Display Lens Structure for Narrow Viewing Angle and Moiré Reduction
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Solution Overview
Problem
Display apparatuses face issues with narrow viewing angle realization and moire phenomenon due to light-blocking patterns, which degrade image quality and frontal luminance.
Innovation Solution
A display apparatus design featuring a device substrate with a bank insulating layer, light-emitting device, encapsulating element, touch structure, optical element, and color filter, which includes a lens to control light direction and prevent moire patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light-blocking pattern is used to restrict light travelling direction for narrow viewing angle, then viewing angle is reduced for privacy, but moire phenomenon occurs and image quality decreases
Solution Approach 1:
The patent introduces a touch structure as an intermediary element between the light-emitting device and the light-blocking pattern. This touch structure includes transparent conductive layers and buffer layers that mediate the interaction between light and the blocking pattern, preventing direct contact that causes moire while maintaining the light-restriction function for privacy.
Solution Approach 2:
The light-blocking function is segmented into multiple layers: the touch structure layers (buffer layer, transparent conductive layers) and the separate light-blocking pattern layer. This segmentation allows each layer to perform its specific function independently, reducing the interference that causes moire phenomenon while maintaining overall light control.
2Object-affected harmful factors
If a light-blocking pattern is used to achieve narrow viewing angle, then privacy is improved, but frontal luminance decreases
Solution Approach 1:
The patent optimizes the parameters of the touch structure layers, including the thickness and refractive index of the buffer layer and transparent conductive layers. By adjusting these parameters, the structure minimizes light loss while maintaining the viewing angle restriction, thereby preserving frontal luminance despite the presence of light-blocking patterns.
Solution Approach 2:
The touch structure acts as an intermediary that reduces the negative impact of light-blocking patterns on frontal luminance. The transparent conductive layers and buffer layers facilitate light transmission in the frontal direction while still allowing the light-blocking pattern to restrict viewing angles, thus maintaining brightness for the front user.
3Object-generated harmful factors
If touch structure is added to prevent moire phenomenon, then image quality is improved, but device complexity increases
Solution Approach 1:
The touch structure is designed to serve multiple functions simultaneously: it prevents moire phenomenon, maintains touch sensitivity, provides electrical connectivity through transparent conductive layers, and protects the underlying layers. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
Solution Approach 2:
The patent combines the touch-sensitive function with the moire-prevention function in a single integrated touch structure. The transparent conductive layers and buffer layers serve both as touch interface elements and as optical elements that prevent moire, merging multiple functions into one structure rather than requiring separate components.
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 design effectively realizes a narrow viewing angle while improving frontal luminance and preventing moire phenomena, enhancing image quality and privacy.
Implementation Method 1
The optical element includes a first lens that overlaps the first emission region of the device substrate
Data Source
AI summary
A display apparatus realizing a narrow viewing angle is provided. The display apparatus may include a light-emitting device on an emission region of a device substrate. A touch structure and a lens may be disposed on an encapsulating element covering the light-emitting device. The lens may be disposed on the emission region. A color filter may be disposed on the touch structure and the lens. Thus, in the display apparatus, Moire phenomenon may be prevented or at least reduced.