CN103062668A - Backlight unit lamp strip and method for arranging LEDs on basis of backlight unit lamp strip - Google Patents
Backlight unit lamp strip and method for arranging LEDs on basis of backlight unit lamp strip Download PDFInfo
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- CN103062668A CN103062668A CN2013100236607A CN201310023660A CN103062668A CN 103062668 A CN103062668 A CN 103062668A CN 2013100236607 A CN2013100236607 A CN 2013100236607A CN 201310023660 A CN201310023660 A CN 201310023660A CN 103062668 A CN103062668 A CN 103062668A
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Abstract
The invention discloses a backlight unit lamp strip and a method for arranging light-emitting diodes on the basis of the backlight unit lamp strip. The backlight unit lamp strip comprises a printed circuit board and at least two different types of light-emitting diodes. The different types of light-emitting diodes have different luminous fluxes and power. The different types of light-emitting diodes are alternately arranged on the printed circuit board, and the sum of the luminous fluxes and the sum of the power of the different types of light-emitting diodes are respectively equal to the total required luminous flux and the total required power. The backlight unit lamp strip and the method have the advantages that the requirement on temperature rise can be met while the brightness is guaranteed, and accordingly a display effect of an LCD (liquid crystal display) can be improved.
Description
Technical field
The present invention relates to backlight module (BLU, Back Light Unit) technology, relate in particular to a kind of backlight module lamp bar and based on the LED arrangement method of backlight module lamp bar.
Background technology
Liquid crystal display (LCD, Liquid Crystal Display) need to arrange light emitting source at the LCD panel originally as non-luminous display element, just can reach effect luminous and that show.In the prior art, BLU lamp bar is the optical module that back side light source is provided to LCD.Usually, BLU receives light emitting diode (LED, Light Emitting Diode), cold-cathode fluorescence lamp (CCFL, Cold Cathode Fluorescent Lamp) or EL part (EL, Electro Luminescence) three kinds of light sources that mode provides, light is reflected and optically focused, form light emitting source.
In side-light backlight module lamp bar, by the LED permutation and combination is become linear light sources, can enter optical efficiency by Effective Raise.
Fig. 1 is the structural representation of existing backlight module lamp bar.Referring to Fig. 1, this backlight module lamp bar comprises: LED101 and printed circuit board (PCB) (PCB, Printed Circuit Board) 102, wherein, LED101 evenly encapsulates, is arranged on the PCB102, and the power of each LED101 is identical, and PCB is shaped as the cuboid body, offer uniform hole slot 103, be used for accommodating LED101.That is to say, the LED of the upper employing of PCB equal-wattage encapsulation, PCB adopts unified width, and LED arranges at backlight module lamp bar surface uniform.
In the practical application, LED101 can be divided into middle power LED and great power LED.Wherein, the power of middle power LED can be 0.4W and 0.6W, and the power of great power LED can be 0.8W and 1W.
Existing backlight module lamp bar, because lamp bar length restriction, in use there are the following problems:
If in the backlight module lamp bar, power LED during LED all adopts then can exist total light flux inadequate, because brightness is relevant with the size of luminous flux, causes backlight illumination on the low side, does not satisfy design brightness demand, so that LCD brightness is inadequate, display effect is relatively poor;
If in the backlight module lamp bar, LED all adopts high-capacity LED, although can be so that total light flux satisfies brightness requirement, thereby make backlight illumination satisfy design brightness demand, but because LED power is excessive, the heat-sinking capability of backlight module lamp bar is not enough, so that temperature raises, will shorten the service life of backlight module lamp bar, and temperature rise does not meet design requirement.And if when all adopting the high-capacity LED light emitting diode, backlight module lamp bar excess Temperature can cause the LED deflection efficiency to reduce, and produces a black speck.
By as seen above-mentioned, existing backlight module lamp bar, structure is simpler, and the mode of the LED by evenly distributed equal-wattage and luminous flux difficultly satisfies designed temperature rise requirement when satisfying the backlight illumination requirement.
Summary of the invention
Embodiments of the invention provide a kind of backlight module lamp bar, improve the display effect of LCD.
Embodiments of the invention also provide a kind of light-emitting diode arrangement method based on backlight module lamp bar, improve the display effect of LCD.
For achieving the above object, the embodiment of the invention provides a kind of backlight module lamp bar, and this backlight module lamp bar comprises: printed circuit board (PCB), at least two kinds of different types of light emitting diodes, and described different types of light emitting diode has different luminous fluxes and power, wherein
Described at least two kinds of different types of light emitting diodes alternately arrange at described printed circuit board (PCB),
The summation of the luminous flux of described at least two kinds of different types of light emitting diodes and the summation of power equal respectively total light flux and the general power of designing requirement.
