Viewing Angle Switchable Display Device for Vehicle Safety
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Solution Overview
Problem
Organic light-emitting diode (OLED) display devices have wide viewing angles, which can obstruct a driver's view when used in vehicles, particularly at night, and there is a need for a solution to dynamically control the viewing angle based on the driver's status and passenger presence.
Innovation Solution
A viewing angle switchable display device is designed with a display panel comprising sub-pixels and a lens layer, where the sub-pixels have different emission areas and lenses that limit the viewing angle, allowing for selective switching between wide and narrow viewing modes by controlling the emission areas and lenses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the viewing angle of OLED display device is kept wide, then the display quality and visibility are improved, but the driver's view is obstructed and safety is reduced
Solution Approach 1:
The patent implements dynamic viewing angle control by switching between a first emission area (first lens) and a second emission area (second lens) based on driving status. When the vehicle is in driving mode, the system limits the viewing angle to prevent glare on the windshield; when in non-driving mode, it expands the viewing angle for better visibility and passenger sharing.
Solution Approach 2:
The display panel is divided into different emission areas with distinct optical characteristics. The first emission area is optimized for wide viewing angles during non-driving conditions, while the second emission area provides controlled viewing angles during driving to minimize windshield reflection and maximize driver safety.
2Reliability
If the viewing angle is limited for privacy and safety, then driver safety and information protection are improved, but display visibility and usability are reduced
Solution Approach 1:
The system dynamically adjusts the emission area based on detected driving status. A sensor detects whether the vehicle is in driving or non-driving mode and automatically switches between the first and second emission areas, ensuring optimal balance between safety and usability without requiring manual user intervention.
Solution Approach 2:
The patent incorporates a feedback mechanism where a sensor detects the driving status and provides information to the controller, which then adjusts the emission area accordingly. This closed-loop control ensures that the display automatically adapts to the current usage scenario, maintaining high usability while ensuring safety.
3Adaptability or versatility
If the viewing angle is dynamically switched between wide and narrow modes, then adaptability and versatility are improved, but device complexity increases
Solution Approach 1:
The display panel is segmented into multiple emission areas, each with its own lens structure optimized for specific viewing conditions. This segmentation allows independent control of different display regions, enabling flexible viewing angle adjustment without requiring complex mechanical moving parts.
Solution Approach 2:
The display device integrates multiple functions into a single system: it serves as both a wide-angle display for passenger entertainment and a controlled-angle display for driver information. The same physical display panel can switch between different operational modes based on driving status, eliminating the need for separate display units.
4Object-generated harmful factors
If the viewing angle is limited to prevent windshield reflection, then harmful factors are reduced, but luminance efficiency and power consumption are affected
Solution Approach 1:
The system dynamically selects the appropriate emission area based on driving status. During driving, the second emission area with controlled viewing angles is activated to minimize windshield reflection. During non-driving conditions, the first emission area provides wide-angle display. This dynamic switching optimizes energy usage by activating only the necessary display region.
Solution Approach 2:
The patent changes the optical parameters of the display by switching between different emission areas with distinct viewing angle characteristics. This parameter change allows the system to optimize both glare reduction and luminance efficiency for different operating conditions without requiring additional light sources or complex optical 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 device effectively reduces glare and obstruction for drivers by dynamically adjusting the viewing angle, enhancing safety and usability in vehicles while maintaining high luminance efficiency and reducing power consumption.
Implementation Method 1
a lens layer over the display panel and including a first lens corresponding to the first emission area and a second lens corresponding to the second emission area
Data Source
AI summary
A viewing angle switchable display device can include a display panel including first, second, and third sub-pixels, each of the first, second, and third sub-pixels having a first emission area and a second emission area spaced apart from the first emission area; and a lens layer disposed over the display panel and including a first type of lens corresponding to the first emission area and a second type of lens corresponding to the second emission area, in which the first type of lens has a different shape than the second type of lens. Also, the display panel is configured to display an image according to a wide view mode via the first emission area and the first type of lens, and display the image according to a narrow view mode via the second emission area and the second type of lens.