Touch device and measuring voltage dynamic adjustment method thereof

A touch device and touch sensing technology, which is applied in the fields of electrical digital data processing, instruments, calculations, etc., can solve problems such as inability to exceed, inconvenient operation, power consumption of touch devices, etc.

Inactive Publication Date: 2014-12-03
ELAN MICROELECTRONICS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the capacitance change caused by the finger and the stylus to the touch panel are not the same, especially the capacitance change caused by the stylus is relatively small, when providing a fixed measurement generally designed for finger touch When the voltage is applied to the touch panel, the capacitance change generated by the stylus often cannot exceed a threshold value for determining the occurrence of a touch, which causes inconvenience in operation
To solve this problem, some manufacturers provide a higher fixed measurement voltage to the touch panel. Although this can effectively improve the capacitance change generated by the stylus, it will make the touch device consume more power.

Method used

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  • Touch device and measuring voltage dynamic adjustment method thereof
  • Touch device and measuring voltage dynamic adjustment method thereof
  • Touch device and measuring voltage dynamic adjustment method thereof

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Embodiment Construction

[0013] It should be noted that the following examples are used to illustrate the technical content of the present invention, but not to limit the scope of the present invention. Furthermore, in the following embodiments and drawings, components irrelevant to the present invention have been omitted and not shown, and the dimensional relationship among the components in the drawings is only for easy understanding, not to limit the actual scale.

[0014] figure 1 It depicts the touch device 1 according to the first embodiment of the present invention, which can be a mobile phone, a personal digital assistant, a tablet computer, an external touch panel or any device with a touch function. The touch device 1 includes a touch panel 11 , a touch sensing circuit 13 and a processing unit 15 . It should be noted that, based on the principle of simplification, other components of the touch device 1 , such as a communication module, an input module, a power supply module and components t...

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Abstract

A touch device and a measuring voltage dynamic adjustment method thereof are provided. The touch device comprises a touch panel, a touch sensing circuit and a processing unit. The touch sensing circuit electrically connected to the touch panel is configured to provide a first measuring voltage to the touch panel and sense capacitance variation of the touch panel to generate a plurality of sensing signals. The processing unit electrically connected to the touch sensing circuit is configured to receive the sensing signals, determine whether a touch is caused by a stylus according to the sensing signals and if yes, enable the touch sensing circuit to provide a second measuring voltage to the touch panel. The second measuring voltage is larger than the first measuring voltage.

Description

technical field [0001] The present invention relates to a touch device and a method for dynamically adjusting the measuring voltage thereof. In particular, it relates to a touch device, which judges the type of the object on the touch panel according to the sensing signal, and dynamically adjusts the measurement voltage according to the judgment result. Background technique [0002] In recent years, touch devices (such as personal digital assistants (PDAs), tablet computers, digital cameras, information appliances, mobile phones, etc.) have been widely used in daily life. The user can easily operate the touch device through touch. Among them, capacitive touch panels are widely used as touch panels of touch devices. [0003] In addition to operating the touch device by touching the touch panel with fingers, the user can also operate the touch device by touching the touch panel with a stylus. However, since the capacitance change caused by the finger and the stylus to the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041
CPCG06F3/044G06F3/03545G06F3/04166G06F3/0446
Inventor 叶仪晧黄柏瑄杨学伟简永烈
Owner ELAN MICROELECTRONICS CORPORATION
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