Preferably, described at least two kinds of different types of light emitting diodes comprise the first light emitting diode and the second light emitting diode, and the luminous flux of the first light emitting diode and power are greater than luminous flux and the power of the second light emitting diode; Offer corresponding with the second light emitting diode up and down penetrating open slot on the described printed circuit board (PCB), the center of open slot and the second light emitting diode be centered close to the same face.
Preferably, the first light emitting diode and the second light emitting diode evenly encapsulate respectively, are contained in the printed circuit board (PCB) of horizontal positioned.
Preferably, described backlight module lamp bar further comprises: at the first light emitting diode and the second light emitting diode both sides jump ring is set, establishes the bayonet socket for fixing described jump ring in the printed circuit board (PCB) both sides of accommodating the first light emitting diode and the second light emitting diode.
Preferably, the quantity of the first light emitting diode or the second light emitting diode is one or more.
Preferably, in the described smooth module lamp bar, each first light emitting diode sequentially intersects cross arrangement on printed circuit board (PCB) with each second light emitting diode; Or a plurality of the first light emitting diodes sequentially intersect cross arrangement on printed circuit board (PCB) with second light emitting diode; Or first light emitting diode sequentially intersects cross arrangement on printed circuit board (PCB) with a plurality of the second light emitting diodes; Or a plurality of the first light emitting diodes sequentially intersect cross arrangement on printed circuit board (PCB) with a plurality of the second light emitting diodes.
For reaching another above-mentioned purpose, the embodiment of the invention also provides a kind of light-emitting diode arrangement method based on backlight module lamp bar, and described backlight module lamp bar comprises: printed circuit board (PCB), at least two kinds of different types of light emitting diodes, and the method comprises:
Based on required total light flux and the general power of described backlight module lamp bar, select at least two kinds of variety classes light emitting diodes corresponding to different luminous fluxes and power, the summation of the luminous flux of at least two kinds of different types of light emitting diodes and power summation equal respectively required total light flux and general power;
Described at least two kinds of different types of light emitting diodes are arranged alternately on printed circuit board (PCB).
Preferably, in described light-emitting diode arrangement method, described two kinds of different types of light emitting diodes comprise the first light emitting diode and the second light emitting diode; The first light emitting diode is evenly encapsulated, is contained in the printed circuit board (PCB) of horizontal positioned; The second light emitting diode is evenly encapsulated, is contained in the printed circuit board (PCB) of horizontal positioned.
Preferably, in described light-emitting diode arrangement method, the luminous flux of described the first light emitting diode and power are greater than luminous flux and the power of the second light emitting diode; Offer corresponding with the second light emitting diode up and down penetrating open slot at described printed circuit board (PCB), the center of open slot and the second light emitting diode be centered close to the same face.
Preferably, described light-emitting diode arrangement method further comprises:
At the first light emitting diode and the second light emitting diode both sides jump ring is set in advance, establishes the bayonet socket for fixing described jump ring in the printed circuit board (PCB) both sides of accommodating the first light emitting diode and the second light emitting diode.
Preferably, in described light-emitting diode arrangement method, the mode of described cross arrangement comprises: each first light emitting diode sequentially intersects with each second light emitting diode, a plurality of the first light emitting diode sequentially intersects with second light emitting diode, first light emitting diode sequentially intersects with a plurality of the second light emitting diodes and a plurality of the first light emitting diode sequentially intersects with a plurality of the second light emitting diodes.
Preferably, in described light-emitting diode arrangement method, the length of described open slot and width are according to the power of the spacing between the first light emitting diode and the second light emitting diode, the first light emitting diode and the power determination of the second light emitting diode.
As seen from the above technical solution, in a kind of backlight module lamp bar that the embodiment of the invention provides and the light-emitting diode arrangement method based on backlight module lamp bar, backlight module lamp bar comprises: printed circuit board (PCB), at least two kinds of different types of light emitting diodes, wherein, described at least two kinds of different types of light emitting diodes have different luminous fluxes and power, and described at least two kinds of different types of light emitting diodes alternately arrange at described printed circuit board (PCB).Like this, carry out cross arrangement by the LED with different luminous fluxes and power at PCB, make the luminous flux sum of each LED and power sum satisfy respectively LCD demonstration required total light flux and general power.Because in LCD, the total light flux of backlight module lamp bar and the brightness of LCD are the direct ratio linear relationships, and the general power of backlight module lamp bar becomes to be similar to proportional relation with temperature rise, therefore, the present invention is by be arranged alternately two kinds of different types of light emitting diodes on described printed circuit board (PCB) at least, and so that satisfying respectively LCD, the luminous flux sum of all light emitting diodes and power sum show required total light flux and general power, can when guaranteeing the LCD brightness requirement, satisfy the temperature rise requirement, improve the display effect of LCD.
