초록 ▼

A hand-held surgical light assembly is provided with a light source, and a handpiece which is adapted to be grasped and manipulated by a user. The handpiece has a light guide with a proximal end optically connected to the light source, and a distal end which projects outwardly from said handpiece so

A hand-held surgical light assembly is provided with a light source, and a handpiece which is adapted to be grasped and manipulated by a user. The handpiece has a light guide with a proximal end optically connected to the light source, and a distal end which projects outwardly from said handpiece so as to direct light guided thereby onto a field of view determined by manipulation of the handpiece by the user. The handpiece includes a switch assembly which is operatively coupled to the light source to allow user selection between at least two different light intensities (e.g., essentially on/off) discharged by said light guide onto the field of view. In preferred forms, the switch assembly includes an electrically conductive inner base member and an electrically conductive outer tubular elastomeric member concentrically positioned in surrounding, but spaced relationship, with the inner base member. When contact between the inner base member and the outer elastomeric member is made, switch circuitry changes the visible light intensity of the visible light generated by the light source, e.g., by either directly modulating the current to the lamp itself, or by providing an electrically operable shutter assembly which masks the light generated by the light source. The former embodiment is especially well suited for surgical lights which are self-contained (i.e., have the light sources contained in the handpiece), while the latter is especially well suited for surgical lights which have remotely positioned light sources.

대표청구항 ▼

A hand-held surgical light assembly is provided with a light source, and a handpiece which is adapted to be grasped and manipulated by a user. The handpiece has a light guide with a proximal end optically connected to the light source, and a distal end which projects outwardly from said handpiece so

A hand-held surgical light assembly is provided with a light source, and a handpiece which is adapted to be grasped and manipulated by a user. The handpiece has a light guide with a proximal end optically connected to the light source, and a distal end which projects outwardly from said handpiece so as to direct light guided thereby onto a field of view determined by manipulation of the handpiece by the user. The handpiece includes a switch assembly which is operatively coupled to the light source to allow user selection between at least two different light intensities (e.g., essentially on/off) discharged by said light guide onto the field of view. In preferred forms, the switch assembly includes an electrically conductive inner base member and an electrically conductive outer tubular elastomeric member concentrically positioned in surrounding, but spaced relationship, with the inner base member. When contact between the inner base member and the outer elastomeric member is made, switch circuitry changes the visible light intensity of the visible light generated by the light source, e.g., by either directly modulating the current to the lamp itself, or by providing an electrically operable shutter assembly which masks the light generated by the light source. The former embodiment is especially well suited for surgical lights which are self-contained (i.e., have the light sources contained in the handpiece), while the latter is especially well suited for surgical lights which have remotely positioned light sources. placement in position, the snap-in locking member provides an obstruction that prevents the eyeglass shield from being slid forward past the hinge casing for the eyeglass temple. It also serves to further block movement of the eyeglass shield backward past the expanded padding or inserts. tion channels. 3. The display system of claim 2, wherein the at least one light source includes an arc lamp. 4. The display system of claim 2, wherein the at least one light source includes a laser. 5. The display system of claim 2, wherein the at least one light source includes a light-attenuating device. 6. The display system of claim 5, wherein the light source is connected to the controller, and wherein the brightness of the light source is varied by the controller depending on how much of the image the projection channel is required to project. 7. The display system of claim 2, wherein each projection channel includes a light modulator that is connected to the controller and responsive to signals from the controller to modulate light from the at least one light source to form the portion of the image to be displayed by the projection channel. 8. The display system of claim 7, wherein each projection channel further includes a variably focusing lens assembly disposed between the light modulator and the display area and connected to the controller, wherein the variably focusing lens assembly is controlled by the controller to adjust the size of the portion of the image that is projected by the projection channel. 9. The display system of claim 8, wherein the controller further includes a content-controlling element that controls the content of the portion of the image that each projection channel projects, and further wherein the controller compensates for an inoperative projection channel by adjusting the content of the portions projected by the remaining operative channels. 10. The display system of claim 7, wherein the light modulator includes at least one liquid-crystal display (LCD). 11. A display system for projecting an image on a display area, the image having a size and a content, the system comprising: a first projection channel that includes a first light modulator configured to modulate light to form a first portion of the image, and a first variably-focusable lens assembly that focuses the first portion of the image for display on the display area; a second projection channel that includes a second light modulator configured to modulate light to form a second portion of the image, and a second variably-focusable lens assembly that focuses the second portion of the image for display on the display area; a third projection channel that includes a third light modulator configured to modulate light to form a third portion of the image, and a third variably-focusable lens assembly that focuses the third portion of the image for display on the display area; a controller that controls the first, second and third lens assemblies such that when the first, second and third projection channels are in an operative state, the first portion of the image is displayed on a first section of the display area, the second portion of the image is displayed on a second section of the display area, and the third portion of the image is displayed on a third section of the display area, wherein each of the first, second and third sections of the display area are substantially mutually exclusive and combine to cover substantially all of the display area, the controller being further configured so that, upon failure of one of the projection channels, the controller adjusts the portions of the image to be projected by the remaining operative channels by controlling the light modulators and the variably-focusing lens assemblies of the remaining operative projection channels to optimize the size and content of the image. 12. The display system of claim 11, further including at least one light source that is configured to supply light to at least one of the projection channels. 13. The display system of claim 12, wherein the at least one light source includes an arc lamp. 14. The display system of claim 12, wherein the at least one light source is a variable-brightness light source. 15. The display system of claim 14, wherein the var