Display Panel Retaining Wall and Capacitive Gap Detection
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Solution Overview
Problem
In display panels using Micro LEDs or Mini LEDs, interference between adjacent light-emitting elements affects display performance due to beam interference, leading to issues like lateral light leakage and poor alignment during substrate attachment.
Innovation Solution
A display panel design with a retaining wall structure on one substrate and overlapping electrodes forming a capacitor to detect attachment thickness, allowing for accurate alignment and preventing beam interference by isolating light-emitting elements, and a detection method using direct current charging signals to measure capacitance and determine the thickness between electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If Micro LEDs or Mini LEDs are used in display panels, then display resolution and compactness are improved, but beam interference between adjacent light-emitting elements occurs affecting display performance
Solution Approach 1:
The patent introduces a retaining wall structure that divides the display panel into separate regions for adjacent light-emitting elements. This segmentation physically isolates the beam paths of Micro LEDs or Mini LEDs, preventing beam interference while maintaining the compact high-resolution display design.
Solution Approach 2:
The retaining wall structure acts as an intermediary element between adjacent light-emitting elements. It serves as a physical barrier that blocks and isolates the light beams, preventing them from interfering with each other while allowing the compact Micro LED or Mini LED configuration to function properly.
2Ease of manufacture
If substrate attachment thickness is not accurately controlled, then manufacturing process is simpler, but alignment between first substrate and second substrate deteriorates
Solution Approach 1:
The patent implements a self-detection and self-correction mechanism where the attachment thickness detection capacitor automatically measures the gap between substrates, and the control circuit automatically adjusts the attachment process based on the measured capacitance value, achieving precise alignment without complex external measurement equipment.
Solution Approach 2:
The patent establishes a feedback loop where the attachment thickness detection capacitor continuously monitors the gap between substrates during the attachment process, and the control circuit uses this feedback information to adjust and control the attachment thickness, ensuring precise alignment while maintaining manufacturing simplicity.
3Manufacturing precision
If attachment thickness detection capacitor is added to detect gap between substrates, then substrate alignment precision is improved, but device complexity increases
Solution Approach 1:
The detection capacitor serves multiple functions: it acts as both a standard capacitor for normal display operation and as an attachment thickness detection capacitor for measuring the gap between substrates. This multi-functionality reduces the need for separate dedicated detection components, thereby limiting the increase in device complexity.
Solution Approach 2:
The patent merges the detection function with the existing capacitor structure in the display panel. The same capacitor that serves electrical functions in the display also serves as the sensing element for attachment thickness detection, combining multiple functions into a single component to minimize added complexity.
4Object-affected harmful factors
If retaining wall structure is introduced to isolate light-emitting elements, then beam interference is prevented, but device complexity increases
Solution Approach 1:
The retaining wall structure segments the display panel into distinct regions for each light-emitting element, creating physical isolation that prevents beam interference. This segmentation approach efficiently solves the interference problem while maintaining a relatively simple overall structure that integrates well with standard display panel manufacturing.
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 effectively prevents beam interference and ensures accurate alignment of substrates, enhancing display performance by isolating light-emitting elements and providing a method to detect and correct attachment thickness, thereby reducing the production of unqualified products.
Implementation Method 1
a first electrode and a second electrode which forms a capacitor with the first electrode
Data Source
AI summary
Provided are a display panel and a detection method therefor, and a display device. A first substrate of the display panel includes a first base plate and light-emitting elements. A second substrate opposite to the first substrate includes a second base plate and a retaining wall structure. An orthographic projection of the retaining wall structure onto the first substrate is located between adjacent light-emitting elements. The first substrate includes a first electrode, the second substrate includes a second electrode. In a first direction perpendicular to a plane where the display panel is located, the first electrode and the second electrode at least partially overlap as a first overlap, and the retaining wall structure and the first overlap at least partially overlap. The first and second electrodes are electrically connected to first signal terminal and second signal terminal, respectively.