CN100365440C - Prism sheet and method for manufacturing the same - Google Patents

Abstract

The invention relates to a method for manufacturing a prism plate, which comprises the following steps: forming a prism layer; forming a shielding layer on a light-emitting part of the prism layer; forming a reflecting layer on a reflecting part of the prism layer; removing the shielding layer; arranging a photosensitive film on the prism layer so that the photosensitive film is attached to the light emergent part; carrying out exposure; and spraying carbon powder on the unexposed part of the photosensitive film. The invention increases the utilization rate of light by utilizing the characteristic of reflecting light of the reflecting layer, can meet the requirements of space miniaturization and high precision, and can reduce the production cost and improve the process yield because the black band layer can be manufactured by a simple process.

Description

Prism plate and manufacture method thereof

Technical field

The present invention relates to a kind of prism plate and manufacture method thereof, be meant a kind of prism plate and manufacture method thereof especially with black-tape layer.

Background technology

In recent years, the liquid crystal projector of single light source projection or digital light treating apparatus (DLP) are good in all more traditional CRT projector of lightness and density.

Figure 1 shows that liquid crystal projector or the employed screen of digital light treating apparatus,screen 1 comprises a Fresnel Lenses (Fresnel Lens) 11 and convex lens layer 12.As shown in Figure 1, the light that light source is launched becomes directional light by FresnelLenses 11, this directional light passes theplural convex lens 121 ofconvex lens layer 12 light inlet side and optically focused is penetrated with an angle θ byconvex lens layer 12 bright dipping side again, and this scope is the scope that the beholder can see image.Please refer to Fig. 1 again, the bright dipping side ofconvex lens layer 12 is provided withlight shield layer 13, and it is in order to preventing reflection of light, and then promotes the contrast of image.

At present,convex lens layer 12 is towards the trend development of spacing (pitch) microminiaturization, because the microminiaturization ofconvex lens 121, focal length also shortens thereupon, and the thickness ofconvex lens layer 12 also must attenuate.Yet present employed extrusion molding processing procedure can't be made theconvex lens layer 12 of high precision spacing microminiaturization.In addition because convexlens 121 must accurately aim at the relative position between thelight shield layer 13, so when the spacing microminiaturization, the production yield will certainly with reduction, and manufacturing cost can improve thereupon.

Summary of the invention

The objective of the invention is to overcome the deficiencies in the prior art and defective, provide that a kind of spacing is fine, light utilization efficiency is high, precision is high, contrast is high, processing procedure is simple, low cost of manufacture and good prism plate and the manufacture method thereof of yield.

For reaching above-mentioned purpose, the invention provides a kind of prism plate, comprise a layers of prisms, a reflectance coating and a black-tape layer, wherein, layers of prisms has a plurality of unit prisms, and each unit prisms has a reflecting part, a light in part and a light out part; Reflectance coating is arranged at the reflecting part of each unit prisms, so that the part light of injecting from light in part reflexes to light out part; The black-tape layer has at least one transmittance section and at least one light shielding part, and the black-tape layer is arranged on the layers of prisms, and transmittance section and light out part fit.

For reaching above-mentioned purpose, the present invention also provides a kind of prism plate manufacture method, comprises the following step: form a layers of prisms; Light out part in this layers of prisms forms a shielding layer; Reflecting part in this layers of prisms forms a reflection horizon; Remove this shielding layer; One light-sensitive surface is set in this layers of prisms, so that this light-sensitive surface and this light out part fit; Expose; And spill carbon dust in the unexposed part of this light-sensitive surface.

From the above, in prism plate of the present invention and manufacture method thereof, be provided with reflectance coating in each unit prisms, so that the part light of injecting from light in part reflexes to light out part, bright dipping side in layers of prisms is provided with the black-tape layer simultaneously, and this black-tape layer utilizes light-sensitive surface to spill carbon dust with part and forms.Compared with prior art, the present invention utilizes the characteristic of reflective layer reflects light to increase the utilization factor of light, also can reach the requirement of spacing microminiaturization and high precision simultaneously, in addition, because the black-tape layer can utilize simple processing procedure to make, so also can reduce production costs and improve process rate.And,, also can improve contrast because the black-tape layer is arranged at the bright dipping side of layers of prisms.

Description of drawings

Fig. 1 is a synoptic diagram of existing screen;

Fig. 2 is a synoptic diagram of the prism plate of preferred embodiment of the present invention;

Fig. 3 is a synoptic diagram that utilizes the screen of preferred embodiment prism plate of the present invention;

Fig. 4 is a process flow diagram of the prism plate manufacture method of another preferred embodiment of the present invention;

Fig. 5 A～5G separates synoptic diagram for a component of the prism plate manufacture method of another preferred embodiment of the present invention.

