Device having multi-layered touch sensitive surface

摘要

A touchscreen display device may include a capacitive sensor disposed adjacent to a top surface of the display device, and a resistive sensor disposed below the capacitive sensor. A backlight may selectively illuminate a pattern on an inner side of the top surface of the display device, so that the pattern is visible from outside the display device when the backlight is activated, and is not visible when the back light is not activated.

主权项

1. A method of operating a touchscreen device, the method comprising:
detecting, by a capacitive sensor, a first user interaction with a predetermined portion of a touch surface on an exterior surface of a cover layer, the capacitive sensor being positioned adjacent to an interior surface of the cover layer; in response to the first user interaction, activating a backlight and directing light generated by the backlight toward the cover layer; detecting, by a resistive sensor positioned below the capacitive sensor, a second user interaction with the touch surface, the second user interaction including an actuation force applied to the touch surface that is sensed by the resistive sensor, and processing an input corresponding to the second user interaction wherein the backlight is positioned below the resistive sensor, and wherein activating the backlight and directing light generated by the backlight toward the cover layer includes directing light from the backlight along a light guide layer positioned below the resistive sensor, and through the resistive sensor and the capacitive sensor toward the cover layer such that light generated by the backlight is emitted through translucent portions of a pattern layer provided on the interior surface of the cover layer, and is blocked by opaque portions of the pattern layer; and de-activating the backlight such that light is not directed toward the predetermined portion of the touch surface, wherein the translucent portions and the opaque portions of the pattern layer define a keyboard at the predetermined portion of the touch surface, and wherein activating a backlight includes transmitting light through the translucent portions of the keyboard such that the keyboard is visible through the cover layer.