass battery cover, a plastic battery cover, or a ceramic battery cover, and in the embodiment of the present application, the material of the battery cover 250 is not limited, and is not limited to the above examples.
It should be noted that, in some examples, the battery cover 250 of the mobile phone 200 may be connected to the bezel to form an integrally formed (Unibody) battery cover, for example, the mobile phone 200 may include: the display 210, the metal middle frame 221 and the battery cover, the battery cover may be a battery cover formed by integrally forming (Unibody) the frame and the battery cover 250, so that the circuit board 230 and the battery 240 are located in a space surrounded by the metal middle frame 221 and the battery cover.
In one possible implementation, the battery cover 250 may further be provided with a second opening 251 as a light-transmitting area of the rear camera module 270. Similarly, the first opening 212 on the display 210 can also be used as a light-transmitting area of the front camera module 260.
It can be understood that, in the embodiment of the present application, as shown in fig. 1 and 2, the width direction of the electronic device is the x direction, the length direction of the electronic device is the y direction, and the thickness direction of the electronic device is the z direction. The length, width, and thickness in the embodiments of the present application are merely for convenience of description, and are not meant to limit the size. For example, the length may be greater than, equal to, or less than the width.
It should be understood that the structure illustrated in the embodiments of the present application does not constitute a specific limitation on the electronic device. In other embodiments of the application, the electronic device may include more or fewer components than shown, or certain components may be combined, or certain components may be split, or different arrangements of components. For example, the folding screen phone 200 may further include a camera module, a flash, and other devices.
In addition, referring to fig. 3, the display screen 210 includes at least the display module 100 and the glass cover 211, wherein the glass cover 211 may be located above the display module 100, specifically, the glass cover 211 may cover the display module 100, and the size of the glass cover 211 may be greater than or equal to the size of the display module 100.
In the embodiment of the present application, the display module 100 and the glass cover plate 211 may be connected by an adhesive layer, specifically, the display module 100 and the glass cover plate 211 may be adhered by Optical glue (Optical CLEAR ADHESIVE, OCA), however, in other examples, the display module 100 and the glass cover plate 211 may be adhered to each other by other, for example, the display module 100 and the glass cover plate 211 may be hot-pressed to form the display screen 210.
In the related art, the display module generally includes a substrate layer, a light-emitting layer and a packaging layer which are sequentially stacked, wherein, in order to improve the light-emitting brightness of the display module, a layer of cholesteric liquid crystal (cholesteric liquid crystal, CLC) is generally added between the light-emitting layer and the packaging layer, and because the pitch of the cholesteric liquid crystal is very sensitive to temperature, when the pitch is consistent with the wavelength of light, the cholesteric liquid crystal can generate strong intensity selective reflection, the cholesteric liquid crystal can directly emit the left-handed polarized light in the natural light emitted by the light-emitting layer through the polaroid, and the right-handed polarized light is reflected by the cholesteric liquid crystal and then is reflected by the electrode of the light-emitting layer to become the left-handed polarized light and then emitted through the polaroid, so that the brightness of a certain color (usually blue) can be improved by a brightness recovery mechanism.
But blue light in the ambient light also can form reflected light after entering into the display module assembly by cholesteric liquid crystal and electrode reflection, leads to reflectivity of the display module assembly and the degradation of integrative black effect (bluing), thereby can influence the display effect of display screen, and then can influence the visual experience of consumer when using electronic equipment.
Based on this, the embodiment of the application provides a new display module 100, and the display module 100 can be applied to an electronic device (such as a mobile phone or a computer) with a display screen to solve the above technical problems. In the electronic equipment, the display module at least comprises a light-emitting layer and a polarizing layer which are stacked; the light emitting layer includes: a plurality of pixel structures and a pixel definition layer for separating the different pixel structures; a metal isolation column is arranged between two adjacent pixel structures, and the metal isolation column is positioned at one side of the pixel definition layer facing the polarizing layer; further comprises: a plurality of cholesteric liquid crystal layers; the cholesteric liquid crystal layer is positioned between two adjacent metal isolation columns, the cholesteric liquid crystal layer is positioned on one side of the pixel structure facing the polarizing layer, and the orthographic projection of the pixel structure in the thickness direction of the display module is positioned in the orthographic projection of the cholesteric liquid crystal layer in the thickness direction of the display module. Like this, can alleviate or solve the technical problem that reflectivity and integrative black effect of display module assembly become poor (bluing) to can optimize the display effect of display screen, and then can promote the visual experience of consumer when using electronic equipment.
