156results about How to "Prevent postback" patented technology

The present invention relates to an organic light emission diode device (OLED) structure, especially to a high-efficiency organic light emission diode device of a B-containing compound. The organic light emission diode device structure comprises an anode, a cavity injection/transmission layer, a luminescent layer, an electron injection/transmission layer and a cathode, wherein the luminescent layer comprises main body materials and doped materials; the main body materials are formed by signal materials and are also formed by mixing materials with different structures; and the doped materials are organic compounds containing boron, the energy level difference of the singlet state and the triplet state is not larger than 0.2ev, and the energy level of the singlet state and the energy level of the triplet state of the of the main body materials are both higher than that of the doped materials to prevent energy from passback and avoid reduction of the device luminescence efficiency. The present invention further provides a preparation method of the organic light emission diode device. The preparation method is utilized to obtain the organic light emission diode device which is high in efficiency, long in life and high in purity.

The present invention relates to an electroluminescence device based on a boron-containing organic compound, wherein a main body material comprises a first organic compound and a second organic compound, the difference between a singlet state energy level and a triplet state energy level of the first organic compound is not greater than 0.2 eV, the singlet energy level of the second organic compound is greater than the singlet energy level of the first organic compound by more than 0.1 eV, and the triplet energy level of the second organic compound is greater than the triplet energy level of the first organic compound by more than 0.1 eV; the first organic compound and the second organic compound have the different carrier transport characteristics, wherein an object material is the boron-containing organic compound, the singlet energy level of the object material is lower than that of the first organic compound, and the triplet energy level of the object material is lower than that ofthe first organic compound. An organic light-emitting device prepared by the method has the characteristics of high efficiency and long service life.

The invention discloses an organic electroluminescent device. A light-emitting layer comprises a host material and a guest material. The host material is an exciplex formed by an electron donor material and an electron acceptor material, and the guest material is a thermally activated delayed fluorescent material. The singlet-state energy level of the host material is lower than the singlet-stateenergy level of the guest material. Since the singlet-state energy level of the exciplex as the host material in the light-emitting layer is lower than the singlet-state energy level of the thermallyactivated delayed fluorescent material, the generation of high-energy excitons is prevented, and molecular bond breakage due to high excitation energy is effectively suppressed. The singlet-state energy level of the exciplex is low, which is beneficial to reduce the excitation energy of the excitons in the device, and suppress the triplet state-triplet state annihilation, the triplet state-polaronquenching and the singlet state-triplet annihilation phenomena in the device, thereby reducing the efficiency roll-off of the device and prolonging the service life of the device.

The invention discloses a textile fabric conveying device, and belongs to the field of textile processing mechanical equipment. According to the textile fabric conveying device, a fabric unwinding mechanism and a fabric conveying mechanism are arranged on the two sides of a fabric conveying support correspondingly, a lifting fabric guide roller is horizontally arranged on the fabric conveying support between the fabric unwinding mechanism and the fabric conveying mechanism, the lifting fabric guide roller is horizontally and rotationally connected to a reciprocating lifting guide block, a fabric unwinding roller is horizontally, coaxially and fixedly arranged in the middle of a fabric unwinding rotary plate, a pressing plate damping swing rod is arranged on a fabric conveying support on the lower side of the fabric unwinding rotary plate, the two sides of a fabric non-return support are horizontally and rotationally connected with a front material guiding rotary roller and a rear material guiding rotary roller correspondingly, and a lifting material pressing rotary roller is arranged on the lower side of a fabric conveying rotary roller. The textile fabric conveying device is reasonable in structural design, textile fabrics can be efficiently, smoothly, sequentially and intermittently conveyed, stable, accurate and continuous sectional conveying of textile fabrics is achieved,the automation degree of textile fabric conveying and processing is improved, and the requirements of production and use are met.

The invention discloses a digitized accurate ink supply method of a printing machine. Metering printing ink conveying units replace ink keys on a traditional printing machine; each metering printing ink conveying unit directly conveys printing ink to corresponding ink areas; and the volume or mass serves as metering basis, quantitative supply of the printing ink for each ink area is achieved. In the working state, the ink supply flow speed of each metering printing ink conveying unit is obtained through calculation according to the consumption amount of the printing ink of corresponding color plates and the corresponding ink areas in each printed sheet and the operation speed of the printing machine, and the ink supply flow speed of each metering printing ink conveying unit is calculated and adjusted in real time along with change of the operation speed of the printing machine. By means of the digitized accurate ink supply method of the printing machine, real-time accurate adjustment can be achieved, the automation degree and digitization degree are high, the adjustable range is wide, one-way printing ink conveying is achieved, and printing ink return is avoided.

The invention provides an organic semiconductor material with a chemical formula shown below. The organic semiconductor material provided by the invention has bipolar carrier transportation capability, such that hole and electron transportations in a luminescent layer are balanced. The organic semiconductor material also has relatively high triplet state energy level and excellent thermal stability, such that energy is effectively prevented from being transported back to the main material during a luminescent process, and luminescent efficiency is greatly improved. The invention also provides a preparation method of the organic semiconductor material, and an electroluminescent device comprising the organic semiconductor material.

