CN203249080U - Direct lighting type backlight module - Google Patents
Direct lighting type backlight module Download PDFInfo
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- CN203249080U CN203249080U CN 201320123832 CN201320123832U CN203249080U CN 203249080 U CN203249080 U CN 203249080U CN 201320123832 CN201320123832 CN 201320123832 CN 201320123832 U CN201320123832 U CN 201320123832U CN 203249080 U CN203249080 U CN 203249080U
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- light source
- optical lens
- led light
- secondary optical
- groove
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Abstract
The utility model relates to a backlight technology of a liquid crystal display and particularly discloses a direct lighting type backlight module. The backlight module comprises a light-emitting diode (LED) light source, a printed circuit board (PCB), a secondary optical lens and a diffusion plate. Light emitted by the LED light source passes through the groove face of a first groove, is diffused to a range defined by 45-85 degrees of bilateral deviation from a vertical curve and then passes through a secondary optical lens body to reach the groove face of a second groove, a part of light is refracted to the diffusion plate, and the other part of light is fully reflected out of the side face of the secondary optical lens body. The selectivity of the direct lighting type backlight source can be wide, meanwhile thinning of an LED liquid crystal display panel is achieved, and the cost is further reduced. The direct lighting type assembly can be further simplified, enough mechanical strength of the secondary optical lens is ensured, and good protecting effect is obtained.
Description
Technical field
The utility model relates to a kind of backlight technology of LCDs, especially a kind of backlight module of straight-down negative.
Background technology
At present, LED shows that at liquid crystal panel the application permeability in field surpasses 90% as backlight.The backlight source module framework mainly contains two kinds of side entering type and straight-down negatives, side entering-type LED backlight is the side that led light source is arranged on LGP, the light that LED sends is by being coupled into LGP, reflection by reflector plate, site and scattering are with light-output, the shortcoming of doing like this is that formed picture contrast is relatively relatively poor, can not carry out local dimming.Direct-light type LED backlight then can present image more accurately, and shows outstanding color and comparison of light and shade effect and become gradually the main flow trend in market.
The direct-light type LED backlight module generally comprises LCD display, diffuser plate and pcb board, pcb board is provided with the led light source after some encapsulation, after led light source emits beam, behind diffuser plate light become evenly, consistent, then shine on the LCD display equably, thus the effect that realization is thrown light on to liquid crystal indicator.
Present, because the distribution density of led light source on PCB of direct-light type LED backlight module is large, the light between the led light source easily intersects mixed light.In order to overcome the problems referred to above, general way is to increase diffuser plate to the distance of led light source at present, and then comes disperse light by diffuser plate.This has just directly caused the thickness of LED module to increase, and is unfavorable for the trend of present ultrathin.
If the distribution density of led light source on PCB reduced, it namely is the distance that enlarges between the adjacent LED light source, easily intersect the problem of mixed light to overcome light between the led light source, will bring the inhomogeneous problem of distribution of light, this also is why generally to adopt at present to increase the reason that diffuser plate solves mixed light.
The utility model content
For the deficiencies in the prior art, the purpose of this utility model is to design a kind of thinner backlight module of backlight that can allow straight-down negative.
In order to realize above-mentioned utility model purpose, technical solution adopted in the utility model is as follows:
A kind of down straight aphototropism mode set, this backlight module comprises led light source, pcb board, secondary optical lens and diffuser plate; Described led light source is fixedly connected on the described pcb board; Described secondary optical lens spiral-lock is above described led light source, this secondary optical lens comprises the secondary lens body, the one side adjacent with described led light source at described secondary lens body is provided with the first groove, and the one side adjacent with diffuser plate at described secondary lens body is provided with the second groove; Described diffuser plate is arranged on the top of described secondary optical lens; The light that described led light source sends is through being flooded to the scope of 45-85 ° of left and right deviation vertical curve behind the groove surface of described the first groove, then pass the groove surface that described secondary lens body arrives described the second groove, part light arrives diffuser plate through refraction, and another part light generation total reflection is penetrated from secondary lens body side.
For so that secondary optical lens is more firm with the mechanical connection of pcb board, described secondary optical lens spiral-lock is above described led light source, specifically: the lower surface at described secondary lens body is provided with locating dowel, be provided with the locating hole corresponding with described locating dowel at described pcb board upper surface, the locating dowel of secondary optical lens be inserted in the locating hole of pcb board and with adhesive and firmly connect to realize that the secondary optical lens spiral-lock is above described led light source.
