Input device

摘要

An input device includes a transparent display panel configured to display a graphical interface, an input plate disposed above the display panel and composed of a material that transmits the graphical interface and allows infrared light to propagate through the input plate, an infrared-emitting unit disposed in contact with the input plate and configured to emit the infrared light into the input plate via a contact surface of the input plate, and an infrared detection unit disposed below the input plate and configured to detect diffused light of the infrared light which is generated at the input plate when the input plate is touched.

主权项

1. An input device, comprising:
a display panel including an upper glass substrate, a liquid crystal layer, and a lower glass substrate, and configured to display a graphical interface; an input plate disposed above the display panel and composed of a material that transmits the graphical interface and allows infrared light to propagate therethrough; an infrared-emitting unit disposed in contact with the input plate and configured to emit the infrared light into the input plate via a contact surface of the input plate; a support plate disposed below the display panel; an infrared detection unit disposed below the input plate and configured to detect diffused light of the infrared light which is generated at the input plate when the input plate is touched; a backlight disposed below the display panel and configured to illuminate the display panel; and a control unit, wherein the infrared detection unit is an infrared imaging unit and the display panel is a liquid crystal panel; the infrared imaging unit is disposed in the backlight; and the control unit is configured
to turn off the infrared-emitting unit when the backlight is turned on,to turn on the infrared-emitting unit when the backlight is turned off, andto cause the infrared imaging unit to obtain an image while the infrared-emitting unit is turned on.