CN105334669A - Backlight module and liquid crystal display device - Google Patents
Backlight module and liquid crystal display device Download PDFInfo
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- CN105334669A CN105334669A CN201510902245.8A CN201510902245A CN105334669A CN 105334669 A CN105334669 A CN 105334669A CN 201510902245 A CN201510902245 A CN 201510902245A CN 105334669 A CN105334669 A CN 105334669A
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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
- 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
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
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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
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- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a backlight module and a liquid crystal display device, and relates to the technical field of liquid crystal display. The problem that bright spots exist in a direct-type backlight module locally can be effectively solved. The backlight module comprises LED light-emitting chips and a prismatic lens. The prismatic lens comprises a substrate and a microprism structure arranged on the substrate. The microprism structure comprises triangular prism microstructures of a first type and triangular prism microstructures of a second type. The vertex angle of the cross section of each prism microstructure of the first type is lager than the vertex angle of the cross section of each prism microstructure of the second type, the reflecting effect of the triangular prism microstructures of the second type on small-angle light emitted by the LED light-emitting chips is larger than the refracting effect, and therefore the problem that bright spots exist in the backlight module locally can be effectively relieved or even eliminated. The backlight module is applied to the liquid crystal display device.
Description
Technical field
The present invention relates to technical field of liquid crystal display, particularly relate to a kind of backlight module and liquid crystal display.
Background technology
Liquid crystal display comprise for display image content LCD and the backlight module of white light source is provided to LCD.Different relative to the position of LCD according to light source, backlight module is mainly divided into side-light type and straight-down negative.Wherein, the light source of down straight aphototropism mode set is positioned at immediately below LCD.
Example, as shown in Figure 1, a kind of typical structure schematic diagram of down straight aphototropism mode set in prior art, shown in figure 1, down straight aphototropism mode set 100 mainly comprises backboard 101, be arranged on the reflector plate 102 of backboard 101 inside surface, be arranged on multiple LED luminescence chips 103 on reflector plate 102 surface, be arranged on the diffuser plate 105 above LED luminescence chip 103 and the prismatic lens 106 and other blooming pieces 107 that are arranged on diffuser plate 105 upper surface, wherein, the effect of prismatic lens 106 is the intensity improving backlight module exiting surface emergent light, concrete, the refraction action of the micro-prism structure be formed on backing material is utilized to make to deflect to frontal outgoing from the emergent light in a certain angular range of diffuser plate 105, like this, the light that light source sends constantly is recycled under the effect of micro-prism structure, originally the light dispersed to all directions is controlled in the view directions of front after by prismatic lens, thus reach the effect of brightness enhancing.Therefore, prismatic lens 105 is called brightness enhancement film again, and the xsect drift angle of its micro-prism structure is 90 ° usually, now, the convergence effect of light after prismatic lens 105 reflects in the angular field of view of backlight module front that script is dispersed to all directions is good, and accordingly, the brightening effect of prismatic lens 105 is good.
Adopt the down straight aphototropism mode set of structure shown in Fig. 1, be occasionally found the light ratio just prismatic lens 106 place above LED luminescence chip 103 reflected more, as shown in Figure 2, cause the local of down straight aphototropism mode set to occur speck 108, cause subjective bad.
Summary of the invention
Embodiments of the invention provide a kind of backlight module and liquid crystal display, effectively can solve the problem that down straight aphototropism mode set local exists speck.
For achieving the above object, embodiments of the invention provide a kind of backlight module, comprise LED luminescence chip and prismatic lens, described prismatic lens is arranged on above described LED luminescence chip, the micro-prism structure that described prismatic lens comprises base material and arranges on the substrate, described micro-prism structure comprises first kind triangular prism micro-structure and Equations of The Second Kind triangular prism micro-structure, and the xsect drift angle of described first kind triangular prism micro-structure is greater than the xsect drift angle of described Equations of The Second Kind triangular prism micro-structure.
