| 摘要 |
PURPOSE: A virtual display system is provided to be capable of displaying logo, character and symbol with predetermined language or format shape even without having screen or board shape and of enabling a portable size. CONSTITUTION: An external control input signal part(100) consists of a direction sensing part(7), up/down switch parts(4,5), a 64word/128word display signal and auto program changing signal part(9). A serial/parallel data exchange interface(300) receives data from the external control input signal part(100) and exchanges data with the an external memory block(200). A control circuit part(400) consists of an auto program change controller(40), a display controller(41), an internal RAM data output(42), an LED latch controller(43) and a display variable frequency controller(44). The auto program change controller(40) exchanges data with the serial/parallel data exchange interface(300). An internal RAM block(500) processes data from the serial/parallel data exchange interface(300) and the control circuit part(400). An LED driver(600) is operated by the signal from the RAM block(500). An LED array(8) is lightened by the signal from the LED driver(600).
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