49results about How to "Improve uneven lighting" patented technology

The invention discloses a pixel circuit, a driving method, a display panel and a display device. The pixel circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a drive transistor, a first capacitor and a second capacitor. By the matching of each transistor and each capacitor, the pixel circuit achieves at least one of the following benefits that the voltage drop of threshold voltages and power supply signals of a drive current and the drive transistor is irrelevant to cross voltages of the two ends of a light emitting component, and the influence of the factors is eliminated, so that the problem of non-uniformity of luminance of the display device is effectively improved, and the uniformity of luminance and the display effect of the display device are improved.

An embodiment of the invention discloses a grayscale compensation method and system of an OLED display panel. The method includes: acquiring the actual display brightness of each subpixel of the OLED display panel under an actual input grayscale, and calculating the corresponding relationship between the actual input grayscale of each subpixel and the actual display brightness of each subpixel; determining the target display brightness of each subpixel under a preset input grayscale according to the target brightness of each subpixel under the 255th grayscale and the target gamma value of the OLED display panel; determining the target input grayscale of each subpixel when each subpixel displays the target display brightness according to the corresponding relationship between the actual input grayscale of each subpixel and the actual display brightness of each subpixel; determining a grayscale compensation value according to the target input grayscale of each subpixel and the preset input grayscale. By the grayscale compensation method, light-emitting unevenness among the subpixels of the OLED display panel is improved.

The invention provides a pixel circuit, a driving method, a display panel and a display device. The pixel circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a driving transistor, a storage capacitor and a light emitting element. Through cooperative driving of all the transistors and the storage capacitor, the driving current of the driving transistor can be unrelated to the gate-source voltage and the threshold voltage of the driving transistor, so adverse influences are eliminated, the phenomenon that the display panel and the display device are non-uniform in light emission is effectively relieved, and the light emission uniformity and the display effect of pictures displayed by the display panel and the display device are improved.

The invention discloses a workpiece clamping structure for a grinding tool, and a tracking type casting edging machine and method. The workpiece clamping structure comprises a workbench, the workbench is provided with a plurality of positioning devices, at least one positioning device comprises a cylinder and a clamping block, and the clamping blocks clamp or leave a workpiece to be machined, under the action of cylinder piston rods. The tracking type casting edging machine comprises a bed, a moving mechanism, a grinding head assembly, the above-mentioned workpiece clamping structure, an industrial camera, a visual recognition system and a control system. The edging machine can quickly grind flash and burrs on a casting according to the requirements of a production drawing and the shape and size of the casting, without programming and equipment adjusting during casting replacement, the production efficiency is high, and machining error is small.

The invention discloses a pixel circuit as well as a driving method, a display panel and a display device thereof. The pixel circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a driving transistor, a first capacitor and a second capacitor. Through the cooperation between all transistors and the capacitors, the pixel circuit as well as the driving method, the display panel and the display device thereof can achieve one of the following benefits at least: the driving current is enabled to be unrelated to the threshold voltage of the driving transistor, the pressure drop of a power supply signal, and the step voltage of the two ends of a light-emitting element; as the influence of the forenamed factors is eliminated, the problem that the conventional display device is uneven in light emission is further improved effectively, and the uniformity of luminance uniformity and the display effect of the display device are improved.

An embodiment of the invention discloses a brightness adjusting method and system of an OLED display panel. The method includes: acquiring the actual display brightness of each subpixel of the OLED display panel under actual input voltage, and calculating the corresponding relationship between the actual input voltage of each subpixel and the actual display brightness; using the average value of the display brightness of all the same-color subpixels of the OLED display panel under preset input voltage as the target display brightness of all the same-color subpixels of the OLED display panel under the preset input voltage; determining the target input voltage of each subpixel when the subpixel displays the target display brightness according to the corresponding relationship between the actual input voltage of each subpixel and the actual display brightness; using the difference value of the target input voltage of each subpixel and the preset input voltage as the voltage compensation value which is fed back to the OLED display panel for voltage compensation. By the brightness adjusting method, light-emitting unevenness among the subpixels of the OLED display panel is improved.

The invention discloses a pixel circuit as well as a driving method, a display panel and a display device thereof. The pixel circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a driving transistor, a first capacitor, a second capacitor and a light-emitting element, through the cooperating driving between all transistors and the two capacitors, the driving current is enabled to be unrelated to the threshold voltage of the driving transistor and the step voltage of the two ends of the light-emitting element finally. According to the pixel circuit as well as the driving method, the display panel and the display device thereof, the influence of undesirable factors is eliminated, the problem that the conventional display device is uneven in light emission is further improved effectively, and the uniformity of luminance and the display effect of the display device are improved.