Usually, the low-angle light that LED luminescence chip sends is after the exiting surface of triangular prism micro-structure reflects, converge in the front angular field of view of backlight module exiting surface, the degree of divergence of the low-angle light sent due to LED luminescence chip is low, and then be partially formed speck at backlight module, and the backlight module of the embodiment of the present invention, the micro-prism structure that its prismatic lens comprises base material and arranges on the substrate, described micro-prism structure comprises the triangular prism micro-structure that xsect drift angle is two kinds of different angles, wherein, the xsect drift angle of first kind triangular prism micro-structure is greater than the xsect drift angle of Equations of The Second Kind triangular prism micro-structure, because the xsect drift angle of triangular prism micro-structure is less, the probability that the low-angle light that LED luminescence chip sends, at its exiting surface, total reflection occurs is larger, the reflex of Equations of The Second Kind triangular prism micro-structure to the low-angle light that LED luminescence chip sends is greater than refraction action, shown in figure 7, the low-angle light that LED luminescence chip sends is totally reflected at the exiting surface of Equations of The Second Kind triangular prism micro-structure, after changing the direction of propagation, again after the exiting surface refraction and reflection of opposite side, its refraction and reflected light be not all within the scope of the hot spot corresponding to backlight module exiting surface, effectively can solve the problem that backlight module local exists speck.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the back light module unit structure schematic diagram of prior art;
Fig. 2 is the hot spot schematic diagram of backlight module in Fig. 1;
A kind of back light module unit structure schematic diagram that Fig. 3 provides for the embodiment of the present invention;
Fig. 4 is backlight module echo area and the blast district distribution schematic diagram of the embodiment of the present invention;
Fig. 5 is the light structural representation of the backlight module of the embodiment of the present invention;
Fig. 6 is a kind of prism Sheet structure schematic diagram of the embodiment of the present invention;
Fig. 6 a is the another kind of prism Sheet structure schematic diagram of the embodiment of the present invention;
Fig. 6 b is the another kind of prism Sheet structure schematic diagram of the embodiment of the present invention;
Fig. 7 is that the backlight module hot spot of the embodiment of the present invention forms schematic diagram;
Fig. 8 is the light schematic diagram of the backlight module first kind triangular prism micro-structure of the embodiment of the present invention;
Fig. 9 is the light schematic diagram of the backlight module Equations of The Second Kind triangular prism micro-structure of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Find, down straight aphototropism mode set as shown in Figure 1 occasionally have local to occur the bad problem of the subjectivity of speck based on inventor.Analyze and produce the reason of the problems referred to above and be, the exiting light beam intensity above LED luminescence chip 103 is excessive compared with other places, causes down straight aphototropism mode set just to occurring local speck above LED luminescence chip 103.Further research finds, the light sent due to LED luminescence chip 103 is similar to Lambertian radiator, its emission maximum angle is 120 °, between its light and normal of exiting surface, angle is 0 ° ~ 60 °, namely beam angle is 0 ° ~ 60 °, light in low-angle beam angle is wherein dispersed fully in the process arriving backlight module exiting surface, and then causes local and occur speck.
In prior art, inventor finds, usual employing increases the distance between LED luminescence chip to backlight module exiting surface or in down straight aphototropism mode set, arranges the means such as diffuser plate and diffusion sheet, but, the distance increased between LED luminescence chip to backlight module exiting surface will certainly cause the thickness of down straight aphototropism mode set larger, simultaneously, if arrange diffuser plate in down straight aphototropism mode set, the mist degree of diffuser plate is utilized to carry out covering speck, the brightness of backlight module will certainly be caused to reduce, weight and the cost of down straight aphototropism mode set can be increased simultaneously, this is all unfavorable for the lightening development of liquid crystal display.
