CN114253032A - Liquid crystal display device having a plurality of pixel electrodes - Google Patents

Liquid crystal display device having a plurality of pixel electrodes Download PDF

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Publication number
CN114253032A
CN114253032A CN202111580699.XA CN202111580699A CN114253032A CN 114253032 A CN114253032 A CN 114253032A CN 202111580699 A CN202111580699 A CN 202111580699A CN 114253032 A CN114253032 A CN 114253032A
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China
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blue light
liquid crystal
crystal display
display device
quantum dot
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Granted
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CN202111580699.XA
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CN114253032B (en
Inventor
林加翔
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Guangzhou China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Guangzhou China Star Optoelectronics Semiconductor Display Technology Co Ltd
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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
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • 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
    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
    • 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
    • G02F1/133624—Illuminating devices characterised by their spectral emissions

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Liquid Crystal (AREA)

Abstract

The application discloses a liquid crystal display device. The liquid crystal display device is provided with a frame area and comprises a liquid crystal display panel and a backlight module; the backlight module is arranged on the light incident side of the liquid crystal display panel and comprises a quantum dot film and a first prism sheet, the first prism sheet is positioned on one side, close to the liquid crystal display panel, of the quantum dot film, and a part, corresponding to the frame area, of the first prism sheet is doped with a first blue light absorption material. The application improves the blue edge phenomenon in the liquid crystal display device and can meet the design requirement of narrow-frame display products.

Description

Liquid crystal display device having a plurality of pixel electrodes
Technical Field
The application relates to the technical field of display, in particular to a liquid crystal display device.
Background
With the improvement of living standard of people, products with high color gamut are more and more pursued by consumers, and compared with an organic light emitting diode display module, the existing liquid crystal display module has a certain gap on the color gamut.
At present, in order to realize high color gamut display of a liquid crystal display product, a quantum dot technology is applied to a backlight module, namely, a quantum dot film is used in the backlight module, and the quantum dot film is excited under a blue light source to generate red light and green light, so that the red light and the green light are mixed into white light. However, the edge of the quantum dot film is vulnerable to the intrusion of external water and oxygen, so that the blue edge appears at the edge of the backlight module, and the quality of the display image is greatly affected. In the prior art, the blue edge is shielded in a mode of increasing the width of the black matrix in the panel, but the scheme is suitable for the design of a large-frame display product, so that the design requirement of a narrow-frame display product cannot be met.
Disclosure of Invention
The embodiment of the application provides a liquid crystal display device, which aims to improve the blue edge phenomenon in the liquid crystal display device and meet the design requirement of narrow-frame display products.
The embodiment of the application provides a liquid crystal display device, it has frame area, liquid crystal display device includes:
a liquid crystal display panel; and
the backlight module is arranged on the light incident side of the liquid crystal display panel and comprises a quantum dot film and a first prism sheet, the first prism sheet is positioned on one side, close to the liquid crystal display panel, of the quantum dot film, and a part, corresponding to the frame area, of the first prism sheet is doped with a first blue light absorption material.
Optionally, in some embodiments of the present application, the first prism sheet includes a first substrate layer and a first prism portion, the first prism portion is located on one side of the first substrate layer away from the quantum dot film and is located in the frame region, and the first blue light absorbing material is doped in the first prism portion.
Optionally, in some embodiments of the present application, the frame area includes an upper frame area, a first side frame area, a lower frame area, and a second side frame area that are sequentially connected end to end, and the first prism portion is located at least one of the upper frame area, the first side frame area, and the second side frame area.
Optionally, in some embodiments of the present application, the first prism portion is disposed in the upper frame area, the first side frame area, and the second side frame area.
Optionally, in some embodiments of the present application, the first blue light absorbing material is a high refractive particle having a refractive index of 1.65-1.68; and/or
The first blue light absorbing material includes one or more of zirconia, titania, and zinc sulfide.
Optionally, in some embodiments of the present application, the backlight module further includes a second prism sheet, the second prism sheet is located on a side of the first prism sheet away from the quantum dot film, and a portion of the second prism sheet corresponding to the frame region is doped with a second blue light absorbing material.
