Abstract: The present disclosure provides a display device and a method of manufacturing a display device. A display device according to one embodiment of the present specification may include a substrate including a display area and a non-display area around the display area, a signal line located in the display area, a test pad located in the non-display area, and a connection line located in the non-display area and configured to electrically connect the test pad and the signal line. The test pad may include a bank, a first layer, which is the connection line, disposed on the bank, a photoresist layer disposed on the first layer and including a pattern area, and a second layer disposed on the photoresist layer. The pattern area may have a positive taper cross-section, and the first layer and the second layer are in contact with each other in the pattern area.

Abstract: A test element may include a base layer, a bank on a portion of the base layer, a first layer on the base layer and on the bank, a photoresist layer on the first layer, the photoresist layer including a patterned area; and a second layer positioned on the photoresist layer. A height of a first area of the first layer on the bank may be greater than a height of a second area of the first layer on the base layer.

Abstract: A display apparatus includes a plurality of pixel driving circuits and at least one dummy pixel driving circuit disposed apart from each other on a substrate, a plurality of driving wires disposed corresponding to the plurality of pixel driving circuits, and a test wire electrically connected to the dummy pixel driving circuit.

Abstract: A display apparatus according to one or more examples includes a substrate; a display area, and a non-display area outside the display area; a loopback wire located in the non-display area; and a pad connection wire in the non-display area. The pad connection wire may have a length that is different from the length of the loopback wire.

Abstract: A display device and a test method of the display device are discussed. The display device can include a substrate having a display region and a non-display region, a circuit layer disposed in the display region and the non-display region, a plurality of banks disposed on the circuit layer, and a plurality of pixels each including a plurality of light-emitting elements disposed on the plurality of banks in the display region. The first electrodes of the plurality of pixels are connected to the anode electrodes of the plurality of light-emitting elements, and the second electrodes of the plurality of pixels are connected to the cathode electrodes of the plurality of light-emitting elements. Adjacent second electrodes of the pixels are disposed to face each other and are spaced apart from each other.

Abstract: The disclosure discloses a display device including a substrate, a circuit layer disposed on the substrate, and a plurality of banks disposed on the circuit layer. A plurality of light-emitting elements is disposed on the banks, each having a first electrode and a second electrode. A contact electrode is disposed on the bank and is electrically connected to the first electrode. The contact electrode includes a contact opening. An optical layer covers side surfaces of the plurality of light-emitting elements and the contact electrode, and includes a contact hole aligned with the contact opening of the contact electrode. The contact electrode is electrically connected with the second electrode through the contact hole of the optical layer. A transparent conductive layer is not present in the region of electrical connection between the contact electrode and the second electrode. This structure improves adhesion and maintains the structural integrity of the optical layer.

Abstract: A display panel may include a substrate, a circuit layer disposed on the substrate, a plurality of light-emitting elements disposed on the circuit layer and electrically connected to the circuit layer, an optical layer surrounding the light-emitting elements, a first inorganic film layer disposed on the optical layer, and a second inorganic film layer disposed under the optical layer. Insulating layers of the circuit layer and a side surface of the optical layer may be exposed on at least one of side surfaces of the substrate, and a stepped portion of the optical layer may be present between outermost ends of the first inorganic film layer and the second inorganic film layer and at least one of outermost side surfaces of the substrate. A method of manufacturing a display panel and a display device include a display panel are also disclosed.

Abstract: The present specification provides a display panel and a display device including the same, and the display panel includes a circuit layer disposed on a substrate and a plurality of light emitting diodes disposed on the circuit layer, wherein the circuit layer includes a plurality of driving lines disposed on the substrate and electrically connected to the light emitting diodes disposed in a display area among the plurality of light emitting diodes and a plurality of non-driving lines disposed on the substrate in a non-display area outside the display area, and at least one of the non-driving lines includes a plurality of dummy floating lines electrically separated from the light emitting diodes and the driving lines.

Abstract: The disclosure discloses a display device. The disclosure includes a substrate, a circuit layer on the substrate, and a plurality of banks on the circuit layer. One or more light-emitting elements, each having a first electrode and a second electrode, are disposed one-to-one on the banks. A contact electrode is on the circuit layer, spaced apart from the banks. A first optical layer covers the banks and the light-emitting elements on the banks. A second optical layer covers the first optical layer and includes a contact hole that exposes a portion of the contact electrode. The structure is configured such that, when the distance between the bank and the first optical layer on a surface of the circuit layer is defined as 1, the distance between the first optical layer and the contact hole on the same surface ranges from 0.5 to 2.5, thereby supporting improved structural integrity and reliability.

Abstract: A display device includes a substrate including a display area and a non-display area, a plurality of pixels in the display area, wherein each pixel of the plurality of pixels includes a plurality of sub-pixels, at least one driving circuit unit configured to drive the plurality of pixels, a first protrusion and a second protrusion that are disposed in at least one pixel of the plurality of pixels, a first electrode formed on the first protrusion and the second protrusion, a light emitting unit disposed on the first electrode, and a second electrode disposed on the light emitting unit and connected to the light emitting unit, wherein the first protrusion and the second protrusion may have different widths in a second direction.