Abstract: The invention relates to a device for operating a breathing apparatus with a touch-sensitive graphical display and just one other mechanical operating element, wherein the basic treatment can be started by pressing down the mechanical operating element, and additional adjustments are made using the touch-sensitive graphical display.

Abstract: A method for manipulation of image data for a display screen that can be operated in two operating modes, viz B1 for a free viewing mode and B2 for a restricted viewing mode, comprising: a) switching on the operating mode B2, b) monitoring the eye position of a viewer in a given angular range A, with a signal S being set if the eye position signifies that the viewer is looking at the screen, and being deleted if not looking at the screen, c) manipulating the image data with regard to image parameters, wherein the said manipulation i) is performed to the effect that the quality of the restricted viewing mode B2 is enhanced, ii) is dynamically implemented in a control unit of the display screen, and iii) is performed exclusively while the signal S remains set, and d) repeating steps b) and c) until operating mode B2 concluded.

Abstract: A method for checking an operating mode of a display screen switchable between a free-viewing operating mode B1 and a restricted-viewing operating mode B2, comprising: in operating mode B2, determining a brightness value H of a surface and/or edge of a transparent light guide; then, depending on the brightness value H: i) unchanged use of operating mode B2 if the brightness value lies within a range of specified Hg values; ii) switching off operating mode B2 if the brightness value lies within a range of specified Hs values; or iii) changed use of operating mode B2 if the brightness value lies within a range of specified Hm values, with the control unit exerting an influence on the image content perceptible on the display screen by reducing the latter's brightness and/or contrast, with the range Hm lying between the ranges Hs and Hg, and with the ranges bordering on each other.

Abstract: A method for manipulation of image data for a display screen that can be operated in two operating modes, viz B1 for a free viewing mode and B2 for a restricted viewing mode, comprising: a) switching on the operating mode B2, b) monitoring the eye position of a viewer in a given angular range A, with a signal S being set if the eye position signifies that the viewer is looking at the screen, and being deleted if not looking at the screen, c) manipulating the image data with regard to image parameters, wherein the said manipulation i) is performed to the effect that the quality of the restricted viewing mode B2 is enhanced, ii) is dynamically implemented in a control unit of the display screen, and iii) is performed exclusively while the signal S remains set, and d) repeating steps b) and c) until operating mode B2 concluded.

Abstract: A method for checking an operating mode of a display screen switchable between a free-viewing operating mode B1 and a restricted-viewing operating mode B2, comprising: in operating mode B2, determining a brightness value H of a surface and/or edge of a transparent light guide; then, depending on the brightness value H: i) unchanged use of operating mode B2 if the brightness value lies within a range of specified Hg values; ii) switching off operating mode B2 if the brightness value lies within a range of specified Hs values; or iii) changed use of operating mode B2 if the brightness value lies within a range of specified Hm values, with the control unit exerting an influence on the image content perceptible on the display screen by reducing the latter's brightness and/or contrast, with the range Hm lying between the ranges Hs and Hg, and with the ranges bordering on each other.

Abstract: A screen with a transmissive image generator with pixels which is operable in at least two operating modes, B1 for a free viewing mode and B2 for a restricted viewing mode, and with an illuminating apparatus comprising a backlight that has a planar extension and radiates light in a restricted angular range, a plate-shaped light guide arranged in front of the backlight and provided with outcoupling elements on one of the large surfaces and/or within its volume, the light guide being transparent to at least 70% of the light emitted by the backlight; and light sources arranged laterally at edges of the light guide. In mode B2, the backlight is switched on and the light sources are switched off, and in mode B1 at least the light sources are switched on. In interaction with the transmissive image generator the illuminating apparatus constitutes an advantageous screen permitting the operating modes.

Abstract: A screen with a transmissive image generator with pixels which is operable in at least two operating modes, B1 for a free viewing mode and B2 for a restricted viewing mode, and with an illuminating apparatus comprising a backlight that has a planar extension and radiates light in a restricted angular range, a plate-shaped light guide arranged in front of the backlight and provided with outcoupling elements on one of the large surfaces and/or within its volume, the light guide being transparent to at least 70% of the light emitted by the backlight; and light sources arranged laterally at edges of the light guide. In mode B2, the backlight is switched on and the light sources are switched off, and in mode B1 at least the light sources are switched on. In interaction with the transmissive image generator the illuminating apparatus constitutes an advantageous screen permitting the operating modes.

