CN115061309A - Display device and manufacturing method thereof - Google Patents
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- CN115061309A CN115061309A CN202210851898.8A CN202210851898A CN115061309A CN 115061309 A CN115061309 A CN 115061309A CN 202210851898 A CN202210851898 A CN 202210851898A CN 115061309 A CN115061309 A CN 115061309A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133553—Reflecting elements
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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
Abstract
The application discloses a display device and a manufacturing method of the display device, wherein the display device comprises a plurality of mutually independent sub-pixel areas, a light source array and a color conversion structure positioned on the light emitting side of the light source array, the color conversion structure comprises a plurality of mutually independent color conversion layers which are alternately arranged on a specular reflection layer and a specular reflection layer, and each color conversion layer corresponds to each sub-pixel area one by one; the light emitted by the light source array irradiates each sub-pixel area; each color conversion layer is used for converting the light emitted by the light source array through a color gamut to obtain the light of the color corresponding to the sub-pixel area; the mirror reflection layer is used for reflecting natural light to perform mirror display. The display device can realize mutual independence of the reflection area and the display area, so that the reflection area does not need to be compatible with reflection and light transmission functions at the same time, natural light can be completely reflected, light emitted by the light source array can be comprehensively and effectively converted into light with corresponding colors in the sub-pixel area, and the reflection and display effects are improved.
Description
Technical Field
The invention relates to the technical field of display equipment, in particular to a display device and a manufacturing method of the display device.
Background
With the rapid development of display technologies, display products have been increasingly applied to various fields with the capability of displaying rich and colorful color information, and meet more demands of users on display devices. Wherein, in the health field, in order to enlarge display device's range of application, can increase the effect of specular reflection with the display to make the user not only can observe oneself specular reflection image at any time at the motion in-process, with the adjustment motion gesture, can watch video information, live TV etc. in the motion in-process moreover.
Currently, a mirror display in the related art is obtained by combining a static display glass having a very high reflectance and a certain transmittance with a liquid crystal display device. In the use process, when the liquid crystal display device is closed, the mirror display glass has a mirror reflection function, and when the liquid crystal display device is opened, a part of light penetrates through the liquid crystal display device, so that the function of displaying pictures can be realized.
However, the liquid crystal display device in this scheme has low self-luminance, and the mirror display glass causes luminance loss, so that in an environment with higher luminance, insufficient luminance of the liquid crystal display device causes poor display effect, and when the liquid crystal display device is turned on, display and reflection phenomena exist in a display area at the same time, and the superposition of the reflection and display functions causes poor effects of the two.
Disclosure of Invention
In view of the above-mentioned defects or shortcomings in the prior art, it is desirable to provide a display device and a method for manufacturing the display device, which can avoid the problem of poor contrast ratio caused by the mixture of the reflected light and the display light, thereby improving the mirror reflection and the image display effect.
In a first aspect, an embodiment of the present application provides a display device, including a plurality of mutually independent sub-pixel regions, a light source array, and a color conversion structure located on a light exit side of the light source array, where the color conversion structure includes a plurality of mutually independent color conversion layers alternately arranged by a specular reflection layer and a specular reflection layer, and each color conversion layer corresponds to each sub-pixel region one to one;
the light emitted by the light source array irradiates each sub-pixel area; each color conversion layer is used for converting the light emitted by the light source array through a color gamut to obtain light of a color corresponding to the sub-pixel area, so as to display a picture; the mirror reflection layer is used for reflecting natural light to perform mirror display.
In another embodiment of the present application, the color conversion structure further includes a plurality of mutually independent color filter layers, each color conversion layer is connected to the corresponding color filter layer, and the color filter layer is located on a side of the layer where the color conversion layer is located away from the light source array, and the color filter layer is used for filtering the residual light which is not subjected to color gamut conversion and has a color corresponding to the sub-pixel area where the color conversion layer is located, so as to display the image.
In another embodiment of the present application, the color conversion structure further includes a black matrix layer and a light-shielding layer, the light-shielding layer is located on one side of the layer where the specular reflection layer is located, which is close to the light source array, and the black matrix layer is connected to the specular reflection layer and the light-shielding layer respectively and is disposed between the specular reflection layer and the light-shielding layer; the black matrix layer and each color filter layer are alternately arranged, and the shading layer and each color conversion layer are alternately arranged;
the black matrix layer is used for shading light and preventing optical crosstalk between the color filter layers; the light-shielding layer is used for shielding light and preventing crosstalk of light irradiated between the conversion layers of the respective colors.
In another embodiment of the present application, a height of the color filter layer is greater than a height of the black matrix layer, and a height of the color conversion layer is greater than a height of the light-shielding layer.
In another embodiment of the present application, the color conversion structure further includes a first driving back plate, and the first driving back plate is located on a side of the layer where the specular reflection layer and the color conversion layer are located, the side being away from the light source array.
In another embodiment of the present application, the light source array includes a second driving back plate and a light source chip connected to the second driving back plate, and the light source chip is used for emitting light and irradiating to the color conversion structure.
In another embodiment of the present application, the display device further includes an encapsulation layer, and the light source array is interconnected with the color conversion structure through the encapsulation layer.