Symbol description among the figure:

1 screen

11 Fresnel Lenses

12 convex lens layers

121 convex lens

13 light shield layers

3 prism plates

31 layers of prisms

32 reflectance coatings

33 black-tape layers

311 unit prisms

3111 reflecting parts

3112 light in part

3113 light out part

331 transmittance sections

332 light shielding parts

4 screens

5 prism apparatus

51 substrates

52 header boards

53 adhesion layers

6 Fresnel Lenses

7 prism plates

71 layers of prisms

711 light out part

72 shielding layers

712 reflecting parts

73 reflection horizon

74 light-sensitive surfaces

The part of 741 exposures

742 unexposed parts

Embodiment

Hereinafter with reference to relevant drawings, prism plate and manufacture method thereof according to preferred embodiment of the present invention are described.

As shown in Figure 2, according to theprism plate 3 of preferred embodiment of the present invention, comprise a layers ofprisms 31, areflectance coating 32 and a black-tape layer 33.

Wherein, layers ofprisms 31 has a plurality ofunit prisms 311, and eachunit prisms 311 has a reflectingpart 3111, a light inpart 3112 and a light out part 3113.Reflectance coating 32 is arranged at the reflectingpart 3111 of eachunit prisms 311, so that the part light of injecting from light inpart 3112 reflexes to light outpart 3113, another part light of injecting from light inpart 3112 directly is incident upon light out part 3113.Black-tape layer 33 has at least onetransmittance section 331 and at least onelight shielding part 332, and black-tape layer 33 is arranged on the layers ofprisms 31, andtransmittance section 331 fits with light outpart 3113.

As shown in Figure 2, in present embodiment, it is one trapezoidal that the section ofunit prisms 311 can be, and the prism ofunit prisms 311 is reflectingpart 3111, and the end face ofunit prisms 311 is a light outpart 3113.

In present embodiment,unit prisms 311 can be one dimension design prism or is the two-dimensional design prism.Whenunit prisms 311 designs prism for one dimension, can control the visual angle of beholder's left and right horizontal.In addition, whenunit prisms 311 is the two-dimensional design prism, can control beholder's left and right horizontal and vertical up and down visual angle simultaneously.

In addition, the material of thereflectance coating 32 of present embodiment can be metal, and for example, the material ofreflectance coating 32 can be aluminium (Al).

Moreover the material of the black-tape layer 33 of present embodiment can comprise light binding, and for example, black-tape layer 33 can comprise ultraviolet light (UV) glue.In addition, thelight shielding part 332 of black-tape layer 33 can be light binding and spills carbon dust and form, andtransmittance section 331 andlight shielding part 332 are adjacent staggered and establish.In present embodiment, black-tape layer 33 is used to stop the external environment reflection of light, to increase whole contrast.

For making explanation clearer, below will illustrate the situation thatprism plate 3 is used in liquid crystal projector or the employed screen of digital light treating apparatus.

As shown in Figure 3, screen 4 is made up ofprism apparatus 5 and Fresnel Lenses 6, andprism apparatus 5 is established with Fresnel Lenses 6 mutual neighbours.Wherein,prism apparatus 5 is made up of asubstrate 51,prism plate 3 and aheader board 52, andprism plate 3 is arranged on thesubstrate 51, andheader board 52 utilizesadhesion layer 53 andprism plate 3 to bind mutually.In this,substrate 51 is a transparency carrier, and material can be selected from PET, PVC or other macromolecular material.Andadhesion layer 53 diffusion particle (diffuser powder) that can mix, to increase screen viewing angle.In addition, the function of screen 4 is close with the screen of aforementionedprior art 1, does not repeat them here.

Moreover as shown in Figure 4, the prism plate manufacture method according to another preferred embodiment of the present invention comprises the following step: form a layers of prisms 71 (step S01); Light outpart 711 in layers ofprisms 71 forms a shielding layer 72 (step S02); Reflectingpart 712 in layers ofprisms 71 forms a reflection horizon 73 (step S03); Remove shielding layer 72 (step S04); One light-sensitive surface 74 is set in layers ofprisms 71, so that light-sensitive surface 74 and light outpart 711 fit (step S05); (step S06) exposes; And spill carbon dust (step S07) in light-sensitive surface 74unexposed parts 742.

Please refer to Fig. 5 A again, in step S01, form layers ofprisms 71.

Please refer to Fig. 5 B again, in step S02, in the light outpart 711formation shielding layers 72 of layers of prisms 71.In this,shielding layer 72 can utilize coating printing ink mode to form.

