Tile Boundary Compensation for Display Panels
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Solution Overview
Problem
Tile-based displays often experience alignment, rotational, and gap errors due to imperfect tile alignment, leading to visible tile boundaries and artifacts that disrupt user experience and are costly to correct.
Innovation Solution
Processing circuitry receives image data to identify and correct tile boundary errors by resampling and adjusting the luminance of display pixels using gain masks and point spread functions, ensuring accurate pixel placement and reducing the visibility of tile boundaries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple tiles are assembled to form a large display panel, then the display area is increased, but alignment errors and gap errors cause visible tile boundaries
Solution Approach 1:
The display system is divided into multiple independent tiles that can be manufactured separately and then assembled. Each tile contains its own display pixels and can be processed independently, allowing for modular manufacturing while achieving large display areas through concatenation of multiple segments.
Solution Approach 2:
The system applies gain masks that modify the luminance parameters of display pixels located at tile boundaries. By adjusting the brightness parameters of boundary pixels differently from interior pixels, the visual discontinuities caused by alignment errors are compensated, making tile boundaries less visible.
2Manufacturing precision
If tile boundaries are corrected through hardware modifications, then visibility of boundaries is reduced, but manufacturing complexity and cost increase
Solution Approach 1:
The patent replaces physical hardware modifications with a software-based image processing solution. Instead of mechanically adjusting tile positions or adding optical components to correct boundaries, the system uses processing circuitry to apply gain masks that digitally adjust pixel luminance values, thereby reducing boundary visibility through computational methods rather than mechanical means.
3Manufacturing precision
If gain masks are applied to compensate for tile boundaries, then boundary visibility is reduced, but overall image luminance may be affected
Solution Approach 1:
The gain masks apply different luminance adjustment parameters to different spatial locations within the display. Pixels at tile boundaries receive different gain values compared to interior pixels, allowing localized compensation for boundary issues while preserving the overall luminance characteristics of the display image.
Solution Approach 2:
The system measures the actual luminance output of display pixels and uses this feedback information to calculate appropriate gain mask values. By monitoring the luminance of boundary pixels and comparing it to expected values, the system dynamically adjusts gain parameters to maintain uniform overall luminance while compensating for boundary discontinuities.
Data Source
AI summary
An electronic device may display image content via a tile-based display by controlling light emission from display pixels of the tile-based display. Based on image data associated with the image content, a processing circuitry of the tile-based display may receive a potential tile boundary. The processing circuitry may resample the image data based on geometry of the tile boundary and positions of the display pixels on the tile-based panel. After resampling the image data, the processing circuitry may adjust gain of the tile boundary display pixels according to a gain mask to compensate for the tile boundary.