TWI491926B - A super stereoscopic vision separation element - Google Patents

Description

Super stereoscopic separation element

For the Auto-Stereoscopic Displaying Method and Technology, a Parallel Barrier Component or a Cylindrical Lens Array Component (hereinafter referred to as hereinafter) is generally used. The lens separation device (View Separation Device) provides a view separation optical function for displaying a naked-view 3D image for a multi-view combined 3D image ( The purpose of Glasses-Free 3D Image). The 3D image presented by the parallax barrier element generally has the characteristics of low ghost image (Ghost Image) and low brightness, and the 3D image displayed by the lens element has high ghost image and high brightness. That is to say, for the presentation of 3D images, the two conventional devices cannot meet the requirements of low ghosting and high brightness at the same time.

In view of the above problems, the composition of the Super Auto-stereoscopic 3D Image Display Device is proposed for the first time in the Republic of China Patent Application No. 102132216.

As shown in FIG. 1 , it is a schematic diagram of an ultra-stereoscopic three-dimensional image display device. The super-stereoscopic three-dimensional image display device 40 is mainly composed of a display screen element 50, a parallax barrier element 60, and a lens element 70 in the order of installation. The display of the ultra-stereoscopic three-dimensional image refers to the use of a parallax barrier element having an equivalent view separation function and a view separation element formed by the lens element to achieve the purpose of displaying a three-dimensional image. The configuration of the above-described visual separation element is hereinafter collectively referred to as a Super Auto-stereoscopic View Separation Component. In addition, in order to clearly indicate the direction and description of each component device, the coordinate system XYZ shown in the figure is for the viewer facing the hyperstereoscopic three-dimensional image display device 40 to set the X-axis system at the level. Direction, Y axis set to vertical The direction and Z-axis are set perpendicular to the image display surface of the device 40, and the coordinate system XYZ follows the Right-Hand Rule.

The display screen component 50 can be composed of a conventional display screen such as a liquid crystal, a plasma, an organic light emitting diode (OLED), or a light emitting diode (LED), and the screen has a color sub-pixel arrangement. , which can be formed by a conventional vertical strip, mosaic, triangle, and Pentile arrangement, for displaying a multi-view 3D composite image (not shown) composed of n scene images, wherein n ≧ 2.

Although the above patent does not mention the application of a Field-Sequential-Color LCD (FSC-LCD), the display screen element 50 can also be composed of an FSC-LCD. The FSC-LCD (not shown) is a liquid crystal display that does not use a color filter. It alternates between red, green, and blue backlights to continuously display red, green, and blue image images. At the time point, red, green, and blue images are sequentially displayed on the retina, and then the phenomenon of persistence of vision is used to present a full-color image.

The parallax barrier element 60 is composed of a transparent substrate 61, a parallax barrier structure 62, and a transparent protective film 63. The transparent substrate 61 is composed of a flat glass transparent glass or acrylic (PMMA), and the flat structure has a high degree of surface flatness.

The parallax barrier structure 62 is disposed on one surface of the transparent substrate 61 and is composed of a plurality of light blocking elements 62a and a plurality of light transmitting elements 62b. The light-shielding elements 62a and the light-transmitting elements 62b may have vertical strip-shaped or oblique strip-like structural features (as shown in FIGS. 2 to 3), and have individual , the horizontal width of B, and the unit structure width P _B , , B, P _B , with the following relationship:

Where n is the number of views.

The parallax barrier structure 62 is disposed at a display distance L _B in front of the display screen component 50 to provide a view separation optical effect for displaying the 3D image for the multi-view synthesis image.

In addition, the fabrication of the parallax barrier structure 62 is transparent to photolithography and convexity. For precision processes such as plate transfer and gravure transfer, the light-shielding elements 62a and the light-transmitting elements 62b may be copied onto one surface of the transparent substrate 61. Alternatively, a non-transparent film (not shown) may be applied to one surface of the transparent substrate 61, and a alignment technique and a precision positioning laser engraving machine (not shown) may be used. For the non-transmissive film, corresponding to the existence of the plurality of light-transmitting elements 62b, to hollow out the non-transmissive film at the place, the parallax can be completed by completing the production of the plurality of light-transmitting elements 62b. Fabrication of the grating structure 62.

