CN101738674A - Light guide plate and backlight module - Google Patents
Light guide plate and backlight module Download PDFInfo
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- CN101738674A CN101738674A CN200810176756A CN200810176756A CN101738674A CN 101738674 A CN101738674 A CN 101738674A CN 200810176756 A CN200810176756 A CN 200810176756A CN 200810176756 A CN200810176756 A CN 200810176756A CN 101738674 A CN101738674 A CN 101738674A
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- light
- kink
- guide plate
- strip
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Abstract
The invention discloses a light guide plate comprising a platy transmitting body and a plurality of strip-shaped surface structures, wherein the platy transmitting body is provided with a top formed by bending, a bottom and a bending part for connecting the top and the bottom; the top and the bottom are approximately parallel and maintain a gap therebetween; the plurality of strip-shaped surface structures are mutually connected and positioned on the outside surface of the bending part. A backlight module provided with the light guide plate comprises a light source, a reflex housing and a two-sided reflector plate, wherein the light source is adjacent to one side of the platy transmitting body and applicable for emitting the light; the reflex housing is adjacent to the outside surface of the bending part to reflect the light transmitted by the bending part back to the inside of the platy transmitting body; and the two-sided reflector plate is arranged in the gap between the top and the bottom. The invention provides the two-sided light-emitting effect and favorable light energy distribution character by a simplified architecture and can avoid the interactive influence of light from different light-emitting surfaces.
Description
[technical field]
The present invention is about two-sided light guide plate and the module backlight that goes out light characteristic of a kind of tool.
[background technology]
Fig. 1 is for showing the synoptic diagram of an existing two-sided module 100 backlight.As shown in Figure 1, two-sided module backlight 100 comprises a light guide plate 102, two cold cathode fluorescent lamp 104, two fluorescent tube reflecting plates 106 and a pipe hole pattern 108.The light that cold cathode fluorescent lamp 104 is sent is incident in the light guide plate 102 after being reflected by fluorescent tube reflecting plate 106, light relends by pipe hole pattern 108 diffuser plate 110 of ray guidance to the front that is positioned at light guide plate 102 and the back side afterwards, and via bright dipping after the positive view directions of prismatic lens 112 guiding.
Though above-mentioned existing design can obtain the effect of two-sided bright dipping, the bright dipping of two exiting surfaces influences each other easily or produces the situation of light leak up and down, and the screen picture that goes out the influence of light opposite side of light guide plate 102 either sides is shown.
[summary of the invention]
The invention provides a kind of light guide plate and module backlight, it can simplify framework with one provides two-sided go out light effect and good light energy distribution characteristic, and can avoid the bright dipping reciprocal effect each other of different exiting surfaces.
In order to achieve the above object, the invention provides a kind of light guide plate, comprise a tabular light penetrating object and several strip-shaped surface structures.Tabular light penetrating object has the top that is bent to form, a bottom and connects a kink of top and bottom, top and bottom almost parallel and keep a gap.Several strip-shaped surface structures are connected with each other and are positioned at the outer surface of the kink of tabular light penetrating object.
The present invention also provides a kind of module backlight, comprises a tabular light penetrating object, a light source, a reflex housing, a two-sided reflector plate, reaches several strip-shaped surface structures.
Tabular light penetrating object has the top that is bent to form, a bottom and connects a kink of top and bottom, and top and this almost parallel and keep a gap.One side of the contiguous tabular light penetrating object of light source and be suitable for sending a light, an outer surface of the contiguous kink of reflex housing is with in the tabular light penetrating object of light reflected back that will be appeared by kink, and the double-sided reflecting sheet is located at the gap between top and bottom.Several strip-shaped surface structures are connected with each other and are positioned at the outer surface of kink.
Based on above-mentioned each design, because of the light guide plate of module backlight is made of tabular light penetrating object, tabular light penetrating object is bent to form two independently top and bottoms, and top and bottom have other microstructure distributed areas, therefore can adjust the light energy distribution that of first side and second side easily, and the double-sided reflecting sheet can be isolated the bright dipping of first side and second side, avoids the bright dipping of first side and second side to influence each other or produces light leakage phenomena.Moreover it is also quite simple and easy to utilize bending forming to constitute the manufacture of a plurality of light guide plate exiting surfaces, and can effectively reduce manufacturing cost.
