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Methods for detecting and correcting capacitance touch pad

A technology of capacitive touch and detection method, which is applied in the direction of electrical digital data processing, input/output process of data processing, instruments, etc., can solve the problem of inconvenient detection of capacitive touch panel

Inactive Publication Date: 2011-06-29
ELAN MICROELECTRONICS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Therefore, there are above-mentioned inconveniences and problems in the detection of the known capacitive touch panel.

Method used

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  • Methods for detecting and correcting capacitance touch pad
  • Methods for detecting and correcting capacitance touch pad
  • Methods for detecting and correcting capacitance touch pad

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Experimental program
Comparison scheme
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Embodiment Construction

[0138] The present invention will be further described below in conjunction with embodiment and accompanying drawing.

[0139] see now Figure 5 , Figure 5 It is a schematic diagram of scanning the excitation area for the X-direction induction line. The self-capacitance conversion value of the whole capacitive touch panel after the analog-to-digital conversion is obtained in advance by means of excitation area detection as reference data for use in subsequent object positioning calculations. When detecting the sensing line X1, use the first signal to detect the sensing line X1, and sequentially provide the second signal to excite the sensing lines Y1, Y2...Yn, and each intersection of the sensing line X1 and the sensing lines Y1~Yn is a incentive zone. The sensing line X1 is detected and the sensing lines Y1 to Yn are sequentially excited to obtain the self-capacitance conversion values ​​of the n excitation regions on the sensing line X1. Next, the sensing line X2 is det...

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PUM

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Abstract

The invention discloses a method for detecting a capacitance touch pad. The method is characterized by comprising the following steps of: defining a plurality of excitation regions by using a plurality of first direction induction lines and a plurality of second direction induction lines; providing a first signal to detect the first direction induction lines and providing a second signal to excite the second direction induction lines; providing the first signal to detect the second direction induction lines and providing the second signal to excite the first direction induction lines; obtaining and storing the correction parameters of the first direction induction lines and the correction parameters of the second direction induction lines; obtaining first self-capacitance conversion values of the excitation regions according to the correction parameters of the first direction induction lines; obtaining second self-capacitance conversion values of the excitation regions according to the correction parameters of the second direction induction lines; and storing the first and second self-capacitance conversion values of the excitation regions for the use of subsequent position calculation or multi-fingered calculation and positioning the touch position of an object.

Description

technical field [0001] The invention relates to a capacitive touch panel, in particular to a detection and correction method for a capacitive touch panel. Background technique [0002] The detection of a capacitive touch panel is achieved by the cooperation between the touch panel and the touch circuit hardware, firmware, and software. For example, a touch panel with two-dimensional wiring must be equipped with a two-dimensional touch circuit for detection. The capacitance change is converted into analog-to-digital (ADC) values, which are then used to locate the object's position. [0003] figure 1 It is a schematic diagram of a known capacitive touch panel module, which includes a part carrier 10 , a touch panel 12 and a sensor 14 printed on it. The component carrier 10 is usually a flexible printed circuit board, and an integrated circuit (IC) including a detection circuit is arranged on the component carrier 10, and is connected to the sensor on the touch panel 12 throu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044
Inventor 王尊民黄俊中
Owner ELAN MICROELECTRONICS CORPORATION