Display Panel Wiring Layout to Reduce Light Leakage Reflection
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Solution Overview
Problem
Display devices using polymer-dispersed liquid crystals face issues with light reflection from wiring lines, leading to reduced display quality and aperture area, and existing solutions either cause light leakage or require complex wiring configurations.
Innovation Solution
The display device design includes scanning and signal lines extending in directions different from the light propagation direction, with reduced reflection by minimizing direct light-shielding layers, thus maintaining aperture area and improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a wide light-shielding layer is provided directly above the wiring lines to suppress reflection light leakage, then display quality is improved, but aperture area is reduced
Solution Approach 1:
The patent changes the orientation of wiring lines from perpendicular to light propagation (causing reflection) to parallel with light propagation direction. This dimensional reorientation eliminates direct reflection while maintaining aperture area, as the light travels along the wiring rather than reflecting off them.
Solution Approach 2:
The patent introduces asymmetric positioning where outermost scanning lines and signal lines are deliberately placed in non-display areas rather than symmetrically distributing all wiring. This asymmetric arrangement allows reduced light-shielding layers while maintaining display quality by positioning critical wiring away from light paths.
2Object-affected harmful factors
If wiring lines are formed into curved shapes to reduce light reflection, then light leakage is suppressed, but device complexity increases
Solution Approach 1:
Instead of curving wiring lines in the plane (increasing complexity), the patent resolves light reflection by changing the wiring orientation to parallel with light propagation in the same plane. This simpler one-dimensional alignment change achieves the same light leakage suppression without curved geometries.
Solution Approach 2:
Rather than attempting to reflect light away from the display area using curved paths, the patent inverts the approach by aligning wiring parallel to light propagation, causing light to travel along the wiring without reflection toward the display area. This reverse strategy simplifies the wiring configuration.
3Ease of manufacture
If wiring lines are arranged perpendicular to light propagation direction, then manufacturing is simplified, but light reflection causes display quality deterioration
Solution Approach 1:
The patent modifies the wiring arrangement from perpendicular to parallel with light propagation direction. This simple orientational change maintains manufacturing ease while fundamentally eliminating the light reflection problem that deteriorates display quality.
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 reduces light leakage and maintains aperture area, enhancing display quality without the need for complex wiring shapes, thereby improving overall display performance.
Implementation Method 1
polymer-dispersed liquid crystals that can switch between a scattering state that scatters incident light and a transparent state that transmits incident light
Implementation Method 2
a light emitting module is arranged at an edge of the display panel
Implementation Method 3
Part of the illumination light emitted from the light emitting module may be reflected by wiring lines provided perpendicular to the progressing direction of the light
Data Source
AI summary
According to one embodiment, a display device includes a display panel including a display area, and a plurality of light-emitting units, and the display panel includes scanning lines and signal lines intersecting the scanning lines, and the plurality of light-emitting units are arranged along a first edge extending in a first direction of the display panel in plan view, and each of the scanning lines and signal lines extends in a direction different from the first direction and a second direction perpendicular to the first direction in the display area in plan view.