CN105759442B - Laser display image speckle noise eliminator and display - Google Patents

Abstract

The invention provides a laser display image speckle noise eliminator and a display. The laser display image speckle noise eliminator is mainly composed of two or more materials with different refractive indices, and at least one of the two or more materials is in the form of fibers. , the gaps between the fibrous materials are filled with more than one other material; the diameter of the cross-section of the fibrous material, the length of a certain side or the length of the longest diagonal is greater than or equal to the wavelength of the laser irradiated thereon but less than 1mm ; The length of the fibrous material is greater than or equal to the wavelength of the laser irradiated on it; the cumulative height or cumulative width of the fibrous material is greater than or equal to the wavelength of the laser irradiated on it; the maximum refractive index n _max among two or more materials with different refractive indices The difference from the minimum refractive index n _min is: n _max ‑n _min ≥ 0.01; the distance between the same kind of fibrous materials is greater than or equal to the wavelength of the laser light irradiated thereon. The laser speckle remover of the invention has the advantages of no vibration, no energy consumption, small size and the like.

Description

Laser display image speckle noise eliminator and display

technical field

The invention relates to a laser display image speckle noise eliminator without vibration and energy consumption, and a laser liquid crystal display using the laser image speckle noise eliminator, belonging to the technical field of laser display.

Background technique

Laser display technology is a display technology that uses red, green, and blue (RGB) three-color lasers as light sources. It can most truly reproduce the rich and gorgeous colors of the objective world and provide more shocking expressiveness. From the perspective of chromaticity, the color gamut coverage rate of laser display can reach more than 90% of the color space that can be recognized by the human eye, which is more than twice the color gamut coverage rate of traditional display, completely breaking through the color gamut space of the previous three generations of display technology To achieve the most perfect color reproduction in the history of human beings, so that people can see the most real and most beautiful world through the display terminal.

However, when the laser is reflected or transmitted on the surface of the object, the human eye will observe a random distribution and a large number of dazzling spots in the light field of the object surface, which are called laser speckles. Laser speckle seriously affects the picture quality of the display and people's viewing experience. Therefore, how to eliminate laser speckle on the display screen is one of the most important technical problems in the field of laser display in recent years, which greatly limits the application of laser display. application.

At present, in order to solve the problem of laser speckle, several speckle elimination devices have been developed, but the effect is very little. A better laser speckle removal method is to change the laser phase by vibrating or rotating the device to eliminate the speckle on the display screen, such as vibrating the projection screen or adding vibration and rotating devices to the internal optical path of the projector.

However, these methods can only be applied to larger laser projection display devices, but are absolutely not applicable to flat-panel liquid crystal displays.

In order to enable flat-panel liquid crystal displays to achieve a large color gamut display effect, many companies have developed laser-excited phosphor technology, which can effectively reduce laser speckle, and products are currently on the market.

However, this technology still has the following problems:

1. The life of the display is short, because the phosphor is easily damaged by the high temperature generated by the laser. In order to prolong the life of the flat-panel liquid crystal display, it is necessary to reduce the laser intensity for exciting the phosphor, which further causes the brightness of the flat-panel liquid crystal display to be insufficient.

2. The fluorescence generated by the laser-excited phosphor powder is mixed with the excitation laser to form white light. The color gamut coverage of this white light is low, and it cannot meet the real large-color gamut display requirements.

Contents of the invention

In view of this, in order to solve the laser speckle noise on the screen caused by the use of laser as the illumination source in the display device, and solve the problems of the existing speckle elimination devices such as large volume, high price, short life, high power consumption, and inability to be installed on liquid crystal flat panel displays, etc. , The present invention provides a laser display image speckle noise eliminator and a display based on the speckle noise eliminator. The device is small in size, long in life and low in price, and is easy to be installed in a liquid crystal flat panel display.

Realize the technical scheme of the present invention as follows:

A laser display screen speckle noise eliminator, mainly composed of two or more materials with different refractive indices, at least one of the two or more materials is in the form of fibers, and the gaps between the fibrous materials are made of another or more materials Filling; the diameter of the cross-section of the fibrous material, the length of a certain side or the length of the longest diagonal is greater than or equal to the wavelength of the laser irradiated thereon but less than 1 mm; the length of the fibrous material is greater than or equal to the laser irradiated thereon The wavelength; the cumulative height or cumulative width of the fibrous material is greater than or equal to the wavelength of the laser irradiated on it; wherein, the difference between the maximum refractive index n _max and the minimum refractive index n _min in more than two materials with different refractive indices is: n _max -n _min ≥0.01; the distance between the same kind of fibrous materials is greater than or equal to the wavelength of the laser light irradiated thereon.

