Curved Display Image Distortion Correction via Luminance Mapping
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Solution Overview
Problem
Curved display devices experience significant image distortion due to their curvature, causing irregular size changes when viewed from different angles, which affects viewer immersion and convenience.
Innovation Solution
An apparatus comprising a virtual curved surface generator, a coordinate mapping unit, and a luminance converter that adjusts image data luminance levels based on the viewing distance and curvature radius to correct image distortion by mapping virtual pixels onto actual pixels on the curved display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a curved display panel is used to provide intensified immersion to viewers, then viewer immersion is improved, but image distortion occurs in horizontal and vertical directions due to curvature and viewing distance changes
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing correction values for luminance and chrominance in a lookup table before image display. The correction values are computed based on the curved display panel's geometric parameters (curvature radius, pixel pitch, diagonal length) and viewing distance, allowing real-time distortion correction without complex runtime calculations. This pre-processing approach enables the system to compensate for curvature-induced distortion proactively rather than reactively.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting luminance and chrominance parameters based on viewing distance and panel curvature. The correction process modifies the luminance parameter using the formula L_corrected = L_original × (1 + k1 × (d - d0)/d0) and chrominance using C_corrected = C_original × (1 + k2 × (d - d0)/d0), where d is viewing distance and d0 is reference distance. These parameter transformations enable adaptive distortion correction across varying viewing conditions.
2Device complexity
If image data is displayed directly without correction on a curved panel, then device complexity is reduced, but non-linear distortion is generated in up/down/left/right directions
Solution Approach 1:
The patent introduces an intermediary correction module between the image source and the curved display panel. This intermediary component includes a lookup table storing pre-computed correction values and a correction unit that retrieves and applies appropriate correction factors based on pixel position and viewing parameters. This intermediary layer isolates the complexity of distortion correction from both the image source and display driver, allowing them to operate independently while achieving accurate distortion compensation.
3Manufacturing precision
If correction values are calculated in real-time based on viewing distance and curvature, then image distortion is reduced, but processing time and computational load increase
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing correction values for luminance and chrominance in a lookup table before image display. The correction values are computed based on the curved display panel's geometric parameters (curvature radius, pixel pitch, diagonal length) and viewing distance, allowing real-time distortion correction without complex runtime calculations. This pre-processing approach enables the system to compensate for curvature-induced distortion proactively rather than reactively.
Solution Approach 2:
The patent implements partial action by applying correction only to the necessary image parameters (luminance and chrominance) rather than processing the entire image data comprehensively. The correction is applied selectively based on the specific distortion characteristics of the curved panel, using simplified correction formulas that focus on the most significant distortion components rather than attempting complete geometric remapping.
Data Source
AI summary
An apparatus for correcting image distortion may correct a luminance level of image data in accordance with a curvature of a curved display panel in a curved display device and a viewing distance of a viewer and display an image optimized for the curvature and the viewing distance on a full area of the curved display panel, whereby an image having no distortion may be provided to the viewer. The apparatus for correcting image distortion includes a virtual curved surface generator, a coordinate mapping unit, and a luminance converter.