CN101782218B - Light guide plate, backlight module and light transmission method - Google Patents
Light guide plate, backlight module and light transmission method Download PDFInfo
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- CN101782218B CN101782218B CN2010101144420A CN201010114442A CN101782218B CN 101782218 B CN101782218 B CN 101782218B CN 2010101144420 A CN2010101144420 A CN 2010101144420A CN 201010114442 A CN201010114442 A CN 201010114442A CN 101782218 B CN101782218 B CN 101782218B
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Abstract
The invention relates to a light guide plate, a backlight module and a light transmission method. The light guide plate is provided with an upper surface, a lower surface and a plurality of light guide zones, each light guide zone is provided with a first edge and a second edge which are adjacent to each other, the first edges are provided with light sources for providing light incident upon the light guide plate, and the transmission direction of the light is parallel to the extension direction of the second edges. The light guide plate also comprises a plurality of strip-shaped bulges which are arranged at least one of the upper surface and the lower surface of the light guide plate along the extension direction of the second edge; and the light can be transmitted in the strip-shaped bulges. The invention has the advantage of eliminating bright rays generated between two spliced light guide plates.
Description
Technical field
The present invention relates to a kind of module backlight, the light transmission method that relates in particular to the structure of LGP in this module backlight and use this LGP.
Background technology
LCD comprises display panels and module backlight.Along with light, the thin development trend of LCD, gradually adopted the lateral incident type backlight module of thinner thickness, it roughly is that (Light Emitting Diode LED) forms with LGP by light-emittingdiode.
LGP is the quite high optical element of optical accuracy.Be transformed into uniform surface light source via LGP in order to make from the line source of light-emittingdiode outgoing, thus usually the light scattering pattern can be set at the exiting surface of LGP, and this light scattering pattern is the continually varying form.
Yet, when the demand of a plurality of LGPs of splicing, (for example, the LGP of a plurality of small sizes is spliced and combined into a large-area LGP, to be applied in the large scale liquid crystal display; Perhaps; Need the subregion illumination and splice a plurality of LGPs, different LGPs can carry out leaded light separately), if with a plurality of LGPs splice up and down or about when splicing; The joint of two adjacent LGPs will produce extremely significantly bright line because light source influences each other.
Fig. 1 is the schematic top plan view of spliced LGP of the prior art and along the energy diagram of the area source of directions X.Please with reference to Fig. 1; Because the light scattering pattern (not illustrating) of LGP is a continually varying; So when a plurality of LGPs 100 of splicing when (illustrating three among Fig. 1), the jointing positions G (among Fig. 1, representing) of LGP 100 with thick line produce discontinuous; Make that the energy of area source of jointing positions G is outstanding especially, and produce obvious bright line B.So, can reduce the uniformity of the area source that spliced LGP 100 provided.
Summary of the invention
The technical issues that need to address of the present invention have provided a kind of LGP, are intended to solve the above problems;
The present invention also provides the module backlight that adopts above-mentioned light conducting plate structure;
The present invention also provides the light that adopts above-mentioned light conducting plate structure transmission method.