Further, in the present invention, a variety of materials with different refractive indices are arranged in an ordered array/winding, or in a random arrangement/stacking/winding to form a speckle canceller.

Further, the distance between the same kind of fibrous materials in the present invention is less than 10mm.

Further, the speckle remover of the present invention is mainly composed of two materials, the fibrous material is asbestos fiber, and the other material is a light-transmitting plastic film.

A laser display screen speckle noise eliminator, which is formed by setting a micropore or a capillary structure on a substrate, and the diameter of the cross section of the micropore or capillary structure, the length of a certain side or the length of the longest diagonal line is greater than or equal to the irradiation The wavelength of the laser on it is less than 1 mm; the length of the micropore or capillary structure is greater than or equal to the wavelength of the laser irradiated on it; the cumulative height or cumulative width of the micropore or capillary structure is greater than or equal to the wavelength of the laser irradiated on it; Among them, the difference between the refractive index n _max of the base material and the refractive index n _min of the filler in the micropore or capillary structure is: n _max -n _min ≥ 0.01; the distance between the micropore or capillary structure is greater than or equal to the wavelength of the laser.

Further, the substrate of the present invention is a glass plate, a light-transmitting plastic plate, a glass rod or a plastic rod.

Further, the spacing between micropores or capillary structures in the present invention is less than 10mm.

A laser display screen speckle noise eliminator, which is composed of fiber bundles or fiber clusters, the diameter of the cross-section of each fiber in the fiber bundle or fiber cluster, the length of a certain side or the length of the longest diagonal line is greater than or equal to The wavelength of the laser irradiated on it is less than 1 mm; the length of each fiber is greater than or equal to the wavelength of the laser irradiated on it; the cumulative height or cumulative width of the fiber bundle or fiber cluster is greater than or equal to the wavelength of the laser irradiated on it ; Among them, the difference between the refractive index n _max of the fiber bundle or fiber group and the refractive index n _min of the filling in the fiber is: n _max - n _min ≥ 0.01; the distance between adjacent fibers is greater than or equal to the wavelength of the laser irradiated on it .

Further, the cellulose in the present invention is acetate fiber bundle or glass fiber bundle, and the fiber cluster is PET fiber cluster.

Further, the distance between adjacent fibers in the present invention is less than 10 mm.

The working principle of the present invention is: when the laser beam is irradiated on the speckle elimination device (such as cellulose acetate bundle), when the laser passes through the speckle elimination device, due to "the refractive index difference between the fiber and the air between the fibers is very large", "the polarity of the fiber Thin lines and very small gaps between fibers" and "there are a large number of fibers and gaps between fibers in the fiber bundle", the laser will be in each fiber and the air gap between each fiber in the speckle remover Perform N (N≥1) times of total reflection and transmission to form a large optical path difference of the coherent laser light, thereby eliminating laser speckle noise on the display screen.

A laser liquid crystal display based on a speckle noise eliminator, mainly composed of a speckle eliminator, a laser source, a light concentrating/reflecting structure, a light guide plate, a reflective film, a uniform light film, a brightness enhancement film, and a liquid crystal imaging panel. At least one speckle eliminator is arranged on the optical path where the beam of the laser source exits.

Furthermore, the exterior of the speckle remover of the present invention is surrounded by a light-condensing/reflecting structure, and the laser beam is shot onto the speckle remover from the bottom of the light-condensing/reflecting structure.

Further, the present invention also includes an optical fiber, the laser beam emitted by the laser source is guided out of the optical fiber, and the speckle eliminater is located at the light exit of the optical fiber.

Further, the present invention also includes a reflective prism, and the laser beam emitted by the laser source is directed to the speckle remover through the reflective prism.

The working principle of the laser liquid crystal display of the present invention is: when the laser beam is irradiated on the speckle-eliminating device, when the laser beam passes through the fiber bundle or the fiber bundle-like structure, due to "the difference in the refractive index of the air between the fiber and the fiber is very large", "the polarity of the fiber The thin line and the tiny gap between the fibers" and "there are a large number of fibers and the gap between the fibers in the fiber bundle", the laser will eliminate each fiber and the air gap between each fiber Perform N (N≥1) times of total reflection and transmission to form a large optical path difference of the coherent laser light, thereby eliminating laser speckle noise on the display screen.

