A kind of side entrance back module and display device
This application involves display technology field, more particularly to a kind of side entrance back module and display device.
Backlight module is one of key part and component of display, and existing backlight module is divided into side entrance back module and straight
Type backlight module.LED is common back light, and the arrangement model of LED affects display effect and cost size.With
The progress of LED technology, the luminous efficiency of current list lamp is stepping up, if side entrance back module is still according to LED before
Arrangement model is designed, and the excessive cost of brightness surplus can be caused to waste.But it is simple to reduce LED numbers, increase lamp spacing meeting
Subjective lamp shadow problem is caused to aggravate, it is difficult to be adjusted and cover by light guide plate and diaphragm.Meanwhile side entrance back at present
The size of LED is less and less, the size of test to 1mm*0.7mm.The use of small size LED be ultra-narrow frame exploitation must
Right trend.But too small LED sizes, necessarily cause lamp spacing excessive, can also occur the lamp shadow of lamp bead shape in incident side.In order to gram
Above-mentioned phenomenon is taken, existing solution is that reflex block is set between LED to cause uniform light, improves the utilization of light
Rate, but cause the light being emitted after reflex block since the angle for the light for inciding reflex block is varied in this method
Line angle degree is also multidirectional, causes the light after reflection can not controllably enter gap section, in this way, LED space parts
The light divided still cannot get good compensation, and subjective lamp shadow problem still remains.
In addition in actual use, since LED caloric values are larger, light guide plate can expanded by heating, in order to prevent light guide plate with
LED, which is squeezed, to be touched, it is necessary to which a certain number of blocks of arranging in lamp bar, block are embedded between two LED, and thickness is slightly above LED.Block
Usually opaque material, such as iron block, meeting shield portions light, further influence subjective effect.
Furthermore side entering type LED core chip size progressively reduces at present, is proposed flip-chip.Since flip-chip is without anti-
The design of light cup can cancel two lateral retaining walls, and reach three faces and shine.Three face light extracting LEDs include the incidence surface of face light guide plate
First light-emitting area and by the first light-emitting area both ends face away from light guide incidence surface the second light-emitting area for being formed respectively of extension and
3rd light-emitting area, wherein in addition to the light that the first light-emitting area is sent is directly entered and is used effectively in light guide plate, second shines
The light that face and the 3rd light-emitting area are sent all cannot directly enter in light guide plate, cause the profit for the light that three face light extracting LEDs send
It is very low with rate, so as to be unfavorable for improving the light efficiency of backlight module.
The content of the invention
In view of above-mentioned the deficiencies in the prior art, it is an object of the invention to provide a kind of side entrance back module and display to fill
Put, improve LED light in backlight module and improve luminous energy away from the excessive lamp shadow problem brought, protection LED from light guide plate expansion effects
Efficiency, and then the purpose of high efficiency, low cost.
In order to achieve the above object, the present invention provides a kind of side entrance back module, including light guide plate and LED light bar,
The LED light bar includes the multiple LED light of circuit board and setting on circuit boards, wherein, between the two neighboring LED light
Guide-lighting block is provided with, the leaded light block includes an at least incidence surface and a light-emitting surface, and the incidence surface is adjacent with the LED light,
The incident side of the light-emitting surface and the light guide plate is oppositely arranged.LED light shines, and side light enters the guide-lighting block of both sides
In, after total reflection, the light of entrance is projected from the light-emitting surface of guide-lighting block, is entered in light guide plate, effect is such as LED light.This sets
In meter, guide-lighting block has been used, light has been limited and is projected from light-emitting surface, this is compared with the uncertain reflection direction of reflex block, a side
Face can be controllable compensation LED lamp gap section light, and then improve due to LED light spacing it is excessive, gap section light compared with
The lamp shadow problem brought less, the light that another aspect LED light side is sent are directed to the incident side of light guide plate, improve LED
The utilization rate for the light that lamp is sent, so that beneficial to the light efficiency for improving backlight module.
Further, the height of guide-lighting block is higher than the height of LED light.In this way, on the one hand guide-lighting block can receive more
Light, on the other hand, guide-lighting block play the role of block, the influence that protection LED light expands from light guide plate.
