524 results about "Dark line" patented technology

The invention provides a gate drive circuit and method and a display device and relates to the technical field of display. The method includes the steps that gate row drive scanning is performed on shifting register units located in a first area in the gate drive circuit; after gate row drive scanning of the shifting register units in the first area is finished, touch scanning is performed; after touch scanning is finished, the last-level shifting register unit located in the first area is scanned again so that the last-level shifting register unit located in the first area can be used for pre-charging a first-level shifting register unit located in a second area; gate row drive scanning is performed on shifting register units located in the second area in the gate drive circuit, and the last-level shifting register unit located in the first area is in cascade connection with the first-level shifting register located in the second area. The method can overcome the defect that the row pixel charging rate is insufficient and solve the problem of dark lines or poor bright lines.

The invention relates to a method and device for correcting the brightness of an LED display device. The method includes the steps that (a1) a shot image of a set picture displayed by the LED display device is acquired; (a2) the shot image is analyzed and processed to obtain the glow brightness of a plurality of lamp point areas in the shot image corresponding to a plurality of LED lamp points of the LED display device respectively, wherein the effective light-emitting area of each lamp point area in the lamp point areas is used as one of calculation factors of the glow brightness of the lamp point area; (a3) the brightness correction coefficients of the LED lamp points are calculated according to the glow brightness of each lamp point area in the lamp point areas and a brightness correction target value. According to the method and device, in order to solve the bright/dark line problem caused by the inconsistency of the spatial arrangement positions of the LED lamp points on the LED display device, the bright/dark line is compensated in a brightness adjusting/correcting mode, the display effect of the LED display device can be corrected, and therefore the evenness and consistency on human vision are achieved.

The invention relates to a display panel, which is characterized in that the opening area of any sub-pixel arranged in a first transition display area is larger than that of a same-color sub-pixel arranged in a first display area, and the opening area of any sub-pixel arranged in the first transition display area is less than that of a same-color sub-pixel arranged in a second display area; the minimum distance between any two most adjacent same-color sub-pixels arranged in the first display area is x, the minimum distance between any two most adjacent same-color sub-pixels respectively arranged in the first transition display area and the second display area is y, and the minimum distance between any two most adjacent same-color sub-pixels arranged in the second display area is z, y is greater than or equal to x and less than or equal to z, and the opening area of the sub-pixel is a light emitting area of the sub-pixel. The display panel can effectively reduce the difference in visionof users due to the different sub-pixel per inch (PPI) between the first display area and the second display area, avoid the occurrence of dark spots or dark lines and improve the display effect. Theinvention further provides a display device.

The invention discloses an image processing method and a device thereof for achieving seamless splicing large screen display. An image segmentation processing module segments an image into a plurality of image blocks, gap images are added to a joining edge part of each adjacent image block, and the formed images are sub-images, wherein the gap images are identical to the images of the edge part of each image block after segmentation; after brightness adjustment, each sub-image is projected to a corresponding display unit for displaying; and the gap images of each adjacent sub-image are guided into the gaps between adjacent display units by guiding optical structures in the display units so that dark lines formed at splicing gaps of the display units are brightened to truly achieve seamless splicing without causing image pixel losses, the image transition between the splicing display units is more natural and smoother, and the overall display effect is better.

The invention relates to a splicing bright-dark line correction method which is applicable to splicing type display screens such as an LED screen. The splicing bright-dark line correction method comprises the steps of determining the size of each display bright block and the size of each display dark block according to the size of splicing units, then controlling and lightening the display screen so as to be provided for shooting to acquire a target image; carrying out image processing on the target image so as to acquire the gray scale center of each of the plurality of bright blocks, and then calculating the display unit spacing and the splicing gap spacing; and finally, calculating a correction coefficient of each marginal display unit, which is adjacent to a splicing gap, of the splicing units by using the display unit spacing and the splicing gap spacing so as to be used for correcting a bright-dark line caused by the splicing gap. According to the invention, people can carry out correction on the bright-dark line accurately by only shooting one image through designing the display unit lightening mode; and furthermore, a problem that the display body uniformity get poor because bright-dark line correction in the prior art is carried out through full-screen analysis can also be avoided.

