CN109001937A - A kind of economical direct type backlight assembly - Google Patents
A kind of economical direct type backlight assembly Download PDFInfo
- Publication number
- CN109001937A CN109001937A CN201810064353.6A CN201810064353A CN109001937A CN 109001937 A CN109001937 A CN 109001937A CN 201810064353 A CN201810064353 A CN 201810064353A CN 109001937 A CN109001937 A CN 109001937A
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- diffusion sheet
- light
- backlight assembly
- direct type
- type backlight
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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
-
- 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
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- 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
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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)
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
Abstract
A kind of economical direct type backlight assembly, it include: backboard, reflecting plate, backlight, diffusion sheet, the quantity of diffusion sheet is 2~4, diffusion sheet is independent by diffused diffusion sheet or light collecting type diffusion sheet or mixing group assembles, wherein the two sides of diffused diffusion sheet is respectively regular polygon groove structure, lenticular protrusion repeatedly spreads light, improve brightness and brightness uniformity, light collecting type diffusion sheet is ABA formula structure, the outer layer surface of two sides is decorative pattern on one side, shiny surface, another outer layer surface is arc-shaped strip or triangle strip projected parts, middle layer is made of transparent base and light diffusing agent, light collecting type diffusion sheet is set to further increase light luminance while uniformly diffusion to light, while reaching reduces direct type backlight assembly production cost, guarantee light-source brightness uniformity, by to diffused diffusion sheet, collection The setting of light type diffusion sheet relative populations meets the requirement of different brightness backlights components.
Description
Technical field
The present invention relates to LED device technical field, specially a kind of economical direct type backlight assembly.
Background technique
Since liquid crystal display itself can not shine, so needing to provide uniform area source by backlight assembly for it.
Backlight assembly is divided into direct type backlight assembly, side entrance back component at present.Backboard, anti-is generally included in direct type backlight assembly
Piece, backlight, diffusion sheet, prismatic lens are penetrated, since LED grain is uniformly configured in the rear of liquid crystal display panel by direct type backlight assembly
As light emitting source, backlight is allow uniformly to be passed to entire screen, picture detail is finer and smoother true to nature, so directly-down liquid crystal is shown
Device still occupies certain selling market.Different clients are different to the brightness demand of liquid crystal display, the view of household liquid crystal display
Hearing distance relatively closely and from the angle of protection eyesight without excessively high brightness requirement, reaches 180cd/m2, but for
The brightness requirement of outdoor commercial liquid crystals display is higher, need to generally reach 200cd/m2More than.The effect of prismatic lens is mainly adjusted
The concentration structure of whole beam projecting angle, so prismatic lens have a good adjustment effect to the raising of light-source brightness, but prism
The higher cost of piece is 4~5 times of diffusion sheet or so, so leading to the higher cost of direct type backlight assembly, weakens competition
Advantage；Secondly, the integral thickness of direct type backlight assembly is larger, shows slightly heavy, violate the actual demand of market lightweight.
In view of the above technical problems, which proposes a kind of economical direct type backlight assembly, comprising: backboard, reflecting plate,
Backlight, diffusion sheet, the quantity of diffusion sheet are 2~4, and diffusion sheet is independent by diffused diffusion sheet or light collecting type diffusion sheet or mixes
Group assembles, and wherein the two sides of diffused diffusion sheet is respectively regular polygon groove structure, lenticular protrusion to light progress
Repeatedly diffusion improves brightness and brightness uniformity, and light collecting type diffusion sheet is ABA formula structure, and the outer layer surface of two sides is colored on one side
Line, shiny surface, another outer layer surface are arc-shaped strip or triangle strip projected parts, and middle layer is by transparent base and light diffusing agent group
At making light collecting type diffusion sheet further increase light luminance while uniformly diffusion to light, reaching reduction straight-down negative
While backlight assembly production cost, guarantee light-source brightness uniformity, by opposite to diffused diffusion sheet, light collecting type diffusion sheet
The setting of quantity meets the requirement of different brightness backlights components.
