EP0523781A2
Expired / Lapsed
EP
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Charge-coupled imaging device and camera provided with such an imaging device
Assignee: Koninklijke Philips NV
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Filing: 1992-07-07
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Granted: —
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Expires: 2012-07-07
Abstract
Abstract The invention relates to a 3-phase charge-coupled imaging device which is operated in the interlace mode. During integration, voltages are applied to the clock electrodes such that charge is integrated below the same set of electrodes each time. The signal charges of the first field are formed in that 3/4 portion of the charge in each picture element is augmented by 1/4 portion of the charge of the preceding picture element, while the signal charges of the second field are formed in that the said 3/4 portion is augmented by 1/4 portion of the charge generated in the following picture element. These summations may be carried out in the sensor itself in that the charge packages are shifted to the left and right during integration. The flicker which is usually the result of interlacing is very strongly reduced in this way. <IMAGE>
Inventors
- 👤 Michael Alwin William Stekelenburg
- 👤 Hermanus Leonardus Peek
- 👤 Colm John Sweeney
- 👤 Alouisius Wilhelmus Marinus Korthout
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 13:26
CPC Classifications
H; H10; H10F; H10F39/00; H10F39/10; H10F39/12; H10F39/15; H10F39/153; H04; H04N; H04N25/00; H04N25/60; H04N25/68; H04N25/683; H04N25/40; H04N25/46; H04N25/50; H04N25/53; H04N25/62; H04N25/621; H04N25/622; H04N25/70; H04N25/71; H04N25/72
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
162 words
A charge-coupled imaging device having a 3-phase charge-coupled device comprising a row of clock electrodes situated above a charge transport channel defined in a semiconductor body, clock voltage means being present for applying clock voltages to the clock electrodes, characterized in that equal voltages are applied to the clock electrodes during the two integration periods at least during the major portion of their duration, and in that a raster of charge packages containing information is formed by summation of at least approximately 3/4 portion of the charge which is generated in one of the integration periods in a picture element i (i = 1, 2, 3, etc.) and 1/4 portion of the charge which is generated in the picture element (i-1), and in that the second raster is formed by summation of 3/4 portion of the charge which is generated in a picture element i in the other integration period and 1/4 portion of the charge generated in the picture element (i+1).
Claim 2
Dependent Claim
76 words
A charge-coupled imaging device as claimed in Claim 1, characterized in that for the purpose of the summations charge packages formed by integration of generated charge for at least approximately 3/4 portion of the duration of an integration period in a certain picture element are moved for the remaining 1/4 portion of the integration period to the preceding picture element to obtain the first raster, or to the following picture element to obtain the second raster.
Claim 3
Dependent Claim
98 words
A charge-coupled imaging device as claimed in Claim 2, characterized in that the charge-coupled device forms part of a two-dimensional image sensor of the frame transfer type (FT sensor) with a pattern of picture elements arranged in rows and columns forming an image sensing section, and with a corresponding pattern of memory elements forming a memory section in which the raster of charge packages formed during the first integration period can be stored, while at the same time in the image sensing section the second raster of charge packages belonging to the second integration period is being formed.
Claim 4
Dependent Claim
103 words
A charge-coupled imaging device as claimed in Claim 3, characterized in that adjacent the memory section a readout register is situated with which the raster of charge packages stored in the memory section is read out line by line during a time called line time hereinafter, while at the same time charge packages of the following raster are formed in the image sensing section by storing these packages alternately during three line times in a picture element corresponding to each package and subsequently during one line time in the preceding or the following picture element in the same column, depending on the raster.
Claim 5
Dependent Claim
37 words
A charge-coupled imaging device as claimed in Claim 4, characterized in that the transport of charge packages between the said corresponding picture element and the preceding or following picture element always takes place between two line times.
Claim 6
Dependent Claim
17 words
A camera provided with a charge-coupled imaging device as claimed in any one of the preceding Claims.
References Cited (Backward Citations)
No citation records indexed.
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