OPTICAL WRITING DEVICE AND IMAGE FORMATION APPARATUS

• Main Authors: YOKOTA SOTARO, WATANABE YOSHIKAZU, YANO TAKESHI
• Format: Patent
• Language: English; Japanese
• Published: 12.04.2018
• Subjects: CINEMATOGRAPHY; CORRECTION OF TYPOGRAPHICAL ERRORS; ELECTRIC COMMUNICATION TECHNIQUE; 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; STAMPS; TRANSPORTING; TYPEWRITERS

PROBLEM TO BE SOLVED: To provide an optical writing device and image formation apparatus which prevent image degradation by suppressing light amount unevenness of an OLED due to AC noise.SOLUTION: In an OLED panel 200 which inputs a DAC signal output by a DAC 440 to a light emission block 410 via DAC wiring 401, an antenna 400 is extended along an extension direction of the DAC wiring 401 and noise voltage due to AC noise is detected. A correction value creation unit 460 creates a correction value of a DAC value in accordance with the detected noise voltage. The DAC 440 reads the DAC value for causing the OLED 201 to emit light in a desired light amount in a state where there is no AC noise from a memory unit 450, corrects the DAC value by using the correction value read from the correction value creation unit 460 and then outputs the DAC signal obtained by performing DA conversion on the corrected DAC value. With this configuration, light amount unevenness due to the AC noise can be prevented.SELECTED DRAWING: Figure 4 【課題】ＡＣノイズに起因するＯＬＥＤの光量むらを抑制して画像劣化を防止する光書き込み装置及び画像形成装置を提供する。【解決手段】ＤＡＣ４４０が出力するＤＡＣ信号をＤＡＣ配線４０１を経由して発光ブロック４１０に入力するＯＬＥＤパネル２００において、ＤＡＣ配線４０１の延設方向に沿ってアンテナ４００を延設して、ＡＣノイズに起因するノイズ電圧を検出する。補正値作成部４６０は検出されたノイズ電圧に応じてＤＡＣ値の補正値を作成する。ＤＡＣ４４０は、ＡＣノイズが無い状態でＯＬＥＤ２０１に所望の光量を出射させるためのＤＡＣ値をメモリ部４５０から読み出して、補正値作成部４６０から読み出した補正値を用いてＤＡＣ値を補正した後、補正後のＤＡＣ値をＤＡ変換したＤＡＣ信号を出力する。このようにすれば、ＡＣノイズに起因する光量むらを防止することができる。【選択図】図４