Display Panel Sensor Pixels for Fingerprint Recognition
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Solution Overview
Problem
The existing design of fingerprint sensors in smartphones restricts screen size expansion and increases manufacturing costs due to the need for a separate fingerprint sensor module, which complicates the assembly process and reduces yield.
Innovation Solution
A display device with sensor pixels embedded in the display panel, allowing for simultaneous scanning and fingerprint recognition without a separate fingerprint sensor module, enabling full-screen displays and reducing manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate fingerprint sensor module is disposed below the screen, then fingerprint recognition function is achieved, but device thickness is increased and manufacturing complexity is increased
Solution Approach 1:
The patent merges the fingerprint sensor pixels with the display panel pixels, integrating both functions into a single unified structure. The sensor pixels are embedded within the display panel itself, eliminating the need for a separate fingerprint sensor module and its associated assembly processes.
Solution Approach 2:
The display panel is designed to serve multiple functions: it acts as both the display component and the fingerprint sensing component. By incorporating sensor pixels that can detect fingerprint patterns while maintaining display functionality, the panel becomes a multi-functional element that reduces overall device complexity.
2Adaptability or versatility
If a separate fingerprint sensor module is disposed below the screen, then fingerprint recognition function is achieved, but manufacturing cost is increased due to additional assembly processes
Solution Approach 1:
The patent merges the fingerprint sensor pixels with the display panel pixels, integrating both functions into a single unified structure. The sensor pixels are embedded within the display panel itself, eliminating the need for a separate fingerprint sensor module and its associated assembly processes.
3Area of stationary object
If sensor pixels are embedded in the display panel, then full-screen display is achieved without increasing thickness, but exposure time control for sensor pixels becomes critical
Solution Approach 1:
The patent implements periodic control of the sensor pixels, where they are activated only during specific time intervals (exposure periods) when fingerprint sensing is required. The pixel controller manages the timing by periodically switching sensor pixels between active sensing mode and inactive display mode, ensuring proper exposure time while maintaining full-screen display capability.
Solution Approach 2:
The patent makes the pixel functionality dynamic by allowing pixels to switch between display mode and sensing mode based on operational requirements. The pixel controller dynamically adjusts the state of each pixel, enabling sensor pixels to be activated for fingerprint sensing when needed and deactivated to maintain normal display function, thereby controlling exposure time precisely.
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 allows for a full-screen display without increasing the device thickness, decreases manufacturing costs, and simplifies the assembly process by integrating fingerprint recognition into the display panel, enhancing user experience and production efficiency.
Implementation Method 1
a plurality of sensor pixels which are exposed to a light during an exposure time to convert the light into an electric current are disposed
Data Source
AI summary
Disclosed herein are a display device and a mobile terminal device including the same, which include a display panel including a screen in which a plurality of display pixels which are sequentially scanned, and a plurality of sensor pixels which are exposed to a light during an exposure time to convert the light into an electric current are disposed. While the display pixels disposed in the first area of the screen are scanned, the sensor pixels are exposed. While the display pixels in the second area of the screen are scanned, sensor data is output from the sensor pixels and then the sensor pixels are initialized.