In order to solve the problems of the technologies described above, the present invention realizes through following technical scheme:
LGP of the present invention has a upper surface and a lower surface; This LGP has a plurality of leaded lights zone; Each leaded light zone has one first limit adjacent one another are and one second limit; Be provided with a light source at place, this first limit and this light source provides a light to incide in this LGP; The transmission direction of this light is parallel with the bearing of trend on this second limit, and this LGP also comprises: a plurality of strip projected parts things, along the bearing of trend on this second limit and this upper surface and this lower surface that are arranged on this LGP at least one of them; And this light can transmit in strip-shaped bulges, wherein, said a plurality of strip projected parts thing is set in said each leaded light zone, between two adjacent leaded light zones, is provided with a groove;
Module backlight of the present invention comprises: a LGP, have a upper surface and a lower surface, and this LGP has a plurality of leaded lights zone, and each leaded light zone has one first limit adjacent one another are and one second limit; This LGP also comprises: a plurality of strip projected parts things, along the bearing of trend on this second limit and this upper surface and this lower surface that are arranged on this LGP at least one of them; An and light source; Be arranged on this place, first limit, this light source provides a light to incide in this LGP, and the transmission direction of this light is parallel with the bearing of trend on this second limit; This light can be transmitted in strip-shaped bulges; Wherein, said a plurality of strip projected parts thing is set in said each leaded light zone, between two adjacent leaded light zones, is provided with a groove;
Light transmission method of the present invention is realized through following steps:
Adopt a LGP in order to eliminate the bright line that produces between adjacent two leaded light zones; Wherein, This LGP has a upper surface and a lower surface; Each leaded light zone has one first limit adjacent one another are and one second limit; Be provided with a light source at place, this first limit and this light source provides a light to incide in this LGP, the transmission direction of this light is parallel with the bearing of trend on this second limit;
Bearing of trend along this second limit of this LGP; This upper surface and this lower surface at this LGP are provided with a plurality of strip projected parts things on one of them at least; This light can be transmitted in strip-shaped bulges; Wherein, said a plurality of strip projected parts thing is set in said each leaded light zone, between two adjacent leaded light zones, is provided with a groove.
Compared with prior art, the invention has the beneficial effects as follows: can eliminate the bright line that is produced between two LGPs of splicing.
Description of drawings
Fig. 1 is the schematic top plan view of spliced LGP of the prior art and along the energy diagram of the area source of directions X.
Fig. 2 is the sketch map of a kind of LGP of preferred embodiment of the present invention.
Fig. 3 A and Fig. 3 B are the side schematic view of the connecting method of two kinds of LGPs of preferred embodiment of the present invention.
Fig. 4 is for the schematic top plan view of the LGP of preferred embodiment of the present invention and along the energy diagram of the area source of directions X.
Fig. 5 A～Fig. 5 C is the sketch map of the section shape of three kinds of strip projected parts things of preferred embodiment of the present invention.
Fig. 6 is the sketch map of another LGP of preferred embodiment of the present invention.
Fig. 7 A～Fig. 7 C is the sketch map of the connected mode of three kinds of strip projected parts things of preferred embodiment of the present invention.
Fig. 8 A～Fig. 8 C is the sketch map of the height change mode of three kinds of strip projected parts things of preferred embodiment of the present invention.
Fig. 9 is the sketch map of a kind of module backlight of preferred embodiment of the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described in further detail:
The present invention provides a kind of LGP, has special optical texture and can eliminate the bright line that is produced between two LGPs of splicing.
The present invention provides a kind of module backlight, uses above-mentioned LGP, and uniform surface light source can be provided.
The present invention provides a kind of light transmission method, uses above-mentioned LGP, and uniform surface light source can be provided.
The present invention proposes a kind of LGP, has upper surface and lower surface.LGP has a plurality of leaded lights zone, and each leaded light zone has first limit adjacent one another are and second limit.Be provided with light source at first limit place and light source provides light to incide in the LGP.The transmission direction of light is parallel with the bearing of trend on second limit.This LGP comprises: a plurality of strip projected parts things, along the bearing of trend on second limit and the upper surface and the lower surface that are arranged on LGP at least one of them; And light can transmit in above-mentioned strip projected parts thing.
The present invention proposes a kind of module backlight again, comprising: LGP and light source.LGP has upper surface and lower surface.LGP has a plurality of leaded lights zone, and each leaded light zone has first limit adjacent one another are and second limit.LGP comprises a plurality of strip projected parts things, along the bearing of trend on second limit and the upper surface and the lower surface that are arranged on LGP at least one of them.Light source is arranged on place, first limit.This light source provides light to incide in the LGP.The transmission direction of light is parallel with the bearing of trend on second limit, and light can be transmitted in above-mentioned strip projected parts thing.
In one embodiment of this invention, above-mentioned LGP more comprises: the light scattering pattern is arranged on the strip projected parts thing.
In one embodiment of this invention, the density of above-mentioned light scattering pattern near light source is lower than the density away from the light scattering pattern of light source.
In one embodiment of this invention, utilize radium-shine, sandblast or etching mode forms the light scattering pattern on the strip projected parts thing.
