Patent ID: 7045759
Filing Date: 2006-05-16
Classification: H04N

Abstract:
1. A night vision system, comprising: a device that emits electro-magnetic radiation towards a subject; a camera that captures an image of the subject illuminated by the device; a display, operably connected to the camera, that displays a captured image; and a controller that is operably connected to and controls operation of the device, the camera and the display, the controller including a second circuit, a first circuit, a gamma adjuster and a gamma amplifier, wherein the controller: receives a brightness signals, constituting an image signal indicative of an image to be displayed on the display from the second circuit; produces a gamma correction signal from the brightness signal based on a brightness ratio characteristic via the gamma adjuster in which a display brightness is set to a maximum brightness using a first brightness correction ratio when a signal level of the brightness signal is a maximum signal level, and the display brightness is set using a second brightness correction ratio which is lower than the first brightness correction ratio when the signal level of the brightness signal is lower than the maximum signal level; and outputs the produced gamma correction signal to the display via the gamma amplifier.