The following describes the specific structure of the display module in detail by taking different embodiments as examples with reference to the specific drawings.
Referring to fig. 4, an embodiment of the present application provides a display module 100, where the display module 100 may be applied to a display screen 210, and specifically, the display module 100 may at least include: the light emitting layer 110 and the polarizing layer 120 are stacked, wherein the polarizing layer 120 can help to adjust an optical mode of the display module 100, and the light emitting layer 110 may include: the pixel definition layer 114 and a plurality of pixel structures (i.e., a plurality of red pixel structures 111, a plurality of green pixel structures 112 and a plurality of blue pixel structures 113), the pixel definition layer 114 is used to separate the different pixel structures.
A metal isolation pillar 115 may be further disposed between two adjacent pixel structures, where the metal isolation pillar 115 is located at a side of the pixel defining layer 114 facing the polarizing layer 120. At this time, the metal isolation column 115 is located between the pixel structure and the pixel structure, and the lateral hole cannot be transferred to the adjacent pixel structure through the metal isolation column 115, so that the crosstalk can be improved.
In this embodiment of the present application, the orthographic projection of the metal isolation pillar 115 in the thickness direction of the display module 100 may be located within the orthographic projection of the pixel defining layer 114 in the thickness direction of the display module 100.
In addition, it is understood that one end of the metal isolation column 115 may be electrically connected to the cathode of the pixel structure, and the other end of the metal isolation column 115 may be electrically connected to the middle frame assembly 220.
The display module 100 may further include: the cholesteric liquid crystal layers 130 can directly emit the left-handed polarized light in the emitted natural light through the polarizing layer 120, and the right-handed polarized light is reflected by the cholesteric liquid crystal layers 130 and then reflected by the electrodes of the pixel structure to become the left-handed polarized light and then emitted through the polarizing layer 120, so that the brightness of a certain color (usually blue) can be improved by 30% -50% through a brightness recycling mechanism.
In the embodiment of the present application, the cholesteric liquid crystal layer 130 is located between two adjacent metal isolation columns 115, the cholesteric liquid crystal layer 130 is located on a side of the pixel structure facing the polarizing layer 120, and the orthographic projection of the pixel structure in the thickness direction of the display module 100 is located in the orthographic projection of the cholesteric liquid crystal layer 130 in the thickness direction of the display module 100.
Like this, cholesteric liquid crystal layer 130 can utilize polarization reflection principle of light to realize retrieving the brightening, can alleviate the reflection problem of ambient light greatly in addition, lighten or solve the reflectivity of display module 100 and integrative black effect and become poor (bluish) technical problem to can optimize the display effect of display screen, and then can promote the visual experience of consumer when using electronic equipment.
In one possible implementation, the thickness of the cholesteric liquid crystal layer 130 may be 0.5um-3.5um. Illustratively, the thickness of the cholesteric liquid crystal layer 130 may be 0.5um, 1um, 1.5um, 2um, 2.5um, 3um, or 3.5um, etc., which the embodiments of the present application are not limited to nor to the above examples.
In an embodiment of the present application, the plurality of pixel structures may at least include: the thickness of the cholesteric liquid crystal layer 130 on the side of the red pixel structure 111 may be greater than the thickness of the cholesteric liquid crystal layer 130 on the side of the green pixel structure 112, and the thickness of the cholesteric liquid crystal layer 130 on the side of the green pixel structure 112 may be greater than the thickness of the cholesteric liquid crystal layer 130 on the side of the blue pixel structure 113, as shown in fig. 5, among others, the red pixel structure 111, the green pixel structure 112, and the blue pixel structure 113.
Based on the wavelength differentiation of the red pixel structure 111, the green pixel structure 112 and the blue pixel structure 113, the thickness of the cholesteric liquid crystal layer 130 on the red pixel structure 111 side is designed to be larger than the thickness of the cholesteric liquid crystal layer 130 on the green pixel structure 112 side, and the thickness of the cholesteric liquid crystal layer 130 on the green pixel structure 112 side is larger than the thickness of the cholesteric liquid crystal layer 130 on the blue pixel structure 113 side, so that the brightness of the pixel structures with different colors can be increased correspondingly by a brightness recycling mechanism.
