Display Module Light Emitter Mounting for Fingerprint Sensor Isolation
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Solution Overview
Problem
Existing liquid crystal display modules with integrated fingerprint recognition face challenges in structural complexity and weight due to direct connection of light emitting components to the shell, which complicates manufacturing and may interfere with fingerprint recognition accuracy.
Innovation Solution
A display module design where the first light emitting component is connected to the display panel instead of the shell, with a fingerprint recognition sensor positioned between the shell and display panel, ensuring non-overlapping projections and simplifying the shell's structure, thus reducing manufacturing complexity and weight while maintaining accurate fingerprint recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the light emitting component is directly connected to the shell, then the structural support is strengthened, but the device complexity and weight increase
Solution Approach 1:
The patent introduces the display panel as an intermediary component between the light emitting component and the shell. The light emitting component is connected to the display panel, which in turn is connected to the shell, distributing the structural support function across multiple components rather than concentrating it on the shell alone. This reduces the shell's structural burden and overall device complexity.
Solution Approach 2:
The patent segments the structural support function by connecting the light emitting component to the display panel rather than directly to the shell. This segmentation allows the display panel to share the mechanical load-bearing responsibility, reducing the complexity of the shell structure while maintaining adequate support.
2Ease of manufacture
If the light emitting component is directly connected to the shell, then the assembly is simplified, but the fingerprint recognition accuracy deteriorates due to light interference
Solution Approach 1:
The display panel serves as an intermediary that optically isolates the light emitting component from the fingerprint recognition sensor. By positioning the light emitting component on the display panel rather than the shell, the patent creates an optical path separation that prevents direct light interference with the sensor, thereby maintaining fingerprint recognition accuracy while preserving manufacturing simplicity.
Solution Approach 2:
The patent resolves the light interference problem by changing the spatial dimension of the light emitting component's position. Instead of placing it on the shell (outer dimension), it is positioned on the display panel (inner dimension), creating spatial separation between the light source and the fingerprint sensor, thus eliminating optical interference.
3Measurement precision
If the fingerprint recognition sensor is positioned between the shell and display panel, then the light interference is eliminated, but the device thickness increases
Solution Approach 1:
The patent embeds the fingerprint recognition sensor within the existing layered structure between the shell and display panel, utilizing the available space efficiently. The sensor is integrated into the stack-up without requiring additional external thickness, as it nestles within the existing structural layers.
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 results in a thinner, lighter display module with reduced structural complexity and improved fingerprint recognition accuracy by preventing light interference between the light emitting component and the fingerprint recognition sensor.
Implementation Method 1
a first light emitting component, wherein the first light emitting component is connected to the display panel and is configured to emit light of a target wavelength
Implementation Method 2
the fingerprint recognition sensor is configured to recognize a fingerprint based on received light of the target wavelength reflected by an obstacle
Data Source
AI summary
Provided is a display module, including: a shell; a display panel, wherein the display panel is disposed in the shell and is connected to the shell; a first light emitting component, wherein the first light emitting component is connected to the display panel and is configured to emit light of a target wavelength; and a fingerprint recognition sensor, wherein the fingerprint recognition sensor is disposed between the shell and the display panel and is fixedly connected to the shell; an orthographic projection of the fingerprint recognition sensor onto the display panel and an orthographic projection of the first light emitting component onto the display panel do not overlap; and the fingerprint recognition sensor is configured to recognize a fingerprint based on received light of the target wavelength reflected by an obstacle.