Tiled Display Seam Masking via Adaptive Luminance Compensation
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Solution Overview
Problem
Large-sized display devices experience increased defective rates of light emitting elements due to the higher number of pixels, leading to decreased productivity and reliability. Tiled display devices attempt to address this by connecting multiple smaller display devices, but the seams between them create a sense of discontinuity, reducing image immersion.
Innovation Solution
A tiled display device that includes a first and second display device, each with a display area and a non-display area, a coupling area between them, a viewing distance detector, and a luminance compensator. The luminance compensator adjusts the luminance of pixels adjacent to the coupling area based on the size of the coupling area and the viewing distance to prevent recognition of the seams and enhance image immersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple display devices are connected to form a large-sized display, then the display area size is increased, but boundary portions (seams) appear between the devices creating a sense of discontinuity
Solution Approach 1:
The patent applies local quality by differentiating the luminance characteristics of pixels based on their spatial location. Specifically, pixels adjacent to the coupling area (seam region) are assigned different luminance compensation values compared to pixels in the center of display devices. This creates locally optimized luminance distribution that masks the seam boundary, making the transition between adjacent display devices less noticeable and reducing the sense of discontinuity.
Solution Approach 2:
The patent employs parameter changes by dynamically adjusting the luminance compensation amount based on the coupling pitch and pixel pitch. The luminance compensator calculates a visibility index that depends on the ratio of coupling pitch to pixel pitch, and modifies the luminance of adjacent pixels accordingly. This parameter adjustment optimizes the visual blending at seams for different display configurations and viewing conditions.
2Measurement precision
If the number of pixels is increased to achieve large display size, then the display resolution is improved, but the defective rate of light emitting elements increases
Solution Approach 1:
The patent applies segmentation by dividing the large display into multiple smaller display devices connected together. Each display device contains a manageable number of pixels, reducing the probability of defects within each individual device. The segmentation strategy allows for improved reliability while maintaining high overall resolution through the combined output of multiple devices.
Solution Approach 2:
The patent introduces an intermediary approach by using coupling areas with specific luminance compensation to bridge adjacent display devices. The luminance compensator acts as an intermediary that adjusts the output of boundary pixels to create seamless transitions, effectively hiding the boundaries between segmented display devices and creating a visually continuous large display.
3Object-affected harmful factors
If luminance compensation is applied to pixels adjacent to the coupling area, then the visibility index is optimized and seam recognition is reduced, but the device complexity increases
Solution Approach 1:
The patent applies self-service by implementing an automated luminance compensation system that operates without manual intervention. The luminance compensator automatically calculates the visibility index based on coupling pitch and pixel pitch, and independently determines the appropriate luminance compensation values. The system self-adjusts the luminance of boundary pixels to optimize seam visibility, reducing the need for external configuration or manual tuning.
Data Source
AI summary
A tiled display device comprises a first display device and a second display device, each including a display area including pixels and a non-display area adjacent to the display area, a coupling area disposed between the first display device and the second display device, a viewing distance detector detecting a viewing distance between the tiled display device and a user, and a luminance compensator compensating luminance of the pixels adjacent to the coupling area based on a size of the coupling area and the viewing distance.