CN103162185A - Edge-lit type light-emitting diode (LED) backlight module and television - Google Patents

Abstract

The invention discloses an edge-lit type light-emitting diode (LED) backlight module and a television and achieves a technical effect that a liquid crystal display panel is more uniform in display luminance. The edge-lit type LED backlight module comprises a back plate, a light guiding plate, N sets of LED light sources and a liquid crystal display panel. The light guiding plate is arranged on the surface of the back plate and N corner portions of four corner portions of the light guiding plate are wedge-shaped. An i set of LED light sources and an i corner portion of the N corner portions are correspondingly arranged, and i is an arbitrary integer from 1 to N. Incident lights which are produced by the i set of LED light sources enter into the light guiding plate from the i corner. The liquid crystal display panel is arranged on the surface of the light guiding plate. The i set of LED light sources of the N sets of LED light sources comprises a first set of LED light sources and a second set of LED light sources which is connected with the first set of the LED light sources. A first incline angle is located between the first set of LED light sources and a first lateral edge of the light guiding plate. A second incline angle is located between the second set of LED light sources and the first lateral edge of the light guiding plate.

Description

A kind of side light type LED back light module and television set

Technical field

The present invention relates to the Display Technique field, particularly a kind of side light type LED back light module and television set.

Background technology

Development along with electronic technology, produced increasing electronic equipment, wherein, a lot of electronic equipments all have LCDs, and generally, LCDs comprises liquid crystal panel and backlight module, described liquid crystal panel is comprised of layer glass backboard therebetween one liquid crystal layer, wherein, because liquid crystal panel itself is not luminous, so need to provide uniform light-source system for it by backlight module.

In the prior art, can provide light-source system to liquid crystal panel by down straight aphototropism mode set or side entrance back module, in this case, please refer to Fig. 1, the side entrance back module comprises following structure:

Backboard 101;

LGP 102 is arranged at describedbackboard 101 surfaces;

Liquid crystal panel 103 is arranged at described LGP 102 surfaces;

LED lamp bar 104 is arranged at least one side of described LGP 102, and wherein on each LED lamp bar, layout has a plurality of LED light sources;

Wherein, by the leaded light effect of described LGP 102, the incident light that a plurality of LED light sources of institute's layout on describedLED lamp bar 104 can be produced is distributed in described liquid crystal panel.

And along with the raising of LED power, on LED lamp bar, the quantity of set LED light source is fewer and feweri, even only need to get final product at the region division LED light source relative with four bights of LGP, in this case, produced the side light type LED back light module of angle light inlet, please refer to Fig. 2, the side light type LED back light module of described angle light inlet comprises following structure:

Backboard 201;

LGP 202 is arranged at describedbackboard 201 surfaces, andN bight 202a in four bights of described LGP 202 is wedge shape;

Liquid crystal panel 203 is arranged at described LGP 202 surfaces.

N organizesLED light source 204, relatively is arranged at describedbackboard 201 surfaces with describedN bight 202a, and is the first angle of inclination between thefirst side 202b of the arbitrary group ofLED light source 203 in described N groupLED light source 203 and described LGP 202.

The present application people finds to exist in prior art following technical problem at least in the process that realizes the embodiment of the present application technical scheme:

Due in the prior art, in the side light type LED back light module of angle light inlet, the light of incident light mainly is distributed in the zone line of LGP, the light portion of angular regions is less, and then the zone line that causes liquid crystal panel is brighter, folding corner region is darker, so cause existing in prior art the inhomogeneous technical problem of display brightness of liquid crystal panel;

For example: as shown in Figure 3, be the schematic diagram of one jiao of incident type LED-backlit module, the comprising of described angle incident type LED-backlit module:backboard 30;LGP 31 is arranged at describedbackboard 30 surfaces; The bottom left on the LGP surface of first group ofLED light source 32 and described LGP 31 is oppositely arranged; The bottom left on the LGP surface of second group ofLED light source 33 and described LGP 31 is oppositely arranged;Liquid crystal panel 34;

Wherein, the incident light that produces by described first group ofLED light source 32 and described second group ofLED light source 33 is after being incident to describedliquid crystal panel 34, mainly be distributed in describedliquid crystal panel 34zone line 34a, can there be the dark space incorner areas 34b, 34c, 34d.

