TW468059B - Light beam polarization converter - Google Patents

Abstract

The present invention provides a light beam polarization converter to convert the non-polarized light beam of the illuminating light source into a single polarization, which is suitable for use in various electro-optical systems, such as a liquid crystal projection display. The light beam polarization converter of the present invention makes the incident light be focused by the undulated surface of the lower lid and enter the substrate, and a series of reflection, phase delay, and optical polarization conversion are generated through the polarization beam splitting film and phase retardation film. Finally, it passes through the polarization beam splitting film and becomes the light source of an output beam with a single polarization.

Description

468 059 V. Description of the invention (1) Background of the invention 1. Field of the invention The present invention provides a light-to-polarity converter for converting a non-polarized light source to a single polarized light source. For various types of optoelectronic systems, such as LCD projection display settings. 2. Conventional technical description ′ Since many optoelectronic systems (such as liquid crystal projection displays) are non-luminous display devices, an external light source must be used to achieve the display function. Recently, the display brightness requirements of projection TVs have greatly increased, so the efficiency of the use of light sources is increasingly important. With US Patent No. 5, 1 2 2, 8 9 5 (name: Polarization converter for convert i ng randomly polarized light to linearly polarized light, the inventors: I Takanashi, S. Nakagaki, I. Negishi, T.

Suzuki, F. Tatsumi, R. Takahashi, and K. Maeno) as an example. The purpose is to convert non-polarized light from a light source into linear polarized light with a single polarized state, that is, to provide a ρ-s converter. . Among them, P-polarized light refers to the direction where the electric field oscillation direction of the light wave is parallel to the light incident surface, and S-polarized light refers to the direction where the electric field oscillation direction of the light wave is perpendicular to the incident surface. Reference is made to FIG. 1, which is a schematic diagram of the structure of a conventional liquid crystal projection display module. The light emitted by the light source 10 passes through the parallelizing lens 11, the diffusion plate 12, and the PS converter 13, and then passes through. After the dichroic mirrors 14, 15 and 6 are processed, the light is sent to the liquid crystal display respectively.

V. Description of the invention (2) 301, 302, and 303 'are finally thrown to the glory (not shown) through the projection lens. The main function of the P-S converter 13 is to reduce the loss of light energy caused by the liquid crystal displays 301, 302, and 303 that screen the specific polarized light. 'Refer to Figure 2, which is a three-dimensional schematic diagram of a conventional P-S converter. After the non-polarized light beam I emitted from the light source enters from below the P-S converter, it is emitted from above to become a single S-polarized light beam. Referring again to Fig. 3 ', which shows the internal optical path of a conventional P-S converter, Fig. 1' is a beam J 1 among most beams emitted by a light source for analysis. After the light beam 11 enters the P: s converter 13 through the anti-reflection coating 70, it becomes a light beam 12 having both P and S polarization states, and then enters the polarization beam splitting film 73. The 'P polarization beam 14 penetrates the polarization beam splitting The film 73 is rotated by the half-wave plate 78 to be polarized, and then passes through the anti-reflection coating 79 to become the light beam I 6 with the desired s-polarized state. The component of the light beam 12 that cannot pass through the polarizing beam splitting film 73 is reflected into a light beam 13 with an S polarization state, and then is reflected by a high reflection coating 75, and then passes through an anti-reflection coating 77 to output another light beam 16 with an S polarization state. ° Because the light source incident on the ρ-s converter 13 from the lower surface of Figure 3 to the ρ-s converter 13 cannot produce the single polarization effect described above, the singularization efficiency of the polarized state of the conventional p_S converter is only up to 5 °. %. In addition to its low efficiency, the structure of the conventional structure is complex, and the cost of its mass production process remains high. There are also disadvantages of high power consumption in use.

