WO2022237246A1 - Film composite et dispositif d'affichage - Google Patents

Film composite et dispositif d'affichage Download PDF

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Publication number
WO2022237246A1
WO2022237246A1 PCT/CN2022/075488 CN2022075488W WO2022237246A1 WO 2022237246 A1 WO2022237246 A1 WO 2022237246A1 CN 2022075488 W CN2022075488 W CN 2022075488W WO 2022237246 A1 WO2022237246 A1 WO 2022237246A1
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WO
WIPO (PCT)
Prior art keywords
layer
prism
display device
light
prism layer
Prior art date
Application number
PCT/CN2022/075488
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English (en)
Chinese (zh)
Inventor
邓天应
陈细俊
季洪雷
郭俊秋
许怀书
宋庆欢
Original Assignee
惠州视维新技术有限公司
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Publication date
Application filed by 惠州视维新技术有限公司 filed Critical 惠州视维新技术有限公司
Publication of WO2022237246A1 publication Critical patent/WO2022237246A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays
    • 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
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0294—Diffusing elements; Afocal elements characterized by the use adapted to provide an additional optical effect, e.g. anti-reflection or filter
    • 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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members

Definitions

  • the invention relates to the field of display technology, in particular to a composite membrane and a display device.
  • the invention provides a composite film and a display device, which effectively solves the fringe interference problem caused by the existing compound optical film.
  • An embodiment of the present invention provides a composite membrane, comprising: a first back coating layer; a first substrate layer located on the first back coating layer; a first prism layer located on the first substrate layer; The second substrate layer positioned on the first prism layer, the first prism layer is bonded with the second substrate layer by an adhesive layer; the second prism positioned on the second substrate layer layer, the second prism layer includes a plurality of first pyramidal structures.
  • the first prism layer includes a plurality of second tapered structures.
  • the surface of the first tapered structure and/or the second tapered structure is provided with a plurality of depressions and/or a plurality of protrusions.
  • the first pyramid structure and/or the second pyramid structure includes a regular pyramid structure.
  • a plurality of the first tapered structures and a plurality of the second tapered structures are distributed in an array on the second base material layer and the first base material layer respectively.
  • the heights of the plurality of tapered structures are not all the same.
  • the first back coat layer and/or the bonding adhesive layer are doped with a plurality of diffusion particles.
  • a second back coat layer is further provided between the second substrate layer and the bonding adhesive layer.
  • the haze of the first back coating ranges from 3% to 25%, and the haze of the second back coating ranges from 20% to 40%.
  • the thickness of the first back coat layer is in the range of 1 ⁇ m ⁇ 10 ⁇ m.
  • the material of the first base material layer and the second base material layer is PET material, and the thickness range of the first base material layer and the second base material layer is 125 ⁇ m ⁇ 250 ⁇ m.
  • An embodiment of the present invention also provides a display device, including the composite film described in any one of the above embodiments.
  • the composite membrane comprises a first back coat layer, a first base material layer, a first prism layer, a second base material layer and a second prism layer which are sequentially stacked, wherein, The first prism layer is bonded to the second substrate layer through an adhesive layer, and the second prism layer includes a plurality of first tapered structures.
  • the first prism layer and the second prism layer in the composite film, and the second prism layer includes a plurality of first cone-shaped structures, so that when light enters the second prism layer from the first prism layer, the first cone The cone-shaped structure plays a role in gathering the incoming light to ensure a certain brightness of the outgoing light.
  • Fig. 1 is a schematic structural view of a composite diaphragm provided by an embodiment of the present invention
  • Fig. 2 is a schematic diagram of the distribution structure of the first tapered structure on the second substrate layer provided by the embodiment of the present invention
  • Fig. 3 is a schematic structural diagram of another composite membrane provided by an embodiment of the present invention.
  • first and second are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features.
  • a feature defined as “first” or “second” may explicitly or implicitly include one or more of said features.
  • “plurality” means two or more, unless otherwise specifically defined.
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction of two components relation.
  • installation connection
  • connection connection
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction of two components relation.
