Vehicle Display Pixel Layout for Switchable Viewing Angles
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Solution Overview
Problem
Display apparatuses used in vehicles require high-quality images while accommodating both driver and passenger viewing needs, necessitating a solution that allows for both a driver viewable and non-viewable mode.
Innovation Solution
A display apparatus design featuring a substrate with main and sub light-emitting diodes, separated by a central separator and surrounded by outer separators, along with a light-blocking layer to control viewing angles, enabling both driver viewable and non-viewable modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a display apparatus is designed to provide high-quality images for both driver and passenger viewing, then image quality and versatility are improved, but device complexity and difficulty of controlling viewing angles increase
Solution Approach 1:
The display apparatus is segmented into multiple sub-pixels (first sub-pixel, second sub-pixel, third sub-pixel, fourth sub-pixel) with different light emission characteristics. Each sub-pixel group is controlled independently to achieve different viewing modes, allowing the display to switch between driver-viewable and passenger-viewable modes without requiring separate display devices.
Solution Approach 2:
Different regions of the display have different light emission properties. The first and second sub-pixels emit light in directions suitable for passenger viewing, while the third and fourth sub-pixels emit light in directions suitable for driver viewing. This local differentiation of light emission quality enables the single display to serve multiple viewing purposes effectively.
2Area of stationary object
If light-emitting diodes are placed close together to reduce device size, then area is reduced, but leakage currents and color mixing increase
Solution Approach 1:
A bank layer is introduced as an intermediary structure between adjacent light-emitting diodes. The bank layer includes a first bank region, second bank region, third bank region, and fourth bank region that physically separate the sub-pixels while maintaining compact arrangement. This intermediary structure prevents direct contact between adjacent LEDs, thereby eliminating leakage currents and color mixing while allowing the display to maintain a small area.
3Reliability
If viewing angle control is implemented to protect driver privacy, then image security is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The display apparatus implements dynamic control of light emission directions through independent control of different sub-pixel groups. The display can switch between different viewing modes (driver viewable mode and passenger viewable mode) by controlling which sub-pixels are activated, providing adaptive privacy protection without requiring complex mechanical adjustment mechanisms.
Solution Approach 2:
The display is divided into multiple independently controllable sub-pixel groups with different light emission directions. This segmentation allows the system to selectively activate specific sub-pixel groups based on the intended viewer, providing privacy control through software-driven selection rather than complex hardware mechanisms, thereby maintaining manufacturing simplicity.
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 prevents leakage currents and color mixing, allowing the display to operate in both modes by controlling light emission directions, ensuring high-quality images are visible only to intended viewers.
Implementation Method 1
a light-blocking layer to control viewing angles, enabling both driver viewable and non-viewable modes
Implementation Method 2
a first main light-emitting diode disposed on the substrate, a first sub light-emitting diode disposed on the substrate to be adjacent to the first main light-emitting diode
Data Source
AI summary
A display apparatus includes a substrate, a first main light-emitting diode disposed on the substrate, a first sub light-emitting diode disposed on the substrate to be adjacent to the first main light-emitting diode, where the first sub light-emitting diode emits light of a same color as a color of light of the first main light-emitting diode, a bank layer defining a first main opening exposing the first main light-emitting diode and a first sub-opening exposing the first sub light-emitting diode, and a first central separator disposed on an upper surface of the bank layer, where when viewed in a direction perpendicular to the substrate, the first central separator is disposed between the first main opening and the first sub-opening.