Dual-Lens Subpixel Display for Selective Viewing Angle Control
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Solution Overview
Problem
Existing display devices struggle to selectively control viewing angles and suppress high-angle light leaks, which can lead to safety issues, such as distracting content being shared with vehicle drivers.
Innovation Solution
A display device with a substrate featuring multiple subpixels, each containing a first and second light-emitting element. The first light-emitting element is paired with a first lens providing a specific viewing angle, while the second light-emitting element is paired with multiple second lenses that provide a lower viewing angle. The second light-emitting element's reflective layer includes an opening portion over the area between the second lenses, minimizing light reflection and leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single viewing angle is provided for all light-emitting elements, then the device structure is simple, but the viewing angle cannot be selectively controlled for different content types
Solution Approach 1:
The display device divides the light-emitting elements into two groups: first light-emitting elements paired with first lenses for wide viewing angles, and second light-emitting elements paired with second lenses for narrow viewing angles. This segmentation allows selective viewing angle control for different content types (passenger entertainment vs. driver information) without requiring a completely complex adjustable lens system for all elements.
Solution Approach 2:
The patent implements dynamic viewing angle control by selectively activating either the first light-emitting elements or the second light-emitting elements based on the type of content being displayed. The system can switch between wide-angle and narrow-angle modes, providing adaptability for different usage scenarios while maintaining a relatively simple fixed lens structure for each type.
2Reliability
If light-emitting elements are disposed without openings in reflective layers, then the manufacturing process is simple, but high-angle light leaks occur
Solution Approach 1:
The patent extracts or removes portions of the reflective layer to create opening portions in the second light-emitting elements. These openings are strategically positioned to block high-angle light leaks that would otherwise occur at the edges of the light-emitting elements. While this adds a step to the manufacturing process, it significantly improves light leak suppression and display reliability.
Solution Approach 2:
The reflective layer is modified locally only where needed - specifically in the second light-emitting elements where high-angle light leaks are problematic. The opening portions are created only in specific regions of the reflective layer, maintaining the reflective properties in areas where they are needed while eliminating light leaks in critical areas. This localized modification balances manufacturing complexity with performance improvement.
3Ease of operation
If content is displayed with wide viewing angles, then passenger entertainment is improved, but distracting content may be shared with drivers
Solution Approach 1:
The display device segments the display area into different viewing angle zones using different light-emitting elements and lenses. When entertainment content is displayed for passengers, the system activates the first light-emitting elements with first lenses providing wide viewing angles. When driver-relevant information needs to be displayed, the system switches to the second light-emitting elements with second lenses providing narrow viewing angles that are visible only to the driver, preventing distraction to other road users.
Solution Approach 2:
The patent implements dynamic switching between different viewing angle modes based on the type of content being displayed. The system can adaptively change the viewing angle characteristics in real-time, providing wide angles for passenger entertainment content and narrow angles for driver information content, thereby preventing driver distraction while maintaining ease of operation for different user groups.
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 display device can selectively control viewing angles, suppress high-angle light leaks, improve reliability by minimizing distortion, and enhance user safety by preventing distracting content from being shared with drivers.
Implementation Method 1
anode including a reflective layer, and in which an opening portion is disposed in the reflective layer
Data Source
AI summary
A display device in one example can include a substrate on which a plurality of pixels are disposed, where each pixel includes a plurality of subpixels configured to display different colors. The display device further includes a first light-emitting element and a second light-emitting element disposed in each of the plurality of subpixels, a first lens disposed to overlap a light-emitting area of the first light-emitting element and configured to provide a viewing angle of a first value, and a plurality of second lenses disposed to overlap the light-emitting areas of the second light-emitting elements and configured to provide a viewing angle of a second value lower than the viewing angle of the first value. Each of the first light-emitting element and the second light-emitting element includes an anode.