305results about How to "Luminous stability" patented technology

A load driving circuit and a multi-load feedback circuit is disclosed. The load driving circuit and the multi-load feedback circuit are adapted to drive a LED module that has a current balancing circuit for balancing the currents flowing through LEDs. The load driving circuit and the multi-load feedback circuit modules the electric power transmitted by the LED driving apparatus to a LED module according to voltage level(s) of current balancing terminals having insufficient voltage in the current balancing circuit, and so the voltage levels of the current balancing terminals are higher than or equal to a preset voltage level, further increasing the efficiency thereof.

The invention discloses an organic light emitting display panel. The organic light emitting display panel comprises a substrate and a driving thin film transistor, a switching thin film transistor, a storage capacitor and an organic light emitting device which are formed on the substrate; an external voltage signal passes through the switching thin film transistor to be stored in the storage capacitor; the external voltage signal controls the size of the conduction current of the driving thin film transistor so as to control the gray scale of the organic light emitting device; the driving thin film transistor is a low-temperature polysilicon thin film transistor; and the switching thin film transistor is a metal oxide semiconductor thin film transistor. The invention also discloses a fabrication method for the organic light emitting display panel. According to the organic light emitting display panel and the fabrication method therefor, the drain of the low-temperature polysilicon thin film transistor is in contact with the bottom electrode of the organic light emitting device, so that the current supplied for the organic light emitting device is stable, and the organic light emitting device can realize stable light emitting; and meanwhile, the electrical leakage of the metal oxide semiconductor thin film transistor is relatively low, so that a better circuit closing effect can be realized.

An OLED device comprising, in sequence, an anode, a light-emitting layer that comprises a phosphorescent light-emitting organometallic compound, a hole-blocking layer, and a cathode, and between the hole-blocking layer and the cathode, a further layer containing a mixture of a first compound that is a tetracene compound that has the lowest LUMO value of the compounds in the layer, in an amount greater than or equal to 10% and less than 90% and a second compound that is a low voltage electron transport material, exhibiting a higher LUMO value than the first compound in an amount less than or equal to 90% and more than 10%.

It is an object of the invention is to provide a light-emitting element in which failure of the light-emitting element due to separation can be controlled and stable luminescence can be obtained with high-efficiency and for a long stretch of time by controlling separation of layers constituting the light-emitting element. According to one aspect of a light-emitting element of the invention, the light-emitting element sandwiches a plurality of layers between a pair of electrodes, wherein at least one layer of the plurality of layers is a layer containing a substance selected from bismuth oxide, cobalt oxide, chromium oxide, copper oxide, nickel oxide, and titanium oxide, or at least one layer of layers different from a light-emitting layer among the plurality of layers is a mixed region of one substance selected from bismuth oxide, cobalt oxide, copper oxide, magnesium oxide, nickel oxide, zinc oxide, and titanium oxide and an organic compound.