In a second aspect, the present application provides a method for manufacturing a display device, the method comprising:
providing a first driving backboard, and forming a color conversion structure on the first driving backboard; the color conversion structure comprises a plurality of mutually independent color conversion layers which are alternately arranged by a specular reflection layer and a specular reflection layer, each color conversion layer corresponds to each sub-pixel region one by one, and the specular reflection layer is used for reflecting natural light to perform mirror display; each color conversion layer is used for converting the light emitted by the light source array through a color gamut to obtain light of a color corresponding to the sub-pixel area, so as to display a picture;
providing a second driving backboard, and forming a light source array on the second driving backboard;
and carrying out group combination and lamination treatment on the light emitting side of the light source array and the color conversion structure to form a display device, wherein the display device comprises a plurality of mutually independent sub-pixel regions.
In another embodiment of the present application, forming a color conversion structure on a first driving backplane includes:
depositing mirror reflection layers on the first driving back plate at intervals according to preset sub-pixel intervals;
forming a black matrix layer on the mirror reflection layer by adopting a yellow light process;
forming a plurality of color filter layers between the mirror reflection layers by adopting a yellow light process, wherein the height of each color filter layer is greater than that of the black matrix layer;
forming a light shielding layer on the black matrix layer by adopting a yellow light process;
and depositing a corresponding color conversion layer on each color filter layer to obtain a color conversion structure, wherein the height of the color conversion layer is greater than that of the shading layer.
In another embodiment of this application, carry out the processing of laminating to the group at light source array light-emitting side and look transform structure, form display device, include:
cleaning, preprocessing and area distribution processing are sequentially carried out on the color conversion structure to obtain a processed structure;
coating frame glue on the processed structure;
and (3) carrying out assembly and bonding treatment on the light source array and the treated structure through frame glue, and carrying out lamination treatment and photocuring treatment by adopting a film coating process to obtain the display device.
To sum up, the display device and the manufacturing method of the display device provided in the embodiments of the present application include a plurality of mutually independent sub-pixel regions, a light source array, and a color conversion structure located on a light exit side of the light source array, where the color conversion structure includes a specular reflection layer and a plurality of mutually independent color conversion layers alternately arranged with the specular reflection layer, each color conversion layer corresponds to each sub-pixel region one to one, and light emitted by the light source array illuminates each sub-pixel region; each color conversion layer is used for converting light emitted by the light source array through a color gamut to obtain light of a color corresponding to the sub-pixel area, and the specular reflection layer is used for reflecting natural light to perform specular display. Compared with the prior art, this display device is owing to set up specular reflection layer and look conversion layer each other in turn, can realize reflection zone and display area mutual independence, make reflection zone need not compatible reflection and printing opacity function simultaneously, realize reflecting the natural light completely, the specular reflection effect has been improved, and through setting up look conversion architecture, can be comprehensively effective convert the light that the light source array sent into the light that the sub-pixel district of place corresponds the colour, the poor problem of contrast that reverberation and display light mixed light caused has been avoided, thereby to a great extent reflection and display effect have been improved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural diagram of a conventional display device provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a display device according to another embodiment of the present application;
fig. 4 is a schematic structural diagram of a display device according to another embodiment of the present application;
fig. 5 is a schematic structural diagram of a display device according to another embodiment of the present application;
fig. 6 is a schematic top view illustrating a display device according to another embodiment of the present disclosure;
fig. 7 is a schematic flowchart of a manufacturing method of a display device according to an embodiment of the present disclosure;
FIG. 8 is a schematic view of a process for fabricating a specular reflection layer according to another embodiment of the present disclosure;
fig. 9 is a schematic view of a process structure for fabricating a color conversion structure according to another embodiment of the present application;
FIG. 10 is a schematic view of a flow structure of a photolithography process according to another embodiment of the present application;
fig. 11 is a schematic view illustrating a flow structure of a pair-wise bonding process according to another embodiment of the present disclosure;
fig. 12 is a schematic structural diagram of a display device according to an embodiment of the present disclosure;
description of the reference numerals:
10-an array of light sources; 20-color conversion architecture; 30-an encapsulation layer; 101-a second drive backplane; 102-a light source chip; a filling layer-103; 201-specular reflection layer; 202-color conversion layer; 203-a color filter layer; 204-black matrix layer; 205-light-shielding layer; 206-first drive backplate.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort are within the protection scope of the present application.
The terms "first," "second," "third," "fourth," and the like in the description and claims of this application and in the above-described drawings, 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 is interchangeable under appropriate circumstances such that the embodiments of the application described are capable of operation in other sequences than those illustrated or described herein.
Moreover, the terms "comprises," "comprising," and any other variation 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 modules is not necessarily limited to those steps or modules explicitly listed, but may include other steps or modules not explicitly listed that are inherent to such process, method, article, or apparatus.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
It can be understood that with the vigorous development of display technology, display products have become indispensable social and entertainment tools in people's daily life, and in terms of practicality, the mirror display can be formed by adding the function of mirror reflection to the display products, so as to expand the application range. The mirror display can be applied to different places such as gymnasiums, star hotels, high-grade clubs and the like. In order to enable a user to better use a display product having a specular reflection function, it is very important to design and manufacture the structure of the product.
Referring to fig. 1, currently, a mirror display in the related art combines a display liquid crystal display and a mirror display glass by means of bonding or the like to form a mirror screen, so that when the display is in an on state, the light intensity transmitted through the mirror display glass is much greater than the natural reflected light formed on the surface of the mirror display glass, and the light of the display screen can be transmitted through the liquid crystal display, so that the imaging content of the display can be seen. However, the liquid crystal display device in this solution has low self-luminance, and the mirror display glass further causes luminance loss, so that when the liquid crystal display device is in an environment with high luminance, the liquid crystal display device has insufficient luminance, which results in poor display effect, and when the liquid crystal display device is turned on, the display and reflection phenomena exist in the display area at the same time, and the reflection and display functions are used in a superimposed manner, which results in poor effects of the two.
