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Touch display device and display panel

專利號
US11175778B2
公開日期
2021-11-16
申請人
LG Display Co., Ltd.(KR Seoul)
發(fā)明人
Haewon Lee; JuHan Kim; Jinseong Kim
IPC分類
G06F3/041; G06F3/044
技術(shù)領域
shield,touch,sp,lines,pattern,tl,te,dl,electrodes,display
地域: Seoul

摘要

The present disclosure relates to touch display device and display panel. Provided are a touch display device and a display panel able to improve touch sensing performance by reducing crosstalk occurring between data lines and touch lines. A shield pattern is disposed in an area in which the touch lines overlap the data lines. A shield signal is applied to the shield pattern through shield lines in an area in which the shield pattern does not overlap the touch lines or the data lines. Direct capacitance is not formed between the touch lines and the data lines.

說明書

CROSS REFERENCE TO RELATED APPLICATION

This application claims priority from Republic of Korea Patent Application No. 10-2019-0136521, filed on Oct. 30, 2019, which is hereby incorporated by reference in its entirety.

BACKGROUND Field

The embodiments herein relate to a touch display device and a display panel.

Background Art

Along with the development of the information society, demand for various types of display devices for displaying images is increasing. In this regard, a range of display devices, such as liquid crystal display (LCD), plasma display panel (PDP), and organic light-emitting display have recently come into widespread use.

Such a display device has a touch-based user interface to detect a touch input to a display panel by a user and perform input processing based on the detected touch in order for more various functions.

Such a touch display device having a touch-based user interface may detect a user's touch input to a display panel using a plurality of touch electrodes disposed on the display panel (i.e. an on-cell touchscreen structure) or using a plurality of touch electrodes disposed in the display panel (i.e. an in-cell touchscreen structure).

For example, such a touch display device uses a touch driving circuit to apply a touch driving signal to touch electrodes through touch lines and detect changes in capacitance in response to a user's touch on the display panel. The touch display device may determine whether or not a touch is input (i.e. a touch event) to the display panel and determine a touch position on the display panel, on the basis of such changes in capacitance.

權(quán)利要求

1
What is claimed is:1. A touch display device comprising:a plurality of touch electrodes embedded in a display panel and spaced apart from each other;a plurality of touch lines connected to the plurality of touch electrodes to transfer a touch driving signal to the plurality of touch electrodes;a plurality of data lines overlapping the plurality of touch lines; anda shield pattern disposed between the plurality of touch lines and the plurality of data lines to overlap the plurality of data lines, wherein a shield signal is applied to the shield pattern through at least one shield line in an area not overlapping the plurality of touch lines or the plurality of data lines,wherein the at least one shield line is a backlight shield pattern disposed on a peripheral area of a pixel included in the touch display device.2. The touch display device according to claim 1, wherein the at least one shield line is a conductive line allowing the shield signal to be transferred therethrough.3. The touch display device according to claim 1, wherein the shield signal is a signal different from a common voltage.4. The touch display device according to claim 1, wherein the shield pattern is located over a color filter included in the touch display device.5. The touch display device according to claim 1, wherein an insulation layer having a predetermined thickness is provided between the plurality of touch electrodes and the plurality of touch lines.6. The touch display device according to claim 5, wherein the insulation layer is an organic film comprising a photo acrylic material or an inorganic film comprising silicon nitride.7. The touch display device according to claim 5, further comprising:a plurality of pixel electrodes provided over the insulation layer.8. The touch display device according to claim 7, wherein, if the insulation layer is higher than the plurality of touch lines, the plurality of touch electrodes are disposed coplanar with the plurality of pixel electrodes.9. The touch display device according to claim 5, wherein, if the insulation layer is lower than the plurality of touch lines, the plurality of touch electrodes above the plurality of touch lines have heights different from the plurality of touch lines.10. A display panel comprising:a plurality of touch electrodes spaced apart from each other;a plurality of touch lines connected to the plurality of touch electrodes to transfer a touch driving signal to the plurality of touch electrodes;a plurality of data lines overlapping the plurality of touch lines; anda shield pattern disposed between the plurality of touch lines and the plurality of data lines to overlap the plurality of data lines, wherein, a shield signal is applied to the shield pattern through at least one shield line in an area not overlapping the plurality of touch lines or the plurality of data lines,wherein the at least one shield line is a backlight shield pattern disposed on a peripheral area of a pixel included in the touch display device.11. The display panel according to claim 10, wherein the at least one shield line is a conductive line allowing the shield signal to be transferred therethrough.12. The display panel according to claim 10, wherein the shield pattern is located over a color filter.13. The display panel according to claim 10, wherein an insulation layer having a predetermined thickness is provided between the plurality of touch electrodes and the plurality of touch lines.14. The display panel according to claim 13, wherein the insulation layer is an organic film comprising a photo acrylic material or an inorganic film comprising silicon nitride.15. The display panel according to claim 13, further comprising a plurality of pixel electrodes provided over the insulation layer.16. The display panel according to claim 15, wherein, if the insulation layer is higher than the plurality of touch lines, the plurality of touch electrodes are disposed coplanar with the plurality of pixel electrodes.17. The display panel according to claim 13, wherein, if the insulation layer is lower than the plurality of touch lines, the plurality of touch electrodes above the plurality of touch lines have heights different from the plurality of touch lines.
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