CN102928911A - Light guide plate and manufacturing method of light guide plate as well as backlight module and display device - Google Patents
Light guide plate and manufacturing method of light guide plate as well as backlight module and display device Download PDFInfo
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- CN102928911A CN102928911A CN2012104187785A CN201210418778A CN102928911A CN 102928911 A CN102928911 A CN 102928911A CN 2012104187785 A CN2012104187785 A CN 2012104187785A CN 201210418778 A CN201210418778 A CN 201210418778A CN 102928911 A CN102928911 A CN 102928911A
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Abstract
The invention relates to the technical field of display and particularly relates to a light guide plate capable of utilizing a micro-penetration surface to collect light and a manufacturing method of the light guide plate as well as a backlight module and a display device. An emergent surface of the light guide plate is the micro-penetration surface; the micro-penetration surface comprises a plurality of micro-penetration points and the micro-penetration points are provided with convex surfaces; and the bottom surface of the light guide plate is a net surface and the net surface comprises a plurality of net points and the net points are provided with convex surfaces. The manufacturing method of the light guide plate comprises the steps of: presetting a micro-penetration point distribution pattern by a precision engraving machine; putting a micro-penetration surface die core base plate into a precision engraving machine; engraving the micro-penetration surface die core base plate into a micro-penetration face die core according to the micro-penetration point distribution pattern; assembling the micro-penetration surface die core and a light guide plate die core into a light guide plate die; and injecting and molding into the light guide plate by the light guide plate die. A micro-penetration surface design is adopted and directions of all scattering lights in the light guide plate can be adjusted by using the micro-penetration surface to collect the scattering lights; and the development brightness and the influence definition of a liquid crystal liquid screen are improved and the product quality is improved.
Description
Technical field
The present invention relates to the display technique field, relate in particular to a kind of light guide plate and manufacture method, backlight module and display device of utilizing little face to realize optically focused.
Background technology
Because liquid crystal molecule itself does not possess luminous power, therefore need to add light source in the existing liquid crystal display and obtain display frame.Different backlights according to the light source relative position are divided into side entering type and straight-down negative.In the side entrance back structure, light source is placed on the light guide plate side, and the light source that the lamp bar sends is directly injected in the light guide plate; The light guide plate major function is that the directional light with side incident converts planar light to.In the downward back photo structure, light source is laid liquid crystal panel below, and the light that light source sends becomes area source and emits through after the diffusion of one section space length and diffuser plate, mixing.
At least one side of light guide plate arranges light source in the side entrance back module, and this can cause the light of exit facet of light guide plate inhomogeneous; Bright near the light source place, and dark away from the light source place; For addressing this is that, prior art is at bottom surface of light guide plate the site to be set, and utilizes the diffuse reflection principle by the site total reflection light in the light guide plate to be scattered out, to adjust the uniformity coefficient of light; Although this problem that can solve to a certain extent light guide plate exit facet bright and dark light inequality with the light guide plate of site, but this kind light guide plate is thorough not to the adjustment of briliancy, and because the direction of scattered beam is too disperseed, light can't converge, cause the light guide plate display brightness not high, and then cause the image of LCDs unintelligible; At present, manufacturing is a lot of with the process of dot light guide plate, normally utilizes diamond cutter at copper mold benevolence substrate processing wire side die, obtains light guide plate through ejection formation, but the used copper mold benevolence substrate hardness of this kind process is poor, the casting life-span is low, can't reach the volume production requirement; If, then can cause the problem that the engraving precision is not high, the die face is coarse of die, thereby make the light guide plate mesh point face that utilizes this die output coarse this die substrate engraving with diamond cutter, can't reach quality requirements; Because light guide plate is higher to accuracy requirement, so this kind process also can't be made it at present; For above deficiency, the present invention is badly in need of providing a kind of new light guide plate and the manufacture method of this light guide plate.
