CN110928036A - Display device and display method and preparation method thereof - Google Patents

Display device and display method and preparation method thereof Download PDF

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Publication number
CN110928036A
CN110928036A CN201911354951.8A CN201911354951A CN110928036A CN 110928036 A CN110928036 A CN 110928036A CN 201911354951 A CN201911354951 A CN 201911354951A CN 110928036 A CN110928036 A CN 110928036A
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China
Prior art keywords
display panel
substrate
display
light
display device
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Pending
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CN201911354951.8A
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Chinese (zh)
Inventor
许明吉
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Xiamen Tianma Microelectronics Co Ltd
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Xiamen Tianma Microelectronics Co Ltd
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Priority to CN201911354951.8A priority Critical patent/CN110928036A/en
Publication of CN110928036A publication Critical patent/CN110928036A/en
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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
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
    • 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
    • G02F1/133528—Polarisers
    • 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
    • G02F1/133528—Polarisers
    • G02F1/133536—Reflective polarizers
    • 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
    • G02F1/1336—Illuminating devices
    • 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
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • 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
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells

Abstract

The invention discloses a display device and a display method and a preparation method thereof, belonging to the technical field of display. The diffusion optical cement is attached to the first display panel and the second display panel, the double-layer panels can be fixedly attached through the optical cement, and the surface connection has higher strength. And diffusing the diffusing particles in the optical cement can also reduce the generation of optical interference fringes. The display method is used for the display device. The preparation method is used for preparing the display device. The invention combines the optical cement and the diffusion sheet in the prior art into a whole, thereby being beneficial to thinning the device, improving the contrast of a display picture, simultaneously improving the penetration rate of the display device and being beneficial to improving the display effect and the display quality.

Description

Display device and display method and preparation method thereof
Technical Field
The invention relates to the technical field of display, in particular to a display device and a display method and a preparation method thereof.
Background
With the development of liquid crystal display technology, liquid crystal display modules have been widely used in liquid crystal display devices such as mobile phones and tablet computers. However, since the lcd panel of the lcd device does not have the function of emitting light, a backlight module is required to be disposed below the lcd panel to provide the required light source, so as to achieve the display effect. In recent years, liquid crystal display panels have been introduced into almost every information processing apparatus, small apparatuses such as mobile phones, Personal Digital Assistants (PDAs), and Portable Multimedia Players (PMPs), medium and large-sized apparatuses for monitors and TVs.
From the trend of technology development, how to reduce the power consumption of the backlight is most concerned. Because the backlight source is the largest energy consumer, the power consumption of the backlight is reduced, and the power consumption of the whole machine is also greatly reduced. The technologies include improvement of a driving circuit of a backlight, improvement of Light-Emitting efficiency of an LED (Light-Emitting Diode), and development of new LED types. At present, Local Dimming (Local backlight adjustment) uses a backlight composed of hundreds of LEDs to replace a cold cathode backlight, the backlight LEDs can be adjusted according to the brightness of an image, the brightness of a highlight part in a display screen image can be maximized, and meanwhile, the brightness of a dark part can be reduced or even turned off, so as to achieve the optimal contrast. Thus, the reduction in the brightness of the dark area reduces the power consumption of the backlight. Especially, the direct type LED backlight is matched with the Local Dimming technology, so that the electric quantity can be greatly reduced, the contrast ratio and the gray scale number of a display picture can be improved, the ghost shadow can be reduced, and the like. And the conventional display device including the liquid crystal display panel has a limitation in enhancing the contrast ratio, which is required to be higher as the display device becomes larger in size, and the conventional display device in the related art uses a polarizing plate or a functional film to improve the contrast ratio. However, the contrast ratio according to the conventional method and structure depends on the characteristics of the polarizing plate or the functional film, and the arrangement of the polarizing plate or the functional film increases the product cost.
Therefore, it is an urgent need to provide a display device, a display method thereof, and a manufacturing method thereof, which can improve the contrast of a display screen and improve the display effect.
Disclosure of Invention
In view of this, the invention provides a display device, a display method thereof and a manufacturing method thereof, so as to solve the problems of low contrast and unsatisfactory display effect of the display device in the prior art.
The present invention provides a display device including: the display device comprises a first display panel and a second display panel, wherein the first display panel comprises a first substrate, a second substrate and a first display function layer, the first substrate and the second substrate are oppositely arranged, the first display function layer is arranged between the first substrate and the second substrate, and the second substrate is positioned on one side, close to a light-emitting surface of the display device, of the first substrate; the second display panel is positioned on one side of the light-emitting surface of the first display panel and comprises a third substrate, a fourth substrate and a second display function layer, wherein the third substrate and the fourth substrate are oppositely arranged, the second display function layer is arranged between the third substrate and the fourth substrate, the fourth substrate is positioned on one side of the third substrate, which is far away from the first display panel, and the fourth substrate or the third substrate comprises a color resistance layer; and the diffusion optical cement is prepared by doping diffusion particles in the optical cement.
Based on the same inventive concept, the invention also provides a display method of the display device, and the display device comprises: the backlight module comprises a plurality of light-emitting units which are arranged in an array; the first display panel is positioned on one side of the light-emitting surface of the backlight module and comprises a first substrate, a second substrate and a first display function layer, wherein the first substrate and the second substrate are arranged oppositely, the first display function layer is arranged between the first substrate and the second substrate, the second substrate is positioned on one side of the first substrate, which is far away from the backlight module, and the first display panel realizes black-and-white display; the first display panel comprises a plurality of first pixels arranged in an array; the second display panel is positioned on one side of the light-emitting surface of the first display panel and comprises a third substrate, a fourth substrate and a second display function layer, wherein the third substrate and the fourth substrate are oppositely arranged, the second display function layer is arranged between the third substrate and the fourth substrate, the fourth substrate is positioned on one side of the third substrate, which is far away from the first display panel, and the fourth substrate or the third substrate comprises a color resistance layer; the second display panel comprises a plurality of second pixels arranged in an array; diffusion optical cement between the first display panel and the second display panel, wherein the diffusion optical cement is prepared by doping diffusion particles in the optical cement; the display device also comprises a first driving circuit, a second driving circuit and a third driving circuit, wherein the first driving circuit is electrically connected with the backlight module, the second driving circuit is electrically connected with the first display panel, and the third driving circuit is electrically connected with the second display panel; the backlight module comprises a plurality of light emitting areas, each light emitting area comprises a plurality of light emitting units, and the light emitting areas at least comprise a first light emitting area and a second light emitting area; the first display panel comprises a first pixel region corresponding to the first light-emitting region and a second pixel region corresponding to the second light-emitting region; the second display panel comprises a third pixel region corresponding to the first light-emitting region and a fourth pixel region corresponding to the second light-emitting region; the display method comprises the following steps: the driving signal of the first driving circuit controls the brightness of different light emitting areas of the backlight module; the brightness of the first light-emitting area is A, the brightness of the second light-emitting area is B, the brightness difference value of the first light-emitting area and the second light-emitting area is C, and C is equal to A-B; light emitted by the backlight module is emitted to the first display panel, a driving signal of the second driving circuit controls a first pixel in a first pixel area of the first display panel to be in a bright state, a first pixel in a second pixel area to be in a dark state, at the moment, the brightness of the first pixel area is A ', the brightness of the second pixel area is B', the brightness difference value between the first pixel area and the second pixel area is C ', and C' is A '-B'; wherein, A ' ═ A, B ' < B, then C ' > C; light emitted by the first display panel is emitted to the second display panel, a driving signal of the third driving circuit controls a second pixel in a third pixel area and a second pixel in a fourth pixel area of the second display panel to be in a dark state or a bright state respectively, and the light passes through a color resistance layer of the second display panel to display color images with different brightness; at this time, the luminance of the third pixel region is a ", the luminance of the fourth pixel region is B", the luminance difference between the third pixel region and the fourth pixel region is C ", and C" — "B" ═ C', then C "> C.
