CN204678254U

CN204678254U - Multidirectional refraction type backlight lens and the down straight aphototropism mode set based on these lens

Info

Publication number: CN204678254U
Application number: CN201520235871.1U
Authority: CN
Inventors: 蒋礼旺
Original assignee: DONGGUAN OUKE OPTOELECTRONICS TECHNOLOGY Co Ltd
Current assignee: DONGGUAN OUKE OPTOELECTRONICS TECHNOLOGY Co Ltd
Priority date: 2015-04-20
Filing date: 2015-04-20
Publication date: 2015-09-30
Anticipated expiration: 2025-04-20

Abstract

The utility model provides a kind of multidirectional refraction type backlight lens and the down straight aphototropism mode set based on these lens, the multidirectional refraction type backlight lens that the utility model provides, comprise rectangular base, described matrix lower plane center is provided with taper blind hole, on described matrix, plane extends upward the free form surface boss of a center depression, the light that LED sends is injected through taper blind hole, due to the change of free form surface curvature and surface normal, light through the plane of incidence along ZX, ZY plane refraction, simultaneously, because taper entrance aperture exists the change of curvature and Surface Method phase, incident light also can produce refraction in XY plane, light through superrefraction reflects outgoing by the free form surface on surface again, in like manner, due to the curvature of the free form surface body of upper surface and Surface Method to change, light can form two direction refractions of XZ or YZ and XY plane through free form surface, finally go out to penetrate uniform rectangular light spot.

Description

Multidirectional refraction type backlight lens and the down straight aphototropism mode set based on these lens

Technical field

The utility model belongs to optical lens field, particularly relates to multidirectional refraction type backlight lens.

Background technology

LED (light emitting diode) arranges in pairs or groups lens and diffuser plate, the directly-down liquid crystal backlight module of the composition such as bright enhancement film is energy-conservation due to it, long service life, assemble easy to maintenance, with low cost, the advantage that color representation is good widely uses in LCD TV and LCDs and plate lighting light fixture.LED direct-type backlight has surmounted the first-selection that CCFL cold-cathode tube and LED side entrance back become the said goods, market demand sustainable growth.But, along with consumer is to the lightening requirement of LCD screen and LCD TV, and TV, screen complete-system vendor is to the requirement of the cost control (significantly reducing LED quantity) of backlight module, and existing LED direct-type backlight is more and more difficult to the requirement meeting complete-system vendor.By analysis, as the generation of not enough the problems referred to above that result in of performance of the secondary optical lens of most important part in LED directly-down liquid crystal backlight module.At present, the LED direct-type backlight secondary optical lens of the market mainstream has 2 kinds of modes: one is the refraction type as shown in Fig. 1-1 to Fig. 1-3; Two is reflective as shown in Fig. 2-1 to Fig. 2-3.According to Fig. 1-1 to Fig. 1-3, Fig. 2-1 to the basic structure in Fig. 2-3 and actual conditions, LED the luminous refraction through above-listed secondary optical lens and reflection, because the structure of secondary optical lens itself limits, cause light can only according to the unidirectional refraction of radial direction, therefore, its emergent light spot shape is circular light spot.We know, LED-backlit and plate lighting light fixture are by LED and secondary optical lens being arranged in a matrix fashion according to certain distance at screen (light-emitting plate) rear, the light that LED sends is through the refraction of secondary optical lens, project screen (light-emitting plate) with extensive angle, thus realize uniform planar light outgoing on the screen (light-emitting plate) of certain distance.The characteristic arranged due to downward back light matrix and above-listed secondary optical lens emergent light spot are circular characteristic, thus define 2 obvious defects, have impact on the increased quality of backlight module: 1, circular light spot hands over the dark space, hot spot junction of junction generation at matrix; 2, matrix arrangement X, easily produces bar and bar or strip light and shade band between the column and the column when Y-direction is non-equidistant arrangement.

Summary of the invention

The purpose of this utility model is to provide a kind of light can at ZX, ZY plane refraction, simultaneously also can at the multidirectional refraction type backlight lens with two directions refractions of XY plane refraction.XYZ is three reference axis of rectangular coordinate system in space respectively.

