Active matrix display device

To restrain decrease of display quality because of increases in flicker level and decrease of uniformity in screen luminance caused by increases in the overcharging effect when an amorphous metal oxide semiconductor or an organic semiconductor that has an field-effect mobility greater than amorphous...

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Bibliographische Detailangaben
1. Verfasser:	KAWANO HIDEO
Format:	Patent
Sprache:	eng
Schlagworte:	ADVERTISING ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION BASIC ELECTRIC ELEMENTS 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 ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY FREQUENCY-CHANGING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SEALS SEMICONDUCTOR DEVICES TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	To restrain decrease of display quality because of increases in flicker level and decrease of uniformity in screen luminance caused by increases in the overcharging effect when an amorphous metal oxide semiconductor or an organic semiconductor that has an field-effect mobility greater than amorphous silicon is used for pixel TFTs in a liquid crystal display device or organic EL display device. A new relational formula is derived for punch-through voltage in gray scale display, where the visibility of flicker, screen burn-in, and the like is high, and in-plane differential in counter electrode potential, which are an index of the overcharging effect. A design is made so as to satisfy conditions for decreasing the in-plane differential in counter electrode potential that have been newly derived on the basis of this formula to an allowable limit value or less.