CN109407371B - Anti-reflection thin liquid crystal display screen - Google Patents
Anti-reflection thin liquid crystal display screen Download PDFInfo
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- CN109407371B CN109407371B CN201810054999.6A CN201810054999A CN109407371B CN 109407371 B CN109407371 B CN 109407371B CN 201810054999 A CN201810054999 A CN 201810054999A CN 109407371 B CN109407371 B CN 109407371B
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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
- G02F1/133528—Polarisers
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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
- G02F1/133351—Manufacturing of individual cells out of a plurality of cells, e.g. by dicing
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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
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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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
- G02F1/13363—Birefringent elements, e.g. for optical compensation
Abstract
The invention discloses an anti-reflection thin liquid crystal display screen, which comprises a surface polaroid, a liquid crystal box, a bottom polaroid and a backlight plate, wherein the surface polaroid, the liquid crystal box, the bottom polaroid and the backlight plate are sequentially attached from bottom to bottom; the surface polaroid is arranged above the liquid crystal box, and the bottom polaroid is arranged below the liquid crystal box; the liquid crystal box comprises a surface ITO glass substrate, a liquid crystal layer and a bottom ITO glass substrate, wherein a surface polaroid is attached above the surface ITO glass substrate, a color filter film is arranged on the inner side surface of the surface ITO glass substrate, the bottom polaroid is attached to the lower surface of the bottom ITO glass substrate, and a pixel electrode is arranged on the inner side surface of the bottom ITO glass substrate; the liquid crystal layer is arranged between the color filter film and the pixel electrode; the upper surface of the surface polarizer is coated with an anti-reflection layer; the anti-reflection layer is an optical film with a submicron-order convex array on the surface; the thickness of the surface ITO glass substrate is less than or equal to 0.2mm, and the thickness of the bottom ITO glass substrate is less than or equal to 0.2 mm. The anti-reflection thin liquid crystal display screen provided by the invention has the characteristics of extremely low reflectivity, high brightness and readability under strong light.
Description
Technical Field
The invention relates to the field of liquid crystal display screens, in particular to an anti-reflection thin liquid crystal display screen.
Background
Through continuous development, the liquid crystal display can display various pictures with rich contents and bright color effects from the TN \ STN type liquid crystal display which can only display simple black-and-white character patterns to the current mainstream TFT type liquid crystal display.
With the popularization of the application of the liquid crystal display, the TFT liquid crystal display has fast response time and high image quality display effect, which is favored by consumers, but the thickness of the current curved TFT liquid crystal display is not thin enough, so that the light transmittance is poor; and the defect on the display effect exists, if when observing from different direction visual angles about from, there is serious light leak phenomenon at some visual angles, and degree of consistency and contrast ratio can worsen, seriously influences LCD's display effect, brings not good use experience for the consumer.
Disclosure of Invention
In view of the deficiencies of the prior art, it is an object of embodiments of the present invention to provide a thin anti-reflective liquid crystal display panel that can have a very low reflectivity.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
an anti-reflection thin liquid crystal display screen comprises a surface polaroid, a liquid crystal box, a bottom polaroid and a backlight plate which are sequentially attached from bottom to bottom; the planar polarizer is arranged above the liquid crystal box, and the bottom polarizer is arranged below the liquid crystal box; the liquid crystal box comprises a surface ITO glass substrate, a liquid crystal layer and a bottom ITO glass substrate, wherein a surface polaroid is attached above the surface ITO glass substrate, a color filter film is arranged on the inner side surface of the surface ITO glass substrate, the bottom polaroid is attached to the lower surface of the bottom ITO glass substrate, and a pixel electrode is arranged on the inner side surface of the bottom ITO glass substrate; the liquid crystal layer is arranged between the color filter film and the pixel electrode; the backlight plate comprises a light-gathering film layer, a base layer and a backlight outer frame; wherein the light-gathering film layer and the base layer are stacked in the backlight outer frame from top to bottom; the upper surface of the surface polarizer is coated with an anti-reflection layer (preferably a moth-eye film); the anti-reflection layer is an optical film with a submicron-order projection array on the surface; the thickness of the surface ITO glass substrate is less than or equal to 0.2mm, and the thickness of the bottom ITO glass substrate is less than or equal to 0.2 mm.