1 '4 68 059 V. Description of the invention (3) Summary of the invention In view of the above problems, the purpose of the present invention is to provide an optical polarized state converter, which can achieve the polarized state conversion with very low light energy loss. Mass production, and can significantly reduce manufacturing costs. In addition to exerting the above-mentioned functions, it is more suitable to integrate with the conventional structure into a high-performance light polar converter. In order to achieve the above objective, the present invention provides a polarized converter for converting a non-polarized light source irradiating a light source into a single polarized light. The polarized converter includes: a lower cover having a lower surface with a surface undulation and Ridge-shaped upper surface; a substrate having a ridge-shaped lower surface sufficiently close to and adjacent to the upper surface of the lower cover, and another upper surface; a phase retardation film having a high reflectivity and partially disposed on the substrate Between the material and the lower cover; and a polarizing beam splitting film, which is located on the substrate, allows light of different polarizing states to be transmitted through or reflected. In order to exert the optical effect, the distance between the ridges of the ridge surface of the lower cover may be fixed or not fixed. The polarization of the electric field of the polarized light reflected by the polarized beam splitting film

059 V. Description of the invention (4) Parallel beams can play a large wave passing through the converter's undulating surface (eg, the undulating surface of a granular film is used to control the output angle of the light; strong light passes through the converter's irradiating light source. The polarized state converter 'includes: an upper surface; the ridge lines of the direction and the ridged surface of the inferior ridge should not be equal to each other = the degree of freedom in the design of the converter. Moreover, in order to increase the rate, it can be used in the polarizing beam splitter film. A thin film with various shapes, spherical or non-spherical surfaces is attached to it, and the undulating lower surfaces of this lower cover correspond to each other and share a common vehicle. At the same time, they can have a common focus with each other, so it can be efficient. ^ The present invention further provides a polarized turn-down cover for converting a light source into a single polarized light. The cover has a lower surface and a lower surface; a scattering structure is provided on the lower cover for conversion. Beam-biased phase retardation film, which has high reflectivity, is partially placed on the scattering junction; and ^ allows light with different polarized states to get a polarized beam splitter film 'on the substrate to penetrate Or be reflected. The above structure is a soft structure due to the polarizing beam splitting film and the thin knots σ of the various undulating surfaces. When it is used in the converter, it can be peeled off from the flat surface of the base material to form upper and lower parts, which are respectively attached to the custom. Converter or transparent flat optics

5. Description of the invention (5) The side of the material can also achieve the function of polarized light splitting. In view of the above characteristics, it can be seen that the optical polarization converter of the present invention has a simple structure and is easy to manufacture, and the optical efficiency achieved by the present invention is better than that of a conventional user. In particular, the conversion of the present invention can be easily combined with conventional optical materials, which is a major feature. The diagram is briefly explained. The above-mentioned and other characteristics, functions, and advantages of the light polarized converter according to the present invention can be fully understood through the detailed description of the following embodiments and with reference to the accompanying equations, wherein these diagrams Figure 1 is a sectional view of the structure of a conventional LCD projection display module; Figure 2 is a perspective view of a conventional PS converter; Figure 3 is a light path diagram inside a conventional PS converter; Figure 4 FIG. 5 is a cross-sectional view of an optical polarization converter according to an embodiment of the present invention; FIG. 5 is an explanatory diagram of an interface formed by stacking two films according to US Patent Nos. 5, 9 6 2, 11 4;

Page 8 4 R 8 05 9 V. Description of the invention (6) Figure 6 is an explanation of the sound transmission and reflection effects of the polarizing beam splitting film on two different polarized light according to the US Patent No. 5,962,114. FIG. 7 is a schematic diagram of an optical path traveling in an optical polarization converter according to the present invention / embodiment; FIG. 8 is a perspective view of an optical polarization converter according to another embodiment of the present invention; FIG. 9 shows the relationship between the reflectance of the phase retardation film with high reflectivity and the polarized component of PS according to the embodiment of the present invention and the wavelength; FIG. 10 shows the phase delay with high reflectivity according to the embodiment of the present invention. The relationship between the relative phase difference of the film's PS polar component and the wavelength; Figure 11 is a film with cylindrical protrusions on the surface of the polarizing beam splitting film according to the embodiment of the present invention; Figure 12 is According to the embodiment of the present invention, a film with a square pyramid-shaped protrusion on the surface is attached to the polarizing beam splitting film; and FIG. 13 is a wearing surface view of a light polarizing converter according to another embodiment of the present invention. The upper surface of the cover is of a non-specific shape and contains a scattering Structure.