The backlight module lamp bar that utilizes the embodiment of the invention to provide reaches the light-emitting diode arrangement method based on backlight module lamp bar, can obtain following technique effect:
1, the present invention adopts the combination of the LED light emitting diode of different capacity, and the design of multiple backlight module lamp bar can be provided, and can design the distinctiveness product of different brightness and temperature rise demand;
2, the present invention adopts the combination of the LED light emitting diode of different capacity, solved backlight module lamp bar of the prior art all adopt in during the power LED light emitting diode, the problem that brightness does not meet design requirement improves display brightness, optimizes display effect;
3, the present invention adopts the combination of the LED light emitting diode of different capacity, when having solved backlight module lamp bar of the prior art and all adopting the high-capacity LED light emitting diode, temperature rise is too high not to meet design requirement and reduces lamp bar temperature, prolongs the LED lamp bar problem in service life;
4, the present invention adopts the combination of the LED light emitting diode of different capacity, and when having solved backlight module lamp bar of the prior art and all adopting the high-capacity LED light emitting diode, excess Temperature can bring the LED deflection efficiency to reduce, and produces the problems such as a black speck.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art.Apparently, the accompanying drawing in below describing only is some embodiments of the present invention, for those of ordinary skills, can also obtain according to these accompanying drawing illustrated embodiments other embodiment and accompanying drawing thereof.
Fig. 1 is the structural representation of existing backlight module lamp bar.
Fig. 2 is the structural representation of embodiment of the invention backlight module lamp bar.
Fig. 3 is another structural representation of embodiment of the invention backlight module lamp bar.
Fig. 4 is that the embodiment of the invention is based on the light-emitting diode arrangement method flow schematic diagram of backlight module lamp bar.
The specific embodiment
Below with reference to accompanying drawing the technical scheme of various embodiments of the present invention is carried out clear, complete description, obviously, described embodiment only is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are resulting all other embodiment under the prerequisite of not making creative work, all belong to the scope that the present invention protects.
Existing backlight module lamp bar, the upper evenly distributed LED of PCB, difficulty reaches better balance between total light flux and temperature rise, so that the LCD demonstration is brighter or darker, display effect is relatively poor, the comfortableness that affects the user is experienced.
In the embodiment of the invention, consider to adopt the mode of combined crosswise, the LED of different capacity is carried out cross arrangement at PCB, when the power sum of LED satisfies general power and requires, make total light flux satisfy LCD and show required luminous flux threshold value.Simultaneously, in order to improve the heat dispersion at great power LED place, by the PCB of different in width aluminium base is set for the LED of different capacity, so that the radiating surface at great power LED place is greater than the radiating surface at low-power LED place.Like this, in the situation that realize that temperature rise satisfies the demands, farthest improve the total light flux value, reached and satisfy the temperature rise requirement, and promoted the purpose of backlight illumination.Further, the LED by different in width aluminium base and different capacity makes up, and during the LED that has fundamentally solved big or middle power uses, is difficult to reach the technical problem of better balance between total light flux and the temperature rise.That is to say, be set to difform structure by aluminium base, and with the LED of different capacity, different encapsulation, different luminous fluxes, mode according to cross arrangement, aluminium base (PCB) in conjunction with different in width is combined into backlight module lamp bar, thereby realize that brightness maximization, temperature rise minimize, finally reach the moderate purpose of backlight illumination, experience with the comfortableness that promotes the user.
As previously mentioned, in LCD, the total light flux of the backlight module lamp bar linear relationship that is directly proportional with the brightness of LCD, the general power of backlight module lamp bar becomes to be similar to proportional relation with temperature rise.In the practical application, the printed circuit board (PCB) of designed usefulness usually has enough installing spaces and holds the light emitting diode that lower needs are installed.In the embodiment of the invention, backlight module lamp bar comprises printed circuit board (PCB), at least two kinds of different types of light emitting diodes.Wherein, at least two kinds of different types of light emitting diodes are arranged alternately on printed circuit board (PCB), and the luminous flux of described at least two kinds of different types of light emitting diodes is not identical with power.In order to satisfy designed brightness and temperature rise requirement, the summation of the luminous flux of at least two kinds of different types of light emitting diodes and the summation of power equal respectively backlight module lamp bar required total light flux and general power.
Alternatively, the installing space of the printed circuit board (PCB) of lamp bar for example length inadequate with the situation of holding various light emitting diodes under, when selecting the quantity of described at least two kinds of different types of light emitting diodes and each Light-Emitting Diode, except based on required total light flux and the general power of described backlight module lamp bar, also select the concrete quantity of different types of light emitting diode and each light emitting diode according to the length that light emitting diode quantity can be set on the described printed circuit board (PCB).
