IMAGE FORMATION APPARATUS

• Main Authors: YOKOTA SOTARO, WATANABE YOSHIKAZU, YANO TAKESHI
• Format: Patent
• Language: English; Japanese
• Published: 22.11.2018
• Subjects: BASIC ELECTRIC ELEMENTS; CINEMATOGRAPHY; CORRECTION OF TYPOGRAPHICAL ERRORS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; LINING MACHINES; MAGNETOGRAPHY; PERFORMING OPERATIONS; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; PRINTING; SELECTIVE PRINTING MECHANISMS; SEMICONDUCTOR DEVICES; STAMPS; TRANSPORTING; TYPEWRITERS

PROBLEM TO BE SOLVED: To provide an image formation apparatus which can make image degradation due to the AC noise difficult to be visually recognized.SOLUTION: In an image formation apparatus, a photoreceptor drum rotating at a peripheral velocity V is exposed by an optical writing device in which a plurality of OLEDs are arranged in a staggered manner, the optical writing device is under the influence of the AC noise of the frequency F, an interval L between OLED rows arrayed along the main-scanning direction out of the plurality of OLEDs arranged in a staggered manner satisfies the following formula (1) for a certain odd number D. With this configuration, the density unevenness due to the AC noise can be made difficult to be visually recognized since the phases of the light amount fluctuations due to the AC noise become mutually reverse phases at adjacent exposure points on the scan line.SELECTED DRAWING: Figure 5 【課題】ＡＣノイズに起因する画像劣化を視認し難くすることができる画像形成装置を提供する。【解決手段】周速度Ｖで回転する感光体ドラムを画像形成装置において、複数のＯＬＥＤを千鳥配列した光書き込み装置で露光する。光書き込み装置は周波数ＦのＡＣノイズの影響下にある。千鳥配列された複数のＯＬＥＤのうち主走査方向に沿って並ぶＯＬＥＤ列どうしの間隔Ｌは、ある奇数Ｄについて、下式（１）を満たす。このようにすれば、走査線上で隣り合う露光点どうしで、ＡＣノイズに起因する光量変動の位相が互いに逆位相になるので、ＡＣノイズに起因する濃度ムラを視認し難くすることができる。【選択図】図５