As an improvement of the above scheme, the surface polarizer comprises two layers of cellulose triacetate and polyvinyl alcohol; the polyvinyl alcohol is arranged between the two layers of the cellulose triacetate, and the upper surface of the cellulose triacetate on the upper layer is coated with a low-reflection layer; and the number of the first and second groups,
the bottom polarizer comprises two layers of cellulose triacetate, polyvinyl alcohol and an optical compensation film, the polyvinyl alcohol is arranged between the two layers of cellulose triacetate, and the outermost layer is the optical compensation film.
As an improvement of the above scheme, the color filter film adopts a low retardation design, and the design value of the retardation is set to be less than 3 nm; the retardation of the liquid crystal layer is set to be 300-370 nm;
the pixel electrode is of a horizontal transverse grid-bar structure, and the grid bar arrangement direction of the pixel electrode is consistent with the arrangement direction of liquid crystal molecules in the liquid crystal box.
As an improvement of the above scheme, the light absorption axis of the planar polarizer forms an angle of less than 45 degrees with the direction of the pixel electrode and is parallel to the long axis direction of the liquid crystal molecules under the non-energized condition; the light absorption axis of the bottom polarizer and the direction of the pixel electrode form an angle larger than 45 degrees and is vertical to the long axis direction of the liquid crystal molecules under the non-electrified condition.
As a modification of the above, the optical compensation value of the optical compensation film is set to 270nm, and the z-axis direction refractive index of the optical compensation film is set to Nz of 0.5.
As an improvement of the above scheme, the light-gathering film layer comprises a reflection type polarized light brightness enhancement film and an ultra-micro distance polycrystalline structure brightness enhancement film, and the reflection type polarized light brightness enhancement film and the ultra-micro distance polycrystalline structure brightness enhancement film are sequentially arranged above the base layer from top to bottom; and the transmission axis of the reflection type polarized light brightness enhancement film is parallel to the transmission axis of the bottom polarizer.
As an improvement of the above scheme, if the display screen is in a horizontal screen mode, the axis of the ultra-micro distance polycrystalline structure brightness enhancement film is parallel to the long edge of the display screen; and if the display screen is in a vertical screen mode, the axis of the ultra-micro distance polycrystalline structure brightness enhancement film is parallel to the short edge of the display screen.
As an improvement of the above scheme, the base layer comprises a light emitting diode, a light guide plate and a diffusion film, the diffusion film and the light guide plate are sequentially arranged below the super-micro distance polycrystalline structure brightening film from top to bottom, and the light emitting diode is arranged on one side of the light guide plate.
The anti-reflection thin liquid crystal display screen provided by the embodiment of the invention has the beneficial effects that:
through the thickness of a liquid crystal box formed by the control surface ITO glass substrate, the liquid crystal layer and the bottom ITO glass substrate, the surface ITO glass substrate and the bottom ITO glass substrate are subjected to special-shaped cutting, so that the thickness of the cut surface ITO glass substrate is less than or equal to 0.2mm, and the thickness of the bottom ITO glass substrate is less than or equal to 0.2mm, and the whole display screen is thinner and more transparent. In addition, the moth-eye film with the submicron-order protrusion array on the surface is additionally arranged on the surface polarizer, so that the reflection of the surface of the display screen can be effectively reduced, the display content can be clearly observed in a strong light environment, and the readability of the liquid crystal display screen in the strong light environment is improved; meanwhile, the compensation value of the optical compensation film in the bottom polarizer is optimized and matched with the optical path difference value of the liquid crystal layer, so that the visual angles of the liquid crystal display screen in different visual angle directions are improved; and adding a combination of a super-micro distance polycrystalline structure Brightness Enhancement Film (BEF) and a reflection type polarized brightness enhancement film (DBEF) to the backlight plate to improve the surface brightness of the backlight plate. The anti-reflection thin liquid crystal display screen provided by the embodiment of the invention has excellent performances of extremely low reflectivity, high brightness, readability under strong light, high contrast, wide viewing angle and the like, so that the competitiveness of products in the market is improved.
Drawings
Fig. 1 is a schematic view of an overall structure of an anti-reflection thin liquid crystal display panel according to an embodiment of the present invention;
FIG. 2 is a schematic view of a liquid crystal cell structure of an anti-reflective thin liquid crystal display panel according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a pixel electrode design of an anti-reflective thin LCD panel according to an embodiment of the present invention;
FIG. 4 is a schematic view of a structure of a planar polarizer of an anti-reflective thin liquid crystal display panel according to an embodiment of the present invention;
FIGS. 5(a) -5 (b) are schematic diagrams showing a comparison of a front polarizer of an anti-reflection thin type liquid crystal display panel according to the prior art and an embodiment of the present invention;
FIG. 6 is a schematic view of a bottom polarizer structure of an anti-reflective thin LCD panel according to an embodiment of the present invention;
fig. 7 is a schematic view of a backlight plate structure of an anti-reflective thin lcd panel according to an embodiment of the present invention;
fig. 8 is a comparison graph of a viewing angle test chart of an anti-reflection thin type liquid crystal display panel according to an embodiment of the present invention and a current general technology.
