초록 ▼

A projector with a laser light source projects an image. In order to reduce the risk for a person to be exposed to harmful levels of laser light, the projector also projects a time-variant alerting image into an alerting region. Alerting region is arranged outside of the projection region. The alert

A projector with a laser light source projects an image. In order to reduce the risk for a person to be exposed to harmful levels of laser light, the projector also projects a time-variant alerting image into an alerting region. Alerting region is arranged outside of the projection region. The alerting image is of a wave length visible to the human eye, and of an intensity of eye-safe level.

대표청구항 ▼

1. Projector comprising: a laser light source (16),modulation and projections means for modulating the light from said laser light source (16) and projecting said light into a direction within a projection region to generate a projected image (12) filling said projection region,and means for project

1. Projector comprising: a laser light source (16),modulation and projections means for modulating the light from said laser light source (16) and projecting said light into a direction within a projection region to generate a projected image (12) filling said projection region,and means for projecting an alerting image (22 ) into a direction of an alerting region (20) outside of said projection region (12), where the alerting light used for generating said alerting image (22) is of a wavelength visible to the human eye, and of an intensity of eye-safe level,wherein said alerting light used for generating said alerting image (22) originates from said laser light source. 2. Projector according to claim 1, where said alerting region (20) is located adjacent to said projection region (12). 3. Projector according to one claim 1, said projector further comprising a detection device (62) for detecting the presence and/or movement of objects within a detection region,and controlling means (60) operable to only activate said alerting image if said detection device (62) indicates a presence and/or movement of an object within said detection region. 4. Projector according to claim 1, where said alerting light is a laser light beam (50) or bundle of an intensity high enough to cause glare to the human eye. 5. Projector according to claim 1, where said projection region (12) comprises a plurality of sections (12a, 12b, 12c, 12d), and said alerting region (20) comprises a plurality of sections (22a, 22b, 22c, 22d), each section of said alerting region (20) being located adjacent to at least one of said sections (12a, 12b, 12c, 12d) of said projection region (12),where the intensity and/or color of each section (22a, 22b, 22c, 22d) of said alerting image (22) is dependent on the intensity and/or color of said adjacent section (12a, 12b, 12c, 12d) of said projection region (12). 6. Projector according to claim 1, where said laser light source (16) is operable to modulate an emitted laser beam (24),where said projector (10a, 10b) comprises a movable reflection means (48) to reflect said laser light beam (24) into a direction within a projection region (12),and where said movable reflection means (48) is operable to reflect said laser light beam (24) into the direction of said projection region (12) in a raster scanning manner. 7. Projector according to claim 6, where said means for projecting said alerting image comprise at least one separate laser light source (52),where light emitted by said separate laser light source (52) is reflected by the same movable reflection means (48) as the light used to project said image (12). 8. Projector according to claim 1, said projector further comprising a light valve unit (30, 30a, 30b) to modulate the light (24) from said laser light source (16) to create a first laser light bundle (24b) comprising said image. 9. Projector according to claim 8, said projector further comprising a lens (38) projecting said first bundle (24h) into the direction of the projection region (12),where said first bundle (24b) is projected only through a central portion of said lens (38),and where said alerting image (22) is projected also through a peripheral portion of said lens (38). 10. Projector according to claim 8, where said light valve unit (30, 30a, 30b) comprises a digital mirror device (32) comprising a plurality of movable micro-reflectors, said digital mirror device (32) being operable to modulate said light to create said first bundle (24b),and at least one reflective surface (40, 40a, 40b) located adjacent to said digital mirror device (32) with regard to the beam direction of said light,where said reflective surface (40, 40a, 40b) is arranged such that said light is reflected at said surface and projected into said alerting region (20). 11. Method for operating a projector, where laser light is generated and projected into a direction of a projection region (12) to generate a projected image (12) filling said projection region,and an alerting image (22) is projected into a direction outside of said projection region,where the alerting light used to generate said alerting image of a wave length visible to the human eye, and of an intensity of eye-safe level,wherein said alerting light used for generating said alerting image(22) originates from said laser light source. 12. Projector according to claim 1, where said alerting image (22) is pulsating. 13. Projector according to claim 1, where said alerting image (22) is time-variant.