  • a first feature being “on” or “under” a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them.
  • “above”, “above” and “above” the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.
  • “Below”, “beneath” and “under” the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.
  • FIG. 1 is a schematic structural view of a composite membrane provided by the present invention, as shown in Fig.
  • the first substrate layer 102 is located on the first back coat layer 101
  • the first prism layer 103 is located on the first substrate layer 102
  • the second substrate layer 105 is located on the first prism layer 103
  • the second substrate layer 105 is bonded to the first prism layer 103 through the adhesive layer 104
  • the second prism layer 106 is located on the second substrate layer 105 .
  • FIG. 2 is a schematic structural diagram of a second prism layer 106 provided by the present invention.
  • the second prism layer 106 includes a plurality of first tapered structures.
  • the material of the first substrate layer 102 and the second substrate layer 105 is preferably selected from polyethylene terephthalate (PET), polycarbonate (PC), polymethyl methacrylate (PMMA ), when the material of the first substrate layer 102 and the second substrate layer 105 is PET, the thickness range is 125 ⁇ m to 250 ⁇ m, which has excellent physical properties and chemical properties, and has stable dimensions It has the characteristics of better resistance and transparency, and the impact strength is also higher, which is beneficial to avoid excessive abrasion of the first base material layer 102 and the second base material layer 105 .
  • PET polyethylene terephthalate
  • PC polycarbonate
  • PMMA polymethyl methacrylate
  • the function of the first back coating layer 101 disposed on the surface of the first substrate layer 102 is to disperse and soften the light incident into the composite film 100 , and to diffuse and shield the light.
  • the first back coat layer 101 can be formed by a coating liquid containing hydroxy acrylic resin and a polyisocyanate crosslinking agent through heat curing and other processes, wherein the function of the polyisocyanate crosslinking agent is to promote the heat curing reaction and strengthen the first back coat layer 101.
  • the first back coat layer 101 can also be formed by a coating liquid containing UV resin through UV curing and other processes.
  • the thickness range of the first back coating layer 101 is preferably 1 ⁇ m to 10 ⁇ m. When the thickness of the first back coating layer is within the above range, it can better play the role of scattering light and ensure the intensity of the incident light. .
  • the first prism layer 103 and the second prism layer 106 are preferably UV resin, more specifically, preferably UV acrylic resin, when the material of the first prism layer 103 and the second prism layer 106 is preferably UV acrylic resin , because the acrylic resin has excellent hardness, the corresponding first prism layer 103 and the second prism layer 106 are more excellent in wear resistance, and because the acrylic resin has excellent optical properties at the same time, it can also ensure that the first prism layer 103 and the light-gathering performance of the second prism layer 106.
  • the thickness range of the first prism layer 103 and the second prism layer 106 is preferably 15 ⁇ m to 30 ⁇ m.
  • the first prism layer 103 and the second prism layer 106 When the thicknesses of the first prism layer 103 and the second prism layer 106 are in the above range, the first prism layer can be ensured 103 and the second prism layer 106 light transmission performance and structural strength, that is, on the one hand, it can avoid the easy damage problem caused by the low structural strength of the first prism layer 103 and the second prism layer 106, and on the other hand On the one hand, it can avoid the problem that the light output intensity of the prism layer decreases due to the excessive thickness of the first prism layer 103 and the second prism layer 106 .
  • the bonding adhesive layer 104 as an adhesive layer for bonding the first prism layer 103 and the second substrate layer 105, may include UV resin and thermosetting resin.
  • the bonding adhesive layer has a certain light transmittance.
  • the haze of the bonding adhesive layer is preferably in the range of 0-10%.
  • the first pyramid structure included in the second prism layer 106 may be a polygonal pyramid structure such as a triangular pyramid, a quadrangular pyramid, and the first pyramid structure included in the second prism layer 106 may also be an irregular pyramid structure,
  • the first tapered structure includes a plurality of tapered surfaces, compared with the existing second prism layer composed of triangular prisms, it is beneficial to gather the light rays entering the second prism layer 106 from different directions to a direction perpendicular to the first prism layer. The direction of the surface of the second prism layer 106 is emitted, thereby improving the brightness of the light corresponding to the direction.
