60results about How to "Brightness unchanged" patented technology

The invention provides a method and system for improving an RGBW-image saturation. The method for improving the RGBW-image saturation includes step A; according to an independently adjustable range of screen partition dynamic backlight, dividing the screen into a plurality of screen subareas; step B: partitioning a to-be-displayed RGBW image according to the screen subareas; step C: determining saturation-to-be-adjusted partitions in the partitions of the to-be-displayed RGBW image; and step D: when the to-be-displayed RGBW image is displayed, according to a preset proportion, reducing the backlight luminance of the saturation-to-be-adjusted partitions. The method and system for improving the RGBW-image saturation are capable of realizing refined adjustment of the saturation of the RGBW image.

The invention relates to a submersed marine fishing lamp with a high-power blue-green LED as a luminous source. The existing auxiliary equipment used in the luring and fishing of fishes mainly adopts a metal halide lamp which has wide light source wavelength range, after filtration in the sea, the remaining blue-ray component is little and the other colors are all absorbed by the seawater, thus causing great waste of energy resource. The purpose of the invention is to provide the submersed high-power blue-green LED marine fishing lamp. The structure of the invention consists of a high-power blue-green LED arranged on a lamp body; in the lamp body, an upper shell is fixed on the upper end of a main shell which is sequentially fixed with a circulating water insulated tube, a lower shell, a glass cover and a protecting cage from inside to outside; both the external surfaces of the lower shell and a lower baffle are fixed with a high-power blue light LED, the cable plywood used in the upper shell is fixed and connected with a power board. The application of the lamp is that the fishes in the sea are gathered by the blue-green light with the wavelength from 465nm to 490nm given out by a light source module, thus achieving the purposes of saving energy and improving the efficiency of fishing.

The invention discloses an organic light-emitting device with long service life. The organic light-emitting device comprises a first electrode, a second electrode and an organic light-emitting element containing a phosphorescent light emitting layer or a delayed fluorescence light emitting layer between the first electrode and the second electrode. The organic light-emitting device further comprises a pulse alternating-current drive circuit driven by forward pulse voltage V1 or forward pulse current I1 so that the organic light-emitting element can emit light. The pulse alternating-current drive circuit applies inverse pulse transient pulse voltage V2 reverse to the forward pulse voltage V1 or the forward pulse current I1 after applying the forward pulse voltage V1 or the forward pulse current I1. The application control time of the inverse pulse transient pulse voltage V2 in each cycle is less than or equal to 10 micro seconds. According to the organic light-emitting device with long service life, the service life of a screen of the organic light-emitting device is effectively prolonged on the condition that stroboflash is reduced.

The invention discloses an operating lamp with a distance measurement feedback illuminance automatic regulating function. The operating lamp with the distance measurement feedback illuminance automatic regulating function comprises a lamp head and a handle arranged in the middle of the inside of the lamp head. A protective shell is arranged outside the handle. An illumincance feedback component is further arranged inside the lamp head. A distance measurement assembly and a pressure sensing assembly are arranged inside the handle. The operating lamp with the distance measurement feedback illuminance automatic regulating function is simple in structure, convenient to operate, capable of conducting real time distance measurement on working distance in the moving process of the operating lamp and automatically correcting luminance of the operating lamp, enables the illuminance of the center of an operating field to remain unchanged in surgery, avoids disturbing operation of a doctor in surgery in which the lamp head of the operating lamp is static, reduces risk of harming a patient, and has great significance in the medical treatment and public health industry.

