CN103162185B - Edge-lit type light-emitting diode (LED) backlight module and television - Google Patents
Edge-lit type light-emitting diode (LED) backlight module and television Download PDFInfo
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- CN103162185B CN103162185B CN201310057157.3A CN201310057157A CN103162185B CN 103162185 B CN103162185 B CN 103162185B CN 201310057157 A CN201310057157 A CN 201310057157A CN 103162185 B CN103162185 B CN 103162185B
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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 2 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
Technical field
The present invention relates to Display Technique field, particularly a kind of side light type LED back light module and television set.
Background technology
Along with the development of electronic technology, create increasing electronic equipment, wherein, a lot of electronic equipment all has LCDs, and under normal circumstances, LCDs comprises liquid crystal panel and backlight module, described liquid crystal panel is made up of layer glass backboard therebetween one liquid crystal layer, wherein, because liquid crystal panel itself is not luminous, so need by backlight module for it provides uniform light-source system.
In the prior art, can provide light-source system by down straight aphototropism mode set or side entrance back module to liquid crystal panel, in this case, please refer to Fig. 1, side entrance back module comprises following structure:
Backboard 101;
Light guide plate 102, is arranged at described backboard 101 surface;
Liquid crystal panel 103, is arranged at described light guide plate 102 surface;
LED lamp bar 104, is arranged at least side of described light guide plate 102, and wherein in each LED lamp bar, layout has multiple LED light source;
Wherein, by the leaded light effect of described light guide plate 102, the incident light that multiple LED light sources of institute's layout in described LED lamp bar 104 produce can be distributed in described liquid crystal panel.
And along with the raising of LED power, the quantity of LED light source set in LED lamp bar is fewer and feweri, even only need to arrange LED light source in the region that four bights with light guide plate are relative, in this case, create 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;
Light guide plate 202, be arranged at described backboard 201 surface, the N number of bight 202a in four bights of described light guide plate 202 is wedge shape;
Liquid crystal panel 203, is arranged at described light guide plate 202 surface.
N group LED light source 204, is relatively arranged at described backboard 201 surface with described N number of bight 202a, and is the first angle of inclination between the first side 202b of arbitrary group of LED light source 203 in described N group LED light source 203 and described light guide plate 202.
Present inventor, in the process realizing the embodiment of the present application technical scheme, at least finds to there is following technical problem in prior art:
Due in the prior art, in the side light type LED back light module of angle light inlet, the light of incident light is mainly distributed in the zone line of light guide plate, the light portion of angular regions is then less, and then cause that the zone line of liquid crystal panel is brighter, folding corner region is comparatively dark, so the technical problem that the display brightness causing there is liquid crystal panel in prior art is uneven;
Such as: as shown in Figure 3, be the schematic diagram of one jiao of incident type LED-backlit module, comprising of described angle incident type LED-backlit module: backboard 30; Light guide plate 31, is arranged at described backboard 30 surface; First group of LED light source 32 is oppositely arranged with the bottom left of the light guide plate surface of described light guide plate 31; Second group of LED light source 33 is oppositely arranged with the bottom left of the light guide plate surface of described light guide plate 31; Liquid crystal panel 34;
Wherein, the incident light produced by described first group of LED light source 32 and described second group of LED light source 33 is after being incident to described liquid crystal panel 34, mainly be distributed in described liquid crystal panel 34 zone line 34a, then can there is dark space in corner 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, for solving the technical problem that in prior art, the display brightness of liquid crystal panel is uneven.
