Electronic endoscope
First Claim
1. An electronic endoscope, comprising:
- an image sensor that converts an optical image into analog electric image-pixel signals;
an analog-to-digital converter that converts said analog electric image-pixel signals into digital electric image-pixel signals on a basis of a first series of clock pulses, a number of converted digital electric image-pixel signals included in one-horizontal-scanning-line being based upon a frequency of said first clock pulses;
a pixel-number converter that converts said number of converted digital electric image-pixel signals into another number of digital image-pixel signals so as to enable said digital electric image-pixel signals to be externally outputted on a basis of a second series of clock pulses having a frequency different from that of said first clock pulses; and
a determiner that determines whether said frequency of said first clock pulses is larger than said frequency of said second clock pulses,wherein said digital electric image-pixel signals converted from said analog electric image-pixel signals by said analog-digital converter are subjected to a thinning-process executed by said pixel-number converter when it is determined by said determiner that said frequency of said first clock pulses is larger than said frequency of said second clock pulses, and said digital electric image-pixel signals converted from said analog electric image-pixel signals by said analog-digital converter are subjected to a interpolating-process executed by said pixel-number converter when it is determined by said determiner that said frequency of said first clock pulses is smaller than said frequency of said second clock pulses.
4 Assignments
0 Petitions
Accused Products
Abstract
An electronic endoscope has an image sensor for converting an optical image into analog electric image-pixel signals, and an analog-to-digital converter for converting the analog electric image-pixel signals into digital electric image-pixel signals on the basis of a first series of clock pulses. A number of the converted digital electric image-pixel signals included in a one-horizontal-scanning-line being is based upon a frequency of the first series of clock pulses. The endoscope has a pixel-number converter for converting the number of the converted digital electric image-pixel signals into another number of digital image-pixel signals so as to enable the digital electric image-pixel signals to be externally outputted on the basis of a second series of clock pulses having a frequency different from that of the first clock pulses.
55 Citations
53 Claims
-
1. An electronic endoscope, comprising:
-
an image sensor that converts an optical image into analog electric image-pixel signals; an analog-to-digital converter that converts said analog electric image-pixel signals into digital electric image-pixel signals on a basis of a first series of clock pulses, a number of converted digital electric image-pixel signals included in one-horizontal-scanning-line being based upon a frequency of said first clock pulses; a pixel-number converter that converts said number of converted digital electric image-pixel signals into another number of digital image-pixel signals so as to enable said digital electric image-pixel signals to be externally outputted on a basis of a second series of clock pulses having a frequency different from that of said first clock pulses; and a determiner that determines whether said frequency of said first clock pulses is larger than said frequency of said second clock pulses, wherein said digital electric image-pixel signals converted from said analog electric image-pixel signals by said analog-digital converter are subjected to a thinning-process executed by said pixel-number converter when it is determined by said determiner that said frequency of said first clock pulses is larger than said frequency of said second clock pulses, and said digital electric image-pixel signals converted from said analog electric image-pixel signals by said analog-digital converter are subjected to a interpolating-process executed by said pixel-number converter when it is determined by said determiner that said frequency of said first clock pulses is smaller than said frequency of said second clock pulses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 11)
-
-
8. An electronic endoscope, comprising:
-
an image sensor that converts an optical image into analog electric image-pixel signals; an analog-to-digital converter that converts said analog electric image-pixel signals into digital electric image-pixel signals; a clock-pulse generator that selectively outputs one of a first series of clock pulses and a second series of clock pulses to said analog-to-digital converter for conversion of said analog electric image-pixel signals into digital electric image-pixel signals by said analog-to-digital converter, a number of said converted digital electric image-pixel signals included in one-horizontal-scanning-line being based upon one of a frequency of said first clock pulses and a frequency of said second clock pulses; a pixel-number converter that converts said number of digital electric image-pixel signals, based upon one of said frequency of said first clock pulses and said frequency of said second clock pulses, into another number of digital image-pixel signals so as to enable said digital electric image-pixel signals to be externally outputted on a basis of a third series of clock pulses having a frequency larger than said frequency of said first clock pulses but smaller than said frequency of said second clock pulses; and a determiner that determines whether either said first clock pulses or said second clock pulses should be outputted from said clock-pulse generator, wherein said digital electric image-pixel signals converted from said analog electric image-pixel signals by said analog-digital converter are subjected to a thinning-process executed by said pixel-number converter when it is determined by said determiner that said first clock pulses should be outputted from said clock-pulse generator, and said digital electric image-pixel signals converted from said analog electric image-pixel signals by said analog-digital converter are subjected to a interpolating-process executed by said pixel-number converter when it is determined by said determiner that said second clock pulses should be outputted from said clock-pulse generator. - View Dependent Claims (9, 10)
-
-
12. An electronic endoscope having a flexible conduit, a video-signal processor being detachably connected thereto, said endoscope comprising:
-
