CN103017085B - Mirror lens, the backlight module using this mirror lens and display device - Google Patents
Mirror lens, the backlight module using this mirror lens and display device Download PDFInfo
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- CN103017085B CN103017085B CN201210545847.9A CN201210545847A CN103017085B CN 103017085 B CN103017085 B CN 103017085B CN 201210545847 A CN201210545847 A CN 201210545847A CN 103017085 B CN103017085 B CN 103017085B
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Abstract
Mirror lens provided by the invention, the backlight module using this mirror lens and display device, wherein mirror lens comprises the mirror body of back taper mesa-shaped, the first surface that the area of mirror body is larger is exiting surface, first surface is provided with groove, toward each other, second surface and two sides are reflecting surface for the first side wall of groove and the second sidewall.Backlight module comprises diffuser plate and light supply apparatus, and light supply apparatus comprises mirror lens of the present invention and is arranged at the light source of inside of groove of mirror lens.Display device of the present invention, comprises the backlight module of use mirror lens of the present invention.Mirror lens of the present invention both can well be used for Staight downward type backlight module, can well be used for again the backlight module of corner type.The backlight module of use mirror lens of the present invention not only reaches the effect expanding rising angle, can also mate luminous light source down, itself have better bright dipping quality.Display device of the present invention, because adopt backlight module of the present invention, can improve the display quality of self greatly.
Description
Technical field
The present invention relates to display technique field, particularly relate to a kind of mirror lens, use the backlight module of this mirror lens and display device.
Background technology
Backlight module is one of significant components of liquid crystal display, and because liquid crystal itself is not luminous, the function of backlight module is exactly well-off brightness and the light source be evenly distributed, and makes the normal show image of liquid crystal display energy.At present, the display technique of liquid crystal display has been tending towards ripe, especially there has also been very large development at the design aspect of backlight module.Backlight module, except being applied in the liquid crystal indicator such as liquid crystal display, liquid crystal TV set, can also provide light source for display device such as digital album (digital photo frame), Electronic Paper, mobile phones.
At present, the design of LED-backlit module adopts transmissive design substantially, and namely the light-emitting area of the light-emitting area of the LED incidence surface or LED that face light guide plate faces diffuser plate upward.And problem as described below is had in transmission-type LED-backlit module: first, in LED corner type back light module unit structure: along with the demand constantly declined to LED-backlit module power consumption, there is the structure of corner LED-backlit module at present on the market, the feature that corner formula LED-backlit module is given prominence to the most is exactly the number that a large amount of reduction LED uses, but this corner formula LED-backlit module needs very wide light-emitting area, therefore, required LED is long narrow.And this long narrow LED etc. have higher PN and save temperature, and power is relatively large, and being heated for a long time easily appears in the incidence surface part of light guide plate and to melt distortion etc. bad.Secondly, in LED Staight downward type backlight modular structure: occurred the Development Scheme substituting CCFL with LED lamp bar in the market, but in order to make up the limited shortcoming of LED lighting angle, need to be dispersed even light by adding circular secondary lens, but prices are rather stiff for this secondary lens, and this circular secondary lens can only realize man-to-man coupling in LED, the coupling of one-to-many can not be realized, along with the increase of backlight module size and the raising of brightness demand, LED quantity increases, the quantity also corresponding increase of so this circular secondary lens, thus be difficult to realize cost reduction.
Summary of the invention
The object of this invention is to provide a kind of cost relatively cheap, both may be used for corner type backlight module, the mirror lens that may be used for again Staight downward type backlight module, the backlight module using this mirror lens and display device.
Mirror lens of the present invention, comprise the mirror body that xsect is the strip of back taper mesa-shaped, the first surface that the area of described mirror body is larger is exiting surface, described first surface is provided with the groove in order to hold light source to the less second surface depression of the area of described mirror body, the first side wall of described groove and the second sidewall are toward each other, first surface is connected by two sides with second surface, described second surface and two sides are reflecting surface, in order to the light that sent by the described light source outer lateral reflection to the first surface of described mirror body.
Mirror lens of the present invention, wherein, described groove is arc groove or cone tank.
Mirror lens of the present invention, wherein, described the first side wall and described second sidewall with the longitudinal axis of the bottom surface of described groove for axle is symmetrical.