In one embodiment of this invention, the section shape of each above-mentioned strip projected parts thing comprises: semicircle, quadrangle or triangle.
In one embodiment of this invention, above-mentioned strip projected parts thing for join continuously each other, etc. continuously join or do not wait continuous joining.
In one embodiment of this invention, the height of above-mentioned strip projected parts thing for be equal to each other, rule changes or irregular variation.
In one embodiment of this invention, above-mentionedly between two adjacent leaded light zones, be provided with a groove.
In one embodiment of this invention, above-mentionedly between two adjacent leaded light zones, be provided with a section.
In one embodiment of this invention, above-mentioned strip projected parts thing is arranged on this upper surface and this lower surface simultaneously.
The present invention reintroduces a kind of light transmission method; In order to the bright line that produces between adjacent two leaded light zones of eliminating LGP; Wherein, LGP has upper surface and lower surface, and each leaded light zone has first limit adjacent one another are and second limit; Be provided with light source at first limit place and light source provides light to incide in the LGP, the transmission direction of light is parallel with the bearing of trend on second limit.This light transmission method comprises: along the bearing of trend on second limit of LGP, on one of them a plurality of strip projected parts things are set at least at the upper surface and the lower surface of LGP, light can be transmitted in the strip projected parts thing.
Based on above-mentioned, LGP of the present invention has special optical texture (being the strip projected parts thing), can eliminate the obvious bright line of the jointing positions of a plurality of LGPs of splicing.In addition, can adopt proper optical design, the optical scattering pattern is set on the strip projected parts thing again according to demand; Perhaps, can change the spacing, height of strip projected parts thing etc., distribute and obtain needed area source.Use the module backlight and the light transmission method of above-mentioned LGP that uniform surface light source can be provided.
LGP of the present invention has special optical texture, so, when a plurality of LGP of splicing, can eliminate the obvious bright line of the jointing positions of LGP.Below, will enumerate several embodiment, and carry out detailed explanation for the present invention with reference to graphic.
Fig. 2 is the sketch map of a kind of LGP of preferred embodiment of the present invention.Please with reference to Fig. 2, LGP 200 has upper surface 200a and lower surface 200b.LGP 200 has a plurality of leaded lights zone 210, and each leaded light zone 210 has first limit 212 adjacent one another are and second limit 214.Be provided with light source S at 212 places, first limit and light source S provides light L to incide in the LGP 200.The transmission direction of light L is parallel with the bearing of trend on second limit 214.This LGP 200 comprises: a plurality of strip projected parts things 220, along the bearing of trend on second limit 214 and the upper surface 200a and the lower surface 200b that are arranged on LGP 200 at least one of them.Light L can transmit in above-mentioned strip projected parts thing 220.
In Fig. 2, be to represent strip projected parts thing 220 with the mode that amplify the part.In fact, the size of strip projected parts thing 220 is quite little, obviously identification of naked eyes, and a plurality of strip projected parts things 220 are distributed on the LGP 200.
Particularly, it may be noted that in Fig. 2, between adjacent two leaded lights zone 210, be provided with groove 230, this groove 230 one-body molded, mode that plastic cement penetrates capable of using directly marks off a plurality of leaded lights zone 210 on LGP 200.Each leaded light zone 210 can be carried out the subregion leaded light separately.As shown in Figure 2, after strip projected parts thing 220 is set, can eliminate the bright line that originally can take place at groove 230 places, follow-uply describe in detail again in Fig. 4.
Fig. 3 A and Fig. 3 B are the side schematic view of the connecting method of two kinds of LGPs of preferred embodiment of the present invention.Please, between two adjacent leaded light zones 210, be provided with groove 230 earlier with reference to Fig. 3 A.In other words, can each leaded light zone 210 be regarded as the LGP of a small size, form a large-area LGP 200 via the mode of one-body molded and delineation groove 230, and can carry out the subregion leaded light.