Based on above-mentioned defect, the application provides a display device, compared with the prior art, this display device is owing to set up light source array and look conversion structure, and set up specular reflection layer and look conversion layer in turn each other, can realize reflection zone and display area mutual independence, make reflection zone need not compatible reflection and printing opacity function simultaneously, realize reflecting the natural light completely, the specular reflection effect has been improved, and through setting up look conversion structure, can be effectively with the light conversion that light source array sent to the light source area correspond the light of colour in the sub-pixel district of place, the poor problem of contrast that reverberation and display light mixed light caused has been avoided, thereby to a great extent reflection and display effect have been improved.
The display device provided by this embodiment may include, but is not limited to, a liquid crystal panel, electronic paper, an LED panel, a smart phone, a Tablet Computer (Tablet Computer), a television, a display, a notebook Computer, a digital camera, a smart wearable device, a navigator and other products or components with a display function, and the like. Optionally, the smart wearable device may be a smart bracelet, a wearable smart watch, or the like.
For convenience of understanding and explanation, the display device and the method for manufacturing the display device according to the embodiment of the present application are described in detail below with reference to fig. 2 to 12.
Fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present disclosure, and as shown in fig. 2, the display device includes a plurality of mutually independent sub-pixel regions, a light source array 10, and a color conversion structure 20 located on a light emitting side of the light source array 10, where the color conversion structure 20 includes a plurality of mutually independent color conversion layers 202 alternately arranged by a specular reflection layer 201 and the specular reflection layer 201, and each color conversion layer 202 corresponds to each sub-pixel region one to one; the light emitted by the light source array 10 illuminates each sub-pixel region; each color conversion layer 202 is used for converting the light emitted by the light source array 10 through a color gamut to obtain light of a color corresponding to the sub-pixel area, so as to perform picture display; the specular reflection layer 201 is used to reflect natural light to perform specular display.
The display device in this embodiment may be: liquid Crystal Displays (LCDs), Organic Light-Emitting Diode (OLED) Display devices, Light-Emitting diodes (LEDs), Micro-LEDs (Micro-LEDs), mini-LEDs (mini-LEDs) Display devices, and the like.
The Mini LED is a Micro light-emitting diode, the LED Micro technology and the matrix technology are adopted, a high-density Micro-size LED array is integrated on a chip, the power consumption of the Micro LED is far less than that of an LCD, the OLED is self-luminous, the distance between pixels can be reduced from millimeter level to micrometer level, and the color saturation is close to that of the OLED.
In general, a Micro LED array is manufactured by a Micro Transfer Print (Micro Transfer Print) method, and after separating LED bare chips from a sapphire substrate by a laser lift-off technique, the LED bare chips are adsorbed from a supply substrate using a patterned Transfer substrate and transferred to a receiving substrate to obtain the Micro LED array.
In particular, when the display device is an LCD display device, the light source array may include a side-in type backlight or a direct-in type backlight; when the display device is an OLED display device, the light source array may include OLED devices; when the display device is a Micro LED display device, the light source array may include a Micro LED chip; when the display device is a mini LED display device, the light source array may include a mini LED chip.
Optionally, the plurality of mutually independent sub-pixel regions may include a red sub-pixel region, a green sub-pixel region, and a blue sub-pixel region, and may further include sub-pixel regions of other colors.
The structure of the light source array 10 may be a rectangular structure, a circular structure, or any other structure, which is not limited in this embodiment. The light source array can be to emitting light all around to with light emission to the colour conversion structure that is located light source array light-emitting side, so that the colour conversion structure carries out the colour gamut conversion with light and is the light that corresponds the colour in the sub-pixel district that is located.
The color conversion structure 20 may include a specular reflection layer 201 and a plurality of mutually independent color conversion layers 202 alternately disposed with the specular reflection layer 201, wherein each color conversion layer 202 corresponds to each sub-pixel region one by one, and when the sub-pixel region includes a red sub-pixel region, a green sub-pixel region, and a blue sub-pixel region, the corresponding color conversion layers are a red conversion layer R-QD, a green conversion layer G-QD, and a blue conversion layer B-QD, respectively.
The color conversion layer 202 may be made of a color conversion material, where the color conversion material is a material that converts light emitted from the light source array into light of a color corresponding to the sub-pixel region, where the color conversion layer corresponding to each different sub-pixel region is different, and accordingly, the color conversion material corresponding to each different color conversion layer is different. For example, the color conversion material corresponding to the red conversion layer R-QD is used to convert the light emitted by the light source array into the light with the color corresponding to the red sub-pixel region, the color conversion material corresponding to the green conversion layer G-QD is used to convert the light emitted by the light source array into the light with the color corresponding to the green sub-pixel region, and the color conversion material corresponding to the blue conversion layer B-QD is used to convert the light emitted by the light source array into the light with the color corresponding to the blue sub-pixel region.
Optionally, the color conversion material may be a Quantum Dot (QD) material, or may be an organic fluorescent dye. The Quantum Dot (QD) material is a novel nano material, the grain diameter of the material is between 2 and 20 nanometers, and the material can emit pure high-quality monochromatic light with concentrated energy spectrum after being excited by applying a certain electric field or light pressure to the nano semiconductor material.
The material of the specular reflection layer 201 may be a metal material, for example, silver or aluminum. The light transmittance of the specular reflection layer 201 is 100%, and the film thickness can be any thickness between 1nm and 10 um.