Mirror lens of the present invention, wherein, the top surface of described the first side wall and the second sidewall is formed by connecting by multiple first circular arc cylinder outwardly and arranged in parallel, and the separatrix between described first circular arc cylinder is all parallel to the longitudinal axis of the bottom surface of described groove.
Mirror lens of the present invention, wherein, is also provided with joint face between described first circular arc cylinder, and the first circular arc cylinder of adjacent, parallel arrangement connects by described joint face.
Mirror lens of the present invention, wherein, the direction of the longitudinal axis of the bottom surface of the described groove of radius edge sensing of the multiple described first circular arc cylinder on described the first side wall increases progressively.
Mirror lens of the present invention, wherein, described the first side wall is provided with three the first circular arc cylinders, be followed successively by outside the first circular arc cylinder, middle part first circular arc cylinder and inner side first circular arc cylinder, the radius of described middle part first circular arc cylinder is greater than the radius of inner side the first circular arc cylinder, the radius of described inner side first circular arc cylinder is greater than the radius of outside the first circular arc cylinder, and described three the first circular arc cylinders are in same level.
Mirror lens of the present invention, wherein, described second surface and described two sides is provided with the first reflection horizon towards described first surface.
Mirror lens of the present invention, wherein, described second surface and described two sides are provided with diffusion particle, and described diffusion particle is positioned on the inner surface in described first reflection horizon.
The backlight module of use mirror lens of the present invention, comprise diffuser plate and be arranged at the light supply apparatus of side, the back side of described diffuser plate, described light supply apparatus comprises mirror lens of the present invention and is arranged at the light source of inside of described groove, and the groove surface of described mirror lens is to the back side of described diffuser plate.
The backlight module of use mirror lens of the present invention, wherein, described light source is LED lamp bar, and described LED lamp bar comprises printed circuit board (PCB) and is arranged at the LED on described printed circuit board (PCB), and the exiting surface of described LED is towards the bottom land of described groove.
The backlight module of use mirror lens of the present invention, wherein, the surface of the bottom land towards described groove of described printed circuit board (PCB) is provided with the second reflection horizon emitted beam for reflecting described LED.
The backlight module of use mirror lens of the present invention, wherein, the back side of described printed circuit board (PCB) is provided with the adhesive tape for dispelling the heat.
The backlight module of use mirror lens of the present invention, comprise light guide plate and be arranged at the light supply apparatus of side, side of described light guide plate, described light supply apparatus comprises mirror lens of the present invention and is arranged at the light source of inside of described groove, the groove surface of described mirror lens is to described light guide plate, and described light source is between described light guide plate and described mirror lens.
The backlight module of use mirror lens of the present invention, wherein, described light source is LED lamp bar, and described LED lamp bar comprises printed circuit board (PCB) and is arranged at the LED on described printed circuit board (PCB), and the exiting surface of described LED is towards the bottom land of described groove.
The backlight module of use mirror lens of the present invention, wherein, described light supply apparatus is arranged at the outside of at least one corner of described light guide plate.
Display device of the present invention, comprises the backlight module of use mirror lens of the present invention.
Mirror lens moulding process of the present invention is simple, easy to assembly, both can well be used for Staight downward type backlight module, and can well be used for again the backlight module of corner type; Mirror lens cost of the present invention is relatively cheap simultaneously, makes LED down straight aphototropism mode set can substitute CCFL down straight aphototropism mode set widely, also reaches environmental protection object while low cost.
The backlight module of use mirror lens of the present invention, by using mirror lens, not only reaching the effect expanding rising angle, can also mate luminous light source down; Meanwhile, backlight module itself is made to have higher uniformity, better bright dipping quality.
The backlight module of use mirror lens of the present invention, because have employed mirror lens of the present invention, can reduce the quantity of LED in a large number, realize the object of low-power consumption environmental protection, reduce the cost of light source simultaneously.The backlight module of use mirror lens of the present invention, owing to employing the mirror lens with the effect of expansion rising angle of the present invention, so do not need the LED of special long narrow encapsulation, namely can reach the object entering angular expanding light guide plate.
The backlight module of use mirror lens of the present invention, employing be reflected into optical mode, thus efficiently avoid the light guide plate incidence surface occurred in transmission light inlet be heated for a long time and cause melt distortion danger.
The backlight module of use mirror lens of the present invention, owing to employing mirror lens, increases the angle of light guide plate incident light, thus the difficulty that the site reducing light guide plate regulates.
Display device of the present invention, because adopt backlight module of the present invention, can improve the display quality of self greatly.
