Dual-Light-Emitter Display Panel for Local Viewing-Angle Control
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Solution Overview
Problem
Existing display apparatuses struggle to selectively control the viewing angle for different areas, particularly in vehicle dashboards, to provide information or content to both the driver and passenger based on the driving situation.
Innovation Solution
A display panel with subpixels that include first and second light-emitting elements, each controlled by separate mode control transistors, and lenses that adjust the viewing angle, allowing independent control of the viewing angle in different areas through multiplexer circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single viewing angle control is used for the entire display, then the structure is simple, but the driver and passenger cannot independently control their viewing angles
Solution Approach 1:
The display is divided into multiple pixel blocks, where each pixel block can be independently controlled by separate multiplexer circuits. This segmentation allows different regions of the display to have different viewing angle characteristics, enabling independent control for driver and passenger areas while maintaining manageable circuit complexity through modular architecture.
Solution Approach 2:
The multiplexer circuits are designed to handle multiple functions: they can selectively activate first light-emitting elements for wide viewing angle mode or second light-emitting elements for narrow viewing angle mode. This multi-functionality allows a single control system to serve both driver and passenger needs without requiring entirely separate control circuits.
2Ease of operation
If wide viewing angle is provided for the passenger area, then the passenger can view content comfortably, but the driver may be distracted
Solution Approach 1:
Different pixel blocks are assigned different viewing angle characteristics based on their location and intended use. Passenger area pixel blocks use first light-emitting elements with wide viewing angles for comfortable viewing, while driver area pixel blocks use second light-emitting elements with narrow viewing angles to prevent distraction. This local differentiation resolves the contradiction by applying appropriate viewing angle properties to specific regions.
Solution Approach 2:
The display system can dynamically switch between wide and narrow viewing angle modes in different pixel blocks based on driving situations. The multiplexer circuits receive control signals that activate appropriate light-emitting elements, allowing the viewing angle characteristics to adapt to changing conditions while maintaining safety and usability.
3Object-affected harmful factors
If narrow viewing angle is used for the driver area, then driver distraction is prevented, but the passenger cannot view content comfortably
Solution Approach 1:
The display employs spatially differentiated viewing angle characteristics where driver-facing pixel blocks use second light-emitting elements with narrow viewing angles to prevent distraction, while passenger-facing pixel blocks use first light-emitting elements with wide viewing angles for comfortable viewing. This local quality approach allows each user to receive appropriate viewing characteristics without compromising the other.
4Adaptability or versatility
If multiple light-emitting elements are added to each subpixel, then independent viewing angle control is achieved, but the manufacturing complexity increases
Solution Approach 1:
Each subpixel is segmented into first and second light-emitting elements with distinct functions. This segmentation enables independent control of viewing angles while using standard manufacturing processes for fabricating multiple light-emitting elements per subpixel, making the increased complexity manageable through established fabrication techniques.
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
Enables flexible adjustment of the viewing angle ratio in display areas, ensuring the driver is not distracted while allowing the passenger to view content comfortably, enhancing safety and usability.
Implementation Method 1
a first lens area disposed on the first light-emitting element, and a second lens area disposed on the second light-emitting element, wherein the first lens area and the second lens area are configured to differently control a viewing angle
Data Source
AI summary
Disclosed is a display panel in which a ratio of a plurality of areas capable of independently controlling a viewing angle in a display area may be adjusted. The display panel includes pixel blocks including subpixels and multiplexer circuits disposed in a bezel area and individually connected to the pixel blocks. The multiplexer circuits supplies first and second mode control signals to any one of the pixel blocks. The subpixels include a first light-emitting element connected to a driving transistor through a first mode control transistor controlled by the first mode control signal, a second light-emitting element connected to the driving transistor through a second mode control transistor controlled by the second mode control signal, a first lens area disposed on the first light-emitting element, and a second lens area disposed on the second light-emitting element.