Then, the light-shielding elements 62a and the light-transmitting elements 62b are covered with a transparent protective film 63, such as a cerium oxide (SiO ₂ ) film, to prevent the light-shielding elements 62a and the light-transmitting elements. The effect of 62b shedding and isolation of the environment, such as humidity.

The lens element 70 is composed of a plurality of lenticular lenses 71. The single lenticular lens 71 can be formed by a vertical strip or a slanted strip structure (as shown in FIGS. 4-5). There is a lens surface 72, a focal length f, and a unit structure width P _L . In addition, the lens surface 72 may be formed by a circular curved surface or a non-circular curved surface. For the focal length f and the cell structure width P _L , the following equations (3) to (4) are obtained to achieve the equivalent view separation effect.

f~L _B (3)

P _L =P _B (4)

Where L _B is the mounting distance, that is, the distance between the parallax barrier element 60, the lens element 70 and the display screen element 50. In fact, for the structure of the component stack shown in FIG. 1, the lens element 70 has a slight thickness. In the actual optical design, the focal length f of the lenticular lens is slightly larger than the mounting distance of the parallax barrier structure. L _B .

In addition, the above-mentioned light-shielding elements 62a and the light-transmitting elements 62b have an effect of providing an aperture in addition to the equivalent view separation. That is, the horizontal width of the light-shielding elements 62a and the light-transmitting elements 62b are changed by maintaining the unit structure width P _B unchanged. , B, for example: And order among them, The purpose of improving the brightness of the parallax barrier element 60 can be achieved by changing the horizontal width of the light-shielding elements 62a and the light-transmitting elements 62b. In addition, the following conditions can also be met: A phenomenon of reducing ghosting caused by the lens element 70 is achieved.

In addition, for the fabrication of the lens element 70, a roll-to-roll process or a hot stamp process can be used to fabricate a separate component, and then through the alignment. The process is mounted on the parallax barrier element 60. Alternatively, the lens element 70 is directly formed on the transparent protective film 63 of the parallax barrier element 60 by a technique of alignment and a process of thermal imprinting.

As described above, for the production of the parallax barrier element 60 and the lens element 70, a separate component is separately manufactured through a different process, and then through a process of alignment bonding to complete an ultra-stereoscopic separation. The production of components. For the above-mentioned individual and discontinuous processes, because of the lack of consistency in production, the demand for high precision, high efficiency, and low cost mass production cannot be met.

In view of the above-mentioned deficiency, the super stereoscopic separation element of the present invention mainly utilizes a Roll-to-Roll Manufacturing Process, a UV-Cured Imprint process and a letterpress. The processing of the transfer (Flexography Imprint) can simultaneously mount the lens element and the parallax barrier element on both sides of a soft transparent substrate to achieve mass production of the super stereoscopic separation element.

1‧‧‧Super stereoscopic separation element

10‧‧‧ lens elements

11‧‧‧Single cylindrical lens

12‧‧‧ lens surface

20‧‧‧Soft transparent substrate

30‧‧‧Disparity grating components

31‧‧‧ shading elements

32‧‧‧Lighting components

40‧‧‧Three-dimensional image display device

50‧‧‧Display screen components

60‧‧‧parallax grating elements

61‧‧‧ Transparent substrate

62‧‧‧Disparity grating structure

62a‧‧‧ shading elements

62b‧‧‧Lighting element

63‧‧‧Transparent protective film

70‧‧‧ lens elements

71‧‧‧ lenticular lens

72‧‧‧ cylindrical lens round surface

100‧‧‧Volume-to-volume production methods

101‧‧‧Out (Unwind)

102‧‧‧Processing mode (Process)