Accompanying drawing explanation
Fig. 1 is the structural representation of the light supply apparatus in the first embodiment of the backlight module of use mirror lens of the present invention, basically illustrates the structure of the first embodiment of mirror lens of the present invention;
Fig. 2 is the stereographic map of the structural representation of light supply apparatus in the first embodiment of the backlight module of use mirror lens of the present invention, basically illustrates the spatial structure of the first embodiment of mirror lens of the present invention;
Fig. 3 is the structural representation of the first embodiment of the backlight module of use mirror lens of the present invention;
Fig. 4 is the concrete scale diagrams of the light supply apparatus of the first embodiment using mirror lens of the present invention;
Fig. 5 is the rising angle distribution plan of the light supply apparatus of the first embodiment using mirror lens of the present invention;
Fig. 6 is the illumination patterns figure of the light supply apparatus not using mirror lens of the present invention;
Fig. 7 be use the light supply apparatus of the first embodiment of mirror lens of the present invention go out intensity of illumination distribution figure;
Fig. 8 is the intensity map of the first embodiment of the backlight module of the use mirror lens of the present invention not using diffusion sheet and blooming piece;
Fig. 9 is the intensity map of the first embodiment of the backlight module of the use mirror lens of the present invention using diffusion sheet and blooming piece;
Figure 10 is the structural representation of the second embodiment of the backlight module of use mirror lens of the present invention;
Figure 11 is the partial enlarged drawing of the A structure shown in Figure 10;
Figure 12 is the concrete scale diagrams of the light supply apparatus of the second embodiment using mirror lens of the present invention;
Figure 13 is the surface of intensity distribution of the light supply apparatus of the second embodiment using mirror lens of the present invention;
Figure 14 is the Illumination Distribution figure of the light supply apparatus of the second embodiment not using mirror lens of the present invention;
Figure 15 is the Illumination Distribution figure of the light supply apparatus of the second embodiment using mirror lens of the present invention.
Embodiment
Embodiment one
As shown in Figure 1, Figure 2, Figure 3 shows, the embodiment of the backlight module of use mirror lens of the present invention, comprises diffuser plate 1 and is arranged at the light supply apparatus 2 of side, the back side of diffuser plate 1.Light supply apparatus 2 comprises the mirror lens 3 of the embodiment of the present invention and is arranged at the light source 5 of inside of groove 13 of mirror lens 3, and the groove 13 of mirror lens 3 is towards the back side of diffuser plate 1.The bottom of mirror lens 3 is provided with reflecting plate 7.Front (exiting surface) side of diffuser plate 1 is provided with blooming piece 6.
The mirror lens 3 of the embodiment of the present invention, comprises the mirror body 10 of back taper mesa-shaped.The first surface 11 that the area of mirror body 10 is larger is exiting surface, first surface 11 is provided with the groove 13 in order to hold light source 5 caved in the second surface 12 that the area of mirror body 10 is less.Toward each other, second surface 12 and two sides 19 are reflecting surface for the first side wall 21 of groove 13 and the second sidewall 22, in order to the light that sent by the light source 5 outer lateral reflection to the first surface 11 of mirror body 10.
The hollow arrow of Fig. 1 shows mirror lens 3 paths route operationally.When the mirror lens 3 of the embodiment of the present invention works, light source 5 is arranged in groove 13, the light that light source 5 sends is incident upon second surface 12 and two sides 19, under second surface 12 and the reflex of two sides 19 and the diffusion of first surface 11, the first side wall 21 and the second sidewall 22, light reflects away to the outside of first surface 11.
The backlight module of the use mirror lens of embodiments of the invention in use, the light that light source 5 sends is incident upon second surface 12 and two sides 19, under second surface 12 and the reflex of two sides 19 and the diffusion of the first side wall 21 and the second sidewall 22, light reflection is to the back side of diffuser plate 1.
The mirror lens moulding process of embodiments of the invention is simple, easy to assembly, can well be used for Staight downward type backlight module; Mirror lens cost of the present invention is relatively cheap simultaneously, makes LED down straight aphototropism mode set can substitute CCFL down straight aphototropism mode set widely, also reaches environmental protection object while low cost.
The backlight module of the use mirror lens of embodiments of the invention, by using mirror lens, not only reaching the effect expanding rising angle, can also mate luminous light source down; Meanwhile, backlight module itself is made to have higher uniformity, better bright dipping quality.
