5results 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 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.

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.