Touch screen, touch sensing device and a method of driving the same
AssigneeHimax Technologies Limited
InventorsChia-Wei Hu, Yaw-Guang Chang, Shen-Feng Tai, Wai Pan Wu
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Abstract
A touch sensing device includes a first conductive layer that acts as a common voltage layer in a display mode; and a second conductive layer electrically isolated from the first conductive layer, the second conductive layer having source lines that transfer data to be displayed in the display mode and act as transmitting (TX) electrode lines in a touch sensing mode. The first conductive layer includes RX electrode lines and blocks that are disposed among and separated by the RX electrode lines. The RX electrode lines and the blocks are electrically connected to a common voltage in the display mode.
Claims28
A touch screen, comprising:
- a first conductive layer that acts as a common voltage layer in a display mode;
- a second conductive layer electrically isolated from the first conductive layer, the second conductive layer having source lines that transfer data to be displayed in the display mode and act as transmitting (TX) electrode lines in a touch sensing mode;
- a light control layer disposed above the first conductive layer and the second conductive layer;
- and
- a driver that acts as a source driver to provide data to be displayed to the source lines in the display mode, and acts as a TX driver to provide transmitting signals in the touch sensing mode;
- wherein the first conductive layer includes a plurality of RX electrode lines and a plurality of blocks that are disposed among and separated by the plurality of RX electrode lines, the plurality of RX electrode lines and the plurality of blocks being electrically connected to a common voltage in the display mode.
A touch sensing device, comprising:
- a first conductive layer that acts as a common voltage layer in a display mode;
- and
- a second conductive layer electrically isolated from the first conductive layer, the second conductive layer having source lines that transfer data to be displayed in the display mode and act as transmitting (TX) electrode lines in a touch sensing mode;
- wherein the first conductive layer includes a plurality of RX electrode lines and a plurality of blocks that are disposed among and separated by the plurality of RX electrode lines, the plurality of RX electrode lines and the plurality of blocks being electrically connected to a common voltage in the display mode.
A method of driving a touch sensing device, which including a first conductive layer and a second conductive layer having source lines, the first conductive layer including a plurality of RX electrode lines and a plurality of blocks, the method comprising:
- electrically connecting the plurality of RX electrode lines and the plurality of blocks to a common voltage in a display mode;
- transferring data to be displayed through the source lines in the display mode;
- and
- floating at least one of the plurality of blocks in a touch sensing mode.
Dependencies are inferred from the claim text.