44results about How to "Improve contrast performance" patented technology

The invention provides a liquid crystal display brightness control method and device and a liquid crystal display device, and belongs to the technical field of liquid crystal display. The method comprises the following steps: determining image gray scale values of subregion image data blocks according to preset rules and according to received image signals, and pre-extracting subregion backlight values corresponding to subregion image data according to the image gray scale values; multiplying preset backlight valve gain coefficient with pre-extracted subregion backlight values to obtain subregion backlight values of the backlight subregions after gain, wherein the preset backlight valve gain coefficient is larger than 1; and mapping each subregion backlight value after gain to a drive circuit of a backlight source of the corresponding backlight subregion so as to drive and control the brightness of the backlight source of the corresponding backlight subregion. Therefore, contrast quality effect of liquid crystal display frame is improved.

The invention provides an integrated package display module with high contrast and uniform color among modules. The integrated package display module comprises a driver, a PCB, an LED chip, a transparent adhesive layer and a translucent adhesive layer doped with black powder. The driver, the PCB, the LED chip and the transparent adhesive layer are arranged in turn. The translucent adhesive layer is located on one side of the LED chip away from the PCB, and covers the entire PCB.

An illuminating optical system for focusing a radiant light of a light source (1) onto a reflecting light valve (6) and a projection lens (7) for magnifying and projecting a reflected light from the reflecting light valve (6) onto a screen are provided, a diaphragm (31) is disposed at a substantially conjugate position of an entrance pupil of the projection lens (7) on an optical path of the illuminating optical system, the diaphragm (31) has an opening whose area is changed by a light-shielding member, and a shape of a shielded portion of the diaphragm (31) shielded by the light-shielding member is rotationally asymmetric to an optical axis (12) of the illuminating optical system. Accordingly, shielding of necessary light can be better avoided compared with a diaphragm for changing the light-shielding area in a rotationally symmetric manner, for example, a diaphragm for narrowing the opening concentrically, making it possible to improve contrast performance while minimizing brightness reduction.

A display device includes a display panel, a light guide plate (LGP), a plurality of rod-shaped light guide structures, and a light source. The display panel has a display surface. The LGP is disposed above the display surface of the display panel and has an upper surface and a lower surface opposite to each other and a light incident surface connecting the upper surface and the lower surface. The rod-shaped light guide structures are disposed on the lower surface of the LGP and expose a portion of the lower surface. Each of the rod-shaped light guide structures protrudes outside or is embedded into the lower surface. The light source is disposed beside the light incident surface.

According to the present invention, a projection type image display apparatus enables control of a large amount of light masking through a light-masking unit while maintaining a uniform illumination distribution in an area to be illuminated by the illumination light. The apparatus uses two array lenses on which lens cells are arranged in matrix form, where light-masking unit masks the array lens installed on the light source side in their particular area. The light-masking unit adjusts the amount of light emitted from the light source. The light-masking area of lens cells adjacent to lens cells closest to an optical axis is made smaller than the light-masking area of other cells.

A polarizer to improve contrast for LCD from down view angle is produced by laminating a triacetate cellulose (TAC) sheet on each side of a polyvinyl alcohol (PVA) sheet and further on the toppest triacetate cellulose (TAC) sheet applying a surface-treatment layer that is a protective film formed by black dye mixture to inhibit dark-state light leakage and improve the contrast for LCD from down view angle.

The invention discloses an external insulation configuration parameter measuring method for live-detection electrical equipment. The method comprises the steps: 1) a signal modulator generates a frequency signal to drive a laser emitter to emit a laser beam with stable wavelength; 2) the laser beam generates a narrowband scanning monochromatic laser ray through processing so as to perform scanning projection on the detected equipment; 3) the narrowband scanning monochromatic laser ray reflected by the detected equipment is acquired; 4) a three dimensional image for the detected equipment is obtained by means of processing of the acquired image information through a processing module, and the external insulation configuration characteristic parameter for the detected equipment can be obtained through calculation according to the three dimensional image; and 5) a laser reception and phase detection unit receives the laser ray, and can acquire the reference point cloud data on the laser ray on the surface of the detected equipment and correct the calculated result data. The external insulation configuration parameter measuring method for live-detection electrical equipment utilizes the monochromatic laser ray with stable wavelength to scan the detected equipment to restrain the information of other wave bands of the background, so that the accuracy for the related information of the image of the detected equipment can be improved.

