CN103900031B - A kind of guiding device for liquid crystal display - Google Patents
A kind of guiding device for liquid crystal display Download PDFInfo
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- CN103900031B CN103900031B CN201210579594.7A CN201210579594A CN103900031B CN 103900031 B CN103900031 B CN 103900031B CN 201210579594 A CN201210579594 A CN 201210579594A CN 103900031 B CN103900031 B CN 103900031B
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- wedge shape
- light conduction
- guiding device
- shape light
- conduction board
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0028—Light guide, e.g. taper
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a kind of guiding device for liquid crystal display, comprising: cuboid LGP, described cuboid LGP has incidence surface, the basal surface adjacent with described incidence surface and the exiting surface being oppositely arranged with described basal surface; Wedge shape light conduction board, described Wedge shape light conduction board has incidence surface, the basal surface adjacent with described incidence surface, the exiting surface arranging abreast with described incidence surface and the inclined surface being oppositely arranged with described basal surface; Wherein, the incidence surface of described cuboid LGP overlaps with the exiting surface of described Wedge shape light conduction board, the basal surface of described cuboid LGP and the basal surface of described Wedge shape light conduction board are coplanar, and the inclined surface of described Wedge shape light conduction board is formed slopely the face of cylinder of evagination gradually to the exiting surface of described Wedge shape light conduction board from the incidence surface of described Wedge shape light conduction board. The guiding device that the present invention proposes, by the inclined plane of Wedge shape light conduction board being become to the inclined surface of evagination, has reduced the light leak of described Wedge shape light conduction board.
Description
Technical field
The present invention relates to technical field of liquid crystal display, especially relate to a kind of dress of the leaded light for liquid crystal displayPut.
Background technology
Existing liquid crystal indicator comprises display panels and backlight module, display panels conventionallyBe by thin film transistor base plate, colored filter substrate and be disposed at the liquid crystal layer institute structure between these two substratesBecome, backlight module is to be used to provide the required light source of this display panels.
Guiding device (LightGuidePlate, referred to as LGP) is that in backlight module is importantAssembly, Main Function be the light that sends of guiding light source by a plane outgoing, improve display panels simultaneouslyGlorious degrees and the uniformity of luminosity. In existing small-medium size liquid crystal indicator, wedge shape leaded lightDevice can be realized the lightening design of backlight modular structure. Fig. 1 is existing wedge shape guiding device 100Front view. As shown in Figure 1, can incide wedge shape guiding device 100 from the light of LED light source 102And by exiting surface 101 outgoing of wedge shape guiding device 100. But, incide wedge shape guiding device 100The light of tapered plane 103 exists from tapered plane 103 and reflects away and cause wedge shape guiding device 100 light leaksProblem. For example, incide wedge shape guiding device 100 from light A, B, the C of LED light source 102Tapered plane 103, when wherein light A, B march to tapered plane 103, because its incident angle is less than light at wedgeThe angle of total reflection of the tapered plane 103 of shape guiding device 100 and reflecting away from tapered plane 103, thus causeWedge shape guiding device 100 light leaks, cause the bright dipping regional luminance of backlight module to reduce, and have finally affected liquid crystalThe display performance of display floater.
Summary of the invention
The object of the invention is to propose a kind of improved guiding device for liquid crystal display, can makeDescribed guiding device has less light leak rate and higher light emission rate.
For achieving the above object, the present invention is achieved through the following technical solutions:
For a guiding device for liquid crystal display, comprising:
Cuboid LGP, described cuboid LGP has incidence surface, the end adjacent with described incidence surface tableFace and the exiting surface being oppositely arranged with described basal surface;
Wedge shape light conduction board, described Wedge shape light conduction board have incidence surface, the basal surface adjacent with described incidence surface,The exiting surface arranging abreast with described incidence surface and the inclined surface being oppositely arranged with described basal surface;
Wherein, the incidence surface of described cuboid LGP overlaps with the exiting surface of described Wedge shape light conduction board, described inThe basal surface of cuboid LGP and the basal surface of described Wedge shape light conduction board are coplanar, the inclining of described Wedge shape light conduction boardSkewed surface from the incidence surface of described Wedge shape light conduction board to the exiting surface of described Wedge shape light conduction board is formed slopely graduallyThe protruding face of cylinder.
