Fingerprint Identification Unit Light Transmittance Optimization
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Solution Overview
Problem
Display panels with fingerprint identification functions have low light transmittance due to opaque metal layers, reducing the magnitude of the fingerprint identification signal.
Innovation Solution
The fingerprint identification unit is positioned on the side of the array substrate away from the pixel units, with a smaller non-light transmittance region in the display region compared to the surrounding area, allowing for increased light transmittance and improved fingerprint identification signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If opaque metal layers are used in the display panel, then structural strength and electrical conductivity are improved, but light transmittance is reduced and fingerprint identification signal magnitude is reduced
Solution Approach 1:
The display region is divided into a first region (where fingerprint identification unit is disposed) and a second region (without fingerprint identification unit). In the first region, the area of non-light transmittance region is reduced to allow more light to reach the fingerprint identification unit, while the second region maintains normal opaque metal layer structure for structural strength and electrical conductivity.
Solution Approach 2:
Different regions of the display panel have different light transmittance characteristics. The first region has higher light transmittance (smaller non-light transmittance region area) to benefit fingerprint identification, while the second region maintains lower light transmittance for normal display function. This local differentiation resolves the contradiction between structural strength and light transmittance.
2Reliability
If opaque metal layers are used in the display panel, then electrical conductivity is improved, but fingerprint identification signal magnitude is reduced
Solution Approach 1:
The display panel is segmented into different functional regions: the first region optimized for fingerprint identification with reduced non-light transmittance region area, and the second region for normal display operation. This segmentation allows electrical conductivity to be maintained in the second region while improving light transmittance and signal magnitude in the first region.
Solution Approach 2:
The electrical conductivity requirements are satisfied locally in the second region through normal opaque metal layer structure, while the first region prioritizes light transmittance for fingerprint identification signal strength. This local quality differentiation resolves the contradiction between electrical conductivity and signal magnitude.
3Illumination intensity
If the non-light transmittance region area in the first region is reduced, then light transmittance is improved and fingerprint identification signal magnitude is increased, but display quality in that region may be affected
Solution Approach 1:
The display panel is divided into a first region for fingerprint identification and a second region for normal display. This segmentation isolates the light transmittance optimization to only the first region, preventing any potential display quality issues from affecting the overall display performance, as the second region maintains normal structure.
Solution Approach 2:
Different display quality requirements are met in different regions: the first region prioritizes light transmittance for fingerprint identification with reduced non-light transmittance region, while the second region maintains standard display quality. This local quality approach resolves the contradiction between light transmittance and 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 configuration enhances light transmittance and increases the magnitude of the fingerprint identification signal, improving the effectiveness of fingerprint recognition.
Implementation Method 1
Light emitted by a light source is reflected by a touch body, passes through the array substrate and then is received by the fingerprint identification unit below the array substrate
Data Source
AI summary
Disclosed are a display panel and a display apparatus. The display panel includes: an array substrate and a plurality of pixel units disposed on the array substrate; at least one fingerprint identification unit disposed on the array substrate and configured to perform fingerprint identification according to light reflected by a touch body; and a display region and a non-display region surrounding the display region. The display region includes a first region and a second region. The fingerprint identification units are disposed in the first region. On a side or the fingerprint identification unit facing towards a light emitting surface of the display panel, an area of a non-light transmittance region in per unit area of the first region is smaller than an area of a non-light transmittance region in per unit area of the second region.