CN1431526A

CN1431526A - Method for producing Fresnel lens

Info

Publication number: CN1431526A
Application number: CN02101577A
Authority: CN
Inventors: 王志鸿; 林钧瑜; 龚大焜
Original assignee: Prodisc Technology Inc
Current assignee: Prodisc Technology Inc
Priority date: 2002-01-10
Filing date: 2002-01-10
Publication date: 2003-07-23

Abstract

The producing method includes following steps. The light solidifying glue is coated on the fresnel die in local mode for putting the glue. Under the rolling depression condition, acryl base plate covers the fresnel die with the glue coated. Light irradites the base plate and die to solidifying the glue. Separating the light solidifying glue with the die so as to form the fresnel lens. The local mode for putting the glue is utilized so as to rmove air bubbles effectively. It is helpful for raising the fineness ratio of the produced fresnel lenses.

Description

The manufacture method of Fresnel Lenses

Technical field

The present invention relates to the manufacture method of a kind of Fresnel Lenses (Fresnel lens), particularly utilize local glue mode down to be coated with the Fresnel Lenses manufacture method of light binding.

Background technology

Along with popularizing of HDTV and DVD Player, the image quality of large-sized monitor more and more is subjected to the attention in market.In large-sized monitor, because under the consideration of use occasion and price, the back of the body (interior) projection TV becomes one of developing direction main in the opto-electronics.

Generally speaking, rear projection screen is that the image in the projector is launched, pass display screen and enter spectators' eyes, be with large scale, high image quality on market and frivolously be its characteristics, thus need consider in design viewing angle brightness, increase picture contrast and solve problems such as image modification.Wherein, the main function of Fresnel Lenses is the ray-collecting at Vernonia parishii Hook angle that projector is launched, makes the light of dispersing originally can concentrate in spectators' the visual angle, to reach the purpose that increases brightness of image.

The structure of Fresnel Lenses mainly is made up of the resin that an acrylic plate and has a Fresnel pattern, its manufacture method has modes such as ejection formation, mold and hot pressing, but the size of product size all is subject to the scale of production equipment, the production procedure of general continous way all is limited in the product less than 20 inch, and large-sized product only can be criticized formula mold mode (casting) production.Existing Fresnel Lenses manufacture method is polyurethane, polymethylmethacrylate, poly-third vinyl with response type or its multipolymer at room temperature hardens, in the mold mode behind the pattern that forms Fresnel Lenses on the acrylic plate, form Fresnel Lenses again, but the waits for too long of the method and first demoulding trace is arranged and be difficult for shortcomings such as the demoulding.Another Fresnel Lenses manufacture method is to come the resin of alternative reaction type with UV cured glue, though can shorten journey production phase, a large amount of production, but in manufacture process, produce bubble easily, very big influence is arranged for the yield of produced Fresnel Lenses.

Summary of the invention

At the problems referred to above, the purpose of this invention is to provide and a kind ofly utilize local glue mode down to be coated with light binding manufacture method with the Fresnel Lenses of effective removal bubble on Phenanthrine mould.

For reaching above-mentioned purpose, the invention provides a kind of manufacture method of Fresnel Lenses, comprise the following step: a light binding is coated on the Phenanthrine mould in glue mode under the part; In the roll extrusion mode one acryl substrate is covered on the Phenanthrine mould that is coated with light binding; Solidify light binding with irradiate light acryl substrate and Phenanthrine mould; And light binding is separated with Phenanthrine mould, form Fresnel Lenses according to this.

Compared with prior art, the manufacture method of Fresnel Lenses of the present invention is to utilize local glue mode down to be coated with light binding on Phenanthrine mould, the bubble that it can effectively remove in the production run to be produced has very big benefiting for the yield of the Fresnel Lenses that promotes manufacturing.

Description of drawings

The present invention is described in detail below in conjunction with drawings and Examples:

Fig. 1 is a calcspar, and the manufacture method of Fresnel Lenses of the present invention is described;

Fig. 2 A is a synoptic diagram to 2C, illustrates that light binding coats glue mode under the part on the Phenanthrine mould;

Fig. 3 is a synoptic diagram, illustrates that the acryl substrate is covered on the Phenanthrine mould;

Fig. 4 is the synoptic diagram that amplify the part of Fig. 3, illustrates that irradiate light is to solidify light binding;

Fig. 5 is the synoptic diagram that amplify the part of Fig. 3, illustrates to separate light binding and Phenanthrine mould, to form Fresnel Lenses.

Symbol description among the figure:

1 Fresnel Lenses

11 light bindings

12 Phenanthrine moulds

13 acryl substrates

14 times glue shower nozzles

15 seaming rolls

Embodiment

Hereinafter with reference to relevant drawings, the manufacture method according to the Fresnel Lenses of the embodiment of the invention is described, wherein identical assembly will be illustrated with identical reference marks.

