Method of protection of movie - and - video products from screen copying

IPC classes for russian patent Method of protection of movie - and - video products from screen copying (RU 2365959):

H04N5/74 - Projection arrangements for image reproduction, e.g. using eidophor

G03B21 - Projectors or projection-type viewers; Accessories therefor (devices for changing pictures G03B0023000000; zoetropes G03B0025000000; photographic printing apparatus G03B0027000000; devices or systems producing a varying lighting effect F21S0010000000; optical projection comparators G01B0009080000; projection microscopes G02B0021360000)

Another patents in same IPC classes:

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Display system (options) / 2233003

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Feedback projection optical device / 2349946

Feedback projection device includes light source with set of red, green and dark blue light-emitting diodes, directional element, at least, one projection lens, spatial light modulator, light sensor with its output connected to the input of controller, spatial light modulator control module and light source control module. The modulator enables imaging in light beam thereafter projected. The light sensor control provides measuring red, green and dark blue levels in light beam reflected from the screen. The controller ensures control red, green and dark blue component level in light beam and transmits correcting light beam to the spatial light modulator control module and light source control module regarding beam colour component level measured by light sensor. The light sensor controls white and measures flare smoothness shined of the projector illuminated screen and represents the chamber with multiple-unit photodetector.

Device for formation of bright images on screen / 2347254

Projective optical system / 2344452

Projective optical system contains the first optical part, second optical part, third optical part and rejecting element, each aforesaid optical part being furnished with an appropriate set of optical elements. Note here that the aforesaid third optical part additionally incorporates at least one light source and is arranged to form a beam of light and to direct it to the said rejecting element designed to direct the beam of light generated by the third optical part onto the second optical part which contains image formation means and is designed to direct the beam of light onto the first optical part for it to project the said beam of light.

Scratch-safe rear projection screen and method for its manufacture / 2343521

Rear projection screen contains one light-diffusing polymethyl methacrylate layer, which includes polymethyl methacrylate matrix, and also spherical diffusing particles (A) and speherical particles (B). At that particles (A) have size from 0.1 to 40 micrometer with index of refraction, which differs from refraction index of polymethyl methacrylate matrix by value from 0.02 to 0.2. Particles (B) have size from 10 to 150 micrometer and refraction index, which differs from refraction index of polymethyl methacrylate matrix by value from 0 to 0.2. Total concentration of particles (A) and particles (B) makes from 1 to 60 wt % in equivalent to mass of light-diffusing polymethyl methacrylate layer. Concentration c_PA of particles (A), thickness d_S of light-diffusing polymethyl methacrylate layer, and also size D_PA of spherical diffusing particles (A) are selected so that ratio c_PA·d_S/D_PA ³ makes from 0.001 to 0.015% wt·mm/mcm³, concentration c_PB of particles (B), thickness d_s of light-diffusing polymethyl methacrylate layer, and also size D_PB of spherical particles (B) are selected so that ratio C_PB·d_S/D_PB ³ makes from 0.000005 to 0.002% wt·mm/mcm³ and ratio of average roughness R_Z of polymethyl methacrylate layer surface squared to size of spherical particles (B) cubed, R_z ²/D_PB ³, makes from 0.0002 to 0.1300 mcm^-1.

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System includes first optic part 1, second optic part 2, third optic part 3 and deviating element 4. Operating third optic part 3 shapes light beam from source 5 and directs it to deviating element 4, which directs light beam formed by third optic part 3 to second optic part 2. Light passes through second optical part 2 in one direction and is reflected from micromirror element 6, thus forming image structure, then passes second optic part 2 in reverse direction and reaches entry of first optic part 1 which projects light on screen. Entrance pupil surface of second optic part is positioned between first and second optic parts. Each optic part has optic axis, and optic axis of third optic part forms 0° to 90° angle with optic axis of second optic part, while optic axes of first and second optic parts are parallel and distanced from each other.

Projection optic system / 2339065

Device includes first optic part 1, second optic part 2, third optic part 3 and deviating element 4. During operation of projection system third optic part 3 shapes light beam from emission source 5 and directs it to deviating element 4, which directs light beam formed by third optic part 3 to second optic part 2. Light passes through second optical part 2 in one direction and is reflected from micromirror element 6, thus forming image structure, then passes second optic part 2 in reverse direction and reaches entry of first optic part 1 which projects light on screen. Entrance pupil surface of second optic part is positioned between first and second optic parts; each optic part has optic axis, and optic axis 9 of third optic part 3 forms 0° to 90° angle with optic axis 8 of second optic part 2, while optic axis 8 of second optic part 2 forms an angle with optic axis 7 of first optic part 1.

Projection optical system / 2338232

Projection system contains first optical part, second optical part and third optical part, each optical part contains at least one optical lens. Second optical part additionally contains imager, third optical part additionally contains at least one light source and deflecting element mounted between first and second optical parts, directing source light to second optical part and transmitting image light emitted from second optical part to first optical part displaying light beam. Deflecting element is designed as transparent prism with reflective coating on one of its sides.

Image projection screen / 2333520

Invention refers to image projection screen. The screen is provided with transparent carrier and light-diffusing layer covering projective surface specified within screen geometry. The light-diffusing layer is made as a very thin transparent coating film. The film is fixed on separate carrier, an air gap being provided between film and carrier. The gap is extended along the whole surface of film and carrier.

Light diode projector and method for presenting information on display / 2248025

Device has reflector, means for producing image and optical system for projecting image on display, as light source a board with light diodes is used, light flows of which are concentrated on an optical system. Protector is provided with sensor of outer light level and connected to common current adjuster.