Summary of the invention

The embodiment of the present invention provides a kind of side light type LED back light module and television set, is used for solving the inhomogeneous technical problem of display brightness of prior art liquid crystal panel.

On the one hand, the application provides following technical scheme by an embodiment:

A kind of side light type LED back light module comprises: backboard; LGP is arranged at the back plate surface of described backboard, and in four bights of described LGP, N bight is wedge shape, and wherein, N is arbitrary integer of 1 to 4; N organizes LED light source, the corresponding setting in i bight in the i group LED light source in described N group LED light source and a described N bight, and i is 1 to N arbitrary integer; Wherein, described i group incident light that LED light source produces is incident to described LGP from described i bight; Liquid crystal panel, be arranged at the LGP surface of described LGP, i group LED light source in described N group LED light source comprises first group of LED sub-light source and at least two group LED sub-light sources of second group of LED sub-light source joining with described first group of LED sub-light source, be the first angle of inclination between the first side of described first group of LED sub-light source and described LGP, be second angle of inclination different with described the first angle of inclination between described second group of LED sub-light source and described first side.

Optionally, the difference at described the second angle of inclination and described the first angle of inclination is greater than the first predetermined angle.

Optionally, described N group LED light source specifically comprises:

First group of LED light source is oppositely arranged with the left comer that is positioned at bottom, described LGP surface in a described N bight, with the distance at the top on described LGP surface be the first distance;

Second group of LED light source is oppositely arranged with the right corner that is positioned at bottom, described LGP surface in a described N bight, with the distance at the top on described LGP surface be second distance;

Wherein, the distance at described liquid crystal panel bottom and the top on described LGP surface is less than the first distance threshold, and described the first distance and described second distance are all greater than described the first distance threshold.

Optionally, described side light type LED back light module also comprises: the 3rd group of LED light source is oppositely arranged with the bottom on described LGP surface.

Optionally, described the first angle of inclination is specially: 28 degree ~ 32 degree.

Optionally, described side light type LED back light module also comprises:

The mirror-reflection bar is oppositely arranged with the top on described LGP surface.

Optionally, described the first angle of inclination is specially: 43 degree ~ 47 degree.

Optionally, described LGP specifically comprises: incidence surface, exiting surface and printing surface, wherein, the printing surface surface distributed of described printing surface has at least one site, and described at least one site is directly proportional in the incident distance of the incident light that the distribution density on described LGP surface and described N group LED light source produce.

Optionally, described printing surface comprises:

Be positioned at the first area of described printing surface top left side;

Be positioned at the second area of described printing surface top right side; And

Be positioned at the 3rd middle zone of described printing surface bottom, wherein, the described distribution density in described first area, described second area and described the 3rd zone is greater than the described distribution density in other zone of described printing surface.

On the other hand, the application provides following technical scheme by another embodiment:

A kind of television set comprises:

Casing;

Processor is arranged in described casing;

Display unit is arranged on described casing, is connected with described processor, and wherein, described display unit comprises: the side light type LED back light module that the arbitrary embodiment of the application introduces.

The one or more technical schemes that provide in the embodiment of the present application have following technique effect or advantage at least:

due in the embodiment of the present application, enter in the side light type LED back light module of formula at the angle, adopted the light inlet mode of multi-angle, namely each the group LED light source in the N of described side light type LED back light module group LED light source all comprises at least two group LED sub-light sources of first group of LED sub-light source and second group of LED sub-light source, wherein, the main distributed areas of its light of LED sub-light source of different light inlet angles are also different, so, when the light source of first group of LED produces the first incident light and is incident to LGP and then makes the distribution of light of LGP inhomogeneous, can play the effect of light filling to LGP by second group of LED sub-light source, thereby can make the distribution of light of LGP even, so reached the uniform technique effect of the display brightness of liquid crystal panel.

