CN201053588Y

CN201053588Y - LED light source with LED arranged in specific style

Info

Publication number: CN201053588Y
Application number: CNU200620049660XU
Authority: CN
Inventors: 栾新源
Original assignee: Individual
Current assignee: SUZHOU TIANLU PHOTOELECTRIC TECHNOLOGY Co Ltd
Priority date: 2006-12-26
Filing date: 2006-12-26
Publication date: 2008-04-30
Anticipated expiration: 2016-12-26

Abstract

The utility model relates to an LED light source for arraying LEDs with different electro-optical characteristics by a special mode. LEDs with different electro-optical characteristics are arrayed on a light source plate by a mixed fitting mode; therefore, the utility model can not only develop the selective interval of LED and reduce the cost of the whole light source plate, but also achieve the effect of total even brightness.

Description

A kind of led light source of arranging LED with particular form

Technical field

The utility model relates to a kind of led light source, relates in particular to a kind of led light source of arranging the LED of different electro-optical characteristics with particular form.

Background technology

At present the scientific and technological information product all develops towards light, thin, short, little target, and traditional display mode such as CRT crt display etc. are limited by factors such as the excessive or power consumption of volume is very huge, are not easy to carry and carry, and are difficult to satisfy user's actual demand.And the development of lcd technology just in time suits the trend of present information products, no matter is little, or the advantage such as zero radiation of right angle demonstration, low power consumption, volume, can both allow the user enjoy best visual environment.

LCD is to be basic module with the liquid crystal material, provide a kind of light source by the backlight that is positioned at its behind or side in the general electronic products, the light that this light source sends passes display floater, utilize the photoelectric effect of liquid crystal, Control of Voltage by the outside, see through the refracting characteristic of liquid crystal molecule again, and the image that the rotatory power of light is obtained different brightness.

For example in the image display material of LCD, backlight is positioned at the back of LCD panel, optical module and supports such as light source, LGP, astigmatism plate, diffusion sheet have generally been comprised, wherein, many light sources are formed array, and its light that sends is transmitted to diffusion sheet by diffuser plate or LGP, and light arrives prismatic lens through behind the diffusion sheet, reach liquid crystal board by prismatic lens again, make LCD represent graph image.

For example in image display material such as mobile phone display screen, backlight is positioned at the side (both sides or all around) of LCD panel, it comprises optical module and supports such as light source, LGP, diffusion sheet, and wherein, light source is made up of a plurality of illuminators of lining up a line, be referred to as line source, the light that light source sends is transmitted into diffusion sheet through after the reflection of LGP, through behind the diffusion sheet, arrive liquid crystal board again via prismatic lens, make LCD represent graph image.

Traditional LCD backlight adopts cold-cathode lamp (CCFL) as light source, but along with the high image qualityization of backlight development and the demand for development of cost degradation, CCFL is difficult to meet the demands comprehensively, and the advantage of LED is that color reducibility is good, and the life-span is long, not mercurous than environmental protection, drive simply, response speed is fast, and environmental suitability is wide, LED became the up-and-coming youngster in recent years, became the key content of backlight research and development.

Referring to Fig. 1, this is the schematic diagram of the source plate of being made up of the LED of high conformity backlight of the prior art, and wherein, the LED of all high conformities is arranged in matrix on source plate backlight.

Such source plate backlight is used for liquid crystal display or when illumination and since each LED luminous evenly and brightness high, then the illumination effect of this backlight should be uniform.

In liquid crystal display, if LED is the behind that is positioned over liquid crystal panel,, perhaps carry out mixed light by diffuser plate and diffusion sheet by LGP and diffusion sheet, promptly light source has been carried out the soft and average processing of brightness, so just provide light source more uniformly for liquid crystal display.

If with LED is the side that is positioned over liquid crystal panel, then can utilize LGP and diffusion sheet to carry out mixed light and handle, so just provide light source more uniformly for liquid crystal display.

But, the LED consistency of product is relatively poor, the electro-optical characteristic of a collection of LED product generally is Gaussian distribution, wherein the LED proportion of luminous unanimity is less, if only choose an electro-optical characteristic part preferably, price is just somewhat expensive, so the LED-backlit source is more expensive slightly than CCFL at present, expensive several times than CCFL backlight in LED-backlit source on large scale liquid crystal display, the LCD TV is so the workout cost problem becomes the current thing that urgently will do.

