36results about How to "Improve dimming efficiency" patented technology

The invention provides a method and a system for determining maximum brightness of RGB LED light source matching target chromaticity. The method comprises the following steps: acquiring target chromaticity data; obtaining absolute tristimulus values of R, G and B color LED light sources at their maximum control signal values; establishing a mixed light equation group according to the relationshipbetween the target chromaticity and the absolute tristimulus values, and solving the mixed light equation group according to the obtained target chromaticity data and the absolute tristimulus values so as to obtain normalized brightness matching coefficients of R, G and B color LEDs; and calculating the maximum brightness matching coefficient according to the normalized brightness matching coefficient and obtaining the maximum achievable brightness value when the RGB LED light source matches the target chromaticity according to the maximum brightness matching coefficient and the Y stimulationvalue in the obtained absolute tristimulus values. The problem that the RGB LED light source cannot mix light due to exceeding the maximum brightness during dimming can be effectively avoided by determining the maximum brightness which can be achieved by the RGB LED light source when matching the target chromaticity.

The present invention provides a dimming control method, device and display device for light-emitting components. The method includes: inputting digital signal parameters to the light-emitting components corresponding to any pixel in the display device according to the preset group number, so as to control the light-emitting components. Scanning in several scanning stages of preset groups; where the preset number of groups is the number of groups of set gray values ​​obtained by grouping the gray levels of the display device, and the set gray values ​​of each group correspond to a control light-emitting element The device realizes the first analog signal parameters corresponding to the set grayscale value in the corresponding scanning stage; according to the target grayscale value, when scanning the light-emitting components in each scanning stage, input the first analog signal corresponding to the scanning stage to the light-emitting components The signal parameter or the second analog signal parameter, so that the superimposed gray value of the light-emitting component after a preset set of scanning stages is equal to the target gray value of any pixel. The embodiments of the present invention can not only avoid the problem of flicker easily occurring at low gray levels, but also improve the dimming precision.

The invention provides a light source device, comprising a light source and a light modulation device. The light source generates initial light. The light modulation device comprises a light modulation reflecting surface for receiving the initial light and reflecting the initial light to change the initial light into modulated light. In the actual situation, the initial light reaches the light modulation reflecting surface in an incident region, and multiple light modulation reflecting regions are formed on the light modulation reflecting surface and provide adjustments of different levels directed at light modulation characteristics, respectively. The light modulation reflecting regions selectively enter the incident region with respect to an alternating axial direction and reflect the initial light to change the initial light into the modulated light. The alternating axial direction is parallel to the light modulation reflecting surface.

The invention relates to a laser mirror assembly. The laser mirror assembly is convenient in adjustment and detection and can realize online detection and debugging. The laser mirror assembly comprises a triangle-shaped and hollow seat body, two adjacent square faces of the seat body are respectively provided with large light holes, the back of the seat body is provided with a mounting hole, the laser mirror assembly also comprises an adjusting assembly which is coaxially and adjustably connected with the mounting hole and a mounting assembly which is connected with the adjusting assembly in a dismountable way; and a lens is fixedly connected in the mounting assembly. In the invention, the adjusting assembly and the mounting assembly are arranged, and the two assemblies are in splittable connecting structures, thus mounting can be directly carried out, the assembly can be polished and polishing test can be carried out only by separating the mounting assembly from the adjusting assembly when the lens is required to be dismounted to be polished during the debugging, replacing and maintenance processes. In the polishing test process, the adjusting assembly is adjusted. After positioning is finished, the mounting assembly provided with a lens is connected, thus the position and angle of a reflected beam mirror surface are not changed after a new lens is mounted and a light path can be directly put into use without adjusting after the new lens is replaced.

The present invention relates to molybdenum oxide nano powder and a preparation method and application thereof. The molybdenum oxide nano powder comprises MoO3 and MoO3-x, wherein the range of the x is larger than 0 and less than 1. The MoO3-x is an oxygen-deficient molybdenum oxide, wherein the MoO3-x is rich in a large amount of oxygen defects, thereby greatly increasing electron concentration inside materials, improving light-adjusting efficiency and freely controlling the light-adjusting range of the molybdenum oxide.

