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Touch screen device and method for driving the same

A touch screen and equipment technology, applied in the input/output process of data processing, instruments, calculations, etc., can solve problems such as different ranges of noise

Active Publication Date: 2015-03-18
LG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the range of the noise of the charge change of the touch sensor may vary slightly depending on the product

Method used

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  • Touch screen device and method for driving the same
  • Touch screen device and method for driving the same
  • Touch screen device and method for driving the same

Examples

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Embodiment Construction

[0020] Reference will now be made in detail to embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. It should be noted that detailed descriptions of known arts will be omitted if it is determined that the arts can mislead the embodiments of the present invention.

[0021] figure 1 is a block diagram schematically showing a display device and a touch screen device according to a first embodiment of the present invention. refer to figure 1 , the display device includes: a display panel DIS, a gate drive circuit 10, a data drive circuit 20, a timing controller 30, a host system 70, and the like. The touch screen device includes a touch screen panel (TSP), a touch driving circuit 40, a touch coordinate calculation unit 50, and the like.

[0022] First, a display device according to an embodiment of the present invention...

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PUM

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Abstract

A touch screen device includes a touch screen panel including Tx lines, Rx lines, and touch sensors formed at crossings of the Tx lines and Rx lines; a Tx driving circuit for supplying a driving pulse to the Tx lines; and an Rx driving circuit for sampling charge variations of the touch sensors, which are received through the Rx lines, and converting the received charge variations into touch raw data, wherein the Rx driving circuit includes: a noise filter that removes noise of signals received from the Rx line; an integrator that accumulates the charge variations passing through the noise filter; a sampling circuit that samples the accumulated charge variation of the integrator; and an analog to digital converter that converts the charge variation sampled by the sampling circuit into the touch raw data, the noise filter being a biquad bandpass filter including variable resistors and variable capacitors.

Description

technical field [0001] The present invention relates to a touch screen device and a method for driving the touch screen device. Background technique [0002] A user interface (UI) enables a human (user) to communicate with various electric and electronic devices so that the user can easily control the devices as the user likes. Representative examples of the user interface are a keypad, a keyboard, a mouse, an on-screen display (OSD), a remote controller with an infrared communication or a radio frequency (RF) communication function, and the like. User interface technology continues to evolve toward increased user sensitivity and ease of operation. Recently, user interfaces are evolving into touch UIs, voice recognition UIs, 3D UIs, and the like. Touch UI tends to be mandatory in portable information devices, and is also extended to electronic home appliances. [0003] As an example of a touch screen for implementing a touch UI, mutual capacitive touch screen devices that...

Claims

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Application Information

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IPC IPC(8): G06F3/044
CPCG06F3/0418G06F3/044G06F3/0412G06F3/04182G06F3/04184G06F3/0446G06F3/041
Inventor 李相龙姜亨远
Owner LG DISPLAY CO LTD