It can be understood that the Quantum Dot (QD) material has the characteristics of adjustable light-emitting wavelength, wide wavelength coverage, narrow and symmetrical fluorescence spectrum, high light-emitting efficiency and the like, and can efficiently realize the conversion of red and green colors. And Quantum Dot (QD) display technology belongs to the innovation semiconductor nanocrystal technique, can accurately carry light, and the high-efficient colour gamut value and the visual angle that promotes the display screen let the color purer bright-colored, make the color performance have more tension. The display device adopting the technology can generate dynamic colors with wider color gamut range, can display real color plates in image quality, and exceeds the backlight technology in the traditional sense.
The display device provided by the embodiment of the application comprises a plurality of mutually independent sub-pixel areas, a light source array and a color conversion structure positioned on the light emitting side of the light source array, wherein the color conversion structure comprises a specular reflection layer and a plurality of mutually independent color conversion layers which are alternately arranged with the specular reflection layer, each color conversion layer corresponds to each sub-pixel area one by one, and light emitted by the light source array irradiates each sub-pixel area; each color conversion layer is used for converting light emitted by the light source array through a color gamut to obtain light of a color corresponding to the sub-pixel area, and the specular reflection layer is used for reflecting natural light to perform specular display. Compared with the prior art, this display device is owing to set up specular reflection layer and look conversion layer each other in turn, can realize reflection zone and display area mutual independence, make reflection zone need not compatible reflection and printing opacity function simultaneously, realize reflecting the natural light completely, the specular reflection effect has been improved, and through setting up look conversion architecture, can be comprehensively effective convert the light that the light source array sent into the light that the sub-pixel district of place corresponds the colour, the poor problem of contrast that reverberation and display light mixed light caused has been avoided, thereby to a great extent reflection and display effect have been improved.
Optionally, as shown in fig. 2, the color conversion structure 20 further includes a plurality of mutually independent color filter layers 203, each color conversion layer 202 is connected to a corresponding color filter layer 203, the color filter layer 203 is located on a side of the layer where the color conversion layer 202 is located, the side being away from the light source array 10, and the color filter layer 203 is configured to filter the residual light that is not subjected to color gamut conversion and has a color corresponding to the sub-pixel area where the color conversion layer is located, so as to perform image display.
The color filter layer 203 may be a color filter, which is an optical filter and can precisely select a light wave with a small range of bands to be passed through, and filter out other bands not desired to be passed through, that is, the color gamut is converted into the residual light with the corresponding color of the sub-pixel region to be filtered out, so as to generate three colors of red, green and blue by using the filtering principle, and the three colors are mixed according to different types to generate various colors according to different control voltages of the driving IC, thereby realizing the display of rich and colorful pictures.
When the color conversion layer is a red conversion layer R-QD, the corresponding color filter layer is a red filter layer R-CF; when the color conversion layer is green conversion G-QD, the corresponding color filter layer is a green filter layer G-CF; when the color conversion layer is blue conversion B-QD, the corresponding color filter layer is a green filter layer B-CF.
In this embodiment, the color filter layer and the corresponding color conversion layer may be connected by adhesion, for example, by optical glue. The thickness of the film layer of the color filter layer can be any thickness between 1nm and 10 um.
Optionally, referring to fig. 3, the color conversion structure 20 further includes a black matrix layer 204 and a light-shielding layer 205, the light-shielding layer 205 is located on a side of the layer where the specular reflection layer 201 is located, which is close to the light source array 10, and the black matrix layer 204 is respectively connected to the specular reflection layer 201 and the light-shielding layer 205 and is disposed between the specular reflection layer 201 and the light-shielding layer 205; the black matrix layer 204 and each color filter layer 203 are alternately provided, and the light-shielding layer 205 and each color conversion layer 202 are alternately provided; the black matrix layer 204 is used for shielding light and preventing crosstalk of light irradiated between the color filter layers; the light-shielding layer 205 is for shielding light and preventing crosstalk of light applied to each color conversion layer.
Specifically, the material of the black matrix layer 204 may be a black organic material, such as Cr, CrOx, black resin, or the like. The thickness of the black matrix layer 204 may be any thickness between 1nm and 10 um.
In the embodiment, the black matrix layers are alternately arranged on the color filter layers around each sub-pixel region, so that each sub-pixel can be divided, and light emitted from the color filter layers is absorbed, thereby reducing optical crosstalk among pixels, improving the resolution and contrast of a display picture, and further improving the display quality.
The light-shielding layer 205 is also called a bank layer, and the material thereof may be any gray organic material, and the thickness of the light-shielding layer may be any thickness between 1nm and 10 um. The film thickness of the light-shielding layer 205 may be greater than that of the black matrix layer 204.
Optionally, the black matrix layer, also called bm (black matrix), may be connected to the specular reflection layer and the light-shielding layer by adhesion, for example, by using a photoresist.
The height of the color filter layer 203 is greater than the height of the black matrix layer 204, and the height of the color conversion layer 202 is greater than the height of the light-shielding layer 205. The height above which it is made may for example be any height between 0 and 10 micrometers,
it should be noted that, because the height of the film layer of the color conversion layer is greater than the height of the film layer of the light shielding layer, the quantum dots in the color conversion layer can completely absorb and convert the light emitted by the light source array, and the height of the film layer of the color filter layer is greater than the height of the film layer of the black matrix layer, so that the light which is not converted by the color gamut is completely filtered, and the utilization rate of the light is further improved, thereby greatly improving the display effect of the light.