Further, described cuboid LGP and described Wedge shape light conduction board are by polymethyl methacrylate(PMMA) make.
Further, the inclined surface of described Wedge shape light conduction board has the vertical section of circular shape, described circleDistance between the radius of curvature of arc and the incidence surface of described Wedge shape light conduction board and the exiting surface of described Wedge shape light conduction boardFrom ratio in 2.125 to 6.875 scope.
Further, the radius of curvature of described circular arc and the incidence surface of described Wedge shape light conduction board and described wedge shape are ledThe ratio of the distance between the exiting surface of tabula rasa is 3.375.
Further, described guiding device also comprise be arranged at described cuboid LGP basal surface and described inReflecting plate under the basal surface of Wedge shape light conduction board.
Further, described guiding device also comprises the diffusion on the exiting surface that is arranged at cuboid LGPPlate.
Further, described guiding device also comprises the brightness enhancement film being arranged on described diffuser plate.
Further, described cuboid LGP and described Wedge shape light conduction board integrated molding.
Correspondingly, the invention allows for another guiding device for liquid crystal display, described leaded lightDevice comprises:
Cuboid LGP, described cuboid LGP has incidence surface, the end adjacent with described incidence surface tableFace and the exiting surface being oppositely arranged with described basal surface;
Wedge shape light conduction board, described Wedge shape light conduction board have incidence surface, the basal surface adjacent with described incidence surface,The exiting surface arranging abreast with described incidence surface and the inclined surface being oppositely arranged with described basal surface;
Wherein, the incidence surface of described cuboid LGP overlaps with the exiting surface of described Wedge shape light conduction board, described inThe basal surface of cuboid LGP and the basal surface of described Wedge shape light conduction board are coplanar, the inclining of described Wedge shape light conduction boardSkewed surface from the incidence surface of described Wedge shape light conduction board to the exiting surface of described Wedge shape light conduction board is formed slopely graduallyProtruding inclined surface, described inclined surface has the vertical section of V-arrangement.
Further, the angle between two of the vertical section of described V-arrangement limits is greater than 120 degree.
Further, described cuboid LGP and described Wedge shape light conduction board are by polymethyl methacrylate(PMMA) make.
Further, described guiding device also comprise be arranged at described cuboid LGP basal surface and described inReflecting plate under the basal surface of Wedge shape light conduction board.
Further, described guiding device also comprises the diffusion on the exiting surface that is arranged at cuboid LGPPlate.
Further, described guiding device also comprises the brightness enhancement film being arranged on described diffuser plate.
Further, described cuboid LGP and described Wedge shape light conduction board integrated molding.
Correspondingly, the invention allows for a kind of liquid crystal display, described liquid crystal display has as with topGuiding device described in case.
The guiding device that the present invention proposes, by the tapered plane from prior art by the inclined plane of Wedge shape light conduction boardBecome the inclined surface of evagination, make the incidence angle of light of the inclined surface that marches to described Wedge shape light conduction board largeProduce total reflection in light in the angle of total reflection of described inclined surface, so not only reduced described wedge shape and ledThe light leak of tabula rasa, can also improve the utilization rate of light at described guiding device, and described guiding device is facedThe required brightness in angle is improved.
Brief description of the drawings
Fig. 1 is the front view of existing wedge shape guiding device;
Fig. 2 is according to the three-dimensional view of the guiding device for liquid crystal display of first embodiment of the invention;
Fig. 3 is according to the front view of the guiding device for liquid crystal display of first embodiment of the invention;
Fig. 4 be light according to the refraction on the inclined surface of the guiding device of first embodiment of the invention withThe comparison schematic diagram of the refraction on the tapered plane of prior art guiding device;
Fig. 5 is the front view of four kinds of guiding devices;
Fig. 6 is light leak and the bright dipping comparative analysis figure of four kinds of guiding devices of Fig. 5 of emulation acquisition;
Fig. 7 is the light leak of four kinds of guiding devices and the graph of relation of bright dipping of Fig. 5 of emulation acquisition;
Fig. 8 is the schematic diagram of advancing of light in two kinds of different guiding devices;
Fig. 9 is according to the three-dimensional view of the guiding device for liquid crystal display of second embodiment of the invention;
Figure 10 is according to the front view of the guiding device for liquid crystal display of second embodiment of the invention;
Figure 11 is according to the front view of the guiding device for liquid crystal display of third embodiment of the invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail. Be understandable that, thisLocate described specific embodiment only for explaining the present invention, but not limitation of the invention. Also need in additionBe noted that for convenience of description, in accompanying drawing, only show part related to the present invention but not all knotStructure.