Preferably, at least two kinds of different types of light emitting diodes comprise the first light emitting diode and the second light emitting diode, and the luminous flux of the first light emitting diode and power are greater than luminous flux and the power of the second light emitting diode.
Fig. 2 is the structural representation of the backlight module lamp bar of one embodiment of the present of invention.Referring to Fig. 2, this backlight module lamp bar comprises a LED201, printed circuit board (PCB) (PCB, Printed Circuit Board) the 202 and the 2nd LED203.In embodiment illustrated in fig. 2, a LED201 and the 2nd LED203 are two kinds of different types of light emitting diodes, and described different types of light emitting diode has different luminous fluxes and power.Wherein, two kinds of different types of light emitting diodes alternately arrange at described printed circuit board (PCB).
For the backlight module lamp bar that for example is arranged among the LCD, the total light flux that it is required and general power are always known in advance.On the other hand, because general power becomes linear approximate relationship with temperature rise, satisfy the requirement of general power, also just substantially satisfied the temperature rise requirement; Satisfy the requirement of total light flux, also just satisfied the requirement of brightness.Therefore, of the present invention embodiment illustrated in fig. 2 in, based on required total light flux and general power, select the quantity of two kinds of different types of light emitting diodes and corresponding Light-Emitting Diode, so that the summation of the summation of the luminous flux of selected different types of light emitting diode and power equals required total light flux and general power.
It will be understood by those skilled in the art that as an alternative, backlight module lamp bar also can comprise different types of light emitting diode more than three kinds or four kinds.No matter adopt the how many kinds of light emitting diode, the luminous flux sum of selected various light emitting diodes and power sum all need the total light flux and the general power that equal respectively required.
Among the embodiment shown in Figure 2, a LED201 evenly encapsulates, is contained among the PCB202 of horizontal positioned;
In the embodiment of the invention, the quantity of a LED201 is one or more, and the power of each LED201 is identical.
The 2nd LED203 evenly encapsulates, is contained among the PCB202 of horizontal positioned, and the power of a LED201 and luminous flux are greater than power and the luminous flux of the 2nd LED203;
In the embodiment of the invention, similar to a LED201, the quantity of the 2nd LED203 is one or more, and the power of each the 2nd LED203 is identical.
In the practical application, the quantity of a LED201 can be identical with the quantity of the 2nd LED203, also can be different.
Preferably, the power of a LED201 is 0.6w, and corresponding luminous flux is 58 lumens (lm), and then the power of the 2nd LED203 is 0.4w, and corresponding luminous flux is 34lm; Certainly, in the practical application, the power of a LED201 also can be set to 1w, and corresponding luminous flux is 78lm, and then the power of the 2nd LED203 can be set to 0.4w, also can be set to 0.6w.
The one LED201 and the 2nd LED203 cross arrangement on PCB202, a LED201 of cross arrangement and the 2nd LED203 form line source;
Offer corresponding with the 2nd LED203 up and down penetrating open slot 204 on the PCB202, the center of open slot 204 and the 2nd LED203 are centered close to the same face.
In the embodiment of the invention, if the direction of cross arrangement the one LED201 and the 2nd LED203 is horizontal direction, the length of corresponding PCB202, direction with the cross arrangement perpendicular direction on the horizontal plane is fore-and-aft direction, the width of corresponding PCB202, the direction of an accommodating LED201 is vertical direction, the thickness of corresponding PCB202.
PCB202 is on the direction (fore-and-aft direction) vertical with the direction (vertical direction) of an accommodating LED201, offer open slot 204, open slot 204 is corresponding the 2nd LED203 on fore-and-aft direction, namely on fore-and-aft direction, the PCB width (fore-and-aft direction) of accommodating the 2nd LED203 is less than the PCB width of an accommodating LED201.Like this, by adopting the LED cross arrangement of different capacity, form line source, so that the total light flux that the LED of cross arrangement produces meets the requirements, and the LED employing radiator portion larger PCB larger to power, the LED that power is little adopts the less PCB of radiator portion, namely reduces the PCB width, can reach the balance and stability of backlight module lamp bar LED temperature rise with this.
Preferably, the length of open slot 204 and width can be according to the power of the spacing between a LED201 and the 2nd LED203, a LED201 and the power determinations of the 2nd LED203.In the practical application, also can method by experiment determine length and the width of open slot 204, so that in the situation that satisfy the total light flux value, temperature rise maintains in the rational regional extent.That is to say, the power ratio of LED is directly proportional with the area that LED surrounds, and the LED larger to power adopts the larger PCB of radiator portion, and to lower-powered LED, reduce the PCB width of radiator portion, thereby help further to reach the balance and stability of lamp bar LED temperature rise.
