CN113985655A - Backlight module for television based on optical composite film - Google Patents
Backlight module for television based on optical composite film Download PDFInfo
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- CN113985655A CN113985655A CN202111229798.3A CN202111229798A CN113985655A CN 113985655 A CN113985655 A CN 113985655A CN 202111229798 A CN202111229798 A CN 202111229798A CN 113985655 A CN113985655 A CN 113985655A
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- composite film
- optical composite
- backlight module
- prism
- 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
- G02F1/133—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
-
- 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
-
- 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
- G02B6/0055—Reflecting element, sheet or layer
-
- 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
Abstract
The invention discloses a backlight module for a television based on an optical composite film, which comprises: the backlight module comprises a rear metal cover, a side light source, a light guide plate and an optical composite film, wherein lamp reflecting plates are arranged on the inner walls of two sides of the rear metal cover, a side light source is arranged in the middle of each lamp reflecting plate, a reflecting sheet is arranged on the inner wall of the bottom of the rear metal cover, the light guide plate is arranged above the reflecting sheet, the optical composite film is arranged above the light guide plate, a quantum dot reinforced film is arranged above the optical composite film, and a brightness enhancement film is arranged above the quantum dot reinforced film.
Description
Technical Field
The invention relates to the technical field of backlight modules, in particular to a television backlight module based on an optical composite film.
Background
The backlight module is one of the key components of the liquid crystal display panel. The function is to provide sufficient brightness and light source with uniform distribution, so that the image can be displayed normally. The backlight module mainly comprises a light source, a light guide plate, an optical film, a plastic frame and the like, and along with the development trend of high-definition thinning of a display, the optical film used by a large-size LCD display device such as a liquid crystal television and the like is also developed towards thinning and compositing.
The backlight module for the television of the existing optical composite film needs the composition of different films to meet the required display requirement in the production process, but the composition of different films greatly increases the thickness of the backlight module, and brings difficulty for the light and thin production of the backlight module.
Disclosure of Invention
The present invention is directed to a backlight module for a television based on an optical composite film, so as to solve the problems mentioned in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a backlight module for a television based on an optical composite film comprises: the novel LED lamp comprises a rear metal cover, a side light source, a light guide plate and an optical composite film, wherein lamp reflecting plates are arranged on the inner walls of two sides of the rear metal cover, a side light source is arranged in the middle of each lamp reflecting plate, a reflecting sheet is arranged on the inner wall of the bottom of the rear metal cover, the light guide plate is arranged above the reflecting sheet, the optical composite film is arranged above the light guide plate, a quantum dot reinforced film is arranged above the optical composite film, a brightness enhancement film is arranged above the quantum dot reinforced film, and a prism layer is arranged between the top of the light guide plate and the bottom of the optical composite film.
Preferably, the top layer of the optical composite film is a diffusion layer, a prism layer is arranged below the diffusion layer, PET (polyethylene terephthalate) base materials are arranged on the upper side and the lower side of the prism layer, and prism glue is arranged between the top of the prism layer and the PET base materials.
Preferably, the refractive index of the prism layer is 1% -2%, and the thickness of the prism layer is 10-50 μm.
Preferably, the bottom of the light guide plate is provided with linear V-shaped grooves which are arranged at equal intervals, and the planar reflecting surface is changed into two reflecting surfaces with angles, so that the incident light source is refracted, and the outgoing light is uniform.
Preferably, the thickness of the PET substrate is 115-135 μm, the light transmittance of the PET substrate is at least 93%, the higher the light transmittance of the PET substrate is, the higher the brightness of the composite film is, and the thickness of the PET substrate is 115-135 μm, so as to meet the thinning requirement of the whole composite film.
Preferably, the refractive index of the prism glue is 1.54-1.64, the thickness of the prism glue is 1.5-2.5 μm, the thicker the prism glue, the more the brightness is reduced, the greater the bonding strength is, and when the thickness of the prism glue is 1.5-2.5 μm, the balance between the brightness and the bonding strength is achieved.