[description of drawings]
Fig. 1 is for showing the synoptic diagram of an existing two-sided module backlight.
Fig. 2 is according to one embodiment of the invention, shows the component decomposition map of a module backlight, and Fig. 3 is the diagrammatic cross-section after the module backlight of Fig. 2 is assembled.
Fig. 4 A-Fig. 4 C is a synoptic diagram, shows a manufacture embodiment of tabular light penetrating object.
Fig. 5 is a diagrammatic cross-section, shows the light bang path according to the module backlight of one embodiment of the invention.
Fig. 6 A and Fig. 6 B are for showing the synoptic diagram of an embodiment who improves tabular light penetrating object light utilization ratio.
Fig. 6 C and Fig. 6 D are for showing the synoptic diagram of another embodiment that improves tabular light penetrating object light utilization ratio.
Fig. 7 A-Fig. 7 C is according to different embodiments of the invention, shows the synoptic diagram of the relative light source configuration mode of tabular light penetrating object.
Fig. 8 A-Fig. 8 D is according to different embodiments of the invention, shows the profile of tabular light penetrating object and the synoptic diagram of relative light source configuration mode.
10 module 102 light guide plate backlight
12 tabular light penetrating object 104 cold cathode fluorescent lamp
100 module 112 prismatic lenses backlight
121 transparent plates, 24 diffusion sheets
122 first microstructures, 26 blast sheets
123 second microstructures, 32 strip-shaped surface structures
124 the 3rd microstructure CT kink central planes
125 the 4th microstructure S1, first side
14 light source S2, second side
14a exiting surface S3 the 3rd side
16 reflex housing S4 the 4th side
18 double-sided reflecting sheet S5 top end faces
22 gaps
The S6 bottom end face
Other purposes of the present invention and advantage can be further understood from the disclosed technical characterictic of the present invention.For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, embodiment cited below particularly also cooperates appended graphicly, is described in detail below.
[embodiment]
About aforementioned and other technology contents, characteristics and effect of the present invention, in the following detailed description that cooperates with reference to graphic embodiment, can clearly present.The direction term of being mentioned in following examples, for example: upper and lower, left and right, front or rear etc. only are the directions with reference to annexed drawings.Therefore, the direction term of use is to be used for illustrating not to be to be used for limiting the present invention.
Fig. 2 is one embodiment of the invention, shows the component decomposition map of a module 10 backlight, and Fig. 3 is the diagrammatic cross-section after module 10 assemblings backlight.
Please also refer to Fig. 2 and Fig. 3, module 10 backlight comprises a tabular light penetrating object 12, at least one light source 14 (being illustrated as a plurality of light emitting diodes among the figure), a reflex housing 16, reaches a two-sided reflector plate 18.Tabular light penetrating object 12 has a top 12a, bottom 12b who is bent to form and a kink 12c who connects top 12a and bottom 12b, and top 12a and bottom 12b almost parallel are also kept a gap 22, and double-sided reflecting sheet 18 is arranged in the gap 22.Light source 14 is close to a side of tabular light penetrating objects 12 and is suitable for sending a light, and the side of reflex housing 16 contiguous kink 12c will be in order to being appeared in the tabular light penetrating object 12 of light reflected back of tabular light penetrating object 12 by kink 12c.Moreover, the top of tabular light penetrating object 12 and down can stacked a plurality of blooming pieces to improve the optical characteristics of module 10 backlight, those blooming pieces are diffusion sheet 24, blast sheet 26 or the like for example.
Fig. 4 A-Fig. 4 C is the synoptic diagram of one embodiment of the invention, shows a manufacture embodiment of tabular light penetrating object 12.Shown in Fig. 4 A, two separated regions in transparent plate 121 bottom surfaces of an ejection formation form several first microstructures 122 and several second microstructures 123 respectively, and two separated regions of transparent plate 121 end faces also can form several the 3rd microstructures 124 and several the 4th microstructures 125 respectively.Then, shown in Fig. 4 B, transparent plate 121 is via being bent after the thermal treatment, the part of bending is not for being formed with the white space of microstructure, behind the two part almost parallels up and down that are bent to transparent plate 121 shown in Fig. 4 C, finalize the design to meet the specification requirement of a light guide plate in the cold treatment mode again.