103‧‧‧ involvement

110‧‧‧Processing of UV light hardening transfer

111‧‧‧Lens processing roller

111a‧‧‧ Groove structure of lens lenticular lens

111c‧‧‧ center point of lens cylindrical lens groove

111d‧‧‧Rotary axis of lens processing roller

112, 113, 135‧‧‧Transport roller

115‧‧‧ Coating components

116‧‧‧Liquid ultraviolet resin

116'‧‧‧Liquid UV resin film

117‧‧‧Ultraviolet light source generating components

118‧‧‧UV light

130‧‧‧ Processing of letterpress printing

131‧‧‧Grating processing wheel

132‧‧‧Ink roller

133‧‧‧black ink, black UV ink

131a‧‧ ‧ embossed structure for shading elements

131b‧‧‧ recessed structure for light-transmitting components

131c‧‧‧The center point of the concave structure for the light-transmitting element

131d‧‧‧Rotary axis of the grating processing roller

N‧‧‧ total number of views

, ‧‧‧shading element horizontal width

B, B'‧‧‧Lighting element horizontal width

Θ‧‧‧ tilt angle

L _B ‧‧‧ installation distance

P _B ‧‧‧The width of the parallax barrier unit structure

n _L ‧‧‧ lens optical refractive index

n _S ‧‧‧Soft transparent substrate optical refractive index

lens focal distance f _L ‧‧‧

f ' ‧‧‧Optical focal length of super stereoscopic separation element

P _L ‧‧‧The width of the lenticular lens

r‧‧‧The radius of the circular surface of the cylindrical lens

XYZ‧‧‧ coordinate system

FIG. 1 is a schematic diagram showing the structure of a conventional ultra-stereoscopic three-dimensional image display device.

FIG. 2 is a schematic view showing the structure of a conventional vertical strip parallax barrier structure.

FIG. 3 is a schematic view showing the structure of a conventional oblique strip parallax barrier.

Figure 4 is a schematic view showing the structure of a conventional vertical strip lens structure.

Fig. 5 is a schematic view showing the structure of a conventional inclined strip lens structure.

Fig. 6 is a schematic view showing the configuration of the superstereoscopic view separating element of the present invention.

Fig. 7 is a schematic view showing the constitution of a production method of the superstereoscopic view separating element of the present invention.

Fig. 8 is a schematic view showing a first embodiment of the processing mode of the present invention.

Fig. 9 is a schematic view showing a second embodiment of the processing mode of the present invention.

FIG. 10 is a schematic diagram showing the correspondence between the lens processing roller structure, the grating processing roller structure, and the super stereoscopic separation element.

As shown in Fig. 6, it is a schematic diagram of the configuration of the superstereoscopic separation element of the present invention. The superstereoscopic view separating element 1 is composed of a lens element 10, a flexible transparent substrate 20, and a parallax barrier element 30 in order from top to bottom.

The lens element 10 is composed of a plurality of vertical strip-shaped lenticular lenses 11 , wherein the single lenticular lens 11 has a lens surface 12 and a focal length f _L (not shown). An optical refractive index n _L , and a unit structure width P _L . The lens surface 12 can be formed by a circular curved surface or a non-circular symmetrical curved surface.

The parallax barrier element 30 is composed of a plurality of light shielding elements 31 and a plurality of light transmitting elements 32. The light shielding elements 31 and the light transmissive elements 32 have the characteristics of a vertical strip structure, and have individual , the horizontal width of B, and by B to form a unit structure width P _B . The lens element 10 and the parallax barrier element 30 described above have an equivalent view separation function as defined by the equations (1) to (7).

The flexible transparent substrate 20 is composed of a flexible substrate having high transparency and has an optical refractive index n _S . The material of the material is polyethylene terephthalate (PET), polycarbonate (Polycarbonate, PC), and polymethylmethacrylate (PMMA). By changing the relationship between n _S and n _L , the optical focal length f ' of the final superstereoscopic separation element can be determined. For example: when n _S =n _L , f ' =f _L (8)

When n _S >n _L , f ' >f _L (9)

When n _S <n _L , f ' <f _L (10)

As shown in FIG. 7, it is a schematic diagram of the manufacturing method of the superstereoscopic view separating element of the present invention. The production method of the super-stereoscopic separation element mainly uses the roll-to-roll production method 100, and the lens element 10 and the parallax barrier element 30 can be processed by the ultraviolet light hardening transfer processing 110 and the relief transfer processing 130. Simultaneously installed in a soft On both sides of the transparent substrate 20, the purpose of mass production of the super-stereoscopic separation element is achieved.

