CN111948851A - Brightness enhancement film, backlight module and display device - Google Patents
Brightness enhancement film, backlight module and display device Download PDFInfo
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- CN111948851A CN111948851A CN202010800668.XA CN202010800668A CN111948851A CN 111948851 A CN111948851 A CN 111948851A CN 202010800668 A CN202010800668 A CN 202010800668A CN 111948851 A CN111948851 A CN 111948851A
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- brightness enhancement
- enhancement film
- refraction portion
- refraction
- substrate
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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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
Abstract
The application provides a brightness enhancement film, backlight unit and display device, brightness enhancement film include base plate, first refraction portion, second refraction portion, and the base plate has relative first face and the second face that sets up, and first refraction portion sets up first face, first refraction portion is kept away from the one side of base plate has a plurality of recesses, the setting of second refraction portion is in first refraction portion is kept away from the one side of base plate, just second refraction portion have with recess equipment bulge, wherein, first refraction portion and second refraction portion are when visible light passes, and the refractive index difference value of first refraction portion and second refraction portion is greater than the refractive index difference value of first refraction portion and second refraction portion when detecting light and passing, detect light and be infrared ray or ultraviolet ray. The application can avoid producing the brightness enhancement film of crosstalking to the detection light beam.
Description
Technical Field
The application relates to the technical field of display, in particular to a brightness enhancement film, a backlight module and a display device.
Background
With the development of liquid crystal display technology, users demand more functions and fashionable appearances for electronic products such as mobile phones, tablet computers, cameras and the like. At present, the development trend of mobile phones is light, thin and close to a full screen. Recently, in order to achieve a full screen or nearly full screen effect, a technology of detecting biological features under a screen has come into use, that is, a biological feature detection module is placed below a display screen, and biological feature detection is achieved by sending or receiving detection light beams through the display screen. At present, a brightness enhancement film in the backlight module can generate serious crosstalk to a detection light beam, and biological characteristic detection cannot be realized.
Therefore, it is an urgent technical problem to provide a brightness enhancement film capable of preventing crosstalk from occurring in a detection beam.
Disclosure of Invention
The embodiment of the application provides a brightness enhancement film, a backlight module and a display device, and the brightness enhancement film can avoid crosstalk generated on detection light beams.
The embodiment of the application provides a brightness enhancement film, including:
the substrate is provided with a first surface and a second surface which are oppositely arranged;
the first refraction part is arranged on the first surface, and one surface, far away from the substrate, of the first refraction part is provided with a plurality of grooves;
the second refraction part is arranged on one surface, far away from the substrate, of the first refraction part, and is provided with a groove device protruding part;
when the visible light passes through the first refraction part and the second refraction part, the refractive index difference value of the first refraction part and the second refraction part is larger than that of the first refraction part and the second refraction part when the detection light passes through, and the detection light is infrared or ultraviolet.
In some embodiments, when visible light passes through the first refractive portion and the second refractive portion, the refractive index difference between the first refractive portion and the second refractive portion is 1.49 to 1.51, and when detection light passes through the first refractive portion and the second refractive portion, the refractive index difference between the first refractive portion and the second refractive portion is 1.
In some embodiments, the first refractive portion has a refractive index smaller than a refractive index of the second refractive portion.
In some embodiments, the first refraction portion is made of a material including polymethyl methacrylate, silicon dioxide, and magnesium fluoride. The material that the second refraction portion adopted includes polyethylene glycol terephthalate, titanium oxide and tantalum oxide, the material that the base plate adopted is polyethylene glycol terephthalate.
In some embodiments, the wavelength of the visible light is 380-720nm, and the wavelength of the detection light is 800 nm.
In some embodiments, a surface of the first refraction portion, which is far away from the substrate, is provided with a plurality of arc-shaped protrusions, and the groove is positioned between the arc-shaped protrusions.
In some embodiments, a side of the first refraction portion away from the substrate has a plurality of triangular protrusions, and the groove is located between the triangular protrusions.
In some embodiments, a face of the first refraction portion, which faces away from the substrate, is provided with a plurality of trapezoidal protrusions, and the groove is located between the trapezoidal protrusions.
The embodiment of the application still provides a backlight unit, including reflector plate, leaded light piece, diffusion piece, brightness enhancement film, light source and sensor module, reflector plate, leaded light piece, diffusion piece, brightness enhancement film and sensor module stack gradually the setting, the light source is located the side of leaded light piece, brightness enhancement film be above the brightness enhancement film.