Reference numerals: 100. a liquid crystal cell; 200. a backlight plate; 1. a surface polarizer; 2. a face ITO glass substrate; 3. a color filter film; 4. a liquid crystal layer; 5. a pixel electrode; 6. a bottom ITO glass substrate; 7. a bottom polarizer; 8. a reflective polarized brightness enhancement film (DBEF); 9. ultra-micro distance polycrystalline structure Brightness Enhancement Film (BEF); 10. a diffusion membrane; 11. a light emitting diode; 12. a backlight outer frame; 13. a light guide plate; 14. moth eye membrane; 15. an anti-glare coating; 16. cellulose Triacetate (TAC); 17. polyvinyl alcohol (PVA); 18. an optical compensation film.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
As shown in fig. 1, the present embodiment provides an anti-reflection thin liquid crystal display panel, which includes a surface polarizer 1, a liquid crystal cell 100, a bottom polarizer 7 and a backlight panel 200 sequentially attached from bottom to bottom, wherein the surface polarizer 1 is attached to the upper surface of the liquid crystal cell 100, and the surface polarizer 1 has anti-glare and anti-reflection functions, so as to improve the readability of the display panel in a strong light environment; the bottom polarizer 7 is attached to the lower surface of the liquid crystal cell to control the polarization direction of the bottom incident light.
Specifically, as shown in fig. 2, the liquid crystal cell includes a surface ITO glass substrate 2, a liquid crystal layer 4, and a bottom ITO glass substrate 6, wherein the surface polarizer 1 is attached above the surface ITO glass substrate 2, and a bottom polarizer 7 is attached to the lower surface of the bottom ITO glass substrate 6. Wherein, the upper surface of the surface polarizer 1 is coated with an anti-reflection layer, and the anti-reflection layer is preferably a moth-eye film 14 (refer to fig. 4); the moth-eye film 14 is an optical film with a submicron-order protrusion array on the surface. The thickness of the surface ITO glass substrate is less than or equal to 0.2mm, and the thickness of the bottom ITO glass substrate is less than or equal to 0.2 mm.
In the embodiment, the moth-eye film with the submicron-scale protrusion arrays on the surface is additionally arranged on the surface polarizer, so that the reflection of the surface of the display screen can be effectively reduced, the display content can be clearly observed in a highlight environment, the readability of the liquid crystal display screen in the highlight environment is improved, the surface ITO glass substrate 2 and the bottom ITO glass substrate 6 are subjected to special-shaped cutting by controlling the thickness of the liquid crystal box 100 formed by the surface ITO glass substrate 2, the liquid crystal layer 4 and the bottom ITO glass substrate 6, the thickness of the cut surface ITO glass substrate 2 is not more than 0.2mm, the thickness of the cut bottom ITO glass substrate 6 is not more than 0.2mm, and the whole display screen is thinner and more transparent.
Further, the light absorption axis of the planar polarizer 1 forms an angle smaller than 45 ° with the direction of the pixel electrode 5, and in this embodiment, the light absorption axis of the planar polarizer 1 forms an angle of 30 ° with the direction of the pixel electrode 5, and is parallel to the long axis direction of the liquid crystal molecules in the non-energized state. The light absorption axis of the bottom polarizer 7 forms an angle of more than 45 degrees with the direction of the pixel electrode 5, in this embodiment, the light absorption axis of the bottom polarizer 7 forms an angle of 60 degrees with the direction of the pixel electrode 5, and is perpendicular to the long axis direction of the liquid crystal molecules under the non-energized condition, the surface polarizer 1 and the bottom polarizer 7 are used for separating the light emitted by the backlight plate by polarized light components, one part of the polarized light components is used for enabling the light to pass through, and the other part of the polarized light components is used for hiding the light by absorption, reflection, scattering and other actions, so that the image effect is controlled by color separation, pressure.
The inner side surface of the surface ITO glass substrate 2 is provided with a color filter film 3, the color filter film 3 is used for accurately selecting light waves with a small-range waveband to be passed through and reflecting other wavebands which are not desired to be passed through, the color filter film 3 is designed by adopting a low retardation, the design value of the retardation is less than 3nm, and the design value of the retardation of the color filter film 3 in the embodiment is 2 nm.