An optometric apparatus and an optometric method includes the steps of acquiring subject's attributes and an orientation selected by the subject on an astigmatic axis determination chart displayed on the computer screen, displaying vision measurement charts in the acquired orientation and the orientation perpendicular thereto to acquire visual recognition limits selected by the subject, calculating far point distances based on the acquired visual recognition limits and the acquired subject's attributes, and calculating a refractive power based on the acquired orientation and the calculated two far point distances. The far point distance is calculated using a neural network that has been determined by a number of subjects in advance. The astigmatic axis determination chart has four groups of a plurality of parallel lines, each group having lines arranged in their respective orientation, and the vision measurement chart has a plurality of light and dark line images of different sizes, thereby reducing the risk of presenting an erroneous refractive power.

The invention provides a shifting register unit, a grid drive circuit and a driving method and a display device, relates to the technical field of display, and can solve the problem that dark lines appear on a display screen as a threshold voltage drifts. The shifting register unit comprises a first input circuit, a second input circuit, an output circuit and a pull-up node reset circuit, wherein the first input circuit is used for outputting a voltage of a first voltage end to a pull-up node under control of a first signal terminal; the second input circuit is used for outputting a voltage of a second voltage end to the pull-up node under control of a second signal terminal; the output circuit is used for outputting a voltage of a clock signal terminal to the signal output end under control of the pull-up node; and the pull-up node reset circuit is used for outputting a voltage of a third voltage end to the pull-up node under control of a third signal terminal.

The invention discloses a display device and a driving method thereof. The driving method comprises the following steps: first, the positive and negative polarity changes of a picture of a current frame and a picture of a next frame of a pixel array are compared; then, whether a first overvoltage drive lookup table or a second overvoltage drive lookup table is applicable is judged, the first overvoltage drive lookup table is applicable if there is no positive and negative polarity switching between the picture of the current frame and the picture of the next frame, and the second overvoltage drive lookup table is applicable if there is positive and negative polarity switching between the picture of the current frame and the picture of the next frame; a gray scale voltage difference is determined according to the applicable first overvoltage drive lookup table or second overvoltage drive lookup table; and next, overvoltage driving is performed on the pixel array with the gray scale voltage difference. The driving method provided by the invention can improve the problem of bright and dark lines under a low gray scale and improve the picture quality.

The invention provides a unit pixel structure for liquid crystal displays. A liquid crystal display comprises an array substrate, a color film substrate, and liquid crystal; the array substrate and the color film substrate face each other; the liquid crystal is arranged between the array substrate and the color film substrate; the liquid crystal is in a UV vertical alignment mode; the array substrate comprises scan lines, data lines and pixel electrodes; the scan lines and the data lines intersect crisscross; the pixel electrodes are limited by the scan lines and the data lines intersecting; black lines occur to a pixel electrode area due to UV vertical alignment; the edge of the pixel electrodes is partially provided with a radial slit pattern protruding out. The unit pixel structure has the advantages that the edge black lines expand out of the pixel electrodes, force of the ITO fringe field upon liquid crystal molecules moves out, the dark lines are moved out of an aperture area, a Fine Slit structure enables the black lines to move out to be eliminated, load of resistance and capacitance of an array panel is not increased much, aperture ratio is not lowered, and light transmitting efficiency of UV vertical alignment displays is increased.

