Optical image functional membrane

A functional film and optical imaging technology, which is applied in optics, image communication, image reproducer using projection device, etc., can solve problems such as uneven brightness of subtitle screen, affect the quality of audience, and unclear image, so as to curb bright spots effect, high gain, uniform optical structure

Inactive Publication Date: 2005-07-20
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the refraction and reflection of the light in the rear projection equipment (generally one or more reflectors or lenses are added to the projection light path) part of the loss, and the rear projection screen itself absorbs part, resulting in the current rear projection screens generally have image defects. Important problems such as clarity and uneven brightness of the subtitle screen have affected the quality of viewing by the audience
Especially the biggest disadvantage of the general rear projection screen: the center brightness is high, and the sun effect appears in the center of the screen. At present, even the center brightness and edge brightness uniformity of the more advanced optical projection lens are about 25% different.
Among them, the spherical lens array screen is the most ideal microstructure screen. There are many types of design forms. Due to the complicated structure and difficult preparation, there is no product in China.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 95% polyvinyl alcohol is heated and dissolved in hot water and cooled to room temperature. Then sequentially add sodium dodecylsulfonate 1%, 100nm TiO 2 2% of nanoparticles, 1% of ammonium persulfate, and 1% of benzophenone are effectively stirred and heated to obtain uniformly dispersed thick liquid. Then apply to glass. Evaporate the solvent by vacuum drying, and vacuum dry at 60°C for 10 hours to obtain TiO 2 Ultrastructured polyvinyl alcohol films dispersed with nanoparticles. The resulting film was treated with UV light for 10 minutes to improve the optical and mechanical properties of the film. The MT830G front projector produced by NEC Corporation of Japan was used for rear projection imaging, and the CA-100CRT color analyzer was used for detection, showing good performance. Among them, the brightness is more than 1.5 times that of the same commercial rear projector, no color drift, the contrast ratio of light and dark is more than 150:1, the difference in br...

Embodiment 2

[0027]Polystyrene 65% was dissolved in chloroform / toluene, then 10nm iron oxide nanoparticles 10%, ammonium persulfate 1%, benzophenone 1%, phthalate 20%, azobisisobutyl Nitrile 3%, a homogeneously dispersed solution was obtained. The resulting solution was then sprayed onto a quartz plate. The solvent was evaporated by vacuum drying, and vacuum drying was performed at 40° C. for 10 hours to obtain a polystyrene film with ultrafine structure dispersed iron oxide nanoparticles. The resulting film was treated with UV light for 1 min to improve the optical and mechanical properties of the film. The MT830G front projector produced by NEC Corporation of Japan was used for rear projection imaging, and the CA-100CRT color analyzer was used for detection, showing good performance. Among them, the brightness is close to the same commercial rear projectors, with slight color drift, the contrast ratio of light and dark is more than 100:1, the brightness difference between the center an...

Embodiment 3

[0029] Polyethylene 92% was dissolved in toluene / THF, then 200nm Al was added sequentially 2 o 3 1% of nanoparticles, 1% of benzophenone, 5% of phthalate, 1% of azobisisobutyronitrile, and 1% of sodium dodecylsulfonate to obtain a homogeneously dispersed solution. The resulting solutions were then sprayed directly onto plastic films, respectively. Naturally dry and evaporate the solvent to obtain Al 2 o 3 Ultrastructured polyethylene films dispersed with nanoparticles. The resulting film was treated with UV light for 0.5 min to improve the optical and mechanical properties of the film, showing good performance.

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Abstract

This invention discloses a kind of light imaging function membrane. Calculated in weight percents, it comprises of the following materials and dosage. The main body material 65 to 98 percent; nanometer particulate 1 to 20 percent; assistant solvent 1 to 30 percent. The mentioned nanometer particulate are dispersed in the main body material, forming the membrane with super micro ball structure from 1 to 10 micron. This invention that the light imaging function membrane uses the large quantity of micron balls as the micro lens array to change the light way or focalize to make images. Therefore the optical structure of the light imaging function membrane is well-proportioned, and the light energy using ratio is high. The images are vivid, which efficiently keep the bright spot effect, the color demitint phenomena and the color moving phenomena within limits. It has high resolving ratio and images with high plus, wide visual angle, high luminance, and high contrast, that won't be effected by the surrounding light. So it can be applied in the new-style projecting display screen of front and back projecting.

Description

technical field [0001] The invention relates to a photoimaging functional film, which belongs to the technical field of imaging and display. Background technique [0002] At present, common large-screen video display devices have the following several types: large-screen TV sets, TV curtain walls, LED electronic display screens, plasma display devices (PDP) and projection TV sets. However, large-screen TVs, TV curtain walls, LED electronic display screens, plasma display devices (PDPs) and other manufacturing processes are complex and costly, and in addition to bulky and heavy, it is more and more difficult to develop in large-screen video displays. The structure of the projection TV is the lightest, the most convenient to use, and the price is low, so it has become the fastest-growing and most widely used device in the large-screen video display devices with a diagonal size of more than 50 inches. The projection screen is an important part of the projection TV, and its qua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/56H04N5/74H04N9/31
Inventor 姚建年陈朝晖
Owner INST OF CHEM CHINESE ACAD OF SCI
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