CN101413641A - Light guide plate and backlight module - Google Patents
Light guide plate and backlight module Download PDFInfo
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- CN101413641A CN101413641A CNA2008101797523A CN200810179752A CN101413641A CN 101413641 A CN101413641 A CN 101413641A CN A2008101797523 A CNA2008101797523 A CN A2008101797523A CN 200810179752 A CN200810179752 A CN 200810179752A CN 101413641 A CN101413641 A CN 101413641A
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Abstract
The invention relates to a light guide plate and a backlight module, wherein, the light guide plate comprises a body and a plurality of prism microstructures. The body is provided with a bottom surface, a light emitting surface corresponding to the bottom surface and a plurality of sides which are connected between the bottom surface and the light emitting surface; the light emitting surface is provided with a central area and at least one peripheral area that is positioned outside the central area. The prism microstructures are positioned on the light emitting surface and the bottom surface; wherein, the prism microstructures positioned on the light emitting surface comprises a plurality of first prism microstructures and a plurality of second prism microstructures. The first prism microstructures are positioned inside the central area, and the second prism microstructures are positioned in the peripheral area. The vertex angle theta 2 of the second prism microstructure is greater than the vertex angle theta 1 of the first prism microstructure. The backlight module is provided with the light guide plate. The prism microstructures are formed on the light emitting surface and the bottom surface of the light guide plate, and the prism microstructures on the light emitting surface have different vertex angles, so that higher light-emitting efficiency and better visual angle effect are achieved.
Description
Technical field
The present invention relates to a kind of LGP and backlight module, and be particularly related to a kind of two-sided backlight module that has the LGP of prism microstructure and use this LGP.
Background technology
LCD mainly comprises display panels and backlight module two large divisions.Display panels provides the function that LCD shows, backlight module then is to be used to provide light source.And backlight modular structure can be divided into two kinds of direct type backlight module and side entrance back modules.In the side entrance back module, can use LGP usually.The effect of LGP is the light that the side direction light source is sent is carried out mixed light, makes it form uniform surface light source.
It is to utilize screen painting to form optical scattering structure that existing LGP is made major part, also has to utilize laser to layout or mode such as etching forms the technology of optical scattering structure.Though said method can provide good visual angle, has the shortcoming of luminance shortage.
Except the technology of above-mentioned several formation optical scattering structures, also have a kind of technology of making LGP to be called two V technology (Double V) in addition.So-called pair of V technology is to form the micro-structural with light diffusion effect respectively in the exiting surface and the bottom surface of LGP, reaches the effect of LGP mixed light.Yet though two V technology can increase the emitting brightness of LGP and reduce cost, its visual angle is little than the LGP that methods such as other employing net-point printing form optical scattering structure.
Summary of the invention
The object of the present invention is to provide a kind of LGP, its light extraction efficiency is preferable, angle limitations is less and mixed light is more even.
Another object of the present invention is to provide a kind of backlight module, the LGP of its application of aforementioned is to provide the backlight of better quality.
The present invention proposes a kind of LGP, comprises a body and a plurality of prism microstructure.Body have a bottom surface, relatively the bottom surface an exiting surface and be connected in the bottom surface and exiting surface between a plurality of sides, have a middle section and at least one outer peripheral areas on the exiting surface, outer peripheral areas is positioned at outside the middle section.Prism microstructure is positioned on exiting surface and the bottom surface, and the prism microstructure that wherein is positioned on the exiting surface comprises a plurality of first prism microstructure and a plurality of second prism microstructure.Wherein, first prism microstructure is positioned at middle section, and second prism microstructure is positioned at outer peripheral areas, and the vertex angle theta of second prism microstructure
2Vertex angle theta greater than first prism microstructure
1
The present invention also proposes a kind of backlight module, comprises an above-mentioned LGP and a light source group, and wherein the light source assembly places by at least one side of body of LGP, and is suitable for sending a light, and described light enters body by this side.
Useful technique effect of the present invention is that the present invention all forms prism microstructure in the exiting surface and the bottom surface of LGP, and makes the prism microstructure on the exiting surface have different drift angles, to reach higher light-emitting efficiency and preferable view effect.In addition, the prism microstructure of bottom surface of light guide plate cooperates the zones of different of exiting surface to do height or change in depth, makes that some has the zone of the prism microstructure of big drift angle on the exiting surface, and the problem that its light extraction efficiency is lower also can obtain compensation simultaneously.The backlight module of using above-mentioned LGP also can provide the backlight of better quality, and then improves the display quality of LCD.