Description of drawings

Fig. 1 is the structure chart of side light type LED back light module in prior art;

Fig. 2 is the structure chart of the side light type LED back light module of angle light inlet in prior art;

Fig. 3 is when in prior art, the two bottom sides on the LGP surface of angle injection type backlight module arranges LED light source, cause liquid crystal panel the schematic diagram of dark space to occur;

Fig. 4 is the structure chart of side light type LED back light module in the embodiment of the present application one;

Fig. 5 is the schematic diagram at the first angle of inclination and second angle of inclination of side light type LED back light module in the embodiment of the present application one;

Fig. 6 is the schematic diagram that comprises the i group LED light source of three groups of LED sub-light sources in the embodiment of the present application one;

Fig. 7 be in the embodiment of the present application one with the two jiaos of corresponding schematic diagrames that are provided with the side light type LED back light module of LED light source in LGP bottom;

Fig. 8 is the network point distribution schematic diagram of printing surface in the embodiment of the present application one side light type LED back light module;

Fig. 9 is the side light type LED back light module schematic diagram that comprises the 3rd group of LED light source in the embodiment of the present application one;

Figure 10 is the schematic diagram that comprises the side light type LED back light module of mirror-reflection bar in the embodiment of the present application one;

Figure 11 is the structure chart of television set in the embodiment of the present application two.

The specific embodiment

The embodiment of the present invention provides a kind of side light type LED back light module and television set, is used for solving the inhomogeneous technical problem of display brightness of prior art liquid crystal panel.

Technical scheme in the embodiment of the present application is for solving above-mentioned technical problem, and general thought is as follows:

A kind of side light type LED back light module is provided, comprises: backboard; LGP is arranged at the back plate surface of described backboard, and in four bights of described LGP, N bight is wedge shape, and wherein, N is arbitrary integer of 1 to 4; N organizes LED light source, the corresponding setting of i angle in the i group LED light source in described N group LED light source and a described N bight, and i is 1 to N arbitrary integer; Wherein, described i group incident light that LED light source produces is incident to described LGP from described i bight; Liquid crystal panel, the LGP that is arranged at described LGP is surperficial; I group LED light source in described N group LED light source comprises first group of LED sub-light source and at least two group LED sub-light sources of second group of LED sub-light source joining with described first group of LED sub-light source, be the first angle of inclination between the first side of described first group of LED sub-light source and described LGP, be second angle of inclination different with described the first angle of inclination between described second group of LED sub-light source and described first side.

when making the side light type LED back light module due to the employing such scheme, adopted the light inlet mode of multi-angle, namely each the group LED light source in the N of described side light type LED back light module group LED light source all comprises at least two group LED sub-light sources of first group of LED sub-light source and second group of LED sub-light source, wherein, the main distributed areas of its light of LED sub-light source of different light inlet angles are also different, so, when the light source of first group of LED produces the first incident light and is incident to LGP and then makes the distribution of light of LGP inhomogeneous, can play the effect of light filling to LGP by second group of LED sub-light source, thereby can make the distribution of light of LGP even, so reached the uniform technique effect of the display brightness of liquid crystal panel.

In order better to understand technique scheme, below in conjunction with Figure of description and concrete embodiment, technique scheme is described in detail.

Embodiment one

The embodiment of the present application one provides a kind of side light type LED back light module, please refer to Fig. 4 and Fig. 5, and described side light type LED back light module specifically comprises:

Backboard 41;

LGP 42 is arranged at the back plate surface of describedbackboard 41, and in four bights of describedLGP 42,N bight 42a is wedge shape, and wherein, N is arbitrary integer of 1 to 4;