For solving the problem, the embodiment of the present invention provides a kind of backlight module and liquid crystal display, comprise LED luminescence chip and prismatic lens, described prismatic lens is arranged on above described LED luminescence chip, the micro-prism structure that described prismatic lens comprises base material and arranges on the substrate, described micro-prism structure comprises first kind triangular prism micro-structure and Equations of The Second Kind triangular prism micro-structure, the xsect drift angle of described first kind triangular prism micro-structure is greater than the xsect drift angle of described Equations of The Second Kind triangular prism micro-structure, effectively can solve the problem that backlight module local exists speck.
The structural representation of what Fig. 3 was exemplary show a kind of backlight module of the embodiment of the present invention.This backlight module can provide white light source for liquid crystal display, is assembled into liquid crystal display with LCD.
Shown in figure 3, the backlight module 200 that the embodiment of the present invention provides, mainly comprises backboard 201, LED luminescence chip 203, prismatic lens 206 and other blooming pieces 207, and the space between its dorsulum 201 and prismatic lens 206 forms mixed light space 204.Example, backboard 201 is a frame structure, and prismatic lens 206 is arranged on its surrounding along sidewall, and LED luminescence chip 203 is arranged on bottom it.
Example, shown in figure 3, other blooming pieces 207 are arranged on above prismatic lens 206, meanwhile, other blooming pieces 207 can also be arranged on below prismatic lens 206 or scattering device in prismatic lens about 206 both sides.Example, other blooming pieces 207 can be the diffusion sheet, diffusion barrier, quantum film etc. of backlight module, and other blooming pieces 207 can be a kind of diaphragms wherein, also can be the combinations of wherein multiple diaphragm.
Further, shown in figure 6, the micro-prism structure 2064 that prismatic lens 206 comprises base material 2063 and is arranged on base material 2063, wherein, the xsect of micro-prism structure 2064 is isosceles triangle, micro-prism structure 2064 comprises first kind triangular prism micro-structure 20641 and Equations of The Second Kind triangular prism micro-structure 20642, and wherein the xsect drift angle of first kind triangular prism micro-structure 20641 is θ
1, the xsect drift angle of Equations of The Second Kind triangular prism micro-structure 20642 is θ
2.
Shown in figure 4, the backlight module 200 that the embodiment of the present invention provides, its prismatic lens 206 comprises several echo areas 2062 and blast district 2061, wherein, shown in figure 5, the optical energy density that the LED luminescence chip 203 that echo area 2062 receives sends is greater than the optical energy density that LED luminescence chip 203 that blast district 2061 receives sends.Shown in figure 4, Fig. 5 and Fig. 6, in echo area 2062, be provided with Equations of The Second Kind triangular prism micro-structure 20642.
Concrete, the light that LED luminescence chip 203 sends is similar to Lambertian radiator, and its emission maximum angle is 120 °, and its radiative scope is as shown in Figure 5.Shown in figure 5, prismatic lens 206 is positioned at the region directly over LED luminescence chip 203, the angle changing rate that the LED luminescence chip 203 received sends light is little, under identical light mixing distance, its degree of divergence is low, the optical energy density causing the areas accept directly over LED luminescence chip 203 to arrive is comparatively large, and therefore, the speck of backlight module appears at directly over LED luminescence chip usually.
Further, echo area 2062 and blast district 2061 are distributed in respectively near LED luminescence chip 203 and the position away from LED luminescence chip 203, and wherein, example, shown in figure 4, echo area 2062 is distributed in directly over LED luminescence chip 203.
