Touch display device and touch method thereof

The embodiment of the invention discloses a touch display device and a touch method thereof, the touch display device is additionally provided with a pattern layer with a plurality of minimum units, and one touch electrode is correspondingly provided with the plurality of minimum units, namely, the precision of the minimum units is greater than that of the touch electrode. The feature body of the pattern layer is configured to be recognized by an external active pen, the first pattern has position information, then the external active pen obtains first coordinate information of an active pen contact, the first coordinate information is adopted to correct second coordinate information, and then the touch precision of the active pen contact is improved. 本申请实施例公开了一种触控显示装置及其触控方法，触控显示装置增设具有多个最小单元的图案层，一个触控电极上对应有多个最小单元，即最小单元的精度要大于触控电极的精度，所述图案层的所述特征体配置为被外置的主动笔所识别，所述第一图案具有位置信息，进而被外置主动笔获取主动笔触点的第一坐标信息，采用第一坐标信息修正第二坐标信息，进而提高主动笔触点的触控精度。