Based on the same inventive concept, the invention also provides a preparation method of the display device, which comprises the following steps: providing a first display panel; preparing diffusion optical cement, doping diffusion particles in the optical cement, and mixing the diffusion particles with the optical cement; enabling the diffusion optical cement to be in a semi-solidified state through drying equipment; cutting the semi-cured diffusion optical adhesive into a plurality of sub-diffusion optical adhesives with the same size as the first display panel through a coiling and cutting process; attaching the sub-diffusion optical adhesive to one side of the light-emitting surface of the first display panel; providing a second display panel; and attaching the second display panel to one side of the sub-diffusion optical cement far away from the first display panel.
Compared with the prior art, the display device, the display method and the preparation method thereof provided by the invention at least realize the following beneficial effects:
in the display device provided by the invention, the diffusion optical cement is arranged between the first display panel and the second display panel, wherein the diffusion optical cement is a novel material and is prepared by doping diffusion particles in the optical cement. The diffusion optical cement is attached to the first display panel and the second display panel, the double-layer panels can be fixedly attached through the optical cement, and the surface connection has higher strength. And the diffusion particles in the diffusion optical adhesive can also reduce the generation of optical interference fringes, and the diffusion particles can atomize the light emitted from the light-emitting surface of the first display panel, so that the optical interference fringes between the first display panel and the second display panel can be reduced. Because the arrangement of the original diffusion sheet is reduced, the optical glue and the diffusion sheet in the prior art are combined into a whole, and the thinning of the device is further facilitated. Adopt diffusion optical cement to laminate fixedly between first display panel and the second display panel, the problem that the air bed that can also avoid air bonding technique to bring influences the penetration rate to be favorable to promoting display device's penetration rate, be favorable to improving the display quality. Therefore, the display device provided by the invention can improve the contrast of a display picture, avoid the generation of optical interference fringes in a double-layer display panel, and simultaneously improve the penetration rate of the display device, thereby being beneficial to improving the display effect and the display quality.
Of course, it is not necessary for any product in which the present invention is practiced to specifically achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic plan view of a display device according to an embodiment of the present invention;
FIG. 2 is a schematic sectional view taken along line A-A' of FIG. 1;
FIG. 3 is an enlarged view of a portion of region C of FIG. 2;
FIG. 4 is a schematic view of the structure of FIG. 1 taken along line A-A' in another cross-section;
FIG. 5 is a schematic illustration of the disassembled structure of FIG. 1;
FIG. 6 is a schematic diagram of a display principle structure of the first display panel of the present embodiment;
FIG. 7 is a schematic view of another split structure of FIG. 1;
FIG. 8 is a schematic flow chart illustrating a method for fabricating a display device according to an embodiment of the present invention;
fig. 9 is a schematic flow chart of another method for manufacturing a display device according to an embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic plan view of a display device according to an embodiment of the present invention, fig. 2 is a schematic sectional view taken along a direction a-a' in fig. 1, and a display device 000 according to the present embodiment at least includes: the display panel comprises a first display panel 10 and a second display panel 20 which are oppositely arranged, wherein the second display panel 20 is positioned on one side of a light emitting surface E1 of the first display panel 10;
the first display panel 10 includes a first substrate 101, a second substrate 102 disposed oppositely, and a first display function layer 103 disposed between the first substrate 101 and the second substrate 102, wherein the first substrate 101 is located on a side of the second substrate 102 away from the second display panel 20;
the second display panel 20 includes a third substrate 201, a fourth substrate 202 and a second display function layer 203 disposed between the third substrate 201 and the fourth substrate 202, the fourth substrate 202 is disposed on a side of the third substrate 201 away from the first display panel 10, and the fourth substrate 202 or the third substrate 201 includes a color-resist layer 204; optionally, the third substrate 201 may be an array substrate, and the fourth substrate 202 may be a color filter substrate; in fig. 2, the fourth substrate 202 is taken as a color filter substrate and includes a color resist layer 204 for illustration;
and a diffusion optical paste 30 between the first display panel 10 and the second display panel 20, the diffusion optical paste 30 being made by doping diffusion particles 302 in an optical paste 301.