Page 9 468059 V. Description of the invention (7) Symbol description of main components in the picture 1 0 light source 1 1 lens 1 2 diffuser

1 3P-S converter 1 4 dichroic mirror 1 5 dichroic mirror 1 6 reflector 70 reflective coating 7 3 polarizing beam splitter film 7 5 high reflection clock film 77 anti-reflection coating

Page 10

V fd B Ο 5 9 V. Description of the invention (8) 7 8 Half-wave plate 79 reflective coating 81 lower surface 1 0 0 light polarized converter 1 1 0 lower cover 1 1 5 phase retardation film 120 substrate 1 40 polarizing beam splitting film 1 5 0 scattered structure 301 liquid crystal display 3 0 2 liquid crystal display 3 0 3 liquid crystal display

4 6 8 Ο 5 9 Jade, description of the invention (9) Detailed description of the preferred embodiment with reference to Fig. 4 'shows a cross-sectional view of a light polarized converter 100 according to an embodiment of the present invention. The converter 100 is a laminated structure, which includes a lower cover 110, a base material 120, and a polarizing beam splitting film 140. A phase delay is provided at a part of the position between the lower cover 110 and the base material 120. The film 115 and the lower surface of the lower cover 110 are undulated, and an anti-reflection coating can be plated thereon to increase the efficiency of the incident light beam I penetrating from the bottom to the top. The upper surface of the lower cover 110 is a ridge-shaped surface. In this embodiment, the ridge angle between adjacent ridge lines is 90 degrees. Therefore, the ridge angle of the lower surface of the substrate 120 is also 90 degrees. The phase retardation film is located between the lower cover 110 and the substrate 120, and the incident light beam I can enter the lower cover 110 after being focused by the undulating surface of the lower cover 110. Enter the substrate 120. The lower surface of the lower 篕 11 can be cylindrical, spherical, etc., but it is not limited to these shapes, as long as the incident light beam I can be focused and the focused incident light beam penetrates into the substrate from the interface without a phase retardation film after focusing. Material 120 is sufficient. The polarizing beam splitting film 140 is a kind of thin film which can penetrate or reflect light of different polar states to achieve light separation. For example, the multilayer film disclosed in U.S. Patent No. 5,96,11,14 can be used as the polarizing light-splitting film of the present invention. The contents of this patent are incorporated herein by reference. Referring to FIG. 5, two thin films are superposed along the z direction, and the refractive indexes along the three directions of χ, y, and z are (nlx, nly, niz), (n2x, n2y, n2z). The revealed technology shows that if: (niy_n2y), (nlz_n2z

Page 12 468059 V. Description of the invention (ίο)) When the two formulas have the same sign, the polarized light in the X direction will penetrate and the polarized light in the y direction will be reflected; therefore, it is possible to separate light with different polarized states. The role. Referring to Fig. 6, the multilayer film is a multilayer film made by 3M Company. 'PEN (2,6-polyethylene naphthalate) and coPEN (copolymer derived from ethyleneglycol, naphthalene di carboxy 1 ic acid and some other acids such as t erephtha 1 at e) is composed of two materials that can pass polarized light in a specific direction and reflect polarized light perpendicular to the direction. Therefore, the multilayer film can be used as a polarizing beam splitting film in the present invention. Referring to FIG. 7, it is a diagram showing an optical path after the incident light beam I enters from the lower cover Π0. In the seventh figure, the p-polarized component of the light beam is indicated by a solid arrow, and the hollow arrow is used to indicate the S-polarized component. Here, the P-polarized component refers to a polarized state that can pass through the polarized beam splitting film; S-polarized The component refers to a polar state that is perpendicular to the P polar component and will be reflected by the polar polarizing film. From this light path diagram, it can be seen that after the light beam I is focused on the undulating surface of the lower cover 110, it passes through the place where there is no phase retardation film between the lower cover 110 and the substrate and enters the substrate 120. The β polarized component is not affected by the polarized beam splitting film 140. The impact can be directly emitted from its upper surface. The s polarized component is reflected by the polarized beam splitter film 140, and after reflected by the ridge-shaped lower surface of the substrate, it is gradually transformed into a beam with both P and S polarized components under the action of the phase retardation film. After that, the ρ polarized component is emitted through the polarized beam splitting film 140, and the S polarized component is gradually reflected and phase-delayed into a light beam having both P and S polarized components. Fig. 7 shows an embodiment in which the pitch between the ridge lines on the lower surface of the ridges of the substrate is the same.

