CN210402973U

CN210402973U - Light source, backlight module and display equipment

Info

Publication number: CN210402973U
Application number: CN201921233777.7U
Authority: CN
Inventors: 陈国麟; 陈远鸿; 胡盛森
Original assignee: Huizhou Shiwei New Technology Co Ltd
Current assignee: Huizhou Shiwei New Technology Co Ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2020-04-24
Anticipated expiration: 2029-07-31

Abstract

The utility model discloses a light source, backlight unit and display device, wherein this light source includes printed circuit board, LED chip and lens, the LED chip is located on the printed circuit board, and is connected with the printed circuit board electricity, the lens cover is located around the LED chip, lens are close to one side of LED chip is equipped with a plurality of concave points. The utility model discloses technical scheme aims at improving the homogeneity that light distributes.

Description

Light source, backlight module and display equipment

Technical Field

The utility model relates to a show technical field, in particular to light source, backlight unit and display device.

Background

With the development of backlight display technology, the direct type backlight display has an increasing market share and problems due to the cost advantage. The most typical of these is uneven display. At present, the lamp spacing is changed frequently in the industry, the lamp brightness is improved, or the problem of uneven display effect is solved by adopting a printing film, but the cost is increased, and the production efficiency is reduced.

The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a light source, backlight unit and display device aims at improving the homogeneity that light distributes.

To achieve the above object, the present invention provides a light source including:

a printed circuit board;

the LED chip is arranged on the printed circuit board and is electrically connected with the printed circuit board;

the lens cover is arranged around the LED chip, and one side of the lens, which is close to the LED chip, is provided with a plurality of concave points.

Further, a plurality of concave points are formed on the surface of the lens in a laser dotting mode.

Further, a plurality of the concave points are arranged at even intervals.

Further, the concave points are arranged in the shape of a semicircular groove or a regular pentagonal groove.

The utility model also provides a backlight module, this backlight module include foretell light source, backplate and reflector plate, the backplate is equipped with the holding tank, the light source is located the backplate, and hold in the holding tank, the reflector plate is located the backplate towards one side of light source, and correspond the light source has been seted up and has been kept away the position hole.

Furthermore, the backlight module further comprises a diffusion plate and an optical film, the diffusion plate covers the notch of the accommodating groove, and the optical film is arranged on one side, back to the accommodating groove, of the diffusion plate.

Furthermore, the back plate is provided with an extending edge extending out of the accommodating groove at a position close to the accommodating groove, the backlight module further comprises a rubber frame, the rubber frame and the extending edge enclose to form a positioning groove, and the edges of the optical membrane and the diffusion plate are limited in the positioning groove.

Further, the frame of gluing includes spacing portion and the extension of body coupling, spacing portion with the limit butt of extending, the extension by spacing portion to the notch of holding tank is buckled and is extended, spacing portion with the extension and the limit of extending encloses to close and forms the constant head tank.

Furthermore, the back plate further comprises a folded edge connected with the extending edge, a limiting groove is formed by the folded edge and the extending edge in a surrounding mode, and the limiting portion is limited in the limiting groove.

The utility model also provides a display device, this display device include foretell backlight unit and display panel.

The utility model discloses among the technical scheme, when the light that the LED chip sent passed lens, utilized the dispersion of the concave point that distributes on the lens for light evenly jets out lens, thereby improves the homogeneity that light distributes, with the optics dark space that reduces the light source, and then solves the uneven yellow problem that leads to of light distribution, and improved light energy utilization.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic view of a portion of the backlight module shown in FIG. 1;

fig. 4 is a cross-sectional view taken along line B-B of fig. 3.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Light source	14	Limiting groove
20	LED chip	30	Reflector plate
				40	Lens and lens assembly	31	Avoiding hole
41	Pits	50	Optical film
				60	Printed circuit board	70	Rubber frame
200	Backlight module	71	Limiting part
				10	Back plate	72	Extension part
11	Accommodating tank	73	Locating slot
				12	Extension edge	90	Diffusion plate
13	Edge folding

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The present invention provides a light source 100.

Referring to fig. 1 to 3, the light source 100 includes a printed circuit board 60, an LED chip 20 and a lens 40, the LED chip 20 is disposed on the printed circuit board 60 and electrically connected to the printed circuit board 60, the lens 40 covers the LED chip 20, and a plurality of concave points 41 are disposed on a side of the lens 40 adjacent to the LED chip 20.

It should be noted that the lens 40 can be directly packaged or adhered on the LED chip 20, and is integrated with the LED chip 20. The concave points 41 provide various incident angles for the incident light, thereby changing the emitting direction of the light, increasing the incident intensity of the area with less incident light, and achieving the uniformity of the luminance.