A projection display based on a speckle noise eliminator, mainly composed of a speckle eliminator, a laser source, a light-condensing/reflecting structure, a focusing lens group, an LCD imaging light valve, an imaging lens, and a projection screen; wherein the laser source At least one speckle eliminator is arranged on the optical path where the light beam exits.

Furthermore, the exterior of the speckle remover of the present invention is surrounded by a light-condensing/reflecting structure, and the laser beam is shot onto the speckle remover from the bottom of the light-condensing/reflecting structure.

Further, the present invention also includes an optical fiber, the laser beam emitted by the laser source is guided out of the optical fiber, and the speckle eliminater is located at the light exit of the optical fiber.

Further, the light concentrating/reflecting structure of the present invention is a reflective bowl.

Beneficial effect

First, the laser speckle remover of the present invention has the advantages of no vibration, no energy consumption, and small size.

Second, compared with the existing flat-panel liquid crystal display, the flat-panel liquid crystal display disclosed by the present invention has the advantages of the smallest volume, light weight, low price, convenient acquisition, easy installation, simple structure, and no vibration due to the use of laser speckle elimination devices. , No noise, no wear, long service life, fiber bundle devices are easy to be shaped, etc., and the most important thing is that the laser speckle noise in the picture is completely eliminated, which is conducive to the industrialization of laser display.

Third, compared with the existing projection display, the projection display disclosed in the present invention has the smallest volume, light weight, low price, convenient acquisition, easy installation, simple structure, no vibration, no Noise, no wear, long service life, fiber bundle devices are easy to be shaped, etc., and the most important thing is that the laser speckle noise in the picture is completely eliminated, which is conducive to the industrialization of laser display.

Description of drawings

Fig. 1 is the photo of the cross section of cellulose acetate bundle;

Figure 2 is a fiber cross-section with regular appearance;

Fig. 3 is a fiber bundle cross-section with irregular appearance;

Figure 4 is a laser liquid crystal display with a speckle remover using cellulose acetate bundles;

Fig. 5 shows that the speckle eliminater adopts a laser liquid crystal display with a microporous glass plate;

Fig. 6 adopts the laser liquid crystal display of the PMMA film that is mixed with asbestos fiber for the speckle eliminator;

Figure 7 is a laser liquid crystal display in which the speckle remover adopts a glass rod with a capillary structure;

Among them, 1 - speckle remover, 2 - laser source, 22 - optical fiber, 3 - light concentrating/reflecting structure, 31 - reflective prism, 33 - reflective bowl, 4 - light guide plate, 5 - reflective film, 6 - uniform light Film, 7-brightness enhancement film, 8-liquid crystal imaging panel, 9-focusing lens group LCD, 10-imaging light valve, 11 imaging lens, 12-projection screen.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings.

Example 1:

A laser display screen speckle noise eliminator, mainly composed of two or more materials with different refractive indices, at least one of the two or more materials is in the form of fibers, and the gaps between the fibrous materials are made of another or more materials Filled; fibrous is an independent, fine, hair-like substance (Figure 1); the diameter of the cross-section of the fibrous material, the length of a certain side, or the length of the longest diagonal is greater than or equal to the wavelength of the laser light shining on it And less than 1mm, the length of a certain side means that as long as one of the multiple sides of the cross section meets the condition; the length of the fibrous material is greater than or equal to the wavelength of the laser irradiated on it; the cumulative height or cumulative width of the fibrous material is greater than or equal to The wavelength of the laser light irradiated on it; the cross-sectional shape of the fibrous material can be a regular circle, square, triangle, ellipse or irregular shape (Figure 2, Figure 3); among two or more materials with different refractive indices The difference between the maximum refractive index n _max and the minimum refractive index n _min is: n _max -n _min ≥ 0.01; the distance between the same fiber materials in the speckle elimination device is greater than or equal to the wavelength of the laser irradiating it but less than 10mm; Materials with different refractive indices are arranged in an orderly array/wound or disorderly arranged/stacked/wound to form a speckle elimination device for a macroscopic device; the speckle elimination device of the present invention is used for a laser source 2 and an image modulation device 8 (such as a Liquid Crystal Display liquid crystal In the optical path between imaging devices, Digital Light Processing imaging devices, Liquid Crystalon Silicon imaging devices).

In this embodiment, the speckle remover is mainly composed of two materials, the fibrous material is asbestos fiber, and the other material is a light-transmitting plastic film.

