CN103675990A - Curved light guide plate and manufacturing method thereof - Google Patents
Curved light guide plate and manufacturing method thereof Download PDFInfo
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- CN103675990A CN103675990A CN201310733584.9A CN201310733584A CN103675990A CN 103675990 A CN103675990 A CN 103675990A CN 201310733584 A CN201310733584 A CN 201310733584A CN 103675990 A CN103675990 A CN 103675990A
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Abstract
The invention discloses a curved light guide plate and a manufacturing method thereof. The curved light guide plate comprises an incidence surface, a first curved surface and a second curved surface. The first curved surface is parallel to the second curved surface and the first curved surface and the second curved surface are mounted on each side of the in-light surface. The first curved surface is provided with lattice points. Lights are reflected by the lattice points upon penetrating the incidence surface and shoots out from the second curved surface. The curved light guide plate is made of ultra clear glass and is made by curving ultra clear glass to be formed and constructing the lattice points on the first curved surface. The processed curved light guide plate is stable in performance and insusceptible to environmental changes of temperature and humidity under the conditions that the good area light and the light use efficiency are guaranteed. Accordingly, good dimensional stability to form stable and even backlights is guaranteed.
Description
Technical field
The present invention relates to light guide plate field, relate in particular to a kind of crooked light guide plate and preparation method thereof.
Background technology
For crooked display device, need to will for it, provide the backlight module of back light also to make crooked shape, the crooked radian of its light-emitting area is determined according to the curved shape of display panel; Therefore, the optical element in backlight group of membrane module also needs to be processed to crooked shape.In backlight module, light guide plate is main optical element, and in the prior art, light guide plate is conventionally by PMMA(polymethylmethacrylate: PolymethylMethacrylate) material is made, the weak point of the crooked light guide plate that this kind of material made is, the impact that its geomery can be changed by ambient temperature and humidity; Such as, when humidity is too high, crooked light guide plate absorbs after the moisture of enough air, and volume can expand; Therefore the formed radian of crooked light guide plate just cannot match with the radian of display panel, thereby the picture brightness that crooked display device is shown is uneven, or produces the bad consequence such as crooked light guide plate and display panel extruding.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of crooked light guide plate and preparation method thereof, use ultra-clear glasses as the starting material of crooked light guide plate, guaranteeing that described crooked light guide plate is under the prerequisite of the utilization factor of the good area source of acquisition and light, make it not be subject to the impact that ambient temperature and humidity changes, thereby guarantee that described crooked light guide plate has good dimensional stability.
The invention provides a kind of crooked light guide plate, comprise incidence surface, the first surface being parallel to each other and the second curved surface, the relative both sides of described incidence surface are connected to described first surface and described the second curved surface, and described first surface is provided with site; Light is injected and by the reflection of described site, from described the second curved surface, is penetrated from described incidence surface; The material of described crooked light guide plate is ultra-clear glasses.
The present invention also provides a kind of method for making of above-mentioned crooked light guide plate, comprising: by ultra-clear glasses brake forming and on described first surface, process behind site, make described crooked light guide plate.
Preferably, described ultra-clear glasses brake forming is comprised:
Ultra-clear glasses is cut into default shape and size;
The described ultra-clear glasses of polishing;
Described ultra-clear glasses is placed in the first mould, and described the first mould and described ultra-clear glasses is inserted in bending furnace and heated, described ultra-clear glasses softening and with the cambered surface laminating of described the first mould after, by described ultra-clear glasses annealing.
Preferably, described ultra-clear glasses is softened and is comprised with the cambered surface laminating of described the first mould:
The bottom surface of the described ultra-clear glasses after softening forms described first surface, and the described cambered surface laminating to lower recess of described first surface and described the first mould;
Or the bottom surface of the described ultra-clear glasses after softening forms described the second curved surface, and the described cambered surface protruding upward of described the second curved surface and described the first mould is fitted.
Preferably, the described ultra-clear glasses of described polishing comprises:
By four jiaos of described ultra-clear glasses, be polished into oblique angle; And by described ultra-clear glasses corresponding to the surface grinding polishing of the incidence surface of described crooked light guide plate.