The invention relates to a method for detecting citrus fruits on a tree. The method comprises the steps that the local and global information entropies are combined to analyze the illumination distribution characteristic of an image, and a local block homomorphic filtering algorithm is used to process illumination unevenness of the image; an adaptive enhanced RG color difference method is used toimprove the contrast between a foreground target and the background; threshold segmentation and a mathematical morphology method are used to realize the binarization of an RG chromatic aberration diagram; for the problem of multi-fruit adhesion or mutual occlusion in an acquired binary image, marker-controlled watershed transformation is used to realize adhesion region segmentation; a convex hulltheory is used to solve the problem of region under-segmentation caused by occlusion to acquire an independent candidate citrus fruit region; the histogram description feature of the candidate citrusfruit region is extracted; and citruses are identified by a histogram cross-core support vector machine to complete fruit location. According to the technical scheme provided by the invention, the accuracy and reliability of the detection of the citrus fruits on the tree are improved.

The invention discloses a pixel circuit and a display device. The pixel circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a driving transistor, a first capacitor, and a second capacitor. According to the pixel circuit and the display device, the driving current and the driving transistor are finally prevented from being influenced by threshold voltage via cooperative driving of the transistors and the two capacitors, the influence of adverse factors is eliminated, the problem of non-uniform light emission of the display device is effectively improved, and the light-emitting uniformity and the display effect of the display device are improved.

The invention discloses a display substrate and a manufacturing method thereof and aims to solve the problem that during an existing OLED substrate manufacturing process, an organic light-emitting function layer bends due to an infiltration effect, light-emitting unevenness of internal edge areas of pixels is caused, and the light-emitting performance of a whole device is affected. The method includes: forming a pixel definition layer in the non-display area of a substrate, wherein the pixel definition layer comprises an upper hydrophobic layer and a lower hydrophilic layer; forming the organic light-emitting function layer in the display area of the substrate; forming a blocking film layer only covering the non-display area on the pixel definition layer. The manufacturing method has the advantages that during display substrate manufacturing, the edge areas, causing the light-emitting unevenness, of the organic light-emitting function layer in the non-display area can be blocked by the blocking film layer, the light-emitting unevenness in the pixels is improved, and the light-emitting performance of the whole display substrate is increased.

The embodiment of the invention discloses a display panel brightness adjusting method and system. The method comprises the steps of obtaining a total input current of all sub-pixels in display panel preset areas under a preset input gray scale; according to the total input current and a target total current, determining an area to be compensated of the display panel; obtaining display brightness of all the sub-pixels in the area to be compensated; according to the display brightness and target brightness, determining a display compensation value of all the sub-pixels in the area to be compensated; feeding back the display compensation value to the display panel for brightness adjustment, wherein the display panel comprises multiple preset areas, and each preset area comprises at least two sub-pixels. According to the display panel brightness adjusting method and system, uneven luminescence among all the sub-pixels of the display panel is improved.

The invention discloses a backlight module and a display device. The backlight module comprises a backboard. The backboard comprises a base and a side frame connected with the base. The base and the side frame form an accommodating space. A plurality of LEDs and a reflective layer are provided in the accommodating space. Multiple LEDs are located on one side of the base facing the light emitting surface of the backlight module. Multiple LEDs are arranged in a matrix. The reflective layer is located on one side of the base facing the light emitting surface of the backlight module. The reflective surface of the reflective layer faces the light emitting surface of the backlight module. The backlight module comprises a light-emitting area and a non-light-emitting area. The non-light-emitting area surrounds the light-emitting area. The light-emitting area comprises a first area and a second area. The first area surrounds the second area. The first area comprises a plurality of LEDs. The second area comprises a plurality of LEDs. The reflectivity of the reflective layer located in the first area is greater than the reflectivity of the reflective layer located in the second area. The display device comprises the above backlight module. The backlight module and the display device provided by the invention can effectively improve the brightness unevenness of the backlight module.

The invention relates to a correction method for non-uniform illumination of mahjong images based on figure classification. The correction method comprises the following steps: (1) inputting mahjong row and line numbers of integrally typesetted mahjong blocks to be detected, and acquiring a background image; (2) inputting the acquired image containing the integrally typesetted mahjong blocks, and dividing the acquired image to obtain an integrally typesetted mahjong block grey-scale map; (3) separating all single mahjong blocks from the integrally typesetted mahjong blocks according to an equal interval method; (4) conducting illumination type classification on each mahjong block according to illumination features; (5) conducting mean value normalization processing on each classified mahjong block; (6) sharpening the integrally typesetted mahjong block grey-scale map; (7) enhancing integrally typesetted mahjong block patterns according to chromatic information; and (8) denoising each classified mahjong block. As targeted illumination correction is conducted on the different types of single mahjong blocks according to the illumination features of the mahjong images, the image quality is effectively improved, and the recognition rate of mahjong typesetting is improved.

