Micro-LED Display Repair

A method for repairing flexible transparent LED displays without having to replace the entire display if faulty components are found. The method involves softening the encapsulation layer surrounding the faulty component, accessing and repairing the component, then curing the softened encapsulation layer. The softening is done by heating the display to a temperature that melts the encapsulation material but avoids damaging other components. This allows repairing individual faulty components in flexible transparent LED displays without needing to replace the entire display.

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Display panel with improved optical performance, reliability and production yield, using a cluster-based approach. The panel is built by connecting clusters of LEDs on interposers using hub boards. Each cluster is a self-contained unit with LEDs, driver IC, and encapsulation. This allows replacing defective clusters instead of individual LEDs or whole panels. The encapsulation protects against moisture and contamination. The clusters are manufactured using techniques like overmolding to form light-shielding layers.

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Method for manufacturing micro LED displays with high yield and low cost after transferring the micro LEDs from the growth substrate. The method involves repairing defective or missing micro LEDs by filling vacancies or replacing failed micro LEDs in some areas, rather than retransferring the entire display. This allows using the original substrate with intact micro LEDs alongside repaired areas. The repaired micro LEDs have their own substrate, electrical connections, and pins. The connections between the repaired and original areas use solder, glue, wire bonding, or PCB pads. This avoids retransfer issues and reduces cost compared to replacing all defective micro LEDs.

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Maintenance method for Mini/Micro LED integrated package display devices to repair defective pixels without compromising reliability and adding a matte surface finish. The method involves replacing the failed LED chip, partially filling the repair area with regular resin and curing, then completely filling and curing with modified resin containing boron trifluoride-monoethylamine. The modified resin cures faster internally compared to the surface, creating stress that causes an orange peel texture for a matte finish.

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LED display panel with consistent packaging surface and method for preparing and maintaining it. The panel has a glossy outer layer over the encapsulation layer. This glossy layer is formed by molding with a glossy release film. The glossy layer is then treated and coated with a thermosetting anti-glare coating. This provides a consistent surface without pattern issues. To maintain consistency during repairs, the damaged area is dug out, filled, and polished to match the surrounding encapsulation level. Then the treated area is coated with anti-glare coating and cured. This prevents a visible repair seam with inconsistent light emission.

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Method for inspecting and repairing micro LED displays to reduce rework and improve yield. The method involves using a probe card with micro spring tips to test micro LEDs after transfer. Defective pixels are identified by EL inspection. Replacement micro LEDs are mounted using a stamping process. This avoids rework issues that can occur with traditional repair methods.

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Display unit with improved repairability and a method to repair it. The display unit has cutting lines around the edge with identification points. This allows precise machine processing of excess material during repairs. The identification points cover the edges around the display circuitry. By cutting along these lines, excess encapsulation can be removed without affecting the functional area. The width of the cuts is greater than 200um. This allows accurate secondary processing after removing and replacing faulty components. It avoids issues like misalignment or overcutting when reworked.

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Color compensation method for LED displays with multiplexed pixel layouts to improve display yield and efficiency when LED chips fail. The method involves compensating for color defects caused by damaged pixels by analyzing surrounding pixels and adjusting the compensated display. It uses quadrilateral or parallelogram pixel arrangements with 4x multiplexing. The bright spot positions and values are captured from original images, then compensated image brightness and texture factors are calculated. Weighted averaging is done based on these factors to evaluate compensated image quality.

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Driving backplane, display screen, and display repair method that allows efficient repair of mini LED and micro LED displays without removing failed pixels. The backplane has spare contact pairs and overlapping electrodes for each pixel area. When a main LED fails, the overlapping electrode is connected to the spare contact to replace the main LED without removing it. This is done by detecting failed LEDs, identifying the faulty main color and location, and swapping it with a backup of the same color. The repair is done on the backplane without touching the main LED, improving repair efficiency and success rate compared to removing and reattaching a new LED.

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Device, method, control system and electronic equipment to repair blind spots on a real pixel display screen. The repair involves actively controlling individual subpixels in a display to compensate for blind spots. When a subpixel is lit, the brightness of the other two subpixels is set to zero. This creates a virtual pixel arrangement where all lit subpixels form a larger effective pixel. This is done using a data processing module between decoding and encoding the display signal. By actively controlling subpixels instead of replacing modules, it allows repairing a few blind spots without replacing the entire screen.