Specifically, the display device 000 of the present embodiment is composed of two-layer display panels, and the effect of improving contrast can be achieved by performing brightness control on the first display panel 10 (called Sub-panel layer, Sub-Cell) and fine control on the second display panel 20 (called Main panel layer, Main Cell) in the two-layer display panels arranged in a stacked manner, but the stacked structure of the two-layer display panels of the display device 000 is easy to generate optical interference fringes, so in the related art, the generation of the optical interference fringes is reduced by additionally arranging a diffusion film (Diffuser Films) between the first display panel 10 and the second display panel 20. The addition of the diffusion film allows the first display panel 10 and the second display panel 20 to fix the dual screen only using air bonding technology. The air bonding technology is characterized in that an air layer is arranged in the middle when the panel and the panel are fixedly attached, and the purpose of the air layer is two, namely, the upper panel is prevented from deforming and contacting with the surface of the lower panel to form Newton rings when the upper panel is touched, and the upper panel and the lower panel are further adsorbed when the surface of the lower panel has water vapor; secondly, when the upper panel is pressed, the upper panel is deformed and contacts with the lower panel, which causes signal interference and causes abnormal display. For the above reasons, the height of the air layer becomes a limitation and challenge in the present design. The height of the air layer has the following effects: too high an air layer: 1. the product thickness is increased, which affects the appearance; 2. the air layer in the middle is too much, so that the moisture content is easy to accumulate, and the moisture is improved to be condensed between the double screens, thereby influencing the vision; 3. reducing the panel transmittance. Air layer too low: 1. the deformation of the upper panel causes the upper panel to contact with the lower panel to form Newton rings, thereby affecting the vision; 2. the upper panel touches the lower panel, causing display abnormality. Therefore, in the display device formed by combining the two-layer display panels, there is still room for improvement in terms of reduction of optical interference fringes and improvement of transmittance.
In order to solve the above problem, an embodiment of the present invention provides a display device 000, in which a diffusion optical paste 30 is disposed between a first display panel 10 and a second display panel 20, wherein the diffusion optical paste 30 is a novel material and is prepared by doping diffusion particles 302 in an optical paste 301. The diffusion optical cement 30 is bonded with the first display panel 10 and the second display panel 20, and the optical cement 301 can realize the fixed bonding effect of the double-layer panels, so that the surface connection has higher strength. The Optical Cement (OCA) is used for special Adhesive for cementing transparent optical elements (such as lenses and the like), has the characteristics of colorless transparency, light transmittance of over 90 percent, good cementing strength, capability of being cured at room temperature or at intermediate temperature, small curing shrinkage and the like. Its advantages are high clarity, high transparency, high adhesion, high weatherability, water resistance, high temp and ultraviolet resistance, and no yellowing, peeling and deterioration after long-term use. And the diffusion particles in the diffusion optical adhesive can also reduce the generation of optical interference fringes, and since the diffusion particles 302 can atomize the light emitted from the light emitting surface E1 of the first display panel 10, the optical interference fringes appearing between the first display panel 10 and the second display panel 20 can be reduced. Because the arrangement of the original diffusion sheet is reduced, the optical glue and the diffusion sheet in the prior art are combined into a whole, and the thinning of the device is further facilitated. The first display panel 10 and the second display panel 20 are bonded and fixed by the diffusion optical cement 30, and the problem that the air layer influences the penetration rate due to the air bonding technology can be avoided, so that the penetration rate of the display device 000 can be improved, and the display quality can be improved. Therefore, the display device 000 provided by the embodiment can improve the contrast of the display image, avoid the generation of optical interference fringes in the double-layer display panel, and simultaneously improve the penetration rate of the display device 000, thereby being beneficial to improving the display effect and the display quality.
It should be noted that, in this embodiment, the types of the first display panel 10 and the second display panel 20 are not specifically limited, and only the second display panel 20 having the color resistance layer 204 needs to be satisfied, the second display panel 20 can display a color picture, and the first display panel 10 can perform brightness control, and perform fine control on the second display panel 20, so as to achieve the effect of improving the contrast. It is understood that fig. 2 of this embodiment only schematically illustrates a main structure of the display panel, but is not limited to this structure, and includes other structures capable of implementing a panel display function, such as each insulating layer, a plurality of metal wiring layers, and the like, which can be understood according to the structure of the display panel in the related art, and details of this embodiment are not repeated. It should be further noted that, optionally, the first substrate 101, the second substrate 102, the third substrate 201, and the fourth substrate 202 of this embodiment may be flexible substrates or glass substrates, and this embodiment does not limit the materials of the substrates. The materials of the first substrate 101, the second substrate 102, the third substrate 201, and the fourth substrate 202 may be Plastic films (plastics films), such as PolyImide (PI), Polyethylene terephthalate (PET), or PolyCarbonate (PC), and the embodiment is not limited in particular.
In some optional embodiments, the haze of the diffusing optical adhesive 30 of the present embodiment may be between 40% and 95%, so that the effect of the diffusing particles can achieve better prevention of optical interference fringes from being generated, and at the same time, a better transmittance of the display device 000 can be achieved.
In some alternative embodiments, please refer to fig. 1, fig. 2 and fig. 3 in combination, fig. 3 is a partial enlarged view of the area C in fig. 2, and in this embodiment, the material of the diffusion particles 302 in the diffusion optical glue 30 may optionally include polymethyl methacrylate or nylon. The diffusion particles 302 in the diffusion optical paste 30 have a particle diameter L ranging from 0.5 to 25 μm, and the diffusion particles 302 have either or both of a spherical shape and an ellipsoidal shape.
This embodiment further explains that the material of the diffusion particles 302 in the diffusion optical glue 30 may be any one of Polymethyl methacrylate (PMMA) and nylon, and the particle size L of the diffusion particles 302 in the diffusion optical glue 30 is in the range of 0.5-25 μm, i.e. the plurality of diffusion particles 302 in the diffusion optical glue 30 may mean that the plurality of diffusion particles at least includes two or more sizes. Other organic particles such as Polycarbonate (PC) particles, Polyethylene terephthalate (PET) particles, Polystyrene (PS) particles, Polyurethane (PU) particles, etc. may be used as the diffusion particles, and inorganic particles such as ZnS particles, ZnO particles, TiO particles, etc. may be used as the diffusion particles2Particles, CaCO3Particles, CaO particles, Al2O3Particles, etc., or a mixture of an inorganic material and an organic material may also be used. The diffusion particles 302 are generally spherical or ellipsoidal particles having a particle diameter L in the range of 0.5 to 25 μm, and thus, it is possible to achieve the purpose of increasing the shielding property while eliminating newton rings and providing a diffusion function.
In some alternative embodiments, please continue to refer to fig. 1 and fig. 2, in this embodiment, the thickness D of the diffusing optical adhesive 30 is optionally in the range of 0.02mm to 0.3 mm.
The embodiment further explains that the range of the thickness D of the diffusing optical adhesive 30 may be 0.02mm-0.3mm, so that when the first display panel 10 and the second display panel 20 are fixedly attached, enough diffusing particles 302 can be doped by using enough thickness space, and the effect of the diffusing particles is better exerted, further optical interference fringes generated in the double-layer display panel are avoided, and the display device 000 is favorably improved in transmittance, and the display device can be thinned. Preferably, the thickness D of the diffusion optical paste 30 may be 0.05mm, may be 0.06mm, may be 0.1mm, may be 0.2mm, may be 0.25mm, or the like.
