DRIVING CIRCUIT FOR MATRIX CIRCUIT AND CLOCK FORMING DEVICE FOR CONTROLLING ITS DRIVING CIRCUIT

• Main Authors: KABUTO NOBUAKI, IGARASHI MAYUMI
• Format: Patent
• Language: English
• Published: 21.08.1990
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CRYPTOGRAPHY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DISPLAY; EDUCATION; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; SEALS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PURPOSE:To arbitrarily set the selection period of a matrix circuit irrespective of a period of a clock signal by inputting clock signals whose phases only are different to a first and a second shift registers, respectively, and supplying plural signals outputted from a level shifter to the first and the second electrode groups of the matrix circuit as driving signals, respectively. CONSTITUTION:In the first or the second shift register 1, 2, a clock signal for determining a selection start timing in the selection period of a matrix circuit, and a clock signal for determining a selection end timing in the same selection period are inputted to one of them and the other, respectively. Also, plural logic circuits 3 execute the logical operation of outputs of the shift registers 1, 2, and a level shifter 4 converts the voltage levels of each signal outputted from each logic circuit 3, respectively. Accordingly, the pulse width of a driving signal outputted from the level shifter 4 can be set freely by changing the phase of the clock signal inputted to the shift registers 1, 2. In such a manner, the selection period of the matrix circuit can be arbitrarily set.