Preferably, described ultra-clear glasses brake forming is comprised:
According to the shape of described crooked light guide plate and size, make the second mould, between the patrix of described the second mould and counterdie, process one with described crooked light guide plate shape and closed cavity of the same size;
Ultra-clear glasses is heated to liquid state and injects described closed cavity;
At described patrix, exert pressure, make liquid ultra-clear glasses fill up described closed cavity;
The ultra-clear glasses of described liquid state is carried out to cooling and curing processing.
Preferably, describedly on described first surface, process site and comprise: described closed cavity corresponding to the inwall of described first surface on processing and the size of described site and the concave point of shape adaptation;
Describedly make liquid ultra-clear glasses fill up described closed cavity also to comprise: make liquid ultra-clear glasses fill up described concave point.
Preferably, the mode of described processing concave point is laser ablation or chemical etching.
Preferably, describedly on described first surface, process site and comprise:
Printing net-point being cured after processing on PET film is coated with mucigel in the one side of printing net-point, and attaches diaphragm on described mucigel on described PET film;
The one side that described PET film is posted to described diaphragm is positioned on the first surface of described crooked light guide plate, and described PET film is preheated as the shape with described first surface adaptation;
Tear described diaphragm off, described mucigel and described first surface are binded.
Preferably, describedly on described first surface, process site and comprise: in described first surface serigraphy site and carry out the curing processing of high-temperature baking or illumination.
The invention provides a kind of crooked light guide plate, comprise incidence surface, the first surface being parallel to each other and the second curved surface, the relative both sides of described incidence surface are connected to described first surface and described the second curved surface, and described first surface is provided with site; Light is injected and by the reflection of described site, from described the second curved surface, is penetrated from described incidence surface; The material of described crooked light guide plate is ultra-clear glasses; The present invention processes behind site by ultra-clear glasses brake forming and on described first surface, make described crooked light guide plate, described crooked light guide plate stable performance after processing, guaranteeing that described crooked light guide plate is under the prerequisite of the utilization factor of the good area source of acquisition and light, make it not be subject to the impact that ambient temperature and humidity changes, thereby guarantee that described crooked light guide plate has good dimensional stability, form the backlight of stable and uniform.
Accompanying drawing explanation
Fig. 1 is the travel path schematic diagram of the crooked light conducting plate structure of the present invention and light;
Fig. 2 is the structural representation of the first embodiment of the crooked light guide plate of the present invention and the first mould;
Fig. 3 is the structural representation of the second embodiment of the crooked light guide plate of the present invention and the first mould;
Fig. 4 is the structural representation of the first embodiment of the present invention's the second mould;
Fig. 5 is the structural representation of the second embodiment of the crooked light guide plate of the present invention and the second mould;
Fig. 6 is the perspective view of the patrix of the second mould in Fig. 5;
Fig. 7 is that the present invention pastes site to the structural representation of the PET film of described crooked light guide plate;
Fig. 8 is the structural representation that the present invention pastes the described crooked light guide plate behind site.
The realization of the object of the invention, functional characteristics and advantage, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Below in conjunction with Figure of description and specific embodiment, further illustrate technical scheme of the present invention.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
With reference to Fig. 1, Fig. 1 is the travel path schematic diagram of the crooked light conducting plate structure of the present invention and light; First surface 102 and the second curved surface 103 that the crooked light guide plate 10 of the present embodiment comprises incidence surface 101, is parallel to each other, the relative both sides of described incidence surface 101 are connected to described first surface 102 and described the second curved surface 103, and described first surface 102 is provided with site 104; Light is injected and by 104 reflections of described site, from described the second curved surface 103, is penetrated from described incidence surface 101; The material of described crooked light guide plate 10 is ultra-clear glasses, because the visible light transmissivity of ultra-clear glasses is more than 91-92%, the refractive index of its relative air is 1.51-1.52, and ultra-clear glasses is not subject to the impact that ambient temperature and humidity changes, therefore use ultra-clear glasses as the starting material of described crooked light guide plate 10, when can obtaining the utilization factor of good area source and light, also can guarantee that described crooked light guide plate 10 has good dimensional stability.
