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Touch controller, and display driving circuit and display device and system having the touch controller

A technology for display driving and touch display, which is applied to circuits, instruments, electrical components, etc., and can solve problems such as reducing the sensing sensitivity of the touch screen system 10

Active Publication Date: 2011-01-05
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aforementioned noise may reduce the sensing sensitivity of the touch screen system 10

Method used

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  • Touch controller, and display driving circuit and display device and system having the touch controller
  • Touch controller, and display driving circuit and display device and system having the touch controller
  • Touch controller, and display driving circuit and display device and system having the touch controller

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Embodiment Construction

[0046] Hereinafter, exemplary embodiments of the inventive concept will be described in detail with reference to the accompanying drawings. Like reference numerals refer to like elements throughout the drawings.

[0047] Figure 2A A parasitic capacitance component generated in each of the plurality of sensing units SU of the touch screen panel 21 according to an embodiment of the inventive concept is shown. Figure 2B is showing Figure 2A The graph of the variation of the capacitance of the sensing unit SU when the sensing unit SU is touched. Figure 2C is showing Figure 2A The graph of the variation of the capacitance of the sensing unit SU when the sensing unit SU is touched and generates noise.

[0048] refer to Figure 2A , the touch screen panel 21 includes a plurality of sensing units SU. The plurality of sensing units SU may be arranged close to or on the display panel 22 displaying an image. For example, reference numeral '22' may represent an upper panel of ...

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PUM

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Abstract

A system and method include a display driver configured to be used in touch display equipment including touch-screen and display panel. The display driver comprises: a display driver for controlling display panel and generating controlling / timing signal; and a touch-screen controller for generating sensing data form the sensor input provided by the touch-screen. The sensor input is a sensor capacitance including touch capacitance, variable noise capacitance and background capacitance. The generation of sensor data comprises: reducing background capacitance level during generating output voltage from the sensor input, and / or removing variable noise voltage corresponding to the variable noise capacitance from the output voltage during converting the output voltage into sensing data.

Description

technical field [0001] The inventive concept relates to a touch controller, and more particularly, to a touch controller having enhanced sensing sensitivity, and a display driving circuit, a display device, and a system including the touch controller. Background technique [0002] Flat panel display devices have replaced cathode ray tubes (CRTs) due to the need for thinner and lighter display devices. Examples of flat panel display devices include liquid crystal displays (LCDs), field emission displays (FEDs), organic light emitting diodes (OLEDs), and plasma display panels (PDPs). [0003] Generally, the above-mentioned flat panel display device includes a plurality of pixels arranged in a matrix to display images. In an example of a flat-panel display device—a liquid crystal display, a plurality of scan lines for transmitting gate selection signals and a plurality of data lines for transmitting grid (gratin) data intersect each other, thereby forming multiple pixels. ...

Claims

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Application Information

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IPC IPC(8): G09G5/00G06F3/044
CPCG02F1/13338G09G3/2092G06F3/044G06F3/0418G09G2310/08G06F3/0412G06F3/0446G06F3/04184H10K59/40G06F1/3215G06F1/3237G06F1/3265G09G3/2007G09G2354/00
Inventor 金亨来崔伦竞曹和铉金相佑安海镛权亨达朴钟刚卞山镐刘载锡
Owner SAMSUNG ELECTRONICS CO LTD
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