Touch sensing apparatus

A technology for touch sensing and voltage sensing, applied in instruments, computing, electrical digital data processing, etc., can solve the problems of thickening of the overall device, misjudgment of touch points, and increased cost, reducing power consumption, accurate The effect of sensing and reducing the chance of misjudgment

Inactive Publication Date: 2012-07-18
RAYDIUM SEMICON
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Problems solved by technology

[0004] However, the above-mentioned traditional LCD touch sensing method has some serious disadvantages, such as the scan rate is too low, the noise generated by the display panel seriously affects the work of the touch control chip, and even leads to misjudgment of the touch point
In some systems, an extra layer of insulating material is placed between the conductive film sensor and the panel in order to avoid the noise generated by the panel. However, this method will increase the cost and cause the overall device to become thicker, which is not conducive to the design of the mechanism.

Method used

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Embodiment Construction

[0022] The first specific embodiment according to the present invention is a touch sensing device. In this embodiment, the touch sensing device may be a mutual-inductance capacitive touch sensing device, which can sense multiple data from the conductive film sensor at the same time and prevent the sensed data from being disturbed by the liquid crystal display panel. The influence of the information leads to the misjudgment of the touch point.

[0023] Please refer to figure 1 , figure 1 It is a schematic diagram illustrating that the touch sensing device of the present invention performs touch point sensing on a display panel. like figure 1 As shown, the liquid crystal display includes a conductive film sensor 100 and a touch sensing device 1 . As for the liquid crystal display panel, it is generally pasted under the conductive film sensor 100 , but it is not limited thereto. The touch sensing device 1 includes a logic control module 10, a plurality of pins 20, at least o...

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Abstract

A touch sensing apparatus is disclosed. The touch sensing apparatus includes a logic control module, at least one storage control module, and at least one decoding control module. The logic control module is used to generate a plurality of control signals having different control timings. The plurality of control signals includes a storage control signal and a decoding control signal. Each storage control module includes a plurality of storage capacitors, and respectively stores each of sensed voltages in different storage capacitors at different times according to a storage control timing of the storage control signal. The sensed voltages are analog data sensed from scan lines of an ITO sensor. The decoding control module is used to decode the sensed voltages stored in the storage capacitors according to a decoding control timing of the decoding control signal to output the decoded analog data.

Description

technical field [0001] The present invention is related to touch sensing, in particular to a touch sensing device that uses the concept of chargesharing to realize the function of an analog filter, thereby reducing the cost of the liquid crystal display panel and the external environment. The generated noise interferes with touch sensing. Background technique [0002] With the rapid development of technology, thin film transistor liquid crystal displays (TFT LCDs) have gradually replaced traditional displays, and have been widely used in various electronic products such as TVs, flat panel displays, mobile phones, tablet computers, and projectors. For a TFT-LCD with touch function, the touch sensor is one of the important modules, and its performance directly affects the overall performance of the LCD. [0003] Generally speaking, a traditional liquid crystal display with mutual capacitive touch function includes a display panel, an ITO sensor and a touch control chip. Wher...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041
CPCG06F3/0418G06F3/044G06F3/04182G06F3/04186G06F3/0446
Inventor 詹前煜王建国唐尚平左克扬
Owner RAYDIUM SEMICON
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