Example 2:

A laser display image speckle noise eliminator, which is formed by setting a micropore or a capillary structure on a substrate, and the diameter of the cross section of the micropore or capillary structure, the length of a certain side or the length of the longest diagonal line is greater than or equal to the irradiation The wavelength of the laser on it is less than 1 mm; the length of the micropore or capillary structure is greater than or equal to the wavelength of the laser irradiated on it; the cumulative height or cumulative width of the micropore or capillary structure is greater than or equal to the wavelength of the laser irradiated on it; Among them, the difference between the refractive index n _max of the base material and the refractive index n _min of the filler in the micropore or capillary structure is: n _max -n _min ≥ 0.01; the distance between the micropore or capillary structure is greater than or equal to the irradiated The wavelength of the laser is less than 10mm.

In this embodiment, the substrate of the present invention is a glass plate, a transparent plastic plate, a glass rod or a plastic rod.

Light-transmitting plastics such as polypropylene, polyvinyl chloride, polystyrene, polymethyl methacrylate, methyl methacrylate, polyimide, polycarbonate are materials well known in the industry.

In this embodiment, the filler in the micropore or capillary structure is air or water.

Example 3:

A laser display screen speckle noise eliminator, which is composed of fiber bundles or fiber clusters, the diameter of the cross-section of each fiber in the fiber bundle or fiber cluster, the length of a certain side or the length of the longest diagonal line is greater than or equal to The wavelength of the laser irradiated on it is less than 1 mm; the length of each fiber is greater than or equal to the wavelength of the laser irradiated on it; the cumulative height or cumulative width of the fiber bundle or fiber cluster is greater than or equal to the wavelength of the laser irradiated on it ; Among them, the difference between the refractive index n _max of the fiber bundle or fiber group and the refractive index n _min of the filling in the fiber is: n _max - n _min ≥ 0.01; the distance between adjacent fibers is greater than or equal to the wavelength of the laser irradiated on it And less than 10mm.

The material of the fiber bundle in this embodiment can be acetate fiber, glass fiber, asbestos fiber, quartz fiber, silk, spider silk, regenerated cellulose fiber, adhesive fiber, cupro fiber, Lyocell (lyocell) fiber, Cellulose resin fiber, diacetate fiber, triacetate fiber, polyamide fiber, aramid fiber, polyester fiber, biodegradable polyester fiber, polyacrylonitrile fiber, modacrylic fiber, polyvinyl alcohol fiber , polyvinyl chloride-based fibers, polyolefin-based fibers, polyurethane elastic fibers, polyfluoroolefin-based fibers, diene-based elastic fibers, polyimide fibers; the fiber clusters are PET fiber clusters.

The fiber inner filler in this embodiment can be air or water and other substances.

For Examples 1-3, when the laser beam irradiates the speckle-dispelling device (such as cellulose acetate bundle), when the laser passes through the speckle-dissipating device, due to "the refractive index difference between the fiber and the air between the fibers is extremely large" and "the fiber is extremely fine, In the speckle remover 1, each fiber and the air gap between each fiber Perform N (N≥1) times of total reflection and transmission to form a large optical path difference of the coherent laser light, thereby eliminating laser speckle noise on the display screen.

The macro-devices of speckle-dissipating devices can be processed into regular-shaped plates, bundles, films, and rods, and can also be processed into irregular-shaped plates, bundles, films, and rods. For disorderly arrangement/stacking/entanglement of device materials, a disordered network structure will be formed, and the fibrous materials are contactable.

The speckle remover 1 of the present invention is used in the optical path between the laser source 2 and the image modulation device 8 (such as Liquid Crystal Display liquid crystal imaging device, Digital Light Processing imaging device, Liquid Crystalon Silicon imaging device).

Example 4:

As shown in Figure 4, a laser liquid crystal display based on a speckle noise eliminator mainly consists of a speckle eliminator 1, a laser source 2, a light concentrating/reflecting structure 3, a light guide plate 4, a reflective film 5, and a uniform light film 6. Brightness enhancement film 7 and liquid crystal imaging panel 8, characterized in that at least one speckle eliminator is arranged on the optical path where the light beam of the laser source emerges.

When the laser beam is irradiated to the speckle remover 1, when the laser beam passes through the fiber bundle or the fiber-like structure, due to "the refractive index difference between the fiber and the air between the fibers is very large", "the ultra-thin line of the fiber and the distance between the fibers Very small gaps" and "there are a large number of fibers and gaps between fibers in the fiber bundle", the laser will perform N(N≥1) on each fiber in the speckle remover 1 and the air gap between each fiber The secondary total reflection and transmission make the coherent laser form a large optical path difference, thereby eliminating the laser speckle noise on the display screen.