The invention discloses an LED (light-emitting diode) operating shadowless lamp of multicolour multiple-lens light source matrixes, relating to the technical field of illuminating lamps. The LED (light-emitting diode) shadowless lamp aims to solve the technical problems that a traditional operating shadowless lamp has fixed and nonadjustable illuminating depth value and lower color temperature value, and comprises a right lamp cap with adjustable illuminating depth and a left lamp cap with adjustable color temperature. The right lamp cap comprises a pedestal; more than two lamp source plates are arranged on the lateral side of the pedestal; the lamp source plates are connected with a pedestal shaft through plate connecting bars; the right lamp cap comprises at least one illuminating unit;each illuminating unit comprises a lamp panel; the LED operating shadowless lamp comprises a warm white LED lamp, a blue LED lamp, a cyan LED lamp, a natural white LED lamp, and a cold white LED lamp; the included angles between the lamp source plates are synchronously adjusted by a drive motor; the beam focus of each lamp source plate moves downwards, and the warm white LED lamp, the blue LED lamp, the cyan LED lamp, the natural white LED lamp and the cold white LED lamp are combined to realize adjustable color temperature of the shadowless lamp; moreover, the color temperature can be adjusted to 5,000K at most; therefore, the LED (light-emitting diode) operating shadowless lamps can adapt to various surgery demands.

The embodiment of the invention discloses a screen display control method and a mobile terminal, wherein the screen display control method comprises the steps of starting and displaying a control slide block at the first side edge part of the current display screen; if the condition that the control side block slides to the opposite second side edge from the first side edge is detected, lowering the brightness of the first region of the current display screen or the brightness of the second region beyond the first region, wherein the first region is a region in which the control side block passes through when sliding from the first side edge to the second slide edge. The technical scheme provided by the embodiment of the invention has the advantages that the brightness of the local region of the display screen can be regulated according to requirements; the energy consumption is reduced; the energy saving is better realized.

The invention discloses an LED color temperature adjusting device and method based on single-channel PWM (pulse width modulation). The LED color temperature adjusting device comprises a microprocessor, a warm color temperature switch control circuit, a cold color temperature switch control circuit, a warm color temperature LED lamp and a cold color temperature LED lamp. The method includes: respectively inputting preset-frequency PWM signals to the warm color temperature switch control circuit and the cold color temperature switch control circuit; according to the input PWM signals, controlling brightness of the warm color temperature LED lamp and the cold color temperature LED lamp which are connected with the warm color temperature switch control circuit and the cold color temperature switch control circuit respectively by the same. The LED color temperature adjusting device is simple in structure, the method is simpler and more reliable in realization, resource using efficiency can be improved effectively, and changing amplitude of brightness of the LED lamps can be uniform, so that brightness can be maintained unchanged when color temperature is adjusted; adjusted color temperature can change continuously, so that color temperature adjusting range is effectively expanded, and actual using effect of LED color temperature changing is improved. The LED color temperature adjusting device and method can be widely applied in the field of LEDs.

The invention provides a gamma correction method and device of a display panel, and the method and device receive an image signal of a front end, detect the refresh frequency of the image signal in real time, and then call different gamma correction curves according to whether the refresh frequency of the image signal exceeds a preset refresh frequency or not, calls the gamma correction curve with higher brightness at the low refresh frequency, so that the gamma correction curve with higher brightness can be used for compensating certain brightness when the electric leakage is higher and the display brightness is reduced at the low refresh frequency of the display panel. Because the number of the target gray scales of each gamma correction curve is small, the number of data voltages corresponding to each group of target gray scales is small, so that when the display panel is switched from a high refresh frequency to a low refresh frequency, the display brightness of the display panel can be quickly adjusted, the display brightness of the display panel can be kept unchanged, the flicker phenomenon is avoided, and the storage space of the register is saved.

The invention relates to a liquid crystal display television display technology and solves the problem that brightness variation is caused by existing liquid crystal display television color temperature adjustment. The technical scheme is summarized as follows: after a target color temperature value and a target brightness value are set, an output image is analyzed, an image backlight color temperature is obtained, then RGB three-primary-color luminous flux corresponding to the color temperature is matched by utilizing a color mixture database based on an RGB three-primary-color mixture algorithm, then obtaining drive currents for RGB three primary colors according to a changing curve between the luminous flux and the drive currents, respectively driving a red light chip, a green light chip and a blue light chip of the LED backlight to obtain the target color temperature, and adjusting the drive currents for the RGB three primary colors for achieving the target brightness value under the condition that the ratio of the RGB three-primary-color luminous flux is maintained to be constant. The method provided by the invention has the beneficial effects that brightness does not change after the color temperature is adjusted, and color temperature consistency of different televisions is good by virtue of white balance adjustment. The method provided by the invention is especially applicable to a liquid crystal display television based on an RGB three-primary-color LED backlight.