The embodiment of the application provides a display device includes backlight unit and display panel, display panel is located on the backlight unit, backlight unit be above backlight unit.
The embodiment of the application provides a brightness enhancement film, backlight unit and display device, brightness enhancement film include base plate, first refraction portion, second refraction portion, and the base plate has relative first face and the second face that sets up, and first refraction portion sets up first face, first refraction portion is kept away from the one side of base plate has a plurality of recesses, the setting of second refraction portion is in first refraction portion is kept away from the one side of base plate, just second refraction portion have with recess equipment bulge, wherein, first refraction portion and second refraction portion are when visible light passes, and the refractive index difference value of first refraction portion and second refraction portion is greater than the refractive index difference value of first refraction portion and second refraction portion when detecting the light and passing, detect the light and be infrared ray or ultraviolet ray. This application is because the refractive index difference of first refraction portion and second refraction portion is greater than the refractive index difference of first refraction portion and second refraction portion when detecting the light and passing, consequently, can ensure the penetration performance of visible light, avoids backlight unit's detection light beam's crosstalk, realizes the function that liquid crystal display device biological characteristics detected, has strengthened the differentiation performance of product, has promoted the market competition of product.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic view of a structure of a brightness enhancement film according to an embodiment of the present disclosure.
Fig. 2 is a schematic view of another structure of a brightness enhancement film according to an embodiment of the present disclosure.
Fig. 3 is a schematic view of another structure of a brightness enhancement film according to an embodiment of the present disclosure.
Fig. 4 is a schematic structural diagram of a backlight module according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
It should be noted that in the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the present application.
Embodiments of the present disclosure provide a brightness enhancement film, a backlight module and a display device, which are described in detail below.
Referring to fig. 1, fig. 1 is a schematic view illustrating a structure of a brightness enhancement film according to an embodiment of the present disclosure. The brightness enhancement film 14 includes a substrate 141, a first refraction portion 142, and a second refraction portion 143, the substrate 141 has a first surface 141a and a second surface 141b opposite to each other, the first refraction portion 142 is disposed on the first surface 141a, a surface of the first refraction portion 142 away from the substrate 141 has a plurality of grooves 144, the second refraction portion 143 is disposed on a surface of the first refraction portion 142 away from the substrate 141, and the second refraction portion 143 has projections corresponding to the grooves 144, wherein when the first refraction portion 142 and the second refraction portion 143 pass through visible light, a difference between refractive indexes of the first refraction portion 142 and the second refraction portion 143 is greater than a difference between refractive indexes of the first refraction portion 142 and the second refraction portion 143 when the first refraction portion 142 and the second refraction portion 143 pass through detection light, and the detection light is infrared light or ultraviolet light.
The first surface 141a is an upper surface of the substrate 141, and the second surface 141b is a lower surface of the substrate 141. Of course, the first surface 141a may be a lower surface of the substrate 141, and the second surface 141b may be an upper surface of the substrate 141.
When the visible light passes through the first refraction portion 142 and the second refraction portion 143, the refractive index difference between the first refraction portion 142 and the second refraction portion 143 is 1.49 to 1.51, and when the detection light passes through the first refraction portion 142 and the second refraction portion 143, the refractive index difference between the first refraction portion 142 and the second refraction portion 143 is 1.
Note that the difference between the refractive indexes of the first refractive portion 142 and the second refractive portion 143 may be 1.49, 1.5, or 1.51. It can be understood that by controlling the refractive index difference of different light rays in different materials, the brightness enhancement effect of visible light is maintained, and the function of collimating and passing through the detection light beam is realized.
Wherein the refractive index of the first refractive portion 142 is smaller than the refractive index of the second refractive portion 143.
The material used for the first refraction portion 142 includes polymethyl methacrylate, silicon dioxide, and magnesium fluoride. The material used for the second refraction portion 143 includes polyethylene terephthalate, titanium oxide, and tantalum oxide, and the material used for the substrate 141 is polyethylene terephthalate. It can be understood that, in the embodiments of the present application, through the use of the above materials, the refractive indexes of the first refractive portion 142 and the second refractive portion 143 are different, and at the same time, the refractive indexes of the first refractive portion 142 and the second refractive portion 143 can be ensured to be in an appropriate range, so as to avoid crosstalk to the detection beam.
The wavelength of the visible light is 380-720nm, and the wavelength of the detection light is 800 nm. It is understood that the wavelength of visible light may be in other wavelength ranges, and the wavelength of detection light may be in other wavelengths, for example, the wavelength of detection light is 1000 nm.