Example 5:

As shown in Figure 4, a laser liquid crystal display based on a speckle noise eliminator includes a speckle eliminator 1 using cellulose acetate bundles, a laser source 2 using RGB three-color semiconductor lasers, a light concentrating/reflecting structure 3, and a light guide Light plate 4, reflective film 5, uniform light film 6, brightness enhancement film 7, liquid crystal imaging panel 8;

The acetate fiber tow has a total fineness specification of generally 39,000 denier and 43,000 denier, the thickness of the fiber bundle is less than 1mm, and the fiber length direction is parallel to the optical axis of the laser beam.

The RGB three-primary-color semiconductor laser is used to output the laser beam, and the acetate fiber tow is placed at the light outlet 5mm of the RGB three-primary-color semiconductor laser, and the spot area of the laser beam output by it is smaller than that of the acetate fiber tow. area.

The exterior of the acetate fiber tow is surrounded by the light concentrating/reflecting structure 3, and the laser beam is shot onto the acetate fiber tow from the bottom of the light concentrating/reflecting structure 3.

The laser light reflected and transmitted by the acetate fiber tow enters the light guide plate 4 after being condensed/reflected by the light condensing/reflecting structure 3 .

The laser beam forms multiple transmissions and reflections in the light guide plate 4, reaches the reflective film 5, uniform light film 6, and brightness enhancement film 7, and finally exits from the liquid crystal imaging panel 8, forming a large color gamut laser display screen without screen speckles.

Embodiment 6:

As shown in Figure 5, a laser liquid crystal display based on a speckle noise eliminator mainly consists of a speckle eliminator 1 using a microporous glass plate, a laser source 2 using an RGB three-color laser, an optical fiber 22, and a light concentrator. / Reflective structure 3, light guide plate 4, reflective film 5, uniform light film 6, brightness enhancement film 7, liquid crystal imaging panel 8;

The microporous glass plate has a hole density of 1000 holes/square centimeter and a thickness of 0.5 mm. Three layers of microporous glass plates are used, and an air gap of 0.5 mm is left between the layers of the microporous glass plate.

The RGB three-primary-color laser is used to output laser beams, and the laser beams emitted by the RGB three-primary-color lasers are exported by an optical fiber 22 .

A microporous glass plate is placed 1 mm away from the light exit of the optical fiber 22, and the spot area of the output laser beam is smaller than that of the microporous glass plate.

The outside of the microporous glass plate is surrounded by the light concentrating/reflecting structure 3, and the laser beam is shot onto the microporous glass plate from the bottom of the light concentrating/reflecting structure 3.

The laser light reflected and transmitted by the microporous glass plate enters the light guide plate 4 after being condensed/reflected by the light condensing/reflecting structure 3 .

The laser beam forms multiple transmissions and reflections in the light guide plate 4, reaches the reflective film 5, uniform light film 6, and brightness enhancement film 7, and finally exits from the liquid crystal imaging panel 8, forming a large color gamut laser display screen without screen speckle.

Example 7:

As shown in Figure 6, a laser liquid crystal display based on a speckle noise eliminator mainly consists of a speckle eliminator 1 using a PMMA film doped with asbestos fibers, a laser source 2 using an RGB three-color laser, and light concentrating/reflecting Structure 3, reflective prism 31, light guide plate 4, reflective film 5, uniform light film 6, brightness enhancement film 7, and liquid crystal imaging panel 8.

The PMMA film mixed with asbestos fibers contains 40% of asbestos fibers.

The RGB three-primary-color laser is used to output laser beams, and the laser beams emitted by the RGB three-primary-color lasers are directed to the PMMA film of the asbestos fiber by the reflective prism 31 .

The PMMA film of asbestos fiber is arranged at the light exit of the reflective prism 31, and the spot area of the laser beam output by it is smaller than the area of the PMMA film of asbestos fiber.

The outside of the PMMA film of the asbestos fiber is surrounded by the light concentrating/reflecting structure 3, and the laser beam is shot onto the PMMA film of the asbestos fiber from the bottom of the light concentrating/reflecting structure 3.

The laser light reflected and transmitted by the PMMA film of the asbestos fiber enters the light guide plate 4 after being condensed/reflected by the light condensing/reflecting structure 3 .

The laser beam forms multiple transmissions and reflections in the light guide plate 4, reaches the reflective film 5, uniform light film 6, and brightness enhancement film 7, and finally exits from the liquid crystal imaging panel 8, forming a large color gamut laser display screen without screen speckles.