Further, for so that secondary optical lens is further firm with the mechanical connection of pcb board, the quantity of described locating dowel is separately positioned on the edge of the lower surface of described secondary lens body greater than 2.
Further, the lighting angle of described led light source is 90 °-160 °.
Further, the light-emitting zone of described led light source be take the central point of this led light source as center of circle diameter the border circular areas of 2-3 millimeter or take the central point of this led light source as geometric center and four rectangular edges to the distance of this geometric center all in the rectangular area of 2-3 millimeter.
Further, the degree of depth of described the second groove is less than or equal to 70% of described secondary lens body thickness.
Further, the upper surface at described pcb board is coated with the light that a reflector layer is returned with the groove surface total reflection of described the second groove of reflection quilt.
Further, the reflectivity of described reflector layer is not less than 95%.
Further, the material of described secondary lens body is by a kind of the making in Merlon, polymethyl methacrylate, PET, silica gel, epoxy resin, polypropylene cyanogen-butadiene-styrene or the glass material.
Further, the package dimension size of described led light source is in 1.0mm * 1.0mm to 6.0mm * 6.0mm scope.
Further, be coated with a reflectance ink layer in the described diffuser plate one side adjacent with secondary optical lens.
Further, be provided with one in the described diffuser plate one side adjacent with secondary optical lens and thicken projection, described thicken projection be arranged on described secondary optical lens directly over.
With respect to prior art, the beneficial effects of the utility model are:
1, the light that sends of led light source is broken up light through two grooves of secondary optical lens, thereby so that it is more even to get to the diffuser plate glazed thread, so that the light that led light source sends is through behind the secondary optical lens, can allow the spacing of led light source and diffuser plate less, thereby realize slimming.
2, the first groove of the utility model secondary optical lens light that led light source can be sent diffuses to the scope of 45-85 ° of left and right deviation vertical curve, and then so that the utility model is wide to the selective scope of led light source, avoided the matching requirement of secondary optical lens to led light source.
3, the utility model scioptics band locating dowel and PCB offer the mode of locating hole, so that secondary optical lens is more firm with the mechanical connection of PCB plate.
4, the utility model is compared side entering type and traditional down straight aphototropism mode set, and the utility model can overcome under the inhomogeneous prerequisite of distribution of light, increases the distance between the adjacent LED light source, and then reduces the usage quantity of led light source, further reduces cost.
5, the utility model adopts lens straps locating dowel and PCB to offer the bonding mode of locating hole, so that the utility model assembling is more prone to, production efficiency is higher.
In order to understand fully the purpose of this utility model, feature and effect, be described further below with reference to the technique effect of accompanying drawing to design of the present utility model, concrete structure and generation.
Description of drawings
Fig. 1 is the blast structural representation of a kind of down straight aphototropism mode set of the utility model.
Fig. 2 is the structural representation of the secondary optical lens of a kind of down straight aphototropism mode set of the utility model.
Fig. 3 is the opticpath schematic diagram of a kind of down straight aphototropism mode set of the utility model, and dotted line and arrow represent light among the figure.
Fig. 4 is the diffusion angle schematic diagram that the utility model light passes the first groove.
Fig. 5 is the schematic diagram of the secondary light ray lens of the utility model embodiment 2.
Fig. 6 is the schematic diagram of the secondary light ray lens of the utility model embodiment 3.
Fig. 7 is the structural representation of the utility model embodiment 4.
Fig. 8 is the another kind of structural representation of the utility model embodiment 4.
