The present application claims a priority of the Chinese patent application No. 201810141989.6 filed on Feb. 11, 2018, which is incorporated herein by reference in its entirety.
The present disclosure relates to the field of display technology, in particular to a display panel, a manufacturing method thereof and a display device.
With development of Thin Film Transistor Liquid Crystal Display (TFT-LCD) technology as well as industrial technology, the manufacture cost of an LCD has been decreased and a manufacture process thereof has become more mature, the TFT-LCD has become a most popular technology instead of Cathode Ray Tube (CRT) display device in the field of flat panel display. In addition, the TFT-LCD has become an ideal display device for customers for its own advantages. However, display effect of the LCD may still be adversely affected by some factors. For example, when a color filter layer adopts quantum-dot material, the color filter layer is arranged under a TFT array to achieve a color display function in such a way that a light beam entering the display panel from below will be deflected to some extent, and when a deflection level is relatively large, the light beam for one subpixel may enter an adjacent subpixel, resulting in a crosstalk phenomenon and the display effect may be adversely affected. Hence, there is an urgent need for further improvement in LCD panel.
In one aspect, the present disclosure provides in some embodiments a display panel, including: a first substrate and a second substrate arranged opposite to each other; a liquid crystal layer arranged between the first substrate and the second substrate; and a first polarizer arranged between the first substrate and the liquid crystal layer. Liquid crystal molecules in the liquid crystal layer are initially aligned without an alignment film.
In a possible embodiment of the present disclosure, the liquid crystal molecules in the liquid crystal layer are initially aligned through an optical alignment process or arranged freely.
In a possible embodiment of the present disclosure, the display panel further includes: a first ultraviolet filter film arranged on a surface of the liquid crystal layer adjacent to the first substrate, wherein the first ultraviolet filter film is provided with a first alignment molecular chain on a surface adjacent to the liquid crystal layer; and a second ultraviolet filter film arranged on a surface of the liquid crystal layer adjacent to the second substrate, wherein the second ultraviolet filter film is provided with a second alignment molecular chain on a surface adjacent to the liquid crystal layer.
In a possible embodiment of the present disclosure, the liquid crystal layer contains liquid crystal nanocapsules.
In a possible embodiment of the present disclosure, each liquid crystal nanocapsule has a particle size of 100 to 200 nm.
In a possible embodiment of the present disclosure, a first electrode is arranged at a side of the first polarizer adjacent to the liquid crystal layer, and a second electrode is arranged at a side of the second substrate adjacent to the liquid crystal layer.
In a possible embodiment of the present disclosure, a third electrode, an insulation layer and a fourth electrode are sequentially arranged at a side of the second substrate adjacent to the liquid crystal layer in a direction toward the liquid crystal layer.
In a possible embodiment of the present disclosure, the first polarizer has a thickness of 100 nm to 20 nm.
In a possible embodiment of the present disclosure, the first polarizer is an attached polarizer, a coated polarizer or a wire-grid polarizer.
In a possible embodiment of the present disclosure, the display panel further includes a color filter layer arranged between the first substrate and the first polarizer. The color filter layer includes a black matrix and a plurality of color filter sheets arranged at a same layer as the black matrix, each of the color filter sheets contains a quantum-dot material. The black matrix is configured to define a plurality of subpixel openings spaced apart from each other and arranged in an array form, and each color filter sheet is arranged within a corresponding subpixel opening.
In a possible embodiment of the present disclosure, each color filter sheet includes a non-quantum-dot color filter sheet and a quantum-dot color filter sheet superimposed one on another.
In a possible embodiment of the present disclosure, the quantum-dot color filter sheet is arranged at a side of the non-quantum-dot color filter sheet adjacent to the liquid crystal layer.
In a possible embodiment of the present disclosure, the plurality of subpixel openings includes red subpixel openings, green subpixel openings and blue subpixel openings. The plurality of color filter sheets includes red color filter sheets each arranged in a corresponding red subpixel opening and green color filter sheets each arranged in a corresponding green subpixel opening. A transparent material is arranged in each blue subpixel opening.
In a possible embodiment of the present disclosure, the plurality of subpixel openings includes red subpixel openings, green subpixel openings and blue subpixel openings. The plurality of color filter sheets includes red color filter sheets each arranged in a corresponding red subpixel opening, green color filter sheets each arranged in a corresponding green subpixel opening, and blue color filter sheets each arranged in a corresponding blue subpixel opening.
In another aspect, the present disclosure provides in some embodiments a display device including the above-mentioned display panel.
In a possible embodiment of the present disclosure, a second polarizer and a blue backlight are arranged at a side of the second substrate away from the liquid crystal layer.