Please refer to Fig. 5 C again, in step S03, in the reflectingpart 712formation reflection horizon 73 of layers of prisms 71.In this, the reflectingpart 712 of layers ofprisms 71 utilizes evaporation coating method to formreflection horizon 73.

Please refer to Fig. 5 D again, in step S04, remove shielding layer 72.In this, utilize washing to removeshielding layer 72.

Please refer to Fig. 5 E again, in step S05, light-sensitive surface 74 is set, so that light-sensitive surface 74 fits with light outpart 711 in layers of prisms 71.In this, light-sensitive surface 74 can be light binding, and for example, light-sensitive surface 74 can be the ultraviolet optical cement.

Please refer to Fig. 5 F again, in step S06, expose.In this, expose in the light inlet side of layers of prisms 71.Wherein, the part ofexposure 741 is hardened because being subjected to rayed, andunexposed part 742 has tackness.

Please refer to Fig. 5 G again, in step S07, spill carbon dust in light-sensitive surface 74 unexposed parts 742.So the light-sensitive surface 74 of spilling carbon dust is a light shielding part, the light-sensitive surface of not spilling carbon dust is a transmittance section.

Via above-mentioned steps, form aprism plate 7.

From the above, in prism plate of the present invention and manufacture method thereof, be provided with reflectance coating in each unit prisms, so that the part light of injecting from light in part reflexes to light out part, bright dipping side in layers of prisms is provided with the black-tape layer simultaneously, and this black-tape layer utilizes light-sensitive surface to spill carbon dust with part and forms.Compared with prior art, the present invention utilizes the characteristic of reflective layer reflects light to increase the utilization factor of light, also can reach the requirement of spacing microminiaturization and high precision simultaneously, in addition, because the black-tape layer can utilize simple processing procedure to make, so also can reduce production costs and improve process rate.And,, also can improve contrast because the black-tape layer is arranged at the bright dipping side of layers of prisms.

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 scope of claims its equivalent modifications of carrying out or change.

Claims (8)

Translated fromChinese

1.一种棱镜板制造方法，其特征在于，包含下列步骤：1. A prism plate manufacturing method, is characterized in that, comprises the following steps:形成一棱镜层；form a prism layer;于该棱镜层的一出光部形成一遮蔽层；forming a shielding layer on a light exit portion of the prism layer;于该棱镜层的一反射部形成一反射层；forming a reflective layer on a reflective portion of the prism layer;移去该遮蔽层；remove the masking layer;设置一感光膜于该棱镜层，以使该感光膜与该出光部相贴合；disposing a photosensitive film on the prism layer, so that the photosensitive film is bonded to the light emitting part;进行曝光；以及exposure; and于该感光膜未曝光的部分洒上碳粉。Sprinkle carbon powder on the unexposed part of the photosensitive film.2.如权利要求1所述的棱镜板制造方法，其中，该棱镜层具有复数个单元棱镜，每一单元棱镜具有该反射部、该入光部与一出光部。2 . The manufacturing method of a prism plate as claimed in claim 1 , wherein the prism layer has a plurality of unit prisms, and each unit prism has the reflection part, the light incident part and a light exit part.3.如权利要求1所述的棱镜板制造方法，其中，该遮蔽层利用涂布油墨方式所形成。3. The manufacturing method of the prism plate according to claim 1, wherein the shielding layer is formed by coating ink.4.如权利要求1所述的棱镜板制造方法，其中，于该棱镜层的该反射部蒸镀该反射层。4. The manufacturing method of the prism plate as claimed in claim 1, wherein the reflective layer is evaporated on the reflective portion of the prism layer.5.如权利要求1所述的棱镜板制造方法，其中，利用水洗去该遮蔽层。5. The manufacturing method of a prism plate as claimed in claim 1, wherein the masking layer is washed away with water.6.如权利要求1所述的棱镜板制造方法，其中，该感光膜为光固胶。6. The method for manufacturing a prism plate as claimed in claim 1, wherein the photosensitive film is photocurable glue.7.如权利要求2所述的棱镜板制造方法，其中，该单元棱镜的剖面为一梯形，该单元棱镜的斜侧面为反射部，该单元棱镜的顶面为出光部。7. The method for manufacturing a prism plate as claimed in claim 2, wherein the section of the unit prism is a trapezoid, the inclined side surface of the unit prism is a reflection part, and the top surface of the unit prism is a light exit part.8.如权利要求2所述的棱镜板制造方法，其中，该单元棱镜为一维设计棱镜或为二维设计棱镜。8. The manufacturing method of a prism plate according to claim 2, wherein the unit prism is a one-dimensional design prism or a two-dimensional design prism.

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