Liquid crystal display device with input function
AssigneesHitachi Displays, Ltd., Panasonic Liquid Crystal Displays Co., Ltd.
InventorsJun Tanaka, Shinji Sekiguchi, Norio Mamba
Life of this patent
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Abstract
In a liquid crystal display device having a built-in capacitive coupling touch sensor, a pair of facing transparent substrates sandwich a liquid crystal layer 113 and a liquid crystal display circuit for driving liquid crystal using a lateral electrical field having a color filter layer 107 is formed on one of the transparent substrates 101 in order to make the touch sensor highly sensitive to change in the capacitance, and a capacitive coupling touch sensor circuit layer 117 is formed on the other substrate 116, on the side opposite to the liquid crystal.
Claims8
A liquid crystal display device having a built-in capacitive coupling touch sensor, comprising a first transparent substrate and a second transparent substrate which sandwich liquid crystal, wherein
- switching elements made of thin film transistors aligned in a matrix,
- wire portions for the switching elements,
- transparent pixel electrodes that are electrically connected to the thin film transistors,
- a common electrode that faces the pixel electrodes with an insulating film in between,
- a color filter layer for a color display, and
- a liquid crystal alignment film on the surface on the liquid crystal side are provided on said first transparent substrate,
- transparent electrodes for said capacitive coupling touch sensor is formed on the surface of said second transparent substrate on the side opposite to said first transparent substrate, and
- a liquid crystal alignment film on the side opposite to said transparent electrodes is provided on the surface of said second transparent substrate on the other side.
A method for manufacturing a liquid crystal display device having a built-in capacitive coupling touch sensor, comprising the steps of
- forming switching elements of thin film transistors, wire portions for the switching elements, a color filter layer for color display, transparent pixel electrodes that are electrically connected to the thin film transistors, a common electrode that faces the pixel electrodes with an insulating film in between, and a liquid crystal alignment film on a first transparent substrate;
- forming transparent electrodes for the capacitive coupling touch sensor on one side of said second transparent substrate and a liquid crystal alignment film on the other side of said second transparent substrate;
- and
- pasting said first transparent substrate and said second transparent substrate together with liquid crystal in between.
Dependencies are inferred from the claim text.