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公开(公告)号：SE340709B
公开(公告)日：1971-11-29
申请号：SE1674266
申请日：1966-12-07
Applicant: IBM
Abstract: 1,143,119. Cathode-ray tube displays. INTERNATIONAL BUSINESS MACHINES CORP 20 Oct., 1966 [29 Dec., 1965], No. 46894/66. Heading H4T. In a cathode-ray tube display arrangement binary coded signals representative of Alpha- Numeric &c. characters and produced by a keyboard 10 (Fig. 1) are converted to corresponding video signals by a composer 12 and to corresponding binary-doded-decimal (BCD) signals by a correcter 13, both sets of signals being stored in a cyclical delay line store 21 synchronously with the operation of the display tube 33, the former during time portions corresponding to vertical trace intervals and the latter during time portions corresponding to vertical re-trace intervals. The characters produced may then be verified visually by the operator and after any necessary correction the application of a (positive) pulse to read line 50 supplies the equivalent binary-coded-decimal signals to a load device 42 which may be a data processing system. The delay line 21 stores a complete field of video and BCD signals and in the display each character is allotted a matrix of 6 (wide) by 8 (high) charac - ter bits of which 5 by 7 are utilized for video production whilst the extra bits are employed for horizontal and vertical spacing giving a total of 8 lines each containing 18 characters (Figs. 2 to 7, not shown). In practice; the delay line comprises two delay line elements (Fig. 8, not shown) which receive the odd and even numbered bits respectively, the outputs being fed back to the inputs for recirculation until the feed-back path is interrupted by manually operated switch means when a new set of characters is to be entered into the system. The output of the timing control circuit 54 (described in detail in connection with Fig. 9, not shown) comprising horizontal and vertical synchronizing signals may be combined with video signals from the delay line and fed to the video amplifier of a conventional television receiver used as the display means.
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公开(公告)号：SE340710B
公开(公告)日：1971-11-29
申请号：SE1792166
申请日：1966-12-29
Applicant: IBM
Abstract: 1,143,119. Cathode-ray tube displays. INTERNATIONAL BUSINESS MACHINES CORP 20 Oct., 1966 [29 Dec., 1965], No. 46894/66. Heading H4T. In a cathode-ray tube display arrangement binary coded signals representative of Alpha- Numeric &c. characters and produced by a keyboard 10 (Fig. 1) are converted to corresponding video signals by a composer 12 and to corresponding binary-doded-decimal (BCD) signals by a correcter 13, both sets of signals being stored in a cyclical delay line store 21 synchronously with the operation of the display tube 33, the former during time portions corresponding to vertical trace intervals and the latter during time portions corresponding to vertical re-trace intervals. The characters produced may then be verified visually by the operator and after any necessary correction the application of a (positive) pulse to read line 50 supplies the equivalent binary-coded-decimal signals to a load device 42 which may be a data processing system. The delay line 21 stores a complete field of video and BCD signals and in the display each character is allotted a matrix of 6 (wide) by 8 (high) charac - ter bits of which 5 by 7 are utilized for video production whilst the extra bits are employed for horizontal and vertical spacing giving a total of 8 lines each containing 18 characters (Figs. 2 to 7, not shown). In practice; the delay line comprises two delay line elements (Fig. 8, not shown) which receive the odd and even numbered bits respectively, the outputs being fed back to the inputs for recirculation until the feed-back path is interrupted by manually operated switch means when a new set of characters is to be entered into the system. The output of the timing control circuit 54 (described in detail in connection with Fig. 9, not shown) comprising horizontal and vertical synchronizing signals may be combined with video signals from the delay line and fed to the video amplifier of a conventional television receiver used as the display means.
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