  • the multiple tapered surfaces included in the first tapered structure 1061 facilitate the transmission of the emitted light along multiple angles, which can make the direction of the emitted light misaligned with the pixels in the display device, thereby avoiding light interference.
  • there is a certain distance between two adjacent first tapered structures Preferably, the distance between two adjacent first tapered structures 1061 is in the range of 20 ⁇ m to 40 ⁇ m. When the distance is within the above range, there is It is beneficial for the direction of the light emitted from the first tapered structure to be misaligned with the pixel point, further avoiding interference phenomenon.
  • the first prism layer 103 may also include a plurality of the second tapered structures.
  • the second pyramidal structure may also include multiple pyramidal structures such as triangular pyramids and quadrangular pyramids, and the second pyramidal structure (not shown in the figure) may also include multiple irregular pyramidal structures.
  • there is also a certain distance between two adjacent second conical structures preferably the distance between two adjacent second conical structures is in the range of 55 ⁇ m to 70 ⁇ m, when the distance is within the above range, since the two adjacent
  • the distance between the first tapered structures 1061 is preferably in the range of 20 ⁇ m to 40 ⁇ m, which is conducive to the misalignment of the first tapered structures 1061 and the second tapered structures, and avoids the gap between the first tapered structures 1061 and the second tapered structures.
  • the interference phenomenon occurs between the light emitted from the biconical structure.
  • the second prism layer 106 may comprise a plurality of first prismatic structures, because a plurality of conical surfaces of the second conical structures have been The light is transmitted according to multiple angles, that is, the emitted light is misaligned with the pixel point, and at this time, the plurality of first prism structures included in the second prism layer will not cause light interference.
  • first prism layer 103 may also include a plurality of second prismatic structures, and the second prismatic structures can also play the role of light concentrating and brightening, and the prism surfaces of the second prismatic structures The mismatch with the tapered surface of the first tapered structure 1061 can further avoid light interference.
  • the surface of the first tapered structure 1061 and/or the second tapered structure is provided with a plurality of depressions and/or a plurality of protrusions.
  • the plurality of depressions 1062 and/or the plurality of protrusions 1063 provided on the surface of the first conical structure 1061 are one or more of spherical, ellipsoidal or cubic. , which serves as the light diffusion point in the second prism layer, and the light is emitted from the surface of the protruding portion 1063 or the concave portion 1062, which plays the role of scattering light.
  • the diameter of the protrusion 1063 and the depression 1062 on the first prism layer ranges from 5 ⁇ m to 10 ⁇ m, and the height ranges from 1 ⁇ m to 5 ⁇ m.
  • the plurality of depressions (not shown in the figure) and/or protrusions (not shown in the figure) provided on the surface of the second conical structure are spherical, ellipsoidal or cubic
  • One or more of the shapes, as the light diffusion point in the first prism layer, also plays the role of scattering light.
  • the diameter of the protrusion and the depression on the second tapered structure ranges from 5 ⁇ m to 15 ⁇ m, and the height ranges from 1 ⁇ m to 5 ⁇ m.
  • first pyramid structure 1061 and/or the second pyramid structure includes a regular pyramid structure.
  • the first pyramid structure 1061 and/or the second pyramid structure includes a regular pyramid structure, and may include regular n pyramids, where n ⁇ 3. It should be pointed out that when n is larger, there are more cone surfaces corresponding to the first cone structure 1061 and the second cone structure, for example, when n is 3, the corresponding cone surface is 3; when n is 4 , the corresponding cone is 4. When the first cone structure and the second cone structure have more cone surfaces, there are more light emitting surfaces corresponding to the second prism layer and the first prism layer, which is more conducive to the scattering of light and makes the display effect more uniform.
  • a plurality of the first tapered structures 1061 and a plurality of the second tapered structures are distributed in an array on the second substrate layer 105 and the first substrate layer 102 respectively.
