Display Panel Connection Line Anti-Reflection for Hidden Routing
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Solution Overview
Problem
Display devices face issues with lines in non-display areas affecting image quality and light transmission, making these lines visible and potentially causing failures in areas where images are displayed.
Innovation Solution
The implementation of a display device design with distinct non-display and display areas, featuring a connection line covered by an anti-reflection layer, where the connection line is partially in both areas and electrically connects transistors and anode electrodes, with a stack structure of titanium (Ti)/aluminum (Al)/titanium (Ti) and an anti-reflection layer made of molybdenum (Mo) or its alloys, enhancing light transmittance and reducing visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a connection line is placed in the display area to electrically connect the transistor and anode electrode, then electrical connectivity is achieved, but the line becomes visible and affects image quality
Solution Approach 1:
An anti-reflection layer is introduced as an intermediary component between the connection line and the external environment. This layer mediates the optical interaction by absorbing or reducing reflections from the metal line, making it less visible while preserving its electrical connectivity function.
Solution Approach 2:
The anti-reflection layer modifies the optical properties of the connection line by changing its reflectivity characteristics. Through material selection and thickness control, the layer reduces the visible contrast of the metal line against the display background, effectively 'changing the color' or optical appearance of the line.
2Reliability
If the connection line is made wider to reduce electrical resistance, then electrical performance improves, but the line becomes more visible
Solution Approach 1:
The anti-reflection layer serves as a visual mask that decouples the electrical dimension (where wider lines are better) from the optical dimension (where narrower lines are less visible). It allows the line to be electrically optimized without suffering the full visual penalty.
Solution Approach 2:
By changing the optical parameters of the connection line through the anti-reflection layer (specifically reflectivity and absorption characteristics), the patent allows the electrical parameters (width, resistance) to be optimized independently without directly increasing visibility.
3Area of stationary object
If optical devices are relocated to overlap the display panel to eliminate front face holes, then display area is increased, but lines in the overlapping area become visible and may cause failures
Solution Approach 1:
The anti-reflection layer acts as a protective intermediary that allows connection lines to be placed in the display area without causing visual defects or functional failures. It mediates between the need for electrical connectivity and the requirement for optical quality in the display region.
Solution Approach 2:
The patent converts the potentially harmful presence of metal lines in the display area into a beneficial configuration by using the anti-reflection layer to make the lines invisible. What would normally be a defect (visible line) is transformed into an acceptable solution through optical management.
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 design effectively suppresses or prevents failures caused by lines in display areas, making them less visible while maintaining higher light transmittance, thereby improving image quality and aesthetic appeal.
Implementation Method 1
at least a part of the connection line is in at least one of the first area and the second area, and is covered by an anti-reflection layer
Data Source
AI summary
A display device is provided. A display device includes a non-display area where no image is displayed, and a display area where images are displayed, and including a first area and a second area having different light transmittances, and a first pixel and a second pixel, wherein a transistor and an anode electrode of the first pixel are in the first area, wherein an anode electrode of the second pixel is in the second area, and a transistor of the second pixel is outside the second area, wherein the anode electrode and the transistor of the second pixel are electrically connected by a connection line, and wherein at least a part of the connection line is in at least one of the first area and the second area, and is covered by an anti-reflection layer.