Optionally, in some embodiments of the present application, the backlight module further includes a first diffusion sheet and a blue light neutralizing portion, the first diffusion sheet is located between the first prism sheet and the quantum dot film, the blue light neutralizing portion covers a surface of the first diffusion sheet close to or far away from the quantum dot film, and the blue light neutralizing portion is located in the frame area and is disposed corresponding to the first prism portion.
Optionally, in some embodiments of the present application, the backlight module further includes a first diffusion sheet and a blue light neutralizing portion, the first diffusion sheet is located on one side of the first prism sheet, which is away from the quantum dot film, the blue light neutralizing portion covers a surface of the first diffusion sheet, which is close to or away from the quantum dot film, and the blue light neutralizing portion is located in the frame area and is disposed corresponding to the first prism portion.
Optionally, in some embodiments of the present application, the frame area includes an upper frame area, a first side frame area, a lower frame area, and a second side frame area that are sequentially connected end to end, and the blue light neutralization portion is disposed in at least one of the upper frame area, the first side frame area, and the second side frame area.
Optionally, in some embodiments of the present application, the material of the blue light neutralizing part includes yellow phosphor, yellow quantum dot, or ink doped with yellow dye; or
The material of the blue light neutralizing part comprises a mixture of red phosphor and green phosphor, a mixture of red quantum dots and green quantum dots, or an ink mixture doped with red dye and green dye.
Compared with the liquid crystal display device in the prior art, the liquid crystal display device provided by the application has the advantages that the first blue light absorption material is doped in the part, corresponding to the frame area, of the first prism sheet, so that when the blue light leaking from the edge of the quantum dot film enters the first prism sheet, the blue light can be absorbed by the first blue light absorption material in the first prism sheet, the blue light leaking from the edge of the backlight module can be weakened, and the blue edge phenomenon of the liquid crystal display device can be weakened. Therefore, in the design of display products, the blue edge does not need to be shielded in a mode of enlarging the width of the black matrix in the panel, and the design requirement of narrow-frame display products can be met.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic plan view of a liquid crystal display device according to a first embodiment of the present application.
Fig. 2 is a schematic cross-sectional structure diagram of a liquid crystal display device according to a first embodiment of the present application.
Fig. 3 is a schematic plan view illustrating a first prism sheet of a liquid crystal display device according to a first embodiment of the present disclosure.
Fig. 4 is a schematic cross-sectional structure of the first prism sheet shown in fig. 3 along a section line a-a'.
Fig. 5 is a schematic cross-sectional structure diagram of a liquid crystal display device according to a second embodiment of the present application.
Fig. 6 is a schematic cross-sectional structure diagram of a liquid crystal display device according to a third embodiment of the present application.
Fig. 7 is a schematic cross-sectional structure view of the second prism sheet shown in fig. 6.
Fig. 8 is a schematic cross-sectional view of a liquid crystal display device according to a fourth embodiment of the present application.
Fig. 9 is a schematic cross-sectional view of a liquid crystal display device according to a fifth embodiment of the present application.
Fig. 10 is a schematic cross-sectional view of a liquid crystal display device according to a sixth embodiment of the present application.
Fig. 11 is a schematic cross-sectional view of a liquid crystal display device according to a seventh embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the invention, are given by way of illustration and explanation only, and are not intended to limit the scope of the invention. In the present application, unless indicated to the contrary, the use of the directional terms "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, and more particularly to the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.
The embodiment of the application provides a liquid crystal display device. The following are detailed below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments.
The application provides a liquid crystal display device, which is provided with a frame area. The liquid crystal display device comprises a liquid crystal display panel and a backlight module, wherein the backlight module is arranged on the light incident side of the liquid crystal display panel, the backlight module comprises a quantum dot film and a first prism sheet, the first prism sheet is positioned on one side of the quantum dot film close to the liquid crystal display panel, and the part of the first prism sheet, corresponding to a frame area, is doped with a first blue light absorption material.
Therefore, the liquid crystal display device provided by the application can be absorbed by the first blue light absorption material in the first prism sheet when the blue light leaked from the edge of the quantum dot film enters the first prism sheet by doping the first blue light absorption material in the part of the first prism sheet corresponding to the frame area, and further can weaken the blue light leaked from the edge of the backlight module so as to weaken the blue edge phenomenon of the liquid crystal display device. Therefore, in the design of display products, the blue edge does not need to be shielded in a mode of enlarging the width of the black matrix in the panel, and the design requirement of narrow-frame display products can be met.
