Electric lamp and discharge devices: systems – Plural power supplies – Plural cathode and/or anode load device
Patent
1988-06-08
1990-05-29
Griffin, Robert L.
Electric lamp and discharge devices: systems
Plural power supplies
Plural cathode and/or anode load device
3151692, 340781, 340776, 340795, H01Q 1914, G09G 330
Patent
active
049298704
ABSTRACT:
The present publication describes a method for the transmission of control signals to the row drive circuits in the control of thin-film electro-luminescent displays. According to the method, as control signals are used, a data signal, a clock signal, a signal that activates all the input stages of the row drive circuits at the same time, i.e., a strobe signal, and two signals by means of which the drive circuits controlling either odd rows or even rows are chosen to be activated (odd row enable and even row enable). According to the invention, all the control signals are transmitted via one first line (A) and one second line (B), whereby the timings of the pulses on the first line (A) and on the second line (B) are chosen so that the signal of the first line (A) is a combined odd (or even) row enable and data signal and the signal of the second line (B) is a combined even (or odd) row enable and clock signal. The strobe signal is formed by means of one logic gate out of the signals of the first line (A) and of the second line (B). By means of the invention, the testing of the row drive circuits becomes easier, because their logic part can be tested relative the system ground without switching on high voltages.
REFERENCES:
patent: 3761768 (1973-09-01), Schmersal
patent: 3842259 (1974-10-01), Bruning
patent: 3911421 (1975-10-01), Alt et al.
patent: 4346378 (1982-08-01), Shanks
Display Driver Handbook, Texas Instruments, 1984, "The AC Thin Film Electroluminescent Display", pp. 2.42-2.49, 3.65-3.67.
Griffin Robert L.
Salindong T.
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