Display Panel Slit Light Modulation for Leakage Suppression
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Solution Overview
Problem
Light leakage occurs at slits in touch function layers of display panels due to large-viewing-angle light emission, leading to visible etching patterns and poor display effect.
Innovation Solution
A light modulation assembly comprising two film layers with different refractive indices is introduced in the slit region, causing total reflection of light to prevent leakage and improve display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a slit is arranged on a touch trace in the touch function layer, then the touch function can be implemented, but light leakage occurs at the slit position when large-viewing-angle light is emitted, resulting in visible etching patterns and poor display effect
Solution Approach 1:
The patent introduces a light modulation assembly as an intermediary component positioned at the slit location. This assembly includes a first film layer and a second film layer with different refractive indices, where the first film layer has higher refractive index. The light modulation assembly acts as a mediator that selectively modulates light passing through the slit, causing total internal reflection for large-viewing-angle light to prevent light leakage, while maintaining touch functionality through the slit structure.
Solution Approach 2:
The patent utilizes parameter changes in the refractive index to control light behavior. By designing the first film layer with a higher refractive index than the second film layer, the system creates conditions for total internal reflection when light encounters the interface between these layers at certain angles. This parameter difference enables the light modulation assembly to differentiate between normal viewing angle light and large-viewing-angle light, blocking the latter while allowing the former to pass through.
2Length of stationary object
If a touch function layer with slits is arranged inside the display panel, then the overall thickness can be reduced, but light leakage at slit positions creates visible etching patterns that affect display quality
Solution Approach 1:
The patent applies local quality by implementing the light modulation assembly specifically at the slit locations rather than uniformly across the entire display panel. The first film layer and second film layer are positioned only where needed - at the touch trace slit regions - to provide local light modulation. This localized approach prevents light leakage at critical slit positions while maintaining the overall thin profile of the display panel and avoiding unnecessary complexity in non-slit areas.
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
The solution effectively prevents light leakage at slits, enhancing the display effect by ensuring uniform light distribution and reducing visible patterns, thus improving user experience.
Implementation Method 1
total reflection can occur at an interface of the first film layer and the second film layer, and the light may not be refracted out from the interface
Data Source
AI summary
Provided are a display panel and a display device, relating to the field of display technologies. The light modulation assembly is arranged in the region of the slit and includes the first film layer and the second film layer that are stacked in the first direction, and a refractive index of the first film layer is greater than a refractive index of the second film layer. After the large-viewing-angle light emitted by the light-emitting element in the display panel enters the light modulation assembly, total reflection can occur at an interface of the first film layer and the second film layer, and the light may not be refracted out from the interface, so that no light leakage can occur at the slit, thereby improving etching patterns and improving the display effect of the display panel.