Among the figure:
1-pcb board; 2-led light source; 3-secondary optical lens; 4-diffuser plate; 5, reflectance ink layer; 6, thicken projection; The 31-the first groove; 32-secondary lens body; The 33-the second groove; 34-locating dowel;
The specific embodiment
As illustrated in fig. 1 and 2, the present embodiment discloses a kind of down straight aphototropism mode set, this backlight module comprises led light source 2, pcb board 1, secondary optical lens 3, and diffuser plate 4, described led light source 2 is fixedly connected on the described pcb board 1, described secondary optical lens 3 spiral-locks are above described led light source 2, this secondary optical lens 3 comprises secondary lens body 32, be provided with the first groove 31 in described secondary lens body 32 and described led light source 2 adjacent one sides, be provided with the second groove 33 in described secondary lens body 32 and diffuser plate 4 adjacent one sides, described diffuser plate 4 is arranged on the top of described secondary optical lens 3.As shown in Figure 3, the light that described led light source 2 sends is through being flooded to the scope (as shown in Figure 4) of 45-85 ° of left and right deviation vertical curve behind the groove surface of described the first groove 31, then pass the groove surface that described secondary lens body 32 arrives described the second groove 33, part light arrives diffuser plate 4 through refraction, and another part light generation total reflection is penetrated from secondary lens body 32 sides.The present embodiment is owing to having increased the secondary light ray lens of given shape, utilization is two grooves that the surface arranges about its body, the light that LED is sent carries out best breaing up, make it to get to the diffuser plate glazed thread more even, so that the light that led light source sends is through behind the secondary optical lens, can allow the spacing of led light source and diffuser plate less, thereby realize slimming.
Wherein, described secondary optical lens 3 spiral-locks are above described led light source 2, specifically: the lower surface at described secondary lens body 32 is provided with locating dowel 34, be provided with the locating hole (not shown) corresponding with described locating dowel 34 at described pcb board 1 upper surface, the locating dowel 34 of secondary optical lens be inserted in the locating hole of pcb board and with adhesive and firmly connect to realize that secondary optical lens 3 spiral-locks are above described led light source 2.The present embodiment scioptics band locating dowel and PCB offer the mode of locating hole, so that secondary optical lens is more firm with the mechanical connection of pcb board.Simultaneously, adopt lens straps locating dowel and PCB to offer the bonding mode of locating hole, so that the utility model assembling is more prone to, production efficiency is higher.
Wherein, for so that secondary optical lens is further firm with the mechanical connection of pcb board, the quantity of described locating dowel 34 is greater than 2, be separately positioned on the edge of the lower surface of described secondary lens body 32, be rectangle such as the secondary lens body, four be can arrange so, four corners of rectangle or the edge of four edges are separately positioned on.
Wherein, the lighting angle of described led light source 1 is 90 °-160 °, the light-emitting zone of described led light source be take the central point of this led light source as center of circle diameter the border circular areas of 2-3 millimeter or take the central point of this led light source as geometric center and four rectangular edges to the distance of this geometric center all in the rectangular area of 2-3 millimeter.This type LED light sources is commonplace, and range of choice is more extensive.
Wherein, the degree of depth of described the one or two groove 33 is less than or equal to 70% of described secondary lens body 32 thickness, the degree of depth of described the first groove 31 of the present embodiment refers to the second groove 33 minimum points to the distance of upper surface open, and described secondary lens body 32 thickness are its up and down distances between two surfaces.Why the present embodiment selects 70%, is because if greater than 70%, and then the degree of depth of the first groove is corresponding just inevitable less than 30%, thereby affects the radian of the first groove, affects it to the diffusion of light.
Wherein, the present embodiment is coated with the light that a reflector layer (not shown) is returned with the groove surface total reflection of described the second groove 33 of reflection quilt at the upper surface of described pcb board 1.The light that penetrates from the secondary optical lens side is beaten on pcb board 1, pcb board 1 surface applies a reflector layer, form rectangular light spot through after the reflection light being beaten at diffuser plate 4, the distance of adjusting diffuser plate 4 and secondary light ray lens 3 forms uniform rectangular-shaped area source.
Wherein, the reflectivity of described reflector layer is not less than 95%, and the material of this reflector layer is comprised of the silica gel of inserting light-reflecting particles or epoxide resin material.The present embodiment is selected the reflector layer of reflectivity more than 95%, further increases its reflecting effect, improves light efficiency.
Wherein, the material of described secondary lens body is made by in Merlon, polymethyl methacrylate, PET, silica gel, epoxy resin, polypropylene cyanogen-butadiene-styrene or the glass material one or more.
Wherein, the package dimension size of described led light source is in 1.0mm * 1.0mm to 6.0mm * 6.0mm scope.
Therefore, after improving by the present embodiment, thus to get to the diffuser plate glazed thread more even, so that the light that led light source sends can allow the spacing of led light source and diffuser plate less through behind the secondary optical lens, thus the realization slimming.
As shown in Figure 5, the different shapes that are secondary optical lens of this example and embodiment 1, other parts of this enforcement and structure and embodiment 1 are identical.
As shown in Figure 6, the different shapes that also only are secondary optical lens of this example and embodiment 1, other parts of this enforcement and structure and embodiment 1 are identical.
