Head-mounted illuminator with capacitive proximity control
Head-mounted accessories for surgeons and medical/dental practitioners are equipped with no-touch controls including, in different embodiments, passive and active infrared detection, voice operation, and capacitive proximity control. Compared to infrared, capacitive proximity control may be more omni-directional, whereas IR, particularly active IR, tends to be more effective in a cone of operation. Compared to voice activation, capacitive sensing is less expensive and less prone to false activation based upon ambient noise or other voices. The invention may be used to control other medical/dental accessories such as a head-mounted video camera, in which case the controller is further operative to at least turn the video camera ON or OFF. More preferably, a controller is additionally operative to control the focus or zoom of the video camera in accordance with touch-free commands.
1. A head-mounted illuminator system with capacitive control, comprising:
a battery unit including one or more batteries providing DC power;
head-mounted components, physically remote from the battery unit, and wherein the head-mounted components including the following:
a capacitive proximity sensor coupled to a metal sensing surface;
a power switch separate from the capacitive proximity sensor; and
an LED illuminator; and
wherein the DC power is provided to the power switch, and the capacitive proximity sensor is operative to control the power switch to toggle the LED illuminator between an ON condition and an OFF condition when a human hand is positioned proximate to the metal sensing surface.
2. The head-mounted illuminator system of claim 1 , wherein at least the LED illuminator is disposed in a housing that includes the metal sensing surface.
3. The head-mounted illuminator system of claim 1 , wherein only DC power and ground wires are used to interconnect the battery unit to the head-mounted components.
4. The head-mounted illuminator system of claim 1 , wherein the capacitive proximity sensor, power switch, and LED illuminator are disposed in a common housing that includes the metal sensing surface.
5. The head-mounted illuminator system of claim 1 , wherein the battery unit includes a brightness control that varies the level of DC power provided to the power switch.
6. The head-mounted illuminator system of claim 1 , further including a coupler unit operative to interconnect the capacitive proximity sensor, power switch and LED illuminator.
7. The head-mounted illuminator system of claim 1 , further including apparatus for mounting the LED illuminator to a pair of eyeglass frames.
8. The head-mounted illuminator system of claim 1 , further including apparatus for mounting the LED illuminator to a headband.
9. The head-mounted illuminator system of claim 1 , wherein the head-mounted components include a proximity distance adjustment control.
10. The head-mounted illuminator system of claim 9 , wherein the proximity distance control is in the range of 1-5 cm.
11. The head-mounted illuminator system of claim 9 , wherein the proximity distance control is in the range of 2-3 cm.
12. The head-mounted illuminator system of claim 1 , wherein capacitive proximity sensor is operative to differentiate between non-contact sensing with metal sensing surface and physically touching the metal sensing surface.
13. The head-mounted illuminator system of claim 1 , wherein non-contact sensing with metal sensing surface is used for LED ON/OFF control and physically touching the metal sensing surface is used for one or more mode-setting functions.
14. The head-mounted illuminator system of claim 13 , wherein the one or more mode-setting functions includes proximity control distance adjustment.
15. The head-mounted illuminator system of claim 14 , wherein the LED illuminator is used to provide optical feedback to a user regarding mode-setting or distance adjustment junctions.
16. The head-mounted illuminator system of claim 15 , wherein the LED illuminator comes ON, turns OFF or flashes in conjunction with the mode-setting or distance adjustment junctions.
17. The head-mounted illuminator system of claim 1 , wherein the metal sensing surface forms part of a headband.
18. The head-mounted illuminator system of claim 1 , wherein the metal sensing surface forms part of eyeglass frames.