In a possible embodiment of the present disclosure, the display panel further includes a color filter layer arranged between the first substrate and the first polarizer. The color filter layer includes a black matrix and a plurality of color filter sheets arranged at a same layer as the black matrix, each of the color filter sheets contains a quantum-dot material. The black matrix is configured to define a plurality of subpixel openings spaced apart from each other and arranged in an array form, and each color filter sheet is arranged within a corresponding subpixel opening.
In a possible embodiment of the present disclosure, the plurality of subpixel openings includes red subpixel openings, green subpixel openings and blue subpixel openings. The plurality of color filter sheets includes red color filter sheets each arranged in a corresponding red subpixel opening and green color filter sheets each arranged in a corresponding green subpixel opening. A transparent material is arranged in each blue subpixel opening.
In yet another aspect, the present disclosure further provides in some embodiments a method for manufacturing a display panel, including: forming a first polarizer on one surface of a first substrate; and arranging the first substrate and the second substrate oppositely to form a cell. The first polarizer is arranged adjacent to the second substrate, and liquid crystal molecules in a liquid crystal layer are initially aligned without an alignment film.
In a possible embodiment of the present disclosure, subsequent to forming the first polarizer and prior to arranging the first substrate and the second substrate oppositely to form a cell, the method further includes forming a first ultraviolet filter film on a surface of the first polarizer away from the first substrate and forming a second ultraviolet filter film on a surface of the second substrate adjacent to the first substrate.
The present disclosure will be described hereinafter in conjunction with the drawings and embodiments. The following embodiments are for illustrative purposes only, but shall not be used to limit the scope of the present disclosure. Where no technique or condition is specified, the known technique or condition, or that specified in a product manual, may be applied. Where no manufacturer of a reagent or instrument is specified, the market-available reagent or instrument may be applied.
In the related art, a color crosstalk phenomenon may occur during operations of a quantum-dot display panel. It is found that, the color crosstalk can be alleviated remarkably through providing a polarizer in a liquid crystal cell (i.e., providing a quantum-dot color filter layer above a liquid crystal layer and providing the polarizer at a side of the quantum-dot color filter layer adjacent to the liquid crystal layer). However, the conventional polarizer is made of a material having insufficient heat resistance (a heat-resistance temperature of an iodine-containing polarizer is not greater than 100° C., and a heat-resistance temperature of a dye-containing polarizer is not greater than 130° C.). During the formation of an alignment film (having a curing temperature of 230° C.), the polarizer may be disabled. In view of above problems, the present disclosure provides a display panel capable of initially aligning liquid crystal molecules in the liquid crystal layer without an alignment film, and arranging the polarizer inside the liquid crystal cell, thereby to effectively alleviate the color crosstalk.
The present disclosure provides in some embodiments a display panel which, as shown in
It should be appreciated that, when the liquid crystal molecules in the liquid crystal layer are initially aligned without an alignment film, it means that the liquid crystal molecules can be arranged in a predetermined alignment direction while it is unnecessary to provide any alignment film. In a possible embodiment of the present disclosure, in order to ensure a normal display function of the display panel and prevent the first polarizer inside the liquid crystal cell from being disabled during manufacture by setting no alignment film, the liquid crystal molecules in the liquid crystal layer may be initially aligned through an optical alignment process or arranged freely (i.e., the liquid crystal molecules are not subjected to any alignment treatment, and the liquid crystal molecules are arranged in a nature state). Types of liquid crystals will not be particularly defined herein, as long as the above requirement is met. In a possible embodiment of the present disclosure, the liquid crystals containing reactive Mesogen liquid crystals and capable of optical alignment treatment may be adopted, or liquid crystal nanocapsules for which no alignment treatment is required may be adopted.
In a possible embodiment of the present disclosure, as shown in
For a better understanding of the present disclosure, an optical alignment procedure of the liquid crystals containing the RM liquid crystals will be described hereinafter. As shown in
In a possible embodiment of the present disclosure, as shown in
In a possible embodiment of the present disclosure, each liquid crystal nanocapsule includes a wall and liquid crystals surrounded by the wall. Usually, the wall may be made of a polymer, and it may be of a single-layered or multi-layered structure. The liquid crystal nanocapsule may refer to a liquid crystal capsule having a nanoscale particle size. Types of the liquid crystal nanocapsules will not be particularly defined herein, as long as the above-mentioned technical effect may be achieved.
In a possible embodiment of the present disclosure, in order to achieve a better display effect, each liquid crystal nanocapsule may have a particle size of 100 to 200 nm. The liquid crystal nanocapsule with a relatively small particle size has relatively high optical efficiency, so it is able to effectively improve a dark state of the display panel and provide a high contrast (CR). In addition, the smaller the particle size, the better the effect.