Summary of the invention
A kind of economical direct type backlight assembly, comprising: backboard 1, reflecting plate 2, backlight 3, diffusion sheet 4, diffusion sheet 4
Quantity is 2~4, and reflecting plate 2 is mounted on the medial surface of backboard 1, and the top position of reflecting plate 2 is arranged in backlight 3, passes through reflection
The light that backlight 3 shoots to rear and two sides is reflected into the diffusion sheet 4 of front by plate 2, via treated the face light of diffusion sheet 4
Source is supplied to the liquid crystal display panel 5 for being placed in 4 front of diffusion sheet.
By replacing high-cost prismatic lens using the diffusion sheet 4 of low cost in above-mentioned direct type backlight assembly, drop significantly
The low manufacturing cost of direct type backlight assembly.
Preferably, the economical direct type backlight assembly, the two sides of backboard 1 are equipped with identical as the quantity of diffusion sheet 4
Buckle slot, diffusion sheet 4 is placed in the buckle slot of 1 two sides of backboard, and is contacted with each other between adjacent diffusion sheet 4, wherein near
1~2.5mm of distance between the diffusion sheet 4 and liquid crystal display panel 5 of nearly liquid crystal display panel 5.
Preferably, the economical direct type backlight assembly, multiple diffusion sheets 4 in direct type backlight assembly are diffused
Diffusion sheet 41, light collecting type diffusion sheet 42 individually or both Hybrid assembling form.41 main function of diffused diffusion sheet is more concentrated partially
The raising to light luminance is concentrated on to the effect with the uniform diffusion to light luminance, light collecting type diffusion sheet 42, so, assembling
Producer can the requirement according to client to backlight assembly emitting brightness and the light source uniformity rationally increase or decrease diffusivity diffusion sheet
41, the usage quantity of light collecting type diffusion sheet 42.
Preferably, the economical direct type backlight assembly, diffused diffusion sheet 41 include diffusion sheet ontology 411 and are located at
41 first surfaces of diffused diffusion sheet, that is, entering light face regular polygon groove 412, second surface, that is, light-emitting surface lenticular protrusion
413 compositions, wherein lenticular 413 one directions of protrusion are continuously arranged in the light-emitting surface of diffused diffusion sheet 41, and regular polygon is recessed
Slot 412 is towards second surface indent.
Preferably, the economical direct type backlight assembly, the regular polygon groove 412 and lenticular are 413 pairs raised
Middle position setting, wherein regular polygon groove 412 is formed and is tilted by multiple isosceles trapezoid enclosings for favouring groove center
The angle of isosceles trapezoid and groove center axis is 45 °~55 °, and inclined regular polygon groove 412 is convenient for molding.
Light is injected by 412 side of regular polygon groove, is projected by raised 413 sides of lenticular, is spread, mention by multistage
Make that the light distributed is softer, avoids dazzling phenomenon while bloom line use ratio.
Preferably, the economical direct type backlight assembly, light collecting type diffusion sheet 42 include the first extexine 421, second
Extexine 422, middle layer 423, wherein the material of the first and second extexine 421,422, thickness are all the same, the first extexine 421
Equipped with the strip projected parts that section is triangle to assemble light luminance, 423 surface of the second extexine can be smooth flat, flower on surface
Line face, wherein patterned surface includes orange peel line, frosted line, diamond texture, these decorative patterns can effectively prevent diffusion sheet surface to be scraped off just
It is installed in the contact of multiple diffusion sheets 4, middle layer 423, which adds light diffusing agent by transparent substrate and in transparent substrate, makes incidence
Light uniformly spread.
Preferably, the economical direct type backlight assembly, light collecting type diffusion sheet 42 include the first extexine 421, second
Extexine 422, middle layer 423, wherein the material of the first and second extexine 421,422, thickness are all the same, the first extexine 421
It is arc-shaped strip projected parts to assemble light luminance that surface, which is equipped with section, and 423 surface of the second extexine can be smooth flat, flower
Line face, wherein patterned surface includes orange peel line, frosted line, diamond texture, these decorative patterns can effectively prevent diffusion sheet surface to be scraped off just
It is installed in the contact of multiple diffusion sheets 4, middle layer 423, which adds light diffusing agent by transparent resin and in transparent resin, makes incidence
Light uniformly spread.
Preferably, the economical direct type backlight assembly, strip is convex in the first extexine 421 in light collecting type diffusion sheet 42
A length of 230mm~the 330mm in cross section bottom edge risen, a height of 120mm~150mm, light collecting type diffusion sheet 42 can be by backlight assembly
Area source luminance improves 7%~13% or so, and economical direct type backlight assembly is avoided to cause because of the focusing light effect of no prismatic lens
The reduction of positive light luminance meets the needs of to light-source brightness on the basis of cost reduction.
