TW591246B - Optical film with high contrast - Google Patents

Abstract

Optical systems and methods are disclosed that display information. Optical systems and methods include a light source and an optical film, where the optical film has low reflectance, controlled viewing angle, low glare and/or relatively high optical transmittance for diffuse incident light. Instrument cluster is disclosed that includes such an optical film. The optical film may include display graphics. The optical film may have higher optical transmittance for diffuse incident light than for collimated incident light.

Description

(4) (4) 591,246 optically transmissive particles are partially embedded in the optical absorption layer. ~ 々 It is said that a part of these particles remains exposed to the viewing position. From a) A: A part of the light incident on the substrate by the nine sources will be transmitted through the substrate and the particles toward the viewing position. In another conception of the present invention, an optical film includes an optical transmission substrate, an optical absorption layer, a plurality of particles, and a plurality of display patterns = the optical absorption layer is applied to the substrate. The particles are partially put into the optical absorption layer, so that a part of the particles remains exposed. The display graphics are applied to the substrate and / or the particles. The optical film transmits the light received from the substrate side through the particles toward the viewing position. The drawings are briefly explained. Considering the following detailed combination of the following embodiments combined with the accompanying drawings, the following will explain the present invention more completely: Figure 1 shows the invention according to the present invention. 1 is a schematic view of an optical system; FIG. 2 shows a specific embodiment of the present invention using a collimated incident yoke 耵 耵 线 line; FIG. 3 shows a specific implementation of the present invention using a diffuse incident 氺 蝻 ... 氺 蝻 线 9 line Fig. 4 shows the concept of light cone angle and viewing angle; Fig. 5 shows a schematic view of the optical system according to the present invention; A magnified partial view of an optical film, a case of a poor limb; Figure 6B shows the optical transmission ratio of the optical step shown in Figure 6A, and the optical transmission of the film ^ L is especially directed to the incident light; -9-

591246 100A enters the optical film and transmits the optical film. This transmitted light will exit the optical film 100 toward the viewing position 150 through the output surface 100B. The ray 103 represents the ambient light which is presented on the viewer side of the optical film 100 and incident on an output surface 1003 of the optical film. According to a special embodiment of the present invention, one of the optical transmission ratios of the diffused incident light rays of the optical film 100 is higher than those directed to the incident incident light rays, wherein the incident incident light rays originate from the light source. Furthermore, the optical film i has an overall optical absorption of more than 50% for the diffused light incident on the output surface 100B from the viewing side. In some examples, the overall optical absorption can exceed 60%. In yet other examples' the total optical absorption may exceed 70%. In addition, in a special embodiment of the present invention, the angle of transmitted light of the optical film 100 to diffuse incident light originating from the light source 101 is smaller than the cone angle of the incident light. The film 00 is combined with a structure that establishes an imaging plane, and the imaging plane is disposed on the output surface 100B and serves as an anti-glare structure. In other words, the structure provides a diffusive surface 400B to reduce or eliminate the need for additional anti-glare treatment of the surface 400B. As a result, the optical film has a higher optical transmission ratio than one directed to the incident light, and is combined with an output surface 400B having an extremely low specular reflection ratio. The specular reflectance of the optical film 100 is typically less than 2%. In some examples, the specular reflection ratio is less than 1%. In &-other examples, the specular reflection ratio is less than 0.05%. The light originating from the light source 101 and incident on the input surface 100A of the optical film 100 may be collimated or diffused. This will be explained more fully later. --11 ·

591246 Figure 2 shows the overall optical transmittance of an optical film 200 to a collimated incident ray. The optical film 200 having an input surface 200A and an output surface 200B is positioned between a light source 201 and a viewing position 250. The rays 2002 are substantially parallel to each other, and constitute a collimated light ray array derived from the light source 2001 and are incident on the input surface 2000a of the optical film 200. An incident ray 202A is at an incident angle α with the axis 210, and the axis 21O is orthogonal to the input surface 200A. As shown in FIG. 2, the ray 202 has a non-zero incident angle. Generally, the incident angle of the ray 202 can be assumed to be any value from JO degrees to +90 degrees. The ray 202 is transmitted from the optical film 200 and exits the optical film through the output surface 200β, and is directed toward the viewing position 250. The overall optical transmittance of the optical film 200 to a collimated incident ray is calculated by dividing the total optical power exiting the optical film 200 by the total optical power incident on the optical film and originating from the light source 200. Calculated. Fig. 3 is a diagram showing the overall optical transmittance of an optical film 300 to a diffuse incident light. An optical film 300 having an input surface 300A and an output surface 300B is positioned between a light source 301 and a viewing position 350. The ray 302 forms a diffused ray ray array originating from the light source 301 and is incident on the input surface 300A of the optical film 300. An incident ray 302A is cold with an incident angle between the axis 310, and the axis 310 is orthogonal to the input surface 300A. Generally, for a diffuse incident light, different rays have different angles of incidence. The angle of incidence of a given incident ray 302A can assume any value from -90 degrees to +90 degrees. The ray 302 is emitted from the optical film 300 through the output surface 300B and exits the optical film toward the viewing position 350. The overall optical transmittance of the optical film 300 to a diffuse incident ray is the total of the optical film 300 exiting the optical film 300 by exiting -12-