Not only there is such problem in backlight, and in other field that LED uses, and for example is used to the light source that throws light on etc., also has such problem such as cost, brightness uniformity.

The utility model content

The purpose of this utility model is to provide a kind of method of LED permutation and combination, by adopting the mode of the LED mix and match that electro-optical characteristic is different, widen the selection interval of LED, reduce the LED cost, adopted special arrangement mode also can make led light source reach effect same as the prior art simultaneously.

According to an aspect of the present utility model, a kind of led light source device is provided, it comprises the inconsistent LED of a plurality of electro-optical characteristics, wherein, the inconsistent LED of described a plurality of electro-optical characteristic arranges by certain positional relationship, with the non-uniform light of reduction by the inconsistent described led light source device that is caused of the electro-optical characteristic of described a plurality of LED.

Preferably, it is capable that described led light source device comprises one or more first kind LED that is made up of the inconsistent LED of described a plurality of electro-optical characteristics, wherein, in described first kind LED is capable, LED and each or every relatively poor LED of a plurality of continuously arranged electro-optical characteristics arrangement that hockets preferably of each or every a plurality of continuously arranged electro-optical characteristics.

Preferably, in the described led light source device, in comprising the capable led array of described LED, comprise a plurality of one or more first kind LED row, wherein, in described each first kind LED row, LED and each or every relatively poor LED of a plurality of continuously arranged electro-optical characteristics arrangement that hockets preferably of each or every a plurality of continuously arranged electro-optical characteristics.

Compared with prior art, the utlity model has following advantage:

(1) the utility model has used the different LED of electro-optical characteristic simultaneously, and the LED that electro-optical characteristic is different alternately arranges to form LED line source or area source, makes total luminous effect of uniform that reaches of light source;

(2) owing to the price comparison of the relatively poor LED of electro-optical characteristic is cheap, in led light source, use the better and relatively poor LED of electro-optical characteristic of electro-optical characteristic simultaneously, so just make the totle drilling cost of led light source descend.

Description of drawings

By reading the detailed description of doing with reference to the following drawings that non-limiting example is done, it is more obvious that other features, objects and advantages of the present utility model will become:

Fig. 1 is the schematic diagram of the source plate of being made up of the LED of brightness height, high conformity backlight of the prior art;

Fig. 2 is according to an embodiment of the present utility model, the schematic diagram of the light source board of forming by the LED of two kinds of different brightness, wherein, at each row or respectively list single light characteristic LED and the relatively poor alternately arrangement of LED of single light characteristic preferably;

Fig. 3 is according to another embodiment of the present utility model, the schematic diagram of the light source board of forming by the LED of two kinds of different brightness, and wherein, every provisional capital is made up of the inconsistent LED of a plurality of brightness;

Fig. 4 is according to another embodiment of the present utility model, the schematic diagram of the light source board of forming by the LED of two kinds of different brightness, and wherein aligning method of each row is with 5 behavior cycles.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

In the description of following embodiment, light characteristic LED preferably is meant under specified conditions, the LED of luminosity in the certain numerical value scope, the relatively poor LED of light characteristic is meant under same condition, and the LED of luminosity outside above-mentioned number range for example, is benchmark with the average canbdle power of a collection of LED under the situation of the certain electric current of input, the deviation of luminous intensity belongs to light characteristic LED preferably 10% with interior LED, otherwise just belongs to the relatively poor LED of light characteristic.

Fig. 2 is according to an embodiment of the present utility model, the schematic diagram of the light source board of forming by the LED of two kinds of different brightness, wherein, at each row or respectively list single light characteristic LED and the relatively poor alternately arrangement of LED of single light characteristic preferably.

Among Fig. 2, in first row of light source board 2, LED201, LED203, LED205 etc. are light characteristic LED preferably, and LED202, LED204, LED206 etc. are the relatively poor LED of light characteristic, and the LED that the remainder of this row also is better by light characteristic and light characteristic is relatively poor alternately arranges and forms; In second row, LED212, LED214, LED216 etc. are light characteristic LED preferably, LED211, LED213, LED215 etc. are the relatively poor LED of light characteristic, and the LED that the remainder of this row also is better by light characteristic and light characteristic is relatively poor alternately arranges and forms; In the third line of source plate 2 backlight, LED221, LED223, LED225 etc. are light characteristic LED preferably, LED222, LED224, LED226 etc. are the relatively poor LED of light characteristic, and the LED that the remainder of this row also is better by light characteristic and light characteristic is relatively poor alternately arranges and forms.