Summary of the invention
The purpose of this invention is to provide a kind of light guide plate and manufacture method thereof, described manufacture method utilizes carving machine and buffing machine to produce the high precision die, utilize this die to produce light guide plate with little face, utilize this little ejaculation direction in the face of scattered beam to adjust, scattered beam is converged; Realize improving the purpose of brightness with this.
The objective of the invention is to be achieved through the following technical solutions: a kind of light guide plate, comprise the light guide plate base material, described light guide plate base material comprises that the plane of incidence in order to receiving beam, a bottom surface, that links to each other with the plane of incidence link to each other with the plane of incidence and the exit facet relative with the bottom surface, a side relative with the plane of incidence and the two sides that all the other are relative, it is characterized in that: described light guide plate exit facet is little face, described little face comprises a plurality of little points, and this little point is provided with outer convex surface; Described bottom surface of light guide plate is wire side, and described wire side comprises a plurality of sites, and this site is provided with outer convex surface.
Described little face is the little face of array.
A kind of manufacture method of light guide plate said method comprising the steps of:
S1, the default little some distribution plan of carving machine;
S2, with little face mould benevolence substrate carving machine of packing into;
S3, carving machine are engraved as little face mould benevolence according to little some distribution plan with little face mould benevolence substrate;
S4, little face mould benevolence and light guiding board mould core are assembled into light-conducting board mold;
S5, light-conducting board mold are through the ejection formation light guide plate.
Between described step S3 and S4, also comprise the step of utilizing buffing machine that little face mould benevolence is polished.
In described step S4, also comprise the step that wire side die, little face mould Renhe light guiding board mould core is assembled into light-conducting board mold.
Further comprising the steps of in described step S5:
S51, light-conducting board mold and injection machine are installed;
S52, setting injection machine condition of molding parameter.
Described carving machine is provided with support, gearshift erecting bed, space displacement device, substrate erecting bed and finishing impression drill bit from the bottom to top successively.
Described buffing machine comprises base and the frame that is installed on the base, in this frame buff spindle is installed, and correspondence is provided with the die translation stage below this buff spindle.
A kind of backlight module comprises above-mentioned any described light guide plate.
A kind of display device comprises described backlight module.
The present invention compared with prior art has advantages of following:
1, the present invention adopts the design of little face, utilizes this little direction in the face of all scattered beams in the light guide plate to adjust, and scattered beam is converged; Increase the video picture brightness of LCDs and affect sharpness, improved product quality.
2, the present invention adopts little point to be provided with the design of outer convex surface, utilize convex lens optically focused principle, many the scattered beams that are different trends that enter little point are crossed, the brightness of Effective Raise light guide plate exit facet, thus increase the video picture brightness of LCDs and affect sharpness; Improved product quality.
3, the present invention adopts the design of site, utilizes the irreflexive principle of uneven surface, the total reflection light of injecting in the light guide plate can be adjusted into diffuse light; The diffuse light that will enter each site by reflector plate reflects the exit facet of light guide plate; The layout of this site can effectively reduce the luminance difference of light guide plate light in part and exit facet, the brightness of whole raising exit facet; Improved the quality of LED flat lamp.
4, the present invention adopts carving machine little face mould benevolence substrate to be engraved as the step of little face mould benevolence; Improve engraving precision and the carving speed of die, realized die engraving automatic batch production.
5, the present invention adopts the design of stainless steel die base material, but the hardness of the little face mould benevolence of Effective Raise can be repeatedly used it, and has effectively guaranteed its engraving precision; Save cost, improved output, further realized die engraving automatic batch production.