In the embodiment, the shading layers are alternately arranged around the color conversion layers of the sub-pixel regions, so that the sub-pixels can be divided, and light emitted from the color conversion layers is absorbed, thereby reducing optical crosstalk among the pixels, improving the resolution and contrast of a display picture, and further improving the display quality.
Optionally, referring to fig. 4, the color conversion structure further includes a first driving back plate 206, where the first driving back plate 206 is located on a side of the layer where the specular reflection layer 201 and the color conversion layer 202 are located, away from the light source array 10.
Specifically, the first driving backplate may be a passive driving backplate or an active driving backplate, and the first driving backplate may be made of a Printed Circuit Board (PCB), a glass material, or a flexible Polyimide (PI).
It should be noted that the printed circuit board may be a flexible circuit board, and the flexible circuit board is a high-strength, reliable and excellent flexible printed circuit board supported by a polyimide or polyester film as a base material, and may include a rigid member formed of an aluminum material or stainless steel. Polyimide is a high molecular polymer having an imide structure in the main chain of the molecular structure.
The first driving back plate 206 can be connected to the specular reflection layer 201 and the color conversion layer 202 by bonding, for example, by using photoresist.
Optionally, the light source array includes a second driving backplane 101 and a light source chip 102 connected to the second driving backplane 101. The light source chip 102 is used for emitting light and irradiating to the color conversion structure 20.
The light source chip may be a small-pitch LED chip, a Mini LED chip, a Micro LED chip, or an LED package.
The LED chip is a solid-state semiconductor device, and is a semiconductor wafer, which mainly converts electrical energy into optical energy. The LED chip may be formed of materials such as phosphide-gallium (GaP), gallium-aluminum-arsenic (GaAlAs) or arsenide-gallium (GaAs), nitride-gallium-GaN), and the inner structure thereof has one-way conductivity. The bonding pads of the chip are typically gold pads or aluminum pads. The shape of the welding pad is round, square, cross, etc. The LED chip is classified into a surface light emitting type (light is mostly emitted from the surface of the chip) and a five-sided light emitting type (light is emitted from the surface and the side surfaces of the chip) according to the light emitting portion.
The second driving backplate may be a passive driving backplate or an active driving backplate, and the second driving backplate may be made of a Printed Circuit Board (PCB), a glass material, or a flexible Polyimide (PI).
Optionally, the LED chip may be a blue LED chip, or an ultraviolet LED chip. Optionally, when the LED chip is a blue LED chip, the LED chip can emit blue light to irradiate the color conversion structure, so that the color conversion structure converts the emitted blue light into light of a color corresponding to the sub-pixel region through the color conversion layer, that is, red light, green light, and blue light.
It should be noted that, when the LED chip is an ultraviolet LED chip, it can emit ultraviolet light to irradiate the color conversion structure, at this time, an additional color conversion layer needs to be added to perform color gamut conversion on the ultraviolet light to obtain blue light, and then the color conversion layer in the color conversion structure performs color gamut conversion on the blue light to obtain light with a color corresponding to the sub-pixel region where the blue light is located, so that the light can be finally converted into red light, green light, and blue light.
Optionally, the light source array 10 may further include a filling layer 103, and the material of the filling layer may be, for example, a gray, white or black organic material. The light source chips arranged at intervals are fixed through the filling layer, so that the light source chips are prevented from loosening, and the light emitting efficiency is improved.
Optionally, as shown in fig. 5, the display device further includes an encapsulation layer 30, and the light source array 10 is connected to the color conversion structure 20 through the encapsulation layer 30.
The encapsulation layer may include a sealant and a peripheral frame, and in this embodiment, the sealant is filled between the light source array and the color conversion structure, so that the light source array and the color conversion structure are closely attached to each other and fixed by the peripheral frame, and water and oxygen can be blocked, thereby preventing the quantum dot material or the light source chip in the color conversion layer from emitting light and quenching due to the water and oxygen.
Referring to fig. 6, fig. 6 is a schematic top view of a display device according to an embodiment of the present disclosure, the display device includes a reflective area and a display area, the display area includes RGB pixel units, the reflective area includes a specular reflection layer, since a high-reflectivity metal is plated on the first driving backplane, light can be reflected to realize a specular reflection function, and in the display area, the driving system drives the light source chip to emit light, so that the color conversion layer excites the quantum dot material of the corresponding sub-pixel area to emit light, thereby displaying a picture.
Furthermore, during the use of the display device, when performing image display, the driving system may be used to drive the light source chip in the light source array to emit light, for example, when the light source chip is a blue LED chip, the blue LED chip emits blue light, and the emitted light is irradiated to the color conversion structure located on the light emitting side of the light source array, the color conversion structure performs color gamut conversion on the light emitted from the light source chip to light of a color corresponding to the sub-pixel region through the color conversion layers which are independent of each other, that is, performs color gamut conversion on the light emitted from the light source chip through the red conversion layers R-QD, the green conversion layers G-QD, and the blue conversion layers B-QD, so as to obtain red light of a color corresponding to the red sub-pixel region, green light of a color corresponding to the green sub-pixel region and blue light of a color corresponding to the blue sub-pixel region, the light emitted from the light source chip is shielded by the bank layer and crosstalk of the light source chip is prevented from being irradiated to the color conversion layers, and residual light which is not subjected to color gamut conversion and is treated by the red conversion layer R-QD, the green conversion layer G-QD and the blue conversion layer B-QD is filtered by the red filter layer R-CF, the green filter layer G-CF and the blue filter layer B-CF respectively, and the residual light which is not filtered is shielded by the black matrix layer BM layer and crosstalk of light irradiating among the color filter layers is prevented, so that red light, green light and blue light are mixed according to a certain proportion and strength, and various colorful pictures are obtained.