N organizes LEDlight source 43, the corresponding setting in i bight in the i group LED light source in described N group LEDlight source 43 and describedN bight 42a, and i is 1 to N arbitrary integer; Wherein, described i group incident light that LED light source produces is incident to describedLGP 42 from described i bight; I group LED light source in described N group LEDlight source 43 comprises first group of LEDsub-light source 51 and at least two group LED sub-light sources of second group of LEDsub-light source 52 joining with described first group of LEDsub-light source 51, thefirst side 42b(of described first group of LEDsub-light source 51 and describedLGP 42 take described first side as the base of describedLGP 42 as example, can certainly be other limits) between be the first angle ofinclination 51a, be the second angle ofinclination 52a different with described the first angle ofinclination 51a between described second group of LEDsub-light source 52 and describedfirst side 42b;

Liquid crystal panel 44, the LGP that is arranged at describedLGP 43 is surperficial.

In one embodiment, please continue with reference to figure 5, described i group LED light source only comprises described first group of LEDsub-light source 51 and described second group of LEDsub-light source 52; In another embodiment, described i group LED light source comprises other LED sub-light source except described first group of LEDsub-light source 51 and described second group of LEDsub-light source 52, please refer to Fig. 6, and described i group LED light source comprises: first group of LEDsub-light source 51; Second group of LEDsub-light source 52, described second group of LEDsub-light source 52 joins with described first group of LEDsub-light source 51; The 3rd group of LEDsub-light source 53, described the 3rd group of LEDsub-light source 53 joins with described second group of LEDsub-light source 52, wherein, be different the 3rd angle ofinclination 53a all with the first angle ofinclination 51a and the second angle ofinclination 52a between described the 3rd group of LEDsub-light source 53 and described second group of LEDsub-light source 52.

In specific implementation process, described the first angle ofinclination 51a can be arbitrary value, such as: 30 °, 45 °, 60 ° etc.; Described the second angle ofinclination 52a also can be arbitrary value, such as: such as: 45 °, 60 °, 70 ° etc., this embodiment of the present application is not restricted.

For guaranteeing that described first group of LEDsub-light source 51 is distributed in different zones from the incident light that described second group of LEDsub-light source 52 produces, as a preferred embodiment, the difference at described the second angle of inclination and described the first angle of inclination is greater than the first predetermined angle, described the first predetermined angle is for example: 10 degree, 12 degree etc., such as: described the second inclination angles 52a is that 45 °, described the first angle ofinclination 51a are 30 degree; Described the second inclination angles 52a is that 60 °, described the first angle ofinclination 51a are 45 ° etc., this embodiment of the present application is no longer itemized, and be not restricted.

In specific implementation process, describedLGP 42 can comprise 1 ~ 4 bight, and then described side light type LED back light module also can corresponding described 1 ~ 4 bight arranges the LED light source of 1 ~ 4 group of varying number, at described N less than 4 o'clock, described N group LED light source can be corresponding with any bight of describedLGP 42, in one embodiment, and as shown in Figure 7, described N group LED light source specifically comprises:

First group of LEDlight source 43a is oppositely arranged with the left comer 42a1 that is positioned at bottom, described LGP surface 42c in describedN bight 42a, with the distance of the top 42d on described LGP surface be the first distance 71;

Second group ofLED light source 43b is oppositely arranged with the right corner 42a2 that is positioned at bottom, described LGP surface 42c in describedN bight 42a, with the distance at the top on described LGP surface be second distance 72;

Wherein, the distance 73 of the top 42d on describedliquid crystal panel 44 bottom 44a and described LGP surface is less than the first distance threshold, and described the first distance 71 and described second distance 72 are all greater than described the first distance threshold.

wherein, in the specific embodiment process, described the first distance threshold is generally width and the described LGP top width sum of described liquid crystal panel, but be not definitely to be defined as this value, can float about this value, wherein, as seen from Figure 7, described first the distance 71 and described second distance 72 greater than described the first distance threshold, and the distance 73 of the top 42d on describedliquid crystal panel 44 bottom 44a and described LGP surface is during less than the first distance threshold, described first group of LEDlight source 43a and described second group ofLED light source 43b are not directly towards described LGP light inlet, so having guaranteed has diffusion when incident light is incident to LGP, thereby prevented that speck from appearring in the LGP surface.

