Uniform Pixel Control in Micro-LED Displays

Display method for spliced LED (MLED) displays that reduces image sticking and improves display consistency. The method involves compensating the gray scale of sampled frames during playback. The compensation is based on initial gray scale data, filtered temperature influence data, and a target gray scale compensation. This avoids acquiring screen temperature. Compensating frames without temperature measurements improves uniformity and reduces image sticking compared to uncompensated frames.

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Display and electronic device with reduced power consumption for still images while maintaining consistent color. The display uses a microLED with a control circuit that includes a triangular wave generator, comparator, switches, and transistors. When displaying a still image, the first transistor retains the data potential. A triangular wave is output to the pixels. The comparator generates an output signal based on the retained potential and triangular wave. Switches control the microLED current based on the output signal. This allows the microLED to continue emitting at reduced brightness without PWM when the display is static.

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MicroLED structure and chip design that enables higher packing density and simplified manufacturing compared to conventional microLED designs. The microLED structure has the active layer extending horizontally beyond the top and bottom electrode layers. This prevents the active layer from touching the electrode edges. The electrode layers are aligned vertically. This allows the active layer to be continuously formed across the entire chip, with multiple microLEDs sharing the same active layer. Isolation structures are used between microLEDs, with at least a portion formed in the active layer. This allows the active layer to extend fully across the chip without interruption. The isolation structures prevent light crosstalk between adjacent microLEDs.

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Display panel and device with improved resolution and aperture ratio by using microprisms to concentrate light from individual LED pixels. The display panel has LED chips, driving circuitry, and an encapsulation layer. Microprisms are arranged above the LEDs, with one prism corresponding to each LED. The prisms have protrusions that focus the LED light. This reduces the angle of emitted light, minimizing mixing with neighboring pixels and eliminating the need for black matrix. It also brings the prism closer to the LED for better focusing. The prisms can be disposed on the encapsulation layer or directly above the LEDs. This reduces color shift, improves aperture ratio, and decreases pixel pitch compared to conventional displays with black matrix.

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A light-emitting device with improved scratch resistance and bend tolerance while still allowing thin, flexible substrates. The device uses two adhesive layers with specific properties between the substrates and the light-emitting element layer. The first adhesive layer has a thickness of 10-25 μm and shear modulus of 4.0E+04 - 1.0E+05 Pa at 23°C. The second adhesive layer has a thickness of >0-15 μm and shear modulus of >1.0E+05 Pa at 23°C. This combination allows high pencil hardness on the device surface while preventing defects in the light-emitting element layer from substrate bending.

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A display device that actively controls the viewing angle of displayed images to protect privacy. The display has a mode switching mechanism that allows pixels to be turned off in a first mode to block light emission, reducing viewing angle. In the second mode, pixels emit light normally. This allows the user to toggle between a narrow view angle for privacy and a wider view angle for normal use. The switching is achieved by turning off a transistor in the pixels in the first mode. This allows the display to process image data the same way in both modes to reduce power consumption.

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Display substrate and display apparatus with reduced IR-drop in organic light-emitting diode (OLED) displays. The display has a lapping connection between the OLED cathode and the power supply line near the bottom of the display region. This reduces the length and resistance of the lead wires connecting the power supply to the bottom chips compared to lapping only between the cathode and a separate power line. It also covers the connection regions for both the bottom sub-connections and the main power connections. This reduces IR-drop in the display. The connection regions are formed by lapping vias or planarization layers.

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Stretchable display with stretchable electrode connections and encapsulation for flexible displays. The display has a substrate with islands connected by narrower connection parts. The display elements are on the islands and electrode connections are made across the narrower connection parts. This allows the connection parts to stretch without breaking the electrode connections. The display is encapsulated with an inorganic layer around each display region. This prevents delamination during stretching. The inorganic layer surrounds the connections and encapsulates the display region. This allows stretching without breaking the electrode connections.

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Display correction method for LED screens with high integration of LED lights. It accurately adjusts LED lights to uniform brightness and chromaticity by dividing LED operation into multiple sub-field conduction states based on principles like pulse width compensation. Real response data and brightness ratios are collected in each sub-field to determine the actual mapping between response and brightness. This mapping is used to correct brightness/chromaticity coefficients when compensation pulses are present, improving display uniformity.

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Grayscale compensation method for improving display uniformity by selectively compensating grayscale of subpixels in specific display areas. The display area is divided into a first area and multiple second areas. The average brightness of the second areas is determined. Grayscale compensation is applied only to subpixels in the second areas to match their brightness to the target. This reduces brightness variation between areas. The compensation involves adjusting grayscale gains for subpixels of different colors. Boundary interpolation is used where subpixels straddle area boundaries.