On the one hand, the application provides following technical scheme by an embodiment:
A kind of side light type LED back light module, comprising: backboard, light guide plate, is arranged at the back plate surface of described backboard, and the ZhongNGe bight, four bights of described light guide plate is wedge shape, and wherein, N is arbitrary integer of 2 to 4, N group LED light source, i-th group of LED light source in described N group LED light source is corresponding with i-th bight in described N number of bight to be arranged, and i is the arbitrary integer of 2 to N, wherein, described i-th group of incident light that LED light source produces is incident to described light guide plate from described i-th bight, liquid crystal panel, be arranged at the light guide plate surface of described light guide plate, the at least two group LED sub-light sources of second group of LED sub-light source that i-th group of LED light source in described N group LED light source comprises first group of LED sub-light source and connect with described first group of LED sub-light source, in the first angle of inclination between the first side of described first group of LED sub-light source and described light guide plate, described second group of LED sub-light source between described first side in second angle of inclination different with described first angle of inclination, described N group LED light source, specifically comprise: first group of LED light source, be oppositely arranged with the left comer be positioned at bottom described light guide plate surface in described N number of bight, be the first distance with the distance at the top of described light guide plate surface, second group of LED light source, be oppositely arranged with the right corner be positioned at bottom described light guide plate surface in described N number of bight, be second distance with the distance at the top of described light guide plate surface, wherein, the first distance threshold is less than with the distance at the top of described light guide plate surface bottom described liquid crystal panel, described in described first Distance geometry, second distance is all greater than described first distance threshold.
Optionally, the difference at described second angle of inclination and described first angle of inclination is greater than the first predetermined angle.
Optionally, described side light type LED back light module, also comprises: the 3rd group of LED light source, is oppositely arranged with the bottom of described light guide plate surface.
Optionally, described first angle of inclination is specially: 28 degree ~ 32 degree.
Optionally, described side light type LED back light module, also comprises:
Mirror-reflection bar, is oppositely arranged with the top of described light guide plate surface.
Optionally, described first angle of inclination is specially: 43 degree ~ 47 degree.
Optionally, described light guide plate 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 at least one site described is directly proportional in the incident distance of the incident light that the distribution density of described light guide plate surface produces to described N group LED light source.
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
The 3rd region in the middle of being positioned at bottom described printing surface, wherein, the described distribution density in described first area, described second area and described 3rd region is greater than the described distribution density in described other region of printing surface.
On the other hand, the application provides following technical scheme by another embodiment:
A kind of television set, comprising:
Casing;
Processor, is arranged in described casing;
Display unit, arrange on the housing, be connected with described processor, wherein, described display unit comprises: the side light type LED back light module that the application's any embodiment is introduced.
The one or more technical schemes provided in the embodiment of the present application, at least have following technique effect or advantage:
Due in the embodiment of the present application, enter at angle in the side light type LED back light module of formula, have employed the light inlet mode of multi-angle, each group LED light source in the N group LED light source of namely described side light type LED back light module 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 that difference enters its light of LED sub-light source of angular are also different, so, first group of LED light source produce the first incident light beam strikes to light guide plate so that make the distribution of light of light guide plate uneven time, the effect of light filling can be played to light guide plate by second group of LED sub-light source, thus the distribution of light of light guide plate can be made even, so the uniform technique effect of the display brightness reaching liquid crystal panel.
Accompanying drawing explanation
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 in prior art when the two bottom sides of the light guide plate surface of angle injection type backlight module arranges LED light source, cause liquid crystal panel to occur the schematic diagram of dark space;
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 first angle of inclination of side light type LED back light module in the embodiment of the present application one and the schematic diagram at the second angle of inclination;
Fig. 6 is the schematic diagram of the i-th group of LED light source comprising 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 two jiaos of corresponding schematic diagrames being provided with the side light type LED back light module of LED light source bottom light guide plate;
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 comprising the 3rd group of LED light source in the embodiment of the present application one;
Figure 10 is the schematic diagram of the side light type LED back light module comprising 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.
Detailed description of the invention
The embodiment of the present invention provides a kind of side light type LED back light module and television set, for solving the technical problem that in prior art, the display brightness of liquid crystal panel is uneven.
Technical scheme in the embodiment of the present application is solve above-mentioned technical problem, and general thought is as follows:
A kind of side light type LED back light module is provided, comprises: backboard; Light guide plate, is arranged at the back plate surface of described backboard, and the ZhongNGe bight, four bights of described light guide plate is wedge shape, and wherein, N is arbitrary integer of 1 to 4; N group LED light source, i-th group of LED light source in described N group LED light source is corresponding with i-th angle in described N number of bight to be arranged, and i is the arbitrary integer of 1 to N; Wherein, described i-th group of incident light that LED light source produces is incident to described light guide plate from described i-th bight; Liquid crystal panel, is arranged at the light guide plate surface of described light guide plate; At least two group LED sub-light sources of second group of LED sub-light source that i-th group of LED light source in described N group LED light source comprises first group of LED sub-light source and connect with described first group of LED sub-light source, in the first angle of inclination between the first side of described first group of LED sub-light source and described light guide plate, described second group of LED sub-light source between described first side in second angle of inclination different with described first angle of inclination.