The liquid crystal display device provided by the present application is explained in detail by specific examples below.
Referring to fig. 1 to 4, a liquid crystal display device 100 is provided in a first embodiment of the present application. The liquid crystal display device 100 includes a liquid crystal display panel 10 and a backlight module 20. The backlight module 20 is disposed on the light incident side of the liquid crystal display panel 10.
The backlight module 20 is bonded to the liquid crystal display panel 10 through the bonding layer 30. The adhesive layer 30 may be a light-shielding tape.
As shown in fig. 1, the liquid crystal display device 100 has a display area 101 and a frame area 102 disposed on the peripheral side of the display area 101. Specifically, the frame area 102 includes an upper frame area 102A, a first side frame area 102B, a lower frame area 102C, and a second side frame area 102D, which are sequentially connected end to end. Wherein the width of the lower border region 102C is greater than the width of the upper border region 102A.
Referring to fig. 2, the liquid crystal display panel 10 includes a lower polarizer 11, an array substrate 12, a liquid crystal layer (not shown), a color filter substrate 13, and an upper polarizer 14, which are sequentially disposed. The color filter substrate 13 includes a black matrix 131 located in the frame region 102. It should be noted that, the structures of the lower polarizer 11, the array substrate 12, the color filter substrate 13 and the upper polarizer 14 may refer to the prior art, and are not described herein again.
The backlight module 20 includes a back plate 21, and a blue light source 22, a reflective film 23, a light guide plate 24, a quantum dot film 25, a first diffusion sheet 26, a first prism sheet 27, a second prism sheet 28, and a second diffusion sheet 29 disposed on the back plate 21.
It should be noted that, in some embodiments, only the first diffusion sheet 26 may be disposed in the backlight module 20, and the second diffusion sheet 29 is omitted, which is not described herein again. In addition, the backlight module 20 in this embodiment may be a side-in type backlight module or a direct-type backlight module, and the embodiment only takes the backlight module 20 as the side-in type backlight module for illustration, but is not limited thereto.
Specifically, the blue light source 22 is disposed on a side surface of the back plate 21, and is disposed opposite to the light guide plate 24. The blue light source 22 may be a blue light emitting diode. It should be noted that the position of the blue light source 22 in the present embodiment is only illustrated for convenience of describing the present embodiment, but should not be construed as a limitation to the present application.
The reflective film 23 is disposed at the bottom of the back plate 21. The light guide plate 24, the quantum dot film 25, the first diffusion sheet 26, the first prism sheet 27, the second prism sheet 28, and the second diffusion sheet 29 are sequentially disposed on a side of the reflection film 23 away from the back sheet 21.
The quantum dot film 25 includes a first isolation film (not shown in the figure), a second isolation film (not shown in the figure) and a quantum dot layer (not shown in the figure) disposed between the first isolation film and the second isolation film, which are all related art and are not described herein again.
In the present embodiment, the first prism sheet 27 is located on a side of the quantum dot film 25 close to the liquid crystal display panel 10. The portion of the first prism sheet 27 corresponding to the frame region 102 is doped with the first blue light absorbing material. When the edge of the quantum dot film 25 is invaded by external water and oxygen and becomes invalid, the first blue light absorbing material can absorb the blue light entering the first prism sheet 27, so that the blue light leaked from the edge of the quantum dot film 25 can be weakened, the blue edge phenomenon of the liquid crystal display device 100 is weakened, and the design requirement of a narrow-frame display product can be met.
In this embodiment, the first blue light absorbing material is a high refractive particle. Wherein the refractive index of the high refractive particles is 1.65-1.68, such as 1.65, 1.66, 1.67 or 1.68. Since the wavelength of blue light is short, the high refractive particles in the above refractive index range have a good absorption effect on blue light, so that blue light at the edge can be significantly reduced. Specifically, the first blue light absorbing material includes one or more of zirconium oxide, titanium oxide, and zinc sulfide.
It should be noted that, in some embodiments, the first blue light absorbing material may also be other materials having an absorption effect on blue light, which is not limited in this application.