591246. The substrate 510 has an input surface 510a and an output surface 5108. The input surface 5108 faces the light source 501. The exposed surface of the particles 530 faces the viewing position 55 °, and any ambient light 504 that may appear. A particular embodiment of the present invention as shown in FIG. 5 displays the light received from the light source 501 to a viewing position 550 with a high contrast, reduced glare, and usually a controlled viewing angle. An optical film which has been used in the past as one of the rear projection screens in a rear projection display and whose structure is similar to that of the optical film 500 of FIG. 5 has been discussed in the past. An example is disclosed in U.S. Patent No. 5,563,738. When used as a rear-side projection screen, the optical film 500 is placed between a light source and a viewing position, so that the exposed surface of the particles 530 will face the light source, and at the same time the substrate will face The viewing position. In this structure, the incident light from the light source must be approximately collimated to optimize the overall optical transmittance of the projection screen. On the contrary, according to a specific embodiment of the present invention, the light source is located on the substrate side of the optical film and the exposed particles face the viewing position. In this structure, the incident light from the light source is preferably diffused to maximize the overall optical transmittance of the optical film. When used as a projection screen, as disclosed in U.S. Patent No. 5,563,738, the particle system in a thin film is used as a focusing lens, which needs to collimate the incident light 'in order to efficiently focus and transmit the incident light. The overall optical transmittance of the projection screen disclosed in U.S. Patent No. 5,563,738 is generally reduced as the incident light becomes more diffuse. In contrast, in one embodiment of the present invention, the particles 530 of the 'optical film 500' partially collimate the incident light. In this specific embodiment of the present invention, the collimation of diffused incident light is more efficient, and the overall optical transmittance of the optical film is generally when the incident light, the 14- (10) line becomes more diffuse. Increase. The optical film 500 according to a specific embodiment of the present invention transmits diffused light incident from a light source with high efficiency, absorbs most of the ambient light, and has a very low specular reflection ratio viewed from the side of the viewer. High contrast displays information to viewing position 55. The advantage of using a film in the configuration of Figure 5 is that it is easier to design and manufacture a light source with a diffused light output than a collimated light output. Furthermore, diffusing a collimated light is usually easier than collimating a diffuse light source. This is especially true when the light source is an extended light source rather than a point light source. Typically, additional optical components such as optical lenses are used to collimate the output of a diffused light source. For example, a Fresne lens is used in a rear projection display to collimate the output light from the light source. One of the above-mentioned specific embodiments of the present invention has a significant advantage in that the overall optical transmission ratio of the optical film is increased when the incident light becomes more diffuse. Therefore, the optical film is particularly suitable for use with a diffusion light source including a diffusion extended light source. Referring back to FIG. 5, the optical absorption layer 520 is disposed on the output surface 5 10B of the substrate 51. The particles 530 are partially embedded in the optical absorption layer 52. The particles 530 are expected to be in close proximity or in optical contact with the surface 510B to increase the total optical transmittance of the optical film 500. The optical absorption layer 52o surrounding the particle 53o defines an effective entrance aperture 531 in a region close to the output surface 510B, and the aperture is used for the light received by the particle from the light source 501. The ray 502 incident from the light source 501 to the input surface 510A and having an incident angle α with the direction orthogonal to the surface 510A is refracted at the interface 510A and transmits the particles 53 and the optical layer 540. This transmitted ray will exit the optical film 500 and become a ray 503 at an angle of / 3 from the normal direction. The exit angle is mainly determined by the refractive index of the particles, the refractive index of the particles '53 ° (Π), and the refractive index of the substrate 510. Due to the collimation of the particles 53 °, the angle occupancy is usually smaller than the angle α. Therefore, for a diffused light incident on the film 500 and originating from the light source 501, the angle of view of the transmitted light is [], which is half the cone angle of the incident light of the incident light. Moreover, the total optical transmittance of the optical film pair ′ and incident incident light is greater than that which is directed toward the incident incident light. 6A, FIG. 6B, and FIG. 6 (: for further explanation. Referring to FIG. 6A, an optical film 600 similar to the optical film of FIG. 5 is positioned between a light source 601 and a viewing position 65. The light is incident from the light source 601 to the optical film and exits the optical film and faces the viewing position 65. The optical film 600 includes a substrate 610, an optical absorption layer 62, and a plurality of particles 63. The selective optical layer 54 in FIG. 5 is not included in FIGS. 6α to 6 in order to facilitate the development of the moon without detracting from its universality. The substrate 61 has an input surface and an output surface 610B. The input surface 61〇A is a surface It faces the light source 60.1. The exposed surface of the particle 630 faces the viewing position 650. The optical absorption layer 620 surrounding the particle 630 defines an effective entrance aperture 631 in the area close to the output surface 61〇B And the aperture is used for the light received by the particle from the light source 601. The exposed surface of the particle 630 forms an exit aperture 632 that is usually larger than the entrance aperture 631. The entrance aperture 631 will partially determine the The light received by the light source 601 is transmitted through the particles 630. Figure 6B shows the overall optical transmittance of the optical film 600 to a collimated incident light. The ray 633 constitutes an array collimation derived from the light source 601 and incident on the output surface 610B. Straight rays. As can be understood from Figure ⑽, only incident rays such as rays 633B, etc., which penetrate into the entrance aperture 631, are more than 20%. In some applications, the overall optical transmission ratio is more than 3%. %. In still some other applications, the overall optical transmittance is more than 40%. In yet another application, the overall optical transmittance is more than 50%. Ray · 035 when leaving the light source 6 〇1 may be diffusive. Another option is to shoot. She may be collimated or less diffusive when the light source 601 is turned on, and becomes diffused or more diffused after passing through a light diffusing substrate 610. Diffuse. Another option is that an additional optical diffusing layer not shown in FIG. 6 can be placed between the substrate 61 and the light source 60 to 'diffuse the light from the light source 60 01. Spring back Referring to FIG. 5, the overall optical transmittance of the optical film 500 is when the incident light becomes more diffuse In addition, for a diffused light incident on the optical film 500 and originating from the optical film 501, the angle of view of the transmitted light is generally less than half the cone angle of the incident light. Therefore, for a diffuse light source or For a specular light source combined with a diffusing substrate 510 or a specular light source combined with an optical diffuser not shown in FIG. 5, the optical film 500 displays a high optical flux at a narrow viewing angle The narrow viewing angle characteristic of the optical film 500 is particularly useful when designing an instrument cluster for a ship, an aircraft, a motor vehicle, or the like. In the case of a motor vehicle, one of the instrument clusters is known · The angle of view of the monitor is usually quite large. As a result, the light from the display can reach the front windshield and side windows and can be reflected to the driver or other passengers, causing glare. In order to reduce the viewing angle, the instrument cluster is usually recessed in a housing, which causes the footprint of the instrument panel of the motor vehicle to increase. Integrating the optical film 500 into an instrument group can reduce the viewing angle of the display used in the instrument. It is therefore not necessary or necessary to recess the display in a housing. The optical absorbing layer 520 is designed to absorb the incident incident to the optical film 500. · -18- (14) 591246