When manufacturing side light type LED back light module owing to adopting such scheme, have employed the light inlet mode of multi-angle, each group LED light source in the N group LED light source of namely described side light type LED back light module 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 that difference enters its light of LED sub-light source of angular are also different, so, first group of LED light source produce the first incident light beam strikes to light guide plate so that make the distribution of light of light guide plate uneven time, the effect of light filling can be played to light guide plate by second group of LED sub-light source, thus the distribution of light of light guide plate can be made even, so the uniform technique effect of the display brightness reaching liquid crystal panel.
In order to better 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;
Light guide plate 42, is arranged at the back plate surface of described backboard 41, and four bights ZhongNGe bight 42a of described light guide plate 42 is wedge shape, and wherein, N is arbitrary integer of 1 to 4;
N group LED light source 43, i-th group of LED light source in described N group LED light source 43 is corresponding with i-th bight in described N number of bight 42a to be arranged, and i is the arbitrary integer of 1 to N; Wherein, described i-th group of incident light that LED light source produces is incident to described light guide plate 42 from described i-th bight; At least two group LED sub-light sources of second group of LED sub-light source 52 that i-th group of LED light source in described N group LED light source 43 comprises first group of LED sub-light source 51 and connect with described first group of LED sub-light source 51, described first group of LED sub-light source 51 (take described first side as the base of described light guide plate 42 with the first side 42b of described light guide plate 42, can certainly be other limits) between in the first angle of inclination 51a, described second group of LED sub-light source 52 between described first side 42b in the second angle of inclination 52a different with described first angle of inclination 51a;
Liquid crystal panel 44, is arranged at the light guide plate surface of described light guide plate 43.
In one embodiment, please continue to refer to Fig. 5, described i-th group of LED light source only comprises described first group of LED sub-light source 51 and described second group of LED sub-light source 52; In another embodiment, described i-th group of LED light source comprises other LED sub-light source except described first group of LED sub-light source 51 and described second group of LED sub-light source 52, please refer to Fig. 6, and described i-th group of LED light source comprises: first group of LED sub-light source 51; Second group of LED sub-light source 52, described second group of LED sub-light source 52 connects with described first group of LED sub-light source 51; 3rd group of LED sub-light source 53, described 3rd group of LED sub-light source 53 connects with described second group of LED sub-light source 52, wherein, described 3rd group of LED sub-light source 53 between described second group of LED sub-light source 52 in the three angle of inclination 53a all different with the second angle of inclination 52a with the first angle of inclination 51a.
In specific implementation process, described first angle of inclination 51a can be arbitrary value, such as: 30 °, 45 °, 60 ° etc.; Described second angle of inclination 52a also can be arbitrary value, such as: such as: 45 °, 60 °, 70 ° etc., this embodiment of the present application is not restricted.
For ensureing that the incident light that described first group of LED sub-light source 51 and described second group of LED sub-light source 52 produce is distributed in different regions, as a preferred embodiment, the difference at described second angle of inclination and described first angle of inclination is greater than the first predetermined angle, described first predetermined angle is such as: 10 degree, 12 degree etc., such as: described second inclination angles 52a is 45 °, described first angle of inclination 51a is 30 degree; Described second inclination angles 52a is 60 °, described first angle of inclination 51a is 45 ° etc., no longer itemizes, and be not restricted this embodiment of the present application.
