10results about How to "Accurate brightness" patented technology

The utility model provides a kind of low-power MiniLED backlight control system, it is related to LED backlight technical field, including light bar, the both ends of the light bar are provided with connecting head, multiple electric connecting pins are provided in the inside of two connecting heads, multiple installation clamping grooves are set in the upper end of the light bar, multiple lamp holders are clamped in the inside of multiple installation clamping grooves, multiple electrode pieces are provided in the left and right sides of the lower end of multiple installation clamping grooves, multiple control chips are connected to the lower end of the light bar, multiple control chips are respectively located in the lower end of multiple installation clamping grooves, and electrically connected with the two electrode pieces of the lower end of installation clamping groove, and multiple control chips are electrically connected with multiple electric connecting pins of the front and rear sides, the utility model is provided with multiple-pin connecting head in the both ends of light bar, lamp holder is clamped with light bar by installation clamping groove, electrode piece is electrically connected with control chip, so that lamp holder can be individually repaired and replaced, reduce maintenance cost, and support quick assembly and flexible expansion.

The invention provides an intelligent lamp control system, which relates to the technical field of illumination and comprises the following steps of: emitting laser by using a laser head to form a laser positioning point; the laser ranging head records the time from transmitting to receiving of the laser signal so as to obtain the distance of the measured object; the main control chip generates a control signal according to the distance of the measured object; according to the generated control signal, the control signal is transmitted to an external power supply through an AC control chip or a DC control chip, and the external power supply adjusts the working state of the light source according to the received control signal; the lamp system is monitored in real time through the state indicating head. The invention provides an intelligent control system for a lamp. The intelligent control system solves the problem that requirements in different environments cannot be met.

The invention provides a display panel, a brightness compensation method thereof and a display driving chip. The problem that in the prior art, the brightness of a display image of the same gray scale is not uniform is solved. The display panel comprises a display area, the display area comprises a plurality of sub-display areas, and the brightness compensation method comprises the following steps: acquiring the voltage drop of the display area, the screen body current of the display area and the resistance of any sub-display area; based on the voltage drop, the screen body current, the resistance of any sub-display area and a preset relation model: Lumn is in direct proportion to (K-I * Rn) 2, determining the actual display brightness of any sub-display area; determining a brightness compensation value of each sub-display area based on the actual display brightness of the sub-display areas; and performing brightness compensation on the sub-display area based on the brightness compensation value. And the phenomenon of excessive brightness compensation is almost avoided.

The invention relates to a large-aperture projection lens, which comprises a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens, a seventh lens and an eighth lens which are sequentially arranged along the direction of an optical axis, and is characterized in that the first lens, the fourth lens, the fifth lens, the seventh lens and the eighth lens have positive focal power; the second lens, the third lens and the sixth lens have negative focal power, and the sixth lens and the seventh lens are doublet lenses and have positive focal power; by reasonably setting the focal length and the entrance pupil diameter of the lens, the lens has the characteristics of large aperture, small size and low cost, does not defocus under the environmental condition of large temperature difference, and is stable in working performance, high in projection quality and wide in application range.

The invention discloses a perimeter device and a view detection method, and relates to the technical field of medical detection.The perimeter device comprises a shell, a light source, a digital micromirror device, an imaging unit, an image acquisition unit and a controller; the digital micro-mirror device is arranged in the shell and is used for receiving light emitted by the light source and then generating an optical stimulation pattern; the imaging unit is installed in the shell and used for projecting the optical stimulation pattern to the eye fundus of the human eye for imaging; the image acquisition unit is mounted in the shell and is used for acquiring image data of human eyes; the controller is electrically connected with the image sensor and the digital micro-mirror device and used for calculating the rotation angle of the eyeball according to the image data of the human eyes and adjusting the position, where the optical stimulation graph is generated, on the digital micro-mirror device according to the rotation angle of the eyeball. And the image of the optical stimulation pattern projected to the eye fundus of the human eye through the imaging unit moves along with the eyeball.