And, in this case, can be only bottom 42c on the LGP surface of described side light type LED back light module many group LED light sources are set, and then only need to increase the bottom width of side light type LED back light module, namely only need to increase the width of the bottom frame of LCDs, and do not increase the width of the All Border of LCDs, so more attractive in appearance.

as seen from the above description, due in the embodiment of the present application, specifically comprise at described N group LED light source: first group of LED light source, be oppositely arranged with the left comer that is positioned at bottom, described LGP surface in a described N bight, second group of LED light source, when being oppositely arranged with the right corner that is positioned at bottom, described LGP surface in a described N bight, the bottom lower than described liquid crystal panel with described first group of LED light source and described second group of LED light source setting, so, described first group of LED light source and described second group of LED light source are not direct light inlet, and then the incident light of generation can be spread fully, thereby further reached the uniform technique effect of liquid crystal panel surface display brightness.

In specific implementation process, describedLGP 42 generally includes following structure: incidence surface, exiting surface and printing surface, generally, the zone that distance L ED light source is far away, its light that incides is darker, so for the distribution of light that makesliquid crystal panel 44 is even, can give at least one site of printing surface surface distributed of described printing surface, the incident of the incident light that described at least one site produces at the distribution density on described LGP surface and described N group LED light source is apart from being directly proportional.

Specifically, namely incident light to enter the luminous point network point distribution rare, and increase gradually along the distribution density of the site of the direction of incident, wherein, increase the dot density of printing surface, can play to the zone of its correspondence the effect of light filling, to prevent the deficiency of light.

As seen from the above description, due in the embodiment of the present application, the printing surface of LGP corresponding a plurality of sites, wherein, the distribution density of site on printing surface is directly proportional to the incident distance of incident light, wherein, dot density is higher, and the light filling effect is better, and the incident light distance is far away, its light is darker, so increase dot density by the increase of incident distance, has reached the more uniform technique effect of display brightness of described liquid crystal panel.

Wherein, described side light type LED back light module comprise as shown in Figure 7 first group of LEDlight source 43a and during second group ofLED light source 43b, please refer to Fig. 8, described printing surface specifically comprises:

Be positioned at thefirst area 81 of described printing surface top left side;

Be positioned at thesecond area 82 of described printing surface top right side; And

Be positioned at the 3rdmiddle zone 83 of described printing surface bottom, wherein, the described distribution density in describedfirst area 81, describedsecond area 82 and described the3rd zone 83 is greater than the described distribution density in other zone of described printing surface.

Wherein, described LGP 22 comprise as shown in Figure 7 first group of LEDlight source 43a and during second group ofLED light source 43b, in thefirst area 81 of printing surface top left side, being positioned at thesecond area 82 of printing surface top right side and being positioned at the3rd zone 83 its light that receive of printing surface crown center can be darker, in order to play a light filling effect, dot density corresponding to printingsurface 83 these zones can be increased.Certainly, in specific implementation process, also can be based on concrete applied environment, the dot density of the zones of different of printing surface is increased, playing a light filling effect, thereby make the distribution of light ofliquid crystal panel 44 more even, higher for the distribution density of the site in which kind of zone of described printing surface, distribution density which kind of regional site is lower, the embodiment of the present application no longer itemizes, and is not restricted.

As seen from the above description, due in the embodiment of the present application, with LGP top left side zone, top right side is regional and the dot density setting of the zone line of LGP bottom is higher, and when described side light type LED back light module is provided with described first group of LED light source and described second group of LED light source, these zonal rays can be not enough, so after increasing dot density, further reached the more uniform technique effect of display brightness of described liquid crystal panel.

In specific implementation process, please refer to Fig. 9, described side light type LED back light module also comprises: the 3rd group of LED light source 91 is oppositely arranged with the bottom 42d on described LGP surface.