The invention discloses a high-efficiency LED lighting lamp linear driving circuit. The circuit comprises four parts, including an input protection circuit, a bridge type rectifier, a constant currentcontrol circuit and an overvoltage shutdown circuit, wherein the constant current control circuit is similar to a conventional linear driving circuit of an LED lighting fixture, the overvoltage shutdown circuit is connected in series between a negative terminal of the constant current control circuit and a negative terminal of the rectifier bridge and is composed of an input voltage sampling circuit, a reference power source, a comparator CP and an N-channel power switch tube, the circuit is generally applicable to multiple types of small and medium power LED light source lighting fixtures, and the circuit has advantages of high luminous efficiency, small temperature rise of a constant current control tube, small current surge current, wide input voltage range and the like.

The invention discloses a LED (light-emitting diode) driving circuit which comprises a light emitting module and an AC (alternate current) first input end and an AC second input end which are respectively arranged at both ends of the light emitting module, wherein the light emitting module comprises a first LED group and a second LED group which are connected in parallel; and both the first LED group and the second LED group comprise a plurality of LEDs which are correspondingly connected in series and have ethe same conduction directions. According to the invention, AC square signals with equal sizes and opposite phases are input into the light emitting module by the AC first input end and the AC second input end, so that the LEDs of a LED lamp bar are alternately lightened, the LED backlight is uniform, the LED brightness is strengthened, the display effect is better, the driving voltage is also reduced, the electric energy is saved and the use safety is ensured. Moreover, the LED driving circuit has the advantages of simple and reasonable circuit structure and easiness for implementing. The invention also further discloses a LED driving method and the LED lamp bar.

The invention provides a desk lamp with automatically regulated brightness. The desk lamp with automatically regulated brightness comprises a 220V AC power supply, a full bridge rectifier circuit, a 9V voltage regulator circuit, a light-sensing circuit, an optical signal amplifying circuit, a relaxation oscillation circuit and a double-direction controllable silicon control circuit, and is characterized in that the type selected by a unijunction transistor VT2 in the relaxation oscillation circuit is BT33. The desk lamp with automatically regulated brightness is characterized in that a photoconductive resistor is arranged on a suitable location of the desk lamp, the illuminance surrounding the desk lamp can be automatically regulated to a suitable value, thus the trouble of manual dimming can be reduced and the vision of the students can be protected; moreover, the desk lamp with automatically regulated brightness also has the function of stabilizing the lamp brightness, and the brightness of the desk lamp can be always remained unchanged when a 220V AC voltage fluctuates. The desk lamp has the advantages of simple circuit because normal components are used, and manufacture cost of only more than ten yuan, and is suitable for batch development.

The invention provides a liquid crystal display panel, a display device and a working method, and belongs to the technical field of display. Each pixel region of the liquid crystal display panel comprises a first sub-pixel region and a second sub-pixel region; and each pixel region comprises a light valve, a double refraction structure, first liquid crystal unit, a first filtering unit, a second liquid crystal unit and a second filtering unit, wherein the light valve can be switched between a first state and a second state; in the first state, the light valve only allows incident first polarized light in a first polarization direction to pass through; in the second state, the light valve only allows incident second polarized light in a second polarization direction to pass through; the double refraction structure does not change an emergent path of the vertically incident first polarized light and can enable an emergent path of the vertically incident second polarized light to be shifted; the first liquid crystal unit directly faces a light outlet of the light valve; and the second liquid crystal unit is positioned on the emergent path of the second polarized light. According to the invention, transmittance and contrast of the display device can be improved in a case of not increasing power consumption.