Another object of the present utility model is that providing a kind of can form one is superposed the uniform planar emergent light of mixing down straight aphototropism mode set by multiple rectangular light spot.

The utility model is achieved in that multidirectional refraction type backlight lens, it is characterized in that, comprises rectangular base, and described matrix lower plane center is provided with taper blind hole, and on described matrix, plane extends upward the free form surface boss of a center depression.

Preferably, described taper blind hole is the taper blind hole of oval cross section.

Preferably, described taper blind hole is the taper blind hole of circular cross-section.

Preferably, the minor face of the corresponding described free form surface boss of major axis of described oval cross section, the long limit of the corresponding described free form surface boss of minor axis of described oval cross section.

Preferably, described rectangular base four angles are fillet.

Preferably, described rectangular base corner is distributed with a connecting hole, and described connecting hole is cylindrical or conical.

A kind of down straight aphototropism mode set, comprise LED and multidirectional refraction type backlight lens, described multidirectional refraction type backlight lens are covered on described LED, and after described multidirectional refraction type backlight lens and described LED combine, matrix arranges.

The multidirectional refraction type backlight lens that the utility model provides, comprise rectangular base, described matrix lower plane center is provided with taper blind hole, on described matrix, plane extends upward the free form surface boss of a center depression, the light that LED sends is injected through taper blind hole, due to the change of free form surface curvature and surface normal, light through the plane of incidence along ZX, ZY plane refraction, simultaneously, because taper entrance aperture exists the change of curvature and Surface Method phase, incident light also can produce refraction in XY plane, light through superrefraction reflects outgoing by the free form surface on surface again, in like manner, due to the curvature of the free form surface body of upper surface and Surface Method to change, light can form two direction refractions of XZ or YZ and XY plane through free form surface, finally go out to penetrate uniform rectangular light spot.

A kind of down straight aphototropism mode set of the utility model, after described multidirectional refraction type backlight lens LED combination, rectangular base can arrange according to certain distance matrix, thus have multiple rectangle tabula rasa to superpose the uniform planar emergent light of mixing in the upper formation one of the screen (light-emitting plate) of backlight module, solve the problem of dark space, circular light spot matrix junction and strip light and shade band.

By following description also by reference to the accompanying drawings, the utility model will become more clear, and these accompanying drawings are for explaining embodiment of the present utility model.

Accompanying drawing explanation

Fig. 1-1 is refraction type backlight secondary optical lens schematic rear view in prior art.

Fig. 1-2 is refraction type backlight secondary optical lens cross-sectional schematic in prior art.

Fig. 1-3 is refraction type backlight secondary optical lens schematic front view in prior art.

Fig. 2-1 is reflective backlight secondary optical lens schematic rear view in prior art.

Fig. 2-2 is reflective backlight secondary optical lens cross-sectional schematic in prior art.

Fig. 2-3 is reflective backlight secondary optical lens schematic front view in prior art.

Fig. 3 is the utility model multidirectional refraction type backlight lens front views.

Fig. 4 is the utility model multidirectional refraction type backlight lens sectional views.

Fig. 5 is the utility model multidirectional refraction type backlight lens oval cross section and boss direction position view.

Fig. 6 is the utility model down straight aphototropism mode set structural representation.

Wherein: 1, matrix; 11, light entrance face; 12, light-emitting face; 2, free form surface boss; 3, taper blind hole; 4, connecting hole; L1, the long limit of free form surface boss; L2, free form surface boss minor face; AB, oval cross section major axis; CD, oval cross section minor axis; 01, multidirectional refraction type backlight lens; 02, LED.

Detailed description of the invention

Clearly understand to make the purpose of this utility model, technical scheme and advantage, below in conjunction with drawings and Examples, the utility model is further elaborated, be to be understood that, specific embodiment described herein only in order to explain the utility model, and is not used in restriction the utility model.