Simultaneously, in each row of this led array, also can see such arrangement regulation, promptly each row all is alternately to be arranged by the relatively poor LED of the better and single light characteristic of single light characteristic to form.

Fig. 3 is according to another embodiment of the present utility model, the schematic diagram of the light source board of forming by the LED of two kinds of different brightness, and wherein, every provisional capital is made up of the inconsistent LED of a plurality of brightness.

For convenience, our definition by one or more continuously arranged light characteristics preferably LED forms be grouped into LED grouping, also define the 2nd LED that is grouped into that forms by the relatively poor LED of one or more continuously arranged light characteristics and divide into groups.

During each LED in the present embodiment was capable, LED grouping was alternately arranged with the 2nd LED grouping.For example in first row in Fig. 3, LED 301, LED 304 are light characteristic LED preferably, and the two constitutes one the one LED grouping respectively; And LED 302, LED 303, LED 305, LED 306 etc. are the relatively poor LED of light characteristic, and LED 302 wherein and LED303 constitute the 2nd LED grouping, and LED 305 and LED 306 constitute the 2nd LED grouping.As can be seen from the figure, LED grouping is alternately to arrange with the 2nd LED grouping, and other LED among Fig. 3 is capable also to be the situation that belongs to such.

For convenience of description, it is capable that we will be called first kind of LED by the LED of delegation that above-mentioned LED grouping and above-mentioned the 2nd LED grouping alternately are arranged in, and will be called first kind of LED row by the row LED that above-mentioned LED grouping and above-mentioned the 2nd LED grouping alternately are arranged in; And it is capable to be called second kind of LED by better (or relatively poor) LED of delegation that LED formed of a plurality of light characteristics, will be called second kind of LED row by a plurality of light characteristics better (or relatively poor) row LED that LED formed.

Referring to Fig. 3, according to an embodiment of the present utility model, a plurality of above-mentioned first kind of LED are capable for parallel arranged, can form a led array, thereby constitute an area source.Preferably, the row of each in such led array also are to be divided into groups alternately to arrange and constitute with above-mentioned the 2nd LED by above-mentioned LED grouping.

Preferably, by above-mentioned first kind of LED capable can composition according to a line source of the present utility model, such light source adopts by alternately arranging above-mentioned LED grouping and reaches luminous effect of uniform with above-mentioned the 2nd LED grouping.

According to an embodiment of the present utility model, it is capable periodically to arrange LED, can utilize the light source of the LED acquisition uniformly light-emitting of different brightness.

Referring to Fig. 3, each cycle of supposing the LED matrix is that N is capable, and capable and N-M second kind of LED is capable comprising first kind LED of M, N is the positive integer greater than 2, and M is more than or equal to 1 and smaller or equal to the positive integer of N.

In the present embodiment, first and N capable to be first kind of above-mentioned LED capable, wherein said first and N capable in light characteristic preferably LED be arranged on same listing, and the relatively poor LED of light characteristic is arranged on same listing, better or the relatively poor LED of each light characteristic in all the other N-M second kind of LED are capable all is arranged in same listing with LED different with its brightness in first and N of one-period is capable, and the different second kind of LED of brightness is capable replaces arrangement on column direction.

In the present embodiment, the LED matrix comprises the capable cycle of a plurality of N, forms a luminous uniform surface light source therefrom.

