Capacitive touch display device

A capacitive touch and display device technology, which is applied to the input/output process of electrical digital data processing, instruments, and data processing, etc., can solve the problem of weak sensing signals, insufficient signal strength, and inability to effectively and accurately estimate touch location, etc.

Inactive Publication Date: 2013-07-24
NOVATEK MICROELECTRONICS CORP
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Problems solved by technology

However, Figure 2A and Figure 2B Although the induction device 200 of the middle double-layer structure can reduce the chance of receiving noise, because the driving signal has only a small voltage value, the induction signal generated by the receiving electrode 24C is usually extremely weak, so that it will not be effective and Accurately estimate the touch position
[0008] In short, although the existing double-layer structure sensing device has reduced the interference of noise, the received signal sensed by the receiving electrode 24C still has the problem of insufficient signal strength.

Method used

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Embodiment Construction

[0040] Please refer to the detailed implementation of the present invention image 3 , image 3 It is a schematic diagram of a sensing device 300 of a capacitive touch display device according to an embodiment of the present invention. The structure of the sensing device 300 is similar to that of the sensing device 200, and also adopts a double-layer structure design. That is, the sensing device 300 includes a driving signal layer 301 and a sensing signal layer 302 , and the driving signal layer is disposed on a display of the touch display device. The receiving signal layer is arranged between a protective glass layer and the driving signal layer 301 in the touch display device, so that the driving signal layer 301 can be prevented from being completely exposed to the noise source (display), so as to reduce the induced signal noise. Such as image 3 As shown, the driving signal layer 301 of the sensing device 300 is composed of the driving electrodes D1-DM, and the receiv...

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Abstract

The invention discloses a capacitive touch display device, which is applicable to a touch display device. The capacitive touch display device comprises a displayer, a glass protective layer, a driving signal layer and a receiving signal layer, wherein the driving signal layer is arranged on the displayer and comprises a plurality of driving electrodes, and a plurality of driving signals are output to the driving electrodes in sequence; the receiving signal layer is arranged between the glass protective layer and the driving signal layer and comprises a plurality of receiving electrodes; the receiving electrodes are used for sensing the driving signals, and accordingly outputs a plurality of receiving signals; and at least one of the receiving electrodes comprises at least one cavity so as to enhance the signal sensing.

Description

technical field [0001] The present invention relates to a capacitive touch display device, in particular to a capacitive touch display device which increases the strength of a sensing signal by adding holes in a receiving electrode. Background technique [0002] Since the touch display device provides users with more intuitive and convenient operation methods, it is widely used in various consumer electronic products. Capacitive touch display devices have the advantages of high accuracy, multi-touch, high durability, and high touch resolution, and have become the mainstream touch technology used in mid-to-high-end consumer electronic products. [0003] Generally, a touch display device is composed of a display and a transparent touch panel, and the touch and display functions can be realized simultaneously by laminating the transparent touch panel on the display. The capacitive touch technology mainly detects the touch event by detecting the change of the sensing capacitanc...

Claims

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Application Information

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IPC IPC(8): G06F3/044
Inventor 赖志章李俊贤
Owner NOVATEK MICROELECTRONICS CORP
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