A voltage application mode of the liquid crystal nanocapsules will not be particularly defined herein, as long as the deflection direction of the liquid crystal molecules may be adjusted effectively. In a possible embodiment of the present disclosure, as shown in
In a possible embodiment of the present disclosure, as shown in
Of course, the above arrangement mode of the electrodes is for illustrative purposes only, but shall not be used to limit the scope of the present disclosure. Actually, any arrangement mode of the electrodes shall fall within the scope of the present disclosure, as long as the deflection direction of the liquid crystal molecules in the liquid crystal nanocapsules may be adjusted.
Types of the first substrate and the second substrate will not be particularly defined herein. In a possible embodiment of the present disclosure, the first substrate and the second substrate may each be a metal substrate, a polymer substrate or a glass substrate which are widely available and have good performance.
In a possible embodiment of the present disclosure, a TFT array may be arranged on a surface of the second substrate adjacent to the liquid crystal layer. Types of TFTs will not be particularly defined herein and can be selected freely by those skilled in the art depending upon practical requirements.
In a possible embodiment of the present disclosure, in order to further improve the display effect and provide a thin and light product, the first polarizer may have a thickness of 100 nm to 20 μm, e.g., 500 nm, 800 nm, 1 nm, 5 μm, 10 μm or 15 μm. Through the first polarizer having the mentioned thickness, it is able to meet the requirement of display and reduce a distance between a color filter layer and the second substrate, thereby to further alleviate the color crosstalk.
Types of the first polarizer will not be particularly defined herein. In a possible embodiment of the present disclosure, the first polarizer may be an attached polarizer, a coated polarizer or a wire grid polarizer. To be specific, the attached polarizer refers to a conventional polarizer, e.g., the aforementioned iodine-containing or dye-containing polarizer, capable of being attached at a predetermined position. The coated polarizer refers to a polarizer formed by directly coating an organic material having a polarization property at a predetermined position, and types of the organic material will not be particularly defined herein. The wire grid polarizer refers to a wire grid having a grating space far less than an optical wavelength. Such parameters as a material of the wire grid polarizer and the grating space may be selected according to the practical need.
In a possible embodiment of the present disclosure, as shown in
In a possible embodiment of the present disclosure, as shown in
In a possible embodiment of the present disclosure, as shown in
In a possible embodiment of the present disclosure, in order to achieve a color display function, the display panel may include subpixels in different colors. Correspondingly, the plurality of color filter sheets may be in different colors, e.g., the plurality of color filter sheets may include red color filter sheets, green color filter sheets and blue color filter sheets, or include red color filter sheets, green color filter sheets, blue color filter sheets and transparent sheets, or include red color filter sheets, green color filter sheets, blue color filter sheets and yellow color filter sheets. Each color filter sheet may be arranged in a subpixel opening in a same color. In addition, an arrangement mode of the color filter sheets in different colors will not be particularly defined herein. For example, the color filter sheets may be arranged in a like manner as conventional display panel, e.g., columns of the red color filter sheets, green color filter sheets and blue color filter sheets may be arranged periodically.
Taking a three-primary-color display panel as an example, as shown in
When a blue backlight is adopted, no blue color filter sheet may be arranged in each blue pixel opening. To be specific, as shown in
A material of the black matrix will not be particularly defined herein and can be selected freely by those skilled in the art depending upon practical requirements. In a possible embodiment of the present disclosure, the black matrix may be made of a material including, but not limited to, eriochrome black, carbon black, mixed metals, or a resin material such as a black photoresist which are widely available and have good performance. In addition, as shown in
A material of the overcoat will not be particularly defined herein and can be selected freely by those skilled in the art depending upon practical requirements. In a possible embodiment of the present disclosure, the overcoat may be made of a passivation material, including, but not limited to, an optical adhesive (e.g., a silicone adhesive, acrylic resin, unsaturated polyester, polyurethane, or epoxy resin), or Silicon-On-Glass (SOG) which are widely available and have good performance.
The present disclosure further provides in some embodiments a display device including the above-mentioned display panel. As mentioned above, it is able to prevent the occurrence of color crosstalk for the display device, thereby to improve the quality of the display device and increase the market competitiveness thereof. The features and advantages of the display device may refer to those of the display panel, and thus will not be particularly defined herein.
In a possible embodiment of the present disclosure, as shown in
Types of the display device will not be particularly defined herein. To be specific, the display device may be any known device having a display function, e.g., mobile phone, flat-panel computer, computer, game machine, television, display, wearable device or any other household appliances having a display function.