6, the step that adopts buffing machine that little face mould benevolence is polished among the present invention, utilize banister brush spare that little face mould benevolence is carried out polishing operation, make it Paint Gloss, the little face of light guide plate that the little face mould benevolence of employing after polishing produces is more moist, make the convex surface of little point more mellow and fuller, the scattered beam that enters little point with assurance can be because of the coarse rough rescattering that causes of its convex surface; Thereby Effective Raise the processing quality of light guide plate, improved product quality.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the structural representation (front view) of light guide plate among the present invention;
Fig. 2 is the structural representation (vertical view) of light guide plate among the present invention;
Fig. 3 is the structural representation (upward view) of light guide plate among the present invention;
Fig. 4 is the FB(flow block) of method for manufacturing light guide plate among the present invention;
Fig. 5 is the structural representation (front view) of carving machine among the present invention;
Fig. 6 is the structural representation (front view) of buffing machine among the present invention;
Fig. 7 is the structural representation of light-conducting board mold among the present invention.
Embodiment
Referring to Fig. 1, Fig. 2, shown in Figure 3, a kind of light guide plate in the present embodiment, comprise the light guide plate base material, described light guide plate base material comprises that the plane of incidence in order to receiving beam, a bottom surface, that links to each other with the plane of incidence link to each other with the plane of incidence and the exit facet relative with the bottom surface, a side relative with the plane of incidence and the two sides that all the other are relative, and the exit facet on this light guide plate top is provided with little face 1; Described little face comprises a plurality of equally distributed little points 2; This little point is provided with outer convex surface, and this outer convex surface is an arc mirror surface that can play the optically focused effect; The present invention adopts the design of little face, utilizes this little direction in the face of all scattered beams in the light guide plate to adjust, and scattered beam is converged; Increase the video picture brightness of LCDs and affect sharpness, improved product quality.Adopt little point to be provided with the design of outer convex surface, utilize convex lens optically focused principle, many the scattered beams that are different trends that enter little point are converged, the brightness of Effective Raise light guide plate exit facet, thus increase the video picture brightness of LCDs and affect sharpness; Improved product quality.
The bottom of light guide plate described in the present embodiment is provided with wire side 3; Described wire side comprises a plurality of sites 4, and this site is provided with outer convex surface; Described dot shape is circle, V-arrangement etc., is circular in the present embodiment; This site is designed according to optical principle, site described in the present embodiment is the crisscross formed circular shaped lattice point of rectangular array, the equal in length of described rectangular array longitudinal length and light guide plate, this rectangular array lateral length equates with the width of light guide plate, and the size of described rectangular array and site spacing can be regulated according to LED arrangement pitches and required brightness.The present invention adopts the light guide plate bottom face to lay the design of site, utilizes the irreflexive principle of uneven surface, the total reflection light of injecting in the light guide plate can be adjusted into diffuse light; The diffuse light that will enter each site by reflector plate reflects the exit facet of light guide plate; The layout of this site can effectively reduce the luminance difference of light guide plate light in part and exit facet, the brightness of whole raising exit facet; Improved the quality of LED flat lamp.
Little height is between 0.003mm-0.2mm described in the present embodiment; Described each little dot spacing is between 0.02mm-0.2mm.
Light guide plate described in the present embodiment adopts the materials such as polyethylene terephthalate, polycarbonate, polymethylmethacrylate, polyetheretherketone, Polyethylene Naphthalate, poly-succinic ethene, polypropylene oxide to make.
Referring to shown in Figure 4, the manufacture method of light guide plate may further comprise the steps among the present invention:
Two die base materials are provided; The stainless steel material that described die base material employing model is S136 is made; The thickness of described die base material is between 30mm-40mm; Preferred 35mm in the present embodiment; The present invention adopts the design of stainless steel die base material, but the hardness of the little face mould benevolence of Effective Raise can be repeatedly used it, and has effectively guaranteed its engraving precision; Save cost, improved output, further realized die engraving automatic batch production.
Adopt the slow wire feeding cutting technique that two die base materials are processed into respectively little face mould benevolence substrate 5 and wire side die substrate with accurate mould process equipment; Described accurate mould process equipment is a slow wire feeding cutting machine; Described slow wire feeding cutting machine belongs to prior art, gives unnecessary details no longer in detail herein.
Carving machine is preset little some distribution plan; Use the optical simulation software modeling, simulate best little some distribution plan and import in the described finishing impression machine system, control circuit, and set running parameter.