Preferably, the vertex angle of the prism layer is any one of an arc triangle, a wavy structure, a micro-lens structure or a right triangle.
Preferably, the prism layer vertex angle structures are arranged in a staggered mode with two high peaks and two low peaks, the prism layer has a peak height of 11-13 microns and a peak height of 7-9 microns, the prism structure with one high peak and two low peaks can improve the central brightness by 2.8% -3.5%, compared with the existing prism with the same height, the brightness can be improved more obviously by arranging more low peaks, the increase of the low peaks means that the total bonding area of the high peaks and the upper film is reduced, the peak structure is used for increasing the bonding strength of the prism layer, the brightness of the whole optical composite film is guaranteed, and meanwhile the strength of the optical film is guaranteed.
Preferably, the reflectivity of the lamp reflecting plate is at least 95%, so that the brightness of the backlight module is increased.
Preferably, the reflectivity of the reflector plate is at least 95%, so that the brightness of the backlight module is increased.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, through the optical composite film and the quantum dot reinforced film, when the backlight module for the television based on the optical composite film is used, the optical composite film is integrated above the light guide plate, so that the light guide plate and the optical composite film are integrated, and the functions of the prism layer are integrated into the light guide plate, thereby not only reducing the thickness of the backlight module and simplifying the structure, but also reducing outsourcing assemblies, lowering the cost, shortening the assembly time, and achieving the purposes of high brightness and low cost.
Drawings
FIG. 1 is an enlarged schematic view of the overall cross-sectional structure of the present invention;
FIG. 2 is a schematic view of a V-shaped groove at the bottom of the light guide plate according to the present invention;
FIG. 3 is a schematic diagram of a prism structure of sample 1 according to a second embodiment of the present invention;
FIG. 4 is a schematic view of a prism structure of sample 2 according to a second embodiment of the present invention;
FIG. 5 is a schematic view of a prism structure of sample 3 according to a second embodiment of the present invention;
fig. 6 is a schematic view of the prism structure of sample 4 in the second embodiment of the present invention.
In the figure: 1-rear metal cover; 2-a lamp reflector; 3-side entry light source; 4-a light guide plate; 401-a microlens; 5-an optical composite film; 501-diffusion layer; 502-a prism layer; 6-a quantum dot enhancement film; 7-a brightness enhancement film; 8-reflective sheet.
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.
Referring to fig. 1-6, the present invention provides a technical solution: a backlight module for a television based on an optical composite film comprises: back metal covering 1, side light source 3, light guide plate 4 and optics complex film 5, the inner wall of 1 both sides of back metal covering is equipped with lamp reflecting plate 2, and 2 middle parts of lamp reflecting plate are equipped with side light source 3, and the inner wall of 1 bottom of back metal covering is equipped with reflector plate 8, and 8 tops of reflector plate are equipped with light guide plate 4, and 4 tops of light guide plate are equipped with optics complex film 5, and 5 tops of optics complex film are equipped with quantum dot reinforced film 6, and 6 tops of quantum dot reinforced film are equipped with brightness enhancement film 7, be equipped with prism layer 502 between 5 bottoms of 4 tops of light guide plate and optics complex film.
5 top layers of optical composite film are diffusion layer 501, and diffusion layer 501 below is prism layer 502, and both sides are equipped with the PET substrate about prism layer 502, are equipped with prism glue between prism layer top and the PET substrate.
The refractive index of the prism layer is 1% -2%, the thickness of the prism layer is 10-50 μm, linear V-shaped grooves which are arranged at equal intervals are arranged at the bottom of the light guide plate 4, the planar reflecting surfaces are changed into two reflecting surfaces with angles, the light source is refracted, the uniformity of emergent light rays is facilitated, the thickness of the PET substrate is 115-135 μm, the light transmittance of the PET substrate is at least 93%, the higher the light transmittance of the PET substrate is, the higher the brightness of the composite film is, and the thickness of the PET substrate is 115-135 μm, so that the thinning requirement of the whole composite film is met.