Specifically, the visible light and the detection light and the refractive index light are shown in the following figures:
one surface of the first refracting part 142, which is far away from the substrate 141, has a plurality of arc protrusions 1421, and the groove 144 is located between the arc protrusions 1421.
Referring to fig. 2, fig. 2 is a schematic view of another structure of a brightness enhancement film according to an embodiment of the present disclosure. One surface of the first refraction portion 142 away from the substrate 141 has triangular protrusions 1422, and the groove 144 is located between the triangular protrusions 1422.
Referring to fig. 3, fig. 3 is a schematic view of another structure of a brightness enhancement film according to an embodiment of the present disclosure. One surface of the first refracting part 142, which is away from the substrate 141, has a plurality of trapezoidal protrusions 1423, and the groove 144 is located between the trapezoidal protrusions 1423.
The brightness enhancement film 14 provided by the embodiment of the present application includes a substrate 141, a first refraction portion 142, and a second refraction portion 143, wherein the substrate 141 has a first surface 141a and a second surface 141b opposite to each other, the first refraction portion 142 is disposed on the first surface 141a, a face of the first refraction portion 142 away from the substrate 141 has a plurality of grooves 144, the second refraction portion 143 is disposed on a surface of the first refraction portion 142 away from the substrate 141, and the second refraction portion 143 has a protrusion protruding from the groove 144, when the visible light passes through the first refraction portion 142 and the second refraction portion 143, the refractive index difference between the first refraction portion 142 and the second refraction portion 143 is larger than the refractive index difference between the first refraction portion 142 and the second refraction portion 143 when the detection light passes through the first refraction portion 142 and the second refraction portion 143, and the detection light is infrared light or ultraviolet light. This application is because the refractive index difference of first refraction portion 142 and second refraction portion 143 is greater than the refractive index difference of first refraction portion 142 and second refraction portion 143 when detecting the light and passing, consequently, can ensure the penetration performance of visible light, avoid backlight unit 10's detection light beam's crosstalk, realize the function that liquid crystal display device 100 biological characteristics detected, the differentiation performance of product has been strengthened, the market competition of product has been promoted.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a backlight module according to an embodiment of the present disclosure. The backlight module 10 includes a reflector 11, a light guide plate 12, a diffusion plate 13, a brightness enhancement film 14, a light source 15 and a sensor module 16, the reflector 11, the light guide plate 12, the diffusion plate 13, the brightness enhancement film 14 and the sensor module 16 are sequentially stacked, the light source 15 is located on the side edge of the light guide plate 12, and the brightness enhancement film 14 is the brightness enhancement film 14. The brightness enhancement film 14 has been described in detail in the above embodiments, and therefore, the brightness enhancement film 14 is not described in detail in the embodiments of the present application.
Because the backlight module 10 of the embodiment of the present application uses the brightness enhancement film 14 of the above embodiment, the backlight module 10 of the embodiment of the present application can ensure the penetrating performance of the visible light, avoid the crosstalk of the detection light beam of the backlight module 10, realize the function of detecting the biological characteristics of the liquid crystal display device 100, enhance the differentiation performance of the product, and improve the market competitiveness of the product.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present disclosure. The display device 100 includes a backlight module 10 and a display panel 20, the display panel 20 is located on the backlight module 10, and the backlight module 10 is the above-mentioned backlight module 10. The backlight module 10 has been described in detail in the above embodiments, and therefore, the backlight module 10 is not described in detail in this embodiment.
Because the backlight module 10 of the embodiment of the present application uses the brightness enhancement film 14 of the above embodiment, the backlight module 10 of the embodiment of the present application can ensure the penetrating performance of the visible light, avoid the crosstalk of the detection light beam of the backlight module 10, realize the function of detecting the biological characteristics of the liquid crystal display device 100, enhance the differentiation performance of the product, and improve the market competitiveness of the product.
The embodiments of the present application provide a brightness enhancement film, a backlight module and a display device, and specific examples are applied to illustrate the principles and embodiments 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 brightness enhancing film, comprising:
the substrate is provided with a first surface and a second surface which are oppositely arranged;
the first refraction part is arranged on the first surface, and one surface, far away from the substrate, of the first refraction part is provided with a plurality of grooves;
the second refraction part is arranged on one surface, far away from the substrate, of the first refraction part, and is provided with a groove device protruding part;
when the visible light passes through the first refraction part and the second refraction part, the refractive index difference value of the first refraction part and the second refraction part is larger than that of the first refraction part and the second refraction part when the detection light passes through, and the detection light is infrared or ultraviolet.