Like this, of the present invention embodiment illustrated in fig. 2 in, according to the spatial accommodation that can place LED on the printed circuit board (PCB) (for example length), take mode alternately to arrange high-capacity LED and the low-power LED of respective numbers, not only can solve the optics trend that the LED light intensity difference of different capacity brings changes, and the temperature rise of lamp bar is controlled within the zone of reasonableness, finally realize in the situation that identical drive current, the whole luminous flux of lamp bar is increased, so that backlight module lamp bar reaches better balance between total light flux and temperature rise, so that LCD brightness is moderate, improved the display effect of LCD, reach the balance of the bar brightness of backlight module lamp and temperature rise demand.
Preferably, the one LED201 and the 3rd LED203 both sides are provided with jump ring, both sides are provided with for the fixing bayonet socket of jump ring among the PCB202 of an accommodating LED201 and the 2nd LED203, jump ring is embedded in the bayonet socket, can be so that LED be fixed in the hole among the PCB, like this, when LED damages, take out to change in can the hole from PCB and get final product, made things convenient for the replacing of LED and structure comparatively simple.
During the present invention is embodiment illustrated in fig. 2, according to desired total logical light quantity, general power, choose a LED201 and the 2nd LED203 of respective numbers.For example, the mode of the one LED201 and the 2nd LED203 cross arrangement on PCB202 can be that each LED201 sequentially intersects with each the 2nd LED203, after namely arranging a LED201, then arrange the 2nd LED203, and then arrange a LED201, so circulation, namely the quantity of the first and second LED is identical; Also can be that a plurality of LED201 sequentially intersect with one the 2nd LED203, be after a plurality of LED201 sequentially arrange, then arrange one the 2nd LED203, and then a plurality of LED201 are sequentially arranged, so circulation, namely the number of a LED201 is the corresponding multiple of the number of the 2nd LED203; Also can be that a LED201 sequentially intersects with a plurality of the 2nd LED203, after namely a LED201 arranges, then sequentially arrange a plurality of the 2nd LED203, and then arrange a LED201, so circulation, namely the number of the 2nd LED203 is the corresponding multiple of the number of a LED201; Can also be that a plurality of LED201 sequentially intersect with a plurality of the 2nd LED203, be after a plurality of LED201 sequentially arrange, then sequentially arrange a plurality of the 2nd LED203, and then a plurality of LED201 are sequentially arranged, so circulation, namely the number of a LED201 is neither the corresponding multiple of the number of the 2nd LED203 is not identical yet.Certainly, in the practical application, also can adopt the cross arrangement of alternate manner.
As an alternative, as previously mentioned, in the less situation in the space of the printed circuit board (PCB) of diode installed, except needs are considered required total light flux and the factor of general power, also need to consider the space size of the printed circuit board (PCB) of diode installed, so that selected various light emitting diode is when satisfying total logical light quantity and general power requirement, all light emitting diodes can be installed at printed circuit board (PCB).In this case, the concrete quantity of the first and second selected LED and corresponding arrangement mode just just satisfy a part of assembled arrangement mode in the various assembled arrangement modes of light emitting diode of requirement of total light flux and general power.If the light emitting diode more than three kinds or three kinds, the kind quantity of the light emitting diode that can select so and the number of different types of light emitting diode and assembled arrangement mode also are a part of assembled arrangement modes that can satisfy in the various assembled arrangement modes of the light emitting diode that total light flux and general power require.
Fig. 3 is another structural representation of the backlight module lamp bar of example embodiment of the present invention.Referring to Fig. 3, the one LED201 and the 2nd LED203 mode of cross arrangement on PCB202 is that per two LED201 sequentially intersect with per two the 2nd LED203, after namely two LED201 sequentially arrange, then sequentially arrange two the 2nd LED203, and then two LED201 are sequentially arranged so circulation.The power of the one LED201 is larger, adopts the larger PCB of radiator portion, and the power less of the 2nd LED203 adopts the less PCB of radiator portion.
By as seen above-mentioned, the backlight module lamp bar of embodiment shown in Figure 3, a LED evenly encapsulates, is contained among the PCB of horizontal positioned; The 2nd LED evenly encapsulates, is contained among the PCB of horizontal positioned, and the power of a LED is greater than the power of the 2nd LED; By the cross arrangement on PCB with a LED and the 2nd LED, and so that a LED of cross arrangement and the 2nd LED form line source; Simultaneously, offer corresponding with the 2nd LED up and down penetrating open slot at PCB, the center of open slot and the 2nd LED are centered close to the same face.Like this, the LED of different capacity is carried out cross arrangement at PCB, and the radiating surface of LED on PCB of adjustment different capacity, so that the radiating surface at great power LED place is greater than the radiating surface at low-power LED place, make total light flux can satisfy LCD and show required luminous flux threshold value, the LED of different capacity is rationally dispelled the heat, thereby the control temperature rise is in rational scope, the total light flux of having avoided evenly distributed low-power LED to cause is less, temperature rise is less, LCD brightness is inadequate, the situation that display effect is relatively poor; The total light flux of also having avoided evenly distributed middle great power LED to cause is large, temperature rise is higher, LCD brightness is stronger, display effect or relatively poor situation, between total light flux and temperature rise, reach better balance, thereby realize that brightness maximization, temperature rise minimize, finally reach the moderate purpose of backlight illumination, the comfortableness that has promoted the user is experienced, improve simultaneously the reliability of backlight module lamp bar, improved light utilization efficiency.
