OLED Display Light-Shielding Layer Separation for Fingerprint Recognition
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Solution Overview
Problem
In the development of OLED display panels, the integration of fingerprint recognition technology poses challenges, particularly with the uneven surface caused by light-shielding layers affecting the crystallization of crystal silicon in thin film transistors, leading to poor uniformity and display effects.
Innovation Solution
A display apparatus with a light-shielding layer and texture recognition structure disposed outside the display panel, featuring through holes for optical texture recognition, which allows for separate manufacturing processes and reduces interaction with the display panel, thereby maintaining uniformity and improving display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the light-shielding layer is disposed on the display panel to enable fingerprint recognition, then the fingerprint recognition function is achieved, but the uneven surface of the light-shielding layer affects the crystallization of crystal silicon in thin film transistors, leading to poor uniformity and display effects
Solution Approach 1:
The invention divides the system into two independent parts: the display panel and the light-shielding layer with fingerprint recognition structure. By separating these components, the light-shielding layer no longer directly contacts the crystal silicon layer, eliminating the surface unevenness problem while maintaining fingerprint recognition functionality through optical interaction through the substrate.
Solution Approach 2:
The invention moves the light-shielding layer from the same plane as the display panel to a separate dimension (below or above the substrate). This spatial repositioning allows the light-shielding layer to perform its function without physically interfering with the crystal silicon crystallization process, resolving the contradiction between functionality and manufacturing precision.
2Device complexity
If the light-shielding layer is integrated with the display panel, then the structure is compact, but the manufacturing process becomes complex and the display quality is compromised due to interference with crystal silicon crystallization
Solution Approach 1:
The invention segments the integrated structure into separate manufacturing components: the display panel and the light-shielding layer assembly. This segmentation simplifies the manufacturing process for each component while maintaining the compact overall structure, and crucially prevents the light-shielding layer from interfering with crystal silicon crystallization, thereby preserving display quality.
Solution Approach 2:
The substrate acts as an intermediary between the display panel and the light-shielding layer. This intermediary structure allows optical interaction for fingerprint recognition while physically isolating the light-shielding layer from the crystal silicon layer, preventing surface unevenness from affecting crystallization and maintaining display quality.
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 solution enhances the accuracy of fingerprint recognition and texture recognition while preventing the light-shielding layer from affecting the crystallization of crystal silicon, ensuring better uniformity and display quality of the OLED panel.
Implementation Method 1
a light-shielding layer disposed on a side of the display panel opposite to a light-exit side of the display panel
Implementation Method 2
each texture recognition device is configured to collect light reflected by an object to be detected after the light emitted from the display panel being irradiated onto the object to be detected, so as to recognize a texture of the object
Data Source
AI summary
A display apparatus has a display region, and the display region includes a texture recognition region. The display apparatus includes: a display panel, a light-shielding layer disposed on a side of the display panel opposite to a light-exit side of the display panel, and a texture recognition structure disposed on a side of the light-shielding layer facing away from the display panel. The light-shielding layer includes a plurality of first through holes. The texture recognition structure is located in the texture recognition region. The texture recognition structure includes a plurality of texture recognition devices arranged in one-to-one correspondence with the plurality of first through holes.