A kind of touch device and touch method of oled flexible display device

Abstract

The present invention provides a touch device and a touch method for an OLED flexible display device, wherein the touch method includes: acquiring a cathode voltage change value when the display mode of the OLED flexible display device is switched; A threshold is set for comparison, and if the change value of the cathode voltage exceeds the preset threshold, the voltage of the emitter electrode of the touch electrode layer in the OLED flexible display device is increased. In the present invention, when the cathode voltage changes due to display mode switching, if the cathode voltage change value exceeds the preset threshold, the voltage output amplitude of the transmitting electrode is increased, and the electric quantity change of the receiving electrode is kept constant when the cathode voltage changes, thereby maintaining The electric quantity of the node capacitance between the transmitting electrode and the receiving electrode remains unchanged, which improves the consistency of the touch performance.

Description

technical field [0001] The present invention relates to the technical field of screen display, in particular to a touch device and a touch method for an OLED flexible display device. Background technique [0002] Flexible display is a very competitive display technology in the future. The common OLED (Organic Light Emitting Diode, Organic Light Emitting Diode) flexible display device includes a display panel and a touch panel on its upper surface. The display panel includes a light-emitting area and a non-light-emitting area. area, the touch panel includes a plurality of horizontal and vertical electrodes in a grid shape. In order to make flexible display devices thinner, such as figure 1 As shown, the touch panel will be made directly above the encapsulation layer, and the touch electrode is only a dozen microns away from the cathode, resulting in a large coupling capacitance between the transmitting electrode and the receiving electrode and the cathode, so most of the ele...

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Problems solved by technology

Another example figure 2 As shown, when the finger touches, the electric field of the receiving electrode changes very little. When the cathode voltage changes with the display mode of the mobile phone (for example, the brightness of the display screen changes) (-1V~-5V), the transmitting electrode and the receiving electrode will The change of the electric field of the receiving electrode will result in the change of the electric field of the receiving electrode, which will affect the performance of the touch control.

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