Claims
- 1. A printer for printing a desired print pattern on print regions of the paper having non-print region, comprising:
- a light source;
- control means including a plurality of optical switch elements for controlling selectively the quantity of transmission light between opposed electrodes with respect to incident light from said light source, by interposing a ferroelectric liquid crystal material between the opposed electrodes of each of said plurality of optical switch elements, and for applying a positive or negative voltage between the opposed electrodes of each of said plurality of optical switch elements selectively during a first period so as to control the quantity of transmission light between the opposed electrodes, and for effecting a short-circuit by simultaneously applying a substantially zero voltage between the opposed electrodes of all of said plurality of optical switch elements during a second period so as to reduce the quantity of non-uniform existence of ions in the ferroelectric liquid crystal material between the opposed electrodes; and
- a photosensitive drum to which the transmission light of said plurality of optical switch elements is radiated;
- wherein the second period is a period at least one of before and after the first period, the second period being a shorter time than the first period, the second period in which the substantially zero voltage is applied simultaneously between the opposed electrodes of all of said plurality of optical switch elements corresponding to at least one of the non-print regions at the leading and trailing end portions of the paper along the non-print regions of the paper.
- 2. The printer according to claim 1, wherein said control means effects the short-circuit by connecting electrically the opposed electrodes.
Priority Claims (1)
Number |
Date |
Country |
Kind |
59-138786 |
Jul 1984 |
JPX |
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Parent Case Info
This is a division application of Ser. No. 751,847, filed July 5, 1985, now U.S. Pat. No. 4,712,876.
US Referenced Citations (6)
Divisions (1)
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Number |
Date |
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Parent |
751847 |
Jul 1985 |
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