When the display device performs mirror display, the display device can emit natural light to the mirror reflection layer in the color conversion structure for reflecting the natural light to perform mirror display, so that the mirror reflection function is realized through the reflected light.
The wavelengths corresponding to the three primary colors of red, green, and blue are 700nm,546.1nm, and 435.8nm, respectively. The three primary colors of light can present various light colors by mixing according to a certain proportion. The liquid crystal screen is composed of the red, green and blue light-emitting color small pixel points. The three primary colors are mixed according to different proportions and intensities, so that full-color picture display is realized, and the picture display can be in different forms such as characters, patterns or images.
Among them, full color display includes but is not limited to red, green and blue RGB tricolor light schemes. For example, a four primary color scheme of cyan, magenta, yellow, and black CMYK is also possible.
Optionally, the above mixing manner according to different proportions and intensities may be to add and subtract colors according to needs, where red plus blue plus green is equal to white, red plus green is equal to yellow, red plus blue is equal to violet, and blue plus green is equal to cyan, and more colors may be generated due to different mixing proportions.
The display device that this embodiment provided is through setting up look conversion structure and light source array, compare the LCD among the prior art and have luminance height, the colour gamut is wide, the fast advantage of response speed, and specular reflection layer sets up with a plurality of mutually independent colour conversion layers are alternative, can realize reflection zone and display area mutual independence, therefore, reflection zone need not compatible reflection and printing opacity effect, can make the specular reflection layer into opaque complete reflection environment natural light form, thereby realize better specular reflection effect completely, and the display area passes through the light source chip and combines the colour conversion layer, can realize higher luminance and colour gamut, the problem that the contrast that reverberation and display light mix the light to cause is poor has been avoided, thereby to a great extent has improved reflection and display effect.
On the other hand, an embodiment of the present application provides a method for manufacturing a display device, and fig. 7 is a schematic flowchart of the method for manufacturing a display device provided in the embodiment of the present application, and as shown in fig. 7, the method includes:
s101, providing a first driving back plate, and forming a color conversion structure on the first driving back plate; the color conversion structure comprises a plurality of mutually independent color conversion layers which are alternately arranged by a specular reflection layer and a specular reflection layer, each color conversion layer corresponds to each sub-pixel region one by one, and the specular reflection layer is used for reflecting natural light to perform mirror display; each color conversion layer is used for converting the color gamut of the light emitted by the light source array into the light of the color corresponding to the sub-pixel area.
Specifically, a first driving backplane may be obtained, a specular reflection layer is deposited on the first driving backplane at intervals according to sub-pixel intervals, a Black Matrix (BM) layer is formed on the specular reflection layer by a yellow light process, a black matrix layer is formed on the specular reflection layer by a yellow light process, a plurality of Color Filter (CF) layers are formed at intervals on the specular reflection layer by the yellow light process, the color filter layers have a height greater than that of the black matrix layer, a light blocking (bank) layer is formed on the Black Matrix (BM) layer by the yellow light process, and a corresponding color conversion (QD) layer is deposited on each Color Filter (CF) layer to obtain a color conversion structure, wherein the color conversion layer has a height greater than that of the light blocking layer.
Referring to fig. 8, after the first driving backplate 206 is obtained, the specular reflection layer 201 may be deposited on the first driving backplate 206 at predetermined sub-pixel intervals by Physical Vapor Deposition (PVD). The preset sub-pixel region interval is the distance between the corresponding sub-pixel regions when the sub-pixels are subjected to reasonable and clear imaging determined in advance according to actual requirements.
The physical vapor deposition method is to form a mirror reflection layer by physically vaporizing the surface of the metal material into gaseous atoms or molecules or partially ionizing the gaseous atoms or molecules into ions under vacuum, and depositing a thin film of the metal material on the surface of the first driving back plate through a low-pressure gas (or plasma) process. Optionally, the metal material may be silver or aluminum, and the deposition thickness may be 1nm to 10 um.
The physical vapor deposition may include vacuum evaporation, sputtering, arc plasma deposition, ion plating, molecular beam epitaxy, etc. The vacuum evaporation can adopt corresponding vacuum coating equipment, and the vacuum coating equipment can comprise a vacuum evaporation coating machine, a vacuum sputtering coating machine and a vacuum ion coating machine.
Referring to fig. 9, after the specular reflection layer 201 is deposited on the first driving backplane 206, a Black Matrix (BM) layer 204 may be deposited on the specular reflection layer 201 by using a photolithography process, and a plurality of Color Filter (CF) layers 203 may be deposited at intervals on the specular reflection layer by using a photolithography process, the plurality of Color Filter (CF) layers may include a red filter layer R-CF, a green filter layer G-CF, and a blue filter layer B-CF, the red filter layer R-CF, the green filter layer G-CF, and the blue filter layer B-CF have the same film height, and a light blocking (bank) layer 205 may be deposited on the Black Matrix (BM) layer 204 by using a photolithography process, the film thickness of the light blocking (bank) layer may be greater than that of the Black Matrix (BM) layer, and then a corresponding color conversion (QD) layer 202 may be deposited on each of the Color Filter (CF) layers 203, the red conversion layer R-QD is deposited on the red filter layer R-CF, the green conversion layer G-QD is deposited on the green filter layer G-CF, and the blue conversion layer B-QD is deposited on the blue filter layer B-CF, wherein the film thicknesses of the red conversion layer R-QD, the green conversion layer G-QD and the blue conversion layer B-QD are the same, and the height of each color conversion layer 202 is greater than that of the light shielding layer 205, so that the color conversion structure is obtained.