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Micro LED display with redundant pixels to prevent defects and blurring. The display has adjacent micro LEDs in each pixel that emit light based on the location of defective LEDs. If a micro LED doesn't emit properly, the adjacent micro LED compensates by emitting more light. This prevents defective pixels from being easily visible. The display also has a mapping system to track defective LEDs and generate correction maps to optimize light output.

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Display panel with improved yield by increasing repairability of subpixels. The display panel has pixels with multiple LED setting areas - a main area and at least one redundant area. This allows more LED replacements and repairs in subpixels prone to damage, improving yield. By selectively increasing redundant areas in certain subpixels, it balances repairability and pixel size.

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Repair method for micro LED displays to replace defective pixels with new ones while maintaining physical and electrical stability. The method involves removing the defective micro LED from the display, forming elastic conductive pads on the exposed panel electrodes, transferring the new micro LED to electrically connect to the elastic pads, covering with a protective layer, and curing to form an elastic coupling between the new micro LED and pads. This prevents movement due to temperature changes and maintains electrical connection.

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Compensating for dead pixels in display modules during manufacturing to avoid color defects without repair processes like laser cutting. The method involves adjusting the colors of adjacent pixels when a dead pixel is found in one of them. If a dead subpixel is detected in a pixel, the neighboring pixels with live subpixels are reconfigured to provide the missing colors. This prevents color defects when a dead pixel is transferred during display module production.

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Method for returning dead pixel data in an LED display to improve efficiency and reduce costs compared to existing methods. The method involves each LED module in the display capturing local dead pixel data from its sub-pixel groups, combining it with the dead pixel data from the next module, and sending that combined data back to the previous module. This cascading of dead pixel information allows consolidating and reducing the number of IDs needed to address the display. A main control chip in each module handles the local data collection and transmission instead of separate cards.

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Compensating display defects by interpolating pixel values from normal areas to update defective pixels. The method involves capturing images of the display at various brightness levels, identifying defective pixels, and interpolating compensated pixel values from normal pixels at the brightness level. This interpolated pixel value is then used to update the defective pixel value at that brightness. This is repeated for each brightness level. By compensating defects at different brightnesses, it addresses issues like uneven brightness affecting compensation accuracy.

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A method for repairing dead pixels in four-primary-color displays that provides efficient, fast, and low-cost repair of dead pixels in four-primary-color displays without adding spare pixels or complex calculations. The repair method involves using the surrounding pixels to compensate for the color and brightness of the dead pixel. The compensation is based on the proximity of the dead pixel to the surrounding pixels. If the dead pixel is closer to a primary color pixel, more compensation is applied to that primary color. This mimics the human visual system's perception of color mixing. The compensation is applied by adjusting the brightness and primary color levels of the surrounding pixels. This preserves the overall color gamut and brightness of the display while repairing dead pixels.

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Repairing method for display modules with reduced repair marks and improved appearance after repair. The method involves using an epoxy resin with reversible covalent bonds in the packaging layer. When repairing a damaged chip, the damaged epoxy is removed and a fresh epoxy is filled in. The reversible bonds allow self-repair of the interface between the old and new epoxy layers. This prevents repair marks and maintains smoothness compared to conventional epoxies. The reversible bonds break during curing and reform between the layers.

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Display panel with improved repair yield for microLED displays. The panel has a driving backplane with original microLEDs and repair microLEDs. The repair microLEDs have larger spacing between their sides and the backplane compared to the original microLEDs. This prevents transfer heads used for simultaneous repair of multiple defective microLEDs from touching and damaging nearby functioning microLEDs during repair. By keeping repair microLEDs farther from the backplane, it reduces the risk of damage to surrounding functional microLEDs during repair.

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Manufacturing method, display module, and repair method for display modules that enable easy repair and maintain consistent color after repair. The method involves adding a soft adhesive layer between the LED chips and the protective film. This allows the film to be removed and chips replaced without damaging the surrounding chips. After repair, the film is replaced and the adhesive cured to restore protection. The soft adhesive layer between the chips prevents damage during repair.

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