In some alternative embodiments, please continue to refer to fig. 1 and fig. 2, in the present embodiment, the first display panel 10 implements black and white display, and the second display panel 20 implements color display.
The embodiment further explains that the first display panel 10 is a display panel capable of realizing black and white display, the second display panel 20 is a display panel capable of realizing color display, because the first display panel 10 only needs to regulate and control the brightness by itself, the second display panel 20 is finely regulated and controlled, thereby achieving the effect of improving the contrast ratio, therefore, the first display panel 10 only needs to meet the requirement of realizing black and white display (black and white screen), and the first display panel 10 is designed into the black and white screen, and the situation that the penetration rate of the whole display device is reduced due to the fact that the first display panel 10 is designed into the color screen can be avoided.
In some alternative embodiments, please refer to fig. 1 and fig. 4 in combination, fig. 4 is a schematic cross-sectional view from a-a' to another cross-sectional view in fig. 1, in which the display device 000 further includes a backlight module 40, and the backlight module 40 is located on a side of the first display panel 10 away from the second display panel 20.
The embodiment further explains that the display device 000 is a liquid crystal display device, and since the second display panel 20 of the liquid crystal display device does not have a light emitting function, and the first display panel 10 is only used for adjusting and controlling the brightness of the first display panel, so as to realize fine adjustment and control of the second display panel 20, thereby achieving the effect of improving the contrast of the whole display device 000, the backlight module 40 needs to be arranged below the first display panel 10 to provide the required light source, and further achieving the display effect.
In some optional embodiments, please refer to fig. 1 and 4, in this embodiment, the backlight module is any one of a direct type backlight module and a side type backlight module (fig. 4 of this embodiment takes the backlight module as a side type backlight module for explaining the technical solution of this embodiment), a first polarizer 501 is disposed between the backlight module 40 and the first display panel 10, a second polarizer 502 is disposed between the first display panel 10 and the second display panel 20, and a third polarizer 503 is disposed on a side of the second display panel 20 away from the first display panel 10.
This embodiment further explains that when the display device 000 is a liquid crystal display device, the additional backlight module 40 may be a side-in type backlight module (as shown in fig. 4), a light source (not shown) of the side-in type backlight module is a single light source arranged at a side edge, and enters from the side edge of the light guide plate 401, and a plurality of optical films 402 (such as a diffusion sheet, a brightness enhancement sheet, etc.) may be further arranged at a side of the light guide plate 401 close to the first substrate 101, and the side-in type backlight module has the features of light weight, thin thickness, narrow frame and low power consumption. The backlight module 40 added to the display device 000 may also be a direct type backlight module, and the whole surface of the spontaneous light source of the direct type backlight module is placed under the light emitting surface of the backlight module 40, so that a good light emitting visual angle can be realized, the light utilization efficiency is high, and the structure is simple. The type of the backlight module 40 is not particularly limited in this embodiment, and the backlight module can be selected according to actual requirements in actual implementation. In addition, a first polarizer 501 is disposed between the backlight module 40 and the first display panel 10, a second polarizer 502 is disposed between the first display panel 10 and the second display panel 20, and a third polarizer 503 is disposed on a side of the second display panel 20 away from the first display panel 10, and the polarizers are all called polarizing plates, which can control the polarization direction of the specific light beam. In this embodiment, the first polarizer 501 is used to convert the light beam generated by the backlight module 40 into polarized light, the second polarizer 502 and the third polarizer 503 are respectively attached to the lower surface and the upper surface of the second display panel 20, the second polarizer 502 is used to convert the light beam emitted from the first display panel 10 into polarized light, and the third polarizer 503 is used to analyze the polarized light after being electrically modulated by the liquid crystal to generate light-dark contrast, so as to generate a display image on the light emitting surface E2 of the second display panel 20. It should be noted that fig. 2 of the present embodiment only schematically illustrates a part of the structure of the backlight module 40, it can be understood that the backlight module 40 may further include other structures such as a reflective sheet located on a side of the light guide plate 401 away from the first display panel 10, a housing for accommodating the light source, the light guide plate, and the optical film, and other structures such as a light shielding glue may be further included between the backlight module 40 and the first display panel, and the structure of the backlight module of the present embodiment can be understood through a side-in type backlight module or a direct type backlight module in the prior art, which is not described herein again.
In some alternative embodiments, with continued reference to fig. 1 and 4, in the present embodiment, the first polarizer 501 includes any one of a direct attached reflective polarizer or a direct attached reflective brightness enhancement film.
The embodiment further explains that the first Polarizer 501 is disposed between the backlight module 40 and the first display panel 10, and may be a Direct attached Reflective Polarizer or a Direct attached Reflective brightness enhancement sheet, wherein the Direct attached Reflective Polarizer or the Direct attached Reflective brightness enhancement sheet (DLRP) is a novel material, which not only has a DBEF (DBEF is a Reflective Polarizer, and can reuse part of the light of the whole viewing angle of the liquid crystal display panel by selectively reflecting the light of the backlight module, so that the brightness can be increased by about 60%, if the DBEF is used in combination with the brightness enhancement sheet of the backlight module, the brightness increase will have a better performance, and it can further improve the brightness, which is beneficial to saving backlight power consumption, and can also play a role of fixing the backlight module 40 and the first display panel 10, so that the Direct attached Reflective Polarizer or the Direct attached Reflective brightness enhancement sheet is used, not only can the cost be practiced thrift, fixed effect is realized, luminance is further improved, display device's transmissivity can also be further promoted.
In some optional embodiments, please refer to fig. 1, fig. 2 and fig. 5, fig. 5 is a schematic diagram of a split structure of fig. 1, in this embodiment, the backlight module 40 includes a plurality of light emitting units 400 arranged in an array, that is, the backlight module 40 includes a plurality of light emitting areas arranged in an array, and one light emitting area may be one light emitting unit 400;
the first display panel 10 includes a plurality of first pixels 100 arranged in an array, and the second display panel 20 includes a plurality of second pixels 200 arranged in an array;
in one same region M of the display device 000, the number of the light emitting units 400 is less than or equal to the number of the first pixels 100, and the number of the first pixels 100 is less than or equal to the number of the second pixels 200.