Further, with reference to fig. 2 to 4, the first prism sheet 27 includes a first base material layer 271 and a first prism portion 272. The first prism portion 272 is located on a side of the first base material layer 271 away from the quantum dot film 25. The first blue light-absorbing material is doped in the first prism portion 272. The first prism portion 272 is located in at least one of the upper frame area 102A, the first side frame area 102B, and the second side frame area 102D. In the present embodiment, the first prism portion 272 is disposed in the upper frame region 102A, the first side frame region 102B and the second side frame region 102D. In the liquid crystal display product, since the widths of the upper frame area 102A, the first side frame area 102B, and the second side frame area 102D are generally smaller than the width of the lower frame area 102C, the blue edge phenomenon mainly occurs in the upper frame area 102A, the first side frame area 102B, and the second side frame area 102D, and the blue edge phenomenon is improved by disposing the first prism portion 272 only in the upper frame area 102A, the first side frame area 102B, and the second side frame area 102D, and the waste of materials can be avoided.
Specifically, in the manufacturing process of the first prism sheet 27 of the present embodiment, the high refractive particles are doped in the adhesive material used by the first prism portion 272, so that the refractive index of the first prism portion 272 is greater than the refractive index of the portion (not shown) of the first prism sheet 27 corresponding to the display area 101, so as to achieve the purpose of absorbing blue light by utilizing the characteristic of high refractive index at the edge of the first prism sheet 27.
Referring to fig. 5, a second embodiment of the present application provides a liquid crystal display device 200. The second embodiment of the present application provides a liquid crystal display device 200 different from the first embodiment in that: the first prism sheet 27 is positioned between the second prism sheet 28 and the second diffusion sheet 29.
Referring to fig. 6 and 7, a third embodiment of the present application provides a liquid crystal display device 300. The third embodiment of the present application provides a liquid crystal display device 300 different from the first embodiment in that: the portion of the second prism sheet 28 corresponding to the frame region 102 is doped with a second blue light absorbing material, the second prism sheet 28 includes a second substrate layer 281 and a second prism portion 282 disposed on the second substrate layer 281, the second prism portion 282 is disposed corresponding to the first prism portion 272, and the second blue light absorbing material is located in the second prism portion 282.
Wherein the second blue light absorbing material is the same as the first blue light absorbing material. Therefore, in this embodiment, the second blue light absorbing material is doped in the second prism portion 282, and the blue light leaking from the edge of the quantum dot film 25 can be further weakened by the dual absorption effect of the first blue light absorbing material and the second blue light absorbing material on the blue light, so that the blue edge phenomenon of the liquid crystal display device 300 can be further weakened.
Referring to fig. 8, a fourth embodiment of the present application provides a liquid crystal display device 400. The fourth embodiment of the present application provides a liquid crystal display device 400 that differs from the first embodiment in that: the first diffusion sheet 26 is located on one side of the second prism sheet 28 far away from the quantum dot film 25, the second diffusion sheet 29 is located between the quantum dot film 25 and the first prism sheet 27, the backlight module 20 further includes a blue light neutralizing portion 31, the blue light neutralizing portion 31 covers the surface of the first diffusion sheet 26 far away from the quantum dot film 25, and the blue light neutralizing portion 31 is located in the frame region 102 and is disposed corresponding to the first prism portion 272.
This embodiment sets up blue light neutralization part 31 through keeping away from the surface of quantum dot film 25 at first diffusion piece 26, utilizes the neutralization effect of blue light neutralization part 31 to the blue light, can neutralize the blue light that is not absorbed by first prism portion 272 to further weaken the blue light that quantum dot film 25 edge leaked, thereby can avoid the emergence of blue limit phenomenon, and then satisfy the design demand of narrow frame display product.
Specifically, in some embodiments, the material of the blue light neutralizing portion 31 may include yellow phosphor, yellow quantum dots, or ink doped with yellow dye. By using the above materials, the blue light neutralizing portion 31 can generate yellow light under excitation of blue light, and the yellow light and the blue light are mixed to form white light, so as to achieve the effect of neutralizing the blue light. When the material of the blue light neutralizing portion 31 is ink doped with yellow dye, the blue light neutralizing portion 31 may be formed on the surface of the first diffusion sheet 26 by ink printing. In some embodiments, when the material of the blue light neutralizing portion 31 is yellow quantum dots, the color gamut of the liquid crystal display device 400 may be increased, which is further beneficial to increase the display effect of the liquid crystal display device 400.
