Light Emitting Display Device With Independent Viewing Angle Control
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Solution Overview
Problem
Conventional light-emitting display devices lack the ability to selectively control viewing angles, which is desirable for privacy and safety considerations, especially in vehicles where reflections can distract drivers and expose sensitive information to unauthorized viewers.
Innovation Solution
A light-emitting display device with a display panel featuring active areas that can operate independently in private or share viewing modes, utilizing sub-pixels with lenses to control viewing angles and separate emission signal lines for each area, allowing for flexible viewing mode switching and reduced bezel size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a light-emitting display device has a wide viewing angle, then viewing comfort and accessibility are improved, but privacy protection and information security deteriorate
Solution Approach 1:
The display panel is divided into multiple independent active areas (first active area and second active area), each capable of independently controlling its viewing angle. This segmentation allows different regions to have different viewing angle characteristics, enabling one area to provide wide viewing for comfort while another area maintains narrow viewing for privacy protection.
Solution Approach 2:
Different active areas are assigned different optical properties through the use of separate lenses (first lens and second lens) with different refractive characteristics. This allows each local area to have optimized viewing angle properties according to its specific function, with some areas having wider viewing angles and others having narrower angles for privacy.
2Adaptability or versatility
If a light-emitting display device has a wide viewing angle, then accessibility for multiple users is improved, but information security and user-specific content protection deteriorate
Solution Approach 1:
The display is segmented into multiple active areas that can be independently controlled. Each active area can be assigned to different users with different viewing angle requirements, allowing multi-user accessibility while maintaining information security through selective narrow viewing angles for sensitive content areas.
Solution Approach 2:
The viewing angles of different active areas can be dynamically adjusted based on usage scenarios. The system can switch between wide viewing mode for shared content and narrow viewing mode for private information, providing adaptability for different user needs and security requirements.
3Device complexity
If emission signal lines are extended across the entire active area, then signal distribution is simplified, but signal delay increases
Solution Approach 1:
The emission signal lines are segmented to correspond with the segmented active areas. Each active area has its own dedicated emission signal lines that extend only across that specific area rather than the entire display. This reduces the length of signal lines, thereby reducing signal delay while maintaining manageable complexity through localized signal distribution.
4Area of stationary object
If the bezel area is reduced for improved design, then aesthetic appearance and screen-to-body ratio are improved, but the area available for placing driving components deteriorates
Solution Approach 1:
The gate driver and other driving components are moved from the traditional bezel area to the non-active area at the bottom of the display panel. This spatial relocation in another dimension (from the lateral bezel to the bottom edge region) allows for reduced bezel area while still providing adequate space for component placement and manufacturing.
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 selective control of viewing angles in each active area, enhancing privacy and safety by allowing users to switch between private and share viewing modes, reducing signal delay, and minimizing bezel size for improved design and functionality.
Implementation Method 1
a first lens that refracts the light emitted from the first LED
Data Source
AI summary
A light-emitting display device can include a display panel in which an active area including a first active area and a second active area, and a non-active area adjacent to the active area are defined. Also, the light-emitting display device can include a plurality of sub-pixels disposed in the active area, and a gate driver disposed on the non-active area. Each of the plurality of sub-pixels can include a first light-emitting diode (LED) that emits light in response to a driving current and a first lens that refracts the light emitted from the first LED. Also, the light-emitting display device can operate in different modes that have different viewing angles by using the lens to limit or control a viewing angle in each of the first and second active areas and the display panel can selectively change the viewing angle on demand.