Display screen having a variable relative luminance distribution curve

A display screen comprising an image reproduction unit with a control unit and detector configured to detect a translation of the image reproduction unit relative to an initial position and/or a rotation of the image reproduction unit relative to an initial orientation and/or to detect an absolute position or relative position of the image reproduction unit with respect to a reference system, wherein the image reproduction unit changes, at least for a portion of its image surface, a relative luminance distribution curve for contents displayed thereon at least along a direction (R), which is selectable but fixedly oriented with respect to the image reproduction unit, when a translation path detected by the detector relative to the initial position is above a selectable threshold value and/or a detected angle of rotation relative to the initial orientation is above a respective selectable threshold value and/or an absolute position or relative position with respect to a reference system is outside a selectable tolerance;

• wherein the relative luminance distribution curve is narrow along a first direction (R) and wide along a second direction differing from the first direction (R), and wherein, after the aforementioned detection with a detected translation path and/or a detected angle of rotation above the respective selectable threshold value and/or an absolute position or relative position with respect to the reference system within the selectable tolerance, the relative luminance distribution curve is wide along both directions;
• and the display screen further comprising a switchable light filter located in front in a viewing direction of a viewer or in the image reproduction unit, which switchable light filter in turn comprises:
• a first optical element which:
• comprises a first layer, or a first layer and a plurality of further layers,
• wherein each layer comprises a material with a plurality of light-absorbing transition dipole moments,
• wherein every transition dipole moment is oriented, at least in a first state with a tolerance of a maximum of 10°, parallel to a first reference direction which is selectable for the first optical element or fluctuates around this first reference direction,
• such that light which is incident in the first optical element is transmitted or at least partially absorbed depending on its incident direction relative to the layers and its polarization state,
• wherein the transition dipole moments in each of the layers can be varied with respect to orientation and/or amount between the first state and at least one second state in order, alternately, to bring the respective layer into at least two different states,
• a polarization filter which is arranged upstream or downstream of the first optical element,
• a generator configured to selectively generate a first electric field or a second electric field, wherein, for the first optical element, the first state is generated by applying the first electric field and the second state is generated by applying the second electric field so that,
• in a first operating mode B1 in which the first electric field is applied and the transition dipole moments of the layers of the first optical element are oriented along the first reference direction, with a first sub-operating mode B1H and a second sub-operating mode B1V, on the one hand, at least 24% of unpolarized light which is incident in the switchable light filter parallel to the first reference direction is transmitted and, on the other hand, at least 85% of unpolarized light which is incident in the switchable light filter in an angle of greater than 30° with respect to the first reference direction is absorbed, wherein this absorption takes place exclusively along a first reference direction in the first sub-operating mode B1H and exclusively in a second reference direction perpendicular to the first reference direction in the second sub-operating mode B1V, and
• in a second operating mode B3 in which the second electric field is applied and the transition dipole moments of the layers of the first optical element are oriented parallel to a surface of the polarization filter and perpendicular to a transmission direction of the polarization filter, at least 24% of unpolarized light which is incident in the switchable light filter at any angle with respect to the first reference direction is transmitted.

A display screen comprising an image reproduction unit with a control unit and detector configured to detect a translation of the image reproduction unit relative to an initial position and/or a rotation of the image reproduction unit relative to an initial orientation and/or to detect an absolute position or relative position of the image reproduction unit with respect to a reference system, wherein the image reproduction unit changes, at least for a portion of its image surface, a relative luminance distribution curve for contents displayed thereon at least along a direction (R), which is selectable but fixedly oriented with respect to the image reproduction unit, when a translation path detected by the detector relative to the initial position is above a selectable threshold value and/or a detected angle of rotation relative to the initial orientation is above a respective selectable threshold value and/or an absolute position or relative position with respect to a reference system is outside a selectable tolerance;