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Figure 1A is the schematic diagram of a kind of LGP of one embodiment of the invention.
Figure 1B is the vertical view of exiting surface of the LGP of Figure 1A.
Fig. 2 A is the schematic diagram of a kind of LGP of another embodiment of the present invention.
Fig. 2 B is the vertical view of exiting surface of the LGP of Fig. 2 A.
Fig. 3 is along the schematic diagram of another embodiment of I-I ' line section among Figure 1A.
Fig. 4 A is the schematic diagram of a kind of LGP of other embodiment of the present invention.
Fig. 4 B is the profile of II-II ' line among Fig. 4 A.
Fig. 5 A and 5B are respectively the light conducting plate body of other two kinds of forms.
Fig. 6 is the schematic diagram of a kind of backlight module of one embodiment of the invention.
Fig. 7 is the schematic diagram of a kind of backlight module of another embodiment of the present invention.
Fig. 8 is the schematic diagram of a kind of backlight module of further embodiment of this invention.
Fig. 9 is the schematic diagram of a kind of backlight module of other embodiment of the present invention.
Wherein, description of reference numerals is as follows:
100,200,300a, 300b, 400a, 400b, 510,610,710,810: LGP
110,210,310,510a, 610a, 610b, 610c: body
112,212,312,513,613: the bottom surface
114,214,314,512c, 612c: exiting surface
114a, 214a, 314a: middle section
114b, 214b, 314b: outer peripheral areas
116,216,316,512a, 612a, 612b: side
120,220,320,513a, 513b, 613a, 613b: prism microstructure
120a: tri-prismoid
122,222: the first prism microstructure 124,224: the second prism microstructure
128,228: the four prism microstructure 214c: buffer area
226: the prism micro-structural 320a:V type grooves
500,600,700,800: backlight module 520,620,720,820: light source group
h
1, h
2: height v
1, v
2: the degree of depth
The specific embodiment
Figure 1A is the schematic diagram of a kind of LGP of one embodiment of the invention.Figure 1B is the vertical view of exiting surface of the LGP of Figure 1A.Please refer to Figure 1A, the LGP 100 of present embodiment comprises a body 110 and a plurality of prism microstructure 120.Body 110 have a bottom surface 112, relatively bottom surface 112 an exiting surface 114 and be connected in bottom surface 112 and exiting surface 114 between a plurality of sides 116.Shown in Figure 1A, the prism microstructure 120 that is positioned in the present embodiment on the bottom surface 112 can be the compartment of terrain arrangement, also can for example the prism microstructure on the bottom surface 112 120 be arranged continuously according to the actual demand adjustment.Please refer to Figure 1B, have a middle section 114a and at least one outer peripheral areas 114b on the exiting surface 114, outer peripheral areas 114b is positioned at outside the middle section 114a.In the present embodiment, show two outer peripheral areas 114b, and to define this outer peripheral areas 114b be the outer most edge that is positioned at exiting surface 114.Yet middle section 114a shown in the present embodiment and outer peripheral areas 114b only are usefulness for example, and the present invention does not limit shape and the ratio on body 110, physical location and the quantity etc. of middle section 114a and outer peripheral areas 114b.
Referring again to Figure 1A, prism microstructure 120 is positioned on exiting surface 114 and the bottom surface 112, and the prism microstructure 120 that wherein is positioned on the exiting surface 114 can comprise a plurality of first prism microstructure 122 and a plurality of second prism microstructure 124 based on the difference on its kenel.First prism microstructure 122 is positioned at middle section 114a, and second prism microstructure 124 is positioned at outer peripheral areas 114b, and the vertex angle theta of second prism microstructure 124
2Vertex angle theta greater than first prism microstructure 122
1In the present embodiment, the width of the width of first prism microstructure, 122 bottoms and second prism microstructure, 124 bottoms is wide in fact.In other embodiments of the invention, the height of the height of first prism microstructure 122 and second prism microstructure 124 is in fact contour.Yet first prism microstructure 122 shown in the present embodiment and second prism microstructure 124 only are usefulness for example, and the present invention does not limit quantity, dimension scale and the distribution proportion on exiting surface thereof etc. of prism microstructure.