Page 13 4 6 8 05 9 V. Description of the invention (11) It is worth noting that the direction of field polarization is reflective coating homogeneous retardation film. However, the retardation effect of the parallel ridge line is 90 degrees. It is to be noted that, when the electricity of the S-polarized light reflected by the polarizing beam splitter film 140 is not parallel to the ridge line of the lower ridge surface, any tradition can be used in the present invention as the phase disclosed in the order of this document is S-polarized. When the polarization direction of the electric field of the aurora and the ridge-shaped surface of the lower cover, the S-polarized light system cannot convert the phase and polarized state of the phase retardation film, so the magnetic phase retardation must be added to this film. The phase retardation film can generally be provided on the ridged surface of the lower cover Π by steaming, or it can be composed of different materials. The effect of phase retardation can also be achieved by the phase 'plane roughness. In this embodiment, the design of the ridges on the ridge surface allows the light beam to be continuous on the lower surface of the substrate. FIG. 8 shows another embodiment of the converter 100, in which the ridge spacing of the ridge lines is not the same. 'And the direction of vibration caused by the polarized beam splitter is not parallel to the ridge line (the percentage of electric phase deviation of the phase delay film disclosed in the present invention can reach ΐ the degree of freedom in the design of the film. The effect of improving the phase delay is further highlighted The following description of the present invention provides the following description, in order to better understand the structure of the converter of the present invention and the lower surface of the upper and lower cover 110 is a granular, earthy or aspheric undulating surface, which

Page 14

V. Description of the invention (12) '------. A surface generally has a ridged surface, but the surface below the lower cover 110 is a spherical aspheric wave that can focus the incident light beam into a point light source% ... At this time, the upper surface of the lower cover may have a tapered structure. To sum up, one of the following properties is to ensure that the incident beam enters the substrate efficiently. Another function of the upper surface of the important function is to provide a place where the phase retardation coating is attached. The embodiment of the cover actually uses a ridge surface as the upper surface of the lower cover, but it should be used to achieve similar functions to the ridge surface. Belongs to the present invention ^ shape-type skill < " The lower surface of the substrate is a ridge-shaped surface, and the adjacent ridge lines of the ridge-shaped surface must be the same. The ridge-shaped distances need not be the same, but the adjacent surfaces can no longer be approximated so that various films can be placed in between and joined together.疋 Based on the manufacturing process, the basic system can be any optical material, such as armour dragon Λ T, propylene methyl ester PMMA, polycarbonate PC, or ART0N (brand name) and other plastic materials = warm all kinds of glass. When designing an optical money film ', you must first determine the refractive index of the base #: 光 #. Table 1 lists the water absorption and refractive index of ART0N at different wavelengths. The relationship between the reflectance, relative phase difference, and wavelength of the polarized component of the phase retardation film with high reflectivity is shown in Fig. 9 and Fig. 9. It is worth mentioning that in the actual manufacturing process, the phase retardation film is applied on the upper part of the lower cover, and the position that does not need to be applied is the ridge top position. Therefore, the red upper surface can be completely coated A phase retardation film is provided, and unnecessary portions are removed by polishing. For example, if the substrate has an optical coefficient 丨. 5 3