As shown in fig. 3, the embodiment of the present invention is suitable for a liquid crystal display screen in an extraordinary light mode, where extraordinary light is light vibrating parallel to the optical axis, and thus the pixel electrode 5 is also arranged in the horizontal direction. Under the power-on condition, the horizontal transverse grid-shaped design can enable liquid crystal molecules to be twisted and arranged in a multi-domain direction, different included angles can be formed between the long axis direction of the liquid crystal molecules and the incident polarized light direction, and therefore the polarization state of the incident polarized light can be changed, and light can form bright-state display through the surface polarizer 1.
The liquid crystal layer 4 is disposed between the color filter film 3 and the pixel electrode 5, the retardation of the liquid crystal layer 4 is 300nm to 370nm, the retardation of the liquid crystal layer 4 in this embodiment is 330nm, and the viewing angle of the display screen can be greatly improved by matching with the optical compensation film 18 (refer to fig. 5) on the bottom polarizer 7.
As shown in fig. 4, the surface polarizer 1 includes a moth-eye film 14, an antiglare coating layer 15, cellulose Triacetate (TAC)16, and polyvinyl alcohol (PVA) 17; wherein the moth-eye film 14 and the anti-glare coating 15 are sequentially coated on the upper surface of the upper layer of the triacetyl cellulose (TAC)16, and a polyvinyl alcohol (PVA)17 is adhered between the lower part of the upper layer of the triacetyl cellulose (TAC)16 and the upper part of the lower layer of the triacetyl cellulose (TAC) 16. Wherein the absorption axis of the planar polarizer 1 makes an angle of less than 45 ° with the direction of the pixel electrode 5 and is parallel to the long axis direction of the liquid crystal molecules in the non-energized state, the absorption axis of the planar polarizer 1 makes an angle of 30 ° with the direction of the pixel electrode 5 in this embodiment. In addition, the main functions of the anti-glare coating 15 and the moth-eye film 14 are to enable the display screen to observe a clear display effect even in a strong light irradiation environment, and improve the readability of the liquid crystal display screen in the strong light environment.
In this embodiment, as shown in fig. 5(a) to 5(b), fig. 5(a) is a schematic diagram of emitted light formed by using a prior art planar polarizer. By adopting the planar polarizer 1 of the present embodiment, as shown in fig. 5(b), by adding the moth-eye film 14 having the submicron-sized protrusion array on the surface on the planar polarizer 1, the reflection (including the reflection of the external light and the light emitted by the backlight) on the surface of the display screen can be effectively reduced, so that the display content can be clearly observed in a strong light environment, and the readability of the liquid crystal display screen in the strong light environment is improved.
Referring to fig. 6, the bottom polarizer 7 includes two layers of cellulose Triacetate (TAC)16, polyvinyl alcohol (PVA)17, and an optical compensation film 18. The polyvinyl alcohol 17 is arranged between the two layers of cellulose triacetate 16, and the outermost layer is an optical compensation film 18. The light absorption axis of the bottom polarizer 7 forms an angle larger than 45 degrees with the direction of the pixel electrode 5 and is perpendicular to the long axis direction of the liquid crystal molecules under the non-energized condition, and the light absorption axis of the bottom polarizer 7 forms an angle of 60 degrees with the direction of the pixel electrode 5 in this embodiment.
The bottom polarizer 7 of this embodiment is a composite film, the scattered light source is changed into polarized light in a single direction after passing through the bottom polarizer 7, and the direction of the polarized light entering the liquid crystal cell can be changed by adjusting the angle of the polarizer. The outermost layer of the bottom polarizer 7 comprises a layer of optical compensation film 18, the optical compensation value of the optical compensation film 18 is set to be 270nm, and the z-axis direction refractive index of the optical compensation film 18 is set to be Nz-0.5; the compensation value of the optical compensation film 18 in the bottom polarizer 7 is optimized to match the optical path difference value of the liquid crystal layer 4, and the optical compensation value of the compensation film and the optical path difference value of the liquid crystal layer 4 in the liquid crystal box complement each other to widen the visual angle of the liquid crystal display screen in each direction.
Since the lcd panel itself does not emit light, it controls the transmission and non-transmission of light only by the rotation of the liquid crystal molecules, so that the human eye can see different patterns, the backlight 200 is required to provide an external light source for the lcd panel.
