Abstract: A proximity controlled safety device for a video monitor that prevents accidental over exposure to electromagnetic radiation and optical brightness. A proximity sensor detects the presence of a person near the video monitor. A control device determines how close the person is to the video monitor and either disrupts the video signal being received by the video monitor or disrupts the power running the video monitor depending upon how close the person is standing to the video monitor.

Abstract: A foldable screen protector for use on a computer monitor of various kinds has a fixing frame, a foldable top cover, and foldable left and right plates, thereof the fixing frame is adapted and secured to the screen of different types of computer monitors even to that of a notebook computer to provide the screen with protections against reflection of sunlight and oversight of others from outside; and by use of protruded tracks intersecting across the surface of the foldable top cover to reduce the amount of friction and a torsion spring, the foldable top cover and the foldable left and right plates can be folded and unfolded easily. When not in use, the foldable top cover can be folded up and lodged to the fixing frame as a protector to the screen.

Abstract: A television receiver radiation exposure limiting apparatus including a power supply, a proximity sensor, a rf switch, and a housing wherein the apparatus may be located within a small housing emplaced on the television receiver. The preferred proximity sensor comprises a monostatic infrared type sensor and responds to the comparative infrared signature of a human referenced to the ambient background. The sensor generates an electrical output signal which either stimulates or terminates conduction of electric current in an rf relay or solid state switch whenever a human form is within a preset detection range. A system in which the sensor signal terminates current flow is preferred. The rf relay or solid state switch connects the incoming rf signals representing unprocessed video and audio information to the VHF/UHF input of the television receiver only when no human signature is detected by the proximity sensor.

Abstract: A filter screen including a mounting frame mounted on a monitor, a screen glass holder frame pivotally connected to the mounting frame, a conductive screen glass mounted between the front and back shells of the screen glass holder frame and covered over the screen of the monitor, and a radiation alarm and eliminator circuit mounted on the screen glass holder frame and connected to the hot and neutral slots of a power outlet socket by a two-blade plug permitting the radiation of the monitor to be guided by the conductive screen glass to grounding, and wherein the radiation alarm and eliminator circuit has an indicator lamp and a buzzer controlled by an option switch to flash or buzz when the two blades of the plug are not inserted into the hot and neutral slots of the power outlet socket correctly.

Abstract: An advanced video display terminal (VDT) screen shielding method and apparatus includes an electric resistance lower than or equal to 10.sup.5 .OMEGA.(R.ltoreq.10.sup.5 .OMEGA.), a transmittance between 1/3 to 2/3, a fiber diameter D.ltoreq.MIN(D.sub.1,D.sub.2). Wherein D.sub.1 =VD.times.25.4.times.0.8/RV.times.0.16 or D.sub.1 =VD.times.25.4.times.0.6/RH.times.0.16, D.sub.2 =VD.times.PA.sup.3 -QA.sup.2 +RA-S, P=1.342.+-.0.002, Q=2.032.+-.0.002, R=1.011.+-.0.002, S=0.116.+-.0.002 and the aperture is a circle, ellipse, polygon, square or other transfigure. A formed angle .ltoreq.45.degree. of the fabric is horizontally against cathode ray tube. This screen-shielding method could suitably reduce glare and reflected lights, eliminate electrostatic charges and low frequency radiation, and prevent Moires and/or Newton Rings. This screen-shielding apparatus includes a frame, the high conductive fabric and a suitable ground wire, and is installed in front of the surface of the CRT.

Abstract: Hook- and-loop-type tapes are selectively attached to a video display unit and to flexible elongated strips of magnetic material so that the strips of magnetic material may be removably mounted around the video display unit in orthogonally intersecting planes to absorb magnetic radiation from the source. Each strip of magnetic material has a grain orientation parallel to its longitudinal axis and may be formed from grain-oriented ferromagnetic material in the range from M3 to M7. A multiple-layer magnetic shielding material is provided by securing first and second layers of such grain-oriented ferromagnetic material together with the grain orientation of the first layer orthogonal to the grain orientation of the second layer. Each strip of magnetic material may also be formed from this multiple-layer magnetic shielding material.

Abstract: A CRT display unit provides for reduced electromagnetic radiation emission by encasing a video amplifier for amplifying image signals sent from a computer and a CRT device for displaying the amplified image signals within a chassis; coating conductive films on the external and internal surfaces of the funnel section of the CRT envelope; covering the circumference of the panel section with a metal rim band; fastening the envelope to the chassis via metal fixtures installed on the rim band; electrically connecting the conductive film coated on the external surface to the rim band by means of a first conductive member; and electrically connecting the space between the rim band on the panel section fastened to the chassis via metal fixtures and the chassis using a second conductive member.