In mirror lens 3, groove 13 is arc groove.
In other embodiments of the invention, groove 13 can be the groove of cone tank or other shapes.
In mirror lens 3, the first side wall 21 and the second sidewall 22 are that axle is symmetrical with the longitudinal axis 14 of the bottom surface of groove 13.
In mirror lens 3, the first surface 11 of mirror body 10 is formed by connecting by multiple first circular arc cylinder 31 outwardly and arranged in parallel, and the separatrix between the first circular arc cylinder 31 is all parallel to the longitudinal axis 14 of the bottom surface of groove 13.
In mirror lens 3, the direction of the longitudinal axis 14 of the bottom surface of the radius edge sensing groove 13 of the multiple first circular arc cylinders 31 on the first side wall 21 increases progressively.
For avoiding light loss, improving light efficiency, in mirror lens 3, second surface 12 and described two sides 19 are coated with the first reflection horizon 18 towards first surface 11.The reflection horizon of the preferred high reflectance in the first reflection horizon 18, such as Ag reflective coating, its implementation can be attaching, coating or steaming degree.
In mirror lens 3, second surface 12 and described two sides 19 are provided with diffusion particle 17, and diffusion particle is positioned on the inner surface in the first reflection horizon 18, to realize local light fine setting.
The backlight module of the use mirror lens of embodiments of the invention, light source 5 is LED lamp bar, and above-mentioned LED lamp bar comprises printed circuit board (PCB) 51 and is arranged at the LED 52 on printed circuit board (PCB) 51, and the exiting surface of LED 52 is towards the bottom land of groove 13.
The backlight module of the use mirror lens of embodiments of the invention, wherein, the color of the phosphor powder layer 53 of LED 52 is yellow.
The part excitation line that the wafer that the fluorescent powder of phosphor powder layer 53 is used for absorbing LED 52 sends, and inspire the emission of light that wavelength differs from the wavelength of the excitation line that wafer sends according to this.The excitation line that the wafer of LED 52 sends is blue light, and fluorescent powder is yellow fluorescent powder, and the blue light that LED 52 sends and the gold-tinted that yellow fluorescent powder sends complementation form white light.
The light that LED sends is determined jointly by wafer and fluorescent powder, adopts the LED emitted white light under normal circumstances, and the LED emitted white light can be lan chip and yellow fluorescent powder formation, also can be that bluish-green twin lamella and red fluorescent powder are formed.Yellow fluorescent powder is coordinated for blue dies, the principle of white led lamps luminescence is, the energy that wafer discharges under external power effect emits with the form of photons of blue light-emitting, and the photon of these blue light-emittings bombards yellow fluorescent powder further, thus compound goes out white light.Therefore, different wafers different fluorescent powder of arranging in pairs or groups will send the light of different-waveband, according to actual design needs, can select the LED sending out different-waveband light.
Be similarly and avoid light loss, improve light efficiency, the embodiment of the backlight module of use mirror lens of the present invention, wherein, the surface of the bottom land towards groove 13 of printed circuit board (PCB) 51 is provided with the second reflection horizon 54 emitted beam for reflecting LED.
The backlight module of the use mirror lens of embodiments of the invention, wherein, the back side of printed circuit board (PCB) 51 is provided with the adhesive tape 55 for dispelling the heat.
The backlight module of the use mirror lens of embodiments of the invention does not need with secondary optical lens.
The backlight module of the use mirror lens of embodiments of the invention, the LED forming lamp bar can be existing straight-down negative LED used, and also can be LED used in common side entrance back module, the packing forms of LED can have a variety of.Mirror lens of the present invention, wherein, can also be provided with joint face between the first circular arc cylinder 31, and the first circular arc cylinder 31 of adjacent, parallel arrangement connects by above-mentioned joint face.
The direction of the longitudinal axis 14 of the bottom surface of the radius edge sensing groove 13 of the multiple first circular arc cylinders 31 on the first side wall 21 increases progressively.Above-mentioned radius increase progressively just that one is preferred embodiment, when concrete mirror lens is applied, according to the attribute of optical design demand and blooming piece with matching (light guide plate or diffuser plate etc.), can the relation of the multiple first circular arc cylinder radius of specific design.