2. The brightness enhancement film according to claim 1, wherein the first refractive portion and the second refractive portion have a refractive index difference of 1.49 to 1.51 when visible light passes through the first refractive portion and the second refractive portion have a refractive index difference of 1 when detection light passes through the first refractive portion and the second refractive portion.
3. The brightness enhancing film according to claim 2, wherein the first refractive portion has a refractive index less than the second refractive portion.
4. The brightness enhancement film according to claim 1, wherein the first refractive portion comprises polymethyl methacrylate, silicon dioxide and magnesium fluoride, the second refractive portion comprises polyethylene terephthalate, titanium oxide and tantalum oxide, and the substrate comprises polyethylene terephthalate.
5. The brightness enhancement film as claimed in claim 1, wherein the visible light has a wavelength of 380-720nm and the detecting light has a wavelength of 800 nm.
6. The brightness enhancement film according to claim 1, wherein a surface of the first refractive portion facing away from the substrate has a plurality of arc-shaped protrusions, and the groove is located between the arc-shaped protrusions.
7. The brightness enhancement film according to claim 1, wherein a surface of the first refractive portion facing away from the substrate has a plurality of triangular protrusions, and the grooves are located between the triangular protrusions.
8. The brightness enhancement film according to claim 1, wherein a surface of the first refractive portion facing away from the substrate has a plurality of trapezoidal protrusions, and the groove is located between the trapezoidal protrusions.
9. A backlight module is characterized by comprising a reflector plate, a light guide plate, a diffusion plate, a brightness enhancement film, a light source and a sensor module, wherein the sensor module, the reflector plate, the light guide plate, the diffusion plate, the brightness enhancement film and the sensor module are sequentially stacked, the light source is positioned on the side edge of the light guide plate, and the brightness enhancement film is the brightness enhancement film as claimed in any one of claims 1 to 8.
10. A display device comprising a backlight module and a display panel, wherein the display panel is disposed on the backlight module, and the backlight module is the backlight module according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010800668.XA CN111948851B (en) | 2020-08-11 | 2020-08-11 | Brightness enhancement film, backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010800668.XA CN111948851B (en) | 2020-08-11 | 2020-08-11 | Brightness enhancement film, backlight module and display device |
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| Publication Number | Publication Date |
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| CN111948851A true CN111948851A (en) | 2020-11-17 |
| CN111948851B CN111948851B (en) | 2022-05-31 |
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| CN202010800668.XA Active CN111948851B (en) | 2020-08-11 | 2020-08-11 | Brightness enhancement film, backlight module and display device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008170871A (en) * | 2007-01-15 | 2008-07-24 | Toppan Printing Co Ltd | Optical sheet, backlight unit using the same, display device and method for manufacturing the device |
| TW200951498A (en) * | 2008-01-14 | 2009-12-16 | Entire Technology Co Ltd | Brightness enhancement film, backlight module for using the same, and method for manufacturing the same |
| CN109212820A (en) * | 2018-10-30 | 2019-01-15 | 惠科股份有限公司 | Optical compound film and display panel |
| CN110941111A (en) * | 2019-10-28 | 2020-03-31 | 深圳市隆利科技股份有限公司 | Display device for fingerprint recognition |
| CN210488189U (en) * | 2019-07-08 | 2020-05-08 | 深圳市宝明科技股份有限公司 | Backlight structure with brightening effect and display device with backlight structure |
-
2020
- 2020-08-11 CN CN202010800668.XA patent/CN111948851B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008170871A (en) * | 2007-01-15 | 2008-07-24 | Toppan Printing Co Ltd | Optical sheet, backlight unit using the same, display device and method for manufacturing the device |
| TW200951498A (en) * | 2008-01-14 | 2009-12-16 | Entire Technology Co Ltd | Brightness enhancement film, backlight module for using the same, and method for manufacturing the same |
| CN109212820A (en) * | 2018-10-30 | 2019-01-15 | 惠科股份有限公司 | Optical compound film and display panel |
| CN210488189U (en) * | 2019-07-08 | 2020-05-08 | 深圳市宝明科技股份有限公司 | Backlight structure with brightening effect and display device with backlight structure |
| CN110941111A (en) * | 2019-10-28 | 2020-03-31 | 深圳市隆利科技股份有限公司 | Display device for fingerprint recognition |
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| CN111948851B (en) | 2022-05-31 |
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