Display Apparatus Light Sensing Conductive Layer Leakage Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display apparatuses lack a light sensing function with high reliability and accuracy, and fail to provide a multifunctional solution that combines high display quality and light sensitivity, especially in capturing clear images and functioning as a touch panel.
Innovation Solution
A display apparatus incorporating a light-receiving element and a light-emitting element, with a conductive layer positioned between the pixel electrodes to suppress side leakage current, allowing for effective light sensing and touch operation detection, and utilizing a common layer shared by both elements to reduce manufacturing steps and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a light-receiving element is added to the display apparatus, then light sensing function is achieved, but device complexity increases
Solution Approach 1:
The patent combines light-receiving elements and light-emitting elements into a single display apparatus structure, sharing common components such as the common layer, common electrode, and substrate. This merging approach enables the display apparatus to perform both display and light sensing functions simultaneously, achieving multifunctionality while controlling complexity through component sharing.
Solution Approach 2:
The display apparatus is designed with universal components that serve multiple functions. The common layer and common electrode structure are used by both light-receiving elements and light-emitting elements, allowing the same hardware to perform display, light sensing, and touch panel operations, thereby reducing overall device complexity despite adding functionality.
2Adaptability or versatility
If light-receiving element and light-emitting element are integrated, then multifunctionality is achieved, but manufacturing complexity increases
Solution Approach 1:
The patent merges light-receiving elements and light-emitting elements into a unified structure where both element types share common layers, common electrodes, and substrate structures. This integration allows simultaneous achievement of display and light sensing functions while streamlining the manufacturing process through reduced material deposition steps and simplified fabrication sequences.
3Reliability
If conductive layer is added between pixel electrodes, then side leakage current is suppressed, but device complexity increases
Solution Approach 1:
The conductive layer acts as an intermediary component positioned between the first pixel electrode and second pixel electrode. This intermediate layer effectively suppresses side leakage current by providing a controlled electrical pathway, while its integration into the existing common layer structure minimizes the increase in device complexity.
4Measurement precision
If aperture ratio is increased for light sensing, then light sensitivity is improved, but display quality may be affected
Solution Approach 1:
The patent applies local quality differentiation by designing specific regions with different characteristics. The light-receiving elements are positioned to capture light for sensing operations, while light-emitting elements are strategically arranged to provide display functionality. This spatial differentiation allows the aperture ratio to be optimized for light sensing in specific areas without compromising overall display quality.
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 display apparatus with high light sensing accuracy, capable of capturing clear images and functioning as a touch panel, while reducing noise and increasing the aperture ratio, thus enhancing display quality and reliability.
Implementation Method 1
A display apparatus including a light-receiving element, a light-emitting element... The light-receiving element includes a first pixel electrode, a common layer over the first pixel electrode, an active layer over the common layer, and a common electrode over the active layer
Implementation Method 2
Light-emitting elements (also referred to as EL elements) utilizing an electroluminescence (hereinafter referred to as EL) phenomenon have features such as ease of reduction in thickness and weight
Data Source
AI summary
A display apparatus that has a light sensing function is provided. A display apparatus that has high light sensitivity is provided. The display apparatus includes a light-receiving element, a light-emitting element, a conductive layer, and a first wiring. The light-receiving element includes a first pixel electrode, a common layer, an active layer, and a common electrode. The light-emitting element includes a second pixel electrode, the common layer, a light-emitting layer, and the common electrode. The conductive layer is provided over the same surface as the first pixel electrode and the second pixel electrode, is positioned between the first pixel electrode and the second pixel electrode, is electrically connected to the common layer, and is electrically connected to the first wiring to which a first potential is supplied. The common layer includes a portion overlapping with the first pixel electrode, a portion overlapping with the second pixel electrode, and a portion overlapping with the conductive layer. The common electrode includes a portion overlapping with the first pixel electrode and a portion overlapping with the second pixel electrode. The first wiring is provided over a surface different from the surface where the conductive layer is provided.