OLED Display Light-Emitting Region Brightness Control for Fingerprint Detection
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Solution Overview
Problem
The success rate of fingerprint identification in mobile terminals with under-screen fingerprint modules is low due to the relatively low brightness value of the display screen.
Innovation Solution
An OLED display screen with an optical fingerprint module, where a first light-emitting region emits light at a lower brightness when not touched and increases to a higher brightness when touched, improving fingerprint identification accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the display screen brightness is kept low to save energy, then power consumption is reduced, but the fingerprint identification success rate deteriorates
Solution Approach 1:
The patent implements dynamic brightness adjustment for the first light-emitting region based on touch detection. When a touch is detected, the brightness increases to a second preset value to enable successful fingerprint identification. When no touch is detected, the brightness returns to a first preset value to save energy. This dynamic adjustment resolves the contradiction between power consumption and identification success rate.
Solution Approach 2:
The patent divides the display screen into multiple light-emitting regions, with the first light-emitting region specifically positioned at the fingerprint module area. This region receives enhanced brightness only when needed for fingerprint identification, while other regions maintain normal or lower brightness. This localized quality enhancement resolves the contradiction by applying high brightness only where and when necessary.
2Reliability
If the display screen brightness is increased to improve fingerprint identification accuracy, then the identification success rate improves, but power consumption increases
Solution Approach 1:
The patent employs periodic brightness adjustment triggered by touch events. The brightness of the first light-emitting region is increased only during the brief period when fingerprint identification is needed (when touch is detected), and returns to normal levels afterward. This periodic action ensures high identification success rate during critical moments while minimizing overall power consumption.
Solution Approach 2:
The patent enhances brightness locally at the first light-emitting region corresponding to the fingerprint module, rather than increasing the brightness of the entire display screen. This localized enhancement improves fingerprint identification success rate while limiting the increase in overall power consumption to only the necessary area.
3Area of stationary object
If a traditional fingerprint module is placed below the display screen, then the screen-to-body ratio increases, but the fingerprint identification accuracy deteriorates
Solution Approach 1:
The patent divides the display screen into multiple light-emitting regions, with the first light-emitting region specifically positioned at the fingerprint module area. This region receives enhanced brightness only when needed for fingerprint identification, while other regions maintain normal or lower brightness. This localized quality enhancement resolves the contradiction by applying high brightness only where and when necessary.
Solution Approach 2:
The patent segments the display screen into multiple functional light-emitting regions, separating the fingerprint identification function from the general display function. The first light-emitting region is dedicated to fingerprint identification, while other regions serve general display purposes. This segmentation allows independent optimization of brightness for each function, improving identification accuracy without compromising overall screen performance.
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 fingerprint identification success rate by increasing the brightness of the light-emitting region upon touch, thereby improving the accuracy of skin pattern detection.
Implementation Method 1
The OLED display screen includes a light-emitting layer and a touch screen. The light-emitting layer includes a first light-emitting region and a second light-emitting region.
Implementation Method 2
an optical fingerprint module arranged in the OLED display screen... when skin patterns on the touch screen have been detected by the optical fingerprint module
Data Source
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AI summary
A display screen, a mobile terminal and a display method are provided. The display screen includes an OLED display screen and an optical fingerprint module arranged in the OLED display screen. The OLED display screen includes a light-emitting layer and a touch screen. The light-emitting layer includes a first light-emitting region and a second light-emitting region. The first light-emitting region is arranged at a position corresponding to the optical fingerprint module and configured to, when the region of the touch screen, which corresponds to the first light-emitting region, is not touched, emit light at a first preset brightness value, and when the region of the touch screen, which corresponds to the first light-emitting region, is touched, emit light at a second preset brightness value, the first preset brightness value is smaller than the second preset brightness value.