3 8 05 9 V. PMMA of invention description (13), when the table below is 700nm, it is typically ART0N and others. The ridge angle of the face is 90 degrees, and the conditions for forming the film and the thickness of the forged film are the same as those described above. The wavelength of the incident beam is 400. If the composition of the substrate can be checked in Table 3 to improve the penetration efficiency of the light beam, a thin film with various undulating surfaces can be attached on the polarizing beam splitting film. The undulating surface can be a cylindrical protrusion as shown in Figure ^ Or, as shown in Figure 12, the square-cone-shaped protrusions facilitate the light beams to be emitted in parallel or at other appropriate angles. For example, when the incident light beam is incident through the lower cover at a nearly parallel angle, it has a undulating surface. The upper surface of the film and the undulating surface of the lower cover correspond to each other and are conjugated, so the direction of the output and polarized beam can be controlled, and the diffusion angle of the light $ can be controlled to determine the output brightness of different visions. Referring to FIG. 13 'It shows another preferred embodiment according to the present invention' wherein the upper surface of the lower cover 110 does not have a specific shape, and a scattering structure ljO is disposed on the lower cover 110. A phase retardation film 115 with high reflectivity is located between the scattering structure 15 and the lower cover 110. The function of the scattering structure 150 is to convert the polarized state of light based on the principle of scattering. The phase retardation film can perform phase delay to convert the polarized state of light. Its main function is to use its high reflectivity to reflect light upward. To avoid light entering the chancre and leaving this system. In addition, removing the substrate 20 and making the scattering structure 150 directly connect to the polarizing beam splitting film 4 40 can also be a complete light polarizing converter.

Page 16 4 68 059 V. Description of the invention (14) Although the above describes the preferred embodiment of the optical polarization converter of the present invention, it can be seen that the detailed description is for illustration only. Modifications or changes are deemed to not depart from the spirit and scope of the present invention. In other words, the substantial scope of the present invention is defined in the following patent application scope.

Page 17 468059 Table 1 ARTON FX2 «Material and Trade Property Chain · Morborjnene Side Chain: Polyester (Power Fiber Absorption)%) Measurement: Electrical View 7 ^ 4.70 uni 656 nm 58H nm 4S6 nm 436 nm 0,01 1.5161 1.5198 1.5227 1.5298 1,5354 0.25 1.5163 1.5200 L. 5230 1.5300 1.5357 Temperature ΓΟ Assay 794.76 nm 656 nm iSSnm 486 mn 436 run 30 1.515 L519 1.521 1.528 1-534 40 1-514 1.51S L520 1 ^ 27 L533 4 8 B 05 9 Table 2 Composition and film thickness of a typical phase retardation coating with high reflectivity (unit: Nailai, substrate: PMMA) ZnS 202.21 'MgF2 200.00, ZnS 83.66-MgF2 200.00' ZnS 58 * 46 , MgF2 203.95, ZnS 200,19, MgF2 202,94, ZnS 78.42 'MgF2 184.10' ZnS 210.19, MgF2 196.22, ZnS 235.49, MgF2 404.42-ZnS 105.38, MgF2 165.89, ZnS 219.30 M2 ZnF2 gt; F2 '' ZnS 5730-MgF2 264.8 and ZnS 168.19 '' MgF2 200.24, ZnS 95.51 '' MgF2 146.82, ZnS 141.62, MgF2 62.71 '' ZnS 61.65 '' MgF2 245,83, ZnS 203.82 '' MgF2 110.37, ZnS, 49-58.75. Ag 61.14 059 Table 3 The composition and film thickness of a typical high reflectivity phase also retards the coating (unit ·· nano, substrate: ΑΕΤΟΝ ™) ZnS 202.44 'M§F2 200.00, ZnS 83.68, MgF2 200.00, ZnS 60.66' MgF2 206.53 ' ZnS 200.00 'MgF2 200.00' ZnS 85.56, MgF2 176.92, ZnS 207.83, MgF2 186.64, ZnS 228.17, MgF2 450JO 'ZnS 102.87' MgF2 163,44, ZnS 223.36-MgF2 193.18 'ZnS 206.02.20 '02 .10 '25 ZnS 180.50 > MgF2 238.48 'ZnS 8L97' MgF2 133.27, ZnS 132.49 'MgF2 10140, ZnS 62.55' MgF2 264.24 'ZnS 189.91' MgF2 85.94-ZnS 59'96, MgF2 14079, Zn Ag 60.92 89.76

Claims (1)