Shown in figure 7, LED luminescence chip 203 is r at the speck radius that backlight module exiting surface produces, the light mixing distance of this backlight module is H, the maximum angle of light 1. and between the exiting surface normal of LED luminescence chip 203 that LED luminescence chip 203 produces speck is α, the cirtical angle of total reflection of micro-prism structure 2064 exiting surface is β, the refractive index of micro-prism structure 2064 material is n, then:
Shown in figure 7, θ be between the exiting surface normal of LED luminescence chip 203 angle be the light of α 1. when the exiting surface of micro-prism structure 2064 occurs to be totally reflected, the critical value of micro-prism structure 2064 xsect angle.When micro-prism structure 2064 xsect angle is greater than θ, 1. be there is refraction and reflection by light in the exiting surface at micro-prism structure 2064, forms hot spot at the exiting surface of backlight module; When micro-prism structure 2064 xsect angle is less than θ, 1. exiting surface at micro-prism structure 2064 is totally reflected by light, after changing the direction of propagation, then after the exiting surface refraction and reflection of opposite side, its refraction and reflected light be not all within the scope of the hot spot corresponding to backlight module exiting surface.Wherein, can obtain according to angle sum of a triangle theorem:
Wherein, shown in figure 7,
for the angle between the exiting surface of micro-prism structure 2064 and normal, then
,
.
Example, for the backlight module of light mixing distance H=30mm, the speck radius that its exiting surface produces is r=15mm, and the refractive index of micro-prism structure 2064 material is n=1.5, then:
Further, shown in figure 7, if and angle is that the light of α is totally reflected at the exiting surface of micro-prism structure 2064 between the exiting surface normal of LED luminescence chip 203, the light that angle is less than α then and between the exiting surface normal of LED luminescence chip 203 is all totally reflected at the exiting surface of micro-prism structure 2064, after changing the direction of propagation, again after the exiting surface refraction and reflection of opposite side, its refraction and reflected light, all not within the scope of the hot spot corresponding to backlight module exiting surface, can reduce even to eliminate the problem that backlight module local exists speck.
Shown in figure 6, Fig. 7, Fig. 8 and Fig. 9, the backlight module 200 of the embodiment of the present invention, the xsect vertex angle theta of its first kind triangular prism micro-structure 20641
1be greater than θ, the xsect vertex angle theta of Equations of The Second Kind triangular prism micro-structure 20642
2be less than or equal to θ, that is:
Shown in figure 8, the backlight module that the embodiment of the present invention provides, due to the xsect vertex angle theta of first kind triangular prism micro-structure 20641
1be greater than θ, and the light that between the exiting surface normal of LED luminescence chip 203, angle is less than or equal to α occurs to reflect and reflect at the exiting surface of first kind triangular prism micro-structure 20641, the intensity of refract light is greater than the intensity of reflected light, namely the anaclasis that first kind triangular prism micro-structure 20641 pairs of LED luminescence chips 203 send is greater than reflection, as shown in Figure 8, the light reflected is positioned at the hot spot scope corresponding to backlight module exiting surface.
Shown in figure 9, due to the xsect vertex angle theta of Equations of The Second Kind triangular prism micro-structure 20642
2be less than or equal to θ, and the light that between the exiting surface normal of LED luminescence chip 203, angle is less than or equal to α is totally reflected at the exiting surface of Equations of The Second Kind triangular prism micro-structure 20641, now, intensity of reflected light is greater than refractive optical power, namely the light reflection that Equations of The Second Kind triangular prism micro-structure 20642 pairs of LED luminescence chips 203 send is greater than refraction, as shown in Figure 9, and the light that between the exiting surface normal of LED luminescence chip 203, angle is less than or equal to α finally reflects through the exiting surface of opposite side and reflects again, refraction and the light after reflecting is not all within the scope of the hot spot corresponding to backlight module exiting surface.
Shown in figure 8 and Fig. 9, the backlight module that the embodiment of the present invention provides, due to LED luminescence chip 203 exiting surface normal between the angle light that is less than or equal to α there is refraction and reflection at the exiting surface of first kind triangular prism micro-structure 20641, be totally reflected at the exiting surface of Equations of The Second Kind triangular prism micro-structure 20641, so, the refraction that first kind triangular prism micro-structure 20641 pairs of LED luminescence chips 203 send light is greater than the refraction that Equations of The Second Kind triangular prism micro-structure 20642 pairs of LED luminescence chips 203 send light, namely the brightening effect of first kind triangular prism micro-structure 20641 is better than the brightening effect of Equations of The Second Kind triangular prism micro-structure.