The invention provides a backlight module and a display device. The display device comprises a backlight module and a display panel. The backlight module comprises a backplane, a light guide plate and a light source, wherein the backplane comprises a plurality of backplane bulges and corresponding backplane pits thereof, the light guide plate comprises a plurality of pits, the backplane bulges of the backplane are embedded into the pits of the light guide plate, and the light source is arranged on at least one side of the light guide plate. According to the invention, the heat dissipation effect can be improved by using the backplane pits of the backplane.

The embodiment of the invention discloses a pixel driving circuit, a driving method thereof and a display panel. The pixel driving circuit comprises a light-emitting device, a driving transistor and a switching transistor. An active layer of the switching transistor comprises an oxide semiconductor, and the switching transistor is connected between a grid electrode of the driving transistor and an initialization voltage end and is connected between the grid electrode of the driving transistor and one of a source electrode or a drain electrode of the driving transistor. According to the first light-emitting control signal, an initialization signal or a data signal with a threshold voltage compensation function is transmitted to the grid electrode of the driving transistor, and the problem that the light-emitting device emits light unevenly due to the fact that the voltage of the grid electrode of the driving transistor is unstable is solved through the low leakage current characteristic of the switching transistor. The problem that a flicker phenomenon is easy to occur when the display panel adopts a low-frequency driving mode to display is solved, and the display quality of the display panel is improved.

The invention discloses a pixel driving circuit and a display device. Two transistors with opposite conductive characteristics are arranged, so that when a data signal is at a high level, the data signal is transmitted to a control node to charge a storage capacitor; when the data signal is at a low level, the storage capacitor is controlled to discharge so as to lower the potential of the controlnode; and in the charging stage, a luminescent device is controlled not to emit light. According to the invention, the influence of the transistor threshold voltage on the potential of the control node is improved, the phenomenon of non-uniform light emission during charging is improved, and the picture quality is improved.

A backlight module and a display device including the backlight module are provided. The backlight module includes a reflective plate and a plurality of light sources, wherein the reflective plate has a reflective surface and the light sources are disposed on the reflective surface generating light in a direction away from the reflective surface. The reflecting surface includes a plurality of low reflection portions, wherein the reflectivity of the low reflection portion is lower than the reflectivity of other positions on the reflective surface. The low reflection portions are disposed between the light source and adjacent light sources.

The invention provides an array substrate, a display panel and a preparation method thereof. The array substrate includes a substrate; a thin film transistor layer prepared on the substrate, the thinfilm transistor layer comprising a first region corresponding to a display region and a second region located outside the first region, a portion of the thin film transistor layer corresponding to thesecond region comprising a GOA circuit; An insulating layer prepared on the thin film transistor layer; and a power supply signal line formed on the insulating layer corresponding to the second region to provide a power supply voltage, wherein at least a portion of the power supply signal line overlaps with the GOA circuit, and the power supply signal line is partially insulated from the part ofthe thin film transistor layer corresponding to the GOA circuit.

The embodiment of the invention provides a display panel. The display panel comprises a driving circuit layer, a first electrode layer, an auxiliary electrode layer, a pixel definition layer and an electronic transport layer. The driving circuit layer comprises a first surface and a second surface which are oppositely arranged; the first electrode layer partially covers the first surface; the auxiliary electrode layer partially covers the first surface; the auxiliary electrode layer and the first electrode layer are arranged on the same layer; a gap is reserved between the auxiliary electrodelayer and the first electrode layer; the pixel definition layer covers the driving circuit layer, the first electrode layer and the auxiliary electrode layer; a first through hole is formed in the pixel definition layer; and the electron transmission layer is arranged on the side, away from the driving circuit layer, of the pixel definition layer and connected with the auxiliary electrode layer through the first through hole. By setting the energy level difference between the lowest empty orbit of the electron transport layer and the work function of the auxiliary electrode layer to be 2.0 eVor below, the injection barrier between the auxiliary electrode layer and the electron transport layer is reduced, and the phenomenon that the display panel emits light unevenly is improved.

The invention discloses a transparent electrode comprising a substrate, a metallic mesh, metal nano wires and conductive polymers. The metallic mesh is formed on the substrate, the metal nano wires are formed on the metallic mesh, and the conductive polymers are formed on the metal nano wires; or the blending system of the metal nano wires and the conductive polymers is formed on the metallic mesh. By employing the transparent electrode, the phenomenon that the brightness is nonuniform can be effectively improved, and the preparation procedure is simplified. Furthermore, the invention also discloses an OLED device and a transparent electrode preparation method.