As shown in Figure 1, light source 1 sends light shown in dotted lines in Figure 1, described light is injected from being arranged at the incidence surface 101 of described crooked light guide plate 10 one end, and described light occurs after total reflection in described crooked light guide plate 10, from the other end of described crooked light guide plate 10, penetrates, simultaneously, the site 104 of a plurality of marshallings is set on the first surface 102 of described crooked light guide plate 10, in the present embodiment, rectangular the arranging in described site 104, but in the present invention, be not limited to this kind of arrangement mode, also can arrange as circle, other polygons etc., as long as shown in fig. 1, the total reflection environment of described light can be destroyed in described site 104, make after the reflection of described light by described site 104, from described the second curved surface 103, evenly penetrate and form area source, and described light is after forming the area source penetrating in described the second curved surface 103, by the processing of blooming piece 2, finally be mapped on display panels 3 form backlight uniformly.The present invention is guaranteeing that described crooked light guide plate 10 is under the prerequisite of the utilization factor of the good area source of acquisition and light, make it not be subject to the impact that ambient temperature and humidity changes, thereby guarantee that described crooked light guide plate 10 has good dimensional stability, form the backlight of stable and uniform.
The present invention also provides a kind of method for making of above-mentioned crooked light guide plate, comprise: by ultra-clear glasses brake forming and on described first surface 102, process behind site 104, make described crooked light guide plate 10, according to the needs of processing, the process of described processing site 104 can be carried out before described ultra-clear glasses is bent to moulding, also can treat that described ultra-clear glasses bends moulding and processes afterwards again, and also can carry out with the process that bends moulding simultaneously, the present invention processes behind site 104 by ultra-clear glasses brake forming and on described first surface 102, make described crooked light guide plate 10, described crooked light guide plate 10 stable performances after processing.
With reference to Fig. 2 and Fig. 3, Fig. 2 is the structural representation of the first embodiment of the crooked light guide plate of the present invention and the first mould; Fig. 3 is the structural representation of the second embodiment of the crooked light guide plate of the present invention and the first mould; Described ultra-clear glasses brake forming is comprised:
Ultra-clear glasses is cut into default shape and size; Described shape and size can be set according to the size of described display panels and shape.
The described ultra-clear glasses of polishing; It comprises: by four jiaos of described ultra-clear glasses, be polished into oblique angle, in the present embodiment, polish in edge to the ultra-clear glasses after cutting, and by its four jiaos of oblique angles that are polished into 0.2mm, the size at described oblique angle is including but not limited to being 0.2mm, as long as can play coarse particle and the impurity of removing four jiaos, obtain the effect at level and smooth edge; If described ultra-clear glasses is other shapes, also can polish according to the needs of other shapes, such as, can be fillet by its four jiaos polishings; And by described ultra-clear glasses corresponding to the surface grinding polishing of the incidence surface 101 of described crooked light guide plate 10 so that its any surface finish is smooth, be conducive to like this control the angle that described light is injected described ultra-clear glasses.
Described ultra-clear glasses is placed into the first mould 21 described in the first mould 20(in the first embodiment or the second embodiment) in, and by described the first mould 20(or the first mould 21) and described ultra-clear glasses insert in bending furnace (not shown) and heat, the furnace chamber of described bending furnace heats up, described ultra-clear glasses is heated, make described ultra-clear glasses reach softening temperature, described ultra-clear glasses is softened and is fitted with the cambered surface 201 of described the first mould 20 after (or fitting with the cambered surface 211 of described the first mould 21), by described ultra-clear glasses annealing, after glass cools, form the required shape of described crooked light guide plate 10.With reference to Fig. 2 and Fig. 3, above-mentioned ultra-clear glasses is softening and fit with the cambered surface 201 of described the first mould 20 (or fitting with the cambered surface 211 of described the first mould 21) comprising: as shown in Figure 2, the bottom surface of the described ultra-clear glasses after softening forms described first surface 102, and described cambered surface 201 laminatings to lower recess of the first mould 20 described in described first surface 102 and the first embodiment.(or as shown in Figure 3, the bottom surface of the described ultra-clear glasses after softening forms described the second curved surface 103, and described cambered surface protruding upward 211 laminatings of the first mould 21 described in described the second curved surface 103 and the second embodiment.）
With reference to Fig. 4, Fig. 4 is the structural representation of the first embodiment of the present invention's the second mould; Described ultra-clear glasses brake forming is comprised:
According to the shape of described crooked light guide plate 10 and size, make the second mould 30, described the second mould 30 comprises the patrix 301 that is positioned at upside, the counterdie 302 that is positioned at downside and is connected with described patrix 301 adaptations, when described the second mould 30 work, described patrix 301 and described counterdie 302 can be closed, between the patrix 301 of described the second mould 30 and counterdie 302, process one with described crooked light guide plate 10 shapes and closed cavity of the same size, the shape of described closed cavity needs make according to shape and the size of described crooked light guide plate 10;
Ultra-clear glasses is heated to liquid state and injects described closed cavity;
At described patrix, exert pressure, and there is certain pressure in the closed cavity that keeps forming between described patrix 301 and described counterdie 302, make liquid ultra-clear glasses fill up described closed cavity;
The ultra-clear glasses of described liquid state is carried out to cooling and curing processing, form the required shape of described crooked light guide plate 10.