This invention provides a method, apparatus, and system for correcting laser speckle contrast images, relating to the field of image processing technology. The method includes: acquiring multiple speckle images; determining a light intensity distribution map based on each speckle image; determining an original speckle contrast image of the target speckle image; determining a local light intensity variation coefficient map based on the light intensity distribution map, wherein each pixel in the local light intensity variation coefficient map represents the variation coefficient of pixel intensity in the neighborhood of the pixel in the light intensity distribution map; correcting the values ​​of corresponding pixels in the original speckle contrast image based on the values ​​of each pixel in the local light intensity variation coefficient map, obtaining and outputting a corrected speckle contrast image. Using this application can reduce the influence of uneven illumination on laser speckle images, resulting in more uniform brightness and accurate contrast in blood flow images, thereby improving the accuracy of blood flow velocity estimation.

Embodiments of the present application relate to a display panel and a display device, the display panel comprising: a plurality of pixel units, each pixel unit comprising a plurality of light emitting devices; a plurality of driving wires; a plurality of driving circuits, each of the plurality of driving circuits being connected to one of the plurality of light emitting devices through one of the plurality of driving wires, each driving circuit being configured to output a driving signal to an anode of the connected light emitting device; wherein the length of the driving wire of each light emitting device in the same pixel unit is negatively correlated with the light-on duration of the light emitting device, and the driving wire is a wire connected between the output end of the driving circuit and the anode of the light emitting device. By adjusting the length of the driving wire of each light emitting device, the transmission duration of the driving signal to each light emitting device can be changed accordingly, thereby providing a display panel with accurate color and better display effect.

The invention discloses a grading method for core fluorescence brightness and area calculation based on deep learning. The grading method comprises the following steps: S1, forming a labeled fluorescence region data set and an unlabeled fluorescence region data set; s2, preprocessing the core fluorescence images in the labeled fluorescence region data set and the unlabeled fluorescence region data set; s3, segmenting and marking the fluorescent region; s4, constructing a semi-supervised model; s5, based on the label data and the pseudo label data in the extended data set, performing quantitative calculation on the brightness and the area of the fluorescent region by using an improved deep convolutional neural network model; s6, outputting a fluorescence brightness grade and a geological characteristic evaluation result of the rock core; and S7, storing the grading result and related calculation data in a database, and generating an analysis report. The method can improve the efficiency of large-scale data processing while improving the fluorescence brightness and area calculation precision, and can dynamically adapt to the characteristics of different rock core samples.

The embodiment of the utility model provides a floor lamp circuit, a circuit board thereof and a floor lamp, and the circuit comprises a control circuit which is used for outputting a light source PWM signal of which the peak value is a first voltage; the first PWM circuit comprises a first isolation module, a switch module and a first connection module; wherein the first connecting module is connected with the first lamp source; the first isolation module is connected with the control circuit and is used for outputting an action signal according to the light source PWM signal; the switch module is connected with the first connection module, is connected with the control circuit at the joint with the first connection module, and is used for filtering and outputting a first driving signal with the peak value being second voltage according to the action signal and the power supply voltage; correspondingly, the control circuit feeds back and outputs a light source PWM signal according to the first driving signal, and the first connecting module drives the first light source according to the first driving signal. The first driving signal is output through filtering, so that the influence of ripple waves on feedback adjustment and driving is reduced, and the lighting quality of the floor lamp is improved.

This disclosure relates to a voltage value determination method, apparatus, electronic device, and storage medium. The method includes: determining a three-dimensional voltage value space corresponding to a preset voltage value range for RGB three color channels; determining whether the center point of the three-dimensional voltage value space satisfies a first preset condition; when the first preset condition is satisfied, outputting the coordinates of the center point of the three-dimensional voltage value space to a driving unit; when the first preset condition is not satisfied, re-determining the three-dimensional voltage value space, making the voltage value range of the RGB three color channels corresponding to the re-determined three-dimensional voltage value space smaller, and re-executing the steps of determining whether the center point of the three-dimensional voltage value space satisfies the first preset condition and subsequent steps. The voltage value determination method according to the embodiments of this disclosure can improve the accuracy of the voltage values ​​of the RGB three color channels. Therefore, when providing voltage to the display unit with the determined voltage values, the actual brightness and actual color of the display unit can be more accurate.