The utility model discloses among the technical scheme, when the light that LED chip 20 sent passed lens 40, utilized the dispersion of the concave point 41 that distributes on lens 40 for lens 40 is evenly jeted out to light, thereby improves the homogeneity that light distributes, with the optics dark space that reduces light source 100, and then solves the uneven yellowing problem that leads to of light distribution, and improved light energy utilization.

Specifically, a plurality of pits 41 are formed by laser dotting on the surface of the lens 40.

In this embodiment, the pits 41 may be formed by dotting the lens 40 on a side thereof adjacent to the wick in a laser dotting manner, so that the accuracy of the pits 41 can be improved, and the optical effect of the lens 40 can be improved.

Referring to fig. 4, a plurality of concave points 41 are uniformly spaced.

In the present embodiment, the plurality of concave points 41 are uniformly spaced, and the mesh-type concave points 41 are designed such that the lens 40 has no dark area, thereby improving the uniformity of the brightness. Light is taken in through different portions of the lens 40 to provide different incident angles, and yellow edges of the light spot edges are reduced, thereby improving the display effect. Of course, the concave points 41 can also be connected in sequence and arranged in a wave shape; or, with the increase of the distance from the lampwick, the number of the concave points 41 is gradually increased, that is, the concave points 41 close to the lampwick are sparse, and the concave points 41 far away from the lampwick are dense, so that the light intensity near the lampwick can be weakened, the light number far away from the lampwick is increased, the luminance of a brighter area is reduced, the luminance of a darker area is improved, the uniformity of the luminance is improved, and the display effect is improved.

Specifically, the concave points 41 are arranged in a semicircular groove or a regular pentagonal groove.

In the present embodiment, the concave point 41 is a high-density distributed circle or regular pentagon, so that the incident light is incident from different parts of the concave point 41 at different angles, thereby improving the macula lutea problem at the edge of the spot. The design of the pits 41 corresponds to the structure of the wick and the display screen, providing more angles of incidence for the light. The specific processing method is that before the lens 40 is processed and molded, laser is adopted on the mold to perform laser dotting on the mold area corresponding to the lens 40 to form small pits, the cross section of each small pit is in a semicircular or regular pentagon arrangement, then the mold is utilized to perform molding on the lens 40, the precision of the concave point 41 is improved, and therefore the optical effect of the lens 40 is improved.

The utility model discloses still provide a backlight module 200, please refer to fig. 1 and fig. 3, this backlight module 200 includes foretell light source 100, backplate 10 and reflector plate 30, and backplate 10 is equipped with holding tank 11, and backplate 10 is located to light source 100 to hold in holding tank 11, one side of backplate 10 towards light source 100 is located to reflector plate 30, and has seted up and has kept away a hole 31 corresponding to light source 100.

In the present embodiment, the back plate 10 includes a bottom plate and a side plate, which are combined to form the receiving groove 11. The light source 100 may be provided in plurality, and the plurality of light sources 100 are spaced apart from the bottom plate and the side plate to increase the uniformity of light emission and reduce the occurrence of dark regions. It can be understood that the light reflected by the lens 40 can enter the lens 40 under the reflection action of the reflector 30 and then pass through the light exit surface of the lens 40, so as to reduce the loss of light energy, thereby further improving the utilization rate of light energy.

Referring to fig. 1 and fig. 2, the backlight module 200 further includes a diffusion plate 90 and an optical film 50, the diffusion plate 90 covers the opening of the accommodating groove 11, and the optical film 50 is disposed on a side of the diffusion plate 90 opposite to the accommodating groove 11.

In the present embodiment, the optical film 50 and the diffusion plate 90 are used to improve the display effect. The size of the optical film 50 is equivalent to that of the diffusion plate 90, and the diffusion plate 90 can be attached to the notch of the receiving groove 11. After the light rays are emitted out of the lens 40, the light rays are emitted out through the diffusion plate 90 and the optical film 50 in sequence, and the diffusion plate 90 enables the light rays to be diffused more uniformly, so that the influence of nonuniform light emission on the display effect is avoided. The optical film 50 may be a brightness enhancement film that increases the brightness of the light and avoids optical dark areas.

Referring to fig. 2, the back plate 10 has an extending edge 12 extending outward from the receiving cavity 11 near the notch of the receiving cavity 11, the backlight module 200 further includes a plastic frame 70, the plastic frame 70 and the extending edge 12 enclose a positioning groove 73, and the edges of the optical film 50 and the diffusion plate 90 are limited in the positioning groove 73.