Fig. 5 is the diagrammatic cross-section of one embodiment of the invention, shows the light bang path of a module 10 backlight.After the light that light source 14 sends enters the tabular light penetrating object 12 of bending, light forms inner full-reflection according to Snell ' s law at tabular light penetrating object 12, when light meet be formed at top 12a its dorsad after several first microstructures (figure does not show) on the first side S1 of double-sided reflecting sheet 18, part light is entered bottom 12b by the first microstructure deviation again to kink 12c, part light destroys total reflection and changes light path and can be derived by the first side S1 because of first microstructure.On the other hand, when light meet be formed at bottom 12b its dorsad after several second microstructures (figure does not show) on the second side S2 of double-sided reflecting sheet 18, part light is entered top 12a by the second microstructure deviation again to kink 12c, part light destroys total reflection and changes light path and can be derived by the second side S2 because of second microstructure.Be arranged at double-sided reflecting sheet 18 almost parallels, the first side S1 and the second side S2 in the gap 22, can be with in the tabular light penetrating object 12 of the light reflected back that appears by top 12a and bottom 12b, and be located at the reflex housing 16 in the kink 12c outside can be with in the tabular light penetrating object 12 of the light reflected back that appears by kink 12c.The profile of reflex housing 16 does not limit, and in an embodiment, the profile that the profile of reflex housing 16 can corresponding kink 12c is to improve the light quantity in the tabular light penetrating object 12 of reflected back.
Design by the foregoing description, because of the light guide plate of module backlight is made of tabular light penetrating object 12, tabular light penetrating object 12 is bent to form two independently top 12a and bottom 12b, and top 12a and bottom 12b have other microstructure distributed areas, therefore can adjust the light energy distribution of the first side S1 and the second side S2 easily, and double-sided reflecting sheet 18 can be isolated the bright dipping of the first side S1 and the second side S2, avoid the bright dipping of the first side S1 and the second side S2 to influence each other or produce light leakage phenomena, particularly when the area of two exiting surfaces (for example little screen at the main screen of mobile phone and the back side) not simultaneously, can avoid the light leak of little screen because of the isolation of double-sided reflecting sheet 18 influences the picture demonstration of main screen.Moreover it is also quite simple and easy to utilize bending forming to constitute the manufacture of a plurality of light guide plate exiting surfaces, and can effectively reduce manufacturing cost.
Moreover, please also refer to Fig. 4 C and Fig. 5, though it is and inessential, but 12a its one the 3rd side S3 towards double-sided reflecting sheet 18 in top can form several the 3rd microstructures 124, and 12b its one the 4th side S4 towards double-sided reflecting sheet 18 in bottom can form several the 4th microstructures 125, also can significantly improve the light quantity of past positive view directions deviation so as to the light energy distribution of the further adjustment first side S1 and the second side S2.The profile of first to fourth above-mentioned microstructure does not limit, and for example is all can in a groove or a site.
