Display Panel Light-Guiding Structures for Low-Power Anti-Peeping
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Solution Overview
Problem
Current active anti-peeping solutions for display products increase power consumption and limit the use environment due to the need for the user facing the screen to see the content clearly.
Innovation Solution
A display panel design with first and second light-emitting devices of different angles and light-guiding structures, allowing for an anti-peeping mode and a sharing mode, where the first device emits light only in the front viewing direction and the second device emits light at larger angles, utilizing light-blocking and light-guiding structures to reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If anti-peeping film is applied to meet privacy needs, then privacy protection is improved, but the use environment is limited because only the user facing the screen can clearly see the content
Solution Approach 1:
The patent implements dynamic control of light emission angles by switching between first light-emitting devices (narrow angle) and second light-emitting devices (wide angle) based on usage scenarios. This allows the display to adapt between anti-peeping mode and sharing mode, resolving the contradiction between privacy protection and use environment versatility.
2Object-affected harmful factors
If active anti-peeping solution is implemented, then anti-peeping effect is improved, but power consumption increases
Solution Approach 1:
The patent segments the light-emitting function into two distinct systems: first light-emitting devices for anti-peeping mode with narrow emission angles, and second light-emitting devices for sharing mode with wide emission angles. This segmentation allows selective activation based on usage needs, reducing overall power consumption while maintaining effective anti-peeping functionality when required.
Solution Approach 2:
The patent applies different light emission characteristics to different regions: first light-emitting devices emit light in a narrow angle range for privacy protection, while second light-emitting devices emit light in a wide angle range for sharing. This local differentiation optimizes power consumption by matching light emission properties to specific functional requirements.
3Adaptability or versatility
If light-emitting devices emit light at larger angles for sharing mode, then adaptability is improved, but anti-peeping effect deteriorates
Solution Approach 1:
The system dynamically switches between narrow-angle first light-emitting devices for anti-peeping mode and wide-angle second light-emitting devices for sharing mode. This dynamic adjustment allows the display to achieve both anti-peeping effect and sharing capability at different times, resolving the contradiction between these two opposing requirements.
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 solution achieves an active anti-peeping effect while reducing power consumption by optimizing light emission angles and distribution, enhancing brightness and reducing power usage in both modes.
Implementation Method 1
a light-blocking structure located on a side of the display layer away from the substrate
Implementation Method 2
light-guiding structures located on a side of the display layer away from the substrate
Data Source
AI summary
A display panel includes a substrate, a display layer, a light-blocking structure, and light-guiding structures. The display layer includes a pixel definition layer and light-emitting devices. The pixel definition layer includes a first opening and a second opening. The light-emitting devices include a first light-emitting device and a second light-emitting device. An orthographic projection of at least part of the light-blocking structure on the substrate is located between orthographic projections of two adjacent light-emitting devices on the substrate. Along a first direction parallel to a plane of the substrate, a distance between the light-blocking structure and the first opening is smaller than a distance between the light-blocking structure and the second opening. Along a direction perpendicular to the plane of the substrate, the first light-emitting device at least partially overlaps the light-guiding structures, and/or the second light-emitting device at least partially overlaps the light-guiding structures.