30results about How to "Guaranteed luminous brightness" patented technology

The invention discloses a composite noctilucent fiber with a skin-core structure and a preparation method of the composite noctilucent fiber. The composite noctilucent fiber comprises the following components by mass fraction: 50-75wt% of skin layer and 25-50wt% of core layer, wherein the skin layer comprises luminescent material and carrier resin, and the core layer is made from polyolefin resin. The carrier resin of the skin layer is the same as the resin used by the core layer or is different from the resin used by the core layer. The luminescent material in the skin layer is made of light-storage type rare earth long afterglow luminescent powder; the luminescent powder is dispersed into the carrier resin by a mixing pelletizing method, and noctilucent master batch can be formed; noctilucent polyester pre-oriented yarn (POY) is prepared by melting and carrying out skin-core composite spinning on the noctilucent master batch and polyolefin resin; finally, noctilucent fully drawn yarn (FDY) is obtained by a drafting technology. The noctilucent fiber with the skin-core composite structure is high in strength, good in flexibility and high in fiber comprehensive application performance.

The invention provides a backlight module. The backlight module comprises a light guide plate, a circuit board and reflecting bodies, wherein the circuit board has a first light source and a second light source; the first light source can provide illumination to a first area of the light guide plate; the second light source can provide illumination to a second area of the light guide plate; when a light emitting angle of the first light source can cause an illumination effect of the first area to be worse than an illumination effect of the second area, the reflecting bodies are respectively arranged at the left and right sides of the light emitting surface of the first light source for reflecting one part of emitted light of the first light source, so that light of the first light source is collected in the first area to enhance the illumination effect of the first light source on the first area, and the light emitting brightness of the first area and the second area tends to be consistent. The backlight module is provided with the reflecting bodies to improve the uniformity of light emitting brightness in all areas.

The invention provides an organic electroluminescence element, an array substrate and a preparation method thereof and a display panel. The organic electroluminescence element a first electrode, a luminescent function layer and a second electrode, and the luminescent function layer is clamped between the first and second electrodes and is of a curved plate structure. Compared with an organic electroluminescence element with a luminescent function layer of a planar plate structure with the same large light emitting area, the organic electroluminescence element of the invention can broaden the light emitting area of the organic electroluminescence element, and ensures that the voltage loaded by the organic electroluminescence element of the curved plate structure is obviously lower than thatloaded by the organic electroluminescence of the planar plate structure under the condition that the light emitting brightness of the organic electroluminescence element is not changed; and further heat radiation of the organic electroluminescence element is reduced, an exciton quenching phenomenon caused by higher temperature is solved to certain extent, exciton ageing is slowed, and the servicelife of the organic electroluminescence element is prolonged.

The invention provides a novel LED lamp bulb provided with a gallium nitride LED chip. The novel LED lamp bulb comprises an upper end part (1), a bulb (2), an inner frame (3), a light emitting device (4), a supporting device (5), a plugging device (6) and a reflecting device (7), wherein a filling part (11) and pins (12) are arranged at the upper end part (1); a baffle plate (21), a power supply (22), a first supporting bar (23) and a first through hole (24) are arranged on the bulb (2); a first fixing ring (31) is arranged on the inner frame (3); the light emitting device (4) comprises a heat dissipation frame (41), circuit boards (42), LED lamp beads (43), heat conducting bars (44) and a connecting tube (45); the supporting device (5) comprises a cushion block (51), a second supporting bar (52) and a reflecting ring (53); the plugging device (6) comprises a plugging block (61) and a holding part (62); the reflecting device (7) comprises a reflecting plate (71) and diagonal bars (72). Effective heat dissipation of the LED lamp bulb is realized, the heat dissipation efficiency is high, and the heat dissipation effect is good.

The invention discloses a high weather resistance polysiloxane type luminous paint and a preparation method thereof. A high-weather-resistant polysiloxane type luminous paint, in parts by mass, comprising the following components: 100 parts of methyl vinyl silicone oil, 10-20 parts of methyl hydrogen-containing silicone oil, and 30-60 parts of methyl MQ resin , 5-10 parts of vinyl MQ resin, 5-15 parts of luminous powder, 0.01-0.06 part of inhibitor and 0.1-0.2 part of curing agent. The polysiloxane matrix selected for the luminous paint prepared by the invention has a moderate viscosity, which can effectively prevent the luminous powder from settling after the viscosity is too low, so as to achieve uniform distribution of the luminous powder in the coating layer, so that the luminous intensity of the luminous paint film after molding has consistency.

The invention relates to the technical field of composite materials, in particular to a long afterglow PE masterbatch, a preparation method thereof, a PE plastic part and a preparation method thereof. Long afterglow PE masterbatch, in parts by weight, its raw materials include 28-68.5 parts of PE resin, 0.3-1 part of dispersant, 0.5-5 parts of heat stabilizer and 30-70 parts of luminous powder, and The luminous powder in the long afterglow PE masterbatch forms a bond with the PE resin. The content of luminous powder in the long afterglow PE masterbatch of the present invention can reach 30-70%, and the luminous powder is evenly dispersed, and the long afterglow PE masterbatch has bright color, long luminescence time and high brightness.

