Refractive Display Layer for Privacy Viewing Angle Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional privacy protection films for display devices reduce luminance, alter light color, and increase device thickness, while failing to effectively adjust the viewing angle and prevent color combination phenomena.
Innovation Solution
A display device with a refractive layer containing vertically stacked light blocking patterns and filling layers, which block light at angles greater than a target angle, ensuring light passes through at a controlled angle and maintaining display quality by preventing color mixture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a privacy protection film is attached on the window to adjust the viewing angle, then the viewing angle is adjusted, but the luminance is reduced and the light color is changed
Solution Approach 1:
The refractive layer is divided into multiple light blocking patterns (first, second, and third patterns) with different positions and widths, creating segmented light blocking zones that selectively block light at different angles while allowing luminance to be maintained in the central viewing area
Solution Approach 2:
Different regions of the refractive layer have different light blocking properties - the first light blocking pattern has a first width, the second pattern has a second width, and the third pattern has a third width, creating local variations in light blocking intensity to achieve angle-specific control without uniformly reducing luminance
2Adaptability or versatility
If a privacy protection film is attached on the window to adjust the viewing angle, then the viewing angle is adjusted, but the thickness of the display device is increased
Solution Approach 1:
The light blocking patterns are integrated directly into the refractive layer structure, merging the privacy protection function with the existing display layers rather than adding a separate privacy film layer, thereby achieving viewing angle adjustment without increasing overall device thickness
Solution Approach 2:
The refractive layer serves multiple functions: it refracts light for display purposes and simultaneously provides privacy protection through the light blocking patterns, eliminating the need for a dedicated privacy film layer
3Adaptability or versatility
If light blocking patterns are used to block light at excessive angles, then the viewing angle is adjusted, but color combination phenomena may occur
Solution Approach 1:
The color filter is positioned to contact specific light blocking patterns (first and second patterns) rather than uniformly covering all areas, creating local color filtering zones that prevent color combination phenomena in critical viewing angles while maintaining display quality in the central emission area
Solution Approach 2:
The color filter acts as an intermediary element between the light blocking patterns and the emitted light, selectively filtering wavelengths to prevent color combination phenomena while allowing the light blocking patterns to perform their primary function of angle control
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 adjusts the viewing angle of the display device without reducing luminance or altering light color, thereby improving display quality by blocking light at excessive angles and preventing color combination issues.
Implementation Method 1
the refractive layer may include a plurality of light blocking patterns which are stacked in a direction perpendicular to a main plane extension direction of the refractive layer... the light blocking patterns may block light
Implementation Method 2
a first refractive index of the first filling layer and a second refractive index of the second filling layer may be greater than one
Data Source
AI summary
A display device includes a display layer disposed on a substrate and divided into an emission area from which light is emitted and a non-emission area adjacent to the emission area, a refractive layer disposed on the display layer and including a first light blocking pattern and a second light blocking pattern disposed on the first light blocking pattern, and a window disposed on the refractive layer.