In specific implementation process, described light guide plate 42 can comprise 1 ~ 4 bight, and then described side light type LED back light module also can arrange the LED light source of 1 ~ 4 group of varying number in corresponding described 1 ~ 4 bight, when described N is less than 4, described N group LED light source can be corresponding with any bight of described light guide plate 42, in one embodiment, as shown in Figure 7, described N group LED light source, specifically comprises:
First group of LED light source 43a, is oppositely arranged with the left comer 42a1 being positioned at 42c bottom described light guide plate surface in described N number of bight 42a, is the first distance 71 with the distance of the top 42d of described light guide plate surface;
Second group of LED light source 43b, being oppositely arranged with the right corner 42a2 being positioned at 42c bottom described light guide plate surface in described N number of bight 42a, is second distance 72 with the distance at the top of described light guide plate surface;
Wherein, bottom described liquid crystal panel 44, the distance 73 of the top 42d of 44a and described light guide plate surface is less than the first distance threshold, and described first distance 71 and described second distance 72 are all greater than described first distance threshold.
Wherein, in specific embodiment process, described first distance threshold is generally the width of described liquid crystal panel and described light guide plate top width sum, but not absolute limit is this value, can float about this value, wherein, as seen from Figure 7, described first distance threshold is greater than in described first distance 71 and described second distance 72, and when bottom described liquid crystal panel 44, the distance 73 of the top 42d of 44a and described light guide plate surface is less than the first distance threshold, described first group of LED light source 43a and described second group of LED light source 43b all and non-immediate towards described light guide plate light inlet, so ensure that has diffusion at incident light beam strikes to during light guide plate, thus light guide plate surface is prevented to occur speck.
And, in this case, only can arrange at the bottom 42c of the light guide plate surface of described side light type LED back light module and organize LED light source more, and then only need the bottom width increasing side light type LED back light module, namely only need the width of the bottom frame increasing 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 be positioned at bottom described light guide plate surface in described N number of bight, second group of LED light source, when being oppositely arranged with the right corner be positioned at bottom described light guide plate surface in described N number of bight, by the bottom lower than described liquid crystal panel that described first group of LED light source and described second group of LED light source are arranged, so, described first group of LED light source and described second group of LED light source non-immediate light inlet, and then the incident light of generation is spread completely, thus further reach the uniform technique effect of liquid crystal panel surface display brightness.
In specific implementation process, described light guide plate 42 generally includes following structure: incidence surface, exiting surface and printing surface, under normal circumstances, the region that distance LED light source is far away, its light incided is darker, so in order to make the distribution of light of liquid crystal panel 44 even, can give at least one site of printing surface surface distributed of described printing surface, at least one site described is directly proportional in the incident distance of the incident light that the distribution density of described light guide plate surface produces to described N group LED light source.
Specifically, namely incident light to enter luminous point network point distribution rare, and to increase gradually along the distribution density of the site in the direction of incidence, wherein, increase the dot density of printing surface, the effect of light filling can be played to the region of its correspondence, to prevent the deficiency of light.
As seen from the above description, due in the embodiment of the present application, the corresponding multiple site of printing surface of light guide plate, 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 light filling effect is better, and incident light distance is far away, its light is darker, so increase dot density by the increase of incident distance, reaches the more uniform technique effect of display brightness of described liquid crystal panel.
Wherein, when described side light type LED back light module comprises first group of LED light source 43a and second group of LED light source 43b as shown in Figure 7, please refer to Fig. 8, described printing surface specifically comprises:
Be positioned at the first area 81 of described printing surface top left side;
Be positioned at the second area 82 of described printing surface top right side; And
The 3rd region 83 in the middle of being positioned at bottom described printing surface, wherein, the described distribution density in described first area 81, described second area 82 and described 3rd region 83 is greater than the described distribution density in described other region of printing surface.
Wherein, when described light guide plate 22 comprises first group of LED light source 43a and second group of LED light source 43b as shown in Figure 7, in the first area 81 of printing surface top left side, be positioned at printing surface top right side second area 82 and be positioned at its light received of the 3rd region 83 of printing surface crown center can be darker, in order to play a light filling effect, dot density corresponding for these regions of printing surface 83 can be increased.Certainly, in specific implementation process, also can based on embody rule environment, the dot density of the zones of different of printing surface is increased, to play a light filling effect, thus make the distribution of light of liquid crystal panel 44 more even, the distribution density that is higher, which kind of site, region of the distribution density for the site in which kind of region of described printing surface 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, the dot density of the zone line bottom light guide plate top left side region, top right side region and light guide plate is arranged 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 increase dot density, further reach 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 of described light guide plate surface.
