Display Device Dummy Light-Shielding Pattern Suppresses Moire
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Solution Overview
Problem
The existing display device technologies using light control panels for improving contrast suffer from interference between light-shielding patterns on two display panels, leading to moire fringes that degrade display quality.
Innovation Solution
A display device configuration with a liquid crystal display panel and a dimming panel bonded by an adhesive layer, where the dimming panel's light-shielding pattern includes a dummy light-shielding portion overlapping the liquid crystal display panel's pixels, ensuring equal aperture ratios and minimizing parallax differences to suppress moire interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light-shielding patterns are provided on both display panels to control light, then contrast is improved, but moire interference fringes occur due to pattern interference
Solution Approach 1:
The patent applies the copying principle by creating a dummy light-shielding pattern on the dimming panel that replicates the pixel arrangement of the liquid crystal display panel. This dummy pattern copies the pixel layout without serving functional light control purposes, thereby matching the optical characteristics and eliminating moire interference while maintaining the contrast improvement from the light-shielding patterns.
2Manufacturing precision
If light-shielding patterns are designed for precise light control, then display quality is improved, but aperture ratio variations cause moire fringes
Solution Approach 1:
The patent applies homogeneity by ensuring that the dummy light-shielding pattern on the dimming panel has uniform aperture ratio characteristics that match the liquid crystal display panel. This creates homogeneous optical properties across both panels, preventing aperture ratio variations that would otherwise cause moire fringes, while allowing precise light control through the functional light-shielding patterns.
3Stability of the object's composition
If parallax differences between panels are minimized, then display uniformity is improved, but alignment constraints increase
Solution Approach 1:
The patent applies self-service by designing the dummy light-shielding pattern to automatically compensate for parallax differences through its inherent pixel-matching geometry. The pattern's structure self-adjusts to maintain uniformity across viewing angles, reducing the need for complex external alignment mechanisms while ensuring display uniformity without increasing device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively equalizes aperture ratios across pixels, reducing luminance and color moire, thereby enhancing display quality by preventing degradation caused by parallax differences and light-shielding pattern interference.
Implementation Method 1
an adhesive layer, in which the liquid crystal display panel and the dimming panel are bonded to each other
Data Source
AI summary
According to one embodiment, a display device includes a first display panel, a second display panel and an adhesive layer. The first display panel includes a first light-shielding pattern. The first light-shielding pattern extend along first scanning lines and first signal lines. The second display panel includes a second light-shielding pattern. The second light-shielding pattern includes a first light-shielding portion extending along second scanning lines and second signal lines, and a second light-shielding portion overlapping first pixels of the first display panel in planar view.