As shown in fig. 7, the backlight plate 200 includes a light condensing film layer, a backlight outer frame 12, and a base layer including light emitting diodes 11, a light guide plate 13, and a diffusion film 10; the light-gathering film layer comprises a reflection type polarized light brightness enhancement film (DBEF)8 and an ultra-micro distance polycrystalline structure Brightness Enhancement Film (BEF) 9; wherein, the reflection type polarized light brightness enhancement film (DBEF)8, the ultra-micro distance polycrystalline structure Brightness Enhancement Film (BEF)9, the diffusion film 10 and the light guide plate 13 are stacked in the backlight frame 12 from top to bottom, and the light emitting diode 11 is arranged at one side or right below the light guide plate 13. The ultra-micro distance polycrystalline structure Brightness Enhancement Film (BEF)9 has a light-gathering effect and can increase the surface brightness of the backlight by 60%. Compared with the traditional backlight plate, the backlight plate provided by the invention is additionally provided with the combination of the ultra-micro distance polycrystalline structure Brightness Enhancement Film (BEF)9 and the reflection type polarization brightness enhancement film (DBEF)8, and the same number of light-emitting diodes 11 are adopted to obtain higher surface brightness, so that the surface brightness of the liquid crystal display screen is correspondingly improved, and the excellent display effect can be realized.
The transmission axis of the reflection type polarized light brightness enhancement film (DBEF)8 is parallel to the transmission axis of the bottom polarizer 7. The backlight source is transmitted into the liquid crystal box along the transmission axis direction of the bottom polaroid 7, the brightness of incident light is increased, the surface brightness of the corresponding liquid crystal display screen is also increased, and the integral transmittance of the liquid crystal display screen is further improved.
The axis of the ultra-micro distance polycrystalline structure Brightness Enhancement Film (BEF) is related to the use condition, if the display screen is in a transverse screen mode, the axis of the ultra-micro distance polycrystalline structure Brightness Enhancement Film (BEF) is parallel to the long edge of the display screen, and if the display screen is in a vertical screen mode, the axis of the ultra-micro distance polycrystalline structure Brightness Enhancement Film (BEF) is parallel to the short edge of the display screen.
Wherein the light emitting diode 11 includes a light emitting diode of common YAG phosphor and a light emitting diode of RG phosphor.
The working principle of the anti-reflection thin liquid crystal display screen provided by the embodiment of the invention is as follows: the bottom polarizer 7 is a film compounded by multilayer materials, so that a scattered light source emitted by the bottom backlight plate is changed into polarized light in a single direction after passing through the bottom polarizer 7, and the scattered light source emitted by the bottom backlight plate forms polarized light in a preset direction after passing through the bottom polarizer 7 and enters the liquid crystal box. Wherein the optical compensation film 18 of the bottom polarizer 1 and the special pixel electrode 5 design in the liquid crystal box are used to improve the visual angle of each direction of the liquid crystal display screen. In addition, the combination of the ultra-micro distance polycrystalline structure Brightness Enhancement Film (BEF)9 and the reflection type polarized brightness enhancement film (DBEF)8 improves the light condensation effect and increases the surface brightness of the backlight. Polarized light in a preset direction passes through the liquid crystal box and the planar polarizer 1, and the moth-eye film 14 and the anti-glare coating 15 are additionally arranged on the surface of the planar polarizer 1, so that the liquid crystal display screen can observe a clear display effect in a strong light environment.
As shown in fig. 8, d is a view angle test chart of the embodiment of the invention, each of the concentric circles in the four charts of fig. 8 represents a view angle, and the circle with larger diameter represents a larger view angle; the right hand value in fig. 8 represents contrast, 1000 represents 1000: 1,500 represents 500:1, and so on. As can be seen from fig. 8, the a, b and c diagrams are the current general technologies, and as shown in the a, b and c diagrams, the viewing angle of the light with partial wavelength is less than 40 °; compared with the prior art, the light with the same wavelength of the anti-reflection thin liquid crystal display screen provided by the embodiment of the invention has the viewing angle of more than 40 degrees, and the viewing angles of the light with partial wavelengths in other general techniques exceed less than 40 degrees. Therefore, compared with the current general technology, the anti-reflection thin liquid crystal display screen provided by the embodiment of the invention has wider viewing angle; meanwhile, as can be seen from the contrast value on the right side in fig. 8, the contrast of the anti-reflection thin liquid crystal display screen provided by the embodiment of the present invention is higher than that of the current general technology, and the display screen has a higher brightness value by matching with the arrangement of the brightness enhancement film, so that the higher the contrast is, the richer the color gradation that can be displayed by the anti-reflection thin liquid crystal display screen provided by the embodiment of the present invention is. Namely, the anti-reflection thin liquid crystal display screen provided by the embodiment of the invention can realize the liquid crystal display screen with excellent performances such as high light transmittance, high contrast, wide viewing angle, anti-glare, anti-reflection and the like.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.
