Automatic focussing camera possible for manual focussing
专利汇可以提供Automatic focussing camera possible for manual focussing专利检索，专利查询，专利分析的服务。并且PURPOSE:To achieve an automatic focussing camera made possible for manual focussing without losing functions of the automatic focussing camera, by selecting a virtual signal through a manual operation according to the result of discrimination of a focussing detection signal, and controlling an objective lens drive motor. CONSTITUTION:When detection signals such as unmatched front focus, in focus and unmatched rear focus, which are outputted from a focus detecting circuit 3 and controls a motor 7 driving an objective lens 1 with feedback, are out of the detection range and a discrimination circuit 4 judges the signals as unreliable, this is displayed on a display device 9 with a discriminated output outputted at a terminal 4d. This discriminated output is applied to a signal selection circuit 5 at the same time, and manual focussing can be made by controlling the motor 7 through the selection of a virtual signal outputted from a virtual signal circuit 8 in response to the manual operation by switches K1, K2 while observing the finder eye sight via AND gates A4-A6. Similarly, when the discrimination signal is judged as reliable, the operation is switched to automatic focussing automatically, allowing to achieve automatic focussing cameras made possible for manual focussing without losing the functions of automatic focussing camera.，下面是Automatic focussing camera possible for manual focussing专利的具体信息内容。
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