CN211348933U

CN211348933U - LED backlight source with uniform light color

Info

Publication number: CN211348933U
Application number: CN201922014098.7U
Authority: CN
Inventors: 叶俊杰
Original assignee: Shenyang Zhongkai Technology Co ltd
Current assignee: Shenyang Zhongkai Technology Co ltd
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-08-25
Anticipated expiration: 2029-11-20

Abstract

The utility model discloses a photochromic even LED backlight, including light guide plate, reflectance coating and PCB board, the joint has the PCB board on the light guide plate lateral wall, it has first lens-shading strip to bond on the light guide plate exterior wall, the bottom of light guide plate bonds and has the reflectance coating, the light guide plate upper surface bonds and has lower diffusion barrier, diffusion barrier upper surface bonds and has the membrane that adds lustre to down, and adds lustre to membrane upper surface bonds and has last diffusion barrier, it has the light screen to go up diffusion barrier upper surface bonding, the edge of light screen bonds and has the second lens-shading strip. The utility model discloses in, this photochromic even LED backlight is provided with two diffusion barrier at the upper surface of light guide plate, is last diffusion barrier and lower diffusion barrier respectively, and is provided with the membrane that adds lustre to between last diffusion barrier and the lower diffusion barrier, and such structural design compares in traditional direct diffusion barrier that sets up in the upper surface singleness of light guide plate, the improvement of maximization photochromic homogeneity, its result of use of effectual improvement.

Description

LED backlight source with uniform light color

Technical Field

The utility model relates to a backlight technical field especially relates to a photochromic even LED backlight.

Background

BackLight (BackLight) is a light source located behind a Liquid Crystal Display (LCD), and its lighting effect directly affects the visual effect of the liquid crystal display module (LCM). The liquid crystal display does not emit light, displays a graph or modulates light, the backlight source is widely applied to industries such as a touch screen, the backlight source, an LCD/LCM, a mobile phone, a tablet personal computer, a GPS, a solar battery and the like, the industries are in the leading level, a company multi-machine combined automatic film pasting production line realizes full-automatic production, more than 80% of production workers can be saved for customers, labor cost is greatly reduced for enterprises, a whole set of applicable production process flow and production solution are provided for the enterprises, the most core technology in the backlight source module is an optical technology of a light guide plate, two light guide plate forms such as printing and injection molding are mainly adopted, and other light guide plate forms such as injection molding and printing, laser dotting, corrosion and the like occupy a small proportion and are not suitable for batch production principle. The printing type has become the mainstream technology in the past for a long time because of its low cost, but the qualified product is not high and is the main disadvantage, and the LCD product requires a more precise light guide plate structure, and the injection molding type light guide plate is inevitably the mainstream of backlight development.

The existing backlight source has the defects that the light source is uniformly diffused by singly sticking a diffusion film on the upper surface of the light guide plate, the diffusion effect is poor, the uniformity of the light color of the backlight source is poor, and the PCB is lack of a heat dissipation structure, so that the backlight source is easy to damage due to overhigh temperature when being used uninterruptedly for a long time, and the requirements of users cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a LED backlight source with uniform light color.

In order to achieve the above purpose, the utility model adopts the following technical scheme: an LED backlight source with uniform light color comprises a light guide plate, a reflecting film and a PCB;

a PCB is clamped on one side wall of the light guide plate, a first shading strip is bonded on the outer surface wall of the light guide plate, and a reflecting film is bonded at the bottom of the light guide plate;

the light guide plate upper surface bonds and has lower diffusion barrier, diffusion barrier upper surface bonds and has the membrane of adding lustre to down, and adds lustre to membrane upper surface bonds and has last diffusion barrier, it has the light screen to go up diffusion barrier upper surface bonds, the edge bonding of light screen has the second shading strip.

Preferably, the PCB board is located on a lateral wall along length direction and inlays and be equipped with the LED lamp with the one side relative of light guide plate, the LED lamp is provided with a plurality of altogether, and a plurality of LED lamp is parallel to each other, and the interval between the two adjacent LED lamps equals.

Preferably, the bottom of the PCB is connected with pins, and the other side surface wall of the PCB along the length direction is embedded with a radiating pipe.

Preferably, the light guide plate has a rectangular structure.

Preferably, the number of the pins is two, and the two pins are symmetrical to each other about a vertical center line of the PCB.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses in, this photochromic even LED backlight, upper surface at the light guide plate is provided with two diffusion barrier, be diffusion barrier and lower diffusion barrier respectively, and be provided with the membrane of adding lustre to between last diffusion barrier and the lower diffusion barrier, such structural design, compare in traditional direct single diffusion barrier that sets up in the upper surface of light guide plate, the improvement of maximization photochromic homogeneity, its result of use of effectual improvement, and the cooperation is provided with the light screen on last diffusion barrier, the edge of light screen is provided with the second anti-dazzling screen, can shelter from the light source of edge department, prevent to be close to the darker light source of edge and spill, influence the result of use of this backlight.