Mirror lens of the present invention can well be used for the backlight module of corner type.The mirror lens of a kind of embodiment of the present invention in the backlight module of corner type, wherein, above-mentioned the first side wall is provided with three the first circular arc cylinders, be followed successively by outside the first circular arc cylinder, middle part the first circular arc cylinder and inner side first circular arc cylinder, the radius of above-mentioned middle part first circular arc cylinder is greater than the radius of inner side the first circular arc cylinder, the radius of above-mentioned inner side first circular arc cylinder is greater than the radius of outside the first circular arc cylinder, make described three described first circular arc cylinders in same level, now between the first circular arc cylinder also with arrange or joint face is not set.
As shown in Figure 4, use the light supply apparatus 2 of the first embodiment of mirror lens 3 of the present invention, wherein, the length a of first surface 11 is 53.593 millimeters, and the length b of second surface 12 is 18.231 millimeters, and high c is 11 millimeters, light source 5 is 2.626 millimeters apart from the distance d of the bottom land of groove 13, the radius R 1 of the outside first circular arc cylinder 31 of the first side wall 21 is 1.52 millimeters, and the radius R 2 of middle part first circular arc cylinder 31 is 2.146 millimeters, and the radius R 3 of inner side first circular arc cylinder 31 is 3.421 millimeters.
The LED of 4014 traditional models, the rising angle scope along its exiting surface parallel direction is 120 °.
Angle value corresponding when rising angle refers to that light intensity reduces to largest light intensity 50%, as shown in Figure 5, in figure, the coboundary of annulus is close to 6cd (candela), namely representative coordinates the largest light intensity of the LED 52 ' of mirror lens 3 ' close to 6cd, when light intensity reduces to largest light intensity 50%, angle value corresponding to territory, annular footprint is at-76 ° within the scope of 76 °, and namely rising angle scope is 152 °.
Do not use the illumination patterns of the light supply apparatus of mirror lens of the present invention as shown in Figure 6, the horizontal ordinate of this figure represents along the parallel direction of exiting surface, and unit is mm (millimeter).The illumination patterns of the light supply apparatus of mirror lens of the present invention is not used to present the trend that zone line is extremely strong and acutely decay in both sides.Because this strong and weak uneven illuminance easily causes bright dark uneven phenomenon in backlight, finally speck phenomenon will be shown as over the display.
And after matching the mirror lens of the present embodiment, as shown in Figure 7, the horizontal ordinate of this figure represents along the parallel direction of exiting surface its corresponding illumination pattern, unit is mm (millimeter).After matching the mirror lens of the present embodiment, bright dipping regional expansion, can be extended to about 60mm scope from being about 1.4mm scope, the region after expansion is more uniform and stable in the central region of 20mm, and more toward both sides, its brightness value is corresponding to decline to some extent.In the reflective Staight downward type backlight module design of reality, further even light can be realized by adding diffusion particle bottom diffuser plate or mirror lens, meeting the requirements of uniformity.
Do not use the Luminance Distribution of the first embodiment of the backlight module of the use mirror lens of the present invention of diffusion sheet and blooming piece as shown in Figure 8; Use the Luminance Distribution of the first embodiment of the backlight module of the use mirror lens of the present invention of diffusion sheet and blooming piece as shown in Figure 9; The horizontal ordinate of Fig. 8, Fig. 9 all represents along the parallel direction of exiting surface, and unit is mm (millimeter).Do not add brightness distribution curve still some minor swing of the backlight module of the use mirror lens of diffusion and the optics that adds lustre to (such as, diffuser plate, prismatic lens, diffusion sheet etc.).But in interpolation after diffusion sheet and blooming piece, form reflective full run-down type LED-backlit module, its brightness is basically stable at 5000cd/m
2(candela every square metre) left and right, meets the requirement of backlight module uniformity.
The backlight module of the use mirror lens of embodiments of the invention, the mirror lens of the application of the invention, not only reaches the effect expanding rising angle, can also mate luminous LED lamp bar down; Meanwhile, owing to have employed mirror lens of the present invention, make that itself there is higher uniformity, better bright dipping quality.
Embodiment two
Shown in Figure 10, Figure 11, mirror lens of the present invention also goes for the backlight module of corner type.The backlight module that the backlight module of the use mirror lens of the present embodiment is corner type.The backlight module of the use mirror lens of the present embodiment comprises light guide plate 1 ' and is arranged at the light supply apparatus 2 ' of at least one side of light guide plate 1 '.Light supply apparatus 2 ' comprises the mirror lens 3 ' of the embodiment of the present invention and is arranged at the light source 5 ' of inside of groove 13 ' of mirror lens 3 '.