an image sensor provided in said flexible conduit for converting an optical image into analog electric image-pixel signals; an analog-to-digital converter that converts said analog electric image-pixel signals into digital electric image-pixel signals on a basis of a first series of clock pulses; a memory provided in said flexible conduit that stores frequency information concerning a frequency of said first clock pulses; a fetcher that fetches said frequency information from said memory when joining said flexible conduit to said video-signal processor; a clock-pulse generator that outputs said first clock pulses to said analog-to-digital converter on a basis of said frequency information fetched by said fetcher for said conversion of said analog electric image-pixel signals into said digital electric image-pixel signals by said analog-to-digital converter, a number of said converted digital electric image-pixel signals included in one-horizontal-scanning-line being based upon said frequency of said first clock pulses; and a pixel-number converter that converts said number of digital electric image-pixel signals, based upon said frequency of said first clock pulses, into another number of digital image-pixel signals so as to enable said digital electric image-pixel signals to be externally outputted on a basis of a second series of clock pulses having a frequency different from that of said first frequency. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
-
-
22. An electronic endoscope comprising:
-
image sensor means for converting an optical image into analog electric image-pixel signals; analog-to-digital converter means for converting said analog electric image-pixel signals into digital electric image-pixel signals on the basis of a first series of clock pulses, a number of the converted digital electric image-pixel signals included in a one-horizontal-scanning-line being based upon a frequency of said first series of clock pulses; pixel-number converter means for converting the number of the converted digital electric image-pixel signals into another number of digital image-pixel signals so as to enable said digital electric image-pixel signals to be externally outputted on the basis of a second series of clock pulses having a frequency different from that of said first clock pulses; and a determiner that determines whether said frequency of said first clock pulses is larger than said frequency of said second clock pulses, wherein said digital electric image-pixel signals converted from said analog electric image-pixel signals by said analog-digital converter are subjected to a thinning-process executed by said pixel-number converter when it is determined by said determiner that said frequency of said first clock pulses is larger than said frequency of said second clock pulses, and said digital electric image-pixel signals converted from said analog electric image-pixel signals by said analog-digital converter are subjected to a interpolating-process executed by said pixel-number converter when it is determined by said determiner that said frequency of said first clock pulses is smaller than said frequency of said second clock pulses. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31)
-
-
32. An electronic endoscope, comprising:
-
image sensor means for converting an optical image into analog electric image-pixel signals; analog-to-digital converter means for converting said analog electric image-pixel signals into digital electric image-pixel signals; clock-pulse generator means for selectively outputting one of a first series of clock pulses and a second series of clock pulses to said analog-to-digital converter means for conversion of said analog electric image-pixel signals into digital electric image-pixel signals by said analog-to-digital converter means, a number of said converted digital electric image-pixel signals included in a one-horizontal-scanning-line being based upon one of a frequency of said first clock pulses and a frequency of said second clock pulses; pixel-number converter means for converting said number of digital electric image-pixel signals, based upon one of said frequency of said first clock pulses and said frequency of said second clock pulses, into another number of digital image-pixel signals so as to enable said digital electric image-pixel signals to be externally outputted on a basis of a third series of clock pulses having a frequency larger than said frequency of said first clock pulses but smaller than said frequency of said second clock pulses; and a determiner that determines whether either said first clock pulses or said second clock pulses should be outputted from said clock-pulse generator means, wherein said digital electric image-pixel signals converted from said analog electric image-pixel signals by said analog-digital converter means are subjected to a thinning-process executed by said pixel-number converter means when it is determined by said determiner that said first clock pulses should be outputted from said clock-pulse generator means, and said digital electric image-pixel signals converted from said analog electric image-pixel signals by said analog-digital converter means are subjected to a interpolating-process executed by said pixel-number converter means when it is determined by said determiner that said second clock pulses should be outputted from said clock-pulse generator. - View Dependent Claims (33, 34, 35, 36)
-
-
37. An electronic endoscope having a flexible conduit and a video-signal processor detachable connected thereto, said endoscope comprising:
-
image sensor means, provided in said flexible conduit, for converting an optical image into analog electric image-pixel signals; analog-to-digital converter means for converting said analog electric image-pixel signals into digital electric image-pixel signals on a basis of a first series of clock pulses; memory means, provided in said flexible conduit, for storing frequency information concerning a frequency of said first clock pulses; fetcher means for fetching said frequency information from said memory means when said flexible conduit is connected to said video-signal processor; clock-pulse generator means for outputting said first clock pulses to said analog-to-digital converter means on the basis of said frequency information fetched by said fetcher means for conversion of said analog electric image-pixel signals into said digital electric image-pixel signals by said analog-to-digital converter means, a number of said converted digital electric image-pixel signals included in one-horizontal-scanning-line being based upon said frequency of said first clock pulses; and pixel-number converter means for converting said number of digital electric image-pixel signals, based upon said frequency of said first clock pulses, into another number of digital image-pixel signals, so as to enable said digital electric image-pixel signals to be externally outputted on the basis of a second series of clock pulses having a frequency different from that of said first frequency. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46)
