发明名称 |
Sampled video signal generating device for improving deviation based on difference of circuit characteristics among channels. |
摘要 |
<p>An improved video signal processing circuit (63) in the high quality television system for alternating-current driving a liquid crystal module (64) is disclosed. A reference signal is inserted into vertical blanking periods of a R signal by a reference signal generator (20) and switching circuit (4). The R signal in which the reference signal is inserted is converted into digital signals of n channels by an A/D converter (6). There exists difference in circuit characteristics among signal processing circuits for processing the respective digital signals. However, the signals signal-processed for each channel are supplied to microcomputer 21 through switching circuits (181-18n). Since the microcomputer 21 controls full scale level and offset level of D/A converters 91-9n and adders 111-11n, the deviations produced among sampled video signals due to difference in circuit characteristics among channels can be reduced.</p> |
申请公布号 |
EP0421428(A2) |
申请公布日期 |
1991.04.10 |
申请号 |
EP19900119063 |
申请日期 |
1990.10.04 |
申请人 |
SHARP KABUSHIKI KAISHA |
发明人 |
HIRAMATSU, YONEJIRO;SHIBAZAKI, SHIGERU;SAKATSUJI, OSAMU;SUDOH, SEIJI |
分类号 |
G09G3/36;H04N5/18;H04N9/72 |
主分类号 |
G09G3/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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