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Semiconductor device and error canceling method

A semiconductor, detection cycle technology, applied in the direction of instrument, electrical digital data processing, data processing input/output process, etc., can solve the problem of inability to cope with the AC charger problem, and achieve the effect of preventing deterioration

Active Publication Date: 2015-06-17
SYNAPTICS JAPAN GK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technology of this prior application is only by applying the technology described in Patent Document 1, that is, in order to reduce noise in the detection period of the capacitive touch panel, the touch panel is driven with a plurality of driving pulses of different frequencies, and the Solve the problem of not being able to cope with the problem of AC chargers by adopting a technology that only has a small effect of noise.

Method used

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  • Semiconductor device and error canceling method
  • Semiconductor device and error canceling method
  • Semiconductor device and error canceling method

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Embodiment Construction

[0038] 1. Outline of Implementation

[0039] First, the outline of the embodiments disclosed in this application will be described. The reference numerals in the drawings referred to by parentheses in the summary description of the embodiments are merely examples of reference numerals included in the concept of the constituent elements labeled.

[0040] ﹝1﹞ >

[0041] The semiconductor device (10A, 10B) includes a touch panel controller (3) and a data processor (5). The touch panel controller (3) periodically introduces driving electrodes (Y1 to YM) and detection electrodes via the touch panel The capacitance component between (X1 to XN) is presented to the signal of the detection electrode to generate detection data corresponding to the capacitance component. The touch panel controller includes a control circuit (308) that controls the detection period (Tdc) in which the signal is periodically introduced and the detection period (Tdt) in each period. The data processor sets the ...

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Abstract

Embodiments herein include a device, system, and method for periodically capturing sensing signals using one or more detection electrodes to generate data for detecting an object proximate to the detection electrodes. The sensing signals are captured during detection periods within periodic detection cycles where each of the detection cycles define a period of time between consecutive detection periods. In addition, the device, system and method set a duration of the detection cycle to 1 / m (where m is appositive integer) of a duration of a display-scan cycle. The value of m is selected based on a periodic noise signal. Thus, the device, system, and method may prevent a periodic noise signal which has a cycle that is longer than the detection period from worsening the accuracy of touch detection.

Description

Technical field [0001] The present invention relates to a semiconductor device having a touch detection and control function on a touch panel, and further relates to a method for offsetting the influence caused by periodic noise in a periodic signal introduction operation, for example, it relates to a method for integrated with a liquid crystal display panel. An effective technology applied to semiconductor control devices controlled by touch panels. Background technique [0002] In an unpublished prior application (Japanese Patent Application No. 2012–216745), the applicant proposed a technique to prevent deterioration of touch detection accuracy caused by external noise such as AC charger noise in a portable information terminal incorporating a touch panel. That is, there is a case where the output voltage of the AC charger and the local ground voltage of the AC charger swing at a predetermined frequency. At this time, when viewing the global ground outside the touch panel with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041G06F3/044
CPCG06F3/04184G06F3/04186G06F3/0446
Inventor 石井达也田中伸和武山洋士赤井亮仁
Owner SYNAPTICS JAPAN GK