Endoscopy device

Abstract

An endoscopy device (1) according to one embodiment includes a CCD (7) and an LED control unit (17) (control unit (15)) for controlling an LED (1) and an LED (2). The LED control unit (17) sequentially drives the two LEDs (1), (2) during an imaging cycle (S) of the CCD (7) so that drive times of the LED (1) and the LED (2) do not overlap, on the basis of an imaging start time signal for every imaging cycle (S), and also variably controls the drive times of the LED (1) and LED (2) in order to adjust an amount of light exposure during the imaging cycle (S). The LED control unit (17) also controls at least the initial driving during the imaging cycle (S) of the LED (2), which is driven secondly or later during the imaging cycle (S), so as to be implemented on the basis of the drive timing of the LED (1), which is driven earlier.

Description

technical field [0001] The present invention relates to an endoscope apparatus including a plurality of illumination units that emit illumination light to an observation site, and a control unit that controls driving of the plurality of illumination units. Background technique [0002] As an endoscope device, a so-called electronic endoscope device is generally known. This electronic endoscope device has an illumination unit that emits illumination light. Return light of illumination light reflected by the subject is received (exposed) by a solid-state imaging device such as a CCD (Charge Coupled Device) and photoelectrically converted to obtain an image signal corresponding to an image of the subject. [0003] Among such electronic endoscope devices, a so-called face-sequential type endoscope device is generally known. A surface-sequential endoscope device does not have a light-receiving side color filter in front of a light-receiving element of a solid-state imaging devic...

AI Technical Summary

Problems solved by technology

[0011] However, it is not easy to change the clock frequency of the timing signal for driving the CCD in order to change and control the imaging period of the CCD and the lighting period of the LED in this way. , will also lead to a complex circuit structure, resulting in an expensive system as a whole

[0012] In addition, in the endoscope device described in Japanese Patent Application Laid-Open No. 2007-29746, the imaging cycle of the solid-state imaging device can only be selected from a plurality of predetermined cycles, and fine control of the imaging cycle cannot be performed according to the observation situation.

In addition, if the number of predetermined cycles is increased, the circuit configuration becomes complicated, resulting in an expensive system as a whole.

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