Touch control device and touch control method for OLED flexible display device

Abstract

The invention provides a touch control device and a touch control method for an OLED flexible display device, wherein the touch control method comprises the steps of when the displaying mode of the OLED flexible display device is switched, acquiring a cathode voltage changing value; comparing the cathode voltage changing value with a preset threshold, and if the cathode voltage changing value exceeds the preset threshold, increasing the emitter electrode voltage of a touch control electrode layer in the OLED flexible display device. According to the touch control device and the touch control method, when displaying mode switching causes a cathode voltage change, if the cathode voltage change value exceeds the preset threshold, the voltage output amplitude of an emitter electrode is increased for ensuring constant electric amount change value of a receiving electrode when the cathode voltage change occurs, and furthermore constant electric amount of node capacitance between the emitter electrode and the receiving electrode is ensured, thereby improving touch control performance consistency.

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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