  • a plurality of the first tapered structures 1061 and a plurality of the second tapered structures can be distributed in arrays at equal intervals on the second substrate layer 105 and the first substrate layer 102 respectively, wherein adjacent
  • the distance between two first tapered structures is preferably in the range of 20 ⁇ m to 40 ⁇ m, and the distance between two adjacent second tapered structures is preferably in the range of 55 ⁇ m to 70 ⁇ m.
  • a plurality of the first tapered structures 1061 and a plurality of the second tapered structures can be arranged on the second substrate layer 105 and the first substrate layer 102 respectively. It is randomly distributed, which can reduce the brightness of the light to meet the corresponding brightness requirements.
  • the heights of the plurality of first tapered structures 1061 are not all the same.
  • the plurality of first tapered structures 1061 can be selected to be arranged as a plurality of first tapered structures with unequal heights, by arranging a plurality of the first tapered structures 1061 as tapered structures with different heights, and When a plurality of the first tapered structures 1061 with a certain height difference are arranged alternately, the phenomenon of light output interference between the multiple first tapered structures 1061 is reduced.
  • the height of the plurality of first tapered structures 1061 preferably ranges from 10 ⁇ m to 30 ⁇ m.
  • the first back coat layer 101 and/or the adhesive layer 104 are doped with a plurality of diffusion particles.
  • the diffusing particles can be inorganic particles, such as silicon dioxide, titanium dioxide, aluminum oxide, zinc oxide, calcium carbonate, barium sulfate, etc., and are preferably silicon dioxide.
  • the diffusion particles may also be organic particles, such as acrylic particles, silicone particles, polyurethane particles, polystyrene particles, etc., preferably acrylic particles.
  • the plurality of diffusion particles doped on the surface of the first back coat layer 101 form a diffusion layer, which acts as a diffusion film, and can disperse the light incident on the first substrate layer 102, further softening and scattering the corresponding light. of incident light.
  • the bonding adhesive layer 104 is mainly cured by UV resin, solvent and organic particles, wherein each component in the bonding adhesive layer 104 is calculated by weight percentage They are: UV resin 25% ⁇ 35%, solvent 60% ⁇ 70%, organic particles 1% ⁇ 5%.
  • the UV resin includes one or more of polyurethane acrylic resin, epoxy acrylic resin and polyester acrylic resin, and the solvent includes one or more of lipid solvents, ketone solvents and toluene.
  • a second back coat layer 107 is further disposed between the second substrate layer 105 and the adhesive layer 104 .
  • the second back coat layer 107 can also be formed by a coating solution containing a hydroxyacrylic resin and a polyisocyanate crosslinking agent, through processes such as thermal curing, the same as the first back coat layer 101, and the second back coat layer Layer 107 also functions to scatter light.
  • the adhesive layer 104 bonding the first prism layer 103 and the second substrate layer 105 specifically refers to bonding the second back coat layer 107 on the second substrate layer 105 to the first prism layer. 103 bonding.
  • the thickness range of the second back coat layer 107 is preferably 1 ⁇ m ⁇ 5 ⁇ m, and within this thickness range, the second back coat layer 107 can better diffuse light.
  • the haze of the first back coating 101 ranges from 3% to 25%
  • the haze of the second back coating 107 ranges from 20% to 40%.
  • the haze is the percentage of the transmitted light intensity deviated from the incident light by an angle of 2.5° or more to the total transmitted light intensity. The greater the haze, the lower the gloss and transparency of the film, especially the imaging degree.
  • the haze range of the second back coating 107 is 3% to 25%, and when the haze range of the second back coating 107 is 20% to 40%, both the first back coating 101 and the second back coating 107 can better It has the effect of shading and scattering light.
  • the present invention also provides a display device (not shown in the figure), comprising the composite film according to any one of the above.
  • the display device further includes a light source and a backlight module
  • the backlight module specifically includes a reflective film, a light guide plate stacked on the reflective film in sequence, and the composite film according to any one of the above.
  • the light source is preferably an LED light source.
  • the function of the light source is to provide backlight brightness for the backlight module. Specifically, when the light emitted from the light source reaches a plurality of light guide points set in the light guide plate, the The light guide points are diffused to various angles, which can make the light guide plate become a surface light source that emits light evenly.