Specifically, in the embodiment of the present application, the thickness of the cholesteric liquid crystal layer 130 on the red light pixel structure 111 side may be 1.5um to 3.5um, the thickness of the cholesteric liquid crystal layer 130 on the green light pixel structure 112 side may be 1um to 3um, and the thickness of the cholesteric liquid crystal layer 130 on the blue light pixel structure 113 side may be 0.5um to 2.5um.
It can be understood that the molecular structure of the cholesteric liquid crystal layer is spiral, and the cholesteric liquid crystal layers with different pitches correspondingly regulate and reflect light with different wavelengths.
The reflection wavelength λ and the pitch P are as follows: λ=n×p×cos θ, n is the refractive index of the cholesteric liquid crystal layer, and θ is the angle between the incident light and the helical axis of the cholesteric liquid crystal layer.
Alternatively, in some embodiments, the pitch of the cholesteric liquid crystal layer 130 on the side of the red pixel structure 111 may be greater than the pitch of the cholesteric liquid crystal layer 130 on the side of the green pixel structure 112, and the pitch of the cholesteric liquid crystal layer 130 on the side of the green pixel structure 112 may be greater than the pitch of the cholesteric liquid crystal layer 130 on the side of the blue pixel structure 113.
The cholesteric liquid crystal layer can selectively reflect one of left-handed and right-handed circularly polarized light with a specific wave band according to the difference of the self pitch and the rotation direction, and the rotation direction of the circularly polarized light is changed after the reflected circularly polarized light is reflected again by the reflecting electrode of the light-emitting panel, so that the circularly polarized light passes through the brightness enhancing layer.
Thus, the pitch of the cholesteric liquid crystal layer 130 on the red pixel structure 111 side is designed to be larger than the pitch of the cholesteric liquid crystal layer 130 on the green pixel structure 112 side based on the wavelength differentiation of the red pixel structure 111, the green pixel structure 112 and the blue pixel structure 113 themselves, and the pitch of the cholesteric liquid crystal layer 130 on the green pixel structure 112 side is larger than the pitch of the cholesteric liquid crystal layer 130 on the blue pixel structure 113 side, so that the luminance of the pixel structures of different colors can be increased correspondingly by the luminance recycling mechanism better.
Illustratively, in the embodiment of the present application, the pitch of the cholesteric liquid crystal layer 130 on the side of the red pixel structure 111 may range from 370nm to 430nm, the pitch of the cholesteric liquid crystal layer 130 on the side of the green pixel structure 112 may range from 340nm to 380nm, and the pitch of the cholesteric liquid crystal layer 130 on the side of the blue pixel structure 113 may range from 270nm to 320nm.
In addition, the adjustment of refractive index and θ by the cholesteric liquid crystal layer is combined, so that the cholesteric liquid crystal layer 130 on the red light pixel structure 111 side, the cholesteric liquid crystal layer 130 on the green light pixel structure 112 side and the cholesteric liquid crystal layer 130 on the blue light pixel structure 113 side can reflect the corresponding red-green-blue band left-handed or right-handed circularly polarized light, and has a brightening effect on all pixel structures.
In an embodiment of the present application, the projected area of the plurality of cholesteric liquid crystal layers 130 on the polarizing layer 120 may be less than 50% of the area of the polarizing layer 120. Compared with the prior art that the cholesteric liquid crystal layer 130 is covered on the whole surface, the coverage rate of the cholesteric liquid crystal layer 130 in the embodiment of the application is less than 50%, so that the reflection problem of ambient light can be greatly relieved, and the integral black effect is ensured.
In an embodiment of the present application, the thickness of the pixel defining layer 114 may be 0.3um to 1.5um. Illustratively, the thickness of the pixel defining layer 114 may be 0.3um, 0.5um, 0.7um, 0.9um, 1.1um, 1.3um, or 1.5um, etc., which the embodiments of the present application are not limited to, nor are they limited to, the above examples.
In an embodiment of the present application, the thickness of the metal isolation pillars 115 may be 0.5um-2um. Illustratively, the thickness of the metal isolation pillars 115 may be 0.5um, 0.8um, 1um, 1.2um, 1.5um, 1.8um, or 2um, which is not limited by the embodiments of the present application and the examples described above.