Fig. 4 is the light-emitting diode arrangement method flow schematic diagram based on backlight module lamp bar of the embodiment of the invention.Referring to Fig. 4, at first, in step 400, based on backlight module lamp bar required total light flux and general power, select the quantity of at least two kinds of different types of light emitting diodes and each light emitting diode, so that the luminous flux sum of all light emitting diodes and power sum equal respectively required total light flux and general power, the luminous flux of wherein said two kinds of different types of light emitting diodes is not identical with power.As example, select two kinds of different types of LED, i.e. the first and second LED and corresponding quantity thereof.Replacedly, if the installing space on the printed circuit board (PCB) is limited length system for example, then from the various combinations of the light emitting diode that satisfies required total light flux and general power, choose and be suitable in limited installing space, arranging the light emitting diode kind of LED and the combination of corresponding LED quantity.For ease of explanation, during following step is described take choose two kinds of different types of LED namely a LED and the 2nd LED as example.
Next, described at least two kinds of different types of light emitting diodes alternately are set on printed circuit board (PCB).
Particularly:
Step 401 is offered corresponding with the 2nd LED up and down penetrating open slot at PCB in advance, and the center of described open slot and described the 2nd LED are centered close to the same face;
In this step, the length of open slot and width can be according to the power of the spacing between a LED and the 2nd LED, a LED and the power determinations of the 2nd LED.In the practical application, also can method by experiment determine length and the width of open slot, so that in the situation that satisfy the total light flux value, temperature rise maintains in the rational regional extent.
Step 402 evenly encapsulates a LED, is contained among the PCB of horizontal positioned;
Wherein, the quantity of a LED is a plurality of, and the power of each LED is identical.
Step 403 evenly encapsulates the 2nd LED, is contained among the PCB of horizontal positioned, and the power of a LED and luminous flux are greater than power and the luminous flux of the 2nd LED;
Wherein, the quantity of the 2nd LED is a plurality of, and the power of each the 2nd LED is identical.
In this step, the mode of a LED and the 2nd LED cross arrangement on PCB can be that each LED sequentially intersects with each the 2nd LED; Also can be that a plurality of LED sequentially intersect with the 2nd LED; Also can be that a plurality of LED sequentially intersect with a plurality of the 2nd LED.Certainly, in the practical application, also can adopt the cross arrangement of alternate manner.
Preferably, the method further comprises:
At a LED and the 2nd LED both sides jump ring is set in advance, establish for the fixing bayonet socket of jump ring both sides in the PCB202 of an accommodating LED201 and the 2nd LED203.
In this step, by jump ring is embedded in the bayonet socket, can be so that corresponding LED be fixed in the hole open slot among the PCB202 of an accommodating LED201 and the 2nd LED203, like this, when LED damages, can from the hole of accommodating LED, take out to change and get final product, make things convenient for the replacing of LED and structure comparatively simple.
The below comes backlight module lamp bar of the present invention is described again with instantiation.
The corresponding temperature rise threshold value of desired general power of supposing backlight module lamp bar is 70 degree, and the luminance index that needed total light flux determines requires to reach at least 330 nits (nit).Obviously, selected Light-Emitting Diode need to guarantee to guarantee when brightness is not less than 330 nits that temperature rise is no more than 70 degree.In the difference of following each example realizes, identical drive current is used in the driving of LED light emitting diode.