FIELD: safety products.

SUBSTANCE: method of protection of movie - and - video products from screen copying consists in creating jamming countermeasures to illegal copying securing uneven lighting of the projection screen, invisible to the human eye, but perceived by video devices heat radiation during film show. Whereat special covering of the projection screen is used unevenly reflecting light energy of the film-projector in infrared frequencies range.

EFFECT: jamming countermeasures to illegal video shooting during film shows conducted by means of digital and traditional film projectors, securing minimal cost of the jamming method and elimination of any disturbances to the audience.

The invention relates to the protection of information and can be used when showing films in cinemas to prevent illegal copying by shooting on video, as well as for protection of various objects from the capture device that uses the photoelectric matrix.

Known organizational way to prevent the screen copy movies by prohibiting the taking of video equipment in auditoriums or by prohibiting the implementation of the video during the demonstration movies.

The disadvantages of this method are: the difficulty of detection video viewers in mind the small size of the cameras that use a digital method of recording video; disturbing the audience limitations; the difficulty of finding the implementation of the on-screen copy by reason of mandatory darkening of the auditorium during the performance; the difficulty of exposing persons exercising the screen up, without disturbing other viewers, as well as the risk of false accusations of spectators.

Known engineering method of preventing replay illegal screen copies household digital video players. This method is based on the introduction of special tags by modulating an audio track on ignalinos film. While domestic players equipped with an additional system to recognize a given modulation and stops playback.

The disadvantage of this method is the need of modernization domestic players digital video in the scale of world production. This will occur on the background of the inevitable loss of profits by companies of players, which will hold its first, due to falling sales of players, prohibiting illegal reproduction, in contrast to those that are not will be upgraded. In addition, the acoustic tag is much easier to be removed with the use of the computer, than a hindrance in the flow of the video.

Know of any other engineering method of protection. The American company Cinea is developing a system that will change the level of light illumination films during the demonstration in modern digital cinemas and this may interfere with shooting video.

The disadvantage of this method is that it can be used only if to show the film in digital form, using a special projector. Thus, to prevent illegal copying in this way, you need a serious re-equipment of cinemas, which would entail significant capital expenditures.

The closest t is nicesly essence and the achieved effect is another engineering method, described in the patent DE 102004023800 A1 from 2005.12.01. It is proposed to create an invisible obstacle during showings by irradiation of the projection screen, thermal radiation, using special infrared emitters.

The main disadvantage of this method is that the equipment required for implementing the method, are volatile and can be temporarily disabled in case of criminal conspiracy with the staff. In addition, special equipment increases the cost of implementing this method.

The technical problem of the invention is jamming illegal shooting video films during showings by both digital and traditional film projectors, with the minimum cost way of jamming, high reliability, and the exclusion of disturbing the audience.

The technical problem is achieved by using the proposed method, the protection film and video from screen up during the screening occurs uneven intense glare projection screen special design invisible light infrared frequency range. This camcorder takes this obstacle, putting her on the recorded image as a visible bright light, prichinami sensitivity of its semiconductor of photometric to thermal radiation, while to the human eye this radiation, and thus created an obstacle invisible.

The reliability of the method of protection is provided by using a special projection screen, which is easily controlled and eliminates the possibility of temporary removal of the protective effect, even if the criminal collusion with the staff of the cinema.

The technical result consists in the fact that when using the proposed method of protection film and video from screen copy precluded the possibility of obtaining illegal copies of satisfactory quality, both digital and film projectors, due to the presence in the recorded image distinct labels, marks or defects that are not connected logically with demonstrated cinema and clearly hindering the view obtained illegal copies. In addition, the possibility to temporarily disable equipment for removal of the protective effect.

The proposed method of protection film and video from screen copy can be implemented in three main ways:

the first way is to use a projection screen, on the working surface of which is in the process of production or upgrading unevenly (as signs) are covered with a reflective coating, have their major or minor reflectivity to the invisible light infrared frequency range. Thus, when the illumination of the screen light of the projector on its surface in the infrared light is formed in an uneven pattern, invisible to the viewers eye, but perceive recording equipment;

the second way along with greater cost is more efficient and is in the application of the projection screen special design on the surface of which in the production process applied quantum receivers of visible light frequency range and the light sources of the infrared spectrum. Data photodetectors and infrared light sources can be electrically connected directly to obtain static uneven illumination or through simple logic controllers power management light sources to obtain a dynamic picture of the glow of the screen in the infrared spectrum. Thus, when the illumination of the screen light projector photodetectors convert the energy of light of the projector in electrical and carry out food sources of infrared light, forming on its surface in the infrared light static or dynamic uneven picture, invisible to the viewers eye, but perceive recording equipment;

the third way combines the principles of the first and second paths and is to use the special is ocrite projection screen complex composition, solidification which, due to the pivotal action of nanotechnological elements included in its composition, is formed an electric circuit consisting of photoelectric receivers of light and sources of infrared radiation.

Thus, to achieve the protective effect of the projection screen surface must be illuminated with infrared radiation with sufficient intensity and irregularity in the complete absence of interference, lying in the field of light of the visible frequency range.

The proposed method of protection film and video from screen copy allows you to prevent obtaining illegal copies of movies and films of satisfactory quality when shooting them with projection screen during a demonstration in cinemas.

The method of protection film and video from screen copy, consisting of jamming illegal copying by providing the uneven lighting projection screen invisible to the human eye, but perceive video heat radiation during the screening, characterized in that it uses a special coating projection screen, irregularly reflecting light energy of the projector, in the infrared frequency range.