In sum, the optical energy density that the LED luminescence chip 203 that echo area 2062 receives sends is greater than the optical energy density that LED luminescence chip 203 that blast district 2061 receives sends, and the angle of the light that sends of the LED luminescence chip 203 that echo area 2062 receives and LED luminescence chip 203 exiting surface normal is smaller, easily speck is formed in backlight module exiting surface corresponding to echo area 2062, but, the backlight module 200 of the embodiment of the present invention, Equations of The Second Kind triangular prism micro-structure 20642 is provided with in its echo area 2062, the light reflection that Equations of The Second Kind triangular prism micro-structure 20642 pairs of LED luminescence chips 203 send is greater than refraction, between that sent by LED the luminescence chip 203 and exiting surface normal of LED luminescence chip 203, angle is less than or equal to the light of α, all be totally reflected at the exiting surface of Equations of The Second Kind triangular prism micro-structure 20641, final again through exiting surface refraction and the reflection of opposite side, as shown in Figure 9, the light of refraction and reflection is not all within the scope of the hot spot corresponding to backlight module exiting surface, light luminance in region corresponding to the echo area 2062 reducing backlight module 200, can effectively reduce and even eliminate the problem that backlight module local exists speck.
Further, shown in figure 6, the backlight module 200 that the embodiment of the present invention provides, the xsect drift angle of its first kind triangular prism micro-structure 20642 is 85o ~ 95o, the xsect drift angle of Equations of The Second Kind triangular prism micro-structure 20641 is 5o ~ 60o, wherein, preferably, the xsect drift angle of first kind triangular prism micro-structure 20642 is 90o, the anaclasis that first kind triangular prism micro-structure 20641 pairs of LED luminescence chips 203 send is greater than reflection, its major function is blast, a large amount of experiments finds, when the xsect drift angle of the triangular prism micro-structure of prismatic lens is 90o, the convergence effect of its refract light is best, namely brightening effect is best.
Further, shown in figure 6a and Fig. 6 b, the backlight module 200 that the embodiment of the present invention provides, its first kind triangular prism micro-structure 20641 is spaced apart on base material 2063 with Equations of The Second Kind triangular prism micro-structure 20642.Concrete, be provided with between adjacent first kind triangular prism micro-structure 20641 between at least one Equations of The Second Kind triangular prism micro-structure 20642 or adjacent Equations of The Second Kind triangular prism micro-structure 20642 and be provided with at least one first kind triangular prism micro-structure 20641.Example, shown in figure 6a, between adjacent first kind triangular prism micro-structure 20641, be provided with two Equations of The Second Kind triangular prism micro-structures 20642; Shown in figure 6b, between Equations of The Second Kind triangular prism micro-structure 20642, be provided with one or two first kind triangular prism micro-structure 20641.Certainly, only illustrate herein, do not represent first kind triangular prism micro-structure and the regularity of distribution of Equations of The Second Kind triangular prism micro-structure on base material is confined to this.
Further, shown in figure 6, the backlight module 200 that the embodiment of the present invention provides, its first kind triangular prism micro-structure 20641 and Equations of The Second Kind triangular prism micro-structure 20642 stochastic distribution on base material 2063.The micro-prism structure 2064 of prismatic lens 206 is generally nanoscale, namely first kind triangular prism micro-structure 20641 and Equations of The Second Kind triangular prism micro-structure 20642 are nanoscale structures, therefore, no matter first kind triangular prism micro-structure 20641 adopts spaced apart or stochastic distribution with Equations of The Second Kind triangular prism micro-structure 20642 on base material 2063, can ensure to be provided with Equations of The Second Kind triangular prism micro-structure 20642 in its echo area 2062.Wherein, adopt spaced apart, facilitate the manufacture of triangular prism micro-structure graphic arts die, can effectively avoid triangular prism micro-structure to concentrate in local distribution simultaneously, improve the homogeneity of backlight module exiting surface light.