It should be noted that, as shown in fig. 10, the yellow light process may include steps of glue coating (for example, Spin coating), Soft baking (Soft cake), Exposure and Development (Exposure), hard baking (Post Exposure cake), and Development. The display device can adopt a yellow light process to realize deposition operation when depositing a Black Matrix (BM) layer, a red filter layer R-CF, a green filter layer G-CF, a blue filter layer B-CF, a shading (bank) layer, a red conversion layer R-QD, a green conversion layer G-QD and a blue conversion layer B-QD. Optionally, the thickness of each film layer may be 1nm to 10 um.
And S102, providing a second driving back plate, and forming a light source array on the second driving back plate.
Specifically, the second driving back plate and the light source chip may be obtained, the light source chip may be an LED chip, and the light source chip may be attached to the second driving back plate by means of photoresist bonding.
And S103, carrying out group bonding treatment on the light emitting side of the light source array and the color conversion structure to form a display device, wherein the display device comprises a plurality of mutually independent sub-pixel regions.
Specifically, as shown in fig. 11, after the color conversion structure is obtained, the color conversion structure (QDCF) obtained above may be sequentially cleaned (Cleaning), Pre-processed (Pre-processing), and area distribution (Dam Dispensing) to obtain a processed structure, and frame glue (filling Dispensing) is coated on the processed structure, and then the light source array is bonded to the processed structure in a pair by the frame glue, and Lamination (Lamination) and light Curing (UV Curing) are performed by a film coating process to obtain the display device.
When the color conversion structure is cleaned, the color conversion structure may be subjected to air blowing treatment and then subjected to pretreatment, whether the color conversion structure can normally perform color gamut conversion on light is detected, for example, whether the color conversion structure can emit red light, green light and blue light is checked, then region distribution treatment is performed to obtain a treated structure, a frame adhesive, which may be polypropylene, is uniformly coated on the treated structure, and then a laminating treatment and a photocuring treatment are performed on the light source array and the treated structure by using a film coating process to obtain the display device.
In the lamination, materials having different functions are bonded together by an adhesive lamination method to form a composite having multiple functions. In this embodiment, the processed structure and the light source array are combined through a lamination process.
The photo-curing process may be an Ultraviolet (UV) curing process, wherein the UV curing process is a "radiation hardening technique" that irradiates a chemical with UV light so that a "photo initiator" of scale contained in the chemical is stimulated by a UV light source to cause glue hardening of a "polymerization monomer" contained in the chemical in a very short time (less than 1 second). In this example, the laminated structure was irradiated with UV light and cured to obtain a display device.
In this embodiment, the color conversion structure is attached to the second driving backplane by way of area allocation and dispensing encapsulation, and high-precision attaching equipment is used for attachment, so that the light source chips correspond to the color conversion layers one to one, and the light emitted by the light source chips is irradiated onto the color conversion layers.
Optionally, as shown in fig. 12, the display device further includes a microprocessor 201 and a memory 202, wherein the microprocessor 201 may include one or more processing cores, such as a 4-core microprocessor, an 8-core microprocessor, and the like. The microprocessor 201 may be implemented in at least one hardware form of Digital Signal Processing (DSP), Field Programmable Gate Array (FPGA), and Programmable Logic Array (PLA).
The microprocessor 201 may also include a main processor, which is a processor for Processing data in an awake state and is also called a Central Processing Unit (CPU), and a coprocessor, which is a low power processor for Processing data in a standby state.
In addition, the microprocessor 201 may be integrated with a Graphics Processing Unit (GPU) for rendering and drawing the contents to be displayed on the display screen, and in some embodiments, the microprocessor 201 may further include an Artificial Intelligence (AI) processor for Processing the computing operations related to machine learning.
In some embodiments, the display apparatus may further include a peripheral interface 203 and at least one peripheral. The microprocessor 201, memory 202 and peripheral interface 203 may be connected by bus or signal lines. Each peripheral may be connected to the peripheral interface 203 by a bus, signal line, or circuit board.
In particular, the peripheral devices include, but are not limited to, radio frequency circuitry 204, sensors 205, and power source 206. The peripheral interface 203 may be used to connect at least one peripheral related to Input/Output (I/O) to the microprocessor 201 and the memory 202. In some embodiments, the microprocessor 201, memory 202, and peripheral interface 203 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the microprocessor 201, the memory 202 and the peripheral interface 203 may be implemented on a single chip or circuit board, which is not limited in this application.
The Radio Frequency circuit 204 is used for receiving and transmitting Radio Frequency (RF) signals, also called electromagnetic signals. The radio frequency circuitry 204 communicates with communication networks and other communication devices via electromagnetic signals. The rf circuit 204 converts the electrical signal into an electromagnetic signal for transmission, or converts the received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuitry 204 includes an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and the like. The radio frequency circuitry 204 may communicate with other devices via at least one wireless communication protocol. The Wireless communication protocol includes, but is not limited to, a metropolitan area network, various generations of mobile communication networks (2G, 3G, 4G, and 5G), a Wireless local area network, and/or a Wireless Fidelity (WiFi) network. In some embodiments, radio frequency circuitry 204 may also include Near Field Communication (NFC) related circuitry.
