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다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0507607 (1995-07-25) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 272 인용 특허 : 0 |
An extended working range dataform reader with reduced power consumption having a camera assembly and a circuit control board including game control circuitry and exposure control circuitry configured to set an initial gain value and an initial exposure period, respectively, resulting from a previou
An extended working range dataform reader with reduced power consumption having a camera assembly and a circuit control board including game control circuitry and exposure control circuitry configured to set an initial gain value and an initial exposure period, respectively, resulting from a previous dataform reading session. Subsequent fields of image data are captured by the camera which are used to correct the gain and exposure relative to the initial values for gain and exposure period, thereby reducing the latency period for realizing correct values and reducing power consumption during power up. Furthermore, the gain control system and the exposure control system each utilize an open loop feedback such that successive fields of image data captured by the camera are utilized to calculate correct values, thereby reducing the latency time for realizing a correct value. Additionally, a reader module is provide for use in a dataform reader that emulates a laser module such that the dataform reader module can be readily integrated into existing laser-based dataform reading systems. Preferably, laser model emulation circuitry included in the dataform reader module emulates output of a laser scan module and a control circuit board in which the emulation circuitry is realized has an output port constructed and arranged to communicate with devices configured for use with a laser scanner.
[ We claim:] [15.] A two dimensional imaging based dataform reader module configured for use in a dataform reader, the reader module comprising:a camera assembly including an image sensor configured to detect a reflected image of an illuminated region including a dataform;an illumination module conf
[ We claim:] [15.] A two dimensional imaging based dataform reader module configured for use in a dataform reader, the reader module comprising:a camera assembly including an image sensor configured to detect a reflected image of an illuminated region including a dataform;an illumination module configured to illuminate a dataform to be detected by the camera assembly;a control board including a microprocessor to which the camera assembly and illumination module are operatively coupled;gain control circuitry realized on the control board, the gain control circuitry comprising an open loop gain control system configured to set a gain value to a gain setting used during a previous dataform reading session in response to power up and incrementally adjust the gain value after evaluation of image data to achieve a gain corrected video signal within a short latency period; andimage processing circuitry operative to decode the detected dataform image.
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