Further, the backlight module 200 of the embodiment of the present invention, the glossiness of its reflector plate 202 is 0.05 ~ 0.6, the glossiness of reflector plate 202 is lower, reflector plate 202 occurs irreflexive light more, the light that LED luminescence chip sends, the degree of divergence after prismatic lens 204 and reflector plate 202 reflect is higher, accordingly, backlight module exiting surface occurs that the probability of speck is less.
The embodiment of the present invention also provides a kind of liquid crystal display, comprises the backlight module shown in LCD and Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 6 a, Fig. 6 b, Fig. 7, Fig. 8 and Fig. 9, has the advantage of backlight module shown in Fig. 2 ~ Fig. 9.
About the backlight module of the embodiment of the present invention and other formations of liquid crystal display etc. known by those skilled in the art, with reference to the state of the art, no longer can describe in detail at this.
In the description of this instructions, specific features, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (10)
1. a backlight module, comprise LED luminescence chip and prismatic lens, described prismatic lens is arranged on above described LED luminescence chip, it is characterized in that, the micro-prism structure that described prismatic lens comprises base material and arranges on the substrate, described micro-prism structure comprises first kind triangular prism micro-structure and Equations of The Second Kind triangular prism micro-structure, and the xsect drift angle of described first kind triangular prism micro-structure is greater than the xsect drift angle of described Equations of The Second Kind triangular prism micro-structure.
2. backlight module according to claim 1, it is characterized in that, the xsect of described first kind triangular prism micro-structure and described Equations of The Second Kind triangular prism micro-structure is isosceles triangle, the xsect drift angle of described first kind triangular prism micro-structure is 85o ~ 95o, and the xsect drift angle of described Equations of The Second Kind triangular prism micro-structure is 5o ~ 60o.
3. backlight module according to claim 1, it is characterized in that, the xsect drift angle of described first kind triangular prism micro-structure is greater than
, the xsect drift angle of described Equations of The Second Kind triangular prism micro-structure is less than or equal to
, wherein:
In formula:
for the speck radius of described backlight module exiting surface,
for the light mixing distance of backlight module,
for the refractive index of described micro-prism structure.
4. backlight module according to any one of claim 1 ~ 3, is characterized in that, described first kind triangular prism micro-structure and described Equations of The Second Kind triangular prism micro-structure spaced apart or stochastic distribution on the substrate.
5. backlight module according to any one of claim 1 ~ 4, it is characterized in that, described prismatic lens is provided with echo area and blast district, the optical energy density that described echo area receives is greater than the optical energy density that described blast district receives, and described echo area is provided with described Equations of The Second Kind triangular prism micro-structure.
6. backlight module according to claim 1, it is characterized in that, described backlight module is provided with reflector plate, and described reflector plate is arranged on below described LED luminescence chip exiting surface, and the glossiness of described reflector plate is 0.05 ~ 0.6.
7. a backlight module, comprise LED luminescence chip and prismatic lens, described prismatic lens is arranged on above described LED luminescence chip, it is characterized in that, the micro-prism structure that described prismatic lens comprises base material and arranges on the substrate, described micro-prism structure comprises first kind triangular prism micro-structure and Equations of The Second Kind triangular prism micro-structure, described first kind triangular prism micro-structure is greater than to the refraction that described LED luminescence chip sends light described Equations of The Second Kind triangular prism micro-structure to send light refraction to described LED luminescence chip, described prismatic lens is provided with echo area and blast district, the optical energy density that described echo area receives is greater than the optical energy density that described blast district receives, described echo area is provided with described Equations of The Second Kind triangular prism micro-structure.
8. backlight module according to claim 7, it is characterized in that, the xsect drift angle of described first kind triangular prism micro-structure is greater than
, the xsect drift angle of described Equations of The Second Kind triangular prism micro-structure is less than or equal to
, wherein:
In formula:
for the speck radius of described backlight module exiting surface,
for the light mixing distance of backlight module,
for the refractive index of described micro-prism structure.