Fig. 6 A and Fig. 6 B improve tabular light penetrating object 12, the synoptic diagram of an embodiment of light utilization ratio for showing.Shown in Fig. 6 A and Fig. 6 B, several strip-shaped surface structures 32 can be connected with each other and be formed at the outer surface of kink 12c, so as to reducing the probability that light appears kink 12c, and improve the light quantity that light enters top 12a or bottom 12b after by kink 12c again.In present embodiment, the kink 12c of tabular light penetrating object 12 can its central plane CT be the boundary, divide into a first half and a Lower Half, a plurality of strip-shaped surface structures 32 can be formed at the first half (Fig. 6 A) and the Lower Half (Fig. 6 B) of kink 12c, and form a plurality of angle theta 1-θ 5 with central plane CT respectively, and no matter be formed at the first half or Lower Half the value of angle by the central plane CT of kink 12c to a periphery of outer surface successively decrease (θ 1＞θ 2＞θ 3＞θ 4＞θ 5).When the quantity of the strip-shaped surface structures 32 of central plane to a periphery that is formed at kink 12c outer surface is n, r strip-shaped surface structures then being counted by central plane in n strip-shaped surface structures 32 and the angle theta r of central plane CT can meet following relational expression:
θr＝90°*[n-(r-1)]/n。
Utilize this formula can calculate the preferable angulation of each strip-shaped surface structures 32, for example when n=5, can draw the angulation of θ 1=90 °, θ 2=72 °, θ 3=54 °, θ 4=36 ° and θ 5=18 °.Moreover, though it is identical with the quantity that is formed at Lower Half to be formed at strip-shaped surface structures 32 quantity of the first half in the present embodiment, but it does not limit, shown in Fig. 6 C and Fig. 6 D, the quantity that forms the strip-shaped surface structures 32 of the first half and Lower Half also can be different, and for example the first half (Fig. 6 C) forms 4 strip-shaped surface structures 32 (θ 1=90 °, θ 2=67.5 °, θ 3=45 °, θ 4=22.5 °) and Lower Half (Fig. 6 D) and forms 5 strip-shaped surface structures 32 (θ 1=90 °, θ 2=72 °, θ 3=54 °, θ 4=36 ° and θ 5=18 °) and also can.
According to design of the present invention, an exiting surface 14a of light source 14 can roughly overlap top 12a an end face S5 (Fig. 7 B), bottom 12b an end face S6 (Fig. 7 C) or overlap the end face S5 at top simultaneously and the end face S6 of bottom (Fig. 7 A).Moreover, but the end (Fig. 8 D) of the end of light source adjacent bottom 12b (Fig. 8 A) or contiguous kink 12c, the thickness of top 12a can be maintained fixed (Fig. 8 A) or towards away from the direction of kink 12c decrescence (Fig. 8 B), and the thickness of bottom can be maintained fixed (Fig. 8 B), towards away from the direction of kink 12c cumulative (Fig. 8 C), towards away from the direction of kink 12c decrescence (Fig. 8 D) or towards away from the direction of kink 12c back cumulative (Fig. 8 A) decrescence.Moreover top 12a and bottom 12b can have identical size (Fig. 8 C), and the different size (Fig. 8 A) of perhaps can having makes the area difference of first exiting surface and this second exiting surface.Note that in the explanation of aforementioned each embodiment " top " reaches " bottom " term and only be the illustrated denotion of collocation, and non-limiting the present invention.
Moreover in an embodiment, the subregion in double-sided reflecting sheet 18 its corresponding module backlight 10 clear zones can be coated with for example light absorbing material of printing ink, so as to adjusting the bright dark distribution of light guide plate, to improve the light-emitting uniformity of module 10 backlight.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limiting the present invention, anyly has the knack of this skill person, without departing from the spirit and scope of the invention; when can doing a little change and retouching, so the present invention's protection domain is as the criterion when looking the claim person of defining.In addition, arbitrary embodiment of the present invention or claim must not reached whole purposes or advantage or the characteristics that the present invention discloses.
Claims (19)
1. a light guide plate is suitable for conducting a light, and this light guide plate comprises:
One tabular light penetrating object has a top, bottom that is bent to form and a kink that connects this top and this bottom, and this top is parallel with this bottom and keep a gap; And
Several strip-shaped surface structures are connected with each other and are positioned at an outer surface of this kink.
2. light guide plate as claimed in claim 1 is characterized in that: a central plane of these strip-shaped surface structures and this kink forms several angles, and the value of these angles is successively decreased by the periphery of this central plane towards this outer surface.
3. light guide plate as claimed in claim 2 is characterized in that: this kink is divided into one the first half one and one the second half one by this central plane, and these strip-shaped surface structures quantity of being positioned at this first half one is inequality with the quantity that is positioned at this second half one.
