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Touch Panel Controller And Semiconductor Device

A technology of touch panel and controller, which is applied in the direction of instruments, digital data processing parts, electrical digital data processing, etc., can solve the problems of power consumption, achieve low power consumption, high touch detection accuracy, and improve the effect of touch detection performance

Inactive Publication Date: 2014-10-22
SYNAPTICS JAPAN GK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that the speed-up of the coordinate sampling cycle is only for the entire surface of the touch panel. Since the sampling frequency is increased for all detection coordinates, it is wasted in a large number of touch coordinates that are not actually detected. electricity

Method used

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  • Touch Panel Controller And Semiconductor Device
  • Touch Panel Controller And Semiconductor Device
  • Touch Panel Controller And Semiconductor Device

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Embodiment Construction

[0029] 1. Outline of Embodiment

[0030] First, an outline of the embodiments disclosed in the present application will be described. In the summary description of the embodiment, the reference numerals in the drawings referred to in parentheses are only elements included in the concept of the constituent elements to which the numerals are added.

[0031] [1]

[0032] The touch panel controller (3) has: a drive circuit (30), which sequentially outputs drive pulse patterns to a plurality of drive electrodes (TX1-TXm) of the touch panel; a detection circuit (31), which outputs each The aforesaid driving pulse pattern is used to detect the signal changes appearing at a plurality of detection electrodes (RX1-RXn) of the touch panel; and a control circuit (33-34, or 34-37), which controls the aforesaid driving circuit and detection circuit. The driving circuit can make the pulse frequency of the driving pulse pattern variable in units of driving electrodes. The detection circui...

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Abstract

The drive circuit operable to output a drive pulse pattern to drive electrodes of a touch panel is arranged so that it can change the pulse frequency of the drive pulse pattern for each drive electrode. The detection circuit operable to detect signal changes arising on detection electrodes of the touch panel for each drive pulse pattern output by the drive circuit is arranged so that it can change the sampling frequency of signal change for each detection electrode. The range to make higher the pulse frequency of the drive pulse pattern for each drive electrode, and the sampling frequency of signal change for each detection electrode is variably controlled according to a touch position where a touch has been detected by use of a detection signal detected by the detection circuit.

Description

technical field [0001] The present invention relates to a touch panel controller for controlling a touch panel, and a semiconductor device equipped with a touch panel controller, and relates to a technology effectively applied to a driver IC for display driving and touch detection control of a panel module, in which the panel The module is formed by assembling a touch panel on a liquid crystal display panel. Background technique [0002] In order to improve the accuracy of the touch detection performed by the touch sensor, for example, in the mutual capacitance detection method, it is only necessary to increase the frequency of the driving pulse for driving the driving electrode and thus the sampling frequency of the signal change occurring at the detection electrode, and increase to display The number of touch detections in frame units is sufficient. However, if the high detection accuracy is always maintained, a large amount of power will be consumed even in the non-touch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044G06F3/041
CPCG06F3/041G06F1/3262G06F3/04166G06F3/0446
Inventor 栋近功
Owner SYNAPTICS JAPAN GK