In addition, please with reference to Fig. 3 B, also can between two adjacent leaded light zones 210, be provided with section C.In other words, can each leaded light zone 210 be regarded as the LGP of a small size, form a large-area LGP 200 via the mode of splicing each other.Particularly, be that example is explained with Fig. 3 B, strip projected parts thing 220 can be arranged on upper surface 200a and lower surface 200b simultaneously; Certainly, strip projected parts thing 220 also can only be arranged on upper surface 200a, or only is arranged on lower surface 200b.
Fig. 4 is for the schematic top plan view of the LGP of preferred embodiment of the present invention and along the energy diagram of the area source of directions X.Please with reference to Fig. 4, when a plurality of LGP 200 of splicing, originally can produce obvious bright line at the jointing positions G of LGP 200.Yet, see through a plurality of strip projected parts things 220 are set, can make the energy of area source present uniform distribution.Fig. 1 more of the prior art can obviously know, the energy in the area source of jointing positions G among Fig. 4 can't be outstanding especially, and can eliminate visual obvious bright line.
Fig. 5 A～Fig. 5 C is the sketch map of the section shape of three kinds of strip projected parts things of preferred embodiment of the present invention.Please jointly with reference to Fig. 5 A～Fig. 5 C, the section shape of each strip projected parts thing 220 can be semicircle (shown in Fig. 5 A), quadrangle (shown in Fig. 5 B) or triangle (shown in Fig. 5 C).Certainly, can also be other suitable shapes.Can utilize die (not illustrating) that optical sheet is impressed, and make LGP 200 with strip projected parts thing 220.Corresponding to the section shape of the strip projected parts thing 200 of above-mentioned Fig. 5 A～Fig. 5 C, can make R ditch (corresponding to the semicircle of Fig. 5 A), square ditch (corresponding to the quadrangle of Fig. 5 B) and V ditch (corresponding to the triangle of Fig. 5 C) on the die.
Fig. 6 is the sketch map of another LGP of preferred embodiment of the present invention.Please with reference to Fig. 6, this LGP 202 is similar with the LGP 200 of Fig. 2, and components identical indicates with identical symbol.It should be noted that LGP 202 can more comprise: light scattering pattern 240 is arranged on the strip projected parts thing 220.Capable of using radium-shine, sandblast or etching mode etc., on strip projected parts thing 220, form light scattering pattern 240.And, can adjust the distribution density of the light scattering pattern 240 of diverse location, for example, can make near the distribution density of the light scattering pattern 240 of light source S lower than distribution density away from the light scattering pattern 240 of light source S.More detailed, away from the position of light source S, the attenuation degree of light L is big more more.Use the adjustment mode of the distribution density of above-mentioned light scattering pattern 240, can obtain higher light scattering effect in position to increase the light L brightness of outgoing away from light source S place; And can obtain lower light scattering effect near the position of light source S, bright excessively with the light L that avoids outgoing.Generally speaking, LGP 202 can obtain more uniform surface light source.
Similarly, in order to obtain the Energy distribution of required area source, can adjust the connected mode or the height of strip projected parts thing according to the optical design demand.Fig. 7 A～Fig. 7 C is the sketch map of the connected mode of three kinds of strip projected parts things of preferred embodiment of the present invention.Please earlier with reference to Fig. 7 A, a plurality of strip projected parts things 220 can be each other and join continuously.Please refer again to Fig. 7 B, a plurality of strip projected parts things 220 such as also can be at continuous joining, and wherein, the spacing between adjacent two strip projected parts things 220 is d1.Please refer again to Fig. 7 C, a plurality of strip projected parts things 220 not can be yet and wait continuous joining, and wherein, the spacing between adjacent two strip projected parts things 220 can be d1, d2, d3.
Fig. 8 A～Fig. 8 C is the sketch map of the height change mode of three kinds of strip projected parts things of preferred embodiment of the present invention.In Fig. 8 A～Fig. 8 C, describe with continuous modes of joining such as strip projected parts thing 220 are.In fact, the connected mode of strip projected parts thing 220 or highly can be according to optical design demand and making up.Please earlier with reference to Fig. 8 A, the height of a plurality of strip projected parts things 220 can be and is equal to each other, that is, highly be h1.Please refer again to Fig. 8 B, the height of a plurality of strip projected parts things 220 also can be rule to be changed, and wherein, the height h1 of strip projected parts thing 220, h2, h3 for example can be linear change.Please refer again to Fig. 8 C, the height of a plurality of strip projected parts things 220 also can be irregular variation, and wherein, the height h1 of strip projected parts thing 220, h2, h3 can be any variations.