Among Fig. 4, LED 401, LED 403 in first row, LED 405 etc. are light characteristic LED preferably, LED 402, LED 404, LED 406 etc. are the relatively poor LED of light characteristic, the LED that the remainder of this row also is better by light characteristic and light characteristic is relatively poor alternately arranges and forms, LED 441 in the fifth line, LED 443, LED 445 etc. are light characteristic LED preferably, LED 442, LED 444, LED 446 etc. are the relatively poor LED of light characteristic, and the LED that the remainder of this row also is better by light characteristic and light characteristic is relatively poor alternately arranges and forms.The light characteristic light characteristic that LED is corresponding with fifth line preferably of first row LED preferably is in same listing, the relatively poor LED light characteristic relatively poor LED corresponding with fifth line of light characteristic of first row is in same listing, for example the LED 401 of the LED441 of the fifth line among Fig. 4 and first row is in same listing, the LED 403 of the LED 443 of fifth line and first row is in same listing, the LED 406 of the LED 446 of fifth line and first row is in same listing, or the like.

Second the row all by light characteristic preferably LED form, but quantity is identical with the relatively poor LED quantity of light characteristic in first row, and each LED of second row is arranged in the below of the relatively poor led light source of first light characteristic of going, the led light source relatively poor with the first corresponding light characteristic of going is in same listing, for example the LED 402 of the LED 412 of the row of second among the figure and first row is in same listing, the LED404 of the LED 414 of second row and first row is in same listing, the LED 406 of the LED 416 of second row and first row is in same listing, or the like.

The third line all is made up of the relatively poor LED of light characteristic, but LED quantity was identical preferably for light characteristic during quantity was capable with first, and each LED of this row is arranged in the light characteristic below of led light source preferably of the correspondence of first row, with first the row light characteristic preferably LED be in same listing, for example the LED 401 of the LED 421 of the third line among the figure and first row is in same listing, the LED 403 of the LED 423 of the third line and first row is in same listing, the LED 405 of the LED 425 of the third line and first row is in same listing, or the like.

Fourth line all by light characteristic preferably LED form, but the relatively poor LED quantity of light characteristic is identical in quantity and the fifth line, and each LED of this row is arranged in the top of the relatively poor led light source of the light characteristic of correspondence of first row, the led light source relatively poor with the light characteristic of corresponding fifth line is in same listing, for example the LED 442 of the LED432 of the fourth line among the figure and fifth line is in same listing, the LED 434 of fourth line and the LED 444 of fifth line are in same listing, the LED 426 of fourth line and the LED 446 of fifth line are in same listing, or the like.

Referring to Fig. 4, according to another embodiment of the present utility model, the arrangement mode of LED is similar to Fig. 4, just all change the relatively poor LED of light characteristic wherein into light characteristic LED preferably, light characteristic that simultaneously will be wherein LED preferably all changes the relatively poor LED of light characteristic into, so also can reach identical effect.

More than described the resulting light source board of employing the utility model, this light source board can be used as Backlight For Liquid Crystal Display Panels, also can be used as illuminating source.

Those skilled in the art is to be understood that, to adopt resulting LED of above-mentioned embodiment capable (or row) or matrix to revolve turn 90 degrees, also can obtain a kind of new LED capable (or row) or matrix, its effect is also preceding identical with rotation, and the embodiment that obtains like this belongs to of the present utility model.

Those skilled in the art it should also be understood that, the arrangement mode of LED is not limited to above-mentioned several embodiment, light characteristic arrangement and the packet mode of the relatively poor LED of LED and light characteristic preferably has a variety of, but all follow a common principle: no matter be laterally or vertically, the relatively poor LED grouping of light characteristic LED grouping preferably and light characteristic is alternately arranged.

In the above embodiment, adopt brightness to distinguish two kinds of different LED, certainly, can also adopt other feature, electro-optical characteristics such as for example colour saturation characteristic, voltage-current characteristic are to distinguish the different LED of two classes, correspondingly, in this article, we will be formed row by the better and relatively poor LED of described a plurality of electro-optical characteristics, and to be called first kind LED capable, capable with being called the second class LED by the better or relatively poor row that LED formed of a plurality of electro-optical characteristics entirely.

If according to being similar to above-mentioned embodiment, according to such as electro-optical characteristics such as colour saturation characteristic, voltage-current characteristics, distinguish better with the relatively poor different LED of two classes of electro-optical characteristic, and arrange LED, also can reach identical effect according to identical mode.

More than specific embodiment of the utility model is described.It will be appreciated that the utility model is not limited to above-mentioned specific implementations, those skilled in the art can make various distortion or modification within the scope of the appended claims.

