Vehicle Display Panel with Segmented Viewing Angle Control
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Solution Overview
Problem
Existing light emitting display apparatuses mounted on vehicle dashboards have fixed viewing angles, leading to discomfort for drivers and passengers, especially when displaying content that may distract the driver and compromise safety.
Innovation Solution
A light emitting display panel and apparatus that utilize subpixels with first and second light emitting units driven by viewing angle control transistors of different polarity types, allowing for selective control of viewing angles and restriction of displayed content to prevent driver distraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed viewing angle is used in the light emitting display apparatus, then the device complexity is reduced, but the adaptability for different users (driver and passenger) deteriorates
Solution Approach 1:
The display area is divided into multiple light emitting areas (first light emitting area and second light emitting area), with each area having independent viewing angle control through separate control transistors. This segmentation allows different viewing angles to be provided for different users simultaneously, resolving the contradiction between adaptability and complexity by managing complexity through modular division.
Solution Approach 2:
The viewing angle of each light emitting area is made dynamically adjustable through control transistors that can switch between different light emitting units (first and second light emitting units) with different viewing characteristics. This dynamic control enables the display to adapt to different usage scenarios, such as providing wide viewing angles for passengers and narrow viewing angles for drivers, without requiring a completely different display structure.
2Ease of operation
If content is displayed with wide viewing angle for passenger convenience, then the passenger experience is improved, but driver safety deteriorates due to potential distraction
Solution Approach 1:
The display is segmented into different light emitting areas that can be independently controlled. The first light emitting area can display content with viewing angles optimized for passenger entertainment, while the second light emitting area displays critical information with viewing angles optimized for driver visibility. This spatial segmentation ensures that distracting content does not interfere with the driver's view of important information.
Solution Approach 2:
Different regions of the display have different optical characteristics tailored to their specific functions. The first light emitting area has optical properties (viewing angle, brightness) optimized for passenger entertainment, while the second light emitting area has optical properties optimized for driver information display. This local differentiation of quality allows simultaneous optimization for both passenger convenience and driver safety.
3Measurement precision
If separate control transistors are added for each light emitting unit, then the viewing angle control precision is improved, but the device complexity increases
Solution Approach 1:
The control circuitry is segmented into separate control transistors for each light emitting unit, allowing independent and precise control of each unit's viewing angle. While this increases the number of transistors, the segmentation enables precise viewing angle control for each functional area, which is essential for achieving the desired performance of providing different viewing experiences for drivers and passengers.
Data Source
AI summary
A light emitting display panel can include a display area including subpixels and a non-display area outside of the display area, in which each of the subpixels includes a first light emitting unit configured to be driven by a first viewing angle control transistor, and a second light emitting unit configured to be driven by a second viewing angle control transistor. Also, a shape of a first lens included in the first light emitting unit is different than a shape of a second lens included in the second light emitting unit, and a polarity type of the first viewing angle control transistor is different than a polarity type of the second viewing angle control transistor.