In specific implementation process, iff the 42c both sides, bottom with described light guide plate surface, LED light source is set, likely dark space can be there is at liquid crystal panel 44, such as: the zone line of described liquid crystal panel 44, in this case, can in the region relative and corresponding with described dark space with 43b bottom described light guide plate 42,3rd group of LED light source 91 is set, carry out light filling can to described dark space by described 3rd group of LED light source 91, and then make the distribution of light of described liquid crystal panel 44 more even.In addition, in specific implementation process, can based on the difference of the position of dark space, area size, the LED light source of varying number or different capacity is set to it, and the setting position of LED light source is also not limited to corresponding with 42c bottom described light guide plate 42, to reach best light filling effect, make the distribution of light of described liquid crystal panel 44 more even.
In specific implementation process, no matter which kind of angle described first angle of inclination 51a and described second angle of inclination 52a is, can be played the effect of light filling by the described 3rd group of dark space of LED light source 91 to described liquid crystal panel 44.Wherein, as a preferred embodiment, described first angle of inclination is specially: 28 degree ~ 32 degree.When described first angle of inclination is 28 degree ~ 32 degree of scopes, can by being oppositely arranged the mode of the 3rd group of LED light source 101 in the bottom with described light guide plate surface, preferably light filling effect is reached to described liquid crystal panel 44, and then the more even of the distribution of light on described liquid crystal panel 44 surface can be made.In addition, in specific implementation process, can based on the difference of the position of dark space, area size, the LED light source of varying number or different capacity is set to it, and the setting position of LED light source is also not limited to corresponding with the bottom 42c of described light guide plate surface, to reach best light filling effect, make the distribution of light of described liquid crystal panel 44 more even.
As seen from the above description, due in the embodiment of the present application, have employed the technical scheme that the 3rd group of LED light source is set in described side-light type LED light source, wherein, the bottom of described 3rd group of LED light source and described light guide plate surface is oppositely arranged, so light filling can be carried out to the dark space of the described liquid crystal panel that described first group of LED light source and described second group of LED light source cause, and then the more uniform technique effect of the display brightness further reaching liquid crystal panel.
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 of described light guide plate surface.Wherein, after incident light is emitted to described mirror-reflection bar 101, the mode by mirror-reflection reflects described incident light to described liquid crystal panel 44.
Under normal circumstances, in the prior art, a reflection bar can be oppositely arranged with the top 42d of described light guide plate surface, wherein, when incident light beam strikes is to described reflection bar, described liquid crystal panel 44 can be reflexed to by irreflexive mode, to reach the effect of light filling, but when adopting irreflexive mode to reflect light, because too disperseed by the light reflected, thus can not carry out light filling for dark space, so can by the mode of mirror-reflection, to light be penetrated reflex to the dark space of described liquid crystal panel 44, to reach better light filling effect.In specific implementation process, described mirror-reflection bar 101 is such as: silver slurry minute surface launches 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 first angle of inclination 51a and described second angle of inclination 52a is, can be played the effect of light filling by the dark space of described mirror-reflection bar 101 to described liquid crystal panel 44.As a preferred embodiment, described first angle of inclination is specially: 43 degree ~ 47 degree.When described first angle of inclination is 43 degree ~ 47 degree of degree scopes, can by being oppositely arranged the mode of mirror-reflection bar 101 with the top 42d of described light guide plate surface, preferably light filling effect is reached to described liquid crystal panel 44, and then the more even of the distribution of light on described liquid crystal panel 44 surface can be made.In specific implementation process, described mirror-reflection bar 101 is such as: silver slurry minute surface launches 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, the region relative with light guide plate surface top is provided with mirror-reflection bar, so the incident light being incident to described mirror-reflection bar to be reflexed to the dark space of liquid crystal panel by the mode of mirror-reflection, wherein, because the mode of mirror-reflection is compared to diffuse reflectance used in the prior art, its reflecting effect is better, so the more uniform technique effect of the display brightness further reaching liquid crystal panel.