The sensors 205 include one or more sensors for providing various aspects of status assessment for the display device. Wherein the sensor 205 comprises an acceleration sensor. For example, the sensor 205 may detect an open/close state of the electronic apparatus 200, and may also detect a change in the position of the electronic apparatus 200, the presence or absence of contact with the electronic apparatus 200, orientation or acceleration/deceleration of the electronic apparatus 200, and a change in the temperature of the display device. The sensor 205 may also include an optical sensor, such as a Complementary Metal Oxide Semiconductor (CMOS) or Charge-coupled Device (CCD) photosensitive imaging element, for use in imaging applications. In some embodiments, the sensor 205 may also include a pressure sensor, a hall sensor, a proximity sensor, a gyroscope sensor, and a magnetic sensor.
Those skilled in the art will appreciate that the configuration shown in fig. 12 is not intended to be limiting of the display device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components may be used.
It should be noted that the display device according to the embodiments of the present disclosure may include, but is not limited to, a liquid crystal panel, electronic paper, an LED panel, a smart phone, a Tablet Computer (Tablet Computer), a television, a display, a notebook Computer, a digital camera, a smart wearable device, a navigator and other products or components having a display function.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. A display device is characterized by comprising a plurality of mutually independent sub-pixel areas, a light source array and a color conversion structure positioned on the light emitting side of the light source array, wherein the color conversion structure comprises a plurality of mutually independent color conversion layers which are alternately arranged by a specular reflection layer and a specular reflection layer, and each color conversion layer corresponds to each sub-pixel area one to one;
the light emitted by the light source array irradiates each sub-pixel area; each color conversion layer is used for converting the light emitted by the light source array through a color gamut to obtain the light of the color corresponding to the sub-pixel area, so as to display a picture; the mirror reflection layer is used for reflecting natural light to perform mirror display.
2. The display device according to claim 1, wherein the color conversion structure further comprises a plurality of independent color filter layers, each color conversion layer is connected to a corresponding color filter layer, the color filter layers are located on a side of the layer where the color conversion layer is located away from the light source array, and the color filter layers are used for filtering residual light which is not subjected to color gamut conversion and has a color corresponding to the sub-pixel area where the color conversion layer is located, so as to perform image display.
3. The display device according to claim 2, wherein the color conversion structure further comprises a black matrix layer and a light-shielding layer, the light-shielding layer is located on a side of the layer where the specular reflection layer is located, the side being close to the light source array, and the black matrix layer is connected to the specular reflection layer and the light-shielding layer and disposed between the specular reflection layer and the light-shielding layer; the black matrix layer and each color filter layer are alternately arranged, and the shading layer and each color conversion layer are alternately arranged;
the black matrix layer is used for shading light and preventing crosstalk of light irradiated between the color filter layers; the light-shielding layer is used for shielding light and preventing crosstalk of light irradiated between the conversion layers of the various colors.
4. The display device according to claim 3, wherein a height of the color filter layer is larger than a height of the black matrix layer, and wherein a height of the color conversion layer is larger than a height of the light-shielding layer.
5. The display device of claim 1, wherein the color conversion structure further comprises a first driving backplane located on a side of the layer on which the specular reflection layer and the color conversion layer are located facing away from the array of light sources.
6. The display device according to claim 1, wherein the light source array comprises a second driving back plate and a light source chip connected to the second driving back plate, and the light source chip is configured to emit light and irradiate the color conversion structure.
7. The display device of claim 1, further comprising an encapsulation layer through which the array of light sources is interconnected with the color conversion structure.
8. A method of fabricating a display device, the method comprising:
providing a first driving back plate, and forming a color conversion structure on the first driving back plate; the color conversion structure comprises a specular reflection layer and a plurality of mutually independent color conversion layers which are alternately arranged on the specular reflection layer, each color conversion layer corresponds to each sub-pixel region one by one, and the specular reflection layer is used for reflecting natural light to perform specular display; each color conversion layer is used for converting the light emitted by the light source array through a color gamut to obtain the light of the color corresponding to the sub-pixel area, so as to display a picture;
providing a second driving backboard, and forming a light source array on the second driving backboard;
and the light emitting side of the light source array and the color conversion structure are subjected to group combination treatment to form a display device, and the display device comprises a plurality of mutually independent sub-pixel regions.
9. The method of claim 8, wherein forming a color conversion structure on the first driven backplane comprises:
depositing mirror reflection layers on the first driving back plate at intervals according to preset sub-pixel intervals;
forming a black matrix layer on the specular reflection layer by adopting a yellow light process;
forming a plurality of color filter layers at intervals on the mirror reflection layer by adopting a yellow light process, wherein the height of each color filter layer is greater than that of the black matrix layer;
forming a light shielding layer on the black matrix layer by adopting a yellow light process;
and depositing a corresponding color conversion layer on each color filter layer to obtain a color conversion structure, wherein the height of the color conversion layer is greater than that of the shading layer.
10. The method of claim 8 or 9, wherein performing a pair-bonding process on the light-emitting side of the light source array and the color conversion structure to form a display device comprises:
sequentially cleaning, preprocessing and region distribution processing the color conversion structure to obtain a processed structure;
coating frame glue on the processed structure;
and carrying out assembly and lamination treatment and photocuring treatment on the light source array through the frame glue and the treated structure by adopting a film coating process to obtain the display device.
Priority Applications (2)
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| CN202210851898.8A CN115061309A (en) | 2022-07-19 | 2022-07-19 | Display device and manufacturing method thereof |
| PCT/CN2022/117248 WO2024016441A1 (en) | 2022-07-19 | 2022-09-06 | Display apparatus and manufacturing method therefor |
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| CN202210851898.8A CN115061309A (en) | 2022-07-19 | 2022-07-19 | Display device and manufacturing method thereof |
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