초록 ▼

A control system comprises a liquid crystal display panel; a light source; and a light detector. Light from the source is directed through at least a portion of the liquid crystal display panel to the light detector. A control circuit is provided for holding the liquid crystal display in generally o

A control system comprises a liquid crystal display panel; a light source; and a light detector. Light from the source is directed through at least a portion of the liquid crystal display panel to the light detector. A control circuit is provided for holding the liquid crystal display in generally opaque condition while preferably sequentially momentarily clarifying segments of the portion, whereby momentary, sequential, transversely spaced light beams are generated between the light source and the light detector. A timer and logic circuit is provided for correlating signals received from the light detector with generated, individual, spaced light beams that create the signals. Accordingly, occlusion of at least one of the individual light beams with an opaque member causes a specific characteristic response by the timer and logic circuit. In other words, when one of the individual light beams is occluded, the timer and logic circuit emits a characteristic signal which might activate a relay, send an instruction to a microprocessor, or cause some other action.

대표청구항 ▼

A control system which comprises: a liquid crystal panel; light source; light detector means, means for directing light through at least a portion of said liquid crystal panel to said light detector means; control means connected to said detector means and for transiently forming at least one transp

A control system which comprises: a liquid crystal panel; light source; light detector means, means for directing light through at least a portion of said liquid crystal panel to said light detector means; control means connected to said detector means and for transiently forming at least one transparent window in said liquid crystal panel at a position to permit said light to pass from said light source, through said panel, and to said light detector means, the occlusion of light passing through said panel window causing said control means to provide a control signal.