In addition, in specific implementation process, above-mentioned a kind of mode can be only adopted to carry out light filling to described liquid crystal panel 44, also the combination of above-mentioned various ways can be adopted to carry out light filling to described liquid crystal panel 44, such as: mirror-reflection articles 101 is set while the 3rd group of LED light source 91 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 described casing 111;
Display unit 113, is arranged on described casing 111, is connected with described processor 112, and wherein, described display unit 113 comprises arbitrary side light type LED back light module 113a that the embodiment of the present application one is introduced.
Due to the television set that the embodiment of the present application two is introduced, television set manufactured by the side light type LED back light module introduced for adopting the embodiment of the present application one, so based on the side light type LED back light module introduced 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 the television set manufactured by side light type LED back light module that those skilled in the art adopt the embodiment of the present application one to introduce, all belong to the application for protection scope.
One or more technical schemes that the application provides, at least have following technique effect or advantage:
(1) due in the embodiment of the present application, enter at angle in the side light type LED back light module of formula, have employed the light inlet mode of multi-angle, each group LED light source in the N group LED light source of namely described side light type LED back light module 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 that difference enters its light of LED sub-light source of angular are also different, so, first group of LED light source produce the first incident light beam strikes to light guide plate so that make the distribution of light of light guide plate uneven time, the effect of light filling can be played to light guide plate by second group of LED sub-light source, thus the distribution of light of light guide plate can be made even, so the uniform technique effect of the display brightness reaching 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 be positioned at bottom described light guide plate surface in described N number of bight, second group of LED light source, when being oppositely arranged with the right corner be positioned at bottom described light guide plate surface in described N number of bight, by the bottom lower than described liquid crystal panel that described first group of LED light source and described second group of LED light source are arranged, so, described first group of LED light source and described second group of LED light source non-immediate light inlet, and then the incident light of generation is spread completely, thus further reach the uniform technique effect of liquid crystal panel surface display brightness.
(3) due in the embodiment of the present application, have employed the technical scheme that the 3rd group of LED light source is set in described side-light type LED light source, wherein, the bottom of described 3rd group of LED light source and described light guide plate surface is oppositely arranged, so light filling can be carried out to the dark space of the described liquid crystal panel that described first group of LED light source and described second group of LED light source cause, and then the more uniform technique effect of the display brightness further reaching liquid crystal panel.
(4) due in the embodiment of the present application, the region relative with light guide plate surface top is provided with mirror-reflection bar, so the incident light being incident to described mirror-reflection bar to be reflexed to the dark space of liquid crystal panel by the mode of mirror-reflection, wherein, because the mode of mirror-reflection is compared to diffuse reflectance used in the prior art, its reflecting effect is better, so the more uniform technique effect of the display brightness further reaching liquid crystal panel.
(5) due in the embodiment of the present application, the corresponding multiple site of printing surface of light guide plate, wherein, the distribution density of site on printing surface is directly proportional to the incident distance of incident light, wherein, dot density is higher, light filling effect is better, and incident light distance is far away, and its light is darker, so increase dot density by the increase of incident distance, reach the more uniform technique effect of display brightness of described liquid crystal panel.
(6) due in the embodiment of the present application, the dot density of the zone line bottom light guide plate top left side region, top right side region and light guide plate is arranged 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 increase dot density, further reach the more uniform technique effect of display brightness of described liquid crystal panel.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Claims (9)
1. a side light type LED back light module, comprising: backboard; Light guide plate, is arranged at the back plate surface of described backboard, and the ZhongNGe bight, four bights of described light guide plate is wedge shape, and wherein, N is arbitrary integer of 2 to 4; N group LED light source, i-th group of LED light source in described N group LED light source is corresponding with i-th bight in described N number of bight to be arranged, and i is the arbitrary integer of 2 to N; Wherein, described i-th group of incident light that LED light source produces is incident to described light guide plate from described i-th bight; Liquid crystal panel, is arranged at the light guide plate surface of described light guide plate, it is characterized in that:
At least two group LED sub-light sources of second group of LED sub-light source that i-th group of LED light source in described N group LED light source comprises first group of LED sub-light source and connect with described first group of LED sub-light source, in the first angle of inclination between the first side of described first group of LED sub-light source and described light guide plate, described second group of LED sub-light source between described first side in second angle of inclination different with described first angle of inclination;
Described N group LED light source, specifically comprise: first group of LED light source, be oppositely arranged with the left comer be positioned at bottom described light guide plate surface in described N number of bight, be the first distance with the distance at the top of described light guide plate surface, second group of LED light source, be oppositely arranged with the right corner be positioned at bottom described light guide plate surface in described N number of bight, be second distance with the distance at the top of described light guide plate surface, wherein, the first distance threshold is less than with the distance at the top of described light guide plate surface bottom described liquid crystal panel, described in described first Distance geometry, second distance is all greater than described first distance threshold.