The invention discloses an OLED display panel and an OLED display device. The OLED display panel and the OLED display device have the advantages that the OLED display panel is divided into a pluralityof sub-display areas, the storage capacitance is large and the working current is relatively large in the sub-display area far away from one side of a driving area, so that the small working currentat one side, far away from the driving area, of the traditional OLED display panel can be compensated and the non-uniformity of luminescence is improved. Compared with a double-layer SD structure design, the OLED display panel and the OLED display device have the advantages that the manufacturing process is simplified, the production cost is reduced, and the wide applicability of the display device can be improved.

The invention discloses a pixel circuit as well as a driving method, a display panel and a display device thereof. The pixel circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a driving transistor, a first capacitor, a second capacitor and a light-emitting element, through the cooperating driving between all transistors and the two capacitors, the driving current is enabled to be unrelated to the threshold voltage of the driving transistor and the step voltage of the two ends of the light-emitting element finally. According to the pixel circuit as well as the driving method, the display panel and the display device thereof, the influence of undesirable factors is eliminated, the problem that the conventional display device is uneven in light emission is further improved effectively, and the uniformity of luminance and the display effect of the display device are improved.

The invention discloses a display panel and a preparation method thereof, and a display device. The display panel comprises a substrate; an anode layer which is arranged on the substrate; a pixel defining layer which is arranged on the anode layer and is provided with an opening, wherein the opening forms a pixel area used for containing pixel ink; an OLED device layer which is arranged on the anode layer of the pixel region, wherein the pixel defining layer is in an L-shaped step shape, and the middle thickness of the pixel defining layer is smaller than the edge thickness. According to the display panel, the preparation method thereof and the display device, the L-shaped stepped pixel defining layer is prepared, and the middle thickness of the L-shaped stepped pixel defining layer is smaller than the edge thickness, so that the film thickness at the edge and the middle of an OLED device layer formed by ink-jet printing is uniform, and the problems of non-uniform luminescence or shortservice life and the like are solved.

The invention discloses a brightness enhancement film and a curved surface displayer. The curved surface displayer comprises a liquid crystal panel and the brightness enhancement film. The brightnessenhancement film comprises base material and multiple first microstructures which are arranged in the middle area of the base material and multiple second microstructures which are arranged on the twoends of the base material. The first microstructures of the brightness enhancement film are corresponding to the normal display area of the liquid crystal panel. The second microstructures of the brightness enhancement film are corresponding to the bending area of the liquid crystal panel. Different angles of microstructures are designed in different areas of the brightness enhancement film to bematched with the bent liquid crystal panel so that the light is enabled to be vertically incident to the bent liquid crystal panel as much as possible, curved surface displayed can be realized without bending the backlight module group and the problem of non-uniform light emission of curved surface display can be improved.

An embodiment of the invention discloses a brightness adjusting method and system of an OLED display panel. The method includes: acquiring the actual display brightness of each subpixel of the OLED display panel under actual input voltage, and calculating the corresponding relationship between the actual input voltage of each subpixel and the actual display brightness; using the average value of the display brightness of all the same-color subpixels of the OLED display panel under preset input voltage as the target display brightness of all the same-color subpixels of the OLED display panel under the preset input voltage; determining the target input voltage of each subpixel when the subpixel displays the target display brightness according to the corresponding relationship between the actual input voltage of each subpixel and the actual display brightness; using the difference value of the target input voltage of each subpixel and the preset input voltage as the voltage compensation value which is fed back to the OLED display panel for voltage compensation. By the brightness adjusting method, light-emitting unevenness among the subpixels of the OLED display panel is improved.

The invention discloses an automobile LED tail lamp. The automobile LED tail lamp comprises a lamp holder and a lampshade which are connected to form a cavity through hot melt adhesive; xenon fills the cavity; a lighting part which is controlled through a circuit board is arranged on the lamp holder; light transmitting mirrors are oppositely obliquely arranged at two sides of the lamp holder. The automobile LED tail lamp has the beneficial effects that the structural design is reasonable, and the mounting is convenient; the light transmitting mirrors are oppositely obliquely arranged, so that the light condensing effect is great, and the phenomenon of non-uniform lighting of the automobile tail lamp can be greatly reduced; the lighting part is composed of a plurality of LED beads, and therefore, the lighting range is expanded, and the driving safety is improved; meanwhile, pedestrian at the back can be warned; the circuit board and the lighting part are matched, so as to improve the stability of the tail lamp.