As shown in Figure 1, the manufacture method of the Fresnel Lenses 1 of the embodiment of the invention comprises the following step: a light binding 11 is coated on the Phenanthrine mould 12 (S01) in glue mode under the part; One acryl substrate 13 is covered on the Phenanthrine mould 12 that is coated with light binding 11 (S02) in the roll extrusion mode; Solidify light binding 11 (S03) with irradiate light acryl substrate 13 and Phenanthrine mould 12; And light binding 11 is separated with Phenanthrine mould 12, form Fresnel Lenses 1 (S04) according to this.

In step S01, as shown in Figure 2, be to utilize an automatic colloid system (not being shown among the figure) down that the mode of light binding 11 with glue under the part is coated on the Phenanthrine mould 12.And light binding 11 is coated on before the Phenanthrine mould 12, must remove on the acryl substrate 13 dust with Phenanthrine mould 12 lip-deep static and Electrostatic Absorption with X eliminator.

In step S01, local glue mode down can be divided into glue under glue under the wire (as shown in Figure 2) and the point-like (shown in Fig. 2 A), the figure of following glue can be ㄇ font (as shown in Figure 2), M font (as Fig. 2 B) and arc (shown in Fig. 2 C) or the like, and it can reduce the use amount of light binding 11 and prevent in the manufacture process bubble that is produced.In addition, employed in the present embodiment light binding 11 is a ultraviolet light (UV) glue, it can be methyl methacrylate series and carbamate series, as the ultraviolet light photopolymerization resin of broadening model EXA288 acryl series forever, and employed at the same time smooth initiator is Ciba E-184 0.5～5%.The bubble that is produced in the manufacture process also can be reduced the generation of bubble by the distance control between following glue shower nozzle 14 and the Phenanthrine mould 12, and particularly, the distance between following glue shower nozzle 14 and the Phenanthrine mould 12 is in 1～3 centimeter scope.Moreover, the viscosity of light binding 11 (Viscosity) must be controlled at about 600 centipoises～1500 centipoises (Centi-Poise, Cp) between.In addition, also must add 0.1～1% interfacial agent,, prevent the generation of bubble as the special scientific and technological AEROSOL surfactants of Taiwan cyanogen.

Again, as shown in Figure 3, the optics acryl substrate that employed acryl substrate 13 is a single face cloudy surface non-glare treated in step S02.In step S02, the acryl substrate 13 that slowly covers 2～3mm with axis servomotor is on the Phenanthrine mould 12 that scribbles light binding 11, and simultaneously along with seaming roll (Roller) 15 roll extrusion forward, light binding 11 is effectively launched in the horizontal direction, also can effectively remove down the bubble that glue shower nozzle 14 is produced.

Fig. 4 and Fig. 5 are the partial enlarged drawing of Fig. 3.In Fig. 4 and Fig. 5, can know the lines of finding out between light binding 11 and the Phenanthrine mould 12.

Please refer to Fig. 4, covered after the acryl substrate 13, acryl substrate 13, light binding 11 and Phenanthrine mould 12 are together sent in the illumination apparatus irradiation light to solidify light binding 11 with conveying belt, in this, light is a ultraviolet light.

Please refer to Fig. 5 again, will with automatic dismoulding system Phenanthrine mould 12 be separated with light binding 11, to form Fresnel Lenses 1 according to acryl substrate 13, light binding 11 and the Phenanthrine mould 12 of intact ultraviolet light.

The manufacture method of Fresnel Lenses of the present invention is to utilize local gluing method down that light binding is coated on the Phenanthrine mould, because the local relation of gluing method down, the bubble that can effectively reduce in manufacture process to be produced increases the yield of the Fresnel Lenses of made.Again, resin used in the present invention is a light binding, just can cured resin via irradiation light, also can shorten production phase journey and a large amount of the manufacturing produce.

The above only is an illustrative, but not is restricted.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the protection domain of this patent its equivalent modifications of carrying out or change.

Claims

1. the manufacture method of a Fresnel Lenses is characterized in that: comprise the following step:

One light binding is coated on the Phenanthrine mould in glue mode under the part;

One acryl substrate is covered on this Phenanthrine mould that is coated with light binding in the roll extrusion mode;

With this acryl substrate of irradiate light and this Phenanthrine mould to solidify this light binding; And

This light binding is separated with this Phenanthrine mould, form a Fresnel Lenses according to this.

2. according to the manufacture method of the described Fresnel Lenses of claim 1, it is characterized in that: the glue mode is a glue mode under the point-like under this part.

3. according to the manufacture method of the described Fresnel Lenses of claim 1, it is characterized in that: the glue mode is a glue mode under the wire under this part.

4. according to the manufacture method of claim 2 or 3 described Fresnel Lenses, it is characterized in that: when glue was played in the part, this light binding was ㄇ font figure.

5. according to the manufacture method of claim 2 or 3 described Fresnel Lenses, it is characterized in that: when glue was played in the part, this light binding was M font figure.

6. according to the manufacture method of claim 2 or 3 described Fresnel Lenses, it is characterized in that: when glue is played in the part, the curved figure of this light binding.

7. the manufacture method of Fresnel Lenses according to claim 1, it is characterized in that: this light binding is a ultraviolet optical cement.