The first embodiment of the present invention has been shown in Fig. 2-4.
Fig. 2 is according to the stereopsis of the guiding device 200 for liquid crystal display of first embodiment of the inventionFigure; Fig. 3 is according to the front view of the guiding device 200 for liquid crystal display of first embodiment of the invention.As shown in Figure 3, the guiding device 200 described in the present embodiment comprises: cuboid LGP 220 and wedge shape are ledTabula rasa 210. Described cuboid LGP 220 has incidence surface 224, the end adjacent with described incidence surface 224Surface 223 and the exiting surface 221 being oppositely arranged with described basal surface 223. And described Wedge shape light conduction board 210There is incidence surface 212, the basal surface 213 adjacent with described incidence surface 212, parallel with described incidence surface 212The exiting surface 214 that ground arranges and the inclined surface 211 being oppositely arranged with described basal surface 213. Wherein, instituteState the incidence surface 224 of cuboid LGP 220 and the exiting surface 214 of described Wedge shape light conduction board 210 overlaps,The basal surface 223 of described cuboid LGP 220 is coplanar with the basal surface 213 of described Wedge shape light conduction board 210,The inclined surface 211 of described Wedge shape light conduction board 210 is from the incidence surface 212 of described Wedge shape light conduction board 210 to instituteThe exiting surface 214 of stating Wedge shape light conduction board 210 is formed slopely the face of cylinder of evagination gradually.
In the first embodiment, described cuboid LGP 220 and described Wedge shape light conduction board 210 are by poly-methylMethyl acrylate (PMMA) is made. As the preferred mode of one, can integrated molding described in cuboidLGP 220 and described Wedge shape light conduction board 210.
In a preferred embodiment of the present embodiment, described Wedge shape light conduction board 210 can also comprise a waterFlat connecting portion 240, this level connection joint portion 240 is from incidence surface 212, the basal surface of described Wedge shape light conduction board 210213 extend to light source 230. By means of this level connection joint portion 240, the light that is derived from light source 230 is by betterBe directed in described guiding device 200, thereby contribute to be increased in the luminous flux in guiding device 200.
In the first embodiment, by by the inclined surface of described Wedge shape light conduction board 210 211 from prior artWedge shape tapered plane become the face of cylinder of the evagination with radian, make to march to described Wedge shape light conduction board 210The incidence angle of the light of inclined surface 211 is greater than light and produces in the angle of total reflection of described inclined surface 211Total reflection, so not only can reduce the light leak of described Wedge shape light conduction board 210, can also improve light in instituteState the utilization rate of guiding device 200, the required brightness in positive visual angle of described guiding device 200 is improved.
Fig. 4 is light according on the inclined surface 211 of the guiding device 200 of first embodiment of the inventionThe comparison schematic diagram of refraction and the refraction on the tapered plane 261 of prior art guiding device. In Fig. 2-3On basis, further referring to Fig. 4, described Wedge shape light conduction board 210 is by polymethyl methacrylate (PMMA) materialMake, and the medium refraction index of this PMMA material is 1.4935, the angle of total reflection is 43.352 °. At Fig. 4In, when the light a of the inclined plane of directive Wedge shape light conduction board 210 upside arrives the oblique of prior art guiding deviceWhen plane 261, the normal angle of light a and tapered plane 261 is 42 ° (being less than the angle of total reflection), light aThereby will cause light leak through tapered plane 261. And when the inclined plane upside of directive Wedge shape light conduction board 210When light a arrives according to the inclined surface 211 of first embodiment of the invention, with inclined surface (curved surface) 211The angle of normal be 48 ° (being greater than the angle of total reflection), therefore light a will be totally reflected back Wedge shape light conduction board210 inside, can not cause light leak.
