Abstract: A flat panel display with a built-in touch panel includes a display panel having a lower substrate, an upper substrate, and a plurality of touch sensing patterns on the upper substrate. The plurality of touch sensing patterns includes a plurality of sensing cells on a bottom surface of the upper substrate that faces the lower substrate, a plurality of outer lines on the bottom surface of the upper substrate that connect lines of sensing cells of the plurality of sensing cells along at least one of a first direction or a second direction to a driving circuit, a plurality of connection lines that correspond to respective outer lines on the lower substrate. The plurality of outer lines are connected to the driving circuit via the plurality of connection lines on the lower substrate, and the plurality of outer lines are electrically connected to the corresponding connection lines.

Abstract: A display device and a method of testing the display device. The display device includes a substrate including both a display region on which pixel cells are located and a peripheral region; test pads, main pins connected to the pixel cells, and dummy pins that are respectively connected to the test pads, the test pads, the main pins, and the dummy pins being on the peripheral region of the substrate, and visual test lines on the peripheral region of the substrate. The visual test lines include a first portion connected to the main pins and a second portion connected to the test pads, and the first and second portions are disconnected from each other.

Abstract: A display device and a method of testing the display device. The display device includes a substrate including both a display region on which pixel cells are located and a peripheral region; test pads, main pins connected to the pixel cells, and dummy pins that are respectively connected to the test pads, the test pads, the main pins, and the dummy pins being on the peripheral region of the substrate, and visual test lines on the peripheral region of the substrate. The visual test lines include a first portion connected to the main pins and a second portion connected to the test pads, and the first and second portions are disconnected from each other.

Abstract: A flat panel display with a built-in touch panel includes a display panel having a lower substrate, an upper substrate, and a plurality of touch sensing patterns on the upper substrate. The plurality of touch sensing patterns includes a plurality of sensing cells on a bottom surface of the upper substrate that faces the lower substrate, a plurality of outer lines on the bottom surface of the upper substrate that connect lines of sensing cells of the plurality of sensing cells along at least one of a first direction or a second direction to a driving circuit, a plurality of connection lines that correspond to respective outer lines on the lower substrate. The plurality of outer lines are connected to the driving circuit via the plurality of connection lines on the lower substrate, and the plurality of outer lines are electrically connected to the corresponding connection lines.

Abstract: A touch panel includes a first supporting substrate, a second supporting substrate that faces the first supporting substrate, a first transparent electrode formed on the first supporting substrate, a second transparent electrode formed on the second supporting substrate, a third transparent electrode formed between the first and second transparent electrodes, a medium layer formed between the first and third transparent electrodes, and a piezoelectric layer formed between the second and third transparent electrodes.

Abstract: A display panel assembly according to one or more embodiments includes a display panel and a protective film. The display panel converts information input by physical pressure into an electric signal and displays an image. The protective film includes a base disposed on the display panel and a protruding part protruding from a surface of the base facing the display panel. The protective film transfers the physical pressure from the exterior to the display panel.

Abstract: A touch panel includes a first supporting substrate, a second supporting substrate that faces the first supporting substrate, a first transparent electrode formed on the first supporting substrate, a second transparent electrode formed on the second supporting substrate, a third transparent electrode formed between the first and second transparent electrodes, a medium layer formed between the first and third transparent electrodes, and a piezoelectric layer formed between the second and third transparent electrodes.