2. side light type LED back light module as claimed in claim 1, it is characterized in that, the difference at described second angle of inclination and described first angle of inclination is greater than the first predetermined angle.
3. side light type LED back light module as claimed in claim 1, it 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 of described light guide plate surface.
4. side light type LED back light module as claimed in claim 3, it is characterized in that, described first angle of inclination is specially: 28 degree ~ 32 degree.
5. side light type LED back light module as claimed in claim 1, it is characterized in that, described side light type LED back light module, also comprises:
Mirror-reflection bar, is oppositely arranged with the top of described light guide plate surface.
6. side light type LED back light module as claimed in claim 5, it is characterized in that, described first angle of inclination is specially: 43 degree ~ 47 degree.
7. side light type LED back light module as claimed in claim 1, it is characterized in that, described light guide plate 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 at least one site described is directly proportional in the incident distance of the incident light that the distribution density of described light guide plate surface produces to described N group LED light source.
8. side light type LED back light module as claimed in claim 7, it 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
The 3rd region in the middle of being positioned at bottom described printing surface, wherein, the described distribution density in described first area, described second area and described 3rd region is greater than the described distribution density in described other region of printing surface.
9. a television set, is characterized in that, comprising:
Casing;
Processor, is arranged in described casing;
Display unit, arrange on the housing, be connected with described processor, wherein, described display unit comprises: the side light type LED back light module as described in claim as arbitrary in claim 1-8.
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| CN201310057157.3A CN103162185B (en) | 2013-02-22 | 2013-02-22 | Edge-lit type light-emitting diode (LED) backlight module and television |
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| CN201310057157.3A CN103162185B (en) | 2013-02-22 | 2013-02-22 | Edge-lit type light-emitting diode (LED) backlight module and television |
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| CN103162185B true CN103162185B (en) | 2015-04-29 |
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| KR102569966B1 (en) * | 2016-08-02 | 2023-08-23 | 삼성디스플레이 주식회사 | Light emitting module and a display device comprises the same |
| KR102626224B1 (en) * | 2016-08-31 | 2024-01-17 | 삼성디스플레이 주식회사 | Light emitting module and display device having the same |
| CN108836385A (en) * | 2018-05-07 | 2018-11-20 | 徐菡 | Portable ultraphonic machine |
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| US5921651A (en) * | 1995-03-31 | 1999-07-13 | Enplas Corporation | Surface light source device of side light type having diffusing element with improved distribution pattern of light |
| CN201072481Y (en) * | 2006-12-04 | 2008-06-11 | 台湾奈普光电科技股份有限公司 | Light source of backlight module |
| CN101893785A (en) * | 2010-06-25 | 2010-11-24 | 深圳创维－Rgb电子有限公司 | Method for implementing backlight of liquid display |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3648030B2 (en) * | 1997-11-05 | 2005-05-18 | 株式会社日立製作所 | Liquid crystal display |
| JP5801065B2 (en) * | 2011-03-03 | 2015-10-28 | 株式会社ジャパンディスプレイ | Liquid crystal display |
| KR20130019079A (en) * | 2011-08-16 | 2013-02-26 | 삼성디스플레이 주식회사 | Backlight assembly and display apparatus having the same |
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| US5921651A (en) * | 1995-03-31 | 1999-07-13 | Enplas Corporation | Surface light source device of side light type having diffusing element with improved distribution pattern of light |
| CN201072481Y (en) * | 2006-12-04 | 2008-06-11 | 台湾奈普光电科技股份有限公司 | Light source of backlight module |
| CN101893785A (en) * | 2010-06-25 | 2010-11-24 | 深圳创维－Rgb电子有限公司 | Method for implementing backlight of liquid display |
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