The so-called Roll-to-Roll Manufacturing Process (R2R Process) 100 is a continuous production method that has existed for many years, with high efficiency and low cost, and mainly processes the processing of the film that can be wound. The splicable film is housed in a cylindrical roll, and is subjected to operations such as unwinding 101, processing 102, and rewind 103, and finally, the film is processed, and then the film is finished. It is housed in a cylindrical roll (Roll). In addition, for practical application, the finished film can be directly cut rather than being stored as a cylindrical roll.

In the present invention, the above R2R process is applied to produce the super-stereoscopic separation element, for the flexible film, for example, the PET film 20 is used, and for the processing mode, the UV-hardened transfer process 110 and the letterpress are used. The transfer processing 130 includes a lens element 10, a PET film 20, and a parallax barrier element 30. The lens element 10 and the parallax barrier element 30 are individually mounted on both sides of the PET film 20.

As shown in Fig. 8, it is a schematic diagram of the processing mode of the present invention. The processing mode 102 is mainly composed of a process 110 for UV-curing transfer and a process 130 for relief transfer.

The ultraviolet light-hardening transfer processing 110 includes a lens processing roller (Lens Roller) 111, a plurality of transfer rollers (Transfer Roller) 112, 113, a coating member 115, a liquid ultraviolet resin 116, An ultraviolet light source generates an element 117 and an ultraviolet light 118. First, the liquid ultraviolet resin 116 is first applied to one side of the PET film 20 (such as above) through the coating member 115 to form a liquid ultraviolet resin film 116'. After the embossing of the lens processing roller 111 and the exposure and curing of the ultraviolet light 118, the lens element 10 can be mounted on one surface of the PET film 20. The ultraviolet light 118 is provided by the ultraviolet light source generating element 117. In addition, the structure of the lens processing roller 111 is as shown in FIG.

In addition, the relief printing process 130 includes a raster processing roller 131, an ink roller 132, a black ink 133, and a transmission. Roller 135. The black ink 133 is first applied to the grating processing roller 131 through the ink roller 132, and then transferred by the grating processing roller 131, and the parallax barrier element 30 can be disposed on the other surface of the PET film 20. (as below). Wherein, the black ink 133 is an opaque black ink. When the ink 133 is composed of black ultraviolet ink, as shown in FIG. 9, the processing of the relief printing 130 needs to be increased by one. The ultraviolet light source generates element 137 to produce an ultraviolet light 138 that provides a cure for the black ultraviolet ink 133. In addition, the structure of the grating processing roller 131 is as shown in FIG.

As shown in FIG. 10, a schematic diagram of the correspondence between the lens processing roller structure, the grating processing roller structure and the super stereoscopic separation element is shown.

The structure of the lens processing roller 111 is composed of a plurality of lens cylindrical lens grooves 111a, wherein the single lens cylindrical lens groove 111a has a width of PL, and the groove surface is appropriately The mold release treatment allows the cured ultraviolet resin to be smoothly separated from the groove. In addition, for the groove structure 111a, the liquid ultraviolet resin film 116' is imprinted through the lens processing roller 111, and the liquid ultraviolet resin 116 can be filled in the groove structure 111a. The resin element 116 is formed by curing the resin 116 after the ultraviolet light 118 is cured.

The structure of the grating processing roller 131 is composed of a plurality of relief structures 131a of a printable light-shielding member (hereinafter referred to as a relief structure for a light-shielding member), wherein the single-shading member for the light-shielding member 131a has The width of the black ink 133 is adsorbed, and the ink 133 is transferred onto the PET film 20 to form the light shielding members 31. In addition, the recessed structure 131b (hereinafter referred to as a recessed structure for a light-transmitting element) between the adjacent light-shielding member relief structures 131a has a width B, and the light-transmitting elements 32 can be formed because the black ink 133 cannot be adsorbed. .

