Display Panel With Passive Light-Emitting Devices for Full Screen Design
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Solution Overview
Problem
The increasing screen-to-body ratio in display products is hindered by the need to accommodate front cameras, sensors, and other elements, which complicates the design of a full screen display due to the integration of pixel circuits and metal routing wires in display panels.
Innovation Solution
A display panel with a base substrate featuring a second display region with active light-emitting devices driven by independent pixel circuits and a first display region using passive light-emitting devices without pixel circuits, allowing for higher light transmittance and enabling the arrangement of front cameras and sensors below the first display region for a full screen design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If pixel circuits and metal routing wires are integrated in the display panel to enable full screen design, then the screen-to-body ratio is improved, but the light transmittance and brightness are reduced
Solution Approach 1:
The display panel is divided into two distinct display regions: a first display region using passive light-emitting devices without pixel circuits for high light transmittance, and a second display region using active light-emitting devices with pixel circuits for full screen display functionality. This segmentation allows different areas to serve different purposes, resolving the contradiction between screen-to-body ratio and brightness.
Solution Approach 2:
Different display regions are assigned different qualities and functions: the first display region optimizes for light transmittance and brightness by eliminating pixel circuits, while the second display region optimizes for active display control. This local differentiation allows the overall system to achieve both high screen-to-body ratio and adequate brightness in critical areas.
2Illumination intensity
If passive light-emitting devices are used in the first display region without pixel circuits, then light transmittance is improved, but the ability to independently control and drive the display region is reduced
Solution Approach 1:
The pixel circuits in the second display region serve multiple functions: they drive both the active light-emitting devices in the second region and the passive light-emitting devices in the first region through shared driving lines. This multi-functionality allows passive devices to benefit from high light transmittance while still maintaining independent driving capability through the universal pixel circuit control.
Solution Approach 2:
Driving lines act as intermediaries that transmit control signals from the pixel circuits to both active and passive light-emitting devices across different display regions. This intermediary mechanism enables the passive light-emitting devices to be controlled without requiring their own dedicated pixel circuits, thus maintaining light transmittance while ensuring driving capability.
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 configuration enhances the screen-to-body ratio by allowing for a full screen design while improving brightness and light transmittance, enabling the integration of front cameras and sensors without compromising display functionality.
Implementation Method 1
a first organic electroluminescence layer, arranged between the first anode and the first cathode and configured to emit the first color light when being electrically excited
Implementation Method 2
a quantum dot layer, arranged between the first organic electroluminescence layer and the second color conversion layer, and configured to convert the first color light to the second color light
Data Source
AI summary
A display panel, driving method and display device, where the display panel includes: a substrate (100) that includes a first display area (A1) and a second display area (A2); a pixel circuit layer positioned in the second display area (A2) of the substrate (100) and including multiple pixel circuits; a light-emitting device layer positioned on one side of the pixel circuit layer that is away from the substrate (100) and including multiple active light-emitting devices (120) and multiple passive light-emitting devices (130), where the multiple active light-emitting devices (120) are arranged in the second display area (A2) and each of the pixel circuits is electrically connected to at least one active light-emitting device (120), and the multiple passive light-emitting devices (130) are arranged in an array in the first display area (A1).