최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
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-0262785 (1994-06-20) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 246 인용 특허 : 0 |
The optical scanner has an optical scanning head with LED light sources, focusing and receiving optics and a CCD detector array all mounted on a printed circuit board. This assembly, along with a storage buffer and a decoder is contained within a small housing which is attached on its lower side to
The optical scanner has an optical scanning head with LED light sources, focusing and receiving optics and a CCD detector array all mounted on a printed circuit board. This assembly, along with a storage buffer and a decoder is contained within a small housing which is attached on its lower side to a semi-glove which the user can wear on the back of his or her hand. The automatic sensing feature of the invention provides hands-free operation by automatically and periodically testing for the presence of a bar code in the scanner\s field of view. If the presence of a bar code is detected, the scanner is placed in active mode. When the scanner is not in use, the scanner is powered down to conserve energy.
An optical scanner for scanning a bar code, the scanner comprising: an optical scanning head having an LED light source, an optical assembly, and a detector, said detector generating a signal representative of modulated light reflected from a surface within a field of view of the scanner; a power su
An optical scanner for scanning a bar code, the scanner comprising: an optical scanning head having an LED light source, an optical assembly, and a detector, said detector generating a signal representative of modulated light reflected from a surface within a field of view of the scanner; a power supply; a decoder having a preliminary testing portion and a decoding algorithm portion for receiving and processing said signal; a timing controller for controlling application of power from said power supply to said optical scanning head and said decoder, said timing controller providing a scan command during an inactive mode of the scanner so that power is periodically provided to said optical scanning head to scan said surface within the field of view and to said preliminary testing portion of said decoder to conduct comparisons of said signal to a threshold, the threshold being a minimum number of transitions indicative of said bar code, so that when said minimum number of transitions is found, said scanner enters an active mode for processing said signal within said decoding algorithm portion of said decoder to generate a decoded output, and so that when said minimum number of transitions is not found, said scanner remains in said active mode; wherein said scan command comprises a test sequence of distinct scan periods, each scan period having a different scan duration from other scan periods of said test sequence, said test sequence terminating when a good exposure is achieved.
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