A large part of the ambient light on the user's side. Referring to FIG. 5, an ambient ray 504 enters the optical layer 54 from the viewer's side, and passes through the particles 53 to enter the light: absorbing layer 520, and the ambient ray can be substantially absorbed at the optical absorbing layer. The optical film 500 absorbs a large part of the ambient light, so even if there is a lot of ambient light, the information can be displayed to the viewing position 550 with high contrast. For example, a motor vehicle instrument cluster that incorporates an optical film 5 大 absorbs large #trauma ring brother light, so even if there is a large amount of ambient light, information can still be displayed to, for example, a driver by asking and comparing. The optical absorption of the optical film 500 for the light incident from the viewing side is partially determined by the absorption coefficient and thickness of the optical absorption layer 52. The optical absorption coefficient of the optical absorption layer may be in a range of 0.01 to 1 micron. More preferably, the optical absorption coefficient is in the range of 0.1 to 5 micrometers. Still more preferably, the optical absorption coefficient is in the range of 0.3 to 1 micron. The thickness of the optical absorption layer is determined in part by the average size of the particles 530 and the standard deviation of the size of the particles. The thickness of the optical absorption layer may be between 〇11 >

It is in the range of 0 · 9γ, and the average radius of ^ is the particle 530. In some examples, the thickness may be in the range of 31: to 71 <. In yet other examples, the thickness may be in the range of 0.4γ to 0.6r. Although multilayer particles may be used in some applications, it is desirable that the particles be shaped as a single layer with a high packing density to optimize the total transmittance of the optical film of 500. One of the special excellent characteristics of the optical film 500 is that the surface of the particles 53 will form a matte surface on the output side of the optical film facing the viewer. In other words, the particles 530 transmit the diffused incident light to the viewing position 550 with a high flow rate and a high contrast ratio, and at the same time, the particles 530 will form a matte surface -19-591246. The matte surface reduces or eliminates glare (i.e., has-a very small specular reflection ratio). According to a specific embodiment of the present invention, the matte surface treatment of the output surface of the optical film will reduce or eliminate the need to perform an additional anti-glare treatment on the optical film. In applications where the imaging plane (that is, the plane on which the image is displayed) and the particles 530 are close or overlapping each other, the matte surface on the output side of the optical film will cause only a small or no loss of resolution. The reduction in glare that can be achieved by the exposed surface of particles 530 is mainly based on the size and distribution of particle size. In general, smaller particles are more effective at reducing glare or specular reflection ratio. The specular reflection ratio of the optical film 500 viewed from the side of the viewer is typically less than 2%. In some examples, the specular reflection ratio is less than 1%. In yet other examples, the specular reflection ratio is less than 0.05 /. The extremely low specular reflectance of the optical film 500 will make the optical film very suitable for display applications in which glare is extremely undesirable. The optical film 500 is particularly suitable for displays for outdoor use, or displays in applications where extremely bright ambient light may cause large and extremely undesirable glare. For example, a motor vehicle instrument cluster incorporating an optical film 500 can significantly reduce or eliminate glare with little or even no additional anti-glare treatment. Furthermore, when the particles 530 form the imaging plane or are close to the imaging plane, no loss or only a small amount of resolution will be lost. Without the optical layer 540, the diffuse reflection ratio of the optical film 5 viewed from the side of the viewer is typically less than 10%. In some examples, the diffuse reflection ratio is less than 8%. In yet other examples, the diffuse reflection ratio is less than. The optical layer 540 is preferably a highly light-transmitting layer, and the layer is preferably applied to the exposed area of the particles 530 and the optical absorption layer 520 in conformity with the shape and is intended to be improved -20- 591246

