A display device comprises a light emitting diode (LED) which includes a porous semiconductor material, wherein the device comprises a pixel comprising a plurality of subpixels each having a light-emitting layer. A first subpixel has a first light-emitting layer having a first area A1, and a second subpixel has a second light-emitting layer having a second area A2 different from the first area A1. The first subpixel is configured to emit at a first peak wavelength, and the second subpixel is configured to emit at a second peak wavelength different from the first peak wavelength. A method of controlling this display device and a method of manufacturing said display device are also provided.

Disclosed is a display substrate including a display region which includes a light-transmitting display region; the display substrate includes multiple light emitting elements and multiple pixel circuits, the multiple light emitting elements include multiple first type light emitting elements located in the light-transmitting display region, the multiple pixel circuits include multiple first type pixel circuits located in the light-transmitting display region, at least one first type pixel circuit among the multiple first type pixel circuits is electrically connected with at least two first type light emitting elements emitting light of a same color, and the first type pixel circuit is configured to drive the at least two first type light emitting elements to emit light; an orthographic projection of at least one first type pixel circuit on a base substrate is overlapped with an orthographic projection of at least one first type light emitting element on the base substrate.

A display device includes first and second light-emitting units. An external quantum efficiency of the first light-emitting unit at a first current is less than at a second current. An external quantum efficiency of the second light-emitting unit at the first current is greater than at the second current. The first and second light-emitting units are operated at first and second operating currents respectively. When the first operating current is less than or equal to a threshold current, a quantity of the first light-emitting unit is greater than a quantity of the second light-emitting unit; and when the first operating current is greater than the threshold current, the quantity of the first light-emitting unit is less than the quantity of the second light-emitting unit. The first current is less than the second current. The threshold current is greater than the first current and less than the second current.

A display device includes a display panel including a circuit layer and a light-emitting element layer. The circuit layer includes a transistor, a connection electrode electrically connecting the transistor and the light-emitting element layer, a data line, and an insulating layer provided with a contact hole defined therethrough. The light-emitting element layer includes a first electrode electrically connected to the connection electrode through the contact hole, a light-emitting layer disposed on the first electrode, and a second electrode disposed on the light-emitting layer. The first electrode includes a first portion, a second portion extending from the first portion to a first direction, a third portion extending from the first portion to the first direction, and a fourth portion protruded from one of the first, second, and third portions.

A display panel is provided. The display panel includes a base substrate including a first display region, a second display region, and a transition region disposed between the first display region and the second display region; a first pixel unit disposed in the first display region, wherein the first pixel unit has a first aperture ratio; a second pixel unit disposed in the second display region, wherein the second pixel region has a second aperture ratio; and a third pixel unit disposed in the transition region, wherein the third pixel unit has a third aperture ratio; wherein the first aperture ratio is greater than the second aperture ratio; in a direction pointing from the first display region towards the second display region, the first aperture ratio, the third aperture ratio, and the second aperture ratio progressively decrease.

A display device includes a display region in which display pixels that emit visible light are arranged, and an adjacent region in which invisible light emitting pixels that emit at least invisible light in visible light and invisible light are arranged. The adjacent region is adjacent to the display region along an edge of the display region.

A display apparatus includes a circuit board including a driving circuit, a pixel array on the circuit board and including unit pixels, each of the unit pixels including a plurality of subpixels, and a plurality of microlenses respectively on the plurality of subpixels, where the pixel array further includes a plurality of light-emitting diode (LED) cells each respectively including a first conductivity-type semiconductor layer, an active layer, and a second conductivity-type semiconductor layer that are sequentially stacked, a passivation layer on side surfaces and lower surfaces of the plurality of LED cells, a reflective layer on the passivation layer, the reflective layer configured to emit light toward upper surfaces of the plurality of LED cells, a gap-fill insulating layer on the side surfaces and lower surfaces of the plurality of LED cells, and a first connection electrode on the gap-fill insulating layer, and connected to the first conductivity-type semiconductor layers.

A laser bonding device includes: a support unit configured to fix a substrate thereon; a pressurized head module configured to fix a light emitting element as a bonding object; a laser generating unit configured to irradiate a laser beam to a bonding member for bonding the light emitting element and the substrate; a temperature sensor configured to measure the temperature of the bonding member; and a control unit configured to control a power and time of a laser beam irradiated to the light emitting element based on data received from the temperature sensor.

A display includes: multiple light sources, a partition defining multiple pixel areas corresponding to the multiple light sources, respectively, a color conversion member disposed in some of the multiple pixel areas, a transparent member disposed in another some of the multiple pixel areas; a light-blocking member including multiple open areas corresponding to the multiple pixel areas, respectively, and multiple color filters placed in the multiple open areas, respectively. The multiple color filters may include a first color filter having a first size, and multiple second color filters each having a second size larger than the first size in a plan view. The first color filter overlaps the transparent member in the plan view, and the multiple second color filters overlap the color conversion member in the plan view.

A display panel and a display device including the same are disclosed. A display panel according to the present specification may include a first light-emitting element having a first size and implementing a first color, a second light-emitting element having a second size different from the first size and implementing a second color, a third light-emitting element having a third size different from the first size and implementing a third color, and a trench formed between the second light-emitting element and the third light-emitting element. According to the present specification, a design margin of a display device may be secured.