Even when a light source is driven under various conditions, an effective driving time is accurately calculated. A laser apparatus includes a light source, a power source which charges driving current to the light source, a control unit for controlling the power source, a first recording unit which calculates a life load rate of the light source and records the same in association with time, and a calculation unit which calculates, as an effective driving time, a time integration of the life load rate between a first time point, at which the laser apparatus is actually driven, and a second time point after the first time point, based on a recording result of the first recording unit.

Systems and methods for implementing digital vision diagnostics are described and can include: (1) projecting images onto an individual's retina; (2) modelling the optics of the retina; (3) collecting user input/feedback in response to the projected image(s); (4) collecting other known vision-related data or contextual metadata; (5) diagnosing at least one vision-related or diagnostic parameter of the individual based on a combination of (1)-(4). Systems and methods for implementing digital vision compensation are further described and can include: (1) digitally capturing image(s) of an individual's field-of-view or portion thereof, or retrieving pre-recorded image(s); (2) determining or retrieving at least one vision-related or diagnostic parameter of the individual (e.g., using digital vision diagnostic technique(s)); (3) process the captured or pre-recorded digital image(s) to create compensated digital image(s); and (4) display or project the compensated digital image(s) to the individual.

Systems and methods for implementing digital vision diagnostics are described and can include: (1) projecting images onto an individual's retina; (2) modelling the optics of the retina; (3) collecting user input/feedback in response to the projected image(s); (4) collecting other known vision-related data or contextual metadata; (5) diagnosing at least one vision-related or diagnostic parameter of the individual based on a combination of (1)-(4). Systems and methods for implementing digital vision compensation are further described and can include: (1) digitally capturing image(s) of an individual's field-of-view or portion thereof, or retrieving pre-recorded image(s); (2) determining or retrieving at least one vision-related or diagnostic parameter of the individual (e.g., using digital vision diagnostic technique(s)); (3) process the captured or pre-recorded digital image(s) to create compensated digital image(s); and (4) display or project the compensated digital image(s) to the individual.

The present disclosure relates to a display device comprising at least two display units as well as an illuminating device for illuminating a transition area between the at least two display units. The disclosure further relates to a method of operating such a display device as well as an entertainment machine comprising such a display device.

An apparatus generates a coherent illumination beam. An embedded light-scattering apparatus in a transparent substrate illuminates a reflective optical element which is also embedded inside the same substrate. The reflective optical element is designed to provide a desired beam profile.

To prevent effectively the flickering of an image due to the switching of a polarization direction while reducing speckle noise. A polarization switching unit is provided in an optical path of laser light to a projection surface A and periodically switches a polarization direction of the laser light emitted therefrom between p and S polarization. A laser control unit controls laser light sources in synchronization with the switching by the polarization switching unit and determines a driving current corresponding to a grayscale to be displayed on the basis of driving current characteristics for P polarization when the polarization direction of the laser light is the P polarization. In addition, the laser control unit determines the driving current corresponding to the grayscale to be displayed on the basis of the driving current characteristics for P polarization when the polarization direction of the laser light is the S polarization.

To prevent effectively the flickering of an image due to the switching of a polarization direction while reducing speckle noise. A polarization switching unit is provided in an optical path of laser light to a projection surface A and periodically switches a polarization direction of the laser light emitted therefrom between p and S polarization. A laser control unit controls laser light sources in synchronization with the switching by the polarization switching unit and determines a driving current corresponding to a grayscale to be displayed on the basis of driving current characteristics for P polarization when the polarization direction of the laser light is the P polarization. In addition, the laser control unit determines the driving current corresponding to the grayscale to be displayed on the basis of the driving current characteristics for P polarization when the polarization direction of the laser light is the S polarization.

This image display apparatus includes a plurality of laser beam source portions outputting laser beams of a plurality of color components different from each other, a synthesized beam generation portion synthesizing the laser beams of the plurality of color components, a control portion controlling the outputs of the laser beam source portions, and a driving current correction portion estimating a variation in the threshold current of each of the laser beam source portions and correcting a driving current on the basis of the estimated variation in the threshold current.

This image display apparatus includes a plurality of laser beam source portions outputting laser beams of a plurality of color components different from each other, a synthesized beam generation portion synthesizing the laser beams of the plurality of color components, a control portion controlling the outputs of the laser beam source portions, and a driving current correction portion estimating a variation in the threshold current of each of the laser beam source portions and correcting a driving current on the basis of the estimated variation in the threshold current.

According to the present invention there is provided a projection device, which is configured to project an image which is co-operable with images projected by one or more other projection devices, wherein the projection device comprises a detector operable to detect characteristics of images projected on a display surface by the projection device and one or more other projection devices, and a controller operable to adjust the projection device and/or to adjust one or more of the other projection devices, based on the characteristics of the images detected by the detector, such that the images projected by each projection device co-operate on the display surfaces.