An active matrix display device having touch input functionality is provided. The reflective characteristic of the first optical film determined by the reflectance of light of each wavelength in a reflective band is different from the reflective characteristic of the second optical film determined by the reflectance of light of each wavelength in the reflective band. When rebooting the process detects changed hardware and diverts from the reboot to identify the hardware before continuing. , to supplement natural light passing through the window or to provide illumination when natural light is not available. The musical key-bed is optionally detachably coupled with a protective cover for providing ergonomic support when said musical key-bed is not being used.