OLED Pixel Block Segmentation for Characteristic Deflection Compensation
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Solution Overview
Problem
The existing organic light emitting display technologies face challenges in maintaining uniform transistor characteristics across a panel due to limitations in laser crystallization methods, leading to characteristic deflections and image defects, particularly at boundary portions where the laser irradiation is incomplete.
Innovation Solution
The proposed solution involves dividing the pixel block into areas with different pixel arrangements in each direction to compensate for characteristic deflections by using a data compensation unit that applies correction values based on position information and interpolation methods, ensuring precise correction in directions with significant deflections while optimizing memory usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the pixel block is divided into areas with different pixel arrangements in each direction to compensate for characteristic deflections, then image quality is improved, but device complexity increases
Solution Approach 1:
The pixel block is divided into multiple areas with different pixel arrangements in horizontal and vertical directions. Each area has its own correction coefficient, allowing localized compensation for characteristic deflections caused by laser crystallization boundaries. This segmentation enables precise correction without requiring complex global compensation mechanisms.
Solution Approach 2:
Different regions of the pixel block are assigned different correction coefficients based on their specific position relative to laser crystallization boundaries. The data compensation unit applies location-specific correction values to compensate for local characteristic deflections, rather than using a uniform correction approach across the entire panel.
2Manufacturing precision
If correction values are applied for each pixel block direction, then image defects are reduced, but memory usage increases
Solution Approach 1:
Correction coefficients are stored and applied in segmented blocks rather than individually for each pixel. Each pixel block contains multiple pixels that share the same correction coefficient, significantly reducing the total number of correction values that need to be stored in memory while maintaining effective compensation across the display panel.
Solution Approach 2:
The correction coefficients are stored as compact parameter values representing correction factors for groups of pixels. By changing from storing individual pixel corrections to block-level parameter representations, memory usage is optimized while preserving the ability to compensate for characteristic deflections.
Data Source
AI summary
An organic light emitting diode (OLED) display is disclosed. One aspect includes a pixel unit including a plurality of pixels formed at portions at which scanning lines and data lines intersect with each other; a scan driver for supplying scan signals to the scanning lines. The OLED display further comprises a data driver for supplying data signals to the data lines; and a data compensation unit changing the input data using a correction coefficient stored as a unit of a pixel block including a plurality of pixels and supplying the changed input data to the data driver. In such OLED display, the pixel block is divided so that the number of pixel arranged in the first direction is different from the number of pixel arranged in the second direction which intersects with the first direction.