Partial Transparent EL Display Layout for Sensor-Through Viewing
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Solution Overview
Problem
There is a demand for a transparent display device that maximizes the display area while accommodating components like cameras or optical sensors, which requires a structure that combines both transparency and display functionality without the need for a separate backlight, offering improved flexibility and reduced thickness.
Innovation Solution
A partial transparent electroluminescence (EL) display device is designed with a substrate that includes a transparent emission area for light transmission and a driving emission area for display, featuring transparent and driving emission pixels, and a pad part for signal supply, allowing for increased display area utilization and integration of components like cameras or sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a separate backlight is used to achieve display function, then display visibility is improved, but device thickness and weight increase
Solution Approach 1:
The patent merges the backlight function and display function into a single integrated structure. The light emitting layer serves dual purposes: it provides backlight illumination and simultaneously displays images through pixel-level control, eliminating the need for a separate backlight unit and reducing overall device thickness
Solution Approach 2:
The light emitting layer is designed to perform multiple functions: it acts as both the backlight source and the display medium. By controlling the emission of individual pixels within the light emitting layer, the system achieves both illumination and image display functions using the same structural component
2Adaptability or versatility
If camera or optical sensor is disposed in bezel area, then component integration is achieved, but display area ratio decreases
Solution Approach 1:
The patent moves camera and optical sensor components from the traditional bezel area (one-dimensional boundary) into the display area itself, utilizing the two-dimensional pixel matrix space. This allows components to be integrated within the display region without reducing the overall display area ratio, as the display can selectively activate pixels around the embedded components
3Quantity of substance
If transparent emission area without scan lines and data lines is used, then transparency is improved, but manufacturing complexity increases
Solution Approach 1:
The patent segments the display area into transparent emission areas and non-transparent emission areas. The transparent emission area excludes scan lines and data lines to maximize transparency, while the non-transparent area contains the necessary driving structures. This segmentation allows the system to achieve high transparency in specific regions without requiring complete redesign of the entire manufacturing process
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 enables a higher display area ratio by integrating transparent and driving emission areas, allowing for both light transmission and display functions, enhancing flexibility and reducing thickness, suitable for various applications including mobile devices.
Implementation Method 1
An EL display device includes a plurality of electroluminescence (EL) diodes. An EL diode includes an anode electrode, a light emitting layer that is formed on the anode electrode, and a cathode electrode that is formed on the light emitting layer. When a high-potential voltage is applied to the anode electrode and a low-potential voltage is applied to the cathode electrode, holes in the anode electrode and electrons in the cathode electrode move to the lighting emitting layer. When holes and electrons are coupled in the light emitting layer, excitons are formed in the course of excitation and light is generated due to energy from the excitons.
Data Source
AI summary
A partial transparent display device has a light transmitting function and a light emitting function in one area. The partial transparent display device includes a substrate, a transparent emission area, a driving emission area, and a pad part. The transparent emission area is disposed to be adjacent to one side of the substrate. The driving emission area is disposed to be adjacent to the transparent emission area and to be closer to the other side opposite to the one side. The pad part extends from the driving emission area and is disposed on the other side. The driving emission area includes driving emission pixels which are defined by scan lines, data lines, and pixel driving power supply lines. The transparent emission area includes transparent emission pixels which are defined without the scan lines, the data lines, and the pixel driving power supply lines.