Title:
LIQUID CRYSTAL DISPLAY DEVICE WITH BUILT-IN TOUCH SENSING FUNCTION AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/179510
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a liquid crystal display device with a built-in touch sensing function, which is able to hold stable touch sensor sensitivity while preventing occurrence of electrostatic unevenness even when being exposed to a wet heat environment. Provided is a liquid crystal display device with a built-in touch sensing function. This liquid crystal display device is equipped with: a liquid crystal layer including liquid crystal molecules; a touch sensor part; and first and second polarizing films respectively disposed on both sides of the liquid crystal layer. The first polarizing film is disposed on the viewing side of the liquid crystal layer, and closer to the viewing side than the touch sensor part. A conductive layer is disposed closer to the viewing side than the touch sensor part. Regarding the conductivity layer, a wet heat conductivity change ratio FHT expressed by the following formula (1) is 2 or less. FHT = ΔC(B)/ ΔC(A) ….. (1) (In formula (1), ΔC(B) is a difference between a touch panel current value after a wet heat test and a touch panel base current value, and ΔC(A) is a difference between a touch panel current value before the wet heat test and the touch panel base current value.)
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Inventors:
YAMAMOTO SATOSHI (JP)
KIMURA TOMOYUKI (JP)
TOYAMA YUSUKE (JP)
KIMURA TOMOYUKI (JP)
TOYAMA YUSUKE (JP)
Application Number:
PCT/JP2020/007127
Publication Date:
September 10, 2020
Filing Date:
February 21, 2020
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
G02F1/1343; C08L65/00; G02F1/1333; G06F3/041
Domestic Patent References:
| WO2017057097A1 | 2017-04-06 |
Foreign References:
| JP2015117367A | 2015-06-25 | |||
| KR20170076340A | 2017-07-04 |
Attorney, Agent or Firm:
OI, Michiko (JP)
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