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Input device and liquid crystal display device

An input device and display device technology, applied in the input/output process of data processing, static indicators, instruments, etc., can solve the problems of resistance film degradation or damage, prevent the decline of display image quality, improve input accuracy, The effect of improving detection accuracy

Inactive Publication Date: 2015-01-07
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the resistive film method, since the touch position is detected by the mechanical contact of the resistive film, the resistive film may be deteriorated or damaged. In contrast, in the electrostatic capacitive coupling method, there is no contact between the detection electrode and other electrodes. The mechanical contact is also advantageous in terms of durability

Method used

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  • Input device and liquid crystal display device
  • Input device and liquid crystal display device
  • Input device and liquid crystal display device

Examples

Experimental program
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Embodiment approach

[0038] Hereinafter, as an example of an input device according to an embodiment of the present technology, a touch sensor used in a liquid crystal display device including a liquid crystal panel as a display panel will be described with reference to the drawings. In addition, this embodiment is only an illustration, and this technology is not limited to the structure shown in this embodiment.

[0039] figure 1It is a block diagram illustrating the overall configuration of a liquid crystal display device having a touch sensor function according to an embodiment of the present technology.

[0040] Such as figure 1 As shown, the liquid crystal display device includes a liquid crystal panel 1, a backlight (backlight) unit 2, a scanning line driving circuit 3, an image line driving circuit 4, a backlight driving circuit 5, a sensor driving circuit 6, a signal detection circuit 7 and a control device 8 .

[0041] The liquid crystal panel 1 is in the shape of a rectangular flat pl...

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Abstract

The purpose of the present invention is to enhance detection accuracy in an electrostatic capacitance coupling-type input device during a touch operation. Provided is an input device composed of a plurality of drive electrodes and a plurality of detection electrodes that intersect each other, and capacitive elements that are formed at intersections of the drive electrodes and the detection electrodes. During a touch detection period, the input device applies a drive signal to the drive electrodes of each line block of scanning signal lines and performs touch detection according to detection signals output from each detection electrode. The touch detection period is provided in a display update period in a horizontal scanning period of a display device. Further, the drive signal applied to the drive electrodes is selectively applied to a line block to which a scanning signal of the display device is not being applied.

Description

technical field [0001] The present invention relates to a capacitive coupling type input device for inputting coordinates on a screen, and a liquid crystal display device including the input device and a liquid crystal panel as a display element. Background technique [0002] Display devices equipped with input devices with screen input functions that input information by touching the display screen with the user's fingers, etc. are used in mobile electronic devices such as PDAs and portable terminals, various home appliances, and unmanned reception Fixed-placement customer guidance terminals such as mobile phones and the like. As such an input device based on a touch operation, there are known a resistive film method that detects a change in the resistance value of a touched part, an electrostatic capacitive coupling method that detects a change in capacitance, and an optical sensor that detects a change in the amount of light in a part that is shielded by a touch. various...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044G06F3/041
CPCG06F3/0412G06F3/044G06F3/04166G06F3/0445G06F3/0446G09G3/3648
Inventor 高木一树井上学小杉直贵中山贵仁渡海章笠原滋雄加道博行
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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