Preferably, the economical direct type backlight assembly, the first extexine 421, the second extexine 422 material in wrap
Include one of functional materials such as anti-UV, antistatic, foaming or a variety of, wherein anti-UV agent includes at least benzoic acids, hexichol first
One of ketone, antistatic agent include sulfate derivative, phosphoric acid derivatives, amine, quaternary ammonium salt, imidazoles and ethylene oxide
One or more in derivative, foaming agent includes one of chemical foaming agent, physical blowing agent and surfactant or more
Kind, preferentially use inorganic chemical foaming agent.
Preferably, the economical direct type backlight assembly, the transparent substrate in middle layer 423 be polystyrene (PS),
Polycarbonate (PC), polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyethylene terephthalate (PET), pressure
At least one of gram force (PMMA), acrylic acid (MMA), light diffusing agent is inorganic light diffusing agent, specifically, inorganic light diffusing agent
For one of barium sulfate, calcium carbonate, silica or a variety of.
Detailed description of the invention:
Specific embodiment is further described with reference to the accompanying drawing, in which:
Fig. 1 is the composition schematic diagram of economical direct type backlight assembly of the present invention；
Fig. 2 is the sectional view of the diffused diffusion sheet of economical direct type backlight assembly of the present invention；
Fig. 3 is the sectional view of the light collecting type diffusion sheet of economical direct type backlight assembly of the present invention；
Fig. 4 is the sectional view of the light collecting type diffusion sheet of economical direct type backlight assembly of the present invention；
It is as follows to number corresponding specific structure:
The present invention that the following detailed description will be further explained with reference to the above drawings.
Specific embodiment
Case 1 is embodied:
A kind of economical direct type backlight assembly, comprising: backboard 1, reflecting plate 2, backlight 3, diffusion sheet 4, diffusion sheet 4
Quantity is 2~4, and reflecting plate 2 is mounted on the medial surface of backboard 1, and the top position of reflecting plate 2 is arranged in backlight 3, passes through reflection
The light that backlight 3 shoots to rear and two sides is reflected into the diffusion sheet 4 of front by plate 2, via treated the face light of diffusion sheet 4
Source is supplied to the liquid crystal display panel 5 for being placed in 4 front of diffusion sheet, and the two sides of backboard 1 are equipped with buckle identical with the quantity of diffusion sheet 4
Slot, diffusion sheet 4 are placed in the buckle slot of 1 two sides of backboard, and are contacted with each other between adjacent diffusion sheet 4, wherein near liquid crystal
1~2.5mm of distance between the diffusion sheet 4 and liquid crystal display panel 5 of panel 5.
Further, multiple diffusion sheets 4 in direct type backlight assembly are all made of diffused diffusion sheet 41.Wherein,
Diffused diffusion sheet 41 is including diffusion sheet ontology 411 and positioned at 41 first surfaces of diffused diffusion sheet, that is, entering light face regular polygon
Groove 412, second surface, that is, light-emitting surface lenticular protrusion 413 form, wherein lenticular protrusion 413 is continuously arranged in Y direction
It is listed in the light-emitting surface of diffused diffusion sheet 41, regular polygon groove 412 is towards second surface indent.Preferably, described just polygon
Connected in star 412 and raised 413 center positions of lenticular are arranged, and wherein regular polygon groove 412 favours groove center by multiple
It is 45 °~55 ° that the isosceles trapezoid at place, which encloses and forms and tilt the angle of isosceles trapezoid and groove center axis, inclined just polygon
Connected in star 412 is convenient for molding.
After prismatic lens are all converted to diffusion sheet 4 by the economical direct type backlight assembly in the present embodiment, cost is dropped
Low 20%~40% or so, while light source fixed is determined uniformity coefficient and is greatly promoted, the soft generation without dazzling phenomenon of light, back
The brightness of optical assembly reaches 200-210cd/m2, fully meet the demand of family market.