Abstract: A display screen operable on at least a partial area A in two operating modes, free-viewing mode B1, and restricted-viewing modeB2, with the residual display area of the screen outside the area A maintaining a free viewing mode; comprising a first backlight arranged below the residual display area; a second backlight arranged below the area A; a transmissive image generator in front of the backlights; a plate-shaped transparent light guide arranged between the image generator and the backlights that outcouples, through one of its large surfaces, light coupled in through one of its edges; light sources arranged laterally an edge of the light guide, wherein the light guide is transparent to at least 70% of the light emitted by the backlights, and wherein in the B1 mode, the light sources are switched on, and in the B2 mode, the backlights are on and the light sources are off.

Abstract: An illuminating apparatus for a screen operable in at least two operating modes, viz B1 for a free viewing mode and B2 for a restricted viewing mode. The illuminating apparatus comprising: a backlight with a planar extension radiating light in a restricted angular range; a plate-shaped light guide that is, in a viewing direction, arranged in front of the backlight and with outcoupling elements one of the large surfaces and/or within its volume. The light guide is transparent to at least 70% of the light emitted by the backlight and light sources are arranged laterally at the edges of the light guide. Various parameters are specified for the number of outcoupling elements per unit area and for their extension, and in operating mode B2, the backlight is switched on and the light sources are switched off. In operating mode B1 at least the light sources are switched on.

Abstract: A display screen operable on at least a partial area A in two operating modes, free-viewing mode B1, and restricted-viewing mode B2, with the residual display area of the screen outside the area A maintaining a free viewing mode; comprising a first backlight arranged below the residual display area; a second backlight arranged below the area A; a transmissive image generator in front of the backlights; a plate-shaped transparent light guide arranged between the image generator and the backlights that outcouples, through one of its large surfaces, light coupled in through one of its edges; light sources arranged laterally an edge of the light guide, wherein the light guide is transparent to at least 70% of the light emitted by the backlights, and wherein in the B1 mode, the light sources are switched on, and in the B2 mode, the backlights are on and the light sources are off.

Abstract: An illuminating apparatus for a screen operable in at least two operating modes, viz B1 for a free viewing mode and B2 for a restricted viewing mode. The illuminating apparatus comprising: a backlight with a planar extension radiating light in a restricted angular range; a plate-shaped light guide that is, in a viewing direction, arranged in front of the backlight and with outcoupling elements one of the large surfaces and/or within its volume. The light guide is transparent to at least 70% of the light emitted by the backlight and light sources are arranged laterally at the edges of the light guide. Various parameters are specified for the number of outcoupling elements per unit area and for their extension, and in operating mode B2, the backlight is switched on and the light sources are switched off. In operating mode B1 at least the light sources are switched on.

Abstract: A screen for operation in a free viewing mode or a restricted viewing mode, comprising: an image reproduction unit, a plate-shaped transparent light guide in front of the image reproduction unit and luminous means arranged on sides of the light guide. The image reproduction unit is arranged behind the light guide. In the free-viewing mode, the luminous means are switched off, with the result that the light which comes from the image reproduction unit and onto which image information is modulated passes through the light guide substantially without influence. The luminous means are switched on in the restricted-viewing mode. A light emission characteristic is generated either on the basis of scattering particles which are distributed spatially and/or in terms of the concentration in the light guide or on the basis of coupling elements arranged on at least one of the large surfaces of the light guide.

Abstract: A screen having a free-viewing mode and a restricted-viewing mode, comprising a backlight emitting light into an unrestricted angular range in the free-viewing mode, and into a restricted angular range in the restricted-viewing mode. A transmissive imager is in front of the backlight. Light sources are outside the display area of the imager, and a transparent plate-shaped light guide scattering particles distributed therein is in front of the imager. In the free-viewing mode, the light sources are off, so that light from the backlight passing the imager passes the light guide unaffected. In the restricted-viewing mode, the lights are on, so that light radiating into a restricted angular range and passing the imager is superimposed by light that is scattered into the viewing space due to irradiation of light from the light guide. Thereby, the visibility of an image on the imager is reduced outside the restricted angular range.