In specific implementation process, iff the 42c both sides, bottom with described LGP surface, LED light source is set, might can there be the dark space atliquid crystal panel 44, such as: the zone line of describedliquid crystal panel 44, in this case, can be in the zone relative and corresponding with described dark space with describedLGP 42bottom 43b, the 3rd group of LED light source 91 is set, carry out light filling can for described dark space by described the 3rd group of LED light source 91, and then make the distribution of light of describedliquid crystal panel 44 more even.In addition, in specific implementation process, can be based on the position of dark space, the difference of area size, to it, LED light source of varying number or different capacity is set, and the setting position of LED light source also is not limited to corresponding with describedLGP 42 bottom 42c, to have reached best light filling effect, make the distribution of light of describedliquid crystal panel 44 more even.

In specific implementation process, no matter which kind of angle described the first angle ofinclination 51a and described the second angle ofinclination 52a are, can play by the dark space of 91 pairs of describedliquid crystal panels 44 of described the 3rd group of LED light source the effect of light filling.Wherein, as a preferred embodiment, described the first angle of inclination is specially: 28 degree ~ 32 degree.When described the first angle of inclination at 28 degree ~ 32 degree during scope, can be by be oppositely arranged the mode of the 3rd group ofLED light source 101 in the bottom with described LGP surface, describedliquid crystal panel 44 is reached better light filling effect, and then can make distribution of light more even on describedliquid crystal panel 44 surfaces.In addition, in specific implementation process, can be based on the position of dark space, the difference of area size, to it, LED light source of varying number or different capacity is set, and the setting position of LED light source also is not limited to corresponding with the bottom 42c on described LGP surface, to have reached best light filling effect, make the distribution of light of describedliquid crystal panel 44 more even.

As seen from the above description, due in the embodiment of the present application, adopted the technical scheme that the 3rd group of LED light source is set in described side-light type LED light source, wherein, the bottom on described the 3rd group of LED light source and described LGP surface is oppositely arranged, so light filling is carried out in the dark space of the described liquid crystal panel that can cause described first group of LED light source and described second group of LED light source, and then the display brightness that has further reached liquid crystal panel technique effect more uniformly.

In specific implementation process, please refer to Figure 10, described side light type LED back light module also comprises: mirror-reflection bar 101 is oppositely arranged with the top 42d on described LGP surface.Wherein, after incident light is emitted to described mirror-reflection bar 101, can reflect by the mode of mirror-reflection described incident light to describedliquid crystal panel 44.

Generally, in the prior art, meeting is oppositely arranged a reflection bar with the top 42d on described LGP surface, wherein, when incident light is incident to described reflection bar, can reflex to describedliquid crystal panel 44 by irreflexive mode, to reach the effect of light filling, but adopt irreflexive mode to carry out reflex time to light, can too disperse because of the light that is reflected, thereby can not carry out light filling for the dark space, so can be by the mode of mirror-reflection, with penetrating light and reflex to the dark space of describedliquid crystal panel 44, to reach better light filling effect.In specific implementation process, described mirror-reflection bar 101 is for example: silver slurry minute surface emission bar, and certainly, in specific implementation process, described mirror-reflection bar 101 by which kind of material is made, and the embodiment of the present application is not restricted.

In specific implementation process, no matter which kind of angle described the first angle ofinclination 51a and described the second angle ofinclination 52a are, can play by the dark space of 101 pairs of describedliquid crystal panels 44 of described mirror-reflection bar the effect of light filling.As a preferred embodiment, described the first angle of inclination is specially: 43 degree ~ 47 degree.When described the first angle of inclination at 43 degree during ~ 47 degree degree scope, can be oppositely arranged by the top 42d with described LGP surface the mode of mirror-reflection bar 101, describedliquid crystal panel 44 is reached better light filling effect, and then can make distribution of light more even on describedliquid crystal panel 44 surfaces.In specific implementation process, described mirror-reflection bar 101 is for example: silver slurry minute surface emission bar, and certainly, in specific implementation process, described mirror-reflection bar 101 by which kind of material is made, and the embodiment of the present application is not restricted.