The invention provides a laser additive manufacturing diffuser crack defect DR detection image processing method which comprises the following steps: acquiring a nickel-based superalloy additive manufacturing diffuser crack DR detection image by using a DR detection system; calculating a gray scale distribution histogram of the DR detection image, and determining related algorithm parameters according to distribution characteristics of the histogram; processing the DR image by using the determined parameters to preliminarily improve the image contrast; subjecting the processed image to gaussian mask cycle multiple times of processing, and improving the contrast ratio of the image further; and performing unsharp de-sharpening edge filtering operator processing based on a spatial linear filter imfilter on the image after mask processing. The invention is based on a contrast-limited adaptive histogram equalization algorithm and carries out optimization, contrast enhancement and image detail information enhancement are carried out, and an image defect processing effect is achieved.

The present invention discloses a region backlight adjustment device and an adjustment method thereof. The region backlight adjustment device comprises an image information module, a manual operation backlight adjustment module, a control module and a backlight driving module. The image information module is configured to output region backlight signals and field sync signals to the control module, and the manual operation backlight adjustment module is configured to output manual operation backlight adjustment signals to the control module; the control module is configured to read the region backlight signals and the manual backlight adjustment signals according to the field sync signals, and calculate the duty ratio of region brightness control signals according to the region backlight signals and the manual operation backlight adjustment signals to output the duty ratio to the backlight driving module; and the backlight driving module is configured to adjust the region backlight brightness according to the duty ratio of region brightness control signals, so that the manual backlight adjustment and the region backlight adjustment are combined, and the region backlight brightness is dynamically adjusted according to the image brightness and the whole screen brightness, therefore the contrast effect of the screen is improved.

An illuminating optical system for focusing a radiant light of a light source (1) onto a reflecting light valve (6) and a projection lens (7) for magnifying and projecting a reflected light from the reflecting light valve (6) onto a screen are provided, a diaphragm (31) is disposed at a substantially conjugate position of an entrance pupil of the projection lens (7) on an optical path of the illuminating optical system, the diaphragm (31) has an opening whose area is changed by a light-shielding member, and a shape of a shielded portion of the diaphragm (31) shielded by the light-shielding member is rotationally asymmetric to an optical axis (12) of the illuminating optical system. Accordingly, shielding of necessary light can be better avoided compared with a diaphragm for changing the light-shielding area in a rotationally symmetric manner, for example, a diaphragm for narrowing the opening concentrically, making it possible to improve contrast performance while minimizing brightness reduction.

The invention relates to a gesture recognition method for optimizing projection symmetry approximate sparse classification, and the method comprises the steps: firstly, carrying out the normalizationcorrection of a gesture image, extracting gesture features, and building an OP-SYSRC algorithm and then adopting Faster R-CNN algorithm of target identification and using transfer learning to construct a gesture recognition model, and adding the constructed OP-SYSRC algorithm after region selection and feature extraction programs are carried out on the model for training and testing the model. Under the big data gesture recognition environment, the recognition and contrast performance of gesture images under the large database capacity is greatly improved, and the data expandability of the system is ensured.

The present invention discloses a double-layer structured low-resistance and low-reflectiviy transparent conductive film, comprising a fine metal powder and a black powder and a silica-based low-reflectivity layer. The lower layer has irregularities on the surface thereof: the average thickness is within a range of from 50 to 150 nm, and the average thickness is within a range of from 50 to 85% of that of the convex portions, with an average pitch of the convex portions may be within a range of from 20 to 300 nm. The fine metal powder particles are dispersed in a solvent with or without alkoxysilane contained therein. The transparent conductive film of the invention is formed by coating the coating material onto a substrate, drying the coated film, and coating a solution of alkoxysilane or a hydrolyzed product thereof.

The invention discloses a composition for forming a transparent conductive film, wherein the composition includes a dispersion solution prepared by dispersing fine metal powder particles with an average primary particle size of 5-50 nanometers in a solvent containing a dispersant. into; the fine metal powder forms secondary particles, the particle size distribution of the secondary particles is 10% cumulative particle size up to 60 nanometers, 50% cumulative particle size is 50 ~ 150 nanometers and 90% cumulative particle size is 80 ~500 nm. ∴