In other words, present embodiment forms first prism microstructure 122 and second prism microstructure 124 with different drift angles on the exiting surface 114 of LGP 100, first prism microstructure 122 that wherein has less drift angle can provide preferable light extraction efficiency, can reach wider view effect and have than second prism microstructure 124 of big drift angle.Therefore, present embodiment selects first prism microstructure 122 is disposed at the middle section 114a of exiting surface 114, with the whole light extraction efficiency of effective lifting LGP 100.In addition, in view of the outer peripheral areas 114b of exiting surface 114 is easier to produce the visual angle problem, second prism microstructure 124 that therefore can reach wider view effect is disposed at outer peripheral areas 114b.So, the LGP 100 of present embodiment has mixed two kinds of prism microstructure 122 of different nature and 124, and good light extraction efficiency and view effect can be provided.
On real the work, the vertex angle theta of above-mentioned first prism microstructure 122
1Be preferably between 85 degree between 105 degree.In addition, the prism microstructure 120 on exiting surface 114 for example is a plurality of tri-prismoids that are parallel to each other, and the prism microstructure 120 that is positioned on the bottom surface 112 also can be a plurality of tri-prismoids that are parallel to each other.In the preferred embodiment, the tri-prismoid on the exiting surface 114 is orthogonal to the tri-prismoid on the bottom surface 112 in fact.
Except the foregoing description, the present invention can also change the drift angle of the prism microstructure on the exiting surface or permutation and combination is carried out other design, further specifies as follows.
Fig. 2 A is the schematic diagram of a kind of LGP of another embodiment of the present invention.Fig. 2 B is the vertical view of exiting surface of the LGP of Fig. 2 A.Please refer to Fig. 2 A, the LGP 200 of present embodiment is structurally similar with the LGP 100 of the foregoing description, and the two main difference is, the LGP 200 of present embodiment can further have a buffer area 214c on exiting surface 214.Please refer to Fig. 2 B, buffer area 214c have a plurality of prism micro-structurals 226 on the 214c of buffer area, and the drift angle of prism micro-structural 226 is between the vertex angle theta of first prism microstructure 222 between middle section 214a and outer peripheral areas 214b
1Vertex angle theta with second prism microstructure 224
2Between.Shown in Fig. 2 A, the bottom width of the bottom width of the bottom width of first prism microstructure 222, second prism microstructure 224 and prism micro-structural 226 is in fact wide in the present embodiment.In additional embodiments of the present invention, the height of the height of first prism microstructure 222, second prism microstructure 224 and the height of prism micro-structural 226 are in fact contour.First prism microstructure 122, second prism microstructure 124 and prism micro-structural 226 only are usefulness for example, and the present invention does not limit quantity, dimension scale and the distribution proportion on exiting surface thereof etc. of prism microstructure.
Present embodiment increases buffer area 214c between middle section 214a and outer peripheral areas 214b, to relax the boundary effect between middle section 214a and the outer peripheral areas 214b, make that the bright dipping of LGP 200 is more even.
In addition, the prism microstructure in the 214c of buffer area also can be made of the prism micro-structural 226 of different drift angles.That is to say that prism micro-structural 226 can have multiple drift angle, for example, except drift angle is θ
3Prism microstructure 226 outside, can also further dispose drift angle in the 214c of buffer area is θ
4The slight structure 226 of a plurality of prisms, and θ
4Greater than θ
3
In addition, in the present embodiment, the slight structure 226 of prism can also present the variation of distribution density according to the difference of its drift angle in the 214c of buffer area.For example, drift angle is θ
4The distribution density of prism micro-structural 226 in the 214c of buffer area by middle section 214a outward region 214b increase gradually.
Make and have big vertex angle theta
4The distribution density of prism micro-structural 226 in the 214c of buffer area by middle section 214a outward region 214b increase gradually, significantly visual angle problem of outer peripheral areas 214b be will help to improve, and the light extraction efficiency of excessive influence middle section 214a and the problem that can effectively improve boundary avoided.Certainly, also can select change to have less vertex angle theta in other embodiments
3The distribution density of prism micro-structural 226, to adjust the whole light extraction efficiency and the view effect of LGP 200.
Except above-mentioned mode, other embodiments of the invention can also change the drift angle of the prism micro-structural 226 in the 214c of buffer area, the drift angle angle that makes prism micro-structural 226 is with the diverse location gradual change, the drift angle that for example makes prism micro-structural 226 by middle section 214a outward region 214b increase gradually, it can reach the effect of improving light extraction efficiency and visual angle equally.
