CN108287423B - Curved surface liquid crystal display - Google Patents
Curved surface liquid crystal display Download PDFInfo
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- CN108287423B CN108287423B CN201810055000.XA CN201810055000A CN108287423B CN 108287423 B CN108287423 B CN 108287423B CN 201810055000 A CN201810055000 A CN 201810055000A CN 108287423 B CN108287423 B CN 108287423B
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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
- G02F1/133305—Flexible substrates, e.g. plastics, organic film
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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
- G02F1/1323—Arrangements for providing a switchable viewing angle
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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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
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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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133314—Back frames
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Abstract
The invention discloses a curved-surface liquid crystal display screen which comprises an upper cover plate, a TFT (thin film transistor) module, a lower cover plate and a backlight plate, wherein the upper cover plate, the TFT module and the lower cover plate are sequentially attached from bottom to bottom; the TFT module comprises a planar polaroid, a liquid crystal box and a bottom polaroid, wherein the planar 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 glass substrate, a liquid crystal layer and a bottom glass substrate, wherein the surface polaroid is attached above the surface glass substrate, a color filter film is arranged on the inner side surface of the surface glass substrate, the bottom polaroid is attached to the lower surface of the bottom glass substrate, and a pixel electrode is arranged on the inner side surface of the bottom glass substrate; the liquid crystal layer is arranged between the color filter film and the pixel electrode. The curved liquid crystal display screen provided by the invention has the characteristics of high uniformity, high contrast and wide viewing angle.
Description
Technical Field
The invention relates to the field of liquid crystal display screens, in particular to a curved surface 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, and is popular with consumers, but the TFT liquid crystal display is only used in high-end consumer electronics products due to the complex manufacturing process and high cost.
A conventional TFT liquid crystal display is mostly of a flat panel type, and a curved display is used for a display screen such as a TV to prevent distortion and glare of a screen. However, the current TFT liquid crystal display with a curved surface still has some defects in display effect, for example, when viewing angles are observed from different directions, there is a serious light leakage phenomenon at some viewing angles, uniformity and contrast ratio will be poor, the display effect of the liquid crystal display is seriously affected, and bad use experience is brought to consumers.
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 curved liquid crystal display panel with high uniformity and contrast.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
a curved liquid crystal display screen comprises an upper cover plate, a TFT module, a lower cover plate and a backlight plate which are sequentially attached from top to bottom, wherein the upper cover plate, the TFT module and the lower cover plate are respectively bent to preset radians, the upper surface of the backlight plate is a curved surface, and the radian is consistent with the preset radian;
the TFT module comprises a planar polarizer, a liquid crystal box and a bottom polarizer, wherein 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 glass substrate, a liquid crystal layer and a bottom glass substrate, wherein the surface polaroid is attached above the surface glass substrate, a color filter film is arranged on the inner side surface of the surface glass substrate, the bottom polaroid is attached to the lower surface of the bottom glass substrate, and a pixel electrode is arranged on the inner side surface of the bottom 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 condensing film layer and the base layer are stacked in the backlight outer frame from top to bottom.
As an improvement of the scheme, the upper cover plate and the TFT module and the lower cover plate and the TFT module are attached through OCR or OCA.
In an improvement of the above aspect, the thickness of the face glass substrate is less than or equal to 0.2mm, and the thickness of the base 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 upper layer of the cellulose triacetate is coated with a hardened layer; and/or the presence of a gas in the gas,
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 optical compensation film is arranged on the outermost layer.
As a modification of the above, the hardening layer includes an antireflection coating and an antiglare coating.
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 curved surface liquid crystal display screen provided by the embodiment of the invention has the beneficial effects that:
the upper cover plate, the TFT module and the lower cover plate which are sequentially attached from top to bottom are respectively bent to preset radians, and the upper surface of the backlight plate attached to the lower cover plate is a curved surface, and the radians are consistent with the preset radians, so that the sandwich design formed by the upper cover plate, the TFT module, the lower cover plate and the backlight plate which are sequentially attached from bottom to bottom effectively improves the uniformity of the display screen; the readability of the liquid crystal display screen in a strong light environment is improved by adding the anti-glare coating and the anti-reflection coating on the surface polarizer; 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 curved liquid crystal display screen provided by the embodiment of the invention has excellent performances of high uniformity, 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 a curved-surface 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 a curved-surface liquid crystal display panel according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a pixel electrode design of a curved-surface liquid crystal display panel according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a planar polarizer of a curved liquid crystal display panel according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a bottom polarizer of a curved-surface liquid crystal display panel according to an embodiment of the present invention;
fig. 6 is a schematic view of a backlight plate structure of a curved-surface liquid crystal display panel according to an embodiment of the present invention;
fig. 7 is a comparison graph of a viewing angle test chart of a curved-surface liquid crystal display screen provided in an embodiment of the present invention and a current general technology.