Specifically, the backlight module 40 of the present embodiment is a direct type backlight module, the backlight module 40 includes a plurality of light emitting units 400 arranged in an array, the direct type backlight module can adopt a local backlight modulation (local dimming) technology, each light emitting unit 400 can be independently lighted, and since only part of the light emitting elements of the light emitting units 400 are lighted, the power loss of the backlight plate 110 is reduced, and the brightness contrast ratio can be improved. In this embodiment, in a same area M of the display device 000, the number of the light emitting units 400 is less than or equal to the number of the first pixels 100, the number of the first pixels 100 is less than or equal to the number of the second pixels 200, the first display panel 10 is a display panel capable of implementing black-and-white display, and the second display panel 20 is a display panel capable of implementing color display, so that the first display panel 10 can implement fine control on the second display panel 20 through its own brightness control, thereby achieving the effect of improving contrast, for example, as shown in fig. 5, the backlight module 40 includes a plurality of light emitting areas M (i.e., the same area M of the display device 000), each light emitting area M includes a plurality of light emitting units 400, and the light emitting areas M includes at least a first light emitting area M1 and a second light emitting area M2; the first display panel 10 includes a first pixel region F1 corresponding to the first light emitting region M1, a second pixel region F2 corresponding to the second light emitting region M2; the second display panel 20 includes a third pixel region N1 corresponding to the first light emitting region M1, a fourth pixel region N2 corresponding to the second light emitting region M2; different light emitting zones M of the backlight module 40 emit light with different brightness by using a local dimming technology, the brightness of a first light emitting zone M1 is A, the brightness of a second light emitting zone M2 is B, the brightness difference between the first light emitting zone M1 and the second light emitting zone M2 is C, and C is A-B; the light emitted from the backlight module 40 is emitted to the first display panel 10, the first pixels 100 in the first pixel area F1 of the first display panel 10 are controlled to be in a bright state, the first pixels 100 in the second pixel area F2 are controlled to be in a dark state, and the light transmittance of different areas of the first display panel 10 can be controlled by controlling the dark state or the bright state of the first pixels 100 in different areas, so that the light intensity of the first display panel 10 can be controlled. Since the first display panel 10 only needs to adjust the transmittance of light, the first display panel 10 does not need a color filter, i.e., a color resist layer. At this time, the luminance of the first pixel region F1 is a ', the luminance of the second pixel region F2 is B ', the luminance difference between the first pixel region F1 and the second pixel region F2 is C ', and C ═ a ' -B '; wherein, A ' ═ A, B ' < B, then C ' > C; the light emitted by the first display panel 10 is emitted to the second display panel 20, the second pixel 200 in the third pixel region N1 and the second pixel 200 in the fourth pixel region N2 of the second display panel 20 are controlled to be in a dark state or a bright state respectively, and the light passes through the color-resist layer 204 of the second display panel 20 to display color images with different brightness; optionally, the color of the light emitted from the second display panel 20 includes red, green, blue or white. At this time, the luminance of the third pixel region N1 is a ", the luminance of the fourth pixel region N2 is B", the luminance difference between the third pixel region N1 and the fourth pixel region N2 is C ", and C" — a "— B" — C ", then C" > C. Therefore, the contrast of the light emitted from the third pixel region N1 and the fourth pixel region N2 of the second display panel 20 is significantly improved, and the contrast of the display image of the entire display device can be improved.
In some alternative embodiments, please continue to refer to fig. 1, fig. 2 and fig. 5, in the present embodiment, each light emitting unit 400 includes a plurality of LED lamp beads or mini LED lamp beads 4001.
The embodiment further explains that the light-emitting unit 400 as a light source in the backlight module 40 may include a plurality of LED lamp beads or a mini LED lamp bead 4001, wherein the mini LED lamp bead is also called a sub-millimeter light-emitting diode, which means an LED having a grain size of about 100 micrometers or more, in technical principle, the direct type backlight module manufactured by using a plurality of mini LED lamp beads arranged in an array has a plurality of dynamic partitions, the dimming response speed is faster, the control precision is higher, the speed of the dynamic partition backlight response and the brightness of each partition can be greatly improved, and the thickness of the backlight module can be reduced.
In some optional embodiments, please continue to refer to fig. 1 to fig. 3, in the present embodiment, the first display panel 10 is any one of a liquid crystal display panel or an organic light emitting display panel, and the first display function layer 103 includes a first liquid crystal layer or an organic light emitting layer;
the second display panel 20 is a liquid crystal display panel, and the second display function layer 203 includes a second liquid crystal layer.
This embodiment further explains that the second display panel 20 of the display device 000 may be a liquid crystal display panel, and then the second display functional layer 203 includes a second liquid crystal layer, and the second display panel 20 utilizes the liquid crystal molecules of the second display functional layer 203 to change the arrangement direction of the liquid crystal molecules under the action of the external electric field, so that an external light source (a backlight source provided by a backlight module) can pass through the second liquid crystal layer, thereby displaying an image. The first display panel 10 only needs to adjust and control the brightness thereof, so as to realize fine adjustment and control of the second display panel 20, thereby improving the contrast of the whole display device by 000. Therefore, the first display panel 10 can be a liquid crystal display panel, in which case the first display function layer 103 includes a first liquid crystal layer, and the display device 00 further includes a backlight module 40 (as shown in fig. 4) located on a side of the first display panel 10 away from the second display panel 20. As shown in fig. 6, fig. 6 is a schematic diagram illustrating a display principle structure of the first display panel 10 of this embodiment, and at this time, the first display function layer 103 includes an Organic Light-Emitting layer 1031, and the Organic Light-Emitting display panel, i.e., an Organic Light-Emitting Diode (OLED) panel, is a novel flat panel display, and has the characteristics of active Light emission, high Light-Emitting brightness, wide viewing angle, fast response speed, low energy consumption, flexibility, and the like. When a current passes through the organic light emitting layer 1031, the organic light emitting layer emits light, and the light emission luminance depends on the magnitude of the current, and the larger the current, the higher the luminance, and vice versa. The basic structure of the organic light emitting display panel may include a thin transparent indium tin oxide layer 1032 with semiconductor characteristics connected to the anode, and another metal cathode 1033 as a sandwich structure. When a voltage is applied, the positive holes and the cathode charges are combined in the organic light emitting layer to emit light, and light LT is emitted from the anode of the indium tin oxide layer 1032. According to its different formula, it can produce three primary colors of red, green and blue (R, G, B), and form basic color. It should be noted that the organic light emitting display panel of the present embodiment may further include an electron transport layer 1034 between the metal cathode 1033 and the organic light emitting layer 1031, and a hole transport layer 1035 between the indium tin oxide layer 1032 and the organic light emitting layer 1031.