Preferably, the refractive index of the prism glue is 1.54-1.64, the thickness of the prism glue is 1.5-2.5 μm, the thicker the prism glue, the more the brightness is reduced, the higher the bonding strength is, and when the thickness of the prism glue is 1.5-2.5 μm, the balance between the brightness and the bonding strength is achieved.
The vertex angle of the prism layer 502 is an arc triangle, a wavy structure, a micro lens or a right triangle, and any one of the structures, the vertex angle structure of the prism layer 502 is in staggered arrangement of two heights, the peak height of the prism layer 502 is 11-13 μm, the peak height of the low peak is 7-9 μm, the prism structure of one height and two heights can improve the central brightness by 2.8% -3.5%, compared with the existing prism with the same height, more low peaks are arranged to enable the brightness to be improved more obviously, the increase of the low peaks means the reduction of the total bonding area of the peak and the upper film, the peak structure is used for increasing the bonding strength of the prism layer, the brightness of the whole optical composite film is guaranteed, and meanwhile, the strength of the optical film is guaranteed.
The reflectivity of the lamp reflecting plate 2 is at least 95%, which is convenient for increasing the brightness of the backlight module, and the reflectivity of the reflector plate 8 is at least 95%, which is convenient for increasing the brightness of the backlight module.
When the backlight module for the television based on the optical composite film is used, the optical composite film is integrated above the light guide plate 4, so that the light guide plate 4 and the optical composite film 5 are integrated, the function of the prism layer 502 is integrated into the light guide plate, the thickness of the backlight module is reduced, the manufacture is simplified, purchased components can be reduced, the cost is reduced, the assembly time is shortened, and the purposes of high brightness and low cost are achieved.
In the second embodiment, performance tests were performed on four different types of optical composite films formed by four different prism structures, that is, in the first embodiment, the prism layer 502 with a circular arc triangle vertex (sample 1), the prism layer 502 with a wavy vertex (sample 2), the prism layer 502 with a microlens structure (sample 3), and the prism layer 502 with a right triangle vertex (sample 4), and compared with the existing optical films (comparative examples), and the results are shown in the following table:
as can be seen from the above table:
comparative example: the light transmittance is low, the loss of light energy passing through the composite film with the structure is large, however, the axial brightness is obviously improved, the traditional optical composite film structure has an excellent light-gathering and brightening effect, the characteristic is reflected by a small visual angle, and the display uniformity and the chromaticity unevenness are obviously improved.
Sample 1: the display characteristics are similar to those of the comparative example, and the novel circular arc treatment of the apex angle of the upper layer prism microstructure enables the prism microstructure to have a wider visual angle and higher light energy utilization rate compared with the comparative example, and simultaneously ensures axial brightness gain.
Sample 2: the upper strata adopts novel design, becomes the wavy microstructure with the prism for the complex film of this kind of structure has good visual domain and higher axial luminance concurrently, and the luminance homogeneity also promotes to be showing, and simultaneously in practical application, the wavy microstructure in upper strata can also effectively weaken the bad and mole stripe of optical coupling badly.
Sample 3: the upper laminating layer adopts the micro lens, and the composite membrane has the functions of brightening and diffusing, so that the composite membrane has excellent performances on brightening and visual fields, and the angular brightness curve has no poor light coupling.
Sample 4: the composite film has the advantages of high light energy utilization rate, excellent visual domain, poorer brightening performance than other composite film structures, and outstanding brightness uniformity due to the application of the upper diffusion layer.