The present invention provides super fine grain size high light efficiency long lad fluorescent powder. The chemical structural formula of the fluorescent powder is Srm-pMepAl2O(3+m+q):Eux, Dyy, Rz, wherein Me is at least one of Ba and Mg; R is at least one of La and Gd; m is more than 1 and less than or equal to 0.3; p is more than or equal to 0.006 and less than 0.3; q is equal to x plus y plus z; x is more than or equal to 0.005 and less than or equal to 0.05; and z is more than or equal to 0.0001 and less than or equal to 0.01. The preparation method comprises the following steps: 1) by taking the chemical structural formula of target products as a measuring base, oxides of Sr, Ba, Mg, Eu, Dy, La and Gd and nitrate or carbonate are picked up as raw materials; 2) the raw materials are added with reaction auxiliary agent; 3) the mixed materials are placed in a high-temperature reducing atmosphere furnace, and subjected to high-temperature synthesis under the protection of N2H2 mixed gas; 4)the sintered fluorescent powder blocks are crushed to obtain super fine grain size long lad fluorescent powder; and 5) the crushed fluorescent powder is subjected to after treatment to obtain the finished product. The fluorescent powder has the advantages of super fine grain size and centralized distribution and higher brightness and longer afterglow time, and can be better applied to fields such as luminescent fiber, printing, coating material.

The invention relates to an LED constant current drive circuit using a step-down constant current drive unit and an LED automotive lighting device including the circuit. The DC power supply of the LED constant current drive circuit provides two kinds of power supplies, a far light end power supply and a near light end power supply. The reverse polarity protection unit performs reverse polarity protection on the LED constant current drive circuit. The far light end power supply or the near light end power supply after voltage and constant current is provided to the LED lighting unit to drive the LED lighting unit. Switch between high beam end and low beam end. The LED constant current driving circuit and the LED automobile lighting device including the circuit of the present invention can realize the far and near light adjustment of the LED lighting module, and have the characteristics of simple structure and stable performance.

The invention provides an inorganic energy-storage ceramic luminous material and a preparation method thereof: the inorganic energy-storage ceramic luminous material is composed of 50-90 parts of glass powder and 10-50 The total weight of the glass powder and the luminescent material is 100 parts; the glass powder is selected from glass powder with a melting point of 400-800°C; the luminescent material is a rare earth luminescent material. The inorganic energy-storing ceramic luminous material of the present invention can realize self-luminescence after having good light-absorbing energy storage and heat-absorbing energy storage, and can absorb heat above 38° in the external environment for energy storage and self-luminescence.

The invention discloses a skin core structure tombarthite strontium aluminate long afterglow luminescent fiber and preparation method thereof, by mass, the luminescent fiber is prepared from 70-85% of core layer, and 15-30% of skin layer; the core layer is prepared from 10-30% of tombarthite strontium aluminate luminescent powder, 0.02-0.05% of phosphite ester, 0.02-0.2% of antioxidant agent, 0.5-1% of silane coupling agent, the balance polyamide resin; the skin layer adopts the transparent polymethyl methacrylate, or polycarbonate or polystyrene resin with added toughening agent. The prepared luminescent fiber because of the tombarthite strontium aluminate luminescent material being all located on the core layer, effectively prevents the tombarthite strontium aluminate luminescent material from falling, ensures the luminescent brightness of fibers, and raises the water resistance and abrasion resistance of the luminescent fibers, meanwhile the skin layer adopts resins with excellent transparent degree, making the prepared luminescent fibers smooth on surface, and further enhancing the luminescent effect of the luminescent fibers.

The invention discloses an LED constant-current driving circuit of multi-path self-adaptive loads. The LED constant-current driving circuit comprises a booster circuit providing positive electrode driving voltage for LED string lamps, a control circuit, a closed loop constant-current mirror driving circuit and a sampling circuit. The closed loop constant-current mirror driving circuit comprises an operational amplifier, power MOS transistors and current limiting resistors R1. The output end of the booster circuit is connected with the positive electrodes of each path of LED string lamps, the negative electrodes of each path of LED string lamps are connected with a drain electrode of one corresponding power MOS transistor, the gate electrode of each power MOS transistor is connected with the output end of the operational amplifier, the source electrode of each power MOS transistor is grounded through one current limiting resistor R1, and one end, connected with the corresponding power MOS transistor, of each current limiting resistor R1 is connected with the reverse input end of the operational amplifier. The output end of the closed loop constant-current mirror driving circuit is connected with the sampling circuit, the control circuit is respectively connected with the sampling circuit and the booster circuit, and the control circuits controls the output voltage of the booster circuit according to the voltage value acquired by the sampling circuit. The LED constant-current driving circuit is high in constant-current precision and capable of automatically regulating the driving voltage and driving multiple paths of LED string lamps at the same time.