(16) The overall performance of the optical film 500. The optical layer 540 may be hard-coated to increase the longevity of the optical film 500. The optical layer 540 may be an anti-reflection coating layer to increase the total optical flux of the optical film 500 and at the same time reduce the total reflection ratio of the optical film 500 viewed by the viewer. In this case, the diffuse reflectance of the optical film 500 viewed from the side of the viewer is typically less than 8%. In some examples, the diffuse reflectance is less than 4%. In yet other examples, the diffuse reflection ratio is less than 2%. The optical layer 540 may also have an optical diffusing property to further control the viewing angle of light exiting from the optical film. The optical layer 540 may also include a colorant. In general, the high specular and diffuse reflectance viewed from the side of the viewer will reduce the contrast of a display. An optical film 500 according to a specific embodiment of the present invention will absorb a large portion of the ambient light to have a low overall (ie, mirror surface plus diffuse) reflectance 'and combine a matte surface on its output side To have a low specular reflectance. The optical film 500 according to this embodiment of the present invention will have a low specular reflection ratio to display information with a high contrast. The substrate 510 preferably has high optical transmission. The substrate can be clear, transparent or diffuse. The substrate itself can diffuse light by volume and / or surface diffusion. Surface diffusion can be achieved by making the surface 510A matte. The substrate 51 may be soft or hard, and may have a colorant to optimize the color of the light rays exiting the optical film 500 and toward the viewer 550. The substrate 510 may be any suitable material that transmits light generally. Examples of materials that are particularly suitable as a substrate include polyethylene terephthalate (PET), polycarbonate, acrylic, glass, and other similar substrate materials. The optical absorption layer 520 typically includes one of the light rays interspersed in an adhesive. -21. (17) 591246 Absorptive material composition. Particularly suitable light absorbing materials include carbon tobacco powder, light absorbing dyes such as black dyes and other similar optical absorbing dyes, and other similar light absorbing materials. Examples of particularly suitable adhesives include thermoplastics, radiation- or heat-curable acrylates, resins, silicone-based materials, pressure-sensitive adhesives, and other similar adhesive materials. Other materials such as dispersants, surfactants, viscosity modifiers, hardeners, and the like are also included.

The particles 530 may be made of any suitable material that is transparent and has a high degree of light transmission. Examples of particularly suitable materials include various glasses, including polymethacryl μ I / day (PMMA), polystyrene, two or more different material mixtures, and other sigma-bearing materials, and other similar particulate materials. The particles are preferably

… Kai 7 Ren may have other suitable shapes including oval or other desired shapes. -The elliptical particles 530 can be used to adjust the angle of view of the light exiting the optical film 500 in one or more directions, such as horizontal and vertical directions or other directions. The diameter range of the particles 530 and the thickness of the optical absorption can be better selected so that most of the particles can be partially embedded in the optical absorption layer 520 'to optimize the optical throughput while maintaining high contrast. As it increases, the information displayed to the viewer will look more granular / lower resolution. On the other hand, if the diameter of the particles 530 is too large: the particle it: ratio can be maintained, the optical flux of the optical film can be provided at a viewing angle of $ 1 ^, which can provide, for example, a desired optical transmittance and / or between 13 and : A refractive index of optical properties is required. The particles 530 may have a refractive index ranging from the thick yield of ash, and preferably between h3 and 2.4. The optical absorption can be larger than the average particle radius to increase the durability of the optical film -22 -22-

