Display Pixel ESD Protection With Integrated Light-Shielding Line
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Solution Overview
Problem
Display device pixels are vulnerable to static electricity, which can cause damage when applied through data lines, necessitating a protective structure to prevent static electricity exposure.
Innovation Solution
A display device design incorporating a data line, first and second power lines, pixels connected to these lines, a transistor in a non-display area, and a first light shielding layer extending from the second power line to the transistor, with grooves on the light shielding layer to protect the anti-static element from external light and maintain its characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light shielding structure is added to protect the anti-static element, then the anti-static element is protected from light, but the device complexity increases
Solution Approach 1:
The light shielding layer is merged with the existing power line structure. The second power line extends to overlap the anti-static element, and the light shielding layer is formed on this extended portion, combining the power line function with the light shielding function in a single integrated structure.
Solution Approach 2:
The second power line serves dual purposes: it provides electrical power to the anti-static element and simultaneously acts as a base for the light shielding layer. This multi-functional design eliminates the need for a separate light shielding structure, reducing overall device complexity while maintaining protection functionality.
2Object-affected harmful factors
If the second power line is extended to overlap the anti-static element, then light shielding is achieved, but the area occupied by power lines increases
Solution Approach 1:
The light shielding function is combined with the power line routing. By extending the second power line to overlap the anti-static element and forming a light shielding layer on it, the patent uses the same structural space for both power delivery and light protection, avoiding additional area occupation.
3Object-affected harmful factors
If a light shielding layer is disposed on the transistor, then the anti-static element is protected from light, but the manufacturing precision requirements increase
Solution Approach 1:
The second power line is extended in advance to overlap the anti-static element during the routing stage, creating a predetermined position for the light shielding layer. This preliminary positioning action ensures that the light shielding layer will be automatically placed in the correct location during subsequent manufacturing steps, reducing precision requirements.
Solution Approach 2:
The light shielding layer formation is merged with the existing power line manufacturing process. Since the second power line already extends to the required position, the light shielding layer can be formed on this existing structure using the same manufacturing steps, eliminating the need for separate high-precision positioning operations.
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 static electricity from reaching the pixels and shields the anti-static element from external light, ensuring the display device's operational integrity and maintaining the anti-static element's properties.
Implementation Method 1
as the first light shielding layer is disposed on a semiconductor layer of an anti-static element and a second light shielding layer is disposed under the semiconductor layer, the semiconductor layer is blocked from an external light
Data Source
AI summary
A display device includes a data line, a first power line, a second power line, a pixel disposed in a display area and connected to the data line, the first power line, and the second power line, a transistor disposed in a non-display area around the display area and connected to the data line and the first power line, and a first light shielding layer extending from a portion of the second power line to the transistor and disposed on the transistor.