Claims

1. led light source device, it comprises the inconsistent LED of a plurality of electro-optical characteristics, it is characterized in that, the inconsistent LED of described a plurality of electro-optical characteristic arranges by certain positional relationship, with the non-uniform light of reduction by the inconsistent described led light source device that is caused of the electro-optical characteristic of described a plurality of LED.

2. led light source device according to claim 1, wherein, it is capable to comprise the one or more first kind LED that are made up of the inconsistent LED of described a plurality of electro-optical characteristics, wherein, in described first kind LED is capable, LED and each or every relatively poor LED of a plurality of continuously arranged electro-optical characteristics arrangement that hockets preferably of each or every a plurality of continuously arranged electro-optical characteristics.

3. led light source device according to claim 2, wherein, in comprising the capable led array of described LED, comprise a plurality of one or more first kind LED row, wherein, in described each first kind LED row, LED and each or every relatively poor LED of a plurality of continuously arranged electro-optical characteristics arrangement that hockets preferably of each or every a plurality of continuously arranged electro-optical characteristics.

4. according to claim 2 or 3 described led light source devices, wherein, it is capable also to comprise one or more second class LED, described each second class LED capable entirely by a plurality of electro-optical characteristics better or relatively poor LED formed, wherein, the capable arrangement that hockets of the capable and described one or more second class LED of described one or more first kind LED.

5. led light source device according to claim 4, wherein, a plurality of LED that described led array is arranged with N behavior loop cycle are capable, and N is the positive integer more than or equal to 2.

6. led light source device according to claim 5, wherein, first kind LED is capable and N-M the second class LED is capable to comprise M in the N in described each cycle of composition is capable, and wherein, M is more than or equal to 1 and smaller or equal to the positive integer of N.

7. led light source device according to claim 6, wherein, N is more than or equal to 3,

Wherein, in the N in described each cycle of composition is capable, first and N capable all for by single electro-optical characteristic preferably the relatively poor LED of LED and single electro-optical characteristic alternately to arrange the first kind LED that forms capable, wherein said first and N capable in electro-optical characteristic preferably LED be arranged on same listing, and the relatively poor LED of electro-optical characteristic is arranged on same listing.

8. led light source device according to claim 7, wherein, the better or relatively poor LED of each electro-optical characteristic in all the other N-M second class LED are capable all with described first and N in capable the LED different with its electro-optical characteristic be arranged in same listing.

9. led light source device according to claim 8, wherein, N is 5,

Wherein, described second and fourth line all for capable by described a plurality of electro-optical characteristics second class LED that LED formed preferably, described second and fourth line in a plurality of electro-optical characteristics preferably LED respectively with described first and fifth line in the relatively poor LED of electro-optical characteristic be arranged in same listing;

Wherein, described the third line is for capable by the relatively poor second class LED that LED formed of described a plurality of electro-optical characteristics, the relatively poor LED of a plurality of electro-optical characteristics in described the third line respectively with described first and fifth line in the relatively poor LED of electro-optical characteristic be arranged in same listing.

10. led light source device according to claim 8, wherein, N is 5,

Wherein, described second and fourth line all for capable by the relatively poor second class LED that LED formed of described a plurality of electro-optical characteristics, described second and fourth line in the relatively poor LED of a plurality of electro-optical characteristics respectively with described first and fifth line in electro-optical characteristic preferably LED be arranged in same listing;

Wherein, described the third line is for capable by described a plurality of electro-optical characteristics second class LED that LED formed preferably, a plurality of electro-optical characteristics in described the third line preferably LED respectively with described first and fifth line in the relatively poor LED of electro-optical characteristic be arranged in same listing.

11. led light source device according to claim 3, wherein, described electro-optical characteristic LED preferably is the LED of its electro-optical characteristic in the predetermined value scope.

12. led light source device according to claim 3, wherein, the relatively poor LED of described electro-optical characteristic is that its electro-optical characteristic is at the extraneous LED of predetermined value.

13. according to claim 11 or 12 described led light source devices, wherein, described predetermined value scope is and the deviation of the mean value of the electro-optical characteristic of a collection of LED number range less than a predetermined value.

14. according to each described led light source device in the claim 1 to 3, wherein, described electro-optical characteristic comprises in the light characteristic, colour saturation characteristic, voltage-current characteristic of LED each or appoints multinomial.