As seen from the above description, due in the embodiment of the present application, at the region division relative with top, LGP surface, the mirror-reflection bar is arranged, reflex to the dark space of liquid crystal panel by the mode of mirror-reflection so will be incident to the incident light of described mirror-reflection bar, wherein, compared to diffuse reflection mode used in the prior art, its reflecting effect is better due to the mode of mirror-reflection, so the display brightness that has further reached liquid crystal panel technique effect more uniformly.

In addition, in specific implementation process, can only adopt above-mentioned a kind of mode to carry out light filling to describedliquid crystal panel 44, also can adopt the combination of above-mentioned various ways to carry out light filling to describedliquid crystal panel 44, such as: when the 3rd group of LED light source 91 is set, mirror-reflection bar 101 is set, to this, the embodiment of the present application no longer itemizes, and is not restricted.

Embodiment two

Based on same inventive concept, the embodiment of the present application two provides a kind of television set, please refer to Figure 11, and described television set specifically comprises following structure:

Casing 111;

Processor 112 is arranged in describedcasing 111;

Display unit 113 is arranged on describedcasing 111, is connected with describedprocessor 112, and wherein, describeddisplay unit 113 comprises arbitrary side light type LED backlight module 113a that the embodiment of the present application one is introduced.

The television set of introducing due to the embodiment of the present application two, for adopting the television set of the side light type LED back light module manufacturing that the embodiment of the present application one introduces, so based on the side light type LED back light module of introducing in the embodiment of the present application one, those skilled in the art can understand concrete structure and the modification of the television set in the present embodiment two, so introduce no longer in detail for this television set at this.As long as those skilled in the art adopt the television set of the side light type LED back light module manufacturing that the embodiment of the present application one introduces, all belong to the scope of the application institute wish protection.

One or more technical schemes that the application provides have following technique effect or advantage at least:

(1) due in the embodiment of the present application, enter in the side light type LED back light module of formula at the angle, adopted the light inlet mode of multi-angle, namely each the group LED light source in the N of described side light type LED back light module group LED light source all comprises at least two group LED sub-light sources of first group of LED sub-light source and second group of LED sub-light source, wherein, the main distributed areas of its light of LED sub-light source of different light inlet angles are also different, so, when the light source of first group of LED produces the first incident light and is incident to LGP and then makes the distribution of light of LGP inhomogeneous, can play the effect of light filling to LGP by second group of LED sub-light source, thereby can make the distribution of light of LGP even, so reached the uniform technique effect of the display brightness of liquid crystal panel.

(2) due in the embodiment of the present application, specifically comprise at described N group LED light source: first group of LED light source, be oppositely arranged with the left comer that is positioned at bottom, described LGP surface in a described N bight, second group of LED light source, when being oppositely arranged with the right corner that is positioned at bottom, described LGP surface in a described N bight, the bottom lower than described liquid crystal panel with described first group of LED light source and described second group of LED light source setting, so, described first group of LED light source and described second group of LED light source are not direct light inlet, and then the incident light of generation can be spread fully, thereby further reached the uniform technique effect of liquid crystal panel surface display brightness.

(3) due in the embodiment of the present application, adopted the technical scheme that the 3rd group of LED light source is set in described side-light type LED light source, wherein, the bottom on described the 3rd group of LED light source and described LGP surface is oppositely arranged, so light filling is carried out in the dark space of the described liquid crystal panel that can cause described first group of LED light source and described second group of LED light source, and then the display brightness that has further reached liquid crystal panel technique effect more uniformly.

(4) due in the embodiment of the present application, at the region division relative with top, LGP surface, the mirror-reflection bar is arranged, reflex to the dark space of liquid crystal panel by the mode of mirror-reflection so will be incident to the incident light of described mirror-reflection bar, wherein, due to the mode of mirror-reflection compared to diffuse reflection mode used in the prior art, its reflecting effect is better, so further reached the more uniform technique effect of the display brightness of liquid crystal panel.

