Mätning av LCD-bildskärmars responstid och latens : Measurement of LCD displays response time and input lag

التفاصيل البيبلوغرافية
العنوان:	Mätning av LCD-bildskärmars responstid och latens : Measurement of LCD displays response time and input lag
بيانات النشر:	Institutionen för fysik och elektroteknik (IFE) 2013
تفاصيل مُضافة:	Mikkelsen, Markus Svanfors, Gustav
نوع الوثيقة:	Electronic Resource
مستخلص:	Examensarbetet har utförts i samarbete med företaget LVI (Low Vision International) som tillverkar elektroniska hjälpmedel för synskadade. LVI utvärderar vid jämna mellanrum nya LCD-bildskärmar för deras produkter. LVI behöver metoder samt utrustning för att mäta bildskärmars responstid och latens. Både responstiden och latensen ger fördröjningar vilket t.ex. leder till att bilden blir oskarp, rörliga föremål får en svans efter sig eller att lju- det kommer före bilden. I detta arbete utförs en grundlig förstudie som behandlar bild- skärmars responstid och latens samt ger ett underlag för att konstruera eller köpa mätut- rustning för responstidsmätningar. I förstudien framkommer den standardiserade mätmeto- den ”grey-to-grey” som LVI kan använda för att mäta responstiden. En mätkrets konstrue- ras för att mäta responstiden samt beställs en dedikerad enhet för latensmätning. För att ut- värdera mätmetoderna utförs ett antal tester med mätkretsen för responstid och den dedike- rade enheten för mätning av latens. Mätningarna visar senare att mätmetoden ”grey-to- grey” är den som LVI ska använda men metoden behöver vidareutvecklas. Den dedikerade enheten för latensmätningar visar sig mäta en del av responstiden och bör därför endast an- vändas som komplement till responstidsmätningen vid jämförelser mellan olika bildskär- mar. Arbetet levererar en förstudie i LCD-bildskärmars responstid och latens, en vidareut- vecklad version av ”grey-to-grey”-metoden, mätutrustning för responstidsmätning samt den dedikerade mätenheten för latens till företaget LVI. The thesis was performed in collaboration with the company LVI (Low Vision Interna- tional) that manufactures electronic devices for the visually impaired. LVI evaluates new LCD displays for their products at regular intervals. LVI need methods and equipment for measuring response time and input lag. Both response time and input lag cause delays, which results in such things as image blur, ghosting after moving objects or a delay between sound and image. The preliminary study reveals the standardized method “grey- to-grey” that LVI can use to measure response time. A measurement circuit was constructed to measure response time and a dedicated unit for input lag measurement was ordered. To evaluate the measurement methods a number of tests were conducted with the response time circuit and the dedicated input lag unit. The measurements showed that the method LVI shall use is the "grey-to-grey” method but it needs further development. It turned out that the dedicated unit for input lag measured a portion of the response time and should therefore only be used as a complement to the response time measurement when comparing displays. The thesis delivers a preliminary study in LCD displays response times and input lag, a further developed version of the “grey-to-grey” method, measurement equipment for response time and a dedicated unit for input lag measurements to the company LVI.
مصطلحات الفهرس:	LCD, Display, Response time, Input lag, RTC, Grey-to-grey, Black-white- black, CRT, Photodiode, Phototransistor, Photoresistor, Light, Greyscale, Pixel, RGB, Bildskärm, Responstid, Latens, Svart-vit-svart, Mätning, Fotodiod, Fototransistor, Fotoresistor, Ljus, Gråskalor, Other Electrical Engineering, Electronic Engineering, Information Engineering, Annan elektroteknik och elektronik, Student thesis, info:eu-repo/semantics/bachelorThesis, text
URL:	http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-26555
الإتاحة:	Open access content. Open access content info:eu-repo/semantics/openAccess
ملاحظة:	application/pdf Swedish
أرقام أخرى:	UPE oai:DiVA.org:lnu-26555 1234867079
المصدر المساهم:	UPPSALA UNIV LIBR From OAIster®, provided by the OCLC Cooperative.
رقم الأكسشن:	edsoai.on1234867079
قاعدة البيانات:	OAIster

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