Sub-Pixel Light-Blocking Layout for Directional Display Privacy
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Solution Overview
Problem
Conventional display apparatuses in vehicles lack effective mechanisms to limit visibility of displayed content from certain viewing angles, leading to potential distractions and reduced privacy.
Innovation Solution
A display apparatus with strategically arranged sub-pixels and light-blocking lines that control light emission directionally, ensuring visibility is restricted to desired angles by activating odd or even columns of sub-pixels based on privacy mode, using a controller and driving circuits to manage gate signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional display apparatuses are used in vehicles, then display functionality is provided, but visibility control from certain viewing angles is ineffective leading to privacy issues and distractions
Solution Approach 1:
The display apparatus segments the sub-pixels into odd columns and even columns, with light-blocking lines selectively positioned on one side of odd column sub-pixels. This segmentation enables directional visibility control where content is visible from the front but blocked from side viewing angles, resolving the privacy issue while maintaining display functionality
Solution Approach 2:
The patent applies light-blocking lines only to specific locations - one side of sub-pixels in odd columns - rather than uniformly across the entire display. This local application of light-blocking structures provides angle-dependent visibility control without compromising overall display quality or brightness for legitimate viewers
2Adaptability or versatility
If light-blocking lines are added to control visibility angles, then privacy is enhanced, but device complexity increases
Solution Approach 1:
The display structure is segmented into odd and even columns with light-blocking lines applied only to odd columns. This selective segmentation adds complexity only where needed for visibility control while leaving even columns simple, balancing privacy enhancement with structural simplicity
Solution Approach 2:
Instead of making the entire display structure complex with omnidirectional light-blocking, the patent inverts the approach by using simple selective positioning - light-blocking lines on only one side of odd column sub-pixels. This inverted simplicity achieves directional control without requiring complex multi-layer structures across the whole display
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
Enhances privacy and display quality by blocking unwanted light propagation, allowing only designated viewers to see the content, minimizing distractions and maintaining high image quality.
Implementation Method 1
a plurality of light-blocking lines arranged in a first direction on one side of the sub-pixels in each odd column and extending along a second direction intersecting the first direction in a plan view
Data Source
AI summary
A display apparatus includes a plurality of sub-pixels arranged in rows and columns, and a plurality of light-blocking lines arranged in a first direction on one side of sub-pixels arranged in each odd column, and extending along a second direction intersecting the first direction in a plan view, wherein the sub-pixels arranged in the odd column include a plurality of unit pixels each including a first sub-pixel of a first color, a second sub-pixel of a second color, and a third sub-pixel of a third color, and in a cross-sectional view intersecting the second direction, the light-blocking lines corresponding to one of the unit pixels have a same thickness.