Fig. 9 is the sketch map of a kind of module backlight of preferred embodiment of the present invention.Please with reference to Fig. 9, this module 300 backlight comprises: LGP 310 and light source S.LGP 310 can adopt above-mentioned LGP 200 or LGP 202.Detailed content about LGP 200 or LGP 202 does not repeat at this.In addition, light source S can adopt light-emittingdiode.Thus, even module backlight 300 uses spliced LGP 310, still can eliminate the bright line that jointing positions G is produced, and uniform surface light source FL is provided.
In addition, the present invention also proposes a kind of light transmission method.In one embodiment, this light transmission method uses above-mentioned LGP 200 or 202.Detailed content about LGP 200,202 does not repeat at this.The characteristics of this light transmission method are: along the bearing of trend on second limit 214 of LGP 200; Upper surface 200a and lower surface 200b at LGP 200 are provided with a plurality of strip projected parts things 220 on one of them at least, and light L can be transmitted in strip projected parts thing 220.Thus, can eliminate the bright line that when splicing a plurality of leaded lights zone 210 (can be considered the LGP of a plurality of small sizes), between adjacent two leaded lights zone 210 of LGP 200,202, produces.
In sum, LGP of the present invention, module backlight and light transmission method have the following advantages at least:
At LGP the strip projected parts thing is set, and the bearing of trend of strip projected parts thing is parallel with the transmission direction of light.So light can transmit in the strip projected parts thing, and can in LGP, form uniform Energy distribution.Thus, can eliminate the obvious bright line of the jointing positions of a plurality of LGPs of splicing.Also can adopt proper optical design, the optical scattering pattern is set on the strip projected parts thing again according to demand; Perhaps, can change the spacing, height of strip projected parts thing etc., distribute to obtain needed area source.In addition, use the module backlight of above-mentioned LGP and light transmission method that uniform surface light source can be provided.
Though the present invention discloses as above with embodiment; Right its is not in order to limit the present invention; Has common knowledge the knowledgeable in the technical field under any; In spirit that does not break away from the present invention and scope, change and retouching when doing some, so working as the scope of looking accompanying Claim, the present invention's protection domain is as the criterion.
Claims (16)
1. LGP; Have a upper surface and a lower surface; This LGP has a plurality of leaded lights zone; Each leaded light zone has one first limit adjacent one another are and one second limit, is provided with a light source at place, this first limit and this light source provides a light to incide in this LGP, and the transmission direction of this light is parallel with the bearing of trend on this second limit; It is characterized in that: this LGP also comprises: a plurality of strip projected parts things, along the bearing of trend on this second limit and this upper surface and this lower surface that are arranged on this LGP at least one of them; And this light can transmit in strip-shaped bulges, wherein, said a plurality of strip projected parts thing is set in said each leaded light zone,
Between two adjacent leaded light zones, be provided with a groove.
2. LGP according to claim 1 is characterized in that: more comprise: a light scattering pattern is arranged on the strip-shaped bulges.
3. LGP according to claim 2 is characterized in that: lower than the density away from this light scattering pattern of this light source near the density of this light scattering pattern of this light source.
4. LGP according to claim 2 is characterized in that: utilize radium-shine, sandblast or etching mode forms this light scattering pattern on strip-shaped bulges.
5. LGP according to claim 1 is characterized in that: the section shape of each strip projected parts thing comprises: semicircle, quadrangle or triangle.
6. LGP according to claim 1 is characterized in that: strip-shaped bulges for join continuously each other, etc. continuously join or do not wait continuous joining.
7. LGP according to claim 1 is characterized in that: the height of strip-shaped bulges for be equal to each other, rule changes or irregular variation.
8. LGP according to claim 1 is characterized in that: strip-shaped bulges is arranged on this upper surface and this lower surface simultaneously.