In addition, for the assembly of the R2R process machine (not shown), the lens processing roller 111 and the grating processing roller 131 need to be aligned with two high precisions to produce a high-performance super stereoscopic separation element. 1. One of the alignments (referred to as the alignment of the parallelism of the rotation axis) is such that the rotation axis 111d of the lens processing roller 111 is parallel to the rotation axis 131d of the grating processing roller 131; the other alignment is called the center of the structure. point In the alignment, the center point 111c of the lens lenticular lens groove 111a is aligned with the center point 131c of the light-transmitting element recessed structure 131b. The offset of the axial parallelism causes tilting of the lens element 10 and the strip structure of the parallax barrier element 30, eventually resulting in ghosting. The offset of the center point of the structure causes the offset of the center of the viewing point, which ultimately leads to inconvenience in viewing.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the equivalent changes and modifications made by the scope of the present invention should still be covered by the present invention. Within the scope. For example, the superstereoscopic view separating element disclosed in the present invention provides a basic structure, that is, the super stereoscopic view separating element is composed of a lens element, a soft transparent substrate, and a parallax barrier element. The lens element and the parallax barrier element are individually mounted on both sides of the flexible transparent substrate. Of course, a transparent protective film may be further disposed on the parallax barrier element to prevent the parallax barrier element from falling off. In addition, in the processing of the relief printing and the processing of the ultraviolet light-hardening transfer, the number of the conveying rollers used is only for explaining the effect of the disclosed production method, and is not the constitution of the actual machine. In addition, for the coating of the liquid ultraviolet resin, a doctor blade can also be used to control the thickness of the liquid ultraviolet resin coating. I would like to ask the reviewer to give a clear explanation and pray for it.

1‧‧‧Super stereoscopic separation element

10‧‧‧ lens elements

11‧‧‧Single cylindrical lens

12‧‧‧ lens surface

20‧‧‧Soft transparent substrate

30‧‧‧Disparity grating components

31‧‧‧ shading elements

32‧‧‧Lighting components

‧‧‧shading element horizontal width

B‧‧‧Lighting element horizontal width

P _B ‧‧‧The width of the parallax barrier unit structure

P _L ‧‧‧The width of the cylindrical lens unit structure

XYZ‧‧‧ coordinate system

Claims (10)