Case 2 is embodied:
A kind of economical direct type backlight assembly, comprising: backboard 1, reflecting plate 2, backlight 3, diffusion sheet 4, diffusion sheet 4
Quantity is 2~4, and reflecting plate 2 is mounted on the medial surface of backboard 1, and the top position of reflecting plate 2 is arranged in backlight 3, passes through reflection
The light that backlight 3 shoots to rear and two sides is reflected into the diffusion sheet 4 of front by plate 2, via treated the face light of diffusion sheet 4
Source is supplied to the liquid crystal display panel 5 for being placed in 4 front of diffusion sheet, and the two sides of backboard 1 are equipped with buckle identical with the quantity of diffusion sheet 4
Slot, diffusion sheet 4 are placed in the buckle slot of 1 two sides of backboard, and are contacted with each other between adjacent diffusion sheet 4, wherein near liquid crystal
1~2.5mm of distance between the diffusion sheet 4 and liquid crystal display panel 5 of panel 5.
Further, multiple diffusion sheets 4 in direct type backlight assembly are all made of concentrated diffusion sheet 42.Light collecting type
Diffusion sheet 42 includes the first extexine 421, the second extexine 422, middle layer 423, wherein first and second extexine 421,422
Material, thickness are all the same, and the surface of the first extexine 421 is equipped with strip projected parts that section is triangle to assemble light luminance,
Second extexine, 423 surface can be smooth flat, patterned surface, and wherein patterned surface includes orange peel line, frosted line, diamond texture, these
Decorative pattern can effectively prevent diffusion sheet surface to be scraped off convenient for the contact installation of multiple diffusion sheets 4, and middle layer 423 is by transparent substrate
And adding light diffusing agent in transparent substrate spreads incident light uniformly, the first extexine in light collecting type diffusion sheet 42
A length of 230mm~the 330mm in cross section bottom edge of strip projected parts in 421, a height of 120mm~150mm, light collecting type diffusion sheet 42 can incite somebody to action
The area source luminance of backlight assembly improves 7%~11% or so, avoids economical direct type backlight assembly gathering because of no prismatic lens
Light action leads to the reduction of positive light luminance, meets the needs of to light-source brightness on the basis of cost reduction.
It further, include the function such as anti-UV, antistatic, foaming in the material of the first extexine 421, the second extexine 422
One of energy material is a variety of, wherein anti-UV agent includes at least one of benzoic acids, benzophenone, antistatic agent
Comprising one or more in sulfate derivative, phosphoric acid derivatives, amine, quaternary ammonium salt, imidazoles and epoxyethane derivative, hair
Infusion includes one of chemical foaming agent, physical blowing agent and surfactant or a variety of, is preferentially sent out using inorganic chemistry
Infusion.
Further, the transparent substrate in middle layer 423 be polystyrene (PS), polycarbonate (PC), polyethylene (PE),
Polypropylene (PP), polyvinyl chloride (PVC), polyethylene terephthalate (PET), acryl (PMMA), in acrylic acid (MMA)
At least one, light diffusing agent be inorganic light diffusing agent, specifically, inorganic light diffusing agent be barium sulfate, calcium carbonate, silica
One of or it is a variety of.
Prismatic lens due to being all changed to light collecting type diffusion sheet by direct type backlight assembly involved in this specific embodiment
42, so the production cost of backlight assembly is greatly reduced, secondly, 42 surface triangles strip projected parts of light collecting type diffusion sheet are set
Set the reduction for making direct type backlight assembly avoid light-source brightness on the basis of cost reduction, light luminance value is in 220~
235cd/m2Between, meet the requirement of middle-size and small-size outdoor commercial client.
Specific embodiment 3:
A kind of economical direct type backlight assembly, comprising: backboard 1, reflecting plate 2, backlight 3, diffusion sheet 4, diffusion sheet 4
Quantity is 3, and reflecting plate 2 is mounted on the medial surface of backboard 1, and the top position of reflecting plate 2 is arranged in backlight 3, passes through reflecting plate 2
The light that backlight 3 shoots to rear and two sides is reflected into the diffusion sheet 4 of front, via treated the area source of diffusion sheet 4
It is supplied to the liquid crystal display panel 5 for being placed in 4 front of diffusion sheet, the two sides of backboard 1 are equipped with buckle identical with the quantity of diffusion sheet 4
Slot, diffusion sheet 4 are placed in the buckle slot of 1 two sides of backboard, and are contacted with each other between adjacent diffusion sheet 4, wherein near liquid crystal
1~2.5mm of distance between the diffusion sheet 4 and liquid crystal display panel 5 of panel 5.