46805S VI. Application for Patent Scope 1. An optical polarized state converter for converting non-polarized light from a light source into a single polarized state, including: a lower cover, which has a lower surface with undulations and a ridged upper surface : A substrate with a ridge-shaped lower surface sufficiently close to and adjacent to the upper surface of the lower cover, and another upper surface; a phase retardation film with high reflectivity, located partially between the substrate and the lower cover ; And-polarizing beamsplitter film, located above the substrate. I 2. For example, the light polarized converter of the first patent application range, wherein the ridge spacing of the upper surface of the lower cover is different. 3. For the light polarized converter of the first scope of the patent application, the ridge spacing on the upper surface of the lower cover is the same. 4. For example, the polarized light polarized converter of the scope of the patent application, wherein the ridge line on the upper surface of the lower cover and the polarized light polarized by the polarized beam splitter are not parallel to each other. 5. The light polarized converter as described in the first patent application scope, where the lower cover Page 19 468 05 9 VI. Scope of patent application The included boundary of adjacent ridges on the upper surface is between 45 and 135 degrees. 6. For example, the light polarized converter of the 1st member of the patent application scope, wherein the lower surface of the lower cover is a granular undulating surface. 7. The light polarized converter according to item 1 of the patent application, wherein the lower surface of the lower cover is a spherical undulating surface. 8. The light polarized converter according to item 1 of the patent application, wherein the lower surface of the lower cover is an aspheric undulating surface. 9. For example, the light polarized converter of the scope of the patent application, wherein the lower surface of the lower cover has most regular protrusions. 10. If the light polarized converter of the first scope of the patent application, the lower surface of the lower cover has a plurality of staggered protrusions β 11. If the light polarized converter of the first scope of the patent application, the ridge shape of the lower cover The upper surface making mold is completed by plate-engaging technology. 12. For the light polarized converter according to item 1 of the scope of patent application, the ridge-shaped upper surface of the lower cover is made by electroforming technology. 13. For example, the light-polarized polar converter of the scope of patent application, the lower cover Page 20 4 6 a 05 9 6. Scope of Patent Application " '' --- The ridge-shaped upper surface manufacturing mold is completed by a micro-optical and electro-mechanical process. 13. The light polarized converter according to item 1 of the stated patent scope, wherein the ridge-shaped upper surface of the lower cover is made by injection molding. 14 'The light polarized converter according to item 1 of the patent application scope, wherein the ridge-shaped upper surface of the lower cover is made by rolling technology. 15. For example, the light polarized converter of the first patent application range, wherein the ridge-shaped upper surface of the lower cover is made by flat pressing technology. 16. For example, the polarized light polarized converter of item 1 of the patent application range, wherein the polarized light splitting film is a 408-layer multilayer film composed of PEN and coPEN. 1 7 ′ The light polarizing converter as described in the first item of the patent application scope, wherein the polarizing beam splitting film is a 204-layer multilayer film composed of PEN and coPEN. 18. For example, the polarized light polarized converter of the scope of the patent application, wherein the polarized light splitting film is PET (Ρ〇1 yethy 1 ene erephtha 1 ate) and Ecde 1 (a thermoplastic elastomer available from Eastman Chemical). Composition of 601 layers of multilayer film. 19. For example, the polarized light polarized converter of the first patent application range, wherein the polarized light splitting film is a 449-layer multilayer film composed of PEN and coPEN. Page 21 6. Scope of Patent Application 2 0. For the light polarized converter of item 1 of the scope of patent application, the polarization polarizing film is a 601-layer multilayer film composed of PEN and coPEN. 21 · For example, the polarized light polarized converter of item 1 of the patent application scope, in which the polarized polarizing film is a 449-layer multilayer film composed of PET and coPEN. 2 2. For example, the polarized light polarized converter in the first patent application scope, in which the polarized light beam is a 481-layer multilayer film made of PEN and sPS (syndiotactic polystyrene). 23. For example, the polarized light polarized converter of the first patent application range, wherein the polarized light splitting film is a 601-layer anti-reflective multilayer film composed of PEN and coPEN. 2 3. For example, the photopolarization converter of the first scope of the patent application, wherein the phase-delayed mineral film is a dry film formed by optical precision coating. 