4. light guide plate as claimed in claim 2, it is characterized in that: this central plane to the quantity of these intermarginal strip-shaped surface structures of this week is n, and in this n strip-shaped surface structures, the angle theta r of the r of being counted by this central plane this strip-shaped surface structures and this central plane meets following relational expression:
θr＝90°*[n-(r-1)]/n。
5. light guide plate as claimed in claim 1 is characterized in that: also comprise:
Several first microstructures are positioned at one first side of a side of this bottom dorsad at this top, so that this light is derived by this first side; And
Several second microstructures are positioned at one second side of a side at this top dorsad of this bottom, so that this light is derived by this second side.
6. light guide plate as claimed in claim 5 is characterized in that: this first and this second microstructure be respectively a groove or a site.
7. light guide plate as claimed in claim 1 is characterized in that: also comprise:
Several the 3rd microstructures are positioned at one the 3rd side towards a side of this bottom at this top, with this light of deviation; And
Several the 4th microstructures are positioned at one the 4th side towards the side at this top of this bottom, with this light of deviation.
8. light guide plate as claimed in claim 7 is characterized in that: the 3rd and the 4th microstructure is respectively a groove or a site.
9. light guide plate as claimed in claim 1 is characterized in that: an end of this bottom is close at least one light source, and the thickness of this bottom is towards decrescence back cumulative away from a direction of this kink.
10. light guide plate as claimed in claim 1 is characterized in that: the contiguous at least one light source of an end of this bottom, and the thickness of this bottom court is cumulative or decrescence away from a direction of this kink.
11. light guide plate as claimed in claim 1 is characterized in that: the contiguous at least one light source of an end of this bottom, and the thickness at this top is towards away from a direction of this kink decrescence.
12. a module backlight comprises:
One tabular light penetrating object has a top, bottom that is bent to form and a kink that connects this top and this bottom, and this top is parallel with this bottom and keep a gap;
Several strip-shaped surface structures are connected with each other and are positioned at an outer surface of this kink;
One light source is close to a side of this tabular light penetrating object and is suitable for sending a light;
One reflex housing, this outer surface of contiguous this kink is in this tabular light penetrating object of this light reflected back that will be appeared by this kink; And
One two-sided reflector plate is located at this gap between this top and this bottom.
13. module backlight as claimed in claim 12 is characterized in that: a central plane of these strip-shaped surface structures and this kink forms several angles, and the value of these angles is successively decreased by the periphery of this central plane towards this outer surface.
14. module backlight as claimed in claim 13 is characterized in that: this kink is divided into one the first half one and one the second half one by this central plane, and these strip-shaped surface structures quantity of being positioned at this first half one is inequality with the quantity that is positioned at this second half one.
15. module backlight as claimed in claim 13, it is characterized in that: this central plane to the quantity of these intermarginal strip-shaped surface structures of this week is n, and the angle theta r of the r of being counted by this central plane in this n strip-shaped surface structures this strip-shaped surface structures and this central plane meets following relational expression:
θr＝90°*[n-(r-1)]/n。
16. module backlight as claimed in claim 12 is characterized in that: also comprise:
Several first microstructures are positioned at one first side of a side of this double-sided reflecting sheet dorsad at this top of this tabular light penetrating object, so that this light is derived by this first side; And
Several second microstructures are positioned at one second side of a side of this double-sided reflecting sheet dorsad of this bottom of this tabular light penetrating object, so that this light is derived by this second side.
17. module backlight as claimed in claim 12 is characterized in that: also comprise:
One the 3rd microstructure is positioned at one the 3rd side towards a side of this double-sided reflecting sheet at this top of this tabular light penetrating object, with this light of deviation; And
One the 4th microstructure is positioned at one the 4th side towards a side of this double-sided reflecting sheet of this bottom of this tabular light penetrating object, with this light of deviation.
18. module backlight as claimed in claim 12 is characterized in that: an exiting surface of this light source overlaps an end face at this top or an end face of this bottom.