Continue referring to Fig. 4, when the light b of the inclined plane of directive Wedge shape light conduction board 210 downside arrives prior artWhen the tapered plane 261 of guiding device, with the normal angle of plane be 66 °, be greater than the angle of total reflection, therefore lightLine b will be totally reflected go back to Wedge shape light conduction board 210 inside; Arrive the first reality according to the present invention and work as light bWhile executing routine inclined surface 211, with the angle of the normal of inclined surface (curved surface) 211 be 60 °, stillBe greater than the angle of total reflection, therefore light b also will be totally reflected go back to Wedge shape light conduction board 210 inside. That is to say,Although the normal of the light b of the inclined plane downside of directive Wedge shape light conduction board 210 and inclined surface (curved surface) 211The angle forming is less with the angle that tapered plane 261 forms than light b, but due to these two anglesAll be greater than the angle of total reflection, so light b can be reflected back toward Wedge shape light conduction board 210 inside, thereby can not makeThe light leak of wedgewise LGP 210.
Fig. 5-Fig. 8 is adopting for existing guiding device with according to the guiding device of first embodiment of the inventionUnder prerequisite with identical manufactured materials, emulation obtains the comparison diagram of every optical parametric. At this, adopt simulationSoftware (for example Tracepro simulation softward) carries out the optical characteristics of four kinds of guiding device LGP1-LGP4Emulation.
Fig. 5 shows the front view of four kinds of guiding device LGP1-LGP4, and wherein, LGP1 is prior artGuiding device; And LGP2-LGP4 is the guiding device according to first embodiment of the invention, difference is onlyThe radius of curvature difference of inclined surface (curved surface). As shown in Figure 5, the inclined surface (song of guiding device LGP2Face) radius of curvature R be 5.5mm, the radius of curvature R of the inclined surface (curved surface) of guiding device LGP3For 2.7mm, and the radius of curvature R of the inclined surface of guiding device LGP4 (curved surface) is 1.7mm. Fig. 5Four kinds of guiding devices of shown this are to be all made up of PMMA material, and its medium refraction index is 1.4935, total reflectionAngle is 43.352 °, and the distance between incidence surface and the exiting surface of the Wedge shape light conduction board of these four kinds of guiding devices allThat long measure in 0.8mm(Fig. 5 is mm).
Fig. 6 is light leak and the bright dipping comparative analysis figure of four kinds of guiding device LGP1-LGP4 of emulation acquisition. RootContrast according to the every optical data in Fig. 6 is known, and guiding device LGP1 occurs in the region of Wedge shape light conduction boardMore light leak, and guiding device LGP2-LGP4 is relatively less at the light leak in the region of Wedge shape light conduction board,Embody good guiding device optical characteristics. Especially, the region of the Wedge shape light conduction board of guiding device LGP3Light leak amount minimum, effectively amount of light maximum, is most suitable Wedge shape light conduction board design in these four kinds of guiding devices.
Fig. 7 is the light leak of four kinds of guiding device LGP1-LGP4 and the graph of relation of bright dipping that emulation obtains.Wherein, transverse axis represents this four kinds of guiding device LGP1-LGP4, and the longitudinal axis represents the Wedge shape light conduction board district of guiding deviceThe light leak amount in territory, unit is watt (W). Known according to two curve comparisons in Fig. 7, the inclining of Wedge shape light conduction boardInclined-plane becomes curved surface from tapered plane, can effectively reduce the light leak amount in Wedge shape light conduction board region, increases leaded light dressThe effective amount of light of visible area of putting. For example,, according to the guiding device LGP2-LGP4 of first embodiment of the inventionCompared with existing guiding device LGP1, reduce to some extent the light leak amount in Wedge shape light conduction board region, outstandingIt is guiding device LGP3, aspect light leak amount and effective two parameters of bright dipping, has embodied larger data excellentGesture, demonstrates effective enhancing of the optical property to guiding device.