Of course, it should be appreciated that, apart from the above-mentioned display panel, the display device may further include any necessary structures and members of a conventional display device. Taking the mobile phone as an example, apart from the display panel, it may further include a touch panel, a housing, a Central Processing Unit (CPU), a camera module, a fingerprint identification module, and a voice processing system, which will not be particularly defined herein.
The present disclosure further provides in some embodiments a method for manufacturing a display panel which, as shown in
Step S100: forming a first polarizer on one surface of a first substrate. A process for forming the first polarizer will not be particularly defined herein. In addition, a material and a thickness of the first polarizer may refer to those mentioned hereinabove, and thus will not be particularly defined.
Step S200: arranging the first substrate and the second substrate oppositely to form a cell. No alignment film is arranged on a surface of the first polarizer adjacent to a liquid crystal layer and a surface of the second substrate adjacent to the liquid crystal layer.
In the embodiments of the present disclosure, Step S200 includes forming the cell through the first substrate and the second substrate, and injecting liquid crystals between the first substrate and the second substrate. Step S200 may be implemented through any known conventional process, e.g., a spacer scattering process, a spacer fixation process, or a seal and silver paste coating process.
It is found that, the above method is simple and mature, and capable of being adopted for industrial production. In addition, it is able to prevent the occurrence of color crosstalk for the display panel manufactured by the method, thereby to improve the display effect.
The method may be adopted to manufacture the aforementioned quantum-dot display panel. The implementations of the structures and members, e.g., the array substrate, the color filter substrate, the quantum-dot color filter sheets and the first polarizer, may refer to those mentioned above, and thus will not be particularly defined herein.
In a possible embodiment of the present disclosure, subsequent to forming the first polarizer and prior to arranging the first substrate and the second substrate oppositely to form a cell, the method further includes forming a first ultraviolet filter film on a surface of the first polarizer away from the first substrate and forming a second ultraviolet filter film on a surface of the second substrate adjacent to the first substrate. In this way, it is unnecessary to perform any high-temperature treatment during the manufacture. In addition, the ultraviolet filter films may serve as the alignment films, so it is able to provide the first polarizer inside the liquid crystal cell, thereby to alleviate the color crosstalk.
The display panel manufactured by the method may have a same structure as that mentioned above. The structures of the first substrate, the second substrate, the first polarizer, the liquid crystal layer, the second polarizer, the color filter layer, the black matrix and the ultraviolet filter films may refer to those mentioned above, and any known processes may be adopted for the formation of these members.
It should be appreciated that, such words as “central”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “on”, “under”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “radial”, “axial” and “circumferential” are used to indicate directions or positions as viewed in the drawings, and they are merely used to facilitate the description in the present disclosure, rather than to indicate or imply that a device or member must be arranged or operated at a specific position.
In addition, such words as “first” and “second” are merely used to differentiate different components rather than to represent any order, number or importance, i.e., they are used to implicitly or explicitly indicate that there is at least one component. Further, such a phrase as “a plurality of” is used to indicate that there are at least two, e.g., two or three, components, unless otherwise specified.
Unless otherwise specified, such words as “arrange” and “connect” may have a general meaning, e.g., the word “connect” may refer to fixed connection, removable connection or integral connection, or mechanical or electrical connection, or direct connection or indirect connection via an intermediate component, or communication between two components, or wired or wireless communication connection. The meanings of these words may be understood by a person skilled in the art in accordance with the practical need.
Unless otherwise defined, when a first feature is arranged on or under a second feature, it means that the first feature is in direct contact with the second feature, or in contact with the second feature via an intermediate component. In addition, when the first feature is arranged above the second feature, it means that the first feature is arranged right above or angularly above the second feature, or the first feature is at a level higher than the second feature. When the first feature is arranged below the second feature, it means that the first feature is arranged right below or angularly below the second feature, or the first feature is at a level lower than the second feature.
Such phrases as “one embodiment”, “embodiments”, “examples” and “for example” intend to indicate that the features, structures or materials are contained in at least one embodiment or example of the present disclosure, rather than referring to an identical embodiment or example. In addition, the features, structures or materials may be combined in any embodiment or embodiments in an appropriate manner. In the case of no conflict, the embodiments or examples or the features therein may be combined in any form.
The above embodiments are for illustrative purposes only, but the present disclosure is not limited thereto. Obviously, a person skilled in the art may make further modifications and improvements without departing from the spirit of the present disclosure, and these modifications and improvements shall also fall within the scope of the present disclosure.
Number | Date | Country | Kind |
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201810141989.6 | Feb 2018 | CN | national |