The optical composite films of four different models designed in the invention realize ultrathin, high-definition, high-gamut and vivid-color display effects, meet the requirements of various models and variable parameters, and realize the slimming plan of the backlight module by matching the display effects of high color gamut, high saturation and vivid color of unique performance items of the quantum dot reinforced film with the optical composite films, thereby realizing the ultrathin effect.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a backlight unit for TV based on optics complex film which characterized in that: the method comprises the following steps:
a rear metal cover (1);
a side-entry light source (3);
a light guide plate (4);
an optical composite film (5),
wherein, back metal cover (1) both sides inner wall is equipped with lamp reflecting plate (2), lamp reflecting plate (2) middle part is equipped with the side and goes into light source (3), back metal cover (1) bottom inner wall is equipped with reflector plate (8), reflector plate (8) top is equipped with light guide plate (4), light guide plate (4) top is equipped with optics complex film (5), optics complex film (5) top is equipped with quantum dot reinforcing film (6), quantum dot reinforcing film (6) top is equipped with brightness enhancement film (7), be equipped with prism layer (502) between light guide plate (4) and optics complex film (5).
2. The backlight module for TV set based on optical composite film as claimed in claim 1, wherein: the top layer of the optical composite film (5) is a diffusion layer (501), a prism layer (502) is arranged below the diffusion layer (501), PET base materials are arranged on the upper side and the lower side of the prism layer (502), and prism glue is arranged between the top of the prism layer and the PET base materials.
3. The backlight module for TV set based on optical composite film as claimed in claim 2, wherein: the refractive index of the prism layer (502) is 1% -2%, and the thickness of the prism layer (502) is 10-50 μm.
4. The backlight module for TV set based on optical composite film as claimed in claim 1, wherein: the bottom of the light guide plate (4) is provided with linear V-shaped grooves which are arranged at equal intervals and used for refracting light generated by the light source (3) entering the side, so that the light is emitted uniformly.
5. The backlight module for TV set based on optical composite film as claimed in claim 2, wherein: the thickness of the PET substrate is 115-135 mu m, and the light transmittance of the PET substrate is at least 93%.
6. The backlight module for TV set based on optical composite film as claimed in claim 2, wherein: the refractive index of the prism glue is 1.54-1.64, and the thickness of the prism glue is 1.5-2.5 μm.
7. The backlight module for TV set based on optical composite film as claimed in claim 1, wherein: the vertex angle of the prism layer (502) is any one of an arc triangle, a wavy structure, a micro-lens structure or a right triangle.
8. The backlight module for TV set based on optical composite film as claimed in claim 1, wherein: the vertex angle structures of the prism layers (502) are arranged in a staggered mode, wherein the peak height of the prism layers (502) is 11-13 mu m, and the peak height of the low peak is 7-9 mu m.
9. The backlight module for TV set based on optical composite film as claimed in claim 1, wherein: the reflectivity of the lamp reflector plate (2) is at least 95%.
10. The backlight module for TV set based on optical composite film as claimed in claim 1, wherein: the reflectivity of the reflecting sheet (8) is at least 95%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111229798.3A CN113985655B (en) | 2021-10-22 | 2021-10-22 | Backlight module for television based on optical composite film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111229798.3A CN113985655B (en) | 2021-10-22 | 2021-10-22 | Backlight module for television based on optical composite film |
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| Publication Number | Publication Date |
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| CN113985655A true CN113985655A (en) | 2022-01-28 |
| CN113985655B CN113985655B (en) | 2023-04-07 |
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| CN202111229798.3A Active CN113985655B (en) | 2021-10-22 | 2021-10-22 | Backlight module for television based on optical composite film |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116305366A (en) * | 2023-05-23 | 2023-06-23 | 四川启睿克科技有限公司 | Modeling method and simplified model of liquid crystal display television heat dissipation simulation module |
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| TW200819861A (en) * | 2006-10-25 | 2008-05-01 | Innolux Display Corp | Backlight module |
| CN204129246U (en) * | 2014-09-25 | 2015-01-28 | 深圳市聚飞光学材料有限公司 | A kind of combined type brightness enhancement film and backlight module |
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| CN113985655B (en) | 2023-04-07 |
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