Example 8:

As shown in Figure 7, a projection display based on a speckle noise eliminator mainly consists of a speckle eliminator 1 using a glass rod with a capillary structure, a laser source 2 using an RGB three-color laser, an optical fiber bundle 22, a reflective Bowl 33, focusing lens group 9, LCD imaging light valve 10, imaging lens 11, projection screen 12;

The RGB three-primary-color laser is used to output laser beams, and the laser beams emitted by the RGB three-primary-color semiconductor lasers are exported by an optical fiber 22 .

A glass rod with a capillary structure is placed 1mm away from the light exit of the optical fiber 22, and the spot area of the output laser beam is smaller than the cross-sectional area of the glass rod with a capillary structure.

The outside of the glass rod with capillary structure is surrounded by reflective bowl 31, and the laser beam is shot onto the glass rod with capillary structure from the bottom of reflective bowl 31.

The laser light reflected and transmitted by the glass rod with capillary structure is collected/reflected by the reflective bowl 31 and then enters the focusing lens group 9 .

The laser beam is irradiated onto the LCD imaging light valve 10 through the focusing lens group 9 , passes through the imaging lens 11 , and is projected onto the projection screen 12 .

To sum up, the above are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (7)

1. a kind of laser display picture speckle noise arrester, which is characterized in that mainly by two or more refractive index different materials It constitutes, at least a kind of form of material is threadiness in two or more materials, and the gap between fibrous material is by another kind The above material filling；The diameter of the cross section of the fibrous material, a certain side length or longest catercorner length are greater than or equal to It irradiates the wavelength of laser thereon and is less than 1mm；The length of fibrous material is greater than or equal to the wavelength of the laser of irradiation thereon； The accumulation height or cumulative width of fibrous material are greater than or equal to the wavelength of the laser of irradiation thereon；Wherein, two or more foldings Penetrate largest refractive index n in rate different materials_maxWith minimum refractive index n_minDifference are as follows: n_max- n_min≥0.01；Same fiber shape material Spacing between material is greater than or equal to the wavelength of the laser of irradiation thereon.

2. laser display picture speckle noise arrester according to claim 1, which is characterized in that a variety of refractive index are different Material stacks/is wound speckle arrester according to oldered array/winding or disorderly arranged/.

3. laser display picture speckle noise arrester according to claim 1, which is characterized in that the same fiber shape material Spacing between material is less than 10mm.

4. laser display picture speckle noise arrester according to claim 1, which is characterized in that the speckle noise is eliminated Device is made of two kinds of materials, and the fibrous material is asbestos fibre, glass fibre or crystalline ceramics fiber, and another material is Light-passing plastic；Fibrous material is doped in light-passing plastic；Doping fibrous material light-passing plastic be made into film, lens, it is rodlike, It is blocky.

5. a kind of laser display picture speckle noise arrester, which is characterized in that the speckle noise arrester is mainly by fiber Beam or coma are constituted, and the diameter of the cross section of every fiber, a certain side length or longest are diagonal in the fibre bundle or coma Line length is greater than or equal to the wavelength of the laser of irradiation thereon and is less than 1mm；The length of the every fiber, which is greater than or equal to, shines Penetrate the wavelength of laser thereon；The accumulation height or cumulative width of fibre bundle or coma are greater than or equal to the laser of irradiation thereon Wavelength；Wherein, fibre bundle or coma refractive index n_maxWith fiber inner stuffing refractive index n_minDifference are as follows: n_max- n_min≥ 0.01；Spacing between adjacent fiber is greater than or equal to the wavelength of the laser of irradiation thereon.

6. laser display picture speckle noise arrester according to claim 5, which is characterized in that the fibre bundle is acetic acid Fiber, glass fibre, asbestos fibre, quartz fibre, silk, spider silk, regenerated celulose fibre, viscose fiber, copper ammonia fiber, Lyocell fibers, diacetate fiber, triacetate fiber, Fypro, aromatic polyamide fibre, gather cellulose ester fiber Ester fiber, biodegradable polyesters fiber, polyacrylonitrile fibre, modified acrylic fibre, vinal, polyvinyl chloride Series fiber, polyolefin series fiber, polyurethane elastomeric fiber, poly- fluoroolefins series fiber, elastodiene fibre or polyimides are fine Dimension, the coma are PET fiber group.

7. laser display picture speckle noise arrester according to claim 5, which is characterized in that between the adjacent fiber Spacing be less than 10mm.