CN101482632A - Light guiding structure of light conducting plate - Google Patents
Light guiding structure of light conducting plate Download PDFInfo
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- CN101482632A CN101482632A CNA2009100049619A CN200910004961A CN101482632A CN 101482632 A CN101482632 A CN 101482632A CN A2009100049619 A CNA2009100049619 A CN A2009100049619A CN 200910004961 A CN200910004961 A CN 200910004961A CN 101482632 A CN101482632 A CN 101482632A
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- light guide
- structure according
- guide structure
- ridge portion
- angle
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Abstract
The invention relates to a light guide structure of light guide board, the light guide structure comprises a plurality of projecting ridge parts which extend on a lengthwise direction. The heights or the angles of each projecting ridge part have periodical or random variations along the lengthwise direction.
Description
Technical field
The present invention in more detail, has the light guide structure of defective screening effect about the light guide structure of light guide plate.
Background technology
LCD (Liquid Crystal Display, LCD) have power saving, in light weight, low radiation and advantage such as portable, be widely used in TV, computer screen, notebook computer, auto-navigation system, mobile communications device etc., replace traditional display gradually, become the main flow on the monitor market.Wherein, one of key part and component promptly is mould backlight fast (Backlight Module), and the light source that provides panel of LCD even and enough is provided.
Wherein, mould backlight is provided with the position according to the difference of light source soon, mainly can be divided into two kinds: straight-down negative and side incident type (Edge Type).Wherein, the mould backlight of side incident type is meant a side that light source is arranged at light guide plate soon, its biggest advantage is that integral body is comparatively frivolous, and can satisfy demands such as the fast high brightness of mould backlight, low cost, brightness uniformity simultaneously, in the application of the LCD of specific dimensions, favored especially easily.The fast light guide plate of side incident type mould backlight can adopt flat board or clapboard, and at the one-sided configurable light source of light guide plate, perhaps disposes light source respectively at bilateral, to increase overall brightness.
Yet the area source that exiting surface projected of light guide plate may have the local inhomogeneous situation that produces bright spot or dim spot and take place.For example, light guide plate may produce local bright spot because of structural disappearance, or often cause local dim spot because of scratch in the handling process in process of production.Traditional a kind of settling mode is to set up down diffusion sheet, reach the effect of desalination bright spot or dim spot, yet, the setting of following diffusion sheet will certainly cause overall brightness to descend, and if save down diffusion sheet, then can't desalinate aforementioned bright DSD dark spot defect, the whole evenly requirement for area source still is difficult to meet.
In view of this, how to utilize the light guide structure design of light guide plate, make under the situation that does not add following diffusion sheet, take into account the local bright dim spot of desalination or scratch problem, an industry problem demanding prompt solution for this reason.
Summary of the invention
One object of the present invention is to provide a kind of light guide structure of light guide plate, by the variation of light guide structure, makes the path of light be able to confusion, and then makes the defectives such as bright dim spot on the light guide plate can obtain to cover.
For reaching above-mentioned purpose, the present invention discloses a kind of light guide structure of light guide plate.Light guide structure comprises a plurality of ridge portion, extends on a longitudinally respectively.Respectively this ridge portion has a height, and this height is along this longitudinally, has a height change and corresponding to an average height of this height change, wherein, this height change between this average height 15 2 percent to 1 between.In another embodiment of the present invention, the drift angle of ridge portion is along this longitudinally, an average angle that has that an angle changes and change corresponding to this angle, this angle change between this average angle ± 10% between.
Behind the embodiment of consulting accompanying drawing and describing subsequently, affiliated technical field has knows that usually the knowledgeable just can understand purpose of the present invention, and technological means of the present invention and enforcement aspect.
Description of drawings
Fig. 1 is the synoptic diagram of the light guide structure of first embodiment of the invention;
Fig. 2 is the synoptic diagram of the light guide structure of second embodiment of the invention;
Fig. 3 is the synoptic diagram of the light guide structure of third embodiment of the invention; And
Fig. 4 is the synoptic diagram of the light guide structure of fourth embodiment of the invention.
The main element symbol description
2: light guide plate 20: light guide structure
21: the X of ridge portion: longitudinally
H: height 25: exiting surface
26: bottom surface 27: incidence surface
29: light source θ: drift angle
Embodiment
Below will explain content of the present invention, yet embodiments of the invention are not to need can implement as the described any particular environment of embodiment, application or particular form in order to restriction the present invention through several embodiment.Therefore, only be explaination purpose of the present invention about the explanation of embodiment, but not in order to restriction the present invention.Need the expositor, below in several embodiment and the accompanying drawing, size of component only disclose technology of the present invention in order to clear, but not in order to limiting the present invention, and has omitted with element that the present invention has nothing to do and not shown.