With reference to Fig. 5 and Fig. 6, Fig. 5 is the structural representation of the second embodiment of the crooked light guide plate of the present invention and the second mould, Fig. 6 is the perspective view of the patrix of the second mould in Fig. 5, described ultra-clear glasses brake forming is comprised: according to the shape of described crooked light guide plate 10 and size, make the second mould 31, described the second mould 31 comprises the patrix 311 that is positioned at upside, the counterdie 312 that is positioned at downside and is connected with described patrix 311 adaptations, when described the second mould 31 work, described patrix 311 and described counterdie 312 can be closed, between the patrix 311 of described the second mould 31 and counterdie 312, process one with described crooked light guide plate 10 shapes and closed cavity of the same size, the shape of described closed cavity needs to make according to shape and the size of described crooked light guide plate 10, ultra-clear glasses is heated to liquid state and injects described closed cavity, at described patrix, exert pressure, and there is certain pressure in the closed cavity that keeps forming between described patrix 311 and described counterdie 312, make liquid ultra-clear glasses fill up described closed cavity, the ultra-clear glasses of described liquid state is carried out to cooling and curing processing, form the required shape of described crooked light guide plate 10.
As shown in Figures 5 and 6, the described site 104 that processes on described first surface comprises: described closed cavity corresponding to the inwall of described first surface 102 on processing and the size of described site 104 and the concave point 313 of shape adaptation, and the mode of described processing concave point 313 is laser ablation or chemical etching; In the present embodiment, the closed cavity of described the second mould 31 raises up, and described concave point 313 is arranged on the inwall of described patrix 311, and still, when closed cavity of the present invention is during to lower recess, described concave point 313 answers relative set on the inwall of described counterdie 312.Describedly make liquid ultra-clear glasses fill up described closed cavity also to comprise: make liquid ultra-clear glasses fill up described concave point 313.Also, the process of above-mentioned processing site 104 with bend the process of crooked light guide plate 10 described in moulding and carry out simultaneously, therefore only need to carry out the crooked light guide plate that time processing just can obtain possessing site 104.
With reference to Fig. 7 and Fig. 8, Fig. 7 is that the present invention pastes site to the structural representation of the PET film of described crooked light guide plate; Fig. 8 is the structural representation that the present invention pastes the described crooked light guide plate behind site; Use in the above-described embodiments after hot bending method or die mould method bend described ultra-clear glasses to be shaped to the required shape of described crooked light guide plate 10, describedly on described first surface 102, process site 104 and comprise:
At PET (polyethylene terephthalate: Polyethylene terephthalate) printing net-point 104 being cured after processing on film 40, on described PET film 40, in the one side of printing net-point 104, be coated with mucigel 50, and attach diaphragm 60 on described mucigel 50; The material of described diaphragm is PET, and the mode of described printing net-point 104 is serigraphy, and the mode of described curing processing is high-temperature baking or illumination.
The one side that described PET film 40 is posted to described diaphragm 60 is positioned on the first surface 102 of described crooked light guide plate 10, use calorifier to the pressurization of heating of described PET film 40, and described PET film 40 is preheated as the shape with described first surface 102 adaptations;
Tear described diaphragm 60 off, described mucigel 50 and described first surface 102 are binded, thereby make to there is described site 104 on the first surface 102 of described crooked light guide plate 10.The process of above-mentioned processing site 104 is being carried out after crooked light guide plate 10 described in bending moulding, and its process is simple, does not need specialized designs mould.
Further, describedly on described first surface 102, process site 104 and comprise: in described first surface 102 serigraphy sites 104 and carry out the curing processing of high-temperature baking or illumination.The process of above-mentioned processing site 104 can bend described in moulding before crooked light guide plate 10 or carry out afterwards, and the limitation of processing is little, and its process is simple, does not need specialized designs mould.