The invention relates to an organic electroluminescent device based on an exciplex and excimer system. A light emitting layer host material includes first, second and third organic compounds. A mixture or lamination interface formed by the first organic matter and the second organic matter generates an exciplex under optical or electric excitation. The third organic compound is doped in a mixtureformed by the first organic compound and the second organic compound or a layer of a laminated interface, and the third organic compound forms an excimer. The singlet energy level of the exciplex is higher than that of the third organic compound, and the triplet energy level of the exciplex is higher than that of the third organic compound. The singlet energy level of the excimer is higher than that of the object material, and the triplet energy level of the excimer is higher than that of the object material. The first organic compound and the second organic compound have different carrier transport characteristics, and the object doping material is a fluorescent compound. The device has the characteristics of high efficiency and long service life.

The invention provides an LED (light emitting diode) lamp with a pipeline. The LED lamp comprises a base plate, a controller, a base, the pipeline, a lamp shade and a heat radiator, wherein LED lamp beads are encapsulated in the base plate, the pipeline is connected with the base, the lamp shade is connected with the base, the heat radiator is connected with the outer wall of the base, one end of the pipeline passes through a through hole and is connected with the base plate, a support frame is arranged in the base, and the other end of the pipeline is connected with the support frame. One side, connected with the pipeline, on the support frame is provided with a fan, one end, connected with the base plate, of the pipeline is provided with a first air outlet and second air outlets, and the base plate is connected between the first air outlet and the second air outlets. The lamp shade is provided with a plurality of first heat radiation holes, and the side wall of the base is provided with a plurality of second heat radiation holes. Net pieces are arranged on the inner wall of the pipeline, and the net pieces are connected with semiconductor refrigeration sheets. The LED lamp with the pipeline has the advantages that wind generated through the rotation of the fan arranged on the base can be simultaneously blown to the LED lamp beads and the back side and the front side of the base plate through the first outlet and the second air outlets; meanwhile, through the net pieces connected with the semiconductor refrigeration sheets in the pipeline, the temperature of the wind blown from the fan can be reduced, and the heat radiation effect is more obvious.

The invention provides a biomass particle combustor. The biomass particle combustor comprises feeding equipment, combustion equipment and blast air supply equipment, wherein the feeding equipment comprises a material pipe; the combustion equipment comprises an inner fire outlet pipe and an outlet fire guide pipe; the blast air supply equipment comprises a blast pipe, an outer air box and an inner air box; the inner air box is arranged inside the outer air box, and the blast pipe is communicated with the outer air box and the inner air box; the material pipe penetrates through the inner air box to be communicated with the inner fire outlet pipe; the inner fire outlet pipe is arranged on the outer wall of the inner air box and penetrates through the outer air box, and vent holes are formed in the inner fire outlet pipe; the outlet fire guide pipe is fixed to the outside of the outer air box to sleeve the part, outside the outer air box, of the inner fire outlet pipe, and a gap is reserved between the outlet fire guide pipe and the inner fire outlet pipe and communicated with the outer air box. The biomass particle combustor is reasonable in structural design, low in cost and high in combustion efficiency.

The invention discloses an electron transport material and a preparation method and an application thereof. A compound used for preparing the material comprises phosphorus oxyl in a high triplet state, and pyridine and triazine units with electron transport capabilities, wherein in the high triplet state, energy can be effectively prevented from transmitted to a main body material in a light emitting process. The material has high electron transport capability, can be used for preventing energy retransmission in the light emitting process, and is applied to electron transport layers of blue light phosphorescent light organic electroluminescent devices; and the efficiency of a phosphorescence device is increased remarkably.

The invention discloses a carbazolyl-based organic electroluminescence compound which has the structural general formula shown by formula (I), wherein R is H, CH3 or CH2CH3. The organic electroluminescence compound disclosed by the invention is used as phosphorescent host material in an organic electrophosphorescent device, and has good electronic transmission characteristic and thermal stability; and meanwhile, the host material has relatively high triplet state energy level and can effectively prevent back transfer of triplet state energy so as to improve the luminous efficiency and prolong the service life of the organic electrophosphorescent device.

The invention provides an organic semiconductor material. The chemical formula of the organic semiconductor material is shown in the specification. The organic semiconductor material has a high triplet-state energy level, and energy is effectively prevented from being delivered back to a main body material in a light-emitting process, so that the light-emitting efficiency is increased greatly, and high thermal stability is achieved. The invention further provides a preparation method of the organic semiconductor material, and an electroluminescent device comprising the organic semiconductor material.

Belonging to the field of organic semiconductor materials, the invention discloses a bipolar blue light phosphorescent host material, a preparation method and an organic electroluminescent device thereof. The host material has a structural formula shown as the specification. The bipolar blue light phosphorescent host material provided by the invention has bipolar carrier transport capacity, also has hole transport properties and electron transport properties at the same time, and enables balance transport of holes and electrons in a luminescent layer. With a high triplet state energy level, the host material can effectively prevent back transmission of energy to the host material in a luminescence process, thus greatly improving the luminescence efficiency.

The invention belongs to the field of organic semiconductor materials and discloses a carbazolyl blue phosphorescent host material as well as a preparation method and application thereof. A structural formula of the material is shown in the specification. The carbazolyl blue phosphorescent host material provided by the invention has the advantages that the host material has hole transport property and electron transport property at the same time, so that holes and electrons in a luminescent layer are balanced in transport; the host material also has a higher triplet energy level, so that energy is effectively prevented from being transferred back to the host material in the luminescence process, thus greatly improving the luminescence efficiency.