Further, multiple diffusion sheets 4 in direct type backlight assembly are expanded by 1 diffused diffusion sheet, 41,2 concentrated
Discrete piece 42 forms.Wherein, diffused diffusion sheet 41 is including diffusion sheet ontology 411 and positioned at 41 first surface of diffused diffusion sheet
The regular polygon groove 412 in entering light face, second surface, that is, light-emitting surface lenticular protrusion 413 form, and lenticular protrusion 413 is in X
Axis direction continuous arrangement is in the light-emitting surface of diffused diffusion sheet 41, and regular polygon groove 412 is towards second surface indent.Light collecting type
Diffusion sheet 42 includes the first extexine 421, the second extexine 422, middle layer 423, wherein first and second extexine 421,422
Material, thickness are all the same, and it is arc-shaped strip projected parts, 423 surface of the second extexine that the surface of the first extexine 421, which is equipped with section,
It can be smooth flat, patterned surface, wherein patterned surface includes orange peel line, frosted line, diamond texture, these decorative patterns can effectively prevent spreading
The contact installation that piece surface is scraped off convenient for multiple diffusion sheets 4, middle layer 423 are added by transparent substrate and in transparent substrate
Light diffusing agent spreads incident light uniformly, in light collecting type diffusion sheet 42 in first extexine 421 strip projected parts cross
A length of 230mm~the 330mm in section bottom edge, a height of 120mm~150mm, light collecting type diffusion sheet 42 can be by the area sources of backlight assembly
Luminance improves 7%~11% or so, and economical direct type backlight assembly is avoided to lead to positive light because of the focusing light effect of no prismatic lens
The reduction of line brightness.
Further, the regular polygon groove 412 is arranged with raised 413 center positions of lenticular, wherein regular polygon
Groove 412 is enclosed by multiple isosceles trapezoids for favouring groove center and forms and tilt isosceles trapezoid and groove center axis
Angle is 45 °~55 °, and inclined regular polygon groove 412 is convenient for molding.
It further, include the function such as anti-UV, antistatic, foaming in the material of the first extexine 421, the second extexine 422
One of energy material is a variety of, wherein anti-UV agent includes at least one of benzoic acids, benzophenone, antistatic agent
Comprising one or more in sulfate derivative, phosphoric acid derivatives, amine, quaternary ammonium salt, imidazoles and epoxyethane derivative, hair
Infusion includes one of chemical foaming agent, physical blowing agent and surfactant or a variety of, is preferentially sent out using inorganic chemistry
Infusion.
Further, the transparent substrate in middle layer 423 be polystyrene (PS), polycarbonate (PC), polyethylene (PE),
Polypropylene (PP), polyvinyl chloride (PVC), polyethylene terephthalate (PET), acryl (PMMA), in acrylic acid (MMA)
At least one, light diffusing agent be inorganic light diffusing agent, specifically, inorganic light diffusing agent be barium sulfate, calcium carbonate, silica
One of or it is a variety of.
Diffusion sheet in direct type backlight assembly involved in this specific embodiment is expanded by diffused diffusion sheet 41, light collecting type
42 Hybrid assembling of discrete piece forms, and greatly reduces the production cost of backlight assembly, secondly, circular arc profile bar in light collecting type diffusion sheet 42
It is bright that the setting of shape protrusion makes direct type backlight assembly avoid light source on the basis of reducing cost, guaranteeing light-source brightness uniformity
The reduction of degree, light luminance value are in 220~230cd/m2Between, meet the requirement of middle-size and small-size outdoor commercial client.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of economical direct type backlight assembly, backboard, reflecting plate, backlight, diffusion sheet, the quantity of diffusion sheet are 2~4,
Reflecting plate is mounted on the medial surface of backboard, and the top position of reflecting plate is arranged in backlight, is shot to backlight by reflecting plate
The light of rear and two sides is reflected into the diffusion sheet of front, in front of diffusion sheet treated area source directive diffusion sheet
Liquid crystal display panel.
2. economical direct type backlight assembly as described in claim 1, it is characterised in that: backboard two sides are equipped with and diffusion the piece number
Identical buckle slot is measured, diffusion sheet is placed in the buckle slot of backboard two sides, and is contacted with each other between adjacent diffusion sheet, wherein most
1~2.5mm of distance between the diffusion sheet and liquid crystal display panel of liquid crystal display panel.
