35results about How to "Avoid halo phenomenon" patented technology

The invention discloses an LED upside-down mounting structure. Silica gel is uniformly plated on an LED chip. Fluorescent glue is plated on the surface of silica gel. The upper surface of the fluorescent glue is provided with a lens. The upper surface of the lens is provided with an anti-reflection film. The upper surface of the anti-reflection film is provided with a packaging glue layer. The silica gel and the fluorescent glue are successively filled in an insulated reflection cup. A metal reflection cup is arranged outside the insulated reflection cup. A light absorbing layer is arranged outside the metal reflection cup. The packaging glue layer is filled among the reflection cup, the lens and the light absorbing layer. A sapphire substrate on a lowest layer is preprocessed for forming an inverse-T-shaped structure. One ceramic film epitaxial wafer is grown on the surface of the inverse-T-shaped structure. Then a high-temperature-resistant conductive film is grown on the upper surface of grooves at two ends. A heat conductive glue layer with certain thickness is uniformly plated on the boss of the inverse-T-shaped structure. The LED upside-down mounting structure can prevent a halo effect. Furthermore the LED upside-down mounting structure has advantages of effective light outlet quality improvement, excellent heat radiation performance, small packaging dimension and easier optical matching.

The invention discloses an image enhancement method on the basis of an improved multi-scale Retinex theory. The method comprises the following steps of: carrying out nonlinear adjustment on the details of dark areas and the brightness of highlighted areas by virtue of a global brightness adjustment function; enhancing an image by virtue of a canonical gain compensation multi-scale Retinex algorithm; and according to the mean brightness value of a selected area, calculating the parameters of an S curve, adaptively adjusting the S curve, and carrying out the procedures of nonlinear mapping and the like on the enhanced image, thus finishing the enhancement on the image. The method disclosed by the invention solves the problems that when the conventional multi-scale Retinex theory method is used, a halo phenomenon is caused, the overall brightness of an enhanced high dynamic range image is insufficient, and the contrast ratio of the image is low. According to the invention, the S curve is self-adaptively adjusted according to the brightness of the central area of the image, and then the nonlinear mapping is performed on the image, so that the gradation of the image is stretched, and the contrast ratio of the image is improved; and the robustness of the algorithm on a complex night vision image is improved.

A method and system for adjusting screen brightness uniformity of a spliced ​​display device, wherein the method includes the steps of: dividing the screen into a middle area and a border area, and detecting the average brightness value of each pixel in the middle area and the minimum brightness value of pixels in the border area ; Calculate the compensation parameters of the middle area according to the average brightness value and the minimum brightness value, and calculate the compensation parameters of the boundary area according to the minimum brightness value; perform brightness for each pixel in the middle area of ​​the screen according to the compensation parameters of the middle area Compensation: Compensate the brightness of the border area of ​​the screen according to the compensation parameters of the border area; perform border fading processing on the compensated screen. The brightness uniformity is improved by the solution of the invention.

The invention relates to a light emitting module and a light emitting keyboard. The light emitting module comprises a circuit board, a light emitting unit, a transparent glue layer, a light guide plate, and a reflective layer. The light emitting unit is arranged on the circuit board, and has a light-out surface used to emit light. The transparent glue layer has a first gluing part and a second gluing part, the first gluing part has a first side and a second side which face each other, the second gluing part has a third side and a fourth side which face each other, the first side of the first gluing part is arranged on the circuit board, and the third side of the second gluing part is adhered to the light-out surface of the light emitting unit. The light guide plate has a light-in surface used to receive light transmitted via the second gluing part. The light-in surface faces the light-out surface of the light emitting unit, and the light-in surface of the light guide plate is adhered to the fourth side of the second gluing part. The reflective layer is arranged under the light guide plate, and the bottom side of the reflective layer is adhered to the second side of the first gluing part. The light-in surface of the light guide plate and the light-out surface of the light emitting unit are connected by the second gluing part, and therefore, the phenomenon of halo can be avoided.

The invention provides a method and a device for enhancing a low-illumination image. The method comprises the following steps of: calculating an enhancement gradient of at least one channel image of an original image; establishing an objective function for solving a luminance component and a reflection component with respect to at least one channel image; Solving an objective function of at leastone channel image to obtain a luminance component and a reflection component of the at least one channel image; Calculating at least one channel enhanced image based on a luminance component and a reflection component of the at least one channel image; synthesizing the enhanced images of each channel, or synthesizing the enhanced images of one channel with the original images of other channels toform the enhanced low-light images. Since the reflection component and the luminance component are not solved in the logarithmic domain in the objective function, the noise in the image is effectivelysuppressed, and a 1-norm constraint is performed when the gradient of the luminance component is constrained, so that the halo phenomenon in the image enhancement result can be effectively avoided.

The invention discloses a structure and design method for reducing the mixed light area of ​​Mini LED, which is used to solve the problem of light leakage and slight halo caused by the mixed light phenomenon in the Mini LED structure. Encapsulation: There is an arc-shaped convex cup on the convex-shaped sealant. The invention ensures that the surface of the colloid is in the state of an arc-shaped convex cup by controlling the package shape of the chip colloid, and uses the principle of concentrating light by a convex mirror to effectively reduce the projection on the module after the chip emits light. The generated area; through the optimization of the Mini LED dispensing technology and its structure, the convergence of light transmission is realized, and then the mutual independence of each single-particle light-emitting area is realized, the phenomenon of mixed light is reduced, and the delicate expression of the product screen display is finally realized, avoiding light Halo phenomenon, to achieve higher contrast.

The invention provides an image defogging method. The method comprises the following steps: step one, collecting a fog-contained image; step two, obtaining an initial atmospheric scattering function according to a boundary condition of the image; step three, refining the initial atmospheric scattering function by using a recursive two-sided filterer; step four, obtaining a local contrast by using the recursive two-sided filterer again; step five, on the basis of the local contrast, carrying out processing adaptively on fogged areas with different fog concentrations; and step six, obtaining a defogging result rapidly based on an image degradation model, carrying out hue adjustment, and then outputting and displaying a final result. With the method, edge information of the defogging result can be kept well and the detail is clear. Moreover, no residual fog and vignetting effect occurs at an area with a sudden change of the depth of field; the real scene is recovered to the greatest extent; and the visual feelings of people can be realized wholly.

The invention discloses an image defogging method based on dark channel information, which belongs to the technical fields of image processing and computer vision. The method proposed by the present invention first uses the minimum value filter to calculate the minimum value of each pixel for each color channel of the input image, and then calculates the statistical value of the dark channel of the image under different scale parameters, and calculates the dark channel statistics corresponding to each scale parameter Gaussian smoothing filtering is performed on the value, the filtered dark channel statistical value is assigned different weight values ​​according to different scale parameters, and the transmission coefficient of the scene is calculated by optimizing the weighted channel statistical value to realize the dehazing process of the image. The application of the present invention can avoid complex soft matting optimization steps and computational complexity of dehazing processing, and the image quality of dehazing processing is high, and can meet the requirements of real-time processing applications.