What deserves to be mentioned is that the prism microstructure in the outer peripheral areas of LGP of the present invention also can be that the prism microstructure by different drift angles combines.With regard to aforementioned a plurality of embodiment, the prism microstructure among the outer peripheral areas 114b of the LGP 100 of Figure 1A or the outer peripheral areas 214b of the LGP 200 of Fig. 2 A can have different drift angles.In other words, outer peripheral areas 114b or 214b are θ except drift angle upward
2 Second prism microstructure 124 or 224 outside, for example can also have drift angle between θ
1With θ
2Between the 4th prism microstructure 128 or 228.Wherein, the drift angle angle or the distribution density that are positioned at outer peripheral areas 114b or 214b also can have as aforesaid variation according to the demand at light extraction efficiency or visual angle, repeat no more herein.
Except the foregoing description, the present invention can also be further designs the prism microstructure of bottom surface of light guide plate, makes it have height (deeply) degree or the variation of distribution density.Below further describe for a plurality of embodiment.
Fig. 3 is along the schematic diagram of another embodiment of I-I ' line section among Figure 1A.Fig. 4 A is the schematic diagram of a kind of LGP of other embodiment of the present invention.Fig. 4 B is the profile of II-II ' line among Fig. 4 A.Fig. 3 and Fig. 4 B midship section direction are parallel to the bearing of trend of the prism microstructure on the bottom surface of light guide plate, and pass through the centre of a prism microstructure of bottom surface, with the clear height change of expressing the bottom surface of light guide plate prism microstructure.In order to simplify accompanying drawing, Fig. 3 and Fig. 4 B are not shown specifically many variations of the prism microstructure on the aforementioned exiting surface, and these contents can be with reference to the explanation of aforementioned a plurality of embodiment.
Please refer to Fig. 3, similar on the LGP 100a of present embodiment and LGP 100 of the foregoing description or 200 structures, therefore similar or can the mutual alternative part no longer do explanation for these more.Same, the prism microstructure 120 on the bottom surface 112 of the LGP 100a of present embodiment is the tri-prismoid that is parallel to each other as shown in the previous embodiment.Tri-prismoid 120a itself on the bottom surface 112 can have different height, and for instance, each the bar tri-prismoid 120a on the bottom surface 112 compared to the bottom surface 112, has the first height h corresponding to the middle section 114a of exiting surface 114 respectively
1And corresponding to the second height h of the outer peripheral areas 114b of exiting surface 114
2, wherein second the height h
2Greater than the first height h
1
In addition, please be simultaneously with reference to Fig. 4 A and Fig. 4 B, similar on the LGP 300 of present embodiment and LGP 100 of the foregoing description or 200 structures, therefore similar or can the mutual alternative part no longer do explanation for these more.It should be noted that the V-type groove 320a of prism microstructure 320 on the bottom surface 312 of LGP 300 of present embodiment, and V-type groove 320a is orthogonal to the prism microstructure 320 that is made of tri-prismoid on the exiting surface 314 in fact for being parallel to each other.A V-type groove 320a itself on the bottom surface 312 can have the different degree of depth, and for instance, compared to the bottom surface 312, each V-type groove 320a has first degree of depth v corresponding to the middle section 314a of exiting surface 314 respectively
1And corresponding to second degree of depth v of the outer peripheral areas 314b of exiting surface 314
2, and second degree of depth v
2Greater than first degree of depth v
1
From the above, embodiment shown in Fig. 3 and the 4B is according to the degree of depth that is positioned at height or the V-type groove 320a of tri-prismoid 120a on the bottom surface 112,312 the characteristic adjustment of the prism microstructure on the exiting surface 114,314, therefore can improve the narrower problem in visual angle that the last drift angle smaller prisms of middle section 114a, 314a micro-structural may cause, and improve the lower problem of light extraction efficiency that the bigger prism microstructure of the last drift angle of outer peripheral areas 114b, 314b may cause, reach the effect of compensation.
LGP 100 shown in aforementioned a plurality of embodiment, 100a, 200,300 body 110,210,310 are all parallel sheet material, yet in fact, the present invention can also adopt the sheet material of other different kenels to make LGP.Fig. 5 A and 5B have just enumerated the body 410a and the 410b of the LGP of other two kinds of forms respectively, and wherein the light conducting plate body 410a of Fig. 5 A is a wedge shape, and the thickness of the light conducting plate body 410b of Fig. 5 B is successively decreased towards central authorities gradually by the periphery.In addition, can make micro-prism structure aforementioned or that other embodiment is disclosed on the light conducting plate body 410b of the light conducting plate body 410a of Fig. 5 A and Fig. 5 B respectively.Not to micro-prism structure repeat specification, detailed content can be referring to narration relevant in this specification at this.
