Patent ID: 9035202
Filing Date: 2015-05-19
Classification: G06F,G09G

Abstract:
1. A touch detecting function display apparatus comprising: a plurality of common driving electrodes that are disposed in parallel so as to extend in one direction; a display element that performs display based on a pixel signal and a display driving signal; a touch detection element that detects an external approaching object based on a touch detection driving signal; and a scanning driving unit that performs first scanning driving for sequentially applying the display driving signal to the plurality of common driving electrodes in a time division manner and second scanning driving for sequentially applying the touch detection driving signal to the plurality of common driving electrodes in a time division manner, wherein the scanning driving unit performs the second scanning driving at a scanning speed higher than that of the first scanning driving, and simultaneously selects two or more common driving electrodes as targets of the second scanning driving, wherein when the two or more common driving electrodes selected as targets of the second scanning driving includes a common driving electrode that overlaps with a common driving electrode selected as a target of the first scanning driving, the scanning driving unit applies the display driving signal to the overlapping common driving electrode, and applies the touch detection driving signal to common driving electrodes other than the overlapping common driving electrode among the two or more common driving electrodes selected as targets of the second scanning driving, wherein the scanning driving unit includes a plurality of output circuits, a scanning control unit, a shift register unit, and a timing adjustment unit, the plurality of output circuits respectively corresponding to the plurality of common driving electrodes, wherein each of the plurality of output circuits outputs the display driving signal or the touch detection driving signal to a corresponding common driving electrode based on a first output signal that includes a pulse indicating a period for outputting the display driving signal and a second output signal that includes a pulse indicating a period for outputting the touch detection driving signal, and outputs the display driving signal to the corresponding common driving electrode based on the first output signal in an overlap period during which a period of the pulse of the first output signal and a period of the pulse of the second output signal are overlapped, wherein the scanning control unit outputs a control signal having a pulse with a pulse width which is M times a scanning pitch period, and a clock signal having N transitions during the scanning pitch period, wherein the shift register unit performs serial parallel conversion on the control signal based on the clock signal to generate a plurality of parallel output signals having a pulse with a pulse width corresponding to the pulse width of the pulse of the control signal, wherein the timing adjustment unit adjusts each output timing of the parallel output signals generated through the serial parallel conversion such that (1) the pulses of the parallel output signals are output at a timing corresponding to a start timing of the scanning pitch period, (2) the pulses of N parallel output signals are simultaneously output to N output circuits corresponding to N common driving electrodes adjacent to each other, and (3) start timings of the pulses of the parallel output signals are shifted by the scanning pitch period such that the shift increases by one scanning pitch period for each subsequent N common driving electrodes, and wherein the timing adjustment unit outputs each adjusted parallel output signal as the second output signal.