According to engineer Vu Tran Chi Tam - Head of the evaluation evaluation committee (ITConnect Consulting Center), to check the dead-end point should let the wallpaper (desktop) completely black to find always dead spots (white ) and vice versa will detect always dead spots (red).According to technical standards, the number of die points of an LCD screen less than 4 is the level allowed by most manufacturers today.Dead spots may appear on a completely new screen (due to a production error) or after a period of use.If the dead spot is larger, consumers will be able to change the new screen during the warranty period.In addition, the contrast ratio is also a point to note because the higher this ratio will make the image shown on the LCD screen become sharper.
For current LCD monitors, the resolution must be at least 300: 1.Besides, the wider the standard of brightness, contrast, and viewing angle (commonly 120 degrees horizontal and 100 degrees vertical), fast response time (less than 25 milliseconds), analog interface / digital, optimal resolution . also need attention.Do not touch or use sharp objects to touch the screen;Do not clean the display area with detergent, it is best to use a gently dampened cotton wool;Do not place the monitor in direct sunlight;Do not place the monitor in a narrow space.The distance from the screen to the side objects is at least 10 cm.
Mai Phuong