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Brightness compensation method for display panels that improves accuracy of repairing mura (uniformity issues) using an external Demura system. The method involves determining the compensation weight for each pixel in a more accurate manner than traditional methods like mean, mode, median, or fitting. Instead, it expands the area surrounding the pixel being compensated and uses the grayscale values of that expanded area to calculate a more tailored compensation weight for the original pixel. This reduces accuracy loss during compression and restoration compared to using a fixed weight for all pixels in a block.

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Compensating display panels for uniformity issues by addressing brightness and color non-uniformities separately. The compensation involves driving the display to show a white image frame and a monochrome image frame. From the white frame, brightness compensation values are generated for each display area based on the white frame data. From the monochrome frame, brightness compensation values are generated for each subpixel based on the monochrome frame data. Finally, the subpixel compensation values are combined with the area compensation values to get the overall compensation for each subpixel. This allows reflecting both brightness differences between subpixels and color differences between display areas in the compensation.

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Compensating display panels to mitigate color uniformity issues like Mura. The method involves calculating a target brightness for a specific pixel based on the average brightness of pixels of the same color. If the pixel's brightness is significantly lower or higher than the average, it indicates unevenness. The target brightness is set accordingly to compensate. This per-pixel adjustment improves color uniformity by balancing brightness levels within a color channel.

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Single-point correction method, device and system for LED display screens to improve image quality without increasing costs for smaller pitch displays. The method involves iteratively adjusting the brightness of individual LEDs to correct color non-uniformity in a localized area. A correction device analyzes a small region of the display and identifies the brightness values of each LED. It then calculates optimal corrections to the brightness of specific LEDs to match a target color balance for that region. The corrected brightness values are sent to the LED controller to implement the adjustments. This iterative process is repeated for other regions to fine-tune the display's color uniformity.

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Correcting brightness uniformity in mini LED displays with small pixel pitches to mitigate blockiness in low gray levels. The method involves compensating for current fluctuations in mini LEDs that cause brightness variations. It does this by dividing the adjustment range of the preset current into stages and separately mapping the fluctuation difference data for small and large current ranges in each stage. This allows more accurate correction of current fluctuations at low gray levels where brightness sensitivity is higher.

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Driving LED-based displays with high color depth, power efficiency, and reduced brightness variation, especially for micro-LED-based displays like those in AR/VR headsets. The display uses separate digital drive circuits on a silicon wafer and analog drive circuits on an indium-gallium-zinc-oxide (IGZO) layer between the micro-LED wafer and silicon wafer. This allows optimizing the digital and analog circuits using different processes. The analog circuits in IGZO have a higher voltage, lower leakage, and better uniformity for driving micro-LEDs, while the digital circuits on silicon generate control signals. The separation with level shifters avoids large transition regions.

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Compensating brightness and chromaticity of display devices like miniLED displays to improve uniformity and color accuracy. The method involves calculating segmented compensation curves for each pixel based on its response characteristics in active array (AM) driving mode. This provides better compensation compared to linear methods. The segmented curves are generated by measuring compensation coefficients for a few initial current levels and then segmenting the uniformity change curve. This allows optimized compensation for each pixel's non-linear LED response.

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This is a method for transferring micro-LEDs from a transfer substrate to a target substrate to improve display uniformity. The method involves sequentially transferring micro-LED blocks from the transfer substrate to the target substrate. The key aspect is to ensure that the direction of the micro-LED electrodes in the second block matches the direction of the first block. This helps minimize luminance and chromaticity differences at the block boundaries. This is accomplished using different transfer substrates with micro-LEDs having electrodes in different directions.

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Micro-LED display panel pixel structure that improves display quality by optimizing luminance uniformity between pixels. The pixel uses a reflective layer with transmissive windows on the micro-LED. The reflective layer surrounds the micro-LED encapsulated in a transmissive filling material. The transmissive windows allow light from the micro-LED to directly pass through the reflective layer. The windows farther from the micro-LED have larger areas to compensate for light attenuation. This provides uniform luminance across pixels.

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Calibrating LED display screens with mixed modules from different batches to eliminate brightness and chromaticity variations between batches without full rescreen calibration. After initial calibration, measure the corrected brightness and chromaticity of each module. Use these values to determine a common target for secondary calibration. Then, apply the target to uniformly correct the entire screen. This avoids assembly and site calibration for mixed screens by leveraging the initial calibration data.

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