Touch circuit and touch display device

Abstract

The invention provides a touch control circuit and a touch control display device. The touch control circuit comprises a multiplexer, a filtering switch, a signal converter, a digital signal processor and a controller. The multiplexer is provided with a plurality of input terminals. The plurality of input terminals are in one-to-one correspondence with a plurality of sensing lines arranged on a touch control display panel and are connected with each other. The output terminal of the multiplexer is connected with the input terminal of the signal converter. The output terminal of the signal converter is connected with the input terminal of the signal converter. The output terminal of the signal converter is connected with the input terminal of the digital signal processor. The filtering switch is connected between the output terminal of the multiplexer and a direct-current voltage source. The grid electrode of the filtering switch is used for receiving a switching control signal provided by the controller. According to the technical scheme of the touch control circuit and the touch control display device, the capacitance on the touch control display panel is detected by the multiplexer and the filtering switch, so that the influence of the driver noise on a sensing result can be reduced. Therefore, the sensing result of the touch control circuit is more accurate. Furthermore, the sensing performance of the touch control display device is improved.

Description

technical field [0001] The invention relates to the field of touch technology, in particular to a touch circuit and a touch display device. Background technique [0002] In recent years, with the rapid development and application of information technology, wireless mobile communication and information home appliances, people's dependence on electronic products is increasing day by day, which brings about the vigorous development of various display technologies and display devices. The touch display panel formed by combining the touch function and the display function has been widely used in various products due to its human-computer interaction characteristics, including mobile phones, GPS navigator systems, Tablet computer (tabletPC), personal digital assistant (PDA), notebook computer (laptop PC) and medical equipment, etc. [0003] Please refer to figure 1 , which is a structural schematic diagram of a touch display panel in the prior art. Such as figure 1 As shown, t...

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a touch control circuit and a touch display device to solve the problem that the existing touch control circuit is not accurate enough in sensing touch signals

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