Drive voltage regulator drive voltage adjustment method of a liquid crystal display device, driving device for a liquid crystal display panel, liquid crystal display device, a liquid crystal display device, and electronic equipment

摘要

PROBLEM TO BE SOLVED: To provide a method of adjusting a drive voltage of a liquid crystal display device wherein a DC component of a voltage impressed on a liquid crystal layer can be made to almost zero by a simple adjusting method, even when an electrical charge and discharge drive method is used as a driving method of a liquid-crystal display panel using two terminal type nonlinear element of a MIM drive element, etc. ;SOLUTION: When a test signal is inputted, a display screen of a liquid- crystal display panel 10 is split into halves, and a scanning signal is composed of the charge mode signal in the upper half, while the scanning signal is composed of the discharge mode signal in the lower half. And, in the center part of the display screen, a difference of the brightness between both regions is measured with a luminance meter, and Drive voltages V1 and V2 are adjusted so that the difference of the brightness between both regions may disappear according to the measurement result.;COPYRIGHT: (C)1999,JPO