  • the function of the reflective film is to reflect the light leaked from the light guide plate to the surface of the reflective film back into the light guide plate, so as to achieve the purpose of reducing light loss and improving light utilization efficiency.
  • the display device also includes a display screen, a processor and a memory, the display screen is arranged on the composite film, and the display screen includes an upper polarizer, a color filter, a liquid crystal, a TFT (Thin Film Transistor, a thin film transistor) stacked in sequence. ) substrate and lower polarizer for displaying images, texts and other information.
  • the display can collect the user's touch operation on or near it (such as the user's operation on or near the display surface with a finger, stylus, etc. any suitable object or accessory), and according to the preset program Drive the corresponding connecting device.
  • the processor is the control center of the display device. It uses various interfaces and lines to connect various parts of the entire display device, and executes display by running or executing software programs and/or modules stored in the memory and calling data stored in the memory. Various functions and processing data of the device, so as to monitor the display device as a whole.
  • the processor may include one or more processing cores.
  • the display device also includes at least one sensor, such as a light sensor, a motion sensor, and other sensors.
  • the light sensor can include an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display screen according to the brightness of the ambient light, and the proximity sensor can turn off the backlight of the display screen when the display device moves to the ear.
  • the gravitational acceleration sensor can detect the magnitude of acceleration in various directions (generally three axes), and can detect the magnitude and direction of gravity when it is stationary, and can be used to identify the application of the attitude of the display device (such as horizontal and vertical screen switching, Related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tap), etc.; as for other sensors such as gyroscopes, barometers, hygrometers, thermometers, and infrared sensors that can also be configured on the display device, here No longer.
  • the composite membrane comprises a first back coat layer, a first base material layer, a first prism layer, a second base material layer and a second prism layer which are sequentially stacked, wherein, The first prism layer is bonded to the second substrate layer through an adhesive layer, and the second prism layer includes a plurality of first tapered structures.
  • the first prism layer and the second prism layer in the composite film, and the second prism layer includes a plurality of first cone-shaped structures, so that when light enters the second prism layer from the first prism layer, the first cone The cone-shaped structure plays a role in gathering the incoming light to ensure a certain brightness of the outgoing light.
  • the present invention by designing the haze of the first prism layer, the second prism layer, the adhesive layer, the first back coat and the second back coat, the light is further scattered, which can further avoid Corresponding light interference problem.
  • the present invention can also have other implementations. All technical solutions formed by equivalent replacement or equivalent replacement fall within the scope of protection required by the present invention.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

L'invention concerne un film composite (100) et un dispositif d'affichage. Le film composite (100) est pourvu d'une première couche de prisme (103) et d'une seconde couche de prisme (106) qui comprend une pluralité de premières structures effilées (1061), de telle sorte que lorsque la lumière entre dans la seconde couche de prisme (106) à partir de la première couche de prisme (103), la lumière incidente est collectée au moyen des premières structures effilées (1061), qui assure une certaine luminosité d'émission de lumière et est également favorable à la transmission, à des angles multiples, de la lumière émise à partir des premières structures effilées (1061), de telle sorte que la lumière émise correspondante n'est pas alignée avec des points de pixel dans le dispositif d'affichage.
PCT/CN2022/075488 2021-05-13 2022-02-08 Film composite et dispositif d'affichage WO2022237246A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110524405.5 2021-05-13
CN202110524405.5A CN113376723A (zh) 2021-05-13 2021-05-13 复合膜片和显示装置

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WO2022237246A1 true WO2022237246A1 (fr) 2022-11-17

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CN113376723A (zh) * 2021-05-13 2021-09-10 惠州视维新技术有限公司 复合膜片和显示装置
CN114518671A (zh) * 2022-02-24 2022-05-20 富盛光电（吴江）有限公司 一种分光板及带有该分光板的背光模组
CN114488618B (zh) * 2022-02-24 2023-03-21 富盛光电（吴江）有限公司 分光板组合结构

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