9. backlight module according to claim 7, it is characterized in that, described backlight module is provided with reflector plate, and described reflector plate is arranged on below described LED luminescence chip exiting surface, and the glossiness of described reflector plate is 0.05 ~ 0.6.
10. a liquid crystal display, is characterized in that, described liquid crystal display comprises backlight module as described in any one of claim 1 ~ 9.
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| CN201510902245.8A CN105334669B (en) | 2015-12-09 | 2015-12-09 | A kind of backlight module and liquid crystal display |
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| CN201510902245.8A CN105334669B (en) | 2015-12-09 | 2015-12-09 | A kind of backlight module and liquid crystal display |
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| Publication Number | Publication Date |
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| CN105334669A true CN105334669A (en) | 2016-02-17 |
| CN105334669B CN105334669B (en) | 2018-12-28 |
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| CN201510902245.8A Active CN105334669B (en) | 2015-12-09 | 2015-12-09 | A kind of backlight module and liquid crystal display |
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Cited By (11)
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| CN106526973A (en) * | 2016-12-30 | 2017-03-22 | 深圳Tcl新技术有限公司 | Straight down type backlight module and liquid crystal display device |
| CN108845383A (en) * | 2018-06-26 | 2018-11-20 | 厦门天马微电子有限公司 | A kind of prismatic lens, backlight module and display device |
| CN109188772A (en) * | 2018-10-30 | 2019-01-11 | 厦门天马微电子有限公司 | A kind of backlight module and display device |
| CN109343274A (en) * | 2018-11-26 | 2019-02-15 | 厦门天马微电子有限公司 | A kind of light-enhancing structure of backlight module, backlight module and display device |
| CN109459886A (en) * | 2018-10-31 | 2019-03-12 | 厦门天马微电子有限公司 | A kind of backlight module, production method and display device |
| CN109509401A (en) * | 2019-01-17 | 2019-03-22 | 京东方科技集团股份有限公司 | Backlight, backlight module, display device and backlight source preparation method |
| CN110308591A (en) * | 2019-07-31 | 2019-10-08 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN110824776A (en) * | 2019-11-27 | 2020-02-21 | 惠州市隆利科技发展有限公司 | Direct type mini LED backlight module |
| CN111045253A (en) * | 2019-12-30 | 2020-04-21 | 华为技术有限公司 | Backlight module and liquid crystal display device |
| CN114137760A (en) * | 2020-09-04 | 2022-03-04 | 海信视像科技股份有限公司 | Display device |
| CN115712214A (en) * | 2022-12-05 | 2023-02-24 | 厦门天马微电子有限公司 | Prism film, backlight module and display device |
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| CN106526973A (en) * | 2016-12-30 | 2017-03-22 | 深圳Tcl新技术有限公司 | Straight down type backlight module and liquid crystal display device |
| CN108845383A (en) * | 2018-06-26 | 2018-11-20 | 厦门天马微电子有限公司 | A kind of prismatic lens, backlight module and display device |
| CN109188772A (en) * | 2018-10-30 | 2019-01-11 | 厦门天马微电子有限公司 | A kind of backlight module and display device |
| CN109459886A (en) * | 2018-10-31 | 2019-03-12 | 厦门天马微电子有限公司 | A kind of backlight module, production method and display device |
| CN109459886B (en) * | 2018-10-31 | 2021-11-02 | 厦门天马微电子有限公司 | Backlight module, manufacturing method and display device |
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| CN114137760A (en) * | 2020-09-04 | 2022-03-04 | 海信视像科技股份有限公司 | Display device |
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| CN115712214A (en) * | 2022-12-05 | 2023-02-24 | 厦门天马微电子有限公司 | Prism film, backlight module and display device |
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| CN105334669B (en) | 2018-12-28 |
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Address after: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee after: Hisense Video Technology Co.,Ltd. Address before: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee before: HISENSE ELECTRIC Co.,Ltd. |