Take 40 cun backlight module lamp bars as example, LED lamp strip adoption is of the prior art evenly distributed:
If the LED lamp bar of row 0.4w, the quantity of the LED lamp bar of arrangement is 56, and the power sum of each LED lamp bar is 22.4w, and corresponding temperature rise is 40 degree; The luminous flux sum of each LED lamp bar is 34lm, and corresponding brightness is 240nit, thereby, satisfy the temperature rise index request, but do not satisfy the luminance index requirement;
If the LED lamp bar of row 1w, the quantity of the LED lamp bar of arrangement is 56, and the power sum of each LED lamp bar is 56w, and corresponding temperature rise is 80 degree; The luminous flux sum of each LED lamp bar is 78lm, and corresponding brightness is 420nit, thereby, satisfy the luminance index requirement, do not satisfy the temperature rise index request;
If the LED lamp bar of row 0.6w, the quantity of the LED lamp bar of arrangement is 56, and the power sum of each LED lamp bar is 33.6w, and corresponding temperature rise is 50 degree; The luminous flux sum of each LED lamp bar is 58lm, and corresponding brightness is 298nit, thereby, satisfy the temperature rise index request, do not satisfy the luminance index requirement;
And according to technical scheme of the present invention, be approximated to linear relationship according to power and temperature rise, be directly proportional with the brightness characteristics of linear relationship of luminous flux are selected the LED of 28 0.6w and the LED of 28 1w, and the LED lamp bar of 0.6w and the LED lamp bar of 1w are carried out uniformly-spaced alternative arrangement.At this moment, the total quantity of the LED lamp bar of arrangement still is 56, can satisfy the installing space of PCB, and the power sum of each LED lamp bar is 44.8w, and corresponding temperature rise is 64 degree; The luminous flux sum of each LED lamp bar is 64lm, and corresponding brightness is 340nit, requires and the luminance index requirement thereby satisfied the temperature rise threshold value.
According to the present invention, can also choose three kinds of different types of light emitting diodes.For example, select the LED of 18 0.4w, the LED of the LED of 19 0.6w and 19 1w, and the LED lamp bar of 0.4w, the LED lamp bar of 0.6w and the LED lamp bar of 1w carried out uniformly-spaced alternative arrangement successively.At this moment, the total quantity of the LED lamp bar of arrangement still is 56, can satisfy the installing space of PCB, and the power sum of each LED lamp bar is 37.6w, and corresponding temperature rise is 60 degree; The luminous flux sum of each LED lamp bar is 62lm, and corresponding brightness is 330nit, requires and the luminance index requirement thereby satisfied the temperature rise threshold value.
Again for example, take 32 cun backlight module lamp bars as example, LED lamp strip adoption is existing evenly distributed,
If the LED lamp bar of row 0.4w, the quantity of the LED lamp bar of arrangement is 30, and the power sum of each LED lamp bar is 12w, and corresponding temperature rise is 37 degree; The luminous flux sum of each LED lamp bar is 34lm, and corresponding brightness is 180nit, thereby, satisfy the temperature rise index request, do not satisfy the luminance index requirement;
If the LED lamp bar of row 1w, the quantity of the LED lamp bar of arrangement is 30, and the power sum of each LED lamp bar is 30w, and corresponding temperature rise is 78 degree; The luminous flux sum of each LED lamp bar is 78lm, and corresponding brightness is 430nit, thereby, satisfy the luminance index requirement, do not satisfy the temperature rise index request;
If the LED lamp bar of row 0.6w, the quantity of the LED lamp bar of arrangement is 30, and the power sum of each LED lamp bar is 18w, and corresponding temperature rise is 43 degree; The luminous flux sum of each LED lamp bar is 58lm, and corresponding brightness is 310nit, thereby, satisfy the temperature rise index request, do not satisfy the luminance index requirement;
Adopt the embodiment of the invention, according to required brightness and the requirement of temperature rise threshold value, namely according to required total light flux and general power requirement, consider the actual spatial accommodation of backlight module lamp bar, select the LED lamp bar of 15 0.6w and the LED lamp bar of 15 1w, and the LED lamp bar of 0.6w and the LED lamp bar of 1w are carried out the interval alternative arrangement.At this moment, the total quantity of the LED lamp bar of arrangement is 30, still satisfies the requirements of installation space of PCB; The power sum of each LED lamp bar is 24w, and corresponding temperature rise is 62.4 degree; The luminous flux sum of each LED lamp bar is 62lm, and corresponding brightness is 344nit, satisfies the temperature rise threshold value and requires and the luminance index requirement.
According to the present invention, can also choose three kinds of different types of light emitting diodes.For example, select the LED of 10 0.4w, the LED of the LED of 10 0.6w and 10 1w, and the LED lamp bar of 0.4w, the LED lamp bar of 0.6w and the LED lamp bar of 1w carried out uniformly-spaced alternative arrangement successively.At this moment, the total quantity of the LED lamp bar of arrangement still is 30, can satisfy the installing space of PCB, and the power sum of each LED lamp bar is 20w, and corresponding temperature rise is 56 degree; The luminous flux sum of each LED lamp bar is 59lm, and corresponding brightness is 331nit, satisfies the requirement of temperature rise threshold value and meets simultaneously the luminance index requirement.