Little face mould benevolence substrate is packed on the substrate erecting bed of carving machine 6; By the grip device on the substrate erecting bed it is gripped; Utilize the space displacement device to adjust substrate erecting bed position, initial little position is transferred to corresponding with height, the position of finishing impression drill bit, with this initial little position of little face mould benevolence substrate is set.
Carving machine is engraved as little face mould benevolence with little face mould benevolence substrate automatically according to little some distribution plan; The inner concave 7 corresponding with the outer convex surface of little point arranged on little face mould benevolence of making, essentially smooth behind this inner concave finishing impression; The degree of depth of this inner concave is 5 μ m in the present embodiment, and the some footpath is 50 μ m.The present invention adopts carving machine little face mould benevolence substrate to be engraved as the step of little face mould benevolence; Improve engraving precision and the carving speed of die, realized die engraving automatic batch production.
According to network point distribution figure wire side die substrate is etched into the wire side die; The inner concave corresponding with convex surface outside the site 8 arranged on this wire side die, and this inner concave degree of depth is 18 μ m, and the some footpath is 80 μ m; The etch process of die substrate is that network point distribution figure is transferred on the die substrate with photosensitive material, carries out etching with solution of ferrous chloride after exposure, and etch process belongs to prior art, gives unnecessary details no longer in detail herein.Certainly, wire side die substrate also can be realized with the step of the little face mould benevolence of manufacturing described in the present invention.
Little face mould benevolence is installed on the die translation stage of buffing machine 9, is fixed with locking device; Utilize that banister brush spare polishes repeatedly to little face mould benevolence on the buffing machine, until the surface flatness of little face mould benevolence meets production requirement.
Referring to shown in Figure 7, wire side die 10, little face mould benevolence 11 and prefabricated light guiding board mould core 12 are assembled into light-conducting board mold 13.
Light-conducting board mold and injection machine are installed; Set injection machine condition of molding parameter; Light-conducting board mold is through the ejection formation light guide plate; Described injection machine is comprised of plasticizing system, injecting systems, Clamping System and kinematic train etc., and this injection machine and Shooting Technique belong to prior art, give unnecessary details no longer in detail herein.
Referring to shown in Figure 5, carving machine described in the present embodiment is provided with support 14, gearshift erecting bed 15, space displacement device 16, substrate erecting bed 17 and finishing impression drill bit 18 from the bottom to top successively.Described carving machine is provided with the system, control circuit of its each parts automatic operation of control; Described little some distribution plan is arranged in this system, control circuit, this little some distribution plan of system, control circuit autoscan, and control carving machine with this and carry out finishing impression work; Described space displacement device is connected with displacement drive motor (not shown), can realize that the substrate erecting bed is along X-axis, Y-axis, Z axis three direction displacement; Grip device 19 for fixing little face mould benevolence substrate is installed on the described substrate erecting bed.
Referring to shown in Figure 6, buffing machine described in the present embodiment comprises base 20 and the frame 21 that is installed on the base, in this frame buff spindle 22 is installed, correspondence is provided with die translation stage 23 below this buff spindle, is provided with for the locking device 24 of fixing little face mould benevolence at this die translation stage; Be set with banister brush spare 25 on the described buff spindle, described buff spindle is connected with the rotary drive motor (not shown), is connected with the displacement drive motor on the described die translation stage; Drive buff spindle by rotary drive motor and rotate to finish polishing to little face mould benevolence; Carry out horizontal shift to realize the comprehensive polishing to little face mould benevolence by displacement drive driven by motor die translation stage; The step that adopts buffing machine that little face mould benevolence is polished among the present invention, utilize banister brush spare that little face mould benevolence is carried out polishing operation, make it Paint Gloss, the little face of light guide plate that the little face mould benevolence of employing after polishing produces is more moist, make the convex surface of little point more mellow and fuller, the scattered beam that enters little point with assurance can be because of the coarse rough rescattering that causes of its convex surface; Thereby Effective Raise the processing quality of light guide plate, improved product quality.