In an embodiment of the present application, the metal isolation post 115 may have a cap peak structure, and in particular, the metal isolation post 115 may include: the main body 1151 and the cap peak 1152, wherein the cap peak 1152 is connected to the main body 1151, the main body 1151 is located between the cap peak 1152 and the pixel defining layer 114, a width of an end of the main body 1151 near the cap peak 1152 is smaller than a width of the cap peak 1152, and the width of the main body 1151 gradually increases from an end near the cap peak 1152 to an end far from the cap peak 1152.
In some embodiments, the main body 1151 may be aluminum and the visor 1152 may be titanium.
In embodiments of the present application, the maximum width of the metal spacer 115 may be 5um to 20um. Illustratively, the maximum width of the metal isolation pillars 115 may be 5um, 8um, 10um, 12um, 15um, 18um, 20um, or the like, which is not limited by the embodiments of the present application, nor by the above examples.
It should be noted that, the numerical values and numerical ranges referred to in the present application are approximate values, and may have a certain range of errors due to the influence of the manufacturing process, and those errors may be considered to be negligible by those skilled in the art.
In an embodiment of the present application, the display module 100 may further include: the first encapsulation layer 140, wherein the first encapsulation layer 140 may cover the metal isolation pillars 115, a portion of the pixel defining layer 114, and a side of the pixel structure facing the polarizing layer 120.
The first encapsulation layer 140 may be made of an inorganic material, and in particular, the first encapsulation layer 140 may be formed by Chemical vapor deposition (Chemical VaporDeposition, CVD). Illustratively, the material used for the first encapsulation layer 140 may be silicon nitride or silicon oxide, which is not limited in the embodiments of the present application, and is not limited in the above examples.
The display module 100 may further include: and a second encapsulation layer 150, wherein the second encapsulation layer 150 may cover the cholesteric liquid crystal layer 130 and a portion of the first encapsulation layer 140 facing the polarizing layer 120.
The second encapsulation layer 150 may be made of an organic material, and in particular, the second encapsulation layer 150 may be formed by Inkjet-printing (IJP). Illustratively, the material used for the second encapsulation layer 150 may be a resin material, such as Polyimide (PI), and the embodiment of the present application is not limited thereto, and is not limited to the above examples.
The display module 100 may further include: and a third encapsulation layer 160, wherein the third encapsulation layer 160 may cover a side of the second encapsulation layer 150 facing the polarizing layer 120, and the third encapsulation layer 160 is located between the second encapsulation layer 150 and the polarizing layer 120 as shown in fig. 4 or 5.
The third encapsulation layer 160 may be made of an inorganic material, and in particular, the third encapsulation layer 160 may be formed by Chemical vapor deposition (Chemical VaporDeposition, CVD). Illustratively, the material used for the third encapsulation layer 160 may be silicon nitride or silicon oxide, which is not limited in the embodiments of the present application, and is not limited in the above examples.
In an embodiment of the present application, the glass cover plate 211 may cover a surface of the polarizing layer 120 facing away from the third encapsulation layer 160. The glass cover plate 211 can protect the polarizing layer 120, so as to prevent the polarizing layer 120 from being damaged or rubbed by the outside, and influence the usability of the display module 100.
The polarizing layer 120 and the glass cover plate 211 may be connected by an adhesive layer, and in particular, the polarizing layer 120 and the glass cover plate 211 may be connected by an adhesive layer. The bonding layer can be made of Optical cement (Optical CLEAR ADHESIVE, OCA), and the Optical cement is made of transparent materials and has good Optical effect.
Of course, in other examples, the polarizing layer 120 and the glass cover plate 211 may be adhered to each other in other manners, for example, the polarizing layer 120 and the glass cover plate 211 may be hot pressed to form the display screen 210, which is not limited in the embodiment of the present application, and is not limited in the above examples.
In an embodiment of the present application, the display module 100 may further include: a substrate layer 170, wherein the substrate layer 170 may be located on a side of the pixel defining layer 114 and the pixel structure facing away from the polarizing layer 120. The substrate layer 170 can provide support for the entire display module 100.