The backlight module lamp bar that utilizes the embodiment of the invention to provide reaches the light-emitting diode arrangement method based on backlight module lamp bar, can obtain following technique effect:
1, the present invention adopts the combination of the LED light emitting diode of different capacity, and the design of multiple backlight module lamp bar can be provided, and can design the distinctiveness product of different brightness and temperature rise demand;
2, the present invention adopts the combination of the LED light emitting diode of different capacity, solved backlight module lamp bar of the prior art all adopt in during the power LED light emitting diode, the problem that brightness does not meet design requirement improves display brightness, optimizes display effect;
3, the present invention adopts the combination of the LED light emitting diode of different capacity, when having solved backlight module lamp bar of the prior art and all adopting the high-capacity LED light emitting diode, temperature rise is too high not to meet design requirement and reduces lamp bar temperature, prolongs the LED lamp bar problem in service life;
4, the present invention adopts the combination of the LED light emitting diode of different capacity, and when having solved backlight module lamp bar of the prior art and all adopting the high-capacity LED light emitting diode, excess Temperature can bring the LED deflection efficiency to reduce, and produces the problems such as a black speck.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also comprises these changes and modification interior.
Claims (10)
1. a backlight module lamp bar is characterized in that, this backlight module lamp bar comprises: printed circuit board (PCB), at least two kinds of different types of light emitting diodes, and described at least two kinds of different types of light emitting diodes have different luminous fluxes and power, wherein,
Described at least two kinds of different types of light emitting diodes alternately arrange at described printed circuit board (PCB),
The summation of the luminous flux of described at least two kinds of different types of light emitting diodes and the summation of power equal respectively needed total light flux and general power.
2. backlight module lamp bar according to claim 1 is characterized in that,
Described two kinds of different types of light emitting diodes comprise the first light emitting diode and the second light emitting diode, and the luminous flux of the first light emitting diode and power are greater than luminous flux and the power of the second light emitting diode;
Offer corresponding with the second light emitting diode up and down penetrating open slot on the described printed circuit board (PCB), the center of open slot and the second light emitting diode be centered close to the same face.
3. backlight module lamp bar according to claim 2 is characterized in that,
The first light emitting diode and the second light emitting diode evenly encapsulate respectively, are contained in the described printed circuit board (PCB) of horizontal positioned.
4. backlight module lamp bar according to claim 3 is characterized in that, further comprises:
At the first light emitting diode and the second light emitting diode both sides jump ring is set, is provided for the bayonet socket of fixing described jump ring in the printed circuit board (PCB) both sides of accommodating the first light emitting diode and the second light emitting diode.
5. backlight module lamp bar according to claim 4 is characterized in that, the quantity of the first light emitting diode or the second light emitting diode is one or more.
6. light-emitting diode arrangement method based on backlight module lamp bar, described backlight module lamp bar comprises: printed circuit board (PCB), at least two kinds of different types of light emitting diodes, the method comprises:
Based on required total light flux and the general power of described backlight module lamp bar, select at least two kinds of variety classes light emitting diodes corresponding to different luminous fluxes and power, the summation of the luminous flux of at least two kinds of different types of light emitting diodes and power summation equal respectively required total light flux and general power;
Described at least two kinds of different types of light emitting diodes are arranged alternately on printed circuit board (PCB).
7. method according to claim 6, wherein,
Described two kinds of different types of light emitting diodes comprise the first light emitting diode and the second light emitting diode;
The first light emitting diode is evenly encapsulated, is contained in the printed circuit board (PCB) of horizontal positioned;
The second light emitting diode is evenly encapsulated, is contained in the printed circuit board (PCB) of horizontal positioned.
8. method according to claim 7, wherein,
The luminous flux of described the first light emitting diode and power are greater than luminous flux and the power of the second light emitting diode;
Offer corresponding with the second light emitting diode up and down penetrating open slot at described printed circuit board (PCB), the center of open slot and the second light emitting diode be centered close to the same face.
9. method according to claim 8 further comprises:
At the first light emitting diode and the second light emitting diode both sides jump ring is set in advance, establishes the bayonet socket for described fixedly jump ring in the printed circuit board (PCB) both sides of accommodating the first light emitting diode and the second light emitting diode.
10. method according to claim 9, wherein, the mode of described cross arrangement comprises: each first light emitting diode sequentially intersects with each second light emitting diode, a plurality of the first light emitting diode sequentially intersects with second light emitting diode, first light emitting diode sequentially intersects with a plurality of the second light emitting diodes and a plurality of the first light emitting diode sequentially intersects with a plurality of the second light emitting diodes.
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| CN201310023660.7A CN103062668B (en) | 2012-08-29 | 2013-01-22 | Backlight unit lamp strip and method for arranging LEDs on basis of backlight unit lamp strip |
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| CN2012104516547 | 2012-11-12 | ||
| CN201310023660.7A CN103062668B (en) | 2012-08-29 | 2013-01-22 | Backlight unit lamp strip and method for arranging LEDs on basis of backlight unit lamp strip |
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| CN103062668B (en) | 2015-05-20 |
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