Further, in order to ensure the light conductivity of guide-lighting block, guide-lighting block is transparent material.Specifically, leading because of guide-lighting block
Light principle is identical with the guide-lighting principle of light guide plate used in backlight module, and the material of guide-lighting block may be selected from backlight module light guide plate
Material species.Preferably, the material of guide-lighting block is selected from PMMA, polyether sulfone and makrolon.
Further, the light-emitting surface of guide-lighting block is equipped with the light directing site for light extraction, and light directing site is preferably ink net
Point, it is ensured that the light for entering guide-lighting block is controllably projected from the light-emitting surface of guide-lighting block, into light guide plate.Light directing site can uniformly divide
Light-emitting surface is distributed in,, can also be non-homogeneous with the uniformity that this ensures to project light distribution preferably according to certain arrangement rule distribution
State exists, and can need to make a choice according to actual conditions.
Further, LED is single side or the LED of three face light extractions.Wherein, three face light extracting LEDs include entering for face light guide plate
First light-emitting area of smooth surface and the second hair formed respectively by the incidence surface extension of the both ends face away from light guide of the first light-emitting area
Smooth surface and the 3rd light-emitting area, both sides light-emitting angle are larger.The introducing of guide-lighting block, can significantly improve the light of three face light extracting LEDs
The problem of line use ratio is low and lamp shadow problem.
In addition, present invention also offers a kind of display device, including above-mentioned side entrance back module.
Compared with prior art, in side entrance back module provided by the invention, set in LED light bar between adjacent LED
Guide-lighting block is equipped with, guide-lighting block includes an at least incidence surface and a light-emitting surface, and incidence surface is adjacent with LED light, light-emitting surface and light guide plate
Incident side be oppositely arranged.Compared to the uncertain reflection direction of reflex block, the light that LED sides are sent enters guide-lighting block
Behind side, controllably projected from the light-emitting surface of guide-lighting block and enter the gap between two LED, the light of LED light gap section
Good compensation is obtained, is effectively improved since LED light is away from excessive, lamp shadow problem caused by gap section light is less,
Meanwhile the utilization of LED light side light, the utilization rate of LED transmitting light is improved, so that light efficiency is improved, furthermore, if
The height of the guide-lighting block of meter is higher than LED so that guide-lighting block plays the role of block, the shadow that protection LED light expands from light guide plate
Brief description of the drawings
Fig. 1 is the structure diagram of liquid crystal display device of the present invention；
Fig. 2 is the structure diagram of the LED light bar of the present invention；
Fig. 3 is the partial structural diagram of LED light bar；
Fig. 4 is the structure diagram of guide-lighting block.
It should be understood that the specific embodiments described herein are used only for explaining the present invention, it is not used to limit this hair
It is bright.
Fig. 1 is liquid crystal display device provided by the invention, and liquid crystal display device includes liquid crystal panel 1 and side entrance back mould
Group 2, liquid crystal panel 1 and the light-emitting surface of side entrance back module 2 are oppositely arranged, and side entrance back module 2 includes LED light bar 21,
Reflector plate 22, light guide plate 23, optical diaphragm 24 and glue frame 25, reflector plate 22 are located at the lower section of light guide plate 23, optical diaphragm 24
In the light-emitting surface of light guide plate 23, optical diaphragm 24 and liquid crystal panel 1 are mutually opposing.LED light bar 21 is fixed in glue frame 25, is located at
The incident side of light guide plate 23.
It should be noted that in addition to the structure shown in Fig. 1, backboard etc. can also be included, on the embodiment of the present invention
LCD device backlight module other compositions, those skilled in the art can refer to disclosed liquid crystal display in the prior art
The concrete structure of device backlight module, the present invention do not limit this.Meanwhile in Fig. 1, LED light bar is fixed in glue frame, except this
Outside, according to the technological know-how of this area, LED light bar also may be selected to be fixed on backboard.