The present invention further proposes the backlight module of the multiple LGP of application of aforementioned.Fig. 6 is the schematic diagram of a kind of backlight module of one embodiment of the invention.Please refer to Fig. 6, the backlight module 500 of present embodiment comprises a LGP 510 and a light source group 520.LGP 510 herein can adopt above-mentioned LGP 100,100a, 200,300 or other possible light conducting plate structure of the present invention, and similar or can the mutual alternative part no longer do explanation for these more.In addition, the side 512a of the body 510a of LGP 510 is as incidence surface, and light source group 520 is a strip light source, is disposed at by the 512a of side.Light source group 520 is suitable for sending a light, and described light enters LGP 510 by side 512a.In the present embodiment, on the projection plane of parallel exiting surface 512c, the bearing of trend of light source group 520 is vertical in fact with the bearing of trend of the prism microstructure 513b of exiting surface 512c, that is to say, parallel in fact as the bearing of trend of the normal of the side 512a of incidence surface with the bearing of trend of the prism microstructure 513b of exiting surface 512c.
Fig. 7 is the schematic diagram of a kind of backlight module of another embodiment of the present invention.Please refer to Fig. 7, the backlight module 600 of present embodiment comprises a LGP 610 and a light source group 620.LGP 610 herein can adopt above-mentioned LGP 100,100a, 200,300 or other possible light conducting plate structure of the present invention equally, and similar or can the mutual alternative part no longer do explanation for these more.In addition, two side 612a that the body 610a of LGP 610 is relative and 612b are as incidence surface, and light source group 620 comprises two strip light sources, is disposed at respectively by two side 612a and the 612b.Light source group 620 is suitable for emitting beam and enters LGP 610 by side 612a and 612b.It should be noted that, in the present embodiment on the projection plane of parallel exiting surface 612c, the bearing of trend of light source group 620 is vertical in fact with the bearing of trend of the prism microstructure 613b of exiting surface 612c, that is to say, parallel in fact as the bearing of trend of the normal of the side 612a of incidence surface or 612b with the bearing of trend of the prism microstructure 613b of exiting surface 512b.
In above-mentioned a plurality of embodiment, consider that LGP 510 or 610 has the problem that light source is decayed at a distance from light source group 520 or 620, therefore can design allows the prism microstructure 513a of bottom surface 513 or 613 or the distribution density of 613a increase progressively along the direction away from incidence surface 512,612a or 612b, wherein the prism microstructure 513a of Fig. 6 is to increasing progressively along folk prescription, and the prism microstructure 613a of Fig. 7 is increased progressively towards the central authorities of LGP 610 by two incidence surface 612a and 612b, improves from light source group 520 or 620 light extraction efficiency at a distance with this.
In addition, distribution density by the prism microstructure of height, the degree of depth or the other parts of the aforementioned prism microstructure of implementing sharp LGP 510 as can be known or 610 bottom surfaces 513 or 613 also can influence light extraction efficiency, therefore can also design prism microstructure according to the configuration mode of light source group 520 or 620.For example, prism microstructure 513a on the bottom surface 513 or 613 or the height of 613a or the degree of depth increase progressively along the direction away from incidence surface 512a, 612a or 612b, just far away more from light source, the micro-structural of LGP bottom is obvious more, the variation of prism microstructure only is for example, can adjust according to actual demand.In addition, the strip light source can be fluorescent tube, light-emitting diode light bar or other phase close to sources, but is not limited thereto, and can adjust its classification according to actual demand.
Fig. 8 is the schematic diagram of a kind of backlight module of further embodiment of this invention.Fig. 9 is the schematic diagram of a kind of backlight module of other embodiment of the present invention.Please be simultaneously with reference to Fig. 8 and Fig. 9, similar on backlight module 600 structures of backlight module 700 and Fig. 7, and similar on backlight module 500 structures of backlight module 800 and Fig. 6.Therefore identical assembly is marked with identical Reference numeral, and wherein Zui Da difference is the body shape of backlight module 700,800.The thickness of backlight module 700 its light conducting plate body 610b among Fig. 8 is successively decreased towards central authorities gradually by the periphery.The light conducting plate body 610c's of backlight module 800 is shaped as a wedge shape among Fig. 9.
