CN204285310U - Optical lens, lamp bar and down straight aphototropism mode set - Google Patents

Abstract

The utility model discloses a kind of optical lens, lamp bar and down straight aphototropism mode set, the end face that described optical lens comprises bottom surface and is oppositely arranged with described bottom surface, arc convex is formed with to described optical lens indent in the middle part of described bottom surface, described arc convex is incidence surface, described end face is exiting surface, and at least side of described bottom surface is provided with the diffusing structure for carrying out scattering to light.Optical lens of the present utility model, lamp bar and down straight aphototropism mode set, by arranging diffusing structure on the bottom surface of optical lens, the light being entered into optical lens inside by described incidence surface is reflected further, with this by divergence of beam, and then ensure that the uniformity of the light penetrated by described exiting surface.

Description

Optical lens, light bar and direct type backlight module

technical field

The utility model relates to the display field, in particular to an optical lens, a lamp bar and a direct-type backlight module.

Background technique

A liquid crystal display (LCD, Liquid Crystal Display) has many advantages such as thin body, power saving, and no radiation, and has been widely used. Most of the liquid crystal display devices currently on the market are backlight liquid crystal display devices, which include a liquid crystal panel and a backlight module. The working principle of the liquid crystal panel is to place liquid crystal molecules between two parallel glass substrates. There are many vertical and horizontal small wires between the two glass substrates. The direction of the liquid crystal molecules is controlled by electrifying or not, and the light of the backlight module is refracted. Come out to generate the picture. Since the liquid crystal panel itself does not emit light, the light source provided by the backlight module is needed to display images normally. Therefore, the backlight module becomes one of the key components of the liquid crystal display device. Backlight modules are divided into side-type backlight modules and direct-type backlight modules according to the incident position of the light source. The direct type backlight module is to set the backlight such as CCFL (Cold Cathode Fluorescent Lamp, cathode fluorescent lamp) or LED (Light Emitting Diode) behind the LCD panel to directly form a surface light source for the LCD panel.

Existing direct-type backlight modules generally include a backplane, a backlight on the backplane and a diffusion plate on top of the backlight. The backlight includes several light strips, and each light strip includes a circuit board 1. The LED lamp installed and electrically connected to the circuit board and the optical lens arranged above the LED lamp, the optical transmission makes the light uniform through light mixing, thereby ensuring the uniformity of illumination of the backlight source.

However, with the emergence of high-power LED lamps, under the same brightness requirements, the number of LED lamps required is getting smaller and smaller. After the number of LED lamps is reduced, traditional optical lenses cannot effectively meet the requirements of uniform light mixing, affecting the effect of the product.

Utility model content

The main purpose of the utility model is to provide an optical lens, a light bar and a direct-lit backlight module, aiming at solving the technical problem that the existing optical lens cannot effectively mix light evenly.

In order to achieve the above object, the utility model provides the optical lens, the optical lens includes a bottom surface and a top surface opposite to the bottom surface, and the middle part of the bottom surface is concave to the optical lens to form an arc-shaped protrusion , the arc-shaped protrusion is a light-incident surface, the top surface is a light-exit surface, and at least one side of the bottom surface is provided with a light-scattering structure for scattering light.

Preferably, the astigmatism structure includes a convex structure that is recessed from the bottom surface of the optical lens, and the distance from the top of the convex structure to the bottom surface is shorter than the distance between the top of the convex structure and the bottom surface. The distance is small.

Preferably, the protrusion structure is a conical protrusion, and there are several conical protrusions arranged around the arc-shaped protrusion.

Preferably, the distances from the top of the conical protrusion to the bottom surface are not equal.

Preferably, the apex angles of the conical protrusions are not equal.

Preferably, the protruding structure is an arc-shaped structure, and there are several protruding structures arranged around the arc-shaped protrusion.