591246 sex. Alternatively, the thickness may be smaller than the average particle radius to increase the overall optical transmittance of the optical film 500. The light source 501 may be a single light source or an array of individual light sources. Light source: 50 1 can be a point light source or an extended light source. The light originating from the light source 50 and incident on the particles 530 is preferably diffused to optimize the optical flow i of the optical film 500. The light source 501 can radiate light by a collimating or diffusing type. If the light source 501 is not sufficiently diffused, the substrate 51 can be made sufficiently radiated. Alternatively, an appropriate additional diffuser may be disposed between the light source 501 and the input surface 510A, and the light source 501 may or may not display an image. Examples of a light source that can display an image include liquid crystal displays, light emitting diode displays, plasma displays, organic light emitting displays, field emission displays, electroluminescent displays, and other suitable image forming displays. Examples of light sources that do not display an image include light bulbs, light emitting diodes, and other suitable light sources that do not display an image. If the right light source 501 displays an image, the angle of view of a displayed image is preferably large to optimize the optical flux of the optical film 500 and be between the imaging plane of the light source 501 and the particles 530. The distance is preferably small to maintain image quality and resolution. FIG. 7 is a schematic diagram showing another embodiment according to the present invention. A light >: ~ 900 series is positioned between a light source 901 and a viewing position 95. The light is incident on the optical assembly 900 from the light source 901, and exits from the optical assembly j toward the viewing position 95. Ambient light is incident from the viewer's side onto the optical _ ... into 900. The optical assembly 900 includes one or more display members 910, a substrate 910, an optical absorption layer 9200, a plurality of particles 930, and a selection of -23-591246.

(19) Optional optical layer 940. The substrate 910 has an input surface 910A and an output surface 9 10B. The particles 930 are partially embedded in the optical absorption layer 920 and are preferably close to the output surface 9100B of the substrate 910 to optimize the total optical flux of the optical assembly 900. According to FIG. 7, the display member 9 1 5 is positioned between the light source 90 1 and the substrate 9 1 0 input surface 9 10A. Alternatively, the display member 915 or an additional display member 915 may be positioned between the particle 930 and the viewing position 950. The display member 915 includes a selective display layer 905 and a plurality of display maps 幵 > 906. The display layer 905 has an input surface 905 A and an output surface 905B. The display pattern 906 is formed on the surface 905A and / or the surface 905B. Three display patterns are shown in FIG. 8, FIG. 9, and FIG. Fig. 8 is a schematic diagram showing the month'J side of one of the left arrow indicator 1011 and one right arrow indicator 1012 on the background 1013. FIG. 9 is a schematic front view of a plurality of letters and numbers Π21 and a plurality of indicators 1123 on the background 122. FIG. FIG. 10 is a schematic front view of a battery indicator 1231 that is not shown on the background 1232. The graphics shown in Figures 8, 9, and 10 can be part of a display on a motor vehicle, an aircraft, a ship's instrument cluster, or any other display using graphics. Referring back to FIG. 7, the display member 9115 can be laminated to the substrate 91 using an adhesive such as a pressure-sensitive adhesive. Alternatively, the display member * 915 may be bonded to the substrate 910 by a mechanical device, sonic welding, or other appropriate devices. Alternatively, a display pattern may be formed on the input surface 910A of the substrate gw. Alternatively, a display pattern may be formed on the surface of the particles 93 °. The monitor pattern can be formed by methods such as printing, photolithography, or other appropriate methods thereof. These display graphics can be characterized as clear, transparent, colored, transparent, or opaque. The indicator layer 905 may be soft or hard. The display layer 905 may be generally any suitable material that radiates light. Examples of suitable materials include polyethylene, poly (ethylene) ester (PET), polymer Carbonate, acrylic, glass, and other suitable substrate materials.

The optical layer 940 is preferably a highly light-transmitting layer, which is preferably applied on the exposed area of the particles 930 and the optical absorption layer 920 in an outward shape and is intended to improve the overall performance of the optical film 900. The optical layer 940 may be a hard coating to increase the durability of the optical film 900. The optical layer 94 may be an anti-reflection coating layer to increase the total optical flux of the optical film 900 and at the same time reduce the total reflectance of the optical film 900 which is wound by the viewer side. The optical layer 940 may also have optical > emissive properties to further control the viewing angle of light exiting the optical film. The optical layer 940 may also include a colorant.

The optical assembly 900 further includes a rotatable pointer 925. The pointer 925 may be part of an instrument cluster such as a tachometer, a fuel gauge, or any other gauge or meter that uses a pointer. The pointer 925 includes a pointer arm 926 that is rotatable about a pivot 927. The pointer 925 is usually positioned between the light source 901 and the viewing position 950. According to FIG. 9, the pointer 925 is positioned between the light source 901 and the display member 915. Alternatively, the pointer 925 can be positioned on the viewer side of the optical assembly 900, between the particles 93 and the viewing position 95. In this case, the optical assembly 900 is between the pointer and the viewing position. An optical transmission layer is also included to protect the pointer from damage. The pointer 925 may be clear and transparent, or transparent, or opaque. The pointer 925 can be made by the light source 901 to -25-(21) 591246

An external light source illuminates. An example is disclosed in U.S. Patent No. 4,959,759. It can be understood that the optical assembly 900 displays information and graphics to a viewing position 95 with high contrast, low glare, and usually with a reduced viewing angle. As far as possible, the present invention has been described with reference to specific embodiments. However, these specific embodiments should not be limited. It is intended to completely cover the invention as defined by the scope of the accompanying patent application.