In addition, identical with the backlight module 600 among Fig. 7, the prism microstructure 613a of backlight module 700 bottom surfaces 613 of Fig. 8, the density of its arrangement is to be increased progressively towards the central authorities of LGP 710,810 by two incidence surface 612a and 612b, in addition, identical with the backlight module 500 among Fig. 6, the prism microstructure 613a of backlight module 800 bottom surfaces 613 of Fig. 9, the density of its arrangement is toward increasing progressively away from light source direction.With the arrangement density of this above-mentioned micro-structural, improve from light source group 620 light extraction efficiency at a distance.
In sum, the present invention makes prism microstructure on LGP, wherein has the prism microstructure of multiple different drift angles on the exiting surface of LGP, and can further design a buffering area, so that the light extraction efficiency of LGP promotes and the visual angle problem is improved.In addition, the prism microstructure of bottom surface of light guide plate cooperates the zones of different of exiting surface to do height or change in depth, makes that some has the zone of the prism microstructure of big drift angle on the exiting surface, and the problem that its light extraction efficiency is lower also can obtain compensation simultaneously.In addition, have the backlight module of above-mentioned light conducting plate structure, cooperate configured light sources, the height of the prism microstructure on the LGP, the degree of depth or distribution density also and then change, with the backlight module that adopts existing LGP in comparison, its light extraction efficiency is preferable, and mixed light is more even.
Though the present invention discloses as above with embodiment; right its is not in order to limit the present invention; the personnel that have common knowledge in the technical field under any; without departing from the spirit and scope of the present invention; can do a little change and retouching, so protection scope of the present invention is as the criterion when looking the scope that appending claims defines.
Claims (19)
1. LGP comprises:
One body, have a bottom surface, relatively this bottom surface an exiting surface and be connected in this bottom surface and this exiting surface between a plurality of sides, have a middle section and at least one outer peripheral areas on this exiting surface, described outer peripheral areas is positioned at outside this middle section; And
A plurality of prism microstructure, be positioned on this exiting surface and this bottom surface, the described a plurality of prism microstructure that wherein are positioned on this exiting surface comprise a plurality of first prism microstructure and a plurality of second prism microstructure, described a plurality of first prism microstructure is positioned at this middle section, described a plurality of second prism microstructure is positioned at this outer peripheral areas, and the vertex angle theta of described a plurality of second prism microstructure
2Vertex angle theta greater than described a plurality of first prism microstructure
1
2. LGP as claimed in claim 1, arrange the described a plurality of prism microstructure compartment of terrain that wherein is positioned on the bottom surface.
3. LGP as claimed in claim 1, the vertex angle theta of wherein said a plurality of first prism microstructure
1Between 85 degree are spent to 105.
4. LGP as claimed in claim 1, wherein this exiting surface also has a buffer area, this buffer area is between this middle section and this outer peripheral areas, and the described a plurality of prism microstructure on this exiting surface also comprise a plurality of prism micro-structurals, described a plurality of prism micro-structural is positioned at this buffer area, and the drift angle of described a plurality of prism micro-structurals is between θ
1With θ
2Between.
5. LGP as claimed in claim 4, wherein said a plurality of prism micro-structurals are to be θ by drift angle
3A plurality of prism microstructure and drift angle be θ
4A plurality of prism microstructure form and θ
4Greater than θ
3
6. LGP as claimed in claim 5, wherein drift angle is θ
4The distribution density of described a plurality of prism microstructure in this buffer area be to increase gradually towards this outer peripheral areas by this middle section.
7. LGP as claimed in claim 4, the drift angle of wherein said a plurality of prism micro-structurals is to be increased gradually towards this outer peripheral areas by this middle section.
8. LGP as claimed in claim 1, wherein the described a plurality of prism microstructure on this exiting surface also comprise a plurality of the 4th prism microstructure, described a plurality of the 4th prism microstructure is positioned at this outer peripheral areas, and the drift angle of described a plurality of the 4th prism microstructure is between θ
1With θ
2Between.
9. LGP as claimed in claim 1, wherein the described a plurality of prism microstructure on this exiting surface comprise a plurality of tri-prismoids, and described a plurality of tri-prismoid is parallel to each other.
