Display Optical Panel with Phase Retardation to Reduce Reflections
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Solution Overview
Problem
Existing display devices, particularly head-mounted displays, face challenges in providing improved display quality, immersion, and reducing virtual images due to common electrode reflections.
Innovation Solution
A display device design incorporating a display panel with a light-emitting device, a phase retardation layer with reverse wavelength dispersion characteristics, and an absorbing polarizer, along with an optical panel featuring a beam splitter and reflective polarizer, to enhance image immersion and reduce common electrode reflections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional display panel with common electrode is used, then the device structure is simple, but virtual images and reflections are visible reducing display quality
Solution Approach 1:
A phase retardation layer is introduced as an intermediary component between the common electrode and the viewer. This layer has specific optical properties (reverse wavelength dispersion characteristics) that interfere with and eliminate the harmful reflections and virtual images caused by the common electrode, while maintaining the overall simplicity of the display panel structure.
Solution Approach 2:
The patent changes the optical parameters of the display panel by introducing a phase retardation layer with specific retardation values (λ/4 or λ/2) and reverse wavelength dispersion characteristics. This parameter change modifies how light interacts with the common electrode, eliminating harmful reflections without requiring structural redesign of the entire display panel.
2Object-affected harmful factors
If multiple phase retardation layers with different retardation axes are stacked, then display quality and immersion are improved, but device complexity increases
Solution Approach 1:
The phase retardation function is segmented into multiple independent layers, each with a specific retardation axis orientation (e.g., 0°, 45°, 90°). This segmentation allows each layer to perform a specific optical function, and when combined, they achieve superior display quality and immersion effect while maintaining manageable structural complexity.
Solution Approach 2:
The patent uses composite optical structures by stacking multiple phase retardation layers with different optical properties (different retardation axes and thicknesses). This composite approach creates a synergistic effect where the combination of layers produces better optical performance than individual layers alone, improving display quality without excessive complexity increase.
Data Source
AI summary
A display device includes a display panel and an optical panel disposed on the display panel, the display panel includes a light-emitting device part including a light-emitting device, a first phase retardation layer disposed on the light-emitting device part and having reverse wavelength dispersion characteristics, and an absorbing polarizer disposed on the first phase retardation layer, and the optical panel includes a first lens part disposed on the display panel and including a beam splitter and a second lens part disposed on the first lens part and including a reflective polarizer.