Fig. 1 is for describing the first embodiment of the present invention, wherein, light guide plate 2 have exiting surface 25, with exiting surface 25 opposed bottom surface 26 and the incidence surface 27 that is positioned at lateral margin, incidence surface 27 is in order to receive the light that light source 29 is injected.In the present embodiment, the exiting surface 25 of light guide plate 2 is formed by a light guide structure 20, and light guide structure 20 comprises a plurality of ridge portion 21, and substantially vertical with incidence surface 27 respectively longitudinally X goes up and extends, described ridge portion 21 these exiting surfaces 25 of definition.
The characteristic of light guide structure 20 of the present invention is that respectively this ridge portion 21 changes along this longitudinally X.In the present embodiment, respectively this ridge portion 21 has leg-of-mutton cross section, and has a height H, and respectively the height H of this ridge portion 21 has a height change along this longitudinally X.
More particularly, because the height H of ridge portion 21 is to change with longitudinally X, definable ridge portion 21 has an average height.Preferably, the variation of height H between average height 15 2 percent to 1 between.In addition, if height H is periodic variation, the period of change of height H then is preferably between between 40 to 70 times of height change.
In the present embodiment, the cross section presents leg-of-mutton ridge portion 21 can have a vertex angle theta, preferably between 60 degree between 170 degree, more preferably between 70 degree between 110 degree.The vertex angle theta of each ridge portion 21 can be same to each other or different to each other (for example random variation or rule change), and is identical in fact in the vertex angle theta of each ridge portion 21 illustrated in fig. 1, but only in order to illustration, is not in order to restriction the present invention.In addition, shown in Figure 1 described ridge portion 21 is adjacent one another are, and is distributed in continuously on the light guide plate 2.
Though the disclosed ridge of present embodiment portion 21 is arranged on the exiting surface 25, yet bottom surface 26 also can be provided with aforesaid ridge portion 21.Perhaps, implement in the aspect at another kind, exiting surface 25 is provided with ridge portion 21, and can form a sandblast structure (figure does not show) or traditional vee-cut on the bottom surface 26; Or, change ridge portion 21 is arranged on the bottom surface 26, and on exiting surface 25, can form sandblast structure (figure does not show) or traditional vee-cut.
Mandatory declaration be that the light guide plate of present embodiment can be flat board or clapboard, and the height change of ridge portion 21 is periodically or the variation of randomness, does not limit at this.Wherein, if the period of change of ridge portion 21 is shorter, light more easily reaches the effect that mixes, and is preferable for the screening effect of bright spot or dim spot.
The second embodiment of the present invention continues aforesaid first embodiment as shown in Figure 2, has different vertex angle theta between each ridge portion 21 and changes, and ridge portion 21 periodically is distributed on the light guide plate 2 according to described vertex angle theta.As shown in the figure, the variation of vertex angle theta is that the mode with the first angle θ 1, the second angle θ 2, third angle degree θ 3 circulation change disposes, for example the first angle θ 1 be 80 the degree, the second angle θ 2 be 120 the degree and third angle degree θ 3 be 150 the degree, perhaps the first angle θ 1 be 120 the degree, the second angle θ 2 be 150 the degree and third angle degree θ 3 be 160 the degree.Mandatory declaration be, aforesaid angle changes, and the number of repetitive cycling only be illustration, but not as limit, can be designed and arranged in pairs or groups according to the product performance demand.
The third embodiment of the present invention as shown in Figure 3, as shown in the figure, described ridge portion 21 is distributed on the light guide plate 2 at each interval, whether the angle of other vertex angle theta changes, variation range and previous embodiment are similar, does not repeat them here.
The fourth embodiment of the present invention as shown in Figure 4, different with previous embodiment is, in the present embodiment, the vertex angle theta 4 of each ridge portion 21 has an angle and changes along longitudinally X.In detail, change corresponding to this angle, the definable respectively vertex angle theta 4 of this ridge portion 21 has an average angle, preferably, the angle of vertex angle theta 4 change between this average angle ± 10% between, and this angle changes to can be periodically or randomly and changes, if present the variation of one-period property, between 10 to 50 times that its cycle preferably changes between angle.
What must illustrate is, can continuous distribution or spaced apart discontinuously between the described ridge portion 21, and each ridge portion 21 is except vertex angle theta 4 periodically or randomly angle changes along longitudinally X, the drift angle of described ridge portion 21 can mutually the same or inequality (for example to distribute) at random or periodically, please join previous disclosed other embodiment, not give unnecessary details in addition at this.
In sum, light guide structure utilization height of the present invention or its drift angle angle, periodic variation along longitudinally, the various configuration modes of the described ridge of further collocation portion, influence the path of light, to make the VC effect,, further promote the product yield to reach the screening effect of defectives such as bright spot, dim spot or scratch.
Though the present invention with embodiment openly as above; right its is not in order to limit the present invention; any have a technical field of the invention know the knowledgeable usually; without departing from the spirit and scope of the present invention; when doing various changes and retouching; and can imagine other different embodiment, so protection scope of the present invention is when looking being as the criterion that claims define.