In some embodiments, the material of the blue light-neutralizing portion 31 may also include a mixture of red phosphor and green phosphor, a mixture of red quantum dots and green quantum dots, or an ink mixture doped with red dye and green dye. By using the above materials, the blue light neutralizing portion 31 is enabled to generate red light and green light under excitation of blue light, and white light is formed by mixing of red light, green light, and blue light to achieve an effect of neutralizing blue light. When the material of the blue light neutralizing portion 31 is an ink mixture doped with red dye and green dye, the blue light neutralizing portion 31 may be formed on the surface of the first diffusion sheet 26 by ink printing. In some embodiments, when the material of the blue light neutralizing portion 31 is a mixture of red quantum dots and green quantum dots, the color gamut of the liquid crystal display device 400 may be increased, which is favorable for improving the display effect of the liquid crystal display device 400.
Referring to fig. 9, a fifth embodiment of the present application provides a liquid crystal display device 500. The fifth embodiment of the present application provides a liquid crystal display device 500 that differs from the fourth embodiment in that: the blue light neutralizing part 31 covers the surface of the first diffusion sheet 26 close to the quantum dot film 25. The distance between the blue light neutralization part 31 and the quantum dot film 25 can be shortened through the arrangement, and then the neutralization effect of the blue light neutralization part 31 on the blue light can be improved.
Referring to fig. 10, a sixth embodiment of the present application provides a liquid crystal display device 600. The sixth embodiment of the present application provides a liquid crystal display device 600 that differs from the first embodiment in that: the backlight module 20 further includes a blue light neutralizing portion 31, the blue light neutralizing portion 31 covers the surface of the first diffusion sheet 26 away from the quantum dot film 25, and the blue light neutralizing portion 31 is located in the frame region 102 and is disposed corresponding to the first prism portion 272.
In the present embodiment, the blue light neutralizing portion 31 is disposed on the surface of the first diffusion sheet 26 away from the quantum dot film 25, and the blue light leaking from the edge of the quantum dot film 25 can be reduced by the neutralizing effect of the blue light neutralizing portion 31 on the blue light; further, because first prism portion 272 is located the one side that quantum dot film 25 was kept away from to blue light neutralization portion 31, consequently, the blue light that is not neutralized can be absorbed to first blue light absorbing material in first prism portion 272, and then through the dual function of blue light neutralization portion 31 and first prism portion 272, can maximize and weaken the blue light that quantum dot film 25 edge leaked to can avoid the emergence of blue limit phenomenon, in order to satisfy the design demand of narrow frame display product.
Specifically, in some embodiments, the material of the blue light neutralizing portion 31 may include yellow phosphor, yellow quantum dots, or ink doped with yellow dye. By using the above materials, the blue light neutralizing portion 31 can generate yellow light under excitation of blue light, and the yellow light and the blue light are mixed to form white light, so as to achieve the effect of neutralizing the blue light. When the material of the blue light neutralizing portion 31 is ink doped with yellow dye, the blue light neutralizing portion 31 may be formed on the surface of the first diffusion sheet 26 by ink printing. In some embodiments, when the material of the blue light neutralizing portion 31 is yellow quantum dots, the color gamut of the liquid crystal display device 600 may be increased, which is further beneficial to increase the display effect of the liquid crystal display device 600.
In some embodiments, the material of the blue light-neutralizing portion 31 may also include a mixture of red phosphor and green phosphor, a mixture of red quantum dots and green quantum dots, or an ink mixture doped with red dye and green dye. By using the above materials, the blue light neutralizing portion 31 is enabled to generate red light and green light under excitation of blue light, and white light is formed by mixing of red light, green light, and blue light to achieve an effect of neutralizing blue light. When the material of the blue light neutralizing portion 31 is an ink mixture doped with red dye and green dye, the blue light neutralizing portion 31 may be formed on the surface of the first diffusion sheet 26 by ink printing. In some embodiments, when the material of the blue light neutralizing portion 31 is a mixture of red quantum dots and green quantum dots, the color gamut of the liquid crystal display device 600 may be increased, which is favorable for improving the display effect of the liquid crystal display device 600.
