Light-Transmitting Display Structure for Under-Panel Optical Devices
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Solution Overview
Problem
Existing display devices face challenges in maintaining high light transmittance when an optical device such as a camera or sensor is positioned on the rear surface, leading to reduced display area and impaired optical performance.
Innovation Solution
A light emitting display device design that includes a transparent connecting wire and inorganic insulating films in the light transmitting area, allowing optical devices to be positioned on the rear surface while maintaining image display on the front surface, with a structure that enhances light transmittance and optical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If an optical device is positioned on the rear surface of the display area, then the display area can be increased, but the light transmittance of the light transmitting area is reduced
Solution Approach 1:
The patent applies local quality by making different parts of the display structure have different properties: the light transmitting area uses transparent conductive materials and transparent connecting wires specifically in the region where the optical device is positioned, while other areas use conventional opaque materials. This localized transparency ensures high light transmittance only where needed for optical device performance.
Solution Approach 2:
The patent changes the material parameters of the connecting wires from opaque conductive materials to transparent conductive materials (such as ITO, IZO, or transparent conducting oxides). This parameter change in material transparency allows the connecting wires to transmit light effectively while still providing electrical connection, thus resolving the contradiction between display area expansion and light transmittance maintenance.
2Area of stationary object
If an optical device is positioned on the rear surface of the display area, then the display area can be increased, but the performance of the optical device is impaired
Solution Approach 1:
The patent implements local quality by creating a specialized light transmitting area with enhanced transparency properties where the optical device is positioned. This area uses transparent conductive materials and transparent connecting wires to ensure maximum light transmission, thereby maintaining optical device performance while allowing the overall display area to be expanded.
Solution Approach 2:
The patent employs composite materials including transparent conducting oxides (such as ITO, IZO) combined with transparent insulating films and encapsulation layers. This composite structure provides both electrical functionality and optical transparency, ensuring that the optical device receives sufficient light while the display area is maximized.
3Illumination intensity
If transparent conductive materials are used for connecting wires, then light transmittance is improved, but the complexity of the structure increases
Solution Approach 1:
The patent applies universality by designing transparent connecting wires that perform multiple functions simultaneously: they provide electrical connection between pixel circuits and light emitting elements, serve as transparent electrodes for light transmission, and function as part of the encapsulation structure. This multi-functionality reduces the need for separate components, thereby limiting the increase in structural complexity despite using transparent materials.
Solution Approach 2:
The patent merges the functions of connecting wires and transparent electrodes into a single transparent conductive material layer. By combining these functions, the structure avoids additional separate components that would increase complexity, while still achieving the desired light transmittance improvement through the use of transparent materials.
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 design ensures high light transmittance and improved optical performance by positioning optical devices on the rear surface without reducing the display area, enabling effective image display and enhanced operational capabilities.
Implementation Method 1
a transparent connecting wire that connects the (2-2)-th pixel circuit part and a pixel electrode of the (2-2)-th light emitting element, and is made of a transparent conductive material
Implementation Method 2
at least one organic film in the first pixel circuit part and the (2-1)-th pixel circuit part is not included in the light transmitting area
Data Source
AI summary
A light emitting display device includes: a first display area that includes a first pixel circuit part and a first light emitting element connected to the first pixel circuit part; a (2-1)-th display area that includes a (2-1)-th pixel circuit part, a (2-1)-th light emitting element connected to the (2-1)-th pixel circuit part, and a (2-2)-th pixel circuit part; and a (2-2)-th display area that includes a (2-2)-th light emitting element connected to the (2-2)-th pixel circuit part and a light transmitting area, wherein the first pixel circuit part of the first display area is below the first light emitting element, the (2-1)-th pixel circuit part of the (2-1)-th display area is below the (2-1)-th light emitting element, and at least one organic film in the first pixel circuit part and the (2-1)-th pixel circuit part is not included in the light transmitting area.