Description of the symbols of the diagrams Optical film 100, 200, 300, 400, 500 ^ 600 100a, 200a, 300a, 400a, 610a, 905a, input surface (input surface) 910a Wheel output surface (output surface) Light source

100b '200b, 300b, 510b, 610b, 905b, 910b 101, 201, 301, 401, 501, 501, 601, 901 103, 202, 302, 402a, Ray 402b, 502, 503, 633, 633a, 633b, 633c, 635 150, 250, 350, 450, viewing position 550, 650, 950 202a '302a incident ray 210 > 310 axis-26- 591246 (22) 400b diffuse surface (output surface) 400c point 402 ray (incident ray) 403 ray (Transmitted ray) 504 Ambient light (Ambient ray) 510, 610, 910 Substrate 510a Input surface (interface) Input surface 520 > 620 > 920 Optical absorption layer 530, 630 > 930 Particles 53b 631 (effective) entrance hole 540, 940 (optional) optical layer 632 exit aperture 634 636 900 optical assembly 905 (optional) display layer 906 display graphic 915 display member 925 (rotatable) pointer 926 pointer arm 927 pivot 1011 left Arrow indicator 1012 Right arrow indicator 1013, 1122, 1232 Background

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Claims (1)

591246 Patent Application No. 091123826 Chinese application for replacement of the patent application scope (January 1993) Pick up and application patent scope 1 · An optical system for displaying information, the optical system includes: a light source; and an optical film having An input side and a viewing side facing the light source, wherein the optical film is a total optical transmittance ratio of diffuse incident light that is incident from the light source onto the input side of the optical film and exits from the viewing side of the optical film Greater than those aimed at direct incident light. 2. The optical system according to item 1 of the scope of patent application, wherein the light incident on the optical film and originating from the light source is transmitted through the optical film to have a viewing angle, and the viewing angle is smaller than the light cone angle of the incident light Half. 3. The optical system according to item 1 of the patent application scope, wherein the angles of view of the light rays exiting from the viewing side of the optical film and originating from the light source are different from each other in the horizontal and vertical directions. 4. The optical system according to item 1 of the patent application range, wherein the total optical transmittance of the optical film to diffuse incident light from the light source is between 20% and 1000/0. 5. The optical system as claimed in item 1 of the patent claim, wherein the overall optical transmittance of the optical film to diffuse incident light from the light source is between 40% and 1000 /. . 6. The optical system according to item 1 of the patent application range, wherein an overall optical reflection ratio of the optical film to collimated light incident on the viewing side of the optical film is between 0% and 100/0. 7. The optical system according to item 1 of the scope of patent application, wherein the overall optical reflection ratio of the optical film to collimated light incident on the viewing side of the optical film 591246 is between 0% and 5%. 8. The optical system according to item 1 of the patent application range, wherein the light incident on the input side of the optical film and originating from the light source is diffuse. 9. The optical system according to item 1 of the patent application range, wherein the light incident on the input side of the optical film and originating from the light source is collimated. 1 0. An optical system for displaying tribute to a viewer, the optical system includes: a light source; and an optical film having an input side facing the light source and an input side opposite to the input side The output side, and the optical film is disposed between the light source and the viewer, the optical film includes: an optical absorption layer, and a plurality of transparent particles, partially embedded in the optical absorption layer, the particles are embedded The part is located on the input side of the optical film, so that a part of the light received from the light source through the input side of the optical film is transmitted through the particles toward the viewer. 11. The optical system of claim 10, wherein the light source is diffuse. 12. The optical system of claim 10, wherein the light source is collimated. 1 3. The optical system as stated in the scope of the patent claim, wherein the light incident on the optical film and originating from the light source is diffuse. 14 ″: The optical system under the scope of patent application No. 10, wherein the light incident on the optical film and originating from the light source is collimated. 15 · As stated in the optical system of item i 专利 in patent I 巳, in which the light shows a shadow silly. '-2-591246 Application ^ 彳 Scope Performance Page, <, \ 心, 4 4 < > ,,,, 16. The optical system according to item 15 of the patent application, wherein the light source includes a liquid crystal display. 17. The optical system of claim 15 wherein the light source includes a light emitting display. 18. The optical system of claim 15 wherein the light source comprises an organic light emitting display. 19. The optical system of claim 15 wherein the light source comprises a plasma display. 20. The optical system according to item 10 of the patent application scope, further comprising an optical transmission substrate disposed on the input side of the optical film and interposed between the optical absorption layer and the light source. 2 1. The optical system of claim 20, wherein the substrate has a colorant. 22. The optical system of claim 20, wherein the substrate includes an optical diffuser. 23. The optical system according to claim 20, wherein the optical absorption layer is coated on the optical transmission substrate. 24. The optical system of claim 10, wherein the optical absorption layer includes a light absorbing dye or pigment in a binder. 25. The optical system according to item 10 of the patent application, wherein the particles are approximately spherical. 26. The optical system of claim 10, wherein the particles have an asymmetric profile. 27. If you apply for the optical system of item 10 of the patent scope, in which the particles have the 591246 application, please dole range continued 28. 29. 30. 31. 32. 33. 34. 35. 