Yokogawa Electric Corp.'s new YS1000 series single loop controllers feature a new TFT LCD with improved display characteristics and a design that facilitates easy maintenance. Formerly, this product used a STN LCD screen. This has been changed to a TFT LCD screen that has a 1.5 times wider viewing angle. The display contrast and brightness are also notably improved, making the screen much easier to read. In addition, the TFT LCD has a longer lifespan and does not need to be replaced as frequently. As controllers typically are used over long periods of time, periodic replacement of the LCD screen is required. With the enhanced YS1000 controllers, the TFT LCD can be replaced while the controller is online, without interrupting the output of signals to control elements; there is no need to switch off the controller before replacing the display.