LIQUID CRYSTAL DISPLAY DEVICE AND METHOD OF DRIVING THE SAME

PROBLEM TO BE SOLVED: To minimize deterioration of uniformity of a display image due to variations in a threshold voltage of a source follower transistor in a pixel.SOLUTION: When Rmax denotes a maximum value of a reference lamp voltage, Rmin denotes a minimum value, input video data are N bits, and...

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1. Verfasser:	ITO HIROTOMO
Format:	Patent
Sprache:	eng
Schlagworte:	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
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To minimize deterioration of uniformity of a display image due to variations in a threshold voltage of a source follower transistor in a pixel.SOLUTION: When Rmax denotes a maximum value of a reference lamp voltage, Rmin denotes a minimum value, input video data are N bits, and Vcor is for every pixel and denotes an intermediate potential between a difference Xn in an average value Vap of positive electrode side voltages of all pixels and a difference Yn in an average value Vam of the negative electrode side voltages of all pixels, a correction gradation calculation part calculates a correction gradation Dcor of every pixel by using formula: Dcor=Vcor/{(Rmax-Rmin)/2}-α×\|{(Vap-Vam)/2}-Vcor\| (where "α" represents a coefficient). As a result, the driving voltage of pixels B, C, D is reduced by each of (b3+b4), (c3+c4) and (d3+d4), each of which is a correction voltage shown in a second term of the right side in the above formula.