Claims (6)
1. An antireflection thin liquid crystal display screen is characterized by comprising a surface polarizer, a liquid crystal box, a bottom polarizer and a backlight plate which are sequentially attached from bottom to bottom; the planar polarizer is arranged above the liquid crystal box, and the bottom polarizer is arranged below the liquid crystal box; the liquid crystal box comprises a surface ITO glass substrate, a liquid crystal layer and a bottom ITO glass substrate, wherein a surface polaroid is attached above the surface ITO glass substrate, a color filter film is arranged on the inner side surface of the surface ITO glass substrate, the bottom polaroid is attached to the lower surface of the bottom ITO glass substrate, and a pixel electrode is arranged on the inner side surface of the bottom ITO glass substrate; the liquid crystal layer is arranged between the color filter film and the pixel electrode; the backlight plate comprises a light-gathering film layer, a base layer and a backlight outer frame; wherein the light-gathering film layer and the base layer are stacked in the backlight outer frame from top to bottom;
the upper surface of the surface polarizer is coated with an anti-reflection layer; the anti-reflection layer is a moth eye film; the moth eye film is an optical film with a submicron-order protrusion array on the surface;
the thickness of the surface ITO glass substrate is less than or equal to 0.2mm, and the thickness of the bottom ITO glass substrate is less than or equal to 0.2 mm;
the light-gathering film layer comprises a reflection type polarized light brightness enhancement film and an ultra-micro distance polycrystalline structure brightness enhancement film, and the reflection type polarized light brightness enhancement film and the ultra-micro distance polycrystalline structure brightness enhancement film are sequentially arranged above the base layer from top to bottom; the transmission axis of the reflection type polarized light brightness enhancement film is parallel to the transmission axis of the bottom polarizer;
the pixel electrode is of a horizontal transverse grid-bar-shaped structure, and the grid bar arrangement direction of the pixel electrode is consistent with the arrangement direction of liquid crystal molecules in a liquid crystal box; the light absorption axis of the surface polarizer forms an angle of less than 45 degrees with the direction of the pixel electrode and is parallel to the long axis direction of the liquid crystal molecules under the non-electrified condition;
the light absorption axis of the bottom polarizer and the direction of the pixel electrode form an angle larger than 45 degrees and is vertical to the long axis direction of the liquid crystal molecules under the non-electrified condition.
2. The anti-reflective thin liquid crystal display panel of claim 1, wherein said planar polarizer comprises two layers of cellulose triacetate and polyvinyl alcohol; the polyvinyl alcohol is arranged between the two layers of the cellulose triacetate, and the upper surface of the cellulose triacetate on the upper layer is coated with a low-reflection layer; and the bottom polaroid comprises two layers of cellulose triacetate, polyvinyl alcohol and an optical compensation film, the polyvinyl alcohol is arranged between the two layers of cellulose triacetate, and the optical compensation film is arranged on the outermost layer.
3. The antireflection thin liquid crystal display panel as described in claim 1, wherein the color filter is designed to have a low retardation, and the design value of the retardation is set to be less than 3 nm; the retardation of the liquid crystal layer is set to be 300-370 nm.
4. The antireflection thin liquid crystal display panel as described in claim 2, wherein an optical compensation value of said optical compensation film is 270nm, and a z-axis refractive index of said optical compensation film is 0.5.
5. The anti-reflective thin liquid crystal display panel of claim 1, wherein the axis of said ultra-fine pitch multi-crystal structure brightness enhancement film is parallel to the long side of the panel if the panel is in a landscape mode; and if the display screen is in a vertical screen mode, the axis of the ultra-micro distance polycrystalline structure brightness enhancement film is parallel to the short edge of the display screen.
6. The anti-reflective thin liquid crystal display panel of claim 1, wherein the base layer comprises a light emitting diode, a light guide plate and a diffuser film, the diffuser film and the light guide plate being sequentially disposed from top to bottom below the ultra-fine pitch multi-crystalline structure brightness enhancement film, the light emitting diode being disposed on one side of or directly below the light guide plate.
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