Abstract: A screen for operation in a free viewing mode or a restricted viewing mode, comprising: an image reproduction unit, a plate-shaped transparent light guide in front of the image reproduction unit and luminous means arranged on sides of the light guide. The image reproduction unit is arranged behind the light guide. In the free-viewing mode, the luminous means are switched off, with the result that the light which comes from the image reproduction unit and onto which image information is modulated passes through the light guide substantially without influence. The luminous means are switched on in the restricted-viewing mode. A light emission characteristic is generated either on the basis of scattering particles which are distributed spatially and/or in terms of the concentration in the light guide or on the basis of coupling elements arranged on at least one of the large surfaces of the light guide.

Abstract: A screen having a free-viewing mode and a restricted-viewing mode, comprising a backlight emitting light into an unrestricted angular range in the free-viewing mode, and into a restricted angular range in the restricted-viewing mode. A transmissive imager is in front of the backlight. Light sources are outside the display area of the imager, and a transparent plate-shaped light guide scattering particles distributed therein is in front of the imager. In the free-viewing mode, the light sources are off, so that light from the backlight passing the imager passes the light guide unaffected. In the restricted-viewing mode, the lights are on, so that light radiating into a restricted angular range and passing the imager is superimposed by light that is scattered into the viewing space due to irradiation of light from the light guide. Thereby, the visibility of an image on the imager is reduced outside the restricted angular range.

Abstract: A method for secure transmission and visualization of encrypted information. A first grid of first and second element types is applied to a first medium. The types differently modify a property of light through the medium. A key defined by element distribution is determined. A second grid with different light-modifying element types is applied to a second medium. A second-grid contoured area defines an information item. Second-grid elements are distributed such that a first-grid element of the second type corresponds to a second-grid element of the first type, a first-grid element of the first type corresponds to a second-grid element of the second type outside the area, and a first-grid element of the second type corresponds to a second-grid element of the second type, and a first-grid element of the first type corresponds to a second-grid element of the first type inside the area. Grid superimposition makes the information visible.

Abstract: A method for secure transmission and visualization of encrypted information. A first grid of first and second element types is applied to a first medium. The types differently modify a property of light through the medium. A key defined by element distribution is determined. A second grid with different light-modifying element types is applied to a second medium. A second-grid contoured area defines an information item. Second-grid elements are distributed such that a first-grid element of the second type corresponds to a second-grid element of the first type, a first-grid element of the first type corresponds to a second-grid element of the second type outside the area, and a first-grid element of the second type corresponds to a second-grid element of the second type, and a first-grid element of the first type corresponds to a second-grid element of the first type inside the area. Grid superimposition makes the information visible.

Abstract: A ceiling mounting device for a display screen having a positioning mechanism constructed such that it enables the display screen to be positioned in the opening in its home position such that the back side of the flat panel display is essentially flush with the ceiling and an operating position wherein the display screen hangs generally vertically from the ceiling. The invention includes a pivoting mechanism to rotate the display screen when in its operating position in order to allow the display screen to be viewed from any location in the room.

Abstract: ceiling mounting device for a display screen having a positioning mechanism constructed such that it enables the display screen to be positioned in the opening in its home position such that the back side of the flat panel display is essentially flush with the ceiling and an operating position wherein the display screen hangs generally vertically from the ceiling. The invention includes a pivoting mechanism to rotate the display screen when in its operating position in order to allow the display screen to be viewed from any location in the room.

Abstract: A screen having a free-viewing mode and a restricted-viewing mode, comprising a backlight emitting light into an unrestricted angular range in the free-viewing mode, and into a restricted angular range in the restricted-viewing mode. A transmissive imager is in front of the backlight. Light sources are outside the display area of the imager, and a transparent plate-shaped light guide scattering particles distributed therein is in front of the imager. In the free-viewing mode, the light sources are off, so that light from the backlight passing the imager passes the light guide unaffected. In the restricted-viewing mode, the lights are on, so that light radiating into a restricted angular range and passing the imager is superimposed by light that is scattered into the viewing space due to irradiation of light from the light guide. Thereby, the visibility of an image on the imager is reduced outside the restricted angular range.