Fig. 2 is the structure diagram of LED light bar in Fig. 1, as shown in Fig. 2, LED light bar provided by the invention 21 includes circuit
Plate 100 and multiple LED light 200 on circuit boards are spaced, guide-lighting block 300 is provided between adjacent LED light 200.
Alternatively, the concrete form of guide-lighting block 300 can be the forms such as pane, square block, trapezoid block, cylindrical piece, but not
It is limited to above-mentioned form.
Fig. 3 is the partial schematic diagram of LED light bar in Fig. 2, from figure 3, it can be seen that guide-lighting block 300 is overall in block knot
Structure, guide-lighting block 300 include side and upper surface, and wherein side is the incidence surface of guide-lighting block, and upper surface is light-emitting surface.With reference to Fig. 3
Shown, LED light 200 shines, and the light that 200 side of LED light is sent enters the incidence surface of the guide-lighting block 300 of adjacent both sides, warp
After crossing total reflection, projected from the upper surface of guide-lighting block 300.Set compared between adjacent LED lamp for the technical solution of reflex block,
Because guide-lighting block 300 projects light the limitation in direction so that more light are controllably irradiated to the gap portion between LED light,
The light of LED light gap section obtains good compensation so that lamp shadow problem is into one because caused by gap section light is less
Step is improved.Meanwhile the utilization of LED light side light, improve the utilization rate that LED launches light.
In order to ensure the light conductivity of guide-lighting block, guide-lighting block is transparent material.Specifically, because of the guide-lighting principle and the back of the body of guide-lighting block
The guide-lighting principle of light guide plate used is identical in optical mode group, and the material of guide-lighting block may be selected from the material kind of backlight module light guide plate
Class.Preferably, the material of guide-lighting block is selected from PMMA, polyether sulfone and makrolon.
With reference to Fig. 4, the upper surface of guide-lighting block 300 of the invention is by setting light directing site 301 to realize light extraction.Guide-lighting net
Point is perfectly even distributed in upper surface, more preferably according to certain arrangement rule distribution, ensures to project the uniform of light distribution with this
Property, but not limited to this, it can also use heterogeneous state to be distributed, the shape and distribution form of site can refer to disclosed in the prior art
Structure, reasonable selection can be also made according to actual needs.Light directing site 301 is commonly used in the art in embodiments of the present invention
LED light 200 in the present invention can be single side light extraction, three face light extracting LED lamps.Preferably using three face light emitting LED lamps.
First light-emitting area of the incidence surface of three face light extracting LED lamps including face light guide plate and by the first light-emitting area both ends backwards to guide-lighting
The second light-emitting area and the 3rd light-emitting area that the incidence surface extension of plate is formed respectively, wherein except the light that the first light-emitting area is sent is direct
Outside being used effectively in into light guide plate, the light that the second light-emitting area and the 3rd light-emitting area are sent all cannot directly enter leaded light
In plate, cause the utilization rate for the light that three face light extracting LEDs send very low.When setting guide-lighting block between three face light extracting LEDs,
The light that LED both sides are projected is injected into light guide plate after the direction transformation of guide-lighting block, so that three face light extracting LED both sides go out
The light penetrated is utilized well, substantially increases light efficiency, i.e., for three face light extracting LEDs, the introducing of guide-lighting block,
Drastically increase the efficiency of light energy utilization.
With continued reference to shown in Fig. 3, the height of guide-lighting block 300 is higher than LED light 200.In the backlight module course of work, LED
Lamp emits light and heat, and causes to close on light guide plate expanded by heating, in order to avoid the light guide plate after expansion and LED light squeeze touch produce it is unfavorable after
Fruit, guide-lighting block 300 play the role of block, avoid contact of the light guide plate with both LED light.Guide-lighting block 300 is slightly above LED
Can, it is not especially limited, can refer to the height of existing block, meets to be actually needed.In addition to block acts on, guide-lighting block 300
Higher than LED light, it may be such that guide-lighting block receives the more light from LED light, including the light of LED light side outgoing and front
The light of outgoing, is better achieved to the dispersed of light and utilizes.
It the above is only the embodiment of the present invention, it is noted that come for those skilled in the art
Say, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should be regarded as
Protection scope of the present invention.