Double-Layer Display Panel Frame Visibility at Oblique Angles
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Solution Overview
Problem
Conventional double-layered liquid crystal display devices suffer from brightness reduction around the display at oblique viewing angles due to visible frames of adjacent display panels, affecting user visual quality.
Innovation Solution
A display device design featuring a first panel with a larger working area and a second panel with a smaller overlapping working area, where the width of non-working areas is adjusted to prevent frame visibility at oblique angles by considering viewing angles, refractive indices, and optical film thicknesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a double-layered liquid crystal display device is formed by stacking two display panels, then the contrast and black area depth are improved, but the frames of the display panels become visible at oblique angles causing brightness reduction
Solution Approach 1:
The patent extracts and removes the frame structures from the display panels. By eliminating the frames that cause visibility issues at oblique angles, the invention resolves the contradiction between maintaining image brightness and reducing structural complexity that causes viewing angle problems.
Solution Approach 2:
The patent merges the two display panels into a integrated double-layered structure where the panels are stacked closely together. This merging eliminates the visible frames between panels while maintaining the contrast-enhancing benefits of the double-layered configuration.
2Illumination intensity
If the second working area is made smaller than the first working area with overlapping regions, then the frames are hidden at oblique angles, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by creating different working area sizes for the two panels. The first panel has a larger working area while the second panel has a smaller working area that overlaps with the first. This local differentiation in working area dimensions allows the frames to be hidden at oblique angles while managing manufacturing precision requirements.
3Ease of operation
If the non-working area width is adjusted based on viewing angles and optical properties, then the frame visibility is eliminated, but the design complexity increases
Solution Approach 1:
The patent changes key design parameters including the width of non-working areas, the size of the second working area relative to the first, and the overlapping region dimensions. These parameter adjustments are specifically designed to eliminate frame visibility at oblique angles while optimizing the viewing experience, thereby managing design complexity through systematic parameter optimization.
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 design enhances user viewing experience by maintaining image brightness and contrast across various viewing angles, eliminating the visibility of non-working areas and thus improving visual quality.
Implementation Method 1
the refractive index of the second panel and the refractive index and the thicknesses of the optical films that is disposed between the first panel and the second panel
Data Source
AI summary
A display device, characterized in that the display device includes a first panel, having a first side and a first light shielding layer at a periphery of the first panel, wherein the first light shielding layer has a first edge departing away from the first side; and a second panel, disposed on the first panel, and having a second side adjacent to the first side; wherein the second panel includes a second light shielding layer at a periphery of the second panel; and the second light shielding layer has a second edge departing away from the second side. Wherein a first width is measured from the first side to the first edge along a direction, a second width is measured from the second side to the second edge along the direction, the second width is greater than the first width, and the direction is vertical to the first side.