Reference numerals: 101. an upper cover plate; 100. a TFT module; 102. a lower cover plate; 200. a backlight plate; 201. a backlight panel upper surface; 1. a surface polarizer; 2. a face glass substrate; 3. a color filter film; 4. a liquid crystal layer; 5. a pixel electrode; 6. a bottom 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. an anti-reflective coating; 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.
The embodiment of the invention provides a curved liquid crystal display screen, which can realize curved surface display by using a TFT technology without damaging the picture quality, and aims to solve the technical problems that when the curved surface display is realized by using the TFT technology, a very serious light leakage phenomenon occurs, so that the uniformity and the contrast are deteriorated, and the display effect of a liquid crystal display is seriously influenced.
As shown in fig. 1, the present embodiment provides a curved-surface liquid crystal display screen, which includes an upper cover plate 101, a TFT module 100, a lower cover plate 102, and a backlight plate 200 sequentially attached from top to bottom, where the upper cover plate 101, the TFT module 100, and the lower cover plate 102 are respectively bent to predetermined radians, and an upper surface 201 of the backlight plate 200 is a curved surface and the radian is consistent with the predetermined radians (the predetermined radian value range of the present embodiment is 2-6 degrees). The upper cover plate 101 and the TFT module 100, and the lower cover plate 102 and the TFT module 100 are attached to each other by OCR or OCA. The backlight 200 provides uniform and high-brightness incident light sources to each region of the liquid crystal display. According to the embodiment of the invention, the uniformity of the display screen can be further improved by adopting a sandwich design with the same radian formed by the upper cover plate, the TFT module, the lower cover plate and the backlight plate which are sequentially attached from bottom to bottom.
Referring to fig. 2, the TFT module 100 includes a planar polarizer 1, a liquid crystal cell, and a bottom polarizer 7, wherein the planar polarizer 1 is attached to an upper surface of the liquid crystal cell, and the planar polarizer 1 has anti-glare and anti-reflection functions, which can improve readability of a display screen 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 glass substrate 2, a liquid crystal layer 4 and a bottom glass substrate 6, the surface polarizer 1 is attached above the surface glass substrate 2, a bottom polarizer 7 is attached to the lower surface of the bottom glass substrate 6, an angle between an absorption axis of the surface polarizer 1 and a direction of the pixel electrode 5 is less than 45 °, in this embodiment, an angle between the absorption axis of the surface polarizer 1 and the direction of the pixel electrode 5 is 30 °, and the absorption axis is parallel to a long axis direction of liquid crystal molecules under a non-energized condition. 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 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.
In the present embodiment, the thickness of the face glass substrate 2 is 0.2mm or less, and the thickness of the base glass substrate 6 is 0.2mm or less.
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 hardened layer (including an anti-reflection coating layer 14 and an anti-glare coating layer 15), cellulose Triacetate (TAC)16, and polyvinyl alcohol (PVA) 17; the antireflection coating 14 and the antiglare coating 15 are coated on the upper surface of the upper layer of cellulose Triacetate (TAC)16, and a polyvinyl alcohol (PVA)17 is adhered between the lower part of the upper layer of cellulose Triacetate (TAC)16 and the upper part of the lower layer of cellulose Triacetate (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 anti-reflection coating 14 are to enable the display screen to observe a clear display effect even under a strong light irradiation environment, and improve the readability of the liquid crystal display screen under the strong light environment.
Referring to fig. 5, 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 middle 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 refractive index of the optical compensation film 18 in the z-axis direction 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. 6, 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 curved 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 a liquid crystal box and the planar polarizer 1, and the liquid crystal display screen can observe a clear display effect in a strong light environment by adding the anti-reflection coating 14 and the anti-glare coating 15 on the surface of the planar polarizer 1.
It should be noted that the upper and lower surfaces of each of the film layers of the TFT module 100 shown in fig. 2, the surface polarizer 1 shown in fig. 4, the bottom polarizer 7 shown in fig. 5, and the backlight panel 200 shown in fig. 6 are curved surfaces and have the same curvature.
As shown in fig. 7, d is a view angle test chart of the embodiment of the invention, each of the concentric circles in the four graphs of fig. 7 represents a view angle, and the circle with larger diameter represents a larger view angle; the right hand value in fig. 7 represents contrast, 1000 represents 1000: 1,500 represents 500:1, and so on. As can be seen from fig. 7, 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 current general technology, the light rays with the same wavelength of the curved liquid crystal display screen provided by the embodiment of the invention have the viewing angle of more than 40 degrees, and the viewing angles of the light rays with partial wavelengths in other general technologies exceed less than 40 degrees. Therefore, compared with the current general technology, the curved liquid crystal display screen provided by the embodiment of the invention has a wider viewing angle; meanwhile, as can be seen from the contrast value on the right side in fig. 7, the uniformity and the contrast of the curved-surface liquid crystal display screen provided by the embodiment of the invention are higher than those 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 curved-surface liquid crystal display screen provided by the embodiment of the invention is. Namely, the curved liquid crystal display screen provided by the embodiment of the invention can realize the liquid crystal display screen with excellent performances such as high uniformity, high contrast, wide viewing angle, anti-glare and anti-reflection.
