Touch display device and touch sensing circuit

A technology of touch display and touch sensing, which is applied in the direction of electronic switches, electrical components, static indicators, etc., can solve the problems of touch accuracy degradation of touch display devices, improve touch accuracy, improve the ability to resist electromagnetic noise, and remove electromagnetic noise Effect

Pending Publication Date: 2022-06-17
LG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the electronic device is adjacent to the touch display device, the touch accuracy of the touch display device may be degraded due to electromagnetic wave noise emitted not only from the touch display device but also from surrounding electronic devices.

Method used

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  • Touch display device and touch sensing circuit
  • Touch display device and touch sensing circuit
  • Touch display device and touch sensing circuit

Examples

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Embodiment Construction

[0042] In the following description of examples or embodiments of the invention, reference is made to the accompanying drawings, in which are shown by way of illustration specific examples or embodiments that can be practiced, and in which like reference numerals may be used The ampersands refer to the same or similar parts even though they are shown in different drawings from each other. Furthermore, in the following descriptions of examples or embodiments of the present invention, detailed descriptions of well-known functions and components involved herein will be omitted when it is determined that they would obscure the subject matter of some embodiments of the present invention. Terms such as "includes," "has," "includes," "consists of," and the like as used herein are generally intended to allow for the addition of other means, unless these terms are used with the term "only."

[0043] Terms such as "first", "second", "A", "B", "(A)" or "(B)" may be used herein to describe ...

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PUM

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Abstract

Embodiments of the present invention relate to a touch display device and a touch sensing circuit for applying to a touch display panel a no-load driving signal having a phase difference or an amplitude difference with a touch driving signal. According to the embodiment of the invention, the anti-electromagnetic noise capability can be improved, and the touch precision can be improved. The touch sensing circuit includes: a touch driving circuit configured to output a pulse-type touch driving signal to at least one touch electrode among a plurality of touch electrodes disposed on a touch display panel; and a no-load driving signal output circuit configured to output at least one no-load driving signal, the at least one no-load driving signal having a frequency equal to a frequency of the touch driving signal, and the at least one non-load driving signal has a phase difference or an amplitude difference with the touch driving signal.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims the benefit of and priority to Korean Patent Application No. 10-2020-0176069, filed in Korea on December 16, 2020, the entire contents of which are hereby incorporated by reference for all purposes as if Exactly the same in this article. technical field [0003] Embodiments of the present invention relate to a touch display device and a touch sensing circuit. Background technique [0004] With the development of the information society, demands for display devices that display images are gradually increasing in various forms, and in recent years, various display devices, such as liquid crystal display devices and organic light emitting display devices, are used. [0005] Recently, instead of conventional input methods such as buttons, mice, and keyboards, touch display devices that provide a simple touch input method in display have been used. [0006] The touch display device has high practica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041G06F3/044
CPCG06F3/04182G06F3/0448G06F3/0412G06F3/0443G06F3/04166G06F3/04184G06F3/044H03K17/962H03K2217/96072G06F3/0418G09G3/20G09G2310/08
Inventor 李正燮卞盛煜W.郑梁汉奎
Owner LG DISPLAY CO LTD
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