In some optional embodiments, please refer to fig. 4, fig. 5 and fig. 7 in combination, fig. 7 is another schematic diagram of a split structure of fig. 1, and this embodiment provides a display method of a display device, in which the display device 000 includes:
the backlight module 40, the backlight module 40 includes a plurality of light emitting units 400 arranged in an array;
the first display panel 10, the first display panel 10 is located on one side of the light-emitting surface of the backlight module 40, the first display panel 10 includes a first substrate 101, a second substrate 102 and a first display function layer 103, the first substrate 101 and the second substrate 102 are arranged oppositely, the first display function layer 103 is arranged between the first substrate 101 and the second substrate 102, the second substrate 102 is located on one side of the first substrate 101 far away from the backlight module 40, and the first display panel 10 realizes black and white display; the first display panel 10 includes a plurality of first pixels 100 arranged in an array;
the second display panel 20, the second display panel 20 is located on one side of the light emitting surface of the first display panel 10, the second display panel 20 includes a third substrate 201, a fourth substrate 202 and a second display function layer 203, the third substrate 201 and the fourth substrate 202 are oppositely arranged, the second display function layer 203 is arranged between the third substrate 201 and the fourth substrate 202, the fourth substrate 202 is located on one side of the third substrate 201 far away from the first display panel, and the fourth substrate 202 or the third substrate 201 includes a color-resist layer 204; optionally, the third substrate 201 may be an array substrate, and the fourth substrate 202 may be a color filter substrate; in fig. 2, the fourth substrate 202 is taken as a color filter substrate and includes a color resist layer 204 for illustration; the second display panel 20 includes a plurality of second pixels 200 arranged in an array;
a diffusion optical paste 30 between the first display panel 10 and the second display panel 20, the diffusion optical paste 30 being made by doping diffusion particles 302 in an optical paste 301;
the display device 000 further includes a first driving circuit 601, a second driving circuit 602, and a third driving circuit 603 (not filled in fig. 7, wherein the first driving circuit 601 and the second driving circuit 602 may be integrated on the same driving chip, or may be designed as a driving chip respectively), the first driving circuit 601 is electrically connected to the backlight module 40, the second driving circuit 602 is electrically connected to the first display panel 10, and the third driving circuit 603 is electrically connected to the second display panel 20;
the backlight module 40 includes a plurality of light-emitting areas M, each light-emitting area M includes a plurality of light-emitting units 400, and the light-emitting areas M include at least a first light-emitting area M1 and a second light-emitting area M2; the first display panel 10 includes a first pixel region F1 corresponding to the first light emitting region M1, a second pixel region F2 corresponding to the second light emitting region M2; the second display panel 20 includes a third pixel region N1 corresponding to the first light emitting region M1, a fourth pixel region N2 corresponding to the second light emitting region M2;
the display method comprises the following steps:
the driving signal of the first driving circuit 601 controls the brightness of different light emitting areas M of the backlight module 40; the luminance of the first light-emitting region M1 is a, the luminance of the second light-emitting region M2 is B, the luminance difference between the first light-emitting region M1 and the second light-emitting region M2 is C, and C is a-B;
the light emitted from the backlight module 40 is emitted to the first display panel 10, the driving signal of the second driving circuit 602 controls the first pixel 100 in the first pixel area F1 of the first display panel 10 to be in a bright state, and the first pixel 100 in the second pixel area F2 to be in a dark state, i.e., the light transmittance of the first pixel area F1 for bright state display is greater than the light transmittance of the second pixel area F2 for dark state display. At this time, the luminance of the first pixel region F1 is a ', the luminance of the second pixel region F2 is B ', the luminance difference between the first pixel region F1 and the second pixel region F2 is C ', and C ═ a ' -B '; wherein, A ' ═ A, B ' < B, then C ' > C;
the light emitted by the first display panel 10 is emitted to the second display panel 20, the driving signal of the third driving circuit 603 controls the second pixel 200 in the third pixel region N1 and the second pixel 200 in the fourth pixel region N2 of the second display panel 20 to be in a dark state or a bright state respectively, and the light passes through the color-resist layer 204 of the second display panel 20 and then displays color images with different brightness; at this time, the luminance of the third pixel region N1 is a ", the luminance of the fourth pixel region N2 is B", the luminance difference between the third pixel region N1 and the fourth pixel region N2 is C ", and C" — a "— B" — C ", then C" > C.
Specifically, in the display method of the display device according to the embodiment, the display device 000 is formed by disposing the diffusion optical paste 30 between the first display panel 10 and the second display panel 20, wherein the diffusion optical paste 30 is a novel material and is prepared by doping the diffusion particles 302 in the optical paste 301. The diffusion optical cement 30 is bonded with the first display panel 10 and the second display panel 20, and the optical cement 301 can realize the fixed bonding effect of the double-layer panels, so that the surface connection has higher strength. Because the arrangement of the original diffusion sheet is reduced, the optical glue and the diffusion sheet in the prior art are combined into a whole, and the thinning of the device is further facilitated. The first display panel 10 and the second display panel 20 are bonded and fixed by the diffusion optical cement 30, and the problem that the air layer influences the penetration rate due to the air bonding technology can be avoided, so that the penetration rate of the display device 000 can be improved, and the display quality can be improved. By adopting the display method of the embodiment, the contrast of the light respectively emitted from the third pixel region N1 and the fourth pixel region N2 of the second display panel 20 is obviously improved, so that the contrast of the display image of the whole display device can be improved, and the display effect and the display quality can be improved.
In some optional embodiments, referring to fig. 7 again, in this embodiment, the second driving circuit 602 includes a scan driving circuit 6021 and a data driving circuit 6022, the scan driving circuit 6021 provides a plurality of scan signals to turn on the first pixels 100 in the corresponding first pixel area F1 and the first pixels 100 in the second pixel area F2, the data driving circuit 6022 is configured to control the data voltages of the first pixels 100 in the corresponding first pixel area F1 and the second pixel area F2 to be different, so as to control the first pixels 100 in the first pixel area F1 of the first display panel 10 to be in a bright state and the first pixels 100 in the second pixel area F2 to be in a dark state, and further, the data voltages received by each of the first pixels 100 are different to realize dark state or bright state display.