The mirror lens 3 ' of the present embodiment is identical with mirror lens 3 structure of embodiment one, and it is short that difference is that the longitudinal length of the mirror lens 3 ' of the present embodiment compares the longitudinal length of the mirror lens 3 of embodiment one.
The groove 13 ' of mirror lens 3 ' is towards light guide plate 1 ', and light source 5 ' is positioned between light guide plate 1 ' and mirror lens 3 '.
The backlight module of the use mirror lens of the present embodiment operationally, the light that light source 5 ' sends is incident upon second surface 12 ' and two sides 19 ', under second surface 12 ' and the reflex of two sides 19 ' and the diffusion of first surface 11 ', the first side wall 21 ' and the second sidewall 22 ', light reflection is to the side of light guide plate 1 '.
The embodiment of the backlight module of use mirror lens of the present invention, wherein, the structure of the light source 5 ' of the present embodiment is identical with light source 5 structure of embodiment one, and it is short that difference is that the longitudinal length of the light source 5 ' of the present embodiment compares the longitudinal length of the light source 5 of embodiment one.
The light source 5 ' of the present embodiment is LED lamp bar, and LED lamp bar comprises printed circuit board (PCB) 51 ' and is arranged at the LED 52 ' on printed circuit board (PCB) 51 ', and the exiting surface of LED 52 ' is towards the bottom land of groove 13 '.
The embodiment of the backlight module of use mirror lens of the present invention, wherein, light supply apparatus 2 ' is arranged at the outside of four corners of light guide plate 1 '.
In other embodiments of the backlight module of use mirror lens of the present invention, light supply apparatus 2 ' can be arranged at the outside of the outside of a corner of light guide plate 1 ' or the outside of two corners or three corners, and light supply apparatus 2 ' is arranged at the outside of at least one corner of light guide plate 1 ' in a word.
In other embodiments of the backlight module of use mirror lens of the present invention, light supply apparatus 2 ' also can be arranged at a limit of light guide plate 1 ' outside or be arranged at respectively light guide plate 1 ' two opposite side outside or be arranged at the outside on three limits of light guide plate 1 ' respectively, light supply apparatus 2 ' can be arranged at the outside at least of light guide plate 1 ' in a word.
The structure of light guide plate is not limited in the embodiment of the present invention; in the plane of its edge, groove, projection or diffusion particle etc. can be set; the structure of light guide plate itself also can be the structure of the functions such as collection reflection, diffusion; all do not limit at this, as long as the back light module unit structure comprising this kind of mirror lens is all within protection scope of the present invention.
As shown in figure 12, use the light supply apparatus 2 ' of the second embodiment of mirror lens 3 ' of the present invention, wherein, the length a ' of first surface 11 ' is 20 millimeters, the length b ' of second surface 12 ' is 10 millimeters, high c ' is 3 millimeters, light source 5 ' is 0.2 millimeter apart from the distance d ' of the bottom land of groove 13 ', the radius R 3 ' of the outside first circular arc cylinder 31 ' of the first side wall 21 ' is 1.246 millimeters, the radius R 2 ' of middle part the first circular arc cylinder 31 ' is 1.92 millimeters, and the radius R 1 ' of inner side first circular arc cylinder 31 ' is 1.625 millimeters.The model of the LED in light source 5 ' is 3810.The thickness of mirror lens 3 ' is 0.6 millimeter (for matching with 3810LED thickness).
3810LED is side light emitting species, is widely used in panel computer product, and its lighting angle is about 120 ° in the direction parallel along exiting surface.
Use the light distribution of the light supply apparatus 2 ' of the second embodiment of mirror lens of the present invention as shown in figure 13, by centered by light intensity 50% corresponding to angle define lighting angle, after LED adds mirror lens 3 ', in the positive axis of X-axis (along the direction that exiting surface is parallel), the most about 1.5cd of light intensity (candela), light intensity by centered by light intensity 50% corresponding to angle be 78 °, add the negative semiaxis of X-axis, rising angle is at-78 ° within the scope of 78 °, and rising angle is 156 °.This angle is known compared with 120 °, and mirror lens makes reflecting light angle expand 36 °.
