Display device with touch detection function and electronic device having same

A technology for touch detection and display device, which is applied in the direction of electrical digital data processing, input/output process of data processing, instruments, etc. , the effect of improving performance and improving accuracy

Inactive Publication Date: 2017-01-11
JAPAN DISPLAY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the time during display operation and touch detection becomes shorter, it is difficult to improve display performance and touch detection performance

Method used

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  • Display device with touch detection function and electronic device having same
  • Display device with touch detection function and electronic device having same
  • Display device with touch detection function and electronic device having same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0144] (Effect of Embodiment 1)

[0145] The display device 1 with a touch detection function performs noise detection operation during the noise detection period Pn to detect the frequency of the touch detection driving signal Vcomd of disturbance noise, thereby suppressing the decrease in accuracy of the touch detection operation due to disturbance noise. For example, in this embodiment, when the frequency component of the disturbance noise is detected from the detection signal Vdet and the frequency component of the touch detection driving signal Vcomt is the same as or near the frequency, by changing the frequency of the touch detection driving signal Vcomt to be different The frequency can prevent erroneous operation caused by interference noise in the touch detection operation.

[0146] Furthermore, since the noise detection operation can be performed together with the display operation during the display operation period Pd, it is possible to prevent the display operati...

Embodiment approach 2

[0163] (Effect of Embodiment 2)

[0164] With the above-mentioned configuration and operation, as the filtering function of the analog filter unit 42, even if it does not have the function of not passing the frequency component of the frequency component of the LCD noise at which the noise intensity appears as a peak among the frequency components of the LCD noise as in the first embodiment, and not passing the detection signal The function of passing the frequency component of the signal of the touch detection electrode TDL accompanying the display drive signal Vcomd output from the drive electrode driver 14 among the frequency components of Vdet can also obtain the same effect as that of the first embodiment.

[0165]

[0166] Figure 22 It is a cross-sectional view showing a schematic cross-sectional structure of a display with a touch detection function according to a modified example. In the modified example, the driving electrode COML functions as a common driving ele...

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PUM

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Abstract

The present invention provides a display device with a touch detection function and an electronic device capable of improving display performance and touch detection performance, which include: a pixel electrode to which a pixel signal for causing a plurality of display elements to perform a display operation is applied ; a touch detection electrode for detecting whether an external object is in contact with or approaching; a display drive section which outputs a pixel signal synchronized with a display drive signal to the pixel electrode, thereby performing a display operation; an operation drive section which applies a display drive during the display operation signal, thereby performing a display operation, and applying a touch detection drive signal during touch detection, thereby performing a touch detection operation; a touch detection part, which detects a detection signal output by a touch detection electrode; a control part, which makes the display operation period and touch detection The period is performed in a time-division manner, wherein the touch detection unit performs a noise detection operation of detecting disturbance noise attached to the touch detection electrodes during the display operation.

Description

technical field [0001] The present invention relates to a display device with a touch detection function capable of detecting an external approaching object based on a change in electrostatic capacitance, and an electronic device provided with the display device. Background technique [0002] In recent years, a display device with a touch detection function has attracted attention. In such a display device, a touch detection device called a touch panel is mounted on a display device such as a liquid crystal display device, or a touch panel is integrated with a display device. A display device with a touch detection function can replace ordinary mechanical buttons for information input by displaying various button images and the like on the display device. Such a display device with a touch panel does not require an input device such as a keyboard, a mouse, or a keypad, and is therefore widely used in portable information terminals such as mobile phones in addition to compute...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/044
CPCG06F3/0412G06F3/04182G06F3/04184G06F3/0445G06F3/0446G06F3/04166G06F3/0418
Inventor 野口幸治安住康平
Owner JAPAN DISPLAY INC
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