In some optional embodiments, please refer to fig. 7, in this embodiment, in a range corresponding to the same first light-emitting region M1, the number of the first pixels 100 in the first pixel region F1 is smaller than or equal to the number of the second pixels 200 in the third pixel region N1 (in the range corresponding to the same first light-emitting region M1, the number of the first pixels 100 in the first pixel region F1 is smaller than the number of the second pixels 200 in the third pixel region N1 in fig. 7 for example).
The present embodiment further explains that the display device 000 implements fine control on the second display panel 20 through brightness control of the first display panel 10 itself, so as to achieve an effect of improving contrast of the whole display device 000, and therefore, the display device is arranged in a range corresponding to the same first light-emitting region M1, and the number of the first pixels 100 in the first pixel region F1 is less than or equal to the number of the second pixels 200 in the third pixel region N1, thereby further facilitating the effect of improving contrast.
In some optional embodiments, please refer to fig. 8, fig. 8 is a schematic flowchart illustrating a manufacturing method of a display device according to an embodiment of the present invention, where the manufacturing method of the display device according to the embodiment is used to manufacture the display device according to the embodiment; the method specifically comprises the following steps:
step 001: providing a first display panel 10;
step 002: preparing diffusion optical cement 30, doping diffusion particles 302 in optical cement 301, and mixing the diffusion particles 302 with the optical cement 301;
step 003: the diffusion optical cement 30 is in a semi-cured state through drying equipment;
step 004: cutting the semi-cured diffusion optical adhesive 30 into a plurality of sub-diffusion optical adhesives with the same size as the first display panel 10 by a roll cutting process;
step 005: attaching the sub-diffusion optical adhesive to one side of the light emitting surface of the first display panel 10;
step 006: providing a second display panel 20;
step 007: the second display panel 20 is attached to a side of the sub-diffusion optical adhesive 30 away from the first display panel 10.
The present embodiment further explains the manufacturing method of the display device 000 in the above embodiment, and it can be understood that the manufacturing method of the first display panel 10 and the second display panel 20 in the present embodiment can refer to the manufacturing method of the liquid crystal display panel and the organic light emitting display panel in the related art according to the type of the panels, and the details of the present embodiment are not repeated herein. In the manufacturing method of the present embodiment, the diffusion optical paste 30 is manufactured after the first display panel 10 is provided (may also be manufactured at the same time as or before the first display panel 10 is provided). The process of preparing the diffusion optical adhesive 30 is to prepare the optical adhesive 301, wherein the optical adhesive 301 is prepared by preparing an optical acrylic adhesive without a base material, and then respectively attaching a layer of release film to the upper bottom layer and the lower bottom layer, so that the optical acrylic adhesive is a double-sided adhesive tape without a base material, and is an adhesive with a good effect. Then, the optical paste 301 (which may be in a liquid state or a semi-cured state) is doped with the diffusion particles 302, so that the diffusion particles 302 are mixed with the optical paste 301. Then, the diffusion optical adhesive 30 is semi-cured by a drying device, and then the preparation of the semi-cured diffusion optical adhesive 30 is completed, and then the semi-cured diffusion optical adhesive 30 is cut into a plurality of sub-diffusion optical adhesives with the same size as the first display panel 10 by a roll cutting process, and the sub-diffusion optical adhesives are attached to one side of the light emitting surface of the first display panel 10. Finally, providing the second display panel 20, and attaching the second display panel 20 to the side of the sub-diffusion optical adhesive 30 away from the first display panel 10, thereby completing the manufacturing of the display device of the present embodiment.
In some optional embodiments, please refer to fig. 9, fig. 9 is a schematic flowchart of a manufacturing method of another display device according to an embodiment of the present invention, where the manufacturing method of the display device according to the embodiment specifically includes:
step 011: providing a first display panel 10;
step 012: preparing diffusion optical cement 30, doping diffusion particles 302 in optical cement 301, and mixing the diffusion particles 302 with the optical cement 301;
step 013: coating the prepared diffusion optical adhesive 30 (which may be in liquid state) on the light-emitting surface side of the first display panel 10
Step 014: the diffusion optical cement 30 is in a semi-cured state through drying equipment;
step 015: providing a second display panel 20;
step 016: the second display panel 20 is attached to a side of the sub-diffusion optical adhesive 30 away from the first display panel 10.
It can be understood that the display device manufactured by the manufacturing method of the embodiment has the advantages of the display device in the above embodiments, and the display panel provided by the embodiment of the present invention, and specific descriptions of the display device in the above embodiments may be specifically referred to, and the detailed description of the embodiment is not repeated herein.
According to the embodiment, the display device, the display method and the preparation method provided by the invention at least realize the following beneficial effects:
in the display device provided by the invention, the diffusion optical cement is arranged between the first display panel and the second display panel, wherein the diffusion optical cement is a novel material and is prepared by doping diffusion particles in the optical cement. The diffusion optical cement is attached to the first display panel and the second display panel, the double-layer panels can be fixedly attached through the optical cement, and the surface connection has higher strength. And the diffusion particles in the diffusion optical adhesive can also reduce the generation of optical interference fringes, and the diffusion particles can atomize the light emitted from the light-emitting surface of the first display panel, so that the optical interference fringes between the first display panel and the second display panel can be reduced. Because the arrangement of the original diffusion sheet is reduced, the optical glue and the diffusion sheet in the prior art are combined into a whole, and the thinning of the device is further facilitated. Adopt diffusion optical cement to laminate fixedly between first display panel and the second display panel, the problem that the air bed that can also avoid air bonding technique to bring influences the penetration rate to be favorable to promoting display device's penetration rate, be favorable to improving the display quality. Therefore, the display device provided by the invention can improve the contrast of a display picture, avoid the generation of optical interference fringes in a double-layer display panel, and simultaneously improve the penetration rate of the display device, thereby being beneficial to improving the display effect and the display quality.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (16)

1. A display device, comprising:
the display device comprises a first display panel and a second display panel, wherein the first display panel comprises a first substrate, a second substrate and a first display function layer, the first substrate and the second substrate are oppositely arranged, the first display function layer is arranged between the first substrate and the second substrate, and the second substrate is positioned on one side, close to a light emitting surface of the display device, of the first substrate;
the second display panel is positioned on one side of the light-emitting surface of the first display panel and comprises a third substrate, a fourth substrate and a second display function layer, wherein the third substrate and the fourth substrate are arranged oppositely, the second display function layer is arranged between the third substrate and the fourth substrate, the fourth substrate is positioned on one side of the third substrate, which is far away from the first display panel, and the fourth substrate or the third substrate comprises a color resistance layer;
and the diffusion optical cement is prepared by doping diffusion particles in the optical cement.