It will be appreciated that in embodiments of the present application, the use of the patterned cholesteric liquid crystal layer 130 between the metal spacer posts 115 also improves the flatness of the substrate layer 170, while allowing for a reduction in the thickness of the second encapsulation layer 150.
In some embodiments, the substrate layer 170 may employ a thin film transistor (thin film transistor, TFT), where each liquid crystal pixel on the liquid crystal display is driven by a thin film transistor integrated therein, so that high-speed, high-brightness and high-contrast display of screen information can be achieved.
A process for manufacturing the display module 100 according to an embodiment of the present application is described herein.
First, as shown in fig. 6, the pixel defining layer 114 is formed on the substrate layer 170 by exposure and development, where the pixel defining layer 114 may be an inorganic film layer or an organic film layer, and a pixel region is opened on the pixel defining layer 114 to reserve an opening region 180 for disposing a pixel structure. Wherein, the thickness of the pixel defining layer 114 may be 0.3um-1.5um,
Next, as shown in fig. 7, the metal isolation pillars 115 are formed on a side of the pixel defining layer 114 facing away from the substrate layer 170 between adjacent opening regions 180, and in particular, the metal isolation pillars 115 may be formed on a side of the pixel defining layer 114 facing away from the substrate layer 170 using a dry etching process.
The thickness of the metal isolation column 115 may be 0.5um to 2um, and the maximum width of the metal isolation column 115 may be 5um to 20um.
Then, a pixel structure of a certain color (e.g., red pixel structure 111) is deposited over the entire surface in fig. 7, and in particular, a pixel structure of a certain color (e.g., red pixel structure 111) may be deposited over the entire surface by a vacuum evaporation process, and then the first encapsulation layer 140 is deposited. Taking the example of depositing the red pixel structure 111 over the whole surface, the yellow process is used to form a protection layer over the red pixel structure 111, and then the first encapsulation layer 140 over the green pixel structure 112 region and the blue pixel structure 113 region is removed, for example, a dry etching method may be used to remove the first encapsulation layer 140 over the green pixel structure 112 region and the blue pixel structure 113 region.
The red pixel structure 111 in the region of the green pixel structure 112 and the blue pixel structure 113 may then be removed using a stripping solution to obtain the red pixel structure 111 and the first encapsulation layer 140 in the region of the red pixel structure 111. The corresponding pixel structure and first encapsulation layer 140 are then formed in the green pixel structure 112 region and blue pixel structure 113 region according to the above-described procedure to form the structure shown in fig. 8.
In addition, as shown in fig. 9, a cholesteric liquid crystal layer 130 is disposed on a side of the pixel structure between adjacent metal isolation columns 115 facing away from the substrate layer 170, and specifically, the cholesteric liquid crystal layer 130 may be printed on a side of the pixel structure between adjacent metal isolation columns 115 facing away from the substrate layer 170 by using an inkjet printing process above the first encapsulation layer 140, wherein the thickness of the cholesteric liquid crystal layer 130 may be 0.5um to 3.5um.
With continued reference to fig. 9, a second encapsulation layer 150 for encapsulation is formed on the cholesteric liquid crystal layer 130 and a portion of the first encapsulation layer 140 facing the polarizing layer 120, and finally a third encapsulation layer 160 is deposited on a surface of the second encapsulation layer 150 facing the polarizing layer 120, and the polarizing layer 120, the optical adhesive and the glass cover plate are sequentially attached to form the display module 100 for brightness enhancement as shown in fig. 9.
In describing embodiments of the present application, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "coupled" should be construed broadly, and may be, for example, fixedly coupled, indirectly coupled through an intermediary, in communication between two elements, or in an interaction relationship between two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.
The embodiments of the application may be implemented or realized in any number of ways, including as a matter of course, such that the apparatus or elements recited in the claims are not necessarily oriented or configured to operate in any particular manner. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more unless specifically stated otherwise.
The terms first, second, third, fourth and the like in the description and in the claims and in the above-described figures, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented, for example, in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "may include" and "have," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: the foregoing embodiments are merely for illustrating the technical solution of the embodiments of the present application, and are not limited thereto, and although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical schemes described in the foregoing embodiments may be modified or some or all of the technical features may be replaced equivalently, and these modifications or replacements do not make the essence of the corresponding technical schemes deviate from the scope of the technical schemes of the embodiments of the present application.
