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Device and method for sensing touch panel

A sensing method and touch panel technology, applied in the input/output process of data processing, instruments, electrical digital data processing, etc., can solve the problems of slow charging speed, no mention of counting methods, etc., and achieve the effect of improving resolution

Inactive Publication Date: 2010-03-31
HOLTEK SEMICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] (2) There is no mention of how to count;
[0011] (4) The potential is not integrated and amplified before comparison, so the required charging speed is slower

Method used

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  • Device and method for sensing touch panel
  • Device and method for sensing touch panel

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Experimental program
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Embodiment Construction

[0019] The main idea of ​​this application is not to use analog / digital (A / D) conversion technology, but only to integrate and amplify each touch capacitance of the touch panel, and then use high-speed frequency to count the time spent on integration to determine the touch capacitance. Whether the touch point on the panel is touched.

[0020] see figure 1 , which is a circuit diagram of a preferred embodiment of the sensing device of the touch panel proposed by the present application, wherein the sensing device 1 mainly includes a pulse generator 10 (represented by an oscillator in this embodiment), a switch group 11, an integral Amplifier 12 , comparator 13 , counter 14 and memory 15 .

[0021] Any touch point on the touch panel that is not drawn in the figure is electrically connected to the touch capacitor, although in figure 1 Only a single touch capacitor 16 is drawn as a representative, but those skilled in the art know that in the case of using an additional multiple...

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PUM

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Abstract

The present invention provides a device and method for sensing a touch panel, wherein any touch point of the touch panel is electrically connected with a touch capacitor. The sensing method comprises:integral amplifying the charge energy of the touch capacitor, obtaining a standard potential value in the total time cycle, wherein the total time cycle is the summation of a standard time cycle andan additional time cycle; and counting the additional time cycle in system frequency after the standard time cycle in the total time cycle, so as to determine the touch point.

Description

technical field [0001] The present application relates to a sensing device and method, in particular to a sensing device and method for a touch panel. Background technique [0002] Most capacitive touch sensing technologies currently applied to touch panels use analog / digital (A / D) conversion technology to analyze changes in capacitance potential. For example, when a finger touches a circuit board or glass panel, the charge absorbed by the finger is very limited, and the charge not absorbed by the finger is divided into two parts: one part is radiated into the space, and the other part is directly coupled to the integrator and amplified device. [0003] The signal potential coupled to the integrator and the amplifying device will form the touch potential value of the touch point, and the touch potential value is compared with the original potential value when the touch point is not touched, and the touch potential value and the original potential value The value ratio is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044
Inventor 林怡诚
Owner HOLTEK SEMICON
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