36. Color. For example, the optical system of the scope of patent application, wherein the particles have a refractive index in the range of 1.3 to 3.5. For example, the optical system of the scope of patent application No. 10, wherein the particles partially protrude through the optical absorption layer. For example, the optical system according to item 29 of the patent application scope further includes an optical transmission substrate disposed on the input side of the optical film and interposed between the optical absorption layer and the light source. For example, the optical system of item 10 of the patent scope of W, wherein the particles include particles of 10 or more types, each of which has a different refractive index. The optical system of claim 10, which further includes a light transmitting layer disposed on at least one of an exposed surface of the particles and a surface of the optical absorption layer on the output side of the optical film . For example, the optical system of claim 32, wherein the light transmitting layer includes a hard coating. For example, the optical system of claim 32, wherein the light transmitting layer includes an anti-reflection layer. For example, the optical system of claim 32, wherein the light transmitting layer includes a matte surface treatment. For example, the optical system of claim 10, wherein the light incident on the optical B instead of the light source and transmitted from the light source is transmitted through the optical film and at an angle of view smaller than half the light cone angle of the incident light. The exit leaves the exit side of the optical pinion. -4- Apply for a patent Fan Yuan Ji Buy 3 7. If the optical system of item 10 of the patent application scope, wherein a light angle exiting from the output side of the optical film and originating from the light source is horizontal and vertical Different from each other. 38 · An optical system for displaying information to a viewer, the optical system comprising: a light source; and an optical film adapted to be disposed between the light source and the viewer, the optical film comprising: a substrate Having an input side and an output side for receiving light from the light source, an optical absorption layer having an input side and an output side, and the optical absorption layer is disposed on the output side of the substrate, the optical The input side of the absorption layer is facing the output side of the substrate, and a plurality of particles, allowing light to be transmitted and partially embedded in the optical absorption layer, and one of the particles on the output side of the optical absorption layer is "Side exposure" wherein a portion of the light incident from the light source to the input side of the substrate is viewed by the viewer through the particles transmitted through the optical film. 39. The optical system according to item 38 of the patent application scope, which further includes a display layer having an input surface and an output surface, and at least one of an input surface and a wheel-out surface provided on the display layer. A plurality of display graphics' The display graphics are adapted to be arranged between the light source and the viewer. 40. The optical system according to item 39 of the patent application scope, wherein the display layer is an annual profit application page: optically transparent. For example, the optical system of claim 39, wherein the display layer has a thickness between 10 and 500 microns. The optical system according to item (1) of the patent application, wherein one of the display layer and the display patterns is provided on the substrate. • If the optical system of the 39th scope of the patent application, one of the display layer and the display graphics such as 5H-is provided on the particles-at least one of the exposed portion and the optical suction layer on. For example, the optical system of item 39 of the patent application scope, wherein the display layer and. One of the two, such as the graphic display, is laminated to the substrate. • If the optical system of item 39 of the patent application is applied, one of the display layer and one of the display patterns is laminated to at least one of t of the particle exposed portion and the optical absorption layer. . Declaring the optical system of item 39 of the patent, one of the display layer and the other 4 display device graphics is discontinuous. For example, the optical system of item 39 of the patent application, the display patterns of these displays are translucent in a predetermined area. If so, please specialize in the optical system of the outer item, in which the display patterns are transparent in a given area. For example, the optical system of item 39 in the patent # 15, wherein the display graphics are colored in a predetermined area. For example, the optical system of item 39 of the patent scope, wherein the display patterns are opaque in a predetermined area. ^ For example, the optical system and system of item 39 of the patent scope, in which the scope of the interest in these displays is continued, page 52. 53. 54. 55. 56. 57. 58. 59. 60. 61. 62. The shape includes at least one of the letters, numbers, images, and marks, etc. The optical system of item 38 includes a plurality of display graphics adapted to be located between the source and the viewer. 2: The optical system specifically for item 52, wherein the display images ’′ and P are brushed on at least one of the exposed portions of the particles and at least one of the optical and laminated layers. / The optical system of item 52 of the Shenyue special area, wherein the display patterns are printed on at least one of the input side and the output side of the substrate. / 'If the optical system under the scope of patent application No. 52, wherein the display patterns are translucent in a predetermined area. For example, the optical system under the scope of patent application No. 52, wherein the display patterns are transparent in a predetermined area. The optical system of the 52th item of Shenyue's patent scope, in which the display patterns are colored in a predetermined area. For example, the optical system under the scope of patent application No. 52, wherein the display patterns are opaque in a predetermined area. For example, the optical system of claim 52, wherein the display graphics include at least one of letters and numbers, images, and marks. For example, the optical system of claim 38, wherein the optical absorption layer includes a light absorbing dye or pigment in a binder. For example, the optical system of the 38th patent application range, wherein the particles partially protrude from the optical absorption layer and enter the substrate. For example, if you apply for the optical system of item 38 in the patent scope, the particles are approximately spherical in the form of the application page of this cover. 