In addition, the embodiment of the invention also provides a kind of backlight module, described backlight module, the light guide plate that comprises light guide plate described above or utilize above-mentioned manufacture method to produce.
Backlight module of the present invention can be applied in the display device, and described display device can be any product or parts with Presentation Function such as liquid crystal panel, Electronic Paper, oled panel, LCD TV, liquid crystal display, digital album (digital photo frame), mobile phone, panel computer.
Claims (10)
1. light guide plate, comprise the light guide plate base material, described light guide plate base material comprises that the plane of incidence in order to receiving beam, a bottom surface, that links to each other with the plane of incidence link to each other with the plane of incidence and the exit facet relative with the bottom surface, a side relative with the plane of incidence and the two sides that all the other are relative, it is characterized in that: described light guide plate exit facet is little face, described little face comprises a plurality of little points, and this little point is provided with outer convex surface; Described bottom surface of light guide plate is wire side, and described wire side comprises a plurality of sites, and this site is provided with outer convex surface.
2. light guide plate according to claim 1 is characterized in that, described little face is the little face of array.
3. the manufacture method of the described light guide plate of claim 1 is characterized in that: said method comprising the steps of:
S1, the default little some distribution plan of carving machine;
S2, with little face mould benevolence substrate carving machine of packing into;
S3, carving machine are engraved as little face mould benevolence according to little some distribution plan with little face mould benevolence substrate;
S4, little face mould benevolence and light guiding board mould core are assembled into light-conducting board mold;
S5, light-conducting board mold are through the ejection formation light guide plate.
4. the manufacture method of described light guide plate according to claim 3 is characterized in that: also comprise the step of utilizing buffing machine that little face mould benevolence is polished between described step S3 and S4.
5. the manufacture method of described light guide plate according to claim 4 is characterized in that: also comprise the step that wire side die, little face mould Renhe light guiding board mould core is assembled into light-conducting board mold in described step S4.
6. the manufacture method of described light guide plate according to claim 5 is characterized in that: further comprising the steps of in described step S5:
S51, light-conducting board mold and injection machine are installed;
S52, setting injection machine condition of molding parameter.
7. the manufacture method of one of them described light guide plate according to claim 3-6, it is characterized in that: described carving machine is provided with support, gearshift erecting bed, space displacement device, substrate erecting bed and finishing impression drill bit from the bottom to top successively.
8. the manufacture method of described light guide plate according to claim 4 is characterized in that: described buffing machine comprises base and is installed in frame on the base, and in this frame buff spindle is installed, correspondence is provided with the die translation stage below this buff spindle.
9. a backlight module is characterized in that, comprises the arbitrary described light guide plate of claim 1-2.
10. a display device is characterized in that, comprises backlight module claimed in claim 9.
