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Electronic device with capacitive induction circuit carrying phase information, and method for electronic device

A phase information, electronic device technology, applied in electrical digital data processing, data processing input/output process, instruments, etc., can solve the problems of multiple calculations, complex phase correction and phase compensation, etc., to achieve the effect of reducing costs

Active Publication Date: 2015-04-29
SILICON INTEGRATED SYSTEMS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned phase correction and phase compensation are too complicated and require a lot of calculations

Method used

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  • Electronic device with capacitive induction circuit carrying phase information, and method for electronic device
  • Electronic device with capacitive induction circuit carrying phase information, and method for electronic device
  • Electronic device with capacitive induction circuit carrying phase information, and method for electronic device

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Embodiment Construction

[0030] The present invention takes advantage of the properties of orthogonal vectors. Assume that each vector of a vector group is Vi, where i=0, 1, . . . , n. If the product of a vector with a different vector is 0 (ie, Vi×Vj=0, where i≠j), and the product of a vector with itself is 1 (ie, Vi×Vj=1, where i=j), then This is an orthogonal vector group. When V1=(a1,b1,c1,d1) and V2=(a2,b2,c2,d2), the product of V1×V2 is equal to a1×a2+b1×b2+c1×c2+d1×d2. For example, if the vector group includes two vectors: V1=(0,0,0,1) and V2=(0,0,1,0), then satisfy V1×V1=1, V1×V2=0, And V2×V2=1. Therefore, V1 and V2 are orthogonal.

[0031] Any signal can be expressed as an orthogonal vector group, such as S=c1V1+c2V2+c3V3+...+cnVn, where c1, c2,...,cn are coefficients. If the environmental noise is expressed as N=100V1+50V2+20V3+10V4+2V5+4V6+10V7 . . . , each vector V1, V2, . . . represents a component of a specific frequency band. For a known signal A, if V5 is selected as the modulati...

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Abstract

The invention discloses an electronic device, which comprises a touch panel, a detector and a sensor, wherein the detector is used for transmitting a driving signal which has a default cycle and additional phase information; the touch panel comprises a plurality of induction units; when the induction units are touched, a sensing signal is generated; the sensor is used for receiving the sensing signal and determining a detection value according to the default cycle and phase information of the driving signal; a signal taking-out device of the sensor is used for generating a demodulation signal according to the pulse widths of the default cycle and phase information of the driving signal, and demodulating the sensing signal according to the demodulation signal to determine the detection value; and a phase detector of the sensor is used for starting the signal taking-out device when the amplitude of the sensing signal is greater than a default value. Without phase compensation, the electronic device can process an analog signal by using the demodulation signal to determine a touch position.

Description

technical field [0001] The present invention relates to an electronic device with a touch panel and a method for processing information of the electronic device, in particular to an electronic device and a method that can use a demodulated signal to process an analog signal to determine a touch position without phase compensation. Background technique [0002] For the convenience of portability and use, a touch-panel that users can directly touch has gradually become the direction of market development. LCD displays for PDAs are often combined with touch panels to omit keys or function buttons. The touch panel generates electrical signals through touch to control the image display of the liquid crystal display and realize function control. [0003] see figure 1 , figure 1 is a schematic diagram of a conventional electronic device 10 with a touch panel 11 . The touch panel 11 of the electronic device 10 has a sensor array 12 for detecting the touch position and force of a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/044
Inventor 吴鸿伟叶映志张志宇
Owner SILICON INTEGRATED SYSTEMS