Preferably, the light-scattering structure further includes an extension structure extending from the bottom surface away from the side of the optical lens, the protrusion structure and the extension structure are arc-shaped, and the extension structure and the protrusion structure Arranged at intervals, the extension structure and the protrusion structure are connected together to form a wave-shaped structure.

Preferably, the light-emitting surface includes two convex curved surfaces protruding away from the optical lens, and the two convex curved surfaces are distributed on both sides of the middle part of the bottom surface.

In addition, in order to achieve the above object, the utility model also provides a light bar, which includes a circuit board, a luminous body installed and electrically connected to the circuit board, and an optical lens arranged above the luminous body , the optical lens includes a bottom surface and a top surface opposite to the bottom surface, the middle part of the bottom surface is concaved toward the optical lens to form an arc-shaped protrusion, the arc-shaped protrusion is a light incident surface, and the top surface The surface is a light-emitting surface, and at least one side of the bottom surface is provided with a light-scattering structure for scattering light, and the luminous body is correspondingly provided directly below the arc-shaped protrusion.

In addition, in order to achieve the above purpose, the utility model also provides a direct-type backlight module, the direct-type backlight module includes a backplane, a backlight arranged on the bottom plate of the backplane, and a backlight arranged above the backlight. The backlight also includes several light bars, the light bars include a circuit board, a luminous body installed and electrically connected to the circuit board, and an optical lens arranged above the luminous body. The optical lens includes a bottom surface and a top surface opposite to the bottom surface. The middle part of the bottom surface is concaved to the optical lens to form an arc-shaped protrusion, the arc-shaped protrusion is a light incident surface, and the top surface is On the light-emitting surface, at least one side of the bottom surface is provided with a light-scattering structure for scattering light, and the illuminant is correspondingly provided directly below the arc-shaped protrusion.

The optical lens, light bar and direct-lit backlight module of the present utility model further reflect the light entering the optical lens from the light incident surface by setting an astigmatism structure on the bottom surface of the optical lens, so as to diverge the light, Furthermore, the uniformity of the light emitted from the light-emitting surface is ensured.

Description of drawings

Fig. 1 is the sectional structure schematic diagram of the first embodiment of the utility model optical lens;

Fig. 2 is the sectional structure schematic diagram of the second embodiment of the utility model optical lens;

Fig. 3 is the schematic cross-sectional structure diagram of the third embodiment of the optical lens of the present invention;

Fig. 4 is the schematic cross-sectional structure diagram of the fourth embodiment of the optical lens of the present invention;

5 is a schematic cross-sectional structure diagram of a fifth embodiment of the optical lens of the present invention;

6 is a schematic cross-sectional structure diagram of the sixth embodiment of the optical lens of the present invention;

Fig. 7 is a schematic cross-sectional structure diagram of the light bar of the present invention;

FIG. 8 is a schematic cross-sectional structure diagram of the direct type backlight module of the present invention.

The realization of the purpose, functional features and advantages of the utility model will be further explained with reference to the accompanying drawings in combination with the embodiments.

Detailed ways

It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

The utility model provides an optical lens. Referring to FIG. 1 , in one embodiment, the optical lens includes a bottom surface 200 and a top surface 400 opposite to the bottom surface 200 , and the middle part of the bottom surface 200 faces inwardly of the optical lens. The concave shape is formed with an arc-shaped protrusion 220, the arc-shaped protrusion 220 is a light incident surface, the top surface 400 is a light exit surface, and at least one side of the bottom surface 200 is provided with a light scattering structure 240 for scattering light. Specifically, the light-scattering structure 240 is disposed around the arc-shaped protrusion 220 . The light-scattering structure 240 further reflects the light entering the optical lens from the light-incident surface, so as to diverge the light, thereby ensuring the uniformity of the light emitted from the light-emitting surface.