The embodiment of the present invention is processed behind site 104 by ultra-clear glasses brake forming and on described first surface 102, make described crooked light guide plate 10, described crooked light guide plate 10 stable performances after processing, guaranteeing that described crooked light guide plate 10 is under the prerequisite of the utilization factor of the good area source of acquisition and light, make it not be subject to the impact that ambient temperature and humidity changes, thereby guarantee that described crooked light guide plate has good dimensional stability, makes the stable and uniform backlight of display panels.
The foregoing is only the preferred embodiments of the present invention; not thereby limit its scope of the claims; every equivalent structure or conversion of equivalent flow process that utilizes instructions of the present invention and accompanying drawing content to do; directly or indirectly be used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a crooked light guide plate, is characterized in that, comprises incidence surface, the first surface being parallel to each other and the second curved surface, and the relative both sides of described incidence surface are connected to described first surface and described the second curved surface, and described first surface is provided with site; Light is injected and by the reflection of described site, from described the second curved surface, is penetrated from described incidence surface; The material of described crooked light guide plate is ultra-clear glasses.
2. a method for making for crooked light guide plate as claimed in claim 1, is characterized in that, comprising: by ultra-clear glasses brake forming and on described first surface, process behind site, make described crooked light guide plate.
3. the method for making of crooked light guide plate according to claim 2, is characterized in that, described ultra-clear glasses brake forming is comprised:
Ultra-clear glasses is cut into default shape and size;
The described ultra-clear glasses of polishing;
Described ultra-clear glasses is placed in the first mould, and described the first mould and described ultra-clear glasses is inserted in bending furnace and heated, described ultra-clear glasses softening and with the cambered surface laminating of described the first mould after, by described ultra-clear glasses annealing.
4. the method for making of crooked light guide plate according to claim 3, is characterized in that, described ultra-clear glasses is softened and comprised with the cambered surface laminating of described the first mould:
The bottom surface of the described ultra-clear glasses after softening forms described first surface, and the described cambered surface laminating to lower recess of described first surface and described the first mould;
Or the bottom surface of the described ultra-clear glasses after softening forms described the second curved surface, and the described cambered surface protruding upward of described the second curved surface and described the first mould is fitted.
5. the method for making of crooked light guide plate according to claim 3, is characterized in that, the described ultra-clear glasses of described polishing comprises:
By four jiaos of described ultra-clear glasses, be polished into oblique angle; And by described ultra-clear glasses corresponding to the surface grinding polishing of the incidence surface of described crooked light guide plate.
6. the method for making of crooked light guide plate according to claim 2, is characterized in that, described ultra-clear glasses brake forming is comprised:
According to the shape of described crooked light guide plate and size, make the second mould, between the patrix of described the second mould and counterdie, process one with described crooked light guide plate shape and closed cavity of the same size;
Ultra-clear glasses is heated to liquid state and injects described closed cavity;
At described patrix, exert pressure, make liquid ultra-clear glasses fill up described closed cavity;
The ultra-clear glasses of described liquid state is carried out to cooling and curing processing.
7. the method for making of crooked light guide plate according to claim 6, it is characterized in that, describedly on described first surface, process site and comprise: described closed cavity corresponding to the inwall of described first surface on processing and the size of described site and the concave point of shape adaptation;
Describedly make liquid ultra-clear glasses fill up described closed cavity also to comprise: make liquid ultra-clear glasses fill up described concave point.
8. the method for making of crooked light guide plate according to claim 7, is characterized in that, the mode of described processing concave point is laser ablation or chemical etching.
9. according to the method for making of the crooked light guide plate described in claim 3 or 6, it is characterized in that, describedly on described first surface, process site and comprise:
Printing net-point being cured after processing on PET film is coated with mucigel in the one side of printing net-point, and attaches diaphragm on described mucigel on described PET film;
The one side that described PET film is posted to described diaphragm is positioned on the first surface of described crooked light guide plate, and described PET film is preheated as the shape with described first surface adaptation;
Tear described diaphragm off, described mucigel and described first surface are binded.
10. according to the method for making of the crooked light guide plate described in claim 3 or 6, it is characterized in that, describedly on described first surface, process site and comprise: in described first surface serigraphy site and carry out the curing processing of high-temperature baking or illumination.
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