24. A light polarized state converter for converting non-polarized light rays irradiating a light source into a single polarized state, comprising: a lower cover having a lower surface with undulating surface and a ridged upper surface: a substrate having A ridge-shaped lower surface sufficiently close to and adjacent to the upper surface of the lower cover, and another upper surface; 4 ο B Q5 9 VI. Patent application scope-a phase retardation film with high reflectivity, located at a position between the substrate and the lower cover; and a polarizing beamsplitter film 1 above the substrate; and a undulating surface Thin film, located above the polarizing beamsplitter film. 25. For example, the polarized light polar converter of the scope of application for patent No. 24, wherein the ridge spacing of the upper surface of the lower cover is different. 26. For example, the light polarized converter of the scope of application for patent No. 24, wherein the ridge spacing on the upper surface of the lower cover is the same. 27. For example, the polarized polarized light converter of the scope of application for patent No. 24, wherein the ridge line on the upper surface of the lower cover and the polarized polarization angle of the polarized beam splitting film are not parallel to each other. 28. For example, the photopolarization converter of item 24 of the patent application range, wherein the included boundary of adjacent ridges on the upper surface of the lower cover is between 45 degrees and 135 degrees. 29. For example, the light polarized converter of the scope of application for patent No. 24, wherein the ridge-shaped surface of the lower cover is made by the mold-making technology. Page 23 4 6 8 0 5 9 6. Application Division msi " 3 y. For example, the light polarized converter of the 24th scope of the patent application, in which the ridge surface of the lower jaw is made by electroforming technology. Reproduced. 31. For example, the photopolarization converter of item 24 of the scope of patent application, wherein the ridge-shaped surface of the lower cover is made by a micro-optical electromechanical process. 32. For example, the light polarized converter of the scope of application for patent No. 24, wherein the ridge surface of the lower cover is made by injection molding. 33. For example, the light polarized converter according to item 24 of the patent application, wherein the ridge surface of the lower cover is made by rolling technology. 34. For the light polarized converter of the 24th scope of the patent application, the ridge surface of the lower cover is made by flat pressing technology. 3 5 · For example, the polarized light polarized converter of item 24 of the scope of patent application, in which the polarized beam splitting film is a 408-layer multilayer film composed of PEN and coPEN. 3 6. For example, the polarized light polarized converter of item 24 of the scope of patent application, wherein the polarized light splitting film is a 204-layer multilayer film composed of PEN and coPEN. 3 7. For example, the polarized light rod converter of item 24 of the patent application scope, in which the polarizing beam splitting film is PET (Polyethylene terephthalate) and Ecdel (a thermoplastic elastomer available from Eastman Page 24 〇 8 05 9 VI. Patent application scope Chemical) 601-layer multilayer film. 38. For example, a polarized light polarized converter according to item 24 of the application, wherein the polarized beam splitter film is a 449-layer multilayer film composed of PEN and coPEN. 3 9. For example, the polarized light polarized converter of item 24 of the scope of patent application, wherein the polarized beam splitting film is a 601-layer multilayer film formed by PEN and coPEN. 40. For example, the polarized light polarized converter according to item 24 of the application, wherein the polarized light splitting film is a 449-layer multilayer film composed of PET and coPEN. 41. For example, the polarized light polarized converter of item 24 of the application, wherein the polarized light splitting film is a 481-layer multilayer film made of PEN and sPS (syndiotactic polystyrene). 42 * For example, the polarized light polarized converter of item 24 of the patent application scope, wherein the polarized beam splitting film is a 601-layer anti-reflective multilayer film composed of PEN and coPEN. 43, such as the application of the patent No. 24 of the range of photopolarity converters, in which the phase-only delayed mineral film is made of dry film formed by optical precision coating. 4j. The light polarized converter according to item 24 of the patent application, wherein the lower f lower surface and the film with undulating surface are both granular ridges. The surfaces correspond to each other and are conjugated. Surface, Qi * 4 b β Ο 5 9 VI. Patent scope 45. For example, the polarized light converter of the 24th scope of the patent application, wherein the lower surface of the lower cover and the film with the undulating surface are spherical undulating surfaces, and their surfaces correspond to each other. And conjugate. 