14results about How to "Increase the driving voltage" patented technology

The application relates to the technical field of organic light-emitting display, and discloses a cyano-substituted aryl ring-connected triazine compound and application thereof. The cyano-substituted aryl ring-connected triazine compound has a structure as shown in formula (I), the compound provided by the application has high bond energy between atoms, good thermal stability, is conducive to solid-state stacking between molecules, is conducive to injection and migration of excitons, can effectively reduce the driving voltage of an organic electroluminescent device when used as an electron transport material, improves the light-emitting efficiency of the organic electroluminescent device, and prolongs the service life of the organic electroluminescent device. Meanwhile, the cyano substitution can adjust the energy level of the compound, the HOMO and LUMO energy levels are deepened, the compound is more matched with adjacent layers, and the device voltage is reduced. The application further provides an organic electroluminescent device and a display device containing the compound of formula (I).

The application provides a compound of formula (I), the bond energy between atoms is high, the compound has good thermal stability, and the solid-state stacking between molecules is favorable, and the energy level between adjacent layers is suitable, which is favorable for the injection and migration of excitons. When used as an electron transport material, the compound can effectively reduce the driving voltage of an organic electroluminescent device, improve the light-emitting efficiency of the organic electroluminescent device, and prolong the service life of the organic electroluminescent device. The application also provides an organic electroluminescent device and a display device comprising the compound of formula (I).

The application provides a compound containing a fluorene group and an organic electroluminescent device thereof. The compound of the application contains at least one or more deuterium atoms in the structure, has higher electron mobility, and can effectively enhance the electron transport capacity of the organic electroluminescent device. The compound of the application can be applied to a light-emitting layer and an electron transport region, can effectively reduce the driving voltage of the organic electroluminescent device, improve the light-emitting efficiency, and can significantly increase the service life of the device, thereby enhancing the durability of the device. It can be widely applied to the field of information display technology, such as mobile phones, tablet computers, televisions, wearable devices, VR, vehicle displays and tail lights, etc.

The present invention provides an organic light-emitting device, comprising: an anode; a cathode disposed opposite to the anode; and a light-emitting layer disposed between the anode and the cathode, wherein the light-emitting layer contains two host compounds, thereby improving the efficiency, driving voltage and lifetime characteristics of the organic light-emitting device.

This application discloses a pre-start control circuit, method, device, and auxiliary lamp for a lamp module. The application relates to the field of auxiliary lamp control technology. The pre-start control circuit includes: a drive voltage supply circuit connected to the drive switch of the lamp module, used to provide drive voltage to the drive switch; a current sampling circuit connected to the drive switch, used to collect the operating current of the drive switch; and a main control module connected to both the drive voltage supply circuit and the current sampling circuit, used to gradually output control signals after receiving the lamp module's turn-on signal, so that the drive voltage supply circuit gradually increases the drive voltage according to the control signals until the operating current of the drive switch reaches a target current; the target current is less than or equal to the maximum current that the drive switch can withstand. This application can improve the reliability of lamp module control.

This invention provides a composition, an organic electroluminescent device, and a display device. The composition comprises a first compound having the structure shown in Formula I: A specific composition was used as the light-emitting layer material for OLED light-emitting devices, resulting in OLED light-emitting devices with a lower lifetime voltage growth.

An optical device includes an active layer that includes at least two outer barriers and at least one coupled quantum well that is inserted between the at least two outer barriers. Each coupled quantum well includes at least three quantum well layers and at least two coupling barriers that are respectively provided between the at least three quantum well layers. Thicknesses of two quantum well layers disposed at opposite end portions of the at least three quantum well layers are less than a thickness of the other quantum well layer disposed between the two quantum well layers disposed at the opposite end portions. A bandgap of the two quantum well layers disposed at the opposite end portions may be higher than a bandgap of the other quantum well layer disposed between the two quantum well layers.

This invention relates to the field of organic optoelectronic materials technology, specifically to a fluorene-containing aromatic amine compound and its organic electroluminescent device. The fluorene-containing aromatic amine compound provided by this invention possesses an appropriate hole mobility, effectively improving the charge transport efficiency of the device, thereby improving the driving voltage and luminous efficiency. It also possesses appropriate HOMO and T1 values, enabling good energy level matching with adjacent organic functional layers. When adjacent to the luminescent layer, it can also block exciton migration to the interface between the luminescent layer and the exciton layer, preventing interfacial luminescence and avoiding device aging caused by heat generated by interfacial luminescence, further improving the device's driving voltage, luminous efficiency, and lifespan. Furthermore, the fluorene-containing aromatic amine compound provided by this invention also exhibits excellent thermal and chemical stability, allowing it to be used over a wide temperature range and in environments containing water, oxygen, and other corrosive gases, thereby delaying device aging and improving device lifespan.

The present disclosure provides a composition for an organic light emitting device and an organic light emitting device comprising the same.

The present invention can provide an organic electroluminescent element comprising a light-emitting layer containing multiple substrates and multiple dopants, and an electron transport auxiliary layer disposed between the light-emitting layer and an electron transport region. By organically controlling the aforementioned substrates, dopants and electron transport auxiliary layer to each have a predetermined energy level and an appropriate bandgap, the driving voltage, luminous efficiency and lifetime characteristics of the element are optimized.

The present specification relates to compounds of Chemical Formula 1 and organic light emitting devices comprising the same.

The present application provides a compound and an organic light emitting device using the same. The compound is represented by the following chemical formula:

This application belongs to the field of organic electroluminescence technology, and relates to an organic compound and an organic electroluminescent device and electronic device using the same. The organic compound has a structure as shown in Formula 1. Using the organic compound in an organic electroluminescent device can significantly improve the performance of the organic electroluminescent device.