The invention is applied to the field of communications, and provides an LED light modulation method and system. The method comprises: receiving LED light modulation request signals; and according to the grade of the LED light modulation request signals and the corresponding brightness of LED input currents, adjusting the brightness of an LED; if the grade of the LED light modulation request signals is smaller than a corresponding brightness of a first current threshold a, adjusting the brightness of the LED by use of a constant conduction time mode; if the grade of the LED light modulation request signals is higher than the corresponding brightness of the first current threshold a and is smaller than the corresponding brightness of a second current threshold b, adjusting the brightness of the LED by use of a PWM mode; and if the grade of the LED light modulation request signals is higher than the corresponding brightness of the second current threshold b, adjusting the brightness of the LED by use of the input current value of the LED. According to the technical scheme provided by the invention, the LED light modulation method and system have the advantages of high light modulation efficiency and simple operation.

A digital micromirror dimming template manufacturing method based on grayscale, which belongs to the field of high dynamic imaging of digital micromirror (DMD) cameras, solves the problem of low efficiency in making dimming templates through continuous dimming and iterative updates, and provides a A more convenient, fast, and easy-to-operate method for making a digital micromirror dimming template. The method of the present invention only needs to collect 5 images under different gray scales in advance, and by synthesizing the dimming template patterns generated under different gray scales, a dimming template with natural transition and strong visibility can be obtained, which is convenient to operate and saves time. The dimming efficiency of the DMD high dynamic range imaging system is improved; at the same time, it is proved that the method of the invention has strong adaptability and high reliability. This method is helpful to realize light intensity control in DMD high dynamic range imaging system.

The invention discloses a method and system for smooth dimming of lamps. The method for smooth dimming of lamps comprises the following steps: a controller receives brightness data of lamps; Multiple PWM dimming output signals; the brightness data is stored in a brightness database, the PWM dimming output signal is saved in a PWM dimming output signal database, and the brightness database is connected with the PWM dimming output signal database through a machine learning module , the two learn through training to achieve intelligent matching. The method and system for smooth dimming of lamps provided by the present invention are suitable for debugging intelligent lamps such as LED lamps. The steps are reasonable and the operation is convenient, which realizes smooth dimming of lamps, makes the dimming softer, and avoids the appearance of a cliff in light effect In the case of a formula mutation, the efficiency of dimming is effectively improved.

A light adjusting device of electrical filter is characterized in that a motor base is fixed on a bottom plate of an instrument; a light adjusting motor is fixed on the motor base; a motor shaft on the light adjusting motor is connected with a worm which rotates on a worm rolling bearing; a worm wheel is fixed on a support base and rotates on a worm wheel rolling bearing; N round holes with identical diameters are uniformly formed on the worm wheel, N filters with different transmittances are inserted in the round holes and fixed on the worm wheel; a zero-position diode pair and a position diode pair are arranged on a bending plate on the worm wheel; the worm can rotate when the light-adjusting motor is electrified and is engaged with the worm wheel to drive the worm wheel to rotate, the position light emitting diode emits position signals during the rotation process of the worm wheel, and the position receiving diode receives the signals and transmits the signals to a light-adjusting motor controller to sequentially display the position of each filter. The invention changes the light adjustment manner of photoelectric instrument from single manual adjustment to electrical adjustment, thus satisfying the automatic requirement of modern optical instruments.

The present invention provides a dimming backlight partition dimming control method, an intelligent terminal and a storage medium, and a dimming backlight partition dimming control method, which is used for partitioning and regulating the brightness of the backlight source of the smart terminal, which includes the intelligent terminal motherboard SOC to obtain image partition information , and brightness information corresponding to the image partition information, and send the image partition information and brightness information to the FPGA; the FPGA receives and parses the image partition information and brightness information, and generates a partition control signal according to the image partition information and brightness information, and at the same time, sends The partition control signal is sent to the driver chip; the driver chip receives the partition control signal, and drives and controls the brightness of the image partition according to the partition control signal. The display screen and brightness information are obtained through the SOC of the intelligent terminal motherboard, and then the driver chips corresponding to the dimming and backlight partitions are uniformly controlled by the FPGA, which improves the dimming efficiency and dimming effect of the dimming and backlight partitions.