The present embodiment is the further preferred version of embodiment 1-3, for further improve secondary light ray lens 3 light out beat on the diffuser plate 4 and between lens light out have more uniformity, this example has provided two kinds of concrete schemes:
As shown in Figure 7, to provide the first scheme be to apply a reflectance ink layer 5 in diffuser plate 4 and secondary optical lens 3 adjacent one sides to this example.This scheme is reflective, makes one deck reflectance ink at diffuser plate, and institute's produce an effect depends on the ratio of the area of printing ink area/diffuser plate, and this value is larger, and effect is better; Reflectance ink have 75%-80% and 88% two type reflectivity.
As shown in Figure 8, the another kind of scheme that the present embodiment provides is to be provided with one in diffuser plate 4 and secondary optical lens 3 adjacent one sides to thicken projection 6, described thicken projection 6 be arranged on described secondary optical lens 3 directly over.This scheme is penetration, does some projections on diffuser plate, and extrude depth is not less than 1/2 of diffuser plate thickness.
The lower surface of the present embodiment on diffuser plate arranges the pattern (reflectance ink layer or thicken projection) of specialization, the pattern of specialization can be penetration pattern reflective and shown in Figure 8 shown in Figure 7, the emission-type pattern is coated with the last layer reflectance ink for lens corresponding region on diffuser plate, light is beaten on emission layer, be reflected on the meeting pcb board, thereby allow lens top light die down.Then light penetration dies down the penetration pattern for thickening diffuser plate directly over the lens is beaten above it, and then reaches the present embodiment raising light uniformity purpose.
The utility model can also have various embodiments, as can be with the light source of the different packing forms of being arranged in pairs or groups by secondary optical lens, and the combination diffuser plate of coupling more, these all are the protection domains that is equal to of the present utility model.
To sum up, the utility model can allow the backlight of straight-down negative selectively have more popularity, realizes simultaneously the slimming of LED liquid crystal panel, further reduces simultaneously cost.The utility model can also allow straight-down negative assembling oversimplify, and guarantees the enough mechanical strengths of secondary optical lens and obtains good protective effect.
More than describe preferred embodiment of the present utility model in detail, should be appreciated that those of ordinary skill in the art need not creative work and just can make many modifications and variations according to design of the present utility model.Therefore, all in the art technical staff according to the utility model design on the prior art basis by logic analysis, reasoning or according to the available technical scheme of limited experiment, all should be among the determined protection domain by these claims.
Claims (12)
1. down straight aphototropism mode set is characterized in that:
This backlight module comprises led light source, pcb board, secondary optical lens and diffuser plate;
Described led light source is fixedly connected on the described pcb board;
Described secondary optical lens spiral-lock is above described led light source, this secondary optical lens comprises the secondary lens body, the one side adjacent with described led light source at described secondary lens body is provided with the first groove, and the one side adjacent with diffuser plate at described secondary lens body is provided with the second groove;
Described diffuser plate is arranged on the top of described secondary optical lens;
The light that described led light source sends is through being flooded to the scope of 45-85 ° of left and right deviation vertical curve behind the groove surface of described the first groove, then pass the groove surface that described secondary lens body arrives described the second groove, part light arrives diffuser plate through refraction, and another part light generation total reflection is penetrated from secondary lens body side.
2. down straight aphototropism mode set according to claim 1 is characterized in that:
Described secondary optical lens spiral-lock is above described led light source, specifically: the lower surface at described secondary lens body is provided with locating dowel, be provided with the locating hole corresponding with described locating dowel at described pcb board upper surface, the locating dowel of secondary optical lens be inserted in the locating hole of pcb board and with adhesive and firmly connect to realize that the secondary optical lens spiral-lock is above described led light source.
3. down straight aphototropism mode set according to claim 2 is characterized in that:
The quantity of described locating dowel is separately positioned on the edge of the lower surface of described secondary lens body greater than 2.
4. down straight aphototropism mode set according to claim 1 is characterized in that:
The lighting angle of described led light source is 90 °-160 °.
5. down straight aphototropism mode set according to claim 1 is characterized in that:
The light-emitting zone of described led light source be take the central point of this led light source as center of circle diameter the border circular areas of 2-3 millimeter or take the central point of this led light source as geometric center and four rectangular edges to the distance of this geometric center all in the rectangular area of 2-3 millimeter.
