Display Panel Luminance Control for Biometric Sensing
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Solution Overview
Problem
Current display devices face challenges in improving the sensing performance for fingerprint and blood pressure recognition, particularly in adjusting luminance levels to enhance detection accuracy and efficiency.
Innovation Solution
A display device with a controller that adjusts the luminance of pixels between fingerprint sensing and blood pressure sensing modes, using a panel driving circuit and readout circuit to optimize sensing signals, and includes sensors with specific transistor configurations for accurate biometric data collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the luminance of pixels is increased to enhance blood pressure sensing performance, then the sensing accuracy is improved, but the power consumption increases
Solution Approach 1:
The patent applies dynamics by making the luminance level adjustable based on the sensing mode. The controller dynamically switches between first luminance level (for fingerprint sensing) and second luminance level (for blood pressure sensing), optimizing performance for each specific application while managing power consumption appropriately.
Solution Approach 2:
The patent changes the luminance parameter according to the sensing mode. By setting different luminance levels (first luminance level for fingerprint, second luminance level for blood pressure), the system optimizes the optical conditions for each type of sensing, thereby improving measurement precision without continuously consuming high power.
2Measurement precision
If the luminance of pixels is increased to enhance fingerprint sensing performance, then the sensing accuracy is improved, but the power consumption increases
Solution Approach 1:
The system dynamically adjusts luminance based on the active sensing mode. When fingerprint sensing is required, the controller sets the luminance to the first luminance level; when blood pressure sensing is required, it switches to the second luminance level. This dynamic adjustment ensures optimal sensing accuracy while avoiding unnecessary power consumption.
Solution Approach 2:
The luminance parameter is changed according to the sensing mode requirements. The controller selectively applies the first luminance level for fingerprint sensing and the second luminance level for blood pressure sensing, optimizing the optical conditions for each sensing type while managing power consumption efficiently.
3Measurement precision
If separate luminance levels are used for different sensing modes, then the sensing performance for each mode is optimized, but the device complexity increases
Solution Approach 1:
The display device serves multiple functions by implementing both fingerprint sensing and blood pressure sensing capabilities within the same pixel structure. The controller manages different luminance levels for different sensing modes, allowing a single device to perform multiple sensing functions without requiring separate hardware systems.
Solution Approach 2:
The controller manages parameter changes by switching between different luminance levels based on the sensing mode. This approach allows the system to optimize performance for each sensing type (fingerprint or blood pressure) while using a unified control mechanism, thereby managing complexity through software/control logic rather than hardware multiplication.
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
The solution enhances the accuracy and efficiency of biometric data collection by adjusting luminance levels based on sensing modes, improving fingerprint authentication and blood pressure measurement performance while reducing power consumption.
Implementation Method 1
an optical scheme that detects incident light by using an optical sensor
Implementation Method 2
a plurality of pixels, each of the plurality of pixels including a light emitting element
Data Source
AI summary
A display device includes: a display panel including: a plurality of pixels, each including a light emitting element; and a plurality of sensors, each including a light sensing element; a panel driving circuit to drive the plurality of pixels; a readout circuit to receive a sensing signal from the plurality of sensors; and a controller to control the panel driving circuit and the readout circuit. The controller is to: control the panel driving circuit to set a luminance of pixels in an emission area from among the plurality of pixels to a first luminance level in a fingerprint sensing mode; and control the panel driving circuit to set the luminance of the pixels in the emission area to a second luminance level in a blood pressure sensing mode, and the second luminance level is higher than the first luminance level.