The invention provides a self-adaptive image enhancement method and device based on image gray levels, and relates to the technical field of image processing, and the technical scheme comprises the steps: obtaining the occurrence frequency of each gray level of a to-be-processed image, and storing the gray levels, of which the gray levels exceed a preset gray level threshold value, in a preset array; reading the gray values according to the serial numbers of the preset array in sequence, and redefining according to the corresponding relationship between the gray values and the serial numbers to obtain new gray values; and performing adaptive enhancement processing on the to-be-processed image according to the new gray value. According to the scheme, the image can be enhanced in a self-adaptive mode, the image brightness is basically unchanged, details of the excessively dark part of the image can be richer, the excessively bright part of the image can be restrained, and therefore the fidelity effect is achieved.

The invention provides a polymer fluorescent nanometer particle. The polymer fluorescent nanometer particle is applied to liquid crystal display devices, and comprises a polymer nanometer particle, and rhodamine dye and hydrophilic-lipophilic balancing matter loaded on the polymer nanometer particle, wherein the polymer nanometer particle, the rhodamine dye and the hydrophilic-lipophilic balancingmatter are combined into a whole through electrostatic attraction; the hydrophilic-lipophilic balancing matter comprises at least one in perchlorate, sodium tetraphenylborate, sodium tetrakis (4-fluorophenyl) borate dihydrate and trityl tetrakis (pentafluorophenyl) borate. The polymer fluorescent nanometer particle can absorb yellow-orange light and emit red light, can be applied to liquid crystal display devices, so as to reduce interference of yellow-orange parasitic light and enhance the color gamut, and meanwhile emit red light to guarantee invariability of lightness; meanwhile the rhodamine dye is loaded on the polymer fluorescent nanometer particle, can avoid agglomeration of the rhodamine dye, improves the absorption efficiency and fluorescence efficiency, and the polymer fluorescent nanometer particle has a wide application prospect to the liquid crystal display devices.

The invention discloses a method for increasing the gray level of an LED lamp, which comprises the following steps: S1, the refresh frequency of the PWM is set, and the PWM frequency is used as the frequency of the original PWM; S2, calculating the number of cycles N required to reduce the PWM frequency according to the frequency requiring the PWM and the original PWM frequency, and taking the total period of N cycles as the new PWM; S3, allocating the duty cycle or gray scale of each cycle in the new PWM according to the duty cycle or gray scale of the cycle in which the PWM is required, andoutputting the duty cycle or gray scale. In accordance with that prior art, The invention discloses a method for increasing the gray level of an LED lamp. Before each PWM is output, the change amountof the gray level is changed according to the cycle required by the PWM frequency reduction so as to form a new PWM cycle, thereby realizing the purpose of reducing the refresh frequency of the PWM and simultaneously increasing the gray level of the PWM. The invention solves the problem that it is difficult to increase the gray level of the LED lamp at present, and provides a method for increasingthe gray level of the LED lamp.

The invention provides a LED panel driving circuit with current compensating function. Because the LEDs of the LED panel are arranged in a matrix form and the LED panel and switches all have line resistances, if plural LEDs on the same line are lighted at the same time, the current source produces multiple voltage drop as flowing through the same line resistance, thus reducing the voltage drop on the LEDs and current source to cause the reduction of LED current and brightness, and thus the LED brightness is not stable. The invention duplicates a set of LED current source circuit, individually compensating the reduction of LED current, thus keeping the LED brightness constant.

The invention discloses a street lamp control method for realizing identical illuminance. An identical illuminance value is firstly set to be a given value; then, a photometer is used for measuring real-time photoelectric signals; the two values are compared to obtain deviation; the deviation signal is transmitted to a fuzzy controller; a value after precision is obtained through fuzzy calculation; the value is then transmitted to a lighting circuit for realizing the change of the illumination intensity; and through feedback comparison, the illuminance is adjusted to be constant in a required range. The illumination intensity of the street lamp is determined according to different illumination intensities, identical illuminance in an area using the lighting lamp is realized, and an importance role is played in energy conservation and emission reduction.

