It has been found that the performances of 24- to 32-inch TV-cum-PC monitors (TVs that can double as PC monitors) sold by eight companies such as Samsung and LG are far below those expressed in their advertisements.
The Consumers Korea, an incorporated body, said in a briefing at the Government Complex in Sejong City on April 17 that the performances of eight TV-cum-PC monitors in their initial setting modes were below those explained in their promotional material, after it tested performances in the contrast ratio and response speed categories.
The tested products were a Samsung monitor (LT24D590KD), an LG monitor (24MT48DF), a Yamakasi monitor (T320UF), a Xavvio monitor (X2700EWT), a Smartra monitor (SHE-320XQ), a Jooyon Tech monitor (D24HBFNA), a Zentview monitor (CN-F2410HL) and a Hook monitor (HT240LED).
First of all, in terms of the response speed, all the products were exaggerated. Their product information says that their response speeds are 5 to 12ms. But no products showed the speeds marked in their production information labels. The Jooyon Tech monitor measured 2.8ms.
Their contrast ratios were also different from those in the product information. The contrast ratio is a measure of how well bright and dark areas are distinguished on a screen. The higher a value is, the better a contrast is.
The LG product with a contrast ratio of 3,000 to 1 in the product information was found to be 5,866 to 1. Moreover, the Jooyon Tech and Hook monitors were also found to have contrast ratios higher than those in their product information. The products of Samsung, Yamakasi, Xavvio, Smatra, and Zentview had lower contrast ratios than those in their promotional material.
In addition, all the eight models subject to the test showed poor TV reception functions in some test items. Seven products were poor at showing subtitles in network TV programs. Three products were devoid of notices about energy efficiency grades which are mandatory.