Do not use the Illumination Distribution of the light supply apparatus of the second embodiment of mirror lens of the present invention as shown in figure 14, the horizontal ordinate of this figure represents along the parallel direction of exiting surface, and unit is mm (millimeter).If adopt the direct incident light guide plate of LED3810, namely transmission-type is incident, and the Illumination Distribution of its correspondence concentrates within the scope of 2.5mm substantially.
Use the Illumination Distribution of the light supply apparatus of the second embodiment of mirror lens of the present invention as shown in figure 15, the horizontal ordinate of this figure represents along the parallel direction of exiting surface, and unit is mm (millimeter).Form reflection-type incidence by adding mirror lens 3 ', although there is the low-light (level) zonule (about 2.5mm) of center section, its Illumination Distribution is extended to about 18mm scope.Center section low-light (level) region utilizing emitted light is subject to blocking of LED itself and is formed, distance between suitable increase LED and the incidence surface of mirror lens, or suitably reduce the package dimension of LED, or the distance suitably increased in backlight module between mirror lens and the incidence surface of light guide plate, this corresponding low-light (level) part will effectively reduce, and even eliminate.
The backlight module of the use mirror lens of embodiments of the invention, because have employed mirror lens of the present invention, can reduce the quantity of LED in a large number, realize the object of low-power consumption environmental protection, reduce the cost of light source simultaneously.
The backlight module of the use mirror lens of embodiments of the invention, owing to employing the mirror lens with the effect of expansion rising angle of the present invention, so do not need the LED of special long narrow encapsulation, namely can reach the object entering angular expanding light guide plate.
The backlight module of the use mirror lens of embodiments of the invention, employing be reflected into optical mode, thus efficiently avoid the light guide plate incidence surface occurred in transmission light inlet be heated for a long time and cause melt distortion danger.
The backlight module of the use mirror lens of embodiments of the invention, owing to employing mirror lens, increases the angle of light guide plate incident light, thus the difficulty that the site reducing light guide plate regulates.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (17)
1. a mirror lens, it is characterized in that, comprise the mirror body that xsect is the strip of back taper mesa-shaped, the first surface that the area of described mirror body is larger is exiting surface, described first surface is provided with the groove in order to hold light source to the less second surface depression of the area of described mirror body, the first side wall of described groove and the second sidewall are toward each other, first surface is connected by two sides with second surface, described second surface and two sides are reflecting surface, in order to the light that sent by the described light source outer lateral reflection to the first surface of described mirror body.
2. mirror lens according to claim 1, is characterized in that, described groove is arc groove or cone tank.
3. mirror lens according to claim 2, is characterized in that, described the first side wall and described second sidewall with the longitudinal axis of the bottom surface of described groove for axle is symmetrical.
4. mirror lens according to claim 3, it is characterized in that, the top surface of described the first side wall and the second sidewall is formed by connecting by multiple first circular arc cylinder outwardly and arranged in parallel, and the separatrix between described first circular arc cylinder is all parallel to the longitudinal axis of the bottom surface of described groove.
5. mirror lens according to claim 4, is characterized in that, is also provided with joint face between described first circular arc cylinder, and the first circular arc cylinder of adjacent, parallel arrangement connects by described joint face.
6. the mirror lens according to claim 4 or 5, is characterized in that, the direction of the longitudinal axis of the bottom surface of the described groove of radius edge sensing of the multiple described first circular arc cylinder on described the first side wall increases progressively.
7. mirror lens according to claim 4, it is characterized in that, described the first side wall is provided with three the first circular arc cylinders, be followed successively by outside the first circular arc cylinder, middle part first circular arc cylinder and inner side first circular arc cylinder, the radius of described middle part first circular arc cylinder is greater than the radius of inner side the first circular arc cylinder, the radius of described inner side first circular arc cylinder is greater than the radius of outside the first circular arc cylinder, and described three the first circular arc cylinders are in same level.
8. the mirror lens according to claim 4 or 5, is characterized in that, described second surface and described two sides is provided with the first reflection horizon towards described first surface.
9. mirror lens according to claim 8, is characterized in that, described second surface and described two sides are provided with diffusion particle, and described diffusion particle is positioned on the inner surface in described first reflection horizon.
10. one kind uses the backlight module of mirror lens, comprise diffuser plate and be arranged at the light supply apparatus of side, the back side of described diffuser plate, it is characterized in that, described light supply apparatus comprises the mirror lens as described in any one of claim 1-9 and the light source of the inside of groove as described in being arranged at, and the groove surface of described mirror lens is to the back side of described diffuser plate.