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 (10)
1. A curved liquid crystal display screen is characterized by comprising an upper cover plate, a TFT module, a lower cover plate and a backlight plate which are sequentially attached from top to bottom, wherein the upper cover plate, the TFT module and the lower cover plate are respectively bent to preset radians, the upper surface of the backlight plate is a curved surface, and the radian is consistent with the preset radians;
the TFT module comprises a planar polarizer, a liquid crystal box and a bottom polarizer, wherein 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 glass substrate, a liquid crystal layer and a bottom glass substrate, wherein the surface polaroid is attached above the surface glass substrate, a color filter film is arranged on the inner side surface of the surface glass substrate, the bottom polaroid is attached to the lower surface of the bottom glass substrate, and a pixel electrode is arranged on the inner side surface of the bottom 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 bottom polaroid comprises an optical compensation film, and the optical compensation film is matched with the optical path difference value of the liquid crystal layer;
the arrangement direction of the grid bars of the pixel electrode is consistent with the arrangement direction of the liquid crystal molecules in the liquid crystal box, and the pixel electrode is also provided
Setting the position in the horizontal direction; under the condition of electrifying, the horizontal transverse grid-shaped design can ensure that the liquid crystal molecules are twisted and arranged in the 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, so that the incident polarized light can be changed
The polarization state makes the light pass through the surface polarizer to form bright display.
2. The curved liquid crystal display screen of claim 1, wherein the upper cover plate and the TFT module, and the lower cover plate and the TFT module are attached by OCR or OCA.
3. The curved liquid crystal display panel of claim 1, wherein the thickness of the face glass substrate is less than or equal to 0.2mm, and the thickness of the bottom glass substrate is less than or equal to 0.2 mm.
4. The curved liquid crystal display of claim 1, wherein the 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 upper layer of the cellulose triacetate is coated with a hardened layer;
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.
5. The curved liquid crystal display panel of claim 1, wherein the color filter is designed with a low retardation, and the design value of retardation is set to be less than 3 nm; the retardation of the liquid crystal layer is set to be 300-370 nm.
6. The curved liquid crystal display panel of claim 1, wherein the absorption axis of the planar polarizer makes an angle of less than 45 ° with the direction of the pixel electrode 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 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.
7. The curved liquid crystal display panel of claim 1, wherein the optical compensation film has an optical compensation value of 270nm and a z-axis refractive index of 0.5.
8. The curved liquid crystal display panel of claim 1, wherein the light-focusing film layer comprises a reflection type polarization brightness enhancement film and an ultra-micro distance multi-crystal structure brightness enhancement film, and the reflection type polarization brightness enhancement film and the ultra-micro distance multi-crystal 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.
9. The curved liquid crystal display panel of claim 8, wherein the axis of the MMG 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.
10. The curved liquid crystal display panel of claim 8, wherein 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 disposed under the ultra-fine pitch multi-crystalline structure brightness enhancement film from top to bottom, and the light emitting diode is disposed on one side of or right under the light guide plate.
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| CN201810055000.XA CN108287423B (en) | 2018-01-19 | 2018-01-19 | Curved surface liquid crystal display |
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| CN201810055000.XA CN108287423B (en) | 2018-01-19 | 2018-01-19 | Curved surface liquid crystal display |
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| CN108287423B true CN108287423B (en) | 2020-01-03 |
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| CN109215510A (en) * | 2018-10-09 | 2019-01-15 | 武汉华星光电技术有限公司 | Flexible display apparatus and its backlight module |
| CN112014917B (en) * | 2019-05-31 | 2022-07-15 | 北京小米移动软件有限公司 | Polaroid, display and terminal |
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| JP2009192793A (en) * | 2008-02-14 | 2009-08-27 | Seiko Instruments Inc | Liquid crystal display device |
| JP2010107857A (en) * | 2008-10-31 | 2010-05-13 | Hitachi Displays Ltd | Liquid crystal display device |
| CN103033977B (en) * | 2012-12-14 | 2015-08-12 | 京东方科技集团股份有限公司 | Liquid crystal indicator |
| CN103267994B (en) * | 2013-05-22 | 2015-06-17 | 深圳市华星光电技术有限公司 | Polarizing component, liquid crystal display device and manufacturing method of polarizing component |
| CN104777696A (en) * | 2015-05-08 | 2015-07-15 | 京东方科技集团股份有限公司 | Backlight module and display device |
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