The present invention provides a braking device for an operating table base, comprising at least two supporting legs, each supporting leg having a pivoting end and a supporting end distanced from the pivoting end. The operating table base supports an operation bed whose projected area covers the operating table base. The operating table base has a first pivoting portion corresponding to each supporting leg, and each supporting leg has a second pivoting portion at the pivoting end to correspond to the first pivoting portion of the operating table base. The first pivoting portion pivotally connects to the second pivoting portion, so that each supporting leg rotates with respect to the operating table base. The supporting ends of the supporting legs extend a supporting area of the operating table base.
The present invention provides an LED driver circuit, comprising a voltage converter electrically connected to a power supply and an LED string, wherein the voltage converter provides a fixed voltage to the LED string; and a current-based light-adjusting unit electrically connected to the voltage converter, wherein the current-based light-adjusting unit controls the amplitude of the current flowing through the LED string, in an analog manner and based on a duty cycle of a pulse width modulation signal.
H05B 33/08 - Circuit arrangements for operating electroluminescent light sources
F21S 4/10 - Lighting devices or systems using a string or strip of light sources with light sources attached to loose electric cables, e.g. Christmas tree lights
3.
Surgical light with luminous intensity fine adjustment function
Provided is a surgical light with luminous intensity fine adjustment (LIFA) function, which includes a suspension or support system; one or more light heads carried by the suspension or support system; one or more light sources mounted in the light heads for being operable to supply lighting; one or more driving circuits connected to the light sources for being operable to drive the light sources; one or more operation interfaces connected to the driving circuits to allow for adjustment of the luminous intensities of the light sources between a topmost limit value of luminous intensity and a bottommost limit value of luminous intensity; one or more maximum LIFA activation/deactivation manners allowing the operation interfaces or the driving circuits to enter/exit the maximum/minimum LIFA mode for adjusting and storing the topmost/bottommost limit value of luminous intensity.
A61B 1/06 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor with illuminating arrangements
H05B 33/08 - Circuit arrangements for operating electroluminescent light sources
An automatic light intensity compensating device of a surgical light includes a suspension or support system and one or multiple light heads carried on the suspension or support system. Each of the light head includes a housing, one or multiple grips mounted to the housing for hand holding and moving the light head to a desired position, one or multiple light sources mounted in the housing for illumination, a focus adjustment mechanism for adjusting the focal length of illumination, a focusing detection mechanism for detecting a position of the focus adjustment mechanism within a variation range, and an automatic illuminance compensation device, which automatically increases or decreases luminance of the light source according to the position of the focus adjustment mechanism.
F21V 17/02 - Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages with provision for adjustment
F21V 23/04 - Arrangement of electric circuit elements in or on lighting devices the elements being switches
F21W 131/205 - Lighting for medical use for operating theatres
A energy-saving device of surgical light includes a suspension or support system; a light head carried on the suspension or support system and includes a housing, a grip mounted to the housing for hand holding and moving the light head, multiple light clusters mounted in the housing and each including at least one light source, and multiple detection pairs mounted in the housing and each including an emitter and a receiver, in which the emitter transmits a signal that is reflected by an external object to the receiver to detect the external object at a specific site and a specific distance from the light head; a light source driver operable to drive the light clusters according to the detection result of the detection pairs; and an operation interface connected to the light source driver and configured for energy saving modes of fixed light intensity and compensation light intensity.
F21V 33/00 - Structural combinations of lighting devices with other articles, not otherwise provided for
F21Y 105/18 - Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the overall shape of the two-dimensional array annularPlanar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the overall shape of the two-dimensional array polygonal other than square or rectangular, e.g. for spotlights or for generating an axially symmetrical light beam
F21W 131/205 - Lighting for medical use for operating theatres
The LED illuminant module for medical luminaires contains a circuit board capable of heat dissipation, an LED die package, a beam splitter, and a reflector. The LED die package is attached to the circuit board and is covered by the beam splitter, which in turn is pressed by and positioned along with the reflector. Central beams from the LED die package are collimated by the beam splitter to project forward. The side light beams are refracted by the beam splitter, intercepted by the reflector, and directed to a target coverage area along with the central light beams. The illuminant module is able to achieve low energy consumption and ease of manufacturing simultaneously.
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