• wherein the relative luminance distribution curve is narrow along a first direction (R) and along a second direction differing from the first direction (R), and wherein, after the aforementioned detection with a detected translation path and/or a detected angle of rotation above the respective selectable threshold value and/or an absolute position or relative position with respect to a reference system within the selectable tolerance, the relative luminance distribution curve is wide along the first direction (R) and along the second direction;
• and
• the display screen further comprising a switchable light filter located in front in a viewing direction of a viewer or in the image reproduction unit, which switchable light filter in turn comprises:
• a first optical element and a second optical element, wherein each of the two optical elements
• comprises a first layer, or a first layer and a plurality of further layers,
• wherein each layer comprises a material with a plurality of light-absorbing transition dipole moments,
• wherein every transition dipole moment is oriented, at least in a first state with a tolerance of a maximum of 10°, parallel to a first reference direction which is selectable for the first optical element and second reference direction which is selectable for the second optical element or fluctuates around the latter,
• such that light which is incident in the first optical element or second optical element is transmitted or at least partially absorbed depending on its incident direction relative to the layers and its polarization state,
• wherein the first reference direction and the second reference direction of the transition dipole moments differ from one another by less than 40°,
• a liquid crystal layer which is arranged between the first optical element and the second optical element and which, depending on a first electric field or second electric field acting upon the liquid crystal layer, influences the polarization state of light penetrating through it,
• generator configured to selectively generate the first electric field or the second electric field,
• optionally, a polarization filter which is arranged above or below a unit comprising one of the two optical elements, or no polarization filter, so that
• either, if the polarization filter is present, in a first operating mode B1 in which the first electric field is applied, with a first sub-operating mode B1H and a second sub-operating mode B1V, on the one hand, at least 24% of unpolarized light which is incident in the switchable light filter parallel to the first reference direction or second reference direction is transmitted and, on the other hand, at least 85% of unpolarized light which is incident in the switchable light filter in an angle of greater than 30° with respect to the corresponding reference direction is absorbed, wherein this absorption takes place exclusively along a first reference direction in the first sub-operating mode B1H and exclusively in a second reference direction perpendicular to the first reference direction in the second sub-operating mode B1V, wherein either the first reference direction or the second reference direction is perpendicular to a polarization direction of the polarization filter,
• or, if no polarization filter is present, in a first operating mode B1 in which the first electric field is applied, at least 24% of unpolarized light which is incident in the switchable light filter at any angle is transmitted,
• and, regardless of the presence of a polarization filter, in a second operating mode B2 in which the second electric field is applied, on the one hand, at least 24% of unpolarized light which is incident in the switchable light filter parallel to the first reference direction or to the second reference direction is transmitted and, on the other hand, at least 85% of unpolarized light which is incident in the switchable light filter in an angle of greater than 30° with respect to the corresponding reference direction is absorbed.

A display screen comprising an image reproduction unit with a control unit and detector configured to detect a translation of the image reproduction unit relative to an initial position and/or a rotation of the image reproduction unit relative to an initial orientation and/or to detect an absolute position or relative position of the image reproduction unit with respect to a reference system, wherein the image reproduction unit changes, at least for a portion of its image surface, a relative luminance distribution curve for contents displayed thereon at least along a direction (R), which is selectable but fixedly oriented with respect to the image reproduction unit, when a translation path detected by the detector relative to the initial position is above a selectable threshold value and/or a detected angle of rotation relative to the initial orientation is above a respective selectable threshold value and/or an absolute position or relative position with respect to a reference system is outside a selectable tolerance;

• wherein the relative luminance distribution curve is narrow along a first direction (R) and along a second direction differing from the first direction (R), and wherein, after the aforementioned detection with a detected translation path and/or a detected angle of rotation above the respective selectable threshold value and/or an absolute position or relative position with respect to a reference system within the selectable tolerance, the relative luminance distribution curve is wide along the first direction (R) and along the second direction;
• and
• the display screen further comprising a switchable light filter located in front in a viewing direction of a viewer or in the image reproduction unit, which switchable light filter in turn comprises:
• a first optical element and a second optical element, wherein each of the two optical elements
• comprises a first layer, or a first layer and a plurality of further layers,
• wherein each layer comprises a material with a plurality of light-absorbing transition dipole moments,
• wherein every transition dipole moment is oriented, at least in a first state with a tolerance of a maximum of 10°, parallel to a first reference direction which is selectable for the first optical element and second reference direction which is selectable for the second optical element or fluctuates around the latter,
• such that light which is incident in the first optical element or second optical element is transmitted or at least partially absorbed depending on its incident direction relative to the layers and its polarization state,
• wherein the transition dipole moments in each of the layers can be varied with respect to orientation and/or amount between the first state and at least one second state in order, alternately, to bring the respective layer into at least two different states,
• generator configured to selectively generate a first electric field or a second electric field, wherein, for each of the two optical elements, the first state is generated by applying the first electric field and the second state is generated by applying the second electric field,
• an optically anisotropic layer arranged between the two optical elements for rotating a polarization direction of light which penetrates the optically anisotropic layer by 90°,
• optionally, a polarization filter arranged above or below a unit comprising one of the two optical elements, or no polarization filter, so that
• in a first operating mode B1 in which the first electric field is applied, at least 24% of unpolarized light which is incident in the switchable light filter at any angle relative to the switchable light filter is transmitted, wherein in the first operating mode B1, the transition dipole moments of the two optical elements are oriented perpendicular to one another and, in case no polarization filter is present, polarization filter transition dipole elements of the polarization filter are oriented parallel to the transition dipole moments of the switchable optical element closest to the polarization filter, and
• in a second operating mode B2 in which the second electric field is applied, on the one hand, at least 24% of unpolarized light which is incident in the switchable light filter parallel to the first reference direction or to the second reference direction is transmitted and, on the other hand, at least 85% of unpolarized light which is incident in the switchable light filter in an angle of greater than 30° to the corresponding reference direction is absorbed, wherein in operating mode B2 the transition dipole moments of the polarization filter, if any, and the transition dipole moments of the switchable optical element closest to the polarization filter are oriented perpendicular to one another, and the transition dipole moments of the two optical elements are oriented parallel to one another.

