Driver circuit for touch panel

Abstract

The invention provides a touch driver circuit, by only using a select signal (Select) to control the operation of transport gates (TG1, TG2) to realize output of a valid pulse touch driver signal (TXH) and a constant low voltage signal (TXL). The circuit structure is simplified, and removes a plurality of elements and two control signals so as to reduce the layout space occupied by the touch driver circuit as well as reduced the border width of the touch display to realize narrow border design for touch display panel.

Description

BACKGROUND OF THE INVENTION1. Field of the Invention[0001]The present invention relates to the field of display, and in particular to a driver circuit for touch panel.2. The Related Arts[0002]In the rapid development of display technology, the liquid crystal display (LCD) and organic light-emitting diode (OLED) display have the advantages of high display quality, low power-consumption, and thin, and are widely used in applications, such as, mobile phone, TV, personal digital assistant (PDA), digital camera, notebook PC, desktop PC, and so on, and become the mainstream display technology.[0003]A touch panel provides an effective and direct interface for human-machine interaction interface. By integrating the touch panel with the flat display into a touch display panel, the flat display panel with a touch control capability allows the users to operate in a more direct, intuitive and convenient way. The embedded touch display panel refers to the type that integrates the touch panel and...

AI Technical Summary

Benefits of technology

[0010]The object of the present invention is to provide a touch driver circuit, simplifying the circuit structure by reducing the number of the elements and the number of signals, reducing the space occupied by the touch driver circuit so as to reduce the border width of the touch display panel to realize the narrow-border touch display panel.

[0020]Compared to the known techniques, the present invention provides the following advantages: the present invention provides a touch driver circuit, by only using a select signal to control the operation of the transport gates to realize the output of the valid pulse touch driver signal and constant low voltage signal. The circuit structure is simplified, and removes a plurality of elements and two control signals so as to reduce the layout space occupied by the touch driver circuit as well as reduced the border width of the touch display to realize narrow border design for touch display panel.

Problems solved by technology

Although the touch driver circuit in the above known hybrid embedded touch display panel can effectively reduce the number of output ports in the integrated circuit (IC), the number of the signals and elements are too many, which leads to occupying too much space by the touch driver circuit, and not suitable for narrow border design of the touch display panel.

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