The backlight module of 11. use mirror lens according to claim 10, it is characterized in that, described light source is LED lamp bar, and described LED lamp bar comprises printed circuit board (PCB) and is arranged at the LED on described printed circuit board (PCB), and the exiting surface of described LED is towards the bottom land of described groove.
The backlight module of 12. use mirror lens according to claim 11, is characterized in that, the surface of the bottom land towards described groove of described printed circuit board (PCB) is provided with the second reflection horizon emitted beam for reflecting described LED.
The backlight module of 13. use mirror lens according to claim 12, is characterized in that, the back side of described printed circuit board (PCB) is provided with the adhesive tape for dispelling the heat.
14. 1 kinds of backlight modules using mirror lens, comprise light guide plate and be arranged at the light supply apparatus of side, side of described light guide plate, it is characterized in that, described light supply apparatus comprises the mirror lens as described in any one of claim 1-9 and the light source of the inside of groove as described in being arranged at, the groove surface of described mirror lens is to described light guide plate, and described light source is between described light guide plate and described mirror lens.
The backlight module of 15. use mirror lens according to claim 14, it is characterized in that, described light source is LED lamp bar, and described LED lamp bar comprises printed circuit board (PCB) and is arranged at the LED on described printed circuit board (PCB), and the exiting surface of described LED is towards the bottom land of described groove.
The backlight module of 16. use mirror lens according to claim 15, is characterized in that, described light supply apparatus is arranged at the outside of at least one corner of described light guide plate.
17. 1 kinds of display device, is characterized in that, comprise the backlight module as described in any one of claim 10-16.
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| CN201210545847.9A CN103017085B (en) | 2012-12-14 | 2012-12-14 | Mirror lens, the backlight module using this mirror lens and display device |
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| CN201210545847.9A CN103017085B (en) | 2012-12-14 | 2012-12-14 | Mirror lens, the backlight module using this mirror lens and display device |
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| CN103017085A CN103017085A (en) | 2013-04-03 |
| CN103017085B true CN103017085B (en) | 2015-08-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104424858A (en) * | 2013-08-26 | 2015-03-18 | 深圳市康硕展电子有限公司 | Backlight LED display screen |
| CN104503006B (en) * | 2014-12-01 | 2016-03-09 | 杭州照相机械研究所 | Lens and there is the light adjusting system of these lens |
| CN104949005B (en) * | 2015-06-17 | 2017-07-14 | 东莞勤上光电股份有限公司 | A kind of stack collimates the ray structure of LED |
| CN105929602B (en) * | 2016-07-12 | 2019-08-27 | 京东方科技集团股份有限公司 | A kind of backlight module and preparation method thereof, display panel and display device |
| CN108761919B (en) * | 2018-07-13 | 2023-10-31 | 安徽芯瑞达科技股份有限公司 | High-efficiency backlight module |
| CN110609418A (en) * | 2019-09-24 | 2019-12-24 | 深圳创维－Rgb电子有限公司 | Backlight module and display device |
| CN112631026B (en) * | 2020-12-31 | 2024-05-10 | 联晶智能电子有限公司 | Backlight lens and module |
| CN113820764B (en) * | 2021-08-27 | 2023-03-21 | 广东烨嘉光电科技股份有限公司 | Preparation method of direct type backlight lens |
| CN114755752B (en) * | 2022-04-14 | 2023-11-28 | 武汉华星光电技术有限公司 | Backlight module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6886962B2 (en) * | 2001-06-27 | 2005-05-03 | Toyoda Gosei Co., Ltd. | Shielded reflective light-emitting diode |
| CN100350313C (en) * | 2005-02-08 | 2007-11-21 | 友达光电股份有限公司 | Back light assembly of liquid crystal device |
| US8646960B2 (en) * | 2010-08-03 | 2014-02-11 | 3M Innovative Properties Company | Scanning backlight with slatless light guide |
| CN102588879A (en) * | 2012-01-17 | 2012-07-18 | 宁波爱珂照明科技有限公司 | Reflection lens for LED lamp |
| CN202419267U (en) * | 2012-01-17 | 2012-09-05 | 宁波爱珂照明科技有限公司 | LED (light emitting diode) candle lamp |
| CN102679252B (en) * | 2012-04-19 | 2014-09-17 | 重庆大学 | Dipped headlight optical system for high-power LED automobile head light |
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