The invention discloses an LED display screen system and a rectifying method for bright and dark lines thereof. The system comprises an LED display screen, an LED display control unit, a bright and dark line display data collecting device used for collecting bright and dark line display data from the LED display screen and generating bright and dark line imaging information, and a bright and dark line rectifying coefficient calculating unit used for calculating bright and dark line rectifying coefficient according to the bright and dark line imaging information. The method comprises the steps of hitting a white screen, collecting the bright and dark line data, calculating the bright and dark line rectifying coefficients and rectifying the bright and dark lines. The LED display system adopting the bright and dark line rectifying method of the LED display screen system is accurate in rectification due to the fact that optical imaging information is used as a basis, and can avoid bright and dark line adjusting mistakes caused by visual errors. Bright and dark line rectifying coefficient software is used for automatically calculating the bright and dark line rectifying coefficient, and a bright and dark line rectifying algorithm is utilized, so that calculation precision is high. Bright and dark line rectifying documents are generated according to modules, so that management is convenient. The technology has special timeliness and flexibility when used for rented LED display screens and arc-shaped LED display screens.

The invention relates to a Mini-LED backlight component and a manufacturing method thereof. The Mini-LED backlight component comprises a backboard and a plurality of rectangular lamp panels with Mini-LEDs in array arrangement; the lamp panels are arranged on the backboard in an array arrangement manner, and a joint is arranged between every two adjacent lamp panels; the backboard is provided withgrooves corresponding to the joints; and the joints and the grooves are filled with cured white glue. The invention also provides the corresponding manufacturing method of the Mini-LED backlight component. By virtue of the Mini-LED backlight component and the manufacturing method thereof, the problem of dark lines between the lamp plates of the LED backlight component is solved

The invention relates to a splicing bright-dark line correction method which is applicable to splicing type display screens such as an LED screen. The splicing bright-dark line correction method comprises the steps of determining two complementary screen body display unit lightening modes according to the size of splicing units, then controlling and lightening the display screen according to the determined screen body display unit lightening mode so as to be provided for shooting to acquire two complementary target images; carrying out image processing on the acquired target images respectively so as to acquire the gray scale center of each display bright block, and then calculating the display unit spacing and the splicing gap spacing; and finally, calculating a correction coefficient of each marginal display unit, which is adjacent to a splicing gap, of the splicing units by using the display unit spacing and the splicing gap spacing so as to be used for correcting a splicing bright-dark line caused by the splicing gap. According to the invention, people can carry out correction on the bright-dark line accurately by only shooting two images through designing the screen body display unit lightening modes; and furthermore, a problem that the screen body uniformity gets poor because splicing bright-dark line correction in the prior art is carried out through full-screen analysis can also be avoided.

The invention relates to a splicing bright and dark line compensation method and a related compensation device applicable to LED displays, comprising the following steps: (a) acquiring location information and resolution information of multiple physical splicing units of a target display; (b) drawing a distribution map of multiple virtual splicing units according to the location information and resolution information, wherein the multiple virtual splicing units and the multiple physical splicing units are in one-to-one correspondence relationship; (c) marking the boundary region of each virtual splicing unit in the distribution map; (d) selecting a target boundary region in the distribution map; and (e) adjusting the brightness of the edge pixels of the physical splicing unit corresponding to the target boundary region to a target brightness in order to compensate the splicing bright and dark lines of the target display. Therefore, the problem that splicing bright and dark line adjustment takes a long time and the problem that on-site splicing bright and dark line positioning is difficult can be solved.

An image of a light beam, which has been totally reflected from an interface between a dielectric material block and a thin film layer of an analysis chip for supporting a sample, is detected with photodetector and as a two-dimensional image constituted of pixels arrayed in a beam width direction and an incidence angle direction, which are perpendicular to each other. An abnormal pixel row, which contains a pixel represented by abnormal pixel data, is extracted from among pixel rows, each of which extends in the incidence angle direction, in the array of the pixels constituting the two-dimensional image and in accordance with an output of the photodetector. A position of a dark line in the light beam, which has been totally reflected from the interface, is detected from the pixel data corresponding to the pixel rows other than the abnormal pixel row.