The invention relates to a display control method and device, a driving module and electronic equipment. The display control method comprises the following steps: acquiring a delay instruction from a processor; the delay instruction comprises delay duration required for displaying the frame of image; determining a plurality of control pulses required for displaying the frame of image according to the delay duration, wherein the duty ratios of the plurality of control pulses are the same; and when a synchronizing signal is received, each control pulse in the plurality of control pulses is generated in sequence, and the control pulses are used for controlling the AMOLED display screen to carry out dimming display. According to the embodiment of the invention, the duty ratio of each control pulse in one refresh cycle can be the same, the display of the AMOLED display screen can be kept unchanged, the situation of display picture jitter is avoided, and the watching experience is improved.

The invention relates to the technical field of LED driving, and specifically discloses a low-cost constant-current charging LED driving circuit. The driving circuit has a power supply input end connected with a power supply, and also comprises a first resistor, a second resistor, a first diode, a second diode, a lighting-on induction switch, a triode and a light emitting diode. According to the low-cost constant-current charging LED driving circuit provided by the invention, through establishment of the triode, the diodes and other components, LED luminance stability is realized, and it is ensured that the LED luminance is still unchanged in an LED power supply voltage fluctuation condition; through a received external low-level feedback lighting-on signal, the LED is driven directly, sothat occupation of an MCU port is avoided, and the system MCU port resource is saved; and by adoption of establishment of the resistors, the diodes, the triode and other low-cost electronic components, and compared with the existing circuit which adopts a scheme of adopting an LDO voltage-stabilizing chip to realize LED constant current driving, the cost is greatly lowered and higher cost performance is achieved in the invention.

The invention discloses a linear switching constant-current LED drive circuit for control over peak current, and relates to the field of power source drive circuits. Compared with an existing linear constant-current LED drive circuit, and according to the linear switching constant-current LED drive circuit for control over the peak current, an integrating capacitor is connected to a loop of a drive chip in parallel, and average current passing through an LED lamp bead can be kept to be constant through the integrating constant-current mode; in addition, due to the fact that a loop formed by an operational amplifier, a switching selector and a high-voltage power MOS is added to the loop of the drive chip to limit the peak current passing through the LED bead, useless power consumption of a system can be reduced, working efficiency of the system can be improved, heat produced in the working process of the drive chip is reduced, the required rated current of the LED bead can be effectively reduced, the luminous efficiency of the LED bead is improved, the luminous decay of the LED bead slows down, the service life of the LED bead is prolonged, and cost of the system is reduced.

The invention relates to the technical field of intelligent electronic devices and provides an energy-saving lamp module. The energy-saving lamp module comprises a power supply chip, a single-chip microcomputer, at least one CMOS switch and at least one LED lamp, wherein the power supply output end of the power supply chip is connected with one end of the CMOS switch, and the other end of the CMOS switch is connected with the LED lamp; the signal control end of the single-chip microcomputer is respectively connected with the CMOS switch and the power supply chip; the single-chip microcomputer is used for sending out a first control signal to the power supply chip at the first moment to control the power supply chip to output constant voltage and first constant current; meanwhile, the single-chip microcomputer sends out a PWM signal to the CMOS switch to control the CMOS switch to perform PWM dimming on the LED lamp; the single-chip microcomputer is also used for sending out a second control signal to the power supply chip at the second moment to control the power supply chip to output constant voltage and second constant current; the second constant current is smaller than the first constant current.

The invention discloses a display panel and a display device, the display panel comprises a plurality of first color sub-pixels, and the first color sub-pixels comprise first color sub-pixels A and first color sub-pixels B; the display panel at least comprises a low-gray-scale picture during display, and when the display panel displays at least part of the low-gray-scale picture, the low-gray-scale picture comprises a first stage and a second stage, the first color sub-pixels A of the first stage have initial brightness, and the first color sub-pixels B of the first stage have initial brightness; in the second stage, the first color sub-pixels A have first brightness, and the first color sub-pixels B have second brightness; the first brightness is less than the second brightness, the firstbrightness is less than the initial brightness of the first color sub-pixel A, and the second brightness is greater than the initial brightness of the first color sub-pixel B; the gray value range ofthe low gray scale is greater than or equal to 0 and less than or equal to X, and X is a positive integer. According to the invention, the phenomenon of uneven display of the display panel during low-gray-scale display is effectively improved.

