Abstract: A piezoelectric material composition may be represented by Equation 1. A piezoelectric device may include a piezoelectric device layer including the piezoelectric material composition represented by Equation 1, a first electrode disposed at a first surface of the piezoelectric device layer, and a second electrode disposed at a second surface different from the first surface of the piezoelectric device layer. a ? PbZrO 3 - b ? PbTiO 3 - ( 1 - a - b ) ? Pb ( Ni c ? Nb 1 - c ) ? O 3 + x ? mol ? % ? A + y ? vol ? % ? BaTiO 3 [ Equation ? 1 ] where A is Fe2O3, Co2O3, Mn2O3, ZnO, GeO2, CuO, or NiO, and 0.15?a?0.24, 0.29?b?0.38, 0.30?c?0.35, 0.00?x?3.00, and 0.00?y?7.00.

Abstract: Provided is a display panel including a base substrate, a circuit element layer disposed on the base substrate, a pixel defining layer disposed on the circuit element layer and including a light-emitting opening, a light-emitting element disposed on the circuit element layer and including a first electrode, a second electrode facing the first electrode, and a functional layer disposed between the first electrode and the second electrode, a metal pattern layer disposed on the pixel defining layer, and a low thermal conductive layer disposed between the pixel defining layer and the metal pattern layer, thereby having excellent display quality.

Abstract: A display device in one example includes a substrate having a display area allowing an image to be displayed and a non-display area located outside of the display area. The display device further includes a light emitting element disposed in the display area of the substrate, and an encapsulation layer on the light emitting element and extending into the non-display area. Further, the display device includes a first metal dam disposed in the non-display area and located further away from the display area than the encapsulation layer in the non-display area. This configuration enables a bezel area to be extremely reduced.

Abstract: A display device includes a first electrode and a second electrode spaced apart from each other, and light emitting elements disposed between the first electrode and the second electrode. Each of the light emitting elements include a first semiconductor layer, a second semiconductor layer disposed on the first semiconductor layer, and an active layer disposed between the first semiconductor layer and the second semiconductor layer. Each of the light emitting elements emits light with a wavelength in a range of about 464 nm to about 468 nm at a current density in a range of about 0.5 A/cm2 to about 100 A/cm2, and has a maximum external quantum efficiency greater than or equal to about 15%.

Abstract: A display device includes a first light emitting element group including at least one first light emitting element emitting a first light having a central wavelength greater than 450 nm and less than about 485 nm, a second light emitting element group including at least one second light emitting element emitting a second light having a central wavelength of about 450 nm or less, a third light emitting element group including at least one third light emitting element emitting a third light having a central wavelength of about 450 nm or less, and a color conversion layer disposed on the first, the second, and the third light emitting element group and including a first color conversion pattern which converts the second light emitted from the second light emitting element group and a second color conversion pattern which converts the third light emitted from the third light emitting element group.

Abstract: A method of inkjet printing includes applying a driving signal to a head through a controller, the head including nozzles, driving the head in response to the driving signal, and applying a first control signal that changes a driving waveform of the driving signal to the head through the controller.

Abstract: The display device can include a substrate, a first assembling wiring on the substrate, a second assembling wiring on the first assembling wiring, an insulating layer between the first assembling wiring and the second assembling wiring, a partition wall disposed on the second assembling wiring and having an assembly hole, and a semiconductor light-emitting device in the assembly hole. A part of the second assembling wiring can be disposed at a center of the assembly hole, and a width of a part of the second assembling wiring can be smaller than a diameter of the assembly hole.

Abstract: A display apparatus includes a substrate including a non-display area surrounding a display area, a display element layer disposed on the substrate in the display area and including at least one display element, an encapsulation layer disposed on the display element layer and including at least one inorganic encapsulation layer and at least one organic encapsulation layer, a color conversion-transmissive layer disposed on the encapsulation layer and configured to convert light emitted from the at least one display element into another color, a color filter layer disposed on the color conversion-transmissive layer, and an overcoat layer disposed on the color filter layer and extending from the display area to the non-display area, wherein the overcoat layer comprises a plurality of grooves in the non-display area.

Abstract: A display apparatus includes a display panel, a first cover plate covering an upper surface of the display panel and including a step portion disposed at an edge portion of the first cover plate, a second cover plate covering a lower surface of the display panel and including a protrusion portion disposed on an upper surface of the second cover plate and not overlap the first cover plate, and a side-surface covering member at least partially covering a portion of a side surface of the display panel which is exposed between the step portion and the protrusion portion.

Abstract: A thin film transistor includes an oxide semiconductor layer having a polycrystalline structure over a substrate, a gate electrode over the oxide semiconductor layer, and a gate insulating layer between the oxide semiconductor layer and the gate electrode. The oxide semiconductor layer includes a first region having a first carrier concentration and overlapping the gate electrode, a second region having a second carrier concentration and not overlapping the gate electrode, and a third region between the first region and the second region and overlapping the gate electrode. The second carrier concentration is larger than the first carrier concentration. A carrier concentration of the third region decreases from the second region to the first region in a channel length direction. A length of the third region is greater than or equal to 0.00 ?m and less than or equal to 0.60 ?m in the channel length direction.