6. down straight aphototropism mode set according to claim 1 is characterized in that:
The degree of depth of described the second groove is less than or equal to 70% of described secondary lens body thickness.
7. down straight aphototropism mode set according to claim 1 is characterized in that:
Upper surface at described pcb board is coated with the light that a reflector layer is returned with the groove surface total reflection of described the second groove of reflection quilt.
8. down straight aphototropism mode set according to claim 7 is characterized in that:
The reflectivity of described reflector layer is not less than 95%.
9. each described down straight aphototropism mode set according to claim 1-8 is characterized in that:
The material of described secondary lens body is by a kind of the making in Merlon, polymethyl methacrylate, PET, silica gel, epoxy resin, polypropylene cyanogen-butadiene-styrene or the glass material.
10. each described down straight aphototropism mode set according to claim 1-8 is characterized in that:
The package dimension size of described led light source is in 1.0mm * 1.0mm to 6.0mm * 6.0mm scope.
11. each described down straight aphototropism mode set according to claim 1-8 is characterized in that:
Be coated with a reflectance ink layer in the described diffuser plate one side adjacent with secondary optical lens.
12. each described down straight aphototropism mode set according to claim 1-8 is characterized in that:
Be provided with one in the described diffuser plate one side adjacent with secondary optical lens and thicken projection, described thicken projection be arranged on described secondary optical lens directly over.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320123832 CN203249080U (en) | 2013-03-18 | 2013-03-18 | Direct lighting type backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320123832 CN203249080U (en) | 2013-03-18 | 2013-03-18 | Direct lighting type backlight module |
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| Publication Number | Publication Date |
|---|---|
| CN203249080U true CN203249080U (en) | 2013-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320123832 Expired - Lifetime CN203249080U (en) | 2013-03-18 | 2013-03-18 | Direct lighting type backlight module |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162192A (en) * | 2013-03-18 | 2013-06-19 | 晶科电子（广州）有限公司 | Direct down type backlight module |
| CN105221982A (en) * | 2014-06-09 | 2016-01-06 | 三星电子株式会社 | Light source module, lighting device and illuminator |
| CN107957603A (en) * | 2017-12-22 | 2018-04-24 | 宁波正特光学电器有限公司 | A kind of mirror lens and its ultrathin backlight module |
| CN107966856A (en) * | 2017-12-01 | 2018-04-27 | 青岛海信电器股份有限公司 | A kind of down straight aphototropism mode set and its liquid crystal display device |
| CN114913783A (en) * | 2022-05-27 | 2022-08-16 | 福州大学 | Method for reducing number of micron-sized LED backlight source chips |
| WO2023151599A1 (en) * | 2022-02-09 | 2023-08-17 | 深圳创维－Rgb电子有限公司 | Optical assembly, backlight module and display device |
-
2013
- 2013-03-18 CN CN 201320123832 patent/CN203249080U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162192A (en) * | 2013-03-18 | 2013-06-19 | 晶科电子（广州）有限公司 | Direct down type backlight module |
| CN103162192B (en) * | 2013-03-18 | 2016-03-02 | 晶科电子（广州）有限公司 | A kind of down straight aphototropism mode set |
| CN105221982A (en) * | 2014-06-09 | 2016-01-06 | 三星电子株式会社 | Light source module, lighting device and illuminator |
| CN107966856A (en) * | 2017-12-01 | 2018-04-27 | 青岛海信电器股份有限公司 | A kind of down straight aphototropism mode set and its liquid crystal display device |
| CN107957603A (en) * | 2017-12-22 | 2018-04-24 | 宁波正特光学电器有限公司 | A kind of mirror lens and its ultrathin backlight module |
| WO2023151599A1 (en) * | 2022-02-09 | 2023-08-17 | 深圳创维－Rgb电子有限公司 | Optical assembly, backlight module and display device |
| CN114913783A (en) * | 2022-05-27 | 2022-08-16 | 福州大学 | Method for reducing number of micron-sized LED backlight source chips |
| CN114913783B (en) * | 2022-05-27 | 2023-02-21 | 福州大学 | Method for reducing number of micron-sized LED backlight source chips |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 511458 Nansha District, Guangzhou, South Ring Road, No. 33, No. Patentee after: APT ELECTRONICS Co.,Ltd. Address before: 511458 Nansha District, Guangzhou, South Ring Road, No. 33, No. Patentee before: APT ELECTRONICS Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131023 |