Further can find out from the emulated data shown in Fig. 6 and Fig. 7, according to first embodiment of the inventionThe curvature of the inclined surface (curved surface) of guiding device is not the bigger the better, and exists an optimum curvature to makeThe light leakage effect minimum in Wedge shape light conduction board region. For example, the inclined surface of guiding device LGP4 (curved surface)The curvature of ratio of curvature guiding device LGP3 is larger, but the leakage in the Wedge shape light conduction board region of guiding device LGP4Optical issue is more serious. The reason of above-mentioned light leak problem can be with further reference to the explanation to Fig. 8, and Fig. 8 illustratesThe schematic diagram of advancing of light in guiding device LGP3 and guiding device LGP4. Can from Fig. 8Go out, same light a can penetrate Wedge shape light conduction board region and cause light leak in guiding device LGP4, and is leadingRe-used thereby can be totally reflected back in electro-optical device LGP3 in Wedge shape light conduction board. So, in practiceIn, can radius of curvature R of initial setting, make light a and surface normal angle be slightly larger than the angle of total reflection,Slight modification radius of curvature R again or other parameter are done simulation relatively, can find out very soon optimal curvatures radius RScheme.
To sum up, according to the guiding device LGP2-LGP4 of first embodiment of the invention and existing guiding device LGP1Compare, not only effectively reduced the light leak amount in Wedge shape light conduction board region, can also strengthen to some extentThe optical property of guiding device.
Fig. 9-10 show the second embodiment of the present invention.
Fig. 9 is according to the stereopsis of the guiding device 900 for liquid crystal display of second embodiment of the inventionFigure; Figure 10 is according to the front view of the guiding device 900 for liquid crystal display of second embodiment of the invention.As shown in figure 10, the guiding device 900 described in the present embodiment comprises: cuboid LGP 920 and wedge shape are ledTabula rasa 910. Described cuboid LGP 920 has incidence surface 924, the end adjacent with described incidence surface 924Surface 923 and the exiting surface 921 being oppositely arranged with described basal surface 923. And described Wedge shape light conduction board 910There is incidence surface 912, the basal surface 913 adjacent with described incidence surface 912, parallel with described incidence surface 912The exiting surface 914 that ground arranges and the inclined surface 911 being oppositely arranged with described basal surface 913. Wherein, instituteState the incidence surface 924 of cuboid LGP 920 and the exiting surface 914 of described Wedge shape light conduction board 910 overlaps,The basal surface 923 of described cuboid LGP 920 is coplanar with the basal surface 913 of described Wedge shape light conduction board 910,The inclined surface 911 of described Wedge shape light conduction board 910 is from the incidence surface 912 of described Wedge shape light conduction board 910 to instituteThe exiting surface 914 of stating Wedge shape light conduction board 910 is formed slopely the inclined surface of evagination, described inclined surface gradually911 have the vertical section of V-arrangement.
In a second embodiment, described cuboid LGP 920 and described Wedge shape light conduction board 910 are by poly-methylMethyl acrylate (PMMA) is made. As the preferred mode of one, can integrated molding described in cuboidLGP 920 and described Wedge shape light conduction board 910.
In a preferred embodiment of the present embodiment, described Wedge shape light conduction board 910 can also comprise a waterFlat connecting portion 940, this level connection joint portion 940 is by incidence surface 912, the basal surface of described Wedge shape light conduction board 910913 extend to light source 930. By means of this level connection joint portion 940, the light that is derived from light source 930 is by betterBe directed in described guiding device 900, thereby further increased the luminous flux in guiding device 900.
As can be seen from Figure 10, different from the first embodiment, described inclination in a second embodimentSurface 911 is not the face of cylinder of evagination but has the vertical section of V-arrangement. Preferably, described V-arrangement is perpendicularAngle β between two limits of straightforward face is greater than 120 degree.
In a second embodiment, by by the inclined surface of described Wedge shape light conduction board 910 911 from prior artTapered plane become the inclined surface of the evagination of the vertical section with V-arrangement, make to march to described wedge shape leaded lightThe incidence angle of the light of the inclined surface 911 of plate 910 is greater than the total reflection of light at described inclined surface 911Angle and produce total reflection, so not only can reduce the light leak of described Wedge shape light conduction board 910, can also improveLight, in the utilization rate of described guiding device 900, makes the required brightness in positive visual angle of described guiding device 900Be improved.