Claims (16)
1. A display module, characterized in that it at least comprises:
a light-emitting layer and a polarizing layer which are laminated;
The light emitting layer includes: a plurality of pixel structures and a pixel definition layer for separating different ones of the pixel structures;
a metal isolation column is arranged between two adjacent pixel structures, and the metal isolation column is positioned at one side of the pixel definition layer, which faces the polarizing layer;
further comprises: a plurality of cholesteric liquid crystal layers; the cholesteric liquid crystal layer is positioned between two adjacent metal isolation columns, the cholesteric liquid crystal layer is positioned on one side of the pixel structure facing the polarizing layer, and the orthographic projection of the pixel structure in the thickness direction of the display module is positioned in the orthographic projection of the cholesteric liquid crystal layer in the thickness direction of the display module.
2. The display module of claim 1, wherein the cholesteric liquid crystal layer has a thickness of 0.5um to 3.5um.
3. The display module of claim 1, wherein the plurality of pixel structures comprises at least: a red pixel structure, a green pixel structure, and a blue pixel structure;
The thickness of the cholesteric liquid crystal layer on the red pixel structure side is larger than that of the cholesteric liquid crystal layer on the green pixel structure side, and the thickness of the cholesteric liquid crystal layer on the green pixel structure side is larger than that of the cholesteric liquid crystal layer on the blue pixel structure side.
4. A display module according to claim 3, wherein the thickness of the cholesteric liquid crystal layer on the red pixel structure side is 1.5um-3.5um;
the thickness of the cholesteric liquid crystal layer positioned at one side of the green pixel structure is 1um-3um;
The thickness of the cholesteric liquid crystal layer positioned at one side of the blue light pixel structure is 0.5um-2.5um.
5. The display module of claim 1 or 2, wherein the plurality of pixel structures comprises at least: a red pixel structure, a green pixel structure, and a blue pixel structure;
The pitch of the cholesteric liquid crystal layer on the red pixel structure side is larger than that of the cholesteric liquid crystal layer on the green pixel structure side, and the pitch of the cholesteric liquid crystal layer on the green pixel structure side is larger than that of the cholesteric liquid crystal layer on the blue pixel structure side.
6. The display module of claim 5, wherein the pitch of the cholesteric liquid crystal layer on the red pixel structure side is 370nm-430nm;
the pitch of the cholesteric liquid crystal layer positioned at one side of the green pixel structure is 340nm-380nm;
the pitch of the cholesteric liquid crystal layer positioned at one side of the blue light pixel structure is 270nm-320nm.
7. The display module of any one of claims 1-6, wherein a projected area of the plurality of cholesteric liquid crystal layers on the polarizing layer is less than 50% of an area of the polarizing layer.
8. The display module of any one of claims 1-7, wherein the thickness of the pixel defining layer is 0.3um to 1.5um.
9. The display module of any one of claims 1-8, wherein the orthographic projection of the metal spacer in the thickness direction of the display module is located within the orthographic projection of the pixel defining layer in the thickness direction of the display module.
10. The display module of any one of claims 1-9, wherein the thickness of the metal spacer is 0.5um-2um.
11. The display module assembly of any one of claims 1-10, wherein the metal spacer includes: a main body portion and a visor portion connected to the main body portion;
The main body part is positioned between the cap peak part and the pixel definition layer;
the width of the main body part near one end of the cap peak part is smaller than the width of the cap peak part, and the width of the main body part gradually becomes larger from one end near the cap peak part to one end far away from the cap peak part.
12. The display module of claim 11, wherein the main body is made of aluminum;
the hat brim is made of titanium.
13. The display module of claim 11 or 12, wherein the metal spacer has a maximum width of 5um to 20um.
14. The display module assembly of any one of claims 1-13, further comprising: a first encapsulation layer; the first packaging layer covers one surface of the metal isolation column, part of the pixel definition layer and the pixel structure, which faces the polarizing layer.
15. A display screen, comprising at least: a glass cover plate and a display module according to any one of the preceding claims 1-14;
The glass cover plate is covered on the display module.
16. An electronic device, comprising at least: a middle frame and a display screen according to claim 15;
One end of the metal isolation column in the display screen is electrically connected with the cathode of the pixel structure, and the other end of the metal isolation column is electrically connected with the middle frame.
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