Abstract: This electronic endoscope apparatus having an insertable part inserted into an observation object and provided with a solid state imaging device imaging the observed image, an image forming optical system forming the observed image on said solid state imaging device and a displaying apparatus displaying an electric signal transmitted from said solid state imaging device, characterized by having a plurality of 1-field memories which can electrically invert the observed image obtained by the image forming optical system.

Abstract: Disclosed is a light source device for an endoscope including a lamp to flash or to normally emit light according to current fed thereto, a shutter for photographing, and a diaphragm for photographing/observing. In the light source device, the amount of light emitted is variable. In response to a supplied check start command signal, except when the endoscope body is used, the light source device successively checks at least two of the following items; the operation of the shutter, the operation of the diaphragm, normal light emission of the lamp and the flashing of the lamp. Then, the light source device automatically checks, according to the amount of light detected by a photosensitive element, whether the above functions are operating normally or not, and displays the result of the check.

Abstract: A control system with a microprocessor controls an output pressure of a water/air pump and a light amount of a light source lamp in an endoscope. Under control of a program, the microprocessor periodically accesses a decoder to periodically generate a pulse signal. The generated pulse signal is applied to a watch dog type detector for detecting an abnormal operation of the microprocessor. When the microprocessor operates abnormally and is detected, the microprocessor is reset, and an output pressure of a water/air pump and a light amount of a light source lamp are respectively set at the maximum levels independently of the control by the microprocessor.

Abstract: An endoscope system includes an endoscope, an endoscope camera and a light source device. The light source device has an error detection unit for detecting an error of communication data and an error recovery unit for performing an error recovery operation in correspondence with an error content detected by the error detection unit.

Abstract: A light supply apparatus for an endoscope comprises a discharge lamp for supplying light to an endoscope, and a microprocessor for controlling various devices such as a display unit for displaying data. The discharge lamp is ignited by an ignition signal. The microprocessor is reset by the ignition signal. The display unit is held in the same state as before the ignition of the lamp even when the microprocessor is reset.