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| CN2012104187785A CN102928911A (en) | 2012-10-26 | 2012-10-26 | Light guide plate and manufacturing method of light guide plate as well as backlight module and display device |
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| CN2012104187785A CN102928911A (en) | 2012-10-26 | 2012-10-26 | Light guide plate and manufacturing method of light guide plate as well as backlight module and display device |
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| CN105353440A (en) * | 2015-11-13 | 2016-02-24 | 重庆鑫翎创福光电科技股份有限公司 | Light guide plate made of MS material and provided with light output surface with large round dot structures |
| CN105353441A (en) * | 2015-11-13 | 2016-02-24 | 重庆鑫翎创福光电科技股份有限公司 | Light guide plate made of PMMA material and provided with light output surface with large round dot structures |
| CN105353445A (en) * | 2015-11-13 | 2016-02-24 | 重庆鑫翎创福光电科技股份有限公司 | PMMA light guide plate with single-side microstructure and light output micro prism structure |
| CN105353442A (en) * | 2015-11-13 | 2016-02-24 | 重庆鑫翎创福光电科技股份有限公司 | Light guide plate of PS material and with projection structures |
| CN105372748A (en) * | 2015-11-13 | 2016-03-02 | 重庆鑫翎创福光电科技股份有限公司 | MS light guide plate with light-out microprism structure |
| CN105372746A (en) * | 2015-11-13 | 2016-03-02 | 重庆鑫翎创福光电科技股份有限公司 | PMMA light guide plate with prism structure |
| CN105372745A (en) * | 2015-11-13 | 2016-03-02 | 重庆鑫翎创福光电科技股份有限公司 | PS light guide plate with single-sided microstructure and light-out microprism structure |
| CN105372747A (en) * | 2015-11-13 | 2016-03-02 | 重庆鑫翎创福光电科技股份有限公司 | PS light guide plate with single-sided microstructure and light-out microprism structure |
| CN105372743A (en) * | 2015-11-13 | 2016-03-02 | 重庆鑫翎创福光电科技股份有限公司 | PS light guide plate with light-out microprism structure |
| CN105372740A (en) * | 2015-11-13 | 2016-03-02 | 重庆鑫翎创福光电科技股份有限公司 | PMMA light guide plate with light-out microprism structure |
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| CN109465991A (en) * | 2018-11-06 | 2019-03-15 | 靖江市永盛光电科技有限公司 | A kind of site processing technology of vehicle-mounted diffuser plate |
| CN110244399A (en) * | 2019-05-30 | 2019-09-17 | 开平市盈光机电科技有限公司 | A kind of light guide plate moves the manufacture craft of optical microstructures on mould mold core lozenges |
| CN112965160A (en) * | 2021-02-04 | 2021-06-15 | 东莞市元立电子科技有限公司 | Processing technology of light guide plate light-emitting surface mold core and textured surface light guide plate |
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| CN105372745A (en) * | 2015-11-13 | 2016-03-02 | 重庆鑫翎创福光电科技股份有限公司 | PS light guide plate with single-sided microstructure and light-out microprism structure |
| CN105353445A (en) * | 2015-11-13 | 2016-02-24 | 重庆鑫翎创福光电科技股份有限公司 | PMMA light guide plate with single-side microstructure and light output micro prism structure |
| CN105353442A (en) * | 2015-11-13 | 2016-02-24 | 重庆鑫翎创福光电科技股份有限公司 | Light guide plate of PS material and with projection structures |
| CN105353440A (en) * | 2015-11-13 | 2016-02-24 | 重庆鑫翎创福光电科技股份有限公司 | Light guide plate made of MS material and provided with light output surface with large round dot structures |
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| CN105353441A (en) * | 2015-11-13 | 2016-02-24 | 重庆鑫翎创福光电科技股份有限公司 | Light guide plate made of PMMA material and provided with light output surface with large round dot structures |
| CN105372747A (en) * | 2015-11-13 | 2016-03-02 | 重庆鑫翎创福光电科技股份有限公司 | PS light guide plate with single-sided microstructure and light-out microprism structure |
| CN105372748A (en) * | 2015-11-13 | 2016-03-02 | 重庆鑫翎创福光电科技股份有限公司 | MS light guide plate with light-out microprism structure |
| CN105372740A (en) * | 2015-11-13 | 2016-03-02 | 重庆鑫翎创福光电科技股份有限公司 | PMMA light guide plate with light-out microprism structure |
| CN108838864A (en) * | 2018-09-11 | 2018-11-20 | 苏州天禄光科技股份有限公司 | Guide-lighting plate end face polishing and transfer integrated apparatus |
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| CN109465991A (en) * | 2018-11-06 | 2019-03-15 | 靖江市永盛光电科技有限公司 | A kind of site processing technology of vehicle-mounted diffuser plate |
| CN110244399A (en) * | 2019-05-30 | 2019-09-17 | 开平市盈光机电科技有限公司 | A kind of light guide plate moves the manufacture craft of optical microstructures on mould mold core lozenges |
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