(5) due in the embodiment of the present application, the corresponding a plurality of sites of the printing surface of LGP, wherein, the distribution density of site on printing surface is directly proportional to the incident distance of incident light, wherein, dot density is higher, the light filling effect is better, and the incident light distance is far away, and its light is darker, so the increase by the incident distance increases dot density, reached the more uniform technique effect of display brightness of described liquid crystal panel.

(6) due in the embodiment of the present application, with LGP top left side zone, top right side is regional and the dot density setting of the zone line of LGP bottom is higher, and when described side light type LED back light module is provided with described first group of LED light source and described second group of LED light source, these zonal rays can be not enough, so after increasing dot density, further reached the more uniform technique effect of display brightness of described liquid crystal panel.

Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.

Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of claim of the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.

Claims (10)

1. a side light type LED back light module, comprising: backboard; LGP is arranged at the back plate surface of described backboard, and in four bights of described LGP, N bight is wedge shape, and wherein, N is arbitrary integer of 1 to 4; N organizes LED light source, the corresponding setting in i bight in the i group LED light source in described N group LED light source and a described N bight, and i is 1 to N arbitrary integer; Wherein, described i group incident light that LED light source produces is incident to described LGP from described i bight; Liquid crystal panel, the LGP that is arranged at described LGP is surperficial, it is characterized in that:

I group LED light source in described N group LED light source comprises first group of LED sub-light source and at least two group LED sub-light sources of second group of LED sub-light source joining with described first group of LED sub-light source, be the first angle of inclination between the first side of described first group of LED sub-light source and described LGP, be second angle of inclination different with described the first angle of inclination between described second group of LED sub-light source and described first side.

2. side light type LED back light module as claimed in claim 1, is characterized in that, the difference at described the second angle of inclination and described the first angle of inclination is greater than the first predetermined angle.

3. side light type LED back light module as claimed in claim 1, is characterized in that, described N group LED light source specifically comprises:

First group of LED light source is oppositely arranged with the left comer that is positioned at bottom, described LGP surface in a described N bight, with the distance at the top on described LGP surface be the first distance;

Second group of LED light source is oppositely arranged with the right corner that is positioned at bottom, described LGP surface in a described N bight, with the distance at the top on described LGP surface be second distance;

Wherein, the distance at described liquid crystal panel bottom and the top on described LGP surface is less than the first distance threshold, and described the first distance and described second distance are all greater than described the first distance threshold.

4. side light type LED back light module as claimed in claim 3, is characterized in that, described side light type LED back light module also comprises: the 3rd group of LED light source is oppositely arranged with the bottom on described LGP surface.

5. side light type LED back light module as claimed in claim 4, is characterized in that, described the first angle of inclination is specially: 28 degree ~ 32 degree.

6. side side light type LED back light module as claimed in claim 3, is characterized in that, described side light type LED back light module also comprises:

The mirror-reflection bar is oppositely arranged with the top on described LGP surface.

7. side light type LED back light module as claimed in claim 6, is characterized in that, described the first angle of inclination is specially: 43 degree ~ 47 degree.

8. side light type LED back light module as claimed in claim 3, it is characterized in that, described LGP specifically comprises: incidence surface, exiting surface and printing surface, wherein, the printing surface surface distributed of described printing surface has at least one site, and described at least one site is directly proportional in the incident distance of the incident light that the distribution density on described LGP surface and described N group LED light source produce.

9. side light type LED back light module as claimed in claim 8, is characterized in that, described printing surface comprises:

Be positioned at the first area of described printing surface top left side;

Be positioned at the second area of described printing surface top right side; And

Be positioned at the 3rd middle zone of described printing surface bottom, wherein, the described distribution density in described first area, described second area and described the 3rd zone is greater than the described distribution density in other zone of described printing surface.

10. a television set, is characterized in that, comprising:

Casing;

Processor is arranged in described casing;

Display unit is arranged on described casing, is connected with described processor, and wherein, described display unit comprises: the described side light type LED back light module of claim as arbitrary in claim 1-9.

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