Abstract: A mask frame includes: a frame main body that supports a mask; an insulating layer that blocks energy from being transmitted to the frame main body, and an absorption layer that absorbs energy from external light, wherein the insulating layer is disposed between a first surface of the frame main body and the absorption layer.

Abstract: A laser processing apparatus provides a laser unit, a vibration mirror module, a focusing module, and a processing platform. The laser unit emits a laser pulse beam. The vibration mirror module, positioned on the path of the laser pulse beam, reflects the laser pulse beam and has a first mode and a second mode configured to reflect the laser pulse beam into a first beam while the module is in the first mode or alternatively, into a second beam while the module is in the second mode. The first beam and the second beam travel in different directions. The focusing module receives the second beam reflected by the vibration mirror module in the second mode and focuses the second beam onto a focus. The processing platform is positioned at the focus to bear a to-be-processed device, upon which the second beam is cast.

Abstract: The disclosure relates to a mask assembly and a method of manufacturing the mask assembly. A mask assembly includes a frame including a frame opening, and an open mask including cell openings overlapping the frame opening. The open mask further includes support portions overlapping remaining cell openings except a first cell opening among the cell openings.

Abstract: A display device in one example includes a display panel having pixels on a substrate being divided into a first area at a center area and a second area adjacent to the first area. The display panel further includes a gate driver having stages configured to supply a gate signal to the pixels through gate lines. Each of the stages included in the gate driver is disposed in a gate area that at least partially overlaps the first area and the second area. The pixels include first pixels disposed on the first area and second pixels disposed on the second area. Further, the first pixels can be disposed in the first area at a first density and the second pixels can be disposed in the second area at a second pixel density being lower than the first pixel density.

Abstract: A pixel circuit includes a first transistor including a control electrode electrically connected to a first node, a first electrode electrically connected to a second node and a second electrode electrically connected to a third node, a second transistor configured to apply a first data voltage to the first transistor, a third transistor electrically connected to the first node and the third node, a fourth transistor including a control electrode electrically connected to a fourth node, a first electrode electrically connected to a fifth node and a second electrode electrically connected to a sixth node, a fifth transistor configured to apply a second data voltage to the fourth transistor, a sixth transistor electrically connected to the fourth node and the sixth node and a light emitting element that emits light based on the first data voltage and the second data voltage.

Abstract: A driving method for a display panel, a pixel driving circuit, and a display panel are provided. An image to be displayed is divided into multiple consecutive display stages, a first control signal is provided for 1st to (N?1)-th subframes, a second control signal is provided for the N-th subframe, and different pixel data structures are obtained for different display stages. A first control signal is a pulse width modulation (PWM) signal, and a second control signal is a pulse amplitude modulation (PAM) signal. Accordingly, the display performance is effectively enhanced.

Abstract: A slidable display device in one example includes a display panel assembly including a display panel having a first display area and a second display area extending from the first display area, and a mounting frame. The display panel assembly can be movable in the mounting frame between a first position and a second position, the first position corresponding to a position in which the first display area extends beyond the mounting frame at a predetermined angle with respect to a portion of the second display area, and the second position corresponding to a position in which the first display area and the second display area extend at the predetermined angle beyond the mounting frame.

Abstract: The present disclosure provides a display compensation method for a display panel, a method for generating a compensation data table, and a display device. A first display luminance corresponding to a first to-be-compensated sub-pixel set and a second display luminance corresponding to a second to-be-compensated sub-pixel set are respectively compensated by corresponding compensation data tables in different viewing angles. A plurality of first compensation data tables corresponding to the first viewing angle and a plurality of second compensation data tables corresponding to the second viewing angle are used to compensate for the first to-be-compensated sub-pixel set and the second to-be-compensated sub-pixel sets adjacent with each other.

Abstract: The present application provides a display device and a driver. The display device includes a display panel and a driver, where the driver includes both a data signal output module and a resistance control module. The data signal output module outputs a plurality of data signals to a plurality of signal lines located in a fan-out region of the display panel. The resistance control module is electrically connected to the data signal output module and the plurality of signal lines to provide different line impedance for the plurality of data signals output by the data signal output module.

Abstract: A display device may include a display panel including a plurality of pixels; and a data driver circuit configured to supply a data signal to the plurality of the pixels through data lines. A gate driver circuit, configured to supply a gate signal to the plurality of the pixels through gate lines, is disposed in the display panel. The display panel includes a driving layer including a gate area having the gate driver circuit; and a pixel circuit layer including an active area having a pixel area in which each of the plurality of pixels is disposed and a non-active area around the active area. The pixel circuit layer includes a light emitting diode, a clock line configured to supply a clock signal to the gate driver circuit, and a shielding pattern between the light emitting diode and the clock line.