Touch Panel Light Divergence Member for Fingerprint Recognition
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Solution Overview
Problem
Current fingerprint recognition technologies in touch panels face challenges in accurately recognizing fingerprint patterns due to the limited number of sensors corresponding to each via hole, resulting in low recognition accuracy of adjacent valleys and ridges.
Innovation Solution
A touch panel design incorporating a display unit with via holes and a light divergence member that irradiates reflected light onto a fingerprint recognition sensor, allowing a single via hole to correspond to multiple sensors, thereby enhancing recognition accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single via hole corresponds to only one sensor, then the structure is simple, but the fingerprint recognition accuracy is low
Solution Approach 1:
The patent divides the light path into multiple segments by introducing a light divergence member between the via hole and the sensor. This segmentation allows the light to be diverged into multiple paths, enabling one via hole to correspond to multiple sensors while maintaining structural clarity and functionality.
Solution Approach 2:
The light divergence member acts as an intermediary component between the via hole and the sensor array. It mediates the light path by diverging the light from a single via hole to multiple sensors, thereby improving fingerprint recognition accuracy without directly complicating the sensor-via hole connection structure.
2Quantity of substance
If sensor size and spacing are kept constant, then manufacturing is easier, but the number of sensors corresponding to each via hole is limited
Solution Approach 1:
The patent utilizes the spatial dimension by positioning the light divergence member at a specific distance from the via hole. This dimensional arrangement allows the diverged light to cover multiple sensors in the lateral direction, increasing the number of sensors per via hole without changing sensor size or spacing, thus avoiding manufacturing complexity.
3Measurement precision
If multiple sensors correspond to each via hole, then fingerprint detail detection improves, but the device structure becomes more complex
Solution Approach 1:
The light divergence member is strategically positioned only at specific locations where via holes are present, rather than throughout the entire device. This localized approach enables multiple sensors to correspond to each via hole for improved fingerprint detail detection, while limiting the added structural complexity to only the necessary regions.
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 design enables more accurate fingerprint recognition by increasing the number of sensors corresponding to each via hole, improving the detection of fingerprint details with constant sensor sizes and spacing, thus enhancing the overall recognition accuracy.
Implementation Method 1
a light divergence member disposed on one side of each via hole which is close to the fingerprint recognition sensor, wherein the light divergence member is configured to irradiate reflected light obtained as light emitted by the pixel units is reflected by a touch body onto the fingerprint recognition sensor
Implementation Method 2
reflected light obtained as light emitted by the pixel units is reflected by a touch body
Data Source
AI summary
The embodiments of the present disclosure disclose a touch panel and a display apparatus. The touch panel includes a display unit comprising a plurality of pixel units; and a fingerprint recognition sensor disposed on one side of the display unit which is opposite to a light emitting surface of the display unit, wherein the display unit further comprises at least one via hole disposed between two adjacent pixel units, and a light divergence member disposed on one side of each via hole which is close to the fingerprint recognition sensor. The light divergence member is configured to irradiate reflected light obtained as light emitted by the pixel units is reflected by a touch body onto the fingerprint recognition sensor.