A display screen comprising an image reproduction unit with a control unit and detector configured to detect a translation of the image reproduction unit relative to an initial position and/or a rotation of the image reproduction unit relative to an initial orientation and/or to detect an absolute position or relative position of the image reproduction unit with respect to a reference system, wherein the image reproduction unit changes, at least for a portion of its image surface, a relative luminance distribution curve for contents displayed thereon at least along a direction (R), which is selectable but fixedly oriented with respect to the image reproduction unit, when a translation path detected by the detector relative to the initial position is above a selectable threshold value and/or a detected angle of rotation relative to the initial orientation is above a respective selectable threshold value and/or an absolute position or relative position with respect to a reference system is outside a selectable tolerance;

• wherein the relative luminance distribution curve is wide along a first direction (R) and narrow along a second direction differing from the first direction (R), and wherein, after the aforementioned detection with a detected translation path and/or a detected angle of rotation above the respective selectable threshold value and/or an absolute position or relative position with respect to a reference system within the selectable tolerance, the relative luminance distribution curve is narrow along the first direction (R) and along the second direction;
• and
• the display screen further comprising a switchable light filter located in front in a viewing direction of a viewer or in the image reproduction unit, which switchable light filter in turn comprises:
• a first optical element and a second optical element, wherein each of the two optical elements
• comprises a first layer, or a first layer and a plurality of further layers,
• wherein each layer comprises a material with a plurality of light-absorbing transition dipole moments,
• wherein every transition dipole moment is oriented, at least in a first state with a tolerance of a maximum of 10°, parallel to a first reference direction which is selectable for the first optical element and second reference direction which is selectable for the second optical element or fluctuates around the latter,
• such that light which is incident in the first optical element or second optical element is transmitted or at least partially absorbed depending on its incident direction relative to the layers and its polarization state,
• wherein the first reference direction and the second reference direction of the transition dipole moments differ from one another by less than 40°,
• a liquid crystal layer which is arranged between the first optical element and the second optical element and which, depending on a first electric field or second electric field acting upon the liquid crystal layer, influences the polarization state of light penetrating through it,
• a generator configured to selectively generate the first electric field or the second electric field,
• optionally, a polarization filter which is arranged above or below a unit comprising one of the two optical elements, or no polarization filter, so that
• either, if the polarization filter is present, in a first operating mode B1 in which the first electric field is applied, with a first sub-operating mode B1H and a second sub-operating mode B1V, on the one hand, at least 24% of unpolarized light which is incident in the switchable light filter parallel to the first reference direction or second reference direction is transmitted and, on the other hand, at least 85% of unpolarized light which is incident in the switchable light filter in an angle of greater than 30° with respect to the corresponding reference direction is absorbed, wherein this absorption takes place exclusively along a first reference direction in the first sub-operating mode B1H and exclusively in a second reference direction perpendicular to the first reference direction in the second sub-operating mode B1V, wherein either the first reference direction or the second reference direction is perpendicular to a polarization direction of the polarization filter,
• or, if no polarization filter is present, in a first operating mode B1 in which the first electric field is applied, at least 24% of unpolarized light which is incident in the switchable light filter at any angle is transmitted,
• and, regardless of the presence of a polarization filter, in a second operating mode B2 in which the second electric field is applied, on the one hand, at least 24% of unpolarized light which is incident in the switchable light filter parallel to the first reference direction or to the second reference direction is transmitted and, on the other hand, at least 85% of unpolarized light which is incident in the switchable light filter in an angle of greater than 30° with respect to the corresponding reference direction is absorbed.