2. The utility model discloses in, this photochromic even LED backlight inlays at the back of PCB board and is equipped with the cooling tube, at the in-process that uses, can pour into the air that flows into to the intraductal circulation of cooling tube for during the heat that PCB board work produced can distribute the air fast, improved the radiating efficiency of PCB board, guarantee the stability of its long-term uninterrupted duty time temperature, thereby its life of effectual improvement.

Drawings

Fig. 1 is a schematic structural view of an LED backlight source with uniform light color according to the present invention;

fig. 2 is a schematic structural diagram of a light shielding plate of an LED backlight source with uniform light color according to the present invention;

fig. 3 is a schematic structural diagram of a PCB board of an LED backlight source with uniform light color according to the present invention;

fig. 4 is a schematic cross-sectional structure view of a PCB board of an LED backlight source with uniform light color according to the present invention.

Illustration of the drawings:

1. a light guide plate; 2. a first shading strip; 3. a reflective film; 4. a PCB board; 5. a lower diffusion film; 6. a brightness enhancement film; 7. an upper diffusion film; 8. a visor; 9. a radiating pipe; 10. a second shading strip; 11. an LED lamp; 12. and (7) a pin.

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 work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment is as follows: referring to fig. 1-4, an LED backlight source with uniform light color includes a light guide plate 1, a reflective film 3 and a PCB 4;

a PCB 4 is clamped on one side wall of the light guide plate 1, a first shading strip 2 is bonded on the outer surface wall of the light guide plate 1, and a reflecting film 3 and a rectangular structure of the light guide plate 1 are bonded at the bottom of the light guide plate 1.

Example two: referring to fig. 1, a lower diffusion film 5 is bonded on the upper surface of a light guide plate 1, a bright enhancement film 6 is bonded on the upper surface of the lower diffusion film 5, an upper diffusion film 7 is bonded on the upper surface of the bright enhancement film 6, two diffusion films are arranged on the upper surface of the light guide plate 1, the upper diffusion film 7 and the lower diffusion film 5 are respectively arranged, and the bright enhancement film 6 is arranged between the upper diffusion film 7 and the lower diffusion film 5.

Example three: referring to fig. 1 and 2, the upper surface of the upper diffusion film 7 is bonded with a light shielding plate 8, the corners of the light shielding plate 8 are bonded with second shading strips 10, the corners of the light shielding plate 8 are provided with the second shading strips 10, so that the light source at the corners can be shielded, the light source close to the darker corners is prevented from leaking, and the use effect of the backlight source is influenced.

Example four: referring to fig. 1, 3 and 4, the PCB 4 is provided with a plurality of LED lamps 11 along a side wall of the length direction opposite to the light guide plate 1, the LED lamps 11 are parallel to each other, and the distance between two adjacent LED lamps 11 is equal. 4 bottoms of PCB board are connected with pin 12, PCB board 4 inlays on length direction's the opposite side table wall and is equipped with cooling tube 9, pin 12 is provided with two altogether, and two pins 12 are symmetrical about PCB board 4's vertical central line each other, it is equipped with cooling tube 9 to inlay at the back of PCB board 4, in the use, can pour into the air that flows to cooling tube 9 inner loop, make the heat that PCB board 4 work produced can give off the air fast, PCB board 4's radiating efficiency has been improved, guarantee its long-term incessant during operation stability of temperature, thereby effectual improvement its life.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. An LED backlight source with uniform light color is characterized by comprising a light guide plate (1), a reflecting film (3) and a PCB (printed circuit board) (4);

a PCB (printed circuit board) is clamped on one side wall of the light guide plate (1), a first shading strip (2) is bonded on the outer surface wall of the light guide plate (1), and a reflecting film (3) is bonded at the bottom of the light guide plate (1);

diffusion barrier (5) down have been adhered to light guide plate (1) upper surface, diffusion barrier (5) upper surface is adhered to bright enhancement membrane (6) down, and bright enhancement membrane (6) upper surface is adhered to have last diffusion barrier (7), it has light screen (8) to go up diffusion barrier (7) upper surface adhesion, the edge of light screen (8) bonds and has second shading strip (10).

2. The LED backlight source with uniform light color as claimed in claim 1, wherein a plurality of LED lamps (11) are embedded in a side wall of the PCB (4) along the length direction, the side wall is opposite to the light guide plate (1), the LED lamps (11) are arranged in a total number, the LED lamps (11) are parallel to each other, and the distance between two adjacent LED lamps (11) is equal.

3. The LED backlight source with uniform light color as claimed in claim 1, wherein the bottom of the PCB (4) is connected with pins (12), and a heat dissipation pipe (9) is embedded on the other side surface wall of the PCB (4) along the length direction.

4. The LED backlight source with uniform light color as claimed in claim 1, wherein the light guide plate (1) has a rectangular structure.

5. An LED backlight source with uniform light color as claimed in claim 3, characterized in that the pins (12) are provided in two, and the two pins (12) are symmetrical to each other about the vertical center line of the PCB (4).