[INPp1] Interactive Technologies

[INPp1-5L] An evaluation and reduction of the coupling noise in pen-based touch screen display

*Ying Kan Yang¹, Tzu Jung Tien ¹, Wei Shan Yu¹, Meng Wei Shen¹, Wen Bin Wu¹, Wen Ching Tsai¹ (1. AU Optronics Corporation (Taiwan))

Keywords:touch screen display, AHVA, noise, Vcom compensation, passivation layer

Here we report the quantitative analysis of coupling noise in AHVA mobile display. Moreover, some approaches for reducing the coupling noise are demonstrated. The addition Vcom compensation circuit and moderate thickness of passivation layer is introduced to diminish the coupling noise.