2. The display device according to claim 1, wherein a material of the diffusion particles in the diffusion optical paste comprises polymethyl methacrylate or nylon.
3. The display device according to claim 1, wherein the diffusion particles in the diffusion optical paste have a particle diameter in a range of 0.5 to 25 μm, and the diffusion particles have a shape of either or both of a sphere and an ellipsoid.
4. The display device of claim 1, wherein the diffusing optical glue has a thickness in the range of 0.02mm to 0.3 mm.
5. The display device according to claim 1, wherein the first display panel realizes black-and-white display, and wherein the second display panel realizes color display.
6. The display device according to any one of claims 1 to 5, further comprising a backlight module disposed on a side of the first display panel away from the second display panel.
7. The display device according to claim 6, wherein the backlight module is a direct-type backlight module or a side-type backlight module, a first polarizer is disposed between the backlight module and the first display panel, a second polarizer is disposed between the first display panel and the second display panel, and a third polarizer is disposed on a side of the second display panel away from the first display panel.
8. The display device according to claim 7, wherein the first polarizer comprises any one of a direct attached reflective polarizer or a direct attached reflective brightness enhancement sheet.
9. The display device according to claim 6,
the backlight module comprises a plurality of light-emitting units arranged in an array;
the first display panel comprises a plurality of first pixels arranged in an array, and the second display panel comprises a plurality of second pixels arranged in an array;
in a same region of the display device, the number of the light emitting units is less than or equal to the number of the first pixels, and the number of the first pixels is less than or equal to the number of the second pixels.
10. The display device according to claim 9, wherein each of the light emitting units includes a plurality of LED lamp beads or miniLED lamp beads.
11. The display device according to any one of claims 1 to 5,
the first display panel is any one of a liquid crystal display panel or an organic light emitting display panel, and the first display function layer comprises a first liquid crystal layer or an organic light emitting layer;
the second display panel is a liquid crystal display panel, and the second display function layer comprises a second liquid crystal layer.
12. A display method of a display device is characterized in that,
the display device includes:
the backlight module comprises a plurality of light-emitting units which are arranged in an array;
the first display panel is positioned on one side of a light-emitting surface of the backlight module and comprises a first substrate, a second substrate and a first display function layer, wherein the first substrate and the second substrate are arranged oppositely, the first display function layer is arranged between the first substrate and the second substrate, the second substrate is positioned on one side of the first substrate, which is far away from the backlight module, and black and white display is realized by the first display panel; the first display panel comprises a plurality of first pixels arranged in an array;
the second display panel is positioned on one side of the light-emitting surface of the first display panel and comprises a third substrate, a fourth substrate and a second display function layer, wherein the third substrate and the fourth substrate are arranged oppositely, the second display function layer is arranged between the third substrate and the fourth substrate, the fourth substrate is positioned on one side of the third substrate, which is far away from the first display panel, and the fourth substrate or the third substrate comprises a color resistance layer; the second display panel comprises a plurality of second pixels arranged in an array;
diffusion optical cement between the first display panel and the second display panel, wherein the diffusion optical cement is prepared by doping diffusion particles in the optical cement;
the display device further comprises a first driving circuit, a second driving circuit and a third driving circuit, wherein the first driving circuit is electrically connected with the backlight module, the second driving circuit is electrically connected with the first display panel, and the third driving circuit is electrically connected with the second display panel;
the backlight module comprises a plurality of light emitting areas, each light emitting area comprises a plurality of light emitting units, and the light emitting areas at least comprise a first light emitting area and a second light emitting area;
the first display panel comprises a first pixel region corresponding to the first light emitting region and a second pixel region corresponding to the second light emitting region;
the second display panel comprises a third pixel region corresponding to the first light-emitting region and a fourth pixel region corresponding to the second light-emitting region;
the display method comprises the following steps:
the driving signal of the first driving circuit controls the brightness of different light emitting areas of the backlight module; the brightness of the first light-emitting area is A, the brightness of the second light-emitting area is B, the brightness difference value between the first light-emitting area and the second light-emitting area is C, and C is A-B;
the light emitted by the backlight module is emitted to the first display panel, a driving signal of the second driving circuit controls a first pixel in the first pixel area of the first display panel to be in a bright state, a first pixel in the second pixel area to be in a dark state, at this time, the brightness of the first pixel area is A ', the brightness of the second pixel area is B', the brightness difference value between the first pixel area and the second pixel area is C ', and C' is A '-B'; wherein, A ' ═ A, B ' < B, then C ' > C;
the light emitted by the first display panel is emitted to the second display panel, a driving signal of the third driving circuit controls a second pixel in the third pixel area and a second pixel in the fourth pixel area of the second display panel to be in a dark state or a bright state respectively, and the light passes through the color resistance layer of the second display panel to display color images with different brightness; at this time, the luminance of the third pixel region is a ", the luminance of the fourth pixel region is B", the luminance difference between the third pixel region and the fourth pixel region is C ", and C ═ a ″ -B ═ C', then C ″ > C.
13. The method according to claim 12, wherein a light transmittance of the first pixel region is greater than a light transmittance of the second pixel region.
14. The method according to claim 12, wherein the second driving circuit comprises a scan driving circuit and a data driving circuit, the scan driving circuit provides a plurality of scan signals for turning on the first pixels in the first pixel region and the second pixels in the second pixel region, and the data driving circuit controls the data voltages of the first pixels in the first pixel region and the second pixel region to be different, so as to control the first pixels in the first pixel region of the first display panel to be in a bright state and the first pixels in the second pixel region to be in a dark state.
15. The method according to claim 12, wherein the number of first pixels in the first pixel region is smaller than or equal to the number of second pixels in the third pixel region in a range corresponding to the first light-emitting region.
16. A method of manufacturing a display device, the method comprising:
providing a first display panel;
preparing diffusion optical cement, doping diffusion particles in the optical cement, and mixing the diffusion particles with the optical cement;
enabling the diffusion optical cement to be in a semi-solidified state through drying equipment;
cutting the semi-cured diffusion optical adhesive into a plurality of sub-diffusion optical adhesives with the same size as the first display panel through a roll cutting process;
attaching the sub-diffusion optical adhesive to one side of the light emitting surface of the first display panel;
providing a second display panel;
and attaching the second display panel to one side of the sub-diffusion optical cement, which is far away from the first display panel.
CN201911354951.8A 2019-12-25 2019-12-25 Display device and display method and preparation method thereof Pending CN110928036A (en)

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