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Concept Search - What can I type?
For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.
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A line array of light-emitting diodes (LEDs) has been reported as an exposure source for a copier-printer. The structure herein described is an alternative to a line of LEDs.
English (United States)
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This is the abbreviated version, containing approximately
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Application of Time Delay Integration to Electrophotographic Printing
A line array of light-emitting diodes (LEDs) has been reported as an
exposure source for a copier-printer. The structure herein described is an
alternative to a line of LEDs.
Line CRTs have been used in many commercial printers as a light source for
photo-sensitive media. However, as higher speeds are sought, the CRT has
difficulty in providing sufficient light in part due to saturation of the phosphor. The
structure shown in the figure is a sample technique for avoiding saturation,
namely, the application of a technique known as "time delay integration" to this
The concept of time delay integration is well known in optical sensing of
images. Basically, a photosensitive charge-coupled diode (CCD) array is used,
which allows the photon flux to be integrated. As the image moves across the
array, the charge generated by the photons is clocked in synchronism, thus
integrating the flux.
The concept suggested here is similar, except that the image is generated on
the face of a CRT, imaged by a lens, and integrated by a standard
photoconductor sheet. All of the structure is clearly shown in the figure. As the
photoconductor moves (at constant velocity owing to the large mass of the
drum), the CRT-generated image moves with it.
It will also be apparent that the principle applies to otherr addressable light
sources, such as electroluminescent displays, provided only that the switching