US 11,899,880 B2 · Liquid crystal display device

Abstract

A liquid crystal display device includes a liquid crystal layer provided between a first substrate and a second substrate, a detection electrode configured to detect an external proximity object, a plurality of pixels overlapping the detection electrode in plan view, and a detection circuit configured to detect a detected capacitance value generated in the detection electrode. A liquid crystal capacitance value generated between each of the pixels and the detection electrode includes a first capacitance value at a first gradation and a second capacitance value at a second gradation smaller than the first gradation, and the detection circuit corrects the detected capacitance value based on a ratio between number of pixels with the first gradation and number of pixels with the second gradation out of the pixels.

Claims12

Dependent claims

A liquid crystal display device comprising:

a liquid crystal layer provided between a first substrate and a second substrate;
a detection electrode configured to detect an external proximity object;
a plurality of pixels overlapping the detection electrode in plan view;
and
a detection circuit configured to detect a detected capacitance value generated in the detection electrode, wherein
a liquid crystal capacitance value generated between each of the pixels and the detection electrode includes a first capacitance value at a first gradation and a second capacitance value at a second gradation smaller than the first gradation, and
the detection circuit corrects the detected capacitance value based on a ratio between number of pixels with the first gradation and number of pixels with the second gradation out of the pixels.

4 more elements

A liquid crystal display device comprising:

a liquid crystal layer provided between a first substrate and a second substrate;
a detection electrode configured to detect an external proximity object;
a plurality of pixels overlapping the detection electrode in plan view;
and
a detection circuit configured to detect a detected capacitance value generated in the detection electrode, wherein
a capacitance value at a predetermined gradation of each of the pixels is used as a reference capacitance value of a liquid crystal capacitance value generated between the pixel and the detection electrode, and
the detection circuit corrects the detected capacitance value by calculating, for each of the pixels, a difference between the liquid crystal capacitance value of the pixel at a detection timing of the detected capacitance value and the reference capacitance value, adding up the differences of the respective pixels, and subtracting the added value from the detected capacitance value.

4 more elements

Dependencies are inferred from the claim text.

Liquid crystal display device

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Liquid crystal display device

Life of this patent

Abstract

Claims12