The invention relates to a method for compensating spliced bright and dark lines. The method comprises the steps that 1, a shot image of a spliced display screen with a plurality of same-color display units lightened is acquired; 2, area locating is carried out on the shot image to acquire the width and height of an image area, corresponding to a display area of the spliced display screen, in the shot image; 3, the mapping dimensions and splicing positions of a plurality of spliced units of the spliced display screen are acquired; 4, whether the spliced bright and dark lines exist on each spliced position or not is determined; 5, the brightness compensation coefficients of edge display units of the spliced units on the two sides of the spliced positions with the spliced bright and dark lines are determined to compensate the spliced bright and dark lines. One single-color image is shot, brightness statistic analysis is carried out according to a statistics unit, the positions of the spliced bright and dark lines on the image can be found precisely and fast, and the spliced bright and dark lines can be compensated. Therefore, efficiency can be improved, and the problems that a traditional method is long in consumed time, low in efficiency and high in requirement for correction personnel are solved.

The invention discloses an imaging system of drilling internal fracture space attitude, belongs to the technical field of physical parameter measurement of a rock mass and aims at overcoming the shortcomings of complicated process, low degree of mechanization and low precision of measurement result of existing drilling imager adopting data line transmission and image blur or dark lines and the like caused by artificial push of a drill rod. The imaging system comprises a drilling imager host and a drilling imager probe in wireless connection with the drilling imager host, wherein the drilling imager probe is arranged in the middle of a centering device; the tail of the centering device is connected with one end of the push rod; the push rod is also connected with a probe push device; under the effect of the probe push device, the drilling imager probe is pushed through the push rod; a depth counter is also arranged in the probe push device, is in wireless connection with the drilling imager host and sends a depth signal measured by the depth counter to the drilling imager host; and the imaging system also comprises a computer connected with the drilling imager host. The imaging system disclosed by the invention is suitable for the mining, construction and tunnel construction processes.

A display apparatus according to the present invention is provided with a matrix-type liquid crystal panel and a switching liquid crystal panel, the matrix-type liquid crystal panel and the switching liquid crystal panel assembled together. In the display apparatus, a polarity of a voltage applied on an electrode pair of the switching liquid crystal panel is inverted once in substantially one vertical period or in one or more vertical period. With this arrangement, it is possible to reduce a number of bright line or dark line. This attains display quality improvement and power consumption reduction.

False contouring during display by time division gray scales can be prevented with high efficiency. The order of appearance of subframe periods, and the times at which the subframe periods begin, are changed between pixels driven by odd number gate signal lines and pixels driven by even number gate signal lines. For example, assume that display is performed in a display period T_r1 of a subframe period SF₁, a display period T_r2 of a subframe period SF₂, and a display period T_r3 of a subframe period SF₃. The order of appearance of the display periods is changed between pixels driven by the odd number gate signal lines (B1) and pixels driven by the even number gate signal lines (B2). Although the non-light emitting display periods (display periods T_r3, T_r2, and T_r1) are continuous over nearly one frame period in the odd number lines of pixels when there is a gray scale change, non-light emission and light emission are repeated alternately at the same time for the even number lines of pixels. Accordingly, the brightness of the above light emission is averaged by human eyes, and therefore the generation of unnatural dark lines (false contouring) can be suppressed.

Embodiments of the invention provide a non-contact method for measuring the surface profile of an object that can include generating a point-type optical signal and projecting it on a rotatable precision optical grating, generating a rotating pattern of light and dark lines onto the object, recording a series of images of the rotating pattern moving across the object with an image receiving device and calculating the surface profile of the object. Other embodiments can include a method to calibrate the system and a non-contact apparatus that generally includes a point-type light source, a rotatably mounted optical grating being configured to project a moving grating image on the object, a processor in communication with the image capturing device and configured to receive image input from the image capturing device and generate a surface profile representation of the object therefrom.