19. module backlight as claimed in claim 12 is characterized in that: the subregion of this double-sided reflecting sheet is coated with a light absorbing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810176756A CN101738674A (en) | 2008-11-20 | 2008-11-20 | Light guide plate and backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810176756A CN101738674A (en) | 2008-11-20 | 2008-11-20 | Light guide plate and backlight module |
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| Publication Number | Publication Date |
|---|---|
| CN101738674A true CN101738674A (en) | 2010-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810176756A Pending CN101738674A (en) | 2008-11-20 | 2008-11-20 | Light guide plate and backlight module |
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| CN (1) | CN101738674A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734750A (en) * | 2012-06-07 | 2012-10-17 | 惠州市德赛视听科技有限公司 | Strip-shaped light-emitting pole |
| CN103883914A (en) * | 2014-04-11 | 2014-06-25 | 江苏达伦电子股份有限公司 | Two-sided lamp with baffle |
| CN105467504A (en) * | 2015-12-31 | 2016-04-06 | 京东方科技集团股份有限公司 | Direct backlight module and display device |
| WO2016169066A1 (en) * | 2015-04-24 | 2016-10-27 | 深圳市华星光电技术有限公司 | Liquid crystal display, backlight module and light guide plate thereof |
| JP2020144284A (en) * | 2019-03-07 | 2020-09-10 | オムロン株式会社 | Stereoscopic image display unit and lighting fixture for vehicle |
| WO2021047010A1 (en) * | 2019-09-10 | 2021-03-18 | 武汉华星光电技术有限公司 | Backlight module and display apparatus |
| CN113028354A (en) * | 2021-03-22 | 2021-06-25 | 恒大恒驰新能源汽车研究院(上海)有限公司 | Vehicle, light emitting device, and light guide element |
| CN113721391A (en) * | 2021-11-01 | 2021-11-30 | 惠科股份有限公司 | Backlight module and liquid crystal display |
| CN114325918A (en) * | 2020-09-30 | 2022-04-12 | 元太科技工业股份有限公司 | Display device and light guide plate |
| CN114325918B (en) * | 2020-09-30 | 2024-04-23 | 元太科技工业股份有限公司 | Display device and light guide plate |
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2008
- 2008-11-20 CN CN200810176756A patent/CN101738674A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734750A (en) * | 2012-06-07 | 2012-10-17 | 惠州市德赛视听科技有限公司 | Strip-shaped light-emitting pole |
| CN103883914A (en) * | 2014-04-11 | 2014-06-25 | 江苏达伦电子股份有限公司 | Two-sided lamp with baffle |
| WO2016169066A1 (en) * | 2015-04-24 | 2016-10-27 | 深圳市华星光电技术有限公司 | Liquid crystal display, backlight module and light guide plate thereof |
| CN105467504A (en) * | 2015-12-31 | 2016-04-06 | 京东方科技集团股份有限公司 | Direct backlight module and display device |
| CN105467504B (en) * | 2015-12-31 | 2018-11-30 | 京东方科技集团股份有限公司 | Down straight aphototropism mode set and display device |
| JP7021653B2 (en) | 2019-03-07 | 2022-02-17 | オムロン株式会社 | 3D image display device and vehicle lighting equipment |
| JP2020144284A (en) * | 2019-03-07 | 2020-09-10 | オムロン株式会社 | Stereoscopic image display unit and lighting fixture for vehicle |
| WO2021047010A1 (en) * | 2019-09-10 | 2021-03-18 | 武汉华星光电技术有限公司 | Backlight module and display apparatus |
| CN114325918A (en) * | 2020-09-30 | 2022-04-12 | 元太科技工业股份有限公司 | Display device and light guide plate |
| CN114325918B (en) * | 2020-09-30 | 2024-04-23 | 元太科技工业股份有限公司 | Display device and light guide plate |
| CN113028354A (en) * | 2021-03-22 | 2021-06-25 | 恒大恒驰新能源汽车研究院(上海)有限公司 | Vehicle, light emitting device, and light guide element |
| CN113721391A (en) * | 2021-11-01 | 2021-11-30 | 惠科股份有限公司 | Backlight module and liquid crystal display |
| US11789314B2 (en) | 2021-11-01 | 2023-10-17 | HKC Corporation Limited | Backlight module and liquid crystal display |
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Open date: 20100616 |