AMOLED Display Panel With Integrated Light-Sensing Sub-Regions
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Solution Overview
Problem
Current mobile devices lack an effective image scanning function, especially for objects with uneven surfaces, and existing camera-based scanning methods are inadequate for such applications, necessitating a display panel with integrated image scanning capabilities.
Innovation Solution
An active-matrix organic light-emitting diode (AMOLED) display panel is designed with a substrate and transistor layer, featuring subpixel regions that include both display and light-sensitive areas, equipped with organic light-emitting diodes, pixel circuits, and photoresistors to enable both image display and scanning functions by switching between display-driving and light-sensing sub-circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If camera function is used for scanning, then mobile device can perform scanning function, but scanning accuracy for uneven surfaces deteriorates
Solution Approach 1:
The patent merges the display function and scanning function into a single AMOLED display panel. The display panel includes both display sub-regions and light-sensitive sub-regions within the same pixel structure, allowing it to serve as both a display device and an image scanning device simultaneously, eliminating the need for separate camera-based scanning solutions.
Solution Approach 2:
The AMOLED display panel is designed with multi-functionality, capable of operating in both display mode and scanning mode. By incorporating light-sensitive sub-regions with photoresistors alongside display elements, the same hardware component can perform multiple functions: displaying images normally and scanning objects by detecting reflected light, thereby achieving universal applicability.
2Adaptability or versatility
If display panel includes both display and light-sensitive sub-regions, then scanning function is enabled, but device complexity increases
Solution Approach 1:
Each pixel is segmented into distinct functional sub-regions: display sub-regions containing light-emitting elements and light-sensitive sub-regions containing photoresistors. This segmentation allows independent optimization of each function while maintaining a modular structure that can be controlled through separate circuit paths within the same pixel unit.
Solution Approach 2:
The light-sensitive sub-region with photoresistor is nested within the overall pixel structure alongside the display sub-region. The pixel circuit includes nested functional blocks: display-driving sub-circuit for controlling light emission and light-sensing sub-circuit for detecting reflected light, with both circuits sharing the same physical pixel space but operating independently through control signals.
3Measurement precision
If light-sensing sub-circuit is added to pixel circuit, then scanning accuracy improves, but manufacturing complexity increases
Solution Approach 1:
The display sub-regions and light-sensitive sub-regions are fabricated using the same AMOLED manufacturing process and material layers. Both types of sub-regions share common structural elements such as the substrate, transistor layer, and pixel-defining layer, allowing them to be manufactured simultaneously in the same production line without requiring separate fabrication processes.
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 AMOLED display panel effectively scans objects by detecting incident light intensity variations, allowing for the generation of scanned images with improved accuracy and resolution, even on uneven surfaces, while maintaining regular image display capabilities.
Implementation Method 1
a plurality of organic light-emitting diodes formed on the transistor layer respectively on the plurality of subpixel regions
Implementation Method 2
a light-sensing sub-circuit formed on the light-sensitive sub-region and coupled to the display-driving sub-circuit formed on the display sub-region
Data Source
AI summary
The present application discloses a display panel comprising a substrate, a transistor layer on the substrate, and a pixel-defining layer on a side of the transistor layer distal to the substrate to divide the display panel into a plurality of subpixel regions. At least one subpixel region includes a display sub-region and a light-sensitive sub-region. The display panel further includes a plurality of organic light-emitting diodes formed on the transistor layer respectively on the plurality of subpixel regions. Additionally, the display panel includes a plurality of pixel circuits formed in the transistor layer respectively on the plurality of subpixel regions. Each pixel circuit includes at least a display-driving sub-circuit coupled to one organic light-emitting diode. At least one pixel circuit in the at least one subpixel region includes a light-sensing sub-circuit formed on the light-sensitive sub-region and coupled to the display-driving sub-circuit formed on the display sub-region.