| 摘要 |
<p>1476735 Matrix displays and circuitry therefor FUJITSU Ltd 16 July 1974 [16 July 1973 23 July 1973] 31526/74 Heading G5C A display system comprises a self scan gas discharge panel with crossed conductor arrays and drive circuitry including N shift buses A, B, C, D each connected sequentially to every Nth electrode a, b, c of one array; shift controlling means to apply a first periodic signal V A cyclically to the shift buses; a further bus connected to the electrodes y of the second array, discharge control means to apply to the further bus Y a second periodic pulsed voltage V Y of larger amplitude; the voltages V A and V Y being such that the resultant V CL causes the discharge to shift and erases wall charge V Q at the site of each cell from which a discharge is shifted. The shift control means comprise a plurality of low speed switches Qa...Qd connected to the buses and driven by a further switch Q S and the output of the shift register 4. By making the voltages on the write and shift arrays w, a, b, c relatively low, transistor switches with a low voltage rating can be used in the write and shift drive circuitry 8, 11. The pulses V YS on the Y array are provided by transistors Qy 1 , Qy 2 forming the discharge control means 7, 12. When these are off a potential of about ¢ V YS is applied via resistors R1, R2. Using high and low speed transistors pulse trains V A ...V D with mitral and final pulses of reduced magnitude can be obtained Fig. 7 (not shown). The high speed transistors may be used to drive the low speed transistors of several display panels.</p> |
