Amoled Sarımtırak Ekran ve Nedenleri(Mutlaka okuyun!) (2. sayfa)

Guest-A21AA1D72 · 2013-04-12T00:23:27.0000000+03:00

Arkadaşlar konuya yazdım pek tatmin edici bir yanıt alamadım bugün satürn, teknosa ve samsung bayilerinde incelediğim toplam 4 adet note 2 ile yeni aldığım note 2 cihazı karşılaştırdığımda beyaz zeminde benim cihazın ekranı beyaz iken diğerleri bariz şekilde sarıydı şimdi bu yazılımsal bir durummu? ekran üretimleri her cihaz için farklı mı? yada en kötüsü belirli bir süre geçtikten sonra note 2 de kullanılan süper amoled ekranlar sararma mı yapıyor? tecrübe ve görüşlerinizi paylaşırsanız memnun olurum.

Sıcak Fırsatlarda Tıklananlar

Editörün Seçtiği Fırsatlar

Daha Fazla

Bu Konudaki Kullanıcılar: Daha Az

2 Misafir - 2 Masaüstü

5 sn

43
Cevap

1
Favori

28.731
Tıklama

Daha Fazla
İstatistik

Konu İstatistikleri Yükleniyor

Konuya Özel

0 oy

Öne Çıkar

Cevapla

Sayfa:

önceki 1 2 3

Giriş

Mesaj

quote:

Orijinalden alıntı: Guest-A21AA1D72

quote:

Orijinalden alıntı: psyshock

teknosa da gördüğün çok uzun süre açık kalmıştır amoledin en büyük sorun ömrüdür erken tükenir renkler çünkü pixeller kendini aydınlatır ve zamanla güç kaybeder sarı olan note 2 belki aylardır hiç kapanmadan çalışıyordur ondan olabilir. teşhir ürünlerini yıpranma derecesi 4-5 ayda normal bir kullancının 2-3 yıllık kullanımına denk gelebilir. tabi sadece hatalı üretimde olabilir.

senden sonra detaylı bir araştırma yaptım amoled ekranlarda kullanılan organik ledler zamanla okside oluyor ve bu sebeple en başta mavi renk ömrünü yitiriyor bu süre yaklaşık 7 yıl kadar ancak yarılanma ömrünü düşünecek olursak beyazların neden sarardığını anlamak pekte güç değil zira demo cihazlar seninde dediğin gibi bu süreyi çok daha kısaltıyorlar.ekran ömrünü nispeten uzatmanın en iyi yolu siyah ağırlıklı tema ve duvar kağıdı kullanmak aksi halde amoledler kısa sürede burn in denen olayla karşılaşıyor ve renkler soluklaşıyor!

*Lifespan: The biggest technical problem for OLEDs was the limited lifetime of the organic materials.[56] In particular, blue OLEDs historically have had a lifetime of around 14,000 hours to half original brightness (five years at 8 hours a day) when used for flat-panel displays. This is lower than the typical lifetime of LCD, LED or PDP technology—each currently rated for about 60,000 hours to half brightness, depending on manufacturer and model. However, some manufacturers' displays aim to increase the lifespan of OLED displays, pushing their expected life past that of LCD displays by improving light outcoupling, thus achieving the same brightness at a lower drive current.[57][58] In 2007, experimental OLEDs were created which can sustain 400 cd/m2 of luminance for over 198,000 hours for green OLEDs and 62,000 hours for blue OLEDs.[59]

*Color balance issues: Additionally, as the OLED material used to produce blue light degrades significantly more rapidly than the materials that produce other colors, blue light output will decrease relative to the other colors of light. This differential color output change will change the color balance of the display and is much more noticeable than a decrease in overall luminance.[60] This can be partially avoided by adjusting colour balance but this may require advanced control circuits and interaction with the user, which is unacceptable for some users. In order to delay the problem, manufacturers bias the colour balance towards blue so that the display initially has an artificially blue tint, leading to complaints of artificial-looking, over-saturated colors. More commonly, though, manufacturers optimize the size of the R, G and B subpixels to reduce the current density through the subpixel in order to equalize lifetime at luminance. For example, a blue subpixel may be 100% larger than the green subpixel. The red subpixel may be 10% smaller than the green.

*Efficiency of blue OLEDs: Improvements to the efficiency and lifetime of blue OLED’s is vital to the success of OLED’s as replacements for LCD technology. Considerable research has been invested in developing blue OLEDs with high external quantum efficiency as well as a deeper blue color.[61][62] External quantum efficiency values of 20% and 19% have been reported for red (625 nm) and green (530 nm) diodes, respectively.[63][64] However, blue diodes (430 nm) have only been able to achieve maximum external quantum efficiencies in the range between 4% to 6%.[65] This is primarily due to two factors. Firstly, the human eye is less sensitive to the blue wavelength compared to the green or red, so lower efficiency is expected. Secondly, by calculating the band gap (Eg = hc/λ), it is clear that the shorter wavelength of the blue OLED results in a larger band gap at 2.9 eV. This leads to higher barriers, so less efficiency is also expected.

*Water damage: Water can damage the organic materials of the displays. Therefore, improved sealing processes are important for practical manufacturing. Water damage may especially limit the longevity of more flexible displays.[66]

*Outdoor performance: As an emissive display technology, OLEDs rely completely upon converting electricity to light, unlike most LCDs which are to some extent reflective; e-ink leads the way in efficiency with ~ 33% ambient light reflectivity, enabling the display to be used without any internal light source. The metallic cathode in an OLED acts as a mirror, with reflectance approaching 80%, leading to poor readability in bright ambient light such as outdoors. However, with the proper application of a circular polarizer and anti-reflective coatings, the diffuse reflectance can be reduced to less than 0.1%. With 10,000 fc incident illumination (typical test condition for simulating outdoor illumination), that yields an approximate photopic contrast of 5:1.

*Power consumption: While an OLED will consume around 40% of the power of an LCD displaying an image which is primarily black, for the majority of images it will consume 60–80% of the power of an LCD - however it can use over three times as much power to display an image with a white background[67] such as a document or website. This can lead to disappointing real-world battery life in mobile devices.

*Screen burn-in: Unlike displays with a common light source, the brightness of each OLED pixel fades depending on the content displayed. The varied lifespan of the organic dyes can cause a discrepancy between red, green, and blue intensity. This leads to image persistence, also known as burn-in.[68]

Alıntıları Göster

Bazen firmalar parça tedarik ederken farklı markaları kullanıyorlar yada fabrikadan fabrikaya kullanılan malzemeler değişebiliyor. Bu yüzden bazen ekran renkleri üretim yerine, tarihine göre farklılık gösterebiliyor. Bunu anlamak için illaki sizin yaptığınız gibi cihazları yan yana getirmek gerekli yoksa pek anlaşılmıyor.