The invention discloses a cascading application system capable of omitting peripheral resistors and capacitors and reducing interference and an implementation method thereof. The cascading applicationsystem comprises a single-path cascading application system and a multi-path cascading application system, and the system comprises a plurality of groups of bound and packaged LED lamps, a pluralityof cascading chips and a controller. According to the cascade application system and the implementation method thereof, a universal original application system is adopted, the use cost is not increased, a resistor and a capacitor are omitted, system interference is reduced, and the cascade LED display application system is safely, effectively, correctly and stably used.

The invention discloses a backlight module, a display device and a backlight color temperature adjusting method. The backlight module comprises a diffusion plate, an optical film, a reflector plate and a backlight source which is arranged on the reflector plate and is used for adjusting a color temperature value and a brightness value; and the backlight source and the reflector plate are arranged on the light inlet side of the diffusion plate, and the optical film is arranged on the light outlet side of the diffusion plate so as to provide incident light for the display screen. According to the invention, the backlight source used for adjusting the color temperature value and the brightness value is arranged, the current value proportion of the LEDs in the backlight source can be adjusted when the color temperature value of the display device is adjusted, and therefore the brightness of the display device is not changed.

The invention relates to a mining intrinsically safe car backing-up alarming device. More than four middle sound transmission holes, front mounting grooves and rear mounting grooves are formed on the circumference of the inner chamber of a casing; a cable connecting plug is hermetically mounted on a mounting base at the lower part of the casing; a horn is mounted on a rear window of the casing inan inverted manner; a waterproof diaphragm is hermetically mounted on the rear end surface of the casing through a pressure plate; a front cover is mounted at the front part of the casing; a transparent lid is hermetically mounted at a window of the front cover and forms a closed watertight seal cavity; a middle cover plate on which a circuit board, an alarm lamp and a camera are mounted is mounted on the front cover or / and the inner chamber wall of the casing; more than four front sound transmission holes at the front part of an annular groove on the front cover and the middle sound transmission holes on the casing are arranged in a staggered manner; drain holes are formed at the bottom of the annular groove; a rear cover with a spherical surface is mounted at the rear part of the casingand opposite to the waterproof diaphragm; and a cavity between the rear cover and the casing is communicated with the middle sound transmission holes and the front sound transmission holes to form sound channels. The mining intrinsically safe car backing-up alarming device has the advantages of reasonable structure, convenience and reliability in use and flushing resistance, and can dynamically capture video of the rear part of a vehicle.

The present application relates to a picture color adjustment method, device, computer equipment and storage medium. The method includes: acquiring the RGB original color component value and original brightness value of the picture to be adjusted; if an adjustment instruction for any color component of the picture to be adjusted is received, then acquiring the color adjustment variation of the color component, Adjust the original color component value of this color based on the amount of color adjustment change, and perform the opposite adjustment operation on the original color component values ​​of the other two color components; if an adjustment instruction for the screen brightness of the screen to be adjusted is received, obtain The brightness adjustment variation used to adjust the original brightness value to the target brightness value, and adjust the original brightness value of the picture to be adjusted based on the brightness adjustment variation amount. By adopting the method, the accurate adjustment of the color of the picture can be realized, and the visual effect of the picture can be guaranteed.

The invention provides an LED (light-emitting diode) constant current driving circuit, which comprises a constant current module, a current follower module and a load LED indicator light, wherein the constant current module is connected with a power supply input end; current input by the power supply input end is constant at a preset value; and the current follower module is connected between the constant current module and the LED indicator light, so as to further stabilize the current output by the constant current module. By adopting the circuit provided by the invention, the current flowing through the LED indicator light can be constant, and the brightness of the LED indicator light is kept invariant, so that the LED constant current driving circuit is applicable to indicator lights of various electronic devices, the simplicity is realized, and the cost is low.