DISPLAY APPARATUS

摘要

The present invention relates to a A display apparatus comprising includes a display panel to display a picture thereon, and a front cover and a rear cover to support the display panel, further comprising a pen unit provided to be movable on the display panel, and comprising including a light generator provided to emit light and a supersonic wave generator provided to emit a supersonic wave;, a light sensor provided in at the front cover to detect the light emitted from the light generator;, a first supersonic wave sensor provided in at the front cover to detect the supersonic wave emitted from the supersonic wave generator, and disposed adjacent to the light sensor to measure a distance from the pen unit by using detected a time difference with between when the light sensor detects the light and when the first supersonic wave generator detects the supersonic wave;, a second supersonic wave sensor provided in at the front cover to detect the supersonic wave emitted from the supersonic wave generator, and spaced apart from the first supersonic wave sensor to measure a relative distance from the pen unit by using the detected a time difference with between when the first supersonic wave sensor and the second wave sensor detect the supersonic wave;, and a controller to receive a detecting signal from each of the first supersonic wave sensor, the second supersonic wave sensor, and the light sensor, and to detect position information of the pen unit based on the received detecting signals. Thus Accordingly, the present invention provides a display apparatus, which performs a tablet function and reduces production costs by using a simple and general display panel.