9. a module backlight comprises: a LGP, have a upper surface and a lower surface, and this LGP has a plurality of leaded lights zone, and each leaded light zone has one first limit adjacent one another are and one second limit; It is characterized in that: this LGP also comprises: a plurality of strip projected parts things, along the bearing of trend on this second limit and this upper surface and this lower surface that are arranged on this LGP at least one of them; An and light source; Be arranged on this place, first limit, this light source provides a light to incide in this LGP, and the transmission direction of this light is parallel with the bearing of trend on this second limit; This light can be transmitted in strip-shaped bulges; Wherein, said a plurality of strip projected parts thing is set in said each leaded light zone
Between two adjacent leaded light zones, be provided with a groove.
10. module backlight according to claim 9 is characterized in that: more comprise: a light scattering pattern is arranged on the strip-shaped bulges.
11. module backlight according to claim 10 is characterized in that: utilize radium-shine, sandblast or etching mode forms this light scattering pattern on strip-shaped bulges.
12. module backlight according to claim 9 is characterized in that: the section shape of each strip projected parts thing comprises: semicircle, quadrangle or triangle.
13. module backlight according to claim 9 is characterized in that: strip-shaped bulges for join continuously each other, etc. continuously join or do not wait continuous joining.
14. module backlight according to claim 9 is characterized in that: the height of strip-shaped bulges for be equal to each other, rule changes or irregular variation.
15. module backlight according to claim 9 is characterized in that: strip-shaped bulges is arranged on this upper surface and this lower surface simultaneously.
16. a light transmission method is realized through following steps:
Adopt a LGP in order to eliminate the bright line that produces between adjacent two leaded light zones; Wherein, This LGP has a upper surface and a lower surface; Each leaded light zone has one first limit adjacent one another are and one second limit; Be provided with a light source at place, this first limit and this light source provides a light to incide in this LGP, the transmission direction of this light is parallel with the bearing of trend on this second limit;
Bearing of trend along this second limit of this LGP; This upper surface and this lower surface at this LGP are provided with a plurality of strip projected parts things on one of them at least; This light can be transmitted in strip-shaped bulges; Wherein, said a plurality of strip projected parts thing is set in said each leaded light zone, between two adjacent leaded light zones, is provided with a groove.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101144420A CN101782218B (en) | 2010-02-26 | 2010-02-26 | Light guide plate, backlight module and light transmission method |
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| CN2010101144420A CN101782218B (en) | 2010-02-26 | 2010-02-26 | Light guide plate, backlight module and light transmission method |
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| CN101782218B true CN101782218B (en) | 2012-09-05 |
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| TWI438534B (en) | 2010-09-15 | 2014-05-21 | Wintek China Technology Ltd | Lighting device |
| CN102444833B (en) * | 2010-10-08 | 2013-10-30 | 联胜（中国）科技有限公司 | Illumination device |
| CN101984281B (en) * | 2010-11-05 | 2012-07-25 | 友达光电股份有限公司 | Zonal light-emitting backlight module |
| CN102478681A (en) * | 2010-11-30 | 2012-05-30 | 联建(中国)科技有限公司 | Light guide element and light source device |
| JP5278635B1 (en) * | 2012-03-09 | 2013-09-04 | オムロン株式会社 | Surface light source device |
| KR20130116704A (en) * | 2012-04-16 | 2013-10-24 | 삼성디스플레이 주식회사 | Backlight assembly and display apparatus having the same |
| CN104272011A (en) * | 2012-05-10 | 2015-01-07 | 松下知识产权经营株式会社 | Light guide |
| CN104714270B (en) * | 2015-03-20 | 2018-05-08 | 青岛海信移动通信技术股份有限公司 | A kind of light guiding film of mobile equipment and mobile equipment |
| JP2017187548A (en) * | 2016-04-01 | 2017-10-12 | 株式会社ジャパンディスプレイ | Display device |
| WO2021196034A1 (en) * | 2020-03-31 | 2021-10-07 | 深圳市汇顶科技股份有限公司 | Under-screen fingerprint identification apparatus, backlight module, liquid crystal display screen, and electronic device |
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