Referring to fig. 11, a seventh embodiment of the present application provides a liquid crystal display device 700. The seventh embodiment of the present application provides a liquid crystal display device 700 different from the first embodiment in that: the blue light neutralizing part 31 covers the surface of the first diffusion sheet 26 close to the quantum dot film 25. The distance between the blue light neutralization part 31 and the quantum dot film 25 can be shortened through the arrangement, and then the neutralization effect of the blue light neutralization part 31 on the blue light can be improved.
The liquid crystal display device provided by the embodiment of the present application is described in detail above, and the principle and the implementation of the present application are explained in the present application by applying specific examples, and the description of the above embodiment is only used to help understanding the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (10)

1. A liquid crystal display device having a frame region, the liquid crystal display device comprising:
a liquid crystal display panel; and
the backlight module is arranged on the light incident side of the liquid crystal display panel and comprises a quantum dot film and a first prism sheet, the first prism sheet is positioned on one side, close to the liquid crystal display panel, of the quantum dot film, and a part, corresponding to the frame area, of the first prism sheet is doped with a first blue light absorption material.
2. The lcd device of claim 1, wherein the first prism sheet comprises a first substrate layer and a first prism portion, the first prism portion is located on a side of the first substrate layer away from the quantum dot film and located in the frame region, and the first blue light absorbing material is doped in the first prism portion.
3. The lcd apparatus of claim 2, wherein the frame areas comprise an upper frame area, a first side frame area, a lower frame area and a second side frame area connected end to end in sequence, and the first prism portion is located in at least one of the upper frame area, the first side frame area and the second side frame area.
4. The liquid crystal display device according to claim 3, wherein the first prism portion is provided in the upper frame region, the first side frame region, and the second side frame region.
5. The liquid crystal display device according to claim 1, wherein the first blue light absorbing material is a high refractive particle having a refractive index of 1.65 to 1.68; and/or
The first blue light absorbing material includes one or more of zirconia, titania, and zinc sulfide.
6. The liquid crystal display device of claim 1, wherein the backlight module further comprises a second prism sheet, the second prism sheet is located on a side of the first prism sheet away from the quantum dot film, and a portion of the second prism sheet corresponding to the frame region is doped with a second blue light absorbing material.
7. The lcd device of claim 2, wherein the backlight module further comprises a first diffuser located between the first prism sheet and the quantum dot film, and a blue light neutralizing portion covering a surface of the first diffuser close to or away from the quantum dot film, the blue light neutralizing portion being located in the frame region and corresponding to the first prism portion.
8. The lcd device of claim 2, wherein the backlight module further comprises a first diffuser located on a side of the first prism sheet away from the quantum dot film, and a blue light neutralizing portion covering a surface of the first diffuser close to or away from the quantum dot film, the blue light neutralizing portion being located in the frame region and corresponding to the first prism portion.
9. The lcd apparatus of claim 7 or 8, wherein the bezel region comprises an upper bezel region, a first side bezel region, a lower bezel region and a second side bezel region connected end to end in sequence, and the blue light neutralizing portion is disposed in at least one of the upper bezel region, the first side bezel region and the second side bezel region.
10. The liquid crystal display device according to claim 7 or 8, wherein a material of the blue light neutralizing portion includes a yellow phosphor, a yellow quantum dot, or an ink doped with a yellow dye; or
The material of the blue light neutralizing part comprises a mixture of red phosphor and green phosphor, a mixture of red quantum dots and green quantum dots, or an ink mixture doped with red dye and green dye.
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CN111897037A (en) * 2020-08-10 2020-11-06 深圳市宝明科技股份有限公司 Brightness enhancement film, manufacturing method thereof and backlight module
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CN104991295A (en) * 2015-06-23 2015-10-21 东莞市纳利光学材料有限公司 Brightness enhancement film having blue light resistance effect and manufacturing method thereof
CN105842926A (en) * 2016-06-17 2016-08-10 武汉华星光电技术有限公司 Liquid crystal display (LCD)
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