-
-
47. An electronic endoscope, comprising:
-
image sensor means for converting an optical image into analog electric image-pixel signals; analog-to-digital converter means for converting said analog electric image-pixel signals into digital electric image-pixel signals; clock-pulse generator means for selectively outputting one of a first series of clock pulses and a second series of clock pulses to said analog-to-digital converter means for conversion of said analog electric image-pixel signals into digital electric image-pixel signals by said analog-to-digital converter means, a number of said converted digital electric image-pixel signals included in one-horizontal-scanning-line being based upon one of a frequency of said first clock pulses and a frequency of said second clock pulses; pixel-number converter means for converting said number of digital electric image-pixel signals, based upon one of said frequency of said first clock pulses and said frequency of said second clock pulses, into another number of digital image-pixel signals so as to enable said digital electric image-pixel signals to be externally outputted on a basis of a third series of clock pulses having a frequency larger than said frequency of said first clock pulses and said frequency of said second clock pulses; and determining means for determining whether either said first clock pulses or said second clock pulses should be outputted from said clock-pulse generator means, wherein said digital electric image-pixel signals converted from said analog electric image-pixel signals by said analog-digital converter means are subjected to a first thinning-process executed by said pixel-number converter means when it is determined by said determining means that said first clock pulses should be outputted from said clock-pulse generator means, and said digital electric image-pixel signals converted from said analog electric image-pixel signals by said analog-digital converter means are subjected to a second thinning-process executed by said pixel-number converter means when it is determined by said determining means that said second clock pulses should be outputted from said clock-pulse generator means. - View Dependent Claims (48, 49)
-
-
50. An electronic endoscope, comprising:
-
an image sensor that converts an optical image into analog electric image-pixel signals; an analog-to-digital converter that converts said analog electric image-pixel signals into digital electric image-pixel signals; a clock-pulse generator that selectively outputs one of a first series of clock pulses and a second series of clock pulses to said analog-to-digital converter for conversion of said analog electric image-pixel signals into digital electric image-pixel signals by said analog-to-digital converter, a number of said converted digital electric image-pixel signals included in one-horizontal-scanning-line being based upon one of a frequency of said first clock pulses and a frequency of said second clock pulses; a pixel-number converter that converts said number of digital electric image-pixel signals, based upon one of said frequency of said first clock pulses and said frequency of said second clock pulses, into another number of digital image-pixel signals so as to enable said digital electric image-pixel signals to be externally outputted on a basis of a third series of clock pulses having a frequency larger than said frequency of said first clock pulses and said frequency of said second clock pulses; and a determiner that determines whether either said first clock pulses or said second clock pulses should be outputted from said clock-pulse generator, wherein said wherein said digital electric image-pixel signals converted from said analog electric image-pixel signals by said analog-digital converter are subjected to a first thinning-process executed by said pixel-number converter when it is determined by said determiner that said first clock pulses should be outputted from said clock-pulse generator, and said digital electric image-pixel signals converted from said analog electric image-pixel signals by said analog-digital converter are subjected to a second thinning-process executed by said pixel-number converter when it is determined by said determiner that said second clock pulses should be outputted from said clock-pulse generator. - View Dependent Claims (51, 52)
-
-
53. An electronic endoscope, comprising:
-
an image sensor that converts an optical image into analog electric image-pixel signals; an analog-to-digital converter that converts said analog electric image-pixel signals into digital electric image-pixel signals; a clock-pulse generator that selectively outputs one of a first series of clock pulses and a second series of clock pulses to said analog-to-digital converter for conversion of said analog electric image-pixel signals into digital electric image-pixel signals by said analog-to-digital converter, a first number of said digital electric image-pixel signals included in one-horizontal-scanning-line, converted by the outputting of said first clock pulses, being based upon a frequency of said first clock pulses, a second number of said digital electric image-pixel signals included in one-horizontal-scanning-line, converted by the outputting of said second clock pulses, being based upon a frequency of said second clock pulses; a determiner that determines whether either said first clock pulses or said second clock pulses should be outputted from said clock-pulse generator; a pixel-number converter that converts said first number of digital electric image-pixel signals, based upon said frequency of said first clock pulses, into a third number of digital image-pixel signals so as to enable said digital electric image-pixel signals to be externally outputted on a basis of a third series of clock pulses having a frequency different from said frequency of said first clock pulses and said frequency of said second clock pulses, when it is determined by said determiner that said first clock pulses should be outputted from said clock-pulse generator and that converts said second number of digital electric image-pixel signals, based upon said frequency of said first clock pulses, into said third number of digital image-pixel signals so as to enable said digital electric image-pixel signals to be externally outputted on a basis of said third series of clock pulses, when it is determined by said determiner that said first clock pulses should be outputted from said clock-pulse generator.
-
Specification