Lens Array Valley Light Absorbing Layer for Crosstalk Reduction
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Solution Overview
Problem
Current display devices face challenges in reducing crosstalk and improving image quality, particularly in stereoscopic and viewing angle control displays, due to abnormal light directing phenomena caused by the shape and structure of lens arrays.
Innovation Solution
A lens array with a light transmission characteristic control layer, comprising a light absorbing material and a photocurable resin, is disposed on the valleys of the lenses, with a thickness smaller than the lenses' height, an extinction coefficient in the range of 1.95×10^2 to 1.95×10^3 M−1·cm−1, and a molar concentration of 0.05 to 0.5 M, to absorb and control light transmission effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a lens array is used in display devices to achieve stereoscopic imaging and viewing angle control, then image display capability is improved, but crosstalk and abnormal light directing phenomena occur
Solution Approach 1:
The patent applies local quality by introducing a light transmission characteristic control layer specifically in the valley regions between lenses, where light leakage and crosstalk occur. This localized modification allows the lenses to maintain their optical focusing function while the valley regions control and block stray light, thereby reducing crosstalk without affecting the overall stereoscopic imaging capability.
Solution Approach 2:
The light transmission characteristic control layer acts as an intermediary element positioned between the lenses and the display panel. This intermediate layer selectively controls light transmission in the valley regions, blocking light that would otherwise cause crosstalk while allowing the lenses to continue their primary function of directing light to the viewer's eyes.
2Object-generated harmful factors
If the light transmission characteristic control layer is made thicker to better control light transmission, then crosstalk reduction is improved, but the overall device thickness increases
Solution Approach 1:
The control layer is positioned only in the valley regions between lenses rather than covering the entire lens surface. This localized placement allows for effective light transmission control in the critical areas where crosstalk occurs, while minimizing the overall thickness increase compared to a full-surface coating approach.
Solution Approach 2:
The patent optimizes the thickness parameter of the light transmission characteristic control layer to a specific range (50-200 nm) that provides sufficient light absorption and crosstalk reduction while keeping the overall device thickness minimal. This parameter optimization balances the competing requirements of effective light control and thin device structure.
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 significantly reduces crosstalk and enhances image quality by minimizing abnormal light directing, thereby improving the display's stereoscopic and viewing angle control capabilities.
Implementation Method 1
The light transmission characteristic control layer includes a light absorbing material, and a stacked thickness of the light transmission characteristic control layer is smaller than a height of each of the lenses
Data Source
AI summary
A display device includes a display panel, and a lens array disposed on a surface of the display panel. The lens array includes a plurality of lenses and a light transmission characteristic control layer disposed on a valley of each of the lenses. The light transmission characteristic control layer includes a light absorbing material. A stacked thickness of the light transmission characteristic control layer is smaller than a height of each of the lenses.