63. The optical system of claim 38, wherein the particles have an asymmetric profile. 64. The optical system as set forth in Claim 38, wherein the substrate has a colorant. 65. The optical system of claim 38, wherein the particles have a refractive index in the range of 1.3 to 3.5. 66. The optical system according to item 38 of the patent application scope, further comprising a light transmitting layer provided on at least one of the exposed portion of the particles and the optical absorption layer. 67. The optical system of claim 66, wherein the light transmitting layer includes a hard coating. 68. The optical system of claim 66, wherein the light transmitting layer includes an anti-reflection layer. 69. The optical system of claim 66, wherein the light transmitting layer includes a matte surface treatment. 70. The optical system according to item 38 of the patent application, further comprising a rotatable pointer adapted to be disposed between the light source and the viewing position. 7 1. The optical system according to item 70 of the application, wherein the pointer is disposed between the light source and the input side of the substrate. 72. The optical system of claim 70, wherein the pointer is adapted to be disposed between the particles and the viewer. 73. The optical system of claim 70, wherein the pointer can guide light. 591246 t: Scope of Continuation < 74. 75. 76. 77. 78. 79. 80. For example, the optical system of claim 70 of the patent scope, wherein the pointer is translucent. For example, the optical system of the 70th patent scope, wherein the pointer is illuminated by a light source other than the light source. A method for displaying an image to a viewer. The method includes: providing an optically transmissive substrate having an input side and an output side, and an optical absorption layer is disposed on the output side of the substrate, and the optical absorption The layer has a plurality of particles that transmit light and are embedded in the optical port and the receiving layer, so that a part of the particles located on one side of the substrate of the optical σ and receiving layer are exposed; and An input side of the substrate is illuminated by a light source, so that a part of the light is transmitted through the substrate and then the particles toward the viewer. For example, the method of claim 76 of the patent scope further includes the step of disposing a light-transmitting layer on at least one of the exposed portion of the particles and the optical absorption layer. The light-transmitting layer includes a hard At least one of a coating and an anti-reflection layer. For example, the method of claim 76 of the scope of patent application further includes the step of arranging a plurality of display patterns between the light source and the viewer. For example, the method according to item 78 of the patent application further includes the step of disposing a light transmitting layer on the display patterns. An instrument cluster for displaying information to a viewer's position to view the instrument cluster, the instrument cluster includes: a soil plate /, an input side for receiving light from a light source, and -9- , An output side facing the viewing position; the photon and the receiving layer have an input side and an output side, and the optical absorption layer is disposed on the substrate, and the input side of the optical port and receiving layer is Facing the output side of the substrate; and a plurality of particles / grains, which can transmit light and be partially embedded in the optical absorption layer to expose a part of the particles to the viewing position, wherein the side substrate A portion of the light received by the input side from the light source will be transmitted through the particle and towards the viewing position. The instrument panel of the patent claim No. 80, which further includes a plurality of display graphics arranged between the light source and the viewing position. Female application: The instrument cluster of item 8 i of the patent offense also includes a light transmitting layer provided on the display graphics. Such as the scope of patent application, the particle exposure part and the optical absorption, such as the scope of patent application, the scope of patent application, such as the scope of patent application. The instrument cluster further includes a light transmitting layer disposed on the receiving layers. Instrument cluster, wherein the light source is diffuse. The instrument group, in which the light source is an instrument group for displaying the 80th reading range of the G.T., the instrument group, in which the light incident on the input side of the optical absorption layer and originated from the former and the original diffusion. The Go τ patent patent covers the 80th, "Xiao m Mao," and the Ai instrument cluster, which also includes a square pointer that is set between the light source and the pro-looking position. For example, the instrument group of the scope of the patent application No. 80 3 ^ .3 sr ^ ^, wherein the particles have a refractive index within the range of .3 to 3.5 yoke. A prior learning film for a display system, the optical film includes: a patent-pending cover sheet: v, X life * ^ a substrate having an input side for receiving light from a light source, and an output An optical absorption layer having an input side and an output side disposed on the output side of the substrate, the input side of the optical absorption layer facing the output side of the substrate; a plurality of particles that can transmit light and Partially embedded in the optical absorption layer, so that a part of the particles is exposed to a viewing position; and a plurality of display patterns are provided on at least one of at least one of the substrate and the particles A portion of the light received from the input side of the substrate will be transmitted through the particles toward the viewing position. 90. For example, the optical film under the scope of patent application 89, wherein the display graphics are printed on the particles. 7 91. For the optical film under the scope of patent application No. 89, the display patterns are printed on the substrate. 92. For example, the optical film under the scope of patent application 89, wherein the display patterns are laminated to the substrate. / 591246 Patent Application No. 091123826 Chinese Schematic Replacement Page (January 1993) ^ A ^ 350 300B .301 Volume A .450 403. Factory .400 402 _ Animal 4 Figure Wu Xuyin .401