Claims (30)
1. the light guide structure of a light guide plate, comprise a plurality of ridge portion, on a longitudinally, extend respectively, respectively this ridge portion has a height, this height is along this longitudinally, have a height change and corresponding to an average height of this height change, wherein, this height change between this average height 15 2 percent to 1 between.
2. light guide structure according to claim 1, wherein this light guide plate has an incidence surface, and this longitudinally is in fact perpendicular to this incidence surface.
3. light guide structure according to claim 2, wherein this height change is the variation of one-period property.
4. light guide structure according to claim 3, wherein this height change has one-period, between between 40 to 70 times of this height change.
5. light guide structure according to claim 2, wherein this height change is a random variation.
6. according to claim 4 or 5 described light guide structures, wherein respectively this ridge portion has a cross section, and this cross section is essentially triangle.
7. light guide structure according to claim 6, wherein each described ridge portion has a drift angle respectively, and described ridge portion periodically is distributed on this light guide plate according to described drift angle.
8. light guide structure according to claim 7, wherein said drift angle is between 60 degree are spent to 170.
9. light guide structure according to claim 8, wherein said drift angle is between 70 degree are spent to 110.
10. light guide structure according to claim 7, wherein said ridge portion is adjacent one another are, is distributed in continuously on this light guide plate.
11. light guide structure according to claim 2, wherein this light guide plate has an exiting surface, is defined by described ridge portion in fact.
12. light guide structure according to claim 11, wherein this light guide plate also comprises a bottom surface relative with this exiting surface, forms a sandblast structure on this bottom surface.
13. light guide structure according to claim 2, wherein this light guide plate has an exiting surface and a bottom surface relative with this exiting surface, and this bottom surface is defined by described ridge portion in fact.
14. light guide structure according to claim 13 wherein forms a sandblast structure on this exiting surface.
15. light guide structure according to claim 2, wherein this light guide plate is one of them of a flat board and a clapboard.
16. the light guide structure of a light guide plate, comprise a plurality of ridge portion, on a longitudinally, extend respectively, respectively this ridge portion has a drift angle, this drift angle is along this longitudinally, an average angle that has that an angle changes and change corresponding to this angle, wherein, this angle change between this average angle ± 10% between.
17. light guide structure according to claim 16, wherein this light guide plate has an incidence surface, and this longitudinally is in fact perpendicular to this incidence surface.
18. light guide structure according to claim 17, wherein this angle is changed to the variation of one-period property.
19. changing, light guide structure according to claim 18, this angle have one-period, between change between this angle 10 to 50 times.
20. light guide structure according to claim 17, wherein this angle is changed to a random variation.
21. according to claim 19 or 20 described light guide structures, wherein respectively this ridge portion has a cross section, this cross section is essentially triangle.
22. light guide structure according to claim 21, the described drift angle of wherein said ridge portion's foundation periodically is distributed on this light guide plate.
23. light guide structure according to claim 22, wherein said drift angle is between 60 degree are spent to 170.
24. light guide structure according to claim 23, wherein said drift angle is between 70 degree are spent to 110.
25. light guide structure according to claim 22, wherein said ridge portion is adjacent one another are, is distributed in continuously on this light guide plate.
26. light guide structure according to claim 17, wherein this light guide plate has an exiting surface, is defined by described ridge portion in fact.
27. light guide structure according to claim 26, wherein this light guide plate also comprises a bottom surface relative with this exiting surface, forms a sandblast structure on this bottom surface.
28. light guide structure according to claim 17, wherein this light guide plate has an exiting surface and a bottom surface relative with this exiting surface, and this bottom surface is defined by described ridge portion in fact.
29. light guide structure according to claim 28 wherein forms a sandblast structure on this exiting surface.
30. light guide structure according to claim 17, wherein this light guide plate is one of them of a flat board and a clapboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100049619A CN101482632B (en) | 2009-02-20 | 2009-02-20 | Light guiding structure of light conducting plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100049619A CN101482632B (en) | 2009-02-20 | 2009-02-20 | Light guiding structure of light conducting plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101482632A true CN101482632A (en) | 2009-07-15 |
| CN101482632B CN101482632B (en) | 2010-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100049619A Active CN101482632B (en) | 2009-02-20 | 2009-02-20 | Light guiding structure of light conducting plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102289025A (en) * | 2011-07-20 | 2011-12-21 | 深圳市华星光电技术有限公司 | Light guide plate and back light module |
| US8821002B2 (en) | 2011-07-20 | 2014-09-02 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Light guide plate and backlight module |
-
2009
- 2009-02-20 CN CN2009100049619A patent/CN101482632B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102289025A (en) * | 2011-07-20 | 2011-12-21 | 深圳市华星光电技术有限公司 | Light guide plate and back light module |
| WO2013010343A1 (en) * | 2011-07-20 | 2013-01-24 | 深圳市华星光电技术有限公司 | Light guide plate and backlight module |
| US8821002B2 (en) | 2011-07-20 | 2014-09-02 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Light guide plate and backlight module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101482632B (en) | 2010-09-15 |
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