29-11-2021, 01:35 PM
(This post was last modified: 29-11-2021, 01:36 PM by Mike Watterson.)
Except OLED uses phosphors, so colour may shift with age. The emissive spots are diode-like, emit light and are semiconductors, but are more like electroluminescent sources. They are not real LEDs. Sony does make some monitors and TVs with real LEDs, called Crystal LED. Not cheap.
Unless you are in a blacked out room with matt-black walls the current LCD screens have sufficiently black blacks (IPS?). Even in total darkness with our white walls the 48" 4K HDR LCD (few years old Sony) and the 42" HD LCD (older Toshiba) we have has acceptably black blacks. Mostly the DVD or BD "blacks" are not fully black.
I've seen a Plasma, once near the end of Plasma sales, in Harvey Normal described as HD Ready which could take 1920x1080 HDMI but was natively 480 lines.
I decided long ago that HD Ready just meant you could feed 1920x1080 in the HDMI and it might display. Recently they are describing sets (TVs, Monitors, Laptops) with less than 1080 lines native as HD and now you need to look for Full HD. No resolution quoted at all on most TVs, Monitors, Tablets, Phones & laptops now in local retail.
Also 2008 to 2012 (DTT trial period) and then after 2012 (Analogue switch off) the Retailers in Ireland were selling sets that would never work on Irish DTT. They ALL excused it by saying most people watch UPC/Virgin cable or Sky satellite via set-box. Should have labelled them as monitors. From the start Irish DTT was Mpeg4 for all channels, even SD with MHEG5 interactive like UK (unfortunately instead of European mainland), but DVB-T, no DVB-T2.
They were also still selling (dumping?) older models made for UK with no DTT tuner, just Analogue, after 2008. We surveyed twice.
Consumer protection is not well enforced here.
Unless you are in a blacked out room with matt-black walls the current LCD screens have sufficiently black blacks (IPS?). Even in total darkness with our white walls the 48" 4K HDR LCD (few years old Sony) and the 42" HD LCD (older Toshiba) we have has acceptably black blacks. Mostly the DVD or BD "blacks" are not fully black.
I've seen a Plasma, once near the end of Plasma sales, in Harvey Normal described as HD Ready which could take 1920x1080 HDMI but was natively 480 lines.
I decided long ago that HD Ready just meant you could feed 1920x1080 in the HDMI and it might display. Recently they are describing sets (TVs, Monitors, Laptops) with less than 1080 lines native as HD and now you need to look for Full HD. No resolution quoted at all on most TVs, Monitors, Tablets, Phones & laptops now in local retail.
Also 2008 to 2012 (DTT trial period) and then after 2012 (Analogue switch off) the Retailers in Ireland were selling sets that would never work on Irish DTT. They ALL excused it by saying most people watch UPC/Virgin cable or Sky satellite via set-box. Should have labelled them as monitors. From the start Irish DTT was Mpeg4 for all channels, even SD with MHEG5 interactive like UK (unfortunately instead of European mainland), but DVB-T, no DVB-T2.
They were also still selling (dumping?) older models made for UK with no DTT tuner, just Analogue, after 2008. We surveyed twice.
Consumer protection is not well enforced here.