3. economical direct type backlight assembly as described in claim 1, it is characterised in that: multiple expansions in direct type backlight assembly
All diffused diffusion sheets of discrete piece or by diffused diffusion sheet, can also be formed by two kinds of diffusion sheet Hybrid assembling.
4. economical direct type backlight assembly as claimed in claim 3, it is characterised in that: diffused diffusion sheet includes diffusion sheet sheet
Body and convex positioned at the diffused diffusion sheet first surface, that is, regular polygon groove in entering light face, second surface, that is, light-emitting surface lenticular
Play composition, wherein lenticular protrusion one direction is continuously arranged in the light-emitting surface of diffused diffusion sheet, regular polygon groove direction
Second surface indent.
5. economical direct type backlight assembly as claimed in claim 4, it is characterised in that: the regular polygon groove and lenticular
Raised center position setting, wherein regular polygon groove is formed and is inclined by multiple isosceles trapezoid enclosings for favouring groove center
The angle of oblique isosceles trapezoid and groove center axis is 45 °~55 °.
6. economical direct type backlight assembly as claimed in claim 3, it is characterised in that: light collecting type diffusion sheet includes the first appearance
Layer, the second extexine, middle layer, wherein the material of the first and second extexine, thickness are all the same, the surface of the first extexine is equipped with
Section is the strip projected parts of triangle, and the second outer skin surface can be smooth flat, patterned surface, and wherein patterned surface includes orange peel
Line, frosted line, diamond texture, middle layer, which adds light diffusing agent by transparent substrate and in transparent substrate, carries out incident light
Even diffusion.
7. economical direct type backlight assembly as claimed in claim 6, it is characterised in that: the strip-shaped surface protrusion of the first extexine
Cross section can also be radiused cross-section.
8. the economical direct type backlight assembly as described in any in claim 6 or 7, it is characterised in that: in light collecting type diffusion sheet
The triangle of strip projected parts or circular arc cross section bottom edge a length of 230mm~330mm, a height of 120mm in first extexine~
150mm。
9. economical direct type backlight assembly as claimed in claim 6, it is characterised in that: the first extexine, the second extexine
It include one of functional materials such as anti-UV, antistatic, foaming or a variety of in material, wherein anti-UV agent includes at least benzoic acid
One of class, benzophenone, antistatic agent include sulfate derivative, phosphoric acid derivatives, amine, quaternary ammonium salt, imidazoles with
And it is one or more in epoxyethane derivative, foaming agent includes in chemical foaming agent, physical blowing agent and surfactant
It is one or more.
10. economical direct type backlight assembly as claimed in claim 6, it is characterised in that: the transparent substrate in middle layer is poly-
Styrene (PS), polycarbonate (PC), polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), poly terephthalic acid second two
At least one of alcohol ester (PET), acryl (PMMA), acrylic acid (MMA), light diffusing agent are inorganic light diffusing agent, specifically,
Inorganic light diffusing agent is one of barium sulfate, calcium carbonate, silica or a variety of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810064353.6A CN109001937A (en) | 2018-01-23 | 2018-01-23 | A kind of economical direct type backlight assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810064353.6A CN109001937A (en) | 2018-01-23 | 2018-01-23 | A kind of economical direct type backlight assembly |
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| CN109001937A true CN109001937A (en) | 2018-12-14 |
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| CN201810064353.6A Pending CN109001937A (en) | 2018-01-23 | 2018-01-23 | A kind of economical direct type backlight assembly |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111578223A (en) * | 2020-05-22 | 2020-08-25 | 浙江亮心汽车部件有限公司 | Light-gathering signal lamp module and light-gathering lens thereof |
| CN112147161A (en) * | 2020-09-29 | 2020-12-29 | 惠州高视科技有限公司 | Cambered surface detection device and cambered surface detection method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111578223A (en) * | 2020-05-22 | 2020-08-25 | 浙江亮心汽车部件有限公司 | Light-gathering signal lamp module and light-gathering lens thereof |
| CN112147161A (en) * | 2020-09-29 | 2020-12-29 | 惠州高视科技有限公司 | Cambered surface detection device and cambered surface detection method |
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