Foldable Display Panel with Integrated Photosensitive Devices
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Solution Overview
Problem
The existing foldable screen technologies face challenges with bending performance due to the thickness of the film layer structure, which includes a fingerprint recognition unit and a thickness matching component, leading to a relatively large thickness and potential risks to the display module's flexibility.
Innovation Solution
A display panel design where light-emitting devices and photosensitive devices are integrated on the same substrate, with light-emitting devices in the light-emitting region and photosensitive devices in the non-light-emitting region, eliminating the need for additional thickness matching components and dispensing glue, thereby reducing the overall thickness and improving bending performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fingerprint recognition unit and thickness matching component are added to the display panel, then the fingerprint recognition function is achieved, but the overall thickness increases and bending performance deteriorates
Solution Approach 1:
The patent combines the fingerprint recognition unit with the display panel by integrating the photosensitive devices directly into the non-light-emitting regions of the display panel structure. This merging eliminates the need for separate thickness matching components and reduces overall thickness while maintaining fingerprint recognition functionality.
Solution Approach 2:
The display panel is designed to serve multiple functions simultaneously: display function through light-emitting devices in light-emitting regions, and fingerprint recognition function through photosensitive devices in non-light-emitting regions. This multi-functionality approach eliminates the need for separate dedicated components for each function.
2Reliability
If additional materials such as thickness matching component and dispensing glue are introduced, then the fingerprint recognition unit is secured, but the bending performance and flexibility of the display module are compromised
Solution Approach 1:
The fingerprint recognition unit is merged into the display panel's native structure, with photosensitive devices positioned in the non-light-emitting regions. This integration eliminates the need for additional securing materials like dispensing glue and thickness matching components, thereby maintaining bending performance and flexibility.
3Reliability
If the film layer structure is made thicker to accommodate fingerprint recognition components, then the components are properly positioned, but the flexibility and bendability of the foldable screen are reduced
Solution Approach 1:
The patent merges the fingerprint recognition components directly into the display panel's film layer structure, positioning photosensitive devices within the non-light-emitting regions of the same film layer. This approach achieves proper component positioning without increasing overall thickness, thereby preserving flexibility.
Solution Approach 2:
The patent utilizes the planar dimension of the display panel by positioning photosensitive devices in the non-light-emitting regions alongside light-emitting devices, rather than stacking them in the thickness dimension. This dimensional arrangement maintains thinness while achieving proper component positioning.
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
This integration enhances the bending performance of the display panel by reducing thickness and eliminating the risks associated with additional materials, while maintaining both display and fingerprint recognition functions.
Implementation Method 1
light-emitting devices on a side of the substrate
Implementation Method 2
photosensitive devices on the side of the substrate same as the light-emitting devices
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a substrate; light-emitting devices on a side of the substrate; photosensitive devices on the side of the substrate same as the light-emitting devices; and touch electrodes on a side of the photosensitive devices away from the substrate. The display panel includes a light-emitting region and a non-light-emitting region. The light-emitting devices correspond to the light-emitting region; and the photosensitive devices are disposed in the non-light-emitting region.