46. For example, the polarized polarized converter of item 24 of the scope of patent application, which makes the lower surface of the chin and the film with the undulating surface are aspherical undulating surfaces, which correspond to each other and are conjugated. 47. For example, the light polarized converter according to item 24 of the patent application, wherein the thin film with undulating surface has most regular protrusions. 48. For example, the light polarized converter according to item 24 of the patent application, wherein the thin film with undulating surface is mostly staggered protrusions. 49. A light polarized state converter 'can convert non-polarized light of a light source into a grass-polarized state, including. The lower cover has a lower surface with an undulating surface and another upper surface: a scattering structure' having It is sufficiently close to the upper surface of the lower cover and adjacent to the lower surface 'and the other upper surface; the phase retardation film has a southern reflectivity and is located between the scattering structure and the lower cover. 4 6B 05 9 Position; a substrate ^ has a lower surface sufficiently close to and adjacent to the upper surface of the scattering structure, and another upper surface; a polarizing beam splitter film, which is located above the substrate. 50. For the light polarized converter of the 49th scope of the patent application, the lower surface of the lower cover of the application is an aspheric undulating surface. 51. For example, a light polarized converter according to item 49 of the patent application, wherein the lower surface of the lower cover has most regular protrusions. f 52. The light polarized converter according to item 49 of the patent application, wherein the lower surface of the lower cover has a plurality of staggered protrusions. 53. The light polarized converter according to item 19 of the patent application, wherein the lower surface of the lower cover is a granular undulating surface. 54. The light polarized converter according to item 19 of the patent application, wherein the lower surface of the lower cover is a spherical undulating surface. 5 5. For example, the light polarized converter of item 49 of the scope of patent application, in which the lower cover is completed by a shower mold. Page 27 4 68 059 6. Scope of patent application 56. For example, the photopolarization converter of item 49 in the scope of patent application, the lower cover is completed by burning prayer. 57. For example, the light polarized converter of the 49th scope of the patent application, in which the lower cover is completed by means of emission. 58. For example, the photopolarization converter of item 49 in the scope of patent application, wherein the lower cover is completed by flat pressing. 59. For example, a light polarized converter according to item 49 of the patent application, wherein the phase retardation coating is a dry film formed by optical precision coating. 60. For example, the light polarized converter according to item 49 of the patent application scope, wherein the diffusing structure is made of paint. 61. For example, a light polarized converter according to item 49 of the application, wherein the scattering structure is completed with a surface roughness. 6 2. For example, the light polarized converter of the 49th scope of the patent application, wherein the scattering structure is completed by the difference of the optical coefficient of the material. 63. For example, the light polarization converter in the 49th scope of the patent application, wherein the polarization beam splitter film is a 408-layer multilayer film composed of PEN and coPEN. Page 28 468059 6. Scope of patent application 64. For example, the light polarized converter of item 49 in the scope of patent application, in which the polarizing beam splitting film is a 204-layer multilayer film composed of PEN and coPEN. 65. For example, the light polarized converter of the 49th scope of the patent application, wherein the polarized light splitting film is a 60 1 layer multilayer film composed of PET (Polyethylene terephthalate) and Ecdel (a thermop 1 ast ic elastomer available from Eastman Chemical) . 66. For example, the light polarized converter of the 49th scope of the patent application, wherein the polarized beam splitter film is a 449-layer multilayer film composed of PEN and coPEN. 67. For example, the light polarized converter of the 49th scope of the patent application, wherein the polarized beam splitter film is a 601-layer multilayer film composed of PEN and coPEN. 6 8. For the light polarized converter according to item 49 of the patent application scope, the polarized light splitting film is a 449-layer multilayer film composed of PET and coPEN. 6, 9, such as the scope of the patent application of the fourth item of the light polarized converter, where the polarizing beam splitter film is a PEN and SPS (syndiotactic polystyrene) multilayer film composed of 481 layers 5 7 0. As the scope of patent application 4 9 The light polarized converter of Xiang Xiang, wherein the polarized polarizing film is a 601-layer anti-reflective multilayer film composed of PEN and coPEN. / / ' Page 29