Fingerprint Assembly Light-Shielding Structure for OLED Displays
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Solution Overview
Problem
Current display devices with fingerprint identification functions, particularly those using organic light-emitting display panels, require a separate collimating film which is costly and complicates the assembly process, increasing manufacturing costs and complexity.
Innovation Solution
Integrating a light-shielding structure with light-transmissive and light-shielding portions on a shared substrate with the fingerprint identification unit, eliminating the need for a separate collimating film by positioning the fingerprint identification assembly on the non-light-emitting side of the organic light-emitting display panel, and incorporating a lens array between the light-shielding structure and the display panel to enhance fingerprint signal accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate collimating film is used between the fingerprint identifier and the organic light-emitting display panel, then the quality of fingerprint identification is ensured, but the manufacturing cost increases and the assembly process becomes complicated
Solution Approach 1:
The patent integrates the collimating function directly into the fingerprint identification assembly by incorporating a lens array structure within the assembly housing. This merging of the collimating function with the fingerprint identifier eliminates the need for a separate collimating film, thereby reducing assembly complexity while maintaining fingerprint identification quality through the integrated optical design
Solution Approach 2:
The fingerprint identification assembly is designed to perform multiple functions: fingerprint sensing, light collimation, and optical path management. By making the assembly multi-functional, the patent eliminates the need for separate dedicated components like the collimating film, simplifying the overall device structure and reducing manufacturing costs while ensuring identification quality
2Measurement precision
If a separate collimating film is attached between the fingerprint identifier and the display panel, then light collimation is achieved, but the manufacturing cost increases
Solution Approach 1:
The collimating function is merged into the fingerprint identification assembly through an integrated lens array structure. This consolidation eliminates the need to purchase and assemble a separate expensive collimating film, reducing manufacturing costs while maintaining the necessary light collimation for accurate fingerprint signal detection
Solution Approach 2:
The patent employs a cost-effective lens array structure integrated into the assembly rather than using an expensive separate collimating film. This approach uses more affordable optical components that achieve the same collimation function, thereby reducing overall manufacturing costs while maintaining fingerprint signal accuracy
3Adaptability or versatility
If the fingerprint identification assembly is externally hung under the display panel, then the identification function is added, but the device structure becomes more complex
Solution Approach 1:
The patent merges the fingerprint identification assembly with the display panel structure by integrating it into the existing housing or frame. This integration approach adds the fingerprint identification function without creating a completely separate external module, thereby reducing structural complexity compared to externally hung configurations
Solution Approach 2:
The display panel housing or frame is designed to serve dual purposes: structural support for the display and housing for the fingerprint identification assembly. This multi-functional design eliminates the need for separate dedicated housing structures, simplifying the overall device structure while maintaining identification functionality
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 reduces manufacturing costs and simplifies the process flow by eliminating the need for a separate collimating film, while improving fingerprint identification accuracy through light collimation and reducing crosstalk.
Implementation Method 1
a light-shielding structure, and the fingerprint identification unit and the light-shielding structure are disposed on a same side of the first substrate
Implementation Method 2
incorporating a lens array between the light-shielding structure and the display panel to enhance fingerprint signal accuracy
Data Source
AI summary
Provided are a display device and a manufacturing method thereof. The display device includes an organic light-emitting display panel and a fingerprint identification assembly disposed on a non-light-emitting display side of the organic light-emitting display panel. The fingerprint identification assembly includes a first substrate, a fingerprint identification unit and a light-shielding structure. The fingerprint identification unit and the light-shielding structure are disposed on a same side of the first substrate. The light-shielding structure is disposed between the fingerprint identification unit and the organic light-emitting display panel; the light-shielding structure includes at least two light-shielding layers, each light-shielding layer includes light-transmissive portions and at least one light-shielding portion, and the light-transmissive portions are at least partially surrounded by the light-shielding portion; in a direction perpendicular to the first substrate, positions of light-transmissive portions in one light-shielding layer are in one-to-one correspondence with positions of light-transmissive portions in another one light-shielding layer.