A super stereoscopic view separating element, which is composed of a lens element, a soft transparent substrate and a parallax barrier element, is used for displaying a multi-view 3D composite image, and the lens element is composed of a plurality of A vertical strip-shaped lenticular lens, wherein the single lenticular lens has a lens surface, a lens optical refractive index (n _L ), a lens focal length (f _L ), and a unit structure width ( P _L ), the lens surface may be composed of a circular curved surface or a non-circular symmetrical curved surface; the soft transparent substrate has an optical refractive index (n _S ) and an optical refractive index with the lens (n _L The optical focal length (f ' ) of the superstereoscopic separation element; the parallax barrier element is composed of a plurality of shading elements and a plurality of light transmissive elements, wherein the single shading element and the single a light transmissive element having a vertical strip structure and having an individual , B) the horizontal width, and by ( And B) forming a unit structure width (P _B ) on both sides of the flexible transparent substrate, sequentially performing an ultraviolet hardening transfer process and a relief transfer process, and the lens element and the parallax barrier are The component is simultaneously mounted on both sides of the flexible transparent substrate to mass-produce the super-stereoscopic separation element, and the processing of the relief printing utilizes a grating processing roller, an ink roller, an ultraviolet black ink, a transporting roller, an ultraviolet light source generating component, and a processing machine and material composed of an ultraviolet light, through which the ultraviolet black ink is first applied to the grating processing roller, and then the grating processing roller is After the transfer and the exposure to the ultraviolet light are cured, the parallax barrier element can be disposed on the other surface of the flexible transparent substrate film, wherein the ultraviolet light is generated by the ultraviolet light source generating element. The super stereoscopic separation element according to claim 1, wherein the lens element and the parallax barrier element have an equivalent view separation function and have the following relationship: f~L _B ; P _L =P _B ; The horizontal width of the shading element, B is the horizontal width of the light transmissive element, P _B is the parallax barrier element unit structure width, n is the number of views, and n ≧ 2, f is the focal length of the lenticular lens, P _L is the column The lens lens unit structure width, L _B is the parallax barrier element mounting distance, and the mounting distance is the focal length of the lenticular lens. The super stereoscopic separation element according to claim 1, wherein the soft transparent substrate comprises a polyethylene terephthalate, a polycarbonate, and a polymethyl methacrylate. Composition. The super stereoscopic separation element according to claim 1, wherein the ultraviolet light hardening transfer processing uses a lens processing roller, a plurality of transfer rollers, a coating component, and a liquid ultraviolet tree. An ester, an ultraviolet light source generating component, and a processing machine and material composed of an ultraviolet light. First, the liquid ultraviolet resin is first applied to one surface of the flexible transparent substrate film through the coating member. Forming a liquid ultraviolet resin film, and the liquid ultraviolet resin film is embossed by the lens processing roller and exposed to the ultraviolet light, and the lens element is disposed on the side of the soft transparent substrate film. Wherein the ultraviolet light is provided by the ultraviolet light source generating element. The super stereoscopic separation element according to the fourth aspect of the invention, wherein the lens processing roller is formed by a groove structure of a plurality of lens cylindrical lenses, wherein the single lens cylindrical lens groove Having a width of P _L , the groove surface is subjected to a suitable release treatment, so that the cured ultraviolet resin can be smoothly separated from the groove, and the groove structure is passed through the lens processing roller The embossing of the liquid ultraviolet resin film can be filled in the groove structure, and the liquid ultraviolet resin can be formed on the soft transparent substrate after being cured by the ultraviolet light. Lens element. The super stereoscopic separation element according to the first aspect of the invention, wherein the grating processing roller is formed by a plurality of shading elements of the shading element capable of printing the shading element, wherein the single shading element is Structure with The width of the ultraviolet ink is adsorbed, and the ultraviolet black ink is transferred onto the flexible transparent substrate film to form the light shielding elements, and the light transmissive elements between the adjacent relief structures are used. The recessed structure has a width of (B), and the light transmissive elements can be formed because the ultraviolet black ink cannot be adsorbed. A super stereoscopic separation element according to claim 5 or 6, wherein for the assembly of the lens processing roller and the grating processing roller, the alignment of the parallelism of the rotation axis and the center point of the structure are required. Position, wherein the axis of rotation refers to the lens processing roller and the axis of rotation of the grating processing roller, and the center point of the structure refers to the center point of the lens cylindrical lens groove, and the light transmitting component Use the center point of the recessed structure. The super-stereoscopic view separating element according to claim 2, wherein, for the structural width of the parallax barrier element, the shading elements are changed by maintaining the unit structure width P _B Horizontal width with the light transmissive elements B, the brightness of the parallax barrier element can be increased, and the condition of the horizontal width is changed as follows: And let B '> B and ;among them, The B ' is the horizontal width of the light-shielding element and the light-transmitting element after the change. The super-stereoscopic view separating element according to claim 2, wherein, for the structural width of the parallax barrier element, the shading elements are changed by maintaining the unit structure width P _B Horizontal width with the light transmissive elements , B, can reduce the ghost of the lens element, the condition of the horizontal width is changed, as follows: And let B '< B and ;among them, The B ' is the horizontal width of the light-shielding element and the light-transmitting element after the change. A super stereoscopic view separating element according to claim 1, wherein an optical focal length f ' of the superstereoscopic view separating element, a focal length f _L of the lens, a focal length f of the lenticular lens, the lens optical index n _L, the optical refractive index between the flexible transparent substrate n _S, the following relation: n _S = n _L when the time, f '= f; when n _S> n _L when, f'> f ; when n _S <n _L , f ' <f.