10. LGP as claimed in claim 9, wherein the described a plurality of prism microstructure on this bottom surface comprise a plurality of tri-prismoids, and the described a plurality of tri-prismoids on this bottom surface are parallel to each other.
11. LGP as claimed in claim 10, wherein the described a plurality of tri-prismoids on this exiting surface are orthogonal to the described a plurality of tri-prismoids on this bottom surface in fact.
12. LGP as claimed in claim 10, wherein, compared to this bottom surface, the described a plurality of tri-prismoids on this bottom surface have respectively corresponding to this middle section one first the height and corresponding to this outer peripheral areas one second the height, and this second the height greater than this first the height.
13. LGP as claimed in claim 9, wherein the described a plurality of prism microstructure on this bottom surface comprise a plurality of V-type grooves, and described a plurality of V-type groove is parallel to each other.
14. LGP as claimed in claim 13, wherein the described a plurality of tri-prismoids on this exiting surface are orthogonal to the described a plurality of V-type grooves on this bottom surface in fact.
15. LGP as claimed in claim 13, wherein, compared to this bottom surface, the described a plurality of V-type grooves on this bottom surface have respectively corresponding to one first degree of depth of this middle section and corresponding to one second degree of depth of this outer peripheral areas, and this second degree of depth is greater than this first degree of depth.
16. one of them is as an incidence surface at least for LGP as claimed in claim 1, wherein said a plurality of sides, and the distribution density of the described a plurality of prism microstructure on this bottom surface is to increase progressively along the direction away from this incidence surface.
17. one of them is as an incidence surface at least for LGP as claimed in claim 1, wherein said a plurality of sides, and the height of the described a plurality of prism microstructure on this bottom surface or the degree of depth are to increase progressively along the direction away from this incidence surface.
18. a backlight module comprises:
One LGP comprises:
One body, have a bottom surface, relatively this bottom surface an exiting surface and be connected in this bottom surface and this exiting surface between a plurality of sides, have a middle section and at least one outer peripheral areas on this exiting surface, this outer peripheral areas is positioned at outside this middle section; And
A plurality of prism microstructure, be positioned on this exiting surface and this bottom surface, the described a plurality of prism microstructure that wherein are positioned on this exiting surface comprise a plurality of first prism microstructure and a plurality of second prism microstructure, described a plurality of first prism microstructure is positioned at this middle section, described a plurality of second prism microstructure is positioned at this outer peripheral areas, and the vertex angle theta of described a plurality of second prism microstructure
2Vertex angle theta greater than described a plurality of first prism microstructure
1And
One light source group is disposed at by at least one side of this body, and this light source group is suitable for sending a light, and described light enters this body by described at least one side.
19. backlight module as claimed in claim 18, wherein on a projection plane of parallel this exiting surface, the bearing of trend of this light source group is vertical in fact with the bearing of trend of described a plurality of prism microstructure of this exiting surface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101797523A CN101413641B (en) | 2008-12-03 | 2008-12-03 | Light guide plate and backlight module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101797523A CN101413641B (en) | 2008-12-03 | 2008-12-03 | Light guide plate and backlight module |
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| CN101413641A true CN101413641A (en) | 2009-04-22 |
| CN101413641B CN101413641B (en) | 2011-04-06 |
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| CN2008101797523A Active CN101413641B (en) | 2008-12-03 | 2008-12-03 | Light guide plate and backlight module |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759772A (en) * | 2012-04-18 | 2012-10-31 | 深圳市华星光电技术有限公司 | Light guide plate and corresponding backlight module |
| WO2013143094A1 (en) * | 2012-03-26 | 2013-10-03 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display |
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| CN102759772A (en) * | 2012-04-18 | 2012-10-31 | 深圳市华星光电技术有限公司 | Light guide plate and corresponding backlight module |
| TWI560479B (en) * | 2015-07-07 | 2016-12-01 | Chi Mei Corp | Light guide plate, and backlight module and liquid crystal display apparatus using the same |
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| CN105334669B (en) * | 2015-12-09 | 2018-12-28 | 青岛海信电器股份有限公司 | A kind of backlight module and liquid crystal display |
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| CN116125704A (en) * | 2022-12-29 | 2023-05-16 | 惠州华星光电显示有限公司 | Prism sheet and display module |
| WO2024139422A1 (en) * | 2022-12-29 | 2024-07-04 | 惠州华星光电显示有限公司 | Prismatic lens and display module |
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