Further, in this embodiment, the light-scattering structure 240 includes a convex structure that is recessed from the bottom surface 200 to the inside of the optical lens, and the distance from the top of the convex structure to the bottom surface 200 is shorter than the arc The distance from the top of the shaped protrusion 220 to the bottom surface 200 is small. The light enters the optical lens from the light-incident surface and is reflected and scattered by the light-emitting structure 240 before being emitted from the light-emitting surface, thereby ensuring the uniformity of the light emitted from the light-emitting surface.

Further, the light-emitting surface includes two convex curved surfaces protruding away from the optical lens, and the two convex curved surfaces are distributed on both sides of the middle of the bottom surface 200. Preferably, the two convex curved surfaces The curved surfaces are arranged symmetrically and can be distributed around the middle of the bottom surface, further ensuring the uniformity of light. The specific description of the shape of the light-emitting surface here is only to illustrate the utility model more clearly, but not to limit the utility model. Other shapes of the light-emitting surface can also achieve the technical effects of the utility model, such as light The surface is a continuous curved surface, or the light-emitting surface is stepped, which specifically includes two symmetrically arranged convex curved surfaces arranged in the middle, a first annular plane arranged on the periphery of the convex curved surface, and a first annular plane arranged on the periphery of the first annular plane and The second annular plane and the like provided stepwise with the first annular plane are not limited here.

Further, in this embodiment, the protrusion structure is a conical protrusion, and there are several conical protrusions arranged around the arc-shaped protrusion 220 . There is at least one conical protrusion, which is arranged on the periphery of the arc-shaped protrusion 220. When there are multiple conical protrusions, they are arranged around the arc-shaped protrusion 220 at intervals. The distance can be set according to needs, and there is no limitation here.

Specifically, the distances from the tops of the tapered protrusions to the bottom surface 200 may be equal or unequal. And, the vertex angle of described conical protrusion can be sharp angle (as shown in Figure 2) or rounded corner (as shown in Figure 3), and when the vertex angle of described conical protrusion is sharp angle, its The angles can also be equal or unequal, and the distance from the top of the conical protrusion to the bottom surface 200, the structure of the apex angle of the conical protrusion and the apex angle of the conical protrusion can be randomly combined, For example, the distance from the top of the conical protrusion close to the arc-shaped protrusion to the bottom surface is larger than the distance from the top of the conical protrusion far away from the arc-shaped protrusion to the bottom surface, or it may be from the top to the bottom surface. The conical protrusions with a large distance from the bottom surface and the conical protrusions with a small distance from the top to the bottom surface are arranged at intervals, which is not limited at this time. However, the above-mentioned technical effect of ensuring the uniformity of light emitted from the light-emitting surface can be achieved.

Further, referring to FIG. 4 , in this embodiment, the protruding structure is an arc-shaped structure, and there are several protruding structures arranged around the arc-shaped protrusion 220 , and the top of the arc-shaped structure is arc shape. Specifically, there is at least one arc structure, which is arranged on the periphery of the arc protrusion 220. When there are more than one arc structure, the arc structure is arranged around the arc protrusion 220 at intervals, and the interval is The distance can be set according to needs, and there is no limitation here.

Preferably, referring to FIG. 5 , the light-scattering structure 240 can also be an arc-shaped structure protruding from the bottom surface 200 toward the direction away from the optical lens, which is also at least one, and is arranged on the arc-shaped protrusion 220 When there are multiple arc-shaped structures, they are set around the arc-shaped protrusions 220, and the distance between the arc-shaped structures can be set according to the actual situation, which is not limited here, but can also be The above-mentioned technical effect of ensuring the uniformity of light emitted from the light-emitting surface is achieved.

Further, referring to FIG. 6 , in this embodiment, the light-scattering structure 240 also includes an extension structure extending from the bottom surface 200 to the side away from the optical lens and a convex structure concave toward the inside of the optical lens. , the protruding structure and the extending structure are both arc-shaped, the extending structure and the protruding structure are arranged at intervals, the protruding structure and the extending structure are at least one respectively, when the protruding structure and the extending structure are both When there are multiple, the extension structure and the protrusion structure are connected together to form a wave-shaped structure. Specifically, the curvature of the protruding structure and the extension structure may be the same or different, both of which can achieve the above-mentioned technical effect of ensuring the uniformity of the light emitted from the light-emitting surface.