The multidirectional refraction type backlight lens that the utility model provides, in order to solve the defect of above-mentioned secondary optical lens, the utility model proposes a kind of light can at ZX, ZY plane refraction, the multidirectional refraction type backlight lens that simultaneously can reflect in the amount of the having direction of XY plane refraction.XYZ is three reference axis of rectangular coordinate system in space respectively.As Fig. 3, Fig. 4, shown in, the utility model is for comprising rectangular base 1, taper blind hole 3 is established at matrix 1 lower plane center, the similar rectangle of a profile is extended from rectangular base 1 upper surface, surrounding has fillet, raises gradually, the free form surface boss 2 caved in close to center from surrounding to center, free form surface boss 2 is the ruled surface of left, right, up, down symmetry.Taper blind hole inwall is light entrance face 11, light is incident from light entrance face 11, penetrate from light-emitting face 12, because the change of curvature and Surface Method are to change, light through the plane of incidence along ZX, ZY plane refraction, simultaneously, cross section due to entrance aperture is oval, exist curvature and Surface Method to change, incident light also can produce refraction in XY plane.Light through superrefraction passes through the refraction outgoing of the free form surface body of upper surface again, in like manner, due to the curvature of the free form surface body of upper surface and Surface Method to change, light can form two directions refractions of XZ or YZ and XY plane through free form surface, forms the uniform rectangular light spot of injection.

As shown in Figure 5, in figure, arrow represents a light refraction route, taper blind hole is the taper blind hole of oval cross section, the corresponding described free form surface boss minor face L2 of major axis A B of described oval cross section, the long limit L1 of the corresponding described free form surface boss of the minor axis CD of described oval cross section, makes emergent light spot be rectangle or more similar rectangle or square.

Taper blind hole also can be the taper blind hole of circular cross-section, and the taper blind hole of circular cross-section is adding processing more more convenient than the taper blind hole of oval cross section in man-hour, can play the effect of two direction refractions too, just there are differences in effect.

As shown in Figure 3, described rectangular base 1 four angles are fillet.

As shown in Fig. 3, Fig. 6, in Fig. 6, arrow represents a light refraction route, and the corner of rectangular base 1 is distributed with a connecting hole 4, and described connecting hole 4 is cylindrical or conical, for fixing described multidirectional refraction type backlight lens 01.

A kind of down straight aphototropism mode set, comprise LED 02 and multidirectional refraction type backlight lens 01, described multidirectional refraction type backlight lens 01 are covered on described LED 02, and described multidirectional refraction type backlight lens 01 combine rear matrix with described LED 02 and arrange.

LED in backlight module 02 and these multidirectional refraction type backlight lens 01 are combined, at a certain distance, matrix arranges, thus superposed the uniform planar emergent light of mixing by multiple rectangular light spot in the upper formation one of the screen (light-emitting plate) of backlight module, solve the problem of dark space, matrix junction and strip light and shade band.

These are only preferred embodiment of the present utility model, not in order to limit the utility model, all do within spirit of the present utility model and principle any amendment, equivalent to replace or improvement etc., all should be included within protection domain of the present utility model.

Claims

1. multidirectional refraction type backlight lens, is characterized in that, comprise rectangular base, and described matrix lower plane center is provided with taper blind hole, and on described matrix, plane extends upward the free form surface boss of a center depression.

2. multidirectional refraction type backlight lens as claimed in claim 1, is characterized in that, described taper blind hole is the taper blind hole of oval cross section.

3. multidirectional refraction type backlight lens as claimed in claim 1, is characterized in that, described taper blind hole is the taper blind hole of circular cross-section.

4. multidirectional refraction type backlight lens as claimed in claim 2, is characterized in that, the minor face of the corresponding described free form surface boss of major axis of described oval cross section, the long limit of the corresponding described free form surface boss of minor axis of described oval cross section.

5. as the multidirectional refraction type backlight lens in claim 1-4 as described in any one, it is characterized in that, described rectangular base four angles are fillet.

6., as the multidirectional refraction type backlight lens in claim 1-4 as described in any one, it is characterized in that, described rectangular base corner is distributed with a connecting hole, and described connecting hole is cylindrical or conical.

7. a down straight aphototropism mode set, it is characterized in that, comprise LED and multidirectional refraction type backlight lens as claimed in claim 1, described multidirectional refraction type backlight lens are covered on described LED, and after described multidirectional refraction type backlight lens and described LED combine, matrix arranges.