Development of flexible capacitive touch control device

To overcome the problems such as low resolution and complicated structure that are associated with the existing touch control device,based on the capacitive touch principle a flexible touch control device is developed using a single-layer inductive non-woven carbon film as its touchpad.When a working area in the touch pad is set as 126 mm × 72 mm,with 72 mm side length of L-shape electrode,the test results show that the linearity of the touch control device in X and Y directions is ±4.40% and ±4.39%,respectively,and that the resolution reaches as high as 251 dpi × 243 dpi.For further discussion on the controlling accuracy of the device,the deviation rate is defined.The test results show that the control positions,of which the deviation rates are greater than 6%,are located near the edges of the working area.In addition,increasing the side length of the L-shape electrodes has positive but limited effects on the improvement of the linearity.Therefore,it would be preferable to use point electrodes for flexibility and wearablity.