Figure 11 shows the third embodiment of the present invention.
Figure 11 is facing according to the guiding device 1100 for liquid crystal display of third embodiment of the inventionFigure. As shown in figure 11, the guiding device 1100 described in the present embodiment comprises: cuboid LGP 1120 HesWedge shape light conduction board 1110. Described cuboid LGP 1120 have incidence surface 1124, with described incidence surface 1124Adjacent basal surface 1123 and the exiting surface 1121 being oppositely arranged with described basal surface 1123. And described wedgeShape LGP 1110 has incidence surface 1112, basal surface 1113 and the institute adjacent with described incidence surface 1112State exiting surface 1114 that incidence surface 1112 arranges abreast and with inclining that described basal surface 1113 is oppositely arrangedSkewed surface 1111. Wherein, the incidence surface 1124 and described Wedge shape light conduction board of described cuboid LGP 11201110 exiting surface 1114 overlaps, and basal surface 1123 and the described wedge shape of described cuboid LGP 1120 are ledThe basal surface 1113 of tabula rasa 1110 is coplanar, and the inclined surface 1111 of described Wedge shape light conduction board 1110 is from describedThe incidence surface 1112 of Wedge shape light conduction board 1110 inclines gradually to the exiting surface 1114 of described Wedge shape light conduction board 1110The face of cylinder of oblique one-tenth evagination.
In the 3rd embodiment, cuboid LGP 1120, Wedge shape light conduction board in above-mentioned guiding device 11001110 is identical with the corresponding light conducting plate structure in the first embodiment, do not repeat them here.
As can be seen from Figure 11, different from the first embodiment, the guiding device in the 3rd embodiment1100 also comprise: the basal surface 1123 and the described Wedge shape light conduction board that are arranged at described cuboid LGP 1120Reflecting plate 1160 under 1110 basal surface 1113; And be arranged at the bright dipping of cuboid LGP 1120Diffuser plate 1180 on face 1121. As the preferred mode of one, described guiding device 1100 also comprisesBe arranged at the brightness enhancement film 1190 on described diffuser plate 1180.
By above-mentioned guiding device 1100 is increased to reflecting plate 1160, diffuser plate 1180 and brightness enhancement film 1190,Can further optimize the optical property of described guiding device 1100.
In addition, the invention allows for a kind of liquid crystal display, described liquid crystal display have as above first,The guiding device that one of second, third embodiment is described.
The guiding device that the present invention proposes, by the tapered plane from prior art by the inclined plane of Wedge shape light conduction boardBecome the inclined surface of evagination, make the incidence angle of light of the inclined surface that marches to described Wedge shape light conduction board largeProduce total reflection in light in the angle of total reflection of described inclined surface, so not only reduced described wedge shape and ledThe light leak of tabula rasa, can also improve the utilization rate of light at described guiding device, and described guiding device is facedThe required brightness in angle is improved.
Note, above are only preferred embodiment of the present invention and institute's application technology principle. Those skilled in the artWill appreciate that, the invention is not restricted to specific embodiment described here, can enter for a person skilled in the artThe various obvious variations of row, readjust and substitute and can not depart from protection scope of the present invention. Therefore, thoughSo by above embodiment, the present invention is described in further detail, but the present invention be not limited only toUpper embodiment, in the situation that not departing from the present invention's design, can also comprise more other equivalent embodiment,And scope of the present invention is determined by appended claim scope.
Claims (8)
1. for a guiding device for liquid crystal display, comprising:
Cuboid LGP, described cuboid LGP has incidence surface, the end adjacent with described incidence surface tableFace and the exiting surface being oppositely arranged with described basal surface;
Wedge shape light conduction board, described Wedge shape light conduction board have incidence surface, the basal surface adjacent with described incidence surface,The exiting surface arranging abreast with described incidence surface and the inclined surface being oppositely arranged with described basal surface;
Wherein, the incidence surface of described cuboid LGP overlaps with the exiting surface of described Wedge shape light conduction board, described inThe basal surface of cuboid LGP and the basal surface of described Wedge shape light conduction board are coplanar, the inclining of described Wedge shape light conduction boardSkewed surface from the incidence surface of described Wedge shape light conduction board to the exiting surface of described Wedge shape light conduction board is formed slopely graduallyThe protruding face of cylinder, and the inclined surface of described Wedge shape light conduction board has the vertical section of circular shape, described inBetween the radius of curvature of circular arc and the incidence surface of described Wedge shape light conduction board and the exiting surface of described Wedge shape light conduction boardThe ratio of distance is in 2.125 to 6.875 scope.