In this embodiment, the plastic frame 70 can be connected to the outer extension 12 by a snap-fit method, but other methods, such as a fitting hole and a fastener, can also be used to fix the plastic frame 70 to the backboard 10. The edges of the optical film 50 and the diffusion plate 90 are limited in the positioning groove 73, so that the optical film 50 and the diffusion plate 90 are limited, the display effect is prevented from being influenced by sliding, the structure is simple, and the processing is convenient. In addition, a protrusion or a concave portion may be disposed on the extension edge 12, a concave portion or a protrusion may be disposed on the rubber frame 70, a positioning hole is formed on the protrusion corresponding to the diffusion plate 90 and the optical film 50, the protrusion passes through the diffusion plate 90 and the optical film 50 to be fastened with the concave portion, the diffusion plate 90 and the optical film 50 are reinforced, and the stability of the overall structure is improved.

Referring to fig. 2, the rubber frame 70 includes a limiting portion 71 and an extending portion 72 integrally connected, the limiting portion 71 abuts against the outer extension 12, the extending portion 72 is bent and extended from the limiting portion 71 to the notch of the accommodating groove 11, and the limiting portion 71, the extending portion 72 and the outer extension 12 enclose to form a positioning groove 73.

Specifically, the rubber frame 70 includes a limiting portion 71, and the limiting portion 71 and the extension edge 12 may be connected in a snap-fit manner or fixed by a screw. The extension 72 limits the diffusion plate 90 and the optical film 50, and prevents the diffusion plate 90 and the optical film 50 from falling off. The length of the overlap of the extension 12 and the extension 72 determines the depth of the positioning slot 73, thereby affecting the fixing effect of the diffuser plate 90 and the optical film 50. Therefore, the overlapping length of the extension edge 12 and the extension part 72 can be set according to actual needs.

Referring to fig. 2, the back plate 10 further includes a folded edge 13 connected to the extended edge 12, the folded edge 13 and the extended edge 12 enclose to form a limiting groove 14, and the limiting portion 71 is limited in the limiting groove 14.

In the embodiment, the folded edge 13 and the extended edge 12 enclose to form a limiting groove 14, and the limiting portion 71 of the rubber frame 70 can be in interference fit with the limiting groove 14, so as to increase the fastening strength of the rubber frame 70 and the back plate 10. The stopper portion 71 may be fastened by screws at a position abutting against the outer flange 12, or may be fastened by screws at a position corresponding to the flange 13. Preferably, the back plate 10 is of an integrally formed structure. That is, the bottom wall, the side wall, the outer extension 12 and the folded edge 13 of the receiving groove 11 are integrally formed, so that the backlight module 200 can be conveniently mounted, and the production efficiency can be improved.

The present invention further provides a display device (not shown), which includes the backlight module 200 and the display panel. The specific structure of the backlight module 200 refers to the above embodiments, and since the display device adopts all the technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A light source, comprising:

a printed circuit board;

the lens is covered around the LED chip, and one side of the lens, which is adjacent to the LED chip, is provided with a plurality of concave points; the number of the concave points is gradually increased from the position close to the LED chip to the position far away from the LED chip.

2. The light source of claim 1, wherein a plurality of said pits are formed by laser dotting on said lens surface.

3. The light source of claim 2, wherein a plurality of said pits are evenly spaced.

4. The light source of claim 3, wherein the pits are arranged as semicircular grooves or as regular pentagonal grooves.

5. A backlight module, comprising the light source of any one of claims 1 to 4, a back plate and a reflector plate, wherein the back plate has a receiving groove, the light source is disposed on the back plate and received in the receiving groove, and the reflector plate is disposed on a side of the back plate facing the light source and provided with a clearance hole corresponding to the light source.

6. The backlight module as claimed in claim 5, wherein the backlight module further comprises a diffuser plate covering the notch of the receiving cavity and an optical film disposed on a side of the diffuser plate opposite to the receiving cavity.

7. The backlight module as claimed in claim 6, wherein the back plate has an extended edge extending outward from the receiving cavity adjacent to the opening of the receiving cavity, the backlight module further comprises a plastic frame, the plastic frame and the extended edge form a positioning groove, and the edges of the optical film and the diffusion plate are retained in the positioning groove.

8. The backlight module as claimed in claim 7, wherein the frame includes a position-limiting portion and an extending portion integrally connected to each other, the position-limiting portion abuts against the outer edge, the extending portion is bent and extended from the position-limiting portion to the notch of the receiving groove, and the position-limiting portion, the extending portion and the outer edge surround to form the positioning groove.

9. The backlight module as claimed in claim 8, wherein the back plate further includes a folded edge connected to the outer extended edge, the folded edge and the outer extended edge form a limiting groove, and the limiting portion is limited in the limiting groove.

10. A display device comprising the backlight module according to any one of claims 5 to 9 and a display panel.