Abstract: According to one embodiment, a display device includes a first substrate including a display area containing a plurality of pixels and a non-display area, a drive circuitry on the non-display area of the first substrate and connected to the plurality of pixels, a second substrate opposed to the first substrate, a touch sensor including detection electrodes on the second substrate, and a third substrate including first wiring lines connected to the detection electrodes and a heat radiation layer thermally connected to the drive circuitry.

Abstract: According to one embodiment, a display device includes a first substrate including a display area containing a plurality of pixels and a non-display area, a drive circuitry on the non-display area of the first substrate and connected to the plurality of pixels, a second substrate opposed to the first substrate, a touch sensor including detection electrodes on the second substrate, and a third substrate including first wiring lines connected to the detection electrodes and a heat radiation layer thermally connected to the drive circuitry.

Abstract: A liquid crystal display device having a plurality of pixels arranged in a matrix form includes a liquid crystal display panel which includes: a first substrate, a second substrate, and liquid crystal sealed between the first substrate and the second substrate. The second substrate includes detection electrodes for a touch panel. Each of the pixels has a pixel electrode and a counter electrode. The counter electrode is divided into a plurality of blocks. The counter electrode in each of the divided blocks is provided in common for the respective pixels in a plurality of consecutive display lines. The counter electrode in each of the divided blocks doubles as a scanning electrode for the touch panel. The liquid crystal display device includes means which, in a low-power standby mode, detects the presence of a touch by using only the plural detection electrodes.