公开(公告)号：WO2010138296A1

公开(公告)日：2010-12-02

申请号：PCT/US2010/034194

申请日：2010-05-10

Applicant: SYMBOL TECHNOLOGIES, INC. ,  STRAT, Askold, ,  BOEHM, Thomas, ,  LACKEMANN, Tom, ,  PANG, Robert,

Inventor： STRAT, Askold, ,  BOEHM, Thomas, ,  LACKEMANN, Tom, ,  PANG, Robert,

IPC: G06K7/10

CPC classification number: G06K7/10732

Abstract: A method and apparatus for reducing the visual discomfort of the illumination generated by imaging scanners. The method includes (1) turning on a driving current for a illumination source during each of a series of exposure periods to provide illumination directed toward a target object; (2) capturing an image from the target object with photosensitive circuitry during at least one of the exposure periods; and (3) generating a pulse-width-modulation driving current that has a duty cycle changing with time between two consecutive exposure periods for making perceived gradual illumination changes between the two consecutive exposure periods. The duty cycle decreases from the value of 100% to a minimal value after each of the exposure periods and increases from the minimal value to the value of 100% before each of the exposure periods.

Abstract translation: 一种用于减少由成像扫描仪产生的照明的视觉不适的方法和装置。 该方法包括：（1）在一系列曝光周期中的每一个期间接通照明源的驱动电流，以提供朝向目标物体的照明; （2）在至少一个曝光期间内用感光电路从目标物体拍摄图像; 以及（3）产生脉冲宽度调制驱动电流，其具有在两个连续的曝光周期之间随时间变化的占空比，以在两个连续曝光周期之间进行感知的逐渐照明改变。 在每个曝光期之后，占空比从100％的值减少到最小值，并且在每个曝光周期之前从最小值增加到100％的值。

公开(公告)号：CA2111934A1

公开(公告)日：1994-11-15

申请号：CA2111934

申请日：1993-12-20

Applicant: BARD SIMON ,  STRAT ASKOLD ,  DVORKIS PAUL ,  SYMBOL TECHNOLOGIES INC

Inventor： BARD SIMON ,  STRAT ASKOLD ,  DVORKIS PAUL

IPC: G06K7/10 ,  G06K9/22

Abstract: An optical scanner module for directing a light beam to scan an optically encoded symbol includes an optical element mounted for oscillatory motion to scan the light beam in one direction by a flex element capable of torsional flexure. This oscillatory motion is induced by the interacting magnetic fields established by a permanent magnet mounted to the flex element and an electromagnetic coil driven by an AC current. bidirectional light beam scanning is achieved by mounting an assembly of the flex element, optical element and permanent magnet to one or more additional flex elements for oscillatory motion to scan the light beam in a second direction. This oscillatory motion is induced by the inclusion of an additional permanent magnet and/or electromagnetic coil.

公开(公告)号：CA2111934C

公开(公告)日：2005-06-28

申请号：CA2111934

申请日：1993-12-20

Applicant: BARD SIMON ,  STRAT ASKOLD ,  DVORKIS PAUL

Inventor： BARD SIMON ,  STRAT ASKOLD ,  DVORKIS PAUL

IPC: G06K7/10 ,  G06K9/22

Abstract: An optical scanner module for directing a light beam to scan an optically encoded symbol includes an optical element mounted for oscillatory motion to scan the light beam in one direction by a flex element capable of torsional flexure. This oscillatory motion is induced by the interacting magnetic fields established by a permanent magnet mounted to the flex element and an electromagnetic coil driven by an AC currant. Bidirectional light beam scanning is achieved by mounting an assembly of the flex element, optical element and permanent magnet to one or more additional flex elements for oscillatory motion to scan the light beam in a second direction. This oscillatory motion is induced by the inclusion of an additional permanent magnet and/or electromagnetic coil.