Abstract:
An optical touch screen apparatus in which an oxide semiconductor transistor is used as a light sensing device, and a method of driving the optical touch screen apparatus. The optical touch screen apparatus includes an array including a plurality of light sensing pixels for sensing incident light, a gate driver for providing each of the light sensing pixels with a gate voltage and a reset signal and a signal output unit for receiving a light sensing signal from each of the plurality of light sensing pixels to output a data signal. The gate driver includes a plurality of gate lines that provide a gate voltage to each of the light sensing pixels and at least one reset line that provides a reset signal to each of the light sensing pixels and is electrically connected to the plurality of light sensing pixels.
Abstract:
A touch panel includes a sensing unit having a first sub sensing unit configured to output a first sensing current in response to a voltage of a first gate line and configured to reset in response to a voltage of a second gate line the first sensing current corresponding to a first touch type, and a second sub sensing unit configured to output a second sensing current in response to a voltage of a third gate line and configured to reset in response to a voltage of a fourth gate line, the second sensing current corresponding to a second touch type which is different than the first touch type, a display unit configured to generate an image voltage corresponding to image data to be displayed, in response to at least one of the voltages of the first to fourth gate lines and liquid crystal.
Abstract:
A touch panel configured to drive a liquid crystal according to a voltage difference between first and second electrodes. The touch panel includes at least one display unit configured to generate an image voltage and apply the image voltage to the first electrode. The image voltage corresponds to image data to be displayed in response to activation of a display gate line. The touch panel further includes at least one sensing unit configured to sense, in response to activation of a sensor gate line, a voltage variation of the second electrode to determine whether a finger capacitance is generated by a physical touch on the touch panel.
Abstract:
An touchscreen apparatus includes pixel rows including pixels configured to display an image, a touch-sensing unit configured to sense a physical touch and a light-sensing unit configured to sense incident light, the touch-sensing unit and the light-sensing unit being between two adjacent pixel rows and configured to operate based on first and second gate signals, a first sensor gate line connected to the light-sensing unit and the touch-sensing unit and configured to provide the first gate for activating the light-sensing unit and resetting the touch-sensing unit, a second sensor gate line connected to both the light-sensing unit and the touch-sensing unit and configured to provide the second gate signal for activating the touch-sensing unit and resetting the light-sensing unit, and a reset circuit configured to provide a common voltage to the pixels based on the operation of at least one of the light-sensing unit and the touch-sensing unit.
Abstract:
A color optical pen includes a tip unit, a pen body unit attached to the tip unit; a pressure sensor that is disposed in the tip unit and configured to sense at least contact between a display unit of a terminal device and the tip unit; a light source that is disposed in the pen body unit and is configured to output light through the tip unit, if the pressure sensor senses the contact; a color selection switch that is disposed on the pen body, the color selection switch configured to select a color in response to operation by a user; and a driver configured to drive the light source at a frequency or pattern based on operation of the color selection switch.