Drive circuit and liquid crystal display device

• Main Authors: TSUCHI HIROSHI, UCHIYAMA YOSHITADA
• Format: Patent
• Language: Chinese; English
• Published: 14.10.2009
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; BASIC ELECTRONIC CIRCUITRY; 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; ELECTRICITY; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; PULSE TECHNIQUE; SEALS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

Disclosed is a driver circuit, as well as a LCD device having the driver circuit, in which changeover between first and second buffer circuits the operating ranges of which extend to high- and low-potential power supply voltages can be performed reliably within the drive changeover range. The driver circuit includes first and second buffer circuits(13 and 14) having their input terminals connected in common with one input terminal(1) to which an input signal voltage(Vin) is input and having their output terminals connected in common with an output terminal(2), the first and second buffer circuits having operating ranges that extend to high- and low-potential power supply voltages, respectively; first and second storage units(3a and 3b) for storing respectively positive- and negative-polarity reference data, which correspond to voltages within a range in which both of the first and second buffer circuits(13 and 14) are operable, with regard to each of a standard state and modulated state of a gamma characteris