2. the guiding device for liquid crystal display according to claim 1, is characterized in that, described inCuboid LGP and described Wedge shape light conduction board are made up of polymethyl methacrylate (PMMA).
3. the guiding device for liquid crystal display according to claim 1, is characterized in that, described inBetween the radius of curvature of circular arc and the incidence surface of described Wedge shape light conduction board and the exiting surface of described Wedge shape light conduction boardThe ratio of distance is 3.375.
4. according to the guiding device for liquid crystal display described in claim 1-3, it is characterized in that instituteStating guiding device also comprises and is arranged at the basal surface of described cuboid LGP and the end of described Wedge shape light conduction board tableReflecting plate under face.
5. according to the guiding device for liquid crystal display described in claim 1-3, it is characterized in that instituteState guiding device and also comprise the diffuser plate on the exiting surface that is arranged at cuboid LGP.
6. the guiding device for liquid crystal display according to claim 5, is characterized in that, described inGuiding device also comprises the brightness enhancement film being arranged on described diffuser plate.
7. according to the guiding device for liquid crystal display described in claim 1-3, it is characterized in that instituteState cuboid LGP and described Wedge shape light conduction board integrated molding.
8. a liquid crystal display, has the guiding device as described in one of above claim 1-7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210579594.7A CN103900031B (en) | 2012-12-27 | 2012-12-27 | A kind of guiding device for liquid crystal display |
| CN201510930661.9A CN105511008B (en) | 2012-12-27 | 2012-12-27 | A kind of guiding device for liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210579594.7A CN103900031B (en) | 2012-12-27 | 2012-12-27 | A kind of guiding device for liquid crystal display |
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| CN201510930661.9A Division CN105511008B (en) | 2012-12-27 | 2012-12-27 | A kind of guiding device for liquid crystal display |
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| Publication Number | Publication Date |
|---|---|
| CN103900031A CN103900031A (en) | 2014-07-02 |
| CN103900031B true CN103900031B (en) | 2016-05-11 |
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| CN201210579594.7A Active CN103900031B (en) | 2012-12-27 | 2012-12-27 | A kind of guiding device for liquid crystal display |
| CN201510930661.9A Active CN105511008B (en) | 2012-12-27 | 2012-12-27 | A kind of guiding device for liquid crystal display |
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| CN201510930661.9A Active CN105511008B (en) | 2012-12-27 | 2012-12-27 | A kind of guiding device for liquid crystal display |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104848089A (en) * | 2015-05-14 | 2015-08-19 | 武汉华星光电技术有限公司 | Backlight module and display device |
| CN106707399B (en) | 2015-08-14 | 2019-09-06 | 瑞仪光电(苏州)有限公司 | Light guiding film, backlight module |
| CN106873071B (en) * | 2017-03-27 | 2019-10-11 | 开发晶照明（厦门）有限公司 | Planar light source device, side entrance back module and display device |
| CN107703581A (en) * | 2017-09-30 | 2018-02-16 | 长沙市宇顺显示技术有限公司 | A kind of light guide plate and backlight module |
| CN110208898B (en) * | 2019-05-31 | 2020-11-20 | 内蒙古中森智能终端技术研发有限公司 | High-luminous-efficiency end face light guide plate for backlight module and preparation process thereof |
| CN110927859A (en) * | 2019-12-31 | 2020-03-27 | 惠州市龙祥兴科技有限公司 | Light guide plate capable of filtering blue light |
| CN115542611B (en) * | 2022-11-25 | 2023-03-17 | 惠科股份有限公司 | Backlight module and display device |
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| CN105511008A (en) | 2016-04-20 |
| CN105511008B (en) | 2018-12-18 |
| CN103900031A (en) | 2014-07-02 |
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