The utility model provides a light bar. Referring to FIG. 7 , in one embodiment, the light bar includes a circuit board 100 , a luminous body 300 installed and electrically connected to the circuit board 100 , and a The optical lens 500 above the body 300, the optical lens 500 includes the structure of the optical lens in all the embodiments shown in Figs. directly below the arc-shaped protrusion 220 .

The utility model provides a direct-type backlight module. Referring to FIG. 8, in one embodiment, the direct-type backlight module includes a backplane 700, a backlight source 800 disposed on the backplane 700, and a The diffusion plate 900 above the backlight 800, the backlight 800 includes several light bars 820, the light bars 820 are the light bars shown in FIG. The structure of the optical lens in all the embodiments will not be repeated here, and the illuminant 300 is correspondingly disposed directly under the arc-shaped protrusion 220 .

In summary, the optical lens, light bar and direct-lit backlight module of the present invention further reflect the light that enters the optical lens from the light incident surface by setting an astigmatism structure on the bottom surface of the optical lens, thereby to diverge the light, thereby ensuring the uniformity of the light emitted from the light-emitting surface.

The above are only preferred embodiments of the present utility model, and are not intended to limit the patent scope of the present utility model. Any equivalent structure or equivalent process conversion made by using the description of the utility model and the contents of the accompanying drawings, or directly or indirectly used in other related All technical fields are all included in the scope of patent protection of the utility model in the same way.

Claims (10)

1. an optical lens, it is characterized in that, the end face that described optical lens comprises bottom surface and is oppositely arranged with described bottom surface, arc convex is formed with to described optical lens indent in the middle part of described bottom surface, described arc convex is incidence surface, described end face is exiting surface, and at least side of described bottom surface is provided with the diffusing structure for carrying out scattering to light.

2. optical lens as claimed in claim 1, it is characterized in that, described diffusing structure comprises by the bulge-structure of described bottom surface to described optical lens inner recess, and the top of described bulge-structure is less to the distance of described bottom surface than described arc convex top to the distance of described bottom surface.

3. optical lens as claimed in claim 2, it is characterized in that, described bulge-structure is tapered protrusion, and described tapered protrusion is several, arranges around described arc convex.

4. optical lens as claimed in claim 3, it is characterized in that, the top of described tapered protrusion is unequal to the distance of described bottom surface.

5. optical lens as claimed in claim 3, it is characterized in that, the corner angle of described tapered protrusion is unequal.

6. optical lens as claimed in claim 2, it is characterized in that, described bulge-structure is arcuate structure, and described bulge-structure is several, arranges around described arc convex.

7. optical lens as claimed in claim 2, it is characterized in that, described diffusing structure also comprises by described bottom surface to away from the extended extended structure in described optical lens side, described bulge-structure and extended structure are arc, described extended structure and described bulge-structure interval are arranged, and described extended structure and described bulge-structure are joined together to form a wavy shaped configuration.

8. the optical lens as described in claim 1 to 7 any one, is characterized in that, described exiting surface comprises two to away from the outstanding convex surface in described optical lens side, and described two convex surfaces are distributed in the both sides in the middle part of described bottom surface.

9. a lamp bar, described lamp bar comprises circuit board, installation the illuminator be electrically connected on described circuit board, it is characterized in that, also comprise the optical lens described in any one of the claims 1 to 8, described illuminator correspondence is located at immediately below described arc convex.

10. a down straight aphototropism mode set, the diffuser plate that described down straight aphototropism mode set comprises backboard, is located at the backlight on described backboard and is located at above described backlight, is characterized in that, described backlight also comprises the lamp bar described in the claims 9.