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Manufacturing method of elliptical TV backlight lens

2020-02-04

The utility model belongs to the technical field of liquid crystal display, in particular to an oval TV backlight lens.



Background technology:

The straight down backlight module is generally divided into two types according to the shape of the lens: refracting type and reflecting type. In the design of the ultra-thin scheme of LCD TV, the reflecting type has a greater advantage, which has a smaller mixing distance, and can obtain a larger range of illumination spot and a larger Angle of light intensity distribution. The conventional reflective backlight lens is circular and symmetrical, and its radiation spot is circular and symmetrical. It has poor flexibility in lamp bead arrangement, and requires more lamp beads, which leads to higher production cost.


Technical realization elements:

The purpose of the utility model is to overcome the disadvantages of the reflective backlight lens in the above existing technology, such as poor flexibility in lamp bead arrangement, large number of lamp beads required and high production cost, and to provide an oval TV backlight lens.

The utility model is realized as follows: Oval TV backlight lens, ontology, including a lens on the surface of the lens body including is located in the bottom into the plain, is located in the upper surface reflective surface and is located in the week of side wall and the shape to oval cross section of smooth, among them, the described into smooth bottom structure has light source installed slot, into the smooth including in installation groove at the top of the roof surface into the light and is located in the installation groove side weeks into the light side wall surface, described in the reflective surface is used to described from the top of the light incident total reflection of light to a smooth surface, The emitting surface comprises the upper emitting surface of the light for total reflection of the emitting surface and the lower emitting surface of the light for incident from the side wall surface of the incoming light.



As an optimal scheme of the utility model, the lens body also comprises a microstructural surface external to the incoming light surface, which is provided on the lower end surface and is used for refracting the incoming light surface to the lower part and reflecting the light aggregation on the outgoing light surface.



The elliptic TV backlight lens provided by the utility model has an elliptic cross section shape of the emitting surface and an elliptic emitting spot, making the lamp bead arrangement mode of the LCD TV more flexible and reducing the number of required lamp bead to some extent, which can further reduce the production cost.


The appended drawings show

In order to more clearly this utility model example existing technology or the technical proposal, the following described for example or existing technology in the appended drawings of the need to use introduce simply, clearly, described below the appended drawings are some of the cases, the utility model for the field common technical personnel, on the premise of not giving creative labor, can also according to the appended drawings for other appended drawings.

The attached drawings below are only intended to provide a schematic description and explanation of the utility model and do not limit the scope of the utility model.

FIG. 1 is the schematic diagram of the elliptical backlight lens provided by the embodiment of the utility model;

FIG. 2 is the section diagram of a-a in FIG. 1;

FIG. 3 is a structural diagram of the elliptical backlight lens provided by an embodiment of the utility model.

Specific mode of implementation

In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model is further described in detail with the attached drawings and embodiments as follows.It should be understood that the specific embodiments described herein are used only to explain the utility model and are not used to qualify the utility model.

Unless otherwise defined, the technical terms or scientific terms used in the utility model shall have a general meaning understood by persons with general skills in the field to which the utility model belongs.The "first", "second" and similar terms used in the utility model do not indicate any order, quantity or importance, but are only used to distinguish different components.Similarly, words like "one," "one," or "this" do not indicate a quantitative limit, but rather the existence of at least one.Words like "include" or "include" mean that the element or object preceding the word covers the element or object listed after the word and its equivalent, without excluding other elements or objects.Words like "connected" or "connected" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect."Up", "down", "left", "right" and so on are only used to represent the relative position relationship. When the absolute position of the described object changes, the relative position relationship may also change correspondingly.

Implementation of the case

Please refer to figure 1 to figure 3, elliptic TV backlight lens, ontology, including a lens on the surface of the lens body including located at the lower end into the smooth 1, located at the upper end surface reflective surface 3 and is located in the week of side wall and a smooth shape to oval cross section of 2, among them, the smooth 1 below structure has light source installed slot, the smooth including 1 is located in the installation groove at the top of the roof surface into the light and is located in the installation groove side weeks into the light side wall surface, reflective surface for 3 total reflection from the top of the light incident light to smooth out 2,The emitting surface 2 includes the upper emitting surface of the light used for total reflection of the emitting reflective surface and the lower emitting surface of the light used for incident from the side wall surface of the incoming light.

In the above, as shown in FIG. 1-3, specifically, the light inlet surface 1: including the top surface of the light inlet and the side wall surface of the light inlet, the light of the LED light source located in the installation slot of the light source can be divided into two parts to discharge.

Reflector 3: using the principle of total reflection, the incident ray from the top of the incoming ray is reflected to the outgoing ray 2, and then the ray is refracted to the image screen through the outgoing ray 2.

Exit surface 2: it is divided into the upper exit surface and the lower exit surface. The incident ray on the top surface of the incoming light exits from the upper exit surface, and the incident ray on the side wall of the incoming light exits from the lower exit surface.

As a optimization of the utility model, the lens body also included in in the bottom surface into a smooth 1 external used to refract into the smooth 1 gathered to the bottom of the light reflection to smooth the microstructure of surface 2 and 4, the microstructure with smooth surface 4 will 1 to part at the bottom of the mixed light refraction regrouped, to a certain extent, control the transition of flare, increase the light efficiency lens.

Specifically, through the secondary optical design of the lens body, an elliptic, uniform illumination and good color performance radiation spot can be obtained.

It is understandable that the upper, lower, top and side etc. described in this embodiment are referred to in FIG. 2.

In the above, it is understandable that surface 1, surface 2, surface 3 and surface 4 of microstructure can be free-form surface, specific, as long as the above functions and effects can be achieved, there are no specific restrictions.

The utility model provides an oval TV backlight lens. Compared with the prior art, the cross section shape of the emitting surface is oval, and the emitting light spot is an oval, which makes the lamp bead arrangement mode of LCD TV more flexible and can reduce the number of required lamp bead to some extent, which can further reduce the production cost.

The following points need to be explained:

(1) unless otherwise defined, the same label represents the same meaning in the embodiments of the utility model and the appended drawings.

(2) in the appended drawings of the embodiments of the utility model, only the structure involved with the embodiments of the utility model is involved, while other structures can refer to the usual design.

(3) for the sake of clarity, the thickness of the layer or area is magnified in the attached diagram used to describe the embodiment of the utility model.It is understood that when a element such as a layer, membrane, region, or substrate is said to be "above" or "below" another element, the element may be "directly" above or below the other element, or an intermediate element may